Adjustable servo motor test loading system

Abstract

The application discloses a kind of adjustable servo motor test loading system, and relates to a kind of motor load testing device.The purpose is to overcome the problems that existing servo motor test loading device system cannot meet the needs of servo motor performance test at any time under different working conditions, comprising: oil tank is communicated with main oil pump, and main oil pump is communicated with the second inlet of reversing valve through low-pressure pressure reducing valve at the same time; it is communicated with the first inlet of reversing valve by high-pressure pressure reducing valve; the first outlet and the second outlet of reversing valve are respectively communicated with the inlet of rack and pinion oscillating hydraulic cylinder two ends; first side adjusting overflow valve and second side adjusting overflow valve are connected between reversing valve and rack and pinion oscillating hydraulic cylinder; the power output shaft of rack and pinion oscillating hydraulic cylinder is drivingly connected with the power input shaft of test servo motor through transmission unit; torque sensor is used to obtain the torque of the power output shaft of rack and pinion oscillating hydraulic cylinder as load data.

Description

Technical Field

[0001] This invention relates to a motor load testing device. Background Technology

[0002] Currently, domestically produced servo motors still lag behind foreign servo motors in performance. With the national push for the localization of key outsourced components and the trend of overcoming "bottleneck" technologies, the independent development of high-performance servo motors has significant research value. To better test the performance of domestically produced servo motors, load testing is necessary.

[0003] However, existing servo motor test loading devices cannot ensure that the load on the servo motor can meet the performance testing needs of the servo motor at any time under different working conditions, resulting in insufficient test data obtained from the performance testing of the servo motor. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem that existing servo motor test loading devices cannot meet the performance testing requirements of servo motors under different working conditions, and to provide an adjustable servo motor test loading system.

[0005] An adjustable servo motor test loading system of the present invention includes an oil supply device, an adjustment device, and a mechanical transmission device;

[0006] The oil supply system includes an oil tank, a main oil pump, a low-pressure pressure reducing valve, and a high-pressure pressure reducing valve;

[0007] The regulating device includes a reversing valve, a first-side regulating relief valve, a second-side regulating relief valve, and a rack and pinion swing hydraulic cylinder;

[0008] Mechanical transmission devices include transmission units and torque sensors;

[0009] The oil outlet of the oil tank is connected to the oil inlet of the main oil pump through a pipeline. The oil outlet of the main oil pump is also connected to the inlet of the low-pressure reducing valve and the inlet of the high-pressure reducing valve.

[0010] The outlet of the high-pressure reducing valve is connected to the first oil inlet of the reversing valve.

[0011] The outlet of the low-pressure reducing valve is connected to the second oil inlet of the reversing valve;

[0012] The first oil outlet of the reversing valve is connected to the oil inlet at one end of the rack and pinion swing hydraulic cylinder through a pipeline;

[0013] The second oil outlet of the reversing valve is connected to the oil inlet at the other end of the rack and pinion swing hydraulic cylinder via a pipeline;

[0014] The oil inlet of the first-side regulating overflow valve and the oil outlet of the second-side regulating overflow valve are both connected to the pipeline between the first oil outlet of the reversing valve and the oil inlet of one end of the rack and pinion swing hydraulic cylinder.

[0015] The oil outlet of the first-side regulating overflow valve and the oil inlet of the second-side regulating overflow valve are both connected to the pipeline between the second oil outlet of the reversing valve and the oil inlet at the other end of the rack and pinion swing hydraulic cylinder.

[0016] The power output shaft of the rack and pinion swing hydraulic cylinder is connected to the power input shaft of the test servo motor through a transmission unit;

[0017] The torque sensor is used to acquire the torque of the power output shaft of the rack and pinion oscillating hydraulic cylinder, and the torque is used as the load data of the servo motor.

