GB2272732A - High pressure reciprocating piston pump - Google Patents

High pressure reciprocating piston pump Download PDF

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Publication number
GB2272732A
GB2272732A GB9221203A GB9221203A GB2272732A GB 2272732 A GB2272732 A GB 2272732A GB 9221203 A GB9221203 A GB 9221203A GB 9221203 A GB9221203 A GB 9221203A GB 2272732 A GB2272732 A GB 2272732A
Authority
GB
United Kingdom
Prior art keywords
high pressure
water pump
pressure water
pads
pistons
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
GB9221203A
Other versions
GB9221203D0 (en
GB2272732B (en
Inventor
Gordon William Walke
Derek Vivian Ivor Santillo
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9221203A priority Critical patent/GB2272732B/en
Publication of GB9221203D0 publication Critical patent/GB9221203D0/en
Publication of GB2272732A publication Critical patent/GB2272732A/en
Application granted granted Critical
Publication of GB2272732B publication Critical patent/GB2272732B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • F04B1/0426—Arrangements for pressing the pistons against the actuated cam; Arrangements for connecting the pistons to the actuated cam
    • 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
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Landscapes

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

Abstract

A high pressure pump comprises a body defining radially arranged cylinders, end covers rotatably supporting a shaft (2) extending transversely to the axes of the cylinders, and at least one pair of opposed pistons arranged to reciprocate in aligned cylinders by an eccentric (2b) of the shaft. A bridging unit consisting of side members (6b) and pads (6a) couple the pistons of the or each pair together, the pads (6a) cooperating with a ring (2a) surrounding a roller bearing (5b) on the eccentric (2b). To allow the axes of the two crossing piston pairs to lie in the same plane, the side members (6b) of one bridging unit are displaced to one side of the plane while the side members of the other bridging unit are displaced to the other side of the plane. Several bodies may be assembled between the end covers to produce a range of pumps with many common parts. <IMAGE>

Description

HIGH PRESSURE WATER PUMP This invention relates to a high pressure water pump.
High pressure water pumps are well known and used in the cleaning of buildings, drains, ships and other similar applications.
The known designs consist of a housing, containing a plurality of pistons in close parallel format, to which the cylinder heads formed from a single piece is attached. The pistons are spring loaded against and reciprocated by means of a rotating swash plate or a crank shaft.
These pumps are known to be damaged by explosions within the cylinders, brought about by elevated operating temperatures due to inadequate dissipation of heat and at higher speeds pistons, which rely on springs, have a tendency to not remain in contact with the operating surface resulting in reduced volumetric efficiency with accompanying noise and mechanical wear.
According to the present invention there is provided a high pressure water pump composed of one or more radial units assembled between end covers. A rotatable shaft supported in bearings in the covers extends from one cover and is adaptable to the driving means.
A radial unit is composed of two piston assemblies reciprocated by an eccentric ring on a rotatable shaft, contained within a fixed body, which may be driven directly or indirectly by an electric motor or other prime mover.
A piston assembly is composed of two pistons fixed at the opposite ends of a bridging unit which is located on the eccentric ring. Two identical piston assemblies are assembled face to face in the configuration of a cross so that the four equally spaced pistons are in the same plane.
The bridging unit provides for the positive return strokes of the pistons and the cross shaped assembly of cylinders each with its independent cylinder head results in a radial four cylinder configuration to effectively dissipate heat.
A two cylinder in line radial unit is produced when only one piston assembly is used this has the same advantages as a four piston unit but with half its output.
One or more radial units may be joined together on a common shaft to form multi cylinder pump assemblies.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawings in which: Figure 1: is an axial section but showing some parts in full for reasons of clarity.
Figure 2: is a front elevation with the cover removed to shown the internal construction, also one radial cylinder is drawn in section showing the valves and galleries.
Figure 3: is a front elevation on the cover showing integral galleries. The integral regulating valve is not shown for reasons of clarity.
Referring now to the drawings, the pump comprises a fixed body 1 in which is rotatably mounted a shaft 2 supported in ball journals 5 and 5a which are supported within end covers 3 and 4 which are located on and attached to the body 1. An adaptor flange 3a to suit the driving member is located on and attached to the cover 3.
The shaft 2 has a circular eccentric diameter 2b on which an eccentric ring 2a is mounted, via a needle roller bearing 5b and around which two bridging units 6 are mounted face to face in the configuration of a cross.
A bridging unit consists of two pads 6a fixed rigidly in line, at a distance apart so as to locate closely on the eccentric ring 2a, by two side members 6b which are angularly displaced one to the other so that when two bridging units 6 are assembled as described they do not interfere one with the other even though all four pads 6a lie in the same plane on the circular eccentric ring 2a.
The pistons 7 are attached to the pads 6a by screws 8, or by other suitable means and are contained to reciprocate radially by guide bushing assemblies 9 which are held located in the body 1 by cylinder heads 10 which are also located in and attached to the body 1 by screws lOa.
The cylinder heads 10 contain non return valves lia and lib which are held in place by sealing plugs 12. Drillings lOb, lOc and lod in the cylinder head(s) 10 communicate with drillings la, ib, lc and id in the body 1 which also communicates with drillings in the cover 4, which preferably also includes a regulating valve in a known way but is not shown on the drawing for reason of clarity. The cover 4 has threaded ports for the connection of the supply and delivery pipes.
Rotation of 'the shaft 2, in either direction, will cause the pistons to reciprocate sequentially. When moving radially inwards the piston(s) draw liquid from a low pressure scurce through the valve(s) lib into the space(s) vacated by the piston(s) 7, liquid is prevented from entering via valve(s) ila because of their non return action. Liquid is expelled under pressure when the piston(s) move outwards in this case the valve(s) ila open due to the pressure created by the piston(s) 7 and liquid is prevented from returning to the low pressure source by the non return action of the valve(s) lib.

