CN115899021B - Internally curved motor plunger assembly movement and output torque pulsation testing device - Google Patents
Internally curved motor plunger assembly movement and output torque pulsation testing device Download PDFInfo
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- CN115899021B CN115899021B CN202310170040.XA CN202310170040A CN115899021B CN 115899021 B CN115899021 B CN 115899021B CN 202310170040 A CN202310170040 A CN 202310170040A CN 115899021 B CN115899021 B CN 115899021B
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Abstract
The invention relates to the field of inner curve hydraulic motor testing, in particular to a device for testing movement and output torque pulsation of an inner curve motor plunger assembly, which mainly comprises a pressure oil source, an oil way, a servo valve control system, a test valve block and a control display terminal.
Description
Technical Field
The invention relates to the field of internal curve hydraulic motor testing, in particular to a device for testing the movement and output torque pulsation of a plunger assembly of an internal curve motor.
Background
In recent years, with the development of the manufacturing industry of Chinese equipment, the demand of low-speed large-torque inner curve hydraulic motors on large-scale engineering machinery, shield machines and marine exploration equipment is increased year by year, and meanwhile, the motors are required to have lower stable rotating speed, lower vibration intensity and radiation noise level, so that the structural dynamic characteristics of the inner curve hydraulic motors need to be mastered for the structural design of the inner curve hydraulic motors. The working characteristics and the output torque pulsation characteristics of the plunger assembly of the inner curve hydraulic motor during movement are important indexes for evaluating the overall performance of the inner curve hydraulic motor, and meanwhile, the vibration noise characteristics of the overall structure of the inner curve hydraulic motor, the stability characteristics and the working reliability of the torque load output of the whole machine are also influenced, so that the method is an important consideration of the forward design of the inner curve hydraulic motor.
The research of the working characteristics of the plunger assembly in the working process of the inner curve hydraulic motor is mainly realized by a simulation calculation method, the research experiment verification of the formed impact load is difficult to realize, the research experiment is mainly realized in that each component part is arranged in the hydraulic motor, the torque pulsation information of the component part can be tested only by a test bed, then the reverse calculation is carried out by data, the test is limited by conditions, and the accuracy and the reliability of the reverse analysis are not ensured.
At present, the working characteristics and output torque pulsation characteristics of the plunger assembly of the inner curve hydraulic motor are tested mainly by means of a universal hydraulic motor test bed, the working characteristics of the plunger assembly of the inner curve hydraulic motor are measured by testing the torque pulsation of an output shaft of the hydraulic motor under the condition of given pressure and flow, and meanwhile, the surface vibration characteristics of the plunger assembly of the inner curve hydraulic motor are tested by arranging a test sensor outside the structure of the inner curve motor to analyze, so that the impact load born by the structure is evaluated. The existing test process mainly depends on a hydraulic motor complete machine test bench, the degree of dependence on test equipment is high, meanwhile, because the whole size of the test equipment is large, the operation control is complex, the installation and debugging and the later maintenance required by the test are both required by high labor cost and high energy consumption, the test process is not easy to realize the test of the movement characteristics of the internal components, and the test precision and the test data matching are not accurate enough.
Therefore, a plunger assembly and an output torque characteristic test device of an overall internal curve motor can be omitted, so that test efficiency of the design stage of the internal curve motor is improved, and development test cost of the hydraulic motor is reduced.
Disclosure of Invention
The invention provides a device for testing the motion and output torque pulsation of an inner curve motor plunger assembly, which aims to solve the problems that the existing test relies on a complete machine test bed, is complex to operate and control, has high use and maintenance cost, has insufficient test precision and the like in the background technology.
