Electric-corrosion-resistant fan for bearing

Abstract

The fan comprises a fan frame, a metal tube, a stator, a PCB and an integrated rotating shaft fan blade structure, an installation part is arranged in the fan frame, the inner side of the installation part is connected with an insulation part, the metal tube is arranged in the installation part, the metal tube is provided with a passing area, the outer wall of the insulation part is arranged on the inner side of the metal tube and attached to the inner wall of the metal tube, and the inner wall of the metal tube is connected with the stator. The insulation part comprises a first part, the first part penetrates through the passing area to be connected with the installation part, the stator is arranged on the installation part in a sleeving mode, the PCB is arranged on the fan frame and connected with the stator, and the integrated rotating shaft fan blade structure is arranged in the fan frame and rotationally connected into the insulation part. The device has the advantages of being low in cost, convenient to assemble, capable of effectively reducing the electric corrosion risk and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan technical field, concretely relates to a bearing electric corrosion resistance fan. BACKGROUND

[0002] The application of heat dissipation fan in daily life has been very extensive, and a large number of heat dissipation fans are needed in new energy industry, and the heat dissipation fan in new energy industry has the characteristics of high power and high speed, and bearing electric corrosion occurs occasionally. With the increasing power of charging piles, in order to meet the heat dissipation demand of charging piles, the speed of heat dissipation fan is also higher and higher. The increase of the frequency of internal magnetic field switching of fan leads to the increase of shaft voltage; in addition, the increase of speed makes the lubricating grease between the ball and the raceway thin, and the insulation voltage resistance of the lubricating grease is poor. The superposition of the two factors leads to the generation of shaft current in the loop more easily, and the problem of bearing electric corrosion is more serious. Through research, bearing electric corrosion is mainly caused by shaft current, and shaft current comes from shaft voltage. The generation mechanism of shaft voltage, shaft current and bearing electric corrosion is as follows: 1. shaft voltage: when the motor is running, the imbalance of stator magnetic field will produce alternating electromagnetic field, and the alternating electromagnetic field will induce AC voltage difference between metal pipe or metal shaft core and bearing. On the other hand, during the operation of the motor, the static charge on the rotor assembly will be generated by the friction between the rotor assembly and the air, and the gradual accumulation of static charge will cause the DC voltage difference between the shaft core and the bearing. These two voltage differences are called shaft voltage; 2. shaft current: metal shaft core, bearing inner ring, ball and lubricating grease, bearing outer ring, metal pipe, which constitute a potential current loop. When the shaft voltage exceeds the insulation voltage resistance of the lubricating grease, it will break through the lubricating grease and produce capacitive breakdown discharge, forming a current loop to generate shaft current. Shaft current will cause surface fatigue damage of the ball and the raceway and gradual aging of the lubricating grease; 3. bearing electric corrosion: when the shaft current is large, spark discharge will occur, which will cause the melting corrosion of the point contact area between the ball and the raceway (inner ring or outer ring), which is the electric corrosion phenomenon of the bearing. In addition, spark discharge will also cause the accelerated deterioration of lubricating grease, leading to the premature failure of the bearing; 4. harm of bearing electric corrosion: bearing electric corrosion will cause abnormal vibration of the bearing, deterioration of the lubricating grease, and early failure of the bearing, which will further cause the increase of vibration and noise of the fan. In severe cases, the bearing will be burned out, causing the fan to be stuck and losing the heat dissipation capacity.

[0003] As patent application No. 202323356347.3 discloses an anti-falling anti-bearing electric corrosion fan, which comprises an outer frame, a middle pipe and a shaft core, the middle pipe and the shaft core are metal parts, the surfaces of the shaft core and the middle pipe are provided with aluminum layers, the surfaces of the aluminum layers are formed with ceramic layers, the middle pipe is provided with an insulating ring, and two bearing chambers for installing bearings are formed in the middle pipe corresponding to the positions of the two ends of the insulating ring. The anti-falling anti-bearing electric corrosion fan forms a ceramic layer on the surface of the aluminum layer to resist electric corrosion, which is not easy to process and has high cost. UTILITY MODEL CONTENT

