公开(公告)号：US11560900B2

公开(公告)日：2023-01-24

申请号：US16946173

申请日：2020-06-09

Applicant: Emerson Climate Technologies, Inc.

Inventor： Jason Wilkes ,  Zheji Liu

IPC: F04D29/053 ,  F04D29/28 ,  F04D29/26 ,  F04D29/051 ,  F04D29/056

Abstract: A compressor system includes a compressor housing and a driveshaft rotatably supported within the compressor housing. The compressor system further includes an impeller that imparts kinetic energy to incoming refrigerant gas upon rotation of the driveshaft, a thrust disk coupled to the driveshaft, and a bearing assembly mounted to the compressor housing. The impeller includes an impeller bore having an inner surface, and the thrust disk includes an outer disk and a hub. The bearing assembly rotatably supports the outer disk of the thrust disk. The hub is disposed within the impeller bore, and includes a hub outer surface in contact with the inner surface of the impeller bore. A first contact force between the hub outer surface and the inner surface of the impeller bore increases with increased rotational speed of the driveshaft.

公开(公告)号：US20230235935A1

公开(公告)日：2023-07-27

申请号：US17585736

申请日：2022-01-27

Applicant: Emerson Climate Technologies, Inc.

Inventor： Michael M. Perevozchikov ,  Matthew J. Swallow ,  Zheji Liu

IPC: F25B49/02 ,  F25B31/02 ,  F04D27/02

CPC classification number: F25B49/022 ,  F25B31/026 ,  F04D27/0246 ,  F25B2600/022 ,  F25B2600/0253 ,  F25B2700/193

Abstract: A system includes a dynamic compressor and a controller having a processor and a memory. The compressor includes a first compressor stage having a first variable inlet guide vane (VIGV) and a second compressor stage having a second VIGV. The memory stores instructions that program the processor to operate the compressor at a current speed, a first position of the first VIGV, and a second position of the second VIGV to compress the working fluid, and to determine if a condition is satisfied. If the condition is not satisfied, the processor is programmed to continue to operate the compressor at the current speed, the first position of the first VIGV, and the second position of the second VIGV. If the condition is satisfied, the processor is programmed to change the second position of the second VIGV to a third position and maintain the first position of the first VIGV.

公开(公告)号：US20220243762A1

公开(公告)日：2022-08-04

申请号：US17167611

申请日：2021-02-04

Applicant: Emerson Climate Technologies, Inc.

Inventor： Zheji Liu ,  Michael M. Perevozchikov

IPC: F16C17/02 ,  F16C43/02 ,  F04D29/057

Abstract: A bearing system includes a bearing housing and a foil bearing assembly. The bearing housing includes a sleeve that defines a cylindrical bore and includes at least one bearing assembly locking feature, and a mounting structure. The foil bearing assembly includes an outer foil assembly, an inner foil assembly, and a bump foil assembly positioned between the outer foil assembly and the inner foil assembly. The outer foil assembly includes at least one outer foil pad that extends circumferentially from a first end including a bearing retention feature to a second end. The bearing retention feature is cooperatively engaged with the at least one bearing assembly locking feature. The inner foil assembly includes a plurality of circumferentially-spaced inner foil pads. Each inner foil pad extends circumferentially from a tab to a free end. At least one inner foil pad is welded to the outer foil assembly along the tab.

公开(公告)号：US11686341B2

公开(公告)日：2023-06-27

申请号：US17167611

申请日：2021-02-04

Applicant: Emerson Climate Technologies, Inc.

Inventor： Zheji Liu ,  Michael M. Perevozchikov

IPC: F16C17/02 ,  F16C43/02 ,  F04D29/05 ,  F04D29/057

CPC classification number: F16C17/024 ,  F04D29/057 ,  F16C43/02

Abstract: A bearing system includes a bearing housing and a foil bearing assembly. The bearing housing includes a sleeve that defines a cylindrical bore and includes at least one bearing assembly locking feature, and a mounting structure. The foil bearing assembly includes an outer foil assembly, an inner foil assembly, and a bump foil assembly positioned between the outer foil assembly and the inner foil assembly. The outer foil assembly includes at least one outer foil pad that extends circumferentially from a first end including a bearing retention feature to a second end. The bearing retention feature is cooperatively engaged with the at least one bearing assembly locking feature. The inner foil assembly includes a plurality of circumferentially-spaced inner foil pads. Each inner foil pad extends circumferentially from a tab to a free end. At least one inner foil pad is welded to the outer foil assembly along the tab.

公开(公告)号：US11644227B2

公开(公告)日：2023-05-09

申请号：US17009535

申请日：2020-09-01

Applicant: Emerson Climate Technologies, Inc.

