CN203051216U

CN203051216U - Fan impeller

Info

Publication number: CN203051216U
Application number: CN 201320077703
Authority: CN
Inventors: 王勇
Original assignee: ANHUI ANFENG FAN Co Ltd
Current assignee: ANHUI ANFENG FAN Co Ltd
Priority date: 2013-02-20
Filing date: 2013-02-20
Publication date: 2013-07-10
Anticipated expiration: 2023-02-20

Abstract

The utility model aims to provide a fan impeller which has the advantage that tear at a wheel cap inner hole and a wheel disc inner hole and damage caused to a wheel cap inlet ring due to over-large stress can be avoided to improve the safety. The fan impeller comprises blades, a wheel disc, a wheel cap, a wheel cap inlet ring and a shaft disc, and has the key points that a side face of the wheel disc is connected with an annular wheel disc force distribution plate through riveting or plug welding, wherein the wheel cap is connected with the wheel cap inlet ring through a conical wheel cap force distribution ring; and one end of the wheel cap force distribution ring is welded with the wheel cap, and the other end of the wheel cap force distribution ring is welded with the wheel cap inlet ring. According to the fan impeller, by arranging a stress distribution structure which has a simple structure and is convenient to manufacture, the stress born by the wheel disc inner hole, the wheel cap inner hole and the wheel cap inlet ring is reduced, and safe operation of the impeller in case of high-speed rotation is guaranteed.

Description

A kind of draught fan impeller

Technical field

The utility model belongs to fluid machinery class field, specially refers to a kind of draught fan impeller.

Background technique

Centrifugal blower is widely used in industrial production and daily life fields such as aviation, coal, electric power, metallurgy, electronics, automobile, air-conditioning as a kind of turbomachine of carrying air.Impeller is the most important parts of centrifugal blower, and its function is static energy and the kinetic energy that mechanical energy is converted into gas.Draught fan impeller generally is made up of blade, wheel disc, wheel cap, reel, when work, because the influence of centrifugal force, wheel disc, wheel cap are subjected to bigger active force, because the linear velocity of impeller outer diameter is higher than the linear velocity of other position of impeller, therefore the internal stress that causes of rotary centrifugal force is increased gradually by the endoporus place of external diameter to wheel cap and wheel disc, often causes tearing of wheel cap endoporus place and wheel disc endoporus place.Wheel cap is because the restriction of process conditions in addition, its joint does not have big arc transition, the stress that is conducted to the endoporus place by the wheel cap external diameter can not conduct to whole wheel cap import circle equably, the stress that interconnects the place is concentrated, cause stress excessive, make import circle cracking, lead to security incident.

Application number is that 201010543167.4 utility model patent discloses a kind of not uniform thickness blower fan wheel disc, it takes turns the thickness of plate edge less than the wheel disc thickness of remaining part, can be in weight reduction, reduce the rotary inertia of wheel disc, solved the problem that wheel cap and wheel disc are increased gradually by external diameter to the stress at endoporus place to a certain extent, but this kind not difficulty of processing of disc of constant thickness is big, be processed into predetermined curvilinerar figure lathe and peopleware are required height, and with existing not disc of constant thickness same waste material problem is arranged.

The model utility content

The purpose of this utility model is that to propose a kind of stress of can avoiding excessive and cause tearing and draught fan impeller that wheel cap import circle destroys of wheel cap endoporus place and wheel disc endoporus place, to improve Security.

Draught fan impeller of the present utility model comprises blade, wheel disc, wheel cap, wheel cap import circle, reel, and key is that described wheel disc side is connected with the wheel disc component plate of annular by the mode of riveted joint or plug welding; Wheel cap component ring by taper between described wheel cap and the wheel cap import circle is connected, an end of described wheel cap component ring and wheel cap welding, and the other end welds with wheel cap import circle.

