CN206753855U - The noise-reducing structure and vavuum pump of a kind of vavuum pump - Google Patents

Abstract

The utility model discloses a kind of noise-reducing structure of vavuum pump, the vavuum pump includes pump group part and the pump accommodating chamber for accommodating the pump group part；Wherein, the noise-reducing structure includes sleeve, and the sleeve is arranged in the pump accommodating chamber, and the inner space of the pump accommodating chamber is separated into the first space and second space；Wherein, the gas outlet of the pump group part is located in first space, and the exhaust outlet of the pump accommodating chamber is located in the second space, and the side wall of the sleeve is provided with through hole, to connect first space and the second space.Due to through hole size for the volume of second space it is very small, therefore, second space forms resistant noise-reducing structure with the through hole, reflection and interference occur when sound wave is propagated wherein, reach noise elimination purpose so as to reduce acoustic energy so that noise-reducing structure of the present utility model can effectively reduce the noise of vavuum pump.The invention also discloses a kind of vavuum pump.

Description

The noise-reducing structure and vavuum pump of a kind of vavuum pump

Technical field

It the utility model is related to fluid machinery technical field, and in particular to a kind of noise-reducing structure of vavuum pump.This practicality is new Type further relates to a kind of vavuum pump.

Background technology

Vavuum pump inevitably results from noise in the process of running, has a negative impact to surrounding environment.With automobile Exemplified by brake boost electric vacuum pump, if effective noise reduction can not be carried out to it, the overall noise level of automobile will be caused to occupy It is high not under, so as to influence the quality of automobile.

Vavuum pump of the prior art, such as vane-type vacuum pump etc., muffler can be typically set, such as in Chinese patent Vavuum pump disclosed in document CN104131979A, muffler and preceding muffler are just provided with, to carry out noise reduction to vavuum pump. Nevertheless, still more generally there is the problem of noise is higher in the vavuum pump of prior art.

Therefore, the more preferable noise-reducing structure of noise reduction is sought for vavuum pump, further to reduce the noise level of vavuum pump, It is one of target that those skilled in the art is pursued all the time.

Utility model content

In view of above-mentioned present situation, main purpose of the present utility model is that the noise-reducing structure for providing a kind of vavuum pump and one kind are true Empty pump, the problem of to overcome the vacuum pump noise of prior art higher.

To reach above-mentioned purpose, the utility model takes following technical scheme：

According to of the present utility model in a first aspect, a kind of noise-reducing structure of vavuum pump, the vavuum pump include pump group part and For accommodating the pump accommodating chamber of the pump group part；Wherein, the noise-reducing structure includes sleeve, and the sleeve is arranged on described In pump accommodating chamber, the inner space of the pump accommodating chamber is separated into the first space and second space；Wherein, the pump group part Gas outlet is located in first space, and the exhaust outlet of the pump accommodating chamber is located in the second space, the sleeve Side wall is provided with through hole, to connect first space and the second space.

Preferably, the radial dimension of the sleeve is more than the radial dimension of the pump group part so that the pump group part quilt It is surrounded on the radially inner side of the sleeve；Or the radial dimension of the sleeve is less than or equal to the radial direction of the pump group part Size so that one end of the sleeve abuts an axial end of the pump group part.

Preferably, the outside wall surface of the sleeve is provided with multiple first convex tendons for radially outward protruding out, and the multiple the Diameter parallel of bearing of trend of one convex tendon in the outside wall surface with the sleeve or the axle relative to the sleeve Line tilts.

Preferably, the distance between at least one pair of first adjacent convex tendon is less than the radial projection chi of first convex tendon It is very little.

Preferably, in the assembled condition, the radial outer end of the multiple first convex tendon abuts the radial direction of the pump accommodating chamber Inwall.

Preferably, the first adjacent convex tendon misplaces arrangement in the longitudinal direction so that any one first convex tendon only has one end It is concordant with the end of the sleeve.

Preferably, the both ends of each first convex tendon are concordant with the end of the sleeve, are all provided with each first convex tendon There is the ventilation device of the first convex tendon both sides of insertion, the ventilation device on adjacent two the first convex tendons is in the length side of the first convex tendon Upwards away from each other.

