CN204988982U - A electric friction wear testing machine for brush material - Google Patents

Abstract

This device an electric friction wear testing machine for brush material includes rack -mounted experimental cavity, X axial displacement device, Y axial displacement device and rotating assembly, rotating assembly is including the perpendicular rotation axis that the sets up servo motor rotatory with driving the rotation axis, the last velometer that detects the servo motor rotational speed of installing of servo motor, install the clamping device who is used for fixed commutator on the rotation axis, the commutator sets up internally at the test cavity. The utility model has the characteristics of coefficient of friction, wearing and tearing parameter and the current -carrying ability etc. Of test commutator brush material under different load and speed.

Description

An electric friction and wear testing machine for brush materials

technical field

The utility model relates to an electric friction and wear testing machine for electric brush materials.

Background technique

The brush is a component that transmits current between the rotating circuit and the static circuit, and has wear resistance and good electrical conductivity. Most of the existing friction and wear testing machines are designed for mechanical wear, which cannot meet the current-carrying conditions required for brush simulation work; and the existing electric friction and wear testing machines also have many shortcomings. First, they cannot monitor the instantaneous Friction force and friction coefficient. The friction coefficient can reflect the matching state of the friction surface to a certain extent, which is of great significance in the test. However, the force measurement system of the equipment capable of friction measurement is often separated from the loading system, which makes the structure more complicated and increases the system error. Secondly, the current-carrying conditions and working mode are single, and the test conditions of constant current, constant voltage and reciprocating friction cannot be realized. Although the large-scale bench test machine meets the test conditions of the brush, it is difficult to quickly and easily evaluate and analyze the electrical friction and wear performance of the brush due to its long test period, high cost and cumbersome procedures.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a kind of electric friction and wear test for brush materials for testing the friction coefficient, wear parameters and current carrying capacity of commutator brush materials under different loads and speeds machine.

In order to achieve the above object, the technical solution adopted in the utility model is:

An electric friction and wear testing machine for brush materials, including a test chamber installed on a frame, an X-axis moving device, a Y-axis moving device and a rotating assembly, the rotating assembly includes a vertically arranged rotating shaft And a servo motor that drives the rotating shaft to rotate. A speedometer for detecting the speed of the servo motor is installed on the rotating shaft. A clamping device for fixing the commutator is installed on the rotating shaft. The commutator is arranged in the test chamber in vivo,

The test cavity is symmetrically provided with brush chucks on both sides of the central axis of the commutator, and the brush chucks are connected to the friction detection device through a connecting rod, and the friction detection device is installed in the Y-axis On the moving device and detect the friction between the brush fixed on the brush chuck and the commutator when the commutator rotates, the Y-axis moving device drives the brush chuck along the tangent of the commutator The Y-axis moving device is installed on the X-axis moving device, and the X-axis moving device drives the brush chuck to move horizontally along the radial direction of the commutator, so that the brush is disengaged or pressed tighten the commutator, the X-axis moving device is provided with a pressure detection device for detecting the pressure between the brush and the commutator,

The speedometer, the friction detection device and the pressure detection device are connected with PLC, and the PLC transmits the signal to the control panel for display.

The X-axis moving device includes a first slide rail and a first slide block installed on the first slide rail, the first slide rail is installed on the frame, and the first slide block is installed on the first slide rail On the first slider, a mounting base is fixed, and a moving device that drives the mounting base to move on the first slide rail is installed on the frame, and the pressure detection device is installed on the moving device,

A vertical guide rail mounting plate is also installed on the mounting base, and a Y-axis moving device is installed on the guide rail mounting plate, and the Y-axis moving device includes a second slide rail and a The second slider, the second slide rail is horizontally installed on the guide rail mounting plate, the connecting rod is fixed on the second slider, and the friction detection device is also installed on the guide rail mounting plate, so The friction detection device is a bidirectional pressure sensor, and the second sliding block is respectively provided with baffles matching the detection ends at the two detection ends of the bidirectional pressure sensor.

The two baffles are movably installed on the second slider, so that the distance between the two baffles can be adjusted.

