CN218954135U

CN218954135U - Automatic and rapid pressure regulating valve for aerospace

Info

Publication number: CN218954135U
Application number: CN202222827422.9U
Authority: CN
Inventors: 张闯; 李海晓; 戚得新; 宋鑫; 王雪梅; 温明洋; 牛利兵; 唐寅峰; 杨振超; 郝良博
Original assignee: Xinxiang Aviation Industry Group Co Ltd
Current assignee: Xinxiang Aviation Industry Group Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-05-02
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to the technical field of aerospace, in particular to an automatic and rapid pressure regulating valve for aerospace. With the increase of the use height, the atmospheric pressure reducing valve loses the original performance in the high-altitude state, so that the valve is not fully applicable to the field of aerospace. The utility model is provided with an inner shell in the air inlet pipeline in a sealing way, wherein the inner shell is of a cup-shaped structure, and radial air holes distributed in the circumferential direction are formed in the side wall of the inner shell; a shell lining is hermetically arranged at one side of the opening end of the inner shell, and a reset spring and a pressure regulating valve pressed by the reset spring are arranged at the bottom of the other side of the inner shell; the vacuum bellows and the pressing plate integrated with the vacuum bellows are arranged in the shell lining, and the pressure regulating valve is pressed against the pressing plate under the action of the return spring and the vacuum bellows. Under the high-altitude working environment, the pressure sensing element is a vacuum device, so that the valve can still be unaffected when the external air pressure changes along with the increase of the height, and good pressure regulating performance is maintained.

Description

Automatic and rapid pressure regulating valve for aerospace

Technical Field

The utility model relates to the technical field of aerospace, in particular to an automatic and rapid pressure regulating valve for aerospace.

Background

In the aerospace field, it is often necessary to regulate the pressure of gas, such as in the cockpit, respiratory mask, supercharger, etc. The stable and reliable air source pressure is needed to be maintained, so that the safety of equipment and personnel is ensured. Therefore, the pressure regulating device suitable for the working environment ensures the stability and reliability of pressure.

The existing pressure reducing device is a diaphragm partition self-operated pressure reducing device, and the device can squeeze the diaphragm by pressure when the inlet pressure is high, so that the valve body is lifted to further reduce the opening of the valve port, and the pressure reduction is controlled by the reduction of the valve port.

The device can be suitable for the condition of normal temperature and normal pressure, but as the use height is increased, the valve loses the original performance in the high-altitude state due to the reduction of the atmospheric pressure, so the pressure reducing device is not completely suitable for the aerospace field.

Disclosure of Invention

The purpose of the utility model is that: the automatic rapid pressure regulating valve for the aerospace can be free from the influence of external atmospheric pressure, and the stable reliability of the pressure reducing device is improved, so that the device can still ensure good pressure reducing performance under the condition of external pressure change.

The utility model relates to an automatic rapid pressure regulating valve for aerospace, which comprises an outer shell with an air inlet pipeline and an air outlet pipeline, wherein an inner shell is also arranged in the air inlet pipeline in a sealing manner, the inner shell is of a cup-shaped structure, and radial air holes distributed circumferentially are formed in the side wall of the inner shell; the opening end of the inner shell faces the air inlet pipeline, a shell liner is hermetically arranged at one side of the opening end of the inner shell, and a return spring and a pressure regulating valve pressed by the return spring are arranged at the bottom of the other side of the inner shell; a vacuum corrugated pipe and a pressing plate integrated with the vacuum corrugated pipe are arranged in the shell liner, and the pressure regulating valve is pressed against the pressing plate under the action of the return spring and the vacuum corrugated pipe; during normal operation, the pressure regulating valve is opened to radial air holes, and when the pressure is increased, the pressure regulating valve gradually seals the radial air holes.

Advantageously, the pressure regulating valve is of cup-like construction, being pressed at the open end by the return spring and having an outwardly extending pressure head at the other end.

Advantageously, the outer ring surface of the pressure regulating valve is a structure for blocking the radial air hole, and in normal operation, the outer ring surface of the pressure regulating valve is at the edge of the radial air hole or at a set position away from the radial air hole.

Advantageously, the distance of the outer annular surface of the pressure regulating flap relative to the radial air holes is adjusted by means of the pressure regulating shim.

Advantageously, one end of the pressure plate is integrally connected to the vacuum bellows, and the other end has a U-shaped mouth, accommodating the pressure head.

