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CN112879565B - Corrosion-resistant radial cylindrical surface sealing device - Google Patents

Corrosion-resistant radial cylindrical surface sealing device Download PDF

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Publication number
CN112879565B
CN112879565B CN202110042745.4A CN202110042745A CN112879565B CN 112879565 B CN112879565 B CN 112879565B CN 202110042745 A CN202110042745 A CN 202110042745A CN 112879565 B CN112879565 B CN 112879565B
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corrosion
sealing ring
resistant sealing
ring
cable
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CN112879565A (en
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许志峰
王世英
计冬奎
袁宝慧
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Xian Modern Chemistry Research Institute
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Xian Modern Chemistry Research Institute
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/068—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces the packing swelling under working conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sealing Devices (AREA)
  • Gasket Seals (AREA)

Abstract

The invention discloses a corrosion-resistant radial cylindrical surface sealing device, wherein the lower end of a fourth semicircular revolution surface of an opposite-sex spring ring is contacted with the joint of a first lower end circular ring surface of an end cover and a second lower end circular ring surface of a cable passing pipe; the spring ring is arranged at the lower end of the polytetrafluoroethylene sealing ring, the spring ring is axially compressed and deformed after being subjected to axial pressure, the compressed spring ring can continuously output axial force, upward supporting force is given to two inverted V-shaped edges of the polytetrafluoroethylene sealing ring, the durability of the sealing effect is ensured, and the sealing reliability of a warhead is ensured.

Description

Corrosion-resistant radial cylindrical surface sealing device
Technical Field
The invention belongs to the technical field of sealing devices, relates to a radial sealing device, and particularly relates to a corrosion-resistant radial cylindrical surface sealing device.
Background
The liquid-phase charging warhead is internally filled with high-energy fuel, the high-energy fuel is thrown into the air under the action of explosive explosion throwing driving, the high-energy fuel is atomized and mixed with the air to form a large-range active cloud cluster, and the active cloud cluster generates body detonation and releases strong shock waves after secondary detonation of the explosive, wherein the shock wave power exceeds the explosive power of TNT with multiple times of mass, and the liquid-phase charging warhead is one of the most powerful non-nuclear weapons.
The high-energy fuel filled in the liquid-phase charging warhead contains liquid-phase materials, so that all parts in the liquid-phase charging warhead, which are contacted with the high-energy fuel, need to have sealing performance, and mechanical interfaces of a shell, front and rear end covers, a charging opening, a cable-passing line pipe, a pesticide throwing pipe and the like of the liquid-phase charging warhead need to meet the sealing requirements.
Changchun et al reported in the document "missile rubber seal environmental failure study" (equipment environmental engineering, 8 months 2011, volume 8, page 4, 59): the warhead sealing material mainly adopts rubber. The elastic modulus of the rubber is 7.8MPa, the rubber has good elasticity, when the rubber is in extrusion contact with the metal shell, the rubber is elastically deformed under the action of pressure, and the rubber and the metal shell can be well attached to realize a sealing effect.
High-energy liquid-phase fuel filled in the liquid-phase charging warhead has strong corrosivity, and various rubber materials are subjected to chemical reaction with the high-energy liquid-phase fuel to lose effectiveness. When the liquid-phase charging warhead is applied to a weapon platform, the storage condition of at least ten years needs to be met. In the long-term storage process, the rubber sealing element is aged because of chemical reaction with high-energy liquid phase fuel, and the rubber after reaction loses resilience and no longer plays a sealing role, so once the liquid phase charging warhead is leaked, the warhead is failed, and major accidents are caused at the same time.
Zhang Dongna et al report the effect of stretching treatment on polytetrafluoroethylene properties in the literature "journal of aeronautical materials, 12 months 2013, volume 33, page 57, 6): the polytetrafluoroethylene is a high polymer material with excellent comprehensive performance and has excellent high and low temperature resistance and chemical corrosion resistance. A project team performs a compatibility experiment of polytetrafluoroethylene and high-energy liquid-phase fuel, and finds that the polytetrafluoroethylene material does not react with the high-energy liquid-phase fuel chemically, the polytetrafluoroethylene material meets the compatibility with the high-energy liquid-phase fuel, and a sealing ring made of the polytetrafluoroethylene material can be used for a long time in a liquid-phase charging warhead and has a long-term storage condition.
However, the polytetrafluoroethylene has poor compressibility, the elastic modulus of the polytetrafluoroethylene is 280MPa, the tensile strength of the polytetrafluoroethylene is 15MPa, and the tensile strength is only 5.3% of the elastic modulus, that is, when the deformation amount of the polytetrafluoroethylene material exceeds 5.3%, the polytetrafluoroethylene material is deformed and damaged. As a sealing ring material, the compressibility is an extremely important property, the use difficulty of the polytetrafluoroethylene is increased due to poor compressibility, and the reliable long-term sealing difficulty is increased.
The liquid-phase explosive loading warhead contains a primary throwing fuse and a secondary detonating fuse, and a power supply needs to supply power to the two fuses simultaneously. Yao Jinxia et al reported a liquid-phase explosive-charging warhead structure in the document "current development and prospect of fuel-air explosives" (aeronautical missile, 85 p 2 of 2014), where a power supply and a primary fuse are located at the head of the liquid-phase explosive-charging warhead, a secondary fuse is located at the tail of the liquid-phase explosive-charging warhead, the power supply and the secondary fuse are connected by a cable, and high-energy fuel charged during explosion of the liquid-phase explosive-charging warhead is corrosive to a rubber sheath of the cable, so that a metal cable-penetrating pipe needs to be installed inside a projectile body, and the cable is in the metal cable-penetrating pipe to avoid contact with the high-energy fuel. The diameter of the cable conduit is 70.3-71.0 mm, the wall thickness of the cable conduit is 4.0-4.5 mm, and the internal stress of the internal high-energy liquid phase fuel is not more than 0.3MPa. As the center of the liquid-phase explosive-charging warhead is provided with the throwing explosive, the metal cable-through line pipe can only be arranged at the eccentric position of the projectile body. The cable-through line pipe is in fit contact with the warhead end cover through a radial cylindrical surface, and the cylindrical surface contact positions of the two parts need to be sealed.
Xu Jinpeng, et al, in the literature, "analysis of causes of leakage problems in O-ring seals and preventive measures" (2013, page 677, 11 th) reported a radial seal structure, which is suitable for sealing shaft-hole parts with cylindrical contact surfaces, and has an annular groove machined in the shaft-like part or hole-like part, and a seal ring installed in the annular groove is pressed against the shaft-like part and hole-like part simultaneously after being radially pressed, thereby achieving sealing. However, the installation of the polytetrafluoroethylene sealing ring in the radial sealing structure has the following problems:
(1) The sealing ring is arranged in an annular groove of the radial sealing structure, the diameter of the sealing ring needs to be enlarged firstly, and the sealing ring is naturally restored to the original size by the elasticity of the sealing ring after being arranged in the annular groove. However, the polytetrafluoroethylene has poor compressibility, the polytetrafluoroethylene sealing ring is very difficult to expand in diameter, if the diameter is forcibly expanded, the polytetrafluoroethylene sealing ring is subjected to permanent deformation and damage, and the diameter cannot be restored to the original size, so that the polytetrafluoroethylene sealing ring in the radial sealing structure cannot be installed.
(2) The elastic deformation capacity of the polytetrafluoroethylene is poor, under the same compression force, the elastic deformation amount of the polytetrafluoroethylene sealing ring is much smaller than that of the rubber sealing ring, the adhesion degree of the polytetrafluoroethylene sealing ring with a cable-through spool and a warhead end cover is poor, and the sealing reliability is poor.