The invention provides a motion and output torque pulsation testing device of an inner curve motor plunger assembly, which mainly comprises a pressure oil source, an oil way, a servo valve control system, a testing valve block and a control display terminal, wherein the pressure oil source, the oil way and the servo valve control system are all arranged on an installation base, the pressure oil source is connected with the servo valve control system through the oil way to provide high-pressure oil for the servo valve control system, hydraulic oil discharged by the servo valve control system flows into the testing valve block for testing, the testing result is fed back to the control display terminal, and the servo valve control system is connected with the control display terminal through an external port and is controlled by the control display terminal; the servo valve control system mainly comprises a flow cylinder, a reciprocating cylinder displacement acceleration sensor and an electromagnetic control valve, wherein two end faces of the reciprocating cylinder are fixedly connected with the flow cylinder and the reciprocating cylinder displacement acceleration sensor respectively, the flow cylinder comprises a flow cylinder barrel and a piston arranged in the flow cylinder barrel, a flow cylinder oil inlet and a flow cylinder oil outlet are also arranged on the flow cylinder barrel, the reciprocating cylinder comprises a reciprocating cylinder barrel and a reciprocating piston arranged in the reciprocating cylinder barrel, the reciprocating piston divides the interior of the reciprocating cylinder barrel into two spaces, a reciprocating cylinder A port and a reciprocating cylinder B port are arranged on the reciprocating cylinder barrel and are used for being communicated with an oil way of the electromagnetic control valve, and the reciprocating cylinder A port and the reciprocating cylinder B port are respectively arranged on two sides of the reciprocating piston; and the test valve block is provided with a flow sensor and a pressure sensor for testing flow values and pressure values of hydraulic oil discharged by the servo valve control system.
Further, one end of the flow cylinder, which is far away from the reciprocating cylinder, is provided with a flow cylinder end cover, the flow cylinder end cover is fixedly connected with the flow cylinder through a flow cylinder screw, a piston connecting thread is arranged on one end of the piston, which is close to the reciprocating cylinder, a piston connecting rod and a piston push rod are respectively fixedly connected with two end faces of the reciprocating piston, one end of the piston connecting rod, which is far away from the reciprocating piston, is connected with the piston in the flow cylinder through the piston connecting thread, a connecting end cover is arranged between the flow cylinder and the reciprocating cylinder, is fixedly connected with the flow cylinder through a flow cylinder screw and is fixedly connected with the reciprocating cylinder through a connecting end cover screw, a through hole is arranged on the connecting end cover, the piston connecting rod penetrates through the through hole and is connected with the piston, and one end, which is connected with the reciprocating cylinder displacement acceleration sensor, of the reciprocating cylinder end cover is fixedly connected with the reciprocating cylinder through the reciprocating cylinder screw.
Further, the reciprocating cylinder displacement acceleration sensor comprises a sensor shell, an electromagnetic coil and a reciprocating cylinder displacement acceleration sensor interface, the electromagnetic coil is arranged in the sensor shell, the reciprocating cylinder displacement acceleration sensor interface is arranged at one end of the sensor shell far away from the reciprocating cylinder and is connected with the control display terminal, the sensor shell is fixedly connected with a reciprocating cylinder end cover through a sensor fastening screw, a through hole is formed in the reciprocating cylinder end cover, and the piston push rod penetrates through the through hole and stretches into the sensor shell.
Further, the electromagnetic control valve comprises an electromagnetic valve shell, an electromagnetic valve magnetic core, an electromagnetic valve coil, an electromagnetic valve control port, an electromagnetic valve core, a valve core spring I, an electromagnetic valve body, a valve core spring II and a valve body end cover, wherein the electromagnetic valve shell is fixedly connected with the electromagnetic valve body through an electromagnetic valve fastening screw, the electromagnetic valve coil is arranged on an electromagnetic valve coil supporting frame in the electromagnetic valve shell, the electromagnetic valve magnetic core is arranged in the electromagnetic valve coil, the electromagnetic valve control port is arranged on the surface of the electromagnetic valve shell and is connected with a control display terminal, one end of the electromagnetic valve core is connected with the electromagnetic valve core, 4 high-pressure oil circulation ports are further arranged in the electromagnetic control valve, the electromagnetic control valve comprises a T port, an A port, a P port and a B port, the A port is communicated with the A port of a reciprocating cylinder, the B port is communicated with the oil path, the T port and the P port are respectively arranged at two ends inside the electromagnetic control valve, the outer end surface of the electromagnetic valve core spring II is provided with a spring cover, and the valve body end cover is far away from one end surface of the electromagnetic valve body through the valve body end cover and is fixedly connected with the electromagnetic valve body.
Further, the oil circuit includes low pressure oil circuit, work output oil circuit, high pressure oil circuit, oil compensating return circuit, output oil circuit check valve and oil compensating return circuit check valve, the pressure oil source is connected to high pressure oil circuit one end, and one end is put through with the P mouth mutually, the pressure oil source oil tank is connected to low pressure oil circuit one end, and one end is put through with the T mouth mutually, work output oil circuit and flow cylinder oil-out intercommunication, and installs the output oil circuit check valve, oil compensating return circuit and flow cylinder oil inlet intercommunication, and install oil compensating return circuit check valve.
