CN218954592U - Bidirectional valve for lubricating oil system - Google Patents
Bidirectional valve for lubricating oil system Download PDFInfo
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- CN218954592U CN218954592U CN202222837537.6U CN202222837537U CN218954592U CN 218954592 U CN218954592 U CN 218954592U CN 202222837537 U CN202222837537 U CN 202222837537U CN 218954592 U CN218954592 U CN 218954592U
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Abstract
The utility model belongs to the technical field of design of lubricating oil systems of aeroengines, and relates to a bidirectional valve with a bidirectional conduction function for a lubricating oil system. When the pressure is high and the pressure is low, two unidirectional valves with opposite opening directions are needed, and two sets of connecting pipelines have relatively complex structures. The utility model comprises a large valve seat which is arranged in a shell in a sealing way, wherein the inside of the large valve seat is provided with an annular seat body with a valve seat through hole and a shaft hole; the valve core is provided with a shaft rod part and a seat body part at the end part, the seat body part is provided with a plurality of seat body through holes, and the shaft rod part is connected with the spring seat in the front cavity after passing through the small valve seat in the rear cavity and the shaft hole of the annular seat body; a large spring is arranged between the annular seat body and the spring seat in a precompression mode, and a small spring is arranged between the annular seat body and the small valve seat in a precompression mode; the small valve seat is provided with a sealing gasket in the area corresponding to the through hole of the seat body, and the large valve seat is provided with a sealing ring in the area corresponding to the seat body. The sealing performance is good, and the integration level is high; reasonable structure and easy maintenance.
Description
Technical Field
The utility model belongs to the technical field of design of lubricating oil systems of aeroengines, and relates to a bidirectional valve with a bidirectional conduction function for a lubricating oil system.
Background
The bearing cavity pressure of the aeroengine has great influence on the oil supply characteristic of the lubricating oil nozzle, and is stable in a general working state or in a low-altitude flight state, but the bearing cavity pressure in a high-altitude state has great change. In order to ensure stable cavity pressure and good lubrication of the bearing, the opening and closing of the air vent of the bearing cavity need to be adjusted in time. When the pressure is high and the pressure is low, two unidirectional valves with opposite opening directions are needed, and two sets of connecting pipelines have relatively complex structures.
Disclosure of Invention
The purpose of the utility model is that: a bidirectional valve for a lubricating oil system with a bidirectional conduction function is provided to stabilize cavity pressure. Two integrated one-way valves with opposite opening directions are arranged between a front bearing cavity and a ventilation valve of an engine lubricating oil system so as to control the pressure of the front bearing cavity to be in a reasonable range, and simultaneously seal the front bearing cavity when the engine is in cold rotation.
The utility model relates to a bidirectional valve for a lubricating oil system, which comprises a large valve seat, wherein the large valve seat is arranged in a shell in a sealing way, is of an annular structure and is internally provided with an annular seat body with a valve seat through hole and a shaft hole; the valve core is provided with a shaft rod part and a seat body part at the end part, the seat body part is provided with a plurality of seat body through holes, and the shaft rod part is connected with the spring seat in the front cavity after passing through the small valve seat in the rear cavity and the shaft hole of the annular seat body; a large spring is arranged between the annular seat body and the spring seat in a precompression mode, and a small spring is arranged between the annular seat body and the small valve seat in a precompression mode; the small valve seat is provided with a sealing gasket in the area corresponding to the through hole of the seat body, and the large valve seat is provided with a sealing ring in the area corresponding to the seat body.
Advantageously, the spring seat is fixed to the end of the shaft portion by a stop ring and a stop sleeve.
Advantageously, the housing comprises an upper housing and a lower housing, the large valve seat being mounted in a cavity formed by the upper housing and the lower housing and having a gasket on the abutting end face.
Advantageously, the upper housing has a connection port and the lower housing has a connection port.
Advantageously, the connection ports are each a 74 ° cone joint threaded connection.
Advantageously, an adjusting pad is also provided on the end face of the annular seat facing the large spring 4.
