EP0990796B1 - Zusammenbau eines mechanischen oder hydraulischen Antriebs mit einer Kolbenpumpe - Google Patents
Zusammenbau eines mechanischen oder hydraulischen Antriebs mit einer Kolbenpumpe Download PDFInfo
- Publication number
- EP0990796B1 EP0990796B1 EP99307761A EP99307761A EP0990796B1 EP 0990796 B1 EP0990796 B1 EP 0990796B1 EP 99307761 A EP99307761 A EP 99307761A EP 99307761 A EP99307761 A EP 99307761A EP 0990796 B1 EP0990796 B1 EP 0990796B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pillars
- mounting plate
- assembly
- crosshead
- ram 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.)
- Expired - Lifetime
Links
Images
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
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- 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
Definitions
- 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 pillars or 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.
- 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.
- GB 677,136 and GB 2,159, 888A disclose a pumping apparatus in which a ram type piston is mounted on a crosshead which slides on two parallel vertical guide bars or pillars.
- the piston is linked directly to the piston rod of a double acting hydraulic ram mounted on the guide bars.
- GB 2,107,798 discloses a pumping apparatus for pumping liquids such as slurries comprising a pumping cylinder/piston driven by the piston/cylinder of an operating device, the supply of fluid under pressure being controlled by valve mechanism.
- ram pumps with two pillars or tie bars has been known for many years.
- the arrangement is a simple and effective means of mounting a hydraulic drive and drive piston for a ram pump.
- these pumps have problems with lack of stability of the mounting plate on the two pillars and with rocking and flexing of the pillars during use. Due to the effects of back pressure caused by the ram displacement piston, the wear factors increase with time. Thus, as the ram displacement piston is lifted up and down, it also rocks the piston from side to side, causing uneven wear of the ram displacement piston and thus shortening the life of the ram displacement piston seals.
- the twisting and yawing forces to which the ram pump and drive assembly is subjected can cause the life of the pump, in particular the seals, to be shortened.
- the invention provides a ram pump assembly in accordance with claim 1 and a mounting plate assembly in accordance with claim 11 of the appended claims.
- the mounting plate assembly comprises four pillars.
- the four pillars are arranged to form the four corners of a square.
- the drive means may comprise a hydraulic piston.
- 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.
- the drive means may comprise a crank drive.
- the hole in the mounting plate is advantageously square to allow reciprocating movement of the drive shaft arm of the crank drive.
- 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.
- 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.
- the crosshead comprises at least two arms with slidable attachment means at the ends that are slidably mounted on corresponding pillars.
- 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.
- the crosshead has two arms with slidable attachment means at the ends that are slidably mounted on pillars at opposed corners of the mounting plate.
- the four pillars are arranged at the four corners of a square and the crosshead slides up and down on two opposing pillars which thus form the longest point of the square.
- the crosshead is slidably mounted on the three pillars.
- the crosshead may have three arms with slidable attachment means at the ends that are slidably mounted on the three pillars or, alternatively, it may comprise a plate with three holes corresponding to the positions of the three pillars to enable the crosshead to move up and down the pillars.
- the ram pump piston is attached to the lower surface of the crosshead by bolts or screws.
- 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.
- the height of the pillars is selected to provide an optimum gap for the height of the hydraulic piston or crank.
- 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.
- the pillars are made of high tensile steel.
- 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 in accordance with claim 11 of the appended claims.
- the mounting plate assembly comprises four pillars.
- the four pillars are arranged to form the four corners of a square.
- a ram pump assembly 1 comprises a ram pump 2, having a pump body 3 and a pump piston 4, and a mounting plate assembly 5.
- the mounting plate assembly 5 comprises four high tensile steel pillars 6a,6b,6c,6d attached at their bases 7a,7b,7c,7d to the pump body 3 by fasteners such as screws (not shown) such that the pillars 6a,6b,6c,6d form the four corners of a square.
- 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.
- 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.
- 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.
- the arrangement of the invention has the particular advantage that the crosshead 15 is lifted up and down smoothly and does not jerk as will often happen with the prior art two pillared arrangements.
- the displacement piston 4 is also lifted up and down more consistently square with the pump body 3.
- Figure 3 shows an alternative embodiment of the invention.
- the drive means comprises a motor (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 31.
- 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 particular it increases the life of the pump seals.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Claims (14)
- Kolbenpumpen-Baueinheit (1), die folgendes umfasst:- eine Kolbenpumpe (2) mit einem Pumpenkörper (3) und Pumpenkolben-Einrichtungen (4),- Antriebseinrichtungen (12), die einen Antriebswellenarm (13, 31) umfassen, und- eine Montageplatten-Baueinhelt (5),
dadurch gekennzeichnet, dass die Montageplatten-Baueinheit (5) folgendes umfasst:- wenigstens drei Säulen (6), die an einem Ende am Pumpenkörper (3) befestigt sind,- eine Montageplatte (8), die an dem anderen Ende einer jeden der Säulen (6) befestigt ist und ein durch sie hindurchgehendes Loch (11) aufweist, und- einen Gleitkopf (15), der in verschieblicher Weise an wenigstens zwei der Säulen (6) montiert ist, wobei die Antriebseinrichtungen (12) an der Montageplatte (8) montiert sind, wobei sich der Antriebswellen-Arm (13, 31) durch das Loch (11) in der Montageplatte (8) erstreckt, und wobei der Antriebswellen-Arm (13, 31) an der einen Oberfläche des Gleitkopfes (15) und die Pumpenkolben-Einrichtungen (4) an der gegenüberliegenden Oberfläche des Gleitkopfes (15) montiert sind. - Kolbenpumpen-Baueinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Montageplatten-Baueinheit (5) vier Säulen (6) umfasst.
