US3679333A - Packing for air compressor valve - Google Patents

Packing for air compressor valve Download PDF

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Publication number
US3679333A
US3679333A US3679333DA US3679333A US 3679333 A US3679333 A US 3679333A US 3679333D A US3679333D A US 3679333DA US 3679333 A US3679333 A US 3679333A
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US
United States
Prior art keywords
packing
valve
bore
intake
exhaust
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
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English (en)
Inventor
Bruno Zoppi
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.)
Industrie Magneti Marelli SRL
Marelli Europe SpA
Original Assignee
Magneti Marelli SpA
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Publication date
Application filed by Magneti Marelli SpA filed Critical Magneti Marelli SpA
Application granted granted Critical
Publication of US3679333A publication Critical patent/US3679333A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/08—Check valves with guided rigid valve members shaped as rings
    • 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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/102—Adaptations or arrangements of distribution members the members being disc valves
    • 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
    • F04B39/10—Adaptations or arrangements of distribution members
    • F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural

Definitions

  • the invention is an improved packing for mounting the captured end of each Jan. 12, I970 Italy blade valve.
  • Each p g is comprised ofa id 7 metal sheet and two thin layers of yieldable material on opposite sur- [52] [1.8. CI ..4I7/57I, l37/5I2, 277/71 faces ofthe sheet.
  • the blade is in a recess of and has the Same [51 1 Int. Cl. ..G05d 16/06 thickness as one ofthe thin layers [58] Field of Search ..137/5l2, 454.2, 454.4, 512.4, v 1
  • the present invention relates to improved packings for the blade valve of a flapper type air compressor.
  • the intake and exhaust valves are of the metal blade or flapper type.
  • a compressor usually includes a bored plate, having an inlet bore communicating between the inlet to the compressor and the pumping chamber and an outlet bore communicating between the pumping chamber and the outlet from the compressor.
  • An inlet bore blade valve is positioned adjacent to the surface of the bored plate that faces away from both the inlet and the outlet of the compressor.
  • An outlet bore blade valve is positioned adjacent to the surface of the bored plate that faces toward the compressor inlet and outlet.
  • the outlet bore valve blocks the outlet bore to prevent any back leak of already pumped air.
  • the inlet bore is open so that air may enter the compressor pumping chamber. The incoming air impinges upon the inlet bore valve, which would normally be blocking the inlet bore, and lifts this valve away from the inlet bore, thereby permitting the air to move into the compressor.
  • the inlet bore valve prevents leakage back through the inlet bore, whereby all outlet flow is only through the outlet bore.
  • the outgoing air impinges upon the outlet bore valve, which would normally be blocking the outlet bore, and lifts this valve away from the outlet bore, thereby permitting the expelled air to leave only through the outlet bore.
  • each of the inlet bore blade valve and of the outlet bore blade valve is fixed. The other end is free to shift under the influence of the flowing air.
  • the inlet bore valve is interposed between the bored plate and the cylinder, which contains the moving piston that pumps the air
  • the outlet bore valve is interposed between the same bored plate and the compressor head, which contains the inlet and outlet chambers.
  • Each valve normally seats against the surface of the bored plate and is held in place by packings, which seal the compressor.
  • the thickness of the packing determines the length of the stroke of the free end of the blade valve. The stroke must be limited in order to avoid excessive deflection of the valve, which wouldcause it to unnecessarily rapidly deteriorate.
  • Conventional packings are formed of a thick layer of resilient gasket material, e.g. asbestos, a rubber-asbestos compound, or the like, which is subject to pennanent deformation.
  • gasket material e.g. asbestos, a rubber-asbestos compound, or the like.
  • the packings eventually heat up to such an extent that they partially lose their elasticity.
  • the airtightness of the seal of the compressor may be impaired.
  • the compressor head to compressor cylinder securing bolts must be periodically retightened, typically after a period of from 20 to 30 hours operation, to restore the airtightness of the seal.
  • this retightening also reduces the thickness of the packings, and thereby undesirably decreases the stroke of the blade valves, reducing compressor performance.
  • the present invention overcomes the above-noted drawback of prior packings.
  • one of the blade valves is held between the bored plate and the head of the compressor and the other of the blade valves is held between the bored plate and the cylinder of a piston type air compressor.
  • the present invention is not limited to a compressor where the blade valves are held between the above mentioned elements.
  • the invention is limited only to compressors where the blade valves are held in the above-noted manner with respect to the bored plate.
  • each of the packings for each of the blade valves is comprised of a relatively thick, central sheet of an inflexible, nonpennanently deformable material
