CN-224228958-U - Fixing structure of current collector of centrifugal fan

Abstract

The utility model provides a fixing structure of a current collector of a centrifugal fan, and belongs to the technical field of fans. The current collector solves the technical problems that a current collector of an existing fan is easy to shake and the like. The utility model provides a fixed knot of centrifugal fan current collector constructs, including support and spiral case, be provided with the impeller in the spiral case, the spiral case includes preceding fixed shell, back fixed shell and snail form shell, be provided with the air intake relative with the impeller on the preceding fixed shell, be provided with the current collector in the air intake, the current collector includes loudspeaker air inlet portion, horizontal part, the portion that contracts and connecting portion, loudspeaker air inlet portion and horizontal part are located the outside of spiral case, the portion that contracts and connecting portion are located the inside of spiral case, horizontal part periphery fixedly connected with mount, the outside at preceding fixed shell is fixed to the mount, the inboard fixedly connected with at least two supporting shoe of preceding fixed shell, the supporting shoe equipartition is around the periphery at the portion that contracts and with the portion that contracts support. The utility model has stronger capability of resisting vibration, improves the reliability of the whole current collector structure and the operation of the fan and prolongs the service life.

Inventors

• WANG BENFANG

Assignees

• 浙江起霸风机科技有限公司

Dates

Publication Date

20260512

Application Date

20250624

Claims (5)

1. 1. The utility model provides a fixed knot of centrifugal fan current collector constructs, includes support (1) and spiral case (2) of fixing on support (1), is provided with impeller (4) in spiral case (2), spiral case (2) are including preceding fixed shell (201), back fixed shell (202) and through preceding fixed shell (201) and back fixed shell (202) fixed connection's spiral case shell (203), preceding fixed shell (201) on be provided with air intake (2011) relative with impeller (4), air intake (2011) in be provided with current collector (3), wherein current collector (3) include loudspeaker air inlet portion (301), horizontal part (302), throat portion (303) and connecting portion (304) that connect gradually from outside to inside, loudspeaker air inlet portion (301) and horizontal part (302) be located the outside of spiral case (2), throat portion (303) and connecting portion (304) be located the inside of spiral case (2), horizontal part (302) periphery fixed connection have mount (5) with, 5) are at least two fixed outside fixed block (201) fixed block (6) before fixed shell (201), the supporting blocks (6) are uniformly distributed around the periphery of the necking part (303) and are abutted against the necking part (303).
2. 2. The fixing structure of the centrifugal fan current collector is characterized in that a first fixing hole (2012) and a second fixing hole (2013) which are circumferentially and uniformly distributed are formed in a front fixing shell (201), the first fixing hole (2012) surrounds the periphery of the second fixing hole (2013), the supporting block (6) is fixedly connected with the second fixing hole (2013) through a second fixing piece (9), the fixing frame (5) is fixedly connected with the fixing frame (5) through a first fixing piece (8), a yielding hole (501) is formed in the fixing frame (5), and the yielding hole (501) is opposite to the second fixing piece (9).
3. 3. The fixing structure of the centrifugal fan current collector is characterized in that the fixing frame (5) comprises a circular plate (502) and fixing plates (503) circumferentially distributed on the circular plate (502), the yielding holes (501) are formed in the circular plate (502), one side of the fixing plates (503) is fixedly welded with the circular plate (502), one side of the fixing plates (503) perpendicular to the circular plate (502) is fixedly welded with the periphery of the horizontal portion (302), and triangular notches (504) are formed among the fixing plates (503), the circular plate (502) and the horizontal portion (302).
4. 4. The structure according to claim 1, wherein the supporting block (6) has four blocks, the supporting block (6) includes a fixing portion (601) and an abutting portion (602), the fixing portion (601) is fixedly connected with the front fixing case (201), and the abutting portion (602) has an inclined surface abutting against the necking portion (303).
5. 5. The structure for fixing a current collector of a centrifugal fan according to any one of claims 1 to 4, wherein the impeller (4) is connected with a driving shaft (7), the driving shaft (7) is connected with a driving motor, and one end of the impeller (4) far away from the driving shaft (7) is embedded into the connecting portion (304) and has a gap with the inner periphery of the connecting portion (304).

