Performance detection equipment for hydraulic oil cylinder

Abstract

The performance detection equipment comprises a fixed plate, an oil cylinder bottom plate, an oil cylinder body, a movable frame, a heat pipe and an evaporator, a temperature sensor is arranged on one side of the oil cylinder body, an air inlet groove is formed in the bottom side of the fixed plate and communicates with a limiting groove, and the position, located on the outer side of the air inlet groove, of the fixed plate is fixedly connected with an air guide frame; the air conditioner has the beneficial effects that a heat pipe is arranged in the air guide frame to make contact with air flow guided in by the air guide fan to form a heat flow channel, and operation of the evaporator is matched with the air guide fan to form a cold flow channel; the lower baffle is used for providing backflow, the time that the airflow makes contact with the oil tank is prolonged, the heat of the oil body can be increased, and then the heat of the oil body is fed back to the oil cylinder body and the temperature sensor for monitoring; therefore, the influence of the temperature on the detection result when the oil cylinder detects the reciprocating positioning precision is achieved.

Description

Technical Field

[0001] The invention relates to the field of magnetic bearing detection and production, in particular to performance detection equipment for hydraulic cylinders. Background Art

[0002] A hydraulic cylinder is a hydraulic device that converts hydraulic energy into mechanical energy. It uses the pressure of hydraulic oil to drive the piston to perform linear reciprocating motion. Usually, a hydraulic cylinder is composed of basic components such as a cylinder barrel, a cylinder head, a piston, a piston rod, a sealing device, a buffer device, and an exhaust device. These structures are assembled and processed to enable the hydraulic cylinder to achieve high-precision motion control. Hydraulic cylinders need to be inspected after production and processing. By testing various parameters of the hydraulic cylinder, the actual use effect of the hydraulic cylinder can be ensured.

[0003] During the inspection process, the reciprocating positioning accuracy of the hydraulic cylinder is usually tested. That is, by applying alternating pressure to the cylinder and performing multiple cycle tests, the load conditions in actual work can be simulated. However, in the actual use of the hydraulic cylinder, high temperature will cause thermal expansion of the hydraulic cylinder, and low temperature will cause the efficiency of the hydraulic system to decrease. The ambient temperature will affect the accuracy of the hydraulic cylinder inspection.

[0004] Therefore, a performance testing device for a hydraulic cylinder is proposed to solve the problem that the temperature affects the testing accuracy when testing the reciprocating positioning accuracy of the hydraulic cylinder. Summary of the invention

[0005] The purpose of the present invention is to provide a performance testing device for a hydraulic cylinder. First, the clamping plate is driven and moved close to the cylinder bottom plate by rotating the bidirectional screw, and connected with the spring pressure rod. Then, a cycle test is performed by applying alternating pressure to the cylinder, and the temperature is changed by changing the hot and cold airflow guided by the fan, thereby increasing the parameters obtained by the cycle test, improving the detection accuracy, optimizing the performance of the hydraulic oil, and solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a performance testing device for a hydraulic cylinder, comprising a fixed plate, a cylinder bottom plate, a cylinder body, a movable frame, a heat pipe and an evaporator, wherein the heat pipe is located at the bottom side of the evaporator, a limiting groove is provided on the fixed plate, the fixed plate is rotatably connected with a bidirectional screw in the limiting groove, both sides of the bidirectional screw that are away from each other are threadedly connected with an L-shaped card, a through hole is provided on the L-shaped card and a spring pressure rod is inserted in the through hole, the spring pressure rod is movably inserted into the cylinder bottom plate, and the two L-shaped card plates can be driven to move relative to each other by rotating the bidirectional screw, one side of the L-shaped card plate contacts the upper side of the cylinder bottom plate, and then the limit is provided by connecting the cylinder bottom plate with the spring pressure rod;