[0018] The beneficial effects of this invention are:

[0019] This invention discloses an adjustable servo motor test loading system, primarily used for servo motor performance testing and research. Based on the theoretical foundations of hydraulic and mechanical transmission, it establishes the principle of a servo motor load loading test system. Utilizing a combination of a hydraulic system and a mechanical transmission mechanism, it enables load testing of servo motors under various operating conditions. The servo motor load can readily meet the performance testing requirements, providing crucial research data for servo motor performance research and offering significant research value for improving servo motor performance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the principle of an adjustable servo motor test loading system according to the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of an adjustable servo motor test loading system according to the present invention;

[0022] Figure 3 This is a schematic diagram of the oil supply device in an adjustable servo motor test loading system according to the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the adjustment device in an adjustable servo motor test loading system of the present invention (including its cooperation with the clutch release device);

[0024] Figure 5 This is a schematic diagram of the mechanical transmission device in an adjustable servo motor test loading system according to the present invention.

[0025] The attached diagram is labeled as follows: oil tank 1-1, main oil pump 1-2, low-pressure pressure reducing valve 1-3, high-pressure pressure reducing valve 1-4, safety check valve 1-5, magnetic filter 1-6, air filter 1-7, platinum resistance thermometer 1-8, level gauge 1-9, heater 1-10, drain port 1-11, shut-off valve 1-12, suction filter 1-13, spare oil port 1-14, sampling port 1-15, pressure gauge 1-16, outlet filter 1-17, outlet check valve 1-18, accumulator 1-19, safety drain valve 1-20, air cooler 1-21;

[0026] First side regulating overflow valve 2-1, second side regulating overflow valve 2-2, rack and pinion swing hydraulic cylinder 2-3, electromagnetic reversing valve 2-4-1, manual reversing valve 2-4-2, manual shut-off valve 2-5, pipeline tee 2-6, pipeline shut-off valve 2-7, pressure gauge 2-8, oil circuit shut-off valve 2-9;

[0027] Transmission unit 3-1, clutch release device 3-2, pressure switch 3-3, torque sensor 3-4, worm gear angle limit switch 3-5, coupling assembly 3-6, test servo motor 3-7. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention. Specific Implementation Method 1

[0032] An adjustable servo motor test loading system according to this embodiment includes an oil supply device, an adjustment device, and a mechanical transmission device.

[0033] The oil supply device includes an oil tank 1-1, a main oil pump 1-2, a low-pressure pressure reducing valve 1-3, and a high-pressure pressure reducing valve 1-4;

[0034] The regulating device includes a reversing valve, a first-side regulating overflow valve 2-1, a second-side regulating overflow valve 2-2, and a rack and pinion swing hydraulic cylinder 2-3;

[0035] The mechanical transmission device includes a transmission unit 3-1 and a torque sensor 3-4;

[0036] The oil outlet of oil tank 1-1 is connected to the oil inlet of main oil pump 1-2 through a pipeline. The oil outlet of main oil pump 1-2 is also connected to the inlet of low pressure reducing valve 1-3 and the inlet of high pressure reducing valve 1-4.

[0037] The outlet of the high pressure reducing valve 1-4 is connected to the first oil inlet of the reversing valve;

[0038] The outlet of the low-pressure reducing valve 1-3 is connected to the second oil inlet of the reversing valve;

[0039] The first oil outlet of the reversing valve is connected to the oil inlet of one end of the rack and pinion swing hydraulic cylinder 2-3 through a pipeline;

[0040] The second oil outlet of the reversing valve is connected to the oil inlet at the other end of the rack and pinion swing hydraulic cylinder 2-3 via a pipeline;

[0041] The oil inlet of the first side regulating overflow valve 2-1 and the oil outlet of the second side regulating overflow valve 2-2 are both connected to the pipeline between the first oil outlet of the reversing valve and the oil inlet of one end of the rack and pinion swing hydraulic cylinder 2-3.

[0042] The oil outlet of the first-side regulating overflow valve 2-1 and the oil inlet of the second-side regulating overflow valve 2-2 are both connected to the pipeline between the second oil outlet of the reversing valve and the oil inlet of the other end of the rack and pinion swing hydraulic cylinder 2-3.

