公开(公告)号：US10014739B2

公开(公告)日：2018-07-03

申请号：US14668146

申请日：2015-03-25

Applicant: TRANE INTERNATIONAL INC.

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

IPC: H02K1/27 ,  H02K1/28 ,  H02K7/00

CPC classification number: H02K1/28 ,  H02K7/003 ,  H02K15/028 ,  H02K2213/03

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.

公开(公告)号：US12215704B2

公开(公告)日：2025-02-04

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

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.

公开(公告)号：US20240077239A1

公开(公告)日：2024-03-07

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 ,  F04D29/057 ,  F25B31/00

CPC classification number: F25B49/022 ,  F04D29/057 ,  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.

公开(公告)号：US11603884B2

公开(公告)日：2023-03-14

申请号：US17314578

申请日：2021-05-07

Applicant: TRANE INTERNATIONAL INC.

Inventor： Robert S. Bakkestuen

IPC: F16C32/06 ,  F16C33/74

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.

公开(公告)号：US20220357087A1

公开(公告)日：2022-11-10

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: F25B49/02

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.