CN208546307U - The vacuum pump field frame assembly of high gettering efficiency - Google Patents

Abstract

The utility model provides the vacuum pump field frame assembly of high gettering efficiency, belong to field of vacuum, including stator, rotor and blade, rotor is located at the inside of stator and the two is not coaxially disposed, the inner surface of stator is equipped with vacuum ionic coating, multiple locating slots are evenly equipped on rotor, blade is located in locating slot and the two is slidably connected, blade is semicircle close to one end of stator inner wall, blade is integrally formed by graphite material, the lower end of stator is equipped with lower cover, upper end is equipped with upper end cover, lower cover, stator and upper end cap via screw rod are fixedly connected, lower cover is equipped with air inlet, upper end cover is equipped with venthole.The utility model inspiratory capacity increases, and improves efficiency, when the gas of same volume, consequently reduces the time of single work.

Description

The vacuum pump field frame assembly of high gettering efficiency

Technical field

The utility model belongs to auto parts field, is related to the vacuum pump of a kind of vacuum pump more particularly to high gettering efficiency Use field frame assembly.

Background technique

With the rapid development of economy, automobile using more and more extensive, modern vehicle mostly uses vacuum booster to make greatly For the auxiliary power-assisted mode of braking system, vacuum booster is communicated by check valve with motor intake manifold, engine operating When, negative pressure is generated, and then form pressure difference at booster diaphragm both ends, to reach the work for mitigating brake pedal operation power With the size of vacuum power directly affects braking effect, and vacuum degree plays a significant role braking system, and vacuum pump is to answer at present With most commonly used vacuum booster.

Vacuum pump, which refers to, to be obtained using machinery, physics, chemically or physically chemical method to being evacuated by pumping container The device or equipment of vacuum, i.e. vacuum pump are to be improved in a certain enclosure space with various methods, generate and maintain the dress of vacuum It sets, forms the variation by rotation generation volume in pump chamber for outside gas discharge pump, mainly in breathing process, air-breathing Cavity volume increases, and vacuum degree reduces, and gas in container is sucked pump chamber, and volume becomes smaller in exhaust process, and pressure increases, finally It will be outside the gas discharge pump of sucking by oil sealing.

During vacuum pump operating, due to following three, very big noise, graphite vanes and metal can be generated Stator friction；The noise that gas is generated by muffler；The friction that motor rotation and carbon brush generate, the generation of noise is to vacuum pump Application environment can generate direct influence, uncomfortable feeling is caused to user, therefore noise is to measure vacuum pump performance Important parameter, noise reduction are a directions of vacuum pump sustained improvement.

Utility model content

Problem to be solved in the utility model is to be to provide the vacuum pump field frame assembly of high gettering efficiency, and blade is leaned on One end of nearly stator inner wall is arranged to semicircle, reduces contact area between the two, thereby reduces noise.

In order to solve the above technical problems, the technical solution adopted in the utility model is: the vacuum pump of high gettering efficiency is used fixed Sub- assembly, including stator, rotor and blade, the rotor is located at the inside of the stator and the two is not coaxially disposed, and described turn Multiple locating slots are evenly equipped on son, the blade is located in the locating slot and the two is slidably connected, and the lower end of the stator is set There is lower cover, upper end is equipped with upper end cover, and the lower cover, stator and upper end cap via screw rod are fixedly connected, the lower end It covers and is equipped with air inlet, the upper end cover is equipped with venthole, and the outer ring of the stator is circle, and the inner ring of the stator includes First circular arc, the second circular arc and third circular arc, first circular arc and the third circular arc are by the second circular sliding slopes, and described the One circular arc is not coaxially disposed with the rotor, the center of circle of first circular arc be located at second circular arc the center of circle and the rotor The center of circle between.

Further, the bottom of the locating slot is equipped with the first fillet, and the blade positions the one of trench bottom close to described Side is equipped with the second fillet, and the radius of second fillet is less than the radius of first fillet.

Further, the rotor side adjacent with the blade is equipped with guide groove, is installed with rotation on the blade The guide roller of connection, the guide roller is located in the guide groove and the tangent setting of the two.

Further, the inner surface of the stator is equipped with vacuum ionic coating, and the blade is integrally formed by graphite material, The blade is semicircle close to one end of the stator inner wall.

Further, segmental arc where the stator thickness of segmental arc where the third circular arc is less than first circular arc Stator thickness, the stator of segmental arc is thick where the stator thickness of segmental arc is equal to first circular arc where second circular arc Degree.

Further, the arc length of first circular arc accounts for the 3/5~4/5 of the stator inner ring arc.

