Hydraulic servo test board

Abstract

The utility model relates to the technical field of sealing tests, in particular to a hydraulic servo testboard which comprises a device body, an installation cavity is arranged in the device body, an oil supply pipeline is arranged in the installation cavity, one end of the oil supply pipeline is connected with an oil supply connecting port on the side face of the device body, and an installation frame is vertically arranged in the installation cavity. An energy accumulator is installed on the installation frame and communicates with the oil supply pipeline through a first connecting pipe, and a first valve used for controlling the first connecting pipe to be connected and disconnected is arranged on the first connecting pipe. By arranging the energy accumulator, the oil pressure of the oil supply pipeline can be reduced by storing part of hydraulic oil by means of the energy accumulator when the oil pressure of the oil supply pipeline is suddenly increased, so that damage to equipment under test or the oil supply pipeline is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic equipment testing, in particular to a hydraulic servo testing platform. Background Art

[0002] Hydraulic drive equipment, such as hydraulic columns, hydraulic steering mechanisms and other equipment, need to undergo sealing tests or running-in tests before being put into use to ensure that the devices or components can function normally when put into use.

[0003] At present, when conducting sealing tests, most test benches are used to test the sealing of hydraulic equipment. The test bench is connected to the oil outlet and oil inlet of the hydraulic equipment, and hydraulic oil is introduced into the hydraulic equipment to drive the hydraulic equipment to simulate the situation when the hydraulic equipment is in use, so as to determine whether there is a leak in the hydraulic equipment, or to run-in the hydraulic equipment.

[0004] In the prior art, test benches are generally split and integrated. The integrated type generally integrates the oil tank, hydraulic pump, etc. into the test bench. Although this can reduce the volume of the entire test bench, it is not conducive to the heat dissipation of the hydraulic pump and the oil tank. At the same time, since the hydraulic oil pipe needs to be disassembled when the test bench tests different hydraulic equipment, it is inevitable that hydraulic oil will leak during disassembly, which will cause the hydraulic oil in the oil tank to gradually decrease. The integrated oil tank generally has a limited volume, which causes the test bench to frequently add hydraulic oil during use. Although the split type can avoid frequent addition of hydraulic oil by using a large oil tank, in the prior art, the oil tank, hydraulic pump operating table, control box, etc. of the split test bench are all fixed and too scattered, which makes the layout of the wires and pipes between them very chaotic. Utility Model Content

[0005] The utility model aims to provide a hydraulic servo test bench to solve the problem in the prior art that the oil tank, hydraulic pump, operating table and the like of the test bench are too dispersed, resulting in confusion of various wires and pipes.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A hydraulic servo test bench comprises an operating table, an oil tank, a hydraulic pump and a control box, and also comprises an installation base plate, the control box, the hydraulic pump and the oil tank are sequentially installed on the installation base plate, an installation cavity is arranged in the operating table, an oil supply pipeline is arranged in the installation cavity, one end of the oil supply pipeline is connected with an oil supply connection port on the side of the operating table, the other end of the oil supply pipeline is connected with the oil outlet of the hydraulic pump, the oil inlet of the hydraulic pump is connected with the oil outlet of the oil tank through an oil inlet pipe; the hydraulic pump and the operating table are both electrically connected with the control box.

[0008] A further technical solution is that a mounting frame is vertically arranged in the mounting cavity, an accumulator is installed on the mounting frame, the accumulator is connected to the oil supply pipeline through a first connecting pipe, and a first valve for controlling the on-off of the accumulator is arranged on the first connecting pipe.

[0009] A further technical solution is that the mounting frame includes a column, a horizontal plate and a vertical plate, the lower end of the column is connected to the bottom of the mounting cavity, the horizontal plate is horizontally connected to the side of the column, the vertical plate is vertically installed on the upper side of the horizontal plate, and the horizontal plate is provided with mounting holes that pass through the upper and lower sides. The lower end of the accumulator is installed in the mounting hole, and the side of the accumulator is fitted and fixed to the vertical plate.