Further, the test valve block further comprises a working output oil way interface, a throttle valve and an oil return oil way, wherein the working output oil way interface is connected with the working output oil way, hydraulic oil discharged by the servo valve control system is converged in the working output oil way, enters the test valve block through the working output oil way interface, sequentially passes through the pressure sensor and the flow sensor, finally flows out of the test valve block through the oil return oil way and flows back to the oil tank, and the throttle valve is arranged on an oil drain pipe of the test valve block.
Further, a piston sealing ring is arranged at the contact position of the piston and the flow cylinder barrel, a sealing gasket is arranged between the flow cylinder barrel and the connecting end cover, and a push rod sealing ring is arranged at the joint of the piston push rod and the reciprocating cylinder end cover.
Furthermore, a spring gland sealing ring is arranged at the contact part of the spring gland and the electromagnetic valve body.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. small volume, low cost, and multiple functions
The device is provided with a servo valve control system, a high-pressure oil source supply system and a data acquisition and detection system, the systems are connected compactly, the total volume is small, the opening and closing of an oil inlet can be completed through the control system so as to realize the movement of a piston in an oil cylinder, the oil in the flow oil cylinder is promoted to be sucked and discharged, the same working performance as the movement of an inner curve hydraulic motor plunger assembly is realized, the discharged oil of a plurality of groups of hydraulic cylinders passes through a test valve block, the combined flow and the pressure during oil discharge can be detected in real time, the flow pulsation and the torque pulsation information during the working of the multi-plunger assembly can be obtained by using the combined flow and the pressure as information, and the working characteristic of the inner curve hydraulic motor can be obtained.
2. Plunger assembly stroke size is adjustable, and loading frequency is variable
The device is fixed on a rack in the testing process, the reciprocating motion of a piston in an oil cylinder is controlled by a servo valve control system according to the working stroke data information of the plunger assembly of the inner curve motor, the functions of sucking and discharging oil of the plunger assembly are realized, the conversion frequency of the servo valve control system can be determined according to the number of plungers and the action stroke of the inner curve motor, and matching adjustment is carried out according to the testing working condition.
3. Real-time monitoring control and test device safe and reliable
The device is connected with a hydraulic oil source to provide high-pressure hydraulic oil, the oil cylinder is used for sucking and discharging oil according to a servo valve control system, an overflow valve is arranged on an oil way to improve the accurate control of loading pressure of each plunger, and a flow sensor and a pressure sensor are arranged on a converging oil way of the testing device and used for monitoring the state of the device in real time and displaying the state in a control display terminal, and meanwhile, the testing device is guaranteed to have higher safety.
4. The test device is replaceable in structure and suitable for multiple types of elements
The device can change the number, the diameter and the stroke of the flow oil cylinders according to the structural parameters of the plunger moving parts of the tested hydraulic pump and motor, match the structural parameters of the tested hydraulic element, realize the test of the pulsation characteristic of the working flow and the dynamic characteristic of the internal moving parts, and assist the verification test work in the design and development stages of the hydraulic pump and motor products.
5. The test system has perfect function and can record data in real time
The device is provided with a multipoint movement displacement, acceleration, pressure and flow test system, test data can be analyzed and judged in real time by collecting and outputting the test data in real time, the test data can be recorded and saved, and a picture report can be formed for the data so as to prepare a document for output.
Drawings
FIG. 1 is a schematic diagram of an apparatus for testing the motion and output torque ripple of an inner curve motor plunger assembly according to the present invention;
FIG. 2 is a cross-sectional view of a servo valve control system according to the present invention;
FIG. 3 is a schematic cross-sectional view of a test valve block of the present invention;
fig. 4 is a schematic cross-sectional view of an oil passage in the present invention.