(3) Wu Difei et al reported in "research on modification technology of polytetrafluoroethylene sealing material" (chemical engineering, 2006, volume 26, page 6, 66): the polytetrafluoroethylene sealing material has inherent defects and poor creep resistance, and can creep and deform under the action of pressure, so that the polytetrafluoroethylene material after creep deformation becomes loose and has no rebound resilience any more, cannot be well extruded and attached to a metal shell, and loses the sealing effect.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the corrosion-resistant radial cylindrical surface sealing device, the lower end of the polytetrafluoroethylene sealing ring is provided with the spring ring, the spring ring is axially compressed and deformed after being subjected to axial pressure, and the compressed spring ring can continuously output axial force to provide upward supporting force for two inverted V-shaped edges of the polytetrafluoroethylene sealing ring, so that the durability of the sealing effect is ensured, and the sealing reliability of a warhead is ensured.
The invention provides a corrosion-resistant radial cylindrical surface sealing device. The cable comprises an end cover 1 and a cable tube 2, and is characterized by further comprising an opposite-nature corrosion-resistant sealing ring 3, an opposite-nature spring ring 4 and a pretightening force generating device 5;
the end cover 1 is in a first circular plate shape, the first circular plate of the end cover 1 is provided with a first circular hole, the inner side surface of the first circular hole of the end cover 1 is a first inner cylindrical surface, the upper end of the first inner cylindrical surface of the end cover 1 is provided with a first annular groove, the upper end surface of the first annular groove of the end cover 1 is coplanar with the upper end surface of the first circular plate of the end cover 1, the lower end surface of the first annular groove of the end cover 1 is a first lower end annular surface, and the bottom surface of the first annular groove of the end cover 1 is a first upper end inner cylindrical surface;
the central axis of a first circular hole of the end cover 1 is vertical to the ground, the end cover 1 is an end cover of a liquid-phase charging warhead, and liquid-phase materials are arranged on the inner side of the end cover 1;
the cable wire tube 2 is in a second circular tube shape, the second circular tube penetrating the cable wire tube 2 is a rotary body, the outer side surface of the second circular tube penetrating the cable wire tube 2 is a second outer cylindrical surface, a second annular groove is formed in the upper end of the second outer cylindrical surface penetrating the cable wire tube 2, the upper end face of the second annular groove penetrating the cable wire tube 2 is coplanar with the upper end face of the second circular tube penetrating the cable wire tube 2, the lower end face of the second annular groove penetrating the cable wire tube 2 is a second lower end circular ring face, and the bottom face of the second annular groove penetrating the cable wire tube 2 is a second upper end outer cylindrical face;
the inner side of a second circular tube penetrating through the cable spool 2 is used for filling cables of a liquid-phase charge warhead part, a liquid-phase material is arranged on the outer side of the cable spool 2, the axis of a rotary body penetrating through the cable spool 2 is coincident with the central axis of a first circular hole of the end cover 1, the upper end of the cable spool 2 is positioned on the inner side of the first circular hole of the end cover 1, a second outer cylindrical surface penetrating through the cable spool 2 is in contact with a first inner cylindrical surface of the end cover 1, and the contact surface of the cable spool 2 and the end cover 1 is a radial cylindrical surface;
the shape of the heterosexual corrosion-resistant sealing ring 3 is a revolving body, the material of the heterosexual corrosion-resistant sealing ring 3 is polytetrafluoroethylene, the axial section of the revolving body of the heterosexual corrosion-resistant sealing ring 3 is in a third inverted V shape, the third inverted V-shaped opening of the heterosexual corrosion-resistant sealing ring 3 is downward, two sides of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 are positioned at the lower end, the middle intersection point of the two sides of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 is positioned at the upper end, the left lower end of the side of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 positioned at the left side of the V-shaped is provided with a third left end external fillet, the right lower end of the edge of the third inverted V-shaped on the right side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third right-end external fillet, the middle lower end of the edge of the third inverted V-shaped on the left side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third left-end middle internal fillet, the middle lower end of the edge of the third inverted V-shaped on the right side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third right-end middle internal fillet, the inner side of the lower end of the middle intersection point of the two edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring 3 is provided with a third middle internal fillet, and the outer side of the upper end of the middle intersection point of the two edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring 3 is provided with a third straight line segment;
the revolution body axis of the different-nature corrosion-resistant sealing ring 3 is coincided with the revolution body axis of the cable passing conduit 2, the different-nature corrosion-resistant sealing ring 3 is positioned at the inner side of a first annular groove of the end cover 1, the different-nature corrosion-resistant sealing ring 3 is positioned at the outer side of a second annular groove of the cable passing conduit 2, the revolution surface of a third left-end excircle corner of the different-nature corrosion-resistant sealing ring 3 is contacted with a first upper-end inner cylindrical surface of the end cover 1, and the revolution surface of a third right-end excircle corner of the different-nature corrosion-resistant sealing ring 3 is contacted with a second upper-end outer cylindrical surface of the cable passing conduit 2;
the special-shaped spring ring 4 is a revolving body, the special-shaped spring ring 4 is made of spring steel, the axial section of the revolving body of the special-shaped spring ring 4 is in a fourth semicircle shape, the opening of the fourth semicircle shape of the special-shaped spring ring 4 is upward, the left end of the fourth semicircle shape of the special-shaped spring ring 4 is connected with the semicircle shape of the fourth left end, the semicircular opening of the fourth left end of the special-shaped spring ring 4 is downward, the right end of the fourth semicircle shape of the special-shaped spring ring 4 is connected with the semicircle shape of the fourth right end, and the semicircular opening of the fourth right end of the special-shaped spring ring 4 is downward;
the revolving body axis of the opposite sex spring ring 4 coincides with the revolving body axis of the cable passing conduit 2, the opposite sex spring ring 4 is positioned at the lower end of the opposite sex corrosion-resistant sealing ring 3, the opposite sex spring ring 4 is positioned at the inner side of the first annular groove of the end cover 1, the opposite sex spring ring 4 is positioned at the outer side of the second annular groove of the cable passing conduit 2, the lower end of the fourth semicircular revolving surface of the opposite sex spring ring 4 is contacted with the joint of the first lower end annular surface of the end cover 1 and the second lower end annular surface of the cable passing conduit 2, the upper end of the fourth left end semicircular revolving surface of the opposite sex spring ring 4 is contacted with the revolving surface of the inner circular angle at the middle part of the third left end of the opposite sex corrosion-resistant sealing ring 3, and the upper end of the fourth right end semicircular revolving surface of the opposite sex spring ring 4 is contacted with the revolving surface of the inner circular angle at the middle part of the third right end of the opposite sex corrosion-resistant sealing ring 3;
the shape of the pretightening force generating device 5 is a fifth torus, the fifth torus of the pretightening force generating device 5 is a revolving body, the axial cross section of the fifth torus of the pretightening force generating device 5 is rectangular, a fifth outer flange is arranged at the upper end of the outer cylindrical surface of the fifth torus of the pretightening force generating device 5, and a fifth inner flange is arranged at the upper end of the inner cylindrical surface of the fifth torus of the pretightening force generating device 5;
