CN214465265U - Loading test system of hydraulic motor - Google Patents
Loading test system of hydraulic motor Download PDFInfo
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- CN214465265U CN214465265U CN202023203315.6U CN202023203315U CN214465265U CN 214465265 U CN214465265 U CN 214465265U CN 202023203315 U CN202023203315 U CN 202023203315U CN 214465265 U CN214465265 U CN 214465265U
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Abstract
The utility model discloses a hydraulic motor's load test system, including test platform, industrial computer and PLC controller, test platform's upper portion is fixed with the bedplate, and upper portion one side of bedplate is fixed with the quick change support frame, and one side of quick change support frame is installed and is surveyed hydraulic motor, and the output shaft and the quick change support frame of being surveyed hydraulic motor rotate to be connected; the upper portion of the test platform is provided with a support close to the quick-change support frame, the upper portion of the support is provided with a torque and rotating speed sensor, and one end of the torque and rotating speed sensor is connected with an output shaft of the tested hydraulic motor through a first coupler. The utility model has simple structure, different servo motors and tested hydraulic motors can be selected according to the actual test requirements, and the applicability is increased; the loading control precision is high, the loading response is fast, the low-speed performance is good, and the problem of stable loading of 100-channel 500r/m in the low-speed area which cannot be realized by hydraulic loading is solved.
Description
Technical Field
The utility model relates to a hydraulic motor tests technical field, specifically is a hydraulic motor's loading test system.
Background
The performance test of the hydraulic motor generally includes testing the flow rate, the inlet and outlet pressure difference, the output torque, the output rotating speed and the like of the hydraulic motor under a certain load when the hydraulic motor is delivered from a factory or maintained. The conventional loading method comprises the following steps:
1, a mechanical loading method: the method comprises the steps of friction dynamometer loading, torsion spring loading, inertia disc loading and the like, is simple and feasible, is not suitable for the conditions of high power and low speed, and is not suitable for the hydraulic motor test for the hydraulic transmission of engineering machinery;
2, a hydraulic loading method: one motor with the same model is selected as an accompanying test motor, a load hydraulic system is built, the accompanying test motor is driven by a hydraulic bridge type loop to serve as a load, the structure is complex, the maintenance workload is large, the fluctuation of the rotating speed below 500r/m is large, and the test requirement cannot be met;
3, back pressure loading method: the method is not to directly add load torque on a hydraulic motor shaft, but to connect a throttle valve (or an overflow valve) in series on an oil return path, when a hydraulic oil source of a test system supplies oil to a tested hydraulic motor, the opening degree of the throttle opening is reduced, the back pressure of the motor is increased, and the pressure of an oil inlet of the motor is also increased. Taking a plunger motor as an example, because the pressure difference of an inlet and an outlet is very small, the internal leakage of the hydraulic motor is very small, and under the actual working condition of the hydraulic motor, only the part of a plunger cavity communicated with the inlet is high-pressure, the external leakage needs to be increased by about 1 time, the volumetric efficiency of the hydraulic motor can be roughly tested by the method, because all the plunger cavities are in a high-pressure state, the stress of motor parts is increased by the method, the load of the stress parts in the hydraulic motor is also increased by about 1 time, for example, a connecting screw between a shell and an end cover can be in an overload state, and the method is not very safe;
the method can not meet the load requirement of the performance test of the hydraulic motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of overcoming the existing defects, and provides a loading test system of a hydraulic motor, which has a simple structure, can select different servo motors and tested hydraulic motors according to the actual test requirements, and increases the applicability; the loading control precision is high, the loading response is fast, the low-speed performance is good, the problem of stable loading of 100-channel 500r/m in the low-speed area which cannot be realized by hydraulic loading is solved, and the problem in the background technology can be effectively solved.