Claims (6)

1. A high pressure water pump composed of a radial unit
assembled between end covers. A rotatable shaft supported in bearings in the covers extending from one cover and adaptable to the driving means.
2. A high 'pressure water pump as claimed in claim 1 composed of more that one radial unit.
3. A high pressure water pump as claimed in claim 1 or claim 2 wherein a radial unit is composed of two piston assemblies reciprocated by an eccentric ring on a rotatable shaft contained within a fixed body.
4. A high pressure water pump as claimed in claim 3 wherein a piston assembly is composed of two pistons fixed at the opposlte ends of a bridging unit consisting of two pads fixed rigidly in line at a distance apart, so as to locate closely on the eccentric ring1 by two side members which are angularly displaced one to the other so that when two bridging units are assembled face to face in the configuration of a cross they do not interfere one with the other even though all the pads and pistons lie in the same plane.
5. A high pressure water pump as claimed in claim 1 or claim 2 wherein a radial unit is coposd of one piston assembly as described in claim 6. A high pressure water pump substantially as described herein with reference to figures 1-3 of the accompanying drawings.
Amendments to the claims have been filed as follows: 1. A high pressure water pump composed of a radial unit assembled between end covers. A rotatable shaft supported in bearings in the covers extending from one cover and adaptable to the driving means.
2. A high pressure water pump as claimed in Claim 1 composed of more than one radial unit.
3. A high pressure water pump as claimed in Claim 1 or Claim 2 wherein a radial unit is composed of two piston assemblies reciprocated by an eccentric ring on a rotatable shaft contained within a fixed body.
4. A high pressure water pump as claimed in Claim 3 wherein a piston assembly is composed of two pistons fixed at the opposite ends of a bridging unit consisting of two pads fixed rigidly in line at a distance apart, so as to locate closely on the eccentric ring, by two side members which are displaced from the common centre line of the pads and pistons so that when two identical piston assemblies are assembled face to face in the configuration of a cross they do not interfere one with the other even though the centre lines of the pads and pistons lie in the same plane thus ensuring that the radial forces are contained within the medial plane which provides balanced force loading through the pads and pistons. This feature allows for a length of the eccentric, equal to the distance taken up by the piston assembly, to be used in the provision of the pad area, which provides for centre line thrust and minimum compressive stress whilst containing the pads within the width of the piston arrangement and using identical piston assemblies.
5. A high pressure water pump as claimed in Claim 1 or Claim 2 wherein a radial unit is composed of one piston assembly as described in Claim 4.
6. A high pressure water pump substantially as described herein with reference to Figures 1-3 of the accompanying drawings.
GB9221203A 1992-10-08 1992-10-08 High pressure water pump Expired - Fee Related GB2272732B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9221203A GB2272732B (en) 1992-10-08 1992-10-08 High pressure water pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9221203A GB2272732B (en) 1992-10-08 1992-10-08 High pressure water pump