Advantageously, the housing liner is secured in the inner housing by a retainer ring, and a baffle plate with an opening is provided at the end of the housing liner, on which baffle plate the vacuum bellows is mounted.

Advantageously, the shell liner is of annular configuration and has a necked-in configuration at an end proximal to the platen.

Advantageously, the outer housing is formed by the connection of an inlet housing and an outlet housing.

Advantageously, the sealing between the inner housing and the air inlet housing, the sealing between the inner housing and the air outlet housing and the sealing between the housing liner and the inner housing are realized by means of a first sealing ring, a second sealing ring and a third sealing ring, respectively.

The vacuum corrugated pipe is used as a pressure sensing adjusting device, the corrugated pipe is a metal corrugated pipe, and meanwhile, the corrugated pipe adopts a vacuumizing process, and a spring is arranged inside the corrugated pipe to ensure the elasticity of the corrugated pipe. The return spring is matched with the corrugated pipe, and the matched spring is arranged at the top of the corrugated pipe to ensure flexible movement of the regulating valve core. The original pressure sensing diaphragm is canceled, and the valve opening and closing is realized by matching the air outlet shell with the valve core, so that the valve is more stable and reliable. The lining shell is added to be matched with the valve core for use, so that the valve can cut off the inlet and the outlet under the condition of high pressure.

The beneficial effects are that: the automatic rapid pressure regulating valve is a vacuum device under the high-altitude working environment, so that the valve can still be unaffected when the external air pressure changes along with the increase of the height, and good pressure regulating performance is maintained.

Drawings

FIG. 1 is a schematic diagram of an automatic rapid pressure regulating valve according to the present utility model;

fig. 2 is a schematic diagram of the operation of the automatic rapid pressure regulating valve of the present utility model.

1-air inlet shell, 2-air outlet shell, 3-first sealing ring, 4-second sealing ring, 5-third sealing ring, 6-pressure regulating valve, 7-reset spring, 8-pressure regulating gasket, 9-inner shell, 10-shell lining, 11-vacuum bellows, 12-pressing plate and 13-radial air hole

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings required to be used in the embodiments of the present utility model, and it is obvious that the drawings described below are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

As shown in fig. 1, the air outlet housing 2 has an air outlet in an upper cavity, the air inlet housing 1 has an air inlet in a lower cavity, an inner housing 9 is fixedly installed in the air outlet housing 2 and the air inlet housing 1, a return spring 7 is installed at the upper bottom of the inner housing 9, the return spring 7 presses the pressure regulating valve 6 downwards, the pressure regulating valve 6 has a downward extending pressure head, a housing lining 10 is installed at the lower part of the inner housing 9, the lower end of a vacuum bellows 11 is fixed on the housing lining 10, a pressing plate 12 with an upper opening is integrally connected at the upper end, the pressure head is plugged into a U-shaped opening of the pressing plate 12, and the vacuum bellows 11 presses the pressing plate 12 upwards. The inner housing 9 has radial air holes 13 communicating the inner and outer cavities. The pressure regulating valve 6 does not block the radial air holes 13 under the condition of no overpressure; in the case of overpressure, the pressure regulating flap 6 partially closes off the radial air holes 13, so that a pressure reduction effect is achieved.

The first sealing ring 3, the second sealing ring 4 and the third sealing ring 5 realize the sealing between the inner shell 9 and the air inlet shell 1, the sealing between the inner shell 9 and the air outlet shell 2 and the sealing between the shell lining 10 and the inner shell 9.

Principle of low pressure passage

When the inlet gas is not larger than the set value, the opening of the valve port is maximum, the pressure regulating valve 6 is positioned at the topmost position under the action of the vacuum bellows 11 and the return spring 7, and the pressure regulating valve is in a full-open state at the moment, so that the working medium can pass through at full flow rate.

Principle of decompression

As can be seen from the energy conservation equation, when the flow rate is increased, the pressure is decreased, and when the flow rate is decreased, the pressure is increased, so that when the inlet pressure is increased, the pressure sensing of the vacuum bellows 11 and the restoring action of the restoring spring 7 reduce the flow area of the radial air holes 13, and further the outlet pressure is decreased. When the inlet pressure is reduced, the flow area of the radial air hole 13 is increased through the reset action of the vacuum bellows 11 and the reset spring 7, and the outlet pressure is further increased. The outlet pressure is kept stable by the co-action of the vacuum bellows 11 with the return spring 7.

