GB2342405A - A mounting plate assembly with a guided crosshead for a ram piston pump - Google Patents

A mounting plate assembly with a guided crosshead for a ram piston pump Download PDF

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Publication number
GB2342405A
GB2342405A GB9821308A GB9821308A GB2342405A GB 2342405 A GB2342405 A GB 2342405A GB 9821308 A GB9821308 A GB 9821308A GB 9821308 A GB9821308 A GB 9821308A GB 2342405 A GB2342405 A GB 2342405A
Authority
GB
United Kingdom
Prior art keywords
mounting plate
pillars
assembly according
ram pump
crosshead
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
GB9821308A
Other versions
GB2342405B (en
GB9821308D0 (en
Inventor
Brendon Alexander Clarke
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.)
Brendon Clarke
Carl Clarke
Edit Clarke
Rene Clarke
Original Assignee
Brendon Clarke
Carl Clarke
Edit Clarke
Rene Clarke
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 Brendon Clarke, Carl Clarke, Edit Clarke, Rene Clarke filed Critical Brendon Clarke
Priority to GB9821308A priority Critical patent/GB2342405B/en
Publication of GB9821308D0 publication Critical patent/GB9821308D0/en
Priority to EP99307761A priority patent/EP0990796B1/en
Priority to DE69930073T priority patent/DE69930073T2/en
Publication of GB2342405A publication Critical patent/GB2342405A/en
Application granted granted Critical
Publication of GB2342405B publication Critical patent/GB2342405B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04B49/12—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 varying the length of stroke of the working members
    • 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
    • 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
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/1035—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber the movement of the pump piston in the two directions being obtained by two single-acting liquid motors each acting in one direction
    • 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
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0206—Length of piston stroke

Abstract

A mounting plate assembly comprises at least three pillars 6 attached to a pump body 3, a mounting plate 8 attached to the other end of the pillars 6 and having a hole therethrough and a crosshead 20 slidably mounted on at least two of the pillars 6. The crosshead 20 may be attached to a piston (not shown) of a ram pump and to a drive shaft arm 31. The arm 31 may be driven by a crank shaft 30 or by hydraulic means (12, fig. 1). The arm 31 passes through the hole in the mounting plate 8; the hole may be square or round. The height of pillars 6 may be selected to suit the hydraulic drive or crank and the pillars can be adjusted or replaced for various discharge flow rates. The mounting plate assembly reduces wear on the piston.