[0004] The utility model discloses to solve the deficiency in the prior art, provide a low cost, convenient to process and assemble bearing electric corrosion resistance fan.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] Bearing electric corrosion resistance fan, including:

[0007] Fan frame, be equipped with the installation part in the fan frame, and the inside of installation part is connected with the insulating part;

[0008] Metal pipe, set up in the installation part, and the metal pipe is equipped with the through area, and the outer wall of insulating part sets up in the inside of metal pipe and the inner wall of metal pipe is pasted, and the insulating part includes the first part, and the first part passes through the through area and is connected with the installation part;

[0009] Stator, set up on the installation part;

[0010] PCB board, set up on the fan frame and be connected with the stator;

[0011] And integral type rotating shaft blade structure, set up in the fan frame and rotate and connect in the insulating part.

[0012] Optimal, the integral type rotating shaft blade structure includes the blade part, the shell part and the axle core, and the shell part sets up in the blade part, and is equipped with a plurality of blades on the blade part, and one end of the axle core passes through the blade part and is connected with the shell part, and the other end of the axle core enters the insulating part, and the blade part sets up in the fan frame and is set up on the stator.

[0013] Optimal, the axle core is rotated and connected in the insulating part through the first bearing and the second bearing, and the first bearing and the second bearing are arranged on the axle core in the upper and lower interval, and the outer wall of the first bearing and the second bearing all are in contact with the insulating part.

[0014] Optimal, the metal pipe is copper pipe, and the spring is arranged between the first bearing and the blade part, and the spring is set up on the axle core, and one end of the axle core away from the shell part is equipped with the clamping groove, and the clamping spring is arranged in the clamping groove, and the clamping spring is located in the lower side of the second bearing.

[0015] Optimal, still include the rubber magnet, and the rubber magnet sets up in the blade part and is in contact with the blade part, and the rubber magnet is set up on the stator.

[0016] Optimal, still include the first gasket and the second gasket, and the first gasket and the second gasket all are arranged on the axle core, and the first gasket is located between the first bearing and the spring, and the second gasket is located between the clamping spring and the second bearing.

[0017] Optimal, the axle core is ceramic axle core.

[0018] By adopting the above technical solution, this utility model has the following beneficial effects:

[0019] (1) In this utility model, the mounting part is provided with an insulating part, which is located inside the metal tube. The first bearing and the second bearing are both in contact with the insulating part. In actual use, the first bearing and the second bearing do not contact the metal tube and will not form a current loop. Therefore, the risk of electro-corrosion can be greatly reduced. Compared with the prior art, there is no need to use aluminum layer, ceramic layer or other solutions to prevent electro-corrosion. The cost is low and it is easy to process and assemble.

[0020] (2) The shaft core of this utility model can be a ceramic shaft core, which makes it easier to further reduce the risk of electro-corrosion;

[0021] (3) The integrated rotating shaft fan blade structure of this utility model is an integrated structure, which is convenient for assembly.

[0022] In summary, this utility model has the advantages of low cost, easy assembly, and effective reduction of the risk of electro-corrosion. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0025] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0026] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of the utility model, it is to explain that, unless there is explicit provision and limitation, the term "installation", "connection" should be broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected;Can be mechanical connection, can be electrical connection;Can be directly connected, can be indirectly connected through the intermediate medium, can be the communication inside two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0029] Embodiment 1

[0030] In this embodiment, the bearing electric corrosion resistant fan is proposed, which can cut off the current loop formed on the bearing inside, prevent the bearing electric corrosion.

