Two hybrid ball bearings and a compressor bearing arrangement
AssigneeAktiebolaget Skf
InventorsHans Wallin, Rudolf Hauleitner
Life of this patent
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Abstract
Two hybrid ball bearings and a compressor bearing arrangement with two hybrid ball bearings for a rotatable support of a rotor of the compressor versus a stator of the compressor. The two hybrid ball bearings are arranged face-to-face or back-to-back, are configured with an optimal axial clearance depending on the inner diameter of a ring-shaped inner raceway element one of the hybrid ball bearings respectively a pitch diameter of one of the two hybrid ball bearings for a long bearing life in connection with an optimal compressor operating performance.
Claims19
Two hybrid ball bearings comprise:
- a first hybrid ball bearing, comprising a first inner ring and a first outer ring, the first outer ring having a first inner diameter on which a first plurality of balls roll thereon;
- a second hybrid ball bearing comprising a second inner ring and a second outer ring, the second outer ring having a second inner diameter on which a second plurality of balls roll thereon;
- wherein one of:
- (1) the first inner ring and the second inner ring, or (2) the first outer ring and the second outer ring are axially aligned and in abutting contact, and the other one of:
- (1) the first inner ring and the second inner ring, or (2) the first outer ring and the second outer ring are axially aligned and spaced so as to define an axial clearance therebetween, wherein the axial clearance is less than or equal to seventy micro-meters (70 μm);
- wherein the first hybrid ball bearing and the second hybrid ball bearing are configured to provide an axial clearance with zero mounting loads.
A compressor bearing arrangement comprising:
- two hybrid ball bearings for a rotatable support of a rotor of the compressor versus a stator of the compressor, wherein
- the two hybrid ball bearings have an axial clearance with zero mounting loads, comprising:
- a first hybrid ball bearing, comprising a first inner ring and a first outer ring, the first outer ring having a first inner diameter on which a first plurality of balls roll thereon;
- a second hybrid ball bearing comprising a second inner ring and a second outer ring, the second outer ring having a second inner diameter on which a second plurality of balls roll thereon;
- wherein one of:
- (1) the first inner ring and the second inner ring, or (2) the first outer ring and the second outer ring are axially aligned and in abutting contact, and the other one of:
- (1) the first inner ring and the second inner ring, or (2) the first outer ring and the second outer ring are axially aligned and spaced so as to define an axial clearance therebetween, wherein the axial clearance is less than or equal to seventy micro-meters (70 μm).
Dependencies are inferred from the claim text.