[0043] The power output shaft of the rack and pinion swing hydraulic cylinder 2-3 is connected to the power input shaft of the test servo motor through the transmission unit 3-1;

[0044] Torque sensor 3-4 is used to acquire the torque of the power output shaft of rack and pinion swing hydraulic cylinder 2-3, and the torque is used as the load data of servo motor.

[0045] Specifically, this embodiment consists of an oil supply device 1, an adjustment device 2, and a mechanical transmission device 3.

[0046] Oil supply unit 1 is responsible for supplying oil to the entire system. After the main oil pump 1-2 starts, it draws oil from the oil tank 1-1 through the suction filter 1-13, then through the outlet filter 1-17, and finally through the high-pressure reducing valve 1-4 and the low-pressure reducing valve 1-3 before sending it into the system. The high-pressure reducing valve 1-4 can adjust the pressure to the range of 4-16 MPa, and the low-pressure reducing valve 1-3 can adjust the pressure to 2 MPa. Accumulator 1-19 can reduce pressure pulsation and frequency vibration at the pump outlet.

[0047] After receiving oil from the oil supply device, the regulating device 2 sends 14MPa pressure oil through pipeline tee 2-6 to the manual directional valve 2-4-2 and the solenoid directional valve 2-4-1 respectively, realizing the switching between electric and manual control. The high-pressure control oil enters the A port (oil inlet at one end) and B port (oil inlet at the other end) on both sides of the rack and pinion swing hydraulic cylinder 2-3 to form the load pressure. By adjusting the first side relief valve 2-1 and the second side relief valve 2-2, the servo motor can be adjusted at any time to meet the load changes under different working conditions, whether rotating forward or backward.

[0048] Mechanical transmission device 3 connects the test servo motor to the adjustment device, achieving the test load condition of the test servo motor through mechanical transmission. During the test, torque sensors 3-4 display and record the load data changes. Specific Implementation Method Two

[0050] This embodiment is a further explanation of embodiment one. In this embodiment, the reversing valve includes a solenoid reversing valve 2-4-1 and a manual reversing valve 2-4-2.

[0051] The electromagnetic directional valve 2-4-1 and the manual directional valve 2-4-2 are connected in parallel.

[0052] The other technical features of this embodiment are exactly the same as those of Embodiment 1.

[0053] Specifically, the manual directional valve 2-4-2 and the solenoid directional valve 2-4-1 respectively enable the switching between electric control and manual control, preventing the risk of the system being unable to be tested after the solenoid valve fails. Specific Implementation Method 3

[0055] This embodiment is a further explanation of embodiment one or two. In this embodiment, the mechanical transmission device further includes a clutch release device 3-2; the adjustment device further includes a manual shut-off valve 2-5.

[0056] The oil inlet of manual shut-off valve 2-5 is connected to the outlet of low-pressure reducing valve 1-3;

[0057] The first oil outlet of the manual shut-off valve 2-5 is connected to the second oil inlet of the directional valve, and the second oil outlet of the manual shut-off valve 2-5 is connected to the oil inlet of the clutch release device 3-2.

[0058] The clutch release device 3-2 is used to control the clutch of the transmission unit 3-1.

[0059] The other technical features of this embodiment are exactly the same as those of Embodiment 1 or 2.

[0060] Specifically, after the regulating device 2 receives oil from the oil supply device, another path, controlled by the manual shut-off valve 2-5, can send 2MPa pressure oil to the clutch release device 3-2 of the mechanical transmission device, which can control the engagement and disengagement of the ZC1 type worm gear transmission unit 3-1, ensuring the start-up and shutdown control of the entire system in case of emergencies. Specific Implementation Method Four

[0062] This embodiment is a further explanation of embodiment three. In this embodiment, the mechanical transmission device 3 also includes a pressure switch 3-3.

