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US 12,601,373 B2Granted
Refrigerant compressor including grooved auxiliary bearing interface
AssigneeDanfoss A/S
InventorsJin Yan, Karthik Krishna
Life of this patent
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Abstract
A refrigerant compressor may include an auxiliary bearing arranged about a shaft. An interface of the auxiliary bearing and the shaft includes at least one groove.
Claims15
A refrigerant compressor, comprising:
- an auxiliary bearing arranged about a shaft, wherein an interface of the auxiliary bearing and the shaft includes at least one groove;
- and
- a magnetic bearing assembly including a plurality of magnetic bearings, wherein the magnetic bearings are configured to create a magnetic field to levitate the shaft during operation of the refrigerant compressor, wherein the auxiliary bearing is not a magnetic bearing, wherein, when the magnetic bearing assembly holds a radial load of the shaft, the auxiliary bearing is not in contact with the shaft and rotation of the auxiliary bearing brought about by forces of refrigerant adjacent the auxiliary bearing is resisted by the at least one groove.
A refrigerant compressor, comprising:
- an auxiliary bearing arranged about a shaft, wherein an interface of the auxiliary bearing and the shaft includes at least one groove,
- wherein the auxiliary bearing is a rotary bearing and includes an inner race, an outer race, and a plurality of rollers, and
- wherein the interface of the auxiliary bearing and the shaft includes (i) a first plurality of grooves formed in the inner race and (ii) a second plurality of grooves formed in the shaft.
An auxiliary bearing configured to be arranged relative to a shaft of a refrigerant compressor, comprising:
- an inner race,
- an outer race, and
- a plurality of rollers,
- wherein the inner race includes a plurality of grooves, wherein each of the grooves is axially spaced-apart from one another, and wherein each of the grooves is recessed inwardly relative to the inner race by a distance about 25% of a radial dimension of the inner race.
1 more element
Dependencies are inferred from the claim text.