CN209908820U

CN209908820U - Centrifugal blast air structure

Info

Publication number: CN209908820U
Application number: CN201920755067.4U
Authority: CN
Inventors: 张�杰
Original assignee: Foshan Shunde Jiechun Ceramic Products Co Ltd
Current assignee: Foshan Shunde Jiechun Ceramic Products Co Ltd
Priority date: 2019-05-24
Filing date: 2019-05-24
Publication date: 2020-01-07
Anticipated expiration: 2029-05-24

Abstract

The utility model discloses a centrifugal blast structure, which comprises an upper shell, a connecting plate, a lower shell, a motor body and a centrifugal wind wheel; the centrifugal wind wheel is arranged in the lower cavity and driven by a motor body arranged on the connecting plate, the lower shell and the upper shell are respectively provided with an air inlet and an air outlet, the air outlet direction of the air outlet is the same as the air inlet direction of the air inlet, and the connecting plate is provided with an air guide outlet; the air flow in the lower chamber enters the upper chamber through the air guide outlet under the centrifugal force action of the centrifugal wind wheel and is discharged through the air outlet; and the side wall of the lower shell is provided with an air guide groove, and the air guide groove is opposite to the air guide outlet. The separated type air blowing structure capable of axially supplying air is provided; the advantage of the centrifugal impeller type fan is utilized to enhance the air supply pressure in the use environment of vertical air supply.

Description

Centrifugal blast air structure

Technical Field

The utility model relates to a centrifugal blast air structure belongs to the fan field.

Background

Most of the conventional blowers are composed of a blower housing with a common blade, so that the common blade can rotate to suck a proper amount of air and make the air into an air flow to achieve the effect of delivering the air to a specific place for adjusting the indoor air quality. The centrifugal blower is a common device which adopts the rotation of a blade impeller to generate centrifugal force, so that conveyed gas media are pressurized, accelerated and conveyed outwards, and can be divided into an air blower, a flue gas blower, a coal gas blower and the like according to different conveyed media; because the flue gas temperature is high and contains a large amount of dust, a dust removal device is required to be additionally arranged in front of the air blower, the dust removal rate is over 85 percent, and the bearing box is required to be water-cooled. In addition, because tar and dust contained in the coal gas are easy to adhere to the impeller and the casing, so that the blower cannot normally operate, a tar removing device is required to be additionally arranged in front of the blower, and the blower is required to be periodically detached for coke removal or steam tar removal. The D110-12 type blower manufactured by the blower factory is taken as an example, the blower is specially used for pressurizing and conveying coal gas of a factory and mine gas station, the blower is directly driven by an asynchronous motor through a coupler, a rotor of the blower is in a cantilever shape, the rotation direction is clockwise, a working wheel with a riveting structure is arranged on the rotor, a high-quality carbon steel stamping groove-shaped blade is arranged on the wheel, the blade is in a back bending type, a blower shell is a common cast iron volute shell, two sides of the blower shell are fixed by shell cover plates, the air inlet direction is in a lateral direction, the air outlet direction is in a left 0-degree direction, a sealing device is arranged between a main shaft and the blower shell, and the whole blower shell and a pipeline are tight and air.

Theoretically, the pressure-flow characteristic curve of the centrifugal blower is a straight line, but because of the loss such as frictional resistance in the blower, the actual pressure-flow characteristic curve gradually decreases with the increase of the flow, and the corresponding power-flow characteristic curve of the centrifugal blower increases with the increase of the flow. When the fan is operated at a constant speed, the operating point of the fan will move along the pressure-flow characteristic curve. The operating point of the fan during operation not only depends on the performance of the fan, but also depends on the characteristics of the system, and when the resistance of the pipe network is increased, the performance curve of the pipeline becomes steep. The basic principle of fan regulation is to obtain the required working condition by changing the performance curve of the fan or the characteristic curve of an external pipe network.

