A low-speed heavy-load linear friction force detection device and method suitable for a shearer shoe

Abstract

The application provides a low-speed heavy-load linear friction force detection device and detection method suitable for a shearer shoe, comprising a pressing hydraulic cylinder support frame, a first pressing hydraulic cylinder, a second pressing hydraulic cylinder, a first pin row, a second pin row, a first shearer shoe, a second shearer shoe, a first horizontal movement hydraulic cylinder, a second horizontal movement hydraulic cylinder, a pin row matched support roller, a bracket, a support circular table, a first lifting hydraulic cylinder, a second lifting hydraulic cylinder, a pressure sensor, a speed sensor and a liquid crystal control console arranged beside a shearer test bed. The application has the advantages that the friction force detection function under the condition of low-speed heavy-load linear friction force of the shearer shoe can be well met, and the experimental detection range of the friction force and wear characteristics of the shearer shoe is more comprehensive.

Description

TECHNICAL FIELD

[0001] The present application relates to fully mechanized coal mining equipment technical field, specifically to a kind of low-speed heavy load linear friction detection device and detection method suitable for shearer shoe. BACKGROUND

[0002] Shearer guide shoe mainly plays the role of supporting shearer and guiding, and the dry friction exists between shearer guide shoe and pin array, and the actual working condition is very poor under the influence of dust, gravel, sand and the like. Therefore, shearer guide shoe is one of the components prone to failure in shearer, and the failure mode is mainly shearer guide shoe friction and wear failure.

[0003] The state of shearer when working is low-speed heavy load dry friction, and the existing device for detecting friction is mainly rotary motion friction, and the pressing force is small, so the existing device is not suitable for experimental detection of shearer shoe friction and wear characteristics. In view of the above problems, the present application provides a kind of low-speed heavy load linear friction detection device and detection method suitable for shearer shoe, and a specific experimental method is used to test the friction performance of shearer shoe. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a kind of low-speed heavy load linear friction detection device and detection method suitable for shearer shoe, to solve the problem of lacking low-speed heavy load linear friction detection device suitable for shearer shoe, and to provide a detection method of shearer shoe wear performance detection device.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: on the one hand, the present application provides a kind of low-speed heavy load linear friction detection device of shearer shoe, which comprises: a pressing hydraulic cylinder support frame, a first pressing hydraulic cylinder arranged on the pressing hydraulic cylinder support frame, a second pressing hydraulic cylinder, a first pin array and a second pin array arranged below the first pressing hydraulic cylinder and the second pressing hydraulic cylinder, a first shearer shoe and a second shearer shoe arranged on the first pin array and the second pin array, a first horizontal motion hydraulic cylinder and a second horizontal motion hydraulic cylinder arranged on both sides of the pin array, a group of rollers arranged below the first pin array and the second pin array, a bracket arranged below the first horizontal motion hydraulic cylinder, the second horizontal motion hydraulic cylinder, the first pressing hydraulic cylinder, the second pressing hydraulic cylinder and the pressing hydraulic cylinder support frame, a supporting circular table arranged below the bracket, a first lifting hydraulic cylinder and a second lifting hydraulic cylinder arranged below the bracket, a pressure sensor arranged on the first shearer shoe and the second shearer shoe, a speed sensor arranged on the first pin array and the second pin array, and a liquid crystal control console arranged beside the shearer shoe friction test bench.

[0006] As preferred of the present application, the pressing hydraulic cylinder support frame is fixedly connected with the first pressing hydraulic cylinder and the second pressing hydraulic cylinder.

[0007] As preferred of the present application, the other end of the first pressing hydraulic cylinder and the second pressing hydraulic cylinder is fixedly connected with the first coal cutter shoe and the second coal cutter shoe.

[0008] As preferred of the present application, the first coal cutter shoe and the second coal cutter shoe are slidingly connected with the first pin row and the second pin row, and the first coal cutter shoe and the second coal cutter shoe can slide horizontally on the first pin row and the second pin row by the pushing of the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder.

[0009] As preferred of the present application, one end of the first pin row and the second pin row is connected with the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder, and the first pin row and the second pin row can move horizontally on the bracket by the pushing of the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder.

