An anti-interference high-precision thrust testing device for solid rocket motor gas valves

Abstract

This invention provides a high-precision thrust testing device for solid rocket motor gas valves, comprising: a test bench, a swinging device, an air intake device, and a positioning device. The swinging device is fixed on a horizontally placed test bench, and the air intake device is mounted on the swinging device, which can swing at a certain angle in a vertical plane under the drive of the swinging device. The positioning device is used for positioning the gas valve and measuring the thrust, ensuring that the axis of the gas valve is perpendicular to the test bench. Gas enters the gas valve from the air intake device, and a pressure measuring device is installed on the air intake device to measure the intake pressure of the gas valve. This high-precision thrust testing device solves the problems of low accuracy, complex structure, and poor anti-disturbance performance of existing thrust testing devices.

Description

Technical Field

[0001] This invention relates to an interference-resistant, high-precision thrust testing device for solid rocket motor gas valves. Background Technology

[0002] Thrust magnitude and response characteristics are both important performance indicators for gas valves. When an engine performs pitch, yaw, or roll maneuvers, multiple gas valves need to be coupled and linked together, thus requiring high consistency in their performance. To ensure engine reliability and performance consistency, the thrust performance of the gas valves needs to be evaluated under cold air conditions.

[0003] Currently used thrust testing devices measure large forces but have low accuracy, complex structures, and low testing efficiency. Therefore, for small-thrust continuously adjustable gas valves in the hundreds of Newtons range, there is an urgent need to develop a high-precision, interference-resistant thrust testing device. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the shortcomings of the prior art and provide an anti-interference high-precision thrust testing device for solid rocket motor gas valves, which solves the problems of low accuracy, complex structure and poor anti-disturbance of existing thrust testing devices.

[0005] The technical solution of this invention is:

[0006] An anti-interference high-precision thrust testing device for solid rocket motor gas valves includes: a test bench, a swing device, an air intake device, and a positioning device;

[0007] The swing device is fixed on a horizontally placed test bench, and the air intake device is installed on the swing device. When the gas valve generates thrust, the air intake device can swing around the swing device at a certain angle in the vertical plane. The positioning device is used for positioning the gas valve and measuring the thrust, so that the axis of the gas valve is perpendicular to the test bench. Gas enters the gas valve from the air intake device, and a pressure measuring device is installed on the air intake device to measure the air intake pressure of the gas valve.

[0008] Furthermore, the surface of the test bench is a horizontal plane, on which multiple parallel grooves are provided.

[0009] Furthermore, the swinging device includes a fixed bracket and a ball bearing;

[0010] The fixed bracket is fixed in the slide groove on the surface of the test bench, and the ball bearing is fixed above the fixed bracket. The ball bearing has an inner hole, and the air intake device is connected to the inner hole of the ball bearing.

[0011] Furthermore, the air intake device includes a fixing nut, a gas pipeline, an air collection chamber, an air collection end cap, and a pressure sensor;

[0012] The gas pipeline passes through the inner hole of the ball bearing and is limited by a fixing nut. The gas pipeline can swing around the ball bearing at a certain angle in the vertical plane. One end of the gas pipeline is connected to the gas collecting chamber, and the other end is used for gas inlet. The gas collecting head is fixed to the gas collecting chamber. The pressure sensor is fixed to the gas collecting head and is used to measure the gas inlet pressure of the gas valve. The outer surface of the gas collecting head extends out of the flange for installing the gas valve.

[0013] Furthermore, the positioning device includes a positioning rod, an adapter, a force sensor, an adjustment bracket, and a base;

[0014] The gas valve is fixed to the outer surface of the gas collecting head and extends onto the flange; the positioning rod is vertically set, with its upper end threaded to the gas valve and its lower end threaded to the adapter; the lower end of the force sensor is fixed to the adjusting bracket, and its upper end is threaded to the adapter; the adjusting bracket is threaded to the base and its height is adjustable; the base is fixed to the test bench.

[0015] Furthermore, the positioning rod and the outlet of the gas valve are in a straight line.

[0016] Furthermore, the gas pipeline has a shoulder on one side of the tangent surface with the ball bearing to axially position the ball bearing, and a fixing nut is used on the other side to axially position the ball bearing.

[0017] Furthermore, one end of the positioning rod is threaded to the bottom of the gas valve, and the other end is threaded to the adapter, thereby ensuring that the outlet of the gas valve and the center line of the force sensor are on a vertical straight line.

[0018] Furthermore, the adjusting bracket can drive the force sensor to adjust its height as needed.

[0019] Furthermore, before the test, the height of the adjustment bracket is adjusted to keep the gas pipeline horizontal; during the force measurement, the gas source is connected to the gas pipeline, and the cold air is sprayed out from the outlet above the gas valve through the gas collecting chamber and the gas collecting head. The thrust of the gas valve is measured by the force sensor.

[0020] The advantages of this invention compared to the prior art are:

[0021] This invention is interference-resistant and highly accurate. It uses a positioning rod to ensure that the outlet of the gas valve and the center line of the force sensor are on a straight line, allowing for individual force measurement of each gas valve, improving force measurement accuracy and reducing external interference. The structure is simplified, reducing the number of operational steps in the test process and realizing efficient and streamlined testing. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the structure of a high-precision thrust testing device for solid rocket motor gas valves provided by the present invention.

