EP1806503B1 - Booster-type gas compressor - Google Patents
Booster-type gas compressor Download PDFInfo
- Publication number
- EP1806503B1 EP1806503B1 EP07000101A EP07000101A EP1806503B1 EP 1806503 B1 EP1806503 B1 EP 1806503B1 EP 07000101 A EP07000101 A EP 07000101A EP 07000101 A EP07000101 A EP 07000101A EP 1806503 B1 EP1806503 B1 EP 1806503B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- case
- crank
- compressed
- piston
- gas
- 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.)
- Expired - Fee Related
Links
Images
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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/128—Crankcases
-
- 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
-
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/121—Casings
-
- 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
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/123—Fluid connections
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/02—Stopping, starting, unloading or idling control
- F04B49/022—Stopping, starting, unloading or idling control by means of pressure
-
- 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
- F04B2205/00—Fluid parameters
- F04B2205/18—Pressure in a control cylinder/piston unit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2210/00—Working fluid
- F05B2210/10—Kind or type
- F05B2210/12—Kind or type gaseous, i.e. compressible
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
Description
- The present invention relates to a booster-type gas compressor in which a compressed gas is further compressed by a reciprocating piston.
- As shown in
Fig. 4 , asuction valve 23 is provided at one side of atop wall 22 of acylinder 21 and adischarge valve 24 is provided at the other side of thetop wall 22. Above thesuction valve 23 and thedischarge valve 24, there are asuction chamber 26 having aninlet 25 and adischarge chamber 28 having anoutlet 27 respectively. Under thecylinder 21, acrank shaft 31 integrally formed with adriving shaft 30 in acrank case 29 is provided. The drivingshaft 30 is driven by anelectric motor 34 in amotor case 33 mounted to aside wall 29a of thecrank case 29 so that a gas may pass through. Apiston 39 is moved up and down in acylinder 21 via apiston rod 35 by thecrank shaft 31 formed with the drivingshaft 30 to compress a gas such as N2 introduced in a compressing chamber above thepiston 36 via thesuction valve 23 and to discharge it from thedischarge valve 24 andoutlet 27. - In such a reciprocating-piston-type gas compressor, with reciprocating motion of the
piston 36, a compressed gas in the compressing chamber above thepiston 36 in thecylinder 21 partially leaks through around thepiston 36 into thecrank case 29. - The compressed gas in the
crank case 29 Is partially discharged from anair hole 38 of thecrank case 29 to produce loss of energy. Leak of a toxic gas causes air pollution. - Furthermore, in case that such a reciprocating-piston-type gas compressor comprises a booster-type gas compressor sucking a compressed gas and compressing it to higher pressure, in a suction step of restarting or unloading operation, the compressing chamber becomes decompression condition in which a atmospheric pressure gas from an
air hole 38 of thecrank case 29 flows through around thepiston 36 to the compressing chamber above thepiston 36 and is mixed in a gas from thesuction hole 25 to render density lowered. - To cool the
electric motor 34, aventilating hole 39 is formed in theelectric motor case 33 or a fan is mounted to the drivingshaft 30 to achieve forcing cooling. Thus, theelectric motor 34 cannot be completely sealed to render noise leaked or dusts, and solid ingredients in external air are likely to remain in theelectric motor 34 ormotor case 33. - Furthermore, in such a booster-type gas compressor, atmospheric pressure remains in the
crank case 29. So, owing to pressure difference above and under thepiston 36, torque variation in one rotation becomes greater to increase an electric current of theelectric motor 34 directly mounted to thecrank case 29 to speed up damages on the outer circumferential surface of thepiston 36, a piston ring, thedriving shaft 30,bearings crank shaft 31 and a seal of a sliding portion. -
DE -A1-3536618 discloses a lifting-piston compressor according to the preamble of claim 1 which is intended in particular as a booster compressor for compressed-gas installations. The piston of the compressor is connected via a push-rod to a crank shaft which rotates in a crank housing using a drive arrangement. The crank housing interior is drawn off via at least one further compression stage in order to perform a pressure-relief action of the crank housing interior, and the outlet side of the further compression stage is connected to the inlet of the lifting piston compressor. As a result, the gases of the further compression stage emerging at the outlet are guided back again to the inlet of the booster-type compressor. -
JP-A-05157050 -
EP-A-1116883 discloses a swash-plate compressor driven by an electric motor. The refrigerant is drawn from an intake port to the suction chamber and discharged into an intermediate pressure chamber. From there the refrigerant is partly bypassed into the crank chamber and then circulated into the motor chamber for cooling of the electric motor. - An object of the present invention is to provide a booster-type gas compressor comprising a reciprocating piston, pressure difference being reduced between a compressing chamber above the piston and a crank case under the piston thereby preventing wear of each part and unsmoothness of the operation.