[0010] As preferred of the present application, the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder are placed above the bracket, and the horizontal movement hydraulic cylinder is fixedly connected with the bracket, and the bracket is supplemented with reinforcing ribs on both sides to ensure the stability of the pressing hydraulic cylinder support frame.

[0011] As preferred of the present application, the first pin row and the second pin row are placed above the bracket, and the pin row is fixedly connected with the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder.

[0012] As preferred of the present application, the carrier roller is below the first pin row and the second pin row, and the pin row can move horizontally on the bracket through the carrier roller by the pushing of the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder.

[0013] As preferred of the present application, the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are placed below the bracket, and the bracket is fixedly connected with the first lifting hydraulic cylinder and the second lifting hydraulic cylinder, and the bracket can be lifted by the movement of the first lifting hydraulic cylinder and the second lifting hydraulic cylinder.

[0014] As preferred of the present application, the supporting circular table is placed below the bracket, and the supporting circular table is fixedly connected with the bracket to support the bracket and the parts above the bracket.

[0015] As preferred of the present application, the speed sensor is arranged on the first pin row and the second pin row, and is opposite to the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder to measure the horizontal movement speed of the pin row.

[0016] As preferred in the present application, the pressure sensor is arranged on the first and second shearer shoes to measure the pressure of the first and second shearer shoes acting on the pin rows.

[0017] As preferred in the present application, the liquid crystal console is placed beside the friction detection device workbench to control the pressure of the first and second pressing hydraulic cylinders, the first and second horizontal movement hydraulic cylinders and the first and second lifting hydraulic cylinders, and receive the signals of the pressure sensor and the speed sensor, and display on the liquid crystal console display screen.

[0018] In another aspect, the present application also provides a detection method of the low-speed heavy-load linear friction detection device of the shearer shoe, comprising the following steps:

[0019] Step 1: During operation, the first and second shearer shoes remain stationary, and the first and second pin rows are repeatedly moved along the parallel direction of the bracket under the pushing of the first and second horizontal movement hydraulic cylinders, so as to realize the relative movement of the first and second shearer shoes and the first and second pin rows, and the relative movement speed of the first and second shearer shoes and the first and second pin rows is controlled by controlling the extension and retraction speed of the first and second horizontal movement hydraulic cylinders, so as to detect the traction speed of the shearer.

[0020] Step 2: The left bottom of the bracket is connected with the first and second lifting hydraulic cylinders, and when the first and second lifting hydraulic cylinders are in the initial position, the bracket is horizontal, the first and second pin rows are relatively moved with the first and second shearer shoes under the action of the first and second horizontal movement hydraulic cylinders, and the first and second shearer shoes are in normal working condition.

[0021] Step 3: When the first and second lifting hydraulic cylinders push the bracket to drive the first and second pin rows and the first and second shearer shoes to tilt at a certain angle, the end of the lifting hydraulic cylinder where the bracket is located and the end of the supporting circular table have a height difference, and the first and second shearer shoes and the first and second pin rows are in positive angle pitch working condition and negative angle pitch working condition.

[0022] Step 4: control the pressing force of the first and second pressing hydraulic cylinders, simulate the pressure load of the shearer acting on the shoe under actual working conditions, and detect the pressure of the shoe acting on the pin row when the shearer is working.

[0023] Step 5: cover a layer of coal ash or fine coal particles on the first and second pin rows of the experimental bench, then control the first and second pressing hydraulic cylinders, the first and second horizontal movement hydraulic cylinders, and the first and second lifting hydraulic cylinders to detect the working conditions when the coal ash or fine coal particles affect the shoe, and detect the working state of the shearer shoe under different conditions.

[0024] Step 6: the liquid crystal control console can control the pressure of the pressing hydraulic cylinders, horizontal movement hydraulic cylinders, and lifting hydraulic cylinders, receive the signals of the pressure sensor and the speed sensor, and display them on the display screen, so as to adjust the detection conditions of the first and second shearer shoes and the first and second pin rows, and better detect the working condition of the shearer.

