EP0281794B1 - Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe - Google Patents

Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe Download PDF

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Publication number
EP0281794B1
EP0281794B1 EP88102159A EP88102159A EP0281794B1 EP 0281794 B1 EP0281794 B1 EP 0281794B1 EP 88102159 A EP88102159 A EP 88102159A EP 88102159 A EP88102159 A EP 88102159A EP 0281794 B1 EP0281794 B1 EP 0281794B1
Authority
EP
European Patent Office
Prior art keywords
motor
control device
piston
piston pump
space
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.)
Expired - Lifetime
Application number
EP88102159A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0281794A1 (de
Inventor
Wilfried Schlinkheider
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.)
Graco Verfahrenstechnik GmbH
Original Assignee
Graco Verfahrenstechnik GmbH
Boellhoff Verbindungstechnik GmbH
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6321912&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0281794(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Graco Verfahrenstechnik GmbH, Boellhoff Verbindungstechnik GmbH filed Critical Graco Verfahrenstechnik GmbH
Priority to AT88102159T priority Critical patent/ATE56502T1/de
Publication of EP0281794A1 publication Critical patent/EP0281794A1/de
Application granted granted Critical
Publication of EP0281794B1 publication Critical patent/EP0281794B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/125—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber reciprocating movement of the pumping member being obtained by a double-acting elastic-fluid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F01B17/02—Engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L23/00—Valves controlled by impact by piston, e.g. in free-piston machines

