EP1277956B1 - Joint de culasse de compresseur - Google Patents

Joint de culasse de compresseur Download PDF

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Publication number
EP1277956B1
EP1277956B1 EP02255062A EP02255062A EP1277956B1 EP 1277956 B1 EP1277956 B1 EP 1277956B1 EP 02255062 A EP02255062 A EP 02255062A EP 02255062 A EP02255062 A EP 02255062A EP 1277956 B1 EP1277956 B1 EP 1277956B1
Authority
EP
European Patent Office
Prior art keywords
head gasket
fluid channel
head
piston
gasket
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 - Lifetime
Application number
EP02255062A
Other languages
German (de)
English (en)
Other versions
EP1277956A3 (fr
EP1277956A2 (fr
Inventor
Stephen Michael Mcgrath
Michael Chalton Mcgrath
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.)
Archfact Ltd
Original Assignee
Archfact Ltd
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 Archfact Ltd filed Critical Archfact Ltd
Publication of EP1277956A2 publication Critical patent/EP1277956A2/fr
Publication of EP1277956A3 publication Critical patent/EP1277956A3/fr
Application granted granted Critical
Publication of EP1277956B1 publication Critical patent/EP1277956B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/125—Cylinder heads
    • 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
    • F04B35/045—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 using solenoids
    • 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
    • F04B39/0005—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 adaptations of pistons
    • F04B39/0016—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 adaptations of pistons with valve arranged in the piston

