CN110044611B - Electromagnetic type coupling comprehensive performance test bench and test method thereof - Google Patents
Electromagnetic type coupling comprehensive performance test bench and test method thereof Download PDFInfo
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- CN110044611B CN110044611B CN201910337396.1A CN201910337396A CN110044611B CN 110044611 B CN110044611 B CN 110044611B CN 201910337396 A CN201910337396 A CN 201910337396A CN 110044611 B CN110044611 B CN 110044611B
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
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- 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
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention discloses an electromagnetic type coupling comprehensive performance test board and a test method thereof, wherein the test board comprises a rotary induction motor, a power meter, an intelligent speed-regulating electromagnetic type coupling, a temperature sensor, a water pump, a throttle valve, a flowmeter and a bucket; the intelligent speed-regulating electromagnetic coupling comprises an excitation rotor and a squirrel cage rotor, wherein a fixed shaft is fixed on the excitation rotor, and a telescopic shaft is fixed on the squirrel cage rotor; the power output shaft of the rotary induction motor is fixedly connected with the fixed shaft, and the telescopic shaft is fixedly connected with a water pump rotating shaft in the water pump; the fixed shaft is provided with a first rotary encoder and a first torque sensor, and the telescopic shaft is provided with a second rotary encoder and a second torque sensor; by the invention, the test condition is comprehensive. The performance indexes, temperature, efficiency, power factor and energy-saving effect in various aspects can be measured; various comparisons can be made. The comparison between the couplings and the throttle valve can be realized.
Description
Technical Field
The invention discloses an electromagnetic type coupling comprehensive performance test bench and a test method thereof, belongs to the field of electromagnetic speed regulation transmission, can comprehensively test the performance of an electromagnetic type coupling, is mainly applied to the design stage of an electromagnetic type coupling sample, and can accurately test various indexes of the designed electromagnetic type coupling and compare the indexes with a traditional throttle valve, thereby verifying the energy-saving effect and the practicability of the designed electromagnetic type coupling. The device can apply to the test occasion of electromagnetic type shaft coupling, and the shaft coupling that can test is: intelligent speed-regulating electromagnetic coupler, disk speed-regulating electromagnetic coupler, eddy current electromagnetic coupler, mechanical coupler, etc.
Background
Electromagnetic couplings have many advantages such as ease of maintenance, energy savings, reduced vibration and soft start, etc. However, the existing electromagnetic couplings are of various types, and the electromagnetic couplings are greatly affected by the speed regulation range, the temperature rise, the loss, the energy saving effect and other indexes of the electromagnetic couplings. Therefore, a comprehensive comparison of the performance of the electromagnetic coupling is required.
After the electromagnetic type coupler is manufactured, a common coupler testing method and a common coupler testing device are continued, and obviously, the requirements for comprehensive comparison of various couplers cannot be met, so that the testing of the mechanical property performance index of the motor becomes a main problem.
The device takes the water pump as a load, and can directly test the efficiency and the temperature rise of the electromagnetic coupling and the energy-saving effect compared with a throttle valve on the testing device through the sensor and some measuring devices.
Disclosure of Invention
The invention aims to provide an electromagnetic coupling comprehensive performance test bench and a test method thereof, aiming at the problems in the prior art.