In the figure: 1-a flow cylinder screw; 2-a flow cylinder end cover; 3-an oil outlet of the flow oil cylinder; 4-a flow cylinder barrel; 5-a piston seal ring; 6-a piston; 7-piston connecting threads; 8-a flow cylinder bolt; 9-a gasket; 10-connecting an end cover; 11-connecting end cap screws; 12-a reciprocating cylinder barrel; 13-piston connecting rod; 14-a reciprocating piston; 15-a piston push rod; 16-a push rod sealing ring; 17-a reciprocating cylinder end cover; 18-a reciprocating cylinder screw; 19-sensor fastening screws; 20-a sensor housing; 21-an electromagnetic coil; 22-a reciprocating cylinder displacement acceleration sensor interface; 23-a port of the reciprocating cylinder A; 24-solenoid valve fastening screws; 25-an electromagnetic valve housing; 26-a solenoid coil support; 27-a solenoid valve core; 28-solenoid valve coil; 29-solenoid valve control port; 30-a solenoid valve core; 31-a valve core spring I; a 32-T port; 33-A port; 34-P port; a port 35-B; 36-electromagnetic valve body; 37-valve core spring II; 38-spring gland sealing rings; 39-valve body end cap screw; 40-valve body end cap; 41-spring gland; 42-a port B of the reciprocating cylinder; 43-a flow cylinder oil inlet; 44-a low-pressure oil path; 45-working output oil way; 46-a high-pressure oil path; 47-oil make-up circuit; 48-outputting an oil way check valve; 49-oil supplementing loop check valve; 50-a work output oil way interface; 51-pressure sensor; 52-a flow sensor; 53-throttle valve; 54-an oil return way; 55-mounting base.
Detailed Description
The technical scheme of the invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in FIG. 1, the device for testing the motion and output torque pulsation of the plunger assembly of the inner curve motor mainly comprises a pressure oil source, an oil path, a servo valve control system, a test valve block and a control display terminal, wherein the pressure oil source, the oil path and the servo valve control system are all arranged on a mounting base 55, the pressure oil source is connected with the servo valve control system through the oil path to provide high-pressure oil for the servo valve control system, hydraulic oil discharged by the servo valve control system flows into the test valve block for testing, a test result is fed back to the control display terminal, and the servo valve control system is connected with the control display terminal through an external port and is controlled by the control display terminal.
Specifically, as shown in fig. 1, the number of the servo valve control systems in the testing device is 8, and the servo valve control systems are installed on an oil path in a parallel connection mode, and the number of the servo valve control systems is selected according to the number of radial plungers of the inner curve hydraulic motor so as to be beneficial to simulating torque pulsation characteristics formed in the working process of the inner curve hydraulic motor. In some embodiments, if only the coupling working effect of a single plunger or multiple plungers is studied, 1 servo valve control system or a plurality of servo valve control systems can be installed on the oil path, so that the aim of experimental study is fulfilled.
As shown in FIG. 2, the servo valve control system mainly comprises a flow oil cylinder, a reciprocating oil cylinder displacement acceleration sensor and an electromagnetic control valve, wherein the flow oil cylinder and the reciprocating oil cylinder displacement acceleration sensor are respectively and fixedly connected to two sides of the reciprocating oil cylinder, and the electromagnetic control valve is communicated with an oil inlet and outlet path of the reciprocating oil cylinder.
The cylinder body of the flow cylinder is mainly formed by fastening and connecting a flow cylinder end cover 2 with a flow cylinder barrel 4 through a flow cylinder screw 1, a piston 6 is arranged in the flow cylinder, a piston sealing ring 5 is arranged at the contact part of the piston 6 and the inner wall of the flow cylinder, so that oil bodies at two sides of the piston 6 cannot flow in series, meanwhile, a flow cylinder oil outlet 3 and a flow cylinder oil inlet 43 are arranged on the cylinder wall of one side of the flow cylinder barrel 4, which is close to the flow cylinder end cover 2, and are communicated with an external oil way, and the inlet and the outlet of the oil bodies in the flow cylinder are realized through the reciprocating movement of the piston 6.
The reciprocating cylinder is arranged at one end of the flow cylinder far away from the end cover of the flow cylinder, the cylinder body of the reciprocating cylinder is mainly composed of a connecting end cover 10, a reciprocating cylinder barrel 12 and a reciprocating cylinder end cover 17, the flow cylinder barrel 4 is connected with the connecting end cover 10 of the reciprocating cylinder through a flow cylinder bolt 8 to form a coaxial structure, a sealing gasket 9 is arranged between the flow cylinder barrel 4 and the connecting end cover 10 so as to realize sealing of oil, fastening is realized between the connecting end cover 10 and the reciprocating cylinder barrel 12 through a connecting end cover screw 11, the reciprocating cylinder end cover 17 is arranged at one side port of the reciprocating cylinder far away from the connecting end cover 10 and is fixedly connected with the reciprocating cylinder barrel 12 through a reciprocating cylinder screw 18, a reciprocating piston 14 is further arranged in the reciprocating cylinder barrel 12, the reciprocating piston 14 divides the interior of the reciprocating cylinder into two spaces, a piston connecting rod 13 and a piston push rod 15 are respectively fixedly connected with two end surfaces of the reciprocating piston 14, the piston connecting rod 13 is arranged at one end surface of the reciprocating piston 14 close to the connecting end cover 10, a through hole is arranged on the connecting end cover 10, a piston connecting rod 7 is arranged on the piston 6, the piston connecting rod 13 penetrates through the through hole and is connected with the piston 6 through the connecting screw 7, the piston connecting screw 7 so that the reciprocating piston 14 can drive the piston rod 13 to the two oil inlets and the two oil outlets 23 are respectively arranged at the two sides of the reciprocating cylinder barrel 12.