[0007] A temperature sensor is provided on one side of the oil cylinder body, an air intake groove is provided on the bottom side of the fixing plate, the air intake groove is communicated with the limit groove, the fixing plate is located outside the air intake groove and is fixedly connected to an air guide frame, an oil tank is fixedly connected inside the air guide frame, a dustproof net is fixedly connected to the bottom end of the air guide frame, a first motor is fixedly connected to the bottom side of the dustproof net, an induced fan is fixedly connected to the output end of the first motor, an oil pump is fixedly connected to one side of the oil tank, a connecting hose is fixedly connected to one end of the oil pump and a pipe joint is fixedly connected to one end of the connecting hose, a specific oil circuit structure is described, and the airflow supplied by the induced fan contacts the surface of the oil tank, so as to achieve a heating and cooling effect;

[0008] The air guide frame is located at one side of the air inlet groove and is fixedly connected to a driving motor, the output end of the driving motor is fixedly connected to a flap, both sides of the air guide frame are fixedly connected to movable rods, one end of the movable rod is fixedly connected to a circular frame, one side of the circular frame is fixedly connected to a second motor, the output end of the second motor is fixedly connected to a first screw, the first screw is rotatably connected to the moving frame, the first screw is threadedly connected to a support plate, the support plate is fixedly connected to the bottom side of the fixed plate, the moving frame is fixedly connected to the heat pipe, the moving frame is movably plugged into the air guide frame, and the first screw is driven to rotate by the driving motor, and then under the limit of the support plate, the circular frame and the moving frame move away from each other to avoid the pipe fittings from blocking the evaporator.

[0009] In a further embodiment, the movable frame has a split structure, and two opposite sides of the two movable frames are fixedly connected with pads, the pads are provided with yin and yang grooves, the pads are in contact with the inner wall of the air guide frame, and the pads are made of rubber material. By providing the pads, the collision damage of the two movable frames can be reduced.

[0010] In a further embodiment, an oblique baffle is fixedly connected to the upper side of the air guide frame, and the oblique baffle is located on the upper side of the oil tank. By providing a lower baffle, the contact surface between the airflow and the oil tank is increased.

[0011] In a further embodiment, a third motor is fixedly connected to one side of the air guide frame, a second screw is fixedly connected to an output end of the third motor, a moving bar is threadedly connected to the second screw, and cleaning brushes are fixedly connected to the upper and lower sides of the moving bar. By setting the second screw to drive the moving bar and the cleaning brush to move, the surface of the fuel tank can be cleaned to avoid or reduce dust adhesion.

[0012] In a further embodiment, an arc-shaped plate is fixedly connected to the upper end of the L-shaped clamping plate, the arc-shaped plate is hollow, and air holes are evenly opened on one side of the arc-shaped plate close to the cylinder body. By providing the arc-shaped plate and the air holes, the remaining energy of the airflow can be utilized.

[0013] In a further embodiment, a cavity is opened on one side of the L-shaped pallet, and an air pump is fixedly connected to the L-shaped pallet on one side of the cavity. One end of the air pump is communicated with the interior of the arc plate, and the pressure is increased by the air pump to increase the flow speed of the airflow.

[0014] In a further embodiment, a support ball is rotatably embedded in the bottom side of the L-shaped clamping plate, and the support ball contacts the bottom plate of the oil cylinder. By providing the support ball, the friction force when the L-shaped clamping plate and the bottom plate of the oil cylinder are connected is reduced.

[0015] In a further embodiment, one side of the L-shaped clamping plate is in contact with a pad, the pad is made of rubber material, and the pad is fixedly connected to the bottom plate of the oil cylinder. By arranging the pad, buffering can be provided.

[0016] In a further embodiment, depressions are evenly provided on the upper and lower sides of the oil tank, and the depressions correspond to the inclined baffle and the evaporator respectively. By providing the depressions, the surface area of ​​the oil tank is increased and the heat conduction effect is improved.