[0010] A further technical solution is that a servo valve and an oil return pipeline are also installed in the installation cavity, and two oil supply connection ports are set. The two oil supply connection ports are respectively connected to the two oil outlets of the servo valve, the oil supply pipeline is connected to the oil inlet end of the servo valve, and the oil return pipeline is connected to the oil return port of the servo valve.

[0011] A further technical solution is that a heat exchanger is also arranged on the mounting base plate, the end of the return oil pipeline away from the servo valve is connected to the inlet of the heat exchanger, and the outlet of the heat exchanger is connected to the oil inlet end of the oil tank through a delivery pipe.

[0012] A further technical solution is that a second valve for controlling the on-off of the oil return pipeline is provided on the oil return pipeline.

[0013] A further technical solution is that the oil supply pipeline is connected to the oil return pipeline through a second connecting pipe, and a pressure regulating valve is provided on the second connecting pipe.

[0014] A further technical solution is that the second connecting pipe is connected to the oil return pipeline through a third connecting pipe between the high-pressure regulating valve and the oil supply pipeline, and a throttle valve is provided on the third connecting pipe.

[0015] A further technical solution is that the control handles of the second valve, the pressure regulating valve and the throttle valve are all arranged on the upper side of the operating table.

[0016] A further technical solution is that an oil supply pipeline pressure gauge and an oil return pipeline pressure gauge are installed on the upper side of the operating table, the oil supply pipeline pressure gauge is connected to the oil supply pipeline, and the oil return pipeline pressure gauge is connected to the oil return pipeline.

[0017] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. By setting up a mounting base plate, the oil tank, hydraulic pump and control box can be installed centrally, which can not only meet the requirements of using a large-volume oil tank, but also standardize the installation positions of the oil tank, hydraulic pump and control box and the wire and pipe connections between them, thereby improving the neatness of the entire test bench; 2. By setting up an oil supply interface, it is convenient to connect the external hydraulic equipment to be tested, and inject hydraulic oil into the hydraulic equipment to realize a sealing test or a running-in test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is an overall schematic diagram of a hydraulic servo test bench.

[0019] Figure 2 The utility model is a top view of a hydraulic servo test bench.

[0020] Figure 3 The utility model is a schematic diagram of an overall operating table of a hydraulic servo test bench.

[0021] Figure 4 The utility model is a schematic diagram of the opening state of the front inspection port of the operating table of the hydraulic servo test table.

[0022] Figure 5 The utility model is a three-dimensional schematic diagram of the internal oil supply pipeline and the oil return pipeline of the operating table of the hydraulic servo test table.

[0023] Figure 6 The utility model is a rear view schematic diagram of the internal oil supply pipeline and the oil return pipeline of the operating table of the hydraulic servo test table.

[0024] Figure 7 This is a rear view of an operating table of a hydraulic servo test bench of the utility model.

[0025] Icons: 1-operating table, 2-installation cavity, 3-oil supply pipeline, 4-oil supply connection port, 5-mounting frame, 6-accumulator, 7-first connecting pipe, 8-first valve, 9-column, 10-horizontal plate, 11-vertical plate, 12-mounting hole, 13-connecting plate, 14-fixing bolt, 15-servo valve, 16-return oil pipeline, 17-second valve, 18-second connecting pipe, 19-pressure regulating valve, 20-third connecting pipe, 21-throttle valve, 22-oil supply pipeline pressure gauge, 23-oil return pipeline pressure gauge, 24-front inspection port, 25-front inspection door, 26-rear inspection port, 27-rear inspection door, 28-oil tank, 29-hydraulic pump, 30-control box, 31-oil inlet pipe, 32-heat exchanger, 33-mounting base plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Figures 1 to 7 Shown is an embodiment of the utility model.

[0028] Embodiment 1:

[0029] A hydraulic servo test bench comprises an operating table 1, an oil tank 28, a hydraulic pump 29 and a control box 30, and also comprises a mounting base plate 33, wherein the control box 30, the hydraulic pump 29 and the oil tank 28 are sequentially mounted on the mounting base plate 33, an mounting cavity 2 is arranged in the operating table 1, an oil supply pipeline 3 is arranged in the mounting cavity 2, one end of the oil supply pipeline 3 is connected to an oil supply connection port 4 on the side of the operating table 1, and the other end of the oil supply pipeline is connected to the oil outlet of the hydraulic pump 29, and the oil inlet of the hydraulic pump 29 is connected to the oil outlet of the oil tank 28 through an oil inlet pipe 31; the hydraulic pump 29 and the operating table 1 are both electrically connected to the control box 30.

