Centrifugal fan

Abstract

The utility model discloses a centrifugal fan which comprises a rotating shaft, one end of the rotating shaft is connected with a motor, the other end of the rotating shaft extends into a fan shell and is connected with a centrifugal fan, a cooling device is arranged on the rotating shaft, and the cooling device is located between the motor and the fan shell. The cooling device comprises a protective cover and a plurality of annular cooling fins fixedly connected to the rotating shaft, the annular cooling fins extend in the axis direction of the rotating shaft, a plurality of spray pipes are arranged on the protective cover, each spray pipe is located between every two adjacent annular cooling fins, and nozzles of the spray pipes face and are close to the surface of the rotating shaft; a water supply pipe is arranged on the protective cover and connected with all the spray pipes, a water drainage pipe is arranged at the bottom of the protective cover, and sealing mechanisms are arranged between the two sides of the protective cover and the rotating shaft, so that the heat dissipation efficiency of the rotating shaft is improved, the temperature of the rotating shaft is reduced, and various faults caused by high temperature are avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan technical field, more specifically relates to a centrifugal fan. BACKGROUND

[0002] The centrifugal fan inhales air from one side of the centrifugal fan, then gas is thrown from the center, and high pressure airflow is formed around the fan, and finally discharged from the air outlet, and the rapid airflow generated can be used to heat dissipation of equipment and materials.

[0003] Therefore, the centrifugal fan for heat dissipation is often installed near the equipment or materials with higher temperature, and since the motor driving the fan has large power, it also emits large heat, which causes the rotating shaft of the fan to be always in a double heat environment, and various faults such as abnormal sound, vibration, and even seizure are prone to occur due to high temperature, and the service life of the fan is reduced due to increased wear.

[0004] Therefore, the heat dissipation of the main shaft of the centrifugal fan is also important. UTILITY MODEL CONTENT

[0005] In view of the deficiencies of the prior art, the utility model provides a centrifugal fan, which is provided with a cooling device on the rotating shaft, so as to improve the heat dissipation efficiency of the rotating shaft, reduce the temperature of the rotating shaft, and avoid various faults caused by high temperature.

[0006] To achieve the above object, the utility model provides the following technical scheme: a centrifugal fan, comprising a rotating shaft, one end of the rotating shaft is connected with a motor, the other end of the rotating shaft extends into a fan shell and is connected with a centrifugal fan, a cooling device is arranged on the rotating shaft, and the cooling device is located between the motor and the fan shell, the cooling device comprises a protective cover and a plurality of annular cooling fins fixedly connected to the rotating shaft, the plurality of annular cooling fins extend along the axis direction of the rotating shaft, a plurality of spray pipes are arranged on the protective cover, each spray pipe is located between two adjacent annular cooling fins, and the nozzle of the spray pipe faces and is close to the surface of the rotating shaft, a water supply pipe is arranged on the protective cover, the water supply pipe is connected with all the spray pipes, a drain pipe is arranged at the bottom of the protective cover, and a sealing mechanism is arranged between the two sides of the protective cover and the rotating shaft.

[0007] Further, the sealing mechanism comprises a first support ring located at the two sides of the protective cover, the outer side of the first support ring is sealingly connected with the protective cover, a plurality of first annular sealing teeth are arranged on the inner side of the first support ring, a second support ring corresponding to the first support ring is arranged on the rotating shaft, a plurality of second annular sealing teeth are arranged on the second support ring, the first annular sealing teeth and the second annular sealing teeth are arranged in a staggered manner along the axis direction of the rotating shaft, the inner side of the first annular sealing teeth and the outer side of the second annular sealing teeth are both pointed, the inner side pointed end of the first annular sealing teeth is close to the second support ring, and the outer side pointed end of the second annular sealing teeth is close to the first support ring.

[0008] Furthermore, the two second support rings are connected to each other to form a support cylinder, the annular cooling fin is located on the support cylinder, and the connection gap between the support cylinder and the rotating shaft is filled with a heat conductive layer.

