CN213655169U

CN213655169U - Low-noise fan

Info

Publication number: CN213655169U
Application number: CN202022500684.5U
Authority: CN
Inventors: 叶友才; 钱小虎; 刘剑平; 刘庶; 黄秀芝
Original assignee: Guizhou Huitiancheng Safety Facilities Co ltd
Current assignee: Guizhou Huitiancheng Safety Facilities Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-07-09
Anticipated expiration: 2030-11-03

Abstract

The utility model relates to the field of fans, in particular to a low-noise fan, which comprises a volute, an impeller component which is connected in the volute through the rotation of a driving shaft, an air inlet component which is arranged at the front part of the volute and an air outlet which is arranged at the lower side of the right part of the volute, wherein a water cavity is arranged in the wall of the volute, a plurality of groups of semicircular grooves which protrude into the volute are uniformly arranged at the inner side of the circumference of the water cavity, and a plurality of groups of pipe type frames are uniformly arranged; the utility model discloses a set up the resistive nature silencer of piece formula, reduce the noise that wind produced when inhaling and discharging, and through setting up the resistive nature silencer of a plurality of groups tubular at the spiral case inside wall, further weaken wind power noise and mechanical noise, simultaneously through set up the water cavity in the spiral case conch wall, thereby make water absorb the spiral interior sound wave of casing and absorb the vibration that the device course produced, and turn into heat energy with sound wave and vibration, and then realize weakening the purpose of mechanical noise and wind power noise, reduce the noise pollution that the device produced.

Description

Low-noise fan

Technical Field

The utility model relates to a fan field, concretely relates to low noise fan.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. 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 furnaces, cooling and ventilation in air conditioning equipment and household electrical appliances, drying and sorting of grains, wind tunnel wind sources and inflation and propulsion of air cushion boats, and the like.

When the existing centrifugal fan operates, mechanical noise and wind power noise can be generated, so that certain noise pollution is caused.

SUMMERY OF THE UTILITY MODEL

Solves the technical problem

To the above-mentioned shortcoming that prior art exists, the utility model provides a low noise fan can solve prior art centrifugal fan effectively when the operation, can produce mechanical noise and wind power noise to cause certain noise pollution's problem.

Technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a low-noise fan comprises a volute, an impeller assembly rotationally connected in the volute through a driving shaft, an air inlet assembly arranged at the front part of the volute and an air outlet arranged at the lower side of the right part of the volute, a water cavity is arranged in the wall of the volute, a plurality of groups of semicircular grooves protruding into the volute are uniformly arranged on the inner side of the circumference of the water cavity, a plurality of groups of pipe-type frames are uniformly arranged on the inner side wall of the circumference of the volute, the pipe-type frames and the semicircular grooves are distributed at intervals, and a plurality of groups of through holes are uniformly arranged on the circumferential side wall of the tubular frame, tubular resistive silencers are arranged in the tubular frame, a radiating pipe communicated with the water cavity is vertically arranged at the upper part of the volute, the upper end of the radiating pipe is in threaded connection with a dustproof assembly, the air inlet assembly comprises a sealing ring arranged on the front side of the volute and a horn-shaped air inlet fixedly connected to the front side of the sealing ring, and a plurality of groups of sheet-type resistive mufflers are arranged in the horn-shaped air inlet and the air outlet.

Furthermore, a sealing groove matched with the sealing ring is formed in the front side of the volute, so that the sealing performance between the sealing ring and the volute is improved.

Furthermore, the impeller assembly comprises an impeller frame and blades which are uniformly arranged at the eccentric part of the front side of the impeller frame, a plurality of groups of wind holes are formed in the blades, and a plurality of groups of wind holes are formed in the blades, so that when the blades rotate, the blades rub with air, wind power noise is absorbed and converted into heat to be discharged, and the noise of the device during working can be reduced.

Furthermore, the middle part of the front side of the radiating pipe is provided with an oblong observation window, and the water level in the radiating pipe can be conveniently observed through the oblong observation window.

Still further, the dustproof assembly comprises a threaded pipe which is in threaded connection with the upper end of the radiating pipe, a cross frame which is arranged in the top end of the threaded pipe, and a conical dustproof cover which is fixedly connected to the top side of the cross frame through a support rod, and the conical dustproof cover is used for reducing dust falling into the radiating pipe.