the axis of a revolving body of the pretightening force generating device 5 is superposed with the axis of a revolving body of the cable-through conduit 2, the pretightening force generating device 5 is positioned at the upper end of the different-nature corrosion-resistant sealing ring 3, the pretightening force generating device 5 is positioned at the inner side of a first annular groove of the end cover 1, the pretightening force generating device 5 is positioned at the outer side of a second annular groove of the cable-through conduit 2, a fifth outer flange of the pretightening force generating device 5 is connected with the first annular plate of the end cover 1 through screws, the lower end surface of a fifth outer flange of the pretightening force generating device 5 is contacted with the upper end surface of the first annular plate of the end cover 1, a fifth inner flange of the pretightening force generating device 5 is connected with a second circular tube of the cable-through conduit 2 through screws, the lower end surface of a fifth inner flange of the pretightening force generating device 5 is contacted with the upper end surface of the second circular tube of the cable-through conduit 2, and the lower end surface of the pretightening force generating device 5 is contacted with the revolution surface of the third straight-line section of the different-nature corrosion-resistant sealing ring 3;
the diameter of a third left-end external corner of the anisotropic corrosion-resistant sealing ring 3 is the same as that of a third right-end external corner of the anisotropic corrosion-resistant sealing ring 3, and the diameter of the third left-end external corner of the anisotropic corrosion-resistant sealing ring 3 is 5.1-8.8 mm;
the diameter of a third middle fillet of the opposite corrosion-resistant sealing ring 3 is 11.4-13.1 mm;
the diameter of the inner circle angle in the middle of the third left end of the opposite-nature corrosion-resistant sealing ring 3, the diameter of the inner circle angle in the middle of the third right end of the opposite-nature corrosion-resistant sealing ring 3, the diameter of the semicircular diameter of the fourth left end of the opposite-nature spring ring 4 and the diameter of the semicircular diameter of the fourth right end of the opposite-nature spring ring 4 are the same, and the diameter of the inner circle angle in the middle of the third left end of the opposite-nature corrosion-resistant sealing ring 3 is 14.2-16.7 mm;
the included angle of two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 is 123-127 degrees;
the pressure intensity of the lower end surface of the pretightening force generating device 5 facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 1.7-2.3 MPa;
the corrosion-resistant radial cylindrical surface sealing device comprises the following steps:
step 1: assembling the end cover 1 and the cable tube 2;
and 2, step: assembling the special-shaped spring ring 4 with the end cover 1;
and step 3: assembling the special-shaped corrosion-resistant sealing ring 3 and the special-shaped spring ring 4;
and 4, step 4: the pre-tightening force generating device 5 is respectively assembled with the end cover 1 and the cable-through line pipe 2, the lower end face of the pre-tightening force generating device 5 extrudes a revolution surface of a third straight line section of the anisotropic corrosion-resistant sealing ring 3, the included angle between two V-shaped side angles of a third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 under the action of axial force is increased, the revolution surface of a third left-end external corner of the anisotropic corrosion-resistant sealing ring 3 is extruded with a first upper-end inner cylindrical surface of the end cover 1 to realize sealing, the revolution surface of a third right-end external corner of the anisotropic corrosion-resistant sealing ring 3 is extruded with a second upper-end external cylindrical surface of the cable-through line pipe 2 to realize sealing, the anisotropic corrosion-resistant sealing ring 3 extrudes the anisotropic spring ring 4, the upper end of a fourth left-end semicircular revolution surface of the anisotropic spring ring 4 is in contact with the revolution surface of a third left-end middle inner corner of the anisotropic corrosion-resistant sealing ring 3 to continuously output supporting force, and the upper end of a fourth semicircular revolution surface of the anisotropic spring ring 4 is in contact with the third right-end middle inner corner of the anisotropic corrosion-resistant sealing ring 3 to continuously output supporting force.
Regarding the diameter of the third left end external fillet of the different-property corrosion-resistant sealing ring 3, the diameter of the third left end middle internal fillet of the different-property corrosion-resistant sealing ring 3, the included angle between the two V-shaped edges of the third inverted V-shape of the different-property corrosion-resistant sealing ring 3, and the pressure of the lower end surface of the pretightening force generating device 5 to the revolution surface of the third straight line segment of the different-property corrosion-resistant sealing ring 3, any one of the following 2 modes can be adopted:
implementation mode 1: the diameter of a third left-end excircle corner of the anisotropic corrosion-resistant sealing ring 3 is 5.1mm;
the diameter of an inner fillet at the middle part of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 11.4mm;
the diameter of a third middle fillet of the opposite corrosion-resistant sealing ring 3 is 14.2mm;
the included angle of two V-shaped edges of the third inverted V-shaped anisotropic corrosion-resistant sealing ring 3 is 123 degrees;
the pressure intensity of the lower end surface of the pretightening force generating device 5 facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 1.7MPa.
Implementation mode 2: the diameter of a fillet at the third left end of the anisotropic corrosion-resistant sealing ring 3 is 8.8mm;
the diameter of an inner fillet at the middle part of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 13.1mm;
the diameter of a third middle fillet of the opposite corrosion-resistant sealing ring 3 is 16.7mm;
the included angle of two V-shaped edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring 3 is 127 degrees;
the pressure intensity of the lower end surface of the pretightening force generating device 5 facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 2.3MPa.
The corrosion-resistant radial cylindrical surface sealing device provided by the invention has the following technical effects:
(1) The invention can solve the sealing problem of the matching contact surface of the radial cylindrical surface of the cable conduit penetrating through the liquid-phase charging warhead and the shell end cover, the diameter of the applicable cable conduit penetrating through the cable conduit is 70.3-71.0 mm, the wall thickness of the cable conduit penetrating through the cable conduit is 4.0-4.5 mm, and the internal stress of the internal liquid-phase fuel is not more than 0.3MPa. The shaft section of the polytetrafluoroethylene sealing ring is designed to be in an inverted V shape, the polytetrafluoroethylene sealing ring expands radially under the action of axial pressure, small axial force can generate multiple times of radial expansion force, and the expanded polytetrafluoroethylene sealing ring is respectively in close contact with the end cover and the cable-penetrating spool to realize sealing. The annular seal groove is opened to the top, polytetrafluoroethylene sealing washer need not change the diameter alright in order to install into annular seal groove, can install smoothly.
(2) The root of the inverted V-shaped polytetrafluoroethylene sealing ring is provided with a fillet, so that the elastic deformation capacity of polytetrafluoroethylene is increased, the deformation amount is improved under the same pressure, the defect of the deformation capacity of the material is made up through the optimization of the structure, the fitting degree of the polytetrafluoroethylene sealing ring and an end cover and a cable wire tube is improved, and the sealing reliability is improved.
(3) The spring ring has been installed to polytetrafluoroethylene sealing washer lower extreme, the spring ring receives behind the axial pressure, take place axial compression deformation, and the output axial force that the spring ring after the compression can last, give the ascending holding power in two limits of the shape of falling V-arrangement of polytetrafluoroethylene sealing washer, though the wriggling takes place along with the time for the polytetrafluoroethylene sealing washer, but under the holding power effect that lasts of spring ring, the polytetrafluoroethylene sealing washer can keep with the end cover with wear the lasting power of hugging closely of cable spool, the extrusion laminating that keeps lasting is laminated and sealed, the permanence of sealed effect has been guaranteed, the sealing reliability of warhead has been guaranteed.
Drawings
Fig. 1 is a schematic view of a corrosion-resistant radial cylinder face seal. 1. The cable comprises an end cover, 2, a cable passing spool, 3, an opposite-nature corrosion-resistant sealing ring, 4, an opposite-nature spring ring, 5 and a pre-tightening force generating device.
Detailed Description
The present invention is further described in detail with reference to the drawings and examples, it should be noted that the present invention is not limited to the following examples, and equivalent changes based on the technical scheme of the present invention are within the scope of the present invention.
