CN214150886U - Coal mining machine frequency converter drag-pair loading experimental equipment - Google Patents
Coal mining machine frequency converter drag-pair loading experimental equipment Download PDFInfo
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- CN214150886U CN214150886U CN202022343280.XU CN202022343280U CN214150886U CN 214150886 U CN214150886 U CN 214150886U CN 202022343280 U CN202022343280 U CN 202022343280U CN 214150886 U CN214150886 U CN 214150886U
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Abstract
The utility model relates to a coal mining machine frequency converter drag loading experimental device, which comprises a main motor drag loading experimental device and a slave motor drag loading experimental device, wherein the main motor drag loading experimental device comprises a main tested motor, a main accompanying motor, a main tested frequency converter and a main accompanying frequency converter which are respectively used for driving the main tested motor and the main accompanying motor, the output shafts of the main tested motor and the main accompanying motor are coaxially and fixedly connected, the slave motor drag loading experimental device comprises a slave tested motor, the auxiliary test motor and the auxiliary test frequency converter which are respectively used for driving the auxiliary test motor and the auxiliary test motor are coaxially and fixedly connected with the output shaft of the auxiliary test motor and the auxiliary test motor, the main test motor and the output shaft of the auxiliary test motor are connected through a chain wheel and a chain, and the main test frequency converter and the auxiliary test frequency converter are controlled by torque. The utility model discloses can realize principal and subordinate capability test, can reflect the coal-winning machine more really and pull the on-the-spot operating mode condition of debug system.
Description
Technical Field
The utility model relates to an experimental facilities to coal-winning machine converter is applicable to type experiments such as motor loading, principal and subordinate load regulation of mining coal-winning machine converter.
Background
In recent years, the technology of coal mining machines is rapidly developed, and in general, "frequency conversion + motor dragging" is still the only mainstream traction mode on the coal mining machines. The traction speed regulation system of the coal mining machine usually adopts a one-to-one mode, namely two frequency converters respectively drag two traction motors, and the two frequency converters are respectively arranged as a host and a slave.
At present, the main experimental means for the frequency converter of the coal mining machine is still drag loading, namely, the output shaft of the tested motor is in hard connection with the output shaft of the accompanying motor, and the accompanying frequency converter is designed to be controlled by torque and serves as the load of the tested motor. The existing coal mining machine frequency converter loading experimental equipment can only load a single tested motor or respectively and independently load two tested motors, and cannot realize the coupling between the loads of a master tested motor and a slave tested motor, so that the master-slave regulation performance of the master tested motor and the slave tested motor cannot be tested, and the actual load condition of a coal mining machine traction motor cannot be simulated. Specifically speaking, the method comprises the following steps: during loading, if a load is applied to a single motor, the rotating speed difference of the two motors is always in the maximum value of the speed window and cannot be adjusted to be in speed balance; if loads are applied to the two motors at the same time, once the speed fluctuates, the speed enters the limit value of the speed window, and the actual change condition of load adjustment of the two motors cannot be reflected, so that the loading experiment and the master-slave performance test of the two tested motors cannot be performed at the same time.
In addition, a two-quadrant frequency converter is generally adopted in a frequency converter in the existing experimental equipment, feedback energy is consumed through a brake resistor, and energy is not saved enough.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a coal-winning machine converter is to dragging loading experimental facilities can simulate two traction motor's of coal-winning machine load balance state, realizes that the owner is tried the motor and is followed the principal and subordinate load balance capability test of being tried the motor, reflects the on-the-spot operating mode condition that the coal-winning machine pulls the debug system more truly, improves the credibility of experimental result.
The utility model discloses a main technical scheme has:
a coal cutter frequency converter drag loading experiment device comprises a main motor drag loading experiment device and a slave motor drag loading experiment device, wherein the main motor drag loading experiment device comprises a main tested motor, a main accompanying motor, a main tested frequency converter and a main accompanying frequency converter which are respectively used for driving the main tested motor and the main accompanying motor, output shafts of the main tested motor and the main accompanying motor are coaxially and fixedly connected, the slave motor drag loading experiment device comprises a slave tested motor, a slave accompanying motor, a slave tested frequency converter and a slave accompanying frequency converter which are respectively used for driving the slave tested motor and the slave accompanying motor, output shafts of the slave tested motor and the slave accompanying motor are coaxially and fixedly connected, output shafts of the main tested motor and the slave tested motor are connected through a chain wheel and a chain, and the main accompanying frequency converter and the slave accompanying frequency converter are controlled by torque, the input end of each frequency converter is connected to the power grid through a high-voltage fuse.