The existing centrifugal blower structure generally adopts a lateral air outlet structure, the air outlet structure is not suitable for some axial air supply environments, the axial air supply is air inlet in the same air inlet direction as the air outlet direction, the existing axial air supply mode generally adopts a blade type fan structure, and the air pressure of the fan type is often lower than that of an impeller type.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in view of the above problems, a centrifugal blower structure is provided, which can supply air axially; the advantage of the centrifugal impeller type fan is utilized to enhance the air supply pressure in the use environment of vertical air supply.

The utility model adopts the technical scheme as follows:

the utility model discloses a centrifugal blast structure, which comprises an upper shell, a connecting plate, a lower shell, a motor body and a centrifugal wind wheel; the centrifugal wind wheel is arranged in the lower cavity and driven by a motor body arranged on the connecting plate, the lower shell and the upper shell are respectively provided with an air inlet and an air outlet, the air outlet direction of the air outlet is the same as the air inlet direction of the air inlet, and the connecting plate is provided with an air guide outlet; the air flow in the lower chamber enters the upper chamber through the air guide outlet under the centrifugal force action of the centrifugal wind wheel and is discharged through the air outlet; and the side wall of the lower shell is provided with an air guide groove, and the air guide groove is opposite to the air guide outlet.

Preferably, a plurality of air guiding pieces are arranged inside the air outlet.

Preferably, the air outlet is positioned above the air inlet; the air inlet direction of the air inlet is parallel to the axial direction of the centrifugal wind wheel.

Preferably, the upper shell is integrally formed by a die-casting process to form the air guide sheet and the air guide air port; the lower shell is integrally formed by adopting a die-casting process and forms an air inlet and an air guide groove.

Preferably, a plurality of screw coupling seats are provided on the outer sides of the upper case, the connecting plate, and the lower case, respectively, and the screw coupling seats of the upper case, the connecting plate, and the lower case are fixedly coupled to each other by screws.

Preferably, a motor mounting position is arranged in the middle of the connecting plate and is a groove in the middle of the connecting plate, and the motor body is fixedly mounted in cooperation with the motor mounting position.

Preferably, the motor body adopts a brushless direct current variable frequency motor, and a lead of the motor penetrates out through a lead penetrating hole arranged at the edge of the connecting plate.

Preferably, four support feet are provided on the lower side of the lower housing.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the fan of the utility model is convenient to disassemble, the upper shell, the lower shell and the connecting plate are connected together through screws and threaded connecting seats, and the threaded connecting seats correspond one to one, so that the fan can be conveniently disassembled;

2. the upper shell, the connecting plate and the lower shell are all manufactured by a die-casting process, so that the independence among the structures of the air blowing structure is stronger, and the strength of the connecting structure of the motor is enhanced;

3. the motor is connected with a control panel through a wire, and the control panel is used for controlling the supply current of the motor and realizing the control of the power of the blower;

4. the wind guide groove is additionally arranged, so that the wind pressure of the fan is increased, and the shape and the structure of the wind guide groove can be favorable for smooth transmission of airflow.

Drawings

FIG. 1 is a block diagram of a centrifugal blower structure prior to assembly;

FIG. 2 is a bottom oblique view of the upper housing;

fig. 3 is a diagonal bottom view of the lower case.

The labels in the figure are: 1-upper shell, 2-first threaded connection seat, 3-connecting plate, 4-second threaded connection seat, 5-wind guide outlet, 6-motor body, 7-centrifugal wind wheel, 8-lower shell, 9-wind guide groove, 10-wind inlet, 11-waist-shaped hole, 12-control panel, 13-motor installation position, 14-lead threading hole, 15-wind outlet, 16-wind guide sheet and 17-supporting foot.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

As shown in figure 1, the utility model discloses a centrifugal blast structure, its major structure includes casing 1, connecting plate 3, lower casing 8, motor body 6, centrifugal wind wheel 7. The connection plate 3 is connected between the upper case 1 and the lower case 8, and divides a space between the upper case 1 and the lower case 8 into an upper chamber and a lower chamber.

