WO2009012862A1 - Pneumatikkomponente - Google Patents
Pneumatikkomponente Download PDFInfo
- Publication number
- WO2009012862A1 WO2009012862A1 PCT/EP2008/005217 EP2008005217W WO2009012862A1 WO 2009012862 A1 WO2009012862 A1 WO 2009012862A1 EP 2008005217 W EP2008005217 W EP 2008005217W WO 2009012862 A1 WO2009012862 A1 WO 2009012862A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- piston
- pneumatic component
- component according
- ring
- pneumatic
- Prior art date
Links
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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/143—Sealing provided on the piston
-
- 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
-
- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49249—Piston making
- Y10T29/49265—Ring groove forming or finishing
Definitions
- the invention relates to a pneumatic component having a cylinder, a piston running in the cylinder and a grooved ring which seals the piston against the cylinder and has a static side and a dynamic side.
- Such pneumatic components are used, for example, in the form of compressors, in particular as piston air compressors, in trucks or passenger cars.
- the pistons of the compressor have a circumferential groove, in which engages a grooved ring.
- the grooved ring seals the piston against the cylinder.
- the pistons for such compressors are partly produced by injection molding. This leaves a running in the longitudinal direction of the piston
- This molding ridge must be removed by a cutting process in order to be able to raise separately produced rubber rings made of rubber on the piston can. Without removal of the molding ridge the U-ring is not seated sufficiently tight on the piston.
- a disadvantage of such pneumatic components is therefore their complex production.
- the rubber ring is first vulcanized sitting on the piston in an alternative manufacturing process.
- a disadvantage of this is that this method for piston diameters of more than 70 mm such a small pro- Zessburn possesses that it can not be used in mass production.
- the invention has for its object to overcome disadvantages in the prior art.
- the invention solves the problem by a generic pneumatic component in which the U-ring on the static side has at least two concentric micro-lips.
- the piston can be injection-molded, for example, from plastic, without the Formannonsgrat must be removed.
- the micro-ribs ensure despite a burr for an airtight connection between the piston and the U-ring.
- the U-rings can be made separately even with a diameter of more than 70 mm and subsequently connected to an injection-molded piston.
- the dynamic side is understood to mean that side of the groove that rubs against another component during operation of the pneumatic component.
- the static side is the side that rests upon operation of the pneumatic component relative to the component to which the U-ring is attached.
- the U-ring is fixed to the piston so that its static side faces the piston.
- the U-ring is attached to the piston so that the shaping ridge cuts the micro-ribs. If, for example, the shaping ridge runs in the longitudinal direction of the piston, then it is advantageous if the micro-ribs intersect the shaping ridge substantially perpendicularly.
- micro-ribs protrude by less than 0.5 mm over a base.
- the piston has a diameter of more than 70 mm.
- the pneumatic component can be built with a particularly large cubic capacity without having to remove the burr. With such diameters, vulcanization of the groove is no longer possible.
- U-ring is made of rubber, since such U-rings have a particularly long service life.
- a particularly high sealing effect is achieved if the grooved ring has a multiplicity of concentric micro-lips, for example 3, 4, 5 or more micro-ribs.
- a pneumatic component according to the invention is used particularly advantageously as an air compressor, in particular for a commercial vehicle pneumatic system.
- a pneumatic component according to the invention can also be used as a pneumatic actuator, in particular as a pneumatic gearbox.
- Figure 1 shows a schematic cross section through a pneumatic component according to the invention.
- Figure 2 shows a detail of a Nutrings a inventive
- FIG. 3 shows a three-dimensional view of a groove for a pneumatic component according to the invention.
- FIG. 1 shows a pneumatic component in the form of a compressor 10 which comprises a cylinder 12, a piston 14 running in the cylinder 12 and a grooved ring 16.
- the grooved ring 16 is fixedly secured in a circumferential groove 18 around the piston 14.
- the piston 14 is reciprocable at a connecting rod 19.
- the grooved ring 16 seals a gap 20 between the cylinder 12 and the piston 14, so that air 22, which is located in the cylinder 12, is compressed to an air pressure p.
- the compressed air is discharged through a non-illustrated check valve from the cylinder and when moving the piston 14 out of the cylinder 12, air can past the grooved ring 16 by flow the gap 20 to be compressed at a subsequent stroke.
- the piston 14 is made of plastic in an injection molding process, which has led to a Entformungsgrat 24, which is shown schematically by dashed lines and extending along a longitudinal axis of the piston 14 and extends through the groove 18.
- a Entformungsgrat 24 which is shown schematically by dashed lines and extending along a longitudinal axis of the piston 14 and extends through the groove 18.
- the groove ring 16 rests flush against the piston 14 in the area of the molding pitch 24.
- it has on its static side S stat micro lips, as shown in detail in FIG.
- S d y n micro-ribs may be provided, but it is not in the present case.
