EP2805050A1 - Pompe à pistons pour appareil de nettoyage à haute pression - Google Patents

Pompe à pistons pour appareil de nettoyage à haute pression

Info

Publication number
EP2805050A1
EP2805050A1 EP12700837.3A EP12700837A EP2805050A1 EP 2805050 A1 EP2805050 A1 EP 2805050A1 EP 12700837 A EP12700837 A EP 12700837A EP 2805050 A1 EP2805050 A1 EP 2805050A1
Authority
EP
European Patent Office
Prior art keywords
pump
valve seat
pressure
suction
piston pump
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.)
Granted
Application number
EP12700837.3A
Other languages
German (de)
English (en)
Other versions
EP2805050B1 (fr
Inventor
Robert Nathan
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 EP2805050A1 publication Critical patent/EP2805050A1/fr
Application granted granted Critical
Publication of EP2805050B1 publication Critical patent/EP2805050B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/18—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
    • F04B1/182—Check 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • 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
    • F04B53/007—Cylinder heads
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes

Definitions

  • the invention relates to a piston pump for a high-pressure cleaning device having a plurality of pump chambers, in each of which a reciprocating piston dips and which are in each case via a suction valve with a suction inlet and a pressure valve with a pressure outlet in flow communication, wherein the suction valve comprises a Saugventilschongaka, the can be applied to a suction valve seat sealing, and wherein the pressure valve comprises a pressure valve tilschwhiworks which is sealingly engageable with a pressure valve seat, wherein the pressure valve seat is arranged radially offset from the suction valve seat relative to a pump longitudinal axis.
  • Such a piston pump is known from WO 2008/086950 AI.
  • a liquid especially water
  • the piston pump has a plurality of pump chambers, in each of which a piston is immersed.
  • the piston is driven to a reciprocating motion.
  • This has the consequence that the volume of the pump chamber periodically changed and thereby sucked liquid from a suction inlet via a suction valve in the pump chamber, placed in the pump chamber under pressure and then discharged through a pressure valve and a pressure outlet.
  • a supply line can be connected to the suction inlet and, for example, a pressure hose can be connected to the pressure outlet, which carries a discharge element at its free end, for example a spray nozzle or a spray lance.
  • the piston pump is subject to considerable mechanical stress during its operation, since it has to withstand liquid pressures of over 100 bar.
  • the housing of the piston pump therefore usually has a considerable material thickness. This is especially true for the area between the Saugventilsitzen and the pressure valve seats, since the pump housing is particularly heavily loaded in these areas.
  • Object of the present invention is to develop a piston pump of the type mentioned in such a way that it has an increased mechanical strength without increasing their material thickness.
  • Each pumping chamber of the piston pump, a Saugventilsitz and a pressure valve seat are arranged.
  • the centers of the suction valve seat and the pressure valve seat are positioned in a common cutting plane of the piston pump, the cutting plane containing the pump longitudinal axis.
  • the pressure valve seat is arranged offset in relation to the pump longitudinal axis in the circumferential direction of the piston pump to the suction valve seat in the inventive piston pump. It has been shown that the piston pump receives an increased mechanical strength by the staggered arrangement of the pressure valve seat, without requiring the material strength of the piston pump must be increased. If the material thickness remains the same, the liquid to be delivered can thus be pressurized to a higher pressure.
  • the pressure valve seat is arranged offset relative to the pump longitudinal axis by an angle of 10 ° to 40 ° to the suction valve seat.
  • an angle in the range between 20 ° and 30 °, for example 25 °, has proved to be advantageous in order to increase the mechanical load capacity of the piston pump without increasing their material thickness.
  • the suction valve seat and the pressure valve seat are made of a plastic material.
  • the piston pump has three suction valve seats arranged uniformly distributed about the piston longitudinal axis and three pressure valve seats distributed uniformly around the piston longitudinal axis.
  • the Saugventilsitze are arranged in such an embodiment at an angular distance of 120 ° to each other and also the pressure valve seats have an angular distance of 120 ° to each other. Both the Saugventilsitze and the pressure valve seats thus form the corners of an imaginary equilateral triangle.
  • the center of the imaginary triangle of Saugventilsitze coincides with the center of the imaginary triangle of the pressure valve seats.
  • the imaginary triangle of the pressure valve seats with respect to the imaginary triangle of Saugventilsitze is arranged rotated around the piston longitudinal axis.
  • the angle of rotation is favorably 10 ° to 40 °, in particular 20 ° to 30 °, preferably 25 °.
  • the piston pump according to the invention comprises a pump block and a pump head, wherein the pump head has the suction inlet and the pressure outlet and the pump block comprises the pump chambers and receives the suction and the pressure valves, and wherein the pump head placed on a triangular edge of the pump block is, wherein the suction valves are arranged in a plan view of the pump block in the corner regions of the edge and the pressure valves are surrounded in a plan view of the pump block within the edge of a cylindrical inner wall.
