EP1334278A1 - Ein- oder mehrstufiger kolbenverdichter und verfahren zur kühlung eines elektrischen motors für einen ein- oder mehrstufigen kolbenverdichter - Google Patents
Ein- oder mehrstufiger kolbenverdichter und verfahren zur kühlung eines elektrischen motors für einen ein- oder mehrstufigen kolbenverdichterInfo
- Publication number
- EP1334278A1 EP1334278A1 EP01996687A EP01996687A EP1334278A1 EP 1334278 A1 EP1334278 A1 EP 1334278A1 EP 01996687 A EP01996687 A EP 01996687A EP 01996687 A EP01996687 A EP 01996687A EP 1334278 A1 EP1334278 A1 EP 1334278A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston compressor
- electric motor
- piston
- pressure
- low
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000002826 coolant Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 230000009347 mechanical transmission Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/066—Cooling by ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B25/00—Multi-stage pumps
- F04B25/02—Multi-stage pumps of stepped piston type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
Definitions
- the invention relates to a single or multi-stage piston compressor according to the preamble of claim 1 and to a method for cooling an electric motor for a single or multi-stage piston compressor according to the preamble of claim 5.
- Such piston compressors are used in particular in the automotive industry.
- This two-stage piston compressor consists of a compressor housing in which a cylindrical low-pressure chamber with a larger low-pressure piston and a cylindrical high-pressure chamber with a smaller high-pressure piston are formed.
- the low-pressure chamber and the high-pressure chamber are located on a common axis and the low-pressure piston and the high-pressure piston are formed in one piece and equipped with a common piston rod.
- the low pressure chamber has an inlet with an inlet check valve
- the high pressure chamber has an outlet with an outlet check valve and both pressure chambers are connected to an overflow check valve by an overflow channel.
- a crank pin of a crankshaft engages in the common piston rod of the low-pressure piston and the high-pressure piston in a right-angled orientation is driven by an electric motor and converts its rotating movement into a linear movement on the common piston rod.
- a free space is also formed in the compressor housing, which is located in the area between the low-pressure piston and the high-pressure piston and the size of which essentially results from the difference in diameter and the axial distance between the low-pressure piston and the high-pressure piston.
- This free space is connected to the environment via a compensation opening.
- Piston compressors of this type have the disadvantage that a substantial part of the drive energy is converted into heat and thus negatively affects the efficiency of the technical unit.
- the electric motor produces its own heat, which then has to be removed or recooled in a complex manner to protect the insulation. On the one hand, this limits the service life of the electric motors and requires additional and expensive cooling measures on the electric motor.
- heat is generated on the piston compressor primarily by the recurring compression of the air, especially in the high-pressure chamber, but also by an internal friction of the air in the free space between the two pressure chambers.
- the internal friction of this enclosed amount of air in the free space depends on the design of the piston compressor, but in any case represents a power loss for which additional drive power must be applied in an unacceptable manner.
- the resulting heating on the piston compressor is either compensated for by an appropriate choice of material or material dimensioning to an acceptable level or the heat energy released is again cooled in a complex manner. All this affects the efficiency of the technical unit and makes the technical unit complex and expensive because of the increased cooling measures.
- the invention is therefore based on the object of a generic piston compressor and a method for cooling an electric drive for such To develop piston compressors in which the generation of heat loss at the piston compressor is reduced and the cooling of the electric motor is simplified.
- the invention eliminates the disadvantages of the prior art mentioned. It is particularly advantageous that the necessary cooling measures for the heated piston compressor can be kept low, because the heating of the piston compressor can be kept within limits by the removal of the heated air in the free space of the piston compressor. This simplifies the construction of the piston compressor and saves manufacturing costs.
- the electric motor is only cooled with the air flow from the piston compressor to ensure its service life. This saves otherwise necessary complex cooling measures for the electric motor and in turn saves manufacturing costs.
- the piston compressors according to the invention can be used for all types of protection.
- FIG. 1 a schematic representation of an electrically driven two-stage piston compressor in a first embodiment
- Fig. 2 another embodiment of the two-stage piston compressor.
- the two-stage piston compressor in the first embodiment consists according to the Fig.
- I mainly consist of the actual piston compressor 1 and an electric motor 2, both of which are connected via a mechanical gear 3 for converting the rotating input movement of the electric motor 2 into an oscillating and linear output movement of the piston compressor 1.
- the piston-type compressor 1 includes a compressor housing 4 with a cylindrical interior 5 which is stepped in diameter and which is closed on the one hand by a low-pressure cover 6 and on the other hand by a high-pressure cover 7.
- the gradation in the diameter of the interior 5 results on the one hand in a low-pressure chamber 8 with a larger diameter, in which a low-pressure piston 9 is guided with play, and on the other hand, a high-pressure chamber 10 with a smaller diameter, in which a high-pressure piston 11 is fitted with play.
- the low-pressure chamber 8 and the high-pressure chamber 10 lie on a common axis.