The purpose of the invention is realized as follows: the utility model provides an electromagnetic type shaft coupling comprehensive properties testboard which characterized by: the intelligent speed regulation water tank comprises a rotary induction motor, a power meter, an intelligent speed regulation electromagnetic coupling, a temperature sensor, a water pump, a throttle valve, a flowmeter and a water tank;
the intelligent speed-regulating electromagnetic coupling comprises an excitation rotor and a squirrel cage rotor, wherein the excitation rotor is in clearance fit with the squirrel cage rotor, a fixed shaft is fixed on the excitation rotor, and a telescopic shaft is fixed on the squirrel cage rotor;
the power output shaft of the rotary induction motor is fixedly connected with the fixed shaft, and the telescopic shaft is fixedly connected with a water pump rotating shaft in the water pump;
the fixed shaft is provided with a first rotary encoder and a first torque sensor, and the telescopic shaft is provided with a second rotary encoder and a second torque sensor;
the first rotary encoder is used for measuring the rotating speed of an excitation rotor of the intelligent speed-regulating electromagnetic coupler, and the second rotary encoder is used for measuring the rotating speed of a squirrel cage rotor of the intelligent speed-regulating electromagnetic coupler; the first torque sensor is used for measuring the torque of an excitation rotor of the intelligent speed-regulating electromagnetic coupler, and the second torque sensor is used for measuring the torque of a squirrel cage rotor of the intelligent speed-regulating electromagnetic coupler;
the power meter is arranged on the rotary induction motor and used for measuring the apparent power and the active power of the rotary induction motor;
the temperature sensor is arranged on the intelligent speed-regulating electromagnetic coupler and used for measuring the temperature rise of the intelligent speed-regulating electromagnetic coupler;
the water pump is arranged on the load side of the intelligent speed-regulating electromagnetic coupler and used for bearing a load, and a water pump rotating shaft in the water pump is fixedly connected with the telescopic shaft;
a water pump water inlet of the water pump is communicated with a bucket water outlet of the bucket through a first water pipe, and a water pump water outlet of the water pump is communicated with a bucket water inlet of the bucket through a second water pipe;
the throttle valve is arranged at the water outlet of the water pump; the flowmeter is mounted on the second water pipe.
The first torque sensor is arranged between the first rotary encoder and the intelligent speed regulation electromagnetic coupler.
And the second rotary encoder is arranged between the second torque sensor and the intelligent speed regulation electromagnetic coupler.
A water inlet of the bucket on the bucket is positioned at the top of the bucket, and a water outlet of the bucket is positioned on the side edge of the lower part of the bucket; the flowmeter is installed at one end close to a water inlet of the water bucket.
A method for testing an electromagnetic coupling comprehensive performance test bench is characterized by comprising the following steps:
1) regulating the flow rate by using a throttle valve;
locking an intelligent speed regulation electromagnetic coupling, wherein the intelligent speed regulation electromagnetic coupling only plays a role of mechanical connection at the moment, regulating a throttle valve to change the flow from 0 to a rated flow speed, and drawing a variation curve of consumed power along with the flow and a variation curve of power factor along with the flow through data measured by a power meter; calculating effective output power according to data measured by the flowmeter, and further obtaining a change curve of the efficiency of the whole system along with the flow;
2) the intelligent speed-regulating electromagnetic coupling is used for regulating the flow;
the throttle valve is completely opened, and the flow is regulated through an intelligent speed regulation electromagnetic coupling; the slip ratio of the excitation rotor and the squirrel cage rotor is adjusted by adjusting the telescopic shaft, so that the flow is adjusted; firstly, adjusting the coupling area of the excitation rotor and the squirrel-cage rotor to be small to enable the speed of the squirrel-cage rotor to be 0, and then slowly increasing the coupling area of the excitation rotor and the squirrel-cage rotor until the flow reaches the rated flow;
3) collecting data;
a. the efficiency and the loss of the intelligent speed-regulating electromagnetic coupling change along with the flow and the slip;
the rotating speed of the intelligent speed-regulating electromagnetic coupling is measured by the first rotary encoder and the second rotary encoder on two sides of the intelligent speed-regulating electromagnetic coupling, the torque on two sides is measured by the first torque inductor and the second torque inductor on two sides, the input and output power on two sides is measured, and the change curves of efficiency and loss along with flow and slip are obtained;
b. the temperature rise of the intelligent speed-regulating electromagnetic coupling changes along with the flow and the slip ratio;
the temperature change is measured by the temperature sensor, the rotating speeds of the two sides are measured by the first rotary encoder and the second rotary encoder of the two sides, the slip ratio is further obtained, the flow can be measured by the flowmeter, and therefore a characteristic curve of the temperature rise of the intelligent speed-regulating electromagnetic coupling along with the change of the slip ratio and the flow is drawn;
c. the efficiency and power factor of the whole system change with slip and flow;
drawing a variation curve of consumed power along with flow and a variation curve of power factor along with flow through data measured by a power meter; calculating effective output power according to data measured by the flowmeter, and further obtaining a change curve of the efficiency of the whole system along with the flow; obtaining a change curve of the power factor along with the flow from a power meter;
finally, curves obtained by using the throttle valve and the intelligent speed regulation electromagnetic coupler are compared, namely the energy-saving effect of the intelligent speed regulation electromagnetic coupler is good and bad, and the intelligent speed regulation electromagnetic coupler can be compared with other couplers.