  • the pump head placed on a triangular edge of the pump block is, wherein the suction valves are arranged in a plan view of the pump block in the corner regions of the edge and the pressure valves are surrounded in a plan view of the pump block within the edge of a cylindrical inner wall.
  • the suction valves each have a suction valve passage, which can be closed by the suction valve closing body, and a suction valve closing spring which moves the suction valve closing body with a spring force in the direction of the suction valve closing body. valve passage applied. It is advantageous if the Saugventilschaynefeder is positioned at an axial distance to the Saugventil matlass. In such a configuration, the liquid flowing into the pump chamber can flow past the suction valve closing spring laterally, without these having to be flowed through by the liquid. This reduces flow losses in the region of the suction valve closing spring, since the flow loss exerted by the suction valve closing spring can be kept low.
  • the Saugventilsch singlefeder is arranged in a Saugventilhunt which is in flow communication via the Saugventil mallass, wherein at a distance from the Saugventil mallass into the Saugventilhunt a support arm protrudes, on which the Saugventilsch proposedfeder is supported.
  • the Saugventilsch In known piston pumps, the Saugventilsch Vietnamesefeder supported directly on the Saugventil tiplass and the liquid must flow through the Saugventilschaynefeder to get to the Saugventil trimlass. This is not necessary in a development of the invention, since the Saugventilsch widerfeder supported with its the Saugventil tiplass end facing a support arm, which projects at a distance from the Saugventil trimlass in the Saugventilbib.
  • the support arm is radially aligned relative to the piston longitudinal axis.
  • the suction valve chamber is only partially penetrated by the holding arm, that is to say the holding arm projects freely from the wall of the suction valve chamber, without reaching the diametrically opposite wall region of the suction valve chamber with its free end.
  • the holding arm projects only approximately to the middle of the suction valve chamber. It is advantageous if the holding arm forms a guide for the Saugventilschongele. This can be prevented in a structurally simple way that the SaugventilschstedAvem tilted during a lifting movement.
  • the holding arm conveniently comprises a passage opening, which is penetrated by the Saugventilschongelasticity.
  • the Saugventilsch homemade organisation may for example be designed mushroom-shaped and comprise a valve plate, which is followed by a valve stem, wherein the valve stem passes through the through hole of the support arm and is guided by the support arm.
  • the suction valve closing spring is clamped on the side of the holding arm facing away from the suction valve passage between the holding arm and the suction valve closing body.
  • the suction valve closing spring is supported, on the one hand, on the side of the holding arm facing away from the suction valve passage and, on the other hand, on the suction valve closing body.
  • the Saugventilsch singleharmonic may have a spring holder for this purpose. Conveniently, the spring holder is pressed with a shaft of the Saugven- tilschongitess.
  • Figure 1 a schematic longitudinal sectional view of an advantageous
  • Figure 2 a plan view of a pump block of the piston pump
  • FIG. 1 A first figure.
  • Figure 3 is a sectional view of the pump block along the line 3-3 in
  • Figure 2 Figure 4 is a sectional view of a suction valve along the line 4-4 in Figure 3;
  • Figure 5 is a sectional view of the pump block along the line 5-5 in
  • a piston pump according to the invention is shown schematically, which is generally occupied by the reference numeral 10. It comprises a pump head 12 with a suction inlet 14 and a pressure outlet 16. To the suction inlet 14, a supply line can be connected, via which the piston pump 10 can be supplied under pressure to be set liquid. To the pressure outlet 16, a discharge line can be connected, by means of which the liquid pressurized by the piston pump 10 can be directed onto an object or a surface in order to clean the object or the surface.
  • the discharge line may carry at its free end a delivery member, such as a spray lance or a spray nozzle.
  • the pump head is mounted on a pump block, which comprises a total of three identically designed pump chambers, in each of which a piston is immersed.
  • a pump block which comprises a total of three identically designed pump chambers, in each of which a piston is immersed.
  • one of the pumping chambers 20 is shown, in which a piston 22 protrudes.
  • Each pumping chamber 20 is associated with a suction valve 24 and a pressure valve 26. Liquid can be sucked in from the suction inlet 14 into the pumping space 20 via the suction valve 24, and the liquid pressurized in the pumping space 20 can escape from the pumping space 20 via the pressure valve 26.
  • the suction valves 24 each include a Saugventilsch soraj 28 which is sealingly engageable with a Saugventilsitz 30.
  • the Saugventilsitz 30 surrounds a Saugventil trimlass 32.
  • About the Saugventil tiplass 34 of the pump chamber 20 is in fluid communication with a Saugventilhunt 34, which on the pump head 12 facing side of the pump block 18 in the Pump block 18 is formed.
  • a holding arm 36 which extends to about the middle of the Saugventilhunt 34 and aligned with the suction valve 32 has a passage opening 38 aligned.
  • the Saugventilsch homemade organisation 28 is designed mushroom-shaped. It comprises a valve disk 40 protruding into the pump chamber 20, to which a valve stem 42 integrally connects, which passes through the suction valve passage 32 and dips into the suction valve chamber 34.