Description

2342405 RAM PUMP ASSEMBLY The invention relates to a ram pump assembly and
to a mounting plate assembly for use with a ram pump.
Ram pumps are reciprocating piston pumps which are often used for pumping fluids such as water or sewage. The ram pump comprises a pump piston arranged for reciprocating movement in a pump body and the pump piston is driven up and down by a drive piston which is, in turn, driven by a hydraulic drive mounted above or adjacent the pump. The hydraulic drive may be mounted on two tie bars attached to the pump body and the drive piston is attached to the pump piston by means of a rigid block to hold the drive piston and the pump piston stationary relative to one another. Alternatively, the drive may be provided by a motor and crank drive mounted at the side of the pump body with the crank drive arm connected to the pump piston.
The ram pump and drive assembly is subject to twisting and yawing forces that can cause the life of the pump, in particular the seals, to be shortened.
It is an object of the invention to provide an improved ram pump assembly that has longer pump life and improved seal life over existing arrangements.
It is a further object of the invention to provide a mounting plate assembly that is suitable for mounting a hydraulic drive or crank drive to a ram pump whilst reducing the twisting and yawing forces to which the ram pump piston is subjected.
2 The invention provides a ram pump assembly comprising:
a ram pump comprising a pump body and pump piston means; drive means having a drive shaft arm; and a mounting plate assembly, wherein the mounting plate assembly comprises:
at least three pillars attached at one end to the pump body; a mounting plate attached to the other end of the pillars and comprising a hole therethrough; and a crosshead slidably mounted on at least two of the pillars, and wherein the drive means is mounted on the mounting plate with the drive shaft arm extending through the hole in the mounting plate, the drive shaft arTn being attached to one surface of the crosshead and the pump piston means being attached to the opposed surface of the crosshead.
Advantageously the drive means may comprise a hydraulic piston. In this arrangement, the hole in the mounting plate is advantageously round and is sized to provide an easy fit for the flange of the hydraulic piston to pass through.
Alternatively, the drive means may comprise a crank drive. In this arrangement, the hole in the mounting plate is advantageously square to allow reciprocating movement of the drive shaft arm of the crank drive.
Preferably the drive shaft arm is attached to the upper surface of the crosshead by means of bolts or screws. If the drive shaft arm comprises a piston, it is preferably attached by a rigid connection to the crosshead.
3 Alternatively, if the drive shaft arm comprises a crank drive shaft arm, it is preferably attached by a suitable connection allowing relative rotational movement of the drive shaft arm with respect to the connection.
Advantageously, the crosshead comprises at least two arms with slidable attachment means at the ends that are slidably mounted on correspond g pillars. Advantageously the attachment means comprise sleeves that fit over the pillars so that the crosshead can slide up and down but is held rigidly so that it cannot move sideways with respect to the pump body. The crosshead may have more than two arms and attachment means, of fewer than or of a corresponding number to the number of pillars.
Preferably the ram pump piston is attached to the lower surface of the crosshead by bolts or screws.
Preferably the mounting plate comprises a heavily constructed casting or fabrication to support the drive means such as a hydraulic unit or motor and gearbox arrangement.
Preferably the height of the pillars is selected to provide an optimum gap for the height of the hydraulic piston or crank. Advantageously the pillar height can be adjusted or the pillars can be changed to provide different heights to enable the optimum stroke length of the pump piston to be achieved for various discharge flow rates.
4 Preferably the pillars are made of high tensile steel. Advantageously the pillars are attached to the ram pump body and the mounting plate by removable fasteners.
The invention further provides a mounting plate assembly for a ram pump comprising:
at least three pillars adapted to be attached at one end to the pump body; a mounting plate attached to the other end of the pillars and comprising a hole therethrough; and a crosshead slidably mounted on at least two of the pillars.
The invention will now be described, by way of example only, by reference to the accompanying drawings, of which:
Figure 1 shows a side view of one embodiment of a ram pump assembly according to the invention; Figure 2 shows an isometric view of a mounting plate forming part of the 20 ram pump assembly shown in Figure 1; and Figure 3 shows an isometric view of a second embodiment of a ram pump assembly according to the invention.
As shown in Figure 1, a ram pump assembly 1 according to the invention comprises a ram pump 2, having a pump body 3 and a pump piston 4, and a mounting plate assembly 5.
Referring also to Figure 2, the mounting plate assembly 5 -comprises four high tensile steel pillars 6a,6b,6c,6d attached at their bases 7ajb,7c,7d to the pump body 3 by fasteners such as screws (not shown). A mounting plate 8 is attached by fasteners (not shown) through holes 9a,9b,9c,9d to the tops 10a,10b,10c,10d of the pillars 6a,6b,6c,6d.
The mounting plate 8 has a hole 11 through the centre. Mounted on plate 8 is a hydraulic motor 12 having a drive arm, or hydraulic piston, 13 which extends down through the hole 11.
The drive arm 13 is attached to link means 14 on the upper surface of a crosshead 15. The crosshead 15 has two extending arms 16,17, each having a sleeve 18,19 at the end that is slidably fitted on opposing pillars 6a, 6d.
The pump piston 4 is fastened to the lower surface of a flange 20 on the crosshead 15.
In use, the hydraulic motor 12 moves the drive arm 13 up and down through the hole 11. This moves the crosshead 15, with the pump piston 4 attached, up and down, thus transferring energy from the hydraulic motor 12 to the ram pump 2. The pillars 6a,6b,6c,6d hold the mounting plate assembly 5 rigidly and with maximum stability with respect to the pump 2. The height of the pillars 6a,6b,6c,6d is selected to provide a sufficient gap for the stroke of the pump piston 4 to provide a desired flow rate.
6 Figure 3 shows an alternative embodiment of the invention. Features corresponding to those shown in Figures 1 and 2 have corresponding reference numerals. In this embodiment, the drive means comprises a motor 5 (not shown) driving a crank shaft 30 which in turn causes a drive shaft arm 31 to be reciprocated up and down through a hole 32 in the mounting plate 8.
The hole 32 is square to allow for the side to side movement of the drive shaft arm 3 1. Pump piston 4 is not shown in this figure, for clarity.
The arrangement of the mounting plate enables energy to be transferred from the drive means via a piston or shaft through the crosshead to the ram pump piston. The three or more pillars hold the mounting plate rigidly and prevent yawing and twisting of the drive means with respect to the ram pump. This extends the life of the seals and other pump elements.
The arrangement prevents bending or twisting of the construction whilst it is in operation, which can be caused by the forces created by the drive means when the pump is in operation. Keeping these forces in check, as is achieved by the invention, increases the overall lifetime of the ram pump, in 20 particular it increases the life of the pump seals.
7

Claims (21)

