CN213450913U

CN213450913U - Prevent inside air backflow's centrifugal fan

Info

Publication number: CN213450913U
Application number: CN202021475797.8U
Authority: CN
Inventors: 王明星
Original assignee: Yancheng Star Fan Manufacturing Co ltd
Current assignee: Yancheng Star Fan Manufacturing Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-06-15
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a prevent inside air reflux's centrifugal fan, including backup pad and drive mechanism, the outside upper end of backup pad is provided with the frame, and the opposite side of frame is provided with the backing plate, the outside both sides of backing plate are provided with the crew cut bolt, and the outside of backing plate is provided with the motor, the middle-end inner wall of frame is provided with the draw-in groove, and the outer wall block of draw-in groove has the deflector, the one end outside of induced draft mechanism is provided with the sealing ring, and the middle part of sealing ring is provided with the induced draft mouth. This prevent inside air backward flow's centrifugal fan is provided with the motor, motor one end external connection has drive mechanism, and the outside both sides of fixed block are provided with the locating pin, and the electric power that the motor provided drives motor shaft and rotates, and then the epaxial main band pulley of motor shaft drives the belt and transmits, and the secondary pulley that the belt opposite side is connected drives the axis of rotation afterwards and rotates, and the axis of rotation drives the fan blade at last and rotates and carry out induced air work.

Description

Prevent inside air backflow's centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field specifically is a prevent centrifugal fan of inside air backward flow.

Background

The centrifugal fan for preventing the internal air from flowing back mainly enters the air outlet from the induced air port through the air extracted by the induced air mechanism, and the air in the frame is prevented from flowing back because the sealing ring is arranged on the other side of the induced air mechanism to isolate the air in the frame from being diffused out from the induced air port.

In the use of the centrifugal fan on the market, an air inlet of the centrifugal fan is a negative pressure low pressure area, an air outlet of the centrifugal fan is a positive pressure high pressure area, air flow of the high pressure area easily flows into the low pressure area according to the property of fluid, so that part of the air flow discharged from an air outlet flows back to the air inlet to form backflow, internal leakage loss is caused, and the working efficiency of the centrifugal fan is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent centrifugal fan of inside air backward flow to solve the air inlet department of the centrifugal fan who provides among the above-mentioned background art for negative pressure low-pressure area, centrifugal fan's exhaust port department is positive pressure high-pressure area, flows into the low-pressure area easily according to the air current of fluidic nature high-pressure area, so the air inlet can be flowed back to and form the backward flow to some of gas vent combustion gas, thereby causes interior leakage loss, has reduced centrifugal fan's work efficiency's problem.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a prevent centrifugal fan of inside air backward flow, includes backup pad and drive mechanism, the outside upper end of backup pad is provided with the frame, and the opposite side of frame is provided with the backing plate, the outside both sides of backing plate are provided with the crew cut bolt, and the outside of backing plate is provided with the motor, the one end external connection of motor has drive mechanism, the middle-end inner wall of frame is provided with the draw-in groove, and the outer wall block of draw-in groove has the deflector, the middle part of deflector is provided with induced air mechanism, the top outside of frame is provided with the air outlet, the one end outside of induced air mechanism is provided with the sealing ring, and the middle part of sealing ring.

Preferably, the support plate and the frame form a welded integral structure, and the support plate and the frame are attached to each other.

Preferably, the supporting plate and the motor form a detachable structure through a flat head bolt, and the supporting plate and the motor are horizontally distributed.

Preferably, drive mechanism is including protecting frame, primary pulley, motor shaft, belt, fixed block, locating pin and auxiliary pulley, inside one side of protecting frame is provided with the primary pulley, and the internal connection of primary pulley has motor shaft, the external connection of primary pulley has the belt, and the other end of belt is connected with the auxiliary pulley, the outside both sides that outside one side of protecting frame was provided with fixed block and fixed block are provided with the locating pin.

Preferably, the frame forms a clamping structure through the clamping groove and the guide plate, and the inner wall of the frame is tightly attached to the outer wall of the guide plate.

Preferably, the induced draft mechanism includes fan frame, axis of rotation, hexagonal bolt and fan blade, the inside of fan frame is provided with the axis of rotation, and the one end outside of axis of rotation is provided with hexagonal bolt, the outside of axis of rotation is provided with the fan blade.

Compared with the prior art, the beneficial effects of the utility model are that: this prevent inside air backward flow's centrifugal fan is provided with the motor, motor one end external connection has drive mechanism, and the outside both sides of fixed block are provided with the locating pin, and the electric power that the motor provided drives motor shaft and rotates, and then the epaxial main band pulley of motor shaft drives the belt and transmits, and the secondary pulley that the belt opposite side is connected drives the axis of rotation afterwards and rotates, and the axis of rotation drives the fan blade at last and rotates and carry out induced air work.