[0017] In a further embodiment, a copper strip is evenly and fixedly connected in the depression, and the copper strip is in contact with the cleaning brush. By providing the copper strip, the hot and cold energy guiding effect can be increased.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: a hot flow channel is formed by arranging a heat pipe in the air guide frame to contact the air flow introduced by the air guide fan, and a cold flow channel is formed by the operation of the evaporator in coordination with the air guide fan, so as to promote the cold and hot air flows to contact the oil tank and the copper strips and depressions on the oil tank, and then use the lower baffle to provide reflux, increase the time the air flow contacts the oil tank, which can promote the increase of the heat of the oil body, and then the heat of the oil body is fed back to the oil cylinder body, and the temperature sensor provides monitoring, so as to achieve the influence of temperature on the detection result when the oil cylinder detects the reciprocating positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional structural diagram of the present invention;

[0020] Figure 2 It is a three-dimensional structural diagram of the air guide frame of the present invention;

[0021] Figure 3 It is a three-dimensional structural diagram of the L-shaped card board of the present invention;

[0022] Figure 4 It is a three-dimensional structural diagram of the moving strip of the present invention;

[0023] Figure 5 It is an enlarged structural diagram of point A of the present invention.

[0024] In the figure: 1. fixed plate; 2. oil cylinder bottom plate; 3. oil cylinder body; 4. limiting groove; 5. bidirectional screw; 6. L-shaped card plate; 7. spring pressure rod; 8. air guide frame; 9. oil tank; 10. temperature sensor; 11. dust screen; 12. air guide fan; 13. moving frame; 14. heat pipe; 15. evaporator; 16. inclined baffle; 17. air inlet groove; 18. flap; 19. oil pump; 20. connecting hose; 21. support plate; 22. circular frame; 23. first screw; 24. pad; 25. depression; 26. copper strip; 27. cavity; 28. air pump; 29. ​​arc plate; 30. air hole; 31. pad; 32. support ball; 33. moving strip; 34. cleaning brush; 35. second screw. DETAILED DESCRIPTION

[0025] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1

[0027] When the reciprocating positioning accuracy of the hydraulic cylinder is tested, the external ambient temperature is conducted under the action of thermal radiation, which will affect the testing accuracy of the hydraulic cylinder.

[0028] See also Figure 1-5The present embodiment provides a performance testing device for a hydraulic cylinder, including a fixed plate 1, a cylinder bottom plate 2, a cylinder body 3, a moving frame 13, a heat pipe 14 and an evaporator 15 (a compressor and an expansion valve and other equipment are arranged on one side of the evaporator 15, and the refrigerant becomes high temperature and high pressure under the action of the compressor, and then becomes liquid after entering the condenser, and then the refrigerant is filtered through a drying bottle and becomes a low temperature and low pressure gaseous mixture, and then passes through the evaporator 15 to vaporize and absorb heat to achieve a refrigeration effect), and then the airflow contacts the oil tank 9 to achieve a cooling effect, and the heat pipe 14 is located on the bottom side of the evaporator 15, and the heat pipe 14 is connected to an external power supply through a wire, and the power supply is controlled to supply power to the heat pipe 14 so that the hot air in the air guide frame 8 contacts the airflow, thereby Under the action of the guide fan 12, the oil tank 9 is heated, and a driving member for driving the extension and retraction of the oil cylinder body 3 is arranged on the upper side of the fixed plate 1, and the oil cylinder body 3 can be stably pulled in cooperation with the connection structure, and a limiting groove 4 is arranged on the fixed plate 1, and the fixed plate 1 is rotatably connected with a bidirectional screw rod 5 in the limiting groove 4, and both sides of the bidirectional screw 5 away from each other are threadedly connected with an L-shaped card plate 6, and a through hole is arranged on the L-shaped card plate 6, and a spring pressure rod 7 is inserted in the through hole, and the spring pressure rod 7 is movably inserted into the oil cylinder bottom plate 2, and manual rotation of the bidirectional screw rod 5 (there are two bidirectional screw rods 5) can drive the two L-shaped card plates 6 to move relative to each other, and cause the L-shaped card plates 6 to contact and squeeze the oil cylinder bottom plate 2, and then the spring pressure rod 7 limits the through hole on the oil cylinder bottom plate 2, thereby completing the limit;

