Impeller type fan for box body

Abstract

The utility model provides an impeller type fan for a box body, which is characterized by comprising an impeller, a motor, a flange sealing mechanism and an anti-rotation fixing clamp, the flange sealing mechanism comprises a shaft hole fixing flange and a shaft hole sealing separation blade; the shaft hole fixing flange is mounted on the inner wall of the box; a groove is formed in the surface of the shaft hole fixing flange around the shaft hole, and after the shaft hole fixing flange is fixed to the inner wall of the box, a cavity is formed between the shaft hole fixing flange and the inner wall. The shaft hole sealing blocking piece is arranged in the cavity, a transmission shaft of the motor sequentially penetrates through the shaft hole sealing blocking piece, the shaft hole fixing flange and the anti-rotation fixing clamp, and then the end of the transmission shaft is fixed through a nut, so that the impeller type draught fan for the box can achieve precise connection between the shaft hole part and the box and prevent moisture from overflowing.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to an impeller fan for a box body. Background Art

[0002] Constant temperature and humidity chambers are used for testing, monitoring and preservation of products in specific environments and are widely used in the market. Whether it is used for preservation or testing, in order to achieve a balanced temperature throughout the interior, a fan needs to be installed to circulate the air inside the chamber, so that the air heated by the heating device can be transported to all parts of the chamber, achieving the effect of balanced temperature inside.

[0003] However, the traditional fan has a poor sealing structure. After installation, it is easy to cause temperature loss in the box, especially the axial part of the fan. Poor sealing causes moisture in the constant temperature and humidity box to overflow, affecting the life of the motor. Utility Model Content

[0004] The utility model aims to provide an impeller fan for a box body, the shaft hole part of which can be precisely connected with the box body to prevent moisture from overflowing.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an impeller fan for a box body, comprising an impeller, a motor, a flange sealing mechanism and an anti-rotation fixing card;

[0006] The flange sealing mechanism includes an axial hole fixing flange and an axial hole sealing baffle; the axial hole fixing flange is installed on the inner wall of the box; the surface of the axial hole fixing flange is provided with a groove around the axial hole, and after being fixed to the inner wall of the box, a cavity is formed between the axial hole fixing flange and the inner wall; the axial hole sealing baffle is placed in the cavity, and the drive shaft of the motor passes through the axial hole sealing baffle, the axial hole fixing flange and the anti-rotation fixing clamp in sequence, and the end is fixed by a nut.

[0007] Furthermore, the shaft hole sealing baffle is interference fit with the transmission shaft.

[0008] Furthermore, the impeller includes a wheel disc and a plurality of blades;

[0009] A plurality of fan blades are fixed on the wheel at equal circumferential intervals; the outer corners of the fan blades close to the axis of the wheel are chamfered to form inclined surfaces.

[0010] Furthermore, the transmission shaft is provided with a milling surface, and the end of the transmission shaft is provided with a thread;

[0011] The anti-rotation fixing card is inserted into the shaft hole of the wheel disc and has an interference fit with the shaft hole; after the end of the transmission shaft passes through the anti-rotation fixing card, the anti-rotation fixing card is fixed between the milling surface and the nut through a nut.

[0012] Furthermore, a rubber pad is provided between the nut and the anti-rotation fixing card.

[0013] Furthermore, the motor is provided with a plurality of fixing legs.

[0014] Compared with the prior art, the advantages of the utility model are: the fan of the utility model realizes the sealing of the shaft hole by setting a flange sealing mechanism and a box body, and the shaft hole sealing baffle is placed between the shaft hole fixing flange and the inner wall of the box body, and the shaft hole sealing baffle and the drive shaft realize interference fit, so that it is difficult for moisture to overflow between the shaft hole sealing baffle and the drive shaft. At the same time, since the shaft hole sealing baffle is set in the cavity, under the premise of ensuring the installation accuracy of the shaft hole sealing baffle and the flange, it is difficult for moisture to flow out of the cavity, thereby fully ensuring the sealing effect of the fan and the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the fan in the embodiment of the utility model;

[0016] Figure 2 This is a front view of the impeller in the embodiment of the utility model;

[0017] Figure 3 It is a side cross-sectional view of the impeller in the embodiment of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be further described below.