The reciprocating cylinder displacement acceleration sensor comprises a sensor shell 20, an electromagnetic coil 21 and a reciprocating cylinder displacement acceleration sensor interface 22, wherein the sensor shell 20 is fixedly connected with a reciprocating cylinder end cover 17 through a sensor fastening screw 19, the electromagnetic coil 21 is arranged in the sensor shell 20, the reciprocating cylinder displacement acceleration sensor interface 22 is arranged at the end part of the sensor shell 20 and is communicated with a control display terminal, a through hole is formed in the reciprocating cylinder end cover 17, a piston push rod 15 penetrates through the through hole and stretches into the electromagnetic coil 21, so that the piston push rod 15 can finish the output of displacement and acceleration information by means of the electromagnetic coil 21, and in addition, a push rod sealing ring 16 is arranged between the piston push rod 15 and the reciprocating cylinder end cover 17 so as to prevent oil in the reciprocating cylinder from entering the reciprocating cylinder displacement acceleration sensor.
The electromagnetic control valve mainly comprises an electromagnetic valve shell 25, an electromagnetic valve core 27, an electromagnetic valve coil 28, an electromagnetic valve control port 29, an electromagnetic valve core 30, a valve core spring I31, an electromagnetic valve body 36, a valve core spring II 37 and a valve body end cover 40, wherein the electromagnetic valve shell 25 is fixedly connected with the electromagnetic valve body 36 through an electromagnetic valve fastening screw 24, the electromagnetic valve coil 28 is arranged on an electromagnetic valve coil supporting frame 26 in the electromagnetic valve shell 25, the electromagnetic valve core 27 is arranged in the electromagnetic valve coil 28, the electromagnetic valve control port 29 is arranged on the surface of the electromagnetic valve shell 25 and is communicated with a control display terminal, the electromagnetic valve reads plunger stroke parameters of a curve hydraulic motor in the control terminal through the electromagnetic valve control port 29, the electromagnetic valve core 30 is driven to move through the electromagnetic valve core 27, one end of the electromagnetic valve core 30 is connected with the electromagnetic valve core 27, 4 high-pressure oil circulation ports including a port 32, an A port 33, a P port 34 and a B port 35 are also arranged in the electromagnetic valve control valve, wherein the A port 33 is communicated with the A port 23 of a reciprocating cylinder, the B port 42, the T port 32 and the P port 34 are communicated with an external oil way, the electromagnetic valve core 32 and the P port 34 are communicated with the electromagnetic valve core end cover 36, the electromagnetic valve core end cover 36 is arranged at one side of the electromagnetic valve core 30, which is far away from the electromagnetic valve body 36, and is connected with the electromagnetic valve body end cover 36 through the electromagnetic valve core 27, and is provided with the electromagnetic valve body end cover 36, and is provided with the electromagnetic valve body end cover 41, and is far from the electromagnetic valve body.
As shown in fig. 4, the oil path in the device comprises a low-pressure oil path 44, a working output oil path 45, a high-pressure oil path 46, an oil supplementing loop 47, an output oil path check valve 48 and an oil supplementing loop check valve 49, wherein one end of the high-pressure oil path 46 is connected with a pressure oil source, one end of the high-pressure oil path is communicated with the P port 34, one end of the low-pressure oil path 44 is connected with a pressure oil source oil tank, one end of the low-pressure oil path is communicated with the T port 32, the working output oil path 45 is communicated with the oil outlet 3 of the flow oil cylinder, the output oil path check valve 48 is arranged, the oil supplementing loop 47 is communicated with the oil inlet 43 of the flow oil cylinder, and the oil supplementing loop check valve 49 is arranged.