Preferably, the ventilation device includes through hole, groove and/or breach.

Preferably, the inner radial wall of the pump accommodating chamber is provided with multiple second convex tendons protruded radially inward, is assembling Under state, first convex tendon is collectively forming labyrinth structure with second convex tendon.

Preferably, diameter parallel of the bearing of trend of first convex tendon and second convex tendon with the sleeve.

According to second aspect of the present utility model, a kind of vavuum pump, it includes foregoing noise-reducing structure.

For noise-reducing structure of the present utility model in specific works, the gas of pump group part pumping enters the by gas outlet first One space, then enter second space through the through hole in sleeve side wall, then discharged again via exhaust outlet, due to the chi of through hole Very little very small for the volume of second space, therefore, second space forms resistant noise-reducing structure with the through hole, and sound wave exists Reflection and interference occur when wherein being propagated, reaches noise elimination purpose so as to reduce acoustic energy so that of the present utility model to disappear Sound structure can effectively reduce the noise of vavuum pump.

Especially, the preferred scheme of noise-reducing structure of the present utility model can be by means of multiple first convex tendons or by means of more The cooperation of individual first convex tendon and multiple second convex tendons further forms noise-reducing structure, reaches so as to further reducing acoustic energy and disappears Sound purpose.

Brief description of the drawings

Fig. 1 is the outline structural diagram according to the vavuum pump of preferred embodiment of the present utility model；

Fig. 2 is schematic top plan view of Fig. 1 vavuum pump after end cap is removed, and shows a kind of noise reduction of preferred embodiment Structure；

Fig. 3 is the outline structural diagram of the sleeve in Fig. 2；

Fig. 4 is schematic top plan view of Fig. 1 vavuum pump after end cap is removed, and shows disappearing for another preferred embodiment Sound structure；

Fig. 5 is the outline structural diagram of the sleeve in Fig. 4；

Fig. 6 is the contour structures signal of the sleeve in the noise-reducing structure of another preferred embodiment of the present utility model Figure；

Fig. 7 is the operation principle schematic diagram of Fig. 6 sleeve.

Embodiment

Hereinafter with reference to accompanying drawing to the noise-reducing structure according to vavuum pump of the present utility model and the side of being preferable to carry out of vavuum pump Formula is described.

Vavuum pump involved by the utility model includes pump group part and the pump accommodating chamber for accommodating the pump group part.Its In, pump group part can use any suitable construction of the prior art, such as can use in patent document CN 104131979A The structure of the pump chamber of disclosed vavuum pump, other structures can also be used, as long as pumping function can be completed.

Equally, the general structure of vavuum pump of the present utility model can also use any suitable knot of the prior art Structure, such as the general structure of the vavuum pump disclosed in patent document CN104131979A can be used, i.e. electricity can be included Machine, installing plate and silencer cover, wherein, motor is installed on the side of installing plate, and pump group part is installed on the opposite side of installing plate, noise reduction Pump group part is encapsulated to cover can-like, that is, pump accommodating chamber is provided by silencer cover.

Preferably, the general structure of vavuum pump of the present utility model can be as shown in Figure 1.As seen from the figure, the utility model Vavuum pump generally comprise：Electric machine casing 3, pump seat 2 and end cap 1.Wherein, electric machine assembly (not shown) is installed on the motor In housing 3, the electric machine assembly is fixed to the pump seat 2 by the electric machine casing 3, and the pump seat 2 limits pump accommodating chamber, pump Component 5 is arranged on (referring to Fig. 2, Fig. 4) in the pump accommodating chamber, and the motor shaft of the electric machine assembly stretches into the pump accommodating chamber In, to engage the pump group part 5, the end cap 1 closes the pump accommodating chamber, i.e. end cap 1 is fixed to the opening of pump seat 2.

