CN-121977101-A - High-flow accurate pressure regulating device for air chamber load

Abstract

The invention provides a high-flow accurate pressure regulating device for air chamber load, which comprises a valve body, a valve core, a valve cover, a flow equalizing piece and a piston, wherein the valve cover comprises an outer sleeve and the piston, the valve body comprises an air inlet inclined cavity and an air outlet cavity, the valve body is in threaded connection with the valve core, the top of the valve cover is connected with control air provided by a driving air pressure regulating valve, so that the whole pressure regulating device is formed.

Inventors

• MA BAIHE
• ZHU XINGYING
• LIU XIANG
• YANG ZHONGKAI
• HAN CHUNHUA
• LIU GUAN
• CHEN YANBING

Assignees

• 中国航天空气动力技术研究院

Dates

Publication Date

20260505

Application Date

20260227

Claims (10)

1. 1. The high-flow accurate pressure regulating device for the air chamber load is characterized by comprising a driving air pressure regulating valve, a valve cover, a valve body and a valve core which are sequentially assembled from top to bottom, wherein an air outlet of the driving air pressure regulating valve is communicated with an air inlet at the top end of the valve cover, and the valve core is assembled in an inner cavity of the valve body; The valve body comprises a disc, a flow equalization piece and a first shell, wherein a first groove is formed in the bottom of the first shell, a downward-inclined air inlet inclined cavity and an upward-inclined air outlet inclined cavity are formed in two sides of the first shell respectively, a second groove is formed in the top end of the first shell, the disc can be axially and slidably arranged in the second groove, the flow equalization piece is arranged between the first groove and the second groove, and a central hole is formed in the flow equalization piece; The valve core comprises a valve rod and a second shell, the second shell is mounted in the first groove in a sealing mode, a first blind hole is formed in the top end of the second shell, a plurality of waist-shaped holes communicated with the first blind hole are formed in the side wall of the second shell in the circumferential direction, the height position of each waist-shaped hole corresponds to the height position of the inclined air inlet cavity, a spring is placed in the first blind hole, the bottom end of the valve rod is in butt joint with the spring through a base, the base is in sliding sealing mode in the first blind hole, a sealing gasket is mounted on the outer side of the valve rod on the top end of the base, and a locking nut used for limiting the sealing gasket is mounted on the top end of the second shell.
2. 2. The high-flow accurate pressure regulating device for air chamber load according to claim 1, wherein a first sealing ring is installed on the outer wall of the base, the position of the first sealing ring is lower than that of the waist-shaped hole, a second sealing ring is installed on the outer wall of the second shell, and the position of the second sealing ring is located between the air inlet inclined cavity and the air outlet inclined cavity.
3. 3. The high-flow accurate pressure regulating device for air chamber load according to claim 1, wherein the outer sleeve is connected with the first shell through bolts, and the edge of the diaphragm is pressed at the joint of the outer sleeve and the first shell.
4. 4. The high-flow precise pressure regulating device for the air chamber load of claim 1, wherein a threaded hole is reserved at the top end of the outer sleeve, and an air outlet of the driving air pressure regulating valve is connected with the threaded hole through a filler neck.
5. 5. The high-flow accurate pressure regulating device for air chamber load according to claim 1, wherein the axes of the air inlet inclined cavity and the air outlet inclined cavity are parallel to each other.
6. 6. The high-flow accurate pressure regulating device for air chamber load according to claim 1, wherein the sealing gasket is made of reinforced nylon, polyether-ether-ketone or polyimide materials.
7. 7. The high-flow, accurate pressure regulating device for a load of a gas cell according to claim 1, wherein the center position of the diaphragm is thinner than the edge position.
8. 8. The high-flow precise pressure regulating device for the air chamber load according to claim 1, wherein the diameters of small holes around the flange at the upper end of the flow equalizing piece are 0.5-2mm, and the number of the small holes is 2-40.
9. 9. The high-flow precise pressure regulating device for air chamber load according to claim 1, wherein the number of the waist-shaped holes on the second shell is 4-8.
10. 10. The high-flow precise pressure regulating device for air chamber load according to claim 1, wherein a stepped flange structure is arranged in the lower area of the valve rod, external threads matched with the base are arranged on a cylindrical section below the stepped flange structure, a second blind hole is formed in the bottom end of the valve rod, a side hole communicated with the second blind hole is formed in the side face of the valve rod, and the side hole is communicated with the first groove.