1. A ram pump assembly comprising:
a ram pump comprising a pump body and pump piston means; drive means having a drive shaft arm; and a mounting plate assembly, wherein the mounting plate assembly comprises:
at least three pillars attached at one end to the pump body; a mounting plate attached to the other end of the pillars and comprising a hole therethrough; and a crosshead slidably mounted on at least two of the pillars, and wherein the drive means is mounted on the mounting plate with the drive shaft arm extending through the hole in the mounting plate, the drive shaft arm being attached to one surface of the crosshead and the pump piston means being attached to the opposed surface of the crosshead.
2. A ram pump assembly according to claim 1 wherein the drive means comprises a hydraulic piston.
3. A ram pump assembly according to claim 2 wherein the hole in the mounting plate is round and is sized to provide an easy fit for a flange of the hydraulic piston to pass through.
4. A ram pump assembly according to claim 1 wherein the drive means comprises a crank drive.
8
5. A ram pump assembly according to claim 4 wherein -the hole in the mounting plate is square to allow reciprocating movement of tile drive shaft 5 arm of the crank drive.
6. A ram pump assembly according to any one of the preceding claims wherein the crosshead comprises at least two arms with slidable attachment means at the ends that are slidably mounted on corresponding pillars.
7. A ram pump assembly according to claim 6 wherein the attachment means comprise sleeves that fit over the pillars so that the crosshead can slide up and down but is held rigidly so that it cannot move sideways with respect to the pump body.
8. A ram pump assembly according to any one of the preceding claims wherein the height of the pillars is selected to provide an optimum gap for the height of the hydraulic piston or crank.
9. A ram pump assembly according to claim 8 wherein the pillar height can be adjusted or the pillars can be changed to provide different heights to enable the optimum stroke length to be achieved for various discharge flow rates.
10. A ram pump assembly according to any one of the preceding claims wherein the pillars are made of high tensile steel.
9
11. A ram pump assembly according to any one of the preceding claims wherein the pillars are attached to the ram pump body and the, mounting plate by removable fasteners.
12. A mounting plate assembly for a ram pump comprising: at least three pillars adapted to be attached at one end to the pump body; a mounting plate attached to the other end of the pillars and comprising a hole therethrough; and a crosshead slidably mounted on at least two of the pillars.
13. A mounting plate assembly according to claim 12 wherein the hole in the mounting plate is round.
14. A mounting plate assembly according to claim 12 wherein the hole in the mounting plate is square.
15. A mounting plate assembly according to any one of claims 12 to 14 wherein the crosshead comprises at least two arms with slidable attachment means at the ends that are slidably mounted on corresponding pillars.
16. A mounting plate assembly according to claim 15 wherein the attachment means comprise sleeves that fit over the pillars so that the crosshead can slide up and down but is held rigidly.
17. A mounting plate assembly according to any one of claims 12 to 16 wherein the pillars are made of high tensile steel.
18. A ram pump assembly as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
19. A ram pump assembly as hereinbefore, described with reference to Figure 3 of the accompanying drawings.
20. A mounting plate assembly as hereinbefore described with reference to Figures 1 and 2 of the accompanying drawings.
21. A mounting plate assembly as hereinbefore described with reference to Figure 3 of the accompanying drawings.
GB9821308A 1998-10-02 1998-10-02 Ram pump assembly Expired - Fee Related GB2342405B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9821308A GB2342405B (en) 1998-10-02 1998-10-02 Ram pump assembly
EP99307761A EP0990796B1 (en) 1998-10-02 1999-09-30 Assembly of a mechanical or hydraulic drive and a piston pump
DE69930073T DE69930073T2 (en) 1998-10-02 1999-09-30 Assembly of a mechanical or hydraulic drive with a piston pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9821308A GB2342405B (en) 1998-10-02 1998-10-02 Ram pump assembly

Publications (3)

Publication Number Publication Date
GB9821308D0 GB9821308D0 (en) 1998-11-25
GB2342405A true GB2342405A (en) 2000-04-12
GB2342405B GB2342405B (en) 2002-04-17

Family

ID=10839756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9821308A Expired - Fee Related GB2342405B (en) 1998-10-02 1998-10-02 Ram pump assembly

Country Status (3)

Country Link
EP (1) EP0990796B1 (en)
DE (1) DE69930073T2 (en)
GB (1) GB2342405B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2431699B (en) * 2005-10-29 2010-06-02 Vernon Frederick Thomas Green Reciprocating air compressor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677136A (en) * 1949-08-05 1952-08-13 Thomas Willett & Company Ltd Improvements relating to a reciprocating pump for pumping liquid clay or slip into a filter press
GB1398362A (en) * 1972-08-04 1975-06-18 Ingersoll Rand Co Crank mechanism
GB2159888A (en) * 1984-06-05 1985-12-11 Willett & Co Limited Thomas Pumping system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1600749A (en) * 1977-07-22 1981-10-21 Willett Thomas & Co Ltd Liquid dispensing systems
GB2107798B (en) * 1978-10-14 1983-09-07 Thomas Arthur Craggs Liquid pumping apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB677136A (en) * 1949-08-05 1952-08-13 Thomas Willett & Company Ltd Improvements relating to a reciprocating pump for pumping liquid clay or slip into a filter press
GB1398362A (en) * 1972-08-04 1975-06-18 Ingersoll Rand Co Crank mechanism
GB2159888A (en) * 1984-06-05 1985-12-11 Willett & Co Limited Thomas Pumping system

Also Published As

Publication number Publication date
GB2342405B (en) 2002-04-17
DE69930073T2 (en) 2006-10-05
GB9821308D0 (en) 1998-11-25
EP0990796A3 (en) 2000-11-02
EP0990796A2 (en) 2000-04-05
EP0990796B1 (en) 2006-03-01
DE69930073D1 (en) 2006-04-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20041002