CN114459755A - Device and method for testing power transmission performance of high-power magnetorheological fluid coupler - Google Patents
Device and method for testing power transmission performance of high-power magnetorheological fluid coupler Download PDFInfo
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- CN114459755A CN114459755A CN202111674696.2A CN202111674696A CN114459755A CN 114459755 A CN114459755 A CN 114459755A CN 202111674696 A CN202111674696 A CN 202111674696A CN 114459755 A CN114459755 A CN 114459755A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Abstract
The invention discloses a device and a method for testing the power transmission performance of a high-power magnetorheological fluid coupling, wherein the device comprises a driving piece, a front-end torque and rotating speed sensor, a rear-end torque and rotating speed sensor, a brake and a speed reducer; an output shaft of the driving piece is connected with one end of a front-end torque and rotation speed sensor; two ends of the speed reducer are respectively connected with an output shaft of the driving part and one end of the front-end torque and speed sensor, and/or two ends of the speed reducer are respectively connected with the other end of the rear-end torque and speed sensor and the brake. The technical scheme provided by the invention has the beneficial effects that: because the reducer can output the torque of the driving piece to the magnetorheological fluid coupling to be tested after increasing, even if the maximum output torque of the driving piece is smaller than the limit torque of the magnetorheological fluid coupling, the limit torque of the magnetorheological fluid coupling can be tested after the torque of the reducer on the driving piece is increased, and therefore the limit torque of the high-power magnetorheological fluid coupling can be tested through the device.
Description
Technical Field
The invention relates to the technical field of shaft coupling transmission torque testing, in particular to a device and a method for testing power transmission performance of a high-power magnetorheological fluid shaft coupling.
Background
The coupling is one of the most common parts in mechanical transmission systems. In large mechanical equipment, the coupling needs to bear huge inertia impact load of emergency starting and braking and random overload. Magnetorheological fluid is introduced into the magnetorheological coupling to serve as a transmission medium, power is transmitted by means of shearing action of the magnetorheological fluid between transmission interfaces, and shearing stress of the magnetorheological fluid can be continuously changed by controlling the intensity of an external magnetic field, so that stepless adjustment of transmission torque and rotation speed is achieved. At present, relevant researches on a high-power magnetorheological fluid coupler show that the internal structure size and the magnetic circuit of the coupler are key parameters influencing the performance of the coupler, and meanwhile, the optimization of a magnetorheological fluid current control strategy and algorithm has obvious effects on improving the shock resistance of a transmission system, reducing the vibration and noise of the system and improving the reliability of the transmission system.
Therefore, in the development process of the magnetorheological fluid coupling becoming an industrial product, the key parameters and the control strategy must be determined by an effective design method, and the power transmission performance of the magnetorheological fluid coupling is ensured. However, due to the influence of factors such as processing precision and magnetorheological fluid quality, the power transmission performance of the high-power magnetorheological fluid coupling is different from a theoretical design calculated value to a certain extent, which is also an important technical bottleneck for restricting the industrial popularization of the magnetorheological fluid transmission system. How to detect and verify the reliability of the product, at present, no mature test detection platform and method exist at home and abroad. Therefore, a set of high-power magnetorheological fluid coupling power transmission performance test platform is required to be established, a complete parameter test and data acquisition and analysis system is provided, the power transmission capacity, the time response characteristic, the temperature rise characteristic under different cooling modes and the like of a magnetorheological coupling prototype are tested, the rationality of the design of key parameters of the high-power magnetorheological coupling is verified, an effective system control strategy is provided for compensation, and the working reliability of the magnetorheological coupling is improved.
The chinese utility model patent with application number CN201520895376.3 discloses a magnetorheological transmission device test stand, which can be used for testing the rated torque of a magnetorheological fluid coupling, but because the maximum torque output by an alternating current motor is limited, the device can not test the limit torque of a high-power magnetorheological fluid coupling.
Disclosure of Invention
In view of this, it is necessary to provide a device and a method for testing the power transmission performance of a high-power magnetorheological fluid coupling, so as to solve the technical problem that the existing test stand for a magnetorheological transmission device cannot test the limit torque of the high-power magnetorheological fluid coupling.
