EP0000611A1 - Kolbenverdichter zum Füllen von Taucheratemluftzylinder - Google Patents

Kolbenverdichter zum Füllen von Taucheratemluftzylinder Download PDF

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Publication number
EP0000611A1
EP0000611A1 EP78200115A EP78200115A EP0000611A1 EP 0000611 A1 EP0000611 A1 EP 0000611A1 EP 78200115 A EP78200115 A EP 78200115A EP 78200115 A EP78200115 A EP 78200115A EP 0000611 A1 EP0000611 A1 EP 0000611A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
chamber
bore
sealing means
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.)
Withdrawn
Application number
EP78200115A
Other languages
English (en)
French (fr)
Inventor
Jörgen Reimer Meilstrup
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0000611A1 publication Critical patent/EP0000611A1/de
Withdrawn legal-status Critical Current

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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
    • F04B39/04—Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041—Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • 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

Definitions

  • This invention relates to piston compressors of the type referred to in the introductory clause of claim 1.
  • Normally high pressure compressors adapted to produce an air pressure of more than one hundred of atm are made as multi stage compressors having a differential piston comprising a broad piston portion working in a correspondingly wide cylinder portion for producing a precompression, and a so-called steeple piston projecting from the broad piston into a narrow cylinder portion, in which the steeple piston serves to compress the air as precompressed in said wide cylinder portion, the air being transferred from the wide cylinder portion to the steeple cylinder through suitable valve and tube means normally including means for cooling of the precompressed air.
  • the piston is mountable on the broad piston so as to be reciprocated together therewith; this involves a relatively long working stroke, and since in the final compression stage a reduced volume of air is handled, the cylinder should be correspondingly narrow.
  • the volume of the larger chamber will be reduced more than the volume of the smaller chamber is increased, and a resulting compression action is obtained.
  • the said smaller chamber represents a dead space which will normally be far too large for high compression purposes, and though such a differential compressor type is of simple design due to the cylinder and the piston having at least substantially the same diameters throughout their lengths, it has been preferred to use the much more expensive system comprising the said steeple piston.
  • This invention is based on the cognition that it is possible to increase in a simple manner the efficiency of the compressor type in which the compression is effected in an annular cylindrical space about the piston, to such a degree that the said steeple piston arrangement will no longer be required.
  • a compressor of the type referred to which is characterized by the features stated in the characterizing clause of claim 1.
  • the piston sealing ring structure of the cooperating end of the piston may be moved, by the compression stroke of the piston, practically into face-to-face engagement with the fixed sealing means, whereby there will be practically no dead space left between these parts.
  • the space should be connected with exterral inlet and outlet valve means, but the valve means may be arranged, in known manner, so as to give rise to only a very small dead space.
  • the compressor according to the invention is well suited to be designed with a compression chamber at either side of the fixed sealing means, both cooperating with a common, throughgoing plunger piston having sealing ring means at both ends, whereby a simple double stage compressor is provided when the cylinder bore portions at both sides of the fixed sealing means are of mutually different diameters.
  • the piston may be used additionally for serving an ordinary compression chamber adjacent the free end of the piston and a closed end of the cylinder, such that a simple and robust three-stage high pressure compressor may be built from a cylinder block and a piston of substantially uniform cross dimensions along the entire length thereof.
  • the compressor shown comprises a cylinder block 2 having an upper bore 4 and a lower, narrower bore 6 located at either side of a shoulder 8, which constitutes a lower side wall of a holding groove 10 for a sealing ring 12.
  • a cylindrical plunger piston 14 having adjacent its lower end a set of piston rings 16 working in the bore portion 6, and having adjacent its upper end another set of piston rings 18 of increased diameter, working in the upper bore portion 4.
  • the said sealing ring 12 is the uppermost ring in a set of sealing rings 20 mounted in seating grooves in a middle portion of the cylinder 2 and operating to slidingly seal against the cylindrical surface of the piston 14, these rings being of the contraction type as kwnon e.g. from stuffing boxes about piston rods.
  • the lowermost of the rings 20 is designated 22.
  • the bottom of the piston is hinged to a connector rod 24 which in a conventional manner connects the piston with a driving crank (not shown) for reciprocating the piston in the cylinder.
  • the top of the cylinder is closed by a top piece 26.