The upper shell 1 is integrally formed by a die-casting process, an air outlet 15 is formed at the top of the

upper shell

1, 5 air guide pieces 16 are arranged on the inner side of the air outlet 15, the air guide pieces 16 are arc-shaped, the air guide pieces 16 are used for guiding air flow in an upper chamber to the air outlet 15, and the air guide pieces 16 and the upper shell 1 are integrally formed by die-casting; the whole upper shell 1 is circular, the root of the air outlet 15 is in a stepped cone shape, and the air guide pieces 16 are evenly distributed at the conical structure, so that the air flow in the upper cavity can smoothly enter the air outlet 15. A plurality of thread connecting seats I2 are arranged at the outer side edge of the upper shell 1.

The connecting plate 3 is integrally formed by a die-casting process, a motor mounting position 13 for mounting and fixing the motor body 6 is formed in the middle of the connecting plate 3, the motor mounting position 13 is in a groove shape, a notch of the motor mounting position 13 faces downwards, the motor is inverted and then is inversely inserted into the motor mounting position 13, and then the motor body 6 is fixed into the motor mounting position 13 by some known conventional means, wherein the conventional means comprises a thread fixing mode or a buckling fixing mode and the like. In addition, a wire through hole 14 is provided on the side wall of the edge of the connection plate 3, the wire is passed out of the centrifugal blower structure through the wire through hole 14 to connect with a control panel 12, and the control panel 12 is used for controlling the supply current of the motor to control the power of the blower.

Still be provided with a plurality of threaded connection seat two 4 at the border of connecting plate 3, threaded connection seat two 4 and threaded connection seat 2 correspondence are the one-to-one, in addition, still are provided with wind-guiding export 5 at the border of connecting plate 3, and wind-guiding export 5 is used for the cavity and the lower chamber of UNICOM, guarantees the smooth circulation of air current.

The lower shell 8 is integrally formed by a die-casting process, the lower shell 8 is of a spiral structure, an air inlet 10 is formed in the middle of the lower shell 8, an air guide groove 9 is formed in the edge of the lower shell 8, and the air guide groove 9 is opposite to the air guide outlet 5 and used for guiding air in the lower cavity into the upper cavity. The outer side edge of the lower shell 8 is provided with a plurality of threaded connecting seats III, and the threaded connecting seats III correspond to the threaded connecting seats I2 one by one.

Four support feet are provided on the underside of the lower housing 8, which will be more stable than three support feet.

The assembling method of the air blowing structure in the structure comprises the following steps:

the motor body 6 is fixedly installed in a motor installation position 13 of the connecting plate 3, then the centrifugal wind wheel 7 is fixed on a rotating shaft of the motor body 6, then the connecting plate 3 is reversely buckled on the lower shell 8, at the moment, the air inlet 10 is opposite to the center of the centrifugal wind wheel 7, and meanwhile, the centrifugal wind wheel 7 is ensured to be in a suspended state, in addition, the air guide groove 9 is positioned on the radial outer side of the centrifugal wind wheel 7, and when the centrifugal wind wheel 7 is driven to rotate by the motor body 6, air flow can be pushed into the air guide groove 9 along the rotating direction of the centrifugal wind wheel 7; then with last casing 1 lock to connecting plate 3 on to guarantee even threaded connection seat one 2, threaded connection seat two 4, threaded connection seat three can the one-to-one, then through the screw with threaded connection seat one 2, threaded connection seat two 4, threaded connection seat three connection, make last casing 1, connecting plate 3, lower casing 8 can fixed connection. The motor adopts a brushless direct current variable frequency motor, wind is output from an air outlet 15 of the upper shell 1, the air outlet 15 can be sleeved with an exhaust pipe with different pipe diameters, an exhaust pipe with a pipe diameter of 50cm is sleeved with the exhaust pipe, or an exhaust pipe with a pipe diameter of 60cm is sleeved with the exhaust pipe, and the adaptability is strong.

