CN114459707B - Airtight detection device of nacelle gyration unit - Google Patents
Airtight detection device of nacelle gyration unit Download PDFInfo
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- CN114459707B CN114459707B CN202210001293.XA CN202210001293A CN114459707B CN 114459707 B CN114459707 B CN 114459707B CN 202210001293 A CN202210001293 A CN 202210001293A CN 114459707 B CN114459707 B CN 114459707B
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- 238000001514 detection method Methods 0.000 title claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 65
- 238000003825 pressing Methods 0.000 claims abstract description 26
- 230000007704 transition Effects 0.000 claims abstract description 23
- 238000009434 installation Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000012812 sealant material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3209—Details, e.g. container closure devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Rolling Contact Bearings (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses an airtight detection device for a nacelle revolving unit, which consists of a revolving assembly, a sealing assembly and a transition interface assembly, wherein the revolving assembly is in modularized design, the revolving assembly comprises a slewing bearing and a pressing plate, the sealing assembly comprises a lip sealing ring, a lip sealing upper partition ring, a lip sealing lower partition ring and an O-shaped sealing ring, and the transition interface assembly comprises an outer side C-shaped tool, an inner side C-shaped tool, a three-way pipe joint, a ball valve, a barometer and an air inlet pipe. The invention realizes the dynamic airtight detection function of the nacelle revolving unit in the revolving process, greatly improves the accuracy of airtight detection, and reduces the workload and detection time of conventional multipoint static detection. The air tightness detection device with the novel structure saves labor cost and time cost in an air tightness detection link, and improves air tightness detection efficiency and accuracy.
Description
Technical Field
The invention belongs to the field of product sealing performance detection, and particularly relates to an airtight detection device for a nacelle rotary unit.
Background
The nacelle rotary unit is provided with a lip-shaped sealing device on a rotary support, and an O-shaped sealing ring is arranged on a rotary unit mounting seat, so that the function of the lip-shaped sealing ring is to prevent outside sea water from entering the nacelle propulsion unit or the nacelle interior, and further cause short-circuit faults of equipment. Therefore, the tightness detection of the nacelle turning unit is particularly important.
At present, the conventional method for detecting the tightness of the nacelle revolving unit is to seal and connect a cover plate with a stator and a rotor of a revolving support bearing of the nacelle revolving unit through an O-shaped ring and a bolt by customizing a sealing cover plate tool, so that a closed cavity formed by a lip seal, a revolving support, the O-shaped sealing ring and the cover plate is formed, compressed gas with specified pressure is injected inwards through a gas injection hole of the tool cover plate, the change of the air pressure of the closed cavity in specified time is observed, after the test is finished, the cover plate is installed again for detecting the revolving unit rotating at a corresponding angle, and the test result of multiple points is used as a tightness detection criterion of the nacelle revolving unit.
The sealing cover plate tool is adopted to detect the sealing performance of the nacelle revolving unit, and firstly, the sealing cover plate tool can only detect the lip seal static sealing performance of the nacelle revolving unit and can not detect the static sealing performance between the revolving unit mounting seat and the hull mounting surface; secondly, the tightness detection by adopting the sealing cover plate tool cannot be carried out on each working position of the nacelle rotation unit, and the risk of static detection qualification and dynamic detection failure exists, so that the nacelle has the hidden trouble of leakage during normal steering operation, and the safety of equipment personnel and equipment on a ship is endangered.
Disclosure of Invention
Aiming at the risks existing in the conventional sealing cover plate tool for detecting the airtight link of the nacelle rotary unit, the invention provides a novel airtight detection device.