- The features and advantages of the invention will become more apparent from the following description with respect to embodiments as shown in accompanying drawings wherein:
-
Fig. 1 is a vertical sectional view of the first embodiment of a booster-type gas compressor according to the present invention; -
Fig. 2 is a vertical sectional view of the second embodiment of a booster-type gas compressor according to the present invention; -
Fig. 3 is a vertical sectional view of the third embodiment of a booster-type gas compressor according to the present invention; and -
Fig. 4 is a vertical sectional view of a known booster-type gas compressor -
Fig. 1 shows the first embodiment of a booster-type gas compressor according to the present invention. - The basic structure of the booster-type gas compressor is not so different from that in
Fig. 4 . The same numerals are allotted to the same members. Its description is omitted and only differences are described. - In
Fig. 1 , there is noair hole 38 communicating external air and a compressed-gas introducing hole 11 is formed in anelectric motor case 36 instead of a ventilating hole. - A compressed-
gas feeding path 37 is connected to a compressed-gas introducing hole 11 via abypath conduit 14 comprising acheck valve 12 that closes towards the compressed-gas feeding path 37 and opens in an opposite direction and apressurre regulator 13 such as a pressure-regulating valve or a pressure reducing valve. - By opening a valve (not shown), a compressed gas is fed into a
suction chamber 26 and partially introduced into thecrank case 29 via thebypath conduit 14 comprising thecheck valve 12 and thepressure regulator 13, the compressed-gas introducing hole 11. amotor case 33 and a communicatinghole 32 to let the inside of thecrank case 29 compressed to more than atmospheric pressure. - The compressed gas in the compressed-
gas feeding path 37 is partially fed into thecrank case 29, so that gas pressure in thecrank case 29 becomes more than atmospheric pressure different from a known device. - Thus, difference in pressure between a compressing chamber above a
piston 36 in acylinder 21 and the inside of thecrank case 29 becomes smaller than that in a known device, thereby preventing sliding of thepiston 36 from lacking smoothness and preventing each of thebearings - By the
pressure regulator 13, pressure of a compressed gas in thecrank case 29 is regulated, so that pressure difference from a compression chamber above thepiston 37 is regulated as soon as possible thereby achieving stable performance. - As shown in
Fig. 2 , apressure regulator 15 may be directly joined to the crank case. Thepressure regulator 15 may be a reserve tank comprising a pressure-regulating valve and a check valve thereby achieving similar advantage to that inFig. 1 . - In
Fig. 3 , a compressed-gas feeding path 37 is connected to a compressed-gas introducing hole 11 of amotor case 33 via abypath conduit 14 comprising acheck valve 12 that closes towards the compressed-gas feeding path 37 and opens in an opposite direction. Apressure regulator 13 is provided on the compressed-gas feeding path 37 between thebypath conduit 14 and asuction valve 23 thereby achieving similar advantage to that inFig. 1 . - The foregoing merely relates to embodiments of the invention. Various changes and modifications may be made by a person skilled in the art without departing from the scope of claims.
Claims (5)
- A booster-type gas compressor comprising:a crank case (29);a crank shaft (31) in the crank case (29);a driving shaft (3) integrally connected to the crank shaft (31);a cylinder (21);a piston (36) in the cylinder (21);a piston rod (35) joined to the piston (36) at an upper end and to the crank shaft (31) at a lower end; anda compressed-gas flow path (37) that feeds a compressed gas into a compressing chamber above the piston (36) to further compress the compressed gas, characterized in that:a motor case (33) is provided communicating with the crank case (29),an electric motor (34) is joined to the driving shaft (3) to drive the driving shaft (30) in the motor case (33);and in that:the compressed-gas flow path (37) is connected to a hole (11) of the motor case (33) via a bypath conduit (14) to allow the compressed gas to flow into the crank case (29) via the motor case (33) to keep pressure in the crank case (29) to more than atmospheric pressure, while the electric motor (34) in the motor case (33) is cooled by the compressed gas flowing through the motor case (33).
