CN202348767U

CN202348767U - Compressor impeller of turbocharger

Info

Publication number: CN202348767U
Application number: CN2011205259673U
Authority: CN
Inventors: 周黎; 肖永琴; 骆通
Original assignee: Chongqing Jiangjin Shipbuilding Industry Co Ltd
Current assignee: Chongqing Jiangjin Shipbuilding Industry Co Ltd
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-07-25
Anticipated expiration: 2021-12-15

Abstract

A compressor impeller of a turbocharger comprises an impeller and a spindle. The compressor impeller of the turbocharger is characterized in that a small end hole of the impeller is threaded with the spindle, a big end hole of the impeller is in transition fit with the spindle, and a through hole is arranged between a threaded connection portion and a transition fit portion. According to the compressor impeller of the turbocharger, an internal thread of a small end of the impeller is threaded with the spindle, the big end hole of the impeller is in transition fit with the spindle, the concentric effect of the impeller and the spindle is good, the perpendicularity between the contact surface and the end surface is guaranteed, and the quantity of parts can be reduced, so that the perpendicularity of the whole system is easier to guarantee, unbalance degree caused by high-speed rotations of prior structures are reduced, and consistency in using process is guaranteed.

Description

A kind of compression impellor of turbosupercharger

Technical field

The utility model relates to a kind of compression impellor of turbosupercharger.

Background technique

In recent years, because diesel engine develops to high-performance, energy-saving, high efficiency direction, the structural compactness of turbosupercharger, specious property, safety reliability are all had higher requirement.Compression impellor is the major part that the turbosupercharger high speed is rotated, and the tightness that it is connected with main shaft directly affects the Security of turbosupercharger operation.

The compression impellor of existing turbosupercharger generally adopts wrought aluminium 2618 or AlCuMgNi, forms with the processing mode milling of five-axle linkage, and compression impellor is connected the main shaft end nut that relies on and locks with main shaft.Because main shaft is relatively elongated, its slenderness ratio is about 10:1, is guaranteeing under the qualified situation of moment; The power that applies on the shaft end nut can be because mating parts quantity be too much; Cause it can not vertically act on the shaft axis of main shaft, power thrusts generation deflection makes main shaft produce bending elasticity deformation; When deformation surpasses 0.05mm, will produce significant impact, even possibly cause bearing to burn the high speed operation of main shaft.

The model utility content

The purpose of the utility model is to provide a kind of main shaft that the compression impellor of the turbosupercharger of deformation can not take place.

The purpose of the utility model is to realize like this; A kind of compression impellor of turbosupercharger; Comprise impeller and main shaft; It is characterized in that: the little stomidium of said impeller and main shaft are for being threaded, and the big stomidium of said impeller and main shaft are transition fit, said be threaded and transition fit between be through hole.

The utlity model has following beneficial effect, the utility model is connected the impeller small end with spindle thread, big end of impeller and main shaft transition fit, and impeller is concentric effective with main shaft, has guaranteed the perpendicularity of surface of contact and end face; And number of spare parts can reduce, and makes the perpendicularity of whole system be more prone to guarantee, has reduced the degree of unbalancedness that original structure high-speed rotation produces, and has guaranteed the conformity of using process.

Description of drawings

Fig. 1 is the utility model example structure schematic representation;

Fig. 2 is the utility model embodiment partial schematic diagram.

Embodiment

Embodiment, a kind of compression impellor of turbosupercharger comprises impeller 1 and main shaft 2, the small end hole 4 of impeller 1 and main shaft 2 are for being threaded, the big stomidium 5 and the main shaft 2 of impeller 1 are transition fit 6, be threaded and transition fit 6 between be through hole.

5mm extends on blank in the small end hole 4 of impeller 1; Small end hole 4 changes the internal thread form into by the hole; The big stomidium 5 of impeller 1 improves machining accuracy in the long scope of 8mm; Changing original Spielpassung is transition fit 6, is through hole at the intermediate section that is threaded with transition fit, adopts Spielpassung with main shaft 2.Turbine shaft 3 screw threads need from cooperation, and the 5mm that suitably extends gets final product.

During the rotor assembly assembling, earlier the bearing positioning element is loaded on the main shaft 2, again impeller 1 precession main shaft 2, impeller 1 cooperates afterburning the screw-in with turbine shaft 3, fits until the end face of impeller 1 and the end face of bearing positioning element, applies certain moment again, makes it fastening.

Claims

1. the compression impellor of a turbosupercharger; Comprise impeller (1) and main shaft (2); It is characterized in that: the little stomidium (4) of said impeller (1) and main shaft (2) are for being threaded; The big stomidium (5) of said impeller (1) and main shaft (2) be transition fit (6), said be threaded and transition fit (6) between be through hole.