  • the entire three element packing has proper thickness to permit the desired extent of lift of the free end of each of the blade valves. Only the outer layers of each packing are permanently deformed during operation of the compressor. Because the relative thicknesses of these layersis small as compared with the thickness of the entire packing, the total deformation of the packing due to operation of the blade valves is small, and the sealing features of the packing are not impaired. Therefore, the initial clamping of the parts of the compressor remains assured for a prolonged period.
  • FIG. 1 is a cross-sectional view through the inlet-outlet end of a compressor, in which the present invention is incorporated;
  • FIG. 2 is a view along the line and in the direction of arrows 2 in FIG. 1;
  • FIG. 3 is a view along the line and in the direction of arrows 3 in FIG. 1;
  • FIG. 4 is an enlarged view of a portion of the compressor in FIG. 1, showing the manner of mounting of the compressor blade valves in accordance with the invention.
  • air compressor 10 is of the conventional piston type, including an elongated hollow cylinder 12, having a sealed reciprocating piston 14 located therein. Conventional means (not shown) reciprocate piston 14. Above piston 14 is compressor pumping chamber 16, which alternately increases and decreases in volume as piston 14, respectively, descends and ascends.
  • compressor head 20 which includes intake chamber 22 that communicates, through inlet conduit 24, with the source of air or other gas to be pumped, and includes exhaust chamber 26 that communicates, through outlet conduit 28, with the means receiving air. Chambers 22, 26 are separated by divider 32, which extends across the entire interior of head 20.
  • Head 20 and its chambers 22, 26 are separated from cylinder pumping chamber 16 by rigid, metallic plate 40, the upper surface 42 of which seals against packing 70, described below. Passing completely through plate 40 are intake bore 44, which joins intake chamber 22 with pumping chamber 16, and exhaust bore 46, which joins pumping chamber l6'with exhaust chamber 26.
  • bore 44 In order to obtain compression, as piston 14 descends enlarging chamber 16, bore 44 must be open to permit air to be drawn into pumping chamber 16 from inlet 24 and bore 46 must be sealed to prevent back leakage of air, which has already passed through exhaust chamber 26. Similarly, as piston 14 ascends, decreasing the volume of chamber 16 and expelling air, bore 46 must be open to permit air to exit through chamber 26 and outlet 28, and bore 44 must be sealed to prevent return of the air in chamber 16 through intake chamber 22.
  • Valve 50 is formed of resilient material and is held at one end 51 and is free to move toward and away from plate 40 at its free opposite end 52.
  • the valve is of a length such that its free end is between the base 53 of the divider 32 of head 20 and plate 40, and these two elements control the maximum stroke of the valve.
  • Valve 50 includes a blocking surface, which seals outlet bore 46.
  • Valve 50 is normally positioned so as to be substantially in engagement with upper surface 42 of bored plate 40, thereby to seal bore 46 when piston 14 descends. Once valve 50 covers bore 46, when piston 14 is descending, thepressure differential between chambers 16 and 26 seals valve 50 against bore 46 to prevent leakage.
  • a similar type of inlet bore blade valve60 seals bore 44 during exhausting of air from pumping chamber 16 when piston 14 is ascending.
  • Valve 60 is comprised of similar material to valve 50 and is held in a manner similar to. blade 50 at one end 61. It has a free shiftable end 62.
  • valve 60 is of a length such that its'free end is between the end surface 63 of cylinder 12 and plate 40 and these two elements control the maximum stroke of the valve.
  • Valve 60 extends past bore 44 and is normally held so as to be substantially in engagement with surface 66 of bored element 40.; When piston 14 ascends, the pressure within chamber 16 exceeds the pressure in intake chamber 22. This pressure differential seals valve 60 against bore 44, ensuring that air exhaust from the compressor is only through exhaust chamber 26. During intake of air into cham ber 16, the pressure in chamber'l6, which-on exhaust'was higher than in intake chamber 22,now is below the pressure in chamber 22. The increased pressure developed in bore 44 shifts valve 60 down from plate surface 66 to its dotted line position in FIG. 1 and permits intake of air through bore 44 into chamber 16.
  • Packings 70, 80 include respective, relatively thick central metal plates 72, 82. Plates 72, 82 are disposed between respective, relatively thin and'more yieldable, outer layers 74, 84 and inner layers 76, 86 of gasket material. These layers may be deformed by movement of valves 50, 60, but they are completed packing is contained within limits that do not jeopardize the efl'ectiveness of the valve clamping andof the 7 seal. This rninirnizes'the permanent yielding of each entire packing 70, 80, when the entire compressor is assembled and the packings are squeezed. Therefore, even through prolonged use, there is little deterioration in the secureness of the clamping'of valves 50, 60 or in the yieldable packing material layers 74, 76, 84, 86.
  • a corresponding packing in accordance with the present invention would have a 1 mm. thick central, nonyieldable layer and outer yieldable layers each 0.5 mm. thick, with only the outer layers having a 20 percent permanent set After a period of compressor operation, the thickness of the entirepacking will reduce only to 1.8 mm. This thickness reduction requires no retightening to maintain the compressor seal.
  • each said valve is held securely in position between said bored plate and the said central sheet of its respective said packing.
  • each packing is chosen so as to define a desired lift of the respective said blade valve.
US3679333D 1970-01-12 1971-03-16 Packing for air compressor valve Expired - Lifetime US3679333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1925170 1970-01-12

Publications (1)