Vavuum pump noise-reducing structure of the present utility model is applied to the vavuum pump of above-mentioned various structures.As illustrated in figs. 2-7, this reality Include sleeve 6,7,8 with new noise-reducing structure, the sleeve 6,7,8 is arranged in the pump accommodating chamber, by the pump The inner space of accommodating chamber is separated into two parts, i.e. positioned at the first space of the inner side of sleeve 6,7,8 and positioned at sleeve 6, 7th, the second space in 8 outsides, wherein, the gas outlet 501 of the pump group part 5 is located in first space, the pump accommodating chamber Exhaust outlet 201 it is (shown in Figure 7, for the blast pipe 4 shown in connection figure 1) in the second space, the shell-like The side wall of part 6,7,8 is provided with through hole 601,701,801, to connect first space and the second space.It is readily appreciated that , in the assembled condition, the both ends of sleeve 6,7,8 are preferably in sealing state, that is, first space and described Preferably only keep connecting by the through hole 601,701,801 between second space.

In specific works, the gas that pump group part 5 pumps enters the first space by gas outlet 501 first, then through logical Hole 601,701,801 enters second space, is then discharged again via exhaust outlet 201 and blast pipe 4, such as the arrow line institute in Fig. 7 Show.Due to through hole size for the volume of second space it is very small, therefore, second space and the through hole form resistance Noise-reducing structures, reflection and interference occur when sound wave is propagated wherein, reaches noise elimination purpose so as to reduce acoustic energy so that Noise-reducing structure of the present utility model can effectively reduce the noise of vavuum pump.

Preferably, as shown in Figure 2 and Figure 4, the radial dimension of the sleeve 6,7 is more than the radial ruler of the pump group part 5 It is very little so that the pump group part 5 is enclosed in the radially inner side of the sleeve 6,7.That is, pump group part 5 is similarly positioned in the first sky In.

Because the radial dimension of sleeve is more than the radial dimension of pump group part, the shape of cross section of sleeve preferably can be with The shape of cross section of pump group part is adapted, consequently facilitating being carried out in itself to sleeve circumferentially positioned, prevents sleeve from occurring in itself Radial displacement and/or circumferentially rotate.For example, as shown in Figure 2 and Figure 4, the outer peripheral face of pump group part has multiple project radially outward Position, sleeve 6,7 also correspondingly have it is multiple corresponding to the positions that project radially outward, to accommodate the corresponding of pump group part The position of protrusion.Certainly, the shape of cross section of sleeve is also feasible using simple shapes such as annulars.

Alternatively, as shown in fig. 7, the radial dimension of the sleeve 8 might be less that or the footpath equal to the pump group part 5 To size so that one end of the sleeve 8 abuts an axial end of the pump group part 5, and can not surround pump group part 5 In in sleeve.

In this case, the shape of cross section of sleeve 8 can use any shape, it is preferred to use annular etc. is simple Shape, as shown in fig. 6, so as to simplify its manufacturing process.Meanwhile in order to prevent sleeve 8 itself from radial displacement, Ke Yi occurs Location structure is set in pump accommodating chamber, to be positioned to sleeve 8, for example, as shown in fig. 7, being set on the medial surface of end cap 1 Locating ring 101 is equipped with, the one end and locating ring 101 for making sleeve 8 coordinate.

Preferably, as shown in Figure 2-5, the outside wall surface of the sleeve 6,7 is provided with multiple first radially outward protruded out Convex tendon 602,702, bearing of trend of the multiple first convex tendon 602,702 in the outside wall surface of the sleeve 6,7 preferably with The diameter parallel of the sleeve 6,7, or the axis inclination relative to the sleeve 6,7, for example, helical wire form.

It is easily understood that in embodiment shown in Fig. 6 and Fig. 7, footpath can be equally set in the outside wall surface of sleeve 8 To the multiple first convex tendon (not shown) protruded outward.

Because each first convex tendon is arranged in the outside wall surface of sleeve, therefore, in the assembled condition, these the first convex tendon positions In in second space, i.e., in foregoing resistant noise-reducing structure.

Preferably, the distance between at least one pair of first adjacent convex tendon is less than the radial projection chi of first convex tendon It is very little, so that forming narrower channel-shaped space between corresponding first convex tendon.Preferably, as shown in Figure 2 and Figure 4, can cover Multigroup first convex tendon is set on the circumferencial direction of shape part, wherein, in every group of first convex tendon between all the first adjacent convex tendons The radial projection size of distance respectively less than the first convex tendon, so as to farthest play the effect of the first convex tendon.