When the centrifugal wind wheel is used, the centrifugal wind wheel 7 arranged in the lower cavity is driven to rotate by the motor body 6 on the mounting connecting plate 3, airflow enters the lower cavity from the air inlet 10, the airflow in the lower cavity enters the upper cavity through the air guide outlet 5 along the air guide groove 9 under the action of the rotating thrust of the centrifugal wind wheel 7, the airflow entering the upper cavity is guided into the air outlet 15 through the air guide sheet 16 and is output, and the air outlet 15 is positioned above the air inlet 10; the air inlet direction of the air inlet 10 is parallel to the axial direction of the centrifugal wind wheel 7, and the air inlet direction of the air inlet 10 is the same as the air outlet direction of the air outlet 15.

In the fan structure in the structure, the upper shell 1, the lower shell 8 and the connecting plate 3 are connected together through screws and the thread connecting seats, and the thread connecting seats I2 correspond to each other, so that the fan can be conveniently detached; the disassembly convenience of the fan is realized. In addition, the upper shell 1, the connecting plate 3 and the lower shell 8 are all manufactured by a die-casting process, so that the independence among the structures of the air blowing structure is stronger, and the strength of the connecting structure of the motor is enhanced.

And, because the inboard lateral wall of lower casing 8 becomes to be close to circularly, and wind-guiding groove 9 distributes in the tangential direction of inboard lateral wall to guaranteed under the condition that reduces the resistance, guaranteed that the air current can get into the upper chamber fast, made the wind pressure of fan increase, the shape and the structure of wind-guiding groove 9 can be favorable to the smooth transmission of air current. Additionally, the utility model discloses a fan air inlet direction is the same with the air-out direction, has realized that the axial pressure boost of air current flows, and compares in vane type axial fan, adopts centrifugal wind wheel 7's structure for the wind pressure increase of fan.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims

1. A centrifugal blast structure is characterized by comprising an upper shell (1), a connecting plate (3), a lower shell (8), a motor body (6) and a centrifugal wind wheel (7); the connecting plate (3) is connected between the upper shell (1) and the lower shell (8), the space between the upper shell (1) and the lower shell (8) is divided into an upper chamber and a lower chamber, the centrifugal wind wheel (7) is arranged in the lower chamber and driven by a motor body (6) arranged on the connecting plate (3), an air inlet (10) and an air outlet (15) are respectively arranged on the lower shell (8) and the upper shell (1), the air outlet direction of the air outlet (15) is the same as the air inlet direction of the air inlet (10), and an air guide outlet (5) is arranged on the connecting plate (3); the air flow in the lower chamber enters the upper chamber through the air guide outlet (5) under the centrifugal force action of the centrifugal wind wheel (7) and is discharged through the air outlet (15); and a wind guide groove (9) is formed in the side wall of the lower shell (8), and the wind guide groove (9) is opposite to the wind guide outlet (5).

2. The centrifugal blower structure according to claim 1, wherein a plurality of air guide fins (16) are provided inside the air outlet (15).

3. Centrifugal blower structure according to claim 2, characterised in that the air outlet (15) is located above the air inlet (10); the air inlet direction of the air inlet (10) is parallel to the axial direction of the centrifugal wind wheel (7).

4. The centrifugal blower structure according to claim 2, wherein the upper case (1) is integrally formed by a die-casting process and forms the air guide fins (16) and the air guide ports; the lower shell (8) is integrally formed by adopting a die-casting process and forms an air inlet (10) and an air guide groove (9).

5. The centrifugal blower structure according to claim 1, wherein a plurality of screw coupling seats are provided on the outer sides of the upper casing (1), the connection plate (3), and the lower casing (8), respectively, and the screw coupling seats of the upper casing (1), the connection plate (3), and the lower casing (8) are fixedly coupled by screws.

6. The centrifugal blower structure according to claim 1, wherein a motor mounting position (13) is provided in the middle of the connecting plate (3), the motor mounting position (13) is a groove in the middle of the connecting plate (3), and the motor body (6) is fixedly mounted in cooperation with the motor mounting position (13).

7. The centrifugal blower structure according to claim 1, wherein the motor body (6) is a brushless dc variable frequency motor, and the wires of the motor are passed out through wire passing holes (14) provided at the edge of the connection plate (3).

8. Centrifugal blower structure according to claim 1, characterised in that four supporting feet are provided on the underside of the lower casing (8).