Explosion-proof reversely-installed stator fan

Abstract

The utility model discloses an explosion-proof type reversely-installed stator fan which comprises a fan frame, fan blades, a stator and a PCB, the fan blades are connected with a shaft core, a wrapping shell is integrally formed in the fan frame, the wrapping shell is of a structure with the front end closed and the rear end open, a middle pipe hole is formed in the center of the wrapping shell, and the inner space of the wrapping shell is isolated from the middle pipe hole; the stator and the PCB are arranged in the coating shell from the opening at the rear end, and a rear cover is arranged at the opening at the rear end of the coating shell to seal and cover the PCB and the stator in the coating shell; the shaft core penetrates into the middle pipe hole from the front end and is fixedly installed through a bearing to form a rotatable structure. Therefore, the stator and the PCB can be completely sealed, the strength of the stator mounting structure is remarkably improved, and good waterproof, dustproof and explosion-proof effects are achieved. Meanwhile, after the structure is adopted, the PCB does not need to be sealed through pouring sealant, the manufacturing process of the fan is simplified, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan technical field especially, it is mainly applied to new energy industry, industrial control, server, game machine equipment, air conditioning cabinet, intelligent household electrical appliances, computer case etc. BACKGROUND

[0002] Fan has application in many products, such as power supply, industrial control, server, industrial equipment, charging pile, computer case, household appliance etc., and its function is mainly used for heat dissipation. Fan generally includes fan frame, fan blade, stator, PCB board etc., and the existing fan is generally provided with base at the bottom of fan frame, the base is the groove structure of opening towards front, is provided with middle tube in the center, and PCB board and stator are installed along middle tube, such as the heat dissipation fan with glue filling waterproof structure disclosed in Chinese utility model patent CN202121710693.5. Since fan blade needs to be installed, the depth of base cannot be too large, otherwise it will cause interference to fan blade. PCB board is embedded in base, and stator is located above base, and base cannot cover stator, and even PCB board is directly exposed. In order to prevent water and dust, the current method is mainly to fill sealant in base to seal PCB board, and the process is relatively complex, the cost is relatively high, and PCB board cannot be completely repaired. At the same time, stator is only covered by fan blade, but it is not a closed structure, so that its installation structure is relatively fragile and is easy to be damaged and easy to enter dust and water. CONTENT

[0003] The utility model discloses in view of the shortcomings of prior art, provide a structure design is more reasonable, the sealing of stator and PCB board is better, internal structure is not easy to be damaged, the making process is simpler anti -explosion formula reverse installation stator fan.

[0004] To solve the above technical problems, the utility model discloses the following technical scheme: an anti -explosion formula reverse installation stator fan, including fan frame, fan blade, stator and PCB board, the shaft core is connected to the fan blade, and its characterized in that: the cladding shell is integrally formed in the fan frame, and the cladding shell is the structure of front end closed and rear end opening, and the middle tube hole is formed in the center of the cladding shell, and the internal space of the cladding shell is isolated from the middle tube hole; the stator and the PCB board are installed into the cladding shell from the rear end opening, and a rear cover is installed at the rear end opening of the cladding shell to cover the PCB board and the stator in the cladding shell; the shaft core is inserted into the middle tube hole from the front end and is fixed by bearing to form a rotatable structure.

[0005] As preferred, the cladding shell is the " convex " character structure of front part diameter less than rear part diameter, the stator is installed in the inside of the front part area of the cladding shell, and the fan blade covers the outside of the front part area of the cladding shell, so that the magnetic stripe of the inner wall of the fan blade is opposite to the inside and outside of the stator, and the magnetic stripe is installed on the inner wall of the fan blade through the iron shell.

[0006] Further, two bearings are arranged in the middle tube hole, the front bearing is installed at a position close to the front end of the shaft core in cooperation with a gasket, and the rear bearing is installed at a position close to the tail end of the shaft core in cooperation with a gasket.

[0007] Further, a step protruding inward is arranged on the hole wall of the middle tube hole, and the rear end surface of the front bearing abuts against the front end surface of the step.

[0008] Further, a spring is arranged in the middle tube hole, the front end of the spring abuts against the rear end surface of the step, and the tail end of the spring abuts against the front end surface of the rear bearing.

[0009] Further, the PCB board is arranged inside the rear region of the cladding shell, and the PCB board is fixed by the rear cover.

[0010] As preferred, the rear cover is formed by injection molding at the rear end opening of the cladding shell to form a sealing structure.

[0011] The utility model discloses a closed cladding shell is formed on the front surface of the fan frame, the cladding shell opens towards the rear, the stator and the PCB board are all arranged in the cladding shell from the rear, and the opening of the cladding shell is covered by using the rear cover, so that the stator and the PCB board are completely closed, the strength of the stator mounting structure is improved, and good waterproof, dustproof and explosion-proof effects are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole section schematic diagram of the utility model;

[0013] Figure 2 It is the section schematic diagram of the fan frame of the utility model.