Definitions

  • the present invention relates to a gasket and is concerned particularly with a head gasket for an electromagnetic reciprocating compressor for transferring gases such as air.
  • compressor will be used generally hereafter to describe both a positive pressure pump and a vacuum pump.
  • Existing electromagnetic compressors include a cylinder head and a main body formed with a cylinder.
  • the cylinder head is attached to the main body by bolts and a thin lamina sealing head gasket is clamped there between.
  • Within the main body there is a piston assembly comprising a piston head.
  • the piston assembly reciprocates within the cylinder due to an electromagnetic field generated by an electrical coil and a return spring.
  • the piston head is formed with a number of channels that provide fluid communication through the body of the piston head.
  • a one-way flexible flap valve secured to the face of the piston head covers the channels.
  • air is normally drawn into the compressor casing through various ports in the compressor casing.
  • the air preferably passes through a filter medium before entering a piston cylinder.
  • a head gasket for a reciprocating compressor that comprises a cylinder head and a main body containing a piston assembly and piston valve means comprising a flap valve, characterised in that the head gasket is formed with fluid channel means that extends across the radially outermost edge of the flap valve so as to comprise a fluid channel through which fluid can pass as the piston assembly moves away from the cylinder head, the arrangement being such that, in use, the fluid channel means prevents the piston valve means becoming stuck.
  • the fluid channel means is disposed at a radially outermost edge of the flap valve.
  • the fluid channel means is preferably a recess formed by a cut-out extending through the head gasket and a portion of an inner surface of the cylinder head.
  • the cut-out preferably forms a hole that extends through the gasket.
  • the head gasket is preferably formed with a plurality of holes that each extends through the head gasket.
  • the holes preferably each have a circular shaped horizontal cross-section.
  • the head gasket is preferably formed with four holes that are spaced at 90-degree intervals about the vertical central axis of the gasket.
  • the fluid channel means is preferably formed by a raised portion that extends in a direction away from a planar surface of the head gasket.
  • the fluid channel means comprises a plurality of raised portions forming ribs that extend in a direction away from the planar surface of the head gasket.
  • the ribs preferably extend radially across the planar surface of the head gasket.
  • the raised portions forming the ribs are also preferably formed on a second planar surface of the head gasket.
  • the raised portions on one planar surface preferably mirror the raised portions of the second planar surface.
  • a compressor assembly may be adapted so that a main compressor body may be used for different piston and cylinder assemblies, each piston may have a different cross-sectional diameter.
  • the different sizes of piston and cylinder assemblies may be housed within a common main compressor body.
  • the head gasket comprises fluid channel means according to the first embodiment and fluid channel means according to the second embodiment of the present invention.
  • the cut-out recess of the fluid channel means according to the first embodiment is preferably disposed radially outermost of the raised portion of the second embodiment of the present invention.
  • the arrangement of the head gasket of the third embodiment of the present invention is such that in use the fluid channel means according to the first embodiment is used for a first piston arrangement and the fluid channel means according to the second embodiment is used for a second piston arrangement.
  • the diameter of the first piston is greater than the diameter of the second piston.
  • a compressor comprising a head gasket according to the first aspect of the present invention, the arrangement being such that in use fluid is drawn through the fluid channel means of the head gasket by the reciprocating action of the piston assembly.
  • the compressor comprises a piston cylinder formed with fluid duct means, the arrangement being such that a portion of the fluid duct means aligns with a portion of fluid channel means of the head gasket such that there is fluid communication there between.
  • the fluid channel means of the gasket aligns with a portion of fluid duct means formed in a cylinder head of the compressor.
  • an electromagnetic reciprocating compressor 1 comprises a main body 2 of square exterior cross-section transverse to the central axis of the compressor 1 and a cylinder head 3.
  • the cylinder head 3 is bolted onto the main body 2 using threaded bolts 4 with a thin flexible head gasket 5 interposed there between.
  • the compressor 1 comprises a piston assembly 6 that carries an armature 7 and the main body 2 carries stator laminations 8 and electromagnetic coils (not shown).
  • the piston assembly 6 moves in one direction as the armature 7 is driven linearly by the stator laminations 8 and the coils (not shown) and is moved linearly in an opposing direction by the spring 10 in a well-known manner.
  • the reciprocation of the piston assembly 6 is well known to the skilled addressee and therefore further details of the arrangement will not be described.
  • the main body section 2 comprises a piston cylinder section 12.
  • the piston cylinder section 12 is formed with a gas outlet nozzle 16 that extents through the wall of the piston cylinder section 12. Disposed over the outermost end of the outlet is a one-way valve 18.
  • Arrow 15 in Figure 1 diagrammatically shows the path travelled by air which is transported by the compressor 1.
  • a piston head 14 is axially reciprocatingly movable within the cylinder section 12.
  • the radially outermost surface of the head 14 is formed by an annular sleeve 17 of low friction plastics material bonded thereto.
  • the sleeve 17 acts as a piston ring.
  • the piston head 14 is formed with a series of air ducts 20 that extend axially through the piston head 14.
  • the ducts 20 are covered at the face of the piston head 14 by a conventional flexible one-way flap valve 22.
  • the flap valve 22 is a flat annular shape formed with a central circular hole.
  • the flap valve 22 is secured to the face of the piston head 14 by a flat-headed bolt 24.
  • the sleeve 17 extends beyond the piston head 14 and surrounds the radially outermost edge of the flap valve 22.
  • the head gasket 5 is a substantially square shape and is formed with a central hole 29 that has a circular cross-section and; four slots 30 that each extend there through.
  • the four slots 30 have a circular cross-section.
