EP0312597A1 - Piston de machine a deplacement volumetrique - Google Patents

Piston de machine a deplacement volumetrique Download PDF

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Publication number
EP0312597A1
EP0312597A1 EP87904363A EP87904363A EP0312597A1 EP 0312597 A1 EP0312597 A1 EP 0312597A1 EP 87904363 A EP87904363 A EP 87904363A EP 87904363 A EP87904363 A EP 87904363A EP 0312597 A1 EP0312597 A1 EP 0312597A1
Authority
EP
European Patent Office
Prior art keywords
head
sealing ring
piston
face
displacement machine
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Withdrawn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
EP87904363A
Other languages
German (de)
English (en)
Other versions
EP0312597A4 (fr
Inventor
Nikolai Pavlovich Fedorov
Alexandr Pavlovich Demidov
Alexandr Dmitrievich Smirnov
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.)
Proizvodstvennoe Obiedinenie 'zavod Imeni Mikalinina'
Original Assignee
Proizvodstvennoe Obiedinenie 'zavod Imeni Mikalinina'
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 Proizvodstvennoe Obiedinenie 'zavod Imeni Mikalinina' filed Critical Proizvodstvennoe Obiedinenie 'zavod Imeni Mikalinina'
Publication of EP0312597A1 publication Critical patent/EP0312597A1/fr
Publication of EP0312597A4 publication Critical patent/EP0312597A4/fr
Withdrawn legal-status Critical Current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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/121—Valves; Arrangement of valves arranged in or on pistons the valve being an annular ring surrounding the piston, e.g. an O-ring
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston

Definitions

  • the present invention relates to positive displacement machines, namely reciprocating compressors and piston pumps, and in particular relates to the piston of a positive displacement machine.
  • a piston, a displacement machine, in particular a pump piston, is known (US, A, 3532446) which contains a head connected to a piston rod, an elastic sealing ring with a covex outer surface for contacting the cylinder of the displacement machine, the sealing ring being along the axis of the head is arranged between the movement limiters for the sealing ring, one of which is designed as a collar.
  • the piston head is in the form of a disk, on one end face of which the piston rod is fastened with its ends in the middle and on the circumference at equal intervals to one another on the circular line three rods parallel to the piston rod. The free ends of the rods are bent towards the cylinder.
  • the elastic sealing ring is arranged between the disc and the bent ends of the rods.
  • the inner diameter of the sealing ring is larger than the diameter of the circle on which the rods are located.
  • the bent ends of the rods and the washer serve as movement limiters for the sealing ring.
  • the bent ends of the rods fulfill the function of the collar, against which the sealing ring rests when the piston moves in the direction for sucking in the working medium (liquid) into the crank-side cylinder chamber of the pump.
  • the sealing ring is pressed against the disk by the frictional forces acting between the ring and the pump cylinder.
  • the sealing ring is exposed to heavy wear, which shortens the operating time of the piston.
  • the invention has for its object to provide a piston of a displacement machine, in which the head is designed such that the service life of the sealing ring when it is worn and thus the service life of the piston can be increased.
  • a yolben of a displacement machine comprising a head connected to a piston rod and an elastic sealing ring with a convex outer surface for contacting a cylinder of the displacement machine, the sealing ring along the axis of the head between limiting movements for the latter Sealing ring is movably arranged, one of which is designed as a collar, according to the invention the circumferential surface of the head is conical, the collar is formed on the end face with the smaller diameter, the piston rod is connected to a face end with the larger diameter and as a second movement limiter for the Sealing ring serves part of the lateral surface of the head, which is located on the side of the larger diameter end face.
  • the angle of inclination of the conical outer surface of the head to its axis can expediently be greater than the angle of friction of the sealing ring.
  • the sealing ring can expediently have a wedge shape in section, which tapers towards its end face, which faces the end face of the head which has the larger diameter.
  • Such a design of the piston of a displacement machine increases its operating time by at least twice, because the wear on the outer surface of the sealing ring exposed to friction is compensated for by the fact that the sealing ring is removed from the lateral surface of the head when clamped in the gap between the head and the cylinder of the displacement machine is spread.
  • the piston of a displacement machine which is described using the example of the piston of a portable automotive compressor, contains a head I (FIG. I), the lateral surface 2 of which has a conical shape with a straight line generator or with a generator in the form of a circular arc. According to the embodiment variant of the invention shown in the drawing, it has the shape of a truncated cone.
  • the end face 3 of the head I which has the larger diameter, is connected to a piston rod 4, which is made in one piece with the head I.
  • a collar 6 is designed with two diametrically extending grooves 7.
  • An elastic sealing ring 8 for example made of fluoroplastic, is placed on the head I.
  • the sealing ring 8 has a convex outer surface 9 for contacting a cylinder 10 of the compressor.
  • the inner surface II of the sealing ring 8 is also convex.
  • the sealing ring 8 has a wedge shape in section, which tapers towards its end face 12, and is arranged so that this end face 12 faces the larger diameter end face 3 of the head I.
  • the inclination swinkel ⁇ of the conical surface 2 of the head I to its axis "0" is greater than the angle of friction of the material of the sealing ring 8, so that the latter does not get stuck in the gap between the cylinder 10 of the compressor and the head I of the piston.
  • the angle of inclination ⁇ must have such an amount that the sealing ring 8 is pressed tightly against the cylinder 10 from the lateral surface 2 of the head I, and usually does not exceed 6 °. In the given variant of the invention it is equal to ⁇ 15 °. It is not advisable to select an angle of inclination of more than 30 °.
  • the sealing ring 8 With its inner surface II touches the lateral surface 2 of the head I on the side of the end face 3. That is, the lateral surface 2 of the head I serves as a 3-movement limiter for the sealing ring 8.
  • the second movement limiter for the sealing ring 8 is the collar 6, against which the sealing ring 8 rests when the piston makes a stroke in the direction of the suction Air in the cylinder chamber "P" on the cover side.
  • the piston of a displacement machine operates as follows.
  • the head I moves relative to the sealing ring 8 until the latter with its inner surface II the part of the lateral surface 2 of the Head I, which is located on the side of the front side 3, touches. Then the sealing ring 8 begins to move together with the head I. It completely covers the gap between the head I and the cylinder 10, and in the cylinder chamber "P" on the cover side the air is compressed to the required pressure with subsequent delivery of the compressed air to the consumer.
  • the head I moves relative to the sealing ring 8 until its collar 6 comes into contact with the sealing ring 8. Then the sealing ring 8 begins to move together with the head I, and the process of sucking in the air into the cylinder chamber "P" on the cover side is repeated.
  • the stepped shape of the dividing line 13 excludes the possibility of an axial displacement of the sealing ring 8 along the dividing line 13.
  • the wedge shape of the cut of the sealing ring 8 increases its sealing ability, while the conical shape of the head I enables the required characteristics of the compressor to be maintained during its longer operation light.
  • the piston of a displacement machine according to the invention is suitable for any reciprocating piston compressor and piston pump, for example for portable automotive compressors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Compressor (AREA)

Abstract

Un piston d'une machine à déplacement volumétrique comporte une tête conique (1) pourvue d'un épaulement de butée (6) sur sa face terminale (5) d'un plus faible diamètre. L'autre face terminale (3) de la tête est reliée à une bielle (4). Une bague d'étanchéité élastique (8) est montée mobile sur la tête (1) le long de l'axe de cette dernière et entre les butées ménagées sur ladite tête, l'une d'elles étant l'épaulement (6) et l'autre étant une partie de la surface latérale (2) de la tête (1) située au niveau de la face terminale (3) d'un diamètre supérieur.
EP19870904363 1987-04-21 1987-04-21 Piston de machine a deplacement volumetrique. Withdrawn EP0312597A4 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/SU1987/000042 WO1988008489A1 (fr) 1987-04-21 1987-04-21 Piston de machine a deplacement volumetrique

Publications (2)

Publication Number Publication Date
EP0312597A1 true EP0312597A1 (fr) 1989-04-26
EP0312597A4 EP0312597A4 (fr) 1989-11-14

Family

ID=21617096

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870904363 Withdrawn EP0312597A4 (fr) 1987-04-21 1987-04-21 Piston de machine a deplacement volumetrique.

