CN104131979A - Vacuum pump - Google Patents
Vacuum pump Download PDFInfo
- Publication number
- CN104131979A CN104131979A CN201410166531.8A CN201410166531A CN104131979A CN 104131979 A CN104131979 A CN 104131979A CN 201410166531 A CN201410166531 A CN 201410166531A CN 104131979 A CN104131979 A CN 104131979A
- Authority
- CN
- China
- Prior art keywords
- vacuum pump
- pump
- cover plate
- vibrating valve
- rotor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/06—Silencing
- F04C29/065—Noise dampening volumes, e.g. muffler chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
- F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
- F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
- F04C29/128—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type of the elastic type, e.g. reed valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
- F01C21/104—Stators; Members defining the outer boundaries of the working chamber
- F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a vacuum pump, including a pump cavity (2) in which a rotor (3) is rotatably supported and which is closed by virtue of a cover plate (2c); an electric motor (5) used for driving the rotor (3); an exhausting part equipped with at least one vibration valve (12); and an air inlet connecting pipe (9) for being operatively connected with an air inlet passage. The vacuum pump (1) should be so improved that when the pump is turned off, air can flow back to the pump cavity in a slower manner, and the vacuum pump can be manufactured in a simple manner and at low cost. The vacuum pump is realized through the following method: the vibration valves (12) have gaps in a region of gas vents (11) to be sealed, and the gaps are closed by virtue of a porous film (14).
Description
Technical field
The present invention relates to a kind of vacuum pump, it comprises: pump chamber, and rotatably mounted in this pump chamber have rotor and this pump chamber by covering palte seal; For driving the electric motor of rotor; Discharge portion, this discharge portion disposes at least one vibrating valve; And air inlet tube, this air inlet tube is connected with gas-entered passageway effect.
Background technique
This vacuum pump is known by the type of for example vane pump.Vacuum pump for delivery of gas and for example in Motor Vehicle with acting on the vacuum pump of engine management device and/or braking force amplifying device.
Once shutoff vacuum pump, the just negative pressure based on setting up in pump chamber and being back in vacuum pump by air discharge portion of ambient air.This backflow of air can cause undesired effect, be entrained in pump chamber as particle or drop.Can avoid the backflow of air in the time that vacuum pump turn-offs by using known vibrating valve.But strengthen thus the difficulty of pump ventilation and strengthen thus cooling difficulty.
WO2011/023448A1 has described a kind of negative pressure pump, is parallel with valve and pressure compensation element before this negative pressure pump, on the pressure side.This pressure compensation element should prevent that particle from entering into pump and being for example configured to film.The structure of valve and pressure compensation element is complicated with structure is set.
By DE4239575C2 known a kind of baffler for vane pump, this baffler is divided into two parts.A partial configuration configures the exhaust side to this pump to suction side and another part of pump.In described another part, be provided with sieves, to make the particle producing away from responsive customer in the time producing.The protection of not mentioned pump.
Summary of the invention
The object of the invention is to: a kind of vacuum pump is provided, and in the time that pump turn-offs, air can slow down and is back in pump chamber therein, and this vacuum pump can simply and at low cost be manufactured.
This object is achieved by the feature of claim 1.Vibrating valve has breach in exhaust port region to be sealed, and this breach is by the membrane closure of porous.Once vacuum pump turn-offs thus, exhaust port is just sealed by vibrating valve.A small amount of air stream flows through based on pore and the faint ventilative film of energy, and described air stream only allows lentamente, for example within half a minute, between atmosphere and pump chamber, carries out pressure compensation.The porosity of corresponding selective membrane.In the time that vacuum pump turn-offs, air stream also causes the cooling of vacuum pump except thermal radiation; In addition can reliably prevent that dirt is along with air stream enters into vacuum pump via discharge portion.
Dependent claims relates to favourable scheme of the present invention.
In a kind of scheme, vibrating valve be configured to ligule and fixing on the cover board.The structure that arranges at this vibrating valve can be without the quantity of surcharge land used coupling exhaust port.
As alternative, vibrating valve is configured on sheet ring, and this sheet ring clamps and remains between cover plate and front baffler.Without in addition fixing vibrating valve, greatly simplify thus the assembling of vacuum pump at this.
In another kind of scheme, the elastic part of vibrating valve is made up of spring steel.This ensures the reliable sealing of exhaust port and the high durability of vibrating valve.
In another kind of scheme, described film is made up of ePTFE (expanded PTFE).This has high chemistry and mechanical stability.
Brief description of the drawings
Describe the present invention in detail by accompanying drawing below.In accompanying drawing:
Fig. 1 is the exploded view of the vacuum pump of the first example;
Fig. 2 decomposition illustrates that the cover plate with sheet ring and front baffler is as the detailed drawing of the first example;
Fig. 3 is the vertical sectional view of the cover plate with sheet ring and front baffler of Fig. 2; With
Fig. 4 is the exploded view with the cover plate of the vibrating valve of the second example.
