Loading test system

Abstract

The invention relates to a loading test system. The loading test system is used for carrying out performance tests on a cutting part, a traction part and a complete machine part of the coal mining machine, the cutting part, the traction part and the complete machine part are tested pieces, and the loading test system comprises a power supply and distribution system, a loading system, a control and data processing system and a software system. The power supply and distribution system is used for providing required voltage grades for the loading test system and a tested piece, the loading system is used for simulating the load of the coal mining machine under actual working conditions, and the control and data processing system is used for collecting and processing test parameters of the loading test system and the tested piece. And the software system is used for displaying operation parameters of the loading test system in real time. According to the loading test system, loading tests can be carried out according to test environments needing to be simulated by coal mining machines of different models, meanwhile, the power range of tested pieces is met, and power supply voltage control of different tested pieces is met.

Description

Technical Field

[0001] The present invention relates to the field of detection systems; more specifically, the present invention relates to a loading test system. Background Art

[0002] With the continuous advancement of coal mining machine technology, there has been great technological progress in the total installed power and types of coal mining machines that can cope with different coal mine environments. The existing coal mining machine detection and testing equipment may not meet the test technology requirements of existing coal mining machines. The cutting part of the coal mining machine is the working mechanism of the coal mining machine that directly cuts the coal wall. The cutting part is mainly composed of cutting motors, rocker arms, rollers and other components. The traction part of the coal mining machine is the walking mechanism of the coal mining machine. It is mainly responsible for the movement of the coal mining machine on the working surface. The traction part includes traction motors, traction reducers, walking wheels and other components. The cutting part and traction part are key components of the coal mining machine, and their power consumption accounts for more than 90% of the total power of the coal mining machine. Therefore, when the coal mining machine is inspected at the factory, the performance of the cutting part and the traction part is directly related to the quality of the whole machine. With the development of coal mining machines, it is necessary to develop a set of high-power loading test equipment to cope with the test equipment required for the continuous upgrading of coal mining machines. Summary of the invention

[0003] In view of this, the present invention provides a loading test system to solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0004] In order to achieve the above-mentioned object, a first aspect of the present invention provides a loading test system, which is used to perform performance tests on the cutting part, traction part and the whole machine part of the coal shearer, and is characterized in that the cutting part, traction part and the whole machine part of the coal shearer are test pieces, and the loading test system comprises: A power supply and distribution system, the power supply and distribution system is used to provide the required voltage level for the loading test system and the test piece; A loading system, the loading system is used to simulate the load condition of the coal mining machine under actual working conditions; A control and data processing system, the control and data processing system is used to collect and process test parameters of the loading test system and the test piece; and A software system is used to display the operating parameters of the loading test system in real time.

[0005] In the aforementioned loading test system, optionally, the cutting part is started by soft starting, and the traction part is started by direct starting.

[0006] In the aforementioned loading test system, optionally, the test parameter includes at least one of temperature, voltage, current and power.

[0007] In the aforementioned loading test system, optionally, the power supply and distribution system includes: A power input module, the power input module is used to connect the loading test system to an external power source; A power distribution cabinet, which is used for power distribution; a first transformer, the first transformer being connected to the power distribution cabinet and the cutting part and / or the whole machine part of the coal mining machine, and being used for supplying power to the cutting part and / or the whole machine part of the coal mining machine; a second transformer, the second transformer being connected to the power distribution cabinet and the loading frequency converter of the loading system and being used for supplying power to the loading frequency converter; A third transformer, wherein the third transformer is connected to the power distribution cabinet and the traction part of the coal mining machine, and is used to supply power to the traction part of the coal mining machine.

[0008] In the loading test system as described above, optionally, the power input module is a factory transformer with an input of 10000V, an output of 3300V, and an apparent power of 2000kVA, the first transformer is a dry-type rectifier transformer with an input of 3300V, an output of 1140V, and an apparent power of 1250kVA, the second transformer is a dry-type rectifier transformer with an input of 3300V, an output of 690V, and an apparent power of 1250kVA, and the third transformer is a dry-type rectifier transformer with an input of 3300V, an output of 600V or 460V, and an apparent power of 600kVA.

