CN102865229A - Electric vacuum pump for motor vehicle - Google Patents
Electric vacuum pump for motor vehicle Download PDFInfo
- Publication number
- CN102865229A CN102865229A CN2012102343416A CN201210234341A CN102865229A CN 102865229 A CN102865229 A CN 102865229A CN 2012102343416 A CN2012102343416 A CN 2012102343416A CN 201210234341 A CN201210234341 A CN 201210234341A CN 102865229 A CN102865229 A CN 102865229A
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- Prior art keywords
- vacuum pump
- hole
- fusibility
- aforementioned
- unit
- 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.)
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Classifications
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- 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
- F04C29/04—Heating; Cooling; Heat insulation
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- 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
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- 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
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- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The present invention relates to a vacuum pump (1), wherein the inlet connection member (2) of the vacuum pump is connected with a unit generating a negative pressure through a connection pipe line, between the vacuum pump (1) and the unit there is provided a non-return valve, and the vacuum pump (1) is provided with a monitoring unit. In order to prevent the vacuum pump from being overheated with no need for continuous operation, the lower portion of the non-return valve is provided with a hole (5), and the hole (5) is enclosed when used for meltable materials (6, 8) fused at a pre-defined melt temperature and for sublimable materials (6, 8) sublimated at a pre-defined sublimating temperature. The originally-enclosed hole (5) is opened through the melted or sublimated meltable or sublimable materials, thereby being convenient for the vacuum pump (1) to inhale fresh air for cooling.
Description
Technical field
The present invention relates to a kind of vacuum pump, be particularly related to a kind of sliding vane vacuum pump (vane cell vacuum pump), its inlet connecting is connected with the unit by connecting line, will produce negative pressure in the unit, be provided with safety check between vacuum pump and the unit, vacuum pump can be controlled by monitoring unit.
Background technique
DE 10 2,004 012 736 A1 and DE 2 356 398 these two pieces of patent documentations disclose the fusibility safety installations, and they are all irrelevant with the classification of this patent.
In automotive engineering, vacuum pump, particularly sliding vane vacuum pump are known, and it can produce negative pressure in brake servo (unit).Therefore, the basic structure of sliding vane vacuum pump will do not discussed in detail.
These vacuum pumps can be known with electric drive, and their operation is controlled by monitoring unit.Thereby, the unblanking that can produce according to monitoring unit and close vacuum pump.For example, when motor or internal combustion engine operation or motor vehicle were advanced, monitoring unit produced the signal of operated vacuum pumps, and when motor or internal-combustion engine cuts out or motor vehicle when static, monitoring unit produces the signal that stops vacuum pump.
If monitoring unit goes wrong, such situation can occur: even close or motor vehicle when static at internal-combustion engine, vacuum pump is constantly running still.Yet during the static or tail-off of motor vehicle, the vacuum pump that is turning round is not cooled or cools off insufficiently, so that it is overheated, and this can cause whole vacuum pump malfunctioning.This malfunctioning can only the rectification by the professional workforce, generally speaking, this fault can only be corrected by new vacuum pump.This not only produces the very long cycle in the workshop, but also produces sizable cost, not only comprises high labor cost, especially, also comprises sizable cost of material of whole vacuum pump.
Summary of the invention
Target of the present invention provides a kind of improved vacuum pump, particularly a kind of sliding vane vacuum pump, and this vacuum pump is not because the former thereby damage of heat, therefore, no matter tail-off or motor vehicle are static is even when the vacuum pump continuous running, can cool off fully.
Target of the present invention realizes by the vacuum pump with the described feature of claim 1, wherein, is provided with the hole in check valve downstream, this hole be used in can predefined fusing or sublimation temperature under the material sealing of fusing or distillation.Particularly, vacuum pump is embodied as sliding vane vacuum pump, and preferably, the unit is embodied as the brake servo uni of motor vehicle.
The present invention is based on the understanding to such fact: in the process of operated vacuum pumps or sliding vane vacuum pump, in unit or brake servo uni, produce negative pressure, thereby from brake servo uni suction medium.Therefore, the medium that aspirates flows from brake servo uni along connecting line at main flow direction, by safety check and inlet connecting, enters the suction chamber of vacuum pump.Therefore, from main flow direction, vacuum pump is arranged on the downstream of brake servo uni, and safety check be arranged on brake servo uni the downstream but in the upstream of vacuum pump.So from main flow direction, the material blind bore that is used under the specified temp fusing or distillation is arranged in the downstream of safety check but in the upstream of suction chamber.