In order to achieve the purpose, the invention provides a high-power magnetorheological fluid coupling power transmission performance testing device, which comprises a driving piece, a front-end torque and rotating speed sensor, a rear-end torque and rotating speed sensor, a brake and a speed reducer, wherein the driving piece is arranged on the front end of the driving piece;
an output shaft of the driving piece is connected with one end of the front-end torque and rotation speed sensor;
the other end of the front-end torque and rotation speed sensor is used for being connected with the input end of the magnetorheological fluid coupling to be tested;
one end of the rear-end torque and rotation speed sensor is used for being connected with the output end of the magnetorheological fluid coupling;
the brake is connected with the other end of the rear-end torque and rotation speed sensor;
and two ends of the speed reducer are respectively connected with the output shaft of the driving part and one end of the front-end torque and speed sensor, and/or two ends of the speed reducer are respectively connected with the other end of the rear-end torque and speed sensor and the brake.
In some embodiments, the output shaft of the driver is connected to one end of the front end torque and speed sensor via a first coupling.
In some embodiments, the brake is connected to the other end of the rear torque-to-speed sensor via a second coupling.
In some embodiments, the brake is a magnetic particle brake.
In some embodiments, the high-power magnetorheological fluid coupling power transmission performance testing device further comprises a direct current power controller, and the direct current power controller is electrically connected with the magnetorheological fluid coupling and the excitation current input end of the magnetic powder brake.
In some embodiments, the high-power magnetorheological fluid coupling power transmission performance testing device further includes a slip ring, the other end of the front-end torque and rotation speed sensor is used for being connected with the input end of the magnetorheological fluid coupling to be tested through the slip ring, and the direct-current power controller is electrically connected with the magnetorheological fluid coupling through the slip ring.
In some embodiments, the high-power magnetorheological fluid coupling power transmission performance testing device further comprises a thermocouple sensor, and a probe rod of the thermocouple sensor is in contact with magnetorheological fluid of the magnetorheological fluid coupling.
In some embodiments, the high-power magnetorheological fluid coupling power transmission performance testing device further includes a PLC controller, the signal output end of the thermocouple sensor is electrically connected to the PLC controller via the slip ring, and the dc power controller, the front-end torque and speed sensor, and the rear-end torque and speed sensor are electrically connected to the PLC controller.
The invention also provides a method for testing the power transmission performance of the high-power magnetorheological fluid coupler, which is suitable for the device for testing the power transmission performance of the high-power magnetorheological fluid coupler and comprises a method for testing the limit torque of the magnetorheological fluid coupler, wherein the method for testing the limit torque of the magnetorheological fluid coupler specifically comprises the following steps:
connecting two ends of a speed reducer with an output shaft of the driving piece and one end of the front-end torque and rotation speed sensor respectively, and connecting an input end and an output end of a magnetorheological fluid coupling to be tested with the other end of the front-end torque and rotation speed sensor and one end of the rear-end torque and rotation speed sensor respectively;
the constant power is output to the speed reducer through the driving piece, the speed reducer increases the torque of the driving piece and outputs the torque to the magnetorheological fluid coupler to be tested, and the magnetorheological fluid coupler to be tested outputs the torque to the brake;
and gradually increasing the load of the brake, and recording the limit transmission torque of the magnetorheological fluid coupler at the moment as the limit torque of the magnetorheological fluid coupler when the front-end torque value measured by the front-end torque rotating speed sensor is not equal to the rear-end torque value measured by the rear-end torque rotating speed sensor.
In some embodiments, the method for testing the power transmission performance of the high-power magnetorheological fluid coupling further comprises a method for testing the rated torque of the magnetorheological fluid coupling, and the method for testing the rated torque of the magnetorheological fluid coupling specifically comprises the following steps:
connecting two ends of a speed reducer with the other end of the rear-end torque and rotation speed sensor and the brake respectively, and connecting an input end and an output end of a magnetorheological fluid coupling to be tested with the other end of the front-end torque and rotation speed sensor and one end of the rear-end torque and rotation speed sensor respectively;
the driving piece outputs constant power to the magnetorheological fluid coupling to be tested, the magnetorheological fluid coupling to be tested outputs torque to the speed reducer, and the speed reducer increases the torque and outputs the torque to the brake;
and gradually increasing the load of the brake, and recording the rated transmission torque of the magnetorheological fluid coupler at the moment as the rated torque of the magnetorheological fluid coupler when the load of the brake reaches a preset load.