[0063] Pressure switch 3-3 is used to detect the on / off state of the clutch release device 3-2.

[0064] The other technical features of this embodiment are exactly the same as those of Embodiment 3.

[0065] Specifically, pressure switch 3-3 is used to detect the oil supply status of clutch tripping device 3-2 and provide a signal to the motor control box. Detailed Implementation Method Five

[0067] This embodiment is a further explanation of embodiment one, two or four. In this embodiment, the oil supply device also includes safety check valves 1-5.

[0068] The inlet of safety check valve 1-5 is connected to the outlet of main oil pump 1-2, and the outlet of safety check valve 1-5 is simultaneously connected to the inlet of low-pressure pressure reducing valve 1-3 and the inlet of high-pressure pressure reducing valve 1-4.

[0069] The other technical features of this embodiment are exactly the same as those of embodiments one, two, and four.

[0070] Specifically, when the system pressure exceeds 18MPa, the oil can be unloaded and returned to the oil tank by the safety check valve 1-5, which can play the role of overpressure protection. Specific Implementation Method Six

[0072] This embodiment is a further explanation of embodiment five. In this embodiment, the transmission device 3-1 is a worm gear transmission device.

[0073] The other technical features of this embodiment are exactly the same as those of Embodiment 5.

[0074] Specifically, the test servo motor is connected to the worm of the ZC1 type worm gear transmission unit 3-1. The worm drives the gear to rotate and is connected to one end of the coupling assembly 3-6. The other end of the coupling assembly 3-6 is connected to the rack and pinion swing hydraulic cylinder 2-3 to complete the load loading test required after the entire servo motor rotates. Detailed Implementation Method Seven

[0076] This embodiment is a further explanation of embodiment six. In this embodiment, the mechanical transmission device 3 also includes a worm gear angle limit switch 3-5.

[0077] Worm gear angle limit switch 3-5 is used to obtain the worm gear rotation stroke during transmission.

[0078] The other technical features of this embodiment are exactly the same as those of Embodiment Six.

[0079] Specifically, the worm gear angle limit switch 3-5 is responsible for providing feedback on the turbine rotation stroke during transmission. When the worm gear reaches its maximum allowable angle, the protrusion keeps the worm gear angle limit switch 3-5 in the triggered state, providing a stroke signal that can be used for protection such as power failure and machine shutdown. The function of the worm gear angle limit switch 3-5 is to provide real-time feedback on the turbine's rotation, ensuring it operates within the allowable range and preventing it from exceeding the safe stroke. Specific implementation method eight.

[0080] This embodiment is a further explanation of embodiment one, two, four, six or seven. In this embodiment, the pressure adjustment value of the high pressure reducing valve 1-4 is 4 to 16 MPa.

[0081] The pressure adjustment value of low-pressure pressure reducing valves 1-3 is 2MPa.

[0082] The other technical features of this embodiment are exactly the same as those of embodiments one, two, four, six or seven.

[0083] In summary, the adjustable servo motor test loading system of the present invention utilizes a worm gear transmission device and a rack and pinion hydraulic cylinder connected by a coupling to form a servo motor load transmission structure. An oil supply device supplies oil to the rack and pinion hydraulic cylinder, and an adjustable hydraulic load system is built to achieve load pressure adjustment, thus forming a servo motor loading test system and providing a variable load loading test platform for servo motor performance testing.

[0084] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other embodiments.