[0009] In the loading test system as described above, optionally, the loading system includes the loading frequency converter, the traction part loading system and the cutting part loading system.

[0010] In the loading test system as described above, optionally, the loading inverter is a four-quadrant loading inverter capable of switching voltage levels, the four-quadrant loading inverter is connected to the second transformer, and when the power gear of the four-quadrant loading inverter is switched to 500KW, the four-quadrant loading inverter is connected to the traction part loading system, and when the power gear of the four-quadrant loading inverter is switched to 1000KW, the four-quadrant loading inverter is connected to the cutting part loading system.

[0011] In the loading test system as described above, optionally, the traction part loading system includes a first test reducer, a first torque meter, a first loading motor, and a traction part on-site junction box connected in sequence, the first test reducer is connected to the traction part of the tested coal mining machine, the traction part on-site junction box is connected to the four-quadrant loading inverter, the power of the first test reducer is 300KW, and the power of the first loading motor is 315KW.

[0012] In the loading test system as described above, optionally, the cutting part loading system includes a second test reducer, a second torque meter, a second loading motor, and a cutting part on-site junction box connected in sequence, the second test reducer is connected to the cutting part of the tested coal mining machine, the cutting part on-site junction box is connected to the four-quadrant loading inverter, the power of the second test reducer is 1100KW, and the power of the second loading motor is 1000KW.

[0013] In the loading test system as described above, optionally, the control and data processing system includes a torque and speed sensor, which is connected between the test piece and the loading motor of the loading system, and is used to collect the torque, speed and power of the test piece during loading, and the control and data processing system collects the temperature of the loading motor and the test piece in real time and monitors the voltage of the distribution box of the power supply and distribution system.

[0014] The present invention proposes a loading test system, which can perform loading tests according to the test environment that different types of coal mining machines need to simulate, and at the same time meet the power range of the test piece and the power supply voltage control of different test pieces. The loading test system of the present invention can perform step-by-step loading and full-load tests on the cutting part and traction part of the coal mining machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The disclosure of the present invention will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings: Figure 1 A schematic diagram of an embodiment of a loading test system of the present invention; Figure 2 for Figure 1 A local enlarged view of region I; Figure 3 for Figure 1 A local enlarged view of region II; Figure 4 for Figure 1 A local enlarged view of region III; Figure 5 for Figure 1 A local enlarged view of the IV region; Figure 6 for Figure 1 A local enlarged view of the V region; Figure 7 A schematic diagram of a power supply and distribution system of an embodiment of a loading test system of the present invention; Figure 8It is a schematic diagram of a cutting part loading system and a traction part loading system of an embodiment of a loading test system of the present invention. DETAILED DESCRIPTION

[0016] Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0017] For any single technical feature described or implied in the embodiments mentioned in this document, or any single technical feature displayed or implied in the accompanying drawings, the present invention still allows any combination or deletion between these technical features (or their equivalents) without any technical obstacles, and thus it should be considered that these more embodiments according to the present invention are also within the scope of the description of this document.

[0018] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. indicates or implicitly includes at least one of the features.

[0019] Figure 1 FIG. 4 is a schematic diagram of an embodiment of a loading test system of the present invention.

[0020] like Figure 1 As shown, the present invention provides a loading test system, which includes a power supply and distribution system, a loading system, a control and data processing system, and a software system. The power supply and distribution system is used to provide the required voltage level for the loading test system and the test piece; the loading system is used to simulate the load condition of the coal mining machine under actual working conditions; the control and data processing system is used to collect and process the test parameters of the loading test system and the test piece; the software system is used to display the operating parameters of the loading test system in real time.

[0021] In an optional embodiment, the test piece includes the cutting part, traction part and the whole machine of the coal mining machine. The power supply and distribution system provides the required voltage level for the loading test system and the test piece. The power supply and distribution system ensures that the cutting part and the traction part have a stable and appropriate power supply during the test, and makes the provided voltage waveform closer to the ideal state, reduces the interference of voltage fluctuations, harmonics, etc. on the test equipment, and ensures the accuracy of the test data. The loading system applies loads that simulate actual working conditions to the cutting part and the traction part. In the actual operation of the coal mining machine, the cutting part must overcome the resistance of coal and rock to cut, and the traction part must drive the coal mining machine to move on the coal mining working face, and will bear corresponding loads. By simulating these loads, the loading system allows the cutting part and the traction part to reproduce the actual working conditions as much as possible under the test environment.

