CN213088301U

CN213088301U - Host amplification structure suitable for disrotatory local fan

Info

Publication number: CN213088301U
Application number: CN202021962700.6U
Authority: CN
Inventors: 张和义
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-10
Filing date: 2020-09-10
Publication date: 2021-04-30
Anticipated expiration: 2030-09-10

Abstract

The utility model belongs to the technical field of fan noise reduction, and provides a host machine amplification structure suitable for a disrotatory local ventilator, which effectively enlarges the diameter of the air passing through the shell under the premise of ensuring the clearance between an impeller and a cylinder body, thereby realizing noise reduction; the technical scheme is as follows: the utility model provides a host computer enlarged structure suitable for disrotatory auxiliary ventilating fan, includes casing, motor, little barrel and impeller, and motor fixed mounting is inside the casing, and little barrel is fixed in the one end of casing and little barrel is unanimous with the casing internal diameter, inside the output shaft of motor stretched into little barrel, impeller mounting is on the output shaft of motor, and inside the impeller was located little barrel, little barrel internal fixation cover is equipped with the reducing ring, the reducing ring is the integrated into one piece structure of anterior straight tube and rear portion flaring loudspeaker, and the front end of reducing ring is equipped with the flange, and the reducing ring passes through flange and little barrel front end fixed connection, and the rear end of reducing ring is pitch arc transition formation flaring horn structure to little barrel rear end inner wall.

Description

Host amplification structure suitable for disrotatory local fan

Technical Field

The utility model relates to a host computer enlargies structure suitable for disrotatory auxiliary ventilating fan belongs to the technical field that the fan was fallen and is fallen the noise, concretely relates to mining auxiliary ventilating fan's host computer structural design.

Background

The mine ventilation system is an important component of mine mining and is a basic guarantee for mine safety production, and a mine local ventilator (hereinafter referred to as a local fan) is used for continuously conveying fresh air to an underground working face during the mine production process, supplying people with breath, diluting and removing various underground toxic and harmful gases and mine dust, creating a good working environment and guaranteeing the physical health and safety of underground operators.

The local fans used in domestic production at present mainly comprise FBD, FB and other series, and motors of the fans adopt secondary explosion-proof motors, so that the motor rotating speed is high, and the pneumatic noise is large; particularly, in the FBD series, two stages of impellers are guide vanes which are mutually, so that very high pressure is formed, meanwhile, the noise is also increased by geometric times, and due to the limitation of the diameter of a main machine shell, the flow velocity of airflow passing through the main machine shell is very high, so that the system resistance is increased, and the secondary noise is enhanced; in view of this, motor manufacturers also make non-standard designs for motors, but the improvement is still not big.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: the utility model provides a host computer enlargies structure suitable for disrotatory auxiliary ventilating fan, under the prerequisite of guaranteeing impeller and barrel clearance, effectively enlarges the wind diameter of crossing of casing to the realization is fallen and is made an uproar.

In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a host computer enlarged structure suitable for disrotatory auxiliary ventilating fan, includes casing, motor, little barrel and impeller, and motor fixed mounting is inside the casing, and little barrel is fixed in the one end of casing and little barrel is unanimous with the casing internal diameter, inside the output shaft of motor stretched into little barrel, impeller mounting is on the output shaft of motor, and inside the impeller was located little barrel, little barrel internal fixation cover is equipped with the reducing ring, the reducing ring is the integrated into one piece structure of anterior straight tube and rear portion flaring loudspeaker, and the front end of reducing ring is equipped with the flange, and the reducing ring passes through flange and little barrel front end fixed connection, and the rear end of reducing ring is pitch arc transition formation flaring horn structure to little barrel rear end inner wall.

And an anechoic layer is filled between the reducing ring and the small cylinder body.

The material of the noise reduction layer is glass silk floss.

And a sound insulation layer is adhered to the outer wall of the reducing ring.

The sound insulation layer is made of epoxy resin and glass fiber cloth.

The rear flaring horn of the reducing ring is formed by spinning.

