CN114151199A - Oil discharge device for casing - Google Patents
Oil discharge device for casing Download PDFInfo
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- CN114151199A CN114151199A CN202111222233.2A CN202111222233A CN114151199A CN 114151199 A CN114151199 A CN 114151199A CN 202111222233 A CN202111222233 A CN 202111222233A CN 114151199 A CN114151199 A CN 114151199A
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- Prior art keywords
- oil
- plunger
- adjusting rod
- mounting
- casing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
- F02C9/36—Control of fuel supply characterised by returning of fuel to sump
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lift Valve (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an oil discharging device for a casing, belongs to the technical field of oil discharging equipment in the casing, and solves the technical problem that high-temperature fuel oil in the casing cannot be discharged when an engine stops working by a product in the prior art. Cartridge receiver oil discharge device is applicable to the discharge of cartridge receiver oil among the aeroengine, its characterized in that, including install mount pad (1) on the cartridge receiver with valve casing (2) that mount pad (1) is connected, valve casing (2) set up and install the oil extraction subassembly with hollow structure, mount pad (1) internal surface is provided with sump oil tank (14) and top surface and sets up first inlet port (12), when engine work or stop, seals the gas and avoids the stator of high temperature fuel ablation turbine to the cartridge receiver. The engine case is used for improving the service performance of the engine and discharging residual high-temperature fuel oil of the engine case.
Description
Technical Field
The invention belongs to the technical field of oil discharging equipment in a casing, and particularly relates to an oil discharging device of the casing.
Background
The fuel oil is an important component of the aero-engine for maintaining the working cycle, chemical energy of the fuel is converted into gas heat energy through mixed combustion with air, a rear turbine can be driven to do work, or exhaust temperature is greatly increased, and engine thrust is increased. The functions are usually realized by using a constant pressure valve, for example, the valve and an elastic element are arranged in a valve body with holes at two ends, and the opening and closing of the valve are controlled by balancing the pressure in a casing and the elastic force of the elastic element, but the valve body of the common constant pressure valve only has one inner cavity, the movement of the valve and the flowing of fuel oil are both in the cavity, which brings a problem that a small amount of fuel oil is easily accumulated in a contact gap between the valve and the cavity, when an engine works, the temperature of air in the casing is higher than 600 ℃, the fuel oil is easily subjected to carbon deposition or coking in a high-temperature environment, the sliding resistance of the contact surface between the valve and the cavity is increased, even clamping stagnation is generated, the originally set opening and closing pressure cannot be maintained after long-term use, and the fuel oil cannot be discharged in time, or the fuel oil cannot be closed in time in a thermal state.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a cartridge oil discharge device, which solves the technical problem that products in the prior art can not discharge high-temperature fuel oil in a cartridge with high reliability after long-term use when an engine stops working. The technical scheme of the scheme has a plurality of technical beneficial effects, which are described as follows:
the oil discharge device for the cartridge receiver comprises a mounting seat mounted on the cartridge receiver and a valve shell connected with the mounting seat, wherein the valve shell is arranged in a hollow structure and is provided with an oil discharge assembly, the inner surface of the mounting seat is provided with an oil collecting groove, the top surface of the mounting seat is provided with a first oil inlet hole, and the first oil inlet hole is arranged on the top surface of the mounting seat,
when the engine works, fuel oil is fully combusted, the pressure in the engine case is increased, the oil discharge assembly can be driven to seal the valve shell, and the engine case is sealed;
when the engine stops working, the pressure in the engine case is reduced, the oil discharge assembly can be driven to discharge high-temperature fuel oil entering the oil collecting groove through the first oil inlet, and the guide vane of the turbine is prevented from being ablated by the high-temperature fuel oil.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
when the engine works, fuel oil is fully combusted and the pressure in the engine case is increased through the arrangement of the oil discharge assembly, the oil discharge assembly can be driven to seal the valve shell, and the engine case is sealed;
when the engine stops working, the pressure in the engine case is reduced, the oil discharge assembly can be driven to discharge high-temperature fuel oil entering the oil collecting groove through the first oil inlet, and the guide vane of the turbine is prevented from being ablated by the high-temperature fuel oil.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an overall assembly view of the present invention;
FIG. 2 is a schematic view of the mounting base of the present invention;
FIG. 3 is a front cross-sectional view of the shutter housing;
FIG. 4 is a cross-sectional view of the plunger;
FIG. 5 is a front cross-sectional view of the adjustment lever;
FIG. 6 is a schematic view of the locking plate;
wherein, 1, mounting seat; 12. a first oil inlet hole; 14. an oil sump; 2. a shutter housing; 22. a collar mounting groove; 24. a second oil inlet hole; 25. a second sealing cone; 26. installing edges; 28. the adjusting rod is provided with threads; 29. an adjusting rod mounting surface; 3. a collar; 4. a plunger; 41. an upper end surface; 45. a first sealing cone; 5. a spring; 6. adjusting a rod; 61. a limiting boss; 62. an elastic mounting surface; 7. a gasket; 8. a locking plate; 81. an anti-rotation lug; 82. a protrusion; 9. and a nut.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that aspects may be practiced without these specific details. In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The fuel in the engine is atomized by the nozzle and then combusted, in the working process, the fuel is fully combusted, the pressure in the engine case is high, and the sealing performance is good. The purpose of the scheme is how to discharge the high-temperature oil during the stopping process of the engine.