Publications (3)

Publication Number Publication Date
GB9221203D0 GB9221203D0 (en) 1992-11-25
GB2272732A true GB2272732A (en) 1994-05-25
GB2272732B GB2272732B (en) 1997-02-05

Family

ID=10723175

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9221203A Expired - Fee Related GB2272732B (en) 1992-10-08 1992-10-08 High pressure water pump

Country Status (1)

Country Link
GB (1) GB2272732B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564908A (en) * 1994-02-14 1996-10-15 Phillips Engineering Company Fluid pump having magnetic drive
WO1998015735A1 (en) * 1996-10-10 1998-04-16 Phillips Engineering Co. Piston pump and method of reducing vapor lock
CN102817825A (en) * 2012-08-29 2012-12-12 王吉华 High-precision marine bilge pump

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB407410A (en) * 1932-09-26 1934-03-22 Edward Alexander Stanley Swins An improved crank drive for pumps
GB627844A (en) * 1945-11-16 1949-08-17 Theo Patrignani A device for converting a rotary motion into a reciprocatory motion or vice versa
GB843104A (en) * 1955-06-25 1960-08-04 John Elmour Palmer Driving arrangements for multiple cylinder radial pumps
US3685923A (en) * 1970-11-06 1972-08-22 Gen Motors Corp Automotive air conditioning compressor
US4184817A (en) * 1977-12-01 1980-01-22 Lear Siegler, Inc. High pressure multi-cylinder pump
US4242062A (en) * 1979-08-06 1980-12-30 Lear Siegler, Inc. Dual piston pump with pressure seal lubrication feature
US4589329A (en) * 1982-06-18 1986-05-20 Guido Oberdorfer Piston machine having at least two pistons

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9217208D0 (en) * 1992-08-13 1992-09-23 Weeja Compressors Limited Improvements in compressors

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB407410A (en) * 1932-09-26 1934-03-22 Edward Alexander Stanley Swins An improved crank drive for pumps
GB627844A (en) * 1945-11-16 1949-08-17 Theo Patrignani A device for converting a rotary motion into a reciprocatory motion or vice versa
GB843104A (en) * 1955-06-25 1960-08-04 John Elmour Palmer Driving arrangements for multiple cylinder radial pumps
US3685923A (en) * 1970-11-06 1972-08-22 Gen Motors Corp Automotive air conditioning compressor
US4184817A (en) * 1977-12-01 1980-01-22 Lear Siegler, Inc. High pressure multi-cylinder pump
US4242062A (en) * 1979-08-06 1980-12-30 Lear Siegler, Inc. Dual piston pump with pressure seal lubrication feature
US4589329A (en) * 1982-06-18 1986-05-20 Guido Oberdorfer Piston machine having at least two pistons

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5564908A (en) * 1994-02-14 1996-10-15 Phillips Engineering Company Fluid pump having magnetic drive
US6024542A (en) * 1994-02-14 2000-02-15 Phillips Engineering Co. Piston pump and method of reducing vapor lock
US6179568B1 (en) 1994-02-14 2001-01-30 Phillips Engineering Co. Piston pump and method of reducing vapor lock
WO1998015735A1 (en) * 1996-10-10 1998-04-16 Phillips Engineering Co. Piston pump and method of reducing vapor lock
CN102817825A (en) * 2012-08-29 2012-12-12 王吉华 High-precision marine bilge pump
CN102817825B (en) * 2012-08-29 2015-07-15 王吉华 High-precision marine bilge pump

Also Published As

Publication number Publication date
GB9221203D0 (en) 1992-11-25
GB2272732B (en) 1997-02-05

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)
911A Proceeding under rule 110(4) of the patent rules 1990

Free format text: THE PATENT OFFICE RECEIVED ON 950424A REQUEST UNDER RULE 110(4) OF THE PATENTS RULES 1990 TO EXTENDTHE PERIOD PRESCRIBED IN RULE 33(2) FOR FILING FORM 10/77

911B Proceeding under rule 110 of the patent rules 1990

Free format text: RE-INSTATED FOLLOWING THE EXERCISE OF DISCRETION UNDER RULE 110(4)

PCNP Patent ceased through non-payment of renewal fee

Effective date: 19991008