CN207685744U - Air duct part and road cleaner - Google Patents

Abstract

The utility model is related to field of sanitation machinery technology, more particularly to a kind of air duct part and road cleaner.The air duct part of the utility model, including air duct part ontology, air duct part ontology includes air duct, tunnel inlet and ducting outlet, air duct is set to air duct part body interior, tunnel inlet and ducting outlet are connected to air duct respectively, and air-flow flows into air duct from tunnel inlet and flowed out from ducting outlet, and, the air duct part further includes noise elimination noise reduction structure, and the noise elimination noise reduction structure is for reducing flowing through the pneumatic noise in air duct.The utility model can reduce the noise for the air-flow for flowing through air duct, therefore, it is possible to effectively reduce the noise intensity at the part of air duct by the way that noise elimination noise reduction structure is arranged on the part of air duct.Moreover, the utility model can also improve the distribution of the pressure in the part of air duct, operating efficiency is promoted, reduces energy consumption, and effectively promotes the reliability and durability of air duct part and its appurtenances.

Description

Air duct part and road cleaner

Technical field

The utility model is related to field of sanitation machinery technology, more particularly to a kind of air duct part and road cleaner.

Background technology

Air duct part is the important component of the air-transport system of the environmental sanitation such as road cleaner machinery, in road cleaner When work, air-flow flows through air duct part and flows to blowing for air-transport system caused by the power source (wind turbine) of air-transport system Air port.Air-flow will produce the pressure loss during flowing through air duct part, and form larger noise.

By taking road cleaner as an example, air duct part is generally square pipe and is relatively large in diameter, when air is passing through air duct part Bend when, due to flow direction variation, fluid distrbution unevenness cause energy loss, cause pipeline flow resistance increase, fluid be easy Turbulent flow is formed, and turbulent flow is the major reason that air duct part eddy current crack is formed.

However, special noise elimination noise reduction structure, making an uproar at the part of air duct is not arranged on the air duct part of road cleaner at present Sound fails to be controlled effectively.

Utility model content

A technical problem to be solved in the utility model is：Reduce the noise at the part of air duct.

In order to solve the above-mentioned technical problem, the utility model provides a kind of air duct part.The air duct part includes air duct part sheet Body, air duct part ontology include air duct, tunnel inlet and ducting outlet, and air duct is set to air duct part body interior, tunnel inlet and Ducting outlet is connected to air duct respectively, and air-flow flows into air duct from tunnel inlet and flowed out from ducting outlet, which is characterized in that air duct Part further includes noise elimination noise reduction structure, noise elimination noise reduction structure for reducing the air-flow for flowing through air duct noise.

Optionally, noise elimination noise reduction structure includes flow-disturbing fin, and flow-disturbing fin is set in air duct, and air duct is flowed through for reducing Air-flow caused by vortex.

Optionally, flow-disturbing fin is connected on the inner wall in air duct and with first be sequentially arranged along air current flow direction End and second end；Flow-disturbing fin includes at least one guide face being connect with inner wall, and at least one guide face includes the first water conservancy diversion Face, the first guide face is located at the first end of flow-disturbing fin and its bottom end is connect with inner wall, and the first guide face is gradually remote from its bottom end It tilts from inner wall and towards the second end of flow-disturbing fin and extends.

Optionally, the middle part of the first guide face relative to the both sides of the edge of the width direction of the first guide face away from interior The direction of wall is protruded, and/or, along air current flow direction, the width of the first guide face gradually narrows.

Optionally, both sides of the edge of the middle part of the width direction of the first guide face relative to the width direction of the first guide face Away from the direction protrusion of inner wall.

Optionally, the profile of the bottom end of the first guide face is in arc-shaped or class arc-shaped.

Optionally, at least one guide face further includes two the second guide faces, and two the second guide faces are connected to The both sides of one guide face simultaneously be located at flow-disturbing fin first end and the second end of flow-disturbing fin between, the bottom end of the second guide face with Inner wall connects, and two the second guide faces are gradually distance from inner wall from respective bottom end and gradually mutually draw close.

Optionally, the bottom end of two the second guide faces is gradually located remotely from each other along air current flow direction.

Optionally, at least one guide face further includes third guide face, and third guide face is set to the second of flow-disturbing fin It holds and is connect with the first guide face, and the bottom end of third guide face is connect with inner wall, third guide face is gradually distance from from its bottom end Inner wall simultaneously tilts extension towards the first end of flow-disturbing fin.

Optionally, third guide face is 5-25 ° from its bottom end towards the inclined angle of the first end of flow-disturbing fin.

Optionally, the cross sectional shape of third guide face is triangular in shape.

Optionally, flow-disturbing fin further includes bottom surface, and at least one guide face is connect by bottom surface with inner wall, along air-flow stream Dynamic direction, the width of bottom surface gradually broaden.

Optionally, flow-disturbing fin is set to the turning in air duct.

Optionally, noise elimination noise reduction structure includes variable cross-section noise elimination structure, and variable cross-section noise elimination structure has to be connected to air duct Noise elimination chamber flows through the direction of noise elimination chamber, the modified cross section of noise elimination chamber along air-flow.

Optionally, noise elimination chamber includes at least two hollow chamber to communicate with each other, at least two hollow chamber extremely A few modified cross section.

Optionally, at least two hollow chamber include flowing through the direction of noise elimination chamber along air-flow to set gradually and each other connect Logical the first hollow chamber and the second hollow chamber, the first hollow chamber and the second hollow chamber all have variable cross-section, and One hollow chamber is different with the cross section change rate of the second hollow chamber.