Compared with prior art, the utility model has the advantages and positive effects of: 1, the utility model by adjusting The thickness of stator realizes the increase of volume, avoids whole abnormity, ensure that the beauty of shape, while reducing the difficulty of processing, The cost of part is reduced, because the chamber among stator is ellipse, air-breathing when, corresponding air-breathing volume was increased by , so under the same revolving speed, inspiratory capacity of this design be will increase, which improves efficiency, when the gas of same volume, Just reduce the time of single work accordingly；2, the radius of the second fillet avoids blade and exists less than the radius of the first fillet There is vacuum state between locating slot when being moved to positioning trench bottom, leads to the bad separation of blade, relative motion is unsmooth The case where occur, ensure that the stable operation of structure；It 3, will be between original blade and rotor after guide roller and guide groove are set Face contact and face friction be converted to guide roller and guide groove point contact, what is both greatly reduced under relative motion state rubs Power is wiped, the noise of relative motion generation is thereby reduced；4, set semicircle close to one end of stator inner wall for blade, significantly The frictional force between blade and stator inner wall is reduced, and intensity is larger, stability is good, reduces making an uproar for relative motion generation Sound, while vacuum ionic coating is set in the inner wall of stator, the slip resistance and thermal diffusivity of stator are improved, guarantees structure heat dissipation Meanwhile authorization is improved, while reducing coefficient of friction, it further reduced noise.

Detailed description of the invention

The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.? In attached drawing:

Fig. 1 is the structural schematic diagram of the vacuum pump field frame assembly of the high gettering efficiency of the utility model；

Fig. 2 is the portion the A detail drawing of the utility model Fig. 1；

Fig. 3 is the cross-section diagram of the utility model blade and rotor engagement；

Fig. 4 is the structural schematic diagram of the utility model stator.

Appended drawing reference:

31- stator；The first circular arc of 311-；The second circular arc of 312-；313- third circular arc；32- rotor；321- locating slot； The first fillet of 322-；323- guide groove；33- blade；The second fillet of 331-；333- guide roller；34- lower cover；341- air inlet Hole；35- upper end cover；351- venthole.

Specific embodiment

It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can To be combined with each other.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower", The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result, Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another It is described, the meaning of " plurality " is two or more.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition State the concrete meaning of term in the present invention.

It elaborates with reference to the accompanying drawing to specific embodiment of the utility model.

As shown in Figure 1, Figure 2 and Figure 3, the utility model is the vacuum pump field frame assembly of high gettering efficiency, including stator 31, rotor 32 and blade 33, rotor 32 is located at the inside of stator and the two is not coaxially disposed, and the inner surface of stator 31 is equipped with vacuum Ion plating is evenly equipped with multiple locating slots 321 on rotor 32, and blade 33 is located in locating slot 321 and the two is slidably connected, blade 33 close to one end of 31 inner wall of stator be semicircle, and blade 33 is integrally formed by graphite material, and the lower end of stator 31 is equipped with lower end Lid 34, upper end are equipped with upper end cover 35, and lower cover 34, stator and upper end cover 35 are fixedly connected by screw rod, on lower cover 34 Equipped with air inlet 341, upper end cover 35 is equipped with venthole 351.

Preferably, the bottom of locating slot 321 is equipped with the first fillet 322, and blade 33 is set close to the side of 321 bottom of locating slot There is the second fillet 331, the radius of the second fillet 331 avoids blade 33 and be moved to positioning less than the radius of the first fillet 322 There is vacuum state between locating slot 321 when 321 bottom of slot, lead to the bad separation of blade 33, relative motion is unsmooth It happens, ensure that the stable operation of structure.

Preferably, it as shown in figure 3, the side adjacent with blade 33 of rotor 32 is equipped with guide groove 323, is installed on blade 33 The guide roller 333 of rotation connection, guide roller 333 is located in guide groove 323 and the tangent setting of the two, and guide roller is arranged 333 and guide groove 323 after, by between original blade 33 and rotor 32 face contact and face friction be converted to guide roller 333 and 323 point contact of guide groove greatly reduces the frictional force of the two under relative motion state, thereby reduces relative motion generation Noise.

Preferably, as shown in figure 4, the outer ring of stator 31 is circle, the inner ring of stator 31 includes the first circular arc 311, second Circular arc 312 and third circular arc 313, the first circular arc 311 are connect with third circular arc 313 by the second circular arc 312, the first circular arc 311 It not being coaxially disposed with rotor, the center of circle of the first circular arc 311 is located between the center of circle of the second circular arc 312 and the center of circle of rotor 33, The volume for increasing air, promotes the efficiency vacuumized, because the chamber among stator is ellipse, air-breathing when is corresponding Air-breathing volume increases, so the inspiratory capacity of this design will increase, and which improves efficiency, together under the same revolving speed When the gas of sample volume, just reduce the time of single work accordingly.

