Variable pivot center VTG vanes and vane pack assembly

Patent metadata

Field	Value
Publication number	US-10036274-B2
Application number	US-201314655089-A
Country	US
Kind code	B2
Filing date	Dec 9, 2013
Priority date	Jan 4, 2013
Publication date	Jul 31, 2018
Grant date	Jul 31, 2018

Abstract

A vane pack assembly ( 14 ) for a variable turbine geometry turbocharger is a stand-alone assembly and can be assembled and transported apart from the turbocharger. The vane pack assembly ( 14 ) includes a plurality of guide vanes ( 16 ) spaced apart in a circumferential direction and a plurality of pivot centers ( 38 ). Each one of the pivot centers ( 38 ) corresponds with one of the guide vanes ( 16 ). A location of the pivot centers ( 38 ) relative to the guide vanes ( 16 ) changes as an angular position of the guide vanes ( 16 ) is adjusted.

First claim

What is claimed:

1. A vane pack assembly ( 14 ) for a variable turbine geometry turbocharger, said vane pack assembly ( 14 ) comprising:
a lower vane ring ( 34 );
an upper vane ring ( 36 ) spaced apart from said lower vane ring ( 34 ) in an axial direction,
a plurality of guide vanes ( 16 ) spaced apart in a circumferential direction, wherein said plurality of guide vanes ( 16 ) is disposed in said axial direction between said lower vane ring ( 34 ) and said upper vane ring ( 36 );
a plurality of vane studs ( 38 ) fixedly secured to said lower vane ring ( 34 ), wherein each one of said plurality of vane studs ( 38 ) corresponds with one of said plurality of guide vanes ( 16 ), wherein each of said plurality of guide vanes has an elongated slot ( 26 ), wherein each of said plurality of vane studs ( 38 ) extends in said axial direction through said elongated slot ( 26 ) in its corresponding guide vane ( 16 ), and
an adjustment ring ( 54 ) operatively coupled to the leading edge of each of said plurality of guide vanes ( 16 ) for varying said angular position of said plurality of guide vanes ( 16 ) in response to rotation of said adjustment ring ( 54 );
wherein a location of said plurality of vane studs ( 38 ) relative to said plurality of guide vanes ( 16 ) changes as an angular position of said plurality of guide vanes ( 16 ) is adjusted, wherein said elongated slot ( 26 ) extends between a forward end ( 30 ) and a rearward end ( 32 ), and wherein each of said plurality of vane studs ( 38 ) is disposed at said forward end ( 30 ) of said elongated slot ( 26 ) when said plurality of guide vanes ( 16 ) is in said open position, and wherein each of said plurality of vane studs ( 38 ) is disposed at said rearward end ( 32 ) of said elongated slot ( 26 ) and midway between the leading edge and trailing edge of the vane when said plurality of guide vanes ( 16 ) is in said closed position.

2. The vane pack assembly ( 14 ) as set forth in claim 1 further including:
a fixing ring ( 72 ) adjacent to said adjustment ring ( 54 ), said fixing ring ( 72 ) coupled to said lower vane ring ( 34 ) to retain said vane pack assembly ( 14 ) together.

3. The vane pack assembly ( 14 ) as set forth in claim 1 wherein a straight line connecting a leading edge ( 18 ) and a trailing edge ( 20 ) of each of said plurality of guide vanes ( 16 ) defines a chord length (C), and wherein said plurality of vane studs ( 38 ) is disposed at twenty-five percent of said chord length (C) with said plurality of guide vanes ( 16 ) in said open position, and wherein said plurality of vane studs ( 38 ) is disposed at fifty percent of said chord length (C) with said plurality of guide vanes ( 16 ) in said closed position.

4. The vane pack assembly ( 14 ) as set forth in claim 3 wherein each of said plurality of guide vanes ( 16 ) includes an actuation post ( 22 ) extending in said axial direction, wherein said actuation post ( 22 ) is received in a corresponding bore ( 58 ) in said adjustment ring ( 54 ).

