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Bearing retainer cage material impact on the operation of the bearing
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| Time：2016.09.07 News Sources：Shandong Xinkaite bearing Co.,Ltd. Views：
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(1) on the holder material General Requirements
1) has a low hardness and high wear resistance, high hardness materials though have a high wear resistance, but as with high hardness materials for the cage, will wear the rolling elements to rotate adversely affect performance, and even "cohesion phenomenon."
2) Since the holder to withstand repeated tensile and compressive stresses, it is required to have higher fatigue strength; the need for flexibility and toughness; resistance to centrifugal force.
3) retainer light weight, low-density material, so SUNTHAI bearing friction loss, can ease the impact of the rolling elements and out of the load zone.
4) Good plastic working and cutting performance; has sufficient rigidity and flexibility.
5) the coefficient of friction between the rings and rolling small.
6) chemically stable, easy to rust.
(2) on the holder material additional requirements
1) surface wettability, which can be attached or storing lubricant;
2) good thermal conductivity, heat dissipation; a large heat capacity, heat;
3) has a shock-absorbing capacity, easy to resonate with other parts,
4) easy to produce noise.
(3) on the holder material special requirements
1) In the case must have a corrosion resistance, since the holder does not need special high hardness, it can be used austenitic stainless steel and 0Cr18Ni9 used most;
2) In the case of high temperature, also have sufficiently high temperature austenitic stainless steel strength;
3) When a particular need to improve the strength of the cage, you can use low-carbon steel sheet nitrocarburizing surface treatment;
4) Under conditions require self-lubricating, use graphite steel cage, or can a porous material oil storage cage;
5) Work in a magnetic field, and sometimes the material does not interfere with the requirements of an external magnetic field is not affected by the external magnetic field.
Bearing temperature, and it can be presumed according to the external temperature of the bearing seat. But the use of direct measurement hole KOYO bearing outer ring temperature is more accurate. Bearing temperature gradually increased from the start of the operation, the temperature is usually 1 to 2 hours after stabilization. If the bearing mounting bad, the temperature will soar, abnormal high temperature. The reason such as too much lubricant, KOYO bearing clearance is too small, poor installation, seal friction and too big. High-speed rotation of the occasion, bearing structure, lubrication and so is the choice of the wrong reason.
KOYO bearing rotation with a stethoscope and other tests, there is a strong metal noise, different sound, sound, etc. Description Exceptions irregular. The reasons are poor lubrication, shaft or bearing bad accuracy, bearing damage, foreign invasion and so on.
1, tile surface corrosion: spectral analysis found abnormal concentrations of non-ferrous metal elements; iron spectrum, there have been a number of sub-micron wear particles of non-ferrous metals; lubricants excessive moisture, acid value exceeded.
2, the journal surface strain: iron spectrum in abrasive cutting or black iron oxide particles, the presence of temper color metal surface.
3, surface corrosion journal: spectral analysis found abnormal concentrations of iron, iron spectrum, there are a number of sub-micron particles of iron components, lubricants excessive moisture or acid value exceeded.
4, the surface strain: iron spectrum found in cutting abrasive, abrasive component of non-ferrous metals.
5, tile back fretting: spectral analysis found abnormal concentrations of iron, iron spectrum, there are many iron content submicron wear particles, water and lubricating oil acid value exception.
In the liquid lubrication conditions, the sliding surfaces are separated from lubricating oil without direct contact, but also can greatly reduce the friction losses and wear surface, the film also has a certain vibration absorption capability
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