CN207393584U - A kind of support base of the vacuum pump with noise-reducing structure - Google Patents

Abstract

The utility model discloses a kind of support bases of the vacuum pump with noise-reducing structure, including support base main body and silencing block, above the air outlet pipe of support base main body surge chamber has been opened up at corresponding position, silencing block is arranged in surge chamber, in surge chamber from inside to outside, from high to low successively be equipped with the first buffer table, the second buffer table and dashpot, a row is respectively provided with inside and outside the dashpot on cell wall and buffers protrusion, the buffering protrusion of both sides is staggered.Silencing block is equipped with air inlet, and gas-guide tube is equipped in the internal cavities of silencing block, and gas-guide tube is connected with air inlet, and the outlet of gas-guide tube is above the first buffer table of surge chamber.The gas flowed out from pump casing cover enters gas-guide tube from air inlet, after gas-guide tube outflow, enter the dashpot of bottom after the first buffer table, the second buffer table buffering, gas into dashpot needs to can be only achieved at gas outlet by curved gas circuit, finally flows out support base from air outlet pipe.

Description

A kind of support base of the vacuum pump with noise-reducing structure

Technical field

The utility model is related to a kind of auto electronic vacuum pumps, and in particular to a kind of branch of the vacuum pump with noise-reducing structure Support group seat.

Background technology

Auto electronic vacuum pump include motor assembly, support base, pump chamber lower cover, actuating sleeve, pump rotor, blade, pump chamber, Pump chamber upper cover, pump casing cover and fixed pin；The output shaft of pump chamber lower cover, actuating sleeve and pump rotor and motor assembly is coaxially set； Pump chamber lower cover is arranged on the lower section of pump chamber, and pump chamber upper cover is put in the top of pump chamber（With reference to Chinese patent literature CN103306979A, Application number 201310267734.1）.The operation logic of electronic vacuum pump is：Electrical power rotates, driving pump rotor rotation, pump Rotor blade is since centrifugal force acts on, and blade, which is thrown away, againsts pump chamber inner wall rotation, and blade will be between pump chamber and the upper and lower covers of pump chamber It is separated into sealed air chamber of different sizes, the air in the gas chamber of sealing is gradually compressed, and is finally arranged from pump chamber upper cover gas vent Go out, after the compressed gas after discharge enters the intracavitary buffering that pump chamber is formed with pump casing cover, discharged from the exhaust outlet of support base.It is existing During some vacuum pump works discharge compressed gas, noise is larger, driver when driving vehicle, often hear vehicle have an abnormal sound and with There is damage for vehicle, generate bad driving experience.

Currently in order to noise-reduction, common means are one acoustic elements of increase between pump chamber upper cover and pump casing cover, and The structure of pump casing cover is correspondingly improved；Air-flow is after acoustic element buffers, from support base after being buffered using pump casing cover Exhaust outlet discharge.

Such as applicant had developed a kind of noise reduction component of used in new energy vehicles electronic vacuum pump in 2014（Application number 201420507263.7 publication number CN204061189U）, including acoustic element and pump casing cover；Acoustic element includes noise reduction set and noise reduction Cover, noise reduction set are cylindrical shape, and silencer cover is arranged in the surface of cylinder's inboard wall of noise reduction set；Silencer cover open at one end one end is closed, and is disappeared The side end face that the end face of the open end of sound cover is covered with noise reduction is at grade；The open end of silencer cover is provided with as exhaust outlet Gap.The caping inner surface of the pump casing cover is equipped with boss and mounting wall, and boss is to set annular convex platform jaggy；Installation Wall is arranged on boss, and mounting wall is the annular wall equipped with inner fovea part；Acoustic element is sleeved on pump casing cover by one end that noise reduction covers On mounting wall, the opening direction of the silencer cover of acoustic element is identical with the opening direction of pump casing cover.During vacuum pump work, compressed gas It after the outflow of pump chamber upper cover, is flowed out after three-level cushion chamber from the exhaust pipe of support base, making an uproar during electronic vacuum pump work Sound declines apparent.

In view of air-flow discharged from the exhaust outlet of support base, therefore air-flow is entering the mistake of discharge support base Buffering can also be passed through in journey.