Claims

1. An adjustable servo motor test loading system, characterized in that, It includes an oil supply device (1), an adjustment device (2), and a mechanical transmission device (3); The oil supply device (1) includes an oil tank (1-1), a main oil pump (1-2), a low-pressure pressure reducing valve (1-3), and a high-pressure pressure reducing valve (1-4); The regulating device (2) includes a reversing valve, a first-side regulating overflow valve (2-1), a second-side regulating overflow valve (2-2), and a rack and pinion swing hydraulic cylinder (2-3); The mechanical transmission device (3) includes a transmission unit (3-1) and a torque sensor (3-4); The oil outlet of the oil tank (1-1) is connected to the oil inlet of the main oil pump (1-2) through a pipeline. The oil outlet of the main oil pump (1-2) is simultaneously connected to the inlet of the low-pressure reducing valve (1-3) and the inlet of the high-pressure reducing valve (1-4). The outlet of the high-pressure reducing valve (1-4) is connected to the first oil inlet of the reversing valve; The outlet of the low-pressure reducing valve (1-3) is connected to the second oil inlet of the reversing valve; The first oil outlet of the reversing valve is connected to the oil inlet of one end of the rack and pinion swing hydraulic cylinder (2-3) through a pipeline; The second oil outlet of the reversing valve is connected to the oil inlet at the other end of the rack and pinion swing hydraulic cylinder (2-3) via a pipeline; The oil inlet of the first side regulating overflow valve (2-1) and the oil outlet of the second side regulating overflow valve (2-2) are both connected to the pipeline between the first oil outlet of the reversing valve and the oil inlet of one end of the rack and pinion swing hydraulic cylinder (2-3). The oil outlet of the first side regulating overflow valve (2-1) and the oil inlet of the second side regulating overflow valve (2-2) are both connected to the pipeline between the second oil outlet of the reversing valve and the oil inlet of the other end of the rack and pinion swing hydraulic cylinder (2-3); The power output shaft of the rack and pinion swing hydraulic cylinder (2-3) is connected to the power input shaft of the test servo motor through the transmission unit (3-1); The torque sensor (3-4) is used to acquire the torque of the power output shaft of the rack and pinion swing hydraulic cylinder (2-3), and the torque is used as the load data of the servo motor.

2. The adjustable servo motor test loading system according to claim 1, characterized in that, The directional control valves include a solenoid directional control valve (2-4-1) and a manual directional control valve (2-4-2); The electromagnetic reversing valve (2-4-1) and the manual reversing valve (2-4-2) are connected in parallel.

3. An adjustable servo motor test loading system according to claim 1 or 2, characterized in that, The mechanical transmission device (3) further includes a clutch release device (3-2); the adjustment device further includes a manual shut-off valve (2-5); The oil inlet of the manual shut-off valve (2-5) is connected to the outlet of the low-pressure reducing valve (1-3); The first oil outlet of the manual shut-off valve (2-5) is connected to the second oil inlet of the directional valve, and the second oil outlet of the manual shut-off valve (2-5) is connected to the oil inlet of the clutch release device (3-2). The clutch release device (3-2) is used to control the clutch engagement and disengagement of the transmission unit (3-1).

4. The adjustable servo motor test loading system according to claim 3, characterized in that, The mechanical transmission device (3) also includes a pressure switch (3-3); The pressure switch (3-3) is used to detect the on / off state of the clutch trip device (3-2).

5. An adjustable servo motor test loading system according to claim 1, 2, or 4, characterized in that, The oil supply device also includes a safety check valve (1-5); The inlet of the safety check valve (1-5) is connected to the outlet of the main oil pump (1-2), and the outlet of the safety check valve (1-5) is simultaneously connected to the inlet of the low-pressure reducing valve (1-3) and the inlet of the high-pressure reducing valve (1-4).

6. The adjustable servo motor test loading system according to claim 5, characterized in that, The transmission unit (3-1) is a worm gear transmission device.

7. The adjustable servo motor test loading system according to claim 6, characterized in that, The mechanical transmission device (3) also includes a worm gear angle limit switch (3-5); The worm gear rotation angle limit switch (3-5) is used to obtain the worm gear rotation stroke during transmission.

8. An adjustable servo motor test loading system according to claim 1, 2, 4, 6 or 7, characterized in that, The pressure adjustment value of the high-pressure pressure reducing valve (1-4) is 4-16 MPa; The pressure adjustment value of the low-pressure reducing valve (1-3) is 2MPa.

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