[0022] The loading system includes the loading inverter, the traction loading system and the cutting loading system. The loading inverter controls the loading motor in the whole system. The loading motor is usually used to simulate the load. The load is applied by the loading motor to detect the performance of the tested equipment under different load conditions.

[0023] The control and data processing system includes a torque and speed sensor, which is connected between the test piece and the loading motor of the loading system. The torque and speed sensor collects the torque, speed and power of the test piece when it is loaded, and the control and data processing system collects the temperature of the loading motor and the test piece in real time and monitors the voltage of the distribution box.

[0024] The main function of the software system is to display in real time the various operating parameters of the loading test system during operation. These operating parameters include but are not limited to voltage, current, torque, speed, etc. The software system presents the data obtained from the control and data processing system to the operator through an intuitive graphical interface and data display method. The operator can monitor the progress of the test in real time through this interface, and once any abnormal data or operating status is found, appropriate measures can be taken in time to deal with it. At the same time, the software system also has data recording and analysis functions, which can store and further analyze and process various data during the test, and provide data support for the performance evaluation and optimization of the coal mining machine. In an optional embodiment, the loading test system of the present application can monitor the power supply of the on-site lines, the cooling water inlet and temperature conditions, etc. in real time.

[0025] The power supply and distribution system includes a power input module, a distribution cabinet, a first transformer, a second transformer and a third transformer. The power input module is used to connect an external power supply to the loading test system. The first transformer is connected to the distribution cabinet and the cutting part and / or the whole machine part of the coal mining machine, and is used to supply power to the cutting part and / or the whole machine part of the coal mining machine; the second transformer is connected to the distribution cabinet and the loading inverter of the loading system, and is used to supply power to the loading inverter; the third transformer is connected to the distribution cabinet and the traction part of the coal mining machine, and is used to supply power to the traction part of the coal mining machine.

[0026] Figure 2 for Figure 1 A local enlarged view of region I.

[0027] like Figure 2 As shown in the figure, the power input module is a plant transformer with an input of 10000V, an output of 3300V, and an apparent power of 2000kVA. The plant transformer is connected to a set of distribution cabinets. The distribution cabinet uses a 3300V distribution cabinet. The capacity of the plant transformer can meet the factory commissioning test of the whole machine with a maximum installed power of 2655KW. The distribution cabinet is mainly used to distribute electric energy, control circuits and protect equipment. It distributes the input power to different power circuits, monitors and controls the circuits at the same time to ensure the safe and stable operation of the power system. When a circuit fails, it can cut off the power supply in time to protect the safety of equipment and personnel. The advantage of choosing a 3300V distribution cabinet is that it matches the voltage level of the power supply access, which can reduce the voltage conversion link, equipment cost and line loss.

[0028] exist Figure 2 In the embodiment shown, the plant transformer is connected to the outlet cabinet and PT and lightning arrester cabinet, capacitor compensation cabinet, DC screen, etc. The PT is a voltage transformer, which is used to convert high voltage into low voltage to facilitate the measurement of line voltage. The lightning arrester can protect electrical equipment from damage caused by lightning overvoltage and operation overvoltage. The capacitor compensation cabinet is used to improve the power factor of the power system, and the DC screen is used to provide a reliable DC power supply.

[0029] Figure 3 for Figure 1 A local enlarged view of area II.

[0030] like Figure 3As shown, three 3300V output outlet cabinets are connected in parallel, 3300V outlet cabinet 2 can output 3300V voltage, supply power to 3300V soft start cabinet 1 and 3300V soft start cabinet 2, 3300V outlet cabinet 3 supplies power to 3300V soft start cabinet 3, 3300V outlet cabinet 4 is connected to 3300V local junction box 1 and used for electric control system testing. In an optional embodiment, the electric control system test is to adjust, check and test the electrical control part of the coal mining machine, check whether the parameters such as voltage and frequency are within the qualified range, and the coal mining machine is equipped with a variety of sensors, such as temperature sensors, and the electric control system test includes calibrating the sensors and performing functional tests on the operation panel of the coal mining machine.