Example 1:
this embodiment presents a corrosion resistant radial cylindrical surface seal as shown in fig. 1. The cable comprises an end cover 1 and a cable tube 2, and is characterized by further comprising an opposite-nature corrosion-resistant sealing ring 3, an opposite-nature spring ring 4 and a pretightening force generating device 5;
the end cover 1 is in a first circular plate shape, the first circular plate of the end cover 1 is provided with a first circular hole, the inner side surface of the first circular hole of the end cover 1 is a first inner cylindrical surface, the upper end of the first inner cylindrical surface of the end cover 1 is provided with a first annular groove, the upper end surface of the first annular groove of the end cover 1 is coplanar with the upper end surface of the first circular plate of the end cover 1, the lower end surface of the first annular groove of the end cover 1 is a first lower end annular surface, and the bottom surface of the first annular groove of the end cover 1 is a first upper end inner cylindrical surface;
the central axis of a first circular hole of the end cover 1 is vertical to the ground, the end cover 1 is an end cover of a liquid-phase charging warhead, and liquid-phase materials are arranged on the inner side of the end cover 1;
the cable wire tube 2 is in a second circular tube shape, the second circular tube penetrating the cable wire tube 2 is a rotary body, the outer side surface of the second circular tube penetrating the cable wire tube 2 is a second outer cylindrical surface, a second annular groove is formed in the upper end of the second outer cylindrical surface penetrating the cable wire tube 2, the upper end face of the second annular groove penetrating the cable wire tube 2 is coplanar with the upper end face of the second circular tube penetrating the cable wire tube 2, the lower end face of the second annular groove penetrating the cable wire tube 2 is a second lower end circular ring face, and the bottom face of the second annular groove penetrating the cable wire tube 2 is a second upper end outer cylindrical face;
the inner side of a second circular tube penetrating through the cable spool 2 is used for filling cables of a liquid-phase charge warhead part, a liquid-phase material is arranged on the outer side of the cable spool 2, the axis of a rotary body penetrating through the cable spool 2 is coincident with the central axis of a first circular hole of the end cover 1, the upper end of the cable spool 2 is positioned on the inner side of the first circular hole of the end cover 1, a second outer cylindrical surface penetrating through the cable spool 2 is in contact with a first inner cylindrical surface of the end cover 1, and the contact surface of the cable spool 2 and the end cover 1 is a radial cylindrical surface;
the shape of the heterosexual corrosion-resistant sealing ring 3 is a revolving body, the material of the heterosexual corrosion-resistant sealing ring 3 is polytetrafluoroethylene, the axial section of the revolving body of the heterosexual corrosion-resistant sealing ring 3 is in a third inverted V shape, the third inverted V-shaped opening of the heterosexual corrosion-resistant sealing ring 3 is downward, two sides of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 are positioned at the lower end, the middle intersection point of the two sides of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 is positioned at the upper end, the left lower end of the side of the third inverted V-shaped of the heterosexual corrosion-resistant sealing ring 3 positioned at the left side of the V-shaped is provided with a third left end external fillet, the right lower end of the edge of the third inverted V-shaped on the right side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third right-end external fillet, the middle lower end of the edge of the third inverted V-shaped on the left side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third left-end middle internal fillet, the middle lower end of the edge of the third inverted V-shaped on the right side of the V-shape of the anisotropic corrosion-resistant sealing ring 3 is provided with a third right-end middle internal fillet, the inner side of the lower end of the middle intersection point of the two edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring 3 is provided with a third middle internal fillet, and the outer side of the upper end of the middle intersection point of the two edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring 3 is provided with a third straight line segment;
the revolution body axis of the different-nature corrosion-resistant sealing ring 3 is coincided with the revolution body axis of the cable passing conduit 2, the different-nature corrosion-resistant sealing ring 3 is positioned at the inner side of a first annular groove of the end cover 1, the different-nature corrosion-resistant sealing ring 3 is positioned at the outer side of a second annular groove of the cable passing conduit 2, the revolution surface of a third left-end excircle corner of the different-nature corrosion-resistant sealing ring 3 is contacted with a first upper-end inner cylindrical surface of the end cover 1, and the revolution surface of a third right-end excircle corner of the different-nature corrosion-resistant sealing ring 3 is contacted with a second upper-end outer cylindrical surface of the cable passing conduit 2;
the shape of the special-shaped spring ring 4 is a revolving body, the special-shaped spring ring 4 is made of spring steel, the revolving body axial section of the special-shaped spring ring 4 is in a fourth semicircle shape, the fourth semicircle opening of the special-shaped spring ring 4 is upward, the left end of the fourth semicircle of the special-shaped spring ring 4 is connected with the fourth left end semicircle, the fourth left end semicircle opening of the special-shaped spring ring 4 is downward, the right end of the fourth semicircle of the special-shaped spring ring 4 is connected with the fourth right end semicircle, and the fourth right end semicircle opening of the special-shaped spring ring 4 is downward;
the revolution body axis of the opposite sex spring ring 4 coincides with the revolution body axis of the cable penetrating pipe 2, the opposite sex spring ring 4 is positioned at the lower end of the opposite sex corrosion-resistant sealing ring 3, the opposite sex spring ring 4 is positioned at the inner side of a first annular groove of the end cover 1, the opposite sex spring ring 4 is positioned at the outer side of a second annular groove of the cable penetrating pipe 2, the lower end of a fourth semicircular revolution surface of the opposite sex spring ring 4 is contacted with the joint of a first lower end annular surface of the end cover 1 and a second lower end annular surface of the cable penetrating pipe 2, the upper end of a fourth left end semicircular revolution surface of the opposite sex spring ring 4 is contacted with a revolution surface of an inner circular angle at the middle part of a third left end of the opposite sex corrosion-resistant sealing ring 3, and the upper end of a fourth right end semicircular revolution surface of the opposite sex spring ring 4 is contacted with a revolution surface of an inner circular angle at the middle part of a third right end of the opposite sex corrosion-resistant sealing ring 3;
the shape of the pretightening force generating device 5 is a fifth torus, the fifth torus of the pretightening force generating device 5 is a revolving body, the axial cross section of the fifth torus of the pretightening force generating device 5 is rectangular, a fifth outer flange is arranged at the upper end of the outer cylindrical surface of the fifth torus of the pretightening force generating device 5, and a fifth inner flange is arranged at the upper end of the inner cylindrical surface of the fifth torus of the pretightening force generating device 5;
the axis of a revolving body of the pretightening force generating device 5 is superposed with the axis of a revolving body of the cable-through conduit 2, the pretightening force generating device 5 is positioned at the upper end of the different-nature corrosion-resistant sealing ring 3, the pretightening force generating device 5 is positioned at the inner side of a first annular groove of the end cover 1, the pretightening force generating device 5 is positioned at the outer side of a second annular groove of the cable-through conduit 2, a fifth outer flange of the pretightening force generating device 5 is connected with the first annular plate of the end cover 1 through screws, the lower end surface of a fifth outer flange of the pretightening force generating device 5 is contacted with the upper end surface of the first annular plate of the end cover 1, a fifth inner flange of the pretightening force generating device 5 is connected with a second circular tube of the cable-through conduit 2 through screws, the lower end surface of a fifth inner flange of the pretightening force generating device 5 is contacted with the upper end surface of the second circular tube of the cable-through conduit 2, and the lower end surface of the pretightening force generating device 5 is contacted with the revolution surface of the third straight-line section of the different-nature corrosion-resistant sealing ring 3;
the using method and the working principle of the invention are as follows:
the corrosion-resistant radial cylindrical surface sealing device comprises the following steps:
step 1: assembling the end cover 1 and the cable tube 2;
and 2, step: assembling the special-shaped spring ring 4 with the end cover 1;
and step 3: assembling the special-shaped corrosion-resistant sealing ring 3 and the special-shaped spring ring 4;
and 4, step 4: the pre-tightening force generating device 5 is respectively assembled with the end cover 1 and the cable-through line pipe 2, the lower end face of the pre-tightening force generating device 5 extrudes a revolution surface of a third straight line section of the anisotropic corrosion-resistant sealing ring 3, the included angle between two V-shaped side angles of a third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 under the action of axial force is increased, the revolution surface of a third left-end external corner of the anisotropic corrosion-resistant sealing ring 3 is extruded with a first upper-end inner cylindrical surface of the end cover 1 to realize sealing, the revolution surface of a third right-end external corner of the anisotropic corrosion-resistant sealing ring 3 is extruded with a second upper-end external cylindrical surface of the cable-through line pipe 2 to realize sealing, the anisotropic corrosion-resistant sealing ring 3 extrudes the anisotropic spring ring 4, the upper end of a fourth left-end semicircular revolution surface of the anisotropic spring ring 4 is in contact with the revolution surface of a third left-end middle inner corner of the anisotropic corrosion-resistant sealing ring 3 to continuously output supporting force, and the upper end of a fourth semicircular revolution surface of the anisotropic spring ring 4 is in contact with the third right-end middle inner corner of the anisotropic corrosion-resistant sealing ring 3 to continuously output supporting force.