Principle of high voltage turn-off

When the inlet pressure continues to increase and the outlet pressure reaches the highest limit value, the pressure regulating valve 6 continues to move downwards and completely closes the radial air holes 13, so that the high-pressure shutoff function is realized.

The valve structure for automatically and rapidly regulating the pressure is applied to an air source system of an X-20 aircraft, and mainly has the function of regulating the pressure value of an air inlet of a supercharger, when the recent pressure value is smaller than the normal working value of the supercharger, the opening of a valve port is maximum, a valve is positioned at the topmost position under the action of a vacuum bellows and a return spring, and at the moment, the working medium can pass through in a full-opening state when the pressure regulating valve is positioned; when the air inlet pressure is higher than the normal working value of the supercharger, the flow area of the decompression opening is reduced through the pressure sensing of the vacuum corrugated pipe and the reset action of the spring, so that the outlet pressure is reduced. When the inlet pressure is reduced, the flow area of the decompression opening is increased through the pressure sensing of the vacuum corrugated pipe and the reset action of the spring, and then the outlet pressure is increased. The outlet pressure is kept stable by the combined action of the vacuum bellows and the return spring.

Claims

1. The utility model provides an aerospace is with automatic quick air-vent valve, includes the shell body that has inlet tube and outlet tube, its characterized in that: an inner shell (9) is also arranged in the air inlet pipeline in a sealing way, the inner shell (9) is of a cup-shaped structure, and radial air holes (13) distributed in the circumferential direction are formed in the side wall of the inner shell; the opening end of the inner shell (9) faces the air inlet pipeline, a shell liner (10) is hermetically arranged at one side of the opening end of the inner shell (9), and a return spring (7) and a pressure regulating valve (6) pressed by the return spring (7) are arranged at the bottom of the other side of the inner shell (9); a vacuum corrugated pipe (11) and a pressing plate (12) integrated with the vacuum corrugated pipe (11) are arranged in the shell lining (10), and the pressure regulating valve (6) is pressed against the pressing plate (12) under the action of the return spring (7) and the vacuum corrugated pipe (11); during normal operation, the pressure regulating valve (6) is opened to the radial air hole (13), and when the pressure is increased, the pressure regulating valve (6) gradually seals the radial air hole (13).

2. The automatic rapid pressure regulating valve for aerospace according to claim 1, wherein: the pressure regulating valve (6) is of a cup-shaped structure, is extruded by the reset spring (7) at the opening end, and is provided with a pressure head extending outwards at the other end.

3. The automatic rapid pressure regulating valve for aerospace according to claim 2, wherein: the outer ring surface of the pressure regulating valve (6) is of a structure for blocking the radial air holes (13), and in normal operation, the outer ring surface of the pressure regulating valve (6) is arranged at the edge of the radial air holes (13) or at a set position away from the radial air holes (13).

4. The automatic rapid pressure regulating valve for aerospace according to claim 3, wherein: the distance between the outer ring surface of the pressure regulating valve (6) and the radial air hole (13) is adjusted through the pressure regulating gasket (8).

5. The automatic rapid pressure regulating valve for aerospace according to claim 2, wherein: one end of the pressing plate (12) is connected with the vacuum corrugated pipe (11) into a whole, and the other end of the pressing plate is provided with a U-shaped opening for accommodating the pressing head.

6. The automatic rapid pressure regulating valve for aerospace according to claim 5, wherein: the housing lining (10) is fixed in the inner housing (9) by a retainer ring, a baffle plate with an opening is arranged at the end part of the housing lining (10), and the vacuum bellows (11) is arranged on the baffle plate.

7. The automatic rapid pressure regulating valve for aerospace according to claim 6, wherein: the shell liner (10) is of an annular structure and has a closing-in structure at the end close to the pressing plate (12).

8. The automatic rapid pressure regulating valve for aerospace according to claim 7, wherein: the outer shell is formed by connecting an air inlet shell (1) and an air outlet shell (2).

9. The automatic rapid pressure regulating valve for aerospace according to claim 8, wherein: the sealing between the inner shell (9) and the air inlet shell (1), the sealing between the inner shell (9) and the air outlet shell (2) and the sealing between the shell lining (10) and the inner shell (9) are respectively realized through the first sealing ring (3), the second sealing ring (4) and the third sealing ring (5).