[0023] Figure 2 This is a partial cross-sectional view of the structure of a high-precision thrust testing device for solid rocket motor gas valves provided by the present invention. Detailed Implementation

[0024] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0025] like Figure 1 and Figure 2 As shown, the present invention proposes an anti-interference high-precision thrust testing device for solid rocket motor gas valves, comprising: a test bench 1, a swing device, an air intake device, and a positioning device;

[0026] The swing device is fixed on the horizontally placed test bench 1, and the air intake device is installed on the swing device. The air intake device can swing at a certain angle in the vertical plane under the drive of the swing device. The positioning device is used for positioning the gas valve 8 and measuring the thrust, so that the axis of the gas valve 8 is perpendicular to the test bench 1. Gas enters the gas valve 8 from the air intake device. The air intake device is equipped with a pressure measuring device to measure the air intake pressure of the gas valve 8.

[0027] The surface of the test bench 1 is a horizontal plane, and multiple parallel sliding grooves are provided on it.

[0028] The swing device includes a fixed bracket 2 and a ball bearing 3; the fixed bracket 2 is fixed in a groove on the surface of the test bench 1, the ball bearing 3 is fixed above the fixed bracket 2, the ball bearing 3 has an inner hole, and the air intake device is connected to the inner hole of the ball bearing 3.

[0029] The air intake device includes a fixing nut 4, a gas pipe 5, a gas collecting chamber 6, a gas collecting head 7, and a pressure sensor 14. The gas pipe 5 passes through the inner hole of the ball bearing 3 and is limited by the fixing nut 4. The gas pipe 5 can swing around the ball bearing 3 at a certain angle in the vertical plane. One end of the gas pipe 5 is connected to the gas collecting chamber 6, and the other end is used for air intake. The gas collecting head 7 is fixedly connected to the gas collecting chamber 6. The pressure sensor 14 is fixedly connected to the gas collecting head 7 and is used to measure the intake pressure of the gas valve 8. The outer surface of the gas collecting head 7 extends out a flange for installing the gas valve 8.

[0030] The positioning device includes a positioning rod 9, an adapter 10, a force sensor 11, an adjusting bracket 12, and a base 13; the gas valve 8 is fixedly connected to the outer surface of the gas collecting head 7 extending onto the flange; the positioning rod 9 is vertically arranged, with its upper end threadedly connected to the gas valve 8 and its lower end threadedly connected to the adapter 10; the lower end of the force sensor 11 is fixedly connected to the adjusting bracket 12, and its upper end is threadedly connected to the adapter 10; the adjusting bracket 12 is threadedly connected to the base 13, allowing for height adjustment; the base 13 is fixedly connected to the test bench 1.

[0031] The positioning rod 9 and the outlet of the gas valve 8 are in a straight line. The gas pipeline 5 has a shoulder on one side of the tangent surface to the ball bearing 3 for axial positioning of the ball bearing 3, and a fixing nut 4 is used to axially position the ball bearing 3 on the other side.

[0032] One end of the positioning rod 9 is threaded to the bottom of the gas valve 8, and the other end is threaded to the adapter 10, thereby ensuring that the outlet of the gas valve 8 and the center line of the force sensor 11 are on a vertical straight line. The adjusting bracket 12 can drive the force sensor 11 to adjust its height as needed.

[0033] Example:

[0034] For ease of description, Figure 2 The orientation is defined by four directions: up, down, left, and right, such as... Figure 1 As shown, the present invention provides an anti-interference high-precision thrust testing device for solid rocket motor gas valves, comprising: a test bench 1, a swing device, an air intake device, and a positioning device.

[0035] The swing device includes: a fixed support 2 fixedly connected to the test bench 1; a ball bearing 3 fixedly connected to the fixed support 2, the ball bearing 3 having an inner hole; a gas pipe 5 in the air intake device passing through the inner hole and limited by a fixing nut 4; a gas collecting chamber 6 fixedly connected to one end of the gas pipe 5, the other end for air intake; a gas collecting head 7 fixedly connected to the gas collecting chamber 6; a pressure sensor 14 fixedly connected to the gas collecting head 7; a flange extending from the outer surface of the gas collecting head 7, the gas valve 8 in the positioning device fixedly connected to the flange; a positioning rod 9 with one end threadedly connected to the gas valve 8, and the other end threadedly connected to an adapter 10; a force sensor 11 fixedly connected to an adjusting bracket 12, the other end threadedly connected to the adapter 10; the adjusting bracket 12 and a base 13 threadedly connected, adjustable in height; the base 13 fixedly connected to the test bench 1.