Publication Number Publication Date
US3679333A true US3679333A (en) 1972-07-25

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US3679333D Expired - Lifetime US3679333A (en) 1970-01-12 1971-03-16 Packing for air compressor valve

Country Status (4)

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US (1) US3679333A (xx)
BE (1) BE761434A (xx)
DE (1) DE2101051A1 (xx)
FR (1) FR2075258A5 (xx)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065237A (en) * 1976-05-17 1977-12-27 The Scott & Fetzer Company Valve apparatus for expansible chamber
US4190402A (en) * 1975-05-06 1980-02-26 International Telephone And Telegraph Corporation Integrated high capacity compressor
US4573880A (en) * 1982-09-02 1986-03-04 Sanyo Electric Co., Ltd. Hermetically sealed motor compressor
US4582469A (en) * 1981-10-20 1986-04-15 Honda Giken Kogyo Kabushiki Kaisha Kabushiki Kaisha Honda Rokku Intake valve apparatus in air pump
US4822254A (en) * 1985-03-29 1989-04-18 Ti Pneumotive, Inc. Oscillating cylinder pumping arrangement
US5265646A (en) * 1993-03-17 1993-11-30 Ingersoll-Rand Company Valve spacer plate
US5387395A (en) * 1992-07-06 1995-02-07 Beckman Instruments, Inc. Fluid distribution manifold
US5456287A (en) * 1994-10-03 1995-10-10 Thomas Industries Inc. Compressor/vacuum pump reed valve
US6190144B1 (en) * 1998-06-19 2001-02-20 Abac Aria Compressa S.P.A. Compressor having easily installed check valves
WO2002012725A3 (en) * 2000-08-08 2002-04-25 Thomas Industries Inc Pump with reversible port function
US20090289210A1 (en) * 2008-05-23 2009-11-26 Aisin Seiki Kabushiki Kaisha Valve structure
CN103438004A (zh) * 2013-09-02 2013-12-11 广东美芝制冷设备有限公司 旋转式压缩机及其轴承以及用于该轴承的排气阀片

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5860800A (en) * 1994-10-13 1999-01-19 Wabco Vermogensverwaltungs Gmbh Compressor cylinder head having a partition
JPH1144267A (ja) * 1997-07-29 1999-02-16 Mitsubishi Electric Corp 燃料供給ポンプ
DE102017109773A1 (de) * 2017-05-08 2018-11-08 Voith Patent Gmbh Hubkolbenmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908287A (en) * 1957-09-04 1959-10-13 Bendix Westinghouse Automotive Compressor valve structure
US3104617A (en) * 1960-08-08 1963-09-24 Mcculloch Corp Diaphragm pump
US3547561A (en) * 1968-12-03 1970-12-15 Atlas Copco Ab Compressor valve devices

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908287A (en) * 1957-09-04 1959-10-13 Bendix Westinghouse Automotive Compressor valve structure
US3104617A (en) * 1960-08-08 1963-09-24 Mcculloch Corp Diaphragm pump
US3547561A (en) * 1968-12-03 1970-12-15 Atlas Copco Ab Compressor valve devices

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190402A (en) * 1975-05-06 1980-02-26 International Telephone And Telegraph Corporation Integrated high capacity compressor
US4065237A (en) * 1976-05-17 1977-12-27 The Scott & Fetzer Company Valve apparatus for expansible chamber
US4582469A (en) * 1981-10-20 1986-04-15 Honda Giken Kogyo Kabushiki Kaisha Kabushiki Kaisha Honda Rokku Intake valve apparatus in air pump
US4573880A (en) * 1982-09-02 1986-03-04 Sanyo Electric Co., Ltd. Hermetically sealed motor compressor
US4822254A (en) * 1985-03-29 1989-04-18 Ti Pneumotive, Inc. Oscillating cylinder pumping arrangement
US5387395A (en) * 1992-07-06 1995-02-07 Beckman Instruments, Inc. Fluid distribution manifold
US5265646A (en) * 1993-03-17 1993-11-30 Ingersoll-Rand Company Valve spacer plate
US5456287A (en) * 1994-10-03 1995-10-10 Thomas Industries Inc. Compressor/vacuum pump reed valve
US6190144B1 (en) * 1998-06-19 2001-02-20 Abac Aria Compressa S.P.A. Compressor having easily installed check valves
WO2002012725A3 (en) * 2000-08-08 2002-04-25 Thomas Industries Inc Pump with reversible port function
US20090289210A1 (en) * 2008-05-23 2009-11-26 Aisin Seiki Kabushiki Kaisha Valve structure
US8128385B2 (en) * 2008-05-23 2012-03-06 Aisin Seiki Kabushiki Kaisha Valve structure
CN103438004A (zh) * 2013-09-02 2013-12-11 广东美芝制冷设备有限公司 旋转式压缩机及其轴承以及用于该轴承的排气阀片

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Publication number Publication date
DE2101051A1 (de) 1971-09-16
BE761434A (fr) 1971-06-16
FR2075258A5 (xx) 1971-10-08

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