Device for electric pulse corrosion test of bearing

Abstract

The utility model relates to a device for bearing electric pulse corrosion test, which comprises a test platform, a motor and a bearing seat are sequentially fixed on the test platform in the same axial direction, a rotating shaft is arranged in the bearing seat in a penetrating manner, the rotating shaft is in transmission connection with an output shaft of the motor through a rubber pipe, and one end of the rubber pipe is fixedly connected to the output shaft of the motor. An electric brush seat is fixed at the outer end of the bearing seat, an electric brush is arranged in the electric brush seat, the electric brush is in contact connection with the rotating shaft extending out of the bearing seat, the electric brush is electrically connected with one end of a power supply, and the bearing seat is electrically connected with the other end of the power supply. And the bearing seat is electrically connected with the rotating shaft through a bearing. The device is specially used for detecting the electrocorrosion of the bearing, and tests whether the bearing to be detected meets the working requirements or not by simulating the working state of the bearing in a power-on state.

Description

Technical Field

[0001] This utility model relates to a testing device for detecting bearing performance. Background Technology

[0002] Bearing electro-corrosion refers to the corrosion phenomenon caused by electrochemical reactions during bearing operation. Impurities or frictional heat generated during long-term bearing operation create a potential difference, leading to bearing electro-corrosion. Strengthening bearing maintenance, improving electrolyte purity, selecting appropriate bearings, and optimizing the equipment operating environment are all measures that can prevent bearing electro-corrosion and extend bearing life. However, in some cases, it is necessary to utilize the conductivity of bearings. For example, in a car steering wheel where a horn is installed, current technology uses wires to achieve conductivity. Now, direct conductivity through the bearing is required. Under direct energization, electro-corrosion is more pronounced. Therefore, the bearing's electro-corrosion performance is crucial, and currently, there is no dedicated equipment for testing this performance. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings in the prior art, this utility model provides a testing device specifically for detecting the electrical corrosion performance of bearings.

[0004] This utility model is achieved through the following technical solution:

[0005] An apparatus for testing electrical pulse corrosion of bearings includes a test platform. A motor and a bearing housing are fixed sequentially in the same axial direction on the test platform. A rotating shaft is axially inserted inside the bearing housing. The rotating shaft is connected to the output shaft of the motor via a rubber tube. One end of the rubber tube is fixedly connected to the output shaft of the motor, and the other end is fixedly connected to the rotating shaft. A bearing to be tested is fitted on the rotating shaft and rotates relative to the bearing housing through the bearing to be tested. A brush holder is fixed to the outer end of the bearing housing. A brush is installed inside the brush holder and contacts the rotating shaft extending out of the bearing housing. The brush is electrically connected to one end of a power supply, and the bearing housing is electrically connected to the other end of the power supply. The bearing housing is electrically connected to the rotating shaft through the bearing.

[0006] Preferably, the rubber tube is fixed to the motor output shaft by a tube clamp and sleeved onto the rotating shaft by an interference fit.

[0007] Preferably, the rotating shaft has two steps, and the bearing to be inspected has two bearings, each located on one of the steps.

[0008] Preferably, the bearing housing includes a cylindrical body and end caps fixed to both ends in the axial direction by screws, and the power supply wire is locked to the end caps of the bearing housing by screws.

[0009] This invention simulates the working state of a bearing. A motor connects to a rotating shaft, which rotates the bearing. The bearing is positioned between the shaft and its housing. The motor's operation is controlled by a PLC, and the power supply is also controlled by a circuit board. Continuous operation allows for the assessment of the bearing's performance under energized conditions. One end of the power supply is connected to a brush, and the other end is connected to the bearing housing. The brush contacts the rotating shaft, and the bearing under test is fitted onto the shaft, positioned between the shaft and its housing. Current then flows through the brush, shaft, inner bearing ring, steel balls, grease, outer bearing ring, and bearing housing, forming a closed loop.

[0010] The beneficial effects of this utility model are as follows: This utility model is specifically used for the detection of bearing electrical corrosion. By simulating the working state of the bearing under power, it tests whether the bearing under test meets the working requirements. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the utility model.