Advantageous effects

Adopt the utility model provides a technical scheme compares with known public technique, has following beneficial effect:

the utility model discloses a set up the resistive nature silencer of piece formula in horn type air intake and air outlet, reduce the wind and inhale the noise that produces when discharging, weaken wind power noise promptly, and through setting up the resistive nature silencer of a plurality of groups tubular at the spiral case inside wall, further weaken wind power noise and mechanical noise, set up the water cavity in the spiral case conch wall simultaneously, thereby make the sound wave in the water absorption spiral case and absorb the vibration that the device course produced, and turn into heat energy with sound wave and vibration, and then realize weakening the purpose of mechanical noise and wind power noise, reduce the noise pollution that the device produced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural view of a front side viewing angle of the present invention;

fig. 2 is a structural schematic diagram of a rear side viewing angle of the present invention;

fig. 3 is a schematic cross-sectional structure of the present invention;

FIG. 4 is a schematic view of the volute and the air outlet of the present invention;

fig. 5 is a schematic structural view of the impeller assembly of the present invention;

FIG. 6 is a schematic view of the air intake assembly of the present invention;

fig. 7 is a schematic view of the dustproof assembly of the present invention in a bottom side view;

the reference numerals in the drawings denote: 1-a volute; 2-a drive shaft; 3, air outlet; 4-a water cavity; 5-semicircle; 6-a tubular frame; 7-tubular resistive mufflers; 8-radiating pipes; 9-sealing ring; 10-horn-shaped air inlet; 11-a sheet resistive muffler; 12-sealing the groove; 13-an impeller frame; 14-a blade; 15-air holes; 16-oblong viewing window; 17-a threaded pipe; 18-a cross; 19-conical dust cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. 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.

The present invention will be further described with reference to the following examples.

Examples

A low noise fan of this embodiment, refer to fig. 1-7: comprises a volute 1, an impeller component rotationally connected in the volute 1 through a driving shaft 2, an air inlet component arranged at the front part of the volute 1 and an air outlet 3 arranged at the lower side of the right part of the volute 1, wherein a water cavity 4 is arranged in the wall of the volute 1, a plurality of groups of semicircular grooves 5 protruding into the volute 1 are uniformly arranged at the inner side of the circumference of the water cavity 4, a plurality of groups of tubular frames 6 are uniformly arranged on the inner side wall of the circumference of the volute 1, the tubular frames 6 and the semicircular grooves 5 are distributed at intervals, and a plurality of groups of through holes have evenly been seted up to 6 circumference lateral walls of tubular frame, the resistive silencer of tubular 7 has all been placed in

tubular frame

6, 1 upper portion of spiral case is provided with perpendicularly with the communicating cooling tube 8 in

water cavity

4, 8 upper end threaded connection of cooling tube have dustproof subassembly, the air inlet subassembly is including installing sealing washer 9 and the loudspeaker type air intake 10 of fixed connection in the sealing washer 9 front side at 1 front side of spiral case, all be provided with a plurality of groups of piece formula resistive silencers 11 in loudspeaker type air intake 10 and the air outlet 3.

Wherein, the front side of the volute 1 is provided with a sealing groove 12 matched with the sealing ring 9, thereby improving the sealing performance between the sealing ring 9 and the volute 1.

Wherein, impeller subassembly includes impeller frame 13 and evenly sets up the blade 14 at impeller frame 13 front side eccentric portion, has all seted up a plurality of groups wind hole 15 on the blade 14, has seted up a plurality of groups wind hole 15 on through the blade 14 to when blade 14 rotates, with air friction, with wind power noise absorption and change the heat discharge, and then can reduce the noise of the device during operation.

Wherein, the middle part of the front side of the radiating pipe 8 is provided with an oblong observation window 16, and the water level in the radiating pipe 8 can be conveniently observed through the oblong observation window 16.

Wherein, dustproof subassembly includes threaded connection at the screwed pipe 17 of cooling tube 8 upper end, set up the cross 18 in the screwed pipe 17 top and through branch fixed connection at the toper dust cover 19 of cross 18 top side, through toper dust cover 19 to reduce the dust and fall into in the cooling tube 8.