Definitions

  • the invention relates to a liquid piston pump driven by a compressed air piston motor according to the preamble of claim 1.
  • Such motor-pump combinations are often used to generate higher liquid pressures with a comparatively low air pressure. They are used to operate grease guns, clamping hydraulics and the like.
  • a particularly important area of application is the generation of pressure for hydrostatically operating paint spraying devices, so-called “airless” spraying devices, in which pressures of 30 to 300 bar are required, depending on the material to be sprayed and the use of additional air (so-called “airless plus” process).
  • a rinsing chamber is provided above the pump, which is filled with a detergent. This cleans and lubricates the pump piston rod, which emerges from the pump housing with every stroke, and increases the service life of the highly loaded pump seal. However, it must be prevented that paint residues, especially if they have hardened, are dragged into the engine seal. In addition, the coupling between the motor and pump must not run in seals. For these reasons, a free space (lantern space) is provided between the top of the flushing chamber, which is essentially defined by the fill level, in which the coupling can move back and forth and into which the motor piston rod can be immersed without using detergent To come into contact.
  • the control device for the engine and a soundproofing space are arranged laterally next to its cylinder.
  • This control device can only be operated pneumatically using pilot valves on the top of the engine. Because of the lateral projection, a larger footprint is required.
  • a lubricant pump driven by a compressed air piston motor is known (US Pat. No. 2,637,304), in which the control device of the motor is located between the latter and the pump.
  • the coupling point is located inside the pump.
  • the control device has a control sleeve which is axially displaced by two stop faces of the piston rod at the stroke ends.
  • the invention is based on the object of specifying a liquid piston pump which is driven by a compressed air piston motor and which has smaller overall dimensions.
  • the distance required for units with a flushing chamber is used by arranging the coupling point and accommodating the control device. This does not require an increase in the cross section or an increase in the overall height. Because of the height dimension of the control device and the use of the control sleeve, the coupling point has sufficient space available during its movement play.
  • the control device can be mechanically actuated directly by the piston rod. No stroke reduction gears are required here. Furthermore, there is no need for an additional coupling element that extends outwards. The driver can be easily attached and leads to a very simple yet safe actuation of the control device.
  • the free space Since the necessary distance between the flushing chamber and the motor, which is dependent on the stroke, is used for accommodating the control device, it is recommended that the free space also forms at least part of the relaxation space. In this way, there is a relatively large relaxation space and thus good sound absorption.
  • control device and the cylinder of the motor are surrounded by a common cylindrical wall.
  • Motor and control device are offered in a compact, smooth design, which is optically beautiful and technically expedient. Since the common wall also surrounds the cylinder of the engine, the interior serving as a relaxation space is enlarged.
  • the common cylindrical wall can also be permeable to air. As a result, the exhaust air is discharged to the outside over a large area, as a result of which the noise is reduced again.
  • control housing which is attached to the engine at its upper end face, carries an end wall at its lower end face, has an interior space connected to the compressed air supply line, which is additionally limited by the control sleeve, the flat slide valve and the slide seat, and outside is surrounded by a room for extracting the exhaust air.
  • the compressed air and the exhaust air are separated from each other in a simple manner.
  • flushing chamber at the top and the cylinder of the motor are each closed off by a fixed wall, between which the control device is located. These solid walls reduce noise transmission through structure-borne noise.
  • the drip pan can be formed in particular by the lower end wall of the control device.
  • a liquid piston pump 1 is illustrated below, which with its pump piston 2 indicated by dashed lines in each case draws in liquid at the inlet 3 and releases it under high pressure at the outlet 4. It is driven by a compressed air motor 5 with a piston 6 shown in dashed lines. Its piston rod 7 is connected to the pump piston 2 via a coupling 7a. Above the pump 1 there is a rinsing chamber 8, which is filled with a detergent and cleans and lubricates the pump piston 2 or the associated piston rod 2a, which emerges from the pump on each stroke.
  • the piston rod 2a passes through a pump seal, not shown, at the upper end of the piston pump 1, the piston rod 7 passes through an engine seal, not shown in FIG. 1, at the lower end of the compressed air motor 5.
  • a distance A is required between the rinsing chamber 8 and the engine 5, which must be at least so large that the coupling 7a is neither immersed in the engine seal nor in the pump seal and no paint residues can settle on the engine piston rod 7.
  • this distance is filled by a control device 9 for the motor 5. It has an inlet connection 10 for the compressed air, while the outlet 11 of the exhaust air here takes place over the entire circumference, but alternatively can also take place at a defined point in order to be able to direct the exhaust air into an adjoining room or into the open.
  • the compressed air piston motor 5 has an upper end wall 12 and a lower end wall 13, which are clamped together by means of screws 15 with the interposition of a hollow cylinder 14.
  • the piston 6 provided with a circumferential seal 17 can be moved back and forth.
  • This is provided with a piston rod 7 which passes through a seal 18 and consists of an upper part 19 and a lower part 20 which are connected to one another and to the piston 6 by a screw 21.
  • the control device 9 has a control housing 22, the upper end face of which bears against the fixed wall 13 of the motor with the interposition of a seal 23 and is fastened there by screws 24.
  • the lower end wall carries an end wall 25 and can be connected to an upper fixed wall 26 of the washing chamber 8, indicated by dashed lines, by means of threaded bolts.
  • the piston rod 7 is surrounded by a control sleeve 27 which can be taken back and forth by a driver 28 between the two rod sections 19 and 20 shortly before the end positions of the stroke are reached.
  • the control sleeve has corresponding stops 29 and 30.
  • a flat slide 31, which interacts with a slide seat 32, can be taken from the control sleeve 27.
  • the slide seat 32 has channels 33 and 34, which cause a reversal of the working air each Weil in the rooms 35 and 36 above and below the piston 6.
  • Compressed air supplied via the connecting piece 10 therefore first enters an interior space 37 of the control housing 22, from which it reaches the space 36, so that the piston 6 is pressed upward.
  • the displaced air passes from room 35 into a room 38 inside the flat slide valve 31 and then through a bore 39 into a relaxation room 40 outside the control housing 22.
  • a preferably conical distributor body 41 can achieve a distribution of the exhaust air that is as uniform as possible.
  • a continuous cylindrical wall 42 made of air-permeable material surrounds the cylinder 16 and the control device 9.
  • the expansion space thus also extends into the annular space between the hollow cylinder 14 and the cylindrical wall 42. Exhaust air can escape all the way out of this wall 42 over the entire height.
  • a defined point can also be provided for the outlet, for example in order to discharge the exhaust air via a line.
  • the lower end wall 25 is designed as a condensate collecting trough and is provided with a drain hole 43 for condensate removal.
  • a drain line can be connected to this, for example.
  • the basic structure of the control device is known from the diaphragm pump 001.085-DP from Kopperschmidt-Mueller GmbH & Co. KG in Bielefeld.
  • control device 9 can also have a different shape, as is known from the prior art, provided there is space for the piston rod 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Compressor (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP88102159A 1987-02-27 1988-02-15 Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe Expired - Lifetime EP0281794B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88102159T ATE56502T1 (de) 1987-02-27 1988-02-15 Durch einen druckluft-kolbenmotor angetriebene fluessigkeits-kolbenpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3706351 1987-02-27
DE3706351A DE3706351C3 (de) 1987-02-27 1987-02-27 Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe

Publications (2)

Publication Number Publication Date
EP0281794A1 EP0281794A1 (de) 1988-09-14
EP0281794B1 true EP0281794B1 (de) 1990-09-12

Family

ID=6321912

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88102159A Expired - Lifetime EP0281794B1 (de) 1987-02-27 1988-02-15 Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe

Country Status (6)

