CN115899022B - Internally curved motor stator guide rail-plunger assembly impact load testing device - Google Patents

Abstract

The invention relates to the field of inner-curve hydraulic motor testing, and specifically relates to an inner-curve motor stator guide-plunger assembly impact load testing device, which mainly includes a control display terminal, a test system, an oil circuit, and a high-pressure oil source. The test system and the oil source The circuits are installed on the test platform. The control display terminal is electrically connected to the test system, controls the operation of the test system and receives the data transmitted by the test system. The high-pressure oil source provides high-pressure oil to the test system through the oil circuit. The test platform is also installed There is an inner curve guide rail test piece and a driving linear motor. The inner curve guide rail test piece is installed at the lower end of the test system and is connected to the driving linear motor. The present invention solves the problem that the existing test relies on the whole machine test bench, has complicated control, and has high usage and maintenance costs. , problems such as insufficient testing accuracy.

Description

An impact load testing device for inner curve motor stator guide rail-plunger assembly

Technical field

The invention relates to the field of internal curve hydraulic motor testing, and in particular to an internal curve motor stator guide rail-plunger assembly impact load testing device.

Background technique

In recent years, with the development of China's equipment manufacturing industry, the demand for low-speed and high-torque internal curve hydraulic motors in large engineering machinery, shield machines, and ocean exploration equipment has increased year by year. At the same time, the motors are required to have lower stable speeds and lower Vibration intensity and radiation noise level, so the structural design of the internal curve hydraulic motor needs to master its structural dynamic characteristics. The linear size characteristics of the stator guide rail curve of the inner curve motor have an important influence on the impact load caused by the hydraulic motor on the plunger assembly during the working process. In order to reduce the impact of the structural characteristics of the stator guide rail of the inner curve motor on the impact load caused by the structure, the In the curve design, the impact load caused by the stator guide rail of the inner curve motor on the plunger assembly is controlled to improve the vibration and noise characteristics of the overall structure of the inner curve hydraulic motor and the stability of the torque load output of the whole machine, and further improve its working reliability. An important method to complete the forward design of the inner curve hydraulic motor.

At present, the domestic method for testing the impact load of the stator guide rail of the inner curve motor mainly relies on the universal hydraulic motor test bench to replace and install the fully processed stator guide rail structure of the inner curve motor into the inner curve hydraulic motor structure. Under given test conditions, Test the torque ripple of the output shaft of the inner curve motor and the vibration acceleration value of the motor surface to measure the impact load characteristics caused by the working of the inner curve motor stator guide structure of the inner curve hydraulic motor, and evaluate the load of the inner curve motor stator guide rail on the plunger assembly. impact. This method relies heavily on test equipment. At the same time, because the overall test equipment is relatively complex, the installation, debugging, and post-maintenance labor costs and energy consumption required for the test are high. The entire test process is not easy to replace and replace the stator guide rail of the inner curve motor. The structural deformation test, test accuracy and test data matching during its working process are not accurate enough.

Contents of the invention

The present invention provides an internal curve motor stator guide rail-plunger assembly impact load testing device to solve the problems mentioned in the background art that existing tests rely on a complete machine test bench, have complex controls, high usage and maintenance costs, and insufficient test accuracy.