The working principle of the invention is as follows:
the polytetrafluoroethylene sealing ring is designed into a V shape, and the V-shaped deformation part is characterized in that when the V-shaped part is subjected to axial force, the V-shaped part can generate radial force, the ratio of the axial force to the radial force is the cotangent value of half of a V-shaped clamping angle, therefore, when the half of the V-shaped clamping angle is close to 90 degrees, the ratio of the axial force to the radial force is close to 0, namely the ratio of the radial force to the axial force is close to infinity, namely, multiple radial forces can be generated through small axial force, and the V-shaped polytetrafluoroethylene sealing ring is in close contact with the end cover 1 and the cable penetrating spool 2 under large radial force to realize sealing.
After the V-shaped root of the polytetrafluoroethylene sealing ring is provided with the fillet, the wall thickness of the root is reduced, the strength is reduced, and the amount of deformation can be increased under the same pressure, so that the deformation capacity of the material is improved through structural optimization, the laminating degree of the polytetrafluoroethylene sealing ring and metal parts is improved, and the sealing reliability is improved.
The spring ring is installed at the lower end of the polytetrafluoroethylene sealing ring, the spring can generate long-term elasticity after deformation, and the shortcoming is just compensated by the deformed spring because the polytetrafluoroethylene sealing ring creeps and becomes loose, and the spring continuously supports the polytetrafluoroethylene sealing ring to continuously contact and seal with the end cover 1 and the cable penetrating spool 2.
The diameter of a third left-end external fillet of the anisotropic corrosion-resistant sealing ring 3 is the same as that of a third right-end external fillet of the anisotropic corrosion-resistant sealing ring 3, when the diameter of the third left-end external fillet of the anisotropic corrosion-resistant sealing ring 3 is too small, the leftmost end of the anisotropic corrosion-resistant sealing ring 3 is too sharp, and the stress of the anisotropic corrosion-resistant sealing ring 3 extruded with the end cover 1 is too large, so that the left end of the anisotropic corrosion-resistant sealing ring 3 is easily subjected to local permanent deformation, and after the permanent deformation occurs, the sealing reliability is reduced, and the resilience capacity is not provided; when the diameter of the excircle corner of the third left end of the heterosexual corrosion-resistant sealing ring 3 is too large, the leftmost end of the heterosexual corrosion-resistant sealing ring 3 is too blunt, the heterosexual corrosion-resistant sealing ring 3 slightly extrudes with the end cover 1, the contact surface is too large, the extrusion stress is too small, and the sealing reliability is reduced. A large number of experiments find that when the diameter of the excircle corner of the third left end of the heterosexual corrosion-resistant sealing ring 3 is 5.1-8.8 mm, the problems can be avoided, the functions can be realized, and the use requirements are met.
In the embodiment, the diameter of the excircle corner of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 5.1mm;
the third left end middle inner circle angular diameter of corrosion-resistant sealing washer 3 of opposite sex is the same with the fourth left end semicircular diameter of opposite sex spring circle 4 with the fourth right-hand member semicircular diameter of opposite sex spring circle 4 with the third right-hand member inside circle angular diameter of corrosion-resistant sealing washer 3 of opposite sex, the third left end middle inner circle angular diameter of corrosion-resistant sealing washer 3 of opposite sex is too little, the opposite sex spring circle 4 is too little to the support contact surface of corrosion-resistant sealing washer 3 of opposite sex, it is too big to produce apart from the stress, the too big condition of local holding power takes place the warpage in corrosion-resistant sealing washer 3 of opposite sex, can not with end cover 1 and the better laminating of cable spool 2 behind the 3 warpage of corrosion-resistant sealing washer of opposite sex, lead to unable sealing. When the inner circular angle diameter of the middle part of the third left end of the opposite sex corrosion-resistant sealing ring 3 is too large, the semicircular diameter of the fourth left end of the opposite sex spring ring 4 is too large, the rigidity of the opposite sex spring ring 4 is too large, the elastic deformation amount generated under the same axial force action is reduced, and the subsequent deformable amount for continuously supporting the opposite sex corrosion-resistant sealing ring 3 is reduced, which is not beneficial to the continuous reliable output supporting action. The amount of creep deformation of the corrosion resistant seal ring 3 which can compensate for the corrosion resistance is reduced, and leakage occurs once the creep deformation is not sufficiently compensated for. A large number of experiments show that when the diameter of the fillet of the third left middle part of the opposite-nature corrosion-resistant sealing ring 3 is 14.2-16.7 mm, the problems can be avoided, the functions can be realized, and the use requirements can be met.
In the embodiment, the diameter of the fillet in the middle of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 14.2mm;
the third middle inner circular corner diameter of the heterosexual corrosion-resistant sealing ring 3 is too small, the wall thickness reduction amount of the middle part of the heterosexual corrosion-resistant sealing ring 3 is too small, the rigidity of the heterosexual corrosion-resistant sealing ring 3 is improved too little, the heterosexual corrosion-resistant sealing ring 3 is provided with a circular corner in the middle to improve the rigidity, the deformable amount is improved, and the heterosexual corrosion-resistant sealing ring can be tightly attached to a contacted mechanical part. If the rigidity is less improved, the amount of deformation is less improved, the degree of close adhesion with the mechanical parts in contact is reduced, and the sealing reliability is lowered. When the third middle inner fillet diameter of the corrosion-resistant sealing ring of opposite sex 3 is too big, the wall thickness reduction at the middle part of the corrosion-resistant sealing ring of opposite sex 3 is too big, and the intensity of the corrosion-resistant sealing ring of opposite sex 3 weakens too seriously, and under the axial force effect, if the corrosion-resistant sealing ring of opposite sex 3's intensity is too low, the corrosion-resistant sealing ring of opposite sex 3 will take place permanent deformation, will not closely laminate with metal parts, lose the leakproofness. Through a large number of experiments, the problems can be avoided when the third middle fillet diameter of the heterosexual corrosion-resistant sealing ring 3 is 11.4-13.1 mm, and the functions can be realized and the use requirements can be met.