[0014] In the drawing, 1 is the fan frame, 11 is the cladding shell, 12 is the middle tube hole, 13 is the step, 2 is the fan blade, 21 is the shaft core, 22 is the iron shell, 23 is the magnetic strip, 31 is the front bearing, 32 is the rear bearing, 4 is the stator, 5 is the rear cover, 6 is the PCB board, 7 is the spring, and 8 is the gasket. DETAILED DESCRIPTION

[0015] In the embodiment, refer to Figure 1 and Figure 2The explosion-proof reverse mounting stator fan comprises a fan frame 1, fan blades 2, a stator 4 and a PCB 6, the fan blades 2 are connected with a shaft core 21, a cladding shell 11 is integrally formed in the fan frame 1, the cladding shell 11 is of a structure with a closed front end and an open rear end, a central pipe hole 12 is formed in the center of the cladding shell 11, the internal space of the cladding shell 11 is isolated from the central pipe hole 12, the stator 4 and the PCB 6 are loaded into the cladding shell 11 from the open rear end, a rear cover 5 is installed at the open rear end of the cladding shell 11 to cover the PCB 6 and the stator 4 in the cladding shell 11, so that the structural strength is improved and the explosion-proof function is achieved, and the shaft core 21 is penetrated into the central pipe hole 12 from the front end and is fixed by bearings to form a rotatable structure.

[0016] The cladding shell 11 is of a "convex" structure with a smaller diameter at the front end than at the rear end, the stator 4 is loaded into the front end region of the cladding shell 11, and the fan blades 2 cover the outer part of the front end region of the cladding shell 11, so that the magnetic strips 23 on the inner wall of the fan blades 2 are opposite to the inner and outer parts of the stator 4, and the magnetic strips 23 are installed on the inner wall of the fan blades 2 by the iron shell 22.

[0017] Front and rear bearings are arranged in the central pipe hole 12, the front bearing 31 is installed at a position close to the front end of the shaft core 21 by cooperating with a gasket and is mainly used for bearing the gravity of the fan blades 2, and the rear bearing 32 is installed at a position close to the tail end of the shaft core 21 by cooperating with a gasket 8 and is mainly used for bearing the rear thrust generated when the fan blades 2 rotate.

[0018] A step 13 protruding inward is arranged on the hole wall of the central pipe hole 12, and the rear end surface of the front bearing 31 abuts against the front end surface of the step 13.

[0019] A spring 7 is arranged in the central pipe hole 12, the front end of the spring 7 abuts against the rear end surface of the step 13, and the tail end of the spring 7 abuts against the front end surface of the rear bearing 32, so as to assist in absorbing the rear thrust when the fan blades 2 rotate at high speed and improve the service life of the rear bearing 32.

[0020] The PCB 6 is installed in the rear end region of the cladding shell 11 and is fixed tightly by the rear cover 5.

[0021] The rear cover 5 is formed by injection molding at the open rear end of the cladding shell 11 to form a sealed structure, so that no potting glue is needed, the process is simpler, and the cost is lower.

[0022] The utility model has been described in detail above, the above description is only a preferred embodiment of the utility model, and cannot limit the utility model implementation range, that is, any equivalent change and modification made according to the application range should still belong to the utility model coverage.

Claims

1. An explosion-proof reverse-mounted stator fan, comprising a fan frame, fan blades, a stator and a PCB board, the fan blades being connected with a shaft core, characterized in that: The fan frame is integrally formed with a cladding shell, the cladding shell is of a structure with a closed front end and an open rear end, a central tube hole is formed in the cladding shell, and the internal space of the cladding shell is isolated from the central tube hole; the stator and the PCB board are loaded into the cladding shell from the open rear end, a rear cover is installed at the open rear end of the cladding shell to cover the PCB board and the stator in the cladding shell; the shaft core is inserted into the central tube hole from the front end and is fixed by bearings to form a rotatable structure.

2. The explosion-proof reverse- mounted fan of claim 1, wherein: The cladding shell is of a "convex” structure with a smaller diameter at the front end than at the rear end, the stator is loaded inside the front end region of the cladding shell, and the fan blade covers the outside of the front end region of the cladding shell so that the magnetic strips on the inner wall of the fan blade are opposite to the inside and outside of the stator, and the magnetic strips are installed on the inner wall of the fan blade by the iron shell.

3. The explosion-proof reverse- mounted fan of claim 1, wherein: Two bearings are arranged in the central tube hole, the front bearing is installed at a position close to the front end of the shaft core in cooperation with a gasket, and the rear bearing is installed at a position close to the tail end of the shaft core in cooperation with a gasket.

4. The explosion-proof reverse- mounted fan of claim 3, wherein: A step protruding inward is arranged on the hole wall of the central tube hole, and the rear end surface of the front bearing abuts against the front end surface of the step.

5. The explosion-proof reverse- mounted fan of claim 4, wherein: A spring is arranged in the central tube hole, the front end of the spring abuts against the rear end surface of the step, and the tail end of the spring abuts against the front end surface of the rear bearing.

6. The explosion-proof reverse- mounted fan of claim 1, wherein: The PCB board is loaded inside the rear end region of the cladding shell and is tightly fixed by the rear cover.

7. The explosion-proof reverse- mounted fan of claim 1 or 6, wherein: The rear cover is formed by injection molding at the open rear end of the cladding shell to form a sealed structure.

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