The oil discharging device for the casing shown in fig. 1 and 2 is suitable for discharging casing oil in an aircraft engine, and comprises a valve shell 2, wherein a mounting seat 1 mounted on the casing is connected with the mounting seat 1, the valve shell 2 is arranged in a hollow structure and is provided with an oil discharging assembly, an oil collecting groove 14 is arranged on the inner surface of the mounting seat 1, a first oil inlet hole 12 is arranged on the top surface of the mounting seat 1, and the oil discharging assembly, for example, comprises a plunger 4 movably mounted in the valve shell 2, wherein:
when the engine works, fuel oil is fully combusted, the pressure in the engine case is increased, the oil discharge assembly can be driven to seal the valve shell 2, the engine case is sealed, and the normal working efficiency of the engine is ensured;
when the engine stops working, the pressure in the casing is gradually reduced, the oil discharge assembly can be driven to discharge high-temperature fuel oil entering the oil collecting groove 14 through the first oil inlet hole 12, and the high-temperature fuel oil is prevented from ablating guide vanes of the turbine.
According to the working principle, the plunger 4 is changed due to the starting or stopping of the engine and the pressure in the casing, the engine works normally, the plunger 4 moves downwards to start the sealing effect, when the engine stops working, the plunger 4 resets, and oil is discharged in the resetting process.
As a specific embodiment provided by the scheme, the oil discharge assembly comprises a plunger 4 and an adjusting rod assembly which are sequentially arranged along the valve shell 2 from top to bottom;
as shown in fig. 3, the two ends of the shutter housing 2 are open and are provided with mounting edges 26 at predetermined positions on the circumferential outer surface, the mounting edges 26 are arranged in a hexagonal structure, and the mounting edges 26 are assembled with the bottom surface of the mounting base 1 through the gasket 7; a second oil inlet hole 24 is formed in the position, corresponding to the oil collecting groove 14, of the valve shell 2;
as shown in fig. 4, the plunger 4 is movably nested at a position adjacent to the top end of the valve housing 2 (the position of the top end of the valve housing 2 and in the door cavity 21), the bottom surface of the plunger 4 is provided with a first sealing conical surface 45, and a second sealing conical surface 25 is arranged at a predetermined circumferential position of the valve housing 2, the first sealing conical surface 45 is arranged in an outer cone structure, the second sealing conical surface 25 is arranged in an inner cone structure, or the first sealing conical surface 45 and the second sealing conical surface 25 can be respectively provided with a high temperature resistant sealing ring
One end of the adjusting rod component is fixed in the valve shell 2, and the other end of the adjusting rod component is in contact connection with the inner wall of the top surface of the plunger 4 and can reset after the plunger 4 is pressed;
when the engine works, fuel oil is fully combusted, the pressure in the engine case is increased, the top surface of the plunger 4 is stressed and moves downwards along the direction of the central line of the valve shell 2, and the first sealing conical surface 45 and the second sealing conical surface 25 are driven to be tightly attached to seal the engine case;
when the engine stops working, the pressure in the casing is reduced, so that the top surface of the plunger 4 is stressed to be reduced,
the adjusting rod assembly is driven to push back the plunger 4, the first sealing conical surface 45 and the second sealing conical surface 25 are driven to be separated, high-temperature oil entering the oil collecting groove 14 enters the valve shell 2 through the second oil inlet hole 24 and is discharged, and the guide vane of the turbine is prevented from being ablated by the high-temperature fuel oil.
