What are the requirements for sliding bearing metal materials?

The following focuses on the most widely used bearing alloy materials in metal materials:

(1) Bearing alloys, also known as white alloys or babbitt alloys, are mainly alloys of tin, lead, antimony or other metals. Bearing alloys have lower strength and are more expensive. They must be used as bearing lining materials in bearing bushes of bronze, steel or cast iron to form a thinner coating.

(2) Tin-based bearing alloys have the advantages of good plasticity, thermal conductivity and corrosion resistance, and low friction coefficient and expansion coefficient, which are suitable for the production of important bearings, such as large machines such as steam turbines, engines, motors and air compressors. High speed bearing bush. The disadvantages are low fatigue strength and low operating temperature (not higher than 150 ° C), which is more expensive. The wider brand used is ZSnSb11Cu6.

(3) The strength, hardness, thermal conductivity and corrosion resistance of lead-based bearing alloys are lower than those of tin-based bearing alloys, and the friction coefficient is larger, but the price is relatively cheap. Suitable for manufacturing medium and low load bearing bushes, such as automotive, tractor crankshaft bearings, railway vehicle bearings, mill bearings, etc.
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INA overall eccentric bearing noise elimination method

The main task of bearing failure analysis is to find out the main factors causing the failure of INA bearing based on a large amount of background materials, analysis data and failure modes, so as to propose improvement measures in a targeted manner and extend the service life of spherical roller bearings to avoid The bearing has a sudden early failure.

The vibration of the bearing has a significant effect on the failure of the bearing. For example: spalling, indentation, corrosion, cracks, wear, etc. will be reflected in the INA bearing vibration detection. Therefore, by using a special overall eccentric bearing vibration measuring device (frequency analyzer and vibration) The instrument can measure the magnitude of the vibration. The frequency of the vibration can be inferred. The measured value of the abnormal vibration is different depending on the premise of the INA bearing or the installation position of the sensor. Therefore, it is necessary to analyze and compare the measurement values ​​of each machine in advance. After determining the judgment scale.

1. Reason: The overall eccentric bearing has low precision. The method selects the bearing with the specified accuracy grade.

2. Reason: The spindle is bent or the hole of the box is different. The method is to repair the spindle or the box.

3, the reason: the belt is too tight method: adjust the belt to make the elastic appropriate

4. Reason: Poor lubrication method: select the lubricating material of the specified grade and clean it properly.

5, the reason: low assembly quality method: improve assembly quality

6, reason: bearing inner casing running method: replacement of bearings and related wear parts

7. The axial force is too large. Method: Clean and adjust the clearance of the sealing ring. Between 0.2 and 0.3mm, correct the balance of the impeller and verify the static balance.

8, bearing damage method: replace INA bearing
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