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公开(公告)号：US20210079953A1
公开(公告)日：2021-03-18
申请号：US16574239
申请日：2019-09-18
申请人： Aktiebolaget SKF
摘要： A rolling bearing having an inner raceway and an outer raceway and a plurality of rolling elements arranged therebetween. The rolling bearing is media-lubricated or oil-free lubricated. The lubricant forms an elasto-hydrodynamic lubricant film between the rolling elements and the raceways. At first use of the rolling bearing, at least one surface of the rolling bearing is coated with a protective fluid, preferably an oil-based preservative fluid. Also, a refrigerant compressor having such a rolling bearing.
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公开(公告)号：US20190331124A1
公开(公告)日：2019-10-31
申请号：US15962355
申请日：2018-04-25
申请人： Aktiebolaget SKF
发明人： Hans Wallin , Rudolf Hauleitner
IPC分类号： F04D29/056 , F16C33/30 , F16C33/58 , F16C39/02
摘要： 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.
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公开(公告)号：US10280973B1
公开(公告)日：2019-05-07
申请号：US15848868
申请日：2017-12-20
申请人： Aktiebolaget SKF
摘要： A hybrid roller bearing having an inner raceway and an outer raceway and a plurality of rollers arranged therebetween. The inner raceway and the outer raceway are made from bearing steel and have a first surface RMS roughness Rq1. At least one roller is made from a ceramic material and has at least at the roller raceway a second surface RMS roughness Rq2. The roughness of the raceways Rq1 is 1.2 to 4 times higher than the roughness Rq2 of the at least one roller, as well as a refrigerant compressor with such a hybrid roller bearing.
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公开(公告)号：US11835089B2
公开(公告)日：2023-12-05
申请号：US17366158
申请日：2021-07-02
申请人： Aktiebolaget SKF
发明人： Rudolf Hauleitner , Mohamed Sherif
IPC分类号： F16C33/10 , F16C17/02 , C22C38/00 , C21D9/40 , C21D6/00 , C21D1/773 , C21D1/74 , C21D11/00 , C21D1/613 , C21D1/18
CPC分类号： F16C33/1025 , C21D1/18 , C21D1/613 , C21D1/74 , C21D1/773 , C21D6/00 , C21D9/40 , C21D11/00 , C22C38/001 , F16C17/02 , C21D2201/00 , C21D2211/001 , C21D2241/00 , F16C2204/60
摘要： A bearing assembly, particularly refrigerant lubricated bearing assembly, having at least an inner ring and an outer ring, which are rotatable to each other. At least one bearing ring is made from a nitrogen-alloyed stainless steel having a nitrogen (N) content of more than 0.6 wt.-%. A method for manufacturing such a bearing ring is also provided.
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公开(公告)号：US11493243B2
公开(公告)日：2022-11-08
申请号：US16696638
申请日：2019-11-26
申请人： Aktiebolaget SKF
摘要： Disclosed is a cooling system comprising a refrigerant cycle for cycling refrigerant from at least a compressor unit for com-pressing gaseous refrigerant to a condenser unit for condensing gaseous refrigerant to liquid refrigerant, from the condenser unit to an evaporator unit for evaporating the liquid refrigerant to gaseous refrigerant, and from the evaporating unit back to the compressor unit, and a lubrication cycle having at least one lubricating refrigerant supply line for providing refrigerant as lubricant to a bearing assembly, wherein the at least one lubricating refrigerant supply line branches off from the refrigerant cycle at the condenser unit for providing refrigerant to the bearing assembly, and re-unites with the refrigerant cycle at the evaporator unit, for feeding back refrigerant from the bearing assembly to the refrigerant cycle.
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公开(公告)号：US11143236B2
公开(公告)日：2021-10-12
申请号：US16868168
申请日：2020-05-06
申请人： AKTIEBOLAGET SKF
发明人： Hans Wallin , Rudolf Hauleitner
摘要： 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.
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公开(公告)号：US10753396B2
公开(公告)日：2020-08-25
申请号：US16121941
申请日：2018-09-05
申请人： Aktiebolaget SKF
发明人： Rudolf Hauleitner , Guillermo Enrique Morales Espejel , Antonio Gabelli , Aidan Kerrigan , Charlotte Vieillard
IPC分类号： F16C33/30 , F16C33/34 , F16C33/66 , F04D29/059 , F16C33/44 , F16C33/62 , F04D29/049 , F16C33/32 , F16C33/56 , F16C19/54
摘要： A Hybrid rolling bearing includes an inner raceway and an outer raceway and a plurality of rolling elements arranged therebetween. The outer raceway and the inner raceway are made from bearing steel, having a first surface RMS roughness Rq1. The rolling elements are made from a ceramic material and have second surface RMS roughnesses Rq2,i. At least one of the rolling elements has an increased surface RMS roughness Rq2,N, which is significantly higher than the RMS roughnesses Rq2,i, of the remaining rolling elements. The hybrid rolling bearing can be installed within a refrigerant compressor.
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公开(公告)号：US10527094B2
公开(公告)日：2020-01-07
申请号：US16121816
申请日：2018-09-05
申请人： Aktiebolaget SKF
摘要： A Hybrid ball bearing including an outer raceway, an inner raceway, and a plurality of balls arranged between the inner raceway and the outer raceway. The outer raceway and the inner raceway are made from bearing steel and have a first surface RMS roughness Rq1. At least one ball of the plurality of balls is made from a ceramic material and has a second surface RMS roughness Rq2. In a mint condition, the roughness of the raceways Rq1 is 2 to 5 times higher than the roughness Rq2 of the at least one ball, as well as a refrigerant compressor comprising such a hybrid ball bearing.
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公开(公告)号：US10337773B2
公开(公告)日：2019-07-02
申请号：US15347376
申请日：2016-11-09
申请人： Aktiebolaget SKF
摘要： A cooling system includes a refrigerant compressor and a first operating medium, which provides a mixture of refrigerant and lubrication oil. An oil separator reduces the percentage of the refrigerant in the operating medium to a value between 15% by weight and 50% by weight.
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公开(公告)号：US20180100540A1
公开(公告)日：2018-04-12
申请号：US15724742
申请日：2017-10-04
申请人： Aktiebolaget SKF
发明人： Thomas Forster , Rudolf Hauleitner
摘要： An angular contact ball bearing includes an outer ring having an outer diameter D and a first rolling surface and an inner ring having an inner diameter d and a second rolling surface, and no more than one row of balls between the first rolling surface and the second rolling surface, each of the balls having a diameter Dw. The diameter Dw of the balls, the outer diameter D of the outer ring, and the inner diameter d of the inner ring satisfy the relationship: 2 D w D - d > 0.7 .
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