The invention provides an internal curve motor stator guide rail-plunger assembly impact load testing device, which mainly includes a control display terminal, a test system, an oil circuit, and a high-pressure oil source. The test system and the oil circuit are both installed on the test platform. The control display terminal is electrically connected to the test system, controls the work of the test system and receives data transmitted by the test system. The high-pressure oil source provides high-pressure oil to the test system through the oil circuit. The test platform is also equipped with an inner curve guide rail specimen and a driver. The linear motor and the inner curve guide rail specimen are installed at the lower end of the test system and are connected to the drive linear motor; the test system mainly includes a plunger assembly, a plunger drive device, a one-way valve, a solenoid valve, a reciprocating cylinder and a displacement acceleration sensor. , the reciprocating oil cylinder includes a cylinder barrel and a reciprocating piston. The reciprocating piston divides the inside of the cylinder barrel into two spaces. The two ends of the reciprocating piston are respectively fixedly connected with a piston connecting rod and a mover push rod. The plunger drives The device is fixedly connected between the reciprocating oil cylinder and the plunger assembly, and is threadedly connected to the piston connecting rod. One end of the mover push rod away from the reciprocating piston extends into the displacement acceleration sensor, and the displacement acceleration sensor is connected to the control display terminal. , the cylinder wall at the end of the cylinder away from the piston connecting rod is also provided with a reciprocating oil cylinder port A, a reciprocating oil cylinder port B and a reciprocating oil cylinder one-way valve interface. The reciprocating oil cylinder communicates with the one-way valve oil line through the reciprocating oil cylinder one-way valve interface. In addition, it is connected to the solenoid valve oil circuit through port A of the reciprocating oil cylinder and port B of the reciprocating oil cylinder. The one-way valve and the solenoid valve are all connected to the oil circuit.

Further, the plunger assembly includes a roller, a roller bearing bush, a plunger and a plunger guide rail. The roller is assembled in the roller bearing bush, and the roller bearing bush is arranged in the lower end surface of the plunger. The plug is slidingly connected to the plunger guide rail.

Further, the plunger driving device includes a force sensor, a piston connector and a plunger cylinder. The plunger guide rail is fixedly arranged on the inner wall of the plunger cylinder. The force sensor is arranged in the plunger cylinder. The force sensor Force sensor screws are provided on both sides, one end of the force sensor screw is threadedly connected to an end surface of the plunger away from the roller bearing bush, and the other end is threadedly connected to the piston connector.

Further, the reciprocating oil cylinder also includes a connecting end cover and an end cover. The connecting end cover is arranged between the plunger driving device and the reciprocating oil cylinder, and is fixedly connected to the plunger cylinder through bolts. At the same time, the connecting end cover is also connected through a tight The fixing screw is fixedly connected to the cylinder barrel. The end cover is arranged between the reciprocating oil cylinder and the displacement acceleration sensor, and is fixedly connected to the cylinder barrel through the end cover screw. The end cover is also provided with a through hole, and the mover pushes The rod extends through the through hole.

Further, the displacement acceleration sensor includes a sensor housing, an electromagnetic coil and a sensor interface. The sensor housing is fixedly connected to the end cover through sensor fastening screws. The electromagnetic coil is placed in the sensor housing and surrounded by a The circumferential direction of the mover push rod in the displacement acceleration sensor, the sensor interface is arranged at the end of the sensor housing and is connected with the control display terminal.

Further, the one-way valve is provided with a one-way valve inlet and a one-way valve outlet. The one-way valve inlet is connected to the reciprocating oil cylinder one-way valve interface, and the one-way valve outlet is connected to the external oil circuit. , the one-way valve is provided with a one-way valve magnetic core and a one-way valve spool. The one-way valve magnetic core and the one-way valve spool are fixedly connected through a valve core connecting rod thread. At the same time, the one-way valve valve A return spring is provided between the core and the valve end of the one-way valve. A one-way valve electromagnetic coil is provided circumferentially on the magnetic core of the one-way valve. A one-way valve control interface is also provided on the end face of the one-way valve. The valve control interface is connected with the control display terminal.

Further, the solenoid valve includes a solenoid valve body, a valve core and a mover. The valve core is arranged inside the solenoid valve body, and its two ends are respectively provided with a valve core spring I and a valve core spring II. The valve core One end is connected to the mover. The mover is circumferentially provided with a solenoid valve coil. The solenoid valve is also provided with A port, B port, P port and T port. The A port and B port respectively correspond to the reciprocating The A port of the oil cylinder is connected to the B port of the reciprocating oil cylinder, and the P port and T port are both connected to the external oil circuit. The end of the solenoid valve is also fixedly connected to the valve body end cover through the valve body end cover screws. The solenoid valve is also provided with a solenoid valve control interface, and the solenoid valve control interface is connected with the control display terminal.

