Hydraulic oil cylinder piston sealing experiment table

Abstract

The utility model discloses a hydraulic oil cylinder piston sealing experiment table, which is characterized by comprising a driving device, a test board, a hydraulic system and a data acquisition system, the test bench is provided with a test station for fixing a hydraulic oil cylinder to be tested; the driving device is located on the side edge of the testing station and comprises a sliding plate and a ball screw assembly driving the sliding plate to reciprocate in the telescopic direction of the hydraulic oil cylinder to be tested, and the sliding plate is provided with a connecting base for being connected with a piston rod of the hydraulic oil cylinder to be tested. The hydraulic system is communicated with an oil inlet and an oil outlet of the hydraulic oil cylinder to be tested through oil pipes; and the data acquisition system is connected with the hydraulic oil cylinder to be tested on the test station so as to acquire hydraulic information and oil leakage information. The device can efficiently and accurately measure the sealing performance of the hydraulic oil cylinder piston.

Description

Technical Field

[0001] The utility model relates to the field of seal testing, in particular to a piston seal test bench for a hydraulic cylinder. Background Art

[0002] As an important actuator in a hydraulic system, the sealing performance of a hydraulic cylinder directly affects the stability and efficiency of the hydraulic system. In industrial fields such as wind farms, the piston seal problem of hydraulic cylinders is particularly prominent, with large internal leakage, seal ring damage resulting in weak output of the cylinder and high energy consumption. Frequent failures of the piston seals of hydraulic cylinders seriously affect the reliability of equipment and operating costs. Therefore, the sealing performance test of the piston of a hydraulic cylinder is extremely important.

[0003] Although there are performance test benches for hydraulic cylinders in the existing market, there is no test bench specifically for comprehensively and efficiently detecting the piston seal performance. Therefore, it is of great significance to develop an efficient and accurate piston seal test bench for hydraulic cylinders. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a piston seal test bench for a hydraulic cylinder, which can efficiently and accurately simulate the actual application conditions to measure the sealing durability of the piston of the hydraulic cylinder.

[0005] To achieve the above object, the utility model provides the following technical solutions:

[0006] A piston seal test bench for a hydraulic cylinder, characterized in that it includes a driving device, a test bench, a hydraulic system and a data acquisition system;

[0007] The test bench has a test station for fixing the hydraulic cylinder to be tested;

[0008] The driving device is located on the side of the test station and includes a slide plate and a ball screw assembly for driving the slide plate to reciprocate along the telescopic direction of the hydraulic cylinder to be tested. A connecting seat for connecting the piston rod of the hydraulic cylinder to be tested is arranged on the slide plate;

[0009] The hydraulic system is connected to the oil inlet and outlet of the hydraulic cylinder to be tested through oil pipes;

[0010] The data acquisition system is connected to the hydraulic cylinder to be tested at the test station to collect hydraulic information and oil leakage information.

[0011] Preferably, the connecting seat is connected to the piston rod of the hydraulic cylinder to be tested through a tension sensor.

[0012] Preferably, the hydraulic system includes an oil tank, a hydraulic pump, a hydraulic valve group, a heat exchanger and a radiator;

[0013] The fuel tank, hydraulic pump, hydraulic valve block, and heat exchanger form an oil supply circuit;

[0014] The fuel tank, hydraulic valve block, and radiator form an oil return circuit.

[0015] Preferably, the data acquisition system includes a pressure gauge and a hydraulic oil collection pipe connected to the control system of the test bench;

[0016] The pressure gauge is arranged on the hydraulic cylinder to be tested, and the sensing head of the pressure gauge can contact the hydraulic oil in the oil chamber of the hydraulic cylinder to be tested;

[0017] The hydraulic oil collection pipe is connected to the oil drain port of the hydraulic cylinder to be tested.

[0018] Preferably, the test station on the test bench has bolt holes for fixing the hydraulic cylinder to be tested.

[0019] The advantages of the present utility model are as follows: By simulating the actual working conditions, a comprehensive and accurate test is carried out on the sealing performance of the piston of the hydraulic cylinder to be tested, so as to ensure that the performance of the hydraulic cylinder meets the design requirements and improve the reliability and service life of the equipment. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the hydraulic cylinder piston seal test bench provided by this embodiment;

[0021] Figure 2 It is another schematic diagram of the hydraulic cylinder piston seal test bench provided by this embodiment;

[0022] Figure 3 It is a cross-sectional view of the hydraulic cylinder to be tested provided by this embodiment. Detailed Embodiment

[0023] Combined with Figures 1 to 3 A further description is made of the hydraulic cylinder piston seal test bench of the present utility model.

