Test bench for servo valve detection
By designing a test bench for servo valve detection, the problem of difficulty in convenient testing of servo valves in the production enterprise on site is solved, and the detection and calibration functions are realized, cost is reduced and production stability is ensured.
Patent Information
- Application Number
- CN202422117658.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-30
AI Technical Summary
It is difficult for the existing technology to conveniently detect servo valves at the production enterprise site, resulting in high testing timeliness and costs, affecting the normal operation of the production line.
A test bench for servo valve detection is designed, including a valve bench, a fuel tank, a hydraulic pump, an overflow pressure reducing valve, a pressure gauge and multiple connecting plates. The signal input and feedback of the servo valve is realized through manual giver and computer.
The test bench can easily detect and calibrate servo valves, reduce maintenance costs, save procurement funds, ensure good operation of equipment, and reduce the impact of production shutdowns.
Smart Images
Figure CN223019106U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of servo valve detection, and particularly relates to a test bench for servo valve detection. Background Art
[0002] The connecting valve plate is used to connect the servo valve, belonging to the technical field of hydraulic valve detection equipment. It is a hydraulic connecting part for detecting the servo valve and the hydraulic system on the hydraulic valve bench. After it is connected to the servo valve, the servo valve can accurately control the liquid or gas flow in the hydraulic or pneumatic system according to the input signal, so as to realize the precise control of the position or movement speed of the actuator.
[0003] With the extension of working time, the performance of high-precision control valves such as servo valves used in industrial enterprises on-site will decrease to varying degrees, such as control accuracy, response time, etc. The normal operation of the servo valve is crucial for ensuring the stability and reliability of the production system. Therefore, it is necessary to repair their own circuit boards and amplifiers. Usually, the practice is to disassemble the high-precision control valve and entrust it to a professional qualified agency for repair. However, this also requires a large amount of repair funds, increasing the repair cost. At the same time, it will also cause the temporary stop of the production line, having a certain impact on the normal production of the enterprise. Therefore, a device that is convenient for on-site testing and calibration of servo valves is needed to conduct the detection work, so as to shorten the detection time limit and cost, and at the same time reduce the impact of production shutdown. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a test bench for servo valve detection to solve the problem that it is not convenient to detect the servo valve on-site in production enterprises.
[0005] The technical solution of the utility model is: a test bench for servo valve detection, including a valve bench. A fuel tank is connected below the valve bench. A hydraulic pump is arranged in the fuel tank. An overflow pressure reducing valve and a pressure gauge are respectively arranged on the pipeline connecting the hydraulic pump and the valve bench. Three connecting plates are arranged on the upper part of the valve bench. Corresponding servo valves are respectively connected to the main body of the first connecting plate, the main body of the second connecting plate, and the main body of the third connecting plate. The number of servo valves corresponds to the number of connecting plates. A manual setter is connected to the servo valve. The manual setter and the servo valve are also connected to a computer. The main bodies of the three connecting plates are all cuboid-shaped. The upper top surface and the lower bottom surface of the main bodies of the three connecting plates are respectively an upper mounting surface and a lower mounting surface. The upper mounting surface contacts the servo valve, and the lower mounting surface contacts the valve bench.
[0006] As a further improvement of the present utility model, the first connecting plate body is respectively provided with a vertical oil inlet through hole P port, an oil return through hole T port, a working through hole A port, a mounting through hole, a control oil hole X port and a control oil drain hole Y port. The two ends of the oil inlet through hole P port are respectively connected opposite to the oil inlet of the servo valve and the valve platform. The two ends of the oil return through hole T port are respectively connected opposite to the oil return port of the servo valve and the valve platform. The two ends of the working through hole A port are respectively connected opposite to the working oil inlet of the servo valve and the valve platform. The two ends of the mounting through hole are respectively connected opposite to the mounting port of the servo valve and the valve platform. The control oil hole X port is connected opposite to the control oil port of the servo valve. The control oil drain hole Y port is connected opposite to the drain port of the servo valve.