As a specific embodiment provided in the present application, as shown in fig. 5, the adjusting rod assembly includes an adjusting rod 6 and a spring 5, the adjusting rod 6 is provided with an elastic mounting surface 62 near the top end, the portion extending out of the elastic mounting surface 62 is used as a limiting boss 61, one end of the spring 5 is partially nested on the limiting boss 61, the other end of the spring is abutted against the inner top surface of the plunger 4, the adjusting rod 6 is mounted on the shutter housing 2 through a mounting thread 28, wherein,
when the engine stops working, the pressure in the casing is reduced, and the compressed spring 5 pushes the plunger 4 back to the initial position, so that the first sealing conical surface 45 and the second sealing conical surface 25 are driven to separate, and high-temperature oil entering the oil collecting tank 14 enters the valve shell 2 through the second oil inlet hole 24 and is discharged.
The amount of expansion and contraction of the spring 5 determines the distance between the first sealing conical surface 45 and the second sealing conical surface 25, and specifically, the distance can be determined through experiments and the material of the spring through limited experiments.
As a specific embodiment provided in the present application, the adjusting lever assembly further includes a nut 9 (hexagonal nut) mounted on the adjusting lever 6, a threaded rod 64 is integrally disposed on the adjusting lever 6, as shown in fig. 6, anti-rotation lugs 81 and protrusions 82 are disposed on the top surface and the bottom surface of the locking plate 8 in a staggered manner, the adjusting lever 6 passes through the locking plate 8, a mounting thread 28 for mounting the adjusting lever 6 is disposed in the valve housing 2 below the second sealing conical surface 25, the mounting thread 28 is used for mounting the threaded rod 64, and a plurality of oil discharge holes 27 are disposed at positions concentric with the mounting thread 28, wherein,
the nut 9 is used for fixing and preventing the adjusting rod 6 from rotating;
the protrusion 82 is used for preventing the nut 9 from loosening due to vibration;
the anti-rotation lug 81 is bent and then embedded into one of the oil drain holes 27 to complete the fixation. The projection 82 is closely attached to the plane of the nut 9, and fixes the adjustment lever 6 to the shutter housing 2 and prevents the adjustment lever 6 from rotating.
As a specific implementation manner provided by the scheme, a collar installation groove 22 is formed in the inner surface of the housing, which is close to the top surface, a collar 3 is placed in the collar installation groove 22, and the collar 3 is used for limiting the plunger 4, so that the plunger 4 is prevented from extending out of the top surface of the valve housing 2.
As an embodiment provided in the present application, the upper end face 41 of the plunger 4 is provided with a docking station for mounting the plunger 4.
As the specific implementation mode provided by the scheme, the bottom end of the adjusting rod 6 is provided with a rotary limiting groove, so that the adjusting rod is convenient to install in the valve shell 2 by adopting a tool.
The mounting seat, the valve shell, the clamping ring, the plunger, the spring, the adjusting rod, the gasket, the locking plate and the nut are all made of high-temperature alloy which can resist the temperature of more than 650 ℃.
And an adjusting rod 6 mounting thread 28, which is equivalent to a nut and is used for assembling the adjusting rod 6, is arranged in the valve shell 2 and below the second sealing conical surface 25, and the adjusting rod 6 is locked by assembling a locking plate 8 and a nut 9 below a mounting surface 29 of the adjusting rod 6. An oil discharge hole 27 is formed below the second sealing conical surface 25 and on the valve housing 2, specifically, an integral baffle plate may be placed in the valve housing 2 below the second sealing conical surface 25, and the oil discharge hole 27 is formed on the baffle plate.
In the above scheme, the sensitivity of the plunger to pressure is improved, the weight-reducing groove 100 is formed in the middle position of the plunger in the vertical direction, the weight of the plunger is reduced, and the cylindrical matching surface 43 and the limiting cylindrical surface 44 of the plunger 4 are formed. The height of the cylindrical matching surface 43 and the limiting cylindrical surface 44 is higher than that of the oil inlet hole 24 of the valve shell 2, fuel oil flows into the oil outlet 201 from the sealing conical surface 45 below the plunger 4, the matching part of the valve cavity 21 of the valve shell 2 does not contact with the fuel oil in the oil discharging process, and the possibility of valve clamping stagnation caused by fuel oil coking is avoided.