[0030] Embodiment 2:

[0031] On the basis of Example 1, a mounting frame 5 is vertically arranged in the mounting cavity 2, and an accumulator 6 is installed on the mounting frame 5. The accumulator 6 is connected to the oil supply pipeline 3 through a first connecting pipe 7, and a first valve 8 for controlling the on-off of the accumulator 6 is arranged on the first connecting pipe 7. By arranging the accumulator 6, when the oil pressure in the oil supply pipeline 3 increases sharply, the accumulator 6 can be used to store part of the hydraulic oil to reduce the oil pressure in the oil supply pipeline 3, thereby avoiding damage to the equipment being tested or the oil supply pipeline 3. By arranging the first valve 8, the on-off of the accumulator 6 and the oil supply pipeline 3 can be controlled, so that when replacement or maintenance is required, the first valve 8 is closed, and the accumulator 6 is disassembled to avoid leakage of the hydraulic oil in the oil supply pipeline 3.

[0032] The mounting frame 5 includes a column 9, a horizontal plate 10 and a vertical plate 11. The lower end of the column 9 is connected to the bottom of the mounting cavity 2. The horizontal plate 10 is horizontally connected to the side of the column 9. The vertical plate 11 is vertically installed on the upper side of the horizontal plate 10. The horizontal plate 10 is provided with a mounting hole 12 that passes through the upper and lower sides. The lower end of the accumulator 6 is installed in the mounting hole 12, and the side of the accumulator 6 is fixed to the vertical plate 11. The column 9 can provide support for the horizontal plate 10 and the vertical plate 11. When the accumulator 6 is installed on the horizontal plate 10, the vertical plate 11 can stabilize the accumulator 6 to prevent the accumulator 6 from shaking due to impact during use. With the mounting hole 12, the lower end of the accumulator 6 can be fixed. The connection port of the accumulator 6 is placed below the horizontal plate 10 through the through hole and connected to the first connecting pipe 7 through the connector.

[0033] A connecting plate 13 is horizontally arranged at the lower side of the column 9, and a through hole is arranged on the connecting plate 13 that passes through the upper and lower sides. A threaded hole is arranged at the bottom of the installation cavity 2. When the through hole and the threaded hole are aligned, they are fixedly connected by fixing bolts 14. By setting the connecting plate 13, the lower end of the column 9 can be welded to the upper side of the connecting plate 13, and then the connecting plate 13 is fixed to the bottom of the installation cavity 2 by fixing bolts 14, so that the entire mounting frame 5 is fixed in the installation cavity 2. In this way, the installation is not only firm, but also easy to disassemble and repair.

[0034] Embodiment 3:

[0035] On the basis of the above-mentioned embodiment, a servo valve 15 and an oil return line 16 are further installed in the installation cavity 2, and two oil supply connection ports 4 are provided, and the two oil supply connection ports 4 are respectively connected to the two oil outlets of the servo valve 15, the oil supply line 3 is connected to the oil inlet end of the servo valve 15, and the oil return line 16 is connected to the oil return port of the servo valve 15. By providing the servo valve 15 and the oil return line 16, the servo valve 15 can be used to control the oil supply to the two oil supply connection ports 4 to enable the hydraulic telescopic rod to be extended and retracted, or the hydraulic steering mechanism to be turned, etc. During the operation of the hydraulic rod or the hydraulic steering mechanism, its sealing performance is judged by observing whether there is hydraulic oil leakage at the active position, and after a period of testing, it is ensured that the sealing performance is intact before being put into use.