Compared with the prior art, the two valves are integrated into one valve, and share one set of pipeline, so that the structure is simplified while the functional requirements are met, and the development requirements of small volume, light weight and high integration level of aviation accessories are met.
The beneficial effects are that: the sealing performance is good, and the integration level is high; two sets of ventilation pipes are integrated into a whole, so that the structure is simplified, and the volume and the weight are reduced; reasonable structure and easy maintenance.
Drawings
FIG. 1 is an exploded view of a two-way valve;
FIG. 2 is a state diagram of the bi-directional valve being unidirectionally opened in one direction;
fig. 3 is a state diagram in which the two-way shutter is opened unidirectionally in the other direction.
Wherein, 1-upper shell, 2-baffle ring, 3-spring seat, 4-big spring, 5-big valve seat, 6-sealing pad, 7-valve core, 8-lower shell, 9-baffle sleeve, 10-adjusting pad, 11-small spring, 12-small valve seat, 13-valve seat through hole and 14-seat through hole
Detailed Description
A bi-directional valve for a lubricating oil system, comprising: the valve comprises an upper shell 1, a baffle ring 2, a spring seat 3, a large spring 4, a large valve seat 5, a sealing gasket 6, a valve core 7, a lower shell 8, a baffle sleeve 9, an adjusting gasket 10, a small spring 11 and a small valve seat 12, wherein the axial section of the valve core 7 is of a T-shaped rod-shaped structure, an annular seat body part is arranged at the end part and is provided with a seat body through hole 14, the seat body part, the large valve seat 5 and the small valve seat 12 respectively form two seals, and the seat body through hole 14 is a drainage hole when the ventilation valve side is opened. The valve element 7 is a common valve element, and the shaft rod part of the valve element 7 passes through the shaft holes of the small valve seat 12 and the large valve seat 5. When the ventilation valve is opened at the side, the small valve seat 12 presses the small spring 11, the small valve seat 12 is separated from the valve core 7, and air flows to the front bearing cavity through the seat body through hole 14 of the valve core 7. When the front bearing cavity is opened, the baffle ring 2, the spring seat 3, the valve core 7, the baffle sleeve 9 and the small valve seat 12 move together, the valve core 7 and the large valve seat 5 are separated, the valve core 7 and the small valve seat 12 are pressed tightly, and air flow passes through a gap flow ventilation valve side between the valve core 7 and the large valve seat 5.
The large valve seat 5 and the small valve seat 12 are vulcanized with rubber parts in the annular grooves of the end faces so as to ensure the tightness of the sealing end faces. The valve core 7 is respectively matched with shaft holes of the large valve seat 5 and the small valve seat 12 and slides in the shaft holes under the action of pressure difference and spring force so as to realize the opening and closing of the valve. The sealing ring belt of the end face of the valve core 7 is narrower, and the sealing ring belt and vulcanized rubber in the annular grooves of the end faces of the large valve seat 5 and the small valve seat 12 form a narrow sealing belt, so that a better sealing effect can be realized under the action of pressure difference and spring force.
When the valve is in operation, the pressure on the ventilation valve side is higher than the pretightening force of the small spring 11, the small valve seat 12 compresses the small spring 11, and air flows to the front bearing cavity through the seat body through hole 14 on the valve core 7, so that cavity pressure low compensation is realized; when the side pressure of the front bearing cavity is higher than the comprehensive pretightening force of the large spring 4 and the small spring 11, the valve core 7 is separated from the large valve seat 5, and air flow flows to the ventilation valve side from a gap between the valve core 7 and the large valve seat 5, so that pressure relief is realized when the cavity pressure is high. The inlet and outlet of the two-way valve are in threaded connection with the taper pipe joint at 74 degrees, and the two-way valve is convenient to assemble and disassemble.