The output shafts of the main tested motor and the main test accompanying motor are fixedly connected through a main coupler, the output shafts of the auxiliary tested motor and the auxiliary test accompanying motor are fixedly connected through an auxiliary coupler, a main chain wheel and an auxiliary chain wheel are respectively and coaxially and fixedly installed on the main coupler and the auxiliary coupler, and the chain is wrapped on the main chain wheel and the auxiliary chain wheel and is meshed with the main chain wheel and the auxiliary chain wheel simultaneously.
The coal mining machine frequency converter drag-loading experimental equipment further comprises a main motor torque sensor and a slave motor torque sensor, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to an output shaft of a main tested motor and an output shaft of a slave tested motor respectively.
The accuracy grade of the master motor torque sensor and the slave motor torque sensor is not less than 0.1.
The maximum rotation speed of the master motor torque sensor and the slave motor torque sensor is 30000 rpm.
The main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base to form a testing platform, and the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table.
The control device is characterized in that the operating platform is further provided with a control device and an operating button, the control device controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two buses respectively, and the output end of the operating button is connected with the input end of the control device.
The operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button.
The main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter preferably adopt four-quadrant frequency converters, and rectification and inversion modules in the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt IGBTs.
The utility model has the advantages that:
the utility model discloses an increase the hard joint coupling between main, from being tried the motor, make corresponding to dragging load experimental facilities can simulate the operating mode experiment to two traction motor's load balance, can carry out the main principal and subordinate load balance capability test who is tried the motor and is followed from being tried the motor. As the field working condition of the traction speed regulation system of the coal mining machine can be simulated to the maximum extent, the test result has more convincing, credibility and referential significance.
The master accompanying and testing frequency converter and the slave accompanying and testing frequency converter adopt four-quadrant frequency converters, and the rectification and inversion modules adopt IGBTs (insulated gate bipolar transistors), so that energy can be fed back to a power grid in a feedback state, and more energy is saved.
Drawings
FIG. 1 is a schematic block diagram of the present invention;
FIG. 2 is a layout view of one embodiment of a test platform of the present invention;
fig. 3 is a layout diagram of an embodiment of the present invention.
Reference numerals:
1. a main tested motor; 2. from the machine under test; 3. a main accompanying motor; 4. a slave motor tester; 5. a main tested frequency converter; 6. from the frequency converter under test; 7. a master accompanying and testing frequency converter; 8. a slave trial frequency converter; 9. a main motor torque sensor; 10. a slave motor torque sensor; 11. a chain; 12. a high voltage fuse; 13. a laboratory bench base; 14. an operation table; 15. a main sprocket; 16. a slave sprocket; a control device; 18. an operation button; 19. and (4) an upper computer.
Detailed Description
The utility model discloses a coal-winning machine converter is to dragging loading experimental facilities (can be abbreviated as experimental facilities), as shown in fig. 1-3, including main motor to dragging loading experimental apparatus and from the motor to dragging loading experimental apparatus. The main motor counter-dragging loading experimental device comprises a main tested motor 1, a main accompanying motor 3, a main tested frequency converter 5 and a main accompanying frequency converter 7, wherein the main tested frequency converter 5 and the main accompanying frequency converter are respectively used for driving the main tested motor and the main accompanying motor. And the output shafts of the main tested motor and the main test-accompanying motor are coaxially and fixedly connected. The auxiliary motor counter-pulling loading experimental device comprises an auxiliary tested motor 2, an auxiliary accompanying motor 4, and an auxiliary tested frequency converter 6 and an auxiliary accompanying frequency converter 8 which are respectively used for driving the auxiliary tested motor and the auxiliary accompanying motor. And the output shafts of the slave tested motor and the slave accompanying motor are coaxially and fixedly connected. The output shafts of the main and slave electric motors under test 1 and 2 are connected by a sprocket and a chain 11. The utility model discloses except can carrying out the loading, principal and subordinate control and remote control experiment, owing to utilized the sprocket, the chain is connected main by the motor of being tested and is followed by the motor of being tested, consequently, can also realize the simulation to the load coupling characteristic between the principal and subordinate motor, when main motor is to dragging loading experimental apparatus and is experimenting from the motor to dragging loading experimental apparatus simultaneously, but furthest simulation coal-winning machine pulls the on-the-spot operating mode condition of speed governing system, can carry out main by the converter of being tested and from the principal and subordinate capability test between the converter of being tested (can be abbreviated as principal and subordinate capability test), make the true operating mode that the test result more can reflect coal-winning machine converter work, have more convincing power, credibility and referential meaning. Each frequency converter is connected to the power grid through a high-voltage fuse 12, which is used for protecting the frequency converter. Several frequency converters may share a single high voltage fuse.