  • the four slots 30 are spaced at intervals of 90-degrees about the central axis 34 of the gasket 5. Located at each corner of the gasket 5 there is a circular hole 36.
  • the bolts 4 that secured the cylinder head 3 to the main body 2 extend through the holes 36.
  • the slots 30 and portions of the face surface of the cylinder head form channel recesses 40.
  • the recesses 40 extend across the edge of the radially inner rim of the piston cylinder section 12.
  • the piston head 14 is at the end point of an upward stroke.
  • the flap valve 22 is disposed substantially adjacent the head gasket 5.
  • the head of the flat-headed bolt 24 is received into a circular recess 42 formed by the hole 29 and the face of the cylinder head 3.
  • the recesses 40 provide air channels through which air can pass so preventing a substantial vacuum build-up forming within the cylinder section and above the piston head 14.
  • the recesses 40 are adjacent the radially outermost edge 22' of the flap valve 22.
  • Figure 5 shows an electromagnetic reciprocating compressor 50 comprising a piston assembly 52 and a piston cylinder section 53.
  • the piston assembly 52 comprises a piston head 54 that has a smaller horizontal diameter compared with the horizontal diameter of the piston head 14 shown in the Figures 1 to 3.
  • the piston cylinder section 53 shown in Figure 5 has a greater wall thickness than the wall thickness of the cylinder section 12 shown in Figures 1 to 3. It is known to use a standard casing or other standard parts for various different compressor designs.
  • the compressor 50 comprises many features and parts that are the same as compressor 1. The same reference numerals have been used in Figure 5 for these common parts and no further description for the common parts is necessary.
  • the gasket 5 can be used for the compressor 1 and the compressor 50.
  • the electromagnetic reciprocating compressor 50 comprises the main body 2 containing a cylinder head 55.
  • the cylinder head 55 is bolted onto the main body 2 using threaded bolts 4 with the thin flexible head gasket 5 interposed there between.
  • the cylinder head 55 is formed with a network of channels to provide fluid communication to the reciprocating piston arrangement. Contained within the channels of the cylinder head 55 is a filter element 56. The filter element 56 is disposed over an interconnecting duct 58 that forms part of the network of channels that provide fluid communication to the reciprocating piston arrangement.
  • a flat circular closure plate 60 is bolted onto the cylinder head 55 using a central threaded bolt 62.
  • the plate is formed with a radial inlet port 64.
  • the cylinder section 53 is formed with four channels 66 that extends through the vertical length of the section 53 and provides fluid communication between the duct 58 and an inner chamber 70 formed in the main body 2.
  • One end of the channel 66 aligns with one of the slots 30 such that fluid communication is provided there between.
  • the piston head 54 is formed with an air duct 72 that extends axially through the piston head 54.
  • the air duct 72 is formed with a lower entry hole 76 that extends radially towards the central axis of the piston head 54.
  • the duct 72 is covered at the face of the piston head 54 by a conventional flexible non-return flap valve 74.
  • the flap valve 74 is secured to the face of the piston head 54.
  • Arrow 80 in Figure 5 diagrammatically shows the path travelled by air that is transported by the compressor 50.
  • a compressor 89 comprising a head gasket 90 according to a second embodiment of the present invention.
  • the head gasket 90 is a substantially square shape and is formed with four slots 30 that each extend there through and a central hole 29 that has a circular cross-section.
  • the four slots 30 have a circular cross-section.
  • the four slots 30 are spaced at intervals of 90-degrees about the central axis 34 of the gasket 90.
  • a circular raised rim 91 surrounds each hole 36.
  • a raised rib 93 extends between each neighbouring rim 91 substantially parallel to the perimeter edge of the gasket 90.
  • Each slot 30 is formed with an annular recess 92 disposed at each end of the slot 30. Surrounding each recess 92 there is a raised circular rim 94. An arcuate raised rim 96 extends between respective neighbouring rims 94. Four raised ribs 98 extend radially inward from the respective circular rims 94 and four raised ribs 99 extend radially inward from the middle point of the respective arcuate rims 96. The raised rims 91, 94, 96 and raised ribs 98, 99 are formed on both sides of the gasket 90.
  • Piston head 100 has a smaller diameter than the diameter of the piston head 14 shown in Figures 1 to 3 and 4a.
  • Piston head 100 has a larger diameter than the diameter of the piston head 54 shown in Figures 5 and 4b.
  • the four ribs 98 and the ribs 99 partially define air channels through which air can pass so preventing a substantial vacuum build-up forming within the cylinder section 12 and above the piston head 100.
  • the four ribs 98 and ribs 99 extend across the radially outermost edge 22' of the flap valve 22.
  • the ribs 98 and 99 help to prevent the flap valve 22 from sticking in the closed condition when the piston head 100 starts to descend.
  • air travels through the ducts 20 between the flap valve 22 and the face of the piston head 100 and the radially outermost edge 22'of the flap valve 22 is forced away from the face of the piston head 100.
  • the air then travels around the radially outermost edge 22' of the flap valve 22 into the recesses formed by the ribs 98, 99 and the piston cylinder section 12.
  • the slots 30 form fluid channel means for the piston assembly comprising the largest piston head 14 as shown in Figure 9 and as previously described with reference to Figures 1 to 4a.
  • each compressor described may be adapted such that it is supplied air from the opposite end of the compressor to that which is described herein.
  • the compressor 1 comprising the largest piston 14 may be supplied with air that is channeled through the cylinder head similar to the arrangement of the compressor 50.
  • the cylinder 12 of the compressor 1 would require a fluid channel formed there through and the gasket 5 would need to be formed with additional holes disposed radially outer of the channel recesses 40. The additional holes would provide fluid communication between the cylinder head and the channel formed in the cylinder 12.
  • the compressor 89 comprising the medium sized piston 14 may be supplied with air that is channelled through the cylinder head similar to the compressor 50.
  • the cylinder 12 of the compressor 1 would require a fluid channel formed there through and the slots 30 would provide fluid communication between the cylinder head and the channel formed in the cylinder 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Claims (19)