The invention has reasonable structure and advanced and scientific method, and in order to measure the comprehensive index of the electromagnetic coupling, the invention needs to measure the change curve of the efficiency of the electromagnetic coupling along with the slip (or flow) of a magnetic rotor (excitation rotor) and an induction rotor (squirrel cage rotor), the change curve of the temperature rise of the electromagnetic coupling along with the slip (or flow) of the magnetic rotor and the induction rotor, the change curve of the loss of the electromagnetic coupling along with the slip (or flow) of the magnetic rotor and the induction rotor, the change curve of the power factor when a throttle valve is adopted and the efficiency of the whole system along with the flow, and the change curve of the power factor when the electromagnetic coupling is adopted and the efficiency of the whole system along with the flow.
1. The device is divided into the following parts:
(1) a rotating induction motor; providing power for the experimental device.
(2) A rotary encoder (including a first rotary encoder and a second rotary encoder); the device is arranged on the side of a motor (a rotary induction motor) and the side of a load and is used for measuring the rotating speed of a magnetic rotor (an excitation rotor) and an induction rotor (a squirrel cage rotor) of the intelligent speed-regulating electromagnetic coupling.
(3) A torque sensor; the torque measuring device is arranged on the side of a motor (a rotary induction motor) and the side of a load and is used for measuring the torque of a magnetic rotor (an excitation rotor) and an induction rotor (a squirrel cage rotor) of the intelligent speed-regulating electromagnetic coupling.
(4) A power meter; and is installed at the side of a motor (rotating induction motor) for measuring the apparent power and active power of the rotating induction motor.
(6) An intelligent speed-regulating electromagnetic coupling; subject of experimental device measurement.
(7) A temperature sensor; the intelligent speed regulation electromagnetic coupler is installed on the intelligent speed regulation electromagnetic coupler and used for measuring the temperature rise of the intelligent speed regulation electromagnetic coupler.
(8) A water pump; the intelligent speed-regulating electromagnetic coupler is arranged on the load side of the intelligent speed-regulating electromagnetic coupler and is used for bearing a load.
(9) A throttle valve; and the intelligent speed-regulating electromagnetic coupler is arranged at the water outlet of the water pump and is used as a comparison object of the intelligent speed-regulating electromagnetic coupler.
(10) A flow meter; the device is arranged at the tail end of a water pipe (a second water pipe) close to the side of the water barrel, and the reason is that the water flow has a flow separation phenomenon in the water pipe, and the device can accurately measure the water yield when being arranged at the tail end.
The installation and the structure of each part are schematically shown in figure 1.
2. The working state of the device is as follows:
(1) regulating flow using a throttle valve
The intelligent speed regulation coupling (intelligent speed regulation electromagnetic coupling) is locked, at the moment, the intelligent speed regulation coupling only plays a role of mechanical connection, the throttle valve is regulated to change the flow from 0 to a rated flow speed, data measured by a power meter are drawn, and a change curve of consumed power along with the flow and a change curve of power factor along with the flow are drawn. Effective output power can be calculated according to data measured by the flowmeter, and then a change curve of the efficiency of the whole system along with the flow is obtained.