Preferably, 31 thickness of stator of 313 place segmental arc of third circular arc is determined less than 311 place segmental arc of the first circular arc Sub 31 thickness, the stator 31 that 31 thickness of stator of segmental arc where the second circular arc is equal to 311 place segmental arc of the first circular arc are thick Degree realizes the increase of volume by adjusting the thickness of stator 31, avoids whole abnormity, ensure that the beauty of shape, reduce simultaneously The difficulty of processing, reduces the cost of part；It is highly preferred that the arc length of the first circular arc 311 accounts for the 3/5 of 31 inner ring arc of stator ~4/5, guarantee the tangent setting of rotor 33 and the first circular arc, guarantees the smoothness of cooperation.

Preferably, the height of rotor 32 lower than stator 31 height distance be 0.03~0.08mm, preferably 0.05mm, The height for increasing stator 31 to greatest extent on this basis, increases air-breathing volume, improves the efficiency of air-breathing.

Preferably, air inlet 341 and venthole 351 are arc-shaped through-hole, and the sectional area of air inlet 341 is greater than venthole 351 sectional area, gas output are less than air inflow, can reduce the speed of outlet to a certain extent, reduce the generation of noise, this Structure matches oblique sliding of the hing straps 33 in guide groove 323, and the further expansion difference of air inlet and gas output further drops Low noise.

In practical work process, under the action of vaccum pump motor, rotor 32 and motor solid lock, rotor 32 ceaselessly exist The internal rotating of stator 31, blade 33 and the inner wall of positioning are in contact condition during rotation, since rotor 32 is in stator It is eccentric setting inside 31, therefore during rotation, blade 33 is relative to rotor 32 constantly in extending and retracting State, since the front end of blade 33 is semicircle, friction is small with stator interior, and since width is equal to rounding The diameter at angle, arc-shaped structure are not in problem of stress concentration, and intensity is high, and stability is good, and gas is sucked from air inlet 341, Then it is discharged by venthole 351, the movement for inhaling vacuum is completed, due to the setting of third circular arc 313, the circle of third circular arc 313 Segmental arc space is larger, therefore allows access into more gases, promotes the efficiency vacuumized, while the guide roller 333 being arranged, into One step reduces the friction between blade 33 and rotor 32, further reduced friction noise, and total is carried out from multiple points Noise reduction is designed, effect is good.

One embodiment of the utility model is described in detail above, but the content is only the utility model Preferred embodiment should not be considered as limiting the scope of the present invention.It is all to be made according to application scope of the utility model All the changes and improvements etc., should still belong within the patent covering scope of the utility model.

Claims (6)

1. the vacuum pump field frame assembly of high gettering efficiency, it is characterised in that: including stator, rotor and blade, the rotor is set The stator inside and the two be not coaxially disposed, be evenly equipped with multiple locating slots on the rotor, the blade is located at described In locating slot and the two is slidably connected, and the lower end of the stator is equipped with lower cover, and upper end is equipped with upper end cover, and the lower cover is determined Son and upper end cap via screw rod are fixedly connected, and the lower cover is equipped with air inlet, and the upper end cover is equipped with venthole, The outer ring of the stator is circle, and the inner ring of the stator includes the first circular arc, the second circular arc and third circular arc, first circle By the second circular sliding slopes, first circular arc is not coaxially disposed with the rotor for arc and the third circular arc, first circle The center of circle of arc is located between the center of circle of second circular arc and the center of circle of the rotor.

2. the vacuum pump field frame assembly of high gettering efficiency according to claim 1, it is characterised in that: the locating slot Bottom is equipped with the first fillet, and the blade is equipped with the second fillet close to the side of the positioning trench bottom, second fillet Radius is less than the radius of first fillet.

3. the vacuum pump field frame assembly of high gettering efficiency according to claim 1, it is characterised in that: the rotor and institute It states the adjacent side of blade and is equipped with guide groove, the guide roller of rotation connection is installed on the blade, the guide roller is set In the guide groove and the tangent setting of the two.

4. the vacuum pump field frame assembly of high gettering efficiency according to claim 1, it is characterised in that: the stator it is interior Surface is equipped with vacuum ionic coating, and the blade is integrally formed by graphite material, the blade close to the stator inner wall one End is semicircle.

5. the vacuum pump field frame assembly of high gettering efficiency according to claim 4, it is characterised in that: the third circular arc The stator thickness of segmental arc where the stator thickness of place segmental arc is less than first circular arc, arc where second circular arc The stator thickness of segmental arc where the stator thickness of section is equal to first circular arc.

6. the vacuum pump field frame assembly of high gettering efficiency according to claim 4, it is characterised in that: first circular arc Arc length account for the 3/5~4/5 of the stator inner ring arc.