[0007] As a further improvement of the present utility model, the second connecting plate body is respectively provided with a vertical oil inlet through hole P port, an oil return through hole T port, a working through hole A port, a mounting through hole and a control oil drain hole Y port. A second process hole is further provided. The outer ends of the second process hole are respectively located on three side walls of the second connecting plate body. The second process hole is respectively parallel to the upper mounting surface of the second connecting plate body. The two ends of the oil inlet through hole P port are respectively connected opposite to the oil inlet of the servo valve and the valve platform. The two ends of the oil return through hole T port are respectively connected opposite to the oil return port of the servo valve and the valve platform. The two ends of the working through hole A port are respectively connected opposite to the working oil inlet of the servo valve and the valve platform. The two ends of the mounting through hole are respectively connected opposite to the mounting port of the servo valve and the valve platform. The control oil drain hole Y port is connected opposite to the drain port of the servo valve.
[0008] As a further improvement of the present utility model, the third connecting plate body is respectively provided with a vertical oil inlet through hole P port, an oil return through hole T port, a working through hole A port, a control oil hole X port, a mounting through hole and a control oil drain hole Y port. A third process hole is further provided. The outer ends of the third process hole are respectively located on two side walls of the third connecting plate body. The third process hole is respectively arranged at an angle inclined to the upper mounting surface of the third connecting plate body. The two ends of the oil inlet through hole P port are respectively connected opposite to the oil inlet of the servo valve and the valve platform. The two ends of the oil return through hole T port are respectively connected opposite to the oil return port of the servo valve and the valve platform. The two ends of the working through hole A port are respectively connected opposite to the working oil inlet of the servo valve and the valve platform. The two ends of the mounting through hole are respectively connected opposite to the mounting port of the servo valve and the valve platform. The control oil hole X port is connected opposite to the control oil port of the servo valve. The control oil drain hole Y port is connected opposite to the drain port of the servo valve.
[0009] As a further improvement of the present utility model, annular sealing grooves are respectively provided on the oil inlet through hole P port, the working through hole B port, the oil return through hole T port and the working through hole A port on the first connecting plate body, the second connecting plate body and the third connecting plate body on their corresponding upper mounting surfaces.
[0010] The beneficial effects of the present utility model are as follows: The present utility model can connect different servo valves to be measured to the valve platform through their corresponding connecting plates respectively, completing the mutual exchange of the servo valves to be measured on the valve platform. Multiple connecting plates are used to connect the servo valves to test and calibrate the restored accuracy. The connecting plates are connected to the servo valves in the hydraulic system for testing and calibration. An input signal is given to the servo valve to be measured through a manual setter, and the output signal is fed back to the connected computer. By comparing with the curve preset in the computer according to flow and pressure, the input signal of the manual setter is continuously adjusted, ultimately achieving the calibration of the servo valve to be measured, so as to realize the detection of the servo valve to be measured and the simple repair of the faulty servo valve. It has the functions of detecting, flushing, and running-in of the servo valve, and can test the electronic control drive board, control accuracy, response, zero drift, etc. of the corresponding servo valve, thereby ensuring the stability and reliability of the system, reducing the maintenance cost, saving the procurement funds, and ensuring the good operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic diagram of the overall structure of the present utility model;
[0012] Figure 2 is a top view of the structure of the first connecting plate in the present utility model;
[0013] Figure 3 is Figure 2 the view in the A-A direction of
[0014] Figure 4 is Figure 2 the view in the B-B direction of
[0015] Figure 5 is a top view of the structure of the second connecting plate in the present utility model;
[0016] Figure 6 is Figure 5 the view in the A-A direction of