Country Link
US (1) US4895497A (enrdf_load_stackoverflow)
EP (1) EP0281794B1 (enrdf_load_stackoverflow)
AT (1) ATE56502T1 (enrdf_load_stackoverflow)
BR (1) BR8800845A (enrdf_load_stackoverflow)
DE (1) DE3706351C3 (enrdf_load_stackoverflow)
ES (1) ES2018056B3 (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4014536C2 (de) * 1990-05-07 1997-06-12 Boellhoff Verfahrenstech Mit Druckluft betriebener Axialkolbenmotor
US5213881A (en) * 1990-06-18 1993-05-25 Kimberly-Clark Corporation Nonwoven web with improved barrier properties
DE4425397C2 (de) * 1994-07-19 1997-04-24 Boellhoff Verfahrenstech Durch einen Druckluft-Kolbenmotor angetriebene Flüssigkeits-Kolbenpumpe
JP3419574B2 (ja) * 1994-12-21 2003-06-23 株式会社アーレスティ 送液用ポンプ
AU4783996A (en) * 1996-02-26 1997-09-16 T. Smedegaard A/S Apparatus for use in a liquid circulation system and method for using said apparatus
US5626467A (en) * 1996-04-04 1997-05-06 Teledyne Industries, Inc. Modular pump
US6152706A (en) * 1996-07-03 2000-11-28 Lund; Gustav Andrew Pneumatic pump and control means therefor
CN1070225C (zh) * 1998-07-24 2001-08-29 中国船舶工业总公司第七研究院第七一八研究所 发动机润滑系统清洗剂
EP1030059A1 (de) * 1999-02-19 2000-08-23 Pressol Schmiergeräte GmbH Druckluftmotor für eine Schmierstoffpumpe
US6280149B1 (en) 1999-10-28 2001-08-28 Ingersoll-Rand Company Active feedback apparatus and air driven diaphragm pumps incorporating same
US6398514B1 (en) * 2000-11-22 2002-06-04 Steve C. Smith Double-acting rod pump
US20060171827A1 (en) * 2004-04-14 2006-08-03 Smith Steve C Crossover switching and pump system
US7625190B2 (en) * 2004-04-14 2009-12-01 K.R. Anderson, Inc. Crossover switching valve
DE102006026274A1 (de) * 2006-06-02 2007-12-06 Willy Vogel Ag Selbsttätige Schmierpumpe mit doppelt wirkendem Antriebskolben
CA2961763C (en) 2014-09-19 2019-01-08 Flow Control Llc. Automatic fill control technique
CL2015001798A1 (es) * 2015-06-22 2015-10-02 Martinez Mauricio Eduardo Mulet Cámaras concéntricas enumeradas desde la más externa; a la mas interna n; que se alimentan de un gas o liquido a presion, en medio de las cuales puede ir multiplicadores de presión simples, cada uno está formado por dos cilindros y émbolos unidos de manera que ambos cilindros-émbolos se abren o se cierran simultáneamente; de manera que uno hace de motor neumático o hidraulico que descarga a baja presion; interconectado al otro que hace de compresor o bomba, que descarga a alta presion.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2443568A (en) * 1945-01-01 1948-06-15 Stewart Warner Corp Reciprocatory fluid pressure operated motor with piston actuated distributing valve
US2637304A (en) 1950-01-05 1953-05-05 Stewart Warner Corp Valve mechanism for reciprocating fluid motors
US2740384A (en) * 1953-12-04 1956-04-03 Stewart Warner Corp Reciprocating fluid motor and valve control therefor
US3635125A (en) * 1969-03-21 1972-01-18 Nordson Corp Double-acting hydraulic pump and air motor therefor
US4436493A (en) * 1979-09-21 1984-03-13 The Coca-Cola Company Self contained pump and reversing mechanism therefor
AT383201B (de) * 1980-05-02 1987-06-10 Mato Masch & Metallwaren Pressluftbetaetigte schmierpumpe
DE3342388C3 (de) * 1983-11-24 1996-05-23 Wagner Wilhelm Wiwa Luftmotor für Farbspritzgeräte, Fettpressen und dergleichen
US4566867A (en) * 1984-07-02 1986-01-28 Alberto Bazan Dual diaphragm pump

Also Published As

Publication number Publication date
DE3706351C2 (enrdf_load_stackoverflow) 1989-03-09
DE3706351A1 (de) 1988-09-08
DE3706351C3 (de) 1994-04-14
ATE56502T1 (de) 1990-09-15
EP0281794A1 (de) 1988-09-14
ES2018056B3 (es) 1991-03-16
US4895497A (en) 1990-01-23
BR8800845A (pt) 1988-10-04

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