- Figure 2 shows the grooved ring 16 in a detailed view.
- the grooved ring 16 has a radially outer sealing lip 30 of substantially constant thickness, which has a rounding at its radially outermost edge 32.
- the grooved ring 16 which is essentially V-shaped, merges into a cylinder jacket-shaped abutment section 34, with which it bears against the piston 14 in the groove 18.
- the abutment portion 34 has an axial extent, which corresponds to substantially half an axial extent of the Nutrings 16.
- the inner diameter of the Nutrings 16 is selected in the contact portion 34 so that it rests without play and with little force on the piston.
- Adjoining the contact section 34 is a transition section 35, which projects radially inwards and merges into an engagement section 36.
- the transition section 35 has, in the transition into the engagement section 36, a diameter which is selected such that it has a sufficiently large diameter Pressure on the piston 12 (see Figure 1) is applied to seal the pressure chamber 26 at the air pressure p against the suction chamber 28, if the demolding burr 24 is removed.
- the diameter is 100 microns to 1 mm smaller than the inner diameter of the abutment portion 34th
- micro-lips 38a, 38b, 38c, 38d are formed in the engagement portion 36, which are separated from each other by respective lip bases 40a, 40b, 40c.
- the micro-ribs 38 protrude by 0.1 mm to 0.7 mm over a cylinder jacket-shaped base 42 which extends through the lips 40a, 40b, 40c.
- the micro-ribs 38 all have substantially the same cross-sectional contour and are arranged concentrically with one another.
- the micro-ribs have a micro-lip width b which is smaller than one-tenth of the width B of the nut-ring 16.
- the micro-rib width b is less than 1 mm and in particular more than 0.1 mm.
- the micro-rib width is also desirably chosen to be smaller than one quarter of a width N of the engagement portion 36 (see Fig. 1).
- FIG. 3 shows the grooved ring 16 in a three-dimensional view.
- the pistons 14 are injection-molded and a cylinder housing 44 is produced, which is shown schematically in FIG. 1 and formed in the cylinder 12. It is also the U-ring 16 made of rubber and in particular vulcanized. Subsequently, the grooved ring 16 is pulled over the non-machined after injection molding piston 14 and placed in the groove 18. Subsequently, the said components are installed with other components, such as a pulley for driving the connecting rod 19 to a compressor.
- the pneumatic component may alternatively also be a pneumatic cylinder. In this case, the connecting rod 19 acts as a push rod. By pressurizing the pneumatic cylinder with compressed air, the push rod is pushed out of the cylinder housing 44 and actuates a component to be switched or moved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Compressor (AREA)
- Actuator (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200880017216.1A CN101680546B (zh) | 2007-07-26 | 2008-06-26 | 气动部件 |
US12/452,245 US8505439B2 (en) | 2007-07-26 | 2008-06-26 | Pneumatic component |
EP08773693.0A EP2174041B1 (de) | 2007-07-26 | 2008-06-26 | Pneumatikkomponente |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007034978.7 | 2007-07-26 | ||
DE102007034978A DE102007034978A1 (de) | 2007-07-26 | 2007-07-26 | Pneumatikkomponente |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009012862A1 true WO2009012862A1 (de) | 2009-01-29 |
Family
ID=39768489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/005217 WO2009012862A1 (de) | 2007-07-26 | 2008-06-26 | Pneumatikkomponente |
Country Status (5)
Country | Link |
---|---|
US (1) | US8505439B2 (de) |
EP (1) | EP2174041B1 (de) |
CN (1) | CN101680546B (de) |
DE (1) | DE102007034978A1 (de) |
WO (1) | WO2009012862A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011124405A1 (de) * | 2010-04-07 | 2011-10-13 | Robert Bosch Gmbh | Ringförmiges dichtelement |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103542091B (zh) * | 2012-07-10 | 2016-04-13 | 珠海格力电器股份有限公司 | 密封环及具有该密封环的螺杆压缩机 |
US10895252B2 (en) * | 2018-12-18 | 2021-01-19 | Lih Yann Industrial Co., Ltd. | Fluid pumping device |
