A device for controlling the pivoting blades of a turbine

A technology for control devices and turbines, which is applied to components, mechanical equipment, engine components, etc. of elastic fluid pumping devices. low cost effect

Active Publication Date: 2015-12-09
TURBOMECA SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The action of this type of device is very complex and very precise, such that if the precision clearances are not met, the device will be statically indeterminate (ie it will jam)
In particular, this means that the positioning and centering of the ring sections with respect to the turbine axis is severely restricted
For this reason, even slight deviations from these positions can quickly cause very high stresses on the entire control unit, which in turn can cause it to jam
This centering (or, more generally, positioning) problem is further exacerbated by differences in thermal expansion between the various components of the control

Method used

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  • A device for controlling the pivoting blades of a turbine
  • A device for controlling the pivoting blades of a turbine
  • A device for controlling the pivoting blades of a turbine

Examples

Experimental program
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Embodiment Construction

[0038] figure 1 An embodiment of the control device of the invention for controlling pivoting blades of a turbomachine is shown. In this embodiment, the blades are oriented radially with respect to the turbine axis. The schematic diagram shown is a partial one, the whole arrangement extending 360° around the axis A of the turbine (not shown). This axis A forms the longitudinal direction. The radial and azimuthal directions are determined with respect to the axis A.

[0039] The control unit 10 includes a plurality of vanes 12 pivotally mounted on a stator 14 . The pivot axis B of each blade 12 is oriented in a radial direction. Each blade 12 is mounted on the stator 14 by a pivot-only connection 23 (ie pivot connection) in which the only movement (or degree of freedom) allowed is a rotational movement about the axis B.

[0040] Each blade 12 is connected to a control ring 16 by a connecting rod. Each rigid link 18 connects the blade 12 to the control ring 16 by a ball jo...

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PUM

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Abstract

A control device for controlling pivotable vanes of a turbo-machine, including: a plurality of pivotable vanes distributed in azimuth over at least 90° around the axis of the turbo-machine, the pivotable vanes being oriented substantially radially relative to the axis of the turbo-machine; and a control ring portion for controlling pivoting of the vanes, each vane being connected to the control ring portion by a link, the control ring portion being held around the axis of the turbo-machine by the links; wherein at least two of the links are connected to the ring portion by respective ball-joint connections, with other links being connected to the ring portion via respective sliding pivot connections.

Description

technical field [0001] This invention relates to a device for controlling pivoting blades of a turbomachine, and in particular, to a device for controlling pivoting blades in a synchronized manner. Background technique [0002] In turbines it is known to employ one or more stages of stator blades in order to direct the gas flow and gas flow through the compression section according to the operating speed of the turbine. These stator blade stages comprise a plurality of blades (also known as variable pitch blades) that are pivotable about an axis connecting them to the stator so that their pitch angle can be modified according to the turbine operating speed. [0003] Known devices for controlling the pivoting blades of a turbine generally comprise a plurality of pivotable blades distributed azimuthally at an angle of at least 90° around the turbine axis, the pivotable blades being generally radially oriented with respect to the turbine axis, and a control blade pivot Each bl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D17/16
CPCF01D17/16F01D17/162Y02T50/671Y02T50/60F05D2220/40Y02T10/12F04D29/563
Inventor 克里斯托弗·科莱特伯纳德·利安娜
Owner TURBOMECA SA
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