CN214788076U - High-efficiency energy-saving external rotor axial flow fan - Google Patents

Abstract

The utility model discloses an energy-efficient external rotor axial fan, by the water conservancy diversion panel, the screen panel, external rotor electric machine and axial compressor wind wheel are constituteed, the outer cladding of external rotor electric machine's rotor shell has one deck aluminium lamination, axial compressor wind wheel is by 3~9 aluminium blades, form with external rotor electric machine's the outer aluminium lamination welding of rotor shell, screen panel one end is fixed on the water conservancy diversion panel, other end fixed stay external rotor electric machine, the water conservancy diversion panel includes that the collector describes the entry unit, cylindrical shape water conservancy diversion unit and diffuser form pressure boost unit, axial compressor wind wheel sets up in water conservancy diversion panel cylindrical shape water conservancy diversion unit. The utility model discloses small, the compact structure of axial installation size, electric motor rotor core adopt the alclad scheme, and centrifugal casting's external rotor electric machine is showing and has promoted power factor, has improved the static pressure efficiency of fan, and aluminium blade beading has simplified technology, has reduced the batch production degree of difficulty on the motor external rotor, and light in weight, good performance, with low costs.

Description

High-efficiency energy-saving external rotor axial flow fan

Technical Field

The utility model relates to a fan technical field especially relates to an energy-efficient external rotor axial fan.

Background

The efficiency of the lifting ventilator is mainly realized through two modes: one is to increase the motor power factor; one is to improve the pneumatic performance of the fan. As the motor technology is mature, the difficulty in improving the power factor is high, and the improvement of the process or the change of materials to improve the electrical performance is a common method; the improvement of the aerodynamic performance of the fan can be achieved from multiple aspects, such as improvement of the aerodynamic design of the impeller and the flow channel, reduction of blade tip clearance, reduction of flow loss and the like, but the increase of the diameter of the impeller can obviously improve the aerodynamic efficiency of the impeller, so that the improvement becomes the preferred scheme of mainstream manufacturers.

The large-size axial flow fan on the market mainly adopts injection molding integrated fan blades or iron plate stamping fan blades, the pneumatic performance of the injection molding integrated fan blades is better, but the cost of a die is high, and the high-temperature and low-temperature resistance is poorer; the iron plate fan blade has low cost but has the problem of fatigue fracture caused by resonance.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model designs an energy-efficient external rotor axial fan.

The utility model adopts the following technical scheme:

the utility model provides an energy-efficient external rotor axial fan, by the water conservancy diversion panel, the screen panel, external rotor electric machine and axial flow wind wheel are constituteed, it has the one deck aluminium lamination to wrap outside the rotor shell of external rotor electric machine, axial flow wind wheel is by 3~9 aluminium blades, with the external aluminium lamination welding of rotor shell of external rotor electric machine and constitute, screen panel one end is fixed on the water conservancy diversion panel, the other end fixed support external rotor electric machine, the water conservancy diversion panel includes collector form entry unit, cylindrical shape water conservancy diversion unit and diffuser form pressure boost unit, axial flow wind wheel sets up in water conservancy diversion panel cylindrical shape water conservancy diversion unit.

Preferably, the aluminum blade is formed by stamping or casting an aluminum plate.

Preferably, the welding is argon arc welding, resistance welding or low-temperature flame welding, and the craters are multi-point or multi-section welding or seamless full welding on the whole contact surface.

Preferably, a flange is provided behind the diffuser-like pressurizing unit.

Preferably, the surface of the diffuser-shaped pressurizing unit is expanded in a conical shape, and the conical angle is 6-30 degrees.

The utility model has the advantages that: (1) the utility model has small axial installation size and compact structure, the iron core of the motor rotor adopts an aluminum-coated scheme, the centrifugally cast outer rotor motor obviously improves the power factor and the static pressure efficiency of the fan, the aluminum blades are directly welded on the outer rotor of the motor, the process is simplified, the batch production difficulty is reduced, the weight is light, the performance is good, and the cost is low; (2) when the axial flow fan operates, fluid gradually flows in through the flow-guiding panel and the flow-collecting inlet unit in an accelerated manner, and the flow resistance is small; the axial flow wind wheel in the cylindrical diversion unit of the diversion shell applies work to the inflow fluid, and the efficiency of the fan is obviously improved due to the good pneumatic performance of the axial flow wind wheel; the conical expansion structure of the diffuser-shaped pressurizing unit of the guide shell expands the air flow and further improves the static pressure efficiency of the axial flow fan.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an exploded view of the overall structure of the present invention;

