WO2002061287A1 - Clapet antiretour - Google Patents

Clapet antiretour Download PDF

Info

Publication number
WO2002061287A1
WO2002061287A1 PCT/DE2001/003773 DE0103773W WO02061287A1 WO 2002061287 A1 WO2002061287 A1 WO 2002061287A1 DE 0103773 W DE0103773 W DE 0103773W WO 02061287 A1 WO02061287 A1 WO 02061287A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve body
valve
check valve
passage opening
particular according
Prior art date
Application number
PCT/DE2001/003773
Other languages
German (de)
English (en)
Inventor
Robert Lange
Werner Dunker
Original Assignee
Luk Automobiltechnik & Co. Kg
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 Luk Automobiltechnik & Co. Kg filed Critical Luk Automobiltechnik & Co. Kg
Priority to DE10195938.9T priority Critical patent/DE10195938B4/de
Priority to DE2001158343 priority patent/DE10158343A1/de
Publication of WO2002061287A1 publication Critical patent/WO2002061287A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F04C29/126—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps of the non-return type
    • 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
    • F16K15/14—Check valves with flexible valve members
    • F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre

Definitions

  • the invention relates to a check valve according to the preamble of claim 1 and a pump according to the preamble of claim 11 with such a check valve.
  • a pump with such a check valve is known from DE 42 20 659 A1.
  • the known pump is used, among other things, to generate a negative pressure in a brake booster of a motor vehicle with an internal combustion engine.
  • a fully ventilated brake booster especially when starting the internal combustion engine, there is an undesirable noise development.
  • a whistling sound came in the system comprising the pump, hose lines and brake booster.
  • the whistle. is perceptible inside the vehicle and is perceived as annoying.
  • the object of the invention is to provide a check valve and a pump which do not have this undesirable noise development.
  • the object is achieved by a check valve which has the features mentioned in claim 1. It has been found that the undesirable development of noise is due to resonance effects on the valve body. Due to the irregular deformation of the valve body when lifting off the passage opening, the resonance effects can be largely suppressed.
  • a preferred exemplary embodiment of the check valve is characterized in that the valve body has an uneven mass distribution in the parts that move when the valve body is lifted from the passage opening.
  • the uneven mass distribution leads to an irregular deformation of the valve body when it is lifted off the passage opening.
  • the vibration behavior of the valve body changes locally due to the uneven mass distribution.
  • the uneven mass distribution can be achieved, for example, by areas with different material densities or by material inclusions and / or air inclusions.
  • valve body is in the position when the valve body is lifted from the passage opening moving parts is asymmetrical. Like the uneven mass distribution, this leads to an irregular opening movement of the valve body. In addition, the vibration behavior of the valve body changes locally. In comparison with the non-uniform mass distribution, the asymmetrical design of the valve body is simpler in terms of production technology and therefore less expensive to implement. However, when designing the valve body asymmetrically, care must be taken to ensure that a sufficient sealing edge is maintained on the valve body.
  • Another particular exemplary embodiment of the check valve is characterized in that a semicircular-shaped thickening is formed on the outer circumference on the side of the valve body facing away from the passage opening in the installed state.
  • the resistance to deformation is greater than in the other areas of the valve body.
  • the valve body does not deform in the area of the thickening when it is lifted off the passage opening — so much.
  • Another particular exemplary embodiment of the check valve is characterized in that a plurality of cam-like elevations are formed on the outer circumference on the side of the valve body facing away from the passage opening. These have a favorable effect on the vibration behavior of the valve body in the open state.
