Measuring valve testing device

Abstract

The invention discloses a metering valve testing device which is used for accurately testing the magnitude of friction force borne by a metering valve in the working process. According to the technical scheme, the metering valve testing device comprises a top frame, a bottom frame, a cross-shaped sliding table, a linear motor, a force sensor, a connecting rod, a metering valve and a lining tool, the top frame is connected with the bottom frame, the cross-shaped sliding table is installed on the top frame, and the linear motor is installed on the lining tool. The cross-shaped sliding table is connected with the linear motor and drives the linear motor to move in the vertical direction and the horizontal direction, the lining tool is installed on the bottom frame, the lining is fixedly installed on the lining tool, the metering valve is matched with the lining and connected with the linear motor through the connecting rod, and the force sensor is arranged between the connecting rod and the linear motor. The positions of the linear motor in the horizontal direction and the vertical direction are adjusted through the cross-shaped sliding table, so that a connecting rod between the linear motor and the metering valve and the metering valve have good centering performance, and the influence of radial force on a test result in a friction force test is eliminated.

Description

Technical Field

[0001] The invention belongs to the technical field of metering valve testing, and in particular relates to a metering valve testing device. Background Art

[0002] The metering valve in an aircraft engine is a key component in the aircraft engine. The metering valve will be disturbed by friction during operation. In addition to being related to the material of the valve itself, whether rubber rings and plastic rings are installed, and the matching clearance, the friction is also affected by working conditions such as temperature and speed. When working, the valve is immersed in aviation kerosene. Under special working conditions in the aerospace field, the working environment temperature is generally high. Due to changes in the working environment, the friction of the metering valve will also change, which will affect the performance of the metering valve. Existing friction test methods are difficult to eliminate the interference of radial force and working environment on the friction test results. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a metering valve testing device, which aims to solve the problem of the influence of the working environment and the radial force generated during the test on the friction test results, so as to accurately test the magnitude of the friction force exerted on the metering valve during work.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a metering valve testing device, including a top frame, a bottom frame, a cross slide, a linear motor, a force sensor, a connecting rod, a metering valve and a bushing tooling, the top frame is connected to the bottom frame, the cross slide is installed on the top frame, the cross slide is connected to the linear motor and drives the linear motor to move in vertical and horizontal directions, the bushing tooling is installed on the bottom frame, the bushing is fixedly installed on the bushing tooling, the metering valve cooperates with the bushing and is connected to the linear motor through the connecting rod, and the force sensor is arranged between the connecting rod and the linear motor.

[0005] It also includes a heat-conducting oil barrel and a heat-exchange shell. The heat-conducting oil barrel is sealed with the base frame. The heat-exchange shell is sealed and installed in the heat-conducting oil barrel. The bushing tooling is installed in the heat-exchange shell. The side wall of the heat-exchange shell is provided with a heat-conducting sheet.

[0006] The bushing tooling comprises a bushing tooling frame and a bushing tooling cover. The bushing tooling cover is fixedly connected to the heat exchange shell and abuts against the bushing tooling frame. Through holes are provided on the side walls of the bushing tooling frame and the bushing tooling cover.

[0007] The upper end of the bushing fixture frame has a fan-shaped through hole, and the bushing fixture cover has a through hole in the projection surface of the fan-shaped through hole. The temperature sensor passes through the through hole of the bushing fixture cover and the fan-shaped through hole and extends into the heat exchange shell.

[0008] The bottom frame is provided with a T-slot platform, and the heat-conducting oil barrel is connected to the T-slot platform.

[0009] The heat transfer oil barrel is provided with a liquid level gauge.

[0010] The top frame is connected to the synchronous lifting platform, and the synchronous lifting platform drives the top frame and the cross slide to move up and down.

[0011] Beneficial effects of the present invention: 1) By setting up a cross slide and a linear motor, the cross slide is used to adjust the horizontal and vertical positions of the linear motor, so that the connecting rod between the linear motor and the metering valve and the metering valve have good centering, eliminating the influence of radial force on the test results in the friction test.

[0012] 2) By setting up a heat transfer oil barrel and a heat exchange shell, the actual working environment of the metering valve is simulated. The metering valve is in the oil and is affected by high temperature, making the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a front view of the present invention; Figure 2 is a side view of the present invention; Figure 3 is a schematic diagram of a heat exchange shell of the present invention; Figure 4 This is a top view of the bushing fixture of the present invention: In the figure: 1. top frame; 2. bottom frame; 3. cross slide; 4. linear motor; 5. force sensor; 6. connecting rod; 7. metering valve; 8. bushing; 9. thermal oil barrel; 10. heat exchange shell; 11. heat conductive plate; 12. bushing fixture frame; 13. bushing fixture cover; 14. fan-shaped through hole; 15. temperature sensor; 16. T-slot table; 17. synchronous lifting platform. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments. Example

[0016] like Figure 1 to Figure 2As shown, the present invention provides a metering valve testing device, including a top frame 1, a bottom frame 2, a cross slide 3, a linear motor 4, a force sensor 5, a connecting rod 6, a metering valve 7 and a bushing fixture, wherein the top frame 1 is connected to the bottom frame 2, the cross slide 3 is installed on the top frame 1, the cross slide 3 is connected to the linear motor 4 and drives the linear motor 4 to move in vertical and horizontal directions, the bushing fixture is installed on the bottom frame 2, the bushing 8 is fixedly installed on the bushing fixture, the metering valve 7 cooperates with the bushing 8 and is connected to the linear motor 4 through the connecting rod 6, and the force sensor 5 is arranged between the connecting rod 6 and the linear motor 4.