The frame passes through the draw-in groove and constitutes the block structure with the deflector, at first the user can install or dismantle the deflector from the frame through the draw-in groove, because closely laminate between the inner wall of frame and the deflector outer wall, increased area of contact between the two and reduced the clearance between the two, and then make the firm block of deflector in the draw-in groove, the existence of deflector plays certain guide effect to the convulsions work of fan blade, the wind-force of avoiding the fan blade to produce disperses, lead to the convulsions work efficiency of fan blade low.

The middle part of deflector is provided with induced draft mechanism, the inside of fan frame is provided with the axis of rotation, and the one end outside of axis of rotation is provided with hexagonal bolt, the outside of axis of rotation is provided with the fan blade, and the axis of rotation in the induced draft mechanism drives the fan blade and makes the axial rotation and then produce wind-force along with drive mechanism's transmission, plays the convulsions effect to the air of external environment, and the air that the induced draft mechanism extracted enters into air outlet department from the induced draft, and because the opposite side of induced draft mechanism is provided with the air that the sealing ring has completely cut off inside and has spread away from the induced draft, has avoided the inside air of frame the backward flow condition.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a schematic view of the transmission mechanism of the present invention;

fig. 3 is a schematic view of the structure of the air inducing mechanism of the present invention;

fig. 4 is a rear view structure diagram of the air inducing mechanism of the present invention.

In the figure: 1. a support plate; 2. a frame; 3. a base plate; 4. a flat head bolt; 5. a motor; 6. a transmission mechanism; 601. a protective frame; 602. a primary pulley; 603. a motor shaft; 604. a belt; 605. a fixed block; 606. positioning pins; 607. a secondary pulley; 7. a card slot; 8. a guide plate; 9. an air outlet; 10. an air inducing mechanism; 1001. a fan frame; 1002. a rotating shaft; 1003. a hexagonal bolt; 1004. a fan blade; 11. a seal ring; 12. and an air inducing port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a centrifugal fan for preventing internal air from flowing back comprises a supporting plate 1, a frame 2, a base plate 3, flat-head bolts 4, a motor 5, a transmission mechanism 6, a protective frame 601, a main belt wheel 602, a motor rotating shaft 603, a belt 604, a fixed block 605, a positioning pin 606, a secondary belt wheel 607, a clamping groove 7, a guide plate 8, an air outlet 9, an air inducing mechanism 10, a fan frame 1001, a rotating shaft 1002, a hexagonal bolt 1003, a fan blade 1004, a sealing ring 11 and an air inducing opening 12, wherein the frame 2 is arranged at the upper end of the outer part of the supporting plate 1, the base plate 3 is arranged at the other side of the frame 2, the flat-head bolts 4 are arranged at the two sides of the outer part of the base plate 3, the motor 5 is arranged at the outer part of the base plate 3, the transmission mechanism 6 is connected to the outer part of one end of the motor 5, the clamping groove 7 is, an air outlet 9 is arranged on the outer side of the top of the frame 2, a sealing ring 11 is arranged on the outer portion of one end of the air inducing mechanism 10, and an air inducing port 12 is arranged in the middle of the sealing ring 11.

The utility model has the advantages that: the support plate 1 and the frame 2 form a welded integral structure, the support plate 1 and the frame 2 are attached to each other, the support plate 1 and the frame 2 are used as fixed bearing parts of the whole centrifugal fan, and the support plate 1 and the frame 2 are welded to each other, so that the centrifugal fan has extremely high stability and bearing capacity, the vibration condition is avoided when the centrifugal fan works, and the normal operation of the centrifugal fan is guaranteed;

the supporting plate 1 and the motor 5 form a detachable structure through the flat-head bolt 4, and the supporting plate 1 and the motor 5 are horizontally distributed, so that the transportation and installation volume of the whole device is reduced, the motor 5 has a recycling function by detaching the motor 5, the utilization rate of the motor 5 is improved, when a fault occurs in the device, the motor 5 is detached, the fault part can be conveniently maintained or replaced, and the maintenance time of a user is saved;

the transmission mechanism 6 comprises a protective frame 601, a main belt wheel 602, a motor rotating shaft 603, a belt 604, a fixed block 605, a positioning pin 606 and an auxiliary belt wheel 607, the main belt wheel 602 is arranged on one side inside the protective frame 601, the motor rotating shaft 603 is connected inside the main belt wheel 602, the belt 604 is connected outside the main belt wheel 602, the auxiliary belt wheel 607 is connected to the other end of the belt 604, the fixed block 605 is arranged on one side outside the protective frame 601, the positioning pins 606 are arranged on two sides outside the fixed block 605, the motor rotating shaft 603 is driven to rotate by the electric power provided by the motor 5, the main belt wheel 602 on the motor rotating shaft 603 drives the belt 604 to transmit, the auxiliary belt wheel 607 connected to the other side of the belt 604 drives the rotating shaft 1002 to rotate, and finally the rotating shaft 1002 drives the fan blades 1004;