The technical effects are as follows:
1. the fuel oil discharging device can be assembled on an aircraft engine, discharges fuel oil in the casing after the engine stops, and automatically closes a flow path after the engine is started;
2. the inner cavity and the outer cavity are adopted to respectively accommodate the oil way and the plunger, so that the situation that the plunger contacts fuel oil with the matching surface of the valve shell is avoided, and the plunger is prevented from being stuck due to coking and carbon deposition of the fuel oil at the matching surface of the plunger and the valve shell caused by high-temperature air during working;
3. when the closing pressure of the valve needs to be adjusted, the compression amount of the spring can be adjusted by directly adjusting the nut, the locking plate and the adjusting rod without disassembling the oil discharging device
Examples
The base 11 and the casing of the mounting base 1 are connected through welding, the oil inlet hole 12 is used for introducing fuel into an oil collecting groove 14, and the thread 13 and the mounting surface 15 are used for mounting the valve shell 2. The valve shell 2 is screwed into the thread 13 of the mounting seat 1 through the mounting thread 23, and the gasket 7 is assembled between the hexagonal mounting edge 26 of the valve shell 2 and the mounting surface 15 of the mounting seat 1, so that the valve shell 2 is connected.
The valve cavity 21 is used for installing the plunger 4, the top end of the valve cavity 21 is higher than the base 11 of the installation seat 1, and fuel oil is prevented from entering between the valve cavity 21 and the plunger 4 from the valve shell 2; a collar mounting groove 22 is formed above the valve cavity 21 and close to the top end, and is used for mounting the collar 3, and the upward displacement of the plunger 4 can be limited by the collar 3 and the collar mounting groove 22;
the oil inlet 24 introduces fuel from the oil sump 14 of the mounting base 1 into the lower end of the valve cavity 21, flows through the sealing conical surface 25, the oil discharge hole 27 and enters the oil discharge port 201. An independent oil path is formed outside the valve cavity 21 of the valve shell 2 by virtue of the oil inlet 12 and the oil collecting groove 14 of the mounting seat 1;
the sealing conical surface 25 is a conical surface forming an angle of 45 degrees with the horizontal plane, and can realize sealing when being attached to the sealing conical surface 45 of the plunger 4;
in the open state, the accumulated fuel can be discharged through the fit clearance between the sealing conical surface 25 and the sealing conical surface 45, when the engine works, the pressure of the air flow in the casing is gradually increased, and when the air flow reaches the lower part of the plunger after flowing into the matching surfaces of the oil discharge hole 27 with smaller hole diameter and the sealing conical surface 25 and the sealing conical surface 45 with small gaps, a certain proportion of pressure loss is generated, the pressure of the airflow inside the casing is applied to the plunger 4, the pressure difference between the upper and lower parts of the plunger 4 will generate downward pressure, when the pressure of the airflow in the upper casing rises to a certain value, the downward pressure borne by the plunger 4 is greater than the pretightening force of the spring 5, the plunger 4 moves downwards until the sealing conical surface 25 is attached to and sealed with the sealing conical surface 45, and when the pressure of the airflow in the upper casing is less than a certain value, the plunger 4 is jacked upwards by the elasticity of the spring 5 until the plunger is limited by the clamping ring 3, and the sealing conical surface 25 is separated from the sealing conical surface 45 to form an oil discharge gap;
the adjusting rod mounting thread 28 is used for assembling the adjusting rod 6, and the locking plate 8 and the nut 9 are assembled below the adjusting rod mounting surface 29 to lock the adjusting rod 6;
the drain nipple mounting threads 202 are used to attach a drain pipe below.
In an embodiment of the present invention, the plunger 4 is installed in the valve cavity 21 of the valve housing 2, and the plunger 4 can slide up and down in the valve cavity 21 through the clearance fit between the cylindrical mating surface 43 and the limiting cylindrical surface 44 and the valve cavity 21, the spring 5 and the adjusting rod 6 are installed inside the inner cavity 46 of the plunger 4, the upper end surface 41 of the plunger 4 is limited by the collar 3 and the collar installation groove 22, the spring installation surface 47 of the inner cavity 46 is supported by the spring 5 installed on the adjusting rod 6, and the compression amount of the spring 5 can be adjusted to obtain the required pre-tightening force by rotating the adjusting rod 6.