(2) Flow regulation using intelligent speed regulation coupling
And (4) fully opening the throttle valve, and regulating the flow through the intelligent speed regulation coupler. The structure of the intelligent speed-regulating electromagnetic coupling is shown in fig. 2, and slip ratios of a magnetic rotor (excitation rotor) and an induction rotor (squirrel cage rotor) can be regulated by regulating a telescopic shaft, so that the flow is regulated. Firstly, the coupling area of the magnetic rotor and the induction rotor is adjusted to be small, the speed of the induction rotor is 0, and then the coupling area of the magnetic rotor and the induction rotor is slowly increased until the flow reaches the rated flow.
3. Collecting data;
(1) efficiency and loss of intelligent speed regulation coupling change with flow and slip
The rotating speed of the intelligent speed-regulating electromagnetic coupling can be measured by the rotary encoders on the two sides of the intelligent speed-regulating electromagnetic coupling, and the torques on the two sides can be measured by the torque inductors on the two sides, so that the input and output powers on the two sides can be measured, and the change curves of the efficiency and the loss along with the flow and the slip ratio can be obtained.
(2) Temperature rise of intelligent speed regulation coupling changes with flow and slip
The temperature change can be measured through the temperature sensor, the rotating speeds of the two sides can be measured through the rotary encoders on the two sides, the slip ratio is further obtained, the flow can be measured through the thermometer, and therefore a characteristic curve of the temperature rise of the intelligent speed regulation coupling along with the slip ratio and the flow change is drawn.
(3) Variation of overall system efficiency and power factor with slip and flow
And drawing a change curve of consumed power along with the flow and a change curve of power factor along with the flow through data measured by a power meter. Effective output power can be calculated according to data measured by the flowmeter, and then a change curve of the efficiency of the whole system along with the flow is obtained. The power factor variation curve with the flow can be obtained from the power meter.
Finally, the curves obtained by using the throttle valve and the intelligent speed regulation coupler are compared, namely the energy-saving effect of the intelligent speed regulation electromagnetic coupler is good or bad. If the intelligent speed regulation coupler is replaced by other couplers, the comparison between the couplers can be realized.
By the invention, the test condition is comprehensive. The performance indexes, temperature, efficiency, power factor and energy-saving effect in various aspects can be measured; various comparisons can be made. The comparison between the couplings and the throttle valve can be realized.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of an intelligent speed-regulating electromagnetic coupling.
In the figure: the intelligent speed-regulating water pump comprises a rotary induction motor 1, a power meter 4, a water bucket 5, an intelligent speed-regulating electromagnetic coupling 6, an excitation rotor 6-1, a squirrel-cage rotor 6-2, a temperature sensor 7, a water pump 8, a throttle valve 9, a flow meter 10, a fixed shaft 11, a telescopic shaft 12, a first rotary encoder 13-1, a second rotary encoder 13-2, a first torque induction instrument 14-1 and a second torque induction instrument 14-2.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
The utility model provides an electromagnetic type shaft coupling comprehensive properties testboard, includes rotary induction motor 1, power meter 4, intelligent speed governing electromagnetic type shaft coupling 6, temperature sensor 7, water pump 8, choke valve 9, flowmeter 10, cask 13. The intelligent speed-regulating electromagnetic coupling 6 comprises an excitation rotor 6-1 and a squirrel cage rotor 6-2, wherein an air gap exists between the excitation rotor 6-1 and the squirrel cage rotor 6-2, the excitation rotor 6-1 is in clearance fit with the squirrel cage rotor, a fixed shaft 11 is fixed on the excitation rotor 6-1, and a telescopic shaft 12 is fixed on the squirrel cage rotor 6-2. The power output shaft of the rotary induction motor 1 is fixedly connected with the fixed shaft 11, and the telescopic shaft 12 is fixedly connected with a water pump rotating shaft in the water pump 8.