The technical scheme adopted for solving the technical problems is as follows: the device comprises a rotary component rotating along with the rotary unit of the nacelle, a sealing component connected with the rotary component to realize sealing, and a transition interface component arranged outside the sealing component to realize connection with the rotary units of the nacelle of different models and form an airtight cavity, wherein the rotary component realizes the rotation function of the rotary unit of the nacelle of the airtight detection device, the sealing component realizes the sealing function of the detection device, the transition interface component realizes the connection of the airtight detection device with the rotary units of the nacelle of different models and forms the function of the airtight cavity, the rotary component consists of an annular metal structure pressing plate and a rotary support bearing fixed on the pressing plate through bolts, the upper surface of an inner rotor of the rotary support bearing is provided with an O-shaped ring groove, the upper surface of an outer stator of the rotary support bearing is provided with an O-shaped ring groove for installing the O-shaped sealing ring, the sealing assembly consists of an upper lip seal spacing ring which is fixed by pressing through a pressing plate and a lip sealing ring which is installed in the lip sealing mounting groove of the slewing bearing by pressing through an upper lip seal spacing ring and a lower lip seal spacing ring, the transition interface assembly comprises an outer side C-shaped tool and an inner side C-shaped tool, an upper transverse plate and a lower transverse plate which extend vertically inwards of the outer side C-shaped tool are respectively and mechanically connected with a nacelle slewing unit mounting seat and the pressing plate through bolts, an upper transverse plate and a lower transverse plate which extend vertically inwards of the inner side C-shaped tool are respectively and mechanically connected with a nacelle slewing unit rotor and the slewing bearing through bolts, an O-shaped sealing ring on the nacelle slewing unit mounting seat is utilized to realize the sealing function of the outer side C-shaped tool and the nacelle slewing unit, a threaded through hole is formed in the side surface of the outer side C-shaped tool, the three-way pipe joint is installed in a mode of winding sealant and raw material tape, the three-way pipe joint is connected with a barometer and a ball valve respectively, the other end of the ball valve is connected with an air inlet pipe, so that a closed cavity consisting of a nacelle revolving unit, an inner side C-shaped tool, a slewing bearing, a lip-shaped sealing ring, a pressing plate and an outer side C-shaped tool is formed, and rated compressed air is injected into the air inlet pipe through opening the ball valve to enable the nacelle revolving unit to rotate, so that the air tightness of the nacelle revolving unit is dynamically detected.
The air tightness detection device for the nacelle revolving unit is characterized in that the height of the outer C-shaped tool is larger than that of the inner C-shaped tool, and the outer C-shaped tool and the inner C-shaped tool are oppositely installed, namely the direction of a C-shaped opening of the inner C-shaped tool is the direction facing away from the center of the equipment, and the direction of the C-shaped opening of the outer C-shaped tool is the direction pointing to the center of the equipment.
According to the airtight detection device for the nacelle rotary unit, the O-shaped ring groove is formed in the inner side C-shaped upper transverse plate of the nacelle rotary unit, the sealing function between the inner side C-shaped upper transverse plate and the nacelle rotary unit rotor and the slewing bearing is achieved through the O-shaped sealing ring, and the sealing function between the inner side C-shaped lower transverse plate and the slewing bearing is achieved through the O-shaped sealing ring.
According to the air tightness detection device for the nacelle rotary unit, the upper surface of the pressing plate is sealed with the outer C-shaped tool through the O-shaped sealing ring arranged in the ring groove, and the lower surface of the pressing plate is sealed with the outer rotor of the slewing bearing through the O-shaped sealing ring arranged in the ring groove.
Further, the O-shaped sealing rings are multiple.
According to the air tightness detection device for the nacelle rotary unit, a plurality of equidistant threaded blind holes are formed in the upper surfaces of the inner rotor and the outer stator of the rotary support bearing, a plurality of equidistant installation through holes are formed in the upper surface of the pressing plate, and the number and the positions of the installation through holes correspond to those of the blind holes.
The beneficial effects of the invention are as follows:
The position of the rotor of the nacelle rotary unit is random, the situation that the bolt hole of the detection device cannot be aligned with the bolt hole of the rotary unit can occur when the conventional cover plate tool is adopted for airtight detection, and detection personnel are required to adjust the position of the rotor of the rotary unit to align the rotor.
The airtight detection device can rotate by 360 degrees according to the nacelle revolving unit, realizes a dynamic airtight detection function under the revolving working condition of the revolving unit, has universality in the airtight detection of the nacelle revolving unit, namely, the revolving assembly and the sealing assembly are universal assemblies, and can realize the airtight detection function of various nacelle revolving units only by selecting matched transition interface assemblies according to the interface sizes of different nacelle revolving units. According to the invention, the airtight detection of the nacelle revolving unit is improved from the traditional multipoint static detection to the dynamic detection which is closer to the real situation, and the combined modular design is adopted, so that the airtight detection requirements of nacelle revolving units of different types can be realized by replacing the interface component, and the detection accuracy is higher, the universality is stronger and the economy is better.
