GB2272732A - High pressure reciprocating piston pump - Google Patents
High pressure reciprocating piston pump Download PDFInfo
- 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
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
- F04B1/04—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.
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)
| 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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9217208D0 (en) * | 1992-08-13 | 1992-09-23 | Weeja Compressors Limited | Improvements in compressors |
-
1992
- 1992-10-08 GB GB9221203A patent/GB2272732B/en not_active Expired - Fee Related
Patent Citations (7)
| 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)
| 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 |