A first rotary encoder 13-1 and a first torque sensor 14-1 are mounted on the fixed shaft 11, and a second rotary encoder 13-2 and a second torque sensor 14-2 are mounted on the telescopic shaft 12. The first rotary encoder 13-1 is used for measuring the rotating speed of an excitation rotor 6-1 of the intelligent speed-regulating electromagnetic coupling 6, and the second rotary encoder 13-2 is used for measuring the rotating speed of a squirrel cage rotor 6-2 of the intelligent speed-regulating electromagnetic coupling 6; the first torque inductor 14-1 is used for measuring the torque of the excitation rotor 6-1 of the intelligent speed-regulating electromagnetic coupling 6, and the second torque inductor 14-2 is used for measuring the torque of the squirrel cage rotor 6-2 of the intelligent speed-regulating electromagnetic coupling 6.
The power meter 4 is installed on the rotary induction motor 1 and used for measuring the apparent power and the active power of the rotary induction motor 1; the temperature sensor 7 is installed on the intelligent speed regulation electromagnetic coupling 6 and used for measuring the temperature rise of the intelligent speed regulation electromagnetic coupling 6.
The water pump 8 is arranged on the load side of the intelligent speed-regulating electromagnetic coupler 6 and used for bearing a load, and a water pump rotating shaft in the water pump 8 is fixedly connected with the telescopic shaft 12.
A water pump water inlet of the water pump 8 is communicated with a water barrel water outlet of the water barrel 5 through a first water pipe, and a water pump water outlet of the water pump 8 is communicated with a water barrel water inlet of the water barrel 5 through a second water pipe; the throttle valve 9 is arranged at the water outlet of the water pump 8; the flow meter 10 is mounted on the second water pipe.
Further, the first torque sensor 14-1 is arranged between the first rotary encoder 13-1 and the intelligent speed regulation electromagnetic coupling 6. The second rotary encoder 13-2 is arranged between the second torque sensor 14-2 and the intelligent speed-regulating electromagnetic coupling 6. A water inlet of the water bucket 5 is positioned at the top of the water bucket 5, and a water outlet of the water bucket is positioned on the side edge of the lower part of the water bucket 5; the flow meter 10 is installed at one end near the water inlet of the water tub 5.
During testing, 1) the flow is adjusted by using a throttle valve 9;
the intelligent speed regulation electromagnetic coupling 6 is locked, at the moment, the intelligent speed regulation electromagnetic coupling 6 only plays a role of mechanical connection, the throttle valve 9 is adjusted to change the flow from 0 to a rated flow speed, and a change curve of consumed power along with the flow and a change curve of power factor along with the flow are drawn through data measured by the power meter 4; the effective output power is calculated from the data measured by the flow meter 10, and the change curve of the efficiency of the whole system along with the flow is obtained.
2) The intelligent speed-regulating electromagnetic coupling 6 is used for regulating the flow;
the throttle valve 9 is completely opened, and the flow is regulated through the intelligent speed regulation electromagnetic coupling 6; the slip ratio of the excitation rotor 6-1 and the squirrel cage rotor 6-2 is adjusted by adjusting the telescopic shaft 12, so that the flow is adjusted; firstly, the coupling area of the excitation rotor 6-1 and the squirrel cage rotor 6-2 is adjusted to be small to enable the speed of the squirrel cage rotor 6-2 to be 0, and then the coupling area of the excitation rotor 6-1 and the squirrel cage rotor 6-2 is slowly increased until the flow reaches the rated flow;
3) collecting data;
a. the efficiency and the loss of the intelligent speed-regulating electromagnetic coupling 6 change along with the flow and the slip;
the rotating speed of the intelligent speed-regulating electromagnetic coupling 6 is measured through a first rotary encoder 13-1 and a second rotary encoder 13-2 on two sides of the intelligent speed-regulating electromagnetic coupling 6, the torque on two sides is measured through a first torque inductor 14-1 and a second torque inductor 14-2 on two sides, the input and output power on two sides is measured, and the change curves of efficiency and loss along with flow and slip are obtained;