Compared with the prior art, the technical scheme provided by the invention has the beneficial effects that: when the limit torque of the magnetorheological fluid coupling needs to be tested, two ends of a speed reducer are respectively connected with an output shaft of the driving piece and one end of the front-end torque and rotation speed sensor, and an input end and an output end of the magnetorheological fluid coupling to be tested are respectively connected with the other end of the front-end torque and rotation speed sensor and one end of the rear-end torque and rotation speed sensor; the constant power is output to the speed reducer through the driving piece, the speed reducer increases the torque of the driving piece and outputs the torque to the magnetorheological fluid coupler to be tested, and the magnetorheological fluid coupler to be tested outputs the torque to the brake; the load of the brake is gradually increased, when the front-end torque value measured by the front-end torque rotating speed sensor is unequal to the rear-end torque value measured by the rear-end torque rotating speed sensor, the transmission torque of the magnetorheological fluid coupler is indicated to be limited, the limit transmission torque of the magnetorheological fluid coupler at the moment is recorded and is used as the limit torque of the magnetorheological fluid coupler, and the reducer can increase the torque of the driving piece and then output the torque to the magnetorheological fluid coupler to be tested, so that even if the maximum output torque of the driving piece is smaller than the limit torque of the magnetorheological fluid coupler, the limit torque of the magnetorheological fluid coupler can be tested after the torque of the driving piece is increased through the reducer, and the limit torque of the magnetorheological fluid coupler with high power can be tested through the device.
Drawings
Fig. 1 is an assembly structure diagram of an embodiment of a testing device for power transmission performance of a high-power magnetorheological fluid coupling provided by the invention when testing rated torque of the magnetorheological fluid coupling;
fig. 2 is an assembly structure diagram of the high-power magnetorheological fluid coupling power transmission performance testing device in fig. 1 when testing the limit torque of the magnetorheological fluid coupling;
fig. 3 is a schematic circuit connection diagram of the power transmission performance testing device of the high-power magnetorheological fluid coupling in fig. 1;
in the figure: the system comprises a driving piece 1, a front-end torque and rotation speed sensor 2, a rear-end torque and rotation speed sensor 3, a brake 4, a speed reducer 5, a magnetorheological fluid coupling 6, a magnetic coil 61, a first coupling 7, a second coupling 8, a direct current power controller 9, a collector slip ring 10, a thermocouple sensor 11, a PLC controller 12, a sampling circuit 13, a frequency converter 14 and an industrial personal computer 15.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 1 and fig. 2, the invention provides a power transmission performance testing device for a high-power magnetorheological fluid coupling, which comprises a driving piece 1, a front-end torque and rotation speed sensor 2, a rear-end torque and rotation speed sensor 3, a brake 4 and a speed reducer 5.
The output shaft of the driving member 1 is connected to one end of the front end torque and speed sensor 2, in this embodiment, the driving member 1 is a driving motor. The other end of the front-end torque and rotation speed sensor 2 is used for being connected with the input end of the magnetorheological fluid coupling 6 to be tested. And one end of the rear-end torque and rotation speed sensor 3 is used for being connected with the output end of the magnetorheological fluid coupling 6. The brake 4 is connected with the other end of the rear end torque and rotation speed sensor 3.
Two ends of the speed reducer 5 are respectively connected with the output shaft of the driving part 1 and one end of the front-end torque and speed sensor 2, and/or two ends of the speed reducer 5 are respectively connected with the other end of the rear-end torque and speed sensor 3 and the brake 4.
When the limit torque of the magnetorheological fluid coupling 6 needs to be tested, two ends of a speed reducer 5 are respectively connected with an output shaft of the driving piece 1 and one end of the front-end torque and rotation speed sensor 2, and an input end and an output end of the magnetorheological fluid coupling 6 to be tested are respectively connected with the other end of the front-end torque and rotation speed sensor 2 and one end of the rear-end torque and rotation speed sensor 3; the constant power is output to the speed reducer 5 through the driving piece 1, the speed reducer 5 increases the torque of the driving piece 1 and outputs the torque to the magnetorheological fluid coupling 6 to be tested, and the magnetorheological fluid coupling 6 to be tested outputs the torque to the brake 4; the load of the brake 4 is gradually increased, when the front end torque value measured by the front end torque rotating speed sensor 2 is unequal to the rear end torque value measured by the rear end torque rotating speed sensor 3, the transmission torque of the magnetorheological fluid coupler 6 is indicated to be limited, the limit transmission torque of the magnetorheological fluid coupler 6 at the moment is recorded and is used as the limit torque of the magnetorheological fluid coupler 6, and the reducer 5 can increase the torque of the driving piece 1 and then output the torque to the magnetorheological fluid coupler 6 to be tested, so that even if the maximum output torque of the driving piece 1 is smaller than the limit torque of the magnetorheological fluid coupler 6, the limit torque of the magnetorheological fluid coupler 6 can be tested after the torque of the driving piece 1 is increased through the reducer 5, and the limit torque of the high-power magnetorheological fluid coupler can be tested through the device.