Further, a sealing gasket is provided between the connecting end cover and the plunger cylinder, a sealing ring is provided at the contact point between the piston connecting rod and the connecting end cover, and the mover push rod is in contact with the reciprocating cylinder end cover. The contact part is provided with an end cover sealing ring.

Furthermore, a height adjustment motor is installed at the bottom of the test platform.

Compared with the existing technology, the technical solution provided by the present invention has the following beneficial effects:

1. Small size, compact structure and low cost

The test device provided by the present invention eliminates the need for other complex internal curve hydraulic motor structures and distribution substructures, greatly reducing the volume of the overall test device; the test process uses a solenoid valve to control the loading of the reciprocating oil cylinder to apply back pressure to the plunger assembly and drive The linear motor drives the inner curve guide rail specimen to move, greatly reducing test energy consumption and workload.

2. The movement speed of the inner curve guide rail specimen is variable, and the loading pressure of the plunger assembly is adjustable.

By controlling the motion speed of the linear motor to drive the movement displacement and speed of the inner curve guide rail specimen, the different speed operating conditions of the inner curve hydraulic motor are simulated; through the control of each inlet and outlet of the solenoid valve and one-way valve, The amount of hydraulic oil that enters the reciprocating cylinder to form the back pressure of the plunger assembly can be controlled, thereby controlling the loading pressure of the plunger assembly.

3. The test system is controlled in real time and the test device is safe and reliable.

The test device provided by the present invention displays the test data of acceleration displacement sensor, force sensor, etc. on the control display terminal in real time, and systematically reflects the dynamic test effect by testing the motion parameter information of the plunger assembly and combining it with the motion parameters of the inner curve guide rail specimen. ; The test device is also equipped with a limited value alarm message reminder to ensure the safety and reliability of the experimental device during the test process.

4. The modular structure of the test device can be combined in any way, and the inner curve guide rail specimen test has good versatility.

According to the structural parameters such as the number of plungers of the inner curve hydraulic motor developed and designed, the inner curve guide rail specimen can be changed to test the impact load test of the stator guide rail and plunger assembly of different types of inner curve motors. The inner curve motor can also be completed according to the research content. Experimental tests on the structural stress of the stator guide rail and the wear and fatigue life of key friction pairs.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of an impact load testing device for an inner curve motor stator guide rail-plunger assembly provided by the present invention;

Figure 2 is a cross-sectional view of the test system structure.

In the picture: 1-Inner curve guide rail specimen; 2-Roller; 3-Roller bearing; 4-Plunger; 5-Plunger guide rail; 6-Force sensor screw; 7-Force sensor; 8-Piston connector; 9-Connecting thread; 10-Plunger cylinder; 11-Bolt; 12-Sealing gasket; 13-Connecting end cover; 14-Tightening screw; 15-Sealing ring; 16-Piston connecting rod; 17-Cylinder barrel; 18 -Reciprocating piston; 19-One-way valve control interface; 20-One-way valve solenoid coil; 21-One-way valve magnetic core; 22-One-way valve outlet; 23-Valve core connecting rod thread; 24-One-way valve spool ; 25-Return spring; 26-One-way valve inlet; 27-Reciprocating cylinder one-way valve interface; 28-End cover; 29-End cover screw; 30-Electromagnetic coil; 31-Sensor housing; 32-Motor pusher Rod; 33-sensor interface; 34-sensor fastening screw; 35-end cover sealing ring; 36-motor; 37-solenoid valve coil; 38-solenoid valve control interface; 39-spool spring I; 40-reciprocating cylinder A port; 41-A port; 42-valve core; 43-P port; 44-B port; 45-T port; 46-reciprocating cylinder B port; 47-solenoid valve body; 48-valve body end cover screws; 49 -Valve core spring II; 50-valve body end cover; 51-drive linear motor; 52-height adjustment motor; 53-oil circuit.

