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    Refrigerant circuit compressor gas bearing feed
    2.
    发明授权
    Refrigerant circuit compressor gas bearing feed 有权

    公开(公告)号：US12292219B2

    公开(公告)日：2025-05-06

    申请号：US17929268

    申请日：2022-09-01

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Jacob T. Helgerson ,  Jay H. Johnson ,  Robert S. Bakkestuen

    IPC: F25B49/02 ,  F04D29/05 ,  F04D29/057 ,  F16C32/06 ,  F25B31/00

    Abstract: A method is described for operating a refrigerant circuit that includes a compressor with a driveshaft and one or more gas bearings for supporting the driveshaft. The method includes operating the refrigerant circuit in a first mode which includes supplying gaseous working fluid compressed by the compressor to the one or more gas bearings of the compressor, and the one or more gas bearings using the compressed gaseous working fluid to support the driveshaft. The method includes operating the refrigerant circuit in a second mode which includes supplying liquid working fluid to the one or more gas bearings of the compressor, and the one or more gas bearings using the liquid working fluid to support the driveshaft. A refrigerant circuit includes a compressor, a condenser, an expander, an evaporator, and a controller configured to selectively operate the refrigerant circuit in a least a first mode and a second mode.

    Gas bearing compressor backup power
    3.
    发明授权
    Gas bearing compressor backup power 有权

    公开(公告)号：US11913463B2

    公开(公告)日：2024-02-27

    申请号：US17314534

    申请日：2021-05-07

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Seth M. McGill ,  Charles J. Peterson ,  Robert S. Bakkestuen ,  Kevin P. Hughes

    IPC: F04D27/00 ,  F04D25/06 ,  F04D29/057

    CPC classification number: F04D27/004 ,  F04D25/06 ,  F04D25/068 ,  F04D27/00 ,  F04D27/007 ,  F04D29/057 ,  F04C2240/54

    Abstract: A compressor for a heat transfer circuit includes a variable frequency drive (VFD), an electric motor that rotates a driveshaft, bearing(s) for supporting the driveshaft, a backup gas supply, and a power supply. During a utility power interruption, the backup gas supply operates utilizing DC electrical power generated by a back electromotive force of the electric motor. A method of operating an electric power supply system for a compressor includes operating in a utility power mode and operating in a backup power mode during a utility power interruption. In the utility power mode, AC electrical power is supplied from the VFD to the motor. In the backup power mode, DC electrical power generated in the VFD by a back electromotive force of the motor it used to operate a backup gas supply to supply compressed working fluid to gas bearing(s) of the compressor.

    Methods and systems to mount a rotor to a shaft
    4.
    发明授权
    Methods and systems to mount a rotor to a shaft 有权

    公开(公告)号：US10404117B2

    公开(公告)日：2019-09-03

    申请号：US16025076

    申请日：2018-07-02

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Daniel R. Crum ,  Robert S. Bakkestuen ,  Greg Chilcote ,  Aaron Salesman

    IPC: H02K1/28 ,  H02K15/02 ,  H02K7/00

    Abstract: Methods, systems and apparatuses for mounting a motor rotor to a shaft of a compressor are disclosed. The shaft can include a rib region that is configured to form a press fit or a transition fit with the rotor bore. An end of the shaft can also include a plurality of crenulations that can be expanded outwardly in a radial direction relative to a centerline of the shaft. After the rotor is mounted onto the shaft, the crenulations can be expanded to eliminate the clearance between the shaft and the rotor to form a press fit with the rotor bore.

    GAS BEARING COMPRESSOR BACKUP POWER
    5.
    发明公开
    GAS BEARING COMPRESSOR BACKUP POWER 审中-公开

    公开(公告)号：US20240240644A1

    公开(公告)日：2024-07-18

    申请号：US18587229

    申请日：2024-02-26

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Seth M. McGill ,  Charles J. Peterson ,  Robert S. Bakkestuen ,  Kevin P. Hughes

    IPC: F04D27/00 ,  F04D25/06 ,  F04D29/057

    CPC classification number: F04D27/004 ,  F04D25/06 ,  F04D25/068 ,  F04D27/00 ,  F04D27/007 ,  F04D29/057 ,  F04C2240/54

    Abstract: A compressor for a heat transfer circuit includes a variable frequency drive (VFD), an electric motor that rotates a driveshaft, bearing(s) for supporting the driveshaft, a backup gas supply, and a power supply. During a utility power interruption, the backup gas supply operates utilizing DC electrical power generated by a back electromotive force of the electric motor. A method of operating an electric power supply system for a compressor includes operating in a utility power mode and operating in a backup power mode during a utility power interruption. In the utility power mode, AC electrical power is supplied from the VFD to the motor. In the backup power mode, DC electrical power generated in the VFD by a back electromotive force of the motor it used to operate a backup gas supply to supply compressed working fluid to gas bearing(s) of the compressor.