fig. 3 is a half sectional view of the present invention;

fig. 4 is a schematic view of another aspect of the present invention;

fig. 5 is a partial cross-sectional view of the middle deflector panel of the present invention;

in the figure: 1. the wind power generation device comprises a flow guide panel, 2, a mesh enclosure, 3, an outer rotor motor, 4, an axial flow wind wheel, 11, mounting holes, 12, flanges, 13, a flow collector-shaped inlet unit, 14, a cylindrical flow guide unit, 15, a diffuser-shaped pressurizing unit, 21 and a supporting disc.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example (b): as shown in fig. 1, fig. 2, fig. 3 and fig. 4, an energy-efficient external rotor axial flow fan includes a flow guide panel 1, a mesh enclosure 2, an external rotor motor 3, and an axial flow wind wheel 4.

The guide panel 1 is installed on user equipment or a fixed platform through the installation hole 11; the outlet of the diversion panel is provided with a flange 12, the flange 12 is provided with a rivet nut, and the mesh enclosure 2 is connected with the outlet flange 12 of the diversion panel through a fastener.

An axial flow wind wheel 4 is arranged in the flow guide panel 1; the axial flow wind wheel 4 is formed by 3-9 aluminum blades and welded with an outer aluminum layer of a rotor shell of the outer rotor motor 3 after being attached and assembled, and is simple in structure and low in production cost.

The middle part of the mesh enclosure 2 is provided with a supporting disk 21 for supporting the outer rotor motor 3; the support plate 21 bears the rotation torque, axial force and gravity from the outer rotor motor 3, and stably supports the outer rotor motor 3.

As shown in fig. 5, the guide panel includes a collector-shaped inlet unit 13, a cylindrical guide unit 14, and a diffuser-shaped pressurizing unit 15, and the axial flow wind wheel is disposed in the guide panel cylindrical guide unit.

The working principle and the process are as follows:

when the axial flow fan operates, fluid gradually and quickly flows in through the flow-guide panel and the flow-collector-shaped inlet unit, and the flow resistance is small; the axial flow wind wheel in the cylindrical diversion unit of the diversion shell applies work to the inflow fluid, and the efficiency of the fan is obviously improved due to the good pneumatic performance of the axial flow wind wheel; the conical expansion structure of the diffuser-shaped pressurizing unit of the guide shell expands the air flow and further improves the static pressure efficiency of the axial flow fan. The utility model discloses axial installation size is little, compact structure. The motor rotor iron core adopts the aluminum-clad scheme, the aluminum blades are directly welded on the motor outer rotor, the centrifugally cast outer rotor motor obviously improves the power factor, improves the static pressure efficiency of the fan, simplifies the process, reduces the batch production difficulty, and has light weight, good performance and low cost.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims (5)

1. The utility model provides an energy-efficient external rotor axial fan, comprises diversion panel (1), screen panel (2), external rotor electric machine (3) and axial compressor wind wheel (4), characterized by, the outer cladding of rotor shell of external rotor electric machine (3) has the one deck aluminium lamination, and axial compressor wind wheel (4) comprises 3~9 aluminium blades, and the outer aluminium lamination welding of rotor shell of external rotor electric machine (3), and screen panel (2) one end is fixed on diversion panel (1), and other end fixed support external rotor electric machine (3), and diversion panel (1) is including collector form entry unit (13), cylindrical shape diversion unit (14) and diffuser form pressure boost unit (15), and axial compressor wind wheel sets up in diversion panel cylindrical shape diversion unit (14).

2. The efficient energy-saving external rotor axial flow fan as recited in claim 1, wherein the aluminum blades are formed by punching or casting aluminum plates.

3. The axial flow fan with the external rotor and the high efficiency and the energy saving as claimed in claim 1, wherein the welding is argon arc welding, resistance welding or low temperature flame welding, and the craters are multi-point or multi-section welding or seamless full welding on the whole contact surface.

4. The axial flow fan with outer rotor of claim 1 is characterized in that a flanging (12) is arranged behind the diffuser-shaped supercharging unit (15).

5. The axial flow fan with outer rotor as claimed in claim 1, wherein the diffuser-shaped supercharging unit (15) has a conical surface with an angle of 6-30 °.

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