b. the temperature rise of the intelligent speed-regulating electromagnetic coupling 6 changes with the flow and the slip rate;
the temperature sensor 7 is used for measuring the change of temperature, the first rotary encoder 13-1 and the second rotary encoder 13-2 on the two sides are used for measuring the rotating speeds on the two sides, so that the slip ratio is obtained, the flow meter 10 is used for measuring the flow, and therefore a characteristic curve of the temperature rise of the intelligent speed-regulating electromagnetic coupling 6 along with the change of the slip ratio and the flow is drawn;
c. the efficiency and power factor of the whole system change with slip and flow;
drawing a variation curve of consumed power along with flow and a variation curve of power factor along with flow through data measured by a power meter 4; calculating effective output power according to the data measured by the flowmeter 10, and further obtaining a change curve of the efficiency of the whole system along with the flow; obtaining a change curve of the power factor along with the flow from the power meter 4;
finally, the curves obtained by using the throttle valve 9 and the intelligent speed-regulating electromagnetic coupler 6 are compared, namely the energy-saving effect of the intelligent speed-regulating electromagnetic coupler 6 is good and bad, and the intelligent speed-regulating electromagnetic coupler 6 can be compared with other couplers.
Claims (5)
1. The utility model provides an electromagnetic type shaft coupling comprehensive properties testboard which characterized by: the intelligent speed-regulating water-saving water dispenser comprises a rotary induction motor (1), a power meter (4), an intelligent speed-regulating electromagnetic coupling (6), a temperature sensor (7), a water pump (8), a throttle valve (9), a flowmeter (10) and a water bucket (5);
the intelligent speed-regulating electromagnetic coupling (6) comprises an excitation rotor (6-1) and a squirrel cage rotor (6-2), wherein the excitation rotor (6-1) is in clearance fit with the squirrel cage rotor (6-2), a fixed shaft (11) is fixed on the excitation rotor (6-1), and a telescopic shaft (12) is fixed on the squirrel cage rotor (6-2);
a power output shaft of the rotary induction motor (1) is fixedly connected with a fixed shaft (11), and a telescopic shaft (12) is fixedly connected with a water pump rotating shaft in a water pump (8);
a first rotary encoder (13-1) and a first torque sensor (14-1) are mounted on the fixed shaft (11), and a second rotary encoder (13-2) and a second torque sensor (14-2) are arranged on the telescopic shaft (12);
the first rotary encoder (13-1) is used for measuring the rotating speed of an excitation rotor (6-1) of the intelligent speed-regulating electromagnetic coupling (6), and the second rotary encoder (13-2) is used for measuring the rotating speed of a squirrel cage rotor (6-2) of the intelligent speed-regulating electromagnetic coupling (6); the first torque inductor (14-1) is used for measuring the torque of an excitation rotor (6-1) of the intelligent speed-regulating electromagnetic coupling (6), and the second torque inductor (14-2) is used for measuring the torque of a squirrel-cage rotor (6-2) of the intelligent speed-regulating electromagnetic coupling (6);
the power meter (4) is arranged on the rotary induction motor (1) and is used for measuring the apparent power and the active power of the rotary induction motor (1);
the temperature sensor (7) is arranged on the intelligent speed-regulating electromagnetic coupling (6) and is used for measuring the temperature rise of the intelligent speed-regulating electromagnetic coupling (6);
the water pump (8) is arranged on the load side of the intelligent speed-regulating electromagnetic coupling (6) and is used for bearing a load, and a water pump rotating shaft in the water pump (8) is fixedly connected with the telescopic shaft (12);
a water pump water inlet of the water pump (8) is communicated with a water barrel water outlet of the water barrel (5) through a first water pipe, and a water pump water outlet of the water pump (8) is communicated with a water barrel water inlet of the water barrel (5) through a second water pipe;
the throttle valve (9) is arranged at the water outlet of the water pump (8); the flowmeter (10) is mounted on the second water pipe.
