CN114087258B - Hydraulic motor low-speed loading test device and method based on energy recycling - Google Patents
Hydraulic motor low-speed loading test device and method based on energy recycling Download PDFInfo
- Publication number
- CN114087258B CN114087258B CN202111367675.6A CN202111367675A CN114087258B CN 114087258 B CN114087258 B CN 114087258B CN 202111367675 A CN202111367675 A CN 202111367675A CN 114087258 B CN114087258 B CN 114087258B
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- motor
- permanent magnet
- magnet synchronous
- hydraulic
- hydraulic motor
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 48
- 239000007858 starting material Substances 0.000 claims abstract description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a hydraulic motor low-speed loading test device and method based on energy recycling, wherein the device comprises a soft starter (1), a driving motor (2), a hydraulic pump (3) and a proportional flow valve (4) which are sequentially connected, and the proportional flow valve (4) is connected with a hydraulic motor (5) to be tested; the hydraulic motor testing device further comprises a rotating speed torque meter (6) and a permanent magnet synchronous motor (7) which are connected with the hydraulic motor (5) to be tested, wherein the permanent magnet synchronous motor (7) is connected with a four-quadrant frequency converter (9), and the four-quadrant frequency converter (9) is connected with a power grid. The invention has the characteristic of being capable of effectively and stably loading the hydraulic motor to be tested.
Description
Technical Field
The invention relates to a hydraulic motor low-speed loading test device, in particular to a hydraulic motor low-speed loading test device and method based on energy recycling.
Background
As is well known, in the development process of a hydraulic motor, a verification test of the hydraulic motor is required, and a traditional method is to drive a hydraulic pump by using a motor, drive the hydraulic motor to be detected by the hydraulic pump, drive a load by the hydraulic motor, and then perform various loading tests on the hydraulic motor. Currently, the load applied to the hydraulic motor to be tested is typically an oil pump, and the loading of the hydraulic motor is achieved by proportional loading of the oil pump. The method can meet the type test and the performance test of the hydraulic motor in the conventional test. However, in the research and development verification test, the motor needs to be loaded stably at a low speed, and the hydraulic pump cannot be loaded effectively due to poor stability at a low speed, so that the normal running of the test can be affected. Therefore, the prior art has the problem that the hydraulic motor to be tested cannot be effectively and stably loaded.
Disclosure of Invention
The invention aims to provide a hydraulic motor low-speed loading test device and method based on energy recycling. The invention has the characteristic of being capable of effectively and stably loading the hydraulic motor to be tested.
The technical scheme of the invention is as follows: the hydraulic motor low-speed loading test device based on energy recycling comprises a soft starter, a driving motor, a hydraulic pump and a proportional flow valve which are sequentially connected, wherein the proportional flow valve is connected with a hydraulic motor to be tested; the hydraulic motor to be tested is connected with a power grid through a power supply, and the hydraulic motor to be tested is connected with a rotating speed torque meter and a permanent magnet synchronous motor.
In the hydraulic motor low-speed loading test device based on energy recycling, a high-frequency reactor is arranged between the permanent magnet synchronous motor and the four-quadrant frequency converter.
In the hydraulic motor low-speed loading test device based on energy recycling, the permanent magnet synchronous motor is further provided with a sin/cos encoder.
According to the hydraulic motor low-speed loading test method based on energy recycling, a driving motor is utilized to drive a hydraulic pump to provide a hydraulic source, hydraulic oil is regulated to flow entering a hydraulic motor to be tested through a proportional flow valve, the hydraulic motor is connected with a permanent magnet synchronous motor through a rotating speed torque meter, and electric energy generated by the permanent magnet synchronous motor in a motor mode is fed back to a power grid through a four-quadrant frequency converter; the magnetic pole position of the permanent magnet synchronous motor is sensed through the four-quadrant frequency converter so as to control the low-speed stability of the driving motor.
In the hydraulic motor low-speed loading test method based on energy recycling, the four-quadrant frequency conversion adopts a speed control torque limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor.
In the hydraulic motor low-speed loading test method based on energy recycling, the rotating speed of the permanent magnet synchronous motor is set, the torque of the driving motor is slowly adjusted, the driving motor is controlled to be larger than the torque of the hydraulic motor to be tested, and stable loading of the hydraulic motor to be tested below 5rpm is achieved.
In the hydraulic motor low-speed loading test method based on energy recycling, the rotating speed of the permanent magnet synchronous motor is 5rpm.
