Electro-hydraulic servo valve vibration signal test tool

Abstract

The utility model discloses a vibration signal testing tool for an electro-hydraulic servo valve, and relates to the technical field related to valves. The device comprises a base and two clamping plates, the two symmetrically-distributed clamping plates are fixed to the upper end face of the base, a first vibration sensor is fixed to the corner of the upper end face of the base, a second vibration sensor is fixed to one end face of the base, and a third vibration sensor is fixed to one side face of the base. First screws are connected into the two ends of each clamping plate in a penetrating and threaded mode, and the tail ends of the first screws face the longitudinal center line of the base and are rotationally connected with clamping blocks. Through the arrangement of the base, the clamping plate, the clamping block, the second screw, the first screw, the fixing screw, the through hole, the first vibration sensor, the second vibration sensor and the third vibration sensor, the problem that a tool is single in clamping mode; in the prior art, the test tool can not satisfy the vibration signal test of the electro-hydraulic servo valve in different states, and the vibration signal test effect of a single position is not good.

Description

Technical Field

[0001] This utility model belongs to the field of valve-related technology, and in particular relates to a vibration signal testing fixture for an electro-hydraulic servo valve. Background Technology

[0002] An electro-hydraulic servo valve is a control element that converts weak electrical signals into high-power hydraulic signals. It is primarily used for precise control of the speed, pressure, and force of hydraulic cylinders. Its core advantage lies in its ability to continuously adjust flow rate (from zero to rated value) or pressure, rather than a simple "on / off" binary control. As a key component of electro-hydraulic servo control systems, it directly affects the system's dynamic response speed, control accuracy, and reliability, and has been widely used in high-end fields such as aerospace, shipbuilding, metallurgy, and nuclear power. The electro-hydraulic servo valve receives electrical signals to drive internal mechanical structures (such as torque motors and jet pipes), changing the valve core position to regulate the flow and pressure of hydraulic oil, ultimately controlling the movement of the actuator (such as a hydraulic cylinder). Before assembly, it needs to undergo certain tests, such as vibration signal testing, to observe its behavior under vibration. However, actual vibration signal testing still has the following drawbacks:

[0003] Electro-hydraulic servo valves are used as control elements to control hydraulic oil. When testing vibration signals, they require appropriate tooling. However, when clamping electro-hydraulic servo valves with conventional tooling, they are usually clamped and positioned in only one direction. This may still cause positional deviation during subsequent vibration signal testing, resulting in inaccurate vibration signal test data.

[0004] Secondly, the vibration signal level of the electro-hydraulic servo valve is inconsistent when it is energized and has oil, and when it is de-energized and has no oil. Both test conditions must be met.

[0005] Finally, the transmission of vibration signals varies at different locations, so testing vibration signals at a single location is not very effective. Utility Model Content

[0006] The purpose of this utility model is to provide a vibration signal testing fixture for electro-hydraulic servo valves. By setting up a base, clamping plate, clamping block, screw two, screw one, fixing screw, through hole, vibration sensor one, vibration sensor two, and vibration sensor three, it solves the problems of the fixture having a single clamping method that needs to be strengthened, the test fixture being unable to meet the vibration signal testing of electro-hydraulic servo valves under different states, and the poor vibration signal testing effect at a single position.

[0007] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0008] This utility model is a vibration signal testing fixture for an electro-hydraulic servo valve, including a base and two clamping plates. Two clamping plates are fixed on the upper end face of the base in a symmetrical arrangement. A vibration sensor 1 is fixed at the corner of the upper end face of the base, a vibration sensor 2 is fixed on one end face of the base, and a vibration sensor 3 is fixed on one side of the base.

[0009] Each of the clamping plates has a screw threaded through at both ends. The tail end of the screw is rotatably connected to a clamping block facing the longitudinal center line of the base. An electro-hydraulic servo valve is placed on the base between the two clamping plates.

[0010] Furthermore, the vibration sensor one is located at the upper corner of the base above the vibration sensor two, and the vibration sensor three is located on the side of the base near the end edge of the vibration sensor two.

[0011] Furthermore, right-angled blocks are fixed on the opposite surfaces of the two clamping plates, and the maximum width of the electro-hydraulic servo valve is equal to the distance between the two right-angled blocks.

[0012] Furthermore, each of the clamps has two through holes, and the through holes correspond to the port positions on the electro-hydraulic servo valve.

[0013] Furthermore, a second screw is screwed through the clamp between the two through holes, and the tail end of the second screw faces the longitudinal center line of the base and abuts against the side of the electro-hydraulic servo valve.

[0014] Furthermore, four fixing screws arranged in a square pattern are screwed onto the upper part of the base, and the tail ends of the fixing screws pass through the ear plate on the electro-hydraulic servo valve and are screwed into the base. The distance between two fixing screws on the same horizontal line is less than the distance between two right-angle blocks, and the distance between two fixing screws on the same vertical line is less than the distance between two clamping blocks on the same clamping plate.