Optionally, one in the first hollow chamber and the second hollow chamber has flows through noise elimination chamber direction along air-flow The cross section become larger and another have and along air-flow flow through the gradually smaller cross section in noise elimination chamber direction.

Optionally, the first hollow chamber has flows through the gradually smaller cross section in noise elimination chamber direction along air-flow, also, Second hollow chamber has flows through the cross section that noise elimination chamber direction becomes larger along air-flow.

Optionally, the first hollow chamber and/or the second hollow chamber are in cone.

Optionally, at least two hollow chamber further include third hollow chamber, and it is hollow that third hollow chamber is set to first Between chamber and the second hollow chamber and it is connected to the first hollow chamber and the second hollow chamber, it is transversal that third hollow chamber has etc. Face or variable cross-section.

Optionally, third hollow chamber is cylinder.

Optionally, variable cross-section noise elimination structure further includes perforated plate, and perforated plate is set to the exit of noise elimination chamber.

Optionally, variable cross-section noise elimination structure is set at the ducting outlet in air duct.

Optionally, noise elimination noise reduction structure further includes the conducting element being set in noise elimination chamber, and conducting element includes rotatably setting The diversion division set, diversion division include at least two blades being intervally installed around the pivot center of diversion division, are eliminated the noise flowing through Under the action of the air-flow of chamber, diversion division can rotate.

Optionally, the direction of noise elimination chamber is flowed through along air-flow, the cross-sectional area of diversion division becomes larger.

Optionally, the maximum cross-section area of diversion division flows through noise elimination chamber more than or equal to noise elimination chamber along air-flow Direction is located at the smallest cross-section area of the part above diversion division.

Optionally, diversion division is in cone or class cone.

Optionally, conducting element further includes support portion, and diversion division is set on support portion, and support portion is eliminated the noise with variable cross-section and tied There is gap between the perforated plate of structure.

Optionally, conducting element is set in the second hollow chamber of noise elimination chamber.

On the other hand, the utility model additionally provides a kind of road cleaner comprising the air duct part of the utility model.

The utility model can reduce making an uproar for the air-flow for flowing through air duct by the way that noise elimination noise reduction structure is arranged on the part of air duct Sound, therefore, it is possible to effectively reduce the noise intensity at the part of air duct.Also, noise elimination noise reduction structure is set, it can also be by outside Sound wave in incoming air duct part is reflected and is interfered, and acoustic energy decaying is accelerated, and is reduced by making an uproar in external incoming air duct part Sound, this also contributes to reduce the noise intensity at the part of air duct.

Moreover, the noise elimination noise reduction structure of the utility model may include flow-disturbing fin variable cross-section noise elimination noise reduction structure and water conservancy diversion At least one of part, this can not only more effectively improve the noise level at the part of air duct, moreover it is possible to reduce due to air-flow is unordered Caused by the pressure loss, reduce energy consumption, realize the purpose of energy-saving and noise-reducing.In addition, the noise elimination noise reduction structure of the utility model The air-flow in the part air duct of air duct can also be made more steady, this is also beneficial to the stress for reducing air duct part and its accessory structure component Variation, improves the reliability and durability of product.

By the way that the exemplary embodiment of the utility model is described in detail referring to the drawings, the utility model its Its feature and its advantage will become apparent.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, other drawings may also be obtained based on these drawings.

Fig. 1 shows the overall structure diagram of the air duct part of one embodiment of the utility model.

Fig. 2 shows the dimensional structure diagrams of flow-disturbing fin in Fig. 1.

Fig. 3 shows partial sectional view of air duct part shown in Fig. 1 at variable cross-section noise elimination structure.

Fig. 4 shows the dimensional structure diagram of variable cross-section noise elimination structure in Fig. 3.

Fig. 5 shows the stereoscopic schematic diagram at another visual angle (vertical view) of Fig. 4.

Fig. 6 shows the sectional view of Fig. 4.

Fig. 7 shows the dimensional structure diagram of the conducting element in Fig. 6.

In figure：

1, air duct part ontology；10, air duct；

3, flow-disturbing fin；31, bottom surface；32, the first guide face；33, the second guide face；34, third guide face；

5, variable cross-section noise elimination structure；51, the first luminal structure；52, the second luminal structure；53, perforated plate；510, in first Plenum chamber；521, the second hollow chamber；511, third hollow chamber；

6, conducting element；61, diversion division；611, blade；62, support plate；63, rotation axis.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having There is the every other embodiment carried out and obtained under the premise of creative work, shall fall within the protection scope of the present invention.

Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable In the case of, the technology, method and apparatus should be considered as authorizing part of specification.

In the description of the present invention, it should be understood that limiting zero using the words such as " first ", " second " Part, it is only for convenient for being distinguished to corresponding parts, there is no Stated otherwise such as, above-mentioned word there is no particular meaning, Therefore it should not be understood as the limitation to scope of protection of the utility model.

Fig. 1-7 shows one embodiment of the utility model air duct part.Referring to Fig.1-7, provided by the utility model Air duct part, including air duct part ontology 1, air duct part ontology 1 include air duct 10, tunnel inlet and ducting outlet, and air duct 10 is set to Inside air duct part ontology 1, tunnel inlet and ducting outlet are connected to air duct 10 respectively, and air-flow flows into air duct 10 simultaneously from tunnel inlet It is flowed out from ducting outlet, moreover, the air duct part further includes noise elimination noise reduction structure, noise elimination noise reduction structure is for reducing flowing through air duct 10 Air-flow noise.

