High speed rotating apparatus having face-to-face contact ball b

Details High speed rotating apparatus having face-to-face contact ball b High speed rotating apparatus having face-to-face contact ball b

1993-03-02

1995-04-25

Vrablik, John J.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

384516, 384523, 384615, F04C 1816, F04C 2900, F16C 1918, F16C 3340

Patent

active

054093597

ABSTRACT:
A combination of two angular type ball bearings provided in a face-to-face arrangement for use at high speed to support a substantially unidirectional axial load, such that e.g. when a loading in a leftward direction is applied to the rotating shaft during rotation, the contact angle of the left side bearing which supports this load is made larger, while the contact angle of the right side bearing which does not support this load is made smaller to avoid a drop in fatigue life and improve the endurance of a rolling bearing unit, wherein the product of the pitch circle diameter of the raw of balls and the rotating speed of the inner ring of the bearing is in the range of 700,000 to 2,000,000 mm.rpm, and the radial load is up to twice the axial load.

REFERENCES:
patent: 5273413 (1993-12-01), Wallin
Br. A. B. Jones, "The Life of High-Speed Ball Bearings", Jul. 1952, pp. 695-703, Transactions of the ASME.
Application of Engineering Ceramics to Rolling Bearing (Kikai Sekkei (Mechanical Design), Japan), pp. 66-71.
Tedric A. Harris, "Rolling Bearing Analysis", 1966, pp. 246-253.
New Departure, "Bearing Application", Part One-Principal ball bearing types and fundamentals of mounting, pp. 1-3.
Pumpac "The MRC Bearing System", pp. 1-7.
Wirth, Erkelenz/W. Germany "Milling Machine for Light Metal Ingots", p. 93.
Japanese Literature Excerpt "How to Select and use Rolling Bearings", pp. 325 and 326.
RHP Precision, High Precision Bearings, sections 2.3.4, 2.3.5 and 2.4.

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