Date: 2013-08-22

Thrust ball bearing performance requirements

On ball bearings or tapered roller bearings can take axial preload method, while the short cylindrical roller bearings can take radial preload method, can significantly improve the way thrust ball bearing shaft bearing rigidity, eliminating the time or thrust ball bearing clearance, or to get a little negative clearance. But speed is not too high, modest temperature conditions, should preferably not transferred to the negative clearance state.
In preload, should continue to measure the deformation, pay attention to the low stage in the deformation, deformation increases with the pretension load is nonlinear; while at high values of phase distortion with linear load increase is up. Once the load deformation appears linear relationship, they will stop increasing pretension load, this time has been obtained constant stiffness. Thereafter, one-way thrust ball bearing axial stiffness and radial stiffness fixed relationship exists between, without relying on the applied load.
Thrust ball bearings are used grease need to have the following requirements:
(1) good adaptability, high and low temperature performance, both indoors and outdoors, North and South Common.
(2) lubrication, abrasion resistance, and do not dump oil, not dry, not emulsified, does not drain the grease itself should not contain solids.
(3) good oxidation resistance, after very long use, grease exterior colors, small changes in acidity, no significant oxidation.
(4) good fluidity, generally require the use of temperature -25 ° C-120 ° C, starting torque, low operating torque, less power consumption, low temperature rise.
(5) anti-rust, anti-fog ability, good water resistance, suitable for harsh working environments.
(6) insulation class A, E, B grade, shall not contain sulfur, chlorine extreme pressure additives.
(7) long life, extended service intervals, reducing the consumption of one-way thrust ball bearings.
(8) the appropriate consistency, with good damping effect, can reduce one-way thrust ball bearing noise, are environmentally friendly.

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