The main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are controlled by torque, are used for simulating the loads of a main tested motor and an auxiliary tested motor, are usually in a remote control state, are controlled by an operating console, and can realize direction switching so as to enable the tested motors to be in a loading state and a feedback state. The tested frequency converter can respectively realize remote and near control, start and stop, speed increase and decrease and direction switching. The utility model discloses can be used to detect the performance and the working condition of two converter under test, can accomplish the area load and the communication test of main converter under test, from the area load and the communication test of converter under test, main converter under test and from communication and control test, principal and subordinate capability test between the converter under test etc. When other tests than the master-slave performance test are performed, including the loading characteristics, remote control, and the like, the experiment can be performed without connecting the chain. Each motor can be controlled individually.
Further, the output shafts of the main tested motor and the main test-assistant motor are preferably fixedly connected through a main coupler, the output shafts of the slave tested motor and the slave test-assistant motor are preferably fixedly connected through a slave coupler, a main chain wheel 15 and a slave chain wheel 16 are respectively and coaxially and fixedly installed on the main coupler and the slave coupler, and the chain 11 is wound on the main chain wheel and the slave chain wheel and is meshed with the main chain wheel and the slave chain wheel simultaneously, so that the output shafts of the main tested motor 1 and the slave tested motor 2 are connected through the chain wheels and the chain 11.
The coal mining machine frequency converter drag-loading experimental equipment further comprises a main motor torque sensor 9 and a slave motor torque sensor 10, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to an output shaft of a main tested motor and an output shaft of a slave tested motor respectively and are used for detecting the actual load and the change conditions of the load on the output shafts of the main tested motor and the slave tested motor in real time.
The rotating speed of the main motor torque sensor and the auxiliary motor torque sensor can reach 30000rpm, and the precision level is not less than 0.1.
The main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base 13 to form a test platform, the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table 14, the experiment table base and the operation table are independent, and only the main accompanying and testing motor and the auxiliary accompanying and testing frequency converter are electrically connected with each other. The operation panel is usually arranged indoors, and is convenient for an operator to operate remotely. The master and slave frequency converters to be tested are usually placed in separate areas outside the test platform and the operation table.
The operation table is also provided with a control device (PLC)17 and an operation button 18, the control device respectively controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two paths of buses, specifically, control instructions and setting are sent to the two frequency converters, and status words and status data are received from the two frequency converters. The master accompanying frequency converter and the slave accompanying frequency converter can be given at the same time or separately. The output end of the operating button is connected with the input end of the control device and is used for controlling instructions and giving input.
The operating platform is further provided with an upper computer 19, and the upper computer is in two-way communication connection with the control device.
The operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button. The loading and feedback switching toggle button can simultaneously adjust the directions of the two motors, so that the main motor and the driven motor to be tested are switched between loading and feedback states. The first load torque setting knob and the second load torque setting knob are used for setting torque set values REF of the two accompanying frequency converters, and the set values can be adjusted from 0% to 100%.
Adopt experimental facilities carry out the process of loading test simultaneously to two tested motors as follows:
1) pressing a power supply starting button of a main test accompanying frequency converter, observing the steering of a main test accompanying motor, and confirming the steering of the motor;
2) pressing a power supply starting button of the slave accompanying and testing frequency converter, observing whether the steering directions of the master accompanying and testing motor and the slave accompanying and testing motor are the same, and if the steering directions are different, switching the rotating direction of the slave accompanying and testing motor;
setting the speed of a main tested frequency converter to be 1500rpm, pressing a power supply starting button of the main tested frequency converter, operating a main tested motor and a slave tested motor at the moment, observing the running directions of the two motors, and ensuring that the running directions of the main tested motor and the slave tested motor are opposite to the running directions of corresponding auxiliary tested motors;
3) pressing a first load starting button and a second load starting button, observing the operation of the master and slave accompanying and testing motors, and respectively loading the current of the master and slave accompanying and testing motors to the rated current through a first load torque setting knob and a second load torque setting knob;
4) and when the motor runs stably, reading the data of the master motor and the slave motor to be tested, and storing the data curve recorded by the upper computer. The master-slave regulation process is observed through a data curve recorded by the upper computer, the master-slave regulation performance of the master motor and the slave motor is tested, and the master-slave regulation performance can be reflected through testing indexes such as current unbalance degree of the master motor and the slave motor.
Adopt experimental facilities carry out the principal and subordinate capability test when, confirm earlier the chain with the normal engaged state of main, follow sprocket. During testing, no matter loading is carried out on a single tested motor or loading is carried out on a main tested motor and a slave tested motor simultaneously, the output shafts of the main tested motor and the slave tested motor are coupled through a chain and a chain wheel, and the two tested motors can be finally adjusted to be balanced in speed under normal conditions.
For any one of the coal mining machine frequency converter drag-pair loading experimental equipment, the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter preferably adopt four-quadrant frequency converters, the rectification and inversion modules adopt IGBTs, energy can flow in two directions, and the energy can be fed back to a power grid when the master accompanying and testing motor 3 and the slave accompanying and testing motor 4 are in a feedback state, so that more energy is saved. The main frequency converter to be tested and the auxiliary frequency converter to be tested can be two-quadrant frequency converters or four-quadrant frequency converters.