[0031] As Figure 1 As shown in one embodiment of the utility model, the bearing electric corrosion resistant fan of the utility model comprises a fan frame 1, a metal pipe 2, a stator 3, a PCB board 4 and an integrated shaft blade structure, wherein the fan frame 1 is provided with a mounting portion 11, the inner side of the mounting portion 11 is connected with an insulating portion 12, the metal pipe 2 is arranged in the mounting portion 11, the metal pipe 2 is provided with a passing area, the outer wall of the insulating portion 12 is arranged on the inner side of the metal pipe 2 and is attached to the inner wall of the metal pipe 2, the insulating portion 12 comprises a first portion 121, the first portion 121 is connected with the mounting portion 11 through the passing area, the stator 3 is sleeved on the mounting portion 11, the PCB board 4 is arranged on the fan frame 1 and is connected with the stator 3, and the integrated shaft blade structure is arranged in the fan frame 1 and is rotatably connected in the insulating portion 12, wherein the mounting portion 11 is columnar as a whole and is open upward and downward along the direction of the columnar mounting portion 11, that is, the mounting portion 11 is hollow, the fan frame 1 is provided with a stationary blade on the lower side, the insulating portion 12 can be made of insulating material as a whole, the metal pipe 2 can be a copper pipe or the like structure, the copper pipe is arranged in the hollow area of the mounting portion 11, the copper pipe is provided with a passing area in particular, the outer wall of the insulating portion 12 is arranged on the inner side of the copper pipe and is attached to the inner wall of the copper pipe, the insulating portion 12 comprises a first portion 121, the first portion 121 is connected with the mounting portion 11 through the passing area, and the connecting line of the PCB board 4 of the utility model passes through the fan frame 1 or even the outer side of the fan frame 1.

[0032] Please continue to refer to Figure 1The utility model discloses an integral type rotating shaft fan blade structure, which comprises a fan blade part 5, a shell part 6 and a shaft core 7, the shell part 6 is arranged in the fan blade part 5, a plurality of fan blades 51 are arranged on the fan blade part 5, the plurality of fan blades 51 can be uniformly arranged, one end of the shaft core 7 penetrates the fan blade part 5 and is connected with the shell part 6, the other end of the shaft core 7 extends into an insulating part 12, the fan blade part 5 is arranged in a fan frame 1 and is sleeved on a stator 3, the shell part 6 and the shaft core 7 can be metal structures, or the shaft core 7 is a ceramic shaft core 7, the ceramic shaft core 7 is beneficial to reducing electric corrosion, the integral type rotating shaft fan blade structure can be integrally formed, that is, the shaft core 7, the fan blade part 5 and the shell part 6 are injection molded together through an injection molding process, the shaft core 7 is rotatably connected in the insulating part 12 through a first bearing 8 and a second bearing 9, the first bearing 8 and the second bearing 9 are arranged on the shaft core 7 in an upper and lower interval mode, the outer walls of the first bearing 8 and the second bearing 9 are in abutting connection with the insulating part 12, the first bearing 8, the second bearing 9, the insulating part 12 and the metal pipe 2 and other structures in the utility model are mutually adapted, the first bearing 8 and the second bearing 9 are located at appropriate positions in the insulating part 12, a spring 1000 is arranged between the first bearing 8 and the fan blade part 5, the spring 1000 is sleeved on the shaft core 7, one end of the shaft core 7 away from the shell part 6 is provided with a clamping groove, a clamping spring 1001 is arranged in the clamping groove, and the clamping spring 1001 is located at the lower side of the second bearing 9, the utility model further comprises a glue magnet, the glue magnet is arranged in the fan blade part 5 and is in abutting connection with the fan blade part 5, the glue magnet is sleeved on the stator 3, the utility model further comprises a first gasket 2000 and a second gasket 3000, the first gasket 2000 and the second gasket 3000 are arranged on the shaft core 7, the first gasket 2000 is located between the first bearing 8 and the spring 1000, and the second gasket 3000 is located between the clamping spring 1001 and the second bearing 9, in the utility model, the region, where the spring 1000 is close to the fan blade part 5 and contacts the fan blade part 5, is a plastic region, that is, the shell part 6 is injection molded in the fan blade part 5, and the shaft core 7 penetrates the fan blade part 5 and is connected with the shell part 6, the side, where the spring 1000 is close to the shell part 3 and directly contacts, is the fan blade part 2, the first gasket 2000 and the second gasket 3000 can be insulating gaskets, the spring 1000 does not directly contact the first bearing 8, and the clamping spring 1001 does not directly contact the second bearing 9.

[0033] In the utility model, the first bearing 8, the second bearing 9 and the metal pipe 2 are insulated by the arrangement of the insulating part 12 and the arrangement of the first gasket 2000 and the second gasket 3000, so that the electric circuit among the shaft core 7, the bearing and the metal pipe 2 in the prior art is damaged, the electric corrosion phenomenon is reduced, on the basis, the ceramic shaft core 7, especially the non-conductive ceramic shaft core 7, is more beneficial to reducing the electric corrosion phenomenon.