[0036] A heat exchanger 32 is also provided on the mounting base plate 33. The end of the return oil pipeline 16 away from the servo valve 15 is connected to the inlet of the heat exchanger 32, and the outlet of the heat exchanger 32 is connected to the oil inlet end of the oil tank 28 through a delivery pipe. By providing the heat exchanger 32, the hydraulic oil can be cooled with the help of the heat exchanger 32 when passing through the heat exchanger 32, thereby preventing the hydraulic oil temperature from being too high during long-term use. By providing the heat exchanger 32 on the return oil pipeline, the hydraulic oil can be cooled before returning to the oil tank 28, thereby preventing the oil tank 28 from being in a high temperature state. The heat exchanger 32 can adopt a plate-fin heat exchanger 32, which can dissipate heat from the hydraulic oil by means of the hydraulic oil entering the internal pipeline of the plate-fin heat exchanger and the cooperation of a fan, thereby reducing the oil temperature of the hydraulic oil entering the oil tank 28

[0037] The return oil pipeline 16 is provided with a second valve 17 for controlling its on and off. By providing the return oil pipeline 16 and the second valve 17, the second valve 17 needs to be opened when the entire test device is started to facilitate the hydraulic oil to return to the mailbox through the return oil pipeline 16 during the hydraulic column test. When testing the sealing performance of some equipment under pressure, it is only necessary to inject hydraulic oil unidirectionally through the oil supply pipeline 3 to perform a pressure sealing test. At this time, the return oil pipeline 16 is not needed and the second valve 17 can be closed.

[0038] The oil supply pipeline 3 is connected to the oil return pipeline 16 through the second connecting pipe 18, and a pressure regulating valve 19 is provided on the second connecting pipe 18. By providing the pressure regulating valve 19, when the pressure of the oil supply pipeline 3 is too high, the oil in the oil supply pipeline 3 is partially opened by opening the pressure regulating valve 19, so that part of the oil in the oil supply pipeline 3 directly enters the oil return pipeline 16 through the second connecting pipe 18, thereby reducing the pressure in the oil supply pipeline 3.

[0039] The second connecting pipe 18 is connected to the return oil pipeline 16 through the third connecting pipe 20 between the high-pressure regulating valve and the oil supply pipeline 3, and a throttle valve 21 is provided on the third connecting pipe 20. By providing the throttle valve 21, when the pressure of the return oil pipeline 16 is too high, part of the hydraulic oil is transported to the third connecting pipe 20 by means of the throttle valve 21, and the pressure of the return oil pipeline 16 is reduced by means of the stroke of the third connecting pipe 20, and the impact force of the return oil is reduced.

[0040] Embodiment 4:

[0041] Based on the above embodiment, the control handles of the second valve 17, the pressure regulating valve 19 and the throttle valve 21 are all arranged on the upper side of the operating table 1. Such arrangement facilitates the operator to control the second valve 17, the pressure regulating valve 19 and the throttle valve 21.

[0042] An oil supply line pressure gauge 22 and an oil return line pressure gauge 23 are installed on the upper side of the operating table 1. The oil supply line pressure gauge 22 is connected to the oil supply line 3, and the oil return line pressure gauge 23 is connected to the oil return line 16. By providing the oil supply line pressure gauge 22 and the oil return line pressure gauge 23, it is convenient for operators to monitor the pressure values ​​of the oil supply line 3 and the oil return line 16.

[0043] The front side of the operating table 1 is provided with a front inspection port 24 communicating with the installation cavity 2, and a front inspection door 25 for closing the front inspection port 24; the rear side of the operating table 1 is provided with a rear inspection port 26 communicating with the installation cavity 2, and a rear inspection door 27 for closing the rear inspection port 26. The front inspection port 24 and the rear inspection port 26 are provided to facilitate the operator to repair the oil supply pipeline 3, the oil return pipeline 16, the accumulator 6, etc.

[0044] Instructions for use: When conducting a sealing test on hydraulic equipment, use two hydraulic hoses to connect the two oil supply connection ports 4 and the two connection ports on the hydraulic rod to be tested. After the connection is completed, start the hydraulic pump 29 to pump the hydraulic oil in the oil tank 28 into the oil supply pipeline 3, and use the servo valve 15 to control which oil supply connection port 4 the hydraulic oil enters, thereby controlling the extension and retraction of the hydraulic rod. During the extension and retraction process, the other oil supply connection port 4 of the hydraulic oil will recover the hydraulic oil in the hydraulic rod and enter the servo valve 15. Use the servo valve 15 to control the hydraulic oil to enter the return oil pipeline 16 to recover the hydraulic oil into the oil tank 30. During the recovery process, it will be cooled through the heat exchanger 32.