Embodiment
Example 1
From Fig. 1 to 3, vacuum pump 1, in this case vane pump comprises pump chamber 2, and rotatably mounted in this pump chamber have a rotor 3.In rotor 3, as conventionally, be provided with movably slide plate 4.Rotor 3 can drive by electric motor 5, and this electric motor is fixed on mounting plate 6.Motor 5 is surrounded and is connected on conjunction cable 7 by housing at this.
Pump chamber 2 is by have base plate 2a, the pump ring 2b of groove shape suction port and cover plate 2c forms and be connected with air inlet tube 8 by gas-entered passageway and be connected with vent connection 10 by baffler 9 in flow technique in flow technique.Vent connection 10, baffler 9 and form the discharge portion of vacuum pump 1 at these two exhaust ports 11 that are arranged on the perforation in cover plate 2c.Base plate 2a is arranged in that side contrary with motor 5 on mounting plate 6.
Each exhaust port 11 disposes a vibrating valve 12.Described vibrating valve 12 is configured on sheet ring 13 at this, and this sheet ring lies on cover plate 2c in outside.Sheet ring 13 is ring in plan view, and vibrating valve 12 is one-body molded as radially inward-pointing contact pin.Each contact pin has the opening of internal run-through, and therefore contact pin is frame shape.The area of described opening is roughly identical with the upper cross cross section of the exhaust port 11 matching according to size and shape, and described frame firmly and closely lies on cover plate 2c around described exhaust port in the time that vibrating valve 12 is closed.Described opening seals by faint ventilative film 14, and film is for example closely fixed on described frame by laser welded seam.
The sheet ring 13 with contact pin is made up as spring steel of the elastic material that being applicable to; Film is porous, and air can be flow through by the utmost point lentamente, and dirt is barred.Film is for example by expanded PTFE (ePTFE, for example conduct
known) make.
Baffler 9 this tank shape seal pump chamber 2, this baffler is surrounded for the effective volume of noise reduction.Baffler 9 is for example closely fixed on mounting plate 6 by threaded piece.Baffler is for example made up of plastics or light metal alloy.
Baffler 15 before being integrated with in baffler 9.This front baffler 15 be pipeline section shape and there is circular cross section.The internal diameter of front baffler 15 is identical with the internal diameter of sheet ring 13, and the external diameter of front baffler 15 is less than the external diameter of sheet ring 13.Front baffler 15 is clamped between baffler 9 and cover plate 2c in the situation that of predetermined pretension, and this pretension same purpose is on the sheet ring 13 being arranged between front baffler 15 and cover plate 2c.In this way sheet ring 13 is clamped and remained on cover plate 2c; This sheet ring is additionally located by threaded piece, and by described threaded piece, pump chamber 2 is fixed on mounting plate.Front baffler 15 is made up as rubber of elastic material.
Example 2
The second embodiment shown in Fig. 4 and the first embodiment's difference is, for each exhaust port 11 is provided with the vibrating valve 12 of independent structure.One of them vibrating valve 12 (replacing two) is only shown.
Vibrating valve 12 is shaped in plan view ligule, and film 14 is fixed in an end regions of vibrating valve 12.For constrained vibration valve 12 is away from the amplitude of cover plate 2c, stop tab 16 microscler, corresponding (being step-like) bending is set above vibrating valve 12 in longitudinal section.
Vibrating valve 12 its dorsad in the end regions of film 14 and stop tab 16 be jointly fixed on cover plate 2c by for example threaded piece or solder joint.
In the time that vacuum pump 1 moves, motor 5 is powered and drives rotor 3.Thus by air inlet tube 9 air amounts, produce negative pressure required on customer at this.The air sucking is compressed and pass through discharge portion in pump chamber 2--by the exhaust port 11 in cover plate 2c, by front baffler 15, then by exhaust passage, baffler 9 and vent connection 10 and the second flexible pipe--is directed in environment.
Based on the overvoltage producing in pump chamber 2, overcome its elastic force at this vibrating valve 12 and correspondingly lift (in Fig. 3, illustrating) by bending from cover plate 2c, air can slightly be leaked by consequent gap from exhaust port 11.
Once vacuum pump 1 is out of service, in pump chamber 2, no longer there is overvoltage.Therefore vibrating valve 12 is closed exhaust port 11 based on its elastic force, sets up thus negative pressure in pump chamber 2 according to the situation of suction side.Pressure compensation between the discharge portion of pump chamber 2 and vacuum pump 1 carries out lentamente, because air can only little by little be back in pump chamber 2 by film 14.Stop and may be present in airborne dirt particle by film 14 equally at this.Pressure compensation has gradually alleviated the load of vacuum pump 1 member and has realized corresponding additional cooling by air stream.
Reference numerals list
1 vacuum pump
2 pump chambers
2a base plate
2b pump ring
2c cover plate
3 rotors
4 slide plates
5 motors
6 mounting plates
7 conjunction cables
8 air inlet tubes
9 bafflers
10 vent connections
11 through holes
12 vibrating valves
13 sheet rings
14 films
15 front bafflers
16 stop tab
Claims (5)
1. vacuum pump, comprising: pump chamber (2), and rotatably mounted in this pump chamber have rotor (3) and this pump chamber to seal by cover plate (2c); Be used for driving the electric motor (5) of rotor (3); Discharge portion, this discharge portion disposes at least one vibrating valve (12); And air inlet tube (9), this air inlet tube is connected with gas-entered passageway effect, it is characterized in that, described vibrating valve (12) has breach in exhaust port to be sealed (11) region, and this breach is by film (14) sealing of porous.
