CN209083614U - Environmentally friendly denoising draught fan - Google Patents

Abstract

A kind of environmental protection denoising draught fan, including Blower Housing, the Blower Housing is equipped with air inlet and air outlet, an impeller is provided in the Blower Housing, the rear end of the Blower Housing is equipped with motor, the output axis connection of the impeller and motor, collector is equipped in Blower Housing, the collector is arranged before the impeller, the Blower Housing is spiral case, the air outlet of the Blower Housing extends to volute tongue side to be expanded, so that the relationship between the radius r of the circular arc of the bottom end of the volute tongue of the Blower Housing and the radius R2 of impeller is r=0.07~0.09R2, the circumferential arrangement of blade on the impeller along impeller, the angle α between the same consistent tangent line in wheel rotation direction on the blade and impeller is more than or equal to 138 °, and it is less than or equal to 153 °.The utility model has the advantages that can be effectively reduced noise, reducing sound pollution, more environmentally-friendly.

Description

Environmentally friendly denoising draught fan

Technical field

The utility model relates to blower field, especially a kind of environmentally friendly denoising draught fan.

Background technique

Centrifugal blower is the pressure energy and kinetic energy that gas is converted to using the mechanical energy of draught fan impeller rotation, and gas is defeated It sees off, gas is rotated through impeller and generates air energy along the streamlined air inlet air inlet through hollow shaft of blower, along screw type shell by gas Body radially exports, then sends out from shell air outlet.In Blower Housing, gas and changing flow direction causes to slow down, this to subtract Speed effect converts kinetic energy into pressure energy.During the conversion of this energy, pressed gas quickly flows in Blower Housing A large amount of noises are generated with blower inner wall collision friction, particularly with high-power blower, noise is bigger, in the process used In, excessive noise not only threatens to the physical and mental health of staff in environment, but also will form a kind of sound pollution, shadow Ring the normal life of nearby residents.

Utility model content

In order to overcome the above problem, the utility model to society provide it is a kind of can be effectively reduced noise, reduce sound Pollution, more environmentally-friendly environmentally friendly denoising draught fan.

The technical solution of the utility model is: providing a kind of environmentally friendly denoising draught fan, including Blower Housing, the Blower Housing Equipped with air inlet and air outlet, an impeller is provided in the Blower Housing, the rear end of the Blower Housing is equipped with motor, institute The output axis connection for stating impeller and motor is equipped with collector in Blower Housing, and the collector is arranged before the impeller, institute Stating Blower Housing is spiral case, and the air outlet of the Blower Housing extends to volute tongue side to be expanded, so that the snail of the Blower Housing Relationship between the radius r of the circular arc of the bottom end of tongue and the radius R2 of impeller is r=0.07~0.09R2, the leaf on the impeller For piece along the circumferential arrangement of impeller, the angle α between the same consistent tangent line in wheel rotation direction on the blade and impeller is big In be equal to 138 °, and be less than or equal to 153 °.

As the improvement to the utility model, the distance between two end faces of impeller L1 is the impeller accommodating cavity The distance between two end faces L2 90%-96%.

As the improvement to the utility model, one is equipped in the end face opposite with air inlet of the Blower Housing and reinforces knot Ruggedized construction described in structure includes lower concave part, is uniformly arranged in the inside of the lower concave part there are four " mountain " font reinforcing rib, described Lower concave part is rounded, and is overlapped with the center of circle of the end face where it.

As the improvement to the utility model, the diameter R1 of the lower concave part and the diameter D2 of the impeller are equal.

As the improvement to the utility model, the material of the Blower Housing and impeller is glass reinforced plastic.

It further include the first connector as the improvement to the utility model, the impeller is fixed on by the first connector In the Blower Housing.

The utility model is since including Blower Housing, the Blower Housing is equipped with air inlet and air outlet, in the blower An impeller is provided in shell, the rear end of the Blower Housing is equipped with motor, the output axis connection of the impeller and motor, in wind Collector is equipped in casing body, the collector is arranged before the impeller, and the Blower Housing is spiral case, the Blower Housing Air outlet extend to volute tongue side and expand so that the radius r of the circular arc of the bottom end of the volute tongue of the Blower Housing and impeller Relationship between radius R2 is r=0.07~0.09R2, the blade on the impeller along impeller circumferential arrangement, the blade with The angle α between the same consistent tangent line in wheel rotation direction on impeller is and to be less than or equal to 153 ° more than or equal to 138 °.Gas It is rotated in Blower Housing, since the air outlet is expanded to volute tongue side, so that when air-flow passes through air outlet, surface channel Long-pending continuous expansion, gas flow through it is more smooth when air outlet, and between the circular arc of the bottom end of the volute tongue and the radius of impeller There is the relationship of a restriction, in this way, the radius that the circular arc of the bottom end of volute tongue in suitable range, is unlikely to circular arc is too small and lead Cause noise excessive, the radius for being also unlikely to circular arc is excessive and influences the flowing of the gas of air outlet, gas and Blower Housing friction and The noise of generation is just smaller, and the noise of generation is also just smaller；Therefore, the utility model have can be effectively reduced noise, subtract The advantages of few sound pollution, more environmentally-friendly.

