Electric control drive duplex loading test method for high-power coal mining machine
By designing a dual loading test system built by the electrical feedback loading test center in the coal mining machine and electrically controlled drive system, the problem of performance detection of the high-power coal mining machine and electrically controlled drive system is solved, and efficient and accurate acquisition of test data is achieved.
Patent Information
- Application Number
- CN202411770298.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-03-14
AI Technical Summary
The prior art cannot effectively meet the performance detection requirements of high-power coal mining machinery and electrically controlled drive systems, and the traditional test methods cannot meet the increase inverter power and traction motor power.
A high-power coal mining machine electrically controlled driving dual loading test method was designed. By building a dual loading test system based on the electrical feedback loading test center, the coal mining machine electrically controlled box, left traction part and right traction part are used as the subjects to realize dual loading tests of the electrical control system and the traction drive system.
It improves the test efficiency of the loading test of the coal miner, ensures the accuracy and comprehensiveness of the loading test data, can effectively simulate the working status of the coal miner, and provides a theoretical and practical basis.
Smart Images
Figure CN119618700A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of coal mining machine loading tests, and in particular relates to an electric-controlled drive double loading test method for a high-power coal mining machine. Background Art
[0002] The coal mining machine loading test is divided into the electric control system loading test and the traction drive system loading test. The two test processes are carried out in different test bases. Through these two loading tests, the relevant data of the tested inverters, transformers and other electrical components and gears, bearings and other mechanical parts can be reflected, including operating temperature, cooling effect, mechanical properties, motor performance, inverter speed regulation performance, sealing effect, etc. These test data can be used to check whether the design and installation meet the factory inspection requirements, clarify the improvement goals and directions, and improve product performance and quality. With the increase in product market share and the successful development of high-power coal mining machines, the inverter power and traction motor power are gradually increasing, and the traction motor current is gradually increasing. The traditional test methods using the electric control box loading test bench and the mechanical loading test center have gradually failed to meet the performance testing of such products. Therefore, a high-power coal mining machine electric control drive double loading test method should be provided. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a high-power coal mining machine electronically controlled drive double loading test method in view of the deficiencies in the above-mentioned prior art. The method has a reasonable design and constructs a coal mining machine electronically controlled drive double loading test system based on an electric feedback loading test center. The coal mining machine electrical control box, left traction unit and right traction unit are used as test pieces. The electrical control system loading test and the traction drive system loading test can be carried out simultaneously, thereby improving the test efficiency of the coal mining machine loading test and ensuring the accuracy and comprehensiveness of the loading test data.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-power coal mining machine electric control drive double loading test method, characterized in that: the test method comprises the following steps:
[0005] Step 1: No-load test of the left traction unit and the right traction unit;
[0006] Step 2: Construct a coal mining machine electronically controlled drive dual loading test system:
[0007] Step 201, hoisting the electric control box of the coal mining machine, the left traction unit and the right traction unit on the working platform of the electric feedback loading test center in sequence, and connecting the planetary reducer of the left traction unit with the planetary reducer of the right traction unit through a spline shaft;
[0008] Step 202, connecting the power cable of the power distribution cabinet of the electric feedback loading test center to the main incoming line terminal of the electric control box of the coal mining machine, and the power supply in the power distribution cabinet supplies power to the electric control box of the coal mining machine;
[0009] Step 203, connecting the first motor of the left traction unit to the loading frequency converter in the electrical control box of the coal mining machine through a cable, and connecting the second motor of the right traction unit to the load frequency converter in the electrical control cabinet of the electrical feedback loading test center through a cable;
[0010] Step 204: Temperature sensors are arranged on the output shaft of the first motor, the output shaft of the second motor, and the load frequency converter, and the temperature changes of the output shaft of the first motor, the output shaft of the second motor, and the load frequency converter are monitored in real time using a plurality of temperature sensors, and the monitoring results are fed back to the controller of the electrical feedback loading test center;
[0011] Step 3: Debugging of the shearer electric control drive double loading test system;
[0012] Step 4: Using the left traction unit as the loading mechanism and the right traction unit as the load mechanism, the first electric control drive double loading of the coal mining machine is performed;
[0013] Step 5: After the temperature of each component returns to normal temperature, rebuild the coal mining machine electronic control drive double loading test system:
[0014] Connect the first motor of the left traction unit to the load frequency converter in the electrical control cabinet of the electric feedback loading test center through a cable, and connect the second motor of the right traction unit to the load frequency converter in the electrical control box of the coal mining machine through a cable;
[0015] Step six: Use the left traction part as the load mechanism and the right traction part as the loading mechanism to carry out the second electric-controlled double loading of the coal mining machine.
