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US 11,143,236 B2Granted
Hybrid ball bearing pair and a compressor bearing arrangement
AssigneeAktiebolaget Skf
InventorsHans Wallin, Rudolf Hauleitner
Life of this patent
Estimating the term…
Abstract
A pair of hybrid ball bearings have stainless steel rings and ceramic balls and are configured such that when the first inner ring and the first outer ring are in contact with the first plurality of ceramic balls under zero measuring load and zero mounting load and the second inner ring and the second outer ring are in contact with the second plurality of ceramic balls under zero measuring load and zero mounting load a certain gap exists between either the inner rings or the outer rings. The gap is based on the diameter of the inner ring or on the pitch diameter of the balls and on whether the bearings have an X configuration or an O configuration.
Claims16
A pair of hybrid ball bearings comprising:
- a first hybrid ball bearing comprising a first stainless steel inner ring having an inner diameter, a first stainless steel outer ring and a first plurality of ceramic balls between the first inner ring and the first outer ring;
- a second hybrid ball bearing comprising a second stainless steel inner ring having the inner diameter, a second stainless steel outer ring and a second plurality of ceramic balls between the second inner ring and the second outer ring;
- wherein the pair of hybrid ball bearings are configured a) such that when the first inner ring and the first outer ring are in contact with the first plurality of ceramic balls under zero measuring load and zero mounting load and the second inner ring and the second outer ring are in contact with the second plurality of ceramic balls under zero measuring load and zero mounting load, and the first inner ring is in direct contact with the second inner ring, a first gap exists between the first outer ring and the second outer ring or b) such that when the first inner ring and the first outer ring are in contact with the first plurality of ceramic balls under zero measuring load and zero mounting load and the second inner ring and the second outer ring are in contact with the second plurality of ceramic balls under zero measuring load and zero mounting load, and the first outer ring is in direct contact with the second outer ring, a second gap exists between the first inner ring and the second inner ring,
- wherein the first gap and the second gap are related to the inner diameter as follows:
- if the pair of hybrid ball bearings have an X configuration and the inner diameter is less than or equal to 80 mm, the second gap is less than 5 μm or the second gap is between 25 μm and 40 μm;
- if the pair of hybrid ball bearings have the X configuration and the inner diameter is greater than 80 mm and less than or equal to 180 mm, the second gap is less than 20 μm;
- if the pair of hybrid ball bearings have the X configuration and the inner diameter is greater than 180 mm, the second gap is less than 30 μm;
- if the pair of hybrid ball bearings have an O configuration and the inner diameter is less than or equal to 80 mm, the first gap is less than 5 μm or the first gap is between 25 μm and 40 μm;
- if the pair of hybrid ball bearings have the O configuration and the inner diameter is greater than 80 mm and less than or equal to 180 mm, the first gap is less than 20 μm;
- and
- if the pair of hybrid ball bearings have the O configuration and the inner diameter is greater than 180 mm, the first gap is less than 30 μm.
8 more elements
A pair of hybrid ball bearings comprising:
- a first hybrid ball bearing comprising a first stainless steel inner ring having a pitch diameter, a first stainless steel outer ring and a first plurality of ceramic balls between the first inner ring and the first outer ring;
- a second hybrid ball bearing comprising a second stainless steel inner ring having the pitch diameter, a second stainless steel outer ring and a second plurality of ceramic balls between the second inner ring and the second outer ring;
- wherein the pair of hybrid ball bearings are configured a) such that when the first inner ring and the first outer ring are in contact with the first plurality of ceramic balls under zero measuring load and zero mounting load and the second inner ring and the second outer ring are in contact with the second plurality of ceramic balls under zero measuring load and zero mounting load, and the first inner ring is in direct contact with the second inner ring, a first gap exists between the first outer ring and the second outer ring or b) such that when the first inner ring and the first outer ring are in contact with the first plurality of ceramic balls under zero measuring load and zero mounting load and the second inner ring and the second outer ring are in contact with the second plurality of ceramic balls under zero measuring load and zero mounting load, and the first outer ring is in direct contact with the second outer ring, a second gap exists between the first inner ring and the second inner ring,
- wherein the first gap or the second gap is related to the pitch diameter as follows:
- if the pair of hybrid ball bearings have an X configuration and the pitch diameter is less than or equal to 100 mm, the second gap is less than 5 μm or the second gap is between 25 μm and 40 μm;
- if the pair of hybrid ball bearings have the X configuration and the pitch diameter is greater than 100 mm and less than or equal to 200 mm, the second gap is less than 20 μm;
- if the pair of hybrid ball bearings have the X configuration and the pitch diameter is greater than 200 mm, the second gap is less than 30 μm;
- if the pair of hybrid ball bearings have an O configuration and the pitch diameter is less than or equal to 100 mm, the first gap is less than 5 μm or the first gap is between 25 μm and 40 μm;
- if the pair of hybrid ball bearings have the O configuration and the pitch diameter is greater than 100 mm and less than or equal to 200 mm, the first gap is less than 20 μm;
- and
- if the pair of hybrid ball bearings have the O configuration and the pitch diameter is greater than 200 mm, the first gap is less than 30 μm.
8 more elements
Dependencies are inferred from the claim text.