At first, but with fusibility or sublimating material blind hole.And as long as near predetermined fusing or the sublimation temperature of not reaching in hole, this state can not change.But, in case reach predetermined fusing or sublimation temperature, but just fusing or the distillation of fusibility or sublimating material, just open in the hole like this.
Therefore, but as long as no the fusing that reaches fusibility or sublimating material or sublimation temperature, the hole is sealed all the time.
If because the vacuum pump continuous running and cool off insufficient or not cooling and make the vacuum pump might be overheated when static of tail-off and/or motor vehicle, then the present invention comes into effect.In this case, but advantageously will be arranged on the inlet connecting that is arranged in check valve downstream and vacuum pump suction chamber upstream with fusibility or sublimating material blind bore.Only open because of near the high temperature the hole thereby advantageously guarantee the hole, and do not rely on other influence factor.
In case the hole is opened, but because fusing or the distillation of fusibility or sublimating material, fresh air around vacuum pump can aspirate, these fresh airs are comparatively cold with respect to the internal system temperature, therefore be effective " secondary " air-flow, thus, although vacuum pump continuous running when tail-off and/or motor vehicle are static, it also can be cooled.
The present invention be it is also important that to motor vehicle, particularly to the requirement of the operating security of brake servo uni with the braking system that is associated, although in the system of normal sealing, opening is arranged, must its operating security of maintenance.Vacuum pump has predetermined power curve, and the clean cross section of inlet connecting and connecting line and internal diameter are fit to respectively this power curve, will not further specify here.Yet advantageously, hole shape becomes in wall, preferably in the wall of inlet connecting or connecting line, has an opening size, and this opening size is more much smaller than described internal diameter.For example, only as an example, the hole can have the opening size less six times than the internal diameter of inlet connecting.Only as an example, internal diameter can be 9mm, so Kongzui can have greatly the opening size of 1.5mm.Under such size, guaranteed the safety operation of motor vehicle, suction is enough in the required negative pressure of generation in the unit fresh air or secondary air are used for cooling.In addition, by the effect of safety check, negative pressure is maintained in the unit to a great extent.Above-mentioned exemplary dimensions should not be restricted.Certainly, other diameter is than also being fine.
Yet, as long as vacuum pump might be overheated, but just by melting away fusibility or sublimating material is opened the hole, this situation may be that the defective monitoring unit of tool is arranged, although tail-off and/or motor vehicle are static, the defective monitoring unit of tool causes that vacuum pump turns round constantly.Certainly, other defective also can cause continuous running.Self-evident, but after fusibility or sublimating material had melted or distil, motor vehicle should for good and all operation because of the opening in the system.Or rather, practicable is to go to the maintenance shop at once, but corrects there the defective cause fusibility or sublimating material fusing or distillation, but and immediately with fusibility or sublimating material again blind hole.For example, can inform that motor vehicle operator need to go to the workshop immediately by the alert message of the suitable sense of hearing, vision and/or sense of touch, reception and the transmission that can guarantee signal by monitoring cell and/or suitable sensor and message elements.
Yet, be apparent that, but by fusing or distillation fusibility or sublimating material, open provisionally in the hole, so that by aspirate fresh air cooling vacuum pump or sliding vane vacuum pump from the external world.Therefore, although when tail-off and/or motor vehicle are static, the vacuum pump continuous running has advantageously avoided vacuum pump overheated, so also avoided whole breaking-ups of vacuum pump or sliding vane vacuum pump.Therefore, this compares with whole replacing vacuum pump, has not only shortened the time that must go to the workshop, and has reduced the use of material.This has also saved global material resources, because utilize the present invention, owing to heat causes that the malfunctioning vacuum pump that needs to change will be still less.
In situation of the present invention, if but fusibility or sublimating material have fusing or the sublimation temperature of the critical temperature that is lower than the damage that heat that vacuum pump can bear causes, and this is favourable.But because fusibility or sublimating material be arranged on the hole near, preferably, be arranged in the inlet connecting of heat conduction, so favourable setting is, but being suitable for the inlet connecting of heat conduction, the fusing of fusibility or sublimating material or sublimation temperature estimate the vacuum pump that caused by heat or the temperature of sliding vane vacuum pump fault.This is based on the understanding to such fact: the inlet connecting true temperature may be lower than estimates that the critical temperature of heat damage appears in vacuum pump.For example, the critical temperature of vacuum pump can be 200 ° of C, so but the fusing of fusibility or sublimating material or sublimation temperature preferably can be 160 ° of C.
Certainly, different vacuum pumps can have different critical temperatures.Therefore, advantageously, but fusibility or sublimating material are plastic materials or synthetic resin, and these materials can be to make with the concrete matched mode of hot situation of vehicular manufacturer's explanation.This also is very much useful, because by this way, but not only the vehicular manufacturer can easily obtain required concrete fusibility or sublimating material, and its maintenance center (workshop) also can easily obtain.