[0024] A hydraulic cylinder piston seal test bench, characterized in that it includes a control system, a driving device 4, a test bench 1, a hydraulic system 5, and a data acquisition system.

[0025] The test bench 1 is a plate structure and is installed on the frame 2 in the cabinet. There is a test station on the test bench 1 for fixing the hydraulic cylinder 3 to be tested. The driving device 4 is arranged on the test bench 1 and is located on the side of the test station. It includes a slide plate 41 and a ball screw assembly 42 that drives the slide plate 41 to reciprocate along the telescopic direction of the hydraulic cylinder 3 to be tested. A connecting seat 43 for connecting the piston rod of the hydraulic cylinder 3 to be tested is arranged on the slide plate 41, so that the ball screw assembly 42 drives the piston rod of the hydraulic cylinder 3 to be tested to reciprocate. The hydraulic system 5 is connected to the oil inlet 32 and the oil outlet of the hydraulic cylinder 3 to be tested through oil pipes, and applies pressure to the hydraulic cylinder 3 to be tested through the hydraulic system 5 to simulate the load condition of the hydraulic cylinder 3 to be tested under actual working conditions. The data acquisition system is connected to the hydraulic cylinder 3 to be tested at the test station to collect hydraulic information and oil leakage information. The control system is connected to the driving device 4, the hydraulic system 5 and the data acquisition system, and is used to control the operation of the driving device 4 and the hydraulic system 5 and analyze the information obtained by the data acquisition system to evaluate the sealing performance of the hydraulic cylinder 3 to be tested. The control system has a calculator and a controller. The calculator can receive various feedback data and analyze the data to evaluate the sealing performance. The controller is connected to each electrical appliance to control the operation of each electrical appliance.

[0026] A plurality of bolt holes are formed on the left tabletop of the test bench 1, and the plurality of bolt holes form a test station for fixing the hydraulic cylinder 3 to be tested at the left position of the test bench 1. A base 31 is connected to the hydraulic cylinder 3 to be tested, and a through hole capable of docking with the bolt hole is provided on the base 31 to realize the positioning of the hydraulic cylinder 3 to be tested.

[0027] A bottom plate is arranged at the position on the right side of the test station of the test bench 1. A slide rail extending left and right is arranged on the bottom plate. The slide plate 41 is fitted on the slide rail through a slider assembly. The ball screw assembly 42 is arranged between the slide plate 41 and the bottom plate to drive the slide plate 41 to reciprocate. The motor in the ball screw assembly 42 is a servo motor, and the servo motor is connected to the control system, so that the control system controls the rotation speed of the servo motor to make the piston rod of the hydraulic cylinder to be tested move at the required speed.

[0028] The connecting seat 43 connected to the slide plate 41 is provided with a connecting groove on the side facing the test station. A connecting pin is inserted into the connecting groove. A spherical bearing is connected to the connecting pin, and a tension sensor 7 is connected to the end of the spherical bearing. The other end of the tension sensor 7 is for connecting the piston cylinder of the hydraulic cylinder 3 to be tested. The tension sensor 7 is connected to the control system and transmits the tension signal to the control system for the control system to perform data analysis to analyze whether the tension is normal.

[0029] The hydraulic system 5 includes an oil tank 51, a hydraulic pump 55, a hydraulic valve group 54, a heat exchanger 52 and a radiator 53.

[0030] The fuel tank 51, hydraulic pump 55, hydraulic valve block 54 and heat exchanger 52 are connected by oil pipes. The hydraulic valve block 54 is connected to the two oil inlets 32 of the hydraulic cylinder 3 to be tested through oil pipes, forming an oil supply circuit for supplying oil to the hydraulic cylinder. The control system is connected to the hydraulic pump 55, hydraulic valve block 54 and heat exchanger 52 to control the opening and closing of the hydraulic pump 55, the opening and closing and opening degree of the hydraulic valve block 54, and the temperature of the heat exchanger 52. The heat exchanger 52 can increase the temperature of the hydraulic oil and supply hydraulic oil at the oil temperature under the working conditions to the hydraulic cylinder 3 to be tested.