- the low-pressure piston 9 and the high-pressure piston 11 are made in one piece and accordingly have a common piston rod 12.
- the low-pressure chamber 8 and the high-pressure chamber 10 are connected to one another and to the outside in a special way.
- the low-pressure chamber 8 has at least one inlet 13, each with an inlet check valve 14 that opens in the direction of the low-pressure chamber 8
- the high-pressure chamber 10 has an outlet 15 with an outlet check valve 16, which closes in the direction of the high-pressure chamber 10.
- the common piston rod 12 and the low pressure piston 9 and the high pressure piston is the common piston rod 12 and the low pressure piston 9 and the high pressure piston
- I I equipped with an inner overflow channel 17, which has an overflow check valve 18 opening in the direction of the high pressure chamber 10.
- the common piston rod 12 is equipped with means for power transmission.
- this free space 19 is connected to the interior of the mechanical transmission 3 via at least one first housing opening 20 and further to the interior of the electric motor 2 via at least one second housing opening 21.
- One or more third housing openings 22 connect the interior of the electric motor 2 to the atmospheric environment. These third housing openings 22 are located as far as possible from the second housing openings 21 in order to obtain the largest possible flow area within the engine 2. In order to ensure a high degree of protection for the electric motor 2, the third housing openings 22 are placed outside the dirt and water hazard area via suitable means.
- the second embodiment of the two-stage piston compressor according to FIG. 2 basically has the same structure as the first embodiment.
- the second embodiment is equipped with an additional suction chamber 23, which is arranged in the flow direction before the inlet 13 to the low-pressure chamber 8 and which on the one hand has a connection to the atmosphere via an inlet opening 24 and on the other hand has a connection channel 25 to the interior of the mechanical transmission 3 is connected.
- the suction chamber 23 is thus also connected to the free space 19 in the compressor housing 4 and to the interior of the electric motor 2 via the first housing opening 20 and the second housing opening 21.
- the interior of the electric motor 2 is hermetically separated from the outside world.
- the suction chamber 23 can of course also be designed as an open suction area. In order to ensure the required high degree of protection for the electric motor 2, the inlet opening 24 for the suction chamber 23 is again placed outside the dirt and water hazard area by suitable means.
- an expedient embodiment consists in connecting the free space 19 to the atmosphere via one or more suction bores 26 with a suitable inlet check valve 27 opening in the direction of the free space 19.
- the rotating movement of the drive shaft of the electric motor 2 is converted into an oscillating linear movement by means of the mechanical transmission 3 and transmitted to the common piston rod 12.
- the low-pressure piston 9 and the high-pressure piston 11 thus move equally between two opposite reversal points and thus form two pressure chambers which alternate in volume.
- This sequence of movements and the functions of the inlet check valve 14, the overflow pressure relief valve 18 and the outlet check valve 16 ensure that air is drawn in and out of the atmosphere into the low-pressure chamber 8, conveyed via the overflow channel 17 into the high-pressure chamber 10 and compressed and expelled there becomes.
- the sequence of movements of the two low-pressure and high-pressure pistons 9, 11 likewise means that the free space 19 of the compressor housing 4 alternately increases and decreases, so that the air located there alternately via the first housing bore 20 into the interior of the mechanical transmission 3 and via the second housing bore 21 into the interior of the electric motor 2 and from there is expelled into the open via third housing bore 22 and is then sucked in again in return. This keeps the air moving in this area and practically pushes it back and forth.
- air is sucked in from the outside via this inlet check valve 27 and discharged into the open via the third housing opening 22 which is removed.
- the air that is moved either way serves as a coolant for the electric motor.
- the required air is drawn in with an increasing free space 19 in the compressor housing 4 via the inlet opening 24, the suction chamber 23 and the connecting channel 25, and in the case of using the inlet check valve 27 also via this inlet check valve 27, and thus the Space 19 filled.