[0019] like Figure 1 As shown, the utility model provides an impeller fan for a box body, comprising an impeller 1, a motor 2, a flange sealing mechanism and an anti-rotation fixing card 5;

[0020] The flange sealing mechanism includes an axial hole fixing flange 3 and an axial hole sealing baffle 4; the axial hole fixing flange 3 is installed on the inner wall of the box body; the surface of the axial hole fixing flange 3 is provided with a groove around the axial hole, and after being fixed to the inner wall of the box body, a cavity is formed between the axial hole fixing flange 3 and the inner wall; the axial hole sealing baffle 4 is placed in the cavity, and the axial hole sealing baffle 4 and the transmission shaft have an interference fit, so that it is difficult for moisture to overflow between the axial hole sealing baffle 4 and the transmission shaft. At the same time, since the axial hole sealing baffle 4 is arranged in the cavity, under the premise of ensuring the installation accuracy of the axial hole sealing baffle 4 and the flange, it is difficult for moisture to flow out of the cavity, thereby fully ensuring the sealing effect of the fan and the box body. Due to the interference fit between the axial hole sealing baffle 4 and the transmission shaft, the transmission shaft rotates, and the axial hole sealing baffle 4 rotates in the cavity.

[0021] After the transmission shaft of the motor 2 passes through the shaft hole sealing baffle 4, the shaft hole fixing flange 3 and the anti-rotation fixing card 5 in sequence, the end is fixed by the nut 6. The transmission shaft is provided with a milling surface, and the end of the transmission shaft is provided with a thread; the anti-rotation fixing card 5 is inserted into the shaft hole of the wheel disc 11, and has an interference fit with the shaft hole. The anti-rotation fixing card 5 and then the wheel disc 11 can avoid sliding due to the interference fit; after the end of the transmission shaft passes through the anti-rotation fixing card 5, the anti-rotation fixing card 5 is fixed between the milling surface and the nut 6 by the nut 6. After fixing, the rotation of the transmission shaft drives the anti-rotation fixing card 5 and the impeller 1 to rotate together. A rubber pad is provided between the nut 6 and the anti-rotation fixing card 5 to further achieve the sealing effect of the shaft hole and prevent moisture in the box from overflowing.

[0022] like Figure 2 As shown, the impeller 1 includes a wheel disc 11 and a plurality of blades 12; the plurality of blades 12 are fixed on the wheel disc 11 at equal intervals in the circumferential direction; Figure 3 As shown, the outer corner of the fan blade 12 close to the axis of the wheel disc 11 is chamfered to form an inclined surface; the chamfering treatment here makes the wind pressure at the return air point in the center of the fan blade 12 lower and the air volume around it larger, so that the inside of the box obtains a larger air volume and ensures sufficient internal air circulation.

[0023] In this embodiment, a plurality of fixing legs 7 are provided on the motor 2 for fixing the motor 2 .

[0024] The above are only preferred embodiments of the present invention and do not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, may make any equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which shall be deemed as the content of the technical solution of the present invention and still fall within the protection scope of the present invention.

Claims

1. An impeller fan for a box, characterized in that: It includes an impeller, a motor, a flange sealing mechanism and an anti-rotation fixing card; The flange sealing mechanism includes an axial hole fixing flange and an axial hole sealing baffle; the axial hole fixing flange is installed on the inner wall of the box; the surface of the axial hole fixing flange is provided with a groove around the axial hole, and after being fixed to the inner wall of the box, a cavity is formed between the axial hole fixing flange and the inner wall; the axial hole sealing baffle is placed in the cavity, and the transmission shaft of the motor passes through the axial hole sealing baffle, the axial hole fixing flange and the anti-rotation fixing card in sequence, and the end is fixed by a nut.

2. The impeller fan for a box according to claim 1, characterized in that: The shaft hole sealing baffle is interference fit with the transmission shaft.

3. The impeller fan for a box according to claim 1, characterized in that: The impeller comprises a wheel disc and a plurality of fan blades; A plurality of the fan blades are fixed on the wheel disc at equal intervals in the circumferential direction; the outer corners of the fan blades close to the axis of the wheel disc are chamfered to form inclined surfaces.

4. The impeller fan for a box according to claim 3, characterized in that: The transmission shaft is provided with a milling surface, and the end of the transmission shaft is provided with a thread; The anti-rotation fixing card is inserted into the shaft hole of the wheel disc and has an interference fit with the shaft hole; after the end of the transmission shaft passes through the anti-rotation fixing card, the anti-rotation fixing card is fixed between the milling surface and the nut through a nut.

5. The impeller fan for a box according to claim 4, characterized in that: A rubber pad is provided between the nut and the anti-rotation fixing card.

6. The impeller fan for a box according to claim 1, characterized in that: The motor is provided with a plurality of fixing legs.

Images