  • the valve stem 42 passes through the
  • Saugventilsch Through opening 38 of the support arm 36 and carries at its free end a spring holder 44 which is pressed onto the valve stem 42. Between the spring holder 44 and the holding arm 36, a Saugventilsch beneficialfeder 46 is clamped.
  • the Saugventilsch beneficialfeder 46 is formed as a helical spring and surrounds the valve stem 42 in the region between the support arm 36 and the spring holder 44. Under the action of Saugventilsch beneficialfeder 46, the valve plate 40 of the Saugventilschlesives 28 is pressed against the Saugventilsitz 30.
  • the pressure valve 26 has a pressure valve closing body 48, which is pressed by a pressure valve closing spring 50 against a pressure valve seat 52.
  • the pressure valve 26 is arranged in a pressure valve chamber 54.
  • Each pumping chamber 20 of the piston pump 20 is associated with a suction valve chamber 34 and a pressure valve chamber 54, wherein all the pressure valve chambers 54 of the piston pump 10 merge into a common central chamber 56, which is formed by the pump block 18 and the pump head 12.
  • a central insert member 58 is inserted, which is surrounded by sealing rings and having a central passage 60 which is closed by a central closing body 62.
  • the closing body 62 in combination with the central insert part, forms a central non-return valve, which is adjoined coaxially with a pump longitudinal axis 64 by a pressure line 66, via which the central chamber 56 is in flow communication with the pressure outlet 16.
  • the pump head 12 is mounted in the axial direction on the pump block 18 with the interposition of an elastically deformable element.
  • the elastically deformable element is designed as a sealing ring 68.
  • the sealing ring 68 surrounds a collar-shaped edge 70 of the pump block 18. This becomes clear in particular from FIG.
  • the edge 70 has the shape of an equilateral triangle with rounded corner areas.
  • the suction valves 24 are each arranged in a corner region of the edge 70. This becomes clear in particular from FIG.
  • the edge 70 surrounds a cylindrical inner wall 72 which defines the central chamber 56 in the region of the pump block 18.
  • the pressure valves 26 are arranged in a plan view of the pump block 18 within the inner wall 72. This is also clear from FIG.
  • each pump chamber 20 is assigned a suction valve 24 with a suction valve seat 30 and a pressure valve 26 with a pressure valve seat 52.
  • the respective pressure valve seat 52 is arranged offset relative to the pump longitudinal axis 64 in the radial direction as well as in the circumferential direction of the piston pump 10 to the suction valve seat 30.
  • the radial distance of the pressure valve seat 52 to the pump longitudinal axis 64 is less than the radial distance which the Saugventilsitz 30 occupies the pump longitudinal axis 64, and in the circumferential direction of the piston pump 10, the pressure valve seat is offset in the illustrated embodiment by an angle a of approximately 25 ° to Saugventilsitz 30 ,
  • the piston pump 10 has a total of three Saugventilsitze 30 and three pressure valve seats 52, wherein the Saugventilsitze 30 as well as the pressure valve seats 52 define an imaginary equilateral triangle.
  • the centers of the imaginary triangles are arranged on the pump longitudinal axis 64, the imaginary triangle of the pressure valve seats 52 but rotated by the angle a of 25 ° relative to the imaginary triangle of the Saugventilsitze 30 about the pump longitudinal axis 64.
  • On the pump block 18 is connected in the axial direction with respect to the pump longitudinal axis 64 made of a plastic material support plate 74 with three cylindrical, aligned in each case aligned to a piston longitudinal axis 76 support sleeves 78.
  • the support sleeves 78 are each welded to an annular wall 80 of the pump block 18, which dips into the respective support sleeve 78 and surrounds a sealing ring 82 which rests sealingly with a sealing lip on the piston 22.
  • the support plate 74 is supported in the axial direction on a guide plate 84.
  • the guide plate 84 has three cylindrical guide sleeves, wherein in FIG. 1 a guide sleeve 86 can be seen.
  • the guide sleeves 86 form guide elements for the pistons 22 and are aligned coaxially with the respective piston longitudinal axis 76.
  • the guide plate 84 forms a convex lid which rests on a swash plate housing 88 in which a swash plate 90 is rotatably mounted about the pump longitudinal axis 64.
  • Each piston 20 is pressed by a return spring 92 against the swash plate 90.
  • the liquid is then pressurized in the pump chamber 20 until the pressure valve closing body 48 lifts against the closing force of the pressure valve closing spring 50 from the pressure valve seat 52 and thus releases the flow connection between the pump chamber 20 and the central chamber 56.
  • the pressure valve closing spring 50 is supported on the central insert part 58, whose passage 60 is released from the central closing body 62, so that the pressurized liquid can flow via the pressure line 66 to the pressure outlet 16.
  • the liquid can be placed in the pump chamber 20 under a pressure of over 100 bar.
  • a relatively low material thickness of the pump block 18 made of a plastic material can withstand the high pressures of the liquid.
  • the pressure valve seats 52 as already explained above, arranged offset in the radial direction and in the circumferential direction with respect to the pump longitudinal axis 64 to the Saugventilsitzen 30.
  • the piston pump 10 is therefore characterized by a high mechanical strength and a relatively low material strength.