  • each of these compression chambers is in a manner not shown, but known per se, connected with respective suction and exhaust valve means through channels generally designated 34, such valve means being indicated solely at 36 in the top piece 26.
  • the larger ccmpression chamber 28 is adapted to take in air from the atmosphere and deliver the pre-compressed air to the suction side of the intermediate compression chamber 30, the valve channel 34 of which are located immediately above the sealing ring 12.
  • the exhaust valve of the chamber 30 is connected, through external cooling means (not shown) to the intake valve of the narrow compression chamber 32, the valve channels 34 of which are located immediately underneath the lowermost sealing ring 22 of the fixed ring group 20.
  • the outlet of the chamber 32 may communicate, through the respective exhaust valve, with a connector pipe for connection with a high pressure bottle or cylinder to be filled with compressed air at high pressure.
  • the said crank for driving the piston is so dimensioned that the piston is moved between a first outer position, in which the top of the piston is located close to the top piece 26 and in which the upper piston ring 161 of the bottom ring set 16 is located immediately adjacent the underside of the lower sealing ring 22 of the fixed ring group 20, and an opposite outer position in which the lower piston ring 181 of the upper ring group 18 is located immediately above the uppermost sealing ring 12 of the fixed ring group 20.
  • the compression chamber 28 Adjacent the top of the piston the compression chamber 28 will in the usual manner be downwardly limited by means of the uppermost piston ring, designated 182, of the upper ring group 18, and since the ring 182 is by practical necessity situated somewhat axially spaced below the top surface of the piston itself the chamber 28 will not be able to be reduced to zero by the upstroke of the piston.
  • the chamber is perfectly usable as a precompression stage serving to deliver precompressed air to the intermediate chamber 30.
  • the air will be further compressed by the following downstroke of the piston, not between the ring members 181 -and 12, and here it is important that these ring members are mounted such that they may be moved very closely together to practically eliminate any dead space therebetween.
  • the air as further compressed in the chamber 30 is supplied to the narrow compression chamber 32; wherein the air is still further compressed to a very high pressure when the piston ring 161 is moved upwardly to a position extremely close to a surface engagement with the underside of the lower sealing ring 22 of The fixeo ring group 20.
  • a known compressor type is principally rather similar to the compressor shown in the drawing, but is not provided with the fixed sealing rings 12, 20, 22, whereby a compression chamber 30 is formed direct between the two opposed sets of piston rings 16 and 18, the bore 6 underneath the constriction 8 being only slightly larger than the piston diameter.
  • the entire space underneath the constriction 8, down to the bottom piston rings in the bwermost position of the piston will then constitute the said dead space, which will be of a considerably size.
  • the provision of the fixed sealing rings 20 according to the present invention constitutes an important improvement in this respect, even if it is chosen to mount the uppermost fixed ring 12 in a seating groove spaced slightly below the constriction shoulder 8 between the bore portions 4 and 6.
  • the compressor shown can be manufactured in a relatively simple manner, since both the cylinder and the piston are of substantially uniform width throughout their length.
  • the piston is assembled from a cylindrical tube 38 bottomwise provided with the piston rings 16, an inverted cup shaped bottom piece 40 having a lower edge flange 42 engaging the lower edge of the tube 38, and a cylindrical top piece 44 provided with the upper set of piston rings 18 and forming a piston top of slightly increased diameter.
  • the top piece 44 serves to hold a pair or number of axial bolts 46 screwed down into screw threaded holes in the top side of the bottom piece 40, which is thereby held clamped against the lower edge of the piston tube 38.
  • the compressor is assembled by mounting tie sealing rings 20 in the cylinder and introducing from below the piston tube 38 with its lower piston rings 16 and bottom piece 40; the piston top piece 44 with the piston rings 18 is introduced from above through the opan top end of the cylinder, whereafter the bolts 46 are tightened and the cylinder tope piece 26 is mounted.
  • the compression chamber 30 or particularly 32 which is of primary importance, and of course the invention will also comprise a compresser which is built solely with one or both of these chambers, or which is provided with two cylinders comprising various respective low, intermediate and high pressure chambers, when at least one of these chambers, preferably the last high pressure chamber, is designed in accordance with the principle of the invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
  • Details Of Reciprocating Pumps (AREA)
EP78200115A 1977-07-20 1978-07-20 Kolbenverdichter zum Füllen von Taucheratemluftzylinder Withdrawn EP0000611A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3046177 1977-07-20
GB3046177 1977-07-20