Detailed description of the invention

Fig. 1 is the floor map after the fan section of the utility model is dismantled.

Fig. 2 is the whole decomposition texture schematic diagram of blower.

Fig. 3 is the side view of Blower Housing and impeller.

Specific embodiment

In the description of the present invention, it should be understood that "center" in term, "upper", "lower", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching State the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with Specific orientation construction and operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " It is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connection ", " connected " shall be understood in a broad sense, for example, it may be being fixedly connected, be also possible to dismantling connection, or integrally connect It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, be also possible to indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Concrete meaning of the language in the utility model.In addition, in the description of the present invention, unless otherwise indicated, " multiple ", " several " It is meant that two or more.

What Fig. 1 to Fig. 3 was disclosed is a kind of embodiment of environmentally friendly denoising draught fan, a kind of environmental protection denoising draught fan, including one sets There is a Blower Housing 1 of air inlet 11 and air outlet 12, in the utility model, the Blower Housing 1 is detachable, the wind Casing body 1 includes the first housing parts 15 and the second housing parts 16, and first housing parts 15 and second part of shell 16 are corresponding identical It is whole to constitute Blower Housing 1, in the utility model, it is preferred that the Blower Housing 1 is spiral case；It is set in the Blower Housing 1 There is the impeller accommodating cavity 10 for accommodating impeller 2, is provided with an impeller 2 in the impeller accommodating cavity 10, in the utility model, Preferably, the impeller 2 include the first support plate 21, with 21 predetermined distance of the first support plate and corresponding identical Second support plate 22, and the several blades 220 being arranged between first support plate 21 and the second support plate 22, it is several The blade 220 according to preset spacing arrangement between first support plate 21 and the second support plate 22, the blade 220 It is vertical with first support plate 21 and the second support plate 22.The rear end of the Blower Housing 1 is equipped with motor (can not in figure See), the output axis connection of the impeller 2 and motor, the motor is used to drive the rotation of impeller 2, to suck gas to wind In casing body 1, in the utility model, collector 71 is equipped in Blower Housing 1, the collector 71 is arranged in the impeller 2 Before, the Blower Housing 1 is spiral case, and the air outlet 12 of the Blower Housing 1 extends to 20 side of volute tongue to be expanded, so that the wind Relationship between the radius r of the circular arc of the bottom end of the volute tongue 20 of casing body 1 and the radius R2 of impeller 2 be r=0.07~ 0.09R2, along the circumferential arrangement of impeller 2, the blade 220 turns with the same impeller on impeller 2 for blade 220 on the impeller 2 Angle α between the dynamic consistent tangent line in direction is and to be less than or equal to 153 ° more than or equal to 138 °.When in use, gas is in blower Rotation in shell, since the air outlet is expanded to volute tongue side, so that aisle spare is not when air-flow passes through air outlet Disconnected to expand, gas flows through more smooth when air outlet, and has one between the circular arc of the bottom end of the volute tongue and the radius of impeller The relationship of restriction, in this way, the radius that the circular arc of the bottom end of volute tongue in suitable range, is unlikely to circular arc is too small and lead to noise Excessive, the radius for being also unlikely to circular arc is excessive and influences the flowing of the gas of air outlet, gas and Blower Housing friction and generate Noise is just smaller, and the noise of generation is also just smaller.

In the utility model, the distance between two end faces of the impeller 2 L1 is two of the impeller accommodating cavity 10 The 90%-96% of the distance between end face L2, in the utility model, specifically, the distance between two end faces of the impeller 2 L1 is the 93% of the distance between two end faces of the impeller accommodating cavity 10 L2, in the utility model, the benefit of such setting It is, the distance between two end faces of the impeller 2 and impeller accommodating cavity 10 within this range, can obtain maximum gas While body flow and flow rate, also it is unlikely to because of excessive gas flow and flow velocity the pressure coerced caused by impeller accommodating cavity 10 Power can be good at the use for protecting impeller accommodating cavity 10；The size of the impeller 2 is unlikely to excessive and generates excessive gas Flow and flow rate oppresses the entire impeller accommodating cavity 10, causes to cause impeller accommodating cavity 10 excessive pressure, also be unlikely to Because the flow and flow rate of gas is too small, and the efficiency of blower is influenced, is designed by this time, so that the utility model 3 blowers Gas flow and flow rate can achieve the effect that 5 blower gas flow and flow rate, the not only flow of gas Greatly, flow velocity is high, and effect is good, it is often more important that material can be saved, thus save the cost, in addition, also can using the blower Energy saving improves efficiency well.