Landscapes

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

Abstract

Pompe à pistons (10) pour un appareil de nettoyage à haute pression, comportant plusieurs cavités (20) dans chacune desquelles pénètre un piston (22) effectuant un mouvement de va-et-vient et qui se trouvent chacune en communication d'écoulement avec un orifice d'aspiration (14) par l'intermédiaire d'une soupape d'aspiration (24) et avec un orifice de refoulement (16) par l'intermédiaire d'une soupape de refoulement (26), la soupape d'aspiration (24) comportant un obturateur (28) qui peut venir s'appuyer de manière étanche contre un siège (30) de ladite soupape, et la soupape de refoulement (26) comportant un obturateur (48) qui peut venir s'appuyer de manière étanche contre un siège (52) de ladite soupape. Le siège (52) de la soupape de refoulement et le siège (30) de la soupape d'aspiration présentent des écarts radiaux différents par rapport à l'axe longitudinal (64) de la pompe. L'objet de la présente invention est de perfectionner ladite pompe à pistons de manière qu'elle permette une sollicitation mécanique accrue, sans augmentation de l'épaisseur des matériaux. A cet effet, le siège (52) de la soupape de refoulement est situé de manière décalée par rapport au siège (30) de la soupape d'aspiration dans la direction de la circonférence de la pompe à pistons, par rapport à l'axe longitudinal (64) de la pompe.
EP12700837.3A 2012-01-20 2012-01-20 Pompe à piston pour un appareil de nettoyage sous haute pression Active EP2805050B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/050869 WO2013107520A1 (fr) 2012-01-20 2012-01-20 Pompe à pistons pour appareil de nettoyage à haute pression