According to the invention, dynamic airtight detection of the nacelle rotary unit is realized, namely, airtight detection of the nacelle rotary unit under the rotary working condition is realized, the actual working condition of the nacelle rotary unit is fully simulated, on one hand, the airtight function of the rotary unit is effectively verified, the accuracy of airtight detection is greatly improved, on the other hand, airtight detection of the nacelle rotary unit in one detection time period is realized, static multi-point repeated detection of the nacelle rotary unit by adopting a cover plate tool is avoided, and the time cost and the workload of an airtight detection link are effectively reduced.
The invention adopts the modularized design concept, fully considers the universality of the airtight detection device in the design, can finish the airtight detection by only adjusting the transition interface component aiming at the airtight detection of different nacelle rotary units, can be used for the other components, greatly reduces the manufacturing cost and the airtight detection cost of the detection device, and has good economy.
Drawings
FIGS. 1 and 2 are schematic views of the overall structure of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention;
FIG. 4 is a schematic view of the installation of a lip seal of the present invention;
FIG. 5 is a schematic cross-sectional view of a mounting interface of the swivel assembly and transition interface assembly of the present invention;
FIG. 6 is a top view of the swivel assembly of the invention;
FIG. 7 is a schematic cross-sectional view of the mounting interface of the transition interface assembly and pod swivel unit of the present invention;
FIG. 8 is a top view of a transition interface assembly of the present invention;
Fig. 9 is a schematic diagram of the working principle of the present invention.
The reference numerals are as follows: 1-slewing assembly, 1-slewing bearing and 1-2-pressing plate; 2-sealing component, 2-1-lip sealing ring, 2-lip seal upper spacing ring, 2-3-lip seal lower spacing ring and 2-4-O-shaped sealing ring; 3-transition interface assembly, 3-1-outside C type frock, 3-2-inboard C type frock, 3-tee bend formula coupling, 3-4-ball valve, 3-5-barometer, 3-6-intake pipe.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific examples.
Fig. 1, fig. 2 and fig. 3 are a schematic overall structure and a schematic cross-sectional view of the airtight detecting device of the present invention. The detection device performs modularized structural separation on the device according to functional requirements. The airtight detecting device is functionally divided into a swivel assembly 1, a seal assembly 2 and a transition interface assembly 3. The rotary assembly 1 realizes the rotary function of the detection device following the nacelle rotary unit, the sealing assembly 2 realizes the dynamic sealing function and the static sealing function of the detection device, and the transition interface assembly 3 realizes the function of connecting the airtight detection device with nacelle rotary units of different models and forming an airtight cavity. The revolving assembly 1 and the sealing assembly 2 have the characteristic of universality, and the transition interface assembly 3 can be processed according to interfaces of pod revolving units of different types, so that the airtight detection function of the pod revolving units of different types is realized. The rotary assembly 1 is connected with the transition interface assembly 3 by bolts, the transition interface assembly 3 is also connected with the nacelle rotary unit by bolts, the joints among the rotary assembly 1, the transition interface assembly 3 and the nacelle rotary unit are all sealed by O-shaped sealing rings 2-4, the lip-shaped sealing rings 2-1 are arranged in the rotary assembly to realize the dynamic sealing function of the rotary assembly, and an annular sealing cavity with the inner circle and the outer circle capable of rotating relatively is formed in the structural form. The airtight detection of the nacelle rotary unit under the rotary working condition can be realized, on one hand, the workload and the detection time of the traditional static detection are reduced, on the other hand, the rotary working condition of the rotary unit is simulated, and the accuracy of the tightness detection is improved.