In order to implement the connection between the output shaft of the driving member 1 and one end of the front end torque and speed sensor 2, referring to fig. 1 and 2, in a preferred embodiment, the output shaft of the driving member 1 and one end of the front end torque and speed sensor 2 are connected via a first coupling 7.
In order to implement the connection between the brake 4 and the other end of the rear-end torque and rotation speed sensor 3, referring to fig. 1 and 2, in a preferred embodiment, the brake 4 and the other end of the rear-end torque and rotation speed sensor 3 are connected via a second coupling 8.
To embody the function of the brake 4, referring to fig. 1 and 2, in a preferred embodiment, the brake 4 is a magnetic particle brake.
In order to facilitate the control of the magnetorheological fluid coupler 6 and the magnetic powder brake, referring to fig. 1 to 3, in a preferred embodiment, the power transmission performance testing apparatus for the high-power magnetorheological fluid coupler further includes a dc power controller 9, and the dc power controller 9 is electrically connected to both the magnetorheological fluid coupler 6 and the excitation current input end of the magnetic powder brake.
In order to specifically realize the connection between the other end of the front-end torque and rotation speed sensor 2 and the input end of the magnetorheological fluid coupling 6, referring to fig. 1 to 3, in a preferred embodiment, the power transmission performance testing apparatus for the high-power magnetorheological fluid coupling further includes a slip ring 10, the other end of the front-end torque and rotation speed sensor 2 is used for being connected with the input end of the magnetorheological fluid coupling 6 to be tested through the slip ring 10, and the dc power controller 9 is electrically connected with the magnetorheological fluid coupling 6 through the slip ring 10.
In order to measure the transmission torque of the magnetorheological fluid coupling 6, referring to fig. 1 to 3, in a preferred embodiment, the high-power magnetorheological fluid coupling power transmission performance testing apparatus further includes a thermocouple sensor 11, and a probe of the thermocouple sensor 11 is in contact with the magnetorheological fluid of the magnetorheological fluid coupling 6.
For convenience of automatic control, referring to fig. 1 to 3, in a preferred embodiment, the power transmission performance testing apparatus for the high-power magnetorheological fluid coupling further includes a PLC controller 12, a signal output end of the thermocouple sensor 11 is electrically connected to the PLC controller 12 through the slip ring 10, and the dc power controller 9, the front-end torque and rotation speed sensor 2, and the rear-end torque and rotation speed sensor 3 are electrically connected to the PLC controller 12. Specifically, the high-power magnetorheological fluid coupling power transmission performance testing device further comprises a sampling circuit 13 and a frequency converter 14, wherein the input end of the sampling circuit 13 is electrically connected with the front-end torque and rotation speed sensor 2, the rear-end torque and rotation speed sensor 3 and the collector slip ring 10, the output end of the sampling circuit 13 is electrically connected with the PLC 12, and the PLC 12 is electrically connected with the driving piece 1 through the frequency converter 14.
The invention also provides a method for testing the power transmission performance of the high-power magnetorheological fluid coupler, which is suitable for the device for testing the power transmission performance of the high-power magnetorheological fluid coupler and comprises a method for testing the limit torque of the magnetorheological fluid coupler, wherein the method for testing the limit torque of the magnetorheological fluid coupler specifically comprises the following steps:
s11, connecting two ends of the speed reducer 5 with the output shaft of the driving member 1 and one end of the front-end torque and rotation speed sensor 2, respectively, and connecting the input end and the output end of the magnetorheological fluid coupling 6 to be tested with the other end of the front-end torque and rotation speed sensor 2 and one end of the rear-end torque and rotation speed sensor 3, respectively (as shown in fig. 2);
s12, outputting constant power to the speed reducer 5 through the driving piece 1, increasing the torque of the driving piece 1 by the speed reducer 5, and outputting the torque to the magnetorheological fluid coupling 6 to be tested, and outputting the torque to the brake 4 by the magnetorheological fluid coupling 6 to be tested;
and S13, gradually increasing the load of the brake 4, and recording the limit transmission torque of the magnetorheological fluid coupler 6 at the moment as the limit torque of the magnetorheological fluid coupler 6 when the front-end torque value measured by the front-end torque and rotation speed sensor 2 is not equal to the rear-end torque value measured by the rear-end torque and rotation speed sensor 3.