Detailed ways

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings.

As shown in Figure 1, an inner curve motor stator guide rail-plunger assembly impact load testing device provided by the present invention mainly includes a control display terminal, a testing system, an oil circuit 53 and a high-pressure oil source. The testing system and oil Roads 53 are all installed on the test platform. The control display terminal is electrically connected to the test system, controls the work of the test system and receives data transmitted by the test system. The high-pressure oil source provides high-pressure oil to the test system through oil road 53. The test platform has An inner curved guide rail specimen 1 and a driving linear motor 51 are also installed. The inner curved guide rail specimen 1 is installed at the lower end of the test system and is connected to the driving linear motor 51, so that the inner curved guide rail specimen 1 can drive the linear motor 51. When driven, the inner curve hydraulic motor moves at a linear speed according to the test operating speed of the inner curve hydraulic motor. A height adjustment motor 52 is also installed at the bottom of the test platform. The adjustment of the height of the test platform by the height adjustment motor 52 controls the inner curve guide rail specimen 1 and Test system contacts.

As shown in Figure 2, the test system mainly includes a plunger assembly, a plunger driving device, a one-way valve, a solenoid valve, a reciprocating cylinder and a displacement acceleration sensor. The two ends of the reciprocating cylinder are connected to a plunger driving device and a displacement acceleration sensor respectively. The displacement acceleration sensor and the plunger assembly are connected to the lower end of the plunger drive device. The one-way valve and the solenoid valve are connected to the reciprocating cylinder through the oil port respectively.

The plunger assembly includes a roller 2, a roller bearing bush 3, a plunger 4 and a plunger guide rail 5. The roller 2 is movably connected in the roller bearing bush 3. During the test, the lower end of the roller 2 contacts the inner curve guide rail. Part 1, and moves along the guide rail of the inner curve guide rail test piece 1, the roller bearing bush 3 is arranged in the lower end surface of the plunger 4, and the plunger 4 is slidingly connected to the plunger guide rail 5.

The plunger driving device includes a force sensor 7, a piston connector 8 and a plunger cylinder 10. The plunger guide rail 5 is fixedly arranged on the inner wall of the plunger cylinder 10. The force sensor 7 is arranged on the plunger cylinder 10. Inside, a force sensor screw 6 is provided through the force sensor 7. One end of the force sensor screw 6 is threadedly connected to an end surface of the plunger 4 away from the roller bearing bush 3, and the other end is threadedly connected to the piston connector 8. On the column When the plug 4 reciprocates along the plunger guide rail 5 in the plunger cylinder 10 , the impact load of the plunger assembly can be tested through the force sensor 7 .

The reciprocating oil cylinder mainly includes a connecting end cover 13, a cylinder barrel 17, a reciprocating piston 18 and an end cover 28. The connecting end cover 13 is fixedly connected to the plunger cylinder 10 through bolts 11, and the connecting end cover 13 and the plunger cylinder are connected. A sealing gasket 12 is provided between the bodies 10. At the same time, the connecting end cover 13 is also fixedly connected to the cylinder barrel 17 through a fastening screw 14. The end cover 28 is provided at the other end of the reciprocating oil cylinder and is connected to the cylinder barrel through an end cover screw 29. 17 is fixedly connected; the reciprocating piston 18 divides the inside of the cylinder 17 into two spaces. The piston connecting rod 16 and the mover push rod 32 are respectively fixedly connected to the two end surfaces of the reciprocating piston 18. The piston connecting rod 16 is away from the reciprocating piston. 18 is provided with a connecting thread 9 on the end, and the connecting end cover 13 is provided with a through hole, the piston connecting rod 16 passes through the through hole and is threadedly connected with the piston connector 8, and the piston connecting rod 16 and the connecting end cover 13 A sealing ring 15 is provided at the contacting part, and a through hole is also provided on the end cover 28. The mover push rod 32 extends through the through hole into the displacement acceleration sensor to pass the reciprocating motion of the mover push rod 32. The displacement and acceleration information are measured, and the end cover sealing ring 35 is also provided at the contact point between the mover push rod 32 and the end cover 28; the cylinder wall at the end of the cylinder barrel 17 away from the piston connecting rod 16 is also provided with a reciprocating cylinder A port. 40. The reciprocating cylinder B port 46 and the reciprocating cylinder check valve interface 27, of which the reciprocating cylinder A port 40 and the reciprocating cylinder B port 46 are both connected to the solenoid valve oil circuit, and the reciprocating cylinder check valve interface 27 is connected to the one-way valve oil circuit. Connected.

