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Connector

A connector and connected technology, applied in the direction of couplings, clutches, machines/engines, etc., can solve problems such as solution limitations

Active Publication Date: 2013-06-26
WABTEC UK LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this effect can be mitigated to some extent by increasing the initial interference between the parts, this solution is limited for the reasons mentioned above, and it is therefore desirable to achieve a design that ensures that the clamping point Remains in the same position rather than shifting from one end of the Insert to the other

Method used

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Examples

Experimental program
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Embodiment Construction

[0042] first reference figure 1 , the aluminum alloy impeller 1 is assembled to the shaft 2 of the steel turbocharger through a steel connector. The alloy from which this impeller is made (known in the USA under the designation "2618A") has relatively high strength for use at temperatures up to about 200°C, having aluminum with about 2.5 wt.% copper and small amounts of magnesium, iron and nickel components. The connector may be made of high strength steel such as EN26, the composition of which includes about 2.5 wt.% nickel, and is positioned at the hub extension H of the main body of the impeller 1 .

[0043] The shaft 2 is formed at its end with a first shoulder 4 surrounding a cylindrical centering portion 5 and a helical thread portion 7 of further reduced diameter extending from the end of said centering portion. The steel connector has a cup-like insertion portion 3 inserted into a central recess formed in the hub extension H, and a cylindrical sleeve portion 14 surro...

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PUM

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Abstract

A connector for connecting an impeller to a shaft is provided. The connector is formed as a unitary body. The connector has a sleeve portion which is frictionally connected on a radially outer surface of a shaft-side hub extension of the impeller. The connector further has a threaded portion carrying a thread which screws onto a corresponding threaded portion of the shaft, such that the connector provides a rotationally fixed connection between the impeller and the shaft. The hub extension has a central recess, and a part of the connector is inserted into the recess. The frictional connection between the sleeve portion and the radially outer surface of the hub extension transmits, in use, substantially all of the torque between the shaft and the impeller.

Description

technical field [0001] The present invention relates to a connector for connecting an impeller to a shaft, and in particular but not exclusively for connecting an impeller of a turbocharger to the shaft of a turbocharger. Background technique [0002] The wheels of turbochargers are usually made of aluminum alloys to provide a low moment of inertia with reasonable strength at a commercially acceptable cost. The attachment of the impeller to the shaft of the steel turbocharger is accomplished in a number of ways. For example, due to the relative weakness of aluminum and the small diameter of the shaft, one option is to provide the impeller with a steel insert comprising a threaded socket that can be screwed onto the shaft. This arrangement is able to withstand higher torques than a connection where the shaft is screwed directly into the aluminum body (the torque is proportional to the power transmitted through the joint, so the impeller can operate faster than in the case of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/30F01D5/32
CPCF01D5/025F01D5/026F04D29/266F16D1/076F16D1/0847F16D1/0858F16D2300/08
Inventor 伊恩·平科尼奥萨罗巴·法莫斯·奥科华海瑟吉尔保罗·艾婓昂·罗奇尼尔·瑞恩·托马斯伊恩·帕特里克·克莱尔·布朗彼得·凯斯蒂芬·威尔逊大卫·莱斯利·史密斯罗伯特·尼尔·乔治保罗·莱斯利·杰克林杰夫·金保伊·傲凯文·约翰·马森马修·伊利亚·摩尔杰米·克莱尔托马斯·贾拉斯·穆雷斯图尔特·迈克尔·波特克里斯托弗·约翰·莫纳汉阿兰·马丁·泰勒弗朗西斯·约瑟夫·杰弗里·海斯特雷弗·奈顿
Owner WABTEC UK LTD