[0029] A temperature sensor 10 is provided on one side of the oil cylinder body 3. The temperature sensor 10 is fixedly connected to one of the arc plates 29. The model of the temperature sensor 10 is PT100. An air inlet groove 17 is provided on the bottom side of the fixed plate 1. The air inlet groove 17 is communicated with the limit groove 4. The air inlet fixed plate 1 is located outside the air inlet groove 17 and is fixedly connected with an air guide frame 8. By providing the air guide frame 8 and cooperating with the guide fan 12, a guide airflow can be formed on the bottom side of the air guide frame 8, which is convenient for the airflow to contact the oil tank 9, thereby causing the oil tank 9 and the hydraulic oil to heat up. The oil tank 9 is fixedly connected in the air guide frame 8. A dustproof net 11 is fixedly connected to the bottom end of the air guide frame 8. A first motor is fixedly connected to the bottom side of the dustproof net 11. The guide fan 12 is fixedly connected to the output end of the first motor. An oil pump 19 is fixedly connected to one side of the oil tank 9. A connecting hose 20 is fixedly connected to one end of the oil pump 19, and a pipe joint is fixedly connected to one end of the connecting hose 20. The pipe joint is used for connecting with the oil cylinder body 3.

[0030] The air guide frame 8 is located on one side of the air inlet groove 17 and is fixedly connected to a driving motor (the driving motor is not shown in the figure, and is only used as a component to drive the flap 18 to rotate). The output end of the driving motor is fixedly connected to the flap 18. The driving motor drives the flap 18 to flip, so that the air inlet groove 17 is in an open state. Both sides of the air guide frame 8 are fixedly connected to movable rods, one end of the movable rod is fixedly connected to a circular frame 22, one side of the circular frame 22 is fixedly connected to a second motor, and the output end of the second motor is fixedly connected to a first screw 23. The second motor drives the first screw 23 to rotate, which can cause the circular frame 22 to move. The two moving frames 13 are separated from the middle to prevent the airflow from being blocked by the heat pipe 14 and affecting the contact between the evaporator 15 and the guide airflow. The first screw 23 is rotatably connected to the moving frame 13, and a support plate 21 is threadedly connected to the first screw 23. The support plate 21 is fixedly connected to the bottom side of the fixed plate 1, the moving frame 13 is fixedly connected to the heat pipe 14, and the moving frame 13 is movably plugged into the air guide frame 8.

[0031] The moving frame 13 is a split structure, and the opposite sides of the two moving frames 13 are fixedly connected with gaskets 24, which are provided with positive and negative grooves. The gaskets 24 are in contact with the inner wall of the air guide frame 8. By providing the gaskets 24, the collision wear of the moving frames 13 is reduced.

[0032] An inclined baffle 16 is fixedly connected to the upper side of the air guide frame 8, and the inclined baffle 16 is located on the upper side of the oil tank 9. By setting the inclined baffle 16, the airflow is blocked when it flows in from the air guide frame 8 and the side of the oil tank 9 and will be guided back to the upper side of the oil tank 9, thereby improving the contact between the airflow and the oil tank 9 and speeding up the heating or cooling process.

[0033] Place the cylinder body 3 on the upper side of the fixed plate 1, then sleeve the pad 31 on the cylinder body 3 and contact the cylinder bottom plate 2, then rotate the bidirectional screw 5 to make the two L-shaped clamping plates 6 move relative to each other, and gradually squeeze the cylinder bottom plate 2, and then connect them under the action of the spring pressure rod 7, then start the fan 12, and select the operation of the evaporator 15 or the heat pipe 14 according to the actual situation, which can generate cold and hot air flows, so that when it contacts the oil tank 9, the hydraulic oil can be cooled down, and when the hydraulic oil enters the cylinder body 3 through the oil pump 19 and the connecting hose 20, the temperature will gradually assimilate, at this time, the temperature is monitored through the temperature sensor 10, and when the temperature is suitable, the driving part on the upper side of the fixed plate 1 is started to make the cylinder body 3 extend and retract, and then the reciprocating motion positioning data of the cylinder body 3 at different temperatures are observed to improve the detection accuracy.

[0034] When the hydraulic oil with a temperature not equal to 0 enters the cylinder body 3, it will cause a local temperature rise or fall, resulting in deformation or jamming of components of the cylinder body 3 to be inspected.

