Unlock instant, AI-driven research and patent intelligence for your innovation.

Variable nozzle unit and booster

A nozzle unit, variable technology, applied in the direction of engine components, machines/engines, blade support elements, etc., can solve the problem that variable nozzle blades are difficult to approach the shroud side, etc.

Active Publication Date: 2021-02-26
IHI CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this variable nozzle vane, there is a possibility that a thrust force to be pressed toward the hub side may be applied to the variable nozzle vane.
This thrust makes it difficult for the variable nozzle vanes to approach the shroud side

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Variable nozzle unit and booster
  • Variable nozzle unit and booster
  • Variable nozzle unit and booster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] A variable nozzle unit according to one aspect of the present disclosure is used in a turbine including: a gas inflow passage for passing gas flowing from a swirl flow passage to a turbine impeller; The hub wall surface and the shroud wall surface of the gas inflow path, the variable nozzle unit includes variable nozzle vanes, the variable nozzle vanes are arranged between the hub wall surface and the shroud wall surface, and can be wound around the turbine impeller in the gas inflow path The rotation axis parallel to the rotation axis rotates. The variable nozzle vane includes a leading edge, a trailing edge, a hub end face opposite to the hub wall, and a shroud end face opposite to the shroud wall. The variable nozzle vane is formed around the rear The center of torsion between the rim and the rotation axis is twisted so that the hub end surface protrudes radially outer than the shroud end surface of the rotation axis on the leading edge side, and the hub end surface p...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The variable nozzle unit includes a variable nozzle vane disposed between the hub wall surface and the shroud wall surface and rotatable about a rotation axis parallel to the rotation axis of the turbine wheel in the gas inflow path. The variable nozzle vane includes a leading edge, a trailing edge, a hub end surface facing the hub wall surface, and a shroud end surface facing the shroud wall surface. The variable nozzle vane is configured to be twisted around a twist center located between the trailing edge and the rotation axis so that the hub end surface protrudes radially outward from the rotation axis on the leading edge side compared to the shroud end surface, and the hub end surface projects on the trailing edge side more than the shroud end surface. The end faces protrude radially inward of the axis of rotation.

Description

technical field [0001] The present disclosure relates to a variable nozzle unit and a booster. Background technique [0002] Conventionally, as described in Patent Documents 1 and 2, there are known variable nozzle vanes for varying the flow path area (critical cross-sectional area) of gas flowing into a turbine impeller. The variable nozzle vanes are rotatable about an axis parallel to the axis of rotation of the turbine wheel. The flow path area of ​​the gas can be changed by the rotation of the variable nozzle vane. [0003] The variable nozzle vane described in Patent Document 1 is configured so that the shroud side protrudes radially inward from the hub side and is twisted around the rear edge. Thereby, side clearance flow (Side clearance flow) can be reduced, and the region of energy loss at the inlet side of a turbine wheel can be reduced. The variable nozzle vane described in Patent Document 2 has a shape that is swept in the chord direction, leaned in the warping...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F02B37/24F01D9/02F01D17/16
CPCF01D5/141F01D9/045F01D17/165F02B37/24F05D2220/40F05D2240/121F05D2250/38F01D9/02F01D17/16Y02T10/12F01D9/04
Inventor 元田奈都子
Owner IHI CORP