US20120134851A1 - Compressor comprising a piston dummy - Google Patents
Compressor comprising a piston dummy Download PDFInfo
- Publication number
- US20120134851A1 US20120134851A1 US13/263,791 US201013263791A US2012134851A1 US 20120134851 A1 US20120134851 A1 US 20120134851A1 US 201013263791 A US201013263791 A US 201013263791A US 2012134851 A1 US2012134851 A1 US 2012134851A1
- Authority
- US
- United States
- Prior art keywords
- piston
- liquid
- dummy
- compressor
- piston dummy
- 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.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F1/00—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped
- F04F1/06—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped
- F04F1/14—Pumps using positively or negatively pressurised fluid medium acting directly on the liquid to be pumped the fluid medium acting on the surface of the liquid to be pumped adapted to pump specific liquids, e.g. corrosive or hot liquids
Definitions
- the invention relates to a compressor, comprising a liquid or liquid column acting as piston which is displaceable in the piston chamber.
- Generic compressors which serve for the compression of gaseous media, such as for example hydrogen and natural gas up to pressures of 1.000 bar, are also called pistonless compressors, since within the piston chamber or cylinder, no conventional piston, but a liquid or liquid column is displaceably arranged.
- a piston is known for example from the German Patent Application 102004046316.
- the liquid used in such compressors is preferentially an ionic liquid which on the one hand does not dissolve in the medium to be compressed and on the other hand can be separated from the medium to be compressed without any residue.
- other liquids can also be employed for example high-boiling hydraulic oils, vacuum oils or other high-boiling liquids with low medium solution.
- the object of the present invention is to state a generic compressor, with which the cooling output or effect particularly in the region of the top dead centre can be improved and because of this the efficiency of the compressor increased.
- a generic compressor comprising a liquid displaceable in the piston chamber and acting as piston is proposed, which is characterized in that in the liquid a piston dummy that can be displaced with the liquid is arranged.
- FIGS. 1 to 3 show a lateral sectional representation through a possible embodiment of the compressor according to the invention which is not to scale, wherein the FIG. 1 shows the situation at the start of a compression stroke, FIG. 2 the situation at the end of a compression stroke and FIG. 3 the situation during the intake stroke.
- the compressor according to the invention comprises a piston 1 defining a piston chamber 2 .
- a liquid 3 forming a liquid column which preferentially is an ionic liquid, is arranged.
- the liquid column 3 is moved up and down within the piston chamber 2 .
- at least one suction valve 6 and at least one delivery valve 7 are provided on the cylinder head.
- a piston dummy 5 designed in one or multiple pieces is now arranged within the liquid 3 .
- the liquid 3 circulates about this piston dummy 5 so that any seals of the hydraulic piston 4 to be provided if applicable are in contact with the liquid 3 at all times.
- the piston dummy 5 has at least approximately the shape of the cylinder or piston chamber 2 .
- the piston chamber 2 preferentially has an inner contour that is optimized with respect to flow and/or cooling.
- the aforementioned suction valves 6 and delivery valves 7 are advantageously arranged in such a manner that they support the cooling process.
- the bottom of the piston dummy 5 is preferentially designed in such a manner that the liquid 3 is held or accelerated in the region of the piston dummy bottom.
- the liquid 3 is moved up jointly with the piston dummy 5 . Since the contour of the piston dummy 5 is matched to the head region of the piston interior an acceleration of the liquid 3 in the ring gap 8 defined by the piston dummy 5 and the piston chamber wall is achieved when the piston dummy 5 approaches the top dead centre. This acceleration of the liquid 3 results in that the liquid 3 comes into contact with the cylinder head to be cooled than with the compressor designs that count among the prior art. Because of the acceleration of the liquid 3 in the ring gap 8 a turbulent flow in the liquid 3 is additionally formed which has an additional cooling effect as a consequence.
- the shape of the piston dummy 5 is substantially defined by the shape of the piston interior 2 in its upper region. In principle, however, a multiplicity of different piston dummy shapes can be realized in practice.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A compressor comprising a liquid acting as piston that is displaceable in the piston compartment is described.
According to the invention, a piston dummy (5) that can be displaced with the liquid (3) is arranged in the liquid.
This piston dummy (5) is preferentially designed in such a manner that upon reaching the top dead centre it brings about an acceleration of the liquid (3) in the ring gap defined by said piston dummy and the piston chamber wall.
Description
- The invention relates to a compressor, comprising a liquid or liquid column acting as piston which is displaceable in the piston chamber.
- Generic compressors, which serve for the compression of gaseous media, such as for example hydrogen and natural gas up to pressures of 1.000 bar, are also called pistonless compressors, since within the piston chamber or cylinder, no conventional piston, but a liquid or liquid column is displaceably arranged. Such a piston is known for example from the German Patent Application 102004046316.