[0031] The fuel tank 51, hydraulic valve block 54 and radiator 53 are connected by oil pipes. The hydraulic valve block 54 is connected to the two oil outlets of the hydraulic cylinder 3 to be tested through oil pipes, forming an oil return circuit. The radiator 53 can cool the hydraulic oil at the oil temperature under the working conditions, so that the hydraulic oil returns to the fuel tank 51 at normal temperature.

[0032] The data acquisition system includes a pressure gauge 6 and a hydraulic oil collection pipe connected to the control system. The pressure gauge 6 is arranged on the mounting hole of the cylinder block of the hydraulic cylinder 3 to be tested, and the sensing head of the pressure gauge 6 can contact the hydraulic oil in the oil chamber 34 of the hydraulic cylinder to detect the pressure of the hydraulic oil in the hydraulic cylinder 3 to be tested; the hydraulic oil collection pipe is connected to the oil drain port 33 of the hydraulic cylinder 3 to be tested to detect whether there is a problem of hydraulic oil leakage in the hydraulic cylinder 3 to be tested.

[0033] During the test, the hydraulic cylinder 3 to be tested is fixed on the test station 1 of the test bench, and the piston rod of the hydraulic cylinder 3 to be tested is driven to move reciprocally through the ball screw assembly 42; the control system adjusts the opening degree of the hydraulic valve in the hydraulic valve block according to the test requirements, controls the pressure and flow rate in the hydraulic system 5, supplies oil to the hydraulic cylinder 3 to be tested to apply pressure, and simulates the load condition under the actual working conditions; the data acquisition system and various test instruments monitor and record relevant data in real time, and feedback the data to the calculator in the control system. The calculator analyzes the data to evaluate the sealing performance of the hydraulic cylinder piston, so as to detect the sealing performance of the hydraulic cylinder 3 to be tested.

[0034] Unless otherwise specified, in this utility model, if there are terms such as "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the orientation or positional relationship in this utility model are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to specific circumstances.

[0035] Unless otherwise clearly specified and defined, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] The above are only the preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the idea of this utility model belong to the protection scope of this utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of this utility model should also be regarded as within the protection scope of this utility model.

Claims

1. A hydraulic cylinder piston sealing test bench, characterized in that: It includes a driving device, a test bench, a hydraulic system and a data acquisition system; The test bench has a test station for fixing the hydraulic cylinder to be tested; The driving device is located on the side of the test station and includes a slide plate and a ball screw assembly that drives the slide plate to reciprocate along the telescopic direction of the hydraulic cylinder to be tested. A connecting seat for connecting the piston rod of the hydraulic cylinder to be tested is provided on the slide plate; The hydraulic system is connected to the oil inlet and outlet of the hydraulic cylinder to be tested through oil pipes; The data acquisition system is connected to the hydraulic cylinder to be tested on the test station to collect hydraulic information and oil leakage information.

2. The hydraulic cylinder piston seal test bench according to claim 1, characterized in that: The connecting seat is connected to the piston rod of the hydraulic cylinder to be tested through a tension sensor.

3. The hydraulic cylinder piston seal test bench according to claim 1, characterized in that: The hydraulic system includes an oil tank, a hydraulic pump, a hydraulic valve group, a heat exchanger and a radiator; The oil tank, the hydraulic pump, the hydraulic valve group and the heat exchanger form an oil supply circuit; The oil tank, the hydraulic valve group and the radiator form an oil return circuit.

4. The hydraulic cylinder piston seal test bench according to claim 1, characterized in that: The data acquisition system includes a pressure gauge and a hydraulic oil collection pipe connected to the control system of the test bench; The pressure gauge is arranged on the hydraulic cylinder to be tested, and the sensing head of the pressure gauge can contact the hydraulic oil in the oil cavity of the hydraulic cylinder to be tested; The hydraulic oil collection pipe is connected to the oil drain port of the hydraulic cylinder to be tested.

5. The hydraulic cylinder piston sealing test bench according to claim 1, characterized in that: The test station on the test bench has bolt holes for fixing the hydraulic cylinder to be tested.

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