CN210889495U

CN210889495U - Dust protected centrifugal fan

Info

Publication number: CN210889495U
Application number: CN201921282615.2U
Authority: CN
Inventors: 余培铨; 徐洪海; 倪浩龙; 顾华鑫; 范林江
Original assignee: Zhejiang Rongwen Fans Co ltd
Current assignee: Zhejiang Rongwen Fans Co ltd
Priority date: 2019-08-08
Filing date: 2019-08-08
Publication date: 2020-06-30
Anticipated expiration: 2029-08-08

Abstract

The utility model discloses a dustproof centrifugal fan, which comprises a motor, a fixed frame, a hollow shell, an impeller and a dustproof mechanism, wherein the impeller and the dustproof mechanism are arranged in the hollow shell, the hollow shell is provided with an air inlet and an air outlet, the dustproof mechanism comprises a fixed plate arranged at the air inlet, a dustproof plate detachably arranged on the fixed plate and a connecting device used for connecting the fixed plate and the dustproof plate, the dustproof plate is arranged at the air inlet to separate sundries and dust, and the sundries and the dust are prevented from entering from the air inlet in the working process of the centrifugal fan; and the dust guard can be dismantled with the fixed plate and be connected, is convenient for clear up and change the dust guard.

Description

Dust protected centrifugal fan

Technical Field

The utility model belongs to the technical field of centrifugal fan, especially, relate to a dust protected centrifugal fan.

Background

The centrifugal fan is based on the principle that kinetic energy is converted into potential energy, and utilizes a blade fan rotating at high speed to accelerate, then decelerate and change the flow direction, so that the kinetic energy is converted into the potential energy (pressure). In a single stage centrifugal fan, the gas enters the impeller from an axial direction, changes to a radial direction as it flows through the impeller, and then enters the diffuser. In diffusers, the gas changes flow direction and the increase in conduit cross-sectional area slows the gas flow, which converts kinetic energy into pressure energy. The pressure increase occurs primarily in the impeller and secondarily in the diffusion process. In a multistage centrifugal fan, a flow reverser is used to direct the air flow to the next impeller, creating a higher pressure.

Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial kilns. A large amount of sundries and dust exist in the working environment of the centrifugal fan, and the sundries and the dust easily enter the fan from the air inlet in the working process of the centrifugal fan, so that the normal use of the fan is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art not enough, provide a dust protected centrifugal fan.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a dustproof centrifugal fan comprises a motor, a fixed frame, a hollow shell, an impeller and a dustproof mechanism, wherein the impeller and the dustproof mechanism are arranged in the hollow shell; the dust guard is arranged at the air inlet to block sundries and dust and prevent the sundries and the dust from entering from the air inlet in the working process of the centrifugal fan; and the dust guard can be dismantled with the fixed plate and be connected, is convenient for clear up and change the dust guard.

Preferably, the connecting device comprises a mounting hole formed in the fixing plate, connecting plates symmetrically arranged on the dust guard, a limiting groove formed in the inner wall of the mounting hole, a sliding groove formed in the fixing plate, a locking assembly and a rotating assembly, the mounting hole is used for the dust guard to enter, the sliding groove is used for the connecting plates to slide, and the sliding groove is communicated with the limiting groove; when the dust guard is installed, the connecting plate is aligned to the chute firstly, then the connecting plate is pressed into the bottom of the chute, then the dust guard is rotated to enable the connecting plate to be connected into the limiting groove, so that the dust guard is connected onto the fixing plate, the installation is convenient, and only the dust guard needs to be rotated to enable the connecting plate to be aligned to the chute when the dust guard is detached, and the dust guard is convenient to detach and replace.

Preferably, the locking assembly comprises a plurality of first elastic pieces arranged in the limiting groove, a top plate arranged on the end part of each first elastic piece, and a clamping groove arranged on the side wall of the limiting groove, and the clamping groove can be used for a connecting plate to enter; promote roof extrusion connecting plate through first elastic component and make the connecting plate enter into the draw-in groove when aligning with the draw-in groove, prevent that the dust guard from droing in the fan working process.