The first above-mentioned convex tendon can play a variety of different sound deadenings.

For example, sound-absorbing material can be filled between these first convex tendons reaches noise elimination purpose to absorb acoustic energy, so as to Forming local resistive noise-reducing structure so that noise-reducing structure of the present utility model has the characteristic of resistant noise-reducing and resistive noise reduction concurrently, That is, impedance composite noise-reducing structure is formed.

For another example by setting suitably sized and/or collocation form for these first convex tendons, these can be made first convex Muscle further forms local resistant noise-reducing structure.

Preferably, as shown in Figures 2 and 3, in the assembled condition, the radial outer end of the multiple first convex tendon 602 abuts The inner radial wall of the pump accommodating chamber, in the illustrated embodiment, the radial outer end of each first convex tendon 602 abut pump seat 2 Inner radial wall.

Because the radial outer end of each first convex tendon 602 abuts the inner radial wall of pump seat 2, i.e. the radial direction of each first convex tendon 602 It is seamless between the inner radial wall of outer end and pump seat 2 so that air-flow can not bypass the radial outer end of each first convex tendon 602, and only It can be flowed in the channel-shaped space between the first adjacent convex tendon 602, it is possible thereby to be obviously prolonged air-flow in second space Flow path, make sound wave that reflection and interference occur when propagating, reduce acoustic energy, while the flow velocity and pressure of air-flow can also be reduced Power, so as to reach noise reduction purpose.

Preferably, as shown in figure 3, adjacent first convex tendon 602 in length direction (in the preferred embodiment illustrated, Axis direction of the length direction of first convex tendon 602 parallel to sleeve 6) on misplace arrangement so that any one first convex tendon 602 Only one end is concordant with an end of the sleeve 6, and the other end then bounces back necessarily relative to the other end of sleeve 6 Distance, also, the end of the retraction of the first adjacent convex tendon 602 is located at the opposite end of sleeve 6.So, in confined state Under, air-flow can bypass the opposite end (end to bounce back) of each the first adjacent convex tendon and sequentially flow through each to adjacent the Channel-shaped space between one convex tendon, so that flow path of the air-flow in second space reaches most long.

Alternatively, (not shown) in another embodiment, the both ends of each first convex tendon can also be arranged to The end of the sleeve 6 is concordant, meanwhile, the ventilation device for penetrating the first convex tendon both sides is equipped with each first convex tendon, And the ventilation device on two adjacent the first convex tendons on the length direction of the first convex tendon away from each other, for example, respectively close to The both ends of sleeve 6.So, air-flow can be flow to via the ventilation device in adjacent channel-shaped space, so that equally can be suitable It is secondary to flow through each channel-shaped space between the first adjacent convex tendon, reach most so as to obtain flow path of the air-flow in second space It is long.

Preferably, the ventilation device can be provided in through hole or groove inside each first convex tendon, or set Put the breach at each first convex tendon edge, naturally it is also possible to be other appropriate structures.

Preferably, as shown in Figure 4 and Figure 5, in this embodiment, multiple first convex tendons in the outside wall surface of sleeve 7 702 radial outer end need not abut the inner radial wall of the pump accommodating chamber, and each first convex tendon 702 is also without in length Dislocation arrangement or setting ventilation device on direction, but can be provided with the inner radial wall of the pump accommodating chamber radially-inwardly convex Multiple second convex tendons 202 stretched so that in the assembled condition, first convex tendon 702 is collectively forming with second convex tendon 202 Labyrinth structure.

As shown in figure 4, the first channel-shaped space is formed between the first adjacent convex tendon 702, between the second adjacent convex tendon 202 The second channel-shaped space is formed, in the assembled condition, each convex tendon 202 of first convex tendon 702 and second projects to the channel-shaped of other side respectively In space, and it is not in contact each other, so as to form labyrinth structure so that air-flow can be sequentially convex around each first The radial edges of muscle and the second convex tendon, are flowed in the form of walking labyrinth in second space, can equally extend the flowing of air-flow Path, make sound wave that reflection and interference occur when propagating, reduce acoustic energy, while the flow velocity and pressure of air-flow can also be reduced, So as to reach noise reduction purpose.