[0031] The soft start cabinet can be used to control the start of the cutting part of the coal mining machine. In an optional embodiment, the cutting part is started by soft start. The initial starting current of the cutting part is too large. If direct start is adopted, there will be a large impact current on the power grid. Soft start can be adopted to start at 30% of the rated voltage, and the voltage is gradually increased until the rated voltage is reached. When the motor is directly started, the motor is accelerated directly from a stationary state to a rated speed under the action of the rated voltage, which will generate a large starting current, causing a great impact on the power grid and the motor itself, and may cause the power grid voltage to drop instantly. At the same time, excessive starting current will also cause the motor to heat up seriously, increase the loss of the motor, and shorten the service life of the motor. Soft start allows the voltage, current and other parameters of the motor to rise slowly during the startup process, thereby achieving smooth startup of the motor. Soft start can avoid excessive current impact on the motor at the moment of startup, and protect the safe and stable operation of the motor and the entire power supply system.

[0032] Figure 4 for Figure 1 A local enlarged view of region III.

[0033] exist Figure 4 In the embodiment shown, the 3.3kV switch cabinet 5 is connected to the first transformer, and supplies power to the 1140V soft start cabinet 1, the 1140V soft start cabinet 2, the 1140V soft start cabinet 3 and the 1140V local connection box 1. In an optional embodiment, the 1140V local connection box 1 is used for testing the electric control system to check whether the parameters such as voltage and frequency are within the qualified range, such as detecting whether the voltage of the 1140V local connection box 1 is the rated voltage of 1140V. The soft start cabinet is used to control the start of the cutting part of the coal mining machine.

[0034] In an optional embodiment, the first transformer is a 1250kVA dry-type rectifier transformer with an input of 3300V and an output of 1140V. The transformer changes the voltage through the principle of electromagnetic induction without changing the frequency of the electric energy. A dry-type transformer is a transformer that does not use oil or other liquids as an insulating medium. Compared with traditional oil-immersed transformers, dry-type transformers do not have the risk of oil leakage and are more friendly in terms of fire prevention, explosion prevention, and maintenance. At the same time, dry-type transformers do not produce oil pollution during operation and are more environmentally friendly. A rectifier transformer is a transformer specially used in a rectifier circuit that can convert AC power into DC power. The apparent power of a 1250kVA dry-type rectifier transformer is 1250kVA, and the apparent power is the total power that the transformer can carry.

[0035] Figure 5 for Figure 1 A local enlarged view of region IV.

[0036] like Figure 5 As shown, the 3.3kV switch cabinet 6 is connected to the second transformer, which supplies power to the 690V starter cabinet 2 and the four-quadrant loading inverter respectively. The starter cabinet is used to control the start of the traction part of the coal mining machine. In an optional embodiment, the traction part of the coal mining machine adopts direct start. The 690V starter cabinet 2 is connected to the 690V local connection box 1 to supply power for the loading test of the traction part of the coal mining machine at a supply voltage of 690V. In some embodiments, the second transformer is a 1250kVA dry rectifier transformer with an input of 3300V and an output of 690V.

[0037] In an optional embodiment, in an optional embodiment, the loading frequency converter is a four-quadrant loading frequency converter, and the input voltage of the loading frequency converter is 690V, which is powered by the second transformer. The four-quadrant loading frequency converter can switch the power gear, and the four-quadrant loading frequency converter can realize the operation of the motor in four quadrants. The four quadrants refer to the four quadrants on the mathematical axis of its operating mechanical characteristic curve. The first quadrant is the forward electric state, the motor rotates forward and consumes electric energy, the second quadrant is the forward regenerative braking state, the motor rotates forward and feeds back electric energy to the power grid, the third quadrant is the reverse electric state, the motor rotates reversely and consumes electric energy, and the fourth quadrant is the reverse regenerative braking state, the motor rotates reversely and feeds back electric energy. Ordinary two-quadrant frequency converters can only drive the motor to rotate forward or reversely. The two-quadrant frequency converter works in the first and third quadrants, and the kinetic energy of the motor when idling can only be wasted. The four-quadrant loading frequency converter can not only drive the motor forward and reverse, but also convert the kinetic energy of the motor when idling into electric energy and feed it back to the power grid. At full rated load, that is, the maximum working intensity that can be sustained under normal working conditions, the use of a four-quadrant loading inverter can effectively feed back 80% of the electrical energy generated by the motor into the power grid.

