CN216643182U - Blow-off check valve - Google Patents
Blow-off check valve Download PDFInfo
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- CN216643182U CN216643182U CN202123081335.5U CN202123081335U CN216643182U CN 216643182 U CN216643182 U CN 216643182U CN 202123081335 U CN202123081335 U CN 202123081335U CN 216643182 U CN216643182 U CN 216643182U
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Abstract
The utility model relates to the technical field of aerospace liquid oxygen kerosene engines, in particular to a blow-off one-way valve; the valve comprises an inlet valve body, an outlet valve cover, a main valve core, a first spring and an auxiliary valve core unit, wherein one end of the inlet valve body is provided with an inlet, the other end of the inlet valve body is in threaded connection with the outlet valve cover, the other end of the outlet valve cover is provided with an outlet, and the first spring is arranged between the inlet valve body and the main valve core; compared with the prior art, the non-metal radial static seal adopted by the inlet valve body and the outlet valve cover is designed into the metal axial static seal, so that the volume weight of the product is reduced, the aging problem of the non-metal sealing element is avoided, and the working and storage life of the product is prolonged; the utility model changes the guiding mode of the sliding of the auxiliary valve core from the guiding of the inner hole of the main valve core to the guiding of the inner hole of the spring seat, and greatly reduces the sliding friction force of the auxiliary valve core and increases the medium flow area of the product by reducing the diameter of the sliding friction surface and increasing the length-diameter ratio of the sliding guide.
Description
Technical Field
The utility model relates to the technical field of aerospace liquid oxygen kerosene engines, in particular to a blow-off check valve for controlling supply of blow-off gas.
Background
The liquid rocket engine generally comprises a propellant supply system, a starting ignition system, a blowing system, a supercharging system, a vacuumizing system, a precooling system, an adjusting system and the like, wherein the high-pressure fuel-supplemented liquid oxygen kerosene engine adopts an oxygen-enriched fuel gas generator circulating mode, so that the problems of fuel gas carbon deposition and combustion instability in the circulation of the fuel gas generator are well solved, therefore, the blowing system needs to adopt valve structures in various forms to blow off an inner cavity of the blowing system and control the pressure and flow of the blowing gas, a valve which can be automatically closed when the outlet pressure of the valve reaches a certain value and has good sealing performance is particularly needed during blowing off, the existing common one-way valve does not have the function of controlling the flow of the blowing gas, and the function of automatically closing under the condition that the outlet pressure is lower than the inlet pressure under the high-pressure condition of the high-pressure fuel-supplemented liquid oxygen kerosene engine can not be realized, technical problems such as high-pressure redundant sealing requirements and the like are not met, and once the sealing fails, the normal work of the engine is greatly influenced;
in order to solve the technical problem, the prior differential one-way valve adopts a mature structural form of double-valve-core, and is disclosed in the patent application publication No. CN113108097A, the structure mainly comprises a valve body, a main valve core arranged in the valve body, a main valve core spring, an auxiliary valve core arranged in the main valve core, an auxiliary valve core spring, a spring seat, a valve cover, two dynamic sealing rings, a static sealing ring and the like, the structure can close the main and auxiliary valves when the outlet pressure is lower than the inlet pressure, and the main and auxiliary valves are sealed during closing, so that the high-pressure redundant sealing requirement is met, and the possibility that outlet media leaks to an inlet under the high pressure existing in a common one-way valve is greatly reduced; aiming at the development of the aerospace industry at home and abroad, the aerospace launching task is various, and a small-size light-weight liquid rocket engine with the same function is required, and a one-way valve for a blowing system of the one-way valve structure must also be small-size light-weight.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems mentioned in the prior art, the utility model provides a blow-off check valve to solve the problems mentioned in the background technology.
The utility model relates to a blow-off one-way valve which comprises an inlet valve body, an outlet valve cover, a main valve core, a first spring and an auxiliary valve core unit, one end of the inlet valve body is provided with an inlet, the other end of the inlet valve body is connected with the outlet valve cover through threads, the other end of the outlet valve cover is provided with an outlet, a first spring is arranged between the inlet valve body and the main valve core, the main valve core is arranged in the inlet valve body and the outlet valve cover, an inner cavity is arranged in the main valve core, the auxiliary valve core unit is arranged in the inner cavity and comprises an auxiliary valve core, a spring seat and a second spring which are coaxially arranged, the spring seat is in threaded connection with one end of the inner cavity close to the outlet valve cover, the other end of the inner cavity is provided with a spring seat guide hole, one end of the auxiliary valve core close to the spring seat is an extending end, the extending end extends into the spring seat guide hole, one end of the second spring is connected with the auxiliary valve core, and the other end of the second spring is connected with the spring seat; wherein, a sealing element is arranged between the inlet valve body and the outlet valve cover and is arranged along the axial direction.
Preferably, the sealing element is a sealing gasket, and the sealing gasket is made of metal.
Preferably, the main valve element is provided with at least one inlet hole.
Preferably, a first sealing ring and a second sealing ring are arranged between the inlet valve body and the main valve core, wherein the second sealing ring is arranged at one end of the main valve core close to the outlet valve cover, and the first sealing ring is arranged at the opposite end.
