CN2308756Y

CN2308756Y - Low noise fan impeller

Info

Publication number: CN2308756Y
Application number: CN 97229780
Authority: CN
Inventors: 施坤炎
Original assignee: YUYAO FAN FACTORY
Current assignee: YUYAO FAN FACTORY
Priority date: 1997-10-24
Filing date: 1997-10-24
Publication date: 1999-02-24
Anticipated expiration: 2007-10-24

Abstract

The utility model discloses an edge biting type fan impeller with low noise. A grid-shaped cylinder structure is composed of two front disks, a central disk and a plurality of blades, wherein the blades and the two front disks are in edge biting type connection that flangings on the blades are wrapped by the front disks, and the blades and the central disk are in insertion connection through the rehabilitation of the central disk. The connection modes have the advantages that the connection is firm and can not loosen easily, and the geometric accuracy, the balance performance and the torsional rigidity of the impeller is increased; the connection is beneficial to increase the aerodynamic performance of a fan, and thus the noise and the vibration of the whole machine are reduced; simultaneously, the utility model can use thinner materials to reduce the cost, and the connection is beneficial to increase the market competition ability of new products.

Description

Undercut formula silent ventilator impeller

The utility model relates to the wheel member in the low-noise centrifugal formula blower fan.

The low-noise centrifugal formula blower fan of being made up of impeller is widely used in occasions such as air-conditioning, refrigeration and ventilation.Wheel member is the critical component in the low-noise centrifugal formula blower fan, and the integral rigidity of impeller, geometric accuracy and balance quality will influence the aerodynamic quality of complete blower, is the principal element that reduces noise and vibration.Wheel member of the prior art has, and band that the employing piece insertion type connects, whole is expected stamping-out blade and integral molded plastic impeller, the blade that piece insertion type connects is loosening easily, influences geometric accuracy and balance quality, so integral rigidity is low, torsional rigidity is poor, easily causes fan noise and vibration; And the defective of whole blanking type and integral molded plastic impeller is the impeller weight, influences the aerodynamic quality of blower fan, and equipment operation reliability and working life are reduced.

The purpose of this utility model is intended to overcome the defective of prior art and provides a kind of and be connected firmly, helps reducing the undercut formula silent ventilator impeller of fan noise and vibration, raising aerodynamic quality.

The utility model is realized by following technical proposal: comprise two shrouds and a mid-game, mid-game can connect motor, the multi-disc vanes fixed forms grid-like cylindrical structure at the periphery of two shrouds and a mid-game, it is characterized in that described blade two has flanging, form the undercut formula by two shroud envelopes and connect, blade is connected with mid-game is chimeric by the flange recovery of mid-game simultaneously.

The utility model is owing to the linkage structure that has changed blade and shroud, mid-game, be difficult for loosening so be connected firmly, geometric accuracy, balance quality and the torsional rigidity of impeller have been improved, help improving the aerodynamic quality of blower fan, thereby total noise of centrifuge and vibration have been reduced, can adopt simultaneously thin material again, reduce production costs significantly, the market competitiveness of new product is improved.

Description of drawings.

Fig. 1 is a kind of structural representation of the utility model (motor is an external rotor type)

Fig. 2 is the left side view of Fig. 1.

Fig. 3 is the A place enlarged view of Fig. 1.

Fig. 4 is the B place enlarged view of Fig. 2.

Fig. 5 is the C-C sectional view of Fig. 4.

Fig. 6 is the another kind of structural representation (motor is an internal rotor type) of the utility model.

Undercut formula silent ventilator impeller (referring to Fig. 1-6) comprises two shrouds (1) and a mid-game (3), and the periphery that the blade of multi-disc arc (2) is fixed on two shrouds and mid-game forms grid-like cylindrical structure.

Blade (2) with being connected of two shrouds (1) is: two of blade has flanging (4), and this flanging forms the undercut formula by two shroud envelopes and connects, and realizes by edge knurling process on special-purpose floding machine.

Blade (2) is chimeric connection with being connected of mid-game (3), the groove that processing and blade radian match in the mid-game, bottom land has withdrawing auxiliary hole (5), and blade has been lifted up two side flangings (6) of mid-game groove earlier before embedding in the mid-game groove, after treating that blade embeds, flange restores to be clamped blade is tightly chimeric.

The mid-game of Fig. 1 directly is connected on the motor, and this motor is an external rotor type.

Also be fixed with axle sleeve (7) in the mid-game central shaft hole of Fig. 6, this axle sleeve connects motor shaft, uses for being equipped with inner rotor type motor.

Claims

1, a kind of undercut formula silent ventilator impeller, comprise two shrouds (1) and a mid-game (3), mid-game can connect motor, the periphery that multi-disc blade (2) is fixed on two shrouds and a mid-game forms grid-like cylindrical structure, it is characterized in that described blade (2) two has flanging (4), form the undercut formula by two shroud envelopes and connect, blade is connected with mid-game is chimeric by flange (6) recovery of mid-game simultaneously.

2, undercut formula silent ventilator impeller as claimed in claim 1 is characterized in that also being fixed with axle sleeve (7) in described mid-game (3) central shaft hole.