CN213064016U

CN213064016U - Centrifugal fan

Info

Publication number: CN213064016U
Application number: CN202021623408.1U
Authority: CN
Inventors: 张章
Original assignee: Shanghai Walker General Equipment Co ltd
Current assignee: Shanghai Walker General Equipment Co ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2021-04-27
Anticipated expiration: 2030-08-06

Abstract

The utility model relates to a centrifugal fan, it includes the frame, the frame is put on the shelf and is had the fan casing, install the impeller in the fan casing, be provided with the pivot on the impeller, the one end of pivot is connected with positive reverse motor, install the shock detection appearance that is used for detecting the impeller rotation condition in the frame. This application helps preventing that dust from getting off at the impeller deposit, promotes production security effect.

Description

Centrifugal fan

Technical Field

The application relates to the technical field of centrifugal fans, in particular to a centrifugal fan.

Background

At present, a centrifugal fan is a machine for conveying gas, and is widely applied to industrial production processes such as electric power, metallurgy, cement, wood processing, tobacco and the like, and gas is accelerated by utilizing an impeller rotating at a high speed, and then is decelerated and changed in flow direction, so that kinetic energy is converted into potential energy. In a centrifugal fan, gas enters an impeller from an axial direction, and the gas changes to a radial direction as it flows through the impeller.

In the correlation technique, after centrifugal fan operated for a period of time, the inside dust that has accumulated the degree of impeller, some positions are because of the produced centrifugal force when the fan was rotatory surpasss the cohesion between dust and impeller surface, the dust and drops to make the impeller lose original balance and lead to the vibration that produces the fan.

In view of the above-mentioned related art, the inventor believes that there are defects that a large amount of dust is deposited on the impeller, and the dust is highly adhesive at high temperature, thereby affecting the production safety.

SUMMERY OF THE UTILITY MODEL

In order to improve a large amount of dust and deposit on the impeller, it is great to add the dust cohesiveness under the high temperature to influence production safety, this application provides a centrifugal fan.

The application provides a centrifugal fan adopts following technical scheme:

the utility model provides a centrifugal fan, includes the frame, the frame is put on the shelf and is had the fan casing, install the impeller in the fan casing, be provided with the pivot on the impeller, the one end of pivot is connected with positive reverse motor, install the vibrations detector that is used for detecting the impeller rotation condition in the frame.

Through adopting above-mentioned technical scheme, in the application, the staff with impeller installation in the fan casing, then be connected positive and negative motor with the pivot on the impeller, send out the police dispatch newspaper when vibrations detector on the frame detects impeller rotation and surpasses safety standard value, staff control positive and negative motor reversal motion in the twinkling of an eye takes out the dust on the impeller, helps preventing that dust from getting off on the impeller deposit, promotes the production security.

Preferably, a central controller and a reverse contactor are arranged between the vibration detector and the forward and reverse rotating motor, the vibration detector is electrically connected with the central controller, the central controller is electrically connected with the reverse contactor, and the reverse contactor is electrically connected with the forward and reverse rotating motor.

Through adopting above-mentioned technical scheme, through shock detector, central controller, reversal contactor and positive reverse motor, help having the degree of automation that promotes the clearance dust, promote staff's work efficiency.

Preferably, a bearing seat is installed on the rack, and the rotating shaft is rotatably erected on the bearing seat.

Through adopting above-mentioned technical scheme, by establishing the pivot rotating turret on the bearing frame, help promoting the stability of pivot in the rotation process.

Preferably, a coupling is connected between the rotating shaft and the forward and reverse rotating motor.

Through adopting above-mentioned technical scheme, through set up the shaft coupling between pivot and positive reverse motor, convenience when helping promoting staff later maintenance positive reverse motor.

Preferably, the impeller comprises a fan blade disc and a plurality of blades, the blades are arranged at intervals around the axis of the fan blade disc, and any one of the blades and the fan blade disc are integrally formed.

Through adopting above-mentioned technical scheme, through setting up fan blade dish and blade integrated into one piece, help promoting the convenience of impeller in process of production.

Preferably, any one of the blades is arranged straight, and any one of the blades is perpendicular to the surface of the fan blade disc.

Through adopting above-mentioned technical scheme, through being straight setting with the blade, help simplifying the blade structure, promote staff's production efficiency.

Preferably, two opposite sides of any two adjacent blades are arranged in an arc surface.

Through adopting above-mentioned technical scheme, through being the cambered surface setting with the blade, help promoting the air supply efficiency of blade.

Preferably, the fan shell comprises a first shell and a second shell which are detachably connected, the first shell is provided with an air inlet, and the second shell is provided with an air outlet.

Through adopting above-mentioned technical scheme, through setting up the fan shell into first shell and the second shell that can dismantle the connection, help the convenience of staff's later stage to fan casing internal maintenance.

In summary, the present application includes at least one of the following beneficial technical effects:

1. through the arrangement of the vibration detector and the forward and reverse rotating motor, dust is prevented from being deposited on the impeller, and the production safety is improved;

2. through setting up impeller into integrated into one piece's fan blade dish and blade to and set up the fan casing into dismantling the first casing of connection and the convenience that the second casing helps promoting staff's later maintenance.

