EP2483561B1 - Pompe pour appareil de nettoyage haute pression - Google Patents

Pompe pour appareil de nettoyage haute pression Download PDF

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Publication number
EP2483561B1
EP2483561B1 EP20100765398 EP10765398A EP2483561B1 EP 2483561 B1 EP2483561 B1 EP 2483561B1 EP 20100765398 EP20100765398 EP 20100765398 EP 10765398 A EP10765398 A EP 10765398A EP 2483561 B1 EP2483561 B1 EP 2483561B1
Authority
EP
European Patent Office
Prior art keywords
pump
section
valve
valve body
pressure
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.)
Active
Application number
EP20100765398
Other languages
German (de)
English (en)
Other versions
EP2483561A1 (fr
Inventor
Robert Nathan
Jürgen Erdmann
Sven Dirnberger
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.)
Alfred Kaercher SE and Co KG
Original Assignee
Alfred Kaercher SE and 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 Alfred Kaercher SE and Co KG filed Critical Alfred Kaercher SE and Co KG
Publication of EP2483561A1 publication Critical patent/EP2483561A1/fr
Application granted granted Critical
Publication of EP2483561B1 publication Critical patent/EP2483561B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • 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
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump

Definitions

  • the passage on a second section of the stroke movement of the valve body which follows the first partial section has a constant second flow cross-section which is greater than the first flow cross-section.
  • the piston rod has a first cylindrical portion of constant diameter, which connects upstream of the valve body.
  • first cylindrical portion of constant diameter which connects upstream of the valve body.
  • the coupled to the valve body switching plunger is designed in a preferred embodiment of the invention as an axial extension of the piston rod, via which the valve body is connected to the actuator.
  • the piston rod protrudes beyond the valve body on the side of the valve body facing away from the actuator and forms the switching tappet in this projecting region.
  • the pump has a rear housing part and a front housing part, which are joined together tightly in a joining region, and a suction line section extends in the joining region between the two housing parts and the bypass line opens into the Saug effetsabites.
  • the rear housing part faces a drive device of the pump, for example an electric motor, wherein a transmission and / or a swash plate and a piston guide can be arranged between the electric motor and the rear housing part.
  • the front housing part sits on the rear housing part and is the drive device facing away from the pump.
  • the arrangement of the Saug einsabitess in the joining region between the front and the rear housing part has the additional advantage that the geometric shape of the Saug effetsabitess subject to lower boundary conditions, because before the joining of the two housing parts of the joining area for machining and shaping is directly accessible.
  • Saug effetsabites therefore a curvy course can be chosen if necessary, without thereby increasing the production costs are significantly increased.
  • Especially the course of the bypass line can be optimized so that the bypass line has the lowest possible flow resistance.
  • the suction line section running in the joining region is preferably arcuately curved, at least in one section.
  • the arcuate curvature is particularly advantageous in view of the limited space of the pump, because thereby the suction line section receiving spaces for the inlet and outlet valves and for the actuator and, if necessary, the pressure line surrounded. Above all, a circular arc-shaped course of the suction line section arranged in the joining region has proved favorable.
  • a channel is formed, which is covered by the front-side parting surface of the rear housing part and which forms the arranged in the joining region between the two housing parts Saug effetsabites.
  • the throttle point In the presence of a liquid flow in the pressure line, the throttle point has the consequence that the pressure downstream of the throttle point differs from the pressure upstream of the throttle point. Since the low-pressure chamber via the control line downstream of the throttle point is in communication with the pressure line, whereas the high-pressure chamber is connected upstream of the throttle point via a first portion of the bypass line to the pressure line, the control piston is subjected to a liquid pressure in the presence of a liquid flow through the pressure line with a differential pressure. Due to the differential pressure acting on it, the control piston via the piston rod displaces the valve body of the overflow valve against the direction of flow prevailing in the bypass line into a closed position in which the valve body bears against the valve seat of the overflow valve. If the liquid flow is interrupted, the throttle point causes no pressure drop and the pressure in the low pressure chamber corresponds to the pressure in the high pressure chamber. In the absence of a differential pressure between the two chambers, the control piston with one of the
  • each pumping chamber 34 is in fluid communication with a pressure line 50 extending in the longitudinal direction of the pump 10 and molded into the front housing part 16.
  • the output line 46 opens into the front-side parting surface 22 of the rear housing part and the pressure line 50 extends from the rear parting surface 20 of the front housing part 16 and extends to a front side 52 of the front housing part 16 facing away from the rear housing part 14.
  • the end face 52 forms the front end of the pump 10.
  • the area between the output lines 46 of the pumping chambers 34 and the pressure line 50 is sealed radially outwardly from the inner sealing ring 26.
  • the pumping chambers 34 can be supplied with cleaning fluid to be delivered via the inlet section 32 and the outlet section 30 of the suction line and the inlet lines 42 adjoining the outlet section 30 in the joining area.
  • the cleaning liquid is pressurized due to the oscillating movement of the pistons, and via the output lines 46, the pressurized liquid is supplied to the pressure line 50.
  • valve body 90 lifts from the valve seat 88, so that the spill valve 72 releases the flow connection from the pressure line 50 via the portions 70 and 110 of the bypass line to the output section 30 of the suction line.
  • the pressure prevailing in the pressure line 50 pressure can be lowered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)