Due to being equipped with noise elimination noise reduction structure, the air duct part of the utility model can utilize the noise elimination noise reduction structure to drop The noise of the low air-flow for flowing through air duct 10, effectively control air-flow at the part of air duct caused by noise, weaken noise and propagate outward, Reduce noise pollution.

The noise elimination noise reduction structure of the utility model may include flow-disturbing fin 3 and/or variable cross-section noise elimination structure 5.

Wherein, flow-disturbing fin 3 is set in air duct 10, is vortexed caused by the air-flow in air duct 10 for reducing to flow through.By The vortex in air duct 10 can be reduced in the flow-disturbing fin 3, changes the rambling flow regime of air-flow, therefore, the flow-disturbing fin Piece 3 can effectively reduce the eddy current crack in air duct 10, reduce noise intensity, and it is also avoided that and is caused because air-flow is unordered The pressure loss.Wherein preferably, flow-disturbing fin 3 is set to the turning in air duct 10.Due to air-flow when by turning more Vortex is easy tod produce, therefore, flow-disturbing fin 3 is arranged at the turning in air duct 10, can more fully reduce vortex, more effectively Ground reduces eddy current crack.

As a kind of embodiment of the utility model flow-disturbing fin 3, flow-disturbing fin 3 can be connected to the inner wall in air duct 10 It goes up and there is the first end and second end being arranged along air current flow direction；Flow-disturbing fin 3 includes at least one connect with inner wall A guide face is flowed using this at least one guide face guiding air-flow, it is rambling when flowing through bend etc. to change air-flow Flow regime reduces vortex.

Variable cross-section noise elimination structure 5 has the noise elimination chamber being connected to air duct 10, and the side of noise elimination chamber is flowed through along air-flow To the modified cross section of noise elimination chamber.By the way that variable cross-section noise elimination structure 5 is arranged, it can make air-flow in noise elimination chamber Refraction and reflection back and forth is generated because of the sudden contraction in section and/or expansion, so as to sound energy consumption, reduces noise.This The variable cross-section noise elimination structure 5 of utility model is preferably disposed on the exit in air duct 10, in this way can air-flow flow out air duct part it Taking a step forward reduces noise, more effectively reduces the outside propagation of noise.

Moreover, the noise elimination noise reduction structure of the utility model further includes the conducting element 6 being set in noise elimination chamber, conducting element 6 Including the diversion division 61 being rotatably arranged, diversion division 61 includes being intervally installed at least around the center of rotation of diversion division 523 Two blades 611, under the action of flowing through the air-flow of noise elimination chamber, diversion division 61 can rotate.Since conducting element 6 can be in gas Stream is reflected and is reflected to sound wave during flowing through noise elimination chamber, therefore, conducting element 6 is arranged, can further decrease gas Flow noise.Moreover, when air-flow flows through noise elimination chamber, diversion division 61 can rotate under the action of air-flow, in diversion division During 61 rotations, the interval between adjacent blades 611, which is formed by space, to generate suction force with rotation, make air duct Air-flow in 10 is more smoothly exhausted under the swabbing action outside the part of air duct, can not only improve the expulsion efficiency of air-flow, Also help the pressure loss reduced in air duct 10.

With reference to embodiment shown in Fig. 1-7, the utility model is further described.The embodiment is clear with road For the air duct part of clean vehicle.

As shown in figs. 1-7, in this embodiment, air duct part includes air duct part ontology 1, flow-disturbing fin 3, variable cross-section noise elimination knot Structure 5 and conducting element 6, wherein flow-disturbing fin 3, variable cross-section noise elimination structure 5 and conducting element 6 are used as noise elimination noise reduction structure, for reducing Flow through noise caused by the air-flow of air duct part.

Arrow direction in Fig. 1 represents flow direction of the air-flow in the part of air duct.As shown in Figure 1, in this embodiment, wind Road part ontology 1 includes 10,1, air duct tunnel inlet and four ducting outlets, wherein tunnel inlet and ducting outlet are and air duct 10 are in fluid communication.The air-flow that the power sources such as wind turbine generate flows into air duct 10 from tunnel inlet, and flows to each air duct through air duct 10 Outlet, the connection of each ducting outlet blowback corresponding with the dust exhaust apparatus of external environment or road cleaner air port, to The air-transport system of road cleaner is set to carry out refuse sweeping operation using air circulation mode.

The flow-disturbing fin 3 of the embodiment is illustrated in conjunction with Fig. 1 and Fig. 2 first.

As shown in Figure 1, in this embodiment, flow-disturbing fin 3 is arranged in air duct 10, is used for low-flow in air duct 10 Generated noise.

Wherein, as shown in Figure 1, flow-disturbing fin 3 is arranged at the turning in air duct 10, air-flow can be more effectively reduced in this way The generated vortex in air duct 10 reduces noise, and reduces the pressure loss.Flow-disturbing fin 3 can be arranged individually or in rows. As shown in Figure 1, in this embodiment, multiple flow-disturbing fins 3 are arranged at intervals at turning for air duct 10 along the short transverse in air duct 10 The stream swirl on the entire longitudinal cross-section at 10 turning of air duct is destroyed in crook.Also, as shown in Figure 1, in the implementation In example, the side with smaller radius of curvature that each flow-disturbing fin 3 is arranged at the turning in air duct 10 (is in Fig. 1 Left side), vortex can be more effectively reduced in this way.