[0009] Furthermore, the outer side of the annular cooling fin is a pointed end.

[0010] Furthermore, the bottom of the protective cover is inclined, and the drain pipe is located at the inclined bottom.

[0011] Compared with the prior art, the beneficial effects of the present invention are: when the rotating shaft rotates, the annular cooling fins are driven to rotate. When the temperature on the rotating shaft is high and needs to be cooled, the water supply pipe box nozzle supplies water, so that the nozzle of the nozzle sprays cooling water toward the rotating shaft. When the cooling water touches the rotating shaft, it will flow to both sides and contact the annular cooling fins. Due to the rotation of the annular cooling fins, the cooling water above will be thrown outward on the annular cooling fins due to centrifugal force, and the contact area between the cooling water and the rotating shaft is indirectly increased through the annular cooling plate, thereby improving the heat dissipation efficiency of the rotating shaft, reducing the temperature of the rotating shaft, and avoiding various faults caused by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the cooling device in the centrifugal fan of the utility model.

[0013] Reference numerals: rotating shaft 1 ; protective cover 2 ; annular cooling fin 3 ; nozzle 4 ; water supply pipe 5 ; drain pipe 6 ; first support ring 7 ; first annular sealing teeth 8 ; second support ring 9 ; second annular sealing teeth 10 ; support cylinder 11 . DETAILED DESCRIPTION

[0014] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific protection scope of the present invention.

[0015] In addition, the terms "first", "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first", "second" features can explicitly or implicitly include one or more features, and in the description of the utility model, the meaning of "several" is two or more than two, unless otherwise explicitly specified.

[0016] The utility model is further illustrated with reference to the drawings.

[0017] A centrifugal fan, including the rotating shaft 1, one end of the rotating shaft 1 is connected motor, the other end stretches into the fan shell and is connected centrifugal fan, the rotating shaft 1 is provided with cooling device, and cooling device is located between motor and fan shell, the cooling device includes the protective cover 2 and the annular cooling fin 3 of being fixedly connected on the rotating shaft 1, several annular cooling fin 3 extends along the axis direction of the rotating shaft 1, the protective cover 2 is provided with several spray pipes 4, and each spray pipe 4 is located between the adjacent two annular cooling fin 3, and the nozzle of spray pipe 4 is towards and close to the surface of the rotating shaft 1, the protective cover 2 is provided with water supply pipe 5, the water supply pipe 5 connects all spray pipes 4, the bottom of the protective cover 2 is provided with drain pipe 6, and the both sides of the protective cover 2 are provided with sealing mechanism between the rotating shaft 1.

[0018] As Figure 1 Shown, the rotating shaft 1 rotates and drives annular cooling fin 3 to rotate, when the temperature on the rotating shaft 1 is higher and needs to be cooled, the water supply pipe 5 tank spray pipe 4 supplies water, and the nozzle of spray pipe 4 sprays cooling water to the rotating shaft 1, when the cooling water touches the rotating shaft 1, it will flow to both sides and contact annular cooling fin 3, and because of the rotation of annular cooling fin 3, the cooling water on it will be thrown outwards on annular cooling fin 3 due to centrifugal force, indirectly increase the contact area between cooling water and the rotating shaft 1 through annular cooling plate, thereby improving the heat dissipation efficiency of the rotating shaft 1, reducing the temperature of the rotating shaft 1, avoiding various faults due to high temperature.

[0019] As Figure 1 Shown, in the preferred embodiment of the present application, the sealing mechanism includes the first support ring 7 on both sides of the protective cover 2, the outer side of the first support ring 7 is sealingly connected with the protective cover 2, the inner side of the first support ring 7 is provided with a plurality of first annular sealing teeth 8, the rotating shaft 1 is provided with the second support ring 9 corresponding to the first support ring 7, the second support ring 9 is provided with a plurality of second annular sealing teeth 10, the first annular sealing teeth 8 and the second annular sealing teeth 10 are staggered arranged along the axis direction of the rotating shaft 1, the inner side of the first annular sealing teeth 8 and the outer side of the second annular sealing teeth 10 are both pointed, the inner side of the first annular sealing teeth 8 is close to the second support ring 9, and the outer side of the second annular sealing teeth 10 is close to the first support ring 7.