Description

Fixing structure of current collector of centrifugal fan Technical Field The utility model belongs to the technical field of fans, and particularly relates to a fixing structure of a current collector of a centrifugal fan. Background The centrifugal fan is a machine for increasing the pressure of gas and discharging the gas by means of input mechanical energy. Centrifugal fans are widely used for ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and air induction of boilers and industrial furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and selection of grains, inflation and propulsion of wind tunnel wind sources and air cushion ships, and the like. The centrifugal fan realizes the functions of sucking, pressurizing and discharging gas through the cooperative work of a collector, an impeller, a volute, a driving device and the like. Wherein the collector is positioned at the inlet end of the volute, typically in the shape of a flare, and functions to direct gas smoothly and uniformly into the central region of the impeller, reducing inlet flow losses. In the prior art, a collector of a centrifugal fan under the working conditions of large air quantity and high full pressure can shake in the air inlet process, and the shaking collector can influence the flow velocity of air inlet and the working efficiency of the centrifugal fan. Disclosure of Invention Aiming at the defects existing in the prior art, the utility model aims to provide a fixing structure of a current collector of a centrifugal fan. The utility model can be realized by the following technical scheme that the fixing structure of the centrifugal fan current collector comprises a bracket and a volute fixed on the bracket, wherein an impeller is arranged in the volute, the volute comprises a front fixing shell, a rear fixing shell and a volute-shaped shell fixedly connected through the front fixing shell and the rear fixing shell, an air inlet opposite to the impeller is arranged on the front fixing shell, the current collector is arranged in the air inlet, the current collector comprises a horn air inlet part, a horizontal part, a shrinkage part and a connecting part which are sequentially and smoothly connected from outside to inside, the horn air inlet part and the horizontal part are positioned outside the volute, the shrinkage part and the connecting part are positioned inside the volute, a fixing frame is fixedly connected to the periphery of the horizontal part, the fixing frame is fixed on the outer side of the front fixing shell, at least two supporting blocks are fixedly connected to the inner side of the front fixing shell, and the supporting blocks uniformly surround the periphery of the shrinkage part and are abutted against the shrinkage part. Further, the front fixing shell on be provided with fixed orifices and fixed orifices second that are circumference equipartition, fixed orifices first around the periphery at fixed orifices second, the supporting shoe pass through mounting second and fixed orifices second fixed connection, the mount pass through mounting first and mount fixed connection, the mount on be provided with the hole of stepping down, the hole of stepping down set up with the mounting is relative. Further, the mount include ring board and circumference equipartition fixed plate on the ring board, the hole of stepping down on the ring board, one side and the ring board welded fastening of fixed plate one side and the horizontal part periphery welded fastening of perpendicular ring board of fixed plate, ring board and horizontal part between be formed with the triangle breach. Further, the support block has four, the support block include fixed part and support portion, fixed part and preceding fixed shell fixed connection, support portion have with the inclined plane that the shrink mouth supported. Further, the impeller is connected with a driving shaft, the driving shaft is connected with a driving motor, and one end, far away from the driving shaft, of the impeller is embedded into the connecting portion and is provided with a gap with the inner periphery of the connecting portion. The utility model has the technical effects that firstly, the external main body part of the current collector is rigidly connected and locked at the outer side of the front fixing shell through the fixing frame fixed at the outer periphery of the horizontal part of the current collector, and the supporting blocks which are uniformly distributed at the inner periphery of the front fixing shell directly lean against the outer periphery of the shrinkage part of the key transition area of the current collector, so that the radial displacement and vibration of the current collector in the volute are effectively limited, the rigid fixing at the outer side is combined with the circumferential support at the inn