Specifically, as shown in Fig. 2, the flow-disturbing fin 3 of the embodiment includes bottom surface 31 and first leading as guide face Stream interface 32, the second guide face 33 and third guide face 34, wherein bottom surface 31 is connected on the inner wall in air duct 10, the first guide face 32, the bottom end of the second guide face 33 and third guide face 34 is all connected on bottom surface 31 namely the first guide face 32, the second water conservancy diversion Face 33 and third guide face 34 are connected on the inner wall in air duct 10 by bottom surface 31, realize flow-disturbing fin 3 in air duct 10 Installation.

In order to describe simplicity, below by one end positioned at upstream in the both ends in air current flow direction of bottom surface 31 Referred to as " first end of bottom surface 31 ", and one end positioned at downstream in the both ends in air current flow direction of bottom surface 31 is claimed For the first end and bottom surface 31 of " second end of bottom surface 31 " namely bottom surface 31 second end respectively refer to bottom surface 31 along air-flow stream The both ends that dynamic direction is sequentially arranged, while it can be appreciated that the first end of bottom surface 31 is the first end of aforementioned flow-disturbing fin 3, bottom The second end in face 31 is the second end of aforementioned flow-disturbing fin 3.

First guide face 32 is set to the first end of bottom surface 31, becomes windward side, is disturbed for guiding air-flow to be smoothly introduced into Flow fin 3.As shown in Fig. 2, in this embodiment, the bottom end of the first guide face 32 is by being connected to the first end of bottom surface 31 by company Be connected on the inner wall in air duct 10, and the first guide face 32 from its bottom end be gradually distance from bottom surface 31 (being gradually distance from inner wall) and towards The second end (i.e. the downstream of air current flow direction) of bottom surface 31, which tilts, to be extended.Based on the setting, the top phase of the first guide face 32 For the first guide face 32 bottom end upwards and tilt backwards, can leader air-flow smooth sequential upwards and flow backward It is dynamic, it reduces air-flow and wind speed or wind pressure risk jumpy occurs because flow path is mutated, so as to so that air-flow is more stable The turning in air duct 10 etc. is flowed through in an orderly manner, the place of turbulent flow easily occurs, and slow down flow velocity when air-flow flows through turning, in turn Vortex can be efficiently reduced, the noise level in air duct 10 is reduced.

In the present invention, before being with the upstream of air current flow direction, after the downstream with air current flow direction is, within It is upper to increase separate direction relative to inner wall, and be interior mutually to draw close under wall position is.

Moreover, as shown in Figure 2, in this embodiment, along air current flow direction, the width of the first guide face 32 is gradually received It is narrow.In this way so that the first guide face 32 is front wide and rear narrow, flows backward while air-flow more smooth sequential can be guided, reduce vortex It generates, effectively reduces noise intensity.

In addition, as shown in Fig. 2, in this embodiment, the middle part of the width direction of the first guide face 32 is led relative to first It is protruded away from the direction of inner wall the both sides of the edge of the width direction of stream interface 32.The first guide face 32 being arranged in this way, lower width It is upper narrow, air-flow can be guided upwards and to intermediate flow, and play certain shunting function to air-flow, be more advantageous to guiding air-flow Smooth flow.Moreover, the setting also contributes to accelerate the speed that air-flow flows out the first guide face 32, the is continued on convenient for air-flow Two guide faces 33 flow backward.

Specifically, in fig. 2, the reversed middle part of the width of the first guide face 32 protrudes to be formed away from the direction of inner wall Towering portion with middle part crestal line, and the towering portion by the first guide face 32 be divided to for positioned at two of the middle part crestal line both sides inwardly Inclined sub- face, this so that air-flow, can also be to intermediate flow along the first guide face 32 upwards and during flowing backward It is dynamic, and the air-flow moved along two sub- surface currents can be distributed, keep air flow method more uniform, so as to further enhance the The guide functions of one guide face 32 more fully reduce vortex.

Moreover, as shown in Figure 2, the profile of the first guide face 32 of the embodiment, bottom end is in arc-shaped.With the shape First guide face 32 of profile, further smoothly can guide air-flow to flow, and make air-flow by the bottom end of the first guide face 32 in circular cone Shape slows down air-flow velocity to diffusion around top and both sides etc., more effectively changes the mixed and disorderly unordered flow regime of air-flow, because This, can more effectively reduce vortex, further decrease noise and reduce the pressure loss.Certainly, the bottom end of the first guide face 32 Profile can also be in class arc-shaped, and the first guide face 32 can guide air-flow from itself bottom end in coniform to top in this case It is spread around end and both sides etc..Correspondingly, the profile of the first end for the bottom surface 31 being connect with the bottom end of the first guide face 32 It is also preferred that being set as arc-shaped or class arc-shaped.

Second guide face 33 is arranged in the side of the first guide face 32 and positioned at the of first end and the bottom surface 31 of bottom surface 31 Between two ends, water conservancy diversion is carried out for the air-flow to 32 side of the first guide face.As shown in figure 3, in this embodiment, two second Guide face 33 is connected to the both sides of the first guide face 32, and the bottom end of each second guide face 31 is both connected to the of bottom surface 31 Between one end and the second end of bottom surface 31, and two the second guide faces 33 from respective bottom end be gradually distance from inner wall and gradually mutually It draws close namely the top of two the second guide faces 33 is upwardly and inwardly tilted relative to the bottom end of the second guide face 33.It sets in this way The second guide face 33 set can not flowed by the air-flow of 32 water conservancy diversion of the first guide face with leader, and can continue to guide gas Stream flows to third guide face 34 so that the second guide face 33 and the first guide face 32 coordinate, and guide more air-flows the bottom of by jointly The second end for flowing to the first end smooth sequential in face 31 bottom surface 31, can more fully reduce vortex, so as to more effective Ground reduces noise.