The moving device is a screw rotation mechanism, the screw rotation mechanism includes a screw and a moving block, the pressure detection device is fixed on the mounting base, and the moving block on the screw rotation mechanism is installed on the fixed pulley block The steel wire rope is connected to the detection end of the pressure detection device, and the screw of the screw rotation mechanism drives the moving block to move so as to drive the mounting seat to move along the first slide rail,

The pressure detection device is a one-way pressure sensor.

An infrared heating device is installed in the test chamber.

Due to the adoption of the above scheme, the utility model monitors the instantaneous wear parameters (normal pressure, friction force, friction coefficient) through the velocimeter, the friction detection device and the pressure detection device, which ensures the reliability of the experiment and reduces the system's impact on the test. The error value caused by the servo motor can be used to carry out the simulation test with adjustable positive and negative cycles, which improves the adaptability of the test.

In summary, this device can clearly grasp the wear process of materials by combining the wear parameters such as instantaneous friction force, instantaneous pressure, and the cumulative number of turns recorded by the control panel, plus the analysis of the wear and loss of the sample line after the simulation test. And life and other parameters, to provide a reliable guarantee for follow-up work.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is an enlarged view of the X-axis moving device, the Y-axis moving device and the rotating assembly of the utility model.

FIG. 4 is a side view of FIG. 3 .

detailed description

Below in conjunction with accompanying drawing, the specific implementation manner of this patent is described in further detail.

As shown in Figures 1 to 4, an electric friction and wear testing machine for brush materials includes a test chamber installed on a frame, an X-axis moving device 8, a Y-axis moving device 7 and a rotating assembly, The rotating assembly includes a vertically arranged rotating shaft 2 and a servo motor 10 that drives the rotating shaft 2 to rotate. The servo motor 10 is equipped with a speedometer 9 that detects the rotational speed of the servo motor 10. The speed detector 9 adopts a photoelectric sensor. A clamping device 3 for fixing the commutator is installed on the rotating shaft 2, the clamping device 3 is a triangular chuck, and the commutator 4 is arranged in the test cavity,

The two sides of the central axis of the commutator 4 in the test chamber are symmetrically provided with brush chucks 5, and the brush chucks 5 are connected to the friction detection device through the connecting rod 6, and the friction detection device is installed On the Y-axis moving device 7 and detect the friction between the brush 51 fixed on the brush holder and the commutator 4 when the commutator rotates, the brush holder is along the tangential direction of the commutator The horizontal movement drives the Y-axis moving device 7 to move, the Y-axis moving device 7 is installed on the X-axis moving device 8, and the X-axis moving device 8 drives the brush chuck along the reversing direction. The radial and horizontal movement of the device makes the brush break away from or press the commutator. The X-axis moving device 8 is provided with a pressure detection device for detecting the pressure between the brush and the commutator.

The speedometer, the friction detection device and the pressure detection device are connected with PLC, and the PLC transmits the signal to the control panel for display.

The X-axis moving device 8 includes a first slide rail 82 and a first slide block 83 installed on the first slide rail 82, the first slide rail 82 is installed on the frame 1, and the first slide block 83 is installed on the first slide rail 82, the first slide block 83 is fixed with a mount 81, the frame 1 is equipped with a moving device that drives the mount 81 to move on the first slide rail, the pressure The detection device is installed on the mobile device,

As an embodiment of the device, the moving device is a screw rotation mechanism, the screw rotation mechanism includes a screw 85 and a moving block 86, the pressure detection device is a one-way pressure sensor, and the one-way pressure The sensor 84 is fixed on the mounting base 81, and the moving block 86 on the screw rotating mechanism is connected with the detection end of the one-way pressure sensor 84 through a steel wire rope 87 installed on the fixed pulley block 88. The screw mandrel of the screw rotating mechanism 85 drives the moving block 86 to move so as to drive the mounting seat to move along the first slide rail 83 .

