CN2481886Y

CN2481886Y - Centrifugal fan

Info

Publication number: CN2481886Y
Application number: CN 01242104
Authority: CN
Inventors: 邓国平
Original assignee: HUAWEI FAN Manufacturing Co Ltd SHUNDE CITY
Current assignee: HUAWEI FAN Manufacturing Co Ltd SHUNDE CITY
Priority date: 2001-06-08
Filing date: 2001-06-08
Publication date: 2002-03-13
Anticipated expiration: 2011-06-08

Abstract

The utility model discloses a centrifugal fan, which comprises a snail-shaped crust, a generator fixed on one side of the crust, impellers arranged in the crust and fixed on the rotating shaft of the generator, wherein the impellers comprise a wheel disc and a circle of blades vertically arranged on the disc wheel; and the blades are distributed around the circle rim of the wheel disc at equal intervals, and each blade bulges into an arch in the rotation direction of the impeller. The utility model has the advantages of a simple structure, high pressure of the ejecting gas, compact and nice appearance, light weight, low noise and cheap price.

Description

Centrifugal blower

The utility model discloses a kind of centrifugal blower.

The gas pressure of existing centrifugal blower ejection is lower, and deadweight is bigger, and is very heavy.

The purpose of this utility model is to provide a kind of can spray the big gas of the pressure little lightweight centrifugal blower of volume again.

For achieving the above object, the utility model is by the following technical solutions:

A kind of centrifugal blower, comprise the casing that is volute, be fixed on the motor of casing one side, place in the casing and be installed in impeller on the machine shaft, impeller is by wheel disc and be vertical at one on wheel disc circle blade and constitute, the wheel disc of impeller is connected transmission by key with the rotating shaft of motor, casing is provided with air door and exhaust outlet, on air door, be provided with wind inlet, the corresponding wind inlet in the air sucking mouth of impeller, form the air-out passage between the exhaust outlet of impeller and the casing, the air-out passage is communicated with exhaust outlet, described blade is mutually equidistantly along the wheel disc circle distribution, and each blade all is arc along wheel rotation direction projection.

The another kind of technique scheme improves: the periphery of described blade and wheel disc has an angle α, 75 °≤α≤90 °.Preferred α is 85 °.Angle α is formed by the tangent line of blade and wheel disc.

The another kind of technique scheme improves: a described circle blade is spaced by long and short blade and forms.

The another kind of technique scheme improves: described casing is made up of left shell and right shell, and motor is located on the left shell, and air door is located on the right shell.

The utility model is simple and reasonable, the pressure height of ejection gas, and profile is small and exquisite attractive in appearance, and is in light weight, and noise is low, low price.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is Figure 1A-A sectional view.

Below in conjunction with drawings and Examples the utility model is described in further detail:

As shown in the figure, a kind of centrifugal blower comprises the casing of being made up of left shell 3 and right shell 5 that is volute, is fixed on motor 1 on the left shell, places in the casing and is installed in impeller on the machine shaft 2.Impeller is by wheel disc 6 and be vertical at the circle of one on wheel disc blade 8 and constitute, and the wheel disc of impeller is connected transmission by key 4 with the rotating shaft of motor.Right shell 5 is provided with air door 9, on air door, be provided with wind inlet 10, the corresponding wind inlet 10 in the air sucking mouth of impeller, form air-out passage 7 between the exhaust outlet of impeller and the casing, the air-out passage is communicated with exhaust outlet 11, a described circle blade 8 is spaced by long and short blade and forms, and long and short blade is equidistantly along wheel disc 6 circle distribution, and each blade all is arc along wheel rotation direction projection.Described blade 8 has an angle α to equal 85 ° with the periphery of wheel disc.

Claims

1, a kind of centrifugal blower, comprise the casing that is volute, be fixed on the motor of casing one side, place in the casing and be installed in impeller on the machine shaft, impeller is by wheel disc and be vertical at one on wheel disc circle blade and constitute, the wheel disc of impeller is connected transmission by key with the rotating shaft of motor, casing is provided with air door and exhaust outlet, on air door, be provided with wind inlet, the corresponding wind inlet in the air sucking mouth of impeller, form the air-out passage between the exhaust outlet of impeller and the casing, the air-out passage is communicated with exhaust outlet, it is characterized in that: described blade (8) is mutually equidistantly along wheel disc (6) circle distribution, and each blade all is arc along wheel rotation direction projection.

2, centrifugal blower according to claim 1 is characterized in that: described blade (8) has an angle α, 75 °≤α≤90 ° with the periphery of wheel disc.

3, centrifugal blower according to claim 2 is characterized in that: described angle α equals 85 °.

4, centrifugal blower according to claim 1 and 2 is characterized in that: a described circle blade (8) is spaced by long and short blade and forms.

5, centrifugal blower according to claim 4 is characterized in that: described casing is made up of left shell (3) and right shell (5), and motor (1) is located on the left shell, and air door (9) is located on the right shell.