In order to achieve the above object, the utility model provides a following technical scheme: a loading test system of a hydraulic motor comprises a test platform, an industrial personal computer and a PLC (programmable logic controller), wherein a seat plate is fixed at the upper part of the test platform, a quick-change support frame is fixed at one side of the upper part of the seat plate, a tested hydraulic motor is installed at one side of the quick-change support frame, and an output shaft of the tested hydraulic motor is rotationally connected with the quick-change support frame; a bracket is arranged on the upper part of the test platform, close to the quick-change support frame, a torque and rotating speed sensor is mounted on the upper part of the bracket, and one end of the torque and rotating speed sensor is connected with an output shaft of the tested hydraulic motor through a first coupler; the other side of the upper part of the test platform is fixedly provided with a servo motor, and an output shaft of the servo motor is connected with the other end of the torque and rotation speed sensor through a second coupler; the servo motor is driven by a servo driver.
Preferably, the torque rotating speed sensor measures the actual rotating speed and torque value of the measured hydraulic motor, and transmits data to the PLC, and the PLC transmits signals of the rotating speed and torque value to the industrial personal computer for collection and display.
Preferably, the industrial personal computer sends an instruction to the PLC, and the PLC communicates with the servo driver through the Ethernet to control the output torque and start and stop of the servo motor.
Preferably, the bracket is one of an electric bracket or a hydraulic bracket, and the height of the torque and rotation speed sensor can be adjusted.
Preferably, the servo motor, the bracket and the quick-change support frame are all in threaded connection with the seat plate through bolts.
Compared with the prior art, the beneficial effects of the utility model are that: the loading test system of the hydraulic motor controls the output torque of the servo motor by adopting the servo motor, the servo driver and the PLC, so as to realize loading on the hydraulic motor; the structure is simple, maintenance is almost not needed, the low speed can reach about 100r/m, the speed range is wide, the load range is large, different servo motors and tested hydraulic motors can be selected according to actual test requirements, and the applicability is improved; the loading torque can be set by a computer, the loading control precision is high and can reach 0.1NM, the loading response is fast, the low-speed performance is good, and the problem of stable loading of 100-channel 500r/m in a low-speed area, which cannot be realized by hydraulic loading, is solved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the control principle of the present invention.
In the figure: the test system comprises a hydraulic motor to be tested 1, a first coupler 2, a torque and speed sensor 3, a second coupler 4, a servo motor 5, a support 6, a quick-change support frame 7, a test platform 8, an industrial personal computer 9, a PLC 10 and a servo driver 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: a loading test system of a hydraulic motor comprises a test platform 8, an industrial personal computer 9 and a PLC (programmable logic controller) 10, wherein a seat plate is fixed at the upper part of the test platform 8, a quick-change support frame 7 is fixed at one side of the upper part of the seat plate, a tested hydraulic motor 1 is installed at one side of the quick-change support frame 7, the quick-change support frame 7 can be quickly disassembled, different tested hydraulic motors can be conveniently installed, and an output shaft of the tested hydraulic motor 1 is rotatably connected with the quick-change support frame 7; a bracket 6 is arranged on the upper part of the test platform 8 close to the quick-change support frame 7, a torque and rotating speed sensor 3 is mounted on the upper part of the bracket 6, and one end of the torque and rotating speed sensor 3 is connected with an output shaft of the tested hydraulic motor 1 through a first coupler 2; the other side of the upper part of the test platform 8 is fixed with a servo motor 5, and an output shaft of the servo motor 5 is connected with the other end of the torque and rotation speed sensor 3 through a second coupler 4; the servo motor 5 is driven by a servo driver 11;
it should be noted that the torque rotation speed sensor 3 measures the actual rotation speed and torque value of the measured hydraulic motor 1, and transmits data to the PLC controller 10, and the PLC controller 10 transmits the rotation speed and torque value signals to the industrial personal computer 9 for collection and display; the industrial personal computer 9 sends an instruction to the PLC 10, and the PLC 10 is communicated with the servo driver 11 through the Ethernet to control the output torque and start and stop of the servo motor 5; by adopting the servo motor 5, the servo driver 11 and the PLC 10, the servo motor 5 works in a torque mode, and the servo motor 5 is controlled to output torque by adopting a (DTC) direct torque loading mode, so that the loading of the tested hydraulic motor 1 is realized;