Claims (13)

  1. Pompe pour un nettoyeur haute pression, servant à refouler un liquide de nettoyage, comprenant au moins une chambre (34) dans laquelle plonge au moins un piston (36a, 36b) pouvant effectuer un mouvement alternatif et qui est raccordée à une conduite d'aspiration (30, 32) par l'intermédiaire d'une soupape d'admission (44) et à une conduite de refoulement (50) par l'intermédiaire d'au moins une soupape d'évacuation (48), et comprenant une conduite de dérivation (70, 110) qui mène de la conduite de refoulement (50) à la conduite d'aspiration (30, 32) et dans laquelle est placée une soupape de décharge (72) dont le corps est raccordé à un actionneur par l'intermédiaire d'une tige de piston (92), lequel actionneur fait coulisser le corps de soupape (90), en fonction du débit de liquide de nettoyage dans la conduite de refoulement (50), dans une position de fermeture ou dans une position d'ouverture et qui fait coulisser un poussoir de commande (96), accouplé au corps de soupape (90) et destiné à actionner un élément de commande, dans une première ou dans une seconde position de commande, caractérisée en ce que le corps de soupape (90), lors de son passage de la position de fermeture à la position d'ouverture, libère un passage, pouvant être traversé par le liquide de nettoyage, en aval du siège de soupape (88), passage dont la section d'écoulement s'élargit lorsque le corps de soupape (90) se trouve à une distance prédéfinie (L) du siège de soupape (88).
  2. Pompe selon la revendication 1, caractérisée en ce que le passage sur un premier tronçon de la course de déplacement du corps de soupape (90) présente une première section d'écoulement constante.
  3. Pompe selon la revendication 2, caractérisée en ce que le passage sur un second tronçon, suivant le premier tronçon, de la course de déplacement du corps de soupape (90), présente une seconde section d'écoulement constante, laquelle est plus grande que la première section d'écoulement.
  4. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps de soupape (90) est réalisé sous la forme d'un élargissement radial de la tige de piston (92), la tige de piston (92) traversant un carter (86) de la soupape de décharge (72), le carter de soupape (86) présentant un siège de soupape (88) et le diamètre de la tige de piston (92) en amont du corps de soupape (90) se rétrécissant en formant une distance prédéfinie (L).
  5. Pompe selon la revendication 4, caractérisée en ce que la tige de piston (92) comprend un premier segment cylindrique (120) d'un diamètre (D) constant, lequel segment se raccorde en amont au corps de soupape (90).
  6. Pompe selon la revendication 5, caractérisée en ce que la tige de piston (92) présente en amont du premier segment cylindrique (120) un second segment cylindrique (124) d'un diamètre (d) constant, le diamètre (d) du second segment cylindrique (124) étant plus petit que le diamètre (D) du premier segment cylindrique (120).
  7. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que le poussoir de commande (96) est réalisé sous la forme d'un prolongement axial de la tige de piston (92).
  8. Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que la pompe (10) comprend une partie de carter arrière (14) et une partie de carter avant (16), qui sont réunies de manière étanche dans une zone de jonction, un segment (30) de la conduite d'aspiration s'étendant entre les deux parties de carter (14, 16) dans la zone de jonction et la conduite de dérivation (70, 110) débouchant dans le segment (30) de la conduite d'aspiration.
  9. Pompe selon la revendication 8, caractérisée en ce que le segment (30) de la conduite d'aspiration est réalisé sous la forme d'un anneau fermé.
  10. Pompe selon la revendication 8 ou 9, caractérisée en ce que l'actionneur est réalisé sous la forme d'un piston de commande (78), lequel divise une chambre de commande (66) de la partie de carter avant (16) en une chambre basse pression (80) et en une chambre haute pression (82), peut coulisser dans la chambre de commande (66) et est relié au corps (90) de la soupape de décharge (72) par l'intermédiaire d'une tige de piston (92), la chambre basse pression (80) étant reliée à la conduite de refoulement (50) en aval d'un point d'étranglement par l'intermédiaire d'une conduite de commande (108) et la chambre haute pression (82) étant reliée à la conduite de refoulement (50) par l'intermédiaire d'un tronçon (110) de la conduite de dérivation disposé en amont de la soupape de décharge (72).
  11. Pompe selon la revendication 10, caractérisée en ce que la conduite de dérivation comprend un tronçon (70) recevant la soupape de décharge (72), ce tronçon débouchant dans le segment (30) de la conduite d'aspiration disposé dans la zone de jonction entre les deux parties de carter (14, 16) et étant orienté en alignement avec la chambre de commande (66).
  12. Pompe selon la revendication 11, caractérisée en ce que la chambre de commande (66) et le tronçon (70) de la conduite de dérivation recevant la soupape de décharge (72) sont orientés parallèlement à la conduite de refoulement (50).
  13. Pompe selon la revendication 11 ou 12, caractérisée en ce que la chambre de commande (66) et le tronçon (70) de la conduite de dérivation recevant la soupape de décharge (72) sont disposés dans un canal de passage (62), lequel traverse la partie de carter avant (16) d'une face avant (52) à une surface de séparation arrière (20).
EP20100765398 2009-10-01 2010-09-24 Pompe pour appareil de nettoyage haute pression Active EP2483561B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009049096A DE102009049096A1 (de) 2009-10-01 2009-10-01 Pumpe für ein Hochdruckreinigungsgerät
PCT/EP2010/064156 WO2011039114A1 (fr) 2009-10-01 2010-09-24 Pompe pour nettoyeur haute pression