A vertical guide rail mounting plate 71 is also installed on the mounting seat 81, and a Y-axis moving device 7 is installed on the guide rail mounting plate 71. The Y-axis moving device 7 includes a second slide rail 72 and is installed on the The second slide block 73 on the second slide rail 72, the second slide rail 72 is horizontally installed on the guide rail mounting plate 71, the connecting rod 6 is fixed on the second slide block 73, and the guide rail mounting plate The friction detection device is also installed on the 71, and the friction detection device is a bidirectional pressure sensor 75, and two detection ends of the bidirectional pressure sensor 75 on the second slider 73 are respectively provided with matching detection ends. Baffle 74. The two baffle plates 74 are movably mounted on the second slider, so that the distance between the two baffle plates 74 can be adjusted. An infrared heating device is installed in the test chamber.

working principle:

Force loading and verification process: When adjusting the screw rod of the X-axis moving device 8, the moving block 86 acts on the one-way pressure sensor, and at the same time drives the mounting plate to move, and the one-way pressure sensor detects the gap between the brush and the commutator. Pressure, and the positive pressure value is displayed on the display, so that it is convenient to adjust the positive pressure between the brush and the commutator before the test. The verification process can be completed by a verification device, and the verification device in this example can be completed by a fixed pulley, a stay wire and a weight.

Force measurement and control process: The friction force detected by the friction force detection device is obtained through the interaction between the pressure block and the detection end of the bidirectional pressure sensor 75, and the signal is transmitted to the control panel after being processed by the PLC controller. The measurement and feedback process of the positive pressure is through the pulling force on the screw rod of the X-axis moving device 8 acting on the pressure head on the one-way sensor, and the signal is transmitted to the control panel through PLC controller processing, thus reflecting the instantaneous positive pressure .

Claims (6)

1. An electric friction and wear testing machine for brush materials, comprising a test chamber mounted on a frame, an X-axis moving device, a Y-axis moving device and a rotating assembly, characterized in that: the rotating assembly It includes a vertically arranged rotating shaft and a servo motor that drives the rotating shaft to rotate. A speedometer for detecting the rotational speed of the servo motor is installed on the rotating shaft. A clamping device for fixing the commutator is installed on the rotating shaft. The orientation device is set in the test chamber, The test cavity is symmetrically provided with brush chucks on both sides of the central axis of the commutator, and the brush chucks are connected to the friction detection device through a connecting rod, and the friction detection device is installed in the Y-axis On the moving device and detect the friction between the brush fixed on the brush chuck and the commutator when the commutator rotates, the Y-axis moving device drives the brush chuck along the tangent of the commutator The Y-axis moving device is installed on the X-axis moving device, and the X-axis moving device drives the brush chuck to move horizontally along the radial direction of the commutator, so that the brush is disengaged or pressed tighten the commutator, the X-axis moving device is provided with a pressure detection device for detecting the pressure between the brush and the commutator, The speedometer, the friction detection device and the pressure detection device are connected with PLC, and the PLC transmits the signal to the control panel for display. 2. The electric friction and wear testing machine for brush materials according to claim 1, characterized in that: the X-axis moving device comprises a first slide rail and a first slide block installed on the first slide rail , the first slide rail is mounted on the frame, the first slide block is mounted on the first slide rail, the first slide block is fixed with a mounting seat, and the frame is mounted with a drive mounting seat a mobile device that moves on the first slide rail, the pressure detection device is installed on the mobile device, A vertical guide rail mounting plate is also installed on the mounting base, and a Y-axis moving device is installed on the guide rail mounting plate, and the Y-axis moving device includes a second slide rail and a The second slider, the second slide rail is horizontally installed on the guide rail mounting plate, the connecting rod is fixed on the second slider, and the friction detection device is also installed on the guide rail mounting plate, so The friction detection device is a bidirectional pressure sensor, and the second sliding block is respectively provided with baffles matching the detection ends at the two detection ends of the bidirectional pressure sensor. 3. The electric friction and wear testing machine for brush materials according to claim 2, characterized in that: the two baffles are movably mounted on the second slider, so that the distance between the two baffles can be adjusted Adjustment. 4. The electric friction and wear testing machine for brush materials according to claim 2, characterized in that: the moving device is a screw rotating mechanism, and the screw rotating mechanism includes a screw and a moving block, the The pressure detection device is fixed on the mounting base, and the moving block on the screw rotation mechanism is connected with the detection end of the pressure detection device through a steel wire rope installed on the fixed pulley block, and the screw rod of the screw rotation mechanism drives the moving block to move thereby Drive the mounting seat to move along the first slide rail. 5. The electric friction and wear testing machine for brush materials according to claim 4, characterized in that: the pressure detection device is a unidirectional pressure sensor. 6. The electric friction and wear testing machine for brush materials according to any one of claims 1 to 5, characterized in that: an infrared heating device is installed in the test chamber.