In addition, as shown in Figure 2, in this embodiment, along air current flow direction, the width of bottom surface 31 gradually broadens.It should It is arranged and the bottom end for two the second guide faces 33 for being connected to 31 both sides of bottom surface is gradually located remotely from each other along air current flow direction, Air-flow can be guided more smoothly to flow through at shape mutation, realize that air-flow flows more in an orderly manner, and then can more effectively drop Low noise.

The second end in bottom surface 31 is arranged in third guide face 34, forms leeward, is disturbed for guiding air-flow smoothly to flow out Flow fin 3.As shown in Fig. 2, in this embodiment, third guide face 34 is connect with the first guide face 34, and third guide face 34 Bottom end be connected on the inner wall in air duct 10 by being connect with the second end of bottom surface 31, third guide face 34 is gradual from its bottom end It tilts far from inner wall and towards the first end of bottom surface 31 and extends.The top of third guide face 34 is relative to third guide face 34 in this way Bottom end upwards and turn forward so that third guide face 34 flows out flow-disturbing fin 3 with capable of guiding air-flow smooth sequential, and can To effectively reduce reflux of the air-flow in the second end of flow-disturbing fin 3, and reduce windage.Specifically, the third water conservancy diversion of the embodiment Face 34 is 5-25 ° from bottom end towards first end (i.e. the first end of flow-disturbing fin 3) inclined angle of bottom surface 31, that is, the The top of three guide faces 34 relative to third guide face 34 bottom end upwards and the angle that turns forward is 5-25 °, incline with this The third guide face 34 of rake angle can more effectively improve air-flow flowing stationarity and reduce reflux, also, windage smaller.

Moreover, as shown in Figure 2, the third guide face 34 of the embodiment, cross sectional shape is triangular in shape.Since triangle is cut Face can guide air-flow when flowing out flow-disturbing fin 3 from middle part to two side diffusions, and the steady of enhancing air-flow subsequent flowing process has Sequence, therefore, the third guide face 34 with the cross sectional shape can preferably play water conservancy diversion Noise Reduction.

By analyzing the flow-disturbing the fin 3 it is found that embodiment above, led by setting bottom surface 31, the first guide face 32, second Stream interface 33 and third guide face 34, and to the shape of bottom surface 31, the first guide face 32, the second guide face 33 and third guide face 34 It is rationally designed with position etc., the flow velocity and pressure when high-speed gas flows through the positions such as turning in air duct 10 can be improved Distribution, keeps air-flow more uniform in these position distributions, is formed to more effectively reduce turbulent flow, and it is strong more fully to reduce noise Degree and the reduction pressure loss.

Certainly, in the other embodiment of the utility model, bottom surface 31 can also be omitted, and by the first guide face 32, The bottom end of two guide faces 33 and third guide face 34 is connected to directly or by other structures on the inner wall in air duct 10, and the implementation Setting bottom surface 31 is advantageous in that in example, installation of the flow-disturbing fin 3 in air duct 10 of being more convenient for.

Below mainly in combination with Fig. 1 and Fig. 3-7 come to the embodiment variable cross-section noise elimination structure 5 and conducting element 6 illustrate.

As shown in Figure 1, in this embodiment, variable cross-section noise elimination structure 5 is arranged at ducting outlet, for being flowed out in air-flow The noise of air-flow is further decreased before the part of air duct.Wherein it is possible to one or several at four ducting outlets of air duct part The variable cross-section noise elimination structure 5 is arranged in a place.Moreover, in conjunction with Fig. 3-Fig. 6 it is found that the variable cross-section noise elimination structure 5 of the embodiment includes The first luminal structure that perforated plate 53 and the direction that variable cross-section noise elimination structure 5 is flowed through along air-flow set gradually and communicate with each other 51 and second luminal structure 52.Second luminal structure 52 is connect by the first luminal structure 51 with air duct part ontology 1.

Wherein, the first luminal structure 51 has hollow in the first hollow chamber 510 of cone and cylinder third Chamber 511；Second luminal structure 52 has the second hollow chamber 521 in cone.Third hollow chamber 511 is set to first Between hollow chamber 510 and the second hollow chamber 521 and it is connected to the first hollow chamber 510 and the second hollow chamber 521.Also, The direction of variable cross-section noise elimination structure 5 is flowed through along air-flow, the cross section of the first hollow chamber 510 tapers into；Second hollow cavity The cross section of room 521 becomes larger；The cross section of third hollow chamber 511 is equal.

Based on above-mentioned setting, the noise elimination chamber of variable cross-section noise elimination structure 5 includes three hollow chamber, and three hollow chamber Include that the hollow chamber (i.e. the first hollow chamber 510 and the second hollow chamber 521) of two variable cross-sections and one are located at two Iso-cross-section hollow chamber (i.e. third hollow chamber 511) among variable cross-section noise elimination chamber.Due to the first hollow chamber 510 Respectively there is variable cross-section with the second hollow chamber 521, therefore, when air-flow flows through any one of the two hollow chamber When, reflection and refraction can be repeated in corresponding hollow chamber, and due to reflecting and a part in refracting process Acoustic energy can be dissipated, and therefore, can reduce noise.Moreover, because the connection exported with air duct 10 in the first hollow chamber 510 Place, the first hollow chamber 510 are with the junction of third hollow chamber 511 and in third hollow chamber 511 and the second hollow cavity There is suddenly change in the cross section of the junction of room 521, noise elimination chamber, such as in by third hollow chamber 511 and second There is expansion suddenly in the junction cross section of plenum chamber 521, therefore, this makes sound wave can also in each corresponding join domain Occur to reflect and reflect to and fro, so as to the acoustic energy that dissipates, reduces noise.Also, it in this embodiment, is flowed through along air-flow The direction of noise elimination chamber, the first hollow chamber 510 gradually taper up, and the second hollow chamber 521 gradually expands, and not only can effectively drop Low noise more effectively can also guide air-flow to flow, and make air-flow is more stable to flow out air duct part in an orderly manner, and reduce windage.