[0025] Step 7: give the first and second lifting hydraulic cylinders and the first and second pressing hydraulic cylinders pressure, and determine the required conditions for the experiment, take the pressure and working inclination angle of the shearer shoe acting on the pin row under actual working conditions, give the first and second horizontal movement hydraulic cylinders a constant horizontal movement speed, detect the movement speed of the shearer shoe under actual working conditions, determine the required working time of the shearer, and when the working time is sufficient, remove the first and second shearer shoes, and determine the wear condition of the first and second shearer shoes.

[0026] Step 8: calculate and analyze the friction force of the shearer under low-speed heavy-load straight-line working conditions according to the collected detection data, observe the difference in wear performance of the shearer shoe under different pressure conditions, complete the record, and complete the detection experiment. Step 1: the first and second shearer shoes remain stationary, the first and second pin rows are repeatedly moved along the parallel direction of the bracket under the push of the first and second horizontal movement hydraulic cylinders, thereby realizing the relative movement of the first and second shearer shoes and the first and second pin rows, the relative movement speed of the first and second shearer shoes and the first and second pin rows is controlled by controlling the extension and retraction speed of the first and second horizontal movement hydraulic cylinders, and the traction speed of the shearer is detected.

[0027] Step 2: The left bottom of the bracket is connected with the first lifting hydraulic cylinder and the second lifting hydraulic cylinder, when the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are in the initial position, the bracket is horizontal, the first pin row and the second pin row move relative to the first shearer shoe and the second shearer shoe under the action of the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder, and the first shearer shoe and the second shearer shoe are in the normal working condition.

[0028] Step 3: When the first lifting hydraulic cylinder and the second lifting hydraulic cylinder push the bracket to drive the first pin row, the second pin row and the first shearer shoe, the second shearer shoe and other structures to tilt at a certain angle, the end of the lifting hydraulic cylinder where the bracket is located and the end of the supporting circular table have a height difference, and the first shearer shoe and the second shearer shoe are in the positive angle pitch working condition and the negative angle pitch working condition with the first pin row and the second pin row respectively.

[0029] Step 4: The pressure of the first pressing hydraulic cylinder and the second pressing hydraulic cylinder is controlled to detect the pressure load of the shearer acting on the shoe in the actual working condition, and the pressure of the shearer shoe acting on the pin row is also detected.

[0030] Step 5: A layer of coal ash or fine coal particles is laid on the first pin row and the second pin row of the experimental table, and then the first pressing hydraulic cylinder, the second pressing hydraulic cylinder, the first horizontal movement hydraulic cylinder, the second horizontal movement hydraulic cylinder, the first lifting hydraulic cylinder and the second lifting hydraulic cylinder are controlled to carry out experiments, so as to detect the working condition when the coal ash or fine coal particles affect the shoe, and detect the working state of the shearer shoe under the influence of different conditions.

[0031] Step 6: The pressure of the pressing hydraulic cylinder, the horizontal movement hydraulic cylinder and the lifting hydraulic cylinder can be controlled by the liquid crystal center console, and the signals of the pressure sensor and the speed sensor can be received and displayed on the display screen, so as to adjust the detection conditions of the first shearer shoe and the second shearer shoe on the first pin row and the second pin row, and better detect the working condition of the shearer.

[0032] Step 7: The pressure of the first lifting hydraulic cylinder, the second lifting hydraulic cylinder, the first pressing hydraulic cylinder and the second pressing hydraulic cylinder is given, and the required conditions for the experiment are determined, the pressure of the shearer shoe acting on the pin row and the working inclination angle in the actual working condition are given, the constant horizontal movement speed of the first horizontal movement hydraulic cylinder and the second horizontal movement hydraulic cylinder is given, the movement speed of the shearer shoe in the actual working condition is detected, the working time of the shearer required for detection is determined, when the working time is enough, the first shearer shoe and the second shearer shoe are removed, and the wear condition of the first shearer shoe and the second shearer shoe is determined.

[0033] Step 8: through the collected test data, the size of the friction force of the coal mining machine under the actual working condition is calculated and analyzed, the difference of the wear performance of the coal mining machine under different pressure conditions is observed, the record is completed, and the test experiment work is completed.

