Motor cooling outer fan structure

Abstract

The utility model discloses a motor cooling external fan structure, which comprises a shaft sleeve, a fan blade ring plate and fan blades, the fan blade ring plate is coaxially and fixedly sleeved on the shaft sleeve, and the fan blades are relatively and fixedly arranged on the outer side of the shaft sleeve through the fan blade ring plate, so that the fan blades respectively extend radially and axially from the outer side surface and the shaft side surface which are contacted with the shaft sleeve. The fan blades are in direct contact and fit with the shaft sleeve through the fan blade ring plates, the distance between the fan blades and the shaft sleeve is shortened, and wind friction loss, noise and energy consumption are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor cooling fans, and in particular relates to a motor cooling external fan structure. Background Art

[0002] The existing motor external fan is based on a shaft sleeve, which is connected to the shaft sleeve by a steel plate, and the fan blades are placed between the steel plates. That is, the fan blades are connected to the shaft sleeve through the steel plate. There is a large distance between the fan blades and the steel plate, which results in a small blade width and a large number of blades, and a relatively large overall outer diameter of the fan. During operation, the wind friction loss is large, which causes greater noise and energy consumption. Summary of the invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the utility model provides a motor cooling external fan structure, which allows the fan blades to directly contact and fit with the shaft sleeve through the fan blade ring plate, shortens the distance between the fan blades and the shaft sleeve, and reduces wind friction loss, noise and energy consumption.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model provides a motor cooling external fan structure, including a shaft sleeve, a fan blade ring plate and fan blades. The fan blade ring plate is coaxially fixed to the shaft sleeve, and the fan blades are relatively fixedly installed on the outside of the shaft sleeve through the fan blade ring plate, so that the fan blades extend radially and axially from the outer side surface and the axial side surface in contact with the shaft sleeve respectively.

[0005] Furthermore, the plurality of wind blades are distributed in a circular array along the circular contour of the shaft sleeve.

[0006] Furthermore, a plate width of the fan blade in the axial direction of the shaft sleeve exceeds a length of the shaft sleeve.

[0007] Furthermore, the cross-sectional shape of the fan blade ring plate is L-shaped, and the mounting side of the fan blade is stepped, so that the mounting side of the fan blade fits tightly with the fan blade ring plate and the shaft sleeve.

[0008] Furthermore, a plug-in pre-installation structure is provided at the joint between the fan blade and the fan blade ring plate, and the fan blade is pre-installed on the fan blade ring plate outside the shaft sleeve through the plug-in pre-installation structure.

[0009] Furthermore, the plug-in pre-installation structure is composed of a plug connector located on the fan blade and a plug hole located on the fan blade ring plate, and the fan blade on the fan blade ring plate is pre-installed by inserting the plug connector into the plug hole.

[0010] Furthermore, the structural shape and size of the plug connector are adapted to the shape and size of the plug hole, so that the plug connector can fill up the plug hole when inserted into the plug hole.

[0011] Furthermore, the connection between the fan blade ring plate and the shaft sleeve, and the connection between the fan blade and the fan blade ring plate are both welded.

[0012] Beneficial effects: The utility model makes the fan blades directly contact and fit with the shaft sleeve through the fan blade ring plate. Compared with the motor external fan in the prior art, it eliminates the steel plate structure and saves costs. At the same time, it reduces the distance between the fan blades and the shaft sleeve, reduces the overall outer diameter of the fan, reduces wind friction loss, noise and energy consumption, and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Attached Figure 2 It is a schematic diagram of the half-section structure of the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] As attached Figure 1 and attached Figure 2 As shown, a motor cooling external fan structure includes a sleeve 1, a blade ring plate 2 and blades 3. The blade ring plate 2 is coaxially fixed on the sleeve 1, and the blades 3 are relatively fixedly installed on the outside of the sleeve 1 through the blade ring plate 2, so that the blades 3 extend radially and axially from the outer side surface and the axial side surface in contact with the sleeve 1. The utility model directly contacts and fits the blades 3 with the sleeve 1 through the blade ring plate 2. Compared with the motor external fan in the prior art, the steel plate structure is omitted, the cost is saved, and the distance between the blades and the sleeve is reduced. The overall outer diameter of the fan is reduced, the wind friction loss, noise and energy consumption are reduced, and the efficiency is improved.

[0017] As attached Figure 1 As shown, the plurality of wind blades 3 are distributed in a circular array along the circular contour of the shaft sleeve 1 .