The displacement acceleration sensor includes a sensor housing 31, an electromagnetic coil 30 and a sensor interface 33. The sensor housing 31 is fixedly connected to the end cover 28 through a sensor fastening screw 34. The electromagnetic coil 30 is placed in the sensor housing 31. , and surrounds the circumferential direction of the mover push rod 32 extending into the displacement acceleration sensor. The sensor interface 33 is provided at the end of the sensor housing 31 and is connected to the control display terminal.

The one-way valve includes a one-way valve solenoid coil 20, a one-way valve magnetic core 21, a one-way valve spool 24 and a return spring 25. There is a passage between the one-way valve magnetic core 21 and the one-way valve spool 24. The valve core connecting rod thread 23 is fixedly connected, the one-way valve solenoid coil 20 is arranged in the circumferential direction of the one-way valve magnetic core 21, and the return spring 25 is arranged between the one-way valve valve core 24 and the one-way valve valve end. The one-way valve is also provided with a one-way valve inlet 26 and a one-way valve outlet 22. The one-way valve inlet 26 is connected to the reciprocating oil cylinder one-way valve interface 27, and the one-way valve outlet 22 is connected to the external oil line 53. In order to communicate with each other, a one-way valve control interface 19 is also provided on the end face of the one-way valve, and the one-way valve control interface 19 is connected with the control display terminal.

The solenoid valve includes a solenoid valve body 47, a valve core 42, and a mover 36. The valve core 42 is arranged inside the solenoid valve body 47, and its two ends are respectively provided with a valve core spring I39 and a valve core spring II49, so One end of the valve core 42 is connected to the mover 36. The mover 36 is circumferentially provided with a solenoid valve coil 37. The solenoid valve is also provided with A port 41, B port 44, P port 43 and T port 45. The A port 41 and the B port 44 are connected to the reciprocating oil cylinder A port 40 and the reciprocating oil cylinder B port 46 respectively. The P port 43 and the T port 45 are both connected to the external oil line 53 and are provided by a high-pressure oil source. High-pressure oil, when the mover 36 does not move, the valve core 42 is in the initial position, and the high-pressure oil does not enter the internal channel of the solenoid valve and directly flows back to the tank of the high-pressure oil source. When the mover 36 moves downward, the valve core 42 is in the working position. , the high-pressure oil enters the solenoid valve through P port 43, and enters the reciprocating cylinder from the solenoid valve A port 41 through the reciprocating cylinder A port 40. When the cylinder pressure gradually reaches the required pressure value, the high-pressure oil passes through the reciprocating cylinder B port 46 and is discharged by the solenoid. The B port 44 of the valve returns to the oil tank through the T port 45. When the test required pressure value is established, the mover 36 moves upward, the valve core 42 is in the initial position, and the solenoid valve is closed. The end of the solenoid valve is also fixedly connected to a valve body end cover 50 through a valve body end cover screw 48. The solenoid valve is also provided with a solenoid valve control interface 38, and the solenoid valve control interface 38 is connected to the control display terminal. .