[0016] The above-mentioned high-power coal mining machine electronically controlled drive double loading test method is characterized in that: in step 4, the transformer inside the coal mining machine electrical control box can adjust the power supply voltage to the voltage required by the second motor, the loading frequency converter controls the power supply frequency and voltage of the first motor, adjusts the speed of the first motor, and the load frequency converter controls the power supply frequency and voltage of the second motor, adjusts the torque of the second motor, and the process of the first loading of the coal mining machine electronically controlled drive double is:
[0017] Step 401, operate the second motor at 50% of the rated power, and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part and the right traction part operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 402;
[0018] Step 402: operate the second motor at 70% of the rated power, observe for 5 minutes, if the system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part and the right traction part operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, then execute step 403;
[0019] Step 403, operate the second motor at 100% rated power, detect the temperature changes of the output shaft of the first motor, the output shaft of the second motor and the load inverter in real time, record relevant information, and obtain the thermal balance characteristic test data of the coal mining machine electrical control box, the left traction unit and the right traction unit.
[0020] The above-mentioned high-power coal mining machine electronically controlled drive double loading test method is characterized in that: in step six, the transformer inside the coal mining machine electronic control box can adjust the power supply voltage to the voltage required by the first motor, the loading frequency converter controls the power supply frequency and voltage of the second motor, adjusts the speed of the second motor, and the load frequency converter controls the power supply frequency and voltage of the first motor, adjusts the torque of the first motor, and the process of the second loading of the coal mining machine electronically controlled drive double is:
[0021] Step 601, operate the first motor at 50% power and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part and the right traction part operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 602;
[0022] Step 602: The first motor is operated at 70% power. After 5 minutes of observation, if the system operates smoothly without abnormal noise, vibration or abnormal temperature rise, the gears and bearings included in the left traction part and the right traction part operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, then step 603 is executed;
[0023] Step 603, operate the first motor at 100% power, detect the temperature changes of the output shafts of the first motor and the second motor in real time, record relevant information, and obtain thermal balance characteristic test data of the load inverter.
[0024] The above-mentioned high-power coal mining machine electronically controlled double-loading test method is characterized in that: in step 201, a plurality of first support piers are supported below the electrical control box of the coal mining machine, and second support piers are supported below the left traction part and below the right traction part. The left traction part is fixedly installed on the working platform by a first support clamping fixture, and the right traction part is fixedly installed on the working platform by a second support clamping fixture.
[0025] The above-mentioned high-power coal mining machine electronically controlled double loading test method is characterized in that: the structure of the first supporting and clamping fixture is the same as the structure of the second supporting and clamping fixture, and the first supporting and clamping fixture and the second supporting and clamping fixture both include two symmetrically arranged support frames and support rods horizontally installed on the top ends of the two support frames, and the support rods are inserted into the mounting holes of the left traction part or the right traction part.
[0026] The above-mentioned high-power coal mining machine electronically controlled double-loading test method is characterized in that: the support frame includes a support seat, a support plate installed on the top of the support seat and a clamping plate installed on the top of the support plate, and semicircular grooves are provided on the top surface of the support plate and the bottom surface of the clamping plate, and the two semicircular grooves are buckled to form a circular mounting hole matching the support rod.
[0027] Compared with the prior art, the present invention has the following advantages:
[0028] 1. In this embodiment of the present invention, a coal mining machine electronically controlled drive dual loading test system is constructed by relying on an electric feedback loading test center as the main body, the coal mining machine electrical control box, the left traction unit and the right traction unit are used as test pieces, and the planetary reducer of the left traction unit is connected to the planetary reducer of the right traction unit through a spline shaft; the power cable of the power distribution cabinet of the electric feedback loading test center is connected to the main incoming line terminal of the coal mining machine electrical control box, and the power supply in the power distribution cabinet supplies power to the coal mining machine electrical control box; when the first motor of the left traction unit is connected to the loading frequency converter in the coal mining machine electrical control box through a cable, and the second motor of the right traction unit is connected to the load frequency converter in the electrical control cabinet of the electric feedback loading test center through a cable, It is possible to carry out the first electric-controlled dual loading test of the coal mining machine with the left traction part as the loading mechanism and the right traction part as the load mechanism; when the first motor of the left traction part is connected to the load inverter in the electrical control cabinet of the electric feedback loading test center through a cable, and the second motor of the right traction part is connected to the loading inverter in the electrical control box of the coal mining machine through a cable, it is possible to carry out the second electric-controlled dual loading test of the coal mining machine with the left traction part as the load mechanism and the right traction part as the loading mechanism, which can meet the active and driven traction relationship between the left traction part and the right traction part of the high-power coal mining machine during the reciprocating operation of the coal mining process, and ensure the comprehensiveness of the loading test data.
