Controlled replenishing lubrication system

Details Controlled replenishing lubrication system Controlled replenishing lubrication system

1987-04-27

1988-04-19

Croyle, Carlton R.

Lubrication

Systems

With safety or indicating means

184 74, 184108, 384470, F01M 1112

Patent

active

047383364

ABSTRACT:
A controlled replenishing lubrication system provides a desired supply of oil to a rolling element bearing by monitoring the changes in the rolling element ball retainer to shaft speed ratio. This ratio is a function of elastohydrodynamic oil film thickness between elements of the bearing. Changes in the speed ratio are monitored by a sensor and fed to a control system which commands a pump to inject oil into the bearing when the speed ratio varies from a predetermined limit. The rolling elements are moveably mounted for rotation within a retainer or cage in a bearing housing. The retainer includes a light reflective indicia. A shaft is rotatably connected to rotate the retainer and the rolling elements. The shaft also includes a light reflective indicia. The sensor is mounted on or adjacent the bearing for simultaneously emitting light toward the retainer and shaft indicia for sensing variations in reflection of the light therefrom and for generating pulses to the control system responsive to the variations. The pump then responds to commands from the control system for providing a desired amount of lubricant to the bearing.

REFERENCES:
patent: 1762566 (1930-06-01), Wedeberg
patent: 2545719 (1951-03-01), Wedeberg
patent: 3127954 (1964-04-01), Callahan et al.
patent: 3561565 (1971-02-01), Woor

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