    GAS BEARING WITH INTEGRAL NON-CONTACTING SEAL
    6.
    发明申请
    GAS BEARING WITH INTEGRAL NON-CONTACTING SEAL 有权

    公开(公告)号：US20220356904A1

    公开(公告)日：2022-11-10

    申请号：US17314578

    申请日：2021-05-07

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Robert S. Bakkestuen

    IPC: F16C32/06

    Abstract: A gas bearing for a compressor includes a bearing portion and a sealing portion mounted to a bearing housing of the compressor via one or more dampers, and the sealing portion being fixedly connected to the bearing portion, and a vent with an inlet in the bearing. The bearing portion has an inner radial surface for radially supporting a shaft of the compressor. The sealing portion has a sealing surface. The inlet of the vent disposed between the inner radial surface and the sealing surface. The sealing surface and a rotating surface form a path that extends along the sealing surface. The path extending from a pressurized volume of the compressor to the vent, and the pressurized volume containing a fluid.

    Lubricant quality management for a compressor
    7.
    发明授权
    Lubricant quality management for a compressor 有权

    公开(公告)号：US10935292B2

    公开(公告)日：2021-03-02

    申请号：US16008883

    申请日：2018-06-14

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Kevin P. Hughes ,  Robert S. Bakkestuen ,  Timothy S. Hagen ,  Keith Adam Novak ,  Daniel R. Dreher ,  Alberto Scala

    IPC: F25B1/047 ,  F25B43/02 ,  F25B49/02 ,  F25B31/00

    Abstract: A heating, ventilation, air conditioning, and refrigeration (HVACR) system is disclosed. The HVACR system includes a refrigerant circuit. The refrigerant circuit includes a compressor, a condenser, an expansion device, and an evaporator fluidly connected. A controller is electronically connected to the compressor. The controller is configured to prevent the compressor from operating at a speed that is less than a minimum speed limit. A lubricant separator has an inlet fluidly connected between the compressor and the condenser and a plurality of outlets. A first of the plurality of outlets is fluidly connected to the condenser. A second of the plurality of outlets is fluidly connected to one or more components of the compressor to provide a lubricant to the one or more components.

    Converting compressor to variable VI compressor
    9.
    发明授权
    Converting compressor to variable VI compressor 有权

    公开(公告)号：US10883744B2

    公开(公告)日：2021-01-05

    申请号：US16006392

    申请日：2018-06-12

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Jay H. Johnson ,  Robert S. Bakkestuen

    IPC: F04B13/00 ,  F25B1/02 ,  F25B1/047 ,  F25B31/00 ,  F04B39/14 ,  F04D3/02 ,  F04C18/16 ,  F04C28/12 ,  F04C28/26

    Abstract: A screw compressor is disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed; a compression mechanism fluidly connected to the suction inlet that compresses the working fluid; a discharge outlet fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism; wherein the compression mechanism fluidly communicates with one or more outlets disposed at an intermediate location between the suction inlet and the discharge outlet, the one or more outlets being selectively fluidly connectable to the discharge outlet such that the working fluid can be provided from the one or more outlets to the discharge outlet.

    REFRIGERANT GAS COOLING OF MOTOR AND MAGNETIC BEARINGS
    10.
    发明申请
    REFRIGERANT GAS COOLING OF MOTOR AND MAGNETIC BEARINGS 审中-公开

    公开(公告)号：US20190063461A1

    公开(公告)日：2019-02-28

    申请号：US15873560

    申请日：2018-01-17

    Applicant: TRANE INTERNATIONAL INC.

    Inventor： Christopher Espelien ,  Joseph M. Heger ,  Daniel A. Strange ,  Russell T. Abbott ,  Robert S. Bakkestuen

    IPC: F04D29/58 ,  F04D29/058

    Abstract: A variable orifice flow device controls the flow of refrigerant into a compressor motor housing in a compressor. The variable orifice flow device may include, for example, an electronic expansion valve, a thermal expansion valve, or a shuttling valve controlling the flow of refrigerant into a compressor motor housing. One or more flows of refrigerant may be through a fixed orifice, a valve seat of the variable orifice flow device, or leakage through a seal of the compressor motor housing, providing a baseline refrigerant flow to the inside of the compressor motor housing in addition to the flow through the variable orifice flow device.

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