[0045] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components and / or layout of the subject combination layout. In addition to the modifications and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A hydraulic servo test bench, comprising an operating table (1), an oil tank (28), a hydraulic pump (29) and a control box (30), characterized in that: It also includes a mounting base plate (33), the control box (30), the hydraulic pump (29) and the oil tank (28) being mounted on the mounting base plate (33) in sequence, the operating table (1) being provided with a mounting cavity (2), the mounting cavity (2) being provided with an oil supply pipeline (3), one end of the oil supply pipeline (3) being connected to an oil supply connection port (4) on the side of the operating table (1), the other end of the oil supply pipeline being connected to an oil outlet of the hydraulic pump (29), the oil inlet of the hydraulic pump (29) being connected to an oil outlet of the oil tank (28) via an oil inlet pipe (31); the hydraulic pump (29) and the operating table (1) are both electrically connected to the control box (30).

2. A hydraulic servo test bench according to claim 1, characterized in that: A mounting frame (5) is vertically arranged in the mounting cavity (2), an accumulator (6) is mounted on the mounting frame (5), the accumulator (6) is connected to the oil supply pipeline (3) via a first connecting pipe (7), and a first valve (8) for controlling the on-off of the first connecting pipe (7) is arranged on the first connecting pipe (7).

3. A hydraulic servo test bench according to claim 2, characterized in that: The mounting frame (5) comprises a column (9), a horizontal plate (10) and a vertical plate (11); the lower end of the column (9) is connected to the bottom of the mounting cavity (2); the horizontal plate (10) is horizontally connected to the side of the column (9); the vertical plate (11) is vertically mounted on the upper side of the horizontal plate (10); the horizontal plate (10) is provided with a mounting hole (12) passing through the upper and lower sides; the lower end of the accumulator (6) is mounted in the mounting hole (12); and the side of the accumulator (6) is fitted and fixed to the vertical plate (11).

4. The hydraulic servo test bench according to claim 1, characterized in that: A servo valve (15) and an oil return pipeline (16) are also installed in the installation cavity (2); the oil supply connection ports (4) are provided in two numbers; the two oil supply connection ports (4) are respectively connected to two oil outlets of the servo valve (15); the oil supply pipeline (3) is connected to the oil inlet end of the servo valve (15); and the oil return pipeline (16) is connected to the oil return port of the servo valve (15).

5. A hydraulic servo test bench according to claim 4, characterized in that: A heat exchanger (32) is also provided on the mounting base plate (33); an end of the oil return pipeline (16) away from the servo valve (15) is connected to an inlet of the heat exchanger (32); and an outlet of the heat exchanger (32) is connected to an oil inlet end of the oil tank (28) via a delivery pipe.

6. A hydraulic servo test bench according to claim 5, characterized in that: The oil return pipeline (16) is provided with a second valve (17) for controlling the on and off of the oil return pipeline (16).

7. The hydraulic servo test bench according to claim 6, characterized in that: The oil supply pipeline (3) is connected to the oil return pipeline (16) via a second connecting pipe (18), and a pressure regulating valve (19) is provided on the second connecting pipe (18).

8. The hydraulic servo test bench according to claim 7, characterized in that: The second connecting pipe (18) is connected to the oil return pipe (16) through a third connecting pipe (20) between the high-pressure regulating valve and the oil supply pipe (3), and a throttle valve (21) is provided on the third connecting pipe (20).

9. The hydraulic servo test bench according to claim 8, characterized in that: Control handles of the second valve (17), the pressure regulating valve (19) and the throttle valve (21) are all arranged on the upper side of the operating table (1).

10. The hydraulic servo test bench according to claim 5, characterized in that: An oil supply pipeline pressure gauge (22) and an oil return pipeline pressure gauge (23) are installed on the upper side of the operating table (1); the oil supply pipeline pressure gauge (22) is connected to the oil supply pipeline (3), and the oil return pipeline pressure gauge (23) is connected to the oil return pipeline (16).

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