  1. Joint de culasse (5,90) pour un compresseur alternatif (1) qui comprend une culasse (3) et un corps principal (2) contenant un dispositif de piston (6) et un dispositif de clapet de piston constitué d'un clapet à battant (22), caractérisé en ce que le joint de culasse (5, 90) comporte un moyen de canalisation de fluide qui s'étend à travers le bord radialement le plus extérieur du clapet à battant de façon à comprendre un canal de fluide par lequel un fluide peut passer lorsque le dispositif de piston (6) s'éloigne de la culasse (3), l'agencement étant tel que, en utilisation, le moyen de canalisation de fluide empêche le collage du dispositif de clapet de piston (22).
  2. Joint de culasse (5, 90) selon la revendication 1, dans lequel le moyen de canalisation de fluide est disposé à un bord radialement le plus extérieur (22') du clapet à battant (22).
  3. Joint de culasse (5) selon la revendication 1 ou la revendication 2, dans lequel le moyen de canalisation de fluide est un évidement (40) formé par une découpe (30) s'étendant à travers le joint de culasse (5) et une partie d'une surface intérieure de la culasse (3).
  4. Joint de culasse (5) selon la revendication 3, dans lequel la découpe définit un trou (30) qui s'étend à travers le joint (5).
  5. Joint de culasse (5) selon la revendication 4, comportant une pluralité de trous (30) dont chacun s'étend à travers le joint de culasse (5).
  6. Joint de culasse (5) selon la revendication 4 ou la revendication 5, dans lequel le trou ou les trous (30) ont chacun une section horizontale circulaire.
  7. Joint de culasse (5) selon une quelconque des revendications 4 à 6, qui comporte quatre trous (30) qui sont espacés à intervalles de 90° autour de l'axe central vertical (34) du joint (5).
  8. Joint de culasse (5) selon la revendication 1 ou la revendication 2, dans lequel le moyen de canalisation de fluide est formé par une partie surélevée qui s'étend dans une direction à l'opposé d'une surface plane du joint de culasse (90).
  9. Joint de culasse (5) selon la revendication 8, dans lequel le moyen de canalisation de fluide comprend une pluralité de parties surélevées formant des nervures (98, 99) qui s'étendent dans une direction à l'opposé de la surface plane du joint de culasse (90).
  10. Joint de culasse (5) selon la revendication 9, dans lequel les nervures (98, 99) s'étendent radialement en travers de la surface plane du joint de culasse (90).
  11. Joint de culasse (5) selon la revendication 9 ou la revendication 10, dans lequel les parties surélevées formant les nervures (98, 99) sont également formées sur une deuxième surface plane du joint de culasse (90).
  12. Joint de culasse (5) selon la revendication 11, dans lequel les parties surélevées (98, 99) sur une première surface plane sont symétriques des parties surélevées (98, 99) de la deuxième surface plane.
  13. Joint de culasse (5) selon la revendication 1 ou la revendication 2, comprenant un moyen de canalisation de fluide selon les revendications 3 à 7 et un moyen de canalisation de fluide selon les revendications 8 à 12.
  14. Joint de culasse (5) selon la revendication 13, dans lequel l'évidement découpé (40) du moyen de canalisation de fluide des revendications 3 à 7 est disposé radialement le plus à l'extérieur de la partie surélevée (98, 99) du moyen de canalisation de fluide des revendications 8 à 12.
  15. Joint de culasse (5) selon la revendication 13 ou la revendication 14, dans lequel l'agencement est tel que, en utilisation, le moyen de canalisation de fluide selon les revendications 3 à 7 est utilisé pour un premier agencement de piston et le moyen de canalisation de fluide selon les revendications 8 à 12 est utilisé pour un deuxième agencement de piston.
  16. Joint de culasse (5) selon la revendication 15, dans lequel le diamètre du premier piston est plus grand que le diamètre du deuxième piston.
  17. Compresseur (1) comprenant un joint de culasse (5, 90) selon une quelconque des revendications 1 à 16, l'agencement étant tel que, en utilisation, un fluide est aspiré dans le moyen de canalisation de fluide du joint de culasse (5, 90) par l'action de mouvement alternatif du dispositif de piston (6).
  18. Compresseur (1) selon la revendication 17, dans lequel le compresseur (1) comprend un cylindre à piston comportant un moyen de canalisation de fluide, l'agencement étant tel qu'une partie de ce moyen de canalisation de fluide s'aligne avec une partie du moyen de canalisation de fluide du joint de culasse (5, 90) de sorte qu'il y ait une communication de fluide entre ces parties.
  19. Compresseur (1) selon la revendication 18, dans lequel le canal de fluide du joint de culasse (5, 90) s'aligne avec une partie d'un moyen de canalisation formé dans une culasse (3) du compresseur (1).
EP02255062A 2001-07-21 2002-07-19 Joint de culasse de compresseur Expired - Lifetime EP1277956B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0117834 2001-07-21
GBGB0117834.2A GB0117834D0 (en) 2001-07-21 2001-07-21 Gasket