because the servo motor 5 is used as a driving source, the loading characteristic of the servo motor is a constant torque characteristic from zero rotating speed to rated rotating speed, and the constant power characteristic from the rated rotating speed to the highest rotating speed completely conforms to the load characteristic of power machinery;
in addition, the bracket 6 is one of an electric bracket or a hydraulic bracket, the height of the torque and rotation speed sensor 3 can be adjusted, and when different servo motors are selected as driving sources, the torque and rotation speed sensor 3 can adapt to different servo motors and is convenient to connect;
in order to facilitate disassembly, the servo motor 5, the bracket 6 and the quick-change support frame 7 are all in threaded connection with the seat plate through bolts.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a hydraulic motor's loading test system, includes test platform (8), industrial computer (9) and PLC controller (10), its characterized in that: a seat plate is fixed on the upper part of the test platform (8), a quick-change support frame (7) is fixed on one side of the upper part of the seat plate, a tested hydraulic motor (1) is installed on one side of the quick-change support frame (7), and an output shaft of the tested hydraulic motor (1) is rotationally connected with the quick-change support frame (7); a bracket (6) is arranged on the upper part of the test platform (8) close to the quick-change support frame (7), a torque and rotating speed sensor (3) is mounted on the upper part of the bracket (6), and one end of the torque and rotating speed sensor (3) is connected with an output shaft of the tested hydraulic motor (1) through a first coupling (2); the other side of the upper part of the test platform (8) is fixed with a servo motor (5), and an output shaft of the servo motor (5) is connected with the other end of the torque and rotation speed sensor (3) through a second coupling (4); the servo motor (5) is driven by a servo driver (11).
2. The load testing system of a hydraulic motor according to claim 1, wherein: the torque rotating speed sensor (3) measures the actual rotating speed and torque value of the measured hydraulic motor (1), data are transmitted to the PLC (programmable logic controller) controller (10), and the PLC controller (10) transmits rotating speed and torque value signals to the industrial personal computer (9) for collection and display.
3. The load testing system of a hydraulic motor according to claim 1, wherein: the industrial personal computer (9) sends an instruction to the PLC controller (10), and the PLC controller (10) is communicated with the servo driver (11) through the Ethernet to control the output torque and start and stop of the servo motor (5).
4. The load testing system of a hydraulic motor according to claim 1, wherein: the support (6) is one of an electric support or a hydraulic support, and the height of the torque and rotation speed sensor (3) can be adjusted.
5. The load testing system of a hydraulic motor according to claim 1, wherein: the servo motor (5), the bracket (6) and the quick-change support frame (7) are all in threaded connection with the seat plate through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023203315.6U CN214465265U (en) | 2020-12-24 | 2020-12-24 | Loading test system of hydraulic motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023203315.6U CN214465265U (en) | 2020-12-24 | 2020-12-24 | Loading test system of hydraulic motor |
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| CN214465265U true CN214465265U (en) | 2021-10-22 |
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| CN202023203315.6U Active CN214465265U (en) | 2020-12-24 | 2020-12-24 | Loading test system of hydraulic motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116164011A (en) * | 2022-12-28 | 2023-05-26 | 宁波市产品食品质量检验研究院(宁波市纤维检验所) | Full-load and overload test bed for low-speed hydraulic motor simulating heavy-load working condition |
| CN116398504A (en) * | 2023-04-06 | 2023-07-07 | 国家智能制造装备产品质量监督检验中心(浙江) | Test platform for fluctuation of outlet pressure of hydraulic motor |
-
2020
- 2020-12-24 CN CN202023203315.6U patent/CN214465265U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116164011A (en) * | 2022-12-28 | 2023-05-26 | 宁波市产品食品质量检验研究院(宁波市纤维检验所) | Full-load and overload test bed for low-speed hydraulic motor simulating heavy-load working condition |
| CN116164011B (en) * | 2022-12-28 | 2023-09-05 | 宁波市产品食品质量检验研究院(宁波市纤维检验所) | Full-load and overload test bed for low-speed hydraulic motor simulating heavy-load working condition |
| CN116398504A (en) * | 2023-04-06 | 2023-07-07 | 国家智能制造装备产品质量监督检验中心(浙江) | Test platform for fluctuation of outlet pressure of hydraulic motor |
| CN116398504B (en) * | 2023-04-06 | 2023-10-31 | 国家智能制造装备产品质量监督检验中心(浙江) | Test platform for fluctuation of outlet pressure of hydraulic motor |
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