Method for manufacturing a variable capacity exhaust gas turbine
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B21K-025/00
B23P-015/04
출원번호
US-0811530
(2009-08-17)
등록번호
US-8601690
(2013-12-10)
우선권정보
JP-2008-220363 (2008-08-28)
국제출원번호
PCT/JP2009/064400
(2009-08-17)
§371/§102 date
20100712
(20100712)
국제공개번호
WO2010/024145
(2010-03-04)
발명자
/ 주소
Ebisu, Motoki
Yokota, Shingo
출원인 / 주소
Mitsubishi Heavy Industries, Ltd.
대리인 / 주소
Birch, Stewart, Kolasch & Birch, LLP
인용정보
피인용 횟수 :
0인용 특허 :
5
초록▼
A manufacturing method for a variable capacity exhaust gas turbine whereby, a gap in a tongue section allowing exhaust gas to flow into an inner circumferential scroll section can be formed at a minimum, and a cover section near a ring can be mounted with high precision. In the method: exhaust gas t
A manufacturing method for a variable capacity exhaust gas turbine whereby, a gap in a tongue section allowing exhaust gas to flow into an inner circumferential scroll section can be formed at a minimum, and a cover section near a ring can be mounted with high precision. In the method: exhaust gas turbine component members comprise a cover section and a reduced-diameter plate section extending the inner diameter side towards the shaft following the gap between a bearing housing and the turbine rotor; the cover section and the reduced-diameter plate section are integrally formed; a molded surface of the cover section is protruded to form a protrusion corresponding to the tongue section and formed in an intake equivalent portion of the inner circumferential scroll section of the cover section; and the protrusion undergoes cutting, and a cut surface and the tongue section are assembled maintaining the gap.
대표청구항▼
1. A manufacturing method for manufacturing a variable capacity exhaust gas turbine, the gas turbine comprising: a turbine shaft supported by a bearing housing;a turbine rotor that is fixed to an end of the turbine shaft and rotationally driven by exhaust gas;an exhaust gas inlet through which the e
1. A manufacturing method for manufacturing a variable capacity exhaust gas turbine, the gas turbine comprising: a turbine shaft supported by a bearing housing;a turbine rotor that is fixed to an end of the turbine shaft and rotationally driven by exhaust gas;an exhaust gas inlet through which the exhaust gas is supplied;an exhaust gas outlet through which the exhaust gas is discharged; anda turbine housing comprising:a scroll passage between said exhaust gas inlet and said turbine rotor, the cross-section area of the scroll passage gradually reduces along the direction of the exhaust gas stream, the scroll passage is provided with an inner scroll passage and an outer scroll passage into which the scroll passage is divided along a hoop direction around the turbine rotor,a plurality of insert vanes being provided in a row along the boundary between the inner scroll passage and the outer scroll passage, the row of insert vanes being configured so that the exhaust gas flow directly into the inner scroll passage and the exhaust gas flow into the inner scroll passage via the outer scroll passage are controlled, anda control valve that is arranged at an exhaust gas inlet side as to the outer scroll passage so as to control the exhaust gas flow rate into the inner scroll passage as well as into the outer scroll passage, and an opening end face that faces the bearing housing;the gas turbine further comprising:a cover that is arranged at the opening end face of the turbine housing so as to demarcate the inner scroll passage and the outer scroll passage, the insert vanes being provide so as to protrude from the body of the cover toward the side of the exhaust gas passage;wherein, a radius-reducing plate part is extended so as to form an integrated part together with the cover, the cover and the radius-reducing plate part being arranged in a gap between the bearing housing and the turbine rotor, along a plane vertical to the rotation axis of the turbine rotor;the cover and the radius-reducing plate part are formed as an integrated member by means of any one of casting, injection molding, or cold forging;a raw work-piece surface of the cover is provided with a protrusion part in a raw work-piece manufacturing stage so that the protrusion part protrudes from the raw work-piece surface of the cover to a direction near a tongue that is formed in the exhaust gas inlet of the inner scroll passage in the turbine housing as a part thereof, the protrusion part arranged to face the tongue;the integrated member as to the cover and the radius-reducing plate part is assembled into the gas turbine after the protrusion part is machined so that an allowable clearance is formed between the tongue and the protrusion part. 2. The manufacturing method for manufacturing a variable capacity exhaust gas turbine as per claim 1, whereby the integrated member as to the cover and the radius-reducing plate part comprises a connection part between the cover and the radius-reducing plate part, the connection part is provided with a circle ringed protrusion toward the bearing housing, the circle ringed protrusion being formed so that the circle ringed protrusion and the integrated member as to the cover and the radius-reducing plate part form an integrated body in and from the stage of raw work-piece forming;the inner periphery of the circle ringed protrusion is machined in a machining process following to the raw work-piece forming process, so that an outer circle periphery step-surface of the bearing housing is fitted into the inner periphery of the circle ringed protrusion in the stage of the assembling process of the gas turbine, in order that the integrated member as to the cover, the radius-reducing plate part and the connection part is supported by from the bearing housing. 3. The manufacturing method for manufacturing a variable capacity exhaust gas turbine as per claim 2, whereby an outer periphery surface that is an outer circumferential circle surface of the cover is machined;a convex part that is formed around the outer periphery of the cover, in an adjacent neighborhood of the outer periphery surface, thereby convex part sandwiched between the bearing housing and the turbine housing so that the bearing housing and the turbine housing support the cover;the radius-reducing plate part that is extended from the cover in a gap between the turbine housing and the bearing housing toward the rotation axis of the turbine rotor is placed under a free condition without deformation constraint, so that the thermal expansion of the radius-reducing plate becomes allowable.
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이 특허에 인용된 특허 (5)
Komatsu Hiroshi (Yokosuka JPX), Method of producing a turbine casing.
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