Perforated plate 53 is arranged in the exit of the second hollow chamber 521, namely is arranged in the exit of noise elimination chamber.Perforation Multiple through-holes can be uniformly or non-uniformly set on plate 53, noise elimination chamber and external environment are connected to by through-hole.Based on this, sound wave When by perforated plate 53, because of the effect of frictional resistance and viscosity resistance, part acoustic energy can be converted into thermal energy consumption and dissipate, so as to Noise is enough further decreased, the outside propagation of noise is reduced.

In addition, by Fig. 3-Fig. 7 it is found that in this embodiment, the noise elimination chamber interior of variable cross-section noise elimination structure 5, which is additionally provided with, to be led Flow part 6.In conjunction with Fig. 6 and Fig. 7 it is found that the conducting element 6 of the embodiment is set in the second hollow chamber 521 comprising rotatable The diversion division 61 of setting, diversion division 61 include the multiple blades 611 being intervally installed around the pivot center of diversion division 523, Under the action of the air-flow for flowing through noise elimination chamber, diversion division 61 can rotate.By the way that the conducting element 6 is arranged, when air-flow flows through noise elimination When chamber, diversion division 61 can rotate under the action of air-flow so that the interval between adjacent blades 611 is with rotation production Light soy sauce suction sends out the air-flow suction in air duct 10 except the part of air duct, it is thus possible to improve the expulsion efficiency of air-flow, and have Effect reduces the pressure loss.Moreover, the diversion division 61 of rotation, more effectively can also be reflected and be reflected to sound wave, played and disappear The effect of sound noise reduction.Certainly, the quantity of blade 611 may be two；And conducting element 6 can also be arranged in the first hollow chamber 510 or third hollow chamber 511 in.

Specifically, as shown in fig. 6, the conducting element 6 of the embodiment further includes support portion, specially support plate 62, along gas Stream flows through the direction of noise elimination chamber, and support portion is concentrically disposed at the upstream of perforated plate 53 with perforated plate 53, and diversion division 61 is set It sets on support portion.Support portion, which is arranged, can more easily realize rotatable setting of the diversion division 61 in noise elimination chamber, and prop up Support part can close the bottom end at the interval between adjacent blades 611, form open-topped diversion cavity, be more advantageous to pumping Inspiratory flow and rebound noise.More specifically, it will be appreciated from fig. 6 that in this embodiment, between having between support plate 62 and perforated plate 53 Unoccupied place is arranged in 53 upstream of perforated plate, and there are spaces in this way between conducting element 6 and perforated plate 53, are flowed convenient for air-flow, and just Play the role of reducing pneumatic noise in perforated plate 53.Also, rotation axis 63 passes through support plate 62 and is connect with perforated plate 53, respectively A blade 611, which is spaced around rotation axis 63, to be arranged.On the one hand, rotation axis 63 forms the pivot center of diversion division 62, convenient for leading Stream portion 62 rotates；On the other hand, rotation axis 63 also acts as certain supporting role, is easy to implement conducting element 6 in noise elimination chamber Reliable installation.

In addition, as shown in fig. 7, in this embodiment, flow through the direction of noise elimination chamber along air-flow, blade 611 it is transversal Face becomes larger, so that and the cross-sectional area of diversion division 61 becomes larger along the direction that air-flow flows through noise elimination chamber, It is not only convenient for guiding air-flow outflow noise elimination chamber, resistance is smaller, is also more advantageous to rebound sound wave, reduces noise.Moreover, by Fig. 6 It is found that the diversion division 61 of the embodiment, the maximum cross-section area is more than the outlet end cross-sectional area of third hollow chamber 511 (i.e. The direction that noise elimination chamber is flowed through along air-flow of noise elimination chamber is located at the smallest cross-section area of the part of 61 top of diversion division), this Sample conducting element 6 can preferably play the role of rebound sound wave, reduction noise.Wherein, alternatively, the maximum of diversion division 61 is horizontal Sectional area can also be located at the part of 61 top of diversion division equal to the direction for flowing through noise elimination chamber along air-flow of noise elimination chamber Smallest cross-section area.Also, one end of the separate pivot center of blade 611 is curvilinear, in figure 6 specially arc, windage Smaller, and swabbing action is more preferable in rotary course, is more advantageous to ventilation noise reduction.

It is in up-small and down-big cone specifically by Fig. 6 and Fig. 7 it is found that the diversion division 61 of the embodiment is in cone. Based on this, diversion division 61 can be aspirated more effectively and air-flow is guided to flow out to noise elimination exterior thereto, can also be more effectively anti- Noise, and structure also relatively simple beauty are played, it is easy to process.Certainly, diversion division 61 can also be in the other shapes such as class cone.

As it can be seen that the embodiment is located at the flow-disturbing fin 3 inside air duct 10 and the change at ducting outlet by setting Section noise elimination structure 5 and conducting element 6 etc. so that from air duct 10 is entered to during the entire process of outflow from air duct 10, air-flow institute The noise of generation can be effectively suppressed, and effective reduction to noise can be realized on the flow path of entire air duct part, be eliminated the noise Noise reduction is apparent；Moreover, the embodiment can be effectively improved the distribution of the pressure in the part of air duct, be conducive to reducing noise intensity While, the operating efficiency using its road cleaner is promoted, operation oil consumption is reduced.

