CN211820010U

CN211820010U - Double-air-inlet centrifugal fan

Info

Publication number: CN211820010U
Application number: CN202020303384.5U
Authority: CN
Inventors: 常宇飞; 徐建; 顾政
Original assignee: Jiangsu Josun Technology Co ltd
Current assignee: Jiangsu Josun Technology Co ltd
Priority date: 2020-03-12
Filing date: 2020-03-12
Publication date: 2020-10-30
Anticipated expiration: 2030-03-12

Abstract

The utility model relates to a two air inlet centrifugal fan, including spiral case, motor and impeller, the symmetry is equipped with circular air intake on the both sides face of spiral case, the motor is installed in the spiral case, installs the impeller in the motor shaft, its characterized in that, install the motor support on the ventilation hole of spiral case one side, fixed mounting has flange on the casing of motor, and the motor passes through flange and installs in the motor support. The service life is long, the reliability is good, and the motor is directly driven.

Description

Double-air-inlet centrifugal fan

Technical Field

The utility model relates to a wind power generation field, concretely relates to two air inlet centrifugal fan of wind power generation machine for both sides air inlet.

Background

With the rapid development of technical strength in the wind power industry, the double-fed asynchronous wind driven generator is more and more mature in technology and higher in application popularity rate, meanwhile, the engine room is more and more compact in design, and an air-air cooler of the generator is used as a cooling mode of a traditional generator and is cooled by an outer rotor fan generally. The outer rotor fan is high in manufacturing cost and high in damage rate, and the power loss of a mode of driving the fan shaft by a belt is large and the mechanical abrasion is serious.

Disclosure of Invention

In order to solve the problems of high cost and high damage rate of the wind driven generator, the utility model develops the double-air inlet centrifugal fan which has long service life, good reliability and direct drive of the motor,

in order to achieve the above purpose, the utility model adopts the technical proposal that:

the utility model provides a two air inlet centrifugal fan, includes spiral case, motor and impeller, the symmetry is equipped with circular air intake on the both sides face of spiral case, the motor is installed in the spiral case, installs the impeller in the motor shaft, install the motor support on the ventilation hole of spiral case one side, fixed mounting has flange on the casing of motor, and the motor passes through flange and installs in the motor support.

Further, the connecting flange is mounted in the middle of the motor shell.

Furthermore, the motor passes through the vent hole on one side of the volute, and the rotating shaft of the motor is coaxial with the two vent holes.

Furthermore, the flange is sleeved on the shell of the motor, and the flange and the shell of the motor are fixedly connected through a circle of angle iron.

And furthermore, the impellers are two groups of back-to-back impellers, and the tangential direction of each impeller is the same as the rotation direction of the motor.

After taking above technical scheme, the beneficial effects of the utility model are that:

1. the air volume is large: the centrifugal fan adopts two groups of back-to-back impellers, air enters from two sides, the air suction area is large, and the air quantity is increased.

2. The noise is low: the impeller blade adopts forward mounting means, and the blade tangent line is facing the direction of rotation of motor promptly, and this kind of structure lets the noise of fan operation very reduce.

3. The operation and maintenance cost is low: the mode of motor direct mount has reduced the spare part quantity of fan, has reduced the requirement to rotating member dynamic balance, has reduced the operation maintenance cost.

This technical scheme can effectively improve the life and the reliability of fan.

Drawings

Fig. 1 is a front view of the present invention;

fig. 2 is a right side view of the present invention;

fig. 3 is a schematic structural view of the motor.

In the figure: the device comprises a shell 1, a protective net 2, an impeller 3, an air inlet 4, a motor support 5, a motor 6, a flange 7 and a connecting piece 8.

Detailed Description

The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings:

as shown in the figure, the double-air-inlet centrifugal fan comprises a volute-shaped shell 1, wherein an air outlet is formed in the top of the shell 1, and can be a circular tubular air outlet or a square tubular air outlet. The flange is arranged at the air outlet, so that the wind power generation motor can be conveniently connected. Circular air inlets 4 are symmetrically formed in planes on two sides of the shell 1, and a protective net 2 is mounted on the air inlets to prevent large sundries from entering the interior of the fan. A motor support 5 is installed on the outer side of the air inlet 4 on one side, a flange 7 is sleeved in the middle of the motor 6, and the flange 7 is fixed on the motor through a plurality of L-shaped connecting pieces 8 and can be fixed in a welding or threaded connection mode. And 7, connecting and fixing the motor bracket 5. Generally, a plurality of bolts are adopted for fixing, so that the disassembly is convenient. The motor 6 is positioned in the center of the air inlet 4, and the motor 6 can be cooled during air inlet. A pair of impellers 3 are installed on a rotating shaft of the motor 6, the impellers 3 are installed back to back, and the impellers 3 are installed in the forward direction, namely the tangential direction of blades of the impellers 3 is consistent with the rotating direction of the motor, so that the noise can be reduced. Because the motor 6 directly drives the impeller 3, transmission structures such as an outer rotor, a belt, a coupling and the like are not needed, and the reliability is improved. Air is sucked from the axial direction by the impeller 3 rotating at high speed through the air inlet 4, kinetic energy is converted into potential energy, higher pressure is generated, and meanwhile, air flow is discharged from the axial direction to the radial direction.

Claims

1. The utility model provides a two air inlet centrifugal fan, includes spiral case, motor and impeller, the symmetry is equipped with circular air intake on the both sides face of spiral case, the motor is installed in the spiral case, installs the impeller in the motor shaft, its characterized in that, install the motor support on the ventilation hole of spiral case one side, fixed mounting has flange on the casing of motor, and the motor passes through flange and installs in the motor support.

2. A centrifugal fan as claimed in claim 1, wherein the connecting flange is mounted to a middle portion of the motor housing.

3. The centrifugal fan as claimed in claim 1, wherein the motor passes through a vent hole on one side of the volute, and a rotation shaft of the motor is coaxial with the two vent holes.

4. The centrifugal fan as claimed in claim 1, wherein the flange is sleeved on the motor housing, and the flange and the motor housing are connected and fixed by a ring of angle iron.

5. A centrifugal fan with double inlet air as claimed in claim 1, wherein the impellers are two groups of back-to-back impellers, and the tangential direction of each impeller is the same as the rotation direction of the motor.