US20120134851A1 - Compressor comprising a piston dummy - Google Patents

Compressor comprising a piston dummy Download PDF

Info

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
Application number
US13/263,791
Inventor
Robert Adler
Helmut Mayer
Markus Mayer
Georg Siebert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Linde GmbH
Original Assignee
Linde GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Linde GmbH filed Critical Linde GmbH
Assigned to LINDE AKTIENGESELLSCHAFT reassignment LINDE AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ADLER, ROBERT, MAYER, HELMUT, MAYER, MARKUS, SIEBERT, GEORG
Publication of US20120134851A1 publication Critical patent/US20120134851A1/en
Abandoned legal-status Critical Current

Links

Images

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.

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 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. Within the piston chamber 2 a liquid 3 forming a liquid column, which preferentially is an ionic liquid, is arranged. By means of suitable measures—in the FIGS. 1 to 3 represented by a hydraulic piston 4—the liquid column 3 is moved up and down within the piston chamber 2. On the cylinder head, at least one suction valve 6 and at least one delivery valve 7 are provided.
  • According to the invention 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. Advantageously, 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. In addition, 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.
  • During a compression stroke, as is represented in the FIGS. 1 and 2, 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.
  • As a rule, on reaching the top dead centre, a part of the liquid 3 is jointly with the compressed medium delivered out of the piston chamber 2 via the delivery 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 the liquid column 3 and of the piston dummy 5 the rest of the accelerated liquid remaining in the upper region of the piston 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 the liquid 3 remains on the piston 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 or piston chamber 2 via the delivery valve 7.
  • It is obvious, that 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.
  • 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.
US13/263,791 2009-05-12 2010-05-04 Compressor comprising a piston dummy Abandoned US20120134851A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009020925A DE102009020925A1 (en) 2009-05-12 2009-05-12 Compressor with piston dummy
DE102009020925.5 2009-05-12
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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
KR20230139080A (en) 2022-03-25 2023-10-05 (주)부흥산업사 Piston Ring Manufacturing Method Containing Ionic Liquid And Structure Of Compressor Or Vacuum Pump Using The Same

Citations (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
AU2003224628A1 (en) * 2002-02-28 2003-09-16 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

Patent Citations (7)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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
CN102422028A (en) 2012-04-18
JP2012526940A (en) 2012-11-01
EP2430316A1 (en) 2012-03-21
WO2010130356A1 (en) 2010-11-18
KR20120017068A (en) 2012-02-27
CA2761615A1 (en) 2010-11-18
DE102009020925A1 (en) 2010-11-18
JP5586690B2 (en) 2014-09-10
EP2430316B1 (en) 2014-01-22
KR101719532B1 (en) 2017-03-24
CA2761615C (en) 2016-10-04
CN102422028B (en) 2014-12-24

Similar Documents

Publication Publication Date Title
CA2761615C (en) Compressor with piston dummy
JP2008038658A (en) Gas compressor
EP1418366A1 (en) Fluid cooled diaphragm
US10274230B2 (en) Annular portions protruding from a displacer and expansion space of a cryocooler
EP3521618B1 (en) Reciprocating compressor
US20140208938A1 (en) Cylinder head for a two-stage reciprocating piston compressor
CN110374844B (en) Cooling structure for cylinder cover of diaphragm compressor
EP3242008B2 (en) Piston for internal combustion engine, and cooling channel core
JP2010031843A (en) Cylinder head structure having valve cooling device and valve lubricating device
CN112567134A (en) Cylinder head for compressor
US20170314504A1 (en) Piston for internal combustion engine, and cooling channel core
CN101554655B (en) Cooling system for low pressure casting device
CN105793566B (en) Cylinder head for air compressor
US20080213110A1 (en) Apparatus and Method for Compressing a Cryogenic Media
CN110421138A (en) Casting and forming mold for bicycle brake disc
US20230085780A1 (en) Compression apparatus and filling station comprising such an apparatus
US20230071844A1 (en) Compression apparatus and filling station comprising such an apparatus
JP6666119B2 (en) Fuel pump
JP6911649B2 (en) Multi-stage cold storage refrigerator
CN102536746A (en) Cylinder cover for air-cooled reciprocating piston air compressor
KR20050028345A (en) Head cover of the compressor
JP7328988B2 (en) Horizontal gas compressor with free lift piston
ITFI20090191A1 (en) "COMPRESSOR FOR REFRIGERATION AND / OR CONDITIONING SYSTEMS"
JP2022153208A (en) Cooling device of gas spring
KR20100064993A (en) Check valve of oil jet and method thereof

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