When the pressure caused by the air pressure in the casing to the upper end surface of the plunger 4 exceeds the pre-tightening force of the spring 5, the plunger 4 slides downwards and compresses the spring 5, the sealing conical surface 45 is attached to and sealed with the sealing conical surface 25 of the valve cavity 21, so that the air in the casing is prevented from leaking to the oil discharge port 201 through the oil collecting groove 14 and the oil inlet hole 24, and the air in the casing is also prevented from leaking to the oil discharge port 201 through the gap between the cylindrical matching surface 43, the limiting cylindrical surface 44 and the valve cavity 21. When the pressure of the air pressure in the casing on the upper end surface of the plunger 4 is smaller than the pretightening force of the spring 5, the spring 5 jacks up the plunger 4 to the position of the clamping ring 3, the sealing conical surface 45 is separated from the sealing conical surface 25 of the valve cavity 21, fuel accumulated in the casing can flow out from the space between the sealing conical surface 45 and the sealing conical surface 25 below the plunger 4, and the opening and the automatic closing of the plunger 4 are realized through the pretightening force of the spring 5 and the pressure in the casing.
The positions of the cylindrical matching surface 43 and the limiting cylindrical surface 44 of the plunger 4 are higher than the oil inlet hole 24 of the valve shell 2, and fuel cannot enter the matching position of the cylindrical matching surface 43 and the limiting cylindrical surface 44 of the plunger 4 and the valve cavity 21 on the valve shell 2, so that fuel can be prevented from being accumulated on the sliding path of the plunger 4, and coking or carbon deposition of fuel on the cylindrical matching surface 43 and the limiting cylindrical surface 44 of the plunger 4 or the valve cavity 21 in a hot state is avoided.
In one embodiment of the invention, the adjusting rod 6 is mounted on the adjusting rod mounting thread 28 of the shutter housing 2, the limiting boss 61 and the spring mounting surface 62 are used for supporting the spring 5, the threaded rod 64 rotates in the mounting thread 28 by rotating the limiting groove 65, the height of the mounting surface 62 changes along with the rotation, and the compression amount of the spring 5 can be adjusted to obtain different closing pressures;
after the closing pressure adjustment is completed, under the condition that the limiting groove 65 is locked by a tool, the locking plate 8 and the nut 9 are installed, the threaded rod 64 and the installation thread 28 are tightly clamped by tightening the nut 9, the threaded rod 64 is prevented from rotating, an anti-rotating lug 81 with smaller width on the locking plate 8 extends into the oil discharge hole 27 beside the installation thread 28, the other lug 82 is tightly attached to the plane of the nut 9, the nut 9 is prevented, and the thread withdrawal groove 63 can prevent the thread ending of the threaded rod 64 from interfering with the installation thread 28 of the adjusting rod;
when the compression amount of the spring 5 needs to be readjusted to obtain different closing pressures, a tool is used for prying the lug 82 close to the nut 9, the nut 9 can be rotated and loosened, then the limiting groove 65 is screwed to adjust the compression amount of the spring 5 to obtain the required closing pressure, and finally the nut 9 is screwed repeatedly and the locking piece 8 is used for locking the nut 9.
The products provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the invention without departing from the inventive concept, and those improvements and modifications also fall within the scope of the claims of the invention.
Claims (8)
1. A case oil discharge device is suitable for discharging case oil in an aircraft engine and is characterized by comprising a mounting seat (1) arranged on a case and a valve shell (2) connected with the mounting seat (1), wherein the valve shell (2) is arranged in a hollow structure and is provided with an oil discharge assembly, an oil collecting tank (14) is arranged on the inner surface of the mounting seat (1), a first oil inlet hole (12) is arranged on the top surface of the mounting seat,
when the engine works, fuel oil is fully combusted, the pressure in the engine case is increased, the oil discharge assembly can be driven to seal the valve shell (2), and the engine case is sealed;
when the engine stops working, the pressure in the engine case is reduced, and the oil discharge assembly can be driven to discharge high-temperature fuel entering the oil collecting groove (14) through the first oil inlet hole (12), so that the high-temperature fuel is prevented from ablating guide vanes of the turbine.
