中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

9 records (took 0.017 seconds)

    FOIL BEARING LUBRICATION
    1.
    发明申请
    FOIL BEARING LUBRICATION 有权

    公开(公告)号：US20210404720A1

    公开(公告)日：2021-12-30

    申请号：US17303963

    申请日：2021-06-11

    Applicant: Carrier Corporation

    Inventor： Vishnu M. Sishtla ,  Yifan Qiu

    IPC: F25B49/02 ,  F25B31/02 ,  F25B29/00 ,  F25B31/00

    Abstract: A compressor assembly, a vapor compression system incorporating the same, and a method for operating the vapor compression system are provided. The compressor assembly includes a motor for driving a rotating shaft, a foil bearing for supporting the rotating shaft, a compression mechanism for increasing the pressure of a working fluid, a supply line in fluid communication with the compression mechanism, and a heating apparatus for heating the working fluid. The supply line is configured for injecting the working fluid (e.g., from downstream of the compression mechanism) toward the foil bearing. The method provides for the monitoring of the temperature of the working fluid. When the temperature of the working fluid is less than 3° F. of superheat it is heated prior to being injected toward the foil bearing. The heating of the working fluid prevents, or at least mitigates, liquid from being transferred to the foil bearing.

    Direct drive refrigerant screw compressor with refrigerant lubricated bearings
    2.
    发明授权
    Direct drive refrigerant screw compressor with refrigerant lubricated bearings 有权

    公开(公告)号：US11959484B2

    公开(公告)日：2024-04-16

    申请号：US16973710

    申请日：2020-05-20

    Applicant: Carrier Corporation

    Inventor： Yifan Qiu ,  David M. Rockwell ,  Amit Vaidya

    IPC: F04C29/02 ,  F04C18/16 ,  F25B31/00

    CPC classification number: F04C29/02 ,  F04C18/16 ,  F25B31/002 ,  F04C2240/20 ,  F04C2240/30 ,  F04C2240/50

    Abstract: Disclosed is a direct-drive refrigerant screw compressor, having: a housing; a compression chamber in the housing; a pair of rotors, each rotor of the pair of rotors being rotationally disposed in the compression chamber and including an outer surface with a screw-geared profile; wherein, for each rotor, the compressor includes: a plurality of bearing packs disposed within a respective plurality of bearing chambers; a working fluid disposed within each of the plurality of bearing chambers, the working fluid providing oil-free lubrication to the plurality of bearing packs; a plurality of bearing lubrication ports extending through the housing and into each of the plurality of bearing chambers, and configured for injecting the working fluid into each of the plurality of bearing chambers when the compressor is running.

    Screw compressor with oil shutoff and method
    6.
    发明授权
    Screw compressor with oil shutoff and method 有权

    公开(公告)号：US10288070B2

    公开(公告)日：2019-05-14

    申请号：US15524097

    申请日：2015-11-17

    Applicant: Carrier Corporation

    Inventor： Masao Akei ,  Yifan Qiu

    IPC: F04C29/02 ,  F04C29/00 ,  F04C18/16 ,  F04C23/00 ,  F04C18/20 ,  F25B1/047 ,  F25B31/00

    Abstract: In a screw compressor (20), a male rotor suction end bearing (96) and discharge end bearing (90 1, 90 2, 90 3) mount the male rotor suction end shaft portion (39) and discharge end shaft portion (40). A female rotor suction end bearing (98) and discharge end bearing (92 1, 92 2) mount the female rotor suction end shaft portion (41) and discharge end shaft portion (42). At least one valve (182; 282; 382 1,382 2,382 3; 82; 582-1,582-2; 682-1,682-2; 782-1,782-2) is along a lubricant flowpath and has an energized condition and a de-energized condition. At least one restriction (184; 84-1,84-2; 84-1, 84-2,84-3; 484 1,484-2,84-3; 84 1,84 2,584; 84-1,84-2,684; 84-1,84-2,784) is along the lubricant flowpath. The at least one valve and the at least one restriction are positioned to create a lubricant pressure difference biasing the rotors away from a discharge end of the case.

Patent Agency Ranking