5. A vane pack assembly ( 14 ) for a variable turbine geometry turbocharger, said vane pack assembly ( 14 ) comprising:
a lower vane ring ( 34 );
an upper vane ring ( 36 ) spaced apart from said lower vane ring ( 34 ) in an axial direction,
a plurality of guide vanes ( 16 ) spaced apart in a circumferential direction, wherein said plurality of guide vanes ( 16 ) is disposed in said axial direction between said lower vane ring ( 34 ) and said upper vane ring ( 36 );
a plurality of vane studs ( 38 ) fixedly secured to said lower vane ring ( 34 ), wherein each one of said plurality of vane studs ( 38 ) corresponds with one of said plurality of guide vanes ( 16 ), wherein each of said plurality of guide vanes has an elongated slot ( 26 ), wherein each of said plurality of vane studs ( 38 ) extends in said axial direction through said elongated slot ( 26 ) in its corresponding guide vane ( 16 ), and
an adjustment ring ( 54 ) operatively coupled to the leading edge of each of said plurality of guide vanes ( 16 ) for varying said angular position of said plurality of guide vanes ( 16 ) in response to rotation of said adjustment ring ( 54 );
wherein a location of said plurality of vane studs ( 38 ) relative to said plurality of guide vanes ( 16 ) changes as an angular position of said plurality of guide vanes ( 16 ) is adjusted, wherein said elongated slot ( 26 ) extends between a forward end ( 30 ) and a rearward end ( 32 ), and wherein each of said plurality of vane studs ( 38 ) is disposed at said forward end ( 30 ) of said elongated slot ( 26 ) when said plurality of guide vanes ( 16 ) is in said open position, and wherein each of said plurality of vane studs ( 38 ) is disposed at said rearward end ( 32 ) of said elongated slot ( 26 ) when said plurality of guide vanes ( 16 ) is in said closed position,
wherein a straight line connecting a leading edge ( 18 ) and a trailing edge ( 20 ) of each of said plurality of guide vanes ( 16 ) defines a chord length (C), and wherein said plurality of vane studs ( 38 ) is disposed at twenty-five percent of said chord length (C) with said plurality of guide vanes ( 16 ) in said open position, and wherein said plurality of vane studs ( 38 ) is disposed at fifty percent of said chord length (C) with said plurality of guide vanes ( 16 ) in said closed position,
wherein each of said plurality of guide vanes ( 16 ) includes an actuation post ( 22 ) extending in said axial direction, wherein said actuation post ( 22 ) is received in a corresponding bore ( 58 ) in said adjustment ring ( 54 ),
wherein said upper vane ring ( 36 ) is disposed in said axial direction between said plurality of guide vanes ( 16 ) and said adjustment ring ( 54 ), and wherein said fixing ring ( 72 ) is spaced apart from said upper vane ring ( 36 ) in said axial direction.

6. The vane pack assembly ( 14 ) as set forth in claim 5 wherein each of said plurality of vane studs ( 38 ) includes a vane portion ( 44 ) having a first diameter and an adjusting portion ( 46 ) having a second diameter, wherein said first diameter is larger than said second diameter, thereby defining a shoulder ( 48 ) between said vane portion ( 44 ) and said adjusting portion ( 46 ).

7. The vane pack assembly ( 14 ) as set forth in claim 6 wherein said upper vane ring ( 36 ) abuts said shoulder ( 48 ) of each of said plurality of vane studs ( 38 ) thereby positioning said upper vane ring ( 36 ) in said axial direction relative to said lower vane ring ( 34 ) to control spacing between said lower vane ring ( 34 ) and said upper vane ring ( 36 ), thereby providing clearance for said plurality of guide vanes ( 16 ).

8. The vane pack assembly ( 14 ) as set forth in claim 7 wherein each of said plurality of vane studs ( 38 ) includes a bushing ( 66 ) disposed between said upper vane ring ( 36 ) and said fixing ring ( 72 ), wherein said upper vane ring ( 36 ) abuts a first face ( 78 ) of said bushing ( 66 ) and said fixing ring ( 72 ) abuts a second face ( 80 ) of said bushing ( 66 ), said bushing ( 66 ) positioning said fixing ring ( 72 ) in said axial direction relative to said upper vane ring ( 36 ) to control spacing between said upper vane ring ( 36 ) and said fixing ring ( 72 ), thereby providing clearance for rotational movement of said adjustment ring ( 54 ).

9. The vane pack assembly ( 14 ) as set forth in claim 8 wherein an inner circumference ( 62 ) of said adjustment ring ( 54 ) includes a plurality of notches ( 64 ) spaced apart in said circumferential direction, and wherein said bushing ( 66 ) on each of said plurality of vane studs ( 38 ) is at least partially disposed in one of said plurality of notches ( 64 ).

10. The vane pack assembly ( 14 ) as set forth in claim 9 whe

Assignees

• Borgwarner Inc

Inventors

• Ward Daniel N

Classifications

• F02B37/24

  by using pumps or turbines with adjustable guide vanes · CPC title

• F05D2220/40

  in turbochargers · CPC title

• F01D17/16

  by means of nozzle vanes · CPC title

• F01D17/165 Primary

  for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line (F01D17/167 takes precedence) · CPC title

• Y02T10/144

  Cross-Sectional Technologies · mapped topic