The utility model discloses can carry out the simulation test to coal-winning machine traction system, including the motor control of converter, principal and subordinate control and remote control's performance detection, can carry out the actual test to the operational characteristic parameter of converter product, can carry out the frequency conversion loading capability test of two converters simultaneously, can accomplish the principal and subordinate converter capability test who is applicable to coal-winning machine traction speed governing system, verify the reliability of product, have characteristics such as the function is comprehensive, convenient operation, energy-concerving and environment-protective.
Claims (10)
1. The utility model provides a coal-winning machine converter is to dragging loading experimental facilities which characterized in that: comprises a main motor counter-dragging loading experimental device and a slave motor counter-dragging loading experimental device, wherein the main motor counter-dragging loading experimental device comprises a main tested motor, a main accompanying motor, a main tested frequency converter and a main accompanying frequency converter which are respectively used for driving the main tested motor and the main accompanying motor, the output shafts of the main tested motor and the main accompanying motor are coaxially and fixedly connected, the auxiliary motor counter-pulling loading experiment device comprises an auxiliary tested motor, an auxiliary accompanying motor, an auxiliary tested frequency converter and an auxiliary accompanying frequency converter, wherein the auxiliary tested frequency converter and the auxiliary accompanying frequency converter are respectively used for driving the auxiliary tested motor and the auxiliary accompanying motor, the output shafts of the slave tested motor and the slave accompanying motor are coaxially and fixedly connected, the output shafts of the master tested motor and the slave tested motor are connected through a chain wheel and a chain, the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are controlled by torque, and the input end of each frequency converter is connected into a power grid through a high-voltage fuse.
2. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 1, characterized in that: the output shafts of the main tested motor and the main test accompanying motor are fixedly connected through a main coupler, the output shafts of the auxiliary tested motor and the auxiliary test accompanying motor are fixedly connected through an auxiliary coupler, a main chain wheel and an auxiliary chain wheel are respectively and coaxially and fixedly installed on the main coupler and the auxiliary coupler, and the chain is wrapped on the main chain wheel and the auxiliary chain wheel and is meshed with the main chain wheel and the auxiliary chain wheel simultaneously.
3. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 2, characterized in that: the device is characterized by further comprising a main motor torque sensor and a slave motor torque sensor, wherein the main motor torque sensor and the slave motor torque sensor are fixedly installed relative to the output shaft of the main tested motor and the output shaft of the slave tested motor respectively.
4. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 3, characterized in that: the accuracy grade of the master motor torque sensor and the slave motor torque sensor is not less than 0.1.
5. The coal mining machine frequency converter drag-pair loading experimental equipment as claimed in claim 3, characterized in that: the maximum rotation speed of the master motor torque sensor and the slave motor torque sensor is 30000 rpm.
6. The coal mining machine frequency converter twin-drag loading experiment equipment as claimed in claim 1, 2, 3, 4 or 5, wherein: the main tested motor, the main accompanying and testing motor, the auxiliary tested motor and the auxiliary accompanying and testing motor are fixed on the experiment table base to form a testing platform, the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter are installed on the operation table, and the experiment table base and the operation table are independent respectively.
7. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 6, characterized in that: the control device is characterized in that the operating platform is further provided with a control device and an operating button, the control device controls the master accompanying and testing frequency converter and the slave accompanying and testing frequency converter through two buses respectively, and the output end of the operating button is connected with the input end of the control device.
8. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 7, characterized in that: the operation buttons comprise a variable frequency power supply starting button, a variable frequency power supply stopping button, a load power supply starting button, a load power supply stopping button, a single and linkage mode switching button, a first load starting button, a first load stopping button, a second load starting button, a second load stopping button, a first load torque setting knob, a second load torque setting knob and a loading and feedback switching toggle button.
9. The coal mining machine frequency converter twin-drag loading experiment equipment as claimed in claim 1, 2, 3, 4 or 5, wherein: the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt four-quadrant frequency converters, and rectification and inversion modules in the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt IGBTs.
10. The coal mining machine frequency converter drag-pair loading experimental facility as claimed in claim 6, characterized in that: the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt four-quadrant frequency converters, and rectification and inversion modules in the main accompanying and testing frequency converter and the auxiliary accompanying and testing frequency converter adopt IGBTs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022343280.XU CN214150886U (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022343280.XU CN214150886U (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
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| Publication Number | Publication Date |
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| CN214150886U true CN214150886U (en) | 2021-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022343280.XU Active CN214150886U (en) | 2020-10-20 | 2020-10-20 | Coal mining machine frequency converter drag-pair loading experimental equipment |
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| CN (1) | CN214150886U (en) |
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- 2020-10-20 CN CN202022343280.XU patent/CN214150886U/en active Active
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