Fig. 4 is a schematic view of the installation of the lip seal 2-1 of the present invention. The upper half part of the outer side surface of the inner circle rotor of the slewing bearing 1-1 is subjected to surface hardening and smoothing treatment, the lip contact requirement of the lip seal ring 2-1 is met, a lip seal ring mounting groove is processed on the inner side of the outer circle stator of the slewing bearing 1-1, a lip seal lower spacing ring 2-3, the lip seal ring 2-1 and a lip seal upper spacing ring 2-2 are placed in the mounting groove in sequence, and the lip seal lower spacing ring 2-3, the lip seal ring 2-1 and the lip seal upper spacing ring 2-2 are fixed by a pressing plate 1-2 in an extrusion mode. The pressing plate 1-2 is fixedly connected with the outer circle stator of the slewing bearing 1-1 through bolts, an O-shaped ring groove is formed in the upper surface of the outer circle stator of the slewing bearing 1-1, and the surface sealing of the pressing plate 1-2 and the slewing bearing 1-1 is realized through placing the O-shaped sealing ring 2-4.
Fig. 5 and 6 are schematic sectional views of installation interfaces of the swing assembly 1 and the transition interface assembly 3 and a top view of the swing assembly 2 according to the present invention. The outer side C-shaped tool 3-1 and the inner side C-shaped tool 3-2 in the transition interface assembly 3 are processed in a steel plate welding mode. The upper surface of the pressing plate 1-2 is provided with a bolt blind hole and an O-shaped ring groove, the lower transverse plate of the outer C-shaped tool 3-1 is provided with a bolt through hole according to the size and the position of the bolt blind hole of the pressing plate 1-2, and the outer C-shaped tool 3-1 is sealed and connected with the pressing plate 1-2 through an O-shaped sealing ring and a bolt. The upper surface of the inner circle rotor of the slewing bearing 1-1 is provided with a bolt blind hole and an O-shaped ring groove, the lower transverse plate of the inner side C-shaped tool 3-2 is provided with a bolt through hole according to the distribution of the bolt blind holes of the slewing bearing 1-1, and the inner side C-shaped tool 3-2 is sealed and connected with the bolt through the O-shaped ring 2-4 and the slewing bearing 1-1.
Fig. 7 and 8 are a schematic cross-sectional view of the transition interface assembly 3 and nacelle turning unit installation interface of the present invention and a top view of the transition interface assembly 3, respectively. The inner side C-shaped tool 3-2 is provided with a transverse plate for processing a bolt through hole and an O-shaped ring groove according to the size of a rotary bearing rotor of the nacelle rotary unit and the size and the position of a bolt hole. The inner side C-shaped tool 3-2 is sealed and connected with a rotary bearing rotor of the nacelle rotary unit through an O-shaped sealing ring 2-4 and bolts. The transverse plate on the outer C-shaped tooling plate 3-1 adopts a steel plate with the thickness larger than 40mm, and a blind hole and an O-shaped ring groove are processed according to the size and the position of the bolt hole of the nacelle revolving unit mounting base. The outer side C-shaped tool 3-1 is sealed and connected with the nacelle revolving unit mounting seat through the O-shaped sealing ring 2-4 and the bolts.
Fig. 9 is a schematic diagram of the working principle of the present invention. The transition interface assembly 3 is in sealing connection with the nacelle turning unit and the turning assembly 1, respectively. The nacelle revolving unit, the outer side C-shaped tool 3-1, the pressing plate 1-2, the slewing bearing 1-1, the lip-shaped sealing ring 2-1 and the inner side C-shaped tool 3-2 form a sealing cavity capable of relatively moving, the ball valve 3-4 is opened to introduce high-pressure gas to the air inlet pipe 3-6 to rated pressure, the ball valve 3-4 is closed to record the upper degree of the pressure gauge 3-5, the rudder motor on the nacelle revolving unit is driven, the nacelle revolving unit drives the inner side C-shaped tool 3-2 and the slewing bearing 1-1 to rotate, the pressure gauge reading change in a specified time is recorded, and therefore whether the air tightness of the nacelle revolving unit is qualified is judged.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and scope of the present invention.