Publications (2)

Publication Number Publication Date
EP2483561A1 EP2483561A1 (fr) 2012-08-08
EP2483561B1 true EP2483561B1 (fr) 2015-01-14

Family

ID=43501791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100765398 Active EP2483561B1 (fr) 2009-10-01 2010-09-24 Pompe pour appareil de nettoyage haute pression

Country Status (7)

Country Link
US (1) US8439653B2 (fr)
EP (1) EP2483561B1 (fr)
CN (1) CN102656365B (fr)
BR (1) BR112012006960A2 (fr)
DE (1) DE102009049096A1 (fr)
DK (1) DK2483561T3 (fr)
WO (1) WO2011039114A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2771134B1 (fr) * 2011-10-28 2016-03-23 Alfred Kärcher GmbH & Co. KG Nettoyeur haute pression
WO2016015763A1 (fr) * 2014-07-30 2016-02-04 Alfred Kärcher Gmbh & Co. Kg Pompe à piston et appareil de nettoyage à haute pression équipé d'une telle pompe à piston
EP3645885B1 (fr) 2017-06-29 2021-06-02 Alfred Kärcher SE & Co. KG Appareil de nettoyage à haute pression
WO2019001720A1 (fr) * 2017-06-29 2019-01-03 Alfred Kärcher SE & Co. KG Appareil de nettoyage haute pression
EP4115998A1 (fr) 2021-07-05 2023-01-11 Andreas Stihl AG & Co. KG Appareil de nettoyage haute pression

Family Cites Families (38)

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US2018119A (en) * 1933-11-22 1935-10-22 Service Station Equipment Comp By-pass valve for liquid dispensers
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US3362335A (en) 1966-03-07 1968-01-09 Borg Warner Control system for fluid pressure source
ES445020A1 (es) 1976-02-10 1977-06-01 Bendiberica Sa Perfeccionamientos en valvulas de limitacion de presion.
DE3138211A1 (de) 1981-09-25 1983-04-07 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoff-einspritzpumpe fuer brennkraftmaschinen
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DE19859336C1 (de) * 1998-12-22 2000-06-29 Kaercher Gmbh & Co Alfred Hochdruckreinigungsgerät
JP3679300B2 (ja) * 1999-06-10 2005-08-03 日立建機株式会社 可変容量型液圧回転機の容量制御弁
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ITPD20030053U1 (it) 2003-07-10 2005-01-11 Lavorwash Spa Struttura di pompa idraulica a pistoni assiali
CN2694014Y (zh) 2003-12-25 2005-04-20 上海亿力电器有限公司 用于高压清洗机泵内靠间隙泄压的关枪停机型溢流阀
JP4319667B2 (ja) 2006-05-09 2009-08-26 ユニシア ジェーケーシー ステアリングシステム株式会社 可変容量形ポンプ
US20070267063A1 (en) 2006-05-22 2007-11-22 Greg Davis Unloader valve for pressurized fluid delivery system
DE102007017970A1 (de) 2007-04-11 2008-10-16 Alfred Kärcher Gmbh & Co. Kg Hochdruckreinigungsgerät
CN201100464Y (zh) * 2007-08-22 2008-08-13 陈吉明 一种用于高压清洗机的溢流阀
DE102008059782A1 (de) 2007-12-13 2009-06-18 Luk Lamellen Und Kupplungsbau Beteiligungs Kg Hydraulischer Zylinder

Also Published As

Publication number Publication date
US8439653B2 (en) 2013-05-14
BR112012006960A2 (pt) 2020-08-11
DK2483561T3 (en) 2015-03-23
EP2483561A1 (fr) 2012-08-08
CN102656365A (zh) 2012-09-05
WO2011039114A1 (fr) 2011-04-07
CN102656365B (zh) 2014-11-19
US20120216890A1 (en) 2012-08-30
DE102009049096A1 (de) 2011-04-07

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