In the embodiment, the diameter of a third middle fillet of the heterosexual corrosion-resistant sealing ring 3 is 11.4mm;
when the included angle between the two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 is too small, under the same axial force, the included angle between the two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 is smaller, and the generated radial force is smaller, because the radial force of the two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 is smaller as the included angle between the two V-shaped edges is smaller. Make corrosion-resistant sealing washer of opposite sex 3 too little with end cover 1 and the extrusion force of wearing cable spool 2, it is sealed inadequately, when two limit contained angles of the V-arrangement of the third of corrosion-resistant sealing washer of opposite sex 3 were too big, under the same axial compression volume, the radial movement volume on two limits of the V-arrangement of the third of corrosion-resistant sealing washer of opposite sex 3 was too little, two limits of the V-arrangement of the third of corrosion-resistant sealing washer of opposite sex 3 and adjacent metal part's extrusion laminating volume reduce, because the displacement volume on two limits of the V-arrangement of the third of corrosion-resistant sealing washer of opposite sex 3 diminishes along with two limit contained angles grow of V-arrangement. Too small a fitting amount results in a decrease in sealing reliability. A large number of experiments find that when the included angle between the two V-shaped edges of the third inverted V-shaped part of the corrosion-resistant sealing ring 3 is 123-127 degrees, the problems can be avoided, the functions can be realized, and the use requirement is met.
In this embodiment, the included angle between the two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant seal ring 3 is 123 °;
when the pressure intensity of the lower end face of the pretightening force generating device 5 to the revolution surface of the third straight-line section of the opposite-nature corrosion-resistant sealing ring 3 is too small, the axial force of the opposite-nature corrosion-resistant sealing ring 3 is too small, the radial force and the radial movement size of the V-shaped two sides of the opposite-nature corrosion-resistant sealing ring 3 are too small, and the extrusion fit degree of the opposite-nature corrosion-resistant sealing ring 3 and adjacent metal parts is too small and is not enough for sealing. When the pressure of the lower end surface of the pretightening force generating device 5 on the revolution surface of the third straight-line section of the opposite-nature corrosion-resistant sealing ring 3 is too high, the pressure of each part of the opposite-nature corrosion-resistant sealing ring 3 cannot exceed the strength of the opposite-nature corrosion-resistant sealing ring, otherwise, the opposite-nature corrosion-resistant sealing ring is permanently deformed, the resilience force is lost, and the sealing reliability is reduced. Through a large number of experiments, the problems can be avoided when the pressure of the lower end surface of the pretightening force generating device 5 on the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 1.7-2.3 MPa, the functions are realized, and the use requirements are met.
In the embodiment, the pressure intensity of the lower end surface of the pretightening force generating device 5 facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 1.7MPa;
and processing 20 liquid-phase powder charging warheads, wherein all the liquid-phase powder charging warheads are used for the liquid-phase powder charging warheads, liquid-phase materials are filled in the liquid-phase powder charging warheads, the liquid-phase powder charging warheads are heated to 70 ℃, so that the internal stress of the liquid-phase materials in the liquid-phase powder charging warheads reaches the maximum value of subsequent use, the internal stress is maintained for one month, and 20 warheads are all leaked. The invention proves that the liquid-phase charging warhead can be reliably sealed.
The corrosion-resistant radial cylindrical surface sealing device provided by the invention has the following technical effects:
(1) The invention can solve the sealing problem of the matching contact surface of the radial cylindrical surface of the cable conduit penetrating through the liquid-phase charging warhead and the shell end cover, the diameter of the applicable cable conduit penetrating through the cable conduit is 70.3-71.0 mm, the wall thickness of the cable conduit penetrating through the cable conduit is 4.0-4.5 mm, and the internal stress of the internal liquid-phase fuel is not more than 0.3MPa. The shaft section of the polytetrafluoroethylene sealing ring is designed to be in an inverted V shape, the polytetrafluoroethylene sealing ring expands radially under the action of axial pressure, small axial force can generate multiple times of radial expansion force, and the expanded polytetrafluoroethylene sealing ring is respectively in close contact with the end cover and the cable-penetrating spool to realize sealing. The annular seal groove is opened to the top, polytetrafluoroethylene sealing washer need not change the diameter alright in order to install into annular seal groove, can install smoothly.
(2) The root of the inverted V-shaped polytetrafluoroethylene sealing ring is provided with a fillet, so that the elastic deformation capacity of polytetrafluoroethylene is increased, the deformation amount is improved under the same pressure, the defect of the deformation capacity of the material is made up through the optimization of the structure, the fitting degree of the polytetrafluoroethylene sealing ring and an end cover and a cable wire tube is improved, and the sealing reliability is improved.
(3) The spring coil has been installed to polytetrafluoroethylene sealing washer lower extreme, the spring coil receives axial pressure after, take place axial compression deformation, and the output axial force that the spring coil after the compression can last, give two ascending back-up forces in limit of the shape of falling V-arrangement of polytetrafluoroethylene sealing washer, though the wriggling takes place along with the time for the polytetrafluoroethylene sealing washer, but the back-up force effect of lasting of spring coil is down, the polytetrafluoroethylene sealing washer can keep with the end cover with wear the lasting laminating power of cable spool, keep the extrusion laminating that lasts and seal, the permanence of sealed effect has been guaranteed, the sealing reliability of warhead has been guaranteed.
Example 2:
example 2 differs from example 1 in that:
in the embodiment, the diameter of the excircle corner of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 8.8mm;
in the embodiment, the diameter of the fillet in the middle of the third left end of the anisotropic corrosion-resistant sealing ring 3 is 16.7mm;
in the embodiment, the diameter of a third middle fillet of the heterosexual corrosion-resistant sealing ring 3 is 13.1mm;
in this embodiment, the included angle between the two V-shaped edges of the third inverted V-shape of the anisotropic corrosion-resistant sealing ring 3 is 127 °;
in the embodiment, the pressure intensity of the lower end surface of the pretightening force generating device 5 facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring 3 is 2.3MPa;
and processing 20 liquid-phase powder charging warheads, wherein all the liquid-phase powder charging warheads are used for the liquid-phase powder charging warheads, liquid-phase materials are filled in the liquid-phase powder charging warheads, the liquid-phase powder charging warheads are heated to 70 ℃, so that the internal stress of the liquid-phase materials in the liquid-phase powder charging warheads reaches the maximum value of subsequent use, the internal stress is maintained for one month, and 20 warheads are all leaked. The invention proves that the liquid-phase charging warhead can be reliably sealed.
The corrosion-resistant radial cylindrical surface sealing device provided by the invention has the following technical effects:
(1) The invention can solve the sealing problem of the matching contact surface of the radial cylindrical surface of the cable conduit penetrating through the liquid-phase charging warhead and the shell end cover, the diameter of the applicable cable conduit penetrating through the cable conduit is 70.3-71.0 mm, the wall thickness of the cable conduit penetrating through the cable conduit is 4.0-4.5 mm, and the internal stress of the internal liquid-phase fuel is not more than 0.3MPa. The shaft section of the polytetrafluoroethylene sealing ring is designed to be in an inverted V shape, the polytetrafluoroethylene sealing ring expands radially under the action of axial pressure, small axial force can generate multiple times of radial expansion force, and the expanded polytetrafluoroethylene sealing ring is respectively in close contact with the end cover and the cable-penetrating spool to realize sealing. The annular seal groove is opened to the top, polytetrafluoroethylene sealing washer need not change the diameter alright in order to install into annular seal groove, can install smoothly.