Country Status (4)

Country Link
EP (1) EP0312597A4 (fr)
FI (1) FI885854A0 (fr)
RO (1) RO102342B1 (fr)
WO (1) WO1988008489A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210578A1 (de) * 1992-03-31 1992-07-30 Karl Liedgens Kolben fuer luftpumpen und daempfer
DE4236682A1 (de) * 1992-10-30 1994-05-05 Teves Gmbh Alfred Hydraulische Hochdruckpumpe mit Überströmmanschette
DE29814962U1 (de) * 1998-08-20 1999-11-04 Alusuisse Bayrisches Druckgus Kolben für einen Kolbenverdichter
DE20106700U1 (de) * 2001-04-18 2002-05-23 Alusuisse Bayrisches Druckgus Kolben für einen Kolbenverdichter
EP1437508A1 (fr) * 2003-01-07 2004-07-14 Wen-San Jhou Soupape annulaire intégrée dans le piston d'un compresseur
CN106321419A (zh) * 2016-10-10 2017-01-11 国家海洋局天津海水淡化与综合利用研究所 一种新型自密封式活塞
CN113153731A (zh) * 2021-04-16 2021-07-23 深圳市顺美医疗股份有限公司 一种可调节硅胶塞枪式压力泵及其组装方法
WO2022158111A1 (fr) * 2021-01-20 2022-07-28 株式会社日立産機システム Compresseur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1107868A (fr) * 1953-01-21 1956-01-05 Dispositif comportant un cylindre et un organe mobile axialement dans ce cylindre, tel que pompe ou compresseur
DE975469C (de) * 1952-06-04 1961-12-07 Mueller & Co Schwelmer Eisen Pumpenkolben mit eingebautem Fluessigkeitsventil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3085515A (en) * 1961-11-24 1963-04-16 Internat Packings Corp Priming pump
US3335673A (en) * 1966-01-17 1967-08-15 Forrest Henry De Manually operable pump
ZA724429B (en) * 1971-07-03 1973-03-28 Girling Ltd Improvements relating to disc brakes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE975469C (de) * 1952-06-04 1961-12-07 Mueller & Co Schwelmer Eisen Pumpenkolben mit eingebautem Fluessigkeitsventil
FR1107868A (fr) * 1953-01-21 1956-01-05 Dispositif comportant un cylindre et un organe mobile axialement dans ce cylindre, tel que pompe ou compresseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8808489A1 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4210578A1 (de) * 1992-03-31 1992-07-30 Karl Liedgens Kolben fuer luftpumpen und daempfer
DE4236682A1 (de) * 1992-10-30 1994-05-05 Teves Gmbh Alfred Hydraulische Hochdruckpumpe mit Überströmmanschette
DE29814962U1 (de) * 1998-08-20 1999-11-04 Alusuisse Bayrisches Druckgus Kolben für einen Kolbenverdichter
EP0980977A2 (fr) * 1998-08-20 2000-02-23 Alusuisse Bayrisches Druckguss-Werk GmbH & Co. KG Piston pour un compresseur à piston
EP0980977A3 (fr) * 1998-08-20 2000-10-11 Alusuisse Bayrisches Druckguss-Werk GmbH & Co. KG Piston pour un compresseur à piston
DE20106700U1 (de) * 2001-04-18 2002-05-23 Alusuisse Bayrisches Druckgus Kolben für einen Kolbenverdichter
EP1437508A1 (fr) * 2003-01-07 2004-07-14 Wen-San Jhou Soupape annulaire intégrée dans le piston d'un compresseur
CN106321419A (zh) * 2016-10-10 2017-01-11 国家海洋局天津海水淡化与综合利用研究所 一种新型自密封式活塞
WO2022158111A1 (fr) * 2021-01-20 2022-07-28 株式会社日立産機システム Compresseur
CN113153731A (zh) * 2021-04-16 2021-07-23 深圳市顺美医疗股份有限公司 一种可调节硅胶塞枪式压力泵及其组装方法
CN113153731B (zh) * 2021-04-16 2022-03-15 深圳市顺美医疗股份有限公司 一种可调节硅胶塞枪式压力泵及其组装方法

Also Published As

Publication number Publication date
FI885854A (fi) 1988-12-19
FI885854A0 (fi) 1988-12-19
EP0312597A4 (fr) 1989-11-14
WO1988008489A1 (fr) 1988-11-03
RO102342B1 (en) 1992-06-26

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19910731