Centrifugal compressor with fluid injector diffuser
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04D-027/02
F01D-005/14
F01D-017/08
F02C-003/32
F04D-029/44
F04D-029/58
F04D-029/68
출원번호
US-0642240
(2010-11-03)
등록번호
US-10197064
(2019-02-05)
국제출원번호
PCT/US2010/055201
(2010-11-03)
§371/§102 date
20121019
(20121019)
국제공개번호
WO2012/060825
(2012-05-10)
발명자
/ 주소
Sun, Lin
Brasz, Joost
출원인 / 주소
DANFOSS A/S
대리인 / 주소
Carlson, Gaskey & Olds, P.C.
인용정보
피인용 횟수 :
0인용 특허 :
8
초록▼
A centrifugal compressor includes a housing providing in inlet, an impeller, a diffuser and a volute or collector. An electric motor is provided in the housing and is configured to drive at least one impeller via a shaft about an axis. The impeller includes an outlet end aligned with a diffuser and
A centrifugal compressor includes a housing providing in inlet, an impeller, a diffuser and a volute or collector. An electric motor is provided in the housing and is configured to drive at least one impeller via a shaft about an axis. The impeller includes an outlet end aligned with a diffuser and arranged at the throat. A variable fluid injector device is arranged downstream from the outlet end of the impeller in one example. The variable fluid injector device is configured to introduce high pressure fluid downstream from the impeller in response to a compressor regulation command. The injected fluid energizes the low momentum boundary layer, which provides compressor stability. A compressor controller is in communication with the variable fluid injection device to obtain a desired compressor operating condition.
대표청구항▼
1. A centrifugal compressor comprising: a housing providing an inlet and an outlet having a vaneless diffuser and a volute;an electric motor provided in the housing and configured to drive at least one impeller via a shaft about an axis in response to a variable speed command, the impeller including
1. A centrifugal compressor comprising: a housing providing an inlet and an outlet having a vaneless diffuser and a volute;an electric motor provided in the housing and configured to drive at least one impeller via a shaft about an axis in response to a variable speed command, the impeller including an outlet end aligned with the vaneless diffuser;a variable fluid injector device downstream from the impeller outlet end and configured to inject fluid into the outlet in response to a compressor regulation command;a flow control device configured to control flow rate and pressure of injected fluid;a controller in communication with the electric motor and the variable fluid injector device, the controller configured to respectively provide the variable speed command and the compressor regulation command to the electric motor and operatively to the variable fluid injector device to obtain a desired compressor operating condition;wherein the outlet includes a wall having a surface, the variable fluid injector device including multiple injector nozzles provided in the surface and oriented in a direction, the multiple injector nozzles configured to inject fluid into the vaneless diffuser such that fluid flows in the direction as fluid initially enters the vaneless diffuser, and wherein at least one of the multiple injector nozzles is radially spaced-apart, relative to the axis of rotation of the impeller, from at least one other of the multiple injector nozzles; andwherein the direction and an axis of rotation of the impeller are the same. 2. The centrifugal compressor according to claim 1, wherein the variable fluid injector device is arranged immediately adjacent to the outlet end of the impeller. 3. The centrifugal compressor according to claim 1, wherein the impeller is a centrifugal impeller with an axial inlet and the outlet end oriented radially. 4. The centrifugal compressor according to claim 3, wherein the housing provides a fluid inlet upstream from an inlet end of the impeller, the fluid inlet is provided without inlet guide vanes. 5. The centrifugal compressor according to claim 1, comprising a magnetic bearing assembly configured to control position of the shaft relative to the housing in response to a magnetic bearing command. 6. The centrifugal compressor according to claim 1, wherein the controller is configured to regulate a fluid flow rate to the injector nozzles to provide a desired boundary layer at the wall with the compressor regulation command. 7. The centrifugal compressor according to claim 1, wherein the multiple injector nozzles are arranged at a 90 degree angle relative to the surface. 8. The centrifugal compressor according to claim 1, wherein at least some of the multiple injector nozzles are provided on an opposite side of the outlet relative to at least some others of the multiple injector nozzles. 9. The centrifugal compressor according to claim 1, wherein the direction and the axis of rotation of the impeller are parallel. 