Preferably, the inlet valve body is further provided with an inclined vent hole, wherein the inclined vent hole is located between the first sealing ring and the second sealing ring, and the inclined vent hole is further provided with a filter screen.
Compared with the prior art, the utility model has the following technical effects:
1. compared with the prior art, the non-metal radial static seal adopted by the inlet valve body and the outlet valve cover is designed into the metal axial static seal, so that the aging problem of a non-metal sealing element is reduced, the working and storage life of a product is prolonged, the axial setting structure is improved while the sealing effect is ensured, the integral axial and radial sizes of the whole product can be reduced, the volume and the weight of the product are reduced, and the weight can be reduced by more than 36%;
2. the utility model changes the guiding mode of the sliding of the auxiliary valve core from the guiding of the inner hole of the main valve core to the guiding of the inner hole of the spring seat, and greatly reduces the sliding friction force of the auxiliary valve core by reducing the diameter of the sliding friction surface and increasing the length-diameter ratio of the sliding guide, the friction force can be reduced by more than 3.8 times, the possibility of clamping stagnation of the auxiliary valve core under different working conditions is better avoided, and the working reliability of the engine is improved; meanwhile, the flow area of the medium in the auxiliary valve is increased through the structure, and the efficiency of the engine is higher.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Reference numerals: 1. an inlet valve body; 2. a main valve element; 3. a first spring; 4. an auxiliary valve core; 5. a second spring; 6. a spring seat; 7. an outlet valve cover; 8. a gasket; 9. a second seal ring; 10. filtering with a screen; 11. a first seal ring; 12. filtering with a screen; 13. entering a hole; 14. and (4) inclined holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in fig. 1, the blow-off check valve of the utility model comprises an inlet valve body 1, an outlet valve cover 7, a main valve element 2, a first spring 3 and an auxiliary valve element 4 unit, wherein one end of the inlet valve body 1 is provided with an inlet, the other end of the inlet valve body is in threaded connection with the outlet valve cover 7, the other end of the outlet valve cover 7 is provided with an outlet, the first spring 3 is arranged between the inlet valve body 1 and the main valve element 2, the main valve element 2 is arranged in the inlet valve body 1 and the outlet valve cover 7, an inner cavity is arranged in the main valve element 2, the auxiliary valve element 4 unit is arranged in the inner cavity, the auxiliary valve element 4 unit comprises an auxiliary valve element 4, a spring seat 6 and a second spring 5 which are coaxially arranged, the spring seat 6 is in threaded connection with one end of the inner cavity close to the outlet valve cover 7, the other end is provided with a guide hole of the spring seat 6, one end of the auxiliary valve element 4 close to the spring seat 6 is an extension end, and the extension end extends into the guide hole of the spring seat 6, one end of the second spring 5 is connected with the auxiliary valve core 4, and the other end of the second spring is connected with the spring seat 6; wherein a sealing element is arranged between the inlet valve body 1 and the outlet valve cover 7 and is arranged along the axial direction.
In this embodiment, as shown in fig. 1, a main valve element 2 adopts a four-step axial cylindrical structure, one end of the main valve element 2, which is close to an inlet valve body 1, is a conical surface structure, an inlet and an end surface structure of the inlet valve body 1 form a sealing surface, an inner cavity of the main valve element 2 adopts a three-step cylindrical flow passage, and a sealing surface is formed between a second step and an auxiliary valve element 4; the auxiliary valve core 4 unit comprises an auxiliary valve core 4, a spring seat 6 and a second spring 5, wherein the spring seat 6 is used for fixing the second spring 5, the second spring 5 provides reset for the auxiliary valve core 4, a guide hole of the spring seat 6 arranged in the embodiment is matched with the auxiliary valve core 4 and can provide guide for the auxiliary valve core 4 to move, compared with the traditional structure, the friction area of the auxiliary valve core 4 is reduced, the guide length is prolonged, the length-diameter ratio of friction guide is increased, and the friction force is reduced, an axial overflowing straight hole is further arranged on the auxiliary valve core 4 in the embodiment, and the straight hole and a plurality of inclined holes 14 arranged on the spring seat 6 form an overflowing channel together; still be equipped with the sealing member between import valve body 1 and the export valve gap 7 simultaneously, the sealing member is radial setting for traditional structure, and this embodiment adopts the axial setting, can reduce holistic axial of whole product and radial size when guaranteeing the leakproofness for the volume weight of product diminishes.
The sealing element is a sealing gasket 8, and the sealing gasket 8 is made of metal. The thickness of the metal sealing gasket in the embodiment is selected according to the material and the specific working requirement, and compared with a non-metal sealing element, the aging problem is solved, and the working and storage life of the product is prolonged.
At least one inlet opening 13 is provided in main valve element 2. The main valve core 2 is provided with two inlet holes 13, which can ensure that the blowing gas enters from the inlet holes 13, so that the auxiliary valve core 4 is opened.