Preferably, the top surface and the bottom surface of the connecting plate are both provided with balls; can stop pressing the dust guard when the connecting plate enters into the spacing inslot, the initiative dust guard of being convenient for.

Preferably, the limiting groove is provided with an arc-shaped guide groove, and the arc-shaped guide groove is arranged at the communication position of the limiting groove and the sliding groove; the connecting plate can enter the limiting groove from the sliding groove conveniently.

Preferably, elastic blocks are symmetrically arranged on two side walls of the clamping groove; set up the elastic block and make fan dust guard self take place certain effect rotation in the course of the work, prevent that debris from piling up on the dust guard.

Preferably, the rotating assembly comprises an insertion hole formed in the dust guard, a rotating rod matched with the insertion hole, an insertion plate formed on the rotating rod, and an insertion slot formed in the dust guard, wherein the insertion slot is used for inserting the insertion plate; the dust-proof plate is convenient to press and rotate, and the rotating rod can be directly pulled out after the rotation is finished.

Preferably, a cross-shaped handle is arranged at the end part of the rotating rod.

Preferably, the fixing frame is provided with a fixing hole; the centrifugal fan is convenient to fix.

Preferably, the wrench is provided with a rubber plate, and a plurality of bulges are uniformly arranged on the rubber plate; the pressing comfort is improved.

In conclusion, the dust guard plate is arranged at the air inlet to block sundries and dust, so that the sundries and the dust are prevented from entering from the air inlet in the working process of the centrifugal fan; and the dust guard can be dismantled with the fixed plate and be connected, is convenient for clear up and change the dust guard.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of fig. 1 at a.

Fig. 3 is a schematic view of the dust-proof mechanism.

Fig. 4 is an enlarged view of fig. 3 at a.

Detailed Description

As shown in fig. 1-4, a dustproof centrifugal fan comprises a motor 1, a fixed frame 2, a hollow shell 3, an impeller and a dustproof mechanism, wherein a support at the bottom of the fixed frame 2 is provided with a fixed hole 21; the motor 1 is a conventional motor, is fixed on the fixed frame 2 and is used for driving the impeller to rotate; the impeller is a conventional centrifugal motor impeller and is fixed on an output shaft of the motor 1; the hollow shell 3 covers the impeller, and is provided with an air inlet 31 at one side and an air outlet 32 at the top.

Specifically, the dustproof mechanism comprises a fixed plate 4, a dustproof plate 41, a connecting plate 42, a limiting groove 43, a sliding groove 44, a first elastic piece 45, a top plate 46, a clamping groove 47, a ball 48, an elastic block 49, an arc-shaped guide groove 431 and a rotating assembly, wherein the fixed plate 4 is fixed on the side wall of the hollow shell and is provided with a mounting hole 40 matched with the air inlet; the dust guard 41 is a conventional metal dust guard which is uniformly provided with ventilation openings and can just slide relative to the inner wall of the mounting hole; the connecting plates 42 are symmetrically fixed on two sides of the dust guard; the sliding grooves 44 are symmetrically arranged on the inner wall of the mounting hole 40 and just can be used for the connecting plate to be clamped and slide; the limiting groove 43 is arranged on the inner wall of the mounting hole in a surrounding mode and communicated with the sliding groove; the first elastic piece 45 is a spring which is uniformly arranged in the limiting groove in a surrounding manner, and one end of the first elastic piece is fixed on the side wall of the limiting groove; the top plate 46 is fixed at the end of the first elastic element; the clamping groove 47 is formed in the side wall of the limiting groove, when the dust guard is installed, the connecting plate is aligned to the sliding groove, then the connecting plate is pressed into the bottom of the sliding groove, then the dust guard is rotated to enable the connecting plate to be connected into the limiting groove, when the connecting plate is aligned to the clamping groove, the first elastic piece pushes the top plate to extrude the connecting plate to enter the clamping groove, and therefore the dust guard is connected to the fixing plate, installation is convenient, and only the dust guard needs to be rotated to enable the connecting plate to be aligned to the sliding groove when the connecting plate is disassembled, and the; the balls 48 are conventional balls which are rotatably connected to the top and the bottom of the connecting plate, and when the connecting plate enters the limiting groove, the dust guard can be stopped being pressed, so that the dust guard can be driven conveniently; the elastic block 49 is made of elastic rubber and fixed on two sides of the clamping groove, and the elastic block is arranged to enable the dust guard to rotate under a certain action during the working process of the fan, so that sundries are prevented from being accumulated on the dust guard; the arc-shaped guide groove 431 is formed at the communication position of the limiting groove and the sliding groove; the connecting plate can enter the limiting groove from the sliding groove conveniently.