[0034] By adopting the technical scheme of the present application, at least the following beneficial effects are achieved:

[0035] 1. The first pin row and the second pin row can move relatively in the parallel direction of the bracket in the bracket groove through the pushing of the first horizontal motion hydraulic cylinder and the second horizontal motion hydraulic cylinder, the relative motion speed of the first coal mining machine shoe and the second coal mining machine shoe and the first pin row and the second pin row is determined by controlling the extension and retraction speed of the first horizontal motion hydraulic cylinder and the second horizontal motion hydraulic cylinder, thereby the specific working condition of the coal mining machine shoe under test is determined, the detection condition is accurate, and the horizontal motion working effect of the coal mining machine shoe under test is determined; on the other hand, the first pin row and the second pin row can be pushed in two directions at the same time to move in the test working condition, and the working condition of the coal mining machine shoe under different working conditions is determined.

[0036] 2. The pressure load of the coal mining machine shoe acting on the pin row under the actual working condition is detected through the pressing force of the first pressing hydraulic cylinder and the second pressing hydraulic cylinder, thereby the size of the pressure of the coal mining machine acting on the coal mining machine shoe in the actual working condition is detected, the detection condition of the pressure of the pin row is accurate; on the other hand, the working state of the coal mining machine shoe under the condition of the pressure of the coal mining machine is accurately detected.

[0037] 3. When the first pin row, the second pin row, the first coal mining machine shoe and the second coal mining machine shoe are pushed upward by the first lifting hydraulic cylinder and the second lifting hydraulic cylinder to a certain angle, a height difference is generated between the end of the lifting hydraulic cylinder where the bracket is located and the end of the supporting circular table, the first coal mining machine shoe and the second coal mining shoe are in the positive angle pitch working condition and the negative angle pitch working condition with the first pin row and the second pin row, and when the coal mining machine is in the actual working condition, the coal mining machine and the coal mining machine shoe are often in a non-horizontal angle due to the complexity of the working condition; through the design, the working state of the coal mining machine under different angles can be accurately detected under different working conditions, thereby the measurement result is more accurate.

[0038] 4. Through the driving of the six hydraulic cylinders at different positions, the working state of the coal mining machine shoe under different pressure actions, under different driving speeds, under the pitch condition of the negative angle or the positive angle can be accurately detected, the test bench can well meet the detection requirement of the actual working condition of the coal mining machine, and the size of the low-speed heavy-load straight-line friction force of the coal mining machine can be accurately detected.

[0039] 5, by giving the first lifting hydraulic cylinder, the second lifting hydraulic cylinder and the first pressure hydraulic cylinder, the second pressure hydraulic cylinder pressure and the condition required for detection, the pressure of the shearer shoe acting on the pin row and the working inclination are detected, and then the horizontal drive hydraulic cylinder is given a constant horizontal motion speed, the motion speed of the shearer shoe in the actual working condition is detected, the working time of the shearer required for detection is determined, when the working time is enough, the shearer shoe is removed, the wear condition of the shearer shoe is determined, and the accurate experimental detection result is obtained.

[0040] 6, by the liquid crystal center console giving the friction detection workbench multiple pressure conditions, the working condition of the shearer shoe under different conditions is detected, and the measured data is output for analysis through the display, the friction size under different detection conditions is obtained through comprehensive analysis, stable and accurate experimental results similar to the actual working condition are obtained, the wear condition of the shearer shoe under different working pressure, driving speed and working angle of the shearer is judged, and the influence of the friction force on the shearer shoe under low speed and heavy load is detected. BRIEF DESCRIPTION OF DRAWINGS

[0041] The application will be further described below with reference to the embodiments and the accompanying drawings.