  • a further particular exemplary embodiment of the check valve is characterized in that a web is formed on the side of the valve body facing the passage opening in the installed state. The bridge increases the resistance . against
  • valve body in the when the valve body is lifted from the parts in the installed state of the valve body is biased to different degrees in the closing direction.
  • the different degrees of pretension can be achieved by locally increasing the rigidity in the valve body, for example by introducing a reinforcement matrix, and likewise leads to an irregular deformation of the valve body when it is lifted off the passage opening.
  • a further particular exemplary embodiment of the check valve is characterized in that the valve body has a plate-shaped closing body with a central shaft, which is received in a central fastening opening for fastening the valve body, which is recessed in the bottom of a pot-shaped valve housing part and is surrounded by several through openings.
  • the use of such umbrella-like valve bodies has proven to be advantageous.
  • An annular bead extending in the circumferential direction can be provided on the shaft, which prevents the shaft from sliding out of the fastening opening in the installed state.
  • the shaft can be tensioned in the longitudinal direction to tension the valve body in the closing direction.
  • the cup-shaped valve housing part is closed by a cover with a plurality of passage openings, on the inside of which a plurality of ribs protrude.
  • the surfaces of the ribs facing the valve body form stop surfaces for the valve body and prevent the valve body from coming into contact with the cover when it is lifted from the through openings in the base and closing off the through openings located therein.
  • a pump which has an intake port in which a check valve described above is integrated.
  • the pump can be, for example, a vane pump as disclosed in DE 4220 659 A1.
  • Figure 1 shows a valve body of a check valve according to the invention in a perspective view
  • Figure 2 shows the valve body of Figure 1 in plan view
  • Figure 3 shows the valve body of Figure 1 in side view
  • Figure 4 shows the valve body of Figure 1 in rear view
  • Figure 5 is a perspective view of a check valve with a valve body as shown in Figures 1 to 4;
  • Figure 6 shows the check valve of Figure 5 in front view
  • Figure 7 shows the check valve of Figure 5 in plan view
  • valve body 1 according to an embodiment of the check valve according to the invention is shown separately.
  • the valve body 1 comprises one .
  • Screen 2 A shaft 3 is formed in the center of the curved screen 2 and tapers towards its free end.
  • the stem 3 serves to fasten the valve body 1 in a valve housing.
  • a bulge 4 is formed on the stem 3, with the aid of which the stem 3 can be fixed in an opening in the valve housing.
  • the shield 2 of the valve body 1 is slightly curved on the side facing away from the stem 3.
  • a flattening 7 is formed in the center of the screen 2 5 on the side facing away from the shaft 3.
  • Concentric with the flattening 7, a semicircular thickening 5 is formed on the outer circumference of the screen 2.
  • One half of the screen 2 is therefore equipped with no thickening and the other half of the screen 2 with the thickening 5.
  • the valve body 1 shown in FIGS. 1 to 4 is a one-piece injection molded part made of an elastically deformable material, for example rubber.
  • the valve body 1 can also be composed of several parts.
  • FIGS. 5 to 8 show a check valve according to the invention with a built-in valve body 1.
  • the non-return valve shown in FIGS. 5 to 8 in longitudinal section comprises a valve housing pot 10 with a circumferential wall 11 in the form of a cylindrical cylinder.
  • the circumferential wall 11 merges into a base 12 on one end face of the valve housing pot 10.
  • a plurality of through openings 15, 16 for a working medium, such as air are provided in the bottom 12 of the valve housing pot 10.