- The liquid used in such compressors is preferentially an ionic liquid which on the one hand does not dissolve in the medium to be compressed and on the other hand can be separated from the medium to be compressed without any residue. In principle, however, other liquids can also be employed for example high-boiling hydraulic oils, vacuum oils or other high-boiling liquids with low medium solution.
- Currently, generic compressors are cooled by the hydraulic liquid itself. If no adequate cooling effect can be achieved with said hydraulic liquid, an additional exterior cooling, for example in the form of a cooling jacket, is realized as a rule.
- In order to be able to guarantee an unintentional discharge of the liquid with the compressed medium via the delivery valve and/or a preferably favorable dead space optimization, attempts have been made up to now to keep the surface of the liquid as smooth as possible. However, the heat transfer and thus the cooling effect upon the surface contact are reduced. This results in that the hottest part of the compressor—that is the region of the piston chamber in which the top dead centre is located—is cooled the least. However, this has the disadvantage that in particular the heat development in the top dead centre of the compressor reduces the thermal efficiency of the compression process.
- The object of the present invention is to state a generic compressor, with which the cooling output or effect particularly in the region of the top dead centre can be improved and because of this the efficiency of the compressor increased. For solving this object, a generic compressor comprising a liquid displaceable in the piston chamber and acting as piston is proposed, which is characterized in that in the liquid a piston dummy that can be displaced with the liquid is arranged.
- Further advantageous configurations of the compressor according to the invention, which constitute subjects of the dependent claims are characterized in that
-
- the piston dummy is designed in such a manner that upon reaching the top dead centre it brings about an acceleration of the liquid in the ring gap defined by the dummy and the piston chamber wall,
- the bottom of the piston dummy is designed in such a manner that the liquid is held or accelerated in the region of the piston dummy bottom,
- the piston dummy is designed in one or multiple pieces and
- the liquid is at least partially an ionic liquid.
- The compressor according to the invention and further advantageous configurations of the compressor are explained in more detail in the following by means of the exemplary embodiment represented in the
FIGS. 1 to 3 . - The
FIGS. 1 to 3 show a lateral sectional representation through a possible embodiment of the compressor according to the invention which is not to scale, wherein theFIG. 1 shows the situation at the start of a compression stroke,FIG. 2 the situation at the end of a compression stroke andFIG. 3 the situation during the intake stroke. - The compressor according to the invention comprises a piston 1 defining a
piston chamber 2. Within the piston chamber 2 aliquid 3 forming a liquid column, which preferentially is an ionic liquid, is arranged. By means of suitable measures—in theFIGS. 1 to 3 represented by ahydraulic piston 4—theliquid column 3 is moved up and down within thepiston chamber 2. On the cylinder head, at least onesuction valve 6 and at least onedelivery valve 7 are provided. - According to the invention a
piston dummy 5 designed in one or multiple pieces is now arranged within theliquid 3. Theliquid 3 circulates about thispiston dummy 5 so that any seals of thehydraulic piston 4 to be provided if applicable are in contact with theliquid 3 at all times. Advantageously, thepiston dummy 5 has at least approximately the shape of the cylinder orpiston chamber 2. Thepiston chamber 2 preferentially has an inner contour that is optimized with respect to flow and/or cooling. Theaforementioned suction valves 6 anddelivery valves 7 are advantageously arranged in such a manner that they support the cooling process. In addition, the bottom of thepiston dummy 5 is preferentially designed in such a manner that theliquid 3 is held or accelerated in the region of the piston dummy bottom. - During a compression stroke, as is represented in the
FIGS. 1 and 2 , theliquid 3 is moved up jointly with thepiston dummy 5. Since the contour of thepiston dummy 5 is matched to the head region of the piston interior an acceleration of theliquid 3 in thering gap 8 defined by thepiston dummy 5 and the piston chamber wall is achieved when thepiston dummy 5 approaches the top dead centre. This acceleration of theliquid 3 results in that theliquid 3 comes into contact with the cylinder head to be cooled than with the compressor designs that count among the prior art. Because of the acceleration of theliquid 3 in the ring gap 8 a turbulent flow in theliquid 3 is additionally formed which has an additional cooling effect as a consequence. - As a rule, on reaching the top dead centre, a part of the
liquid 3 is jointly with the compressed medium delivered out of thepiston chamber 2 via thedelivery valve 7. This concerns the uppermost and thus hottest layer of the liquid column. - Following the closing of the
delivery valve 7 and at the start of the downward movement of theliquid column 3 and of thepiston dummy 5 the rest of the accelerated liquid remaining in the upper region of thepiston chamber 2 again shoots past the upper part of the cylinder head, resulting in an additional increase of the desired cooling effect. - In the case of a favorable configuration of the
piston dummy 5 to be provided according to the invention the uppermost layer of theliquid 3 remains on thepiston dummy 5. This effect occurs particularly with ionic liquids, since the accelerated fluid quantity can no longer dip into the liquid surface. However, this behavior is desired since during the following compression stroke exactly this (hot) liquid quantity is discharged from the piston 1 orpiston chamber 2 via thedelivery valve 7. - It is obvious, that the shape of the
piston dummy 5 is substantially defined by the shape of thepiston interior 2 in its upper region. In principle, however, a multiplicity of different piston dummy shapes can be realized in practice. - By means of the compressor concept according to the invention, a better cooling of the piston head or cylinder head, particularly in the region of the top dead centre, is achieved. This results in a reduction of the compression temperature and thus of the required compression energy. Consequently the efficiency of the compressor according to the invention increases compared with an otherwise identical compressor with which the piston dummy to be provided according to the invention is omitted.