(2) The root of the inverted V-shaped polytetrafluoroethylene sealing ring is provided with a fillet, so that the elastic deformation capacity of polytetrafluoroethylene is increased, the deformation amount is improved under the same pressure, the defect of the deformation capacity of the material is made up through the optimization of the structure, the fitting degree of the polytetrafluoroethylene sealing ring and an end cover and a cable wire tube is improved, and the sealing reliability is improved.
(3) The spring ring has been installed to polytetrafluoroethylene sealing washer lower extreme, the spring ring receives behind the axial pressure, take place axial compression deformation, and the output axial force that the spring ring after the compression can last, give the ascending holding power in two limits of the shape of falling V-arrangement of polytetrafluoroethylene sealing washer, though the wriggling takes place along with the time for the polytetrafluoroethylene sealing washer, but under the holding power effect that lasts of spring ring, the polytetrafluoroethylene sealing washer can keep with the end cover with wear the lasting power of hugging closely of cable spool, the extrusion laminating that keeps lasting is laminated and sealed, the permanence of sealed effect has been guaranteed, the sealing reliability of warhead has been guaranteed.

Claims (3)

1. A corrosion-resistant radial cylindrical surface sealing device comprises an end cover (1) and a cable through pipe (2), and is characterized by further comprising an opposite-nature corrosion-resistant sealing ring (3), an opposite-nature spring ring (4) and a pretightening force generating device (5);
the end cover (1) is in a first circular plate shape, a first circular hole is formed in the first circular plate of the end cover (1), the inner side face of the first circular hole of the end cover (1) is a first inner cylindrical surface, a first annular groove is formed in the upper end of the first inner cylindrical surface of the end cover (1), the upper end face of the first annular groove of the end cover (1) is coplanar with the upper end face of the first circular plate of the end cover (1), the lower end face of the first annular groove of the end cover (1) is a first lower end circular ring face, and the bottom face of the first annular groove of the end cover (1) is a first upper end inner cylindrical surface;
the central axis of a first round hole of the end cover (1) is vertical to the ground, the end cover (1) is an end cover of a liquid-phase charging warhead, and liquid-phase materials are arranged on the inner side of the end cover (1);
the cable passing pipe (2) is in a second circular pipe shape, the second circular pipe passing through the cable passing pipe (2) is a rotary body, the outer side surface of the second circular pipe passing through the cable passing pipe (2) is a second outer cylindrical surface, a second annular groove is formed in the upper end of the second outer cylindrical surface passing through the cable passing pipe (2), the upper end surface of the second annular groove passing through the cable passing pipe (2) is coplanar with the upper end surface of the second circular pipe passing through the cable passing pipe (2), the lower end surface of the second annular groove passing through the cable passing pipe (2) is a second lower end circular ring surface, and the bottom surface of the second annular groove passing through the cable passing pipe (2) is a second upper end outer cylindrical surface;
the inner side of a second circular tube penetrating through the cable spool (2) is used for filling cables of the liquid-phase charge warhead part, liquid-phase materials are arranged on the outer side of the cable spool (2), the axis of a revolving body penetrating through the cable spool (2) coincides with the central axis of a first circular hole of the end cover (1), the upper end of the cable spool (2) is positioned on the inner side of the first circular hole of the end cover (1), a second outer cylindrical surface penetrating through the cable spool (2) is in contact with a first inner cylindrical surface of the end cover (1), the contact surface of the cable spool (2) and the end cover (1) is a radial cylindrical surface, the sealing device is used for sealing the cylindrical contact surface of the cable spool (2) and the end cover (1) so as to ensure that liquid-phase fuel in the liquid-phase charge warhead part cannot leak from the cylindrical contact surface penetrating through the cable spool (2) and the end cover (1), the liquid-phase fuel in the cable warhead part has corrosivity, various rubber materials are all corroded by the liquid-phase fuel, polytetrafluoroethylene materials are not corroded by the liquid-phase fuel, the polytetrafluoroethylene materials, the inner diameter of the second circular tube (2) penetrating through the cable spool (2) is 70.3-71.0 mm, the wall thickness of the second circular ring surface of the second circular cable spool (2), and the lower end of the second circular ring (1) is not more than 0.5 mm, and the lower end of the second circular ring (2) of the cable spool (1);
the special corrosion-resistant sealing ring (3) is in a revolving body shape, the special corrosion-resistant sealing ring (3) is made of polytetrafluoroethylene, the axial section of the revolving body of the special corrosion-resistant sealing ring (3) is in a third inverted V shape, a V-shaped opening of the third inverted V shape of the special corrosion-resistant sealing ring (3) faces downwards, two V-shaped edges of the third inverted V shape of the special corrosion-resistant sealing ring (3) are located at the lower end, the middle intersection point of the two V-shaped edges of the third inverted V shape of the special corrosion-resistant sealing ring (3) is located at the upper end, the left lower end of the edge of the third inverted V shape of the special corrosion-resistant sealing ring (3) located at the left side of the V shape is provided with a third left end external fillet, the right lower end of the edge of the third inverted V shape of the special corrosion-resistant sealing ring (3) located at the right side of the V shape is provided with a third right end external fillet, the middle lower end of the middle part of the edge of the third inverted V-shaped edge of the third inverted V shape of the special corrosion-resistant sealing ring (3) located at the left side is provided with a third left end internal fillet, the middle lower end of the middle two V-shaped edges of the third inverted V-shaped sealing ring (3) is provided with a third inverted V-shaped intersection point, and two corrosion-resistant sealing ring at the middle external fillet of the middle two V-shaped edges of the middle of the third inverted V-shaped edges of the third inverted V-shaped sealing ring (3) of the inverted V-shaped edges of the inverted V-shaped sealing ring (3) are provided with a third inverted V-shaped corrosion-resistant sealing ring;
the revolution body axis of the anisotropic corrosion-resistant sealing ring (3) is coincided with the revolution body axis of the cable passing line pipe (2), the anisotropic corrosion-resistant sealing ring (3) is positioned on the inner side of a first annular groove of the end cover (1), the anisotropic corrosion-resistant sealing ring (3) is positioned on the outer side of a second annular groove of the cable passing line pipe (2), the revolution surface of the excircle corner of the third left end of the anisotropic corrosion-resistant sealing ring (3) is contacted with the inner cylindrical surface of the first upper end of the end cover (1), and the revolution surface of the excircle corner of the third right end of the anisotropic corrosion-resistant sealing ring (3) is contacted with the outer cylindrical surface of the second upper end of the cable passing line pipe (2);
the special-shaped spring ring (4) is a revolving body, the special-shaped spring ring (4) is made of spring steel, the axial section of the revolving body of the special-shaped spring ring (4) is in a fourth semicircle shape, the fourth semicircle opening of the special-shaped spring ring (4) is upward, the fourth semicircle left end of the special-shaped spring ring (4) is connected with the fourth left end semicircle, the fourth left end semicircle opening of the special-shaped spring ring (4) is downward, the fourth semicircle right end of the special-shaped spring ring (4) is connected with the fourth right end semicircle, and the fourth right end semicircle opening of the special-shaped spring ring (4) is downward;