[0038] exist Figure 5In the illustrated embodiment, the four-quadrant loading inverter is connected to the 690V outlet cabinet 4, wherein the 690V outlet cabinet 2 has an input wiring port and two output ports, the input wiring port is used to connect to a 690V power supply, and the two output ports can be used to output a 690V voltage.

[0039] Figure 6 for Figure 1 A local enlarged view of the V region.

[0040] like Figure 6 As shown, the 3.3kV switch cabinet 7 is connected to the third transformer, which is a 600kVA dry-type rectifier transformer with an input of 3300V and an output of 600V and 460V. The apparent power of the 600kVA dry-type rectifier transformer is 600kVA. The third transformer is connected to the 660V starter cabinet 1, and the 660V starter cabinet 1 is connected to the 660V local connection box 1. When the third transformer outputs 660V, the traction part of the coal mining machine is subjected to a loading test at a power supply voltage of 660V; when the third transformer outputs 460V, the traction part of the coal mining machine is subjected to a loading test at a power supply voltage of 460V.

[0041] exist Figure 6 The original workshop provided a 380V output power supply and connected it to the 380V incoming line cabinet 1, supplying power to the 380V input and 220V output distribution box and the 380V starting cabinet 3. The 380V starting cabinet 3 is connected to the 380V local junction box 1, which can supply power for the loading test of the traction part of the coal mining machine under the 380V supply voltage.

[0042] Figure 7 A schematic diagram of a power supply and distribution system of an embodiment of a loading test system of the present invention.

[0043] like Figure 7 As shown in the figure, the power supply voltage of the cutting part of the coal mining machine can be 1140V or 3300V, and the power supply voltage of the traction part can be 380V, 460V or 660V. Since the voltage of the traction part is relatively small, direct start is adopted, that is, the equipment is started directly with the rated voltage; the voltage of the cutting part is large, and soft start is adopted to start the cutting part smoothly.

[0044] Figure 8 It is a schematic diagram of a cutting part loading system and a traction part loading system of an embodiment of a loading test system of the present invention.

[0045] In an optional embodiment, the traction part loading system includes a first test reducer, a first torque meter, a first loading motor, and an on-site junction box of the traction part which are connected in sequence, the first test reducer is connected to the traction part of the tested coal mining machine, the on-site junction box of the traction part is connected to the four-quadrant loading frequency converter, the power of the first test reducer is 300KW, and the power of the first loading motor is 315KW; the cutting part loading system includes a second test reducer, a second torque meter, a second loading motor, and an on-site junction box of the cutting part which are connected in sequence, the second test reducer is connected to the cutting part of the tested coal mining machine, the on-site junction box of the cutting part is connected to the four-quadrant loading frequency converter, the power of the second test reducer is 1100KW, and the power of the second loading motor is 1000KW. In an optional embodiment, the traction part loading system can satisfy the requirements of 150-200KW step-by-step loading and full-load testing of the traction part, and the cutting part loading system can satisfy the requirements of 200-1100KW step-by-step loading and full-load testing of the cutting part.

[0046] The four-quadrant loading inverter can switch power gears and flexibly adjust the output power according to different load requirements. When the power of the four-quadrant loading inverter is switched to 500KW, it is connected to the traction unit loading system; when the power of the four-quadrant loading inverter is switched to 1000KW, it is connected to the cutting unit loading system. The traction unit is mainly responsible for the movement of the coal mining machine. Its load is relatively light. The power of 500KW is enough to meet the power demand of the traction unit under normal working conditions; the task of the cutting unit is to crush coal. During the working process, it needs to overcome the hardness of coal rock, friction and other large resistances. The power of 1000KW can provide enough power for the cutting unit to ensure that the cutting drum works at a suitable speed and torque, effectively crushing the coal and improving coal mining efficiency. In an optional embodiment, during the operation of the loading motor, when the motor brakes or decelerates, the rotation speed of the motor's rotor slows down relative to the stator, and the relative movement of the motor's electromagnetic field and electrons will generate electrical energy, which is returned to the inverter in the form of feedback current. The inverter can feed this part of the electrical energy back to the power grid for use, thereby reducing the energy consumption of the entire loading test system, so that the coal mining machine loading test system can not only perform effective loading tests, but also achieve efficient use of energy during the test to reduce costs.