As shown in fig. 3, the test valve block mainly comprises a working output oil path interface 50, a pressure sensor 51, a flow sensor 52, a throttle valve 53 and an oil return oil path 54, wherein the working output oil path interface 50 is connected with a working output oil path 45, hydraulic oil discharged by the servo valve control system enters the test valve block through the working output oil path 45 and the working output oil path interface 50, and flows out of the test valve block through the pressure sensor 51 and the flow sensor 52 successively and finally flows out of the oil return oil path 54, and the throttle valve 53 is arranged on an oil discharge pipe of the test valve block.
When the testing device works, a servo valve control system reads and controls plunger stroke parameters of an inner curve hydraulic motor in a display terminal through an electromagnetic valve control port 29, the electromagnetic valve core 30 is driven to move through the movement of an electromagnetic valve magnetic core 27, when the electromagnetic valve core 30 is positioned at the right position, high-pressure oil enters the electromagnetic valve through a P port 34 and enters a left cavity of a reciprocating cylinder through a B port 35, the reciprocating piston 14 is pushed to drive a piston connecting rod 13 to move rightwards, a piston 6 in the flow cylinder is pulled to move rightwards, at the moment, an oil outlet 3 of the flow cylinder is closed under the action of an output oil way check valve 48, the flow cylinder is subjected to oil supplementing through an oil supplementing loop 47 through an oil inlet 43 of the flow cylinder, and hydraulic oil in the cavity on the right side of the reciprocating cylinder flows back into the oil tank through an internal channel from a T port 32 through an internal channel and a low-pressure oil way 44 through an A port 33 of the electromagnetic control valve; when the valve core 30 of the electromagnetic valve is at the left position, high-pressure oil enters the electromagnetic valve through the P port 34 and enters the right cavity of the reciprocating cylinder through the A port 33, the reciprocating piston 14 is pushed to drive the piston connecting rod 13 to move leftwards, the piston 6 is pushed to move leftwards, at the moment, the oil inlet 43 of the flow cylinder is closed under the action of the one-way valve 49 of the oil supplementing loop, the oil cavity discharges oil through the oil outlet 3 of the flow cylinder and enters the working output oil path 45, and at the moment, hydraulic oil in the left cavity of the reciprocating cylinder flows back into the oil tank through the T port 32 and the low-pressure oil path 44 through the internal channel through the B port 35 of the electromagnetic control valve through the B port 42 of the reciprocating cylinder. The displacement and acceleration values of the piston motion are measured by the reciprocating cylinder displacement acceleration sensor through the motion of the piston push rod 15 in the whole motion process, parameters are output outwards through the reciprocating cylinder displacement acceleration sensor interface 22, hydraulic oil discharged by the flow cylinder enters the inside of the test valve block through the working output oil way 45 and the working output oil way interface 50 to perform the test of confluence pulsation and pressure, and finally flows out of the test valve block through the return oil way 54 to flow back to the oil tank of the pressure oil source.
The above embodiments are only for illustrating the technical solution of the present invention, but not for limiting the same, and any equivalent substitution of some or all technical features thereof does not make the essence of the corresponding technical solution deviate from the protection scope of the present invention.
Claims (3)
1. An inner curve motor plunger assembly motion and output torque pulsation testing device is characterized in that: the hydraulic oil flow control system mainly comprises a pressure oil source, an oil way, a servo valve control system, a test valve block and a control display terminal, wherein the pressure oil source, the oil way and the servo valve control system are all arranged on a mounting base (55), the pressure oil source is connected with the servo valve control system through the oil way to provide high-pressure oil for the servo valve control system, hydraulic oil discharged by the servo valve control system flows into the test valve block for testing, a test result is fed back to the control display terminal, and the servo valve control system is connected with the control display terminal through an external port and is controlled by the control display terminal;
the servo valve control system mainly comprises a flow cylinder, a reciprocating cylinder displacement acceleration sensor and an electromagnetic control valve, wherein two end surfaces of the reciprocating cylinder are fixedly connected with the flow cylinder and the reciprocating cylinder displacement acceleration sensor respectively, the flow cylinder comprises a flow cylinder barrel (4) and a piston (6) arranged in the flow cylinder barrel (4), a flow cylinder oil inlet (43) and a flow cylinder oil outlet (3) are further arranged on the flow cylinder barrel (4), the reciprocating cylinder comprises a reciprocating cylinder barrel (12) and a reciprocating piston (14) arranged in the reciprocating cylinder barrel (12), the reciprocating piston (14) divides the interior of the reciprocating cylinder barrel (12) into two spaces, a reciprocating cylinder A port (23) and a reciprocating cylinder B port (42) are arranged on the reciprocating cylinder barrel (12) and are used for being communicated with oil paths of the electromagnetic control valve, and the reciprocating cylinder A port (23) and the reciprocating cylinder B port (42) are used for dividing two sides of the reciprocating piston;