the revolving body axis of the opposite sex spring ring (4) coincides with the revolving body axis of the cable passing line pipe (2), the opposite sex spring ring (4) is positioned at the lower end of the opposite sex corrosion-resistant sealing ring (3), the opposite sex spring ring (4) is positioned at the inner side of a first annular groove of the end cover (1), the opposite sex spring ring (4) is positioned at the outer side of a second annular groove of the cable passing line pipe (2), the lower end of a fourth semicircular revolving surface of the opposite sex spring ring (4) is contacted with the joint of a first lower end circular ring surface of the end cover (1) and a second lower end circular ring surface of the cable passing line pipe (2), the upper end of a fourth left end semicircular revolving surface of the opposite sex spring ring (4) is contacted with a revolving surface of an inner angle at the middle part of a third left end of the opposite sex corrosion-resistant sealing ring (3), and the upper end of a fourth right end semicircular revolving surface of the opposite sex spring ring (4) is contacted with a revolving surface of an inner angle at the middle part of a third right end of the opposite sex corrosion-resistant sealing ring (3);
the shape of the pretightening force generating device (5) is a fifth torus, the fifth torus of the pretightening force generating device (5) is a revolving body, the axial cross section of the fifth torus of the pretightening force generating device (5) is rectangular, a fifth outer flange is arranged at the upper end of an outer cylindrical surface of the fifth torus of the pretightening force generating device (5), and a fifth inner flange is arranged at the upper end of an inner cylindrical surface of the fifth torus of the pretightening force generating device (5);
the axis of a revolving body of the pretightening force generating device (5) is superposed with the axis of a revolving body of the cable penetrating spool (2), the pretightening force generating device (5) is positioned at the upper end of the opposite corrosion-resistant sealing ring (3), the pretightening force generating device (5) is positioned at the inner side of a first annular groove of the end cover (1), the pretightening force generating device (5) is positioned at the outer side of a second annular groove of the cable penetrating spool (2), a fifth outer flange of the pretightening force generating device (5) is connected with the first circular plate of the end cover (1) through screws, the lower end face of a fifth outer flange of the pretightening force generating device (5) is contacted with the upper end face of the first circular plate of the end cover (1), a fifth inner flange of the pretightening force generating device (5) is connected with a second circular pipe of the cable penetrating spool (2) through screws, the lower end face of a fifth inner flange of the pretightening force generating device (5) is contacted with the upper end face of a second circular pipe of the cable penetrating spool (2), and the lower end face of the pretightening force generating device (5) is contacted with the rotary face of a third linear section of the opposite corrosion-resistant sealing ring (3);
the diameter of a third left-end excircle corner of the anisotropic corrosion-resistant sealing ring (3) is the same as that of a third right-end excircle corner of the anisotropic corrosion-resistant sealing ring (3), and the diameter of the third left-end excircle corner of the anisotropic corrosion-resistant sealing ring (3) is 5.1-8.8 mm;
the diameter of a third middle fillet of the opposite corrosion-resistant sealing ring (3) is 11.4-13.1 mm;
the diameter of the inner circle angle in the middle of the third left end of the opposite-nature corrosion-resistant sealing ring (3), the diameter of the inner circle angle in the middle of the third right end of the opposite-nature corrosion-resistant sealing ring (3), the diameter of the semicircular diameter at the fourth left end of the opposite-nature spring ring (4) and the diameter of the semicircular diameter at the fourth right end of the opposite-nature spring ring (4) are the same, and the diameter of the inner circle angle in the middle of the third left end of the opposite-nature corrosion-resistant sealing ring (3) is 14.2-16.7 mm;
the included angle of two V-shaped edges of the third inverted V-shaped of the anisotropic corrosion-resistant sealing ring (3) is 123-127 degrees;
the pressure intensity of the lower end surface of the pretightening force generating device (5) facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring (3) is 1.7-2.3 MPa;
the corrosion-resistant radial cylindrical surface sealing device comprises the following steps:
step 1: assembling the end cover (1) and the cable-through conduit (2);
step 2: assembling the special-shaped spring ring (4) with the end cover (1);
and step 3: assembling the special-shaped corrosion-resistant sealing ring (3) and the special-shaped spring ring (4);
and 4, step 4: the pre-tightening force generating device (5) is respectively assembled with the end cover (1) and the cable-through line pipe (2), the lower end face of the pre-tightening force generating device (5) extrudes the revolution surface of a third straight-line section of the anisotropic corrosion-resistant sealing ring (3), the included angle between two V-shaped side angles of a third inverted V-shape is increased under the action of axial force, the revolution surface of a third left-end external corner of the anisotropic corrosion-resistant sealing ring (3) extrudes the inner cylindrical surface of a first upper end of the end cover (1) to realize sealing, the revolution surface of a third right-end external corner of the anisotropic corrosion-resistant sealing ring (3) extrudes the outer cylindrical surface of a second upper end of the cable-through line pipe (2) to realize sealing, the anisotropic corrosion-resistant sealing ring (3) extrudes the anisotropic spring ring (4), the upper end of a fourth left-end semicircular revolution surface of the anisotropic spring ring (4) contacts with the revolution surface of a third left-end middle inner cylindrical surface of the anisotropic corrosion-resistant sealing ring (3) to continuously output supporting force, and the upper end of the fourth semicircular revolution surface of the anisotropic spring ring (4) contacts with the third right-end middle inner cylindrical surface of the anisotropic corrosion-resistant sealing ring (3) to continuously output supporting force.
2. The corrosion-resistant radial cylinder face seal device according to claim 1, wherein the third left-end external fillet diameter of the anisotropic corrosion-resistant seal ring (3) is 5.1mm;
the diameter of an inner fillet at the middle part of the third left end of the anisotropic corrosion-resistant sealing ring (3) is 11.4mm;
the diameter of a third middle fillet of the heterosexual corrosion-resistant sealing ring (3) is 14.2mm;
the included angle of two V-shaped edges of a third inverted V-shape of the anisotropic corrosion-resistant sealing ring (3) is 123 degrees;
the pressure of the lower end surface of the pretightening force generating device (5) facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring (3) is 1.7MPa.
3. The corrosion-resistant radial cylinder face seal device according to claim 1, wherein the third left-end external fillet diameter of the anisotropic corrosion-resistant seal ring (3) is 8.8mm;
the diameter of an inner fillet at the middle part of the third left end of the anisotropic corrosion-resistant sealing ring (3) is 13.1mm;
the diameter of a third middle fillet of the opposite corrosion-resistant sealing ring (3) is 16.7mm;
the included angle of two V-shaped edges of a third inverted V-shape of the anisotropic corrosion-resistant sealing ring (3) is 127 degrees;
the pressure of the lower end surface of the pretightening force generating device (5) facing the revolution surface of the third straight-line section of the opposite corrosion-resistant sealing ring (3) is 2.3MPa.
CN202110042745.4A 2021-01-13 2021-01-13 Corrosion-resistant radial cylindrical surface sealing device Active CN112879565B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345078A (en) * 1966-09-19 1967-10-03 Goodrich Co B F Seal assembly
FR2726879B1 (en) * 1994-11-10 1997-01-31 Europ Propulsion STATIC METAL V-SEAL AND SEALED ASSEMBLY
CN2498406Y (en) * 2001-05-21 2002-07-03 楚建唐 Sealer for control of air stream flow direction
CN201415081Y (en) * 2009-03-24 2010-03-03 广州赛爱环境保护技术开发有限公司 Seal device for cylindrical water filter
FR2981423B1 (en) * 2011-10-14 2013-12-06 Snecma ARRANGEMENT OF A CONICAL CONTACT SEAL SEAL IN A TRAPEZOIDAL GRIP
TWI723629B (en) * 2018-11-16 2021-04-01 美商泰科防火產品有限合夥公司 Systems and methods of quick install gasket
CN110848387B (en) * 2019-11-22 2022-07-05 江门市鑫辉特种密封科技有限公司 Sealing mechanism for high-speed wire rolling mill

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