[0047] In an optional embodiment, the power output range of the traction part of the coal mining machine is taken into consideration, and the power of the first test reducer is set to 300KW, which can effectively handle the power transmitted from the traction part, and neither fail to work normally due to too little power nor cause waste of resources due to too much power. The function of the first test reducer is to receive the power from the traction part of the coal mining machine, decelerate the power, adjust the speed and torque, and adapt it to the working requirements of the traction part loading system. The first torque meter is used to accurately measure the torque value after deceleration, and can monitor the torque changes transmitted by the traction part under different working conditions. The first loading motor is connected to the on-site junction box of the traction part to provide reverse loading power for the traction part loading system, simulating the load conditions that the traction part may encounter in actual work, so as to test the traction part.

[0048] In some embodiments, the power of the second test reducer is set to 1100KW. Since the task of the cutting part is to crush coal, it needs to handle greater torque and power. The power of the second test reducer is higher than that of the first test reducer. The second test reducer receives power from the cutting part of the coal mining machine and performs deceleration processing. The second torque meter is used to accurately measure the torque after processing by the second test reducer. The power of the second loading motor is 1000KW, which provides reverse loading power for the cutting part, simulates the load condition of the cutting part in the actual coal mining process, and thus comprehensively detects the performance indicators of the cutting part.

[0049] In an optional embodiment, when conducting tests on different test pieces, a torque and speed sensor can be set between the test piece and the loading motor. The torque and speed sensor can obtain the torque, speed and power of the test piece during the loading test, and adjust the output power of the loading motor in real time according to the collected data, so as to ensure that the loading test is carried out according to the expected requirements. In some embodiments, the control and data processing system will collect the temperature of the loading motor and the test piece in real time. The actual working condition of the test piece can be observed through the temperature, the temperature rise of the test piece under long-term loading conditions can be grasped, the performance changes and stability of the test piece under loading conditions can be evaluated, and it is helpful to timely detect whether the motor has abnormal heating and other conditions to ensure the normal operation of the loading motor.

[0050] Torque is a key parameter that reflects the cutting and traction force of the coal mining machine, and the speed reflects the operating speed of each component of the coal mining machine. These data are of vital importance for evaluating the performance of the coal mining machine. The torque and speed sensor is connected between the test piece and the loading motor. When the loading motor is running during the simulated load process, changes in torque and speed will occur between the test piece and the loading motor. The torque and speed sensor can sense these changes in real time and convert them into electrical signals for transmission to the control and data processing system. After receiving these electrical signals, the control and data processing system converts them into actual torque and speed data through internal processing algorithms, providing accurate data basis for evaluating the performance of the coal mining machine.

[0051] In an optional embodiment, the test parameters of the loading test system include at least one of temperature, voltage, current and power. In some embodiments, since a large amount of heat is generated during the operation of the coal mining machine, it is necessary to monitor the temperature of the test piece to ensure that the coal mining machine will not be damaged due to overheating, and it is necessary to monitor that the voltage should fluctuate within the rated voltage range of the motor. The current size reflects the load condition of the motor. By analyzing the voltage and current data, it is determined whether the working state of the coal mining machine is normal. By simulating the load condition of the coal mining machine and observing the range of power variation, it is ensured that the test piece works within the rated power range and the power curve meets the requirements.

[0052] This loading test system is mainly used in key links such as the research and development, production and quality inspection of coal mining machines. In the research and development stage of coal mining machines, the system can simulate the load conditions in various actual working scenarios, verify and optimize the design scheme of the coal mining machine, and ensure that the design of the coal mining machine can meet the needs of actual work. In the production process, the system can be used to conduct strict quality inspections on each coal mining machine to ensure that the produced coal mining machines meet the quality standards. In the quality inspection link of the coal mining machine, the loading test system simulates the load conditions of the coal mining machine in actual work, and can comprehensively and accurately detect the performance indicators and reliability of the cutting part, traction part and the whole machine of the coal mining machine, timely discover potential quality problems, and ensure the efficient and stable operation of the coal mining machine in actual use, thereby improving the safety and production efficiency of coal mining operations and reducing the failure rate and maintenance costs in coal mining operations.