In the utility model, it is preferred that be equipped with one in the end face opposite with air inlet 11 of the Blower Housing 1 and reinforce knot Structure 4, the ruggedized construction 4 include lower concave part 41, the inside of the lower concave part 41 be uniformly arranged there are four " mountain " font reinforce Muscle 42, the lower concave part 41 are rounded, and are overlapped with the center of circle of the end face where it.In the utility model, the lower concave part 41 Diameter R1 it is equal with the diameter D2 of the impeller 2." mountain " font reinforcing rib 42 described in four is separately positioned on the lower concave part 41 3 o'clock direction, 6 o'clock direction, 9 o'clock direction and 12 o'clock direction, the opening direction of " mountain " the font reinforcing rib 42 The edge of lower concave part 41 is simultaneously resisted against on the edge of lower concave part 41.In the utility model, the effect of the ruggedized construction is to described Blower Housing plays booster action；In addition, in blower in the prior art, pressed gas is in Blower Housing 1 when blower work Quickly flowing with blower inner wall collision friction and generate a large amount of noises, especially for the corresponding end face of air inlet, gas It collides to vibrate with blower inner wall, generates biggish noise, and in the utility model, on first housing parts 15 The presence of ruggedized construction 4 can aggravate the weight of Blower Housing 1, increase its fastness, reduce pressed gas in Blower Housing 1 Interior quick flowing and blower inner wall collision friction vibrate and the noise of generation, collides to send out with blower inner wall to reduce air-flow The noise of raw vibration and generation, achievees the purpose that noise reduction.

In the utility model, it is preferred that four T-type reinforcing ribs 42 are separately positioned on 3 o'clock of the lower concave part 41 Direction, 6 o'clock direction, 9 o'clock direction and 12 o'clock direction.So being uniformly distributed setting is advantageous in that, can tie to reinforcing Face where structure 4 plays the role of uniformly reinforcing, while noise reduction effect also can be more preferable.

In the utility model, it is preferred that the material of the Blower Housing 1 and impeller 2 is glass reinforced plastic；Glass reinforced plastic has quality Gently, hard, performance is stablized, high mechanical strength and corrosion resistant advantage.

In the utility model, it is preferred that further include the first connector 6, the impeller 2 is fixed on by the first connector 6 In the Blower Housing 1.

In the utility model, it is preferred that further include collector 71 and the second connector 72, the collector 71 passes through described Second connector 72 is arranged before the impeller 2, and the collector 71 can equably be full of the entrance section of impeller, and gas It is the smallest for flowing through drag losses when collector 71, and in the utility model, the collector 71 advantageously reduces noise, is increased Gas flow.

Claims (6)

1. a kind of environmental protection denoising draught fan, it is characterised in that: including Blower Housing (1), the Blower Housing (1) is equipped with air inlet (11) and air outlet (12) it, is provided with an impeller (2) in the Blower Housing (1), the rear end of the Blower Housing (1) is equipped with Motor, the output axis connection of the impeller (2) and motor are equipped with collector (71) in Blower Housing (1), the collector (71) it is arranged before the impeller (2), the Blower Housing (1) is spiral case, and the air outlet (12) of the Blower Housing (1) is to snail Tongue (20) side extends expansion, so that the radius r of the circular arc of the bottom end of the volute tongue (20) of the Blower Housing (1) and impeller (2) Radius R2 between relationship be r=0.07~0.09R2, circumferential row of the blade (220) on the impeller (2) along impeller (2) Column, the angle α between the same consistent tangent line in wheel rotation direction on the blade (220) and impeller (2) for more than or equal to 138 °, and it is less than or equal to 153 °.

2. environmental protection denoising draught fan according to claim 1, it is characterised in that: between two end faces of the impeller (2) Distance L1 is the 90%-96% of the distance between two end faces of the impeller accommodating cavity (10) L2.

3. environmental protection denoising draught fan according to claim 1 or 2, it is characterised in that: in the Blower Housing (1) and air inlet It includes lower concave part (41) that the opposite end face of mouth (11), which is equipped with a ruggedized construction (4) ruggedized construction (4), in the lower concave part (41) inside is uniformly arranged there are four " mountain " font reinforcing rib (42), and the lower concave part (41) is rounded, and with where it The center of circle of end face is overlapped.

4. it is according to claim 3 environmental protection denoising draught fan, it is characterised in that: the diameter R1 of the lower concave part (41) with it is described The diameter D2 of impeller (2) is equal.

5. environmental protection denoising draught fan according to claim 1 or 2, it is characterised in that: the Blower Housing (1) and impeller (2) Material be glass reinforced plastic.

6. environmental protection denoising draught fan according to claim 1 or 2, it is characterised in that: it further include the first connector (6), it is described Impeller (2) is fixed in the Blower Housing (1) by the first connector (6).