Wheel disc endoporus place has added wheel disc component plate, the gravitation that conducts to wheel disc endoporus place by the wheel disc external diameter can be shunted a part to wheel disc component plate like this, make wheel disc component plate bear a part of wheel disk stress, greatly reduce the stress that is transmitted to wheel disc endoporus place, improve the axial rigidity of wheel disc simultaneously, improved safety coefficient.And can shunt a part to wheel cap component ring by the stress that the wheel cap external diameter conducts to the joint of wheel cap and wheel cap import circle, and reduced the stress that wheel cap and wheel cap import circle bear simultaneously, improved the safety coefficient of impeller.

Further, the endoporus of described wheel disc component plate and the welding of the endoporus of wheel disc can be delivered on the wheel disc component plate with the stress that guarantees the wheel disc endoporus, reduce the stress that the wheel disc endoporus bears.

Further, described wheel disc component plate has two, and is individually fixed in the both sides of wheel disc, to guarantee intensity and the stress mean allocation of wheel disc.

Draught fan impeller of the present utility model is shared structure by simple in structure, easily manufactured stress is set, and has reduced the stress that wheel disc endoporus, wheel cap endoporus and wheel cap import circle bear, and has guaranteed the safe operation of impeller under rotating at a high speed.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 draught fan impeller.

Fig. 2 is the structural representation of embodiment 2 draught fan impeller.

Embodiment

Contrast accompanying drawing below, by the description to embodiment, the effect of the mutual alignment between the shape of embodiment of the present utility model such as related each member, structure, the each several part and annexation, each several part and working principle etc. are described in further detail.

Embodiment 1:

As shown in Figure 1, present embodiment is single air inlet draught fan impeller, comprise blade 7, wheel disc 1, wheel cap 2, wheel cap import circle 3, reel 4, the both sides of wheel disc 1 are connected with the wheel disc component plate 5 of two annulars by the mode of plug welding, the endoporus of wheel disc component plate 5 and the welding of the endoporus of wheel disc 1; Wheel cap component ring 6 by taper between described wheel cap 2 and the wheel cap import circle 3 is connected, an end of described wheel cap component ring 6 and wheel cap 2 welding, and the other end welds with wheel cap import circle 3.

Wheel disc endoporus 8 places have added wheel disc component plate 5, the gravitation that conducts to wheel disc endoporus 8 places by wheel disc 1 external diameter can be shunted a part to wheel disc component plate 5 like this, make wheel disc component plate 5 bear a part of wheel disk stress, greatly reduce the stress that is transmitted to wheel disc endoporus 8 places, improve the axial rigidity of wheel disc 1 simultaneously, improved safety coefficient.And can shunt a part to wheel cap component ring 6 by the stress that wheel cap 2 external diameters conduct to the joint of wheel cap 2 and wheel cap import circle 3, and reduced the stress that wheel cap 2 and wheel cap import circle 3 bear simultaneously, improved the safety coefficient of impeller.

Embodiment 2:

As shown in Figure 2, present embodiment is two air inlet draught fan impellers, comprise blade 7, wheel disc 1, wheel cap 2, wheel cap import circle 3, reel 4, the both sides of wheel disc 1 are connected with the wheel disc component plate 5 of two annulars by riveted way, the endoporus of wheel disc component plate 5 and the welding of the endoporus of wheel disc 1; Wheel cap component ring 6 by taper between described wheel cap 2 and the wheel cap import circle 3 is connected, an end of described wheel cap component ring 6 and wheel cap 2 welding, and the other end welds with wheel cap import circle 3.

Claims

1. a draught fan impeller comprises blade, wheel disc, wheel cap, wheel cap import circle, reel, it is characterized in that described wheel disc side is connected with the wheel disc component plate of annular by the mode of riveted joint or plug welding; Wheel cap component ring by taper between described wheel cap and the wheel cap import circle is connected, an end of described wheel cap component ring and wheel cap welding, and the other end welds with wheel cap import circle.

2. draught fan impeller according to claim 1 is characterized in that the endoporus welding of endoporus and the wheel disc of described wheel disc component plate.

3. draught fan impeller according to claim 1 and 2 is characterized in that described wheel disc component plate has two, and is individually fixed in the both sides of wheel disc.