  • the check valve shown in Figures 5 to 8 can be accommodated in the intake manifold of a pump, as described in DE 42 20 659 A1.
  • the known pump is used to generate a negative pressure in a brake booster, which is connected via a hose connection to the intake manifold of the pump.
  • the check valve is inserted into the intake manifold of the pump in such a way that the bottom 12 of the valve housing pot 10 with the through openings 15 and 16 faces away from the pump and faces the brake booster. Accordingly, during operation of the pump, air is sucked in from outside through the through openings 15 and 16 in the base 12 into the valve housing pot 10 in order to generate a negative pressure in the brake booster.
  • the center points of the circular passage openings 15 and 16 for the working medium are arranged in a uniformly distributed manner on a concentric circle in the base 12 of the valve housing pot 10.
  • the base 12 has a central opening 18 through which the stem 3 of the valve body 1 projects.
  • the bulge 4 formed on the stem 3 of the valve body 1 lies on the outside at the edge of the opening 18.
  • valve housing pot 12 The other end face of the valve housing pot 12 is closed by a Venti.lgepureckel 20, in which a plurality of openings 24, 25 and 26 are recessed.
  • the interior of the valve housing pot 10 is connected to the pump via the passage openings 24, 25 and 26. If air is sucked in from the interior of the valve housing pot 1 ⁇ through the passage openings 24, 25 and 26, this leads to the shield 2 of the valve body 1 lifting off from the bottom 12 of the valve housing pot 10. When it is lifted off the bottom 12 of the valve housing pot 10, the shield 2 deforms of the valve body 1. In order to limit the deformation of the screen 2 when it is lifted off the floor 12, radially extending ribs 30 and 31 are formed on the valve housing cover 20 on the side facing the valve body.
  • the ribs 30 and 31 extend in the axial direction of the valve housing cover 20 and are arranged perpendicular to one another. The intersection of the ribs 30 and 31 forms an abutment for the screen 2 of the valve body 1. In the installed state, the flattening 7 provided on the screen 2 comes to rest at the intersection of the ribs 30 and 31. As a result, the screen 2 of the valve body 1 is fixed in the axial direction.
  • the check valve described above works as follows: A flow through the valve housing pot 10 from the lid 20 to the bottom 12 is prevented by the valve body 10: When the valve body pot 10 flows through from the bottom 12 to the lid 20, the screen 2 of the valve body 1 lifts from the through openings 15 and 16 in the bottom 12 of the valve housing pot 10. As soon as a vacuum is present in the brake booster, the screen 2 of the valve body 1 is held in contact with the bottom 12 of the valve housing pot 10. The underside of the screen 2 facing the bottom 12 is flat, so that the through openings 15 and 16 are sealed.
  • a web (not shown) is formed on the side of the valve body 1 facing the passage opening 15, 16.
  • the web extends radially outward from the shaft 3.
  • the web increases the shield's resistance to deformation in this area. As a result, the screen deforms less in this area than in the surrounding areas.
  • warps are formed on the valve body.
  • the faults can be caused by zones of different temperatures in the production tool, for example an injection molding tool.
  • the faults on the valve body are formed on the screen and are only visible when the valve body is not installed. In the installed state of the valve body, the screen lies against the bottom of the valve housing pot under a certain pretension.
  • the shield of the valve body is biased to different degrees in the closed direction in the installed state. It is even possible to stop unwanted valve whistling simply by increasing the pretension of the screen.
  • the pretension of the screen is increased, for example, by local material accumulations.
  • the preload of the screen can be increased by inserting metal. An irregular opening movement of the umbrella is initiated by the measures described above. This prevents the occurrence of an undesirable whistle during the operation of the check valve.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)

