EP0226444A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Variable nozzle turbocharger
Assignee: Honeywell International Inc
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Filing: 1986-12-10
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Granted: —
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Expires: 2006-12-10
Abstract
Abstract A variable nozzle turbocharger has a ring of vanes (34, 134) mounted within the annular passageway (30) through which exhaust gases flow from a volute (28) to the turbine rotor (12). The vanes (34) can pivot on pins (36) mounted in axial bores in a nozzle ring (38) which defines one side of the passageway (30) and is secured to the housing by dowels (55) or bolts (141). The free ends of the vane pins (36) are secured to respective vane arms (46) which have outer ends which can rock in slots (51) on the radially inner surface of a unison ring (48). The unison ring is mounted on rollers (49) on dowels (55) located in relation to the housing and the nozzle ring (38) and can be turned around the nozzle ring (38) by an external crank mechanism (60) to pivot all the vanes (34) together to vary the angle at which the exhaust gases are directed at the turbine rotor. The dowel and roller guides maintain the unison ring (48) concentric with the nozzle ring (38) which is itself concentrically located in relation to the housing.
Inventors
- 👤 Jean-Luc Fleury
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 08:11
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/165; F02; F02B; F02B37/00; F02B37/12; F02B37/24; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
95 words
A turbocharger in which gas is directed through an annular passage (30, 130) to the turbine, including a ring of guide vanes (34) in the annular passage and pivotally mounted on an annular nozzle ring (38, 138) defining one boundary of the annular passage, and an annular unison ring (48, 148) coupled to pivot the vanes by movement of the unison ring in relation to the nozzle ring; characterised by a mounting (55, 59) for the unison ring (48) which provides coaxial location between the nozzle ring and the unison ring about the turbine shaft.
Claim 2
Dependent Claim
95 words
A turbocharger in which gas is directed through an annular passage (30, 130) to the turbine, including a ring of guide vanes (34) in the annular passage and pivotally mounted on an annular nozzle ring (38, 138) defining one boundary of the annular passage, and an annular unison ring (48, 148) coupled to pivot the vanes by movement of the unison ring in relation to the nozzle ring; characterised by a mounting (55, 59) for the unison ring (48) which provides coaxial location between the nozzle ring and the unison ring about the turbine shaft.
Claim 3
Dependent Claim
38 words
A turbocharger as claimed in Claim 1, in which the mounting comprises at least three circumferentially spaced dowels (55, 155) extending between the turbocharger housing and the nozzle ring and a roller (49, 159) mounted on each dowel.
Claim 4
Dependent Claim
22 words
A turbocharger as claimed in Claim 2, in which the periphery of the unison ring is in rolling contact with the rollers.
Claim 5
Dependent Claim
58 words
A turbocharger as claimed in any of the preceding claims, in which the unison ring has a circumferential ring of slots (51), each receiving one end of a vane arm (46), the other end of which is secured to one end of a pin (36) on which a vane (34) is pivotally mounted on the nozzle ring (38).
Claim 6
Dependent Claim
24 words
A turbocharger as claimed in any preceding claim, in which the nozzle ring is capable of axial movement in relation to the turbocharger housing.
Claim 7
Dependent Claim
28 words
A turbocharger as claimed in Claim 5, including a spring (40) for urging the nozzle ring towards a wall of the turbocharger housing defining the annular passage (30).
Claim 8
Dependent Claim
20 words
A turbocharger as claimed in any preceding claim, in which the nozzle ring (138) is mounted from the turbocharger housing.
Claim 9
Dependent Claim
24 words
A turbocharger as claimed in any preceding claim, including linkage means (60) mounted in the turbocharger housing and arranged to move the unison ring.
Claim 10
Dependent Claim
33 words
A turbocharger as claimed in any preceding claim including spacers (30, 130) between the nozzle ring and the opposite wall of the annular passage which are slightly longer axially than the vanes (34).
Claim 11
Dependent Claim
49 words
A turbocharger as claimed in Claim 9, in which the linkage for effecting movement of the unison ring (148) includes a link arm (154) having one end engaging a slot in the periphery of the unison ring (148) and the other end mounted to pivot in the housing (135).
Claim 12
Dependent Claim
51 words
A turbocharger as claimed in Claim 9, in which linkage for moving the unison arm includes a rod (56, 156) rotatably mounted in the turbocharger housing and coupled at one end to a link arm (54, 154) coupled to the unison ring and the other end coupled to external adjusting means.
Claim 13
Dependent Claim
127 words
In a turbocharger having an exhaust gas driven turbine rotatably mounted to a shaft having a compressor impeller thereon, a compressor housing enclosing said compressor impeller, a centre housing including bearing means for rotatably supporting the shaft, a method of assembling the turbocharger comprising; mounting a flange member to the centre housing; pivotably mounting a plurality of vanes to an annular nozzle ring; slidably mounting at least three dowels into at least three bores in said nozzle ring; slidably and rotatably mounting a roller to each dowel; mounting, in rolling contact, an annular unison ring on said rollers; aligning said dowels with bores formed in the flange member and sliding the dowel ends therein ; securing a turbine housing defining a volute therein to the flange emmber.
Claim 14
Dependent Claim
127 words
In a turbocharger having an exhaust gas driven turbine rotatably mounted to a shaft having a compressor impeller thereon, a compressor housing enclosing said compressor impeller, a centre housing including bearing means for rotatably supporting the shaft, a method of assembling the turbocharger comprising; mounting a flange member to the centre housing; pivotably mounting a plurality of vanes to an annular nozzle ring; slidably mounting at least three dowels into at least three bores in said nozzle ring; slidably and rotatably mounting a roller to each dowel; mounting, in rolling contact, an annular unison ring on said rollers; aligning said dowels with bores formed in the flange member and sliding the dowel ends therein ; securing a turbine housing defining a volute therein to the flange emmber.
Claim 15
Independent Claim
120 words
A method of varying the effective flow area of an annular passage in an exhaust gas driven turbocharger comprising the steps of pivotably mounting a plurality of vanes each having a vane arm to a nozzle ring; slidably mounting at least three dowels into at least three bores in said nozzle ring; slidably and rotatably mounting a roller to each dowels; rotatably mounting a unison ring on the rollers; aligning and indexing the vane arms within slots in the unison ring; coaxially locating the nozzle ring and unison ring about the turbocharger shaft; mounting the turbine housing a spaced distance from the nozzle ring thereby forming the annular passage; and pivoting the plurality of vanes in response to operating conditions.
Claim 16
Independent Claim
120 words
A method of varying the effective flow area of an annular passage in an exhaust gas driven turbocharger comprising the steps of pivotably mounting a plurality of vanes each having a vane arm to a nozzle ring; slidably mounting at least three dowels into at least three bores in said nozzle ring; slidably and rotatably mounting a roller to each dowels; rotatably mounting a unison ring on the rollers; aligning and indexing the vane arms within slots in the unison ring; coaxially locating the nozzle ring and unison ring about the turbocharger shaft; mounting the turbine housing a spaced distance from the nozzle ring thereby forming the annular passage; and pivoting the plurality of vanes in response to operating conditions.
References Cited (Backward Citations)
No citation records indexed.
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