the frame 2 and the guide plate 8 form a clamping structure through the clamping groove 7, and the inner wall of the frame 2 and the outer wall of the guide plate 8 are tightly attached; firstly, a user can install or detach the guide plate 8 from the frame 2 through the clamping groove 7, because the inner wall of the frame 2 is tightly attached to the outer wall of the guide plate 8, the contact area between the inner wall and the outer wall of the frame 2 is increased, the gap between the inner wall and the outer wall is reduced, and the guide plate 8 is firmly clamped in the clamping groove 7, the guide plate 8 plays a certain role in guiding the air draft work of the fan blades 1004, and the low air draft work efficiency of the fan blades 1004 caused by the dispersion of wind power generated by the fan blades 1004 is avoided;

the induced draft mechanism 10 comprises a fan frame 1001, a rotating shaft 1002, a hexagonal bolt 1003 and a fan blade 1004, the rotating shaft 1002 is arranged inside the fan frame 1001, the hexagonal bolt 1003 is arranged outside one end of the rotating shaft 1002, the fan blade 1004 is arranged outside the rotating shaft 1002, the rotating shaft 1002 on the induced draft mechanism 10 drives the fan blade 1004 to rotate around the shaft along with the transmission of the transmission mechanism 6 to generate wind power, the induced draft effect is achieved on the air of the external environment, the air extracted by the induced draft mechanism 10 enters the air outlet 9 from the induced draft opening 12, and the air inside the induced draft mechanism 10 is isolated from the air diffused from the induced draft opening 12 by the sealing ring 11 arranged on the other side of the induced draft mechanism 10, so that the backflow of the air inside the frame 2 is avoided.

The working principle is as follows: for the centrifugal fan for preventing the internal air from flowing back, firstly, the motor 5 operates to drive the main belt wheel 602 on the motor rotating shaft 603 to rotate, then the belt 604 on the main belt wheel 602 drives, further, the secondary belt wheel 607 on the other side of the belt 604 drives the fan blade 1004 on the rotating shaft 1002 to rotate, then the fan blade 1004 rotates to generate wind power to extract the surrounding air, finally, the air inducing mechanism 10 guides and discharges the air, the air extracted by the air inducing mechanism 10 enters the air outlet 9 from the air inducing opening 12, and because the sealing ring 11 is arranged on the other side of the air inducing mechanism 10 to isolate the internal air from being diffused from the air inducing opening 12, the air in the frame 2 is prevented from flowing back, because the guide plate 8 is arranged on the inner wall of the frame 2, the guide plate 8 plays a certain role of guiding the air inducing work of the fan blade 1004, and the wind power generated by the fan blade 1004 is, the whole using process of the centrifugal fan for preventing the internal air from flowing back is completed in such a way that the air draft working efficiency of the fan blades 1004 is low.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent inside air backward flow's centrifugal fan, includes backup pad (1) and drive mechanism (6), its characterized in that: the air-conditioning device is characterized in that a frame (2) is arranged at the upper end of the outer portion of the supporting plate (1), a base plate (3) is arranged on the other side of the frame (2), flat-head bolts (4) are arranged on two sides of the outer portion of the base plate (3), a motor (5) is arranged on the outer portion of the base plate (3), a transmission mechanism (6) is connected to the outer portion of one end of the motor (5), a clamping groove (7) is formed in the inner wall of the middle end of the frame (2), a guide plate (8) is clamped on the outer wall of the clamping groove (7), an air inducing mechanism (10) is arranged in the middle of the guide plate (8), an air outlet (9) is formed in the outer side of the top of the frame (2), a sealing ring (11) is arranged on.

2. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein: the support plate (1) and the frame (2) form a welding integrated structure, and the support plate (1) and the frame (2) are attached to each other.

3. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein: the support plate (1) and the motor (5) form a detachable structure through the flat head bolt (4), and the support plate (1) and the motor (5) are horizontally distributed.

4. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein: the transmission mechanism (6) comprises a protective frame (601), a main belt wheel (602), a motor rotating shaft (603), a belt (604), a fixed block (605), a positioning pin (606) and an auxiliary belt wheel (607), wherein the main belt wheel (602) is arranged on one side inside the protective frame (601), the motor rotating shaft (603) is connected inside the main belt wheel (602), the belt (604) is connected outside the main belt wheel (602), the auxiliary belt wheel (607) is connected to the other end of the belt (604), the fixed block (605) is arranged on one side outside the protective frame (601), and the positioning pin (606) is arranged on two sides outside the fixed block (605).

5. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein: the frame (2) and the guide plate (8) form a clamping structure through the clamping groove (7), and the inner wall of the frame (2) and the outer wall of the guide plate (8) are tightly attached.

6. The centrifugal fan for preventing backflow of internal air according to claim 1, wherein: the induced draft mechanism (10) comprises a fan frame (1001), a rotating shaft (1002), a hexagonal bolt (1003) and a fan blade (1004), wherein the rotating shaft (1002) is arranged inside the fan frame (1001), the hexagonal bolt (1003) is arranged outside one end of the rotating shaft (1002), and the fan blade (1004) is arranged outside the rotating shaft (1002).