[0035] See also Figure 1 , 3 , 4 and 5 are further improved on the basis of Example 1.

[0036] A third motor is fixedly connected to one side of the air guide frame 8, and a second screw 35 is fixedly connected to the output end of the third motor. A moving bar 33 is threadedly connected to the second screw 35, and cleaning brushes 34 are fixedly connected to the upper and lower sides of the moving bar 33. The second screw 35 is driven by the third motor to rotate, so that the moving bar 33 and the cleaning brush 34 can be moved, thereby cleaning the upper and lower sides of the oil tank 9, and at the same time, the upper side of the evaporator 15 can be cleaned.

[0037] An arc plate 29 is fixedly connected to the upper end of the L-shaped clamping plate 6. The arc plate 29 is hollow inside. Air holes 30 are evenly opened on the side of the arc plate 29 close to the cylinder body 3. The air flow passes through the arc plate 29 and the air holes 30, so that the air flow that has heated or cooled the oil tank 9 can contact the cylinder body 3, thereby achieving a preheating effect.

[0038] A cavity 27 is opened on one side of the L-shaped pallet 6, and an air pump 28 is fixedly connected to the L-shaped pallet 6 on one side of the cavity 27. One end of the air pump 28 is connected to the interior of the arc plate 29. The air pump 28 draws airflow in the cavity 27 and can draw airflow into the arc plate 29 with a certain effect.

[0039] A support ball 32 is rotatably embedded on the bottom side of the L-shaped clamping plate 6 , and the support ball 32 contacts the oil cylinder bottom plate 2 . By providing the support ball 32 , the friction force when the L-shaped clamping plate 6 contacts the oil cylinder bottom plate 2 can be reduced.

[0040] One side of the L-shaped clamping plate 6 is in contact with a pad 31, which is made of rubber material. The pad 31 is fixedly connected to the cylinder bottom plate 2. By arranging the pad 31, collision buffering can be provided.

[0041] The rotation of the fan 12 can cause the air flow to enter the air guide frame 8 from the dustproof net 11. An air pump 28 is arranged at the L-shaped card plate 6 to extract the air flow at the cavity 27 (the air flow that has contacted the oil tank 9) into the arc plate 29, and then it is evenly sprayed out through the air holes 30 to contact the cylinder body 3, thereby achieving the effect of preheating the cylinder body 3 and avoiding local heating or cooling when the oil in the oil tank 9 contacts the cylinder body 3.

[0042] When the guide airflow contacts the oil tank 9, the collision heat adsorption effect generated is poor, resulting in an increase in the time for heating or cooling the oil body.

[0043] See also Figure 1 and 5 , further improvements are made on the basis of Example 1.

[0044] Recesses 25 are evenly formed on the upper and lower sides of the oil tank 9 , and the recesses 25 correspond to the inclined baffle 16 and the evaporator 15 , respectively. The contact surface between the oil tank 9 and the airflow is increased by providing the recesses 25 .

[0045] A copper strip 26 is evenly and fixedly connected in the recess 25 , and the copper strip 26 is in contact with the cleaning brush 34 . By providing the copper strip 26 , the contact surface between the oil tank 9 and the airflow can be further increased. At the same time, the cleaning brush 34 can clean the surface of the oil tank 9 and the surface of the copper strip 26 .