Chinese patent literature CN206175168U（Application number 201621168886.1）A kind of vacuum pump mount base is disclosed, The base body is cylinder, and the base body center is equipped with motor crankshaft hole, and the base body is equipped with band Flange air inlet, gas buffer room, gas vent, exhaust surge chamber, the base body top surface concave around motor crankshaft hole The gas buffer room for forming annular groove-shaped is fallen into, the air inlet is arranged on base body lateral surface and perpendicular to lateral surface, described Air inlet is connected with gas buffer room, and the exhaust being recessed inwardly is equipped between the gas buffer room and base body lateral surface Surge chamber, the gas vent are arranged on the bottom of exhaust surge chamber.Rubber silencing block is equipped in the exhaust surge chamber, it is described Rubber silencing block be equipped with venthole.Gas passes through two-stage after the air inlet of rubber silencing block enters in exhaust surge chamber It after the buffering of step, is finally flowed out from exhaust outlet, therefore air-flow only passes through first-level buffer.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of vacuum with noise-reducing structure of good muffling effect The support base of pump.

The technical solution for realizing the utility model aim is a kind of support base of the vacuum pump with noise-reducing structure, including Support base main body and silencing block have opened up surge chamber, silencing block above the air outlet pipe of support base main body at corresponding position It is arranged in surge chamber, gas outlet is equipped in surge chamber, gas outlet is connected with air outlet pipe.

In surge chamber from inside to outside, from high to low successively be equipped with the first buffer table, the second buffer table and dashpot, buffering A row is respectively provided with inside and outside slot on cell wall and buffers protrusion, the buffering protrusion of both sides is staggered.

Silencing block is equipped with air inlet, and gas-guide tube is equipped in the internal cavities of silencing block, and gas-guide tube is connected with air inlet, The outlet of gas-guide tube is above the first buffer table of surge chamber.

The gas outlet of the surge chamber is arranged on the outside of dashpot, two bufferings on the outside cell wall of dashpot Between protrusion.

Optionally, diversion trench is additionally provided on silencing block, diversion trench is kidney ellipsoid, and air inlet is located in diversion trench.

The utility model has positive effect：（1）The branch support group of the vacuum pump with noise-reducing structure of the utility model Seat adds silencing block, and the air inlet of silencing block is also the air inlet of support base（The air inlet into gas be from the pump housing The gas rather than the gas from inspiration outside vacuum pump for covering outflow）.Silencing block is provided with one in the lower section of each air inlet Gas-guide tube, from air inlet enter gas support base is entered by gas-guide tube water conservancy diversion surge chamber in, gas first passes through from up to down The buffering of two-stage buffer table is crossed, then support base is flowed out from gas outlet after buffering in the dashpot of bottom.

（2）The top of the silencing block of the support base of the vacuum pump with noise-reducing structure of the utility model is also provided with leading Chute, two air inlets are respectively positioned in diversion trench, and the gas that support base is flowed into from pump casing cover collects and buffers in diversion trench Afterwards, out of, air inlet enters support base surge chamber.

（3）It is staggeredly provided on the both sides cell wall of the dashpot of the bottom of the surge chamber of the support base of the utility model Protrusion, the gas into dashpot needs to can be only achieved at gas outlet by curved gas circuit, in this process to air-flow Buffer noise reduction.

Description of the drawings

Fig. 1 is the dimensional structure diagram of the support base of the utility model；

Fig. 2 is the dimensional structure diagram of support base main body；

Fig. 3 is the top view of Fig. 2；

Fig. 4 is that the silencing block in Fig. 1 overturns the dimensional structure diagram after 180 °；

Mark in above-mentioned attached drawing is as follows：

Support base main body 1, air outlet pipe 11；

Surge chamber 2, the first buffer table 21, the second buffer table 22, dashpot 23 buffer protrusion 23-1, gas outlet 24；

Silencing block 3, air inlet 31, gas-guide tube 32, diversion trench 33.

Specific embodiment

The description in the orientation of the utility model is carried out according to orientation shown in FIG. 1 namely direction up and down shown in FIG. 1 The direction up and down as described, the one side that will be close to motor shaft mounting hole are used as inside, will be far from motor shaft mounting hole One side is used as outside.

（Embodiment 1）

See Fig. 1 to Fig. 3, the support base of the vacuum pump with noise-reducing structure of the present embodiment includes support base main body 1 With silencing block 3, surge chamber 2 has been opened up at the corresponding position in the top of air outlet pipe 11 of support base main body 1, silencing block 3 is arranged on In surge chamber 2.

The center of the support base main body 1 is equipped with motor shaft mounting hole, including sealing ring, air inlet pipe, air outlet pipe 11st, air storing cavity, gas outlet, mounting bracket and installation set.Support base main body 1 is fixed by mounting bracket and installation set with motor assembly It is connected, pump casing cover is fixedly connected with support base main body 1.The mounting bracket is arranged on the both sides of support base main body 1.