Description

High-flow accurate pressure regulating device for air chamber load Technical Field The invention relates to the technical field of pressure regulating devices, in particular to a high-flow accurate pressure regulating device for air chamber load. Background The plasma arc heater utilizes an arc to heat gas to generate a large-scale simulation experiment device on the ground, which has the temperature of thousands of to tens of thousands of air flows, is used for simulating the heating process of compressed high-temperature gas in front of an aircraft on the aircraft during ultra-high speed flight, is especially used for measuring the performance of heat-proof materials and heat-proof systems, is the only experimental tool which can continuously generate the temperature and pressure of the air flows close to the actual air flows in the flight so far, and plays an important role in aerospace industry. The arc wind tunnel has high enthalpy, high heat flow, long-time high altitude laminar flow simulation capability, and is one of important ground test equipment for performing hypersonic aircraft heat protection and thermal structure test examination. During wind tunnel operation, high-pressure air flows through the arc heater to heat, the high-temperature jet flow is formed through expansion acceleration of the jet pipe, an ablation test is carried out on a test piece arranged at the outlet of the jet pipe, the tested test piece enters the diffuser to decelerate, and the test piece enters the vacuum container after being cooled to normal temperature through the cooler. In the field of aerospace, high-pressure air is ionized through an arc wind tunnel to generate high-temperature high-speed air flow, so that the simulation of a high-speed aircraft high-aerodynamic heat environment is realized, and stable air flow needs to be provided for the arc wind tunnel. However, the traditional arc wind tunnel pressure regulating valve is complex in structure, long in pressure stability response time and insufficient in maximum air supply amount, and cannot meet the test requirement. Therefore, developing a novel voltage regulator to solve the above-mentioned problems is a technical problem that needs to be solved by those skilled in the art. Disclosure of Invention The invention aims to provide a high-flow accurate pressure regulating device for air chamber load, which overcomes the defects of long pressure regulating response time, low stability and insufficient flow of the traditional pressure regulating valve. According to the purpose, the invention provides a high-flow accurate pressure regulating device for air chamber load, which comprises a driving air pressure regulating valve, a valve cover, a valve body and a valve core, wherein the driving air pressure regulating valve, the valve cover, the valve body and the valve core are sequentially assembled from top to bottom; The valve body comprises a disc, a flow equalization piece and a first shell, wherein a first groove is formed in the bottom of the first shell, a downward-inclined air inlet inclined cavity and an upward-inclined air outlet inclined cavity are formed in two sides of the first shell respectively, a second groove is formed in the top end of the first shell, the disc can be axially and slidably arranged in the second groove, the flow equalization piece is arranged between the first groove and the second groove, and a central hole is formed in the flow equalization piece; The valve core comprises a valve rod and a second shell, the second shell is mounted in the first groove in a sealing mode, a first blind hole is formed in the top end of the second shell, a plurality of waist-shaped holes communicated with the first blind hole are formed in the side wall of the second shell in the circumferential direction, the height position of each waist-shaped hole corresponds to the height position of the inclined air inlet cavity, a spring is placed in the first blind hole, the bottom end of the valve rod is in butt joint with the spring through a base, the base is in sliding sealing mode in the first blind hole, a sealing gasket is mounted on the outer side of the valve rod on the top end of the base, and a locking nut used for limiting the sealing gasket is mounted on the top end of the second shell. Further, a first sealing ring is arranged on the outer wall of the base, the position of the first sealing ring is lower than that of the waist-shaped hole, a second sealing ring is arranged on the outer wall of the second shell, and the position of the second sealing ring is located between the air inlet inclined cavity and the air outlet inclined cavity. Further, the edge of the membrane is pressed at the joint of the outer sleeve and the first shell. Further, a threaded hole is reserved at the top end of the outer sleeve, and an air outlet of the driving air pressure regulating valve is connected with the threaded hole through a filler neck. Further, the axes o