A turbocharger comprising a compressor which has a radially extending vaneless diffuser arranged between an impeller and an air discharge chamber. The vaneless diffuser is formed between a first annular surface and a second annular surface which are arranged in parallel to each other. The first annu
A turbocharger comprising a compressor which has a radially extending vaneless diffuser arranged between an impeller and an air discharge chamber. The vaneless diffuser is formed between a first annular surface and a second annular surface which are arranged in parallel to each other. The first annular surface is formed on the center housing of a turbocharger. The second annular surface is formed on an annular separating member which separates the vaneless diffuser from the air discharge chamber. The first annular surface is connected to the inner surface of the air discharge chamber, which is located furthest from the impeller. The first annular surface has a concavely curved portion at the connecting portion of the first annular surface and the inner wall of the air discharge chamber.
대표청구항▼
1. A turbocharger comprising a center housing, a compressor housing fixed onto the center housing, an impeller arranged in the compressor housing, a scroll shaped air discharge chamber formed in the compressor housing around the impeller and having an inner wall defining the air discharge chamber th
1. A turbocharger comprising a center housing, a compressor housing fixed onto the center housing, an impeller arranged in the compressor housing, a scroll shaped air discharge chamber formed in the compressor housing around the impeller and having an inner wall defining the air discharge chamber therein, the inner wall of the air discharge chamber having a cylindrically axially extending inner wall portion which is positioned furthest from the impeller, and a radially extending vaneless diffuser arranged between the impeller and the air discharge chamber, the center housing having a first annular surface which radially extends from the vicinity of the impeller to said inner wall portion of the air discharge chamber, the compressor housing having a radially extending annular separating portion which separates the vaneless diffuser from the air discharge chamber, the annular separating portion having a second annular surface which is arranged parallel to the first annular surface and extends from the vicinity of the impeller to the vicinity of said inner wall portion of the air discharge chamber, the first annular surface and the second annular surface defining the vaneless diffuser therebetween, the first annular surface of the center housing having a concavely curved portion at a position near said inner wall portion of the air discharge chamber, the concavely curved portion gradually curving from the first annular surface towards said inner wall portion of the air discharge chamber, the center housing having a flange portion having the concavely curved portion and a cylindrically extending outer circumferential wall, said inner wall portion of the air discharge chamber having a cylindrically extending inner circumferential wall which is fitted onto the outer circumferential wall of the center housing. 2. A turbocharger as claimed in claim 1, wherein the cylindrically extending inner circumferential wall and the outer circumferential wall are fitted together downstream of the vaneless diffuser. 3. A turbocharger comprising a center housing, a compressor housing fixed onto the center housing, an impeller arranged in the compressor housing, a scroll shaped air discharge chamber formed in the compressor housing around the impeller and having an inner wall defining the air discharge chamber therein, the inner wall of the air discharge chamber having a cylindrically axially extending inner wall portion which is positioned furthest from the impeller, and a radially extending vaneless diffuser arranged between the impeller and the air discharge chamber, the center housing having a first annular surface which radially extends from the vicinity of the impeller to said inner wall portion of the air discharge chamber, the compressor housing having a radially extending annular separating portion which separates the vaneless diffuser from the air discharge chamber, the annular separating portion having a second annular surface which is arranged parallel to the first annular surface and extends from the vicinity of the impeller to the vicinity of said inner wall portion of the air discharge chamber, the first annular surface and the second annular surface defining the vaneless diffuser therebetween, the first annular surface of the center housing having a concavely curved portion at a postion near said inner wall portion of the air discharge chamber, the concavely curved portion gradually curving from the first annular surface towards said inner wall portion of the air discharge chamber, the center housing having a flange portion having the concavely curved portion and a cylindrically extending outer circumferential wall, said inner wall portion of the air discharge chamber having a cylindrically extending inner circumferential wall which is fitted onto the outer circumferential wall of the center housing, the inner circumferential wall of said inner wall portion having a step portion at an inner end thereof, the flange portion having an end face which abuts against the step portion, the end face having a width which is not less than a width of the portion. 4. A turbocharger as claimed in claim 3, wherein the width of the end face is larger than the width of the step portion. 5. A turbocharger as claimed in claim 3, wherein the annular separating portion has a convexly curved tip located nearest the inner wall portion of the air discharge chamber and gradually curving from the second annular surface towards the air discharge chamber. 6. A turbocharger as claimed in claim 3, wherein the concavely curved portion has an arc shaped cross-section. 7. A turbocharger as claimed in claim 6, wherein the arc of the cross-section of the concavely curved portion has a radius which is within one through three times a width of the vaneless diffuser. 8. A turbocharger as claimed in claim 7, wherein the annular separating portion has a tip located nearest the inner wall portion of the air discharge chamber, the center of the radius of the arc being located near the tip of the annular separating portion. 9. A turbocharger as claimed in claim 3, wherein the cylindrically extending inner circumferential wall and the outer circumferential wall are fitted together downstream of the vaneless diffuser.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (1)
Owen Bruce R. (Indianapolis IN), Centrifugal compressor and cover.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.