Drawings

FIG. 1 is a schematic view of an overall structure of a centrifugal fan;

FIG. 2 is a schematic view mainly showing the structure of an impeller;

fig. 3 is a schematic flow chart mainly showing that the vibration detector controls the forward and reverse rotating motor.

Reference numerals: 1. a frame; 11. a bearing seat; 2. a fan housing; 21. a first housing; 211. an air inlet; 22. a second housing; 221. an air outlet; 3. an impeller; 31. a fan blade disc; 32. a blade; 4. a rotating shaft; 41. a coupling; 5. a vibration detector; 6. a central controller; 7. reversing the contactor; 8. a positive and negative rotation motor.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses centrifugal fan.

Referring to fig. 1 and 3, a centrifugal fan, which comprises a frame 1, a fan housing 2 is erected on the frame 1, an impeller 3 is installed in the fan housing 2, a rotating shaft 4 is arranged on the impeller 3, one end of the rotating shaft 4 is connected with a forward and reverse rotation motor 8, a vibration detector 5 for detecting the rotation condition of the impeller 3 is installed on the frame 1, a central controller 6 and a reverse rotation contactor 7 are arranged between the vibration detector 5 and the forward and reverse rotation motor 8, the vibration detector 5 is electrically connected with the central controller 6, the central controller 6 is electrically connected with the reverse rotation contactor 7, and the reverse rotation contactor 7 is electrically connected with the forward and reverse rotation motor 8.

In the application, the vibration detector 5 detects that the vibration value of the impeller 3 exceeds a safety range, the vibration detector 5 transmits a signal to the central controller 6, then the central controller 6 controls the reverse contactor 7, and then the reverse contactor 7 controls the forward and reverse rotating motor 8 to rotate reversely, so that dust on the impeller 3 is removed.

Referring to fig. 1 and 2, the impeller 3 includes a blade disc 31 and blades 32, the blades 32 are uniformly spaced around the axis of the blade disc 31, two opposite sides of any two adjacent blades 32 are both arc-shaped, any blade 32 is straight and vertical to the surface of the blade disc 31, and one end of any blade 32 close to the blade disc 31 is integrally formed with the blade disc 31.

The fan housing 2 includes a first housing 21 and a second housing 22 detachably connected to each other, the first housing 21 is provided with an air inlet 211, and the second housing 22 is provided with an air outlet 221. The impeller 3 is embedded in the second housing 22, and the rotating shaft 4 of the impeller 3 passes through the second housing 22. The bearing seats 11 are installed on the frame 1, the bearing seats 11 are provided with two, the axis of any one bearing seat 11 is coincident with the axis of the impeller 3, the rotating shaft 4 penetrates through the two bearing seats 11 respectively, one end, far away from the second shell 22, of the rotating shaft 4 is connected with the coupler 41, and the coupler 41 is connected with the forward and reverse rotating motor 8

The implementation principle of the centrifugal fan in the embodiment of the application is as follows: in the application, the impeller 3 in the second casing 22 rotates forward under the driving of the forward and reverse rotation motor 8, dust is collected on the surface of the impeller 3, the impeller 3 vibrates, when the vibration detector 5 detects that the vibration value of the impeller 3 exceeds a safety range, the vibration detector 5 transmits a signal to the central controller 6, then the central controller 6 controls the reverse rotation contactor 7, then the reverse rotation contactor 7 controls the forward and reverse rotation motor 8 to rotate backward, the forward and reverse rotation motor 8 drives the impeller 3 to rotate backward, and the dust on the impeller 3 is removed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a centrifugal fan, includes frame (1), its characterized in that: frame (1) upper bracket has fan casing (2), install impeller (3) in fan casing (2), be provided with pivot (4) on impeller (3), the one end of pivot (4) is connected with just reversing motor (8), install vibration detection appearance (5) that are used for detecting impeller (3) rotation condition on frame (1).

2. The centrifugal fan according to claim 1, wherein: be provided with central controller (6) and reversal contactor (7) between shock detection appearance (5) and positive reverse motor (8), shock detection appearance (5) are connected with central controller (6) electricity, central controller (6) are connected with reversal contactor (7) electricity, reversal contactor (7) are connected with positive reverse motor (8) electricity.

3. The centrifugal fan according to claim 1, wherein: the bearing seat (11) is installed on the rack (1), and the rotating shaft (4) is rotatably erected on the bearing seat (11).

4. The centrifugal fan according to claim 1, wherein: and a coupler (41) is connected between the rotating shaft (4) and the forward and reverse rotating motor (8).

5. The centrifugal fan according to claim 1, wherein: the impeller (3) comprises a fan blade disc (31) and a plurality of blades (32), wherein the blades (32) are arranged at intervals around the axis of the fan blade disc (31), and any one of the blades (32) and the fan blade disc (31) are integrally formed.

6. The centrifugal fan according to claim 5, wherein: any blade (32) is arranged straight, and any blade (32) is perpendicular to the surface of the fan blade disc (31).

7. The centrifugal fan according to claim 5, wherein: two opposite sides of any two adjacent blades (32) are arranged in a cambered surface mode.

8. The centrifugal fan according to claim 1, wherein: the fan shell (2) comprises a first shell (21) and a second shell (22) which are detachably connected, an air inlet (211) is formed in the first shell (21), and an air outlet (221) is formed in the second shell (22).