[0015] Furthermore, the side of the clamping block away from the clamping plate abuts against the side of the electro-hydraulic servo valve.

[0016] This utility model has the following beneficial effects:

[0017] This invention solves the problem of the single clamping method of the tooling, which needs to be strengthened, by setting up a base, clamping plates, clamping blocks, screw two, screw one, and fixing screws. The electro-hydraulic servo valve is placed above the base between the two clamping plates. First, the fixing screw is passed through the ear plate on the electro-hydraulic servo valve and fixed to the base to achieve a rigid connection. Then, screw one is rotated to make the clamping block tightly clamp the side of the electro-hydraulic servo valve. The four clamping blocks clamp and position the protrusion on the side of the electro-hydraulic servo valve to further maintain stability and increase the rigid connection. Finally, screw two is rotated to abut against the side of the electro-hydraulic servo valve to further strengthen the rigid connection and ensure the stability of subsequent vibration signal testing.

[0018] This invention solves the problem that the testing fixture cannot meet the vibration signal testing requirements of the electro-hydraulic servo valve under different conditions by setting up a clamping plate and a through hole. In the case of no oil and no electricity, the electro-hydraulic servo valve can be placed on the base and clamped and positioned by the auxiliary components on the clamping plate, and vibration signal testing can be performed. When the valve is oily and energized, the electro-hydraulic servo valve in the above state is energized, and its port is connected to the corresponding pipe. The pipe passes through the through hole and is connected to the port, and subsequent vibration signal testing can be performed.

[0019] This invention solves the problem of poor vibration signal testing results at a single location by setting up vibration sensor one, vibration sensor two, and vibration sensor three. Vibration sensor one is fixed at the corner of the upper surface of the base, vibration sensor two is fixed on one end surface of the base, and vibration sensor three is fixed on one side of the base. The setting of three vibration sensors allows for the detection and testing of vibration signals on multiple surfaces in multiple directions, resulting in more accurate test data. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 A three-dimensional view of a vibration signal testing fixture for an electro-hydraulic servo valve;

[0022] Figure 2 This is a structural diagram after the electro-hydraulic servo valve has been installed.

[0023] Figure 3 This is a structural diagram of the base and its associated components;

[0024] Figure 4 This is a structural diagram of the clamping plate and its associated components;

[0025] Figure 5 This is a structural diagram of an electro-hydraulic servo valve.

[0026] Figure label:

[0027] 1. Base; 101. Vibration sensor one; 102. Vibration sensor two; 103. Vibration sensor three; 104. Fixing screw; 2. Clamping plate; 201. Screw one; 2011. Clamping block; 202. Screw two; 203. Right angle block; 204. Through hole. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Please see Figure 1-5 As shown, this utility model is a vibration signal testing fixture for an electro-hydraulic servo valve, including a base 1 and two clamping plates 2. Two clamping plates 2 are fixed on the upper end face of the base 1 in a symmetrical arrangement. A vibration sensor 101 is fixed at the corner of the upper end face of the base 1, a vibration sensor 202 is fixed on one end face of the base 1, and a vibration sensor 303 is fixed on one side of the base 1.

[0030] Vibration sensor 101, vibration sensor 202, and vibration sensor 303 are sequentially placed on the upper end, end face, and side of the base 1 to detect vibration signals from three directions, making the vibration signal test more accurate.

[0031] Each clamping plate 2 has a screw 201 threadedly connected to both ends. The tail end of the screw 201 faces the longitudinal center line of the base 1 and is rotatably connected to a clamping block 2011. An electro-hydraulic servo valve is placed on the base 1 between the two clamping plates 2. The side of the clamping block 2011 away from the clamping plate 2 abuts against the side of the electro-hydraulic servo valve.

[0032] Place the electro-hydraulic servo valve to be tested on the base 1 between the two clamping plates 2, and then rotate screw 201 to bring the clamping block 2011 close to the electro-hydraulic servo valve and press it against it; complete the lateral clamping.

[0033] Vibration sensor 101 is located at the upper corner of the base 1 above vibration sensor 2 102, and vibration sensor 3 103 is located on the side of the base 1 near the end edge of vibration sensor 2 102.

[0034] Vibration sensor 101, vibration sensor 202, and vibration sensor 303 are distributed at different locations to detect vibration signals in the X, Y, and Z axis directions.

[0035] Right-angled blocks 203 are also fixed on the opposite surfaces of the two clamping plates 2. The maximum width of the electro-hydraulic servo valve is equal to the distance between the two right-angled blocks 203.

[0036] The setting of right-angle block 203 first involves positioning the electro-hydraulic servo valve to avoid excessive positional deviation.

[0037] Each clamping plate 2 also has two through holes 204, and the through holes 204 correspond to the pipe opening positions on the electro-hydraulic servo valve.