The sealing gaskets 6 are arranged at two ends of the large valve seat 5, are tightly pressed through threads between the upper shell 1 and the lower shell 8 through the upper shell 1 and the lower shell 8, and ensure the tightness of the two-way valve and the outside. An adjusting pad 10 is also provided between the large valve seat 5 and the small spring 11 for adjusting the compression amount of the small spring 11. The baffle ring 2 and the baffle sleeve 9 are arranged in an annular groove on the end face of the valve core 7 and are used for limiting the spring seat 3. The spring seat 3 and the large valve seat 5 are fixedly provided with a large spring 4.
And by combining the actual condition of the engine lubricating oil system, a valve structure which is in bidirectional conduction is designed, the structure which is in bidirectional conduction is reasonably designed, and the pressure of the front bearing cavity is controlled within a reasonable range. When the engine is cold-rotated, the valve is in a closed state so as to keep the pressure of the front bearing cavity stable, and simultaneously seals the front bearing cavity; when the pressure of the front bearing cavity is lower than a specified value in the working process of the engine, the valve core is opened against the elasticity of the two springs under the action of pressure difference, and oil gas flows from the front bearing cavity to the ventilation valve so as to reduce the pressure of the front bearing cavity; when the pressure difference between the ventilation valve side and the front bearing cavity is within a specified value range, the small valve seat is opened against the elastic force of the small spring, and air flows from the ventilation valve to the front bearing cavity to restore the pressure of the front bearing cavity.
The two valves which are communicated in one direction are integrated into a whole to form the valve which is communicated in two directions and is used for an aeroengine lubricating oil system to ensure the stability of bearing cavity pressure, and the valve is high in integration level and simple in structure. The bidirectional valve is reasonable in design, convenient to assemble and disassemble and easy to maintain.
Claims (6)
1. A bidirectional valve for a lubricating oil system is characterized in that: the valve seat comprises a large valve seat (5) which is arranged in a shell in a sealing way, wherein the large valve seat (5) is of an annular structure, and an annular seat body with a valve seat through hole (13) and a shaft hole is arranged in the large valve seat; the valve core (7) is provided with a shaft rod part and a seat body part at the end part, the seat body part is provided with a plurality of seat body through holes (14), and the shaft rod part is connected with the spring seat (3) in the front cavity after passing through the small valve seat (12) in the rear cavity and the shaft hole of the annular seat body; a large spring (4) is arranged between the annular seat body and the spring seat (3) in a precompressed mode, and a small spring (11) is arranged between the annular seat body and the small valve seat (12) in a precompressed mode; a seal is provided in a region corresponding to the seat body through hole (14) on the small valve seat (12), and a seal is provided in a region corresponding to the seat body portion on the large valve seat (5).
2. The bidirectional valve for a lubricating oil system according to claim 1, wherein: the spring seat (3) is fixed at the end part of the shaft rod part through the baffle ring (2) and the baffle sleeve (9).
3. The bidirectional valve for a lubricating oil system according to claim 1, wherein: the shell comprises an upper shell (1) and a lower shell (8), the large valve seat (5) is arranged in a cavity formed by the upper shell (1) and the lower shell (8), and a sealing gasket (6) is arranged on the butt end face.
4. A two-way valve for a lubricating oil system according to claim 3, wherein: the upper housing (1) has a connection port, and the lower housing (8) has a connection port.
5. The two-way valve for a grease system according to claim 4, wherein: the connecting ports are all in threaded connection with the taper pipe joints at 74 degrees.
6. The bidirectional valve for a lubricating oil system according to claim 1, wherein: an adjusting pad (10) is also arranged on the end face of the annular seat body facing the big spring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222837537.6U CN218954592U (en) | 2022-10-26 | 2022-10-26 | Bidirectional valve for lubricating oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222837537.6U CN218954592U (en) | 2022-10-26 | 2022-10-26 | Bidirectional valve for lubricating oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218954592U true CN218954592U (en) | 2023-05-02 |
Family
ID=86108604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222837537.6U Active CN218954592U (en) | 2022-10-26 | 2022-10-26 | Bidirectional valve for lubricating oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218954592U (en) |
-
2022
- 2022-10-26 CN CN202222837537.6U patent/CN218954592U/en active Active
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