[0042] Figure 1 is one of the three-dimensional structure diagrams of the detection device of the application;

[0043] Figure 2 is the second three-dimensional structure diagram of the detection device of the application;

[0044] Figure 3 is Figure 1 the enlarged view of the A part in the figure;

[0045] Figure 4 is Figure 1 the enlarged view of the B part in the figure;

[0046] Figure 5 is the top view of the detection device of the application;

[0047] Figure 6 is the schematic diagram of the first pin row and the second pin row in the application;

[0048] Figure 7 is the schematic diagram of the pin row installation roller structure in the application;

[0049] Figure 8 is one of the schematic diagrams of the bracket in the application.

[0050] Explanation of reference signs:

[0051] 1 - first shearer shoe; 2 - second shearer shoe; 3 - first press hydraulic cylinder; 4 - second press hydraulic cylinder; 5 - press hydraulic cylinder support frame; 6 - bracket; 7 - first horizontal movement hydraulic cylinder; 8 - second horizontal movement hydraulic cylinder; 9 - first lifting hydraulic cylinder; 10 - second lifting hydraulic cylinder; 11 - support circular table; 12 - liquid crystal center console; 13 - speed and pressure sensor; 14 - first pin row; 15 - second pin row; 16 - pin row adapted carrier roller. DETAILED DESCRIPTION

[0052] In order to better understand the technical solutions of the present application, the technical solutions of the present application will be described in more detail below in conjunction with the drawings of the specification and specific embodiments.

[0053] It should be noted that the terms "center", "longitudinal", "transverse", "upper", "rear", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing these embodiments and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0054] Example 1

[0055] Please refer to Figures 1 to 8As shown, the low-speed heavy-load linear friction force detection device 18 adapted to the shearer shoe, the low-speed heavy-load linear friction force detection device 16 adapted to the shearer shoe comprises a pressing hydraulic cylinder support frame 5, a first pressing hydraulic cylinder 3 arranged on the pressing hydraulic cylinder support frame 5, a second pressing hydraulic cylinder 4, a first pin row 14 and a second pin row 15 arranged below the first pressing hydraulic cylinder 3 and the second pressing hydraulic cylinder 4, a first shearer shoe 1 and a second shearer shoe 2 arranged on the first pin row 14 and the second pin row 15, a first horizontal movement hydraulic cylinder 7 and a second horizontal movement hydraulic cylinder 8 arranged on both sides of the first pin row 14 and the second pin row 15, a group of pin rows adapted to the roller 16 arranged below the first pin row 14 and the second pin row 15, a bracket 6 arranged below the first horizontal movement hydraulic cylinder 7, the second horizontal movement hydraulic cylinder 8, the first pressing hydraulic cylinder 3, the second pressing hydraulic cylinder 4 and the pressing hydraulic cylinder support frame 5, a support circular table 11 arranged below the bracket 6, a first lifting hydraulic cylinder 9 and a second lifting hydraulic cylinder 10 arranged below the bracket 6, a pressure sensor 13 arranged on the first shearer shoe 1 and the second shearer shoe 2, a speed sensor 13 arranged on the first pin row 14 and the second pin row 15, and a liquid crystal central control console 12 arranged beside the friction force detection test bench 17.