Preferably, the rotating assembly comprises a jack 55, a rotating rod 5, an inserting plate 51, a slot, a handle 52, a rubber plate 53 and a protrusion 54, wherein the jack 55 is arranged on the dust guard; the rotating rod 5 can be inserted into the jack; the slots are formed in the dust guard; the inserting plates 51 are fixed on two sides of the rotating rod and can be inserted into the slots; the handle 52 is in a cross shape and is fixed on the end part of the rotating rod; the rubber plate 53 is fixed on the handle; the protrusions 54 are spherical protrusions and are formed by upward protrusions of a rubber plate, so that the pressing comfort level is improved.

Claims

1. The utility model provides a dust protected centrifugal fan, includes motor (1), mount (2), cavity casing (3), locates impeller and dustproof mechanism in the cavity casing, its characterized in that: the hollow shell (3) is provided with an air inlet (31) and an air outlet (32), and the dustproof mechanism comprises a fixed plate (4) arranged at the air inlet (31), a dustproof plate (41) detachably arranged on the fixed plate (4) and a connecting device used for connecting the fixed plate and the dustproof plate.

2. The dustproof centrifugal fan of claim 1, wherein: connecting device is including locating mounting hole (40), symmetry on fixed plate (4) are located connecting plate (42) on dust guard (41), are located spacing groove (43) on mounting hole (40) inner wall, locate spout (44), locking Assembly and runner assembly on fixed plate (4), the mounting hole can supply the dust guard to get into, the spout can supply the connecting plate to slide, and spout and spacing groove intercommunication.

3. The dustproof centrifugal fan of claim 2, wherein: the locking assembly comprises a plurality of first elastic pieces (45) arranged in the limiting groove (43), a top plate (46) arranged on the end part of each first elastic piece (45) and a clamping groove (47) arranged on the side wall of the limiting groove, and the clamping grooves (47) can be used for the connecting plates (42) to enter.

4. The dustproof centrifugal fan of claim 2, wherein: the top surface and the bottom surface of the connecting plate (42) are both provided with balls (48).

5. The dustproof centrifugal fan of claim 2, wherein: the limiting groove (43) is provided with an arc-shaped guiding groove (431), and the arc-shaped guiding groove is arranged at the communication position of the limiting groove and the sliding groove.

6. The dustproof centrifugal fan according to claim 3, wherein: elastic blocks (49) are symmetrically arranged on two side walls of the clamping groove (47).

7. The dustproof centrifugal fan of claim 2, wherein: the runner assembly is including locating jack (55) on dust guard (41), with jack complex dwang (5), locating picture peg (51) on dwang (5) and locating slot on the dust guard, the slot can supply the picture peg to insert.

8. The dustproof centrifugal fan of claim 7, wherein: the end part of the rotating rod (5) is provided with a cross-shaped handle (52).

9. The dustproof centrifugal fan of claim 1, wherein: the fixing frame (2) is provided with a fixing hole (21).

10. The dustproof centrifugal fan of claim 8, wherein: the handle (52) is provided with a rubber plate (53), and a plurality of bulges (54) are uniformly arranged on the rubber plate (53).