10. The centrifugal compressor as recited in claim 1, wherein the multiple injector nozzles are configured to inject gas into the vaneless diffuser, and wherein the injected gas has a pressure greater than that of the fluid exiting the impeller. 11. A refrigeration system comprising: a compressor housing providing an inlet and an outlet having a vaneless diffuser and a volute;an electric motor provided in the housing and configured to directly drive at least one impeller via a shaft about an axis in response to a variable speed command, the impeller including an outlet end aligned with the vaneless diffuser;a variable fluid injector device configured to inject refrigerant into the outlet in response to a compressor regulation command;a controller in communication with the electric motor and the variable fluid injector device, the controller configured to respectively provide the variable speed command and the compressor regulation command to the electric motor and operatively to the variable fluid injector device to obtain a desired compressor operating condition;a chiller in fluid communication with the impeller via a refrigerant loop;wherein the outlet includes a wall having a surface, the variable fluid injector device including multiple injector nozzles provided in the surface and oriented in a direction;wherein the direction and an axis of rotation of the impeller are the same; andwherein at least one of the multiple injector nozzles is radially spaced-apart, relative to the axis of rotation of the impeller, from at least one other of the multiple injector nozzles. 12. The refrigeration system according to claim 11, wherein the controller is configured to regulate a refrigerant flow rate to the injector nozzles to provide a desired boundary layer at the surface with the compressor regulation command. 13. The refrigeration system according to claim 11, wherein the impeller is a centrifugal impeller with an axial inlet and the outlet end oriented radially, the housing provides a refrigerant inlet upstream from an inlet end of the impeller, the refrigerant inlet is provided without inlet guide vanes. 14. The refrigeration system according to claim 11, wherein the multiple injector nozzles are arranged at a 90 degree angle relative to the surface. 15. The refrigeration system as recited in claim 11, wherein the multiple injector nozzles are configured to inject gas into the vaneless diffuser. 16. A centrifugal compressor comprising: a housing providing an inlet and an outlet having a vaneless diffuser and a volute, and the housing provides an axial inlet upstream from an inlet end of an impeller, the axial inlet is provided without inlet guide vanes;an electric motor provided in the housing and configured to drive at least one impeller via a shaft about an axis in response to a variable speed command, the impeller including an outlet end aligned with the vaneless diffuser, wherein the impeller is a centrifugal impeller with an axial inlet and the outlet end oriented radially;a variable fluid injector device immediately adjacent to the impeller outlet end and upstream from the volute, and the variable fluid injector device configured to inject fluid into the outlet in response to a compressor regulation command;a controller in communication with the electric motor and the variable fluid injector device, the controller configured to respectively provide the variable speed command and the compressor regulation command to the electric motor and operatively to the variable fluid injector device to obtain a desired compressor operating condition;wherein the outlet includes a wall having a surface, the variable fluid injector device including multiple injector nozzles provided in the surface and oriented in a direction, the multiple injector nozzles configured to inject fluid into the vaneless diffuser such that fluid flows in the direction as fluid initially enters the vaneless diffuser;wherein the direction and an axis of rotation of the impeller are the same;wherein at least one of the multiple injector nozzles is radially spaced-apart, relative to the axis of rotation of the impeller, from at least one other of the multiple injector nozzles; andwherein the multiple injector nozzles are configured to inject gas into the vaneless diffuser. 17. The centrifugal compressor according to claim 16, wherein the multiple injector nozzles are arranged at a 90 degree angle relative to the surface. 18. The centrifugal compressor as recited in claim 16, wherein the injected gas has a pressure greater than that of the fluid exiting the impeller.
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이 특허에 인용된 특허 (8)
Lown Harold (Schenectady NY), Centrifugal compressor with injection of a vaporizable liquid.
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