Further, the method for testing the power transmission performance of the high-power magnetorheological fluid coupling further comprises a method for testing the rated torque of the magnetorheological fluid coupling, and the method for testing the rated torque of the magnetorheological fluid coupling specifically comprises the following steps:
s21, connecting two ends of the speed reducer 5 with the other end of the rear-end torque and rotation speed sensor 3 and the brake 4, respectively, and connecting the input end and the output end of the magnetorheological fluid coupling 6 to be tested with the other end of the front-end torque and rotation speed sensor 2 and one end of the rear-end torque and rotation speed sensor 3, respectively (as shown in fig. 1);
s21, outputting constant power to the magnetorheological fluid coupler 6 to be tested through the driving piece 1, outputting torque to the speed reducer 5 through the magnetorheological fluid coupler 6 to be tested, and outputting the torque to the brake 4 after the speed reducer 5 increases the torque;
and S23, gradually increasing the load of the brake 4, and recording the rated transmission torque of the magnetorheological fluid coupling 6 at the moment as the rated torque of the magnetorheological fluid coupling 6 when the load of the brake 4 reaches the preset load.
The following describes in detail a specific operation procedure of an embodiment of the high-power magnetorheological fluid coupling power transmission performance testing apparatus provided by the present invention:
The method for testing the rated power transmission performance of the magnetorheological fluid coupling specifically comprises the following steps:
the method comprises the following steps: two ends of a speed reducer 5 are respectively connected with the other end of the rear-end torque and rotation speed sensor 3 and the brake 4, and an input end and an output end of a magnetorheological fluid coupling 6 to be tested are respectively connected with the other end of the front-end torque and rotation speed sensor 2 and one end of the rear-end torque and rotation speed sensor 3;
step two: setting basic operation parameters of a test bench according to the rated transmission torque of the magnetorheological fluid coupling to be tested, wherein the basic operation parameters specifically comprise the rated transmission torque, the motor power, the load power, the rated load test operation time and the like; setting parameters of a test bench control system according to the actual use condition of the magnetorheological fluid coupling to be tested, wherein the parameters specifically comprise motor starting acceleration time, motor braking deceleration time, a load dynamic loading curve set value and the like; setting data sampling analysis configuration parameters according to the control precision requirement of the magnetorheological fluid coupling to be tested, wherein the data sampling analysis configuration parameters specifically comprise a torque and rotating speed sampling period, a temperature sampling period, operation cycle times, data amplification times, a data storage format and the like;
step three: and starting the test bench, and after the test bench starts to operate, the industrial personal computer 15 sends an operation instruction to the PLC 12 through Ethernet communication. The industrial personal computer 15 sends an operation instruction to the PLC controller 12 through ethernet communication. The PLC 12 sends a driving motor control instruction to the frequency converter 14 through a communication interface, wherein the driving motor control instruction specifically comprises operating frequency and acceleration and deceleration time; the PLC 12 sends a current driving instruction to the direct current power controller 9 through the analog quantity interface, and the direct current power controller 9 directly outputs a control signal to a current input control end of the magnetic coil 61 of the magnetorheological fluid coupler 6 according to a set curve, wherein the control signal specifically comprises the size of an exciting current and an exciting current acceleration and deceleration curve; the PLC 12 sends a current driving instruction to the direct current power controller 9 through the analog quantity interface, and the direct current power controller 9 controls the magnetic powder brake to start loading the magnetorheological fluid coupling 6 according to the set curve;
step four: when the magnetic powder brake reaches the set rated load, the sampling circuit starts to sample the front-end torque and rotation speed sensor 2, the rear-end torque and rotation speed sensor 3 and the thermocouple sensor 11. Wherein, the 0-5khz high-speed pulse signals output by the front-end torque rotating speed sensor 2 and the rear-end torque rotating speed sensor 3 are connected to the input end of the sampling circuit 13, and the thermocouple sensor 11 outputs an analog quantity +/-5V voltage signal which is connected to the input end of the sampling circuit 13. The sampling circuit 13 converts all sensor data into analog quantity 4-20mA current signals and sends the analog quantity 4-20mA current signals to the PLC controller 12, and the PLC controller 12 sends experimental data to the industrial personal computer 15 through an Ethernet communication line for storage;
step five: after the driving motor reaches the set rated operation time, the PLC 12 controls the frequency converter 14 to stop the driving motor. The sampling circuit 13 sends the experimental data to the PLC controller 12, the PLC controller 12 sends the experimental data to the industrial personal computer 15 for storage, the running parameters of the magnetorheological fluid coupler 6 under the rated working condition are recorded, and data processing and analysis are completed through data analysis software.