Inventor： Michael D. Oakley ,  Zheji Liu ,  Michael M. Perevozchikov ,  Matthew J. Swallow

IPC: F25B49/02 ,  F25B41/20 ,  F25B31/02

CPC classification number: F25B49/025 ,  F25B31/026 ,  F25B41/20 ,  F25B2400/07 ,  F25B2600/026 ,  F25B2600/0251 ,  F25B2600/0253 ,  F25B2600/2501 ,  F25B2700/151 ,  F25B2700/171 ,  F25B2700/19

Abstract: An HVAC system includes an unloading device, a centrifugal compressor, a gas foil bearing, a VFD and a controller. The controller is programmed to start the centrifugal compressor from a stopped condition by operating the unloading device to remove a load from the centrifugal compressor, accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor, running the motor for a period of time, operating the unloading device to apply the load to the centrifugal compressor, and accelerating the motor to the operating speed.

公开(公告)号：US20220065513A1

公开(公告)日：2022-03-03

申请号：US17009535

申请日：2020-09-01

Applicant: Emerson Climate Technologies, Inc.

Inventor： Michael D. Oakley ,  Zheji Liu ,  Michael M. Perevozchikov ,  Matthew J. Swallow

IPC: F25B49/02 ,  F25B31/02 ,  F25B41/04

Abstract: An HVAC system includes an unloading device, a centrifugal compressor, a gas foil bearing, a VFD and a controller. The controller is programmed to start the centrifugal compressor from a stopped condition by operating the unloading device to remove a load from the centrifugal compressor, accelerating the motor to a first speed above a liftoff speed of the gas foil bearing and below an operating speed of the centrifugal compressor, running the motor for a period of time, operating the unloading device to apply the load to the centrifugal compressor, and accelerating the motor to the operating speed.

公开(公告)号：US20210381522A1

公开(公告)日：2021-12-09

申请号：US16946173

申请日：2020-06-09

Applicant: Emerson Climate Technologies, Inc.

Inventor： Jason Wilkes ,  Zheji Liu

IPC: F04D29/26 ,  F04D29/28 ,  F04D29/053

Abstract: A compressor system includes a compressor housing and a driveshaft rotatably supported within the compressor housing. The compressor system further includes an impeller that imparts kinetic energy to incoming refrigerant gas upon rotation of the driveshaft, a thrust disk coupled to the driveshaft, and a bearing assembly mounted to the compressor housing. The impeller includes an impeller bore having an inner surface, and the thrust disk includes an outer disk and a hub. The bearing assembly rotatably supports the outer disk of the thrust disk. The hub is disposed within the impeller bore, and includes a hub outer surface in contact with the inner surface of the impeller bore. A first contact force between the hub outer surface and the inner surface of the impeller bore increases with increased rotational speed of the driveshaft.

公开(公告)号：US11306726B2

公开(公告)日：2022-04-19

申请号：US16809836

申请日：2020-03-05

Applicant: Emerson Climate Technologies, Inc.

Inventor： Michael M. Perevozchikov ,  Chris N. Siefring ,  Craig F. Robillard ,  Zheji Liu

IPC: F04D29/046 ,  F04D29/053 ,  F04D29/60 ,  F16C17/02 ,  F16C33/06 ,  F16C33/10 ,  F16C25/02 ,  F04D29/056 ,  F16C43/02

Abstract: A bearing system includes a bearing housing that includes a sleeve and a mounting structure for connecting the bearing system to a compressor housing. The sleeve has a radial inner surface that defines a cylindrical bore, and includes a locking feature located along the radial inner surface. The mounting structure is located radially outward from the sleeve. The bearing system also includes a foil bearing assembly positioned within the cylindrical bore. The foil bearing assembly includes an outer foil, an inner foil, and a bump foil positioned between the outer foil and the inner foil. At least one of the outer foil and the inner foil includes a bearing retention feature cooperatively engaged with the locking feature to maintain the foil bearing assembly within the bearing housing at a fixed rotational position.

公开(公告)号：US20200291953A1

公开(公告)日：2020-09-17

申请号：US16809836

申请日：2020-03-05

Applicant: Emerson Climate Technologies, Inc.

Inventor： Michael M. Perevozchikov ,  Chris N. Siefring ,  Craig F. Robillard ,  Zheji Liu

IPC: F04D29/046 ,  F04D29/053 ,  F04D29/60 ,  F16C17/02 ,  F16C33/06

Abstract: A bearing system includes a bearing housing that includes a sleeve and a mounting structure for connecting the bearing system to a compressor housing. The sleeve has a radial inner surface that defines a cylindrical bore, and includes a locking feature located along the radial inner surface. The mounting structure is located radially outward from the sleeve. The bearing system also includes a foil bearing assembly positioned within the cylindrical bore. The foil bearing assembly includes an outer foil, an inner foil, and a bump foil positioned between the outer foil and the inner foil. At least one of the outer foil and the inner foil includes a bearing retention feature cooperatively engaged with the locking feature to maintain the foil bearing assembly within the bearing housing at a fixed rotational position.