[0029] 2. The present invention utilizes the coal mining machine electronically controlled drive dual loading test system to simultaneously perform electronic control system loading tests and traction drive system loading tests, thereby improving the test efficiency of the coal mining machine loading test. It can not only ensure the accuracy of the loading test data, but also effectively simulate the working state of the coal mining machine, making the feedback test data closer to reality, and can provide a theoretical and practical basis for the test of high-power coal mining machines.
[0030] 3. The test method of the present invention is reasonably designed, has a short test process, is simple and easy to operate, and is easy to promote and apply.
[0031] To summarize, the present invention constructs a coal mining machine electronically controlled drive dual loading test system based on an electric feedback loading test center as the main body, with the coal mining machine's electrical control box, left traction unit and right traction unit as test pieces. It can simultaneously carry out an electronic control system loading test and a traction drive system loading test, thereby improving the test efficiency of the coal mining machine loading test and ensuring the accuracy and comprehensiveness of the loading test data.
[0032] The present invention is further described in detail below through the accompanying drawings and examples. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 Flow chart of the test method of the present invention.
[0034] Figure 2 It is a structural schematic diagram of the present invention.
[0035] Figure 3 for Figure 1 Top view of the .
[0036] Figure 4 for Figure 1 AA section view.
[0037] Figure 5 It is a schematic structural diagram of the first supporting and clamping tool (second supporting and clamping tool) of the present invention.
[0038] Description of reference numerals:
[0039] 1-1—Working platform; 1-2—Power distribution cabinet; 1-3—Electrical control cabinet; 2—Electric control box; 3—left traction unit; 4—right traction unit; 5—Spline shaft; 7—first supporting pier; 8—Second supporting pier; 9-1—Support seat; 9-2—Support plate; 9-3—Compression plate; 10—Support rod. DETAILED DESCRIPTION
[0040] like Figure 1 , Figure 2 and Figure 3 A high-power coal mining machine electric control drive double loading test method is shown, and the test method includes the following steps:
[0041] Step 1: no-load test of the left traction part 3 and the right traction part 4;
[0042] Step 2: Construct a coal mining machine electronically controlled drive dual loading test system:
[0043] Step 201, hoist the coal mining machine electric control box 2, the left traction part 3 and the right traction part 4 in sequence on the working platform 1-1 of the electric feedback loading test center, and connect the planetary reducer of the left traction part 3 with the planetary reducer of the right traction part 4 through the spline shaft 5;
[0044] Step 202, connecting the power cable of the power distribution cabinet 1-2 of the electric feedback loading test center to the main incoming line terminal of the coal mining machine electric control box 2, and the power supply in the power distribution cabinet 1-2 supplies power to the coal mining machine electric control box 2;
[0045] Step 203, connecting the first motor 3-1 of the left traction part 3 to the loading frequency converter in the electric control box 2 of the coal mining machine through a cable, and connecting the second motor 4-1 of the right traction part 4 to the load frequency converter in the electric control cabinet 1-3 of the electric feedback loading test center through a cable;
[0046] Step 204, temperature sensors are arranged on the output shaft of the first motor 3-1, the output shaft of the second motor 4-1 and the load frequency converter, and the temperature changes of the output shaft of the first motor 3-1, the output shaft of the second motor 4-1 and the load frequency converter are monitored in real time by using multiple temperature sensors, and the monitoring results are fed back to the controller of the electric feedback loading test center;
[0047] Step 3: Debugging of the shearer electric control drive double loading test system;
[0048] Step 4: Using the left traction unit 3 as a loading mechanism and the right traction unit 4 as a load mechanism, the first electric control drive double loading of the coal mining machine is performed;
[0049] Step 5: After the temperature of each component returns to normal temperature, rebuild the coal mining machine electronic control drive double loading test system:
[0050] Connect the first motor 3-1 of the left traction part 3 to the load frequency converter in the electrical control cabinet 1-3 of the electric feedback loading test center through a cable, and connect the second motor 4-1 of the right traction part 4 to the load frequency converter in the electrical control box 2 of the coal mining machine through a cable;
[0051] Step six: Use the left traction part 3 as the load mechanism and the right traction part 4 as the loading mechanism to perform the second electrical control drive double loading of the coal mining machine.