Compared with the prior art, the hydraulic pump driven by the driving motor and the tested hydraulic motor driven by the hydraulic pump are adopted; the permanent magnet synchronous motor driven by the tested hydraulic motor is connected with the four-quadrant frequency converter, the four-quadrant frequency converter can feed back the electric energy generated by the tested hydraulic motor driving the permanent magnet synchronous motor to the power grid, and the electric energy can be recovered while the loading of the motor is realized, so that the test cost is saved. The invention changes the load driven by the tested hydraulic pump into the permanent magnet synchronous motor, at the moment, the permanent magnet synchronous motor works in a generator mode, because the permanent magnet synchronous motor does not need exciting windings, the rotor and the stator magnetic field synchronously run during operation, the power factor is close to 1, the low-speed stability is good, the loading moment is stable, meanwhile, the moment of inertia of the permanent magnet synchronous motor is small, the high-speed permanent magnet synchronous motor is adopted for direct loading, and the stable loading of the motor rotating speed from 0 to 15000RPM can be realized without a speed increasing box; the experimental device is simplified, the power consumption of the tested hydraulic pump is prevented from being changed into heat energy, and the experimental cost is saved. In summary, the invention has the characteristic of being capable of effectively and stably loading the hydraulic motor to be tested.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The marks in the drawings are: the device comprises a 1-soft starter, a 2-driving motor, a 3-hydraulic pump, a 4-proportional flow valve, a 5-hydraulic motor to be tested, a 6-rotating speed torque meter, a 7-permanent magnet synchronous motor, an 8-high frequency reactor, a 9-four-quadrant frequency converter and a 10-sin/cos encoder.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The hydraulic motor low-speed loading test device based on energy recycling is shown in fig. 1, and comprises a soft starter 1, a driving motor 2, a hydraulic pump 3 and a proportional flow valve 4 which are sequentially connected, wherein the proportional flow valve 4 is connected with a hydraulic motor 5 to be tested; the hydraulic motor to be tested is characterized by further comprising a rotating speed torque meter 6 and a permanent magnet synchronous motor 7 which are connected with the hydraulic motor to be tested 5, wherein the permanent magnet synchronous motor 7 is connected with a four-quadrant frequency converter 9, and the four-quadrant frequency converter 9 is connected with a power grid.
A high-frequency reactor 8 is arranged between the permanent magnet synchronous motor 7 and the four-quadrant frequency converter 9.
The permanent magnet synchronous motor 7 is also provided with a sin/cos encoder 10.
According to the hydraulic motor low-speed loading test method based on energy recycling, a driving motor is utilized to drive a hydraulic pump to provide a hydraulic source, hydraulic oil is regulated to flow entering a hydraulic motor to be tested through a proportional flow valve, the hydraulic motor is connected with a permanent magnet synchronous motor through a rotating speed torque meter, and electric energy generated by the permanent magnet synchronous motor in a motor mode is fed back to a power grid through a four-quadrant frequency converter; the magnetic pole position of the permanent magnet synchronous motor is sensed through the four-quadrant frequency converter so as to control the low-speed stability of the driving motor.
The four-quadrant frequency conversion adopts a speed control torque limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor.
And slowly adjusting the torque of the driving motor by setting the rotating speed of the permanent magnet synchronous motor, controlling the driving motor to be larger than the torque of the hydraulic motor to be tested, and realizing the stable loading of the hydraulic motor to be tested below 5 rpm.
The rotational speed of the permanent magnet synchronous motor was 5rpm.
After the soft starter 1 starts the driving motor 2, the driving motor 2 drives the hydraulic pump 3 to provide a hydraulic source for the system, the flow of hydraulic oil entering the hydraulic motor 5 is regulated through the proportional flow valve 4, the hydraulic motor 5 is connected with the permanent magnet synchronous motor 7 through the rotating speed torque instrument 6, and the permanent magnet synchronous motor 7 works in a motor mode to generate electric energy to feed back to a power grid through the four-quadrant frequency converter 9.
Since the permanent magnet synchronous motor generates reverse electromotive force when running at high speed, a high-frequency reactor 8 is additionally arranged between the permanent magnet synchronous motor 7 and the four-quadrant frequency converter 9.
The sin/cos encoder 10 is arranged on the permanent magnet synchronous motor 7, so that the motor operation precision is improved, and meanwhile, the four-quadrant frequency converter 9 can sense the magnetic pole position of the permanent magnet synchronous motor 7 to control the low-speed stability of the motor.
The device adopts a speed control torque amplitude limiting mode, the control quantity of the frequency converter is speed and rotating speed, when a motor loading test is carried out, a speed given value is zero, a given torque signal is needed to be loaded, and the method does not need to judge the motor rotation direction.
The device realizes low-speed loading and realizes stable loading when the motor rotating speed is 5rpm, the lowest stable rotating speed of the hydraulic motor is about 150rpm due to the characteristics of the hydraulic motor, the oscillation of the hydraulic motor is aggravated after the lowest stable rotating speed is lower than 150rpm, and the motor speed is instantaneously changed into 0 after severe oscillation occurs and the hydraulic motor is loaded. In order to solve the problem, the low-speed stability of the permanent magnet synchronous motor is fully utilized, the rotating speed of the permanent magnet synchronous motor is set to be 5rpm at the moment, the rotating speed of the hydraulic motor is set to be 150rpm, the torque limiting value of the frequency converter is slowly set, the rotating speed of the motor is stabilized by the motor when the limiting value is larger than the torque of the hydraulic motor, and finally the motor is stabilized at 5rpm, and the torque of the motor is also stabilized at the moment, so that the low-speed stable loading of the motor is realized. The special low-speed stability of the permanent magnet synchronous motor, the encoder and the frequency converter is utilized to act as a stabilizer, so that the motor realizes ultra-low-speed loading. The device is successfully applied to a low-speed stable loading test of a hydraulic motor of a certain military product.