[0012] Figure 2 yes Figure 1 A partial diagram of the exploded structure. Detailed Implementation

[0013] The utility model will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] like Figure 1 , 2 As shown, an apparatus for testing bearing electrical pulse corrosion includes a test platform. A motor 1 and a bearing housing 4 are sequentially fixed to the test platform along the same axial direction. A rotating shaft 3 is axially inserted inside the bearing housing. The rotating shaft is connected to the output shaft of the motor via a rubber tube 2. One end of the rubber tube 2 is fixedly connected to the output shaft of the motor 1, and the other end is fixedly connected to the rotating shaft 3. The rubber tube is a tube with both a certain degree of hardness and flexibility. Its hardness ensures the transmission of the motor's output torque, while its flexibility allows the output shaft of the motor and the rotating shaft to not necessarily be aligned on the same axis. A bearing 8 to be tested is mounted on the rotating shaft 3 and rotates relative to the bearing housing through the bearing 8. The rotating shaft 3 has two steps, and two bearings 8 are provided, each located on a corresponding step. A brush holder 6 is fixed to the outer end of the bearing housing 4. A brush 5 is installed inside the brush holder and contacts the rotating shaft 3 extending from the bearing housing. The brush is electrically connected to one end of a power supply, and the bearing housing 4 is electrically connected to the other end of the power supply. The bearing housing is electrically connected to the rotating shaft 3 through the bearing 8 to be tested.

[0015] The motor's output shaft is connected to the rotating shaft 3 via a rubber tube 2. The rubber tube is fixed to the motor's output shaft by a clamp and fitted onto the rotating shaft 3 with an interference fit, or it can also be fixed to the rotating shaft by a clamp. The motor's output shaft is connected to the rotating shaft via the rubber tube 2, thereby driving the rotating shaft to rotate. The rubber tube 2 can also achieve a transmission connection, and the setting of the rubber tube has low requirements for concentricity, which is convenient for production and installation. The rubber tube is a tube with a certain degree of hardness and flexibility. Its hardness can ensure the transmission of the motor's output torque, and its flexibility makes the concentricity requirement between the motor and the rotating shaft low. The bearing housing 4 includes a cylindrical body and end caps 7 fixed to both ends of the shaft by screws. The power cord is directly locked to the end caps of the bearing housing by screws on the end caps 7.

[0016] This invention simulates the working state of a bearing. A motor connects to a rotating shaft to achieve rotation. The bearing is positioned between the shaft and the bearing housing. The motor's operation is controlled by a PLC, and the power supply is also controlled by a circuit board. Through continuous operation, the bearing's performance under energized conditions is assessed. One end of the power supply is connected to a brush 5, and the other end is connected to the bearing housing 4. The brush contacts the rotating shaft, and the bearing under test is fitted onto the shaft, positioned between the shaft and the bearing housing. Current then flows through the brush 5, the rotating shaft 3, the inner ring of the bearing, the steel balls, the outer ring of the bearing, and the bearing housing 4, forming a closed loop.

[0017] Under current operating conditions, bearings generally only perform the mechanical function of rotation and do not perform the function of conducting electricity. In the car steering wheel, where the horn is installed in the center, the original method of conducting electricity was through wires. Now, a new solution has been proposed, which is to achieve direct conductivity through the bearing in the steering wheel, without going through wires. However, after the bearing becomes conductive, it will produce electro-corrosion, which may affect its mechanical rotation performance. Therefore, it is necessary to simulate this usage environment to test whether the bearing is qualified after long-term operation and whether it can still work normally. For example, whether there is noise, jamming, or wear and burns on the appearance.

[0018] This invention is specifically designed for the detection of electrical corrosion in bearings. By simulating the working state of a bearing under energized conditions, it achieves both rotational and conductive properties, thus testing whether the bearing under test meets the operational requirements.

Claims

1. An apparatus for testing electrical pulse corrosion of bearings, comprising a test platform, characterized in that: On the test platform, a motor and a bearing housing are fixed sequentially in the same axial direction. A rotating shaft is axially inserted inside the bearing housing. The rotating shaft is connected to the output shaft of the motor via a rubber tube. One end of the rubber tube is fixedly connected to the output shaft of the motor, and the other end is fixedly connected to the rotating shaft. The bearing to be tested is fitted on the rotating shaft and rotates relative to the bearing housing through the bearing to be tested. A brush holder is fixed to the outer end of the bearing housing. A brush is installed inside the brush holder. The brush contacts and connects to the rotating shaft extending out of the bearing housing. The brush is electrically connected to one end of the power supply, and the bearing housing is electrically connected to the other end of the power supply. The bearing housing is electrically connected to the rotating shaft through the bearing.

2. The apparatus for bearing electrical pulse corrosion testing according to claim 1, characterized in that: The rubber tube is fixed to the motor output shaft by a tube clamp and is sleeved onto the rotating shaft by an interference fit.

3. The apparatus for bearing electrical pulse corrosion testing according to claim 1, characterized in that: The rotating shaft has two steps, and the bearing to be inspected has two bearings, each located on one of the steps.

4. The apparatus for testing bearing electrical pulse corrosion according to claim 1, characterized in that: The bearing housing includes a cylindrical body and end caps fixed to both ends in the axial direction by screws. The power supply wire is locked to the end caps of the bearing housing by screws.

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