[0017] Figure 7 is Figure 5 the view in the B-B direction of
[0018] Figure 8 is Figure 5 the view in the C-C direction of
[0019] Figure 9 is Figure 5 the view in the D-D direction of
[0020] Figure 10 is Figure 8 the view in the E-E direction of
[0021] Figure 11 is a top view of the structure of the third connecting plate in the present utility model;
[0022] Figure 12 The A-A view of Figure 11 ;
[0023] Figure 13 The B-B view of Figure 11 ;
[0024] Figure 14 The C-C view of Figure 11 ;
[0025] Figure 15 The D-D view of Figure 11 ;
[0026] Figure 16 The E-E view of Figure 11 ;
[0027] Figure 17 The F-F view of Figure 12 ;
[0028] In the figure: 1 - fuel tank; 2 - hydraulic pump; 3 - overflow pressure reducing valve; 4 - pressure gauge; 5 - valve platform; 6 - connecting plate; 7 - servo valve; 8 - manual setter; 9 - computer; 101 - first connecting plate body; 1012 - second connecting plate body; 1013 - third connecting plate body; 102 - mounting through hole; 1032 - second process hole; 1033 - third process hole; 104 - oil inlet through hole P port; 105 - working through hole B port; 106 - oil return through hole T port; 107 - control oil drain hole Y port; 108 - working through hole A port; 109 - control oil hole X port; 1010 - upper mounting surface; 1011 - lower mounting surface. Specific embodiments
[0029] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0030] As Figures 1 - 17 shown, a test bench for servo valve detection includes a valve platform 5, a fuel tank 1 is connected below the valve platform 5, a hydraulic pump 2 is provided in the fuel tank 1, an overflow pressure reducing valve 3 and a pressure gauge 4 are respectively provided on the pipeline connecting the hydraulic pump 2 and the valve platform 5, three connecting plates are provided on the upper part of the valve platform 5, corresponding servo valves 7 are respectively connected to the first connecting plate body 101, the second connecting plate body 1012 and the third connecting plate body 1013, the number of servo valves 7 corresponds to the number of connecting plates, a manual setter 8 is connected to the servo valve 7, and a computer 9 is also connected to the manual setter 8 and the servo valve 7; the connecting plate bodies of the three connecting plates are all cuboid-shaped, the upper top surface and the lower bottom surface of the three connecting plate bodies are respectively the upper mounting surface 1010 and the lower mounting surface 1011, the upper mounting surface 1010 contacts the servo valve 7, and the lower mounting surface 1011 contacts the valve platform 5.
[0031] On the first connecting plate body 101, there are respectively provided a vertical oil inlet through hole P port 104, an oil return through hole T port 106, a working through hole A port 108, a mounting through hole 102, a control oil hole X port 109, and a control oil drain hole Y port 107. The two ends of the oil inlet through hole P port 104 are respectively connected opposite to the oil inlet of the servo valve 7 and the valve block 5. The two ends of the oil return through hole T port 106 are respectively connected opposite to the oil return port of the servo valve 7 and the valve block 5. The two ends of the working through hole A port 108 are respectively connected opposite to the working oil inlet of the servo valve 7 and the valve block 5. The two ends of the mounting through hole 102 are respectively connected opposite to the mounting port of the servo valve 7 and the valve block 5. The control oil hole X port 109 is connected opposite to the control oil port of the servo valve 7. The control oil drain hole Y port 107 is connected opposite to the drain port of the servo valve 7.
[0032] On the second connecting plate body 1012, there are respectively provided a vertical oil inlet through hole P port 104, an oil return through hole T port 106, a working through hole A port 108, a mounting through hole 102, and a control oil drain hole Y port 107. There is also a second process hole 1032. The outer ends of the second process hole 1032 are respectively located on three side walls of the second connecting plate body 1012. The second process hole 1032 is respectively parallel to the upper mounting surface 1010 of the second connecting plate body 1012. The two ends of the oil inlet through hole P port 104 are respectively connected opposite to the oil inlet of the servo valve 7 and the valve block 5. The two ends of the oil return through hole T port 106 are respectively connected opposite to the oil return port of the servo valve 7 and the valve block 5. The two ends of the working through hole A port 108 are respectively connected opposite to the working oil inlet of the servo valve 7 and the valve block 5. The two ends of the mounting through hole 102 are respectively connected opposite to the mounting port of the servo valve 7 and the valve block 5. The control oil drain hole Y port 107 is connected opposite to the drain port of the servo valve 7.