Publications (3)

Publication Number Publication Date
EP1277956A2 EP1277956A2 (fr) 2003-01-22
EP1277956A3 EP1277956A3 (fr) 2003-08-27
EP1277956B1 true EP1277956B1 (fr) 2005-06-08

Family

ID=9918959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02255062A Expired - Lifetime EP1277956B1 (fr) 2001-07-21 2002-07-19 Joint de culasse de compresseur

Country Status (5)

Country Link
EP (1) EP1277956B1 (fr)
AT (1) ATE297504T1 (fr)
DE (1) DE60204515T2 (fr)
GB (1) GB0117834D0 (fr)
HK (1) HK1054582A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100486573B1 (ko) * 2002-09-04 2005-05-03 엘지전자 주식회사 왕복동식 압축기
CN100375841C (zh) * 2003-05-20 2008-03-19 乐金电子(天津)电器有限公司 往复式压缩机用排出盖的偏离防止结构
KR100524725B1 (ko) * 2003-08-11 2005-10-31 엘지전자 주식회사 왕복동식 압축기의 소음 저감 장치
BR102014007259A2 (pt) * 2014-03-26 2015-12-08 Whirlpool Sa compressor alternativo provido de arranjo de válvulas de sucção
CN106382203B (zh) * 2016-11-03 2019-01-15 青岛万宝压缩机有限公司 直线压缩机用活塞连接结构及直线压缩机
CN108775278A (zh) * 2018-04-23 2018-11-09 贵州华烽汽车零部件有限公司 便携式制氧机用压缩机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB905095A (en) * 1960-07-06 1962-09-05 Gen Motors France Improved electro-magnetic compressor
DE1276446B (de) * 1961-04-27 1968-08-29 Earl L Sisson Handpumpe
US3877842A (en) * 1970-01-21 1975-04-15 Itt Air pumps
JP2527097B2 (ja) * 1990-10-29 1996-08-21 株式会社豊田自動織機製作所 ピストン式圧縮機
GB9311385D0 (en) * 1993-06-02 1993-07-21 Contech Int Ltd Compressor

Also Published As

Publication number Publication date
GB0117834D0 (en) 2001-09-12
EP1277956A3 (fr) 2003-08-27
DE60204515T2 (de) 2006-05-11
HK1054582A1 (zh) 2003-12-05
DE60204515D1 (de) 2005-07-14
EP1277956A2 (fr) 2003-01-22
ATE297504T1 (de) 2005-06-15

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