- a shrinking free space 19 as the arrows in FIG. 2 show, the air located in the free space 19 is expelled and is first conveyed into the suction chamber 23 via the connecting channel 25. Since the low-pressure chamber 8 enlarges and air is sucked in at the same time, the air made available from the free space 19 immediately returns to the low-pressure space 8.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10057383A DE10057383B4 (de) | 2000-11-18 | 2000-11-18 | Mehrstufiger Kolbenverdichter und Verfahren zur Kühlung eines elektrischen Motors für einen mehrstufigen Kolbenverdichter |
| DE10057383 | 2000-11-18 | ||
| PCT/DE2001/004280 WO2002040867A1 (de) | 2000-11-18 | 2001-11-15 | Ein- oder mehrstufiger kolbenverdichter und verfahren zur kühlung eines elektrischen motors für einen ein- oder mehrstufigen kolbenverdichter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1334278A1 true EP1334278A1 (de) | 2003-08-13 |
| EP1334278B1 EP1334278B1 (de) | 2006-07-19 |
Family
ID=7663881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP01996687A Expired - Lifetime EP1334278B1 (de) | 2000-11-18 | 2001-11-15 | Ein- oder mehrstufiger kolbenverdichter und verfahren zur kühlung eines elektrischen motors für einen ein- oder mehrstufigen kolbenverdichter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20040052651A1 (de) |
| EP (1) | EP1334278B1 (de) |
| JP (1) | JP2004514089A (de) |
| AT (1) | ATE333589T1 (de) |
| DE (2) | DE10057383B4 (de) |
| WO (1) | WO2002040867A1 (de) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10321771C5 (de) * | 2003-05-15 | 2017-01-19 | Continental Teves Ag & Co. Ohg | Verfahren zur Leistungsbegrenzung eines mehrstufigen Kompressor und Kompressor zur Durchführung des Verfahrens |
| US8430807B2 (en) | 2007-12-28 | 2013-04-30 | Boston Scientific Scimed, Inc. | Devices and methods for treating pelvic floor dysfunctions |
| US9125716B2 (en) | 2009-04-17 | 2015-09-08 | Boston Scientific Scimed, Inc. | Delivery sleeve for pelvic floor implants |
| WO2012009858A1 (zh) * | 2010-07-22 | 2012-01-26 | 温州市荣德气阀有限公司 | 能改善进气状态的天然气压缩机 |
| US8550794B2 (en) * | 2010-08-09 | 2013-10-08 | Foothill Land, Llc | Double acting fluid pump |
| DE102011008086A1 (de) * | 2011-01-07 | 2012-07-12 | Inficon Gmbh | Doppeltwirkender Kältemittelkompressor |
| DE102011121056A1 (de) | 2011-12-14 | 2013-06-20 | Wabco Gmbh | Verdichter zum Einsatz in einem Luftfedersystem sowie ein Verfahren zum Betrieb eines solchen Luftfedersystems |
| DE102011121055A1 (de) | 2011-12-14 | 2013-06-20 | Wabco Gmbh | Mehrstufiger Verdichter sowie ein mit einem solchen Verdichter ausgestattetes Luftfedersystem |
| KR102333982B1 (ko) | 2015-07-01 | 2021-12-02 | 엘지전자 주식회사 | 리니어 압축기 |
| CN112930807B (zh) * | 2021-03-26 | 2023-04-28 | 深圳市农科蔬菜科技有限公司 | 一种用于蔬菜移栽机的空气减振设备 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE514266C (de) * | 1930-12-10 | Max Bernhardt | Vorrichtung zum Kuehlen von Verdichtern | |
| US2042510A (en) * | 1933-12-01 | 1936-06-02 | Richard T Cornelius | Motor pump unit |
| US2403814A (en) * | 1942-02-17 | 1946-07-09 | Maniscalco Pictro | Compressor |
| FR1257735A (fr) * | 1960-02-23 | 1961-04-07 | Perfectionnements apportés aux dispositifs de refroidissement des compresseurs d'air | |
| JPS59183089A (ja) * | 1983-03-31 | 1984-10-18 | Jidosha Kiki Co Ltd | コンプレツサ |
| US4743176A (en) * | 1986-06-18 | 1988-05-10 | Tecumseh Products Company | Gas flow system for a compressor |
| FR2637653B1 (fr) * | 1988-10-11 | 1994-04-08 | Barlier Claude | Ensemble de compression dite inverse |
| DE4429098A1 (de) * | 1994-08-17 | 1996-02-22 | Thurner Bayer Druckguss | Kolbenverdichter für gasförmige Medien |
| DE19715291C2 (de) * | 1997-04-11 | 2002-05-16 | Pnp Luftfedersysteme Gmbh | Zweistufiger Kompressor |
| DE19726943C2 (de) * | 1997-06-25 | 2000-03-23 | Bitzer Kuehlmaschinenbau Gmbh | Kältemittelkompressor |
-
2000
- 2000-11-18 DE DE10057383A patent/DE10057383B4/de not_active Expired - Fee Related
-
2001
- 2001-11-15 WO PCT/DE2001/004280 patent/WO2002040867A1/de not_active Ceased
- 2001-11-15 AT AT01996687T patent/ATE333589T1/de not_active IP Right Cessation
- 2001-11-15 DE DE50110509T patent/DE50110509D1/de not_active Expired - Lifetime
- 2001-11-15 EP EP01996687A patent/EP1334278B1/de not_active Expired - Lifetime
- 2001-11-15 JP JP2002543158A patent/JP2004514089A/ja active Pending
-
2003
- 2003-05-19 US US10/440,672 patent/US20040052651A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0240867A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10057383A1 (de) | 2002-05-29 |
| DE50110509D1 (de) | 2006-08-31 |
| US20040052651A1 (en) | 2004-03-18 |
| WO2002040867A1 (de) | 2002-05-23 |
| JP2004514089A (ja) | 2004-05-13 |
| ATE333589T1 (de) | 2006-08-15 |
| EP1334278B1 (de) | 2006-07-19 |
| DE10057383B4 (de) | 2005-10-06 |
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