[0033] On the third connecting plate body 1013, there are respectively provided a vertical oil inlet through hole P port 104, an oil return through hole T port 106, a working through hole A port 108, a control oil hole X port 109, a mounting through hole 102, and a control oil drain hole Y port 107. There is also a third process hole 1033. The outer ends of the third process hole 1033 are respectively located on two side walls of the third connecting plate body 1013. The third process hole 1033 is respectively inclined at a certain angle with respect to the upper mounting surface 1010 of the third connecting plate body 1013. The two ends of the oil inlet through hole P port 104 are respectively connected opposite to the oil inlet of the servo valve 7 and the valve block 5. The two ends of the oil return through hole T port 106 are respectively connected opposite to the oil return port of the servo valve 7 and the valve block 5. The two ends of the working through hole A port 108 are respectively connected opposite to the working oil inlet of the servo valve 7 and the valve block 5. The two ends of the mounting through hole 102 are respectively connected opposite to the mounting port of the servo valve 7 and the valve block 5. The control oil hole X port 109 is connected opposite to the control oil port of the servo valve 7. The control oil drain hole Y port 107 is connected opposite to the drain port of the servo valve 7.
[0034] The oil inlet through-hole P port 104, working through-hole B port 105, oil return through-hole T port 106, and working through-hole A port 108 on the first connecting plate body 101, the second connecting plate body 1012, and the third connecting plate body 1013 are respectively provided with annular sealing grooves on their corresponding upper mounting surfaces 1010.
[0035] Common servo valve models usually include 4WRZ16, 4WRAE6, and D661. The first connecting plate 101 is applicable to the servo valve 7 with a nominal diameter of 16 mm and model 4WRZ16. The second connecting plate 1012 is applicable to the servo valve 7 with a nominal diameter of 6 mm and model 4WRAE6. The third connecting plate 1013 is applicable to the servo valve 7 with a nominal diameter of 10 mm and model D661. The first connecting plate body 101, the second connecting plate body 1012, and the third connecting plate body 1013 are respectively installed on the valve stand 5 together with the corresponding model servo valves 7 to respectively test the precise position, response time, and control of the moving speed of the corresponding servo valve 7 to be measured, and to test the zero drift of the servo valve.
[0036] The process hole is a channel connecting each processed hole and can be used to connect the pressure gauge 4 to measure the pressure value. Since the upper and lower parts of the first connecting plate body 101 are straight through-holes, there is no need to set a process hole. The second process hole 1032 and the third process hole 1033 on the second connecting plate body 1012 and the third connecting plate body 1013 are both installed with an oil plug or a pressure gauge 4 on the side wall. Since the servo valve 7 with a nominal diameter of 6 mm does not have a designed connecting through-hole, there is no control oil hole X port 109 on the second connecting plate 1012.
[0037] Connect the first connecting plate body 101, the second connecting plate body 1012, and the third connecting plate body 1013 to the valve stand 5 respectively, and connect the corresponding components to the hydraulic system. Install the servo valve 7 to be measured on the corresponding connecting plate for testing and calibration. Input a signal to the servo valve 7 to be measured through the manual setter 8, and the output signal is input to the connected computer 9. By comparing with the curve preset in the computer 9 according to the flow rate and pressure, continuously adjust the input signal of the manual setter 8, and finally achieve the calibration of the servo valve 7 to be measured, so as to meet the use conditions of the servo valve 7 test, to test and improve the control of the precise position, response time, and moving speed, and to test the zero drift of the servo valve 7, which is crucial for ensuring the stability and reliability of the system, without the need to entrust a professional institution for maintenance, greatly reducing the maintenance cost and the equipment procurement cost, and providing a reference method for the testing and calibration of similar equipment.
