Centrifugal compressor having switchable two passages
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F04D-027/00
F01D-017/14
F01D-017/00
출원번호
US-0948266
(2007-11-30)
등록번호
US-8118543
(2012-02-21)
우선권정보
JP-P2006-330080 (2006-12-07)
발명자
/ 주소
Umeyama, Ryo
Fujii, Toshiro
Yamada, Kazuho
Ishikawa, Manabu
출원인 / 주소
Kabushiki Kaisha Toyota Jidoshokki
대리인 / 주소
Knoble Yoshida & Dunleavy, LLC
인용정보
피인용 횟수 :
1인용 특허 :
4
초록▼
A centrifugal compressor for compressing gas has a casing, a rotary shaft, an impeller, a diffuser, a first scroll, a second scroll, a first passage, a second passage, and a switching member. The rotary shaft is supported by the casing. The impeller is rotatably fixed to the rotary shaft, and sends
A centrifugal compressor for compressing gas has a casing, a rotary shaft, an impeller, a diffuser, a first scroll, a second scroll, a first passage, a second passage, and a switching member. The rotary shaft is supported by the casing. The impeller is rotatably fixed to the rotary shaft, and sends the gas radially outward to a flow path downstream thereof. The diffuser is formed around the impeller. The first scroll is formed around the diffuser. The second scroll is formed between the diffuser and the impeller. The first passage is formed from the impeller to the first scroll through the diffuser. The second passage is formed from the impeller to the second scroll. The switching member switches the flow path between the first passage and the second passage by opening and closing the diffuser.
대표청구항▼
1. A centrifugal compressor for compressing gas, comprising: a casing;a rotary shaft supported by the casing;an impeller rotatably fixed to the rotary shaft, wherein the impeller sends the gas radially outward to a flow path downstream thereof;a diffuser formed around the impeller and defined by a p
1. A centrifugal compressor for compressing gas, comprising: a casing;a rotary shaft supported by the casing;an impeller rotatably fixed to the rotary shaft, wherein the impeller sends the gas radially outward to a flow path downstream thereof;a diffuser formed around the impeller and defined by a pair of diffuser walls having the diffuser therebetween;a first scroll formed around the diffuser;a second scroll formed between the diffuser and the impeller;a first passage formed from the impeller to the first scroll through the diffuser;a second passage formed from the impeller to the second scroll; anda switching member for switching the flow path between the first passage and the second passage by opening and closing the diffuser, wherein the switching member includes a movable diffuser wall which is at least one of the pair of the diffuser walls, wherein the movable diffuser wall is moved closer to and away from the other of the pair of the diffuser walls so as to switch the flow path between the first passage and the second passage, wherein a wall surface of the movable diffuser wall facing the diffuser includes a diffuser wall surface and a scroll wall forming surface, wherein the scroll wall forming surface forms part of an inner surface of the second scroll. 2. The centrifugal compressor according to claim 1, wherein the diffuser wall surface is formed with a tapered surface so that the cross-sectional area for receiving an internal pressure downstream of the impeller is increased. 3. The centrifugal compressor according to claim 1, wherein the movable diffuser wall is supported by a rotation support plate through a flexible member, wherein the movable diffuser wall is rotatable in the circumferential direction together with the rotation support plate and the flexible member, and is movable in the axial direction of the rotary shaft. 4. The centrifugal compressor according to claim 1, wherein the other of the pair of the diffuser walls is a fixed diffuser wall. 5. The centrifugal compressor according to claim 4, wherein the movable diffuser wall has a movable cam and the fixed diffuser wall has a fixed cam, wherein the movable cam is moved along the fixed cam so that the movable diffuser wall is moved closer to and away from the fixed diffuser wall. 6. The centrifugal compressor according to claim 5, wherein the movable cam includes an inclined portion which has an inclined movable cam surface, and the fixed cam includes an inclined portion which has an inclined fixed cam surface reverse to the inclined movable cam surface, wherein the movable cam and the fixed cam are positioned so that the movable cam surface and the fixed cam surface are continuously in contact with each other. 7. The centrifugal compressor according to claim 4, further comprising an urging member disposed between the movable diffuser wall and the casing, wherein the movable diffuser wall is moved closer to and away from the other of the pair of the diffuser walls by the urging force of the urging member and an internal pressure downstream of the impeller acting on the scroll wall forming surface of the movable diffuser wall. 8. The centrifugal compressor according to claim 1, wherein when the flow rate of the centrifugal compressor exceeds a predetermined level, the switching member switches the flow path so as to form the first passage to open the diffuser, and when the flow rate of the centrifugal compressor is equal or lower than the predetermined level, the switching member switches the flow path so as to form the second passage to close the diffuser.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.