2. according to the vacuum pump of claim 1, it is characterized in that, that described vibrating valve (12) is configured to ligule and be fixed on cover plate (2c).
3. according to the vacuum pump of claim 1, it is characterized in that, it is upper that described vibrating valve (12) is configured in sheet ring (13), and this sheet ring clamps and remains between cover plate (2c) and front baffler (15).
4. according to the vacuum pump of one of claims 1 to 3, it is characterized in that, the elastic part of vibrating valve (12) is made up of spring steel.
5. according to the vacuum pump of one of claim 1 to 4, it is characterized in that, described film (14) is made up of expanded PTFE.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013104375.5 | 2013-04-30 | ||
| DE102013104375.5A DE102013104375A1 (en) | 2013-04-30 | 2013-04-30 | vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104131979A true CN104131979A (en) | 2014-11-05 |
Family
ID=51684894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410166531.8A Pending CN104131979A (en) | 2013-04-30 | 2014-04-24 | Vacuum pump |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104131979A (en) |
| DE (1) | DE102013104375A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015118111A1 (en) | 2015-10-23 | 2017-04-27 | Hella Kgaa Hueck & Co. | Electric vacuum pump, in particular for mounting in a vehicle |
| DE102015120304A1 (en) | 2015-11-24 | 2017-05-24 | Hella Kgaa Hueck & Co. | Vacuum pump with sound damping and non-return valve |
| US11261869B2 (en) * | 2016-06-22 | 2022-03-01 | Pierburg Pump Technology Gmbh | Motor vehicle vacuum pump arrangement |
| IT201900009222A1 (en) * | 2019-06-17 | 2020-12-17 | Vhit Spa | PUMP WITH DIRECTION CHANGES AT THE DELIVERY |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2380523A (en) * | 2001-06-27 | 2003-04-09 | Luk Automobiltech Gmbh & Co Kg | Vacuum generator |
| DE10253295A1 (en) * | 2001-11-23 | 2003-06-05 | Luk Automobiltech Gmbh & Co Kg | Vacuum pump for brake force amplifier produces vacuum in closed chamber by driving working fluid in chamber from inlet opening to outlet opening which discharges into soundproofing chamber connected to environment |
| WO2007003215A1 (en) * | 2005-07-05 | 2007-01-11 | Vhit S.P.A. | Vacuum vane pump with discharge valve |
| CN201292943Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Vacuum pump |
| CN102410223A (en) * | 2010-09-09 | 2012-04-11 | 斯瓦本冶炼厂汽车股份有限公司 | Vacuum pump with ventilating means |
| JP2013502537A (en) * | 2009-08-24 | 2013-01-24 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Vacuum pump with pressure compensation device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4239575C2 (en) | 1992-11-25 | 1995-11-23 | Hella Kg Hueck & Co | Silencers for pneumatic pumps, in particular vane pumps in motor vehicles |
| US6139291A (en) * | 1999-03-23 | 2000-10-31 | Copeland Corporation | Scroll machine with discharge valve |
| DE10114327C2 (en) * | 2001-03-23 | 2003-07-03 | Danfoss Compressors Gmbh | suction silencer |
| DE102007010729B3 (en) * | 2007-01-04 | 2008-04-24 | Joma-Polytec Kunststofftechnik Gmbh | Vacuum pump for use in engine of motor vehicle, has sealing body flexibly designed and fixed at air discharge opening at front and rear ends of opening in rotation direction of rotor, where body lies permanently at opening |
| DE102007018247A1 (en) * | 2007-04-12 | 2008-10-16 | Joma-Hydromechanic Gmbh | vacuum pump |
-
2013
- 2013-04-30 DE DE102013104375.5A patent/DE102013104375A1/en not_active Withdrawn
-
2014
- 2014-04-24 CN CN201410166531.8A patent/CN104131979A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2380523A (en) * | 2001-06-27 | 2003-04-09 | Luk Automobiltech Gmbh & Co Kg | Vacuum generator |
| DE10253295A1 (en) * | 2001-11-23 | 2003-06-05 | Luk Automobiltech Gmbh & Co Kg | Vacuum pump for brake force amplifier produces vacuum in closed chamber by driving working fluid in chamber from inlet opening to outlet opening which discharges into soundproofing chamber connected to environment |
| WO2007003215A1 (en) * | 2005-07-05 | 2007-01-11 | Vhit S.P.A. | Vacuum vane pump with discharge valve |
| CN201292943Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Vacuum pump |
| JP2013502537A (en) * | 2009-08-24 | 2013-01-24 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Vacuum pump with pressure compensation device |
| CN102410223A (en) * | 2010-09-09 | 2012-04-11 | 斯瓦本冶炼厂汽车股份有限公司 | Vacuum pump with ventilating means |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102013104375A1 (en) | 2014-10-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141105 |
|
| WD01 | Invention patent application deemed withdrawn after publication |