[0038] The through hole 204 is designed to facilitate the connection of external oil pipelines through the through hole 204 to the port of the electro-hydraulic servo valve, making it convenient to conduct oil-containing vibration tests under power.

[0039] A screw 202 is screwed through the clamping plate 2 between the two through holes 204, and the tail end of the screw 202 faces the longitudinal center line of the base 1 and abuts against the side of the electro-hydraulic servo valve.

[0040] Rotate screw 202 until the tail end of screw 202 presses against the side of the electro-hydraulic servo valve to further increase stability and strengthen the rigid connection effect.

[0041] Four fixing screws 104 arranged in a square frame are screwed on the base 1. The tail ends of the fixing screws 104 pass through the ear plate on the electro-hydraulic servo valve and are screwed into the base 1. The distance between two fixing screws 104 on the same horizontal line is less than the distance between two right-angle blocks 203. The distance between two fixing screws 104 on the same vertical line is less than the distance between two clamping blocks 2011 on the same clamping plate 2.

[0042] After placing the electro-hydraulic servo valve above the base 1, first pass the fixing screw 104 through the ear plate on it and then screw it into the base 1 to complete the initial fixation in the vertical direction; the position of the fixing screw 104 does not affect the normal clamping operation of the clamping block 2011, etc.

[0043] The specific working principle of this utility model is as follows: First, the electro-hydraulic servo valve is placed above the base 1, between the two right-angle blocks 203. The electro-hydraulic servo valve is first positioned. Then, the fixing screw 104 is passed through the ear plate on the electro-hydraulic servo valve and fixed to the base 1 to achieve a rigid connection, completing the initial vertical fixation. Next, the screw 201 is rotated to bring the clamping block 2011 close to the electro-hydraulic servo valve and abut against it, completing the horizontal clamping. Finally, the screw 202 is rotated until the tail end of the screw 202 abuts against the side of the electro-hydraulic servo valve. To further enhance stability and strengthen the rigid connection effect, vibration sensors 101, 102, and 103 are sequentially installed on the upper end, end face, and side of the base 1 to simultaneously detect vibration signals in the X, Y, and Z axes, obtaining more accurate data. In the absence of oil and electricity, the above operations can be completed before testing. When the base is oiled and energized, the electro-hydraulic servo valve in the above state is energized, and its port is connected to the corresponding pipe. The pipe passes through the through hole 204 and connects to the port, allowing subsequent vibration signal testing to proceed.

[0044] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications, equivalent substitutions, or improvements made to the technical solutions described in the foregoing embodiments, or to some of the technical features, shall fall within the protection scope of the present utility model.

Claims

1. A vibration signal testing fixture for an electro-hydraulic servo valve, comprising a base (1) and two clamping plates (2), characterized in that: Two symmetrically distributed clamps (2) are fixed on the upper end face of the base (1), and a vibration sensor one (101) is fixed at the corner of the upper end face of the base (1), a vibration sensor two (102) is fixed on one end face of the base (1), and a vibration sensor three (103) is fixed on one side of the base (1). Each of the clamping plates (2) has a screw (201) threaded through at both ends. The tail end of the screw (201) is rotatably connected to a clamping block (2011) facing the longitudinal center line of the base (1). An electro-hydraulic servo valve is placed on the base (1) between the two clamping plates (2).

2. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 1, characterized in that: The vibration sensor one (101) is located at the upper corner of the base (1) above the vibration sensor two (102), and the vibration sensor three (103) is located on the side of the base (1) near the end edge of the vibration sensor two (102).

3. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 1, characterized in that: Right-angled blocks (203) are also fixed on the opposite surfaces of the two clamping plates (2), and the maximum width of the electro-hydraulic servo valve is equal to the distance between the two right-angled blocks (203).

4. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 1, characterized in that: Each of the clamps (2) also has two through holes (204) that are opened through it, and the through holes (204) correspond to the port positions on the electro-hydraulic servo valve.

5. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 4, characterized in that: A screw (202) is screwed through the clamp (2) between the two through holes (204), and the tail end of the screw (202) faces the longitudinal center line of the base (1) and abuts against the side of the electro-hydraulic servo valve.

6. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 3, characterized in that: Four fixing screws (104) arranged in a square shape are screwed on the base (1). The tail end of the fixing screw (104) passes through the ear plate on the electro-hydraulic servo valve and is screwed into the base (1). The distance between two fixing screws (104) on the same horizontal line is less than the distance between two right-angle blocks (203). The distance between two fixing screws (104) on the same vertical line is less than the distance between two clamping blocks (2011) on the same clamping plate (2).

7. The vibration signal testing fixture for an electro-hydraulic servo valve according to claim 1, characterized in that: The side of the clamp (2011) away from the clamp (2) abuts against the side of the electro-hydraulic servo valve.

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