- Kolbenpumpen-Baueinheit (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Antriebseinrichtungen (12) einen Hydraulikkolben (13) umfassen.
- Kolbenpumpen-Baueinheit (1) nach Anspruch 3, dadurch gekennzeichnet, dass das Loch (11) in der Montageplatte (8) rund und so bemessen ist, dass es eine Gleitpassung für einen Flansch des durch es hindurch verlaufenden Hydraulikkolbens (13) liefert.
- Kolbenpumpen-Baueinheit (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Antriebseinrichtungen (12) einen Kurbelantrieb (30) umfassen.
- Kolbenpumpen-Baueinheit (1) nach Anspruch 5, dadurch gekennzeichnet, dass das Loch (11) in der Montageplatte (8) rechteckig ist, um eine Hin- und Herbewegung des Antriebswellenarms (31) des Kurbelantriebs (30) zu ermöglichen.
- Kolbenpumpen-Baueinheit (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Gleitkopf (15) wenigstens zwei Arme (16, 17) mit Gleitbefestigungseinrichtungen (18, 19) an den Enden umfasst, die in gleitender Weise an entsprechenden Säulen (6) montiert sind.
- Kolbenpumpen-Baueinheit (1) nach Anspruch 7, dadurch gekennzeichnet, dass die Befestigungseinrichtungen Hülsen (18, 19) umfassen, die über die Säulen (6) passen, so dass der Gleitkopf (15) auf und ab gleiten kann, aber starr so gehalten wird, dass er sich bezüglich des Pumpenkörpers (3) nicht seitlich bewegen kann.
- Kolbenpumpen-Baueinheit (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Höhe der Säulen (6) so gewählt ist, dass ein optimaler Zwischenraum für die Höhe des Antriebswellenams (13, 31) geschaffen wird.
- Kolbenpumpen-Baueinheit (1) nach Anspruch 9, dadurch gekennzeichnet, dass die Säulenhöhe eingestellt werden kann oder dass die Säulen (6) ausgewechselt werden können, um unterschiedliche Höhen zu ergeben, um zu ermöglichen, dass eine optimale Hublänge für verschiedene Abgabe-Strömungsraten erzielt werden kann.
- Montageplatten-Baueinheit (5) zur Verwendung mit einer Kolbenpumpe nach Anspruch 1, die die folgende Bestandteile umfasst:- wenigstens drei Säulen (6), die an einem Ende am Pumpenkörper (3) befestigt werden können,- eine Montageplatte (8), die am anderen Ende einer jeden der Säulen (6) befestigt ist und ein durch sie hindurchgehendes Loch (11) aufweist, und- einen Gleitkopf (15), der in verschieblicher Weise an wenigstens zwei der Säulen (6) montiert ist.
- Montageplatten-Baueinheit (5) nach Anspruch 11, dadurch gekennzeichnet, dass die Montageplatten-Baueinheit (5) vier Säulen (6) umfasst.
- Montageplatten-Baueinheit (5) nach Anspruch 11 oder 12, dadurch gekennzeichnet, dass der Gleitkopf (15) wenigstens zwei Arme (16, 17) mit Gleitbefestigungseinrichtungen (18, 19) an den Enden umfasst, die in verschieblicher Weise an entsprechenden Säulen (6) montiert sind.
- Montageplatten-Baueinheit (5) nach Anspruch 13, dadurch gekennzeichnet, dass die Befestigungseinrichtungen Hülsen (18, 19) umfassen, die so über die Säulen (6) passen, dass der Gleitkopf (15) auf und ab gleiten kann, aber festgehalten wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9821308 | 1998-10-02 | ||
GB9821308A GB2342405B (en) | 1998-10-02 | 1998-10-02 | Ram pump assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0990796A2 EP0990796A2 (de) | 2000-04-05 |
EP0990796A3 EP0990796A3 (de) | 2000-11-02 |
EP0990796B1 true EP0990796B1 (de) | 2006-03-01 |
Family
ID=10839756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99307761A Expired - Lifetime EP0990796B1 (de) | 1998-10-02 | 1999-09-30 | Zusammenbau eines mechanischen oder hydraulischen Antriebs mit einer Kolbenpumpe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0990796B1 (de) |
DE (1) | DE69930073T2 (de) |
GB (1) | GB2342405B (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2431699B (en) * | 2005-10-29 | 2010-06-02 | Vernon Frederick Thomas Green | Reciprocating air compressor |
Family Cites Families (5)
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 |
US3779088A (en) * | 1972-08-04 | 1973-12-18 | Ingersoll Rand Co | Crank mechanism |
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 |
GB2159888B (en) * | 1984-06-05 | 1987-11-04 | Willett & Co Limited Thomas | Pumping system |
-
1998
- 1998-10-02 GB GB9821308A patent/GB2342405B/en not_active Expired - Fee Related
-
1999
- 1999-09-30 DE DE69930073T patent/DE69930073T2/de not_active Expired - Fee Related
- 1999-09-30 EP EP99307761A patent/EP0990796B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB9821308D0 (en) | 1998-11-25 |
DE69930073T2 (de) | 2006-10-05 |
DE69930073D1 (de) | 2006-04-27 |
EP0990796A3 (de) | 2000-11-02 |
GB2342405B (en) | 2002-04-17 |
GB2342405A (en) | 2000-04-12 |
EP0990796A2 (de) | 2000-04-05 |
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