In addition, on the one hand the noise at the part of air duct is derived to flow through under fan action and be made an uproar caused by the air-flow in air duct 10 On the other hand sound may also also derive from the noise in external incoming air duct part.Noise elimination noise reduction structure set by the embodiment, It, can also be by reflecting the sound wave in external incoming air duct part while reducing the noise for the air-flow for flowing through air duct 10 With interference etc., accelerates acoustic energy decaying, reduce by the noise in external incoming air duct part, this also contributes to reduce at the part of air duct Noise intensity.

Also, due to the setting of flow-disturbing fin 3 and conducting element 6 etc., air-flow in air duct part air duct 10 can also be made more Steadily, reduce the stress variation of air duct part and its accessory structure component, therefore, the embodiment also contribute to air duct part and its The reliability and durability of accessory structure component.

It should be noted that in the other embodiment of the utility model, noise elimination chamber is not limited to include the simultaneously One hollow chamber 510, the second hollow chamber 521 and third hollow chamber 511, but can also only include one in three or Two.In fact, as long as noise elimination chamber includes at least two hollow chamber to communicate with each other, and in this at least two hollow chamber At least one modified cross section, you can so that variable cross-section noise elimination structure 5 is played the role of certain noise elimination noise reduction.

Moreover, the shape of the first hollow chamber 510 and the second hollow chamber 521 is not limited to cone, the two can be with Using other shapes with variable cross-section.Although also, the first hollow chamber 510 is set as gradually tapering up by diagram embodiment And the second hollow chamber 521 is set as gradually expanding, it is to be understood that, the direction of noise elimination chamber is flowed through along air-flow, The variation of the cross section of first hollow chamber 510 and the second hollow chamber 521 is also not necessarily limited to this mode.For example, along air-flow stream Direction through noise elimination chamber, can also the cross section of the first hollow chamber 510 become larger, and the cross of the second hollow chamber 521 Section then tapers into.That is, in the present invention, it can be with one in the first hollow chamber 511 and the second hollow chamber 521 With along air-flow flow through cross section that noise elimination chamber direction becomes larger and another with flowing through noise elimination chamber along air-flow The gradually smaller cross section in direction, this spline structure is simpler, and appearance is more beautiful, and intensity is higher, and is conducive to make air-flow by During flowing to the second hollow chamber 521 energy loss more effectively occurs because of the abrupt change of cross-section for one hollow chamber 510, to More effectively reduce noise.Alternatively, for another example flow through the direction of noise elimination chamber along air-flow, the first hollow chamber 521 it is transversal Face and the cross section of the second hollow chamber 521 can also become larger or taper into, as long as the cross section variation of the two Rate is different, also can be mutated with Formation cross-section, play the role of preferably reducing noise.

The shape of third hollow chamber 510 is also not limited to cylinder, can also use other prismatic shapes, even It can also use variable cross-section shape.And be advantageous in that using cylinder, it is simple in structure, it is easy to process, and convenient for the One hollow chamber 510 or the second hollow chamber 521 cooperatively form cross section mutation, reduce noise.

Since the air duct part of the utility model is applied to road cleaner, water conservancy diversion cleaning vehicle pneumatic transporting can be effectively solved Send system noise larger and problem that operation oil consumption is more.So the utility model additionally provides a kind of road cleaner, packet Include the air duct part of the utility model.

The foregoing is merely the exemplary embodiments of the utility model, are not intended to limit the utility model, all in this reality Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the utility model Within protection domain.

Claims (30)

1. a kind of air duct part, including air duct part ontology (1), the air duct part ontology (1) includes air duct (10), tunnel inlet and wind Road exports, and the air duct (10) is set to air duct part ontology (1) inside, the tunnel inlet and ducting outlet difference It being connected to the air duct (10), air-flow flows into the air duct (10) from the tunnel inlet and is flowed out from the ducting outlet, It is characterized in that, the air duct part further includes noise elimination noise reduction structure, and the noise elimination noise reduction structure is for reducing flowing through the air duct (10) noise of air-flow.

2. air duct part according to claim 1, which is characterized in that the noise elimination noise reduction structure includes flow-disturbing fin (3), institute It states flow-disturbing fin (3) to be set in the air duct (10), vortex caused by the air-flow in the air duct (10) is flowed through for reducing.

3. air duct part according to claim 2, which is characterized in that the flow-disturbing fin (3) is connected to the air duct (10) Inner wall on and with the first end and second end that is sequentially arranged along the air current flow direction；Flow-disturbing fin (3) packet Including at least one guide face being connect with the inner wall, at least one guide face includes the first guide face (32), and described the One guide face (32) is located at the first end of the flow-disturbing fin (3) and its bottom end is connect with the inner wall, first guide face (32) it is gradually distance from the inner wall from its bottom end and is tilted towards the second end of the flow-disturbing fin (3) and extend.

4. air duct part according to claim 3, which is characterized in that the middle part of first guide face (32) is relative to described The both sides of the edge of the width direction of first guide face (32) are protruded away from the direction of the inner wall, and/or, along the gas Flow direction is flowed, the width of first guide face (32) gradually narrows.

5. air duct part according to claim 3, which is characterized in that

The middle part of the width direction of first guide face (32) relative to first guide face (32) width direction two Lateral edges are protruded away from the direction of the inner wall.

