Rotary shaft and lubricating system therefor

Details Rotary shaft and lubricating system therefor Rotary shaft and lubricating system therefor

1989-10-26

1991-06-04

Lazarus, Ira S.

Lubrication

Systems

Vertical shaft

184 612, 184 614, 384398, F01M 1100

Patent

active

050206354

ABSTRACT:
A tool shaft is supported for rotation about a vertical axis by means of upper and lower bearings. A motor drives the shaft at least at 500 rpm. A gap is formed radially between the shaft and an adjacent stationary member, the gap extending from one bearing to the other. A reservoir which contains lubricating oil communicates with the gap to supply oil thereto to cool and lubricate. The tool shaft carries a helical thread disposed within the gap which pumps the oil upwardly through the gap and through the bearings to create a hydrostatic bearing for the shaft segment extending between the bearings. The tool shaft is driven by a gear shaft which also is provided with a hydrostatic support by means of oil pumped through a radial gap by means of helical threads which are stationary, but which are disposed closely adjacent a surface of the gear shaft.

REFERENCES:
patent: 712602 (1902-11-01), Schaum
patent: 1157644 (1915-10-01), London
patent: 1186195 (1916-06-01), Honegger
patent: 1822573 (1931-09-01), Gerald et al.
patent: 4037890 (1977-07-01), Kurita et al.
patent: 4280338 (1981-07-01), Shannon et al.
patent: 4344507 (1982-08-01), Osborne
patent: 4383577 (1983-05-01), Pruitt

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