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Bi-arc self-locking interference threaded connection method and structure for titanium aluminum turbine and spindle

A threaded connection, double arc technology, applied in the direction of the blade supporting element, tangent machine, mechanical equipment, etc., to achieve the effect of increasing the contact area, improving the connection strength, and the structure and process are simple

Active Publication Date: 2013-09-25
CHINA NORTH ENGINE INST TIANJIN
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the connection problem between the titanium-aluminum turbine impeller and the 42CrMo rotating shaft faced by the current titanium-aluminum alloy material in the application process of the supercharger turbine, and proposes a double-arc self-locking interference thread between the titanium-aluminum supercharger turbine impeller and the rotating shaft Connection method and connection structure

Method used

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  • Bi-arc self-locking interference threaded connection method and structure for titanium aluminum turbine and spindle
  • Bi-arc self-locking interference threaded connection method and structure for titanium aluminum turbine and spindle

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Embodiment Construction

[0021] combined with figure 1 The method and structure of the double-arc self-locking interference screw connection between the turbine and the rotating shaft are described in detail.

[0022] A double-arc self-locking interference thread connection structure between a titanium-aluminum turbine and a rotating shaft, including a rotating shaft and a turbine impeller, the end of the rotating shaft has a double-arc self-locking external thread, and the connection between the turbine impeller and the rotating shaft has a The double-arc self-locking internal thread with double-arc thread interference fit, the interference ratio of the internal and external thread is 0.005-0.009.

[0023] The thread interference ratio refers to the ratio of the interference amount to the nominal diameter of the thread.

[0024] Preferably, the internal and external threads of the double-arc interference thread connection structure between the turbine impeller and the rotating shaft adopt a thread l...

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Abstract

The invention relates to a bi-arc self-locking interference threaded connection method and structure for a titanium aluminum turbine and a spindle. By designing the size, the interference magnitude and assembly technological parameters of a bi-arc self-locking interference threaded connection structure for a titanium aluminum supercharger turbine impeller and a 42 CrMo spindle, machining is performed on turbine impeller internal bi-arc threads and a matching end surface as well as spindle external bi-arc threads and a matching end surface. A turbine impeller heating measure is taken, assembly for the titanium aluminum turbine impeller and the 42 CrMo spindle is achieved through thread screwing, and machining is performed on other positions of the connected titanium aluminum spindle. By means of the connection method and structure, lasting reliable connection between the titanium aluminum turbine impeller and the 42 CrMo alloy spindle is achieved, connection strength requirements are met, the structure and the technology are simple, and the engineering application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of turbocharging, and in particular relates to a double-arc self-locking interference screw connection method and a connection structure of a titanium-aluminum supercharger turbine impeller and a rotating shaft. Background technique [0002] The turbine shaft is one of the core components of the turbocharger, which is formed by connecting the turbine impeller and the shaft. At present, the turbine impeller of diesel engine supercharger for vehicles generally adopts a density of 8.0×10 3 kg / m 3 The cast nickel-based superalloy K418 material is used, and the shaft is made of 42CrMo alloy steel material. For the turbocharger turbine impeller made of K418 material and the shaft made of 42CrMo alloy steel, the friction welding process can be used to realize the reliable connection between the turbine impeller and the shaft to form the turbine shaft. However, due to the high density of K418 material, the moment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23G1/32F01D5/02
Inventor 王正王增全王晋伟何洪张宇飞
Owner CHINA NORTH ENGINE INST TIANJIN
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