Claims (6)
1. An airtight detection device of nacelle gyration unit, characterized by: the device comprises a revolving assembly (1) which rotates along with a nacelle revolving unit, a sealing assembly (2) connected with the revolving assembly (1) and a transition interface assembly (3) arranged outside the sealing assembly (2), wherein the revolving assembly (1) consists of an annular metal structure pressing plate (1-2) and a revolving support bearing (1-1) fixed on the pressing plate (1-2), an O-shaped sealing ring (2-4) is respectively arranged on the upper surfaces of an inner rotor and an outer stator of the revolving support bearing (1-1) through ring grooves, a sealing installation groove is arranged on the inner side of the outer stator of the revolving support bearing (1-1), the sealing assembly (2) consists of a lip seal lower spacing ring (2-3) arranged in the sealing installation groove, a lip seal upper spacing ring (2-2) for supporting the pressing plate (1-2) and a lip seal ring (2-1) fixed between the lip seal lower spacing ring (2-3) and the lip seal upper spacing ring (2-2), the transition interface assembly (3) consists of a C1-3 connected with the pressing plate (1-2) and a die-set on the inner side of the revolving support bearing (1-1), the outside C-shaped tool (3-1) is respectively connected with the barometer (3-5) and the ball valve (3-4) through the three-way pipe joint (3-3), and the other end of the ball valve (3-4) is connected with the air inlet pipe (3-6).
2. The nacelle turning unit tightness detection device according to claim 1, wherein the outer C-shaped tooling (3-1) is higher than the inner C-shaped tooling (3-2) and is mounted opposite to each other.
3. A nacelle turning unit tightness detection device according to claim 2, characterized in that said inner C-shaped tooling (3-2) is sealed with the slewing bearing (1-1) by means of an upper cross-plate mounted O-ring (2-4) extending vertically inwards from the top of the side wall; the inner side C-shaped tool (3-2) is sealed with the slewing bearing (1-1) through an O-shaped sealing ring (2-4) arranged on a lower transverse plate extending vertically inwards from the top of the side wall.
4. A nacelle turning unit airtight detection apparatus according to claim 3, wherein the upper surface of the pressing plate (1-2) is sealed with the outer C-shaped tool (3-1) by installing an O-ring (2-4) in a ring groove, and the lower surface of the pressing plate (1-2) is sealed with the outer rotor of the slewing bearing (1-1) by installing an O-ring (2-4) in a ring groove.
5. A nacelle turning unit tightness detection device according to claim 1 or 2 or 3 or 4, characterized in that there are a plurality of O-rings (2-4).
6. The air tightness detection device for the nacelle rotary unit according to claim 5 is characterized in that a plurality of equidistant threaded blind holes are formed in the upper surfaces of the inner rotor and the outer stator of the slewing bearing (1-1), a plurality of equidistant mounting through holes are formed in the upper surface of the pressing plate (1-2), and the number and the positions of the mounting through holes correspond to those of the blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001293.XA CN114459707B (en) | 2022-01-04 | 2022-01-04 | Airtight detection device of nacelle gyration unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210001293.XA CN114459707B (en) | 2022-01-04 | 2022-01-04 | Airtight detection device of nacelle gyration unit |
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| CN114459707A CN114459707A (en) | 2022-05-10 |
| CN114459707B true CN114459707B (en) | 2024-06-14 |
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| CN202210001293.XA Active CN114459707B (en) | 2022-01-04 | 2022-01-04 | Airtight detection device of nacelle gyration unit |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186625A (en) * | 2019-06-21 | 2019-08-30 | 中铁工程服务有限公司 | Center steering body medium channel sealing property detection device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1010915A3 (en) * | 1997-02-12 | 1999-03-02 | Atlas Copco Airpower Nv | DEVICE FOR SEALING A rotor shaft AND SCREW COMPRESSOR PROVIDED WITH SUCH DEVICE. |
| CN203231867U (en) * | 2012-03-08 | 2013-10-09 | 马鞍山方圆回转支承股份有限公司 | Sealing performance detection device for slewing bearings |
| FR3059420B1 (en) * | 2016-11-30 | 2018-11-23 | Safran Aircraft Engines | DEVICE FOR IMPACT MEASUREMENT OF THE RADIAL PLAY OF A BRUSH SEAL AROUND A ROTOR |
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2022
- 2022-01-04 CN CN202210001293.XA patent/CN114459707B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186625A (en) * | 2019-06-21 | 2019-08-30 | 中铁工程服务有限公司 | Center steering body medium channel sealing property detection device |
Non-Patent Citations (1)
| Title |
|---|
| 基于有限元的O形密封圈在三角区域的密封性能研究;谢峰;杨高;黄振华;;机床与液压;20190528(10);全文 * |
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