the test valve block is provided with a flow sensor (52), a pressure sensor (51) and a throttle valve (53) for testing flow values and pressure values of hydraulic oil discharged by the servo valve control system;
the flow cylinder is characterized in that one end, far away from the reciprocating cylinder, of the flow cylinder is provided with a flow cylinder end cover (2), the flow cylinder end cover (2) is fixedly connected with a flow cylinder barrel (4) through a flow cylinder screw (1), one end, close to the reciprocating cylinder, of the piston (6) is provided with a piston connecting thread (7), two end faces of the reciprocating piston (14) are fixedly connected with a piston connecting rod (13) and a piston push rod (15) respectively, one end, far away from the reciprocating piston (14), of the piston connecting rod (13) is connected with the piston (6) in the flow cylinder through the piston connecting thread (7), a connecting end cover (10) is arranged between the flow cylinder and the reciprocating cylinder, the connecting end cover (10) is fixedly connected with the flow cylinder barrel (4) through a flow cylinder screw (8), and is fixedly connected with the reciprocating cylinder barrel (12) through a connecting end cover screw (11), a through hole is formed in the connecting end cover (10), the piston connecting rod (13) penetrates through the through hole to be connected with the piston (6), one end, connected with a reciprocating cylinder displacement acceleration sensor of the reciprocating cylinder is provided with the reciprocating cylinder end cover (17), and the reciprocating cylinder barrel (18) is fixedly connected with the reciprocating cylinder barrel (12) through the flow cylinder screw;
the reciprocating cylinder displacement acceleration sensor comprises a sensor shell (20), an electromagnetic coil (21) and a reciprocating cylinder displacement acceleration sensor interface (22), wherein the electromagnetic coil (21) is arranged in the sensor shell (20), the reciprocating cylinder displacement acceleration sensor interface (22) is arranged at one end, far away from the reciprocating cylinder, of the sensor shell (20) and is connected with the control display terminal, the sensor shell (20) is fixedly connected with a reciprocating cylinder end cover (17) through a sensor fastening screw (19), a through hole is formed in the reciprocating cylinder end cover (17), and a piston push rod (15) penetrates through the through hole and stretches into the sensor shell (20);
the electromagnetic control valve comprises an electromagnetic valve shell (25), an electromagnetic valve magnetic core (27), an electromagnetic valve coil (28), an electromagnetic valve control port (29), an electromagnetic valve core (30), a valve core spring I (31), an electromagnetic valve body (36), a valve core spring II (37) and a valve body end cover (40), wherein the electromagnetic valve shell (25) is fixedly connected with the electromagnetic valve body (36) through an electromagnetic valve fastening screw (24), the electromagnetic valve coil (28) is arranged on an electromagnetic valve coil supporting frame (26) in the electromagnetic valve shell (25), the electromagnetic valve magnetic core (27) is arranged in the electromagnetic valve coil (28), the electromagnetic valve control port (29) is arranged on the surface of the electromagnetic valve shell (25) and is connected with the control display terminal, one end of the electromagnetic valve core (30) is connected with the electromagnetic valve core (27), 4 high-pressure oil circulation ports are also arranged in the electromagnetic control valve, the electromagnetic valve shell comprises an electromagnetic control valve T port (32), an electromagnetic control valve A port (33), an electromagnetic control valve P port (34) and an electromagnetic control valve B port (35), the electromagnetic control valve A port (33) is communicated with a reciprocating cylinder A port (23), the electromagnetic valve B port (35) is communicated with the electromagnetic valve T port (34) and the electromagnetic valve P port (32), the valve core spring I (31) and the valve core spring II (37) are respectively arranged at two ends of the inside of the electromagnetic control valve, a spring gland (41) is arranged on the outer end face of the valve core spring II (37), and the valve body end cover (40) is arranged on one end face, far away from the electromagnetic valve shell (25), of the electromagnetic valve body (36) and is fixedly connected with the electromagnetic valve body (36) through a valve body end cover screw (39);
the application method of the inner curve motor plunger assembly movement and output torque pulsation testing device comprises the following steps:
the servo valve control system reads and controls plunger stroke parameters of an inner curve hydraulic motor in a display terminal through a solenoid valve control port (29), a solenoid valve core (27) moves to drive a solenoid valve core (30) to move, when the solenoid valve core (30) is in a right position, high-pressure oil enters the solenoid control valve through a solenoid control valve P port (34) through a high-pressure oil path (46), enters a left cavity of a reciprocating cylinder through a solenoid control valve B port (35), pushes a reciprocating piston (14) to drive a piston connecting rod (13) to move rightwards, simultaneously pulls a piston (6) in a flow cylinder to move rightwards, at the moment, a flow cylinder oil outlet (3) is closed under the action of an output oil path one-way valve (48), oil is replenished through a flow cylinder oil inlet (43) by a flow cylinder oil replenishing loop (47), and hydraulic oil in the right cavity of the reciprocating cylinder flows back into an oil tank through a low-pressure oil path (44) through a solenoid control valve A port (33) through an internal channel by a solenoid control valve T port (32); when the solenoid valve core (30) is at the left position, high-pressure oil enters the solenoid control valve through the solenoid control valve P port (34), enters the cavity on the right side of the reciprocating cylinder through the solenoid control valve A port (33), pushes the reciprocating piston (14) to drive the piston connecting rod (13) to move leftwards, simultaneously pushes the piston (6) to move leftwards, at the moment, the flow cylinder oil inlet (43) is closed under the action of the oil supplementing loop check valve (49), the oil cavity is discharged through the flow cylinder oil outlet (3) and enters the working output oil way (45), and at the moment, hydraulic oil in the cavity on the left side of the reciprocating cylinder flows back into the oil tank through the electromagnetic control valve B port (35) through the internal channel by the solenoid control valve T port (32) and through the low-pressure oil way (44); the whole motion process is to measure the displacement and acceleration values of the piston motion by a reciprocating cylinder displacement acceleration sensor through the motion of a piston push rod (15), and to output parameters outwards by a reciprocating cylinder displacement acceleration sensor interface (22), wherein hydraulic oil discharged by a flow cylinder enters the inside of a test valve block through a working output oil way (45) and a working output oil way interface (50) to test confluence pulsation and pressure, and finally flows out of the test valve block through an oil return oil way (54) to return to an oil tank of a pressure oil source;
the oil way comprises a low-pressure oil way (44), a working output oil way (45), a high-pressure oil way (46), an oil supplementing loop (47), an output oil way one-way valve (48) and an oil supplementing loop one-way valve (49), wherein one end of the high-pressure oil way (46) is connected with a pressure oil source, the other end of the high-pressure oil way is communicated with an electromagnetic control valve P port (34), one end of the low-pressure oil way (44) is connected with a pressure oil source oil tank, the other end of the low-pressure oil way is communicated with an electromagnetic control valve T port (32), the working output oil way (45) is communicated with a flow oil cylinder oil outlet (3), the oil delivering loop one-way valve (48) is arranged, and the oil supplementing loop (47) is communicated with a flow oil cylinder oil inlet (43) and is provided with the oil supplementing loop one-way valve (49);
the test valve block further comprises a working output oil way interface (50), a throttle valve (53) and an oil return oil way (54), wherein the working output oil way interface (50) is connected with a working output oil way (45), hydraulic oil discharged by the servo valve control system is converged in the working output oil way (45) and enters the test valve block through the working output oil way interface (50), and flows out of the test valve block to flow back to an oil tank through the oil return oil way (54) sequentially through a pressure sensor (51) and a flow sensor (52), and the throttle valve (53) is arranged on an oil drain pipe of the test valve block; the number of the servo valve control systems is 8, and the servo valve control systems are installed on an oil path in a parallel connection mode.
2. The inner curve motor plunger assembly movement and output torque ripple testing device of claim 1, wherein: the piston sealing device is characterized in that a piston sealing ring (5) is arranged at the contact position of the piston (6) and the flow cylinder barrel (4), a sealing gasket (9) is arranged between the flow cylinder barrel (4) and the connecting end cover (10), and a push rod sealing ring (16) is arranged at the joint of the piston push rod (15) and the reciprocating cylinder end cover (17).
3. The inner curve motor plunger assembly movement and output torque ripple testing device of claim 1, wherein: a spring gland sealing ring (38) is arranged at the contact position of the spring gland (41) and the electromagnetic valve body (36).
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