A first sealing ring 11 and a second sealing ring 9 are arranged between the inlet valve body 1 and the main valve element 2, wherein the second sealing ring 9 is arranged at one end, close to the outlet valve cover 7, of the main valve element 2, and the first sealing ring 11 is arranged at the opposite end. In this embodiment, the second sealing ring 9 is larger than the first sealing ring 11, and the first sealing ring 11 and the second sealing ring 9 play a role in sealing, so as to prevent gas (liquid) from leaking.
The inlet valve body 1 is further provided with an inclined ventilation hole, wherein the inclined ventilation hole is located between the first sealing ring 11 and the second sealing ring 9, and the inclined ventilation hole is further provided with a filter screen 12. When main spool 2 moves causing a decrease in cavity pressure, screen 12 prevents foreign particles from being drawn into inlet valve body 1, impeding main spool 2 movement.
When the valve works, gas enters from an inlet, passes through the inlet hole 13 of the main valve element 2 and the inner cavity under the action of gas pressure, enters the front end of the auxiliary valve element 4, then overcomes the friction force and the force of the second spring 5 when the gas acts on the auxiliary valve element 4, opens the auxiliary valve element 4, and the gas enters the outlet of the outlet valve body from the overflowing channel through the auxiliary valve element 4;
under the action of inlet gas pressure, along with the continuous rising of outlet pressure of the outlet valve body, the acting force acted on one end, close to the outlet valve body, of the main valve element 2 is continuously increased, when the pressure reaches a certain value, the main valve element 2 can overcome the acting force of the gas, the spring force and the friction force are pushed to the end face of the inlet valve body 1, the main valve element 2 is attached to the end face, the main valve element 2 is closed and sealed, meanwhile, the auxiliary valve element 4 is closed under the action of the second spring 5, meanwhile, the auxiliary valve element 4 can keep sealed under the action of a medium at the outlet, even if the sealing position of the auxiliary valve element 4 leaks, the main valve element 2 can still keep sealed, and the sealing redundancy function is realized.
Claims (5)
1. A blow-off check valve comprises an inlet valve body (1), an outlet valve cover (7), a main valve core (2), a first spring (3) and an auxiliary valve core (4) unit, wherein one end of the inlet valve body (1) is provided with an inlet, the other end of the inlet valve body is in threaded connection with the outlet valve cover (7), the other end of the outlet valve cover (7) is provided with an outlet, the first spring (3) is arranged between the inlet valve body (1) and the main valve core (2), the main valve core (2) is arranged in the inlet valve body (1) and the outlet valve cover (7), an inner cavity is arranged in the main valve core (2), the auxiliary valve core (4) unit is arranged in the inner cavity, the blow-off check valve is characterized in that the auxiliary valve core (4) unit comprises an auxiliary valve core (4), a spring seat (6) and a second spring (5) which are coaxially arranged, and the spring seat (6) is in threaded connection with one end of the inner cavity close to the outlet valve cover (7), the other end of the auxiliary valve core (4) is provided with a guide hole of a spring seat (6), one end of the auxiliary valve core (4) close to the spring seat (6) is an extending end, the extending end extends into the guide hole of the spring seat (6), one end of a second spring (5) is connected with the auxiliary valve core (4), and the other end of the second spring is connected with the spring seat (6);
wherein a sealing element is arranged between the inlet valve body (1) and the outlet valve cover (7) and is arranged along the axial direction.
2. A blow-off check valve according to claim 1, characterized in that the sealing member is a sealing gasket (8), the sealing gasket (8) being of metal.
3. A blow-off check valve according to claim 1, characterised in that the main valve element (2) is provided with at least one inlet opening (13).
4. A blow-off check valve according to claim 1, characterised in that a first sealing ring (11) and a second sealing ring (9) are provided between the inlet valve body (1) and the main valve spool (2), wherein the second sealing ring (9) is provided at the end of the main valve spool (2) near the outlet valve cover (7) and the first sealing ring (11) is provided at the opposite end.
5. The blow-off check valve according to claim 1, characterized in that the inlet valve body (1) is further provided with an inclined vent hole, wherein the inclined vent hole is located between the first sealing ring (11) and the second sealing ring (9), and the inclined vent hole is further provided with a filter screen (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123081335.5U CN216643182U (en) | 2021-12-09 | 2021-12-09 | Blow-off check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123081335.5U CN216643182U (en) | 2021-12-09 | 2021-12-09 | Blow-off check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216643182U true CN216643182U (en) | 2022-05-31 |
Family
ID=81739061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123081335.5U Active CN216643182U (en) | 2021-12-09 | 2021-12-09 | Blow-off check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216643182U (en) |
-
2021
- 2021-12-09 CN CN202123081335.5U patent/CN216643182U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Fan Huiming Inventor after: Shi Junpu Inventor after: Yang Erpeng Inventor after: Wang Xiaobing Inventor after: Liu Kehuan Inventor after: Huo Xiaolong Inventor after: Ren Bohui Inventor before: Fan Huiming Inventor before: Shi Junpu Inventor before: Yang Erpeng Inventor before: Wang Xiaobing Inventor before: Ma Shubing Inventor before: Liu Kehuan Inventor before: Huo Xiaolong Inventor before: Ren Bohui |
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| CB03 | Change of inventor or designer information |