[0020] Specifically, the second annular sealing teeth 10 rotate with the rotating shaft 1 , thereby forming a plurality of seals with the first annular sealing teeth 8 to prevent the cooling water in the protective cover 2 from flowing out.

[0021] like Figure 1 As shown, in this embodiment, preferably, the two second support rings 9 are connected to each other to form a support cylinder 11, the annular cooling fin 3 is located on the support cylinder 11, and the connection gap between the support cylinder 11 and the rotating shaft 1 is filled with a heat conductive layer.

[0022] Specifically, the cooling water is prevented from directly contacting the rotating shaft 1 and causing uneven heating inside and outside the rotating shaft 1 , and the supporting tube 11 can evenly and continuously dissipate heat from the rotating shaft 1 .

[0023] Specifically, the support cylinder 11 and the rotating shaft 1 are fixedly connected by means of bolts or the like.

[0024] Specifically, the heat-conducting layer can be a viscous liquid with good thermal conductivity, such as thermal conductive glue, or a material with good thermal conductivity, such as copper.

[0025] Specifically, the support tube 11 and the annular cooling fin 3 are made of a material with good thermal conductivity, such as copper.

[0026] like Figure 1 As shown, in this embodiment, preferably, the outer side of the annular cooling fin 3 is a pointed end.

[0027] like Figure 1 As shown, in this embodiment, preferably, the bottom of the protective cover 2 is inclined, and the drain pipe 6 is located at the inclined bottom to facilitate the collection of cooling water.

[0028] like Figure 1 As shown, specifically, the water supply pipe 5 and the drainage pipe 6 are connected to the cooling water circulation mechanism through pipelines to achieve the recycling of cooling water.

[0029] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A centrifugal fan, characterized in that: It includes a rotating shaft, one end of which is connected to the motor, and the other end extends into the fan housing and is connected to the centrifugal fan. A cooling device is provided on the rotating shaft, and the cooling device is located between the motor and the fan housing. The cooling device includes a protective cover and a plurality of annular cooling fins fixedly connected to the rotating shaft, and the plurality of annular cooling fins extend along the axis of the rotating shaft. The protective cover is provided with a plurality of nozzles, each nozzle is located between two adjacent annular cooling fins, and the nozzle of the nozzle is facing and close to the surface of the rotating shaft. The protective cover is provided with a water supply pipe, and the water supply pipe connects all the nozzles. A drain pipe is provided at the bottom of the protective cover, and a sealing mechanism is provided between the two sides of the protective cover and the rotating shaft.

2. The centrifugal fan according to claim 1, characterized in that: The sealing mechanism includes a first support ring located on both sides of the protective cover, the outer side of the first support ring is sealed and connected to the protective cover, a plurality of first annular sealing teeth are arranged on the inner side of the first support ring, a second support ring corresponding to the first support ring is provided on the rotating shaft, and a plurality of second annular sealing teeth are provided on the second support ring. The first annular sealing teeth and the second annular sealing teeth are staggered along the axis of the rotating shaft, the inner side of the first annular sealing teeth and the outer side of the second annular sealing teeth are both pointed, the inner side tip of the first annular sealing teeth is close to the second support ring, and the outer side tip of the second annular sealing teeth is close to the first support ring.

3. The centrifugal fan according to claim 2, characterized in that: The two second support rings are connected to each other to form a support cylinder. The annular cooling fin is located on the support cylinder. The connection gap between the support cylinder and the rotating shaft is filled with a heat-conducting layer.

4. The centrifugal fan according to claim 1, characterized in that: The outer side of the annular cooling fin is a pointed end.

5. The centrifugal fan according to claim 1, characterized in that: The bottom of the protective cover is inclined, and the drain pipe is located at the inclined bottom.

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