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A connection structure between an impeller and a turbine shaft

A connection structure, turbine shaft technology, applied in the direction of blade support components, engine components, machines/engines, etc., can solve the problems of time-consuming and expensive manufacturing, low economic benefits of rotor assembly imbalance, and low supercharger life. To achieve the effect of avoiding the risk of rubbing the shell

Inactive Publication Date: 2016-04-20
汉美综合科技(常州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the excessive unbalance of the supercharger rotor assembly in the prior art, the supercharger has low life and poor reliability, and the method of screw connection requires high machining accuracy, time-consuming and expensive manufacturing, Moreover, it cannot be applied to impellers with small outer diameters. A pin-tight shaft impeller and a connection structure between the impeller and the turbine shaft are provided. With the technical solution provided by the present invention, not only is the impeller and the turbine shaft easy to process, but also fast to assemble. , The unbalance of the rotor assembly is low, the economic benefit is high, and the processing size limit of the impeller and the turbine shaft is small, so it can be applied to the impeller with a small outer diameter, and the technical solution of the present invention can effectively improve the performance of the supercharger and extended fatigue life

Method used

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  • A connection structure between an impeller and a turbine shaft
  • A connection structure between an impeller and a turbine shaft
  • A connection structure between an impeller and a turbine shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A pin tight shaft impeller in this embodiment includes blades, a nose cone 106 and a blind hole 102 arranged at the tail section of the impeller 1, the axis of the blind hole 102 coincides with the axis of the impeller 1, and the tail section of the impeller 1 is evenly opened with Three narrow grooves 104, one end of the narrow groove 104 extends to the end of the impeller 1, and the other end is processed with a round hole with a diameter larger than the width of the narrow groove 104, the round hole is conducive to the compression deformation of the tail section of the impeller 1, making the assembly more convenient, higher efficiency. The narrow groove 104 provides a space for the tail section of the impeller 1 to be deformed under pressure, and limits the axial movement of the impeller 1 to the intake end during operation, thereby avoiding the risk of shell rubbing. Compared with the impeller 1 with threaded blind holes, the pin-tight shaft impeller of this embodim...

Embodiment 2

[0052] The basic structure of a pin-tight shaft impeller of this embodiment and the connection structure between the impeller and the turbine shaft is the same as that of embodiment 1, the difference is that four narrow grooves 104 are evenly opened on the tail section of the impeller 1, and the impeller 1 The material is aluminum alloy, and two pairs of parallel surfaces 203 are processed on the shaft end 202 of the turbine shaft 2 .

Embodiment 3

[0054] The basic structure of a pin-tight shaft impeller of this embodiment and the connection structure between the impeller and the turbine shaft is the same as that of embodiment 1, the difference is that six narrow grooves 104 are evenly opened in the tail section of the impeller 1, and the impeller 1 The material is aluminum alloy, and three pairs of parallel surfaces 203 are processed on the shaft end 202 of the turbine shaft 2 .

[0055] When the intermediate rotor assembly assembly in the present invention is assembled, the impeller 1 is vertically pressed down so that the turbine shaft 2 enters the blind hole 102, because both the blind hole 102 and the shaft end 202 of the turbine shaft 2 are provided with chamfers, so the turbine The shaft 2 can easily enter the blind hole 102, and plastically deform the material in the blind hole 102; at this time, the tail section of the impeller 1 enters the inner cavity 701 of the thrust sleeve 7, is squeezed and deformed, and sn...

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Abstract

The invention discloses an inserting pin tightening shaft type impeller and a connecting structure of the impeller and a turbine shaft, and belongs to the technical field of supercharger. The impeller comprises a vane, a nose cone and a blind hole formed in the tail end of the impeller. More than one narrow groove is evenly formed in the tail end of the impeller. One ends of the narrow grooves extend to the tail end of the impeller, and circular holes with the diameters larger than the widths of the narrow grooves are machined in the other ends of the narrow grooves. The connecting structure of the impeller and the turbine shaft comprises the turbine shaft with one end fixedly connected with a turbine, the impeller and a pushing stopping sleeve. The shaft end of the turbine shaft is in interference fit with the blind hole in the impeller. The turbine shaft is provided with annular steps on the portions corresponding to the narrow grooves. An inner cavity of the pushing stopping sleeve is in a cone shape. The inner cavity is arranged at the tail end of the impeller in a sleeved mode. The tail end deforms under pressure and is clamped in the annular steps. According to the connecting structure, the impeller and the turbine shaft are easy to machine and quick to assemble, unbalance amount of a rotor assembly is low, economic benefit is high, machining size limitation of the impeller and the turbine shaft is low, and the connecting structure can be used for the impeller with the small outer diameter.

Description

technical field [0001] The invention relates to an impeller and a connection structure between the impeller and a turbine shaft, more specifically, to a bolt tight shaft type impeller in a supercharger and a connection structure between the impeller and the turbine shaft. Background technique [0002] A supercharger is a device that increases the pressure of the combustible mixture or air entering the cylinder. Such as Figure 4 As shown, the basic principle of the action of the supercharger is that the turbine (6) uses the energy in the exhaust gas of the internal combustion engine to generate rotation, and this movement transfers part of the energy to the impeller connected to the other end of the turbine shaft (2) through the turbine shaft (2) (1), when the impeller (1) rotates in the supercharger, it will push (or compress) the outside air into the internal combustion engine. Due to the effect of compression, the density of air is increased, thereby increasing the intak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D5/06
CPCF04D29/266
Inventor 唐尧
Owner 汉美综合科技(常州)有限公司