[0052] In this embodiment, a coal mining machine electronically controlled drive dual loading test system is constructed by relying on an electric feedback loading test center as the main body, the coal mining machine electrical control box 2, the left traction part 3 and the right traction part 4 are used as test pieces, and the planetary reducer of the left traction part 3 is connected to the planetary reducer of the right traction part 4 through a spline shaft 5; the power cable of the power distribution cabinet 1-2 of the electric feedback loading test center is connected to the main incoming line end of the coal mining machine electrical control box 2, and the power supply in the power distribution cabinet 1-2 supplies power to the coal mining machine electrical control box 2; when the first motor 3-1 of the left traction part 3 is connected to the loading frequency converter in the coal mining machine electrical control box 2 through a cable, and the second motor 4-1 of the right traction part 4 is connected to the load frequency converter in the electrical control cabinet 1-3 of the electric feedback loading test center through a cable, it is possible to realize the first coal mining machine electronically controlled drive dual loading test with the left traction part 3 as the loading mechanism and the right traction part 4 as the load mechanism; when the first motor 3-1 of the left traction part 3 is connected to The load frequency converter in the electrical control cabinet 1-3 of the electric feedback loading test center is connected by a cable. When the second motor 4-1 of the right traction part 4 is connected to the loading frequency converter in the electrical control box 2 of the coal mining machine by a cable, the left traction part 3 can be used as the load mechanism and the right traction part 4 can be used as the loading mechanism to carry out a second coal mining machine electronically controlled drive double loading test. This can meet the active and driven traction relationship between the left traction part 3 and the right traction part 4 of the high-power coal mining machine during the reciprocating operation of the coal mining process, ensure the comprehensiveness of the loading test data, and use the coal mining machine electronically controlled drive double loading test system to simultaneously carry out the electric control system loading test and the traction drive system loading test, thereby improving the test efficiency of the coal mining machine loading test. This can not only ensure the accuracy of the loading test data, but also effectively simulate the working state of the coal mining machine, so that the feedback test data is closer to reality, and can provide a theoretical and practical basis for the test of high-power coal mining machines.
[0053] In this embodiment, the transformer 12 inside the electric control box 2 of the coal mining machine can adjust the power supply voltage to the voltage required by the second motor 4-1, and the loading frequency converter controls the power supply frequency and voltage of the first motor 3-1 to adjust the speed of the first motor 3-1. The load frequency converter controls the power supply frequency and voltage of the second motor 4-1 to adjust the torque of the second motor 4-1. The process of the first loading of the electric control drive double of the coal mining machine is as follows:
[0054] Step 401, operate the second motor 4-1 at 50% of the rated power, and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part 3 and the right traction part 4 operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 402;
[0055] Step 402: operate the second motor 4-1 at 70% of the rated power, observe for 5 minutes, the system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part 3 and the right traction part 4 operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, then execute step 403;
[0056] Step 403, operate the second motor 4-1 at 100% rated power, detect the temperature changes of the output shaft of the first motor 3-1, the output shaft of the second motor 4-1 and the load inverter in real time, record relevant information, and obtain the thermal balance characteristic test data of the coal mining machine electrical control box 2, the left traction part 3 and the right traction part 4.
[0057] In this embodiment, the transformer 12 inside the electric control box 2 of the coal mining machine can adjust the power supply voltage to the voltage required by the first motor 3-1, and the power supply frequency and voltage of the second motor 4-1 are controlled by the loading inverter to adjust the speed of the second motor 4-1. The power supply frequency and voltage of the first motor 3-1 are controlled by the load inverter to adjust the torque of the first motor 3-1. The process of the second loading of the electric control drive double of the coal mining machine is as follows:
[0058] Step 601, operate the first motor 3-1 at 50% power and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part 3 and the right traction part 4 operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 402;
[0059] Step 602: Run the first motor 3-1 at 70% power and observe for 5 minutes. If the system runs smoothly without abnormal noise, vibration or abnormal temperature rise, the gears and bearings included in the left traction part 3 and the right traction part 4 run flexibly, are accurately positioned and reliable, and there is no leakage at the seal, then execute step 403;
[0060] Step 603, operate the first motor 3-1 at 100% power, detect the temperature changes of the output shaft of the first motor 3-1 and the output shaft of the second motor 4-1 in real time, record relevant information, and obtain thermal balance characteristic test data of the load inverter.