[0036] The gas pipeline 5 has a shoulder on one side of its tangential surface with the ball bearing 3 for axial positioning of the ball bearing 3, and a fixing nut 4 on the other side for axial positioning of the ball bearing 3. The gas pipeline 5 can swing around the ball bearing 3 at a certain angle in the vertical plane, further allowing the gas valve to displace vertically when the thrust changes, thereby changing the force applied to the force sensor. One end of the positioning rod 9 is threaded to the bottom of the gas valve 8, and the other end is threaded to the adapter 10. The adapter 10 is threaded to the force sensor 11, thus ensuring that the center lines of the outlet of the gas valve 8, the positioning rod 9, the adapter 10, and the force sensor 11 are on a vertical straight line.

[0037] The adjusting bracket 12 and the base 13 are threaded together. Before the test, the height of the adjusting bracket 12 is adjusted to keep the gas pipeline 5 horizontal. During force measurement, the gas source is connected to the gas pipeline 5, and cold air is ejected from the outlet above the gas valve 8 through the gas collecting chamber 6 and the gas collecting end cap 7. Because the center lines of the positioning rod 9, the adapter 10, and the force sensor 11 are on the same vertical straight line, the force sensor 11 can accurately measure the thrust of the gas valve 8.

[0038] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0039] The parts of this invention not described in detail are common knowledge to those skilled in the art.

Claims

1. An anti-interference high-precision thrust testing device for a solid engine gas valve, characterized in that, The utility model relates to a test bench for testing the swing of gas valve, comprising: a test bench (1), a swing device, an air inlet device and a positioning device; the swing device is fixed on the horizontally placed test bench (1), the air inlet device is installed on the swing device and is connected with the gas valve (8), when the gas valve generates thrust, the air inlet device can swing in a vertical plane by a certain angle around the swing device; the positioning device is used for positioning the gas valve (8) and measuring the thrust, so that the axis of the gas valve (8) is perpendicular to the test bench (1); gas enters the gas valve (8) from the air inlet device, and a pressure measuring device is arranged on the air inlet device and is used for measuring the inlet pressure of the gas valve (8); the swing device comprises a fixed support (2) and a ball bearing (3); the fixed support (2) is fixed in a sliding groove on the surface of the test bench (1), the ball bearing (3) is fixed above the fixed support (2), the ball bearing (3) has an inner hole, and the air inlet device is connected in the inner hole of the ball bearing (3); the air inlet device comprises a fixed nut (4), a gas pipeline (5), a gas collecting cavity (6), a gas collecting head (7) and a pressure measuring sensor (14); the gas pipeline (5) is fixed by the fixed nut (4) through the inner hole of the ball bearing (3), the gas pipeline (5) can swing in a vertical plane by a certain angle around the ball bearing (3); one end of the gas pipeline (5) is connected to the gas collecting cavity (6), and the other end is used for air inlet; the gas collecting head (7) is fixedly connected to the gas collecting cavity (6); the pressure measuring sensor (14) is fixedly connected to the gas collecting head (7) and is used for measuring the inlet pressure of the gas valve (8); the outer surface of the gas collecting head (7) extends a flange plate for installing the gas valve (8).

2. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 1, characterized in that: The surface of the test bench (1) is a horizontal plane, and a plurality of parallel sliding grooves are arranged on the horizontal plane.

3. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 1, characterized in that: the positioning device comprises a positioning rod (9), an adapter (10), a force measuring sensor (11), an adjusting bracket (12) and a base (13); the gas valve (8) is fixedly connected to the flange plate extending from the outer surface of the gas collecting head (7); the positioning rod (9) is vertically arranged, the upper end of the positioning rod (9) is threadedly connected with the gas valve (8), and the lower end of the positioning rod (9) is threadedly connected with the adapter (10); the lower end of the force measuring sensor (11) is fixedly connected to the adjusting bracket (12), and the upper end of the force measuring sensor (11) is threadedly connected with the adapter (10); the adjusting bracket (12) is threadedly connected with the base (13) and can adjust the height; and the base (13) is fixedly connected to the test bench (1).

4. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 3, characterized in that: The outlet of the gas valve (8) and the positioning rod (9) are on a straight line.

5. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 1, characterized in that: The gas pipeline (5) has a shaft shoulder on one side of the tangent plane of the ball bearing (3) for axial positioning of the ball bearing (3), and the other side of the ball bearing (3) is axially positioned by the fixed nut (4).

6. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 3, characterized in that: One end of the positioning rod (9) is threadedly connected with the bottom of the gas valve (8), and the other end of the positioning rod (9) is threadedly connected with the adapter (10), so that the outlet of the gas valve (8) and the center line of the force measuring sensor (11) are on a vertical straight line.

7. The anti-interference high-precision thrust testing device for the gas valve of the solid engine according to claim 3, characterized in that: The adjusting bracket (12) can adjust the height position of the force measuring sensor (11) as required.

8. The anti-interference high-precision thrust test device for the gas valve of the solid engine according to claim 3, characterized in that: Before the test, the height of the adjusting bracket (12) is adjusted so that the gas pipeline (5) is kept horizontal; when the force is measured, the gas source is connected to the gas pipeline (5), the cold gas passes through the gas collecting cavity (6) and the gas collecting head (7), is sprayed out from the outlet above the gas valve (8), and the thrust of the gas valve (8) is measured by the force sensor (11).

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