Claims (1)
1. The hydraulic motor low-speed loading test method based on energy recycling is characterized by comprising the following steps of: the driving motor is used for driving the hydraulic pump to provide hydraulic oil, the hydraulic oil is used for adjusting the flow rate of the hydraulic oil entering the hydraulic motor to be tested through the proportional flow valve, the hydraulic motor is connected with the permanent magnet synchronous motor through the rotating speed torque meter, and the electric energy generated by the permanent magnet synchronous motor in the motor mode is fed back to the power grid through the four-quadrant frequency converter; sensing the magnetic pole position of the permanent magnet synchronous motor through the four-quadrant frequency converter so as to control the low-speed stability of the driving motor;
the method is carried out by adopting a hydraulic motor low-speed loading test device based on energy recycling, and comprises a soft starter (1), a driving motor (2), a hydraulic pump (3) and a proportional flow valve (4) which are sequentially connected, wherein the proportional flow valve (4) is connected with a hydraulic motor (5) to be tested; the device also comprises a rotating speed torque meter (6) and a permanent magnet synchronous motor (7) which are connected with the hydraulic motor (5) to be tested, wherein the permanent magnet synchronous motor (7) is connected with a four-quadrant frequency converter (9), and the four-quadrant frequency converter (9) is connected with a power grid;
A high-frequency reactor (8) is arranged between the permanent magnet synchronous motor (7) and the four-quadrant frequency converter (9); a sin/cos encoder (10) is also arranged on the permanent magnet synchronous motor (7); the four-quadrant frequency converter adopts a speed control torque limiting mode to respectively control the rotating speed and the torque of the permanent magnet synchronous motor; the torque of the driving motor is slowly regulated by giving the rotating speed of the permanent magnet synchronous motor, and the driving motor is controlled to be larger than the torque of the hydraulic motor to be tested, so that the stable loading of the hydraulic motor to be tested below 5rpm is realized; the rotational speed of the permanent magnet synchronous motor was 5rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367675.6A CN114087258B (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111367675.6A CN114087258B (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
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| Publication Number | Publication Date |
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| CN114087258A CN114087258A (en) | 2022-02-25 |
| CN114087258B true CN114087258B (en) | 2024-10-01 |
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| CN202111367675.6A Active CN114087258B (en) | 2021-11-18 | 2021-11-18 | Hydraulic motor low-speed loading test device and method based on energy recycling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115111228B (en) * | 2022-07-20 | 2025-03-18 | 北京天玛智控科技股份有限公司 | A hydraulic pump loading test system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291688A (en) * | 2013-06-08 | 2013-09-11 | 浙江大学 | Hydraulic pump motor test bed with energy recovery device and using method thereof |
| CN207301281U (en) * | 2017-08-18 | 2018-05-01 | 山东欧瑞安电气有限公司 | A kind of high-power low-speed permanent-magnet synchronous motor is to holding in the palm test platform |
| CN216433528U (en) * | 2021-11-18 | 2022-05-03 | 力源液压系统（贵阳）有限公司 | Low-speed loading test device for hydraulic motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1868288B1 (en) * | 2006-06-15 | 2009-10-14 | ABB Oy | Method and system in connection with permanent magnet synchronous machines |
| CN103016452A (en) * | 2012-12-14 | 2013-04-03 | 中航力源液压股份有限公司 | Method and device for recovering and using energy produced in hydraulic motor load test |
| CN213598283U (en) * | 2020-07-30 | 2021-07-02 | 九江七所精密机电科技有限公司 | Energy feedback type electric loading tester |
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2021
- 2021-11-18 CN CN202111367675.6A patent/CN114087258B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291688A (en) * | 2013-06-08 | 2013-09-11 | 浙江大学 | Hydraulic pump motor test bed with energy recovery device and using method thereof |
| CN207301281U (en) * | 2017-08-18 | 2018-05-01 | 山东欧瑞安电气有限公司 | A kind of high-power low-speed permanent-magnet synchronous motor is to holding in the palm test platform |
| CN216433528U (en) * | 2021-11-18 | 2022-05-03 | 力源液压系统（贵阳）有限公司 | Low-speed loading test device for hydraulic motor |
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| CN114087258A (en) | 2022-02-25 |
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Address after: 550018 No.1, 2nd Floor, Building 102, Beiya Village, Xintianzhai, Wudang District, Guiyang City, Guizhou Province Applicant after: Guizhou Anfei Precision Manufacturing Co.,Ltd. Address before: 550018 No. 1, floor 1, Building 102 and floor 2, building 113, Beiya Road, xintianzhai, Wudang District, Guiyang City, Guizhou Province Applicant before: LIYUAN HYDRAULIC SYSTEM (GUIYANG) Co.,Ltd. |
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