[0061] In this embodiment, in step 403, the second motor 4-1 is operated when the rated power reaches 100%, and the temperature changes and related information of the output shafts of the first motor 3-1 and the second motor 4-1 are recorded as shown in Table 1:
[0062] Table 1
[0063]
[0064]
[0065] In this embodiment, in step 603, the first motor 3-1 is operated when the power reaches 100%, and the temperature changes and related information of the output shaft of the first motor 3-1 and the output shaft of the second motor 4-1 are recorded as shown in Table 2:
[0066] Table 2
[0067]
[0068]
[0069]
[0070] In this embodiment, in step 603, the first motor 3-1 is operated when the power reaches 100%, and the temperature change record of the load inverter is as shown in Table 3:
[0071] Table 3
[0072]
[0073] like Figure 2 As shown, in this embodiment, in step 201, a plurality of first support piers 7 are supported below the electrical control box 2 of the coal mining machine, and second support piers 8 are supported below the left traction part 3 and below the right traction part 4. The left traction part 3 is fixedly installed on the working platform 1-1 by a first support clamping fixture, and the right traction part 4 is fixedly installed on the working platform 1-1 by a second support clamping fixture.
[0074] like Figure 3 , Figure 4 and Figure 5 As shown, in this embodiment, the structure of the first supporting and clamping tool is the same as the structure of the second supporting and clamping tool. The first supporting and clamping tool and the second supporting and clamping tool both include two symmetrically arranged support frames and a support rod 10 horizontally installed at the top of the two support frames. The support rod 10 is inserted into the mounting hole of the left traction part 3 or the right traction part 4.
[0075] In this embodiment, the support frame includes a support seat 9-1, a support plate 9-2 installed on the top of the support seat 9-1, and a clamping plate 9-3 installed on the top of the support plate 9-2. Semicircular grooves are provided on the top surface of the support plate 9-2 and the bottom surface of the clamping plate 9-3. The two semicircular grooves are buckled to form a circular mounting hole matching the support rod 10.
[0076] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A high-power coal mining machine electronically controlled drive double loading test method, characterized in that: The test method comprises the following steps: Step 1: no-load test of the left traction part (3) and the right traction part (4); Step 2: Construct a coal mining machine electronically controlled drive dual loading test system: Step 201, hoisting the coal mining machine electric control box (2), the left traction part (3) and the right traction part (4) on the working platform (1-1) of the electric feedback loading test center in sequence, and connecting the planetary reducer of the left traction part (3) and the planetary reducer of the right traction part (4) through a spline shaft (5); Step 202: Connect the power cable of the power distribution cabinet (1-2) of the electric feedback loading test center to the main incoming line terminal of the electric control box (2) of the coal mining machine, and use the power supply in the power distribution cabinet (1-2) to supply power to the electric control box (2) of the coal mining machine; Step 203, connecting the first motor (3-1) of the left traction part (3) to the loading frequency converter in the electrical control box (2) of the coal mining machine through a cable, and connecting the second motor (4-1) of the right traction part (4) to the load frequency converter in the electrical control cabinet (1-3) of the electrical feedback loading test center through a cable; Step 204: Temperature sensors are arranged on the output shaft of the first motor (3-1), the output shaft of the second motor (4-1), and the load frequency converter, and the temperature changes of the output shaft of the first motor (3-1), the output shaft of the second motor (4-1), and the load frequency converter are monitored in real time using the multiple temperature sensors, and the monitoring results are fed back to the controller of the electrical feedback loading test center; Step 3: Debugging of the shearer electric control drive double loading test system; Step 4: Using the left traction unit (3) as a loading mechanism and the right traction unit (4) as a load mechanism, the first electric control drive double loading of the coal mining machine is performed; Step 5: After the temperature of each component returns to normal temperature, rebuild the coal mining machine electronic control drive double loading test system: The first motor (3-1) of the left traction part (3) is connected to the load frequency converter in the electrical control cabinet (1-3) of the electrical feedback loading test center through a cable, and the second motor (4-1) of the right traction part (4) is connected to the load frequency converter in the electrical control box (2) of the coal mining machine through a cable; Step 6: Use the left traction unit (3) as the load mechanism and the right traction unit (4) as the loading mechanism to perform the second electric-controlled double loading of the coal mining machine.