Compared with the prior art, the utility model following beneficial effect has: through increasing the reducing ring in the little barrel at impeller place to form the horn mouth structure at reducing ring rear end and pass through, thereby under the prerequisite in assurance impeller and barrel clearance, cross dryer body diameter in the amplifier casing, make the wind speed reduce, reduced the resistance of system effectively, on the basis of making an uproar is fallen in the assurance, satisfy the demand of ore deposit side to pressure.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings;

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the middle reducing ring of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 2;

in the figure: the device comprises a shell 1, a motor 2, a small cylinder 3, a reducing ring 4, an impeller 5, a flange 6, a sound insulation layer 7 and a sound attenuation layer 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1-3, the utility model relates to a host computer enlarged structure suitable for disrotatory auxiliary ventilating fan, including casing 1, motor 2, little barrel 3 and impeller 5, motor 2 fixed mounting is inside casing 1, and little barrel 3 is fixed and is unanimous with 1 internal diameter of casing in the one end of casing 1 and little barrel 3, inside the output shaft of motor 2 stretched into little barrel 3, impeller 5 installs on motor 2's output shaft, and impeller 5 is located little barrel 3 inside, the fixed cover is equipped with reducing ring 4 in little barrel 3, reducing ring 4 is the integrated into one piece structure of anterior straight plate section of thick bamboo and rear portion flaring loudspeaker, and the front end of reducing ring 4 is equipped with flange 6, and reducing ring 4 passes through

flange

6 and 3 front end fixed connections of little barrel, and the rear end of reducing ring 4 is the pitch arc transition to little barrel 3 rear end inner walls and forms the flaring horn structure.

And a sound attenuation layer 8 is filled between the reducing ring 4 and the small cylinder 3.

The material of the sound attenuation layer 8 is glass silk floss.

And a sound insulation layer 7 is adhered to the outer wall of the reducing ring 4.

The sound insulation layer 7 is made of epoxy resin and glass fiber cloth.

The rear flaring horn of the reducing ring 4 is formed by spinning.

When the ventilation blower design, because the clearance of impeller and fan shells inner wall can not be too big, consequently the inside air diameter of crossing of whole fan is very limited, and it is little to cross the air diameter, and the air current velocity of flow is too high, the noise that forms just also big more, the utility model discloses to the too high problem of air current velocity of flow in the mainframe shell, improve the casing, set up reducing ring 4 on the 3 inner walls of little barrel of impeller 5 department, its internal diameter matches with the impeller, the prerequisite in 5 surplus inner wall clearances of impeller has been guaranteed, the host computer diameter has also been enlarged simultaneously, when the air current flows through reducing ring 4 rear portions, the flaring horn structure at its rear portion can make wind to smooth transition, casing 1 is because the national wind diameter grow, and the air current velocity of flow reduces to the realization is fallen and makes an uproar, and reducing ring 4 still can.

The local fan is used for local ventilation in a mine, on the basis of meeting the flow, the requirement on pressure is higher, and in the current stage, due to the requirement of environmental protection, a complex noise reduction means is added, so that not only is a system flow channel lengthened, but also the direction of air flow is changed, so that the system resistance is further increased, and the problem of insufficient air supply distance of the fan is caused. The utility model discloses an enlarge the design of diameter and reducing ring 4, form the horn mouth structure at the 4 rear ends of reducing ring at impeller 5 place, realize the steady transition of wind direction, reduced the wind speed, reduced the resistance of system effectively, on the basis of making an uproar is fallen in the assurance, satisfy the demand of ore deposit side to pressure. When noise reduction becomes a first requirement, the ultra-silent fan can be manufactured by applying the technology of noise reduction at a sound source, oblique air inlets and the like.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a host computer enlarged structure suitable for disrotatory auxiliary ventilating fan, includes casing (1), motor (2), little barrel (3) and impeller (5), and motor (2) fixed mounting is inside casing (1), and little barrel (3) are fixed in the one end of casing (1) and little barrel (3) are unanimous with casing (1) internal diameter, the output shaft of motor (2) stretches into inside little barrel (3), install on the output shaft of motor (2) impeller (5), and inside impeller (5) are located little barrel (3), its characterized in that: the fixed cover is equipped with reducing ring (4) in little barrel (3), reducing ring (4) are the integrated into one piece structure of anterior straight plate section of thick bamboo and rear portion flaring loudspeaker, and the front end of reducing ring (4) is equipped with flange (6), and reducing ring (4) are through flange (6) and little barrel (3) front end fixed connection, and the rear end of reducing ring (4) is pitch arc transition formation flaring loudspeaker structure of buckling to little barrel (3) rear end inner wall.

2. A main unit amplifying structure for a contra-rotating local fan according to claim 1, wherein: and a sound attenuation layer (8) is filled between the reducing ring (4) and the small cylinder body (3).

3. A main unit amplifying structure for a contra-rotating local fan according to claim 2, wherein: the material of the sound attenuation layer (8) is glass silk floss.

4. A main unit amplifying structure for a contra-rotating local fan according to claim 1, wherein: and a sound insulation layer (7) is adhered to the outer wall of the reducing ring (4).

5. A main unit amplifying structure for a contra-rotating local fan according to claim 1, wherein: the rear flaring horn of the reducing ring (4) is formed by spinning.