When testing the specimen, the valve core 42 of the solenoid valve moves downward, and the high-pressure hydraulic oil enters the solenoid valve through the P port 43, and then enters the upper chamber of the reciprocating oil cylinder through the A port 41 and the A port 40 of the reciprocating oil cylinder. The high-pressure hydraulic oil Push the reciprocating piston 18 to move downward, push the piston connector 8 through the piston connecting rod 16 and act on the force sensor 7, and further push the plunger 4 through the roller 2 to contact the inner curve guide specimen 1. At this time, the test is in the initial state; Driven by the linear motor 51, the inner curve guide rail specimen 1 moves at a linear speed according to the test operating speed of the inner curve hydraulic motor. At this time, the pressure of the high-pressure hydraulic oil in the upper chamber of the reciprocating cylinder is the inlet of the inner curve hydraulic motor. Working pressure, when the inner curve guide rail specimen 1 enters the descending section, the spool 42 of the solenoid valve moves downward and is in the working state, and the high-pressure hydraulic oil enters the upper chamber of the reciprocating cylinder through port A 41. At this time, the one-way The valve core 24 will block the one-way valve outlet 22 and the one-way valve inlet 26 channel. The high-pressure hydraulic oil in the upper chamber of the reciprocating cylinder indirectly pushes the plunger 4 to act on the inner curve guide specimen 1 through the roller 2 to achieve the internal curve. The active motion state of the curved hydraulic motor plunger; when the inner curved guide rail specimen 1 enters the ascending section, when the spool 42 of the solenoid valve moves upward and is in the initial working position, the high-pressure hydraulic oil no longer passes through the A port 41 and reciprocates Port A 40 of the oil cylinder enters the upper chamber of the reciprocating oil cylinder. At this time, the one-way valve spool 24 moves upward under the action of the one-way valve magnetic core 21. The one-way valve outlet 22 and the one-way valve inlet 26 are connected, and the upper part of the reciprocating oil cylinder The high-pressure hydraulic oil in the chamber pushes the roller 2 through the plunger 4 under the action of the inner curve guide rail specimen 1 and then pushes the reciprocating piston 18 upward and then discharges, realizing the driven motion state of the inner curve hydraulic motor plunger assembly. During this process, the displacement acceleration sensor tests the dynamic impact load of the inner curve motor stator rail-plunger assembly in real time, and transmits the test data to the control display terminal. The control display terminal can collect and output the test data in real time. At the same time, the test device also It is equipped with abnormal data alarm prompts to ensure safe and reliable operation of the test device.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. Any equivalent replacement of some or all of the technical features will not cause the essence of the corresponding technical solutions to depart from the protection scope of the present invention.

Claims (5)