2. A high-power coal mining machine electronically controlled drive double loading test method according to claim 1, characterized in that: In step 4, the transformer (12) inside the electric control box (2) of the coal mining machine can adjust the power supply voltage to the voltage required by the second motor (4-1), and the loading frequency converter controls the power supply frequency and voltage of the first motor (3-1) to adjust the speed of the first motor (3-1). The load frequency converter controls the power supply frequency and voltage of the second motor (4-1) to adjust the torque of the second motor (4-1). The process of the first loading of the electric control drive double of the coal mining machine is as follows: Step 401, operate the second motor (4-1) at 50% of the rated power, and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part (3) and the right traction part (4) operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 402; Step 402: operate the second motor (4-1) at 70% of the rated power, observe for 5 minutes, the system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part (3) and the right traction part (4) operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, then execute step 403; Step 403, operate the second motor (4-1) at 100% rated power, detect the temperature changes of the output shaft of the first motor (3-1), the output shaft of the second motor (4-1) and the load inverter in real time, record relevant information, and obtain the thermal balance characteristic test data of the coal mining machine electrical control box (2), the left traction part (3) and the right traction part (4).
3. A high-power coal mining machine electronically controlled drive double loading test method according to claim 1, characterized in that: In step six, the transformer (12) inside the electric control box (2) of the coal mining machine can adjust the power supply voltage to the voltage required by the first motor (3-1), and the loading frequency converter controls the power supply frequency and voltage of the second motor (4-1), and adjusts the speed of the second motor (4-1). The load frequency converter controls the power supply frequency and voltage of the first motor (3-1), and adjusts the torque of the first motor (3-1). The process of performing the second loading of the electric control drive double of the coal mining machine is as follows: Step 601, operate the first motor (3-1) at 50% power and observe for 5 minutes. When the test system operates smoothly without abnormal noise, vibration and abnormal temperature rise, the gears and bearings included in the left traction part (3) and the right traction part (4) operate flexibly, are accurately positioned and reliable, and there is no leakage at the seal, execute step 602; Step 602: The first motor (3-1) is operated at 70% power, and the system is observed for 5 minutes. If the system operates smoothly without abnormal noise, vibration, or abnormal temperature rise, the gears and bearings included in the left traction part (3) and the right traction part (4) operate flexibly, are accurately positioned, and are reliable, and there is no leakage at the seal, then step 603 is executed; Step 603, operate the first motor (3-1) at 100% power, detect the temperature changes of the output shaft of the first motor (3-1) and the output shaft of the second motor (4-1) in real time, record relevant information, and obtain thermal balance characteristic test data of the load inverter.
4. A high-power coal mining machine electronically controlled drive double loading test method according to claim 1, characterized in that: In step 201, a plurality of first support piers (7) are provided below the electrical control box (2) of the coal mining machine, and second support piers (8) are provided below the left traction part (3) and below the right traction part (4). The left traction part (3) is fixedly mounted on the working platform (1-1) by means of a first support clamping fixture, and the right traction part (4) is fixedly mounted on the working platform (1-1) by means of a second support clamping fixture.
5. A high-power coal mining machine electronically controlled drive double loading test method according to claim 4, characterized in that: The structure of the first supporting and clamping tool is the same as that of the second supporting and clamping tool. Both the first supporting and clamping tool and the second supporting and clamping tool comprise two symmetrically arranged support frames and a support rod (10) horizontally installed at the top ends of the two support frames. The support rod (10) is inserted into a mounting hole of the left traction part (3) or the right traction part (4).
6. A high-power coal mining machine electronically controlled drive double loading test method according to claim 5, characterized in that: The support frame comprises a support seat (9-1), a support plate (9-2) mounted on the top of the support seat (9-1), and a clamping plate (9-3) mounted on the top of the support plate (9-2), and a semicircular groove is provided on the top surface of the support plate (9-2) and the bottom surface of the clamping plate (9-3), and the two semicircular grooves are buckled to form a circular mounting hole matching the support rod (10).