[0034] The utility model discloses a bearing electric corrosion resistance fan's assembling method, comprising the following steps:

[0035] S1, take the fan frame 1, then take the metal pipe 2, set the metal pipe 2 in the mounting portion 11 of the fan frame 1, then set the insulating portion 12 in the metal pipe 2 so that the insulating portion 12 is connected with the mounting portion 11, specifically, the insulating portion 12 can not be set first when assembling, but the metal pipe 2, i.e. the copper pipe, is installed in the mounting portion 11, and then the insulating portion 12 is processed inside the copper pipe so that the insulating portion 12 is connected with the mounting portion 11, the insulating portion 12 can be processed by injection molding, spraying and other processes;

[0036] S2, take the glue magnet, so that the glue magnet is in contact with the fan blade 51 portion 5 of the integrated shaft fan blade 51 structure, then take the stator 3 and the PCB board 4, and then set the stator 3 and the PCB board 4 on the mounting portion 11, and then connect the stator 3 and the PCB board 4, the integrated shaft fan blade 51 structure in the utility model is integrally formed;

[0037] S3, take the spring 1000, the first bearing 8, the second bearing 9 and the circlip 1001, then set the spring 1000, the first bearing 8, the second bearing 9 and the circlip 1001 on the shaft core 7, then extend the shaft core 7, the spring 1000, the first bearing 8, the second bearing 9 and the circlip 1001 into the mounting portion 11, so that the outer walls of the first bearing 8 and the second bearing 9 are in contact with the insulating portion 12.

[0038] The embodiment is not limited in shape, material, structure and the like of the utility model in any form, any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model are within the protection scope of the technical scheme of the utility model.

Claims

1. An electrically erosion resistant bearing fan characterized by, The application relates to a fan frame and a one-piece rotating shaft fan blade structure. The fan frame comprises a fan frame body, an installation part arranged in the fan frame body, an insulating part connected to the inner side of the installation part, a metal pipe arranged in the installation part, a through area arranged on the metal pipe, an outer wall of the insulating part arranged on the inner side of the metal pipe and matched with the inner wall of the metal pipe, a first part of the insulating part, a stator arranged on the installation part, a PCB board arranged on the fan frame body and connected to the stator, and the one-piece rotating shaft fan blade structure arranged in the fan frame body and rotationally connected in the insulating part. The one-piece rotating shaft fan blade structure comprises a fan blade part, a shell part and a shaft core, the shell part is arranged in the fan blade part, a plurality of fan blades are arranged on the fan blade part, one end of the shaft core is connected to the shell part through the fan blade part, the other end of the shaft core extends into the insulating part, the fan blade part is arranged in the fan frame body and sleeved on the stator. The shaft core is rotationally connected in the insulating part through a first bearing and a second bearing, the first bearing and the second bearing are arranged on the shaft core in an up-down interval, and the outer walls of the first bearing and the second bearing are in abutting connection with the insulating part. The metal pipe is a copper pipe, a spring is arranged between the first bearing and the fan blade part, the spring is sleeved on the shaft core, one end of the shaft core away from the shell part is provided with a clamping groove, a clamping spring is arranged in the clamping groove, and the clamping spring is located on the lower side of the second bearing. The application further comprises a first gasket and a second gasket, the first gasket and the second gasket are arranged on the shaft core, the first gasket is located between the first bearing and the spring, and the second gasket is located between the clamping spring and the second bearing.

2. The electrically erosion resistant bearing fan of claim 1, wherein: The application further comprises a glue magnet, the glue magnet is arranged in the fan blade part and in abutting connection with the fan blade part, and the glue magnet is sleeved on the stator.

3. The electrically erosion resistant bearing fan of claim 2, wherein: The shaft core is a ceramic shaft core.

4. The electrically erosion resistant bearing fan of claim 3, wherein: ​ 5. The electrically erosion resistant bearing fan of claim 4, wherein: ​ 6. The electrically erosion resistant bearing fan of claim 5, wherein: ​ 7. The electrically erosion resistant bearing fan of claim 6, wherein: ​

Images