[0017] Specifically, the horizontal and vertical positions of the linear motor 4 are adjusted by adjusting the cross slide 3, so that the connecting rod 6 between the linear motor 4 and the metering valve 7 and the metering valve 7 have good concentricity. The linear motor 4 drives the metering valve 7 to reciprocate up and down. By observing the return value of the force sensor 5, when the friction force is the smallest at a certain position, it is considered that the influence of the radial force is eliminated. Multiple tests are performed at this position, and the measurement results obtained are more accurate.

[0018] Furthermore, in order to expand the adjustment range, the top frame 1 is connected to a synchronous lifting platform 17, and the synchronous lifting platform 17 drives the top frame 1 and the cross slide 3 to move up and down. Example

[0019] like Figures 1 to 4 As shown, the device further includes a heat transfer oil barrel 9 and a heat exchange shell 10, wherein the heat transfer oil barrel 9 is sealedly connected to the base frame 2, the heat exchange shell 10 is sealedly installed in the heat transfer oil barrel 9, the bushing tool is installed in the heat exchange shell 10, and a heat transfer sheet 11 is provided on the side wall of the heat exchange shell 10. Under the working conditions in the special field of aerospace, the metering valve 7 is immersed in aviation kerosene and the working environment temperature is generally high. By setting the heat transfer oil barrel 9 and the heat exchange shell 10, the actual working environment of the metering valve 7 is simulated.

[0020] Specifically, the bushing tooling includes a bushing tooling frame 12 and a bushing tooling cover 13. The bushing tooling cover 13 is fixedly connected to the heat exchange shell 10 and abuts the bushing tooling frame 12. The side walls of the bushing tooling frame 12 and the bushing tooling cover 13 are both provided with through holes to ensure smooth flow of oil and avoid throttling effect of the metering valve 7 during movement. The bushing tooling frame 12 has a fan-shaped through hole 14 at the upper end, and the bushing tooling cover 13 has a through hole in the projection surface of the fan-shaped through hole 14. The temperature sensor 15 passes through the through hole of the bushing tooling cover 13 and the fan-shaped through hole 14 and extends into the heat exchange shell 10. In order to facilitate installation and disassembly, two handles can be provided on the bushing tooling cover 13. In order to facilitate observation of the oil volume, the heat transfer oil barrel 9 is provided with a liquid level gauge.

[0021] Since the metering valve 7 is placed vertically and immersed in aviation kerosene during the test, the influence of gravity and buoyancy of the metering valve 7 needs to be eliminated before the test. For this reason, the mass and volume are input into the upper computer software system before the test to compensate for gravity and buoyancy when calculating the friction force. The friction force on the metering valve in the present invention is calculated by the following formula: F f =FF G cosθ+F 浮 cosθ F f Where is the friction force of the metering valve, F is the return value of the force sensor, and F G is the weight of the valve and connecting rod, F 浮 is the buoyancy of the valve, and θ is the angle between the force direction and the vertical direction.

[0022] Furthermore, in order to better ensure the good centering of the connecting rod 6 and the metering valve 7 between the linear motor 4 and the metering valve 7, the base frame 2 is provided with a T-slot table 16, and the thermal oil barrel 9 is connected to the T-slot table 16, and the thermal oil barrel 9 can change the installation position on the T-slot table 16.

[0023] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A metering valve testing device, comprising a top frame (1), a bottom frame (2), a cross slide (3), a linear motor (4), a force sensor (5), a connecting rod (6), a metering valve (7) and a bushing fixture, characterized in that: The top frame (1) is connected to the bottom frame (2), the cross slide (3) is mounted on the top frame (1), the cross slide (3) is connected to the linear motor (4) and drives the linear motor (4) to move in vertical and horizontal directions, the bushing fixture is mounted on the bottom frame (2), the bushing (8) is fixedly mounted on the bushing fixture, the metering valve (7) cooperates with the bushing (8) and is connected to the linear motor (4) through a connecting rod (6), and the force sensor (5) is arranged between the connecting rod (6) and the linear motor (4).

2. A metering valve testing device according to claim 1, characterized in that: It also includes a heat-conducting oil barrel (9) and a heat-exchange shell (10), wherein the heat-conducting oil barrel (9) is sealedly connected to the base frame (2), the heat-exchange shell (10) is sealedly installed in the heat-conducting oil barrel (9), the bushing tooling is installed in the heat-exchange shell (10), and the side wall of the heat-exchange shell (10) is provided with a heat-conducting sheet (11).

3. A metering valve testing device according to claim 2, characterized in that: The bushing fixture comprises a bushing fixture frame (12) and a bushing fixture cover (13); the bushing fixture cover (13) is fixedly connected to the heat exchange shell (10) and abuts against the bushing fixture frame (12); and through holes are provided on the side walls of the bushing fixture frame (12) and the bushing fixture cover (13).

4. A metering valve testing device according to claim 3, characterized in that: The bushing fixture frame (12) has a fan-shaped through hole (14) at the upper end, and the bushing fixture cover (13) has a through hole in the projection surface of the fan-shaped through hole (14). The temperature sensor (15) passes through the through hole of the bushing fixture cover (13) and the fan-shaped through hole (14) and extends into the heat exchange shell (10).

5. A metering valve testing device according to claim 2, characterized in that: The base frame (2) is provided with a T-slot platform (16), and the heat transfer oil barrel (9) is connected to the T-slot platform (16).

6. A metering valve testing device according to claim 2, characterized in that: The heat transfer oil barrel (9) is provided with a liquid level gauge.

7. A metering valve testing device according to claim 1, characterized in that: The top frame (1) is connected to a synchronous lifting platform (17), and the synchronous lifting platform (17) drives the top frame (1) and the cross slide (3) to move up and down.

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