Claims (5)
1. A compressor, comprising a liquid displaceable in a the piston chamber acting as piston, characterized in that in the liquid a piston dummy that can be displaced with said liquid is arranged.
2. The compressor as claimed in claim 1 , characterized in that the piston dummy is designed in such a manner that upon reaching top dead centre it causes an acceleration of the liquid in a ring gap defined by said piston dummy and a the piston chamber wall.
3. The compressor as claimed in claim 1 , characterized in that a bottom of the piston dummy is designed in such a manner that the liquid is held or accelerated in the region of the piston dummy bottom.
4. The compressor according to claim 1 , characterized in that the piston dummy is comprises one or multiple pieces.
5. The compressor according to claim 1 , characterized in that the liquid at least partially is an ionic liquid.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009020925.5 | 2009-05-12 | ||
DE102009020925A DE102009020925A1 (en) | 2009-05-12 | 2009-05-12 | Compressor with piston dummy |
PCT/EP2010/002735 WO2010130356A1 (en) | 2009-05-12 | 2010-05-04 | Compressor comprising a piston dummy |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120134851A1 true US20120134851A1 (en) | 2012-05-31 |
Family
ID=42830384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/263,791 Abandoned US20120134851A1 (en) | 2009-05-12 | 2010-05-04 | Compressor comprising a piston dummy |
Country Status (8)
Country | Link |
---|---|
US (1) | US20120134851A1 (en) |
EP (1) | EP2430316B1 (en) |
JP (1) | JP5586690B2 (en) |
KR (1) | KR101719532B1 (en) |
CN (1) | CN102422028B (en) |
CA (1) | CA2761615C (en) |
DE (1) | DE102009020925A1 (en) |
WO (1) | WO2010130356A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170016435A1 (en) * | 2015-07-14 | 2017-01-19 | Panasonic Intellectual Property Management Co., Ltd. | Reciprocating compressor and hydrogen supply system |
EP3193113A1 (en) | 2016-01-18 | 2017-07-19 | Cryostar SAS | System for liquefying a gas |
EP3193017A1 (en) | 2016-01-18 | 2017-07-19 | Cryostar SAS | System for supplying compressed gas to several gas-fed devices |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011109499B4 (en) * | 2011-08-04 | 2016-06-02 | Michael Semakin | compressor |
DE102012016222A1 (en) | 2012-08-01 | 2014-02-06 | Technische Universität Dresden | Cylinder-, piston- and valveless, continuously working fluid working machine for e.g. dosing liquid in chemical system during plastic production, has blocking region, where portions of liquids slide from region side to region opposite side |
DE102017007921A1 (en) * | 2017-08-22 | 2019-02-28 | Linde Aktiengesellschaft | Method for operating a compressor and compressor |
KR102503493B1 (en) | 2021-06-14 | 2023-02-28 | (주)부흥산업사 | Compressor Structure Using Ionic Liquid |
KR102662208B1 (en) | 2022-03-25 | 2024-05-03 | (주)부흥산업사 | Piston Ring Manufacturing Method Containing Ionic Liquid And Structure Of Compressor Or Vacuum Pump Using The Same |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US400668A (en) * | 1889-04-02 | Vacuum-pump | ||
US1436443A (en) * | 1919-09-03 | 1922-11-21 | Bradford B Holmes | Pump |
US2121534A (en) * | 1936-07-02 | 1938-06-21 | Westinghouse Air Brake Co | Fluid compressor |
US4428276A (en) * | 1981-10-19 | 1984-01-31 | Humphrey Products Company | O-Ring seal for piston of double-acting fluid pressure cylinder |
US5063881A (en) * | 1989-07-17 | 1991-11-12 | Isuzu Motors Limited | Ceramic engine |
US6962213B2 (en) * | 2003-02-19 | 2005-11-08 | Hartwick Patrick W | Sleeve piston fluid motor |
US20100034671A1 (en) * | 2006-09-13 | 2010-02-11 | Robert Adler | Pistonless compressor |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3577880A (en) * | 1968-02-02 | 1971-05-11 | Anglo Amer Corp South Africa | Means for varying the physical conditions of a gas |