- A compressor of claim 1, wherein the motor case (33) communicates with the crank case (29) via a communicating hole (32) through a wall between the motor case (33) and the crank case (29) to allow the compressed gas to flow from the motor case (33) to the crank case (29).
- A compressor of claim 1, further comprising a pressure regulator (13) at the bypath conduit (14).
- A compressor of claim 3, further comprising another pressure regulator (15) on the crank case (29).
- A compressor of claim 1, further comprising a pressure regulator (13) at the compressed-gas flow path (37) between the bypath conduit (14) and the cylinder (21).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006002211A JP2007182821A (en) | 2006-01-10 | 2006-01-10 | Booster type gas compressor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1806503A1 EP1806503A1 (en) | 2007-07-11 |
EP1806503B1 true EP1806503B1 (en) | 2009-03-11 |
Family
ID=37761940
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07000101A Expired - Fee Related EP1806503B1 (en) | 2006-01-10 | 2007-01-04 | Booster-type gas compressor |
Country Status (5)
Country | Link |
---|---|
US (1) | US20070160483A1 (en) |
EP (1) | EP1806503B1 (en) |
JP (1) | JP2007182821A (en) |
KR (1) | KR100815538B1 (en) |
CN (1) | CN101000048A (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007042318B4 (en) * | 2007-09-06 | 2017-11-30 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Compact dry running piston compressor |
DE102008049238A1 (en) * | 2008-05-30 | 2009-12-03 | Wabco Gmbh | Device for operating an auxiliary unit of a vehicle, in particular utility vehicle |
JP5193762B2 (en) * | 2008-09-04 | 2013-05-08 | 株式会社日立産機システム | Booster compressor |
US20110076164A1 (en) * | 2009-09-25 | 2011-03-31 | Wen San Chou | Air compressor having tilted piston |
JP5412243B2 (en) * | 2009-11-06 | 2014-02-12 | 株式会社日立産機システム | Booster compressor |
JP5412248B2 (en) * | 2009-11-18 | 2014-02-12 | 株式会社日立産機システム | Compressor |
US9422928B2 (en) | 2010-08-27 | 2016-08-23 | Koninklijke Philips N.V. | Electric motor thermal energy isolation |
JP5374524B2 (en) * | 2011-01-26 | 2013-12-25 | 住友ゴム工業株式会社 | Compressor device |
KR101264371B1 (en) | 2012-04-20 | 2013-05-14 | 진권 | High-pressure gas producing piston type compressor |
JP5668093B2 (en) * | 2013-04-22 | 2015-02-12 | 株式会社日立産機システム | Booster compressor |
JP6170396B2 (en) * | 2013-09-27 | 2017-07-26 | アネスト岩田株式会社 | Pressurized booster compressor |
CN108374774A (en) * | 2018-03-27 | 2018-08-07 | 习水县文雄水利动力科技有限公司 | A kind of piston type draws water/air pump |
CN108869235A (en) * | 2018-07-04 | 2018-11-23 | 蚌埠艾普压缩机制造有限公司 | A kind of pressure adjusting cylinder for hydrogenation stations high pressure hydrogen compressor |
CN111852816A (en) * | 2020-06-04 | 2020-10-30 | 聂伦喜 | Natural gas depressurization machine |
GB2610423A (en) * | 2021-09-06 | 2023-03-08 | Gardner Denver Ltd | An improved reciprocating compressor |
WO2023101771A1 (en) * | 2021-12-03 | 2023-06-08 | Energy Recovery, Inc. | Fluid handling systems including a compressor |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3123287A (en) * | 1964-03-03 | figure | ||
US1874752A (en) * | 1930-06-13 | 1932-08-30 | Worthington Pump & Mach Corp | Air or gas compressor |
US2295790A (en) * | 1940-07-30 | 1942-09-15 | Bennie R Hopkins | Vacuum pressure pump |
US2323068A (en) * | 1941-03-29 | 1943-06-29 | Maniscalco Pictro | Compressor |
GB1244105A (en) * | 1969-02-04 | 1971-08-25 | Bitzer Kuehlmaschb G M B H | Reciprocating piston compressors |
JPS6032983A (en) * | 1983-07-31 | 1985-02-20 | Natl House Ind Co Ltd | Air pressure boosting device |
JPS60118386A (en) * | 1983-11-30 | 1985-06-25 | Sumitomo Metal Ind Ltd | Submerged arc welding method |