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A performance testing device for a hydraulic cylinder, comprising a fixed plate (1), a cylinder bottom plate (2), a cylinder body (3), a moving frame (13), a heat pipe (14) and an evaporator (15), wherein the heat pipe (14) is located at the bottom side of the evaporator (15), and characterized in that: The fixing plate (1) is provided with a limiting groove (4), the fixing plate (1) is rotatably connected with a bidirectional screw (5) in the limiting groove (4), both sides of the bidirectional screw (5) away from each other are threadedly connected with an L-shaped clamping plate (6), the L-shaped clamping plate (6) is provided with a through hole and a spring pressure rod (7) is inserted in the through hole, and the spring pressure rod (7) is movably inserted into the oil cylinder bottom plate (2); A temperature sensor (10) is provided on one side of the oil cylinder body (3); an air inlet groove (17) is provided on the bottom side of the fixing plate (1); the air inlet groove (17) is communicated with the limit groove (4); the fixing plate (1) is fixedly connected to an air guide frame (8) located outside the air inlet groove (17); an oil tank (9) is fixedly connected inside the air guide frame (8); a dustproof net (11) is fixedly connected to the bottom end of the air guide frame (8); a first motor is fixedly connected to the bottom side of the dustproof net (11); an air guide fan (12) is fixedly connected to the output end of the first motor; an oil pump (19) is fixedly connected to one side of the oil tank (9); a connecting hose (20) is fixedly connected to one end of the oil pump (19); and a pipe joint is fixedly connected to one end of the connecting hose (20); The air guide frame (8) is located on one side of the air inlet groove (17) and is fixedly connected to a driving motor; the output end of the driving motor is fixedly connected to a flap (18); both sides of the air guide frame (8) are fixedly connected to movable rods; one end of the movable rod is fixedly connected to a circular frame (22); one side of the circular frame (22) is fixedly connected to a second motor; the output end of the second motor is fixedly connected to a first screw rod (23); the first screw rod (23) is rotatably connected to the moving frame (13); a support plate (21) is threadedly connected to the first screw rod (23); the support plate (21) is fixedly connected to the bottom side of the fixed plate (1); the moving frame (13) is fixedly connected to the heat pipe (14); and the moving frame (13) is movably plugged into the air guide frame (8).

2. A performance testing device for a hydraulic cylinder according to claim 1, characterized in that: The movable frame (13) is of a split structure, and opposite sides of the two movable frames (13) are fixedly connected with cushion strips (24), the cushion strips (24) are provided with positive and negative grooves, and the cushion strips (24) are in contact with the inner wall of the air guide frame (8).

3. A performance testing device for a hydraulic cylinder according to claim 2, characterized in that: An inclined baffle (16) is fixedly connected to the upper side of the air guide frame (8), and the inclined baffle (16) is located on the upper side of the oil tank (9).

4. A performance testing device for a hydraulic cylinder according to claim 3, characterized in that: A third motor is fixedly connected to one side of the air guide frame (8); a second screw rod (35) is fixedly connected to an output end of the third motor; a moving bar (33) is threadedly connected to the second screw rod (35); and cleaning brushes (34) are fixedly connected to both upper and lower sides of the moving bar (33).

5. The performance testing device for a hydraulic cylinder according to claim 1, characterized in that: The upper end of the L-shaped clamping plate (6) is fixedly connected with an arc-shaped plate (29), the arc-shaped plate (29) is hollow, and air holes (30) are evenly opened on one side of the arc-shaped plate (29) close to the oil cylinder body (3).

6. A performance testing device for a hydraulic cylinder according to claim 5, characterized in that: A cavity (27) is provided on one side of the L-shaped card plate (6), and an air pump (28) is fixedly connected to the L-shaped card plate (6) on one side of the cavity (27), and one end of the air pump (28) is communicated with the interior of the arc-shaped plate (29).

7. A performance testing device for a hydraulic cylinder according to claim 6, characterized in that: A supporting ball (32) is rotatably embedded on the bottom side of the L-shaped clamping plate (6), and the supporting ball (32) is in contact with the bottom plate (2) of the oil cylinder.

8. A performance testing device for a hydraulic cylinder according to claim 7, characterized in that: One side of the L-shaped clamping plate (6) is in contact with a pad (31), the pad (31) is made of rubber material, and the pad (31) is fixedly connected to the oil cylinder bottom plate (2).

9. The performance testing device for a hydraulic cylinder according to claim 1, characterized in that: The oil tank (9) is evenly provided with depressions (25) on both upper and lower sides, and the depressions (25) correspond to the inclined baffle (16) and the evaporator (15) respectively.

10. A performance testing device for a hydraulic cylinder according to claim 9, characterized in that: A copper strip (26) is evenly and fixedly connected in the recess (25), and the copper strip (26) is in contact with the cleaning brush (34).

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