2. The electromagnetic coupling comprehensive performance test bench according to claim 1, characterized in that: the first torque sensor (14-1) is arranged between the first rotary encoder (13-1) and the intelligent speed regulation electromagnetic coupling (6).
3. The electromagnetic coupling comprehensive performance test bench according to claim 1, characterized in that: the second rotary encoder (13-2) is arranged between the second torque sensor (14-2) and the intelligent speed regulation electromagnetic coupling (6).
4. The electromagnetic coupling comprehensive performance test bench according to claim 1, characterized in that: a water inlet of the bucket (5) is positioned at the top of the bucket (5), and a water outlet of the bucket is positioned on the side edge of the lower part of the bucket (5); the flowmeter (10) is arranged at one end close to the water inlet of the water barrel (5).
5. The method for testing the comprehensive performance of the electromagnetic coupling according to any one of claims 1 to 4, wherein the method comprises the following steps:
1) the flow is regulated by a throttle valve (9);
the intelligent speed regulation electromagnetic coupling (6) is locked, at the moment, the intelligent speed regulation electromagnetic coupling (6) only plays a role of mechanical connection, the throttle valve (9) is adjusted to change the flow from 0 to a rated flow speed, and a change curve of consumed power along with the flow and a change curve of power factor along with the flow are drawn through data measured by the power meter (4); calculating effective output power according to data measured by the flowmeter (10), and further obtaining a change curve of the efficiency of the whole system along with the flow;
2) the intelligent speed-regulating electromagnetic coupling (6) is used for regulating the flow;
the throttle valve (9) is completely opened, and the flow is regulated through the intelligent speed regulation electromagnetic coupling (6); the slip ratio of the excitation rotor (6-1) and the squirrel cage rotor (6-2) is adjusted by adjusting the telescopic shaft (12), so that the flow is adjusted; firstly, the coupling area of the excitation rotor (6-1) and the squirrel-cage rotor (6-2) is adjusted to be small, the speed of the squirrel-cage rotor (6-2) is 0, and then the coupling area of the excitation rotor (6-1) and the squirrel-cage rotor (6-2) is slowly increased until the flow reaches the rated flow;
3) collecting data;
a. the efficiency and the loss of the intelligent speed-regulating electromagnetic coupling (6) change along with the flow and the slip;
the rotating speed of the intelligent speed-regulating electromagnetic coupling (6) is measured through a first rotary encoder (13-1) and a second rotary encoder (13-2) on two sides of the intelligent speed-regulating electromagnetic coupling (6), the torque on two sides is measured through a first torque inductor (14-1) and a second torque inductor (14-2) on two sides, the input and output power on two sides is measured, and the change curves of efficiency and loss along with flow and slip are obtained;
b. the temperature rise of the intelligent speed-regulating electromagnetic coupling (6) changes along with the flow and the slip rate;
the temperature change is measured by a temperature sensor (7), the rotating speeds of two sides are measured by a first rotary encoder (13-1) and a second rotary encoder (13-2) of the two sides, the slip ratio is further obtained, the flow can be measured by a flowmeter (10), and therefore a characteristic curve of the temperature rise of the intelligent speed-regulating electromagnetic coupling (6) along with the slip ratio and the flow change is drawn;
c. the efficiency and power factor of the whole system change with slip and flow;
drawing a variation curve of consumed power along with flow and a variation curve of power factor along with flow through data measured by a power meter (4); calculating effective output power according to data measured by the flowmeter (10), and further obtaining a change curve of the efficiency of the whole system along with the flow; obtaining a change curve of the power factor along with the flow from the power meter (4);
and finally, the curves obtained by using the throttle valve (9) and the intelligent speed-regulating electromagnetic coupler (6) are compared, namely the energy-saving effect of the intelligent speed-regulating electromagnetic coupler (6) is good or bad, and the intelligent speed-regulating electromagnetic coupler (6) can be compared with other couplers.
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