[0018] The plate width of the fan blade 3 in the axial direction of the sleeve 1 exceeds the length of the sleeve 1. The fan blade 3 of the utility model is free from the limitation of the steel plate and the distance from the sleeve 1 is reduced, so the length and width of the fan blade 3 can be expanded, and the overall outer diameter will be relatively small, which is beneficial to reduce noise and reduce losses.

[0019] As attached Figure 2 As shown, the cross-sectional shape of the fan blade ring plate 2 is L-shaped, and the mounting side of the fan blade 3 is stepped, so that the mounting side of the fan blade 3 fits tightly with the fan blade ring plate 2 and the shaft sleeve 1, and the distance between the fan blade 3 and the shaft sleeve 1 is more reasonably optimized.

[0020] The connections between the fan blade ring plate 2 and the shaft sleeve 1, and between the fan blade 3 and the fan blade ring plate 2, are both welded. In order to improve the welding and installation accuracy of the blade 3, the stability of its installation with the fan blade ring plate 2 before welding must be guaranteed. Therefore, in the utility model, a plug-in pre-installation structure is provided at the joint between the fan blade 3 and the fan blade ring plate 2, and the fan blade 3 is pre-installed on the fan blade ring plate 2 outside the shaft sleeve 1 through the plug-in pre-installation structure. More specifically, the plug-in pre-installation structure is composed of a plug connector 4 located on the fan blade 3 and a plug hole 5 located on the fan blade ring plate 2. The fan blade 3 on the fan blade ring plate 2 is pre-installed by inserting the plug connector 4 into the plug hole 5. The pre-installation makes the installation position between the fan blade 3 and the fan blade ring plate 2 accurate, helps stability, facilitates subsequent welding, and improves welding accuracy.

[0021] In order to avoid the formation of grooves or protrusions on the fan ring plate 2 due to the plug-in cooperation between the plug connector 4 and the plug hole 5, which will cause greater wind resistance and wind noise effects, the structural shape and size of the plug connector 4 are adapted to the shape and size of the plug hole 5 so that the plug connector 4 can fill the plug hole 5 when inserted into the plug hole 5.

[0022] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A motor cooling external fan structure, characterized in that: The invention comprises a shaft sleeve (1), a fan blade ring plate (2) and a fan blade (3), wherein the fan blade ring plate (2) is coaxially sleeved and fixed on the shaft sleeve (1), and the fan blade (3) is relatively fixedly mounted on the outer side of the shaft sleeve (1) through the fan blade ring plate (2), so that the fan blade (3) extends radially and axially from the outer side surface and the axial side surface in contact with the shaft sleeve (1).

2. The motor cooling external fan structure according to claim 1, characterized in that: The plurality of fan blades (3) are distributed in a circular array along the circular contour of the shaft sleeve (1).

3. The motor cooling external fan structure according to claim 1, characterized in that: The plate width of the fan blade (3) in the axial direction of the shaft sleeve (1) exceeds the length of the shaft sleeve (1).

4. The motor cooling external fan structure according to claim 1, characterized in that: The cross-sectional shape of the fan blade ring plate (2) is L-shaped, and the mounting side of the fan blade (3) is stepped, so that the mounting side of the fan blade (3) fits tightly with the fan blade ring plate (2) and the shaft sleeve (1).

5. The motor cooling external fan structure according to claim 4, characterized in that: A plug-in pre-installation structure is provided at the joint between the fan blade (3) and the fan blade ring plate (2), and the fan blade (3) is pre-installed on the fan blade ring plate (2) outside the shaft sleeve (1) through the plug-in pre-installation structure.

6. The motor cooling external fan structure according to claim 5, characterized in that: The plug-in pre-installation structure is composed of a plug connector (4) located on the fan blade (3) and a plug hole (5) located on the fan blade ring plate (2), and the fan blade (3) is pre-installed on the fan blade ring plate (2) by inserting the plug connector (4) into the plug hole (5).

7. The motor cooling external fan structure according to claim 6, characterized in that: The structural shape and size of the plug connector (4) are compatible with the shape and size of the plug hole (5), so that the plug connector (4) can fill up the plug hole (5) when it is inserted into the plug hole (5).

8. A motor cooling external fan structure according to any one of claims 1 to 7, characterized in that: The connection between the fan blade ring plate (2) and the shaft sleeve (1), and the connection between the fan blade (3) and the fan blade ring plate (2) are both welded.

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