6. air duct part according to claim 3, which is characterized in that the profile of the bottom end of first guide face (32) is in circle Arcuation or class arc-shaped.

7. air duct part according to claim 3, which is characterized in that at least one guide face, which further includes two second, leads Stream interface (33), two second guide faces (33) are connected to the both sides of first guide face (32) and are disturbed positioned at described Flow fin (3) first end and the second end of the flow-disturbing fin (3) between, the bottom end of second guide face (33) with it is described Inner wall connects, and two second guide faces (33) are gradually distance from the inner wall from respective bottom end and gradually mutually draw close.

8. air duct part according to claim 7, which is characterized in that the bottom end of two second guide faces (33) is along institute Air current flow direction is stated gradually to be located remotely from each other.

9. air duct part according to claim 3, which is characterized in that at least one guide face further includes third guide face (34), the third guide face (34) is set to the second end of the flow-disturbing fin (3) and connects with first guide face (32) It connects, and the bottom end of the third guide face (34) is connect with the inner wall, the third guide face (34) is gradually remote from its bottom end It tilts from the inner wall and towards the first end of the flow-disturbing fin (3) and extends.

10. air duct part according to claim 9, which is characterized in that the third guide face (34) is from its bottom end towards institute The inclined angle of first end for stating flow-disturbing fin (3) is 5-25 °.

11. air duct part according to claim 9, which is characterized in that the cross sectional shape of the third guide face (34) is in three It is angular.

12. air duct part according to claim 3, which is characterized in that the flow-disturbing fin (3) further includes bottom surface (31), institute At least one guide face is stated to connect with the inner wall by the bottom surface (31), along the air current flow direction, the bottom surface (31) width gradually broadens.

13. air duct part according to claim 2, which is characterized in that the flow-disturbing fin (3) is set to the air duct (10) Turning.

14. according to any air duct parts of claim 1-13, which is characterized in that the noise elimination noise reduction structure includes variable cross-section Noise elimination structure (5), the variable cross-section noise elimination structure (5) has the noise elimination chamber being connected to the air duct (10), along air-flow stream Direction through the noise elimination chamber, the modified cross section of noise elimination chamber.

15. air duct part according to claim 14, which is characterized in that the noise elimination chamber includes at least two to communicate with each other A hollow chamber, the modified cross section of at least one of described at least two hollow chamber.

16. air duct part according to claim 15, which is characterized in that at least two hollow chamber includes along air-flow The direction for flowing through the noise elimination chamber is set gradually and the first hollow chamber (510) to communicate with each other and the second hollow chamber (521), first hollow chamber (510) and second hollow chamber (521) all have variable cross-section, and in described first Plenum chamber (510) is different with the cross section change rate of the second hollow chamber (521).

17. air duct part according to claim 16, which is characterized in that first hollow chamber (510) and described second One in hollow chamber (521) has and flows through the cross section and another that noise elimination chamber direction becomes larger along air-flow With flowing through the gradually smaller cross section in noise elimination chamber direction along air-flow.

18. air duct part according to claim 17, which is characterized in that first hollow chamber (510) has along gas Stream flows through the gradually smaller cross section in noise elimination chamber direction, also, second hollow chamber (521) has along air-flow Flow through the cross section that noise elimination chamber direction becomes larger.

19. air duct part according to claim 16, which is characterized in that first hollow chamber (510) and/or described Two hollow chamber (521) are in cone.

20. air duct part according to claim 16, which is characterized in that at least two hollow chamber further includes in third Plenum chamber (511), the third hollow chamber (511) are set to first hollow chamber (510) and second hollow cavity Between room (521) and it is connected to first hollow chamber (510) and second hollow chamber (521), the third hollow cavity Room (511) has iso-cross-section or variable cross-section.

21. air duct part according to claim 20, which is characterized in that the third hollow chamber (511) is cylinder.

22. air duct part according to claim 14, which is characterized in that the variable cross-section noise elimination structure (5) further includes perforation Plate (53), the perforated plate (53) are set to the exit of the noise elimination chamber.

23. air duct part according to claim 14, which is characterized in that the variable cross-section noise elimination structure (5) is set to described At the ducting outlet in air duct (10).

24. air duct part according to claim 14, which is characterized in that the noise elimination noise reduction structure further include be set to it is described Conducting element (6) in noise elimination chamber, the conducting element (6) include the diversion division (61) being rotatably arranged, the diversion division (61) Include at least two blades (611) being intervally installed around the pivot center of the diversion division (61), is flowing through the noise elimination Under the action of the air-flow of chamber, the diversion division (61) can rotate.

25. air duct part according to claim 24, which is characterized in that the direction of the noise elimination chamber is flowed through along air-flow, The cross-sectional area of the diversion division (61) becomes larger.

26. air duct part according to claim 25, which is characterized in that the maximum cross-section area of the diversion division (61) is more than Or it is located at the portion above the diversion division (61) equal to the direction for flowing through the noise elimination chamber along air-flow of the noise elimination chamber The smallest cross-section area divided.

27. air duct part according to claim 24, which is characterized in that the diversion division (61) is in cone or class circular cone Shape.

28. air duct part according to claim 24, which is characterized in that the conducting element (6) further includes support portion, described to lead Stream portion (61) is set on support portion, and is had between the support portion and the perforated plate (53) of the variable cross-section noise elimination structure (5) There is gap.

29. air duct part according to claim 24, which is characterized in that the conducting element (6) is set to the noise elimination chamber The second hollow chamber (521) in.

30. a kind of road cleaner, which is characterized in that include the air duct part as described in claim 1-29 is any.