1. An inner curve motor stator guide rail-plunger assembly impact load testing device, which is characterized in that: it mainly includes a control display terminal, a test system, an oil circuit (53), and a high-pressure oil source. The test system and the oil circuit (53 ) are installed on the test platform. The control display terminal is electrically connected to the test system, controls the operation of the test system and receives the data transmitted by the test system. The high-pressure oil source provides high-pressure oil to the test system through the oil line (53). The test platform An inner curved guide rail specimen (1) and a driving linear motor (51) are also installed on the test system. The inner curved guide rail specimen (1) is installed at the lower end of the test system and is connected to the driving linear motor (51); The test system mainly includes a plunger assembly, a plunger driving device, a one-way valve, a solenoid valve, a reciprocating oil cylinder and a displacement acceleration sensor. The reciprocating oil cylinder includes a cylinder barrel (17) and a reciprocating piston (18). The reciprocating piston (18) ) The interior of the cylinder (17) is divided into two spaces. The two ends of the reciprocating piston (18) are respectively fixedly connected with a piston connecting rod (16) and a mover push rod (32). The plunger driving device It is fixedly connected between the reciprocating oil cylinder and the plunger assembly, and is threadedly connected to the piston connecting rod (16). The end of the mover push rod (32) away from the reciprocating piston (18) extends into the displacement acceleration sensor. The acceleration sensor is connected to the control display terminal. The cylinder wall at one end of the cylinder tube (17) away from the piston connecting rod (16) is also provided with a reciprocating oil cylinder port A (40), a reciprocating oil cylinder port B (46) and a reciprocating oil cylinder. Check valve interface (27), the reciprocating cylinder is connected to the check valve oil circuit through the reciprocating cylinder check valve interface (27), and is also connected to the solenoid valve through the reciprocating cylinder A port (40) and the reciprocating cylinder B port (46) The oil circuit is connected, and the one-way valve and solenoid valve are connected with the oil circuit (53); The plunger assembly includes a roller (2), a roller bearing bush (3), a plunger (4) and a plunger guide rail (5). The roller (2) is assembled in the roller bearing bush (3), so The roller bearing bush (3) is arranged in the lower end surface of the plunger (4), and the plunger (4) is slidingly connected to the plunger guide rail (5); The plunger driving device includes a force sensor (7), a piston connector (8) and a plunger cylinder (10). The plunger guide rail (5) is fixedly arranged on the inner wall of the plunger cylinder (10). The force sensor (7) is arranged in the plunger cylinder (10), and force sensor screws (6) are provided on both sides of the force sensor (7). One end of the force sensor screw (6) is away from the plunger (4). One end of the roller bearing bush (3) is threaded, and the other end is threaded with the piston connector (8); The one-way valve is provided with a one-way valve inlet (26) and a one-way valve outlet (22). The one-way valve inlet (26) is connected with the reciprocating oil cylinder one-way valve interface (27). The valve outlet (22) is connected to the external oil line (53). The one-way valve magnetic core (21) and the one-way valve spool (24) are provided inside the one-way valve. The one-way valve magnetic core (24) 21) and the one-way valve core (24) are fixedly connected through the valve core connecting rod thread (23), and a return spring (25) is provided between the one-way valve core (24) and the one-way valve valve end. , the one-way valve magnetic core (21) is circumferentially provided with a one-way valve electromagnetic coil (20), the end face of the one-way valve is also provided with a one-way valve control interface (19), the one-way valve control interface (19) 19) Connected to the control display terminal; The solenoid valve includes a solenoid valve body (47), a valve core (42), and a mover (36). The valve core (42) is arranged inside the solenoid valve body (47), and valves are respectively provided at both ends of the solenoid valve body (47). Core spring I (39) and valve core spring II (49), one end of the valve core (42) is connected to the mover (36), and the mover (36) is circumferentially provided with a solenoid valve coil (37), The solenoid valve is also provided with solenoid valve A port (41), solenoid valve B port (44), solenoid valve P port (43) and solenoid valve T port (45). The solenoid valve A port (41) and The solenoid valve B port (44) is connected to the reciprocating oil cylinder A port (40) and the reciprocating oil cylinder B port (46) respectively. The solenoid valve P port (43) and the solenoid valve T port (45) are both connected to the external oil Road (53) is connected, the end of the solenoid valve is also fixedly connected to the valve body end cover (50) through the valve body end cover screw (48), and the solenoid valve is also provided with