Air inlet pipe is arranged on the outside of support base main body 1, and the outlet of air inlet pipe is communicated with air storing cavity.Air outlet pipe 11 is set In the outside of support base main body 1, outlet sheath is cased with outside air outlet pipe 11.（Said structure can be referring in detail to application number 201310267734.1 the Chinese patent literature of denomination of invention electronic vacuum pump for new energy vehicle brake vacuum booster）.Go out Tracheae 11 is connected with the gas outlet 24 in 1 surge chamber 2 of support base main body.

Surge chamber 2 is arranged on 11 top of air outlet pipe of support base main body 1.Surge chamber 2 is top opening, lower section（Except setting Beyond the part for putting gas outlet 24）The chamber of closing.In surge chamber 2 from inside to outside, from high to low successively be equipped with the first buffer table 21st, the second buffer table 22 and dashpot 23.The bottom surface of first buffer table 21, the second buffer table 22 and dashpot 23 forms three-level platform Rank.A row is respectively provided with inside and outside the dashpot 23 on cell wall and buffers protrusion 23-1, the buffering protrusion 23-1 friendships of both sides Mistake arrangement.Gas outlet 24 is equipped in surge chamber 2, gas outlet 24 is arranged on the outside of dashpot 23, positioned at the outside of dashpot 23 Between two buffering protrusion 23-1 on cell wall.Gas outlet 24 is connected with air outlet pipe 11.

See Fig. 1 and Fig. 4,3 inner hollow of silencing block, outer is stepped, the surrounding outer rim and surge chamber of silencing block 3 2 shape exactly matches.After 3 openend of silencing block is lowered into surge chamber 2, the upper surface of silencing block 3 and support base At grade, the surrounding edge of silencing block 3 is contacted with the surrounding outer surface of surge chamber 2 for the upper surface of main body 1.

Silencing block 3 is equipped with air inlet 31 and diversion trench 33, and diversion trench 33 is kidney ellipsoid, and air inlet 31 is located at diversion trench 33 It is interior.Cavity between air inlet 31 and the pump casing cover and pump chamber of vacuum pump is connected.Air guide is equipped in the internal cavities of silencing block 3 Pipe 32, gas-guide tube 32 are connected with air inlet 31.The outlet of gas-guide tube 32 is positioned at 21 top of the first buffer table of surge chamber 2.

During vacuum pump operation, from the gas that pump casing cover flows out after 33 water conservancy diversion of diversion trench and buffering, enter from air inlet 31 Gas-guide tube 32 after the outflow of gas-guide tube 32, enters the buffering of bottom after the first buffer table 21, the second buffer table 22 buffering Slot 23, the gas into dashpot 23 needs to can be only achieved at gas outlet 24 by curved gas circuit, finally from air outlet pipe 11 Flow out support base.Gas have passed through 33 first order of diversion trench buffering, 32 second level of gas-guide tube buffering, two-stage in support base The step third level buffers and the fourth stage of cushion chamber buffering.

Various embodiments above and application examples are to the explanation of specific embodiment of the present utility model rather than new to this practicality The limitation of type, person skilled in the relevant technique, can be in the case where not departing from the spirit and scope of the utility model It makes various conversion and variation obtains corresponding equivalent technical solution, therefore all equivalent technical solutions should return Enter the scope of patent protection of the utility model.

Claims (3)

1. a kind of support base of the vacuum pump with noise-reducing structure, including support base main body（1）And silencing block（3）, support Base body（1）Air outlet pipe（11）Top has opened up surge chamber at corresponding position（2）, silencing block（3）It is arranged on surge chamber （2）It is interior, surge chamber（2）It is interior to be equipped with gas outlet（24）, gas outlet（24）With air outlet pipe（11）It is connected, it is characterised in that：

Surge chamber（2）Inside from inside to outside, from high to low successively be equipped with the first buffer table（21）, the second buffer table（22）And dashpot （23）, in dashpot（23）Inside and outside a row be respectively provided on cell wall buffer protrusion（23-1）, the buffering protrusion of both sides （23-1）It is staggered；

Silencing block（3）Openend towards surge chamber（2）, silencing block（3）It is equipped with air inlet（31）, silencing block（3）Inside Gas-guide tube is equipped in cavity（32）, gas-guide tube（32）With air inlet（31）It is connected, gas-guide tube（32）Outlet be located at surge chamber （2）The first buffer table（21）Top.

2. the support base of the vacuum pump according to claim 1 with noise-reducing structure, it is characterised in that：Surge chamber（2） Gas outlet（24）It is arranged on dashpot（23）Outside, positioned at dashpot（23）Outside cell wall on two buffering protrusion （23-1）Between.

3. the support base of the vacuum pump according to claim 1 with noise-reducing structure, it is characterised in that：Silencing block（3） On be additionally provided with diversion trench（33）, air inlet（31）Positioned at diversion trench（33）It is interior.