JPH02298700A (en) * | 1990-04-10 | 1990-12-11 | Suke Ishii | Pneumatic compressor with liquid pressure |
WO2003074840A2 (en) * | 2002-02-28 | 2003-09-12 | Nikolay Shkolnik | Liquid piston internal combustion power system |
US7488159B2 (en) * | 2004-06-25 | 2009-02-10 | Air Products And Chemicals, Inc. | Zero-clearance ultra-high-pressure gas compressor |
DE102004046316A1 (en) * | 2004-09-24 | 2006-03-30 | Linde Ag | Method and apparatus for compressing a gaseous medium |
DE102005038268A1 (en) * | 2005-08-12 | 2007-02-15 | Linde Ag | Pistonless compressor |
DE102006040785A1 (en) * | 2006-08-31 | 2008-03-06 | Linde Ag | Pistonless compressor |
JP4828371B2 (en) * | 2006-10-23 | 2011-11-30 | ボッシュ・レックスロス株式会社 | Axial piston pump / motor |
-
2009
- 2009-05-12 DE DE102009020925A patent/DE102009020925A1/en not_active Withdrawn
-
2010
- 2010-05-04 US US13/263,791 patent/US20120134851A1/en not_active Abandoned
- 2010-05-04 EP EP10720882.9A patent/EP2430316B1/en active Active
- 2010-05-04 JP JP2012510140A patent/JP5586690B2/en active Active
- 2010-05-04 WO PCT/EP2010/002735 patent/WO2010130356A1/en active Application Filing
- 2010-05-04 KR KR1020117029717A patent/KR101719532B1/en active IP Right Grant
- 2010-05-04 CN CN201080020456.4A patent/CN102422028B/en active Active
- 2010-05-04 CA CA2761615A patent/CA2761615C/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US400668A (en) * | 1889-04-02 | Vacuum-pump | ||
US1436443A (en) * | 1919-09-03 | 1922-11-21 | Bradford B Holmes | Pump |
US2121534A (en) * | 1936-07-02 | 1938-06-21 | Westinghouse Air Brake Co | Fluid compressor |
US4428276A (en) * | 1981-10-19 | 1984-01-31 | Humphrey Products Company | O-Ring seal for piston of double-acting fluid pressure cylinder |
US5063881A (en) * | 1989-07-17 | 1991-11-12 | Isuzu Motors Limited | Ceramic engine |
US6962213B2 (en) * | 2003-02-19 | 2005-11-08 | Hartwick Patrick W | Sleeve piston fluid motor |
US20100034671A1 (en) * | 2006-09-13 | 2010-02-11 | Robert Adler | Pistonless compressor |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20170016435A1 (en) * | 2015-07-14 | 2017-01-19 | Panasonic Intellectual Property Management Co., Ltd. | Reciprocating compressor and hydrogen supply system |
US10385836B2 (en) * | 2015-07-14 | 2019-08-20 | Panasonic Intellectual Property Management Co., Ltd. | Reciprocating compressor and hydrogen supply system |
EP3193113A1 (en) | 2016-01-18 | 2017-07-19 | Cryostar SAS | System for liquefying a gas |
EP3193017A1 (en) | 2016-01-18 | 2017-07-19 | Cryostar SAS | System for supplying compressed gas to several gas-fed devices |
WO2017125275A1 (en) | 2016-01-18 | 2017-07-27 | Cryostar Sas | System for liquefying a gas |
US20190056174A1 (en) * | 2016-01-18 | 2019-02-21 | Cryostar Sas | System for liquefying a gas |
EP3193113B1 (en) * | 2016-01-18 | 2019-05-29 | Cryostar SAS | System for liquefying a gas |
US10801775B2 (en) * | 2016-01-18 | 2020-10-13 | Cryostar Sas | System for liquefying a gas |
Also Published As
Publication number | Publication date |
---|---|
JP2012526940A (en) | 2012-11-01 |
WO2010130356A1 (en) | 2010-11-18 |
DE102009020925A1 (en) | 2010-11-18 |
CA2761615C (en) | 2016-10-04 |
EP2430316A1 (en) | 2012-03-21 |
CN102422028A (en) | 2012-04-18 |
KR20120017068A (en) | 2012-02-27 |
KR101719532B1 (en) | 2017-03-24 |
CN102422028B (en) | 2014-12-24 |
CA2761615A1 (en) | 2010-11-18 |
JP5586690B2 (en) | 2014-09-10 |
EP2430316B1 (en) | 2014-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: LINDE AKTIENGESELLSCHAFT, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ADLER, ROBERT;MAYER, HELMUT;MAYER, MARKUS;AND OTHERS;SIGNING DATES FROM 20111015 TO 20111219;REEL/FRAME:027507/0299 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |