Composite turbocharger turbine shaft and its processing and assembling method

A turbocharger, composite technology, applied in other manufacturing equipment/tools, shafts, shafts and bearings, etc., can solve the problem of insufficient guarantee of the connection strength of the turbine shaft

Active Publication Date: 2018-03-13
CHINA NORTH ENGINE INST TIANJIN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the turbine impeller of the turbocharger is made of new materials such as titanium-aluminum alloy and ceramics, it is difficult to directly use the welding process to achieve a reliable connection between the turbine impeller and the shaft, and the connection strength of the turbine shaft cannot be effectively guaranteed

Method used

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  • Composite turbocharger turbine shaft and its processing and assembling method
  • Composite turbocharger turbine shaft and its processing and assembling method
  • Composite turbocharger turbine shaft and its processing and assembling method

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] Compound supercharger turbine shaft structure, such as Figures 1 to 4 As shown, it includes a rotating shaft 1, a transition sleeve 2, a turbine impeller 3 and a pin 4. One end of the rotating shaft 1 has an annular boss welded with the transition sleeve 2; the transition sleeve 2 can be connected to the rotating shaft 1 through a welding process One end of the transition sleeve 2 has an annular boss welded with the rotating shaft 1, the other end of the transition sleeve 2 has a threaded blind hole assembled with the turbine impeller 3, and the bottom of the threaded blind hole of the transition sleeve 2 There are through holes for installing pins 4 evenly distributed along the...

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Abstract

The invention provides a composite supercharger turbine rotating shaft and a machining assembly method thereof. The composite supercharger turbine rotating shaft comprises a rotating shaft body, a transition sleeve, a turbine impeller and a pin and is characterized in that a material which can be connected with the rotating shaft body together through a welding process is selected by the transition sleeve, the transition sleeve and the turbine impeller are connected together in a screw-assembly manner, the pin is mounted on the transition sleeve and the turbine impeller which have being in screw assembly, locking of a screw-connection structure of the transition sleeve and the turbine impeller is achieved, the rotating shaft body and the transition sleeve are connected together through welding of an annular boss, and therefore the complete turbine rotating shaft is formed. Two connecting manners of the screw structure and welding are comprehensively applied by the turbine rotating shaft, reliable connection between the turbine impeller and the rotating shaft body can be achieved, the connection aim of the turbine impeller made of a new material and the rotating shaft body is achieved, and the reliability of the supercharger turbine rotating shaft is improved.

Description

technical field [0001] The invention belongs to the technical field of supercharger structures, and in particular relates to a composite supercharger turbine shaft and a processing and assembling method thereof. Background technique [0002] The turbine shaft is one of the core parts of the turbocharger, usually connected by the turbine wheel and the shaft. At present, the turbine impeller of the diesel engine supercharger is generally made of cast nickel-based superalloy K418 material (the material density is 8.0×10 3 kg / m 3 ), the shaft is made of 42CrMo alloy steel. For the turbocharger turbine impeller made of K418 material and the shaft made of 42CrMo alloy steel, friction welding or electron beam welding can be used to directly connect the turbine impeller and the shaft to form the turbine shaft. However, due to the high density of K418 material, the moment of inertia of the turbine impeller made of K418 material is also large, resulting in poor transient response o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P23/04B23P15/00F16C3/02
CPCB23P15/00B23P23/04F16C3/02
Inventor 王正王增全王阿娜何洪刘烨
Owner CHINA NORTH ENGINE INST TIANJIN
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