a solenoid valve control interface (38). The solenoid valve control interface (38) is connected with the control display terminal; When testing the specimen, the valve core (42) of the solenoid valve moves downward, and the high-pressure hydraulic oil enters the solenoid valve through the P port (43) of the solenoid valve, and then passes through the solenoid valve A port (41). Port A (40) of the reciprocating oil cylinder enters the upper chamber of the reciprocating oil cylinder. High-pressure hydraulic oil pushes the reciprocating piston (18) to move downward, and pushes the piston connector (8) through the piston connecting rod (16). Then it acts on the force sensor (7) to further push the plunger (4) through the roller (2) to contact the inner curve guide rail specimen (1). At this time, the test is in the initial state; The inner curve guide rail specimen (1) is driven by the linear motor (51) and moves at a linear speed according to the test operating speed of the inner curve hydraulic motor. At this time, the pressure of the high-pressure hydraulic oil in the upper chamber of the reciprocating cylinder is the inner curve Working pressure at the inlet of the hydraulic motor; When the inner curve guide rail specimen (1) enters the descending section, the valve core (42) of the solenoid valve moves downward and is in the working state, and the high-pressure hydraulic oil enters the reciprocating flow through the solenoid valve A port (41). In the upper chamber of the oil cylinder, the one-way valve spool (24) will block the one-way valve outlet (22) and one-way valve inlet (26) channels, and the high-pressure hydraulic oil in the upper chamber of the reciprocating oil cylinder The plunger (4) is indirectly pushed to act on the inner curve guide rail specimen (1) through the roller (2) to realize the active power movement state of the inner curve hydraulic motor plunger; When the inner curve guide specimen (1) enters the ascending section, and the valve core (42) of the solenoid valve moves upward and is in the initial working position, the high-pressure hydraulic oil no longer passes through port A (41) of the solenoid valve. ) and port A (40) of the reciprocating oil cylinder enter the upper chamber of the reciprocating oil cylinder. At this time, the one-way valve core (24) moves upward under the action of the one-way valve magnetic core (21). The valve outlet (22) and the one-way valve inlet (26) are connected, and the high-pressure hydraulic oil in the upper chamber of the reciprocating oil cylinder pushes the roller (2) through the inner curve guide specimen (1). The plunger (4) then pushes the reciprocating piston (18) to move upward and discharge, thereby realizing the driven motion state of the internal curve hydraulic motor plunger assembly. 2. An internal curve motor stator guide rail-plunger assembly impact load testing device as claimed in claim 1, characterized in that: the reciprocating oil cylinder further includes a connection end cover (13) and a reciprocating oil cylinder end cover (28), The connecting end cover (13) is arranged between the plunger driving device and the reciprocating oil cylinder, and is fixedly connected to the plunger cylinder (10) through bolts (11). At the same time, the connecting end cover (13) is also connected through fastening screws (14). ) is fixedly connected to the cylinder barrel (17). The reciprocating oil cylinder end cover (28) is provided between the reciprocating oil cylinder and the displacement acceleration sensor, and is fixedly connected to the cylinder barrel (17) through the end cover screw (29). The reciprocating oil cylinder end cover (28) is The oil cylinder end cover (28) is also provided with a through hole, and the mover push rod (32) passes through the through hole. 3. An internal curve motor stator guide rail-plunger assembly impact load testing device according to claim 2, characterized in that: the displacement acceleration sensor includes a sensor housing (31), an electromagnetic coil (30) and a sensor interface (33), the sensor housing (31) is fixedly connected to the reciprocating cylinder end cover (28) through the sensor fastening screw (34), the electromagnetic coil (30) is placed in the sensor housing (31), and surrounds In the circumferential direction of the mover push rod (32) extending into the displacement acceleration sensor, the sensor interface (33) is provided at the end of the sensor housing (31) and communicates with the control display terminal. 4. An internal curve motor stator guide rail-plunger assembly impact load testing device according to claim 3, characterized in that: a seal is provided between the connection end cover (13) and the plunger cylinder (10) Pad (12), a sealing ring (15) is provided at the contact point between the piston connecting rod (16) and the connecting end cover (13), and the mover push rod (32) is in contact with the reciprocating cylinder end cover (28). The contact part is provided with an end cover sealing ring (35). 5. An internal curve motor stator guide rail-plunger assembly impact load testing device according to any one of claims 1 to 4, characterized in that: a height adjustment motor (52) is also installed at the bottom of the test platform.