DE102019114445A1 (de) | 2019-05-29 | 2020-12-03 | Kautex Textron Gmbh & Co. Kg | Fluidtemperierbare Traktionsbatterie und Batteriegehäuseanordnung mit Durchführung für Wärmeübertragungseinrichtung |
CN110778492B (zh) * | 2019-11-05 | 2021-04-16 | 梁也 | 垂体逆毛单向密封装置 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1035425B (de) * | 1955-08-25 | 1958-07-31 | Stabeg Appbau Gmbh | Dichtungskoerper aus gummielastischem Material fuer druckmittelbeaufschlagte Kolben |
GB971016A (en) * | 1962-05-10 | 1964-09-23 | Prec Associates Inc | Sealing ring |
FR2404768A1 (fr) * | 1977-10-01 | 1979-04-27 | Wabco Westinghouse Gmbh | Cylindre d'accumulateur a ressort, notamment pour frein de vehicule routier |
DE19704250A1 (de) * | 1997-02-05 | 1998-08-06 | Itt Mfg Enterprises Inc | Dichtung mit konischem Boden der Aufnahmenut |
US20040056427A1 (en) * | 2002-07-31 | 2004-03-25 | Carl Freudenberg Kg | Lip seal |
DE10349917A1 (de) * | 2003-10-25 | 2005-05-25 | Parker Hannifin Gmbh | Dicht-, Abstreif- und Führungselement für die Kolbenstange von Pneumatikzylindern |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2446224A (en) * | 1945-05-03 | 1948-08-03 | Ramsey Accessories Mfg Corp | Hydraulic control oil ring |
US3052478A (en) * | 1959-09-16 | 1962-09-04 | Prec Associates Inc | Sealing ring |
US3199831A (en) * | 1962-11-28 | 1965-08-10 | Western Brass Works | Valve |
GB1385882A (en) * | 1971-09-17 | 1975-03-05 | Bal Ltd | Seal assemblies |
DE2910350C2 (de) * | 1979-03-16 | 1980-10-02 | Bayerische Motoren Werke Ag, 8000 Muenchen | Kolbenstangenführung und -abdichtung, insbesondere für Stoßdämpfer von Kraftfahrzeugen |
FR2644217A1 (fr) * | 1989-03-07 | 1990-09-14 | Procal | Joint d'etancheite statique |
DE4124531C1 (de) * | 1991-07-24 | 1992-11-26 | Fa. Carl Freudenberg, 6940 Weinheim, De | |
US6848354B2 (en) * | 2002-02-07 | 2005-02-01 | Gary L. Grochowski | Unitary rod/piston assembly |
US6883804B2 (en) * | 2002-07-11 | 2005-04-26 | Parker-Hannifin Corporation | Seal ring having secondary sealing lips |
DE10341470A1 (de) * | 2003-09-05 | 2005-04-07 | Fte Automotive Gmbh & Co. Kg | Hydraulikzylinder |
DE102005036124A1 (de) * | 2005-07-26 | 2007-02-01 | Gustav Magenwirth Gmbh & Co. Kg | Betätigungszylinder |
DE102006058193A1 (de) * | 2005-12-17 | 2007-07-12 | Luk Lamellen Und Kupplungsbau Beteiligungs Kg | Kolbenstangenanbindung |
EP1837564A1 (de) * | 2006-03-23 | 2007-09-26 | Carl Freudenberg KG | Dichtring |
-
2007
- 2007-07-26 DE DE102007034978A patent/DE102007034978A1/de not_active Withdrawn
-
2008
- 2008-06-26 US US12/452,245 patent/US8505439B2/en not_active Expired - Fee Related
- 2008-06-26 EP EP08773693.0A patent/EP2174041B1/de not_active Not-in-force
- 2008-06-26 CN CN200880017216.1A patent/CN101680546B/zh not_active Expired - Fee Related
- 2008-06-26 WO PCT/EP2008/005217 patent/WO2009012862A1/de active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1035425B (de) * | 1955-08-25 | 1958-07-31 | Stabeg Appbau Gmbh | Dichtungskoerper aus gummielastischem Material fuer druckmittelbeaufschlagte Kolben |
GB971016A (en) * | 1962-05-10 | 1964-09-23 | Prec Associates Inc | Sealing ring |
FR2404768A1 (fr) * | 1977-10-01 | 1979-04-27 | Wabco Westinghouse Gmbh | Cylindre d'accumulateur a ressort, notamment pour frein de vehicule routier |
DE19704250A1 (de) * | 1997-02-05 | 1998-08-06 | Itt Mfg Enterprises Inc | Dichtung mit konischem Boden der Aufnahmenut |
US20040056427A1 (en) * | 2002-07-31 | 2004-03-25 | Carl Freudenberg Kg | Lip seal |
DE10349917A1 (de) * | 2003-10-25 | 2005-05-25 | Parker Hannifin Gmbh | Dicht-, Abstreif- und Führungselement für die Kolbenstange von Pneumatikzylindern |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011124405A1 (de) * | 2010-04-07 | 2011-10-13 | Robert Bosch Gmbh | Ringförmiges dichtelement |
CN102834613A (zh) * | 2010-04-07 | 2012-12-19 | 罗伯特·博世有限公司 | 环形的密封元件 |
Also Published As
Publication number | Publication date |
---|---|
EP2174041B1 (de) | 2017-01-18 |
EP2174041A1 (de) | 2010-04-14 |
US20100189579A1 (en) | 2010-07-29 |
CN101680546A (zh) | 2010-03-24 |
US8505439B2 (en) | 2013-08-13 |
DE102007034978A1 (de) | 2009-01-29 |
CN101680546B (zh) | 2012-10-10 |
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