Abstract

L'invention concerne un clapet antiretour comprenant un corps (1) élastiquement déformable, qui repose sur au moins une ouverture de passage (15, 16) d'un fluide moteur, de manière à ne permettre un écoulement à travers ladite ouverture que dans un seul sens. L'objectif de cette invention est d'éliminer la production de bruits indésirables en cours de marche. A cet effet, le corps (1) du clapet est conçu de sorte qu'il se déforme de manière irrégulière en se levant de l'ouverture de passage.
PCT/DE2001/003773 2001-01-31 2001-09-26 Clapet antiretour WO2002061287A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE10195938.9T DE10195938B4 (de) 2001-01-31 2001-09-26 Rückschlagventil
DE2001158343 DE10158343A1 (de) 2001-01-31 2001-11-28 Rückschlagventil

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10104098 2001-01-31
DE10104098.9 2001-01-31

Publications (1)

Publication Number Publication Date
WO2002061287A1 true WO2002061287A1 (fr) 2002-08-08

Family

ID=7672204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2001/003773 WO2002061287A1 (fr) 2001-01-31 2001-09-26 Clapet antiretour

Country Status (2)

Country Link
DE (2) DE10195938B4 (fr)
WO (1) WO2002061287A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190136992A1 (en) * 2016-04-18 2019-05-09 Husqvarna Ab A sealing valve arrangement

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080142102A1 (en) * 2006-12-18 2008-06-19 Savard Raymond T Check Valve and Pump for High Purity Fluid Handling Systems
DE102008059228A1 (de) * 2008-11-20 2010-05-27 Joma-Polytec Kunststofftechnik Gmbh Vakuumpumpe
FR2991423B1 (fr) * 2012-05-30 2015-05-01 Coutier Moulage Gen Ind Clapet anti-retour du type a membrane
CN109075799B (zh) 2016-04-29 2024-03-15 华为技术有限公司 极化Polar码的编译码方法及装置
CN109404275A (zh) * 2017-08-16 2019-03-01 广州极飞科技有限公司 泵体组件、泵、喷洒系统及无人机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839642A (en) * 1955-12-30 1960-06-29 Renault Improvements in or relating to fluid controlling valves and resilient valve obturates therefor
DE2315870A1 (de) * 1973-03-30 1974-10-10 Alfmeier Kg Walter Vakuum-rueckschlagventil
DE2361077A1 (de) * 1973-12-07 1975-06-19 Borsig Gmbh Selbsttaetiges ventil eines rotationskolbenverdichters
US4360326A (en) * 1979-02-08 1982-11-23 Volkswagenwerk Ag Oil lubricated vacuum pump including an oil separator disposed adjacent of its suction opening
US4610275A (en) * 1985-11-04 1986-09-09 Beecher William H Valve for relieving pressure or checking reverse flow
US4632151A (en) * 1983-09-15 1986-12-30 Grundy (Teddington) Limited Non-return valves
US4711224A (en) * 1986-09-02 1987-12-08 General Motors Corporation Check valve in auxiliary vacuum system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8042902A0 (it) * 1980-01-23 1980-01-23 Necchi Spa Miglioramenti ad un sistema di valvole in motocompressori incapsulati.
DE4220659A1 (de) * 1991-06-25 1993-01-07 Barmag Luk Automobiltech Dosiereinrichtung zum dosieren eines fluessigkeitsstroms
JPH10103243A (ja) * 1996-10-01 1998-04-21 Sanden Corp 圧縮機の弁構造
AUPQ221499A0 (en) * 1999-08-13 1999-09-02 Orbital Engine Company (Australia) Proprietary Limited Compressor valve arrangement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB839642A (en) * 1955-12-30 1960-06-29 Renault Improvements in or relating to fluid controlling valves and resilient valve obturates therefor
DE2315870A1 (de) * 1973-03-30 1974-10-10 Alfmeier Kg Walter Vakuum-rueckschlagventil
DE2361077A1 (de) * 1973-12-07 1975-06-19 Borsig Gmbh Selbsttaetiges ventil eines rotationskolbenverdichters
US4360326A (en) * 1979-02-08 1982-11-23 Volkswagenwerk Ag Oil lubricated vacuum pump including an oil separator disposed adjacent of its suction opening
US4632151A (en) * 1983-09-15 1986-12-30 Grundy (Teddington) Limited Non-return valves
US4610275A (en) * 1985-11-04 1986-09-09 Beecher William H Valve for relieving pressure or checking reverse flow
US4711224A (en) * 1986-09-02 1987-12-08 General Motors Corporation Check valve in auxiliary vacuum system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190136992A1 (en) * 2016-04-18 2019-05-09 Husqvarna Ab A sealing valve arrangement
US11073217B2 (en) * 2016-04-18 2021-07-27 Husqvarna Ab Sealing valve arrangement

Also Published As

Publication number Publication date
DE10158343A1 (de) 2002-08-01
DE10195938B4 (de) 2014-04-03
DE10195938D2 (de) 2003-12-24

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