Claims
1. A test bench for servo valve detection, characterized in that: The invention comprises a valve platform (5), wherein an oil tank (1) is connected to the bottom of the valve platform (5), a hydraulic pump (2) is arranged in the oil tank (1), a relief pressure reducing valve (3) and a pressure gauge (4) are respectively arranged on the pipeline connecting the hydraulic pump (2) and the valve platform (5), and three connecting plates are arranged on the top of the valve platform (5), wherein a first connecting plate body (101), a second connecting plate body (1012) and a third connecting plate body (1013) are respectively connected to corresponding servo valves (7), the number of servo valves (7) and the number of connecting plates correspond, the servo valves (7) are connected to manual setters (8), and the manual setters (8) and the servo valves (7) are also connected to a computer (9); the connecting plate bodies of the three connecting plates are all in the shape of a rectangular parallelepiped, the upper top surfaces and lower bottom surfaces of the three connecting plate bodies are respectively an upper mounting surface (1010) and a lower mounting surface (1011), the upper mounting surface (1010) is in contact with the servo valve (7), and the lower mounting surface (1011) is in contact with the valve platform (5).
2. A test bench for servo valve detection according to claim 1, characterized in that: The first connecting plate body (101) is provided with a vertical oil inlet through hole P (104), an oil return through hole T (106), a working through hole A (108), a mounting through hole (102), a control oil hole X (109) and a control oil unloading hole Y (107). The two ends of the oil inlet through hole P (104) are respectively connected to the oil inlet of the servo valve (7) and the valve table (5). The two ends of the oil return through hole T (106) are respectively connected to the servo valve (7) and the valve table (5). The valve (7) and the oil return port of the valve table (5) are connected relative to each other, the two ends of the working through hole A port (108) are connected relative to the working oil inlet ports of the servo valve (7) and the valve table (5), the two ends of the mounting through hole (102) are connected relative to each other with the mounting ports of the servo valve (7) and the valve table (5), the control oil hole X port (109) is connected relative to the control oil port of the servo valve (7), and the control oil unloading hole Y port (107) is connected relative to the unloading port of the servo valve (7).
3. A test bench for servo valve detection according to claim 1, characterized in that: The second connecting plate body (1012) is respectively provided with a vertical oil inlet through hole P (104), an oil return through hole T (106), a working through hole A (108), a mounting through hole (102) and a control oil unloading hole Y (107), and is also provided with a second process hole (1032). The outer ends of the second process holes (1032) are respectively located on the three side walls of the second connecting plate body (1012). The second process holes (1032) are respectively parallel to the upper mounting surface (1010) of the second connecting plate body (1012). The two ends of the through hole P (104) are respectively connected to the oil inlet of the servo valve (7) and the valve table (5); the two ends of the oil return through hole T (106) are respectively connected to the oil return of the servo valve (7) and the valve table (5); the two ends of the working through hole A (108) are respectively connected to the working oil inlet of the servo valve (7) and the valve table (5); the two ends of the mounting through hole (102) are respectively connected to the mounting port of the servo valve (7) and the valve table (5); and the control oil unloading hole Y (107) is respectively connected to the oil unloading port of the servo valve (7).
4. A test bench for servo valve detection according to claim 1, characterized in that: The third connecting plate body (1013) is respectively provided with a vertical oil inlet through hole P (104), an oil return through hole T (106), a working through hole A (108), an oil control hole X (109), a mounting through hole (102) and an oil control unloading hole Y (107), and is also provided with a third process hole (1033). The outer ends of the third process holes (1033) are respectively located on the two side walls of the third connecting plate body (1013). The third process holes (1033) are respectively arranged at a certain angle to the upper mounting surface (1010) of the third connecting plate body (1013). The oil inlet through hole P ( The two ends of the oil return through hole T (106) are respectively connected to the oil return ports of the servo valve (7) and the valve table (5); the two ends of the working through hole A (108) are respectively connected to the working oil inlet ports of the servo valve (7) and the valve table (5); the two ends of the mounting through hole (102) are respectively connected to the mounting ports of the servo valve (7) and the valve table (5); the control oil hole X (109) is respectively connected to the control oil port of the servo valve (7); and the control oil unloading hole Y (107) is respectively connected to the unloading port of the servo valve (7).
5. A test bench for servo valve detection according to any one of claims 2 to 4, characterized in that: The oil inlet through hole P (104), the working through hole B (105), the oil return through hole T (106) and the working through hole A (108) on the first connecting plate body (101), the second connecting plate body (1012) and the third connecting plate body (1013) are respectively provided with annular sealing grooves on their corresponding upper mounting surfaces (1010).