[0053] The above implementation modes are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A loading test system for a coal mining machine, the loading test system is used to perform performance tests on a cutting part, a traction part and a whole machine of the coal mining machine, characterized in that: The cutting part, the traction part and the whole machine of the coal mining machine are the test pieces, and the loading test system includes: A power supply and distribution system, the power supply and distribution system is used to provide the required voltage level for the loading test system and the test piece; A loading system, the loading system is used to simulate the load of the coal mining machine under actual working conditions; A control and data processing system, the control and data processing system is used to collect and process test parameters of the loading test system and the test piece; and A software system is used to display the operating parameters of the loading test system in real time.

2. The loading test system according to claim 1, characterized in that: The cutting part is started by soft starting, and the traction part is started by direct starting.

3. The loading test system according to claim 1, characterized in that: The test parameter includes at least one of temperature, voltage, current and power.

4. The loading test system according to claim 1, characterized in that: The power supply and distribution system comprises: A power input module, the power input module is used to connect the loading test system to an external power source; A power distribution cabinet, which is used for power distribution; a first transformer, the first transformer being connected to the power distribution cabinet and the cutting part and / or the whole machine part of the coal mining machine, and being used for supplying power to the cutting part and / or the whole machine part of the coal mining machine; a second transformer, the second transformer being connected to the power distribution cabinet and the loading frequency converter of the loading system and being used for supplying power to the loading frequency converter; A third transformer, wherein the third transformer is connected to the power distribution cabinet and the traction part of the coal mining machine, and is used to supply power to the traction part of the coal mining machine.

5. The loading test system according to claim 4, characterized in that: The power input module is a factory transformer with an input of 10000V, an output of 3300V, and an apparent power of 2000kVA. The first transformer is a dry-type rectifier transformer with an input of 3300V, an output of 1140V, and an apparent power of 1250kVA. The second transformer is a dry-type rectifier transformer with an input of 3300V, an output of 690V, and an apparent power of 1250kVA. The third transformer is a dry-type rectifier transformer with an input of 3300V, an output of 600V or 460V, and an apparent power of 600kVA.

6. The loading test system according to claim 5, characterized in that: The loading system includes the loading frequency converter, a traction part loading system and a cutting part loading system.

7. The loading test system according to claim 6, characterized in that: The loading inverter is a four-quadrant loading inverter capable of switching voltage levels. The four-quadrant loading inverter is connected to the second transformer, and when the power gear of the four-quadrant loading inverter is switched to 500KW, the four-quadrant loading inverter is connected to the traction part loading system, and when the power gear of the four-quadrant loading inverter is switched to 1000KW, the four-quadrant loading inverter is connected to the cutting part loading system.

8. The loading test system according to claim 7, characterized in that: The traction part loading system includes a first test reducer, a first torque meter, a first loading motor, and a traction part on-site junction box connected in sequence. The first test reducer is connected to the traction part of the tested coal mining machine, and the traction part on-site junction box is connected to the four-quadrant loading inverter. The power of the first test reducer is 300KW, and the power of the first loading motor is 315KW.

9. The loading test system according to claim 7, characterized in that: The cutting part loading system includes a second test reducer, a second torque meter, a second loading motor, and a cutting part on-site junction box which are connected in sequence. The second test reducer is connected to the cutting part of the tested coal mining machine, and the cutting part on-site junction box is connected to the four-quadrant loading inverter. The power of the second test reducer is 1100KW, and the power of the second loading motor is 1000KW.

10. The loading test system according to claim 8 or 9, characterized in that: The control and data processing system includes a torque and speed sensor, which is connected between the test piece and the loading motor of the loading system. The torque and speed sensor is used to collect the torque, speed and power of the test piece during loading, and the control and data processing system collects the temperature of the loading motor and the test piece in real time and monitors the voltage of the distribution box of the power supply and distribution system.

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