2. The oil discharge device of the casing according to claim 1, wherein the oil discharge assembly comprises a plunger (4) and an adjusting rod assembly which are sequentially installed along the valve housing (2) from top to bottom;
the valve shell (2) is provided with openings at two ends, mounting edges (26) are arranged at preset positions on the circumferential outer surface, the mounting edges (26) are arranged in a hexagonal structure, and the mounting edges (26) are assembled with the bottom surface of the mounting seat (1) through gaskets (7); a second oil inlet hole (24) is arranged on the valve shell (2) at the position corresponding to the oil collecting groove (14), wherein,
the plunger (4) is movably nested at the position close to the top end of the valve shell (2), a first sealing conical surface (45) is arranged on the bottom surface of the plunger (4), and a second sealing conical surface (25) is arranged at a preset position in the circumferential direction of the valve shell (2);
one end of the adjusting rod assembly is fixed in the valve shell (2), and the other end of the adjusting rod assembly is in contact connection with the inner wall of the top surface of the plunger (4), and can reset after the plunger (4) is pressed;
when the engine works, fuel oil is fully combusted, the pressure in the engine case is increased, the top surface of the plunger (4) is stressed and moves downwards along the direction of the central line of the valve shell (2) to drive the first sealing conical surface (45) and the second sealing conical surface (25) to be tightly attached so as to seal the engine case;
when the engine stops working, the pressure in the engine case is reduced, so that the top surface stress of the plunger (4) is reduced, the plunger (4) is pushed back by the adjusting rod assembly, the first sealing conical surface (45) and the second sealing conical surface (25) are separated, high-temperature oil entering the oil collecting tank (14) enters the valve shell (2) through the second oil inlet hole (24) and is discharged, and the guide vane of the turbine is prevented from being ablated by the high-temperature fuel oil.
3. The oil discharging device of the casing according to claim 2, characterized in that the adjusting rod assembly comprises an adjusting rod (6) and a spring (5), the adjusting rod (6) is provided with an elastic mounting surface (62) near the top end, the part extending out of the elastic mounting surface (62) is used as a limit boss (61), one end part of the spring (5) is nested on the limit boss (61), the other end part of the spring is resisted on the inner top surface of the plunger (4), the adjusting rod (6) is installed on the valve shell (2) through an installation thread (28), wherein,
when the engine stops working, the pressure in the engine case is reduced, the compressed spring (5) pushes the plunger (4) back to the initial position, so that the first sealing conical surface (45) and the second sealing conical surface (25) are driven to be separated, and high-temperature oil entering the oil collecting tank (14) enters the valve shell (2) through the second oil inlet hole (24) and is discharged.
4. The oil discharge device for the crankcase according to claim 3, wherein the adjusting rod assembly further comprises a nut (9) and a locking plate (8) installed on the adjusting rod (6), a threaded rod (64) is installed on the adjusting rod (6) and is integrally formed from a position adjacent to the elastic installation surface (62) to the bottom end, the top surface and the bottom surface of the locking plate (8) are staggeredly provided with anti-rotation lugs (81) and protrusions (82), the adjusting rod (6) passes through the locking plate (8), an installation thread (28) for installing the adjusting rod (6) is provided in the valve housing (2) and below the second sealing conical surface (25), and a plurality of oil discharge holes (27) are provided corresponding to the installation thread (28), wherein,
the nut (9) is used for fixing and preventing the adjusting rod (6) from rotating;
the bulge (82) is used for preventing the nut (9) from loosening due to vibration;
prevent that it imbeds partially to change lug (81) after buckling in oil drain hole (27), the part plane of nut (9) is hugged closely to arch (82), will adjust pole (6) with valve casing (2) are fixed and are prevented adjust pole (6) rotate.
5. The oil drain device of the casing of the engine as claimed in claim 4, wherein the inner surface of the casing adjacent to the top surface is provided with a mounting groove (22) for the collar (3), the collar (3) is placed in the mounting groove (22) for the collar (3), and the collar (3) is used for limiting the plunger (4) to prevent the plunger (4) from extending out of the top surface of the valve casing (2).
6. A casing drainage device according to claim 5, wherein the upper end surface (41) of the plunger (4) is provided with a docking station for the mounting of the plunger (4).
7. The oil discharge device of the casing according to claim 6, wherein a rotation limiting groove is formed at the bottom end of the adjusting rod (6) so as to be conveniently installed in the valve housing (2) by adopting a tool.
8. A casing oil drain device according to claim 7, characterized in that an adjusting rod (6) mounting thread (28) is provided in the shutter housing (2) below the second sealing cone (25) for mounting the adjusting rod (6), and the adjusting rod (6) is locked by mounting a locking plate (8) and a nut (9) below a mounting surface (29) of the adjusting rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222233.2A CN114151199B (en) | 2021-10-20 | 2021-10-20 | Oil discharging device for casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN114151199B (en) | 2023-06-02 |
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