Publications (1)

Publication Number Publication Date
EP0000611A1 true EP0000611A1 (de) 1979-02-07

Family

ID=10308068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78200115A Withdrawn EP0000611A1 (de) 1977-07-20 1978-07-20 Kolbenverdichter zum Füllen von Taucheratemluftzylinder

Country Status (6)

Country Link
EP (1) EP0000611A1 (de)
JP (1) JPS5423209A (de)
DK (1) DK318878A (de)
FI (1) FI782271A (de)
IT (1) IT1097889B (de)
NO (1) NO782488L (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308767A1 (de) * 1987-09-25 1989-03-29 Maschinenfabrik Sulzer-Burckhardt AG Tauchkolbenkompressor
US5540562A (en) * 1994-04-28 1996-07-30 Ashirus Technologies, Inc. Single-piston, multi-mode fluid displacement pump
EP2652330B1 (de) * 2010-12-16 2018-07-25 WABCO GmbH Kompressor, druckluftversorgungsanlage, pneumatisches system und verfahren zum betreiben einer druckluftversorgungsanlage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13273C (de) * P. BROTHERHOOD in Paris Luftkompressionsmaschine, bei welcher die Luft in drei verschiedenen Stadien komprimirt wird
FR349378A (fr) * 1904-03-22 1905-05-26 Charles Guillaume Elwell Système de compresseur d'air à cylindres multiples
GB190910278A (en) * 1909-04-30 1910-03-03 Louis George Stone Improvements in Air and like Fluid Compressors.
US2486598A (en) * 1947-12-13 1949-11-01 Wittemann Company Inc Apparatus for low temperature gas compression
DE2658793A1 (de) * 1975-12-24 1977-07-14 Commw Scient Ind Res Org Hubkolben- und -zylindermaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE13273C (de) * P. BROTHERHOOD in Paris Luftkompressionsmaschine, bei welcher die Luft in drei verschiedenen Stadien komprimirt wird
FR349378A (fr) * 1904-03-22 1905-05-26 Charles Guillaume Elwell Système de compresseur d'air à cylindres multiples
GB190910278A (en) * 1909-04-30 1910-03-03 Louis George Stone Improvements in Air and like Fluid Compressors.
US2486598A (en) * 1947-12-13 1949-11-01 Wittemann Company Inc Apparatus for low temperature gas compression
DE2658793A1 (de) * 1975-12-24 1977-07-14 Commw Scient Ind Res Org Hubkolben- und -zylindermaschine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308767A1 (de) * 1987-09-25 1989-03-29 Maschinenfabrik Sulzer-Burckhardt AG Tauchkolbenkompressor
CH673508A5 (de) * 1987-09-25 1990-03-15 Burckhardt Ag Maschf
US4920862A (en) * 1987-09-25 1990-05-01 Maschinenfabrik Sulzer-Burckhardt Trunk piston compressor
US5540562A (en) * 1994-04-28 1996-07-30 Ashirus Technologies, Inc. Single-piston, multi-mode fluid displacement pump
US5769615A (en) * 1994-04-28 1998-06-23 Giter; Gershon Single-piston fluid displacement pump
EP2652330B1 (de) * 2010-12-16 2018-07-25 WABCO GmbH Kompressor, druckluftversorgungsanlage, pneumatisches system und verfahren zum betreiben einer druckluftversorgungsanlage

Also Published As

Publication number Publication date
FI782271A (fi) 1979-01-21
IT7825844A0 (it) 1978-07-18
IT1097889B (it) 1985-08-31
DK318878A (da) 1979-01-21
JPS5423209A (en) 1979-02-21
NO782488L (no) 1979-01-23

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