Publications (2)

Publication Number Publication Date
EP2805050A1 true EP2805050A1 (fr) 2014-11-26
EP2805050B1 EP2805050B1 (fr) 2016-07-27

Family

ID=45524553

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12700837.3A Active EP2805050B1 (fr) 2012-01-20 2012-01-20 Pompe à piston pour un appareil de nettoyage sous haute pression

Country Status (5)

Country Link
US (1) US20140328701A1 (fr)
EP (1) EP2805050B1 (fr)
CN (1) CN104053907B (fr)
BR (1) BR112014011579A2 (fr)
WO (1) WO2013107520A1 (fr)

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CA3212908A1 (fr) * 2016-05-06 2017-11-09 Active Products Inc. Pompe a eau a piston a plateau oscillant destinee a etre utilisee dans un nettoyeur a pression de gaz a faible debit ou un nettoyeur a pression electrique a faible courant
IT201600072149A1 (it) * 2016-07-11 2018-01-11 Leuco Spa Pompa per erogare un liquido.
US11578710B2 (en) 2019-05-02 2023-02-14 Kerr Machine Co. Fracturing pump with in-line fluid end
US11965503B2 (en) 2019-05-14 2024-04-23 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11739748B2 (en) 2019-05-14 2023-08-29 Halliburton Energy Services, Inc. Pump fluid end with easy access suction valve
US11261863B2 (en) 2019-05-14 2022-03-01 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11231111B2 (en) 2019-05-14 2022-01-25 Halliburton Energy Services, Inc. Pump valve seat with supplemental retention
US11441687B2 (en) 2019-05-14 2022-09-13 Halliburton Energy Services, Inc. Pump fluid end with positional indifference for maintenance
US11105327B2 (en) 2019-05-14 2021-08-31 Halliburton Energy Services, Inc. Valve assembly for a fluid end with limited access
US11560888B2 (en) 2019-05-14 2023-01-24 Halliburton Energy Services, Inc. Easy change pump plunger
US10808846B1 (en) 2019-05-14 2020-10-20 Halliburton Energy Services, Inc. Pump plunger with wrench features
US10808851B1 (en) 2019-06-10 2020-10-20 Halliburton Energy Services, Inc. Multi-material frac valve poppet
US11280326B2 (en) 2019-06-10 2022-03-22 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US10941766B2 (en) 2019-06-10 2021-03-09 Halliburton Energy Sendees, Inc. Multi-layer coating for plunger and/or packing sleeve
US10989188B2 (en) 2019-07-26 2021-04-27 Halliburton Energy Services, Inc. Oil field pumps with reduced maintenance
US10677380B1 (en) 2019-07-26 2020-06-09 Halliburton Energy Services, Inc. Fail safe suction hose for significantly moving suction port
IT201900020050A1 (it) * 2019-10-30 2021-04-30 Annovi Reverberi Spa Valvola bidirezionale automatica e pompa dotata di detta valvola
DE102020131796A1 (de) 2020-12-01 2022-06-02 Alfred Kärcher SE & Co. KG Kolbenpumpe für ein hochdruckreinigungsgerät
DE102020131798A1 (de) 2020-12-01 2022-06-02 Alfred Kärcher SE & Co. KG Kolbenpumpe für ein hochdruckreinigungsgerät
JP2023151480A (ja) * 2022-03-31 2023-10-16 川崎重工業株式会社 回転斜板式液圧ポンプ

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Also Published As

Publication number Publication date
WO2013107520A1 (fr) 2013-07-25
CN104053907A (zh) 2014-09-17
EP2805050B1 (fr) 2016-07-27
US20140328701A1 (en) 2014-11-06
BR112014011579A2 (pt) 2017-05-09
CN104053907B (zh) 2016-09-14

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