Step six: and resetting parameters, and testing the rated power transmission performance of the next group of magnetorheological fluid couplers 6. And repeating the second step to the sixth step until all the tests are finished.
The method for testing the ultimate power transmission performance of the magnetorheological fluid coupling specifically comprises the following steps:
the method comprises the following steps: two ends of the speed reducer 5 are respectively connected with the output shaft of the driving piece 1 and one end of the front-end torque and rotation speed sensor 2, and the input end and the output end of the magnetorheological fluid coupling 6 to be tested are respectively connected with the other end of the front-end torque and rotation speed sensor 2 and one end of the rear-end torque and rotation speed sensor 3.
Step two: setting a test bench limit operation parameter according to the theoretical limit transmission torque of the magnetorheological fluid coupling to be tested, wherein the test bench limit operation parameter specifically comprises motor power, load power, a load dynamic loading curve, allowable slip operation time, a torque rotating speed sampling period, a temperature sampling period, operation cycle times, a data amplification factor, a data storage format and the like;
step three: and starting the test bench, and sending an operation instruction to the PLC 12 by the industrial personal computer 15 through Ethernet communication. The PLC 12 controls the frequency converter 14 and the magnetorheological fluid coupler 6 to respectively reach a rated rotating speed and a rated exciting current. The PLC controller 12 controls the magnetic particle brake to start the gradual loading.
Step four: in the loading process of the magnetic powder brake, the sampling circuit 13 starts to sample the front-end torque and rotation speed sensor 2, the rear-end torque and rotation speed sensor 3 and the thermocouple sensor 11 in real time. Wherein, the 0-5khz high-speed pulse signals output by the front-end torque rotating speed sensor 2 and the rear-end torque rotating speed sensor 3 are connected to the input end of the sampling circuit, and the thermocouple sensor 11 outputs an analog quantity +/-5V voltage signal which is connected to the input end of the sampling circuit 13. The sampling circuit 13 converts all sensor data into analog quantity 4-20mA current signals and sends the analog quantity 4-20mA current signals to the PLC controller 12, and the PLC controller 12 sends experimental data to the industrial personal computer 15 through an Ethernet communication line for storage;
step five: and the front-end torque and rotation speed sensor 2 and the rear-end torque and rotation speed sensor 3 perform data real-time comparison. When the front-end torque and rotation speed sensors 2 and the rear-end torque and rotation speed sensors 3 at the two ends of the magnetorheological fluid coupling 6 detect system slip, the PLC 12 controls the driving motor to automatically stop. The industrial personal computer 15 records the slip data value and the real-time temperature value. And data analysis software in the industrial personal computer automatically generates a test report of the ultimate power transmission performance of the magnetorheological fluid coupling according to the stored data. The stored original data is output in a graph or Excel table form for a tester to consult. And (5) finishing the test.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A high-power magnetorheological fluid coupling power transmission performance testing device is characterized by comprising a driving piece, a front-end torque and rotating speed sensor, a rear-end torque and rotating speed sensor, a brake and a speed reducer;
an output shaft of the driving piece is connected with one end of the front-end torque and rotation speed sensor;
the other end of the front-end torque and rotation speed sensor is used for being connected with the input end of the magnetorheological fluid coupling to be tested;
one end of the rear-end torque and rotation speed sensor is used for being connected with the output end of the magnetorheological fluid coupling;
the brake is connected with the other end of the rear-end torque and rotation speed sensor;
and two ends of the speed reducer are respectively connected with the output shaft of the driving part and one end of the front-end torque and speed sensor, and/or two ends of the speed reducer are respectively connected with the other end of the rear-end torque and speed sensor and the brake.
2. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 1, wherein an output shaft of the driving member is connected with one end of the front-end torque and rotation speed sensor through a first coupling.
3. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 1, wherein the brake is connected with the other end of the rear-end torque and rotation speed sensor through a second coupling.
4. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 1, wherein the brake is a magnetic powder brake.
5. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 4, further comprising a direct current power supply controller, wherein the direct current power supply controller is electrically connected with the magnetorheological fluid coupling and the excitation current input end of the magnetic powder brake.
6. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 5, further comprising a current collecting slip ring, wherein the other end of the front-end torque and rotation speed sensor is used for being connected with an input end of the magnetorheological fluid coupling to be tested through the current collecting slip ring, and the direct current power controller is electrically connected with the magnetorheological fluid coupling through the current collecting slip ring.
7. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 6, further comprising a thermocouple sensor, wherein a probe rod of the thermocouple sensor is in contact with the magnetorheological fluid of the magnetorheological fluid coupling.
8. The high-power magnetorheological fluid coupling power transmission performance testing device according to claim 7, further comprising a PLC (programmable logic controller), wherein the signal output end of the thermocouple sensor is electrically connected with the PLC through the collector slip ring, and the DC power controller, the front-end torque and speed sensor and the rear-end torque and speed sensor are electrically connected with the PLC.
9. A method for testing the power transmission performance of a high-power magnetorheological fluid coupling is suitable for the device for testing the power transmission performance of the high-power magnetorheological fluid coupling according to any one of claims 1 to 8, and is characterized by comprising a method for testing the limit torque of the magnetorheological fluid coupling, wherein the method for testing the limit torque of the magnetorheological fluid coupling specifically comprises the following steps:
connecting two ends of a speed reducer with an output shaft of the driving piece and one end of the front-end torque and rotation speed sensor respectively, and connecting an input end and an output end of a magnetorheological fluid coupling to be tested with the other end of the front-end torque and rotation speed sensor and one end of the rear-end torque and rotation speed sensor respectively;
the constant power is output to the speed reducer through the driving piece, the speed reducer increases the torque of the driving piece and outputs the torque to the magnetorheological fluid coupler to be tested, and the magnetorheological fluid coupler to be tested outputs the torque to the brake;
and gradually increasing the load of the brake, and recording the limit transmission torque of the magnetorheological fluid coupler at the moment as the limit torque of the magnetorheological fluid coupler when the front-end torque value measured by the front-end torque rotating speed sensor is not equal to the rear-end torque value measured by the rear-end torque rotating speed sensor.
10. The method for testing the power transmission performance of the high-power magnetorheological fluid coupling according to claim 9, further comprising a method for testing the rated torque of the magnetorheological fluid coupling, wherein the method for testing the rated torque of the magnetorheological fluid coupling specifically comprises the following steps:
connecting two ends of a speed reducer with the other end of the rear-end torque and rotation speed sensor and the brake respectively, and connecting an input end and an output end of a magnetorheological fluid coupling to be tested with the other end of the front-end torque and rotation speed sensor and one end of the rear-end torque and rotation speed sensor respectively;
the driving piece outputs constant power to the magnetorheological fluid coupling to be tested, the magnetorheological fluid coupling to be tested outputs torque to the speed reducer, and the speed reducer increases the torque and outputs the torque to the brake;
and gradually increasing the load of the brake, and recording the rated transmission torque of the magnetorheological fluid coupler at the moment as the rated torque of the magnetorheological fluid coupler when the load of the brake reaches a preset load.
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| CN209542073U (en) * | 2019-01-15 | 2019-10-25 | 浙江外国语学院 | A kind of axis torsional deformation test Special test platform |
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2021
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| JPH0472541A (en) * | 1990-07-13 | 1992-03-06 | Honda Motor Co Ltd | Inspecting method for viscous coupling |
| CN102175451A (en) * | 2011-01-22 | 2011-09-07 | 安徽工业大学 | Dynamic load test bed for shaft coupler |
| CN103558025A (en) * | 2013-10-30 | 2014-02-05 | 山东省科学院海洋仪器仪表研究所 | Elastic coupling working condition test stand |
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