DE3536618A1 (en) * | 1985-10-15 | 1987-04-16 | Bauer Kompressoren | Lifting-piston compressor, in particular booster compressor for compressed gas installations |
JPH01257780A (en) * | 1988-04-05 | 1989-10-13 | Mitsubishi Electric Corp | Reciprocating compressor |
JPH02110278A (en) * | 1989-09-01 | 1990-04-23 | Hitachi Ltd | Storage case for refrigerator |
JPH05157050A (en) * | 1991-10-09 | 1993-06-22 | Mitsubishi Heavy Ind Ltd | Open compressor for freezing and air-conditioning |
JP2001193639A (en) * | 2000-01-11 | 2001-07-17 | Toyota Autom Loom Works Ltd | Motor-driven swash plate compressor |
US6652250B2 (en) * | 2000-10-16 | 2003-11-25 | Kobe Steel, Ltd. | Screw compressor having intermediate shaft bearing |
-
2006
- 2006-01-10 JP JP2006002211A patent/JP2007182821A/en active Pending
- 2006-12-30 CN CNA2006101722513A patent/CN101000048A/en active Pending
-
2007
- 2007-01-04 EP EP07000101A patent/EP1806503B1/en not_active Expired - Fee Related
- 2007-01-08 KR KR1020070002096A patent/KR100815538B1/en active IP Right Grant
- 2007-01-10 US US11/621,732 patent/US20070160483A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
KR100815538B1 (en) | 2008-03-20 |
CN101000048A (en) | 2007-07-18 |
KR20070075298A (en) | 2007-07-18 |
JP2007182821A (en) | 2007-07-19 |
EP1806503A1 (en) | 2007-07-11 |
US20070160483A1 (en) | 2007-07-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1806503B1 (en) | Booster-type gas compressor | |
US20070041847A1 (en) | Piston-reciprocating gas compressor | |
EP1806502A2 (en) | Booster compressor | |
US6796215B1 (en) | Membrane pump | |
WO2012120964A1 (en) | Valve device for compressor | |
JP4411753B2 (en) | Oil-free screw compressor | |
CA2662495C (en) | Oil-free air compressor system with inlet throttle | |
US20090047159A1 (en) | Multi-stage gas compressing apparatus | |
KR101253086B1 (en) | Energy saving device for oil injection type screw compressor | |
US20070041858A1 (en) | Booster-type compressor | |
KR20140083757A (en) | Air supply device using compressed stored hydrogen and air supply system including the same | |
EP0926342B1 (en) | Seal mechanism protector for compressors | |
US6871512B2 (en) | Motor-driven compressor | |
CN100434707C (en) | Capacity-changing unit of orbiting vane compressor | |
CN112594153B (en) | Energy-saving gas oil-free compressor and multi-stage compression structure thereof | |
KR20070021931A (en) | Piston-reciprocating gas compressor | |
JP4015219B2 (en) | Air compressor load reducing device | |
CN213928729U (en) | Scroll compressor | |
JP4350603B2 (en) | Gas compressor | |
CN115318072B (en) | Double-drum dryer, gas drying method and portable gas compression supply device | |
KR102150374B1 (en) | Performance improvement structure of a large-capacity air compressor with a slit browing on suction duct | |
US20220314938A1 (en) | Compressor unit | |
CN112524022A (en) | Scroll compressor | |
JP2002115663A (en) | High pressure compression facility and no-load operation method therefor | |
CN117052637A (en) | Compressor and compression method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20070104 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR |
|
AX | Request for extension of the european patent |
Extension state: AL BA HR MK YU |
|
17Q | First examination report despatched |
Effective date: 20070920 |
|
AKX | Designation fees paid |
Designated state(s): BE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20091214 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20180119 Year of fee payment: 12 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20190131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20190131 |