The fusibility material may be embodied as fusible plug, and during blind hole, fusible plug covers the outer wall of inlet connecting, but in order not hinder flowing in the inlet connecting in course of normal operation, fusible plug does not preferably extend through its inwall.
Description of drawings
Referring to the further favorable structure of description of drawings the present invention, wherein:
Fig. 1 is the fragmentary, perspective view of vacuum pump;
Fig. 2 represents the enlarged view of inlet connecting; And
Fig. 3 represents to pass the viewgraph of cross-section of the inlet connecting of the hatching A-A among Fig. 2.
Should be pointed out that in the claim feature that describes in detail separately can with any needs, favourable technically mode is bonded to each other, and further specifies structure of the present invention.Specification, particularly by reference to the accompanying drawings additional description feature of the present invention and describe the present invention in detail.In different accompanying drawings, identical reference character represents identical part, so, usually only they are done disposable explanation.
Embodiment
Fig. 1 represents a kind of vacuum pump 1, particularly, represent a kind of sliding vane vacuum pump 1, its inlet connecting 2 is connected with the unit (not shown) that will produce negative pressure by the connecting line (not shown), be provided with the safety check (not shown) between vacuum pump 1 and the unit, vacuum pump 1 is controlled by the monitoring unit (not shown).
In this example, vacuum pump 1 for this reason, provides corresponding electric coupler 3 with electric drive.Monitoring unit can be connected with electric coupler.Monitoring unit causes vacuum pump 1 opening and closing and therefore enters serviceability.
For example, when vacuum pump 1 during at serviceability, the unit that will produce negative pressure is brake servo uni.
After vacuum pump 1 had turned round, it sucked medium the suction chamber of vacuum pump 1 from the unit by inlet connecting 2 along connecting line.By this way, in the unit, produce in a known way negative pressure.Main flow direction is with arrow 4 expressions.Therefore, from flow direction 4, advantageously, safety check is arranged on the downstream of unit and the upstream of vacuum pump 1, preferably, in connecting line or on the connecting line.Connecting line can be the form of flexible pipe, and is connected with the unit with inlet connecting 2 and is connected.
Therefore, in this example, make vacuum pump 1 turn round or not turn round by monitoring unit.Usually, when tail-off or motor vehicle were static, vacuum pump 1 did not turn round.
Yet, possiblely be, for example, there is defective in monitoring unit, although so that do not need to produce negative pressure, vacuum pump 1 remains in operation.In this case, for example, if tail-off and/or motor vehicle are static, because cooling fan is static, vacuum pump 1 lacks to move the wind that produces and/or cool stream and no longer is cooled.Because the interior friction of vacuum pump 1 and/or the electric current that provides to vacuum pump 1, thereby it continues to produce heat, might be overheated, so that it may be subject to the damage that caused by heat even thoroughly malfunctioning.This just has to change vacuum pump 1 with relatively high time and materials cost.
The present invention here begins to work, because hole 5 is advantageously provided as being sealed by thermal response material 6, preferably, hole 5 is in inlet connecting 2.Therefore, according to the downstream that is arranged on safety check by fusibility material 6 blind bores 5 provided by the present invention, this fusibility material 6 can melt under the predefined melting point.
And if possible overheated, then thermal response material 6 will or melt away by fusing and open hole 5 vacuum pump 1 owing to above-mentioned situation, thereby so that vacuum pump 1 can cool off from external world's suction fresh air.Certainly, hole 5 is formed in the inlet connecting 2, and by this way, during connection, it is not connected pipeline and covers.
Therefore, what can guarantee is, vacuum pump 1 can be not overheated, and can not be subject to the damage that caused by heat, like this, the result who goes to the workshop subsequently corrects the defective that causes fault, with suitable fusibility material 6 again blind hole 5, do not need to change vacuum pump 1, thereby do not need to disconnect all links and fastening point.
Be preferably formed as in the wall 7 of link 2 with fusibility material 6 blind bores 5, but this not necessarily.
Can find out significantly from Fig. 3, in the drawing plane, hole 5 is formed at the upper apex region of wall 7 with the form of the boring of cylindrical cross section.This is suitable, because when 6 fusing of fusibility material, it can only flow away by gravity or drip.Certainly, a small amount of fusibility material 6 also flows to the inside of inlet connecting 2, yet this further operation to vacuum pump 1 does not have harm.
Fusibility material 6 is embodied as fusible plug 8(Fig. 3 effectively), fusible plug 8 blind holes 5, fusibility material 6 applies in such a way: it does not extend through the inwall 9 of inlet connecting 2, but covers outer wall 10, plugging hole 5.As shown in Figure 3, the geometrical construction of fusible plug 8 is similar to rhombogen, and certainly, the geometrical construction of fusible plug 8 should not be restricted.
Fusibility material 6 has the melting point of the critical temperature that is lower than vacuum pump 1.Because the hole 5 in the fusible plug 8 sealing inlet connectings 2, predetermined melting point should be suitable for the hot situation of inlet connecting 2 certainly, because only have the temperature levels of this inlet connecting 2 just can cause the fusible plug fusing.Can easily obtain nature is that the inlet connecting 2 of heat conduction is with respect to the temperature gradient of critical temperature, owing to these computational methods are determined by simple physics law, so will not discuss further.
Yet advantageously, fusible plug 8 melts away in a certain temperature, like this by opening hole 5, suck ozone and realizing that the cooling of vacuum pump 1 avoids vacuum pump 1 overheated.
Certainly, can make fusibility material 6 with each correlated performance parameter (for example fusing point or melting range) that is suitable for concrete vacuum pump 1 of fusibility material 6.Fusibility material 6 is fit to be made by the easy-to-handle material that can suitably adjust.For this reason, plastic materials is favourable.
For example, vacuum pump 1 can have the critical temperature of 200 ° of C, and fusibility material 6 can have the melting point of 160 ° of C like this.Other vacuum pump can have different critical temperature values, and fusibility material 6 should correspondingly adapt to like this.
In case opened hole 5, fusible plug 8 has melted away, and when passing on to the driver by suitable warning device or vision, the sense of hearing and/or sense of touch class signal, nature should go to the maintenance shop at once.
Fusible plug 8 can also be sublimable stopper, and the function of stopper is identical like this, but does not have solid or liquid molten material to enter precombustion chamber or the pump chamber (not shown) of inlet connecting 2, inside.
Claims (11)
1. vacuum pump, it is characterized in that, its inlet connecting (2) is connected with the unit that wherein will produce negative pressure by connecting line, be provided with safety check between vacuum pump (1) and this unit, vacuum pump (1) has monitoring unit, wherein, is provided with hole (5) in check valve downstream, hole (5) is used in fusibility material (6, the 8) sealing of melting under can predefined melting point.
2. vacuum pump, it is characterized in that, its inlet connecting (2) is connected with the unit that wherein will produce negative pressure by connecting line, be provided with safety check between vacuum pump (1) and this unit, vacuum pump (1) has monitoring unit, wherein, is provided with hole (5) in check valve downstream, hole (5) but be used in sublimating material (6, the 8) sealing that distils under can predefined sublimation temperature.
3. vacuum pump according to claim 1 and 2 is characterized in that, described vacuum pump is sliding vane vacuum pump (1), and described unit is the brake servo uni of motor vehicle.
4. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described hole (5) are formed in the inlet connecting (2).
5. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described hole (5) but open based on the fusing of fusibility or sublimating material (6) or distillation so that vacuum pump (1) is by hole (5) suction fresh air.
6. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described hole (5) have opening size in open mode, and described opening size is less than the internal diameter of inlet connecting (2), preferably, less than the sixth of inlet connecting (2) internal diameter.
7. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described fusibility material (6) is fusible plug (8), but described sublimating material (6) is sublimable stopper (8).
8. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described fusibility material (6,8) is made by the material with adjustable fusing point, preferably, is made by plastic materials, further preferably, is made by synthetic resin.
9. according to the described vacuum pump of aforementioned each claim, it is characterized in that, but described sublimating material (6,8) made by the material with adjustable sublimation point, preferably, made by plastic materials, further preferably, made by synthetic resin.
10. according to the described vacuum pump of aforementioned each claim, it is characterized in that, described fusibility material (6,8) has the fusing point of the critical temperature that is lower than vacuum pump (1).
11. according to the described vacuum pump of aforementioned each claim, it is characterized in that, but described sublimating material (6,8) has the sublimation point of the critical temperature that is lower than vacuum pump (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011078816.6 | 2011-07-07 | ||
| DE201110078816 DE102011078816B3 (en) | 2011-07-07 | 2011-07-07 | Electrically driven vacuum pump, particularly vane cell vacuum pump for motor vehicle, has control and monitoring unit, where opening is formed downstream of check valve, and opening is enclosed by refractory material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102865229A true CN102865229A (en) | 2013-01-09 |
| CN102865229B CN102865229B (en) | 2016-01-20 |
Family
ID=47228679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210234341.6A Active CN102865229B (en) | 2011-07-07 | 2012-07-06 | The electric vacuum pump of motor vehicle |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN102865229B (en) |
| BR (1) | BR102012016523A2 (en) |
| DE (1) | DE102011078816B3 (en) |
| RU (1) | RU2589560C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314822A (en) * | 2014-10-24 | 2015-01-28 | 山东省章丘鼓风机股份有限公司 | Roots blower with fusible plug |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016212104B4 (en) * | 2016-07-04 | 2018-10-31 | Magna Powertrain Bad Homburg GmbH | Method for controlling a vacuum pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08109888A (en) * | 1994-10-13 | 1996-04-30 | Ishikawajima Shibaura Mach Co Ltd | Root type vacuum pump |
| CN201650733U (en) * | 2010-04-13 | 2010-11-24 | 好利旺机械(上海)有限公司 | Vacuum pump |
| CN101943164A (en) * | 2009-06-18 | 2011-01-12 | 坎特株式会社 | The vacuum pump that is used for vehicle |
| KR20110004217A (en) * | 2009-07-07 | 2011-01-13 | 영신정공 주식회사 | Electro vacuum pump |
| CN201763611U (en) * | 2010-08-26 | 2011-03-16 | 常州亿晶光电科技有限公司 | Water cooling device of flow-dividing type vacuum pump unit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3270675A (en) * | 1963-06-28 | 1966-09-06 | Williams & Hussey Machine Corp | Rotary sliding-vane pump |
| US3906976A (en) * | 1973-03-21 | 1975-09-23 | Sundstrand Corp | Thermally activated burst disc |
| JPS54159316U (en) * | 1978-04-28 | 1979-11-07 | ||
| GB2087484B (en) * | 1980-10-11 | 1984-05-16 | Drum Engineering The Co Ltd | Rotary vacuum-pumps |
| SU989144A1 (en) * | 1981-04-16 | 1983-01-15 | Предприятие П/Я А-1614 | Vacuum pump |
| US5634847A (en) * | 1996-03-05 | 1997-06-03 | Shea Technology | Fire Retardant reinforced plastic duct system |
| DE102004012736A1 (en) * | 2004-03-15 | 2005-10-06 | A. Friedr. Flender Ag | Fuse for a hydrodynamic coupling |
| DE102007043350B3 (en) * | 2007-09-12 | 2009-05-28 | Oerlikon Leybold Vacuum Gmbh | Vacuum pump and method for controlling a gas ballast supply to a vacuum pump |
-
2011
- 2011-07-07 DE DE201110078816 patent/DE102011078816B3/en not_active Expired - Fee Related
-
2012
- 2012-07-04 BR BR102012016523A patent/BR102012016523A2/en active Search and Examination
- 2012-07-06 RU RU2012128349/06A patent/RU2589560C2/en active
- 2012-07-06 CN CN201210234341.6A patent/CN102865229B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08109888A (en) * | 1994-10-13 | 1996-04-30 | Ishikawajima Shibaura Mach Co Ltd | Root type vacuum pump |
| CN101943164A (en) * | 2009-06-18 | 2011-01-12 | 坎特株式会社 | The vacuum pump that is used for vehicle |
| KR20110004217A (en) * | 2009-07-07 | 2011-01-13 | 영신정공 주식회사 | Electro vacuum pump |
| CN201650733U (en) * | 2010-04-13 | 2010-11-24 | 好利旺机械(上海)有限公司 | Vacuum pump |
| CN201763611U (en) * | 2010-08-26 | 2011-03-16 | 常州亿晶光电科技有限公司 | Water cooling device of flow-dividing type vacuum pump unit |
Non-Patent Citations (1)
| Title |
|---|
| 薛建全: "真空泵电机过热原因分析及处理", 《石油和化工设备》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314822A (en) * | 2014-10-24 | 2015-01-28 | 山东省章丘鼓风机股份有限公司 | Roots blower with fusible plug |
| CN105587666A (en) * | 2014-10-24 | 2016-05-18 | 山东省章丘鼓风机股份有限公司 | Roots blower |
| CN104314822B (en) * | 2014-10-24 | 2016-09-21 | 山东省章丘鼓风机股份有限公司 | A kind of roots blower of band fusible plug |
| CN105587666B (en) * | 2014-10-24 | 2018-11-30 | 山东省章丘鼓风机股份有限公司 | A kind of roots blower |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102011078816B3 (en) | 2012-12-20 |
| BR102012016523A2 (en) | 2014-01-21 |
| CN102865229B (en) | 2016-01-20 |
| RU2012128349A (en) | 2014-01-20 |
| RU2589560C2 (en) | 2016-07-10 |
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