Preferably, for the ease of being assembled, in present embodiment, first convex tendon 702 and second convex tendon 202 Diameter parallel of the bearing of trend with the sleeve 7, can be easily by sleeve 7 along axle so as to when being assembled Line direction is fitted into pump accommodating chamber.

According to second aspect of the present utility model, a kind of vavuum pump is additionally provided, it is noted earlier that it includes the utility model Noise-reducing structure.

Especially, vavuum pump of the present utility model is using the structure shown in Fig. 1, i.e. including electric machine casing 3, pump seat 2 and end Lid 1.This structure is particularly conducive to the assembling of noise-reducing structure of the present utility model.For example, when being assembled, can be first by pump Component is fixed in pump accommodating chamber, then assembles corresponding sleeve, finally reassembles end cap 1.Before end cap 1 is assembled, pump Structure in accommodating chamber is visible state, therefore easily can be adapted to sleeve with pump group part, in the presence of second In the case of convex tendon, also the first convex tendon and the second convex tendon easily can be subjected to coordination alignment, avoid the two from interfering or connect Touch.

Vavuum pump of the present utility model can be used for various occasions, be especially suitable for automobile brake power-assisted Motorized vacuum Pump.

For those skilled in the art it is easily understood that on the premise of not conflicting, above-mentioned each preferred scheme can be free Ground combination, superposition.

It should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, without departing from of the present utility model In the case of general principle, those skilled in the art can be directed to the various obvious or equivalent modification that above-mentioned details is made Or replace, all it is included in right of the present utility model.

Claims (10)

1. a kind of noise-reducing structure of vavuum pump, the vavuum pump includes pump group part and the pump for accommodating the pump group part accommodates Chamber；Characterized in that, the noise-reducing structure includes sleeve, the sleeve is arranged in the pump accommodating chamber, by the pump The inner space of accommodating chamber is separated into the first space and second space；Wherein, the gas outlet of the pump group part is located at described first In space, the exhaust outlet of the pump accommodating chamber is located in the second space, and the side wall of the sleeve is provided with through hole, with even Lead to first space and the second space.

2. noise-reducing structure according to claim 1, it is characterised in that the radial dimension of the sleeve is more than the pump group The radial dimension of part so that the pump group part is enclosed in the radially inner side of the sleeve；Or the radial direction of the sleeve Size is less than or equal to the radial dimension of the pump group part so that one end of the sleeve abuts an axial direction of the pump group part End face.

3. noise-reducing structure according to claim 1, it is characterised in that the outside wall surface of the sleeve is provided with radially outward Multiple first convex tendons protruded out, bearing of trend of the multiple first convex tendon in the outside wall surface and the axis of the sleeve Parallel or relative to the sleeve axis tilts.

4. noise-reducing structure according to claim 3, it is characterised in that in the assembled condition, the multiple first convex tendon Radial outer end abuts the inner radial wall of the pump accommodating chamber.

5. noise-reducing structure according to claim 4, it is characterised in that the first adjacent convex tendon misplaces cloth in the longitudinal direction Put so that it is concordant with the end of the sleeve that any one first convex tendon only has one end.

6. noise-reducing structure according to claim 4, it is characterised in that the both ends of each first convex tendon with the sleeve End it is concordant, be equipped with each first convex tendon insertion the first convex tendon both sides ventilation device, adjacent two the first convex tendons On ventilation device on the length direction of the first convex tendon away from each other.

7. noise-reducing structure according to claim 6, it is characterised in that the ventilation device includes through hole, groove and/or lacked Mouthful.

8. noise-reducing structure according to claim 3, it is characterised in that the inner radial wall of the pump accommodating chamber is provided with radially Multiple second convex tendons inwardly protruded out, in the assembled condition, first convex tendon are collectively forming labyrinth knot with second convex tendon Structure.

9. noise-reducing structure according to claim 8, it is characterised in that the extension of first convex tendon and second convex tendon Diameter parallel of the direction with the sleeve.

10. a kind of vavuum pump, it is characterised in that including the noise-reducing structure according to one of claim 1-9.