The principle is as follows: the other end of a driving shaft 2 of the device can be directly and fixedly connected with an output shaft of a driving motor, or can be in transmission fit with the driving motor through a transmission mode of a belt wheel and a belt, so that the rotation of the driving shaft 2 is realized, an impeller assembly is driven to rotate at a high speed in a volute 1, further, outside air is sucked into the volute 1 from a horn-shaped air inlet 10 and is discharged from an air outlet 3, a sheet type resistive silencer 11 is arranged in the horn-shaped air inlet 10 and the air outlet 3, sound waves are transmitted in a porous sound absorbing material structure by utilizing a porous sound absorbing material in the resistive silencer, sound energy is converted into heat energy due to friction and is dissipated, the purpose of silencing is achieved, and therefore noise generated when wind is sucked and discharged is reduced, namely wind power noise is; meanwhile, the tubular resistive muffler 7 is arranged in the tubular frame 6, so that sound waves generated by wind in the volute 1 and generated by the rotation of the impeller assembly enter the porous sound-absorbing material in the tubular resistive muffler 7 through the through hole, and wind power noise and mechanical noise are further weakened; the water cavity 4 is arranged in the volute 1, water is filled in the water cavity 4, the water level is enabled to be in the upper portion of the radiating pipe 8, the contact area between the inner side wall of the volute 1 and sound waves in the volute 1 is increased through the arrangement of the semicircular groove 5, so that the water in the water cavity 4 absorbs the sound waves generated by wind in the volute 1 and the sound waves generated when the impeller assembly rotates, simultaneously absorbs vibration generated in the working process of the device and converts the sound waves and the vibration into heat energy, the water in the water cavity 4 is heated, and then the water is discharged from the top of the radiating pipe 8 in a water vapor mode, and mechanical noise and wind power noise are weakened; when the water level is lower than the upper part of the radiating pipe 8, the dustproof assembly can be taken down from the radiating pipe 8, and then water is injected into the radiating pipe 8; meanwhile, the sealing ring 9 can be detached from the front end of the volute 1, so that the pipe-replacing type resistive muffler 7 is convenient to replace.

The device is through setting up the resistive silencer of piece formula 11 in horn type air intake 10 and air outlet 3, reduce the noise that wind produced when inhaling with the discharge, weaken wind-force noise promptly, and through set up the resistive silencer 7 of a plurality of group's tubular at spiral case 1 inside wall, further weaken wind-force noise and mechanical noise, simultaneously through setting up water cavity 4 in the spiral case 1 conch wall, thereby make the sound wave in the water absorption spiral case 1 and absorb the vibration that the device working process produced, and turn into heat energy with sound wave and vibration, and then realize weakening the purpose of mechanical noise and wind-force noise, reduce the noise pollution that the device produced.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; 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 technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a low noise fan, includes spiral case (1), rotates the impeller subassembly of connection in spiral case (1), sets up at the anterior air inlet subassembly of spiral case (1) and sets up air outlet (3) in spiral case (1) right part downside through drive shaft (2), its characterized in that: a water cavity (4) is arranged in the wall of the volute (1), a plurality of groups of semicircular grooves (5) protruding into the volute (1) are uniformly arranged on the inner side of the circumference of the water cavity (4), a plurality of groups of tubular frames (6) are uniformly arranged on the inner side wall of the circumference of the volute (1), the tubular frames (6) and the semicircular grooves (5) are distributed at intervals, a plurality of groups of through holes are uniformly arranged on the circumferential side wall of the tubular frame (6), tubular resistive silencers (7) are arranged in the tubular frame (6), a radiating pipe (8) communicated with the water cavity (4) is vertically arranged at the upper part of the volute (1), the upper end of the radiating pipe (8) is in threaded connection with a dustproof assembly, the air inlet assembly comprises a sealing ring (9) arranged on the front side of the volute (1) and a horn-shaped air inlet (10) fixedly connected to the front side of the sealing ring (9), and a plurality of group sheet type resistive mufflers (11) are arranged in the horn-shaped air inlet (10) and the air outlet (3).

2. A low noise blower according to claim 1, wherein the front side of the volute (1) is provided with a sealing groove (12) matched with the sealing ring (9).

3. The low-noise fan according to claim 1, wherein the impeller assembly comprises an impeller frame (13) and blades (14) uniformly arranged at an eccentric part of the front side of the impeller frame (13), and a plurality of groups of air holes (15) are formed in each blade (14).

4. A low noise blower according to claim 1, wherein the radiating pipe (8) is provided with an oblong viewing window (16) in the middle of the front side thereof.

5. A low noise blower according to claim 1, wherein said dust-proof assembly comprises a screw pipe (17) screw-coupled to the upper end of the radiating pipe (8), a cross (18) provided in the top end of the screw pipe (17), and a tapered dust cover (19) fixedly coupled to the top side of the cross (18) by means of a stay.