[0056] When working, the first and second shearer shoes 1, 2 remain stationary, and are repeatedly moved along the parallel direction of the bracket 6 under the pushing of the first and second pin rows 14, 15 in the first and second horizontal movement hydraulic cylinders 7, 8, so as to realize the relative movement of the first and second shearer shoes 1, 2 and the first and second pin rows 14, 15. The relative movement speed of the first and second shearer shoes 1, 2 and the first and second pin rows 14, 15 is controlled by controlling the extension and retraction speed of the first and second horizontal movement hydraulic cylinders 7, 8, so as to detect the traction speed of the shearer. The first and second lifting hydraulic cylinders 9, 10 are connected to the left bottom of the bracket 6. When the first and second lifting hydraulic cylinders 9, 10 are in the initial position, the bracket 6 remains horizontal, the first and second pin rows 14, 15 move relative to the first and second shearer shoes 1, 2 under the action of the first and second horizontal movement hydraulic cylinders 7, 8, and the first and second shearer shoes 1, 2 are in the normal working condition. When the first and second lifting hydraulic cylinders 9, 10 push the bracket 6 to drive the first and second pin rows 14, 15 and the first and second shearer shoes 1, 2 to tilt at a certain angle, the bracket 6 is located at the height difference between one end of the first and second lifting hydraulic cylinders 9, 10 and one end of the supporting circular table 11, and the first and second shearer shoes 1, 2 and the first and second pin rows 14, 15 in which the first and second shearer shoes 1, 2 are arranged are in the positive angle pitch working condition and the negative angle pitch working condition. The pressure load of the shearer acting on the shearer shoe in the actual working condition is detected by controlling the pressing force of the first and second lifting hydraulic cylinders 9, 10, and the pressure of the shearer shoe acting on the pin row in the actual working condition is also detected. A layer of coal ash or fine coal particles is laid on the first and second pin rows 14, 15 of the friction force detection test bench 17, and then the first and second horizontal movement hydraulic cylinders 7, 8, the first and second pressing hydraulic cylinders 3, 4, and the first and second lifting hydraulic cylinders 9, 10 are controlled to perform experiments, so as to detect the working condition of the shearer shoe when the coal ash or fine coal particles affect the shearer shoe, and detect the working state of the shearer shoe in the actual working condition under the influence of different conditions.The first horizontal movement hydraulic cylinder 7, the second horizontal movement hydraulic cylinder 8, the first pressing hydraulic cylinder 3, the second pressing hydraulic cylinder 4, the first lifting hydraulic cylinder 9 and the second lifting hydraulic cylinder 10 can be controlled by the liquid crystal center console 12, and the signals of the pressure sensor and the speed sensor 13 are displayed on the display screen of the liquid crystal center console 12, so that the pressure conditions of the first coal mining machine shoe 1 and the second coal mining machine shoe 2 acting on the first pin row 14 and the second pin row 15 are adjusted, and the working conditions of the coal mining machine under the actual working conditions are detected. The pressure of the first pressing hydraulic cylinder 3, the second pressing hydraulic cylinder 4, the first lifting hydraulic cylinder 9 and the second lifting hydraulic cylinder 10 is determined, and different detection methods are adopted under different experimental conditions, for example, a layer of coal ash or fine coal particles is laid on the first pin row 14 and the second pin row 15 of the friction force detection test bench 17, and then the first horizontal movement hydraulic cylinder 7, the second horizontal movement hydraulic cylinder 8, the first pressing hydraulic cylinder 3, the second pressing hydraulic cylinder 4, the first lifting hydraulic cylinder 9 and the second lifting hydraulic cylinder 10 are controlled to conduct experiments, so that the working conditions of the shoes when the coal ash or fine coal particles affect the shoes are detected and researched, and the working conditions of the shoes under the actual working conditions under the influence of different conditions are detected. The pressure and working inclination angle of the first coal mining machine shoe 1 and the second coal mining machine shoe 2 acting on the first pin row 14 and the second pin row 15 are detected, the first horizontal movement hydraulic cylinder 7 and the second horizontal movement hydraulic cylinder 8 are given a constant horizontal movement speed, the movement speed required by the coal mining machine under the actual working conditions is detected, the working time of the coal mining machine required for detection is determined, the first coal mining machine shoe 1 and the second coal mining machine shoe 2 are removed when the working time is sufficient, and the wear of the first coal mining machine shoe 1 and the second coal mining machine shoe 2 is determined. Through the collected detection data, the size of the friction force of the coal mining machine under the actual working conditions is calculated and analyzed, the differences in the wear performance of the shoes of the coal mining machine under different pressure conditions are observed, the record is completed, and the detection experiment is completed.

[0057] Although the specific embodiments of the present application are described above, those skilled in the art should understand that the specific embodiments described are only illustrative, and are not used to limit the scope of the present application, and equivalent modifications and changes made in accordance with the present application should be covered by the scope of the claims of the present application.

Claims

1. A low-speed, heavy-load linear friction force testing device suitable for coal mining machine slippers, comprising a coal mining machine slipper friction force testing platform and an LCD control panel disposed on one side of the coal mining machine slipper testing platform; characterized in that: The coal mining machine slipper test bench includes a coal mining machine slipper clamping assembly, a pin push assembly, and a bracket support assembly. The coal mining machine slipper clamping assembly includes a clamping hydraulic cylinder support frame, a first clamping hydraulic cylinder, a second clamping hydraulic cylinder, a first coal mining machine slipper, a second coal mining machine slipper, and a pressure sensor. The pin push assembly includes a first pin row, a second pin row, a first horizontal motion hydraulic cylinder, a second horizontal motion hydraulic cylinder, a speed sensor, and a roller adapted to the pin row. The bracket support assembly includes a bracket, a first lifting hydraulic cylinder, a second lifting hydraulic cylinder, and a supporting frustum. The components of the coal mining machine slipper clamping assembly are fixedly connected, pressing the coal mining machine slipper onto the pin row. The components of the pin push assembly are fixedly linked and slidably connected to the coal mining machine slipper clamping assembly. The pin row can move horizontally along the bracket under the push of the horizontal drive hydraulic cylinder. The bracket support assembly supports other components and can be leveled and lifted by the drive of the lifting hydraulic cylinder.

2. The low-speed heavy-load linear friction force detection device for coal mining machine slippers as described in claim 1, characterized in that: The coal mining machine slipper clamping assembly includes a first and a second clamping hydraulic cylinder connected to the clamping hydraulic cylinder support frame; the first and second coal mining machine slippers are connected to the first and second clamping hydraulic cylinders, and the pressure exerted by the first and second coal mining machine slippers on the first and second pin rows can be changed by driving the pressure of the first and second clamping hydraulic cylinders; the pressure sensor is fixed on the first and second coal mining machine slippers to detect the pressure they receive.

3. The low-speed heavy-load linear friction force detection device for coal mining machine slippers as described in claim 1, characterized in that: The pin-push assembly includes the first and second horizontal motion hydraulic cylinders and the first and second pins connected to them. The first and second pins can move along the horizontal direction of the bracket through the idler rollers adapted to the pins under the drive of the first and second horizontal motion hydraulic cylinders. The speed sensor is fixed on the first and second pins to detect their horizontal movement speed.

4. The low-speed heavy-load linear friction force detection device for coal mining machine slippers as described in claim 1, characterized in that: The bracket is fixedly connected to the coal mining machine slipper clamping assembly and the pin push assembly, and supports both of them. The first and second lifting hydraulic cylinders are fixedly connected to the support pedestal and support the bracket. The bracket can be driven to flatten and lift by driving the first and second lifting hydraulic cylinders.

5. The low-speed heavy-load linear friction force detection device for coal mining machine slippers as described in claim 1, characterized in that: The LCD central control panel can control the pressure of the first and second lifting hydraulic cylinders, the first and second clamping hydraulic cylinders, and the first and second horizontal movement hydraulic cylinders. It can also collect data from the pressure sensor and speed sensor in real time and display it on its screen, thus providing centralized control of the coal mining machine slipper test bench.

6. A detection method for a low-speed, heavy-load linear friction force detection device for a coal mining machine slipper, based on any one of claims 1-5, characterized in that: Includes the following steps: The required pressure and speed of the coal mining machine's sliding shoe are set by controlling the LCD central control panel. The first and second horizontal motion hydraulic cylinders; the first and second clamping hydraulic cylinders and the first and second lifting hydraulic cylinders receive information from the LCD central control panel and drive the corresponding components with different pressure magnitudes; The first and second horizontal motion hydraulic cylinders and the first and second clamping hydraulic cylinders drive the first and second coal mining machine slippers and the first and second pin rows, so that they are under different pressure conditions and different movement speeds, simulating different working conditions of the coal mining machine. The first and second lifting hydraulic cylinders drive the bracket to place the bracket at different working angles, simulating different working conditions of the coal mining machine; The LCD central control panel receives signals from the pressure sensor and speed sensor to determine whether the working pressure applied to each component can detect the working status of the coal mining machine's slipper. To determine the wear of the coal mining machine's slippers under different working pressures, drive speeds, and working angles, and to detect the impact of friction on the slippers when the coal mining machine is operating at low speed and heavy load.

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