GB684551A - Improvements in hydraulic pumps or motors - Google Patents

Improvements in hydraulic pumps or motors

Info

Publication number
GB684551A
GB684551A GB2873245A GB2873245A GB684551A GB 684551 A GB684551 A GB 684551A GB 2873245 A GB2873245 A GB 2873245A GB 2873245 A GB2873245 A GB 2873245A GB 684551 A GB684551 A GB 684551A
Authority
GB
United Kingdom
Prior art keywords
pump
port
pressure
cylinder
ports
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
Application number
GB2873245A
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.)
LUDW VON ROLL SCHEN EISENWERKE
Original Assignee
LUDW VON ROLL SCHEN EISENWERKE
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
Priority to CH974232X priority Critical
Application filed by LUDW VON ROLL SCHEN EISENWERKE filed Critical LUDW VON ROLL SCHEN EISENWERKE
Publication of GB684551A publication Critical patent/GB684551A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B1/00Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements
    • F01B1/06Reciprocating-piston machines or engines characterised by number or relative disposition of cylinders or by being built-up from separate cylinder-crankcase elements with cylinders in star or fan arrangement
    • F01B1/0675Controlling
    • F01B1/0686Controlling by changing the effective piston stroke
    • F01B1/0689Controlling by changing the effective piston stroke by changing the excentricity of one element relative to another element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0047Particularities in the contacting area between cylinder barrel and valve plate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0052Cylinder barrel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0055Valve means, e.g. valve plate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0032Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F01B3/0044Component parts, details, e.g. valves, sealings, lubrication
    • F01B3/0064Machine housing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01BMACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/10Control of working-fluid admission or discharge peculiar thereto
    • F01B3/103Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block
    • F01B3/109Control of working-fluid admission or discharge peculiar thereto for machines with rotary cylinder block by changing the inclination of the axis of the cylinder barrel relative to the swash plate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/18Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders having self-acting distribution members, i.e. actuated by working fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014Details or component parts
    • F04B1/2042Valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00Pumping installations or systems
    • F04B23/04Combinations of two or more pumps
    • F04B23/06Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14Pistons, piston-rods or piston-rod connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H39/00Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution

Abstract

684,551. Revolving-cylinder pumps. VON ROLL' SCHEN EISENWERKE AKT.-GES., L. Oct. 30, 1945 [Oct. 30, 1944], No. 28732/45. Class 102 (i) [Also in Group XXIX] A rotable cylinder block is movable over a non-rotary control surface provided with an inlet port and an outlet port and at least one additional port is provided in the control surface which connects the several cylinders successively during their transfer from the inlet port to the outlet port with a space in which a predetermined pressure is maintained by means of a pump or acts through a very light valve which operates instantaneously each time the additional port is connected to a cylinder to connect the latter with the next following port in the control surface. Fig. 1 shows the face of a valve block of a revolving cylinder swashplate type hydraulic pump of the kind in which the end of a cylinder barrel containing cylinders parallel to the axis of rotation of the barrel co-operates with the valve block to control the flow of liquid into and out of the cylinders. The valve comprises a pressure port 10 and a suction port 11. Between these ports are either provided ports 13 and 18 or ports 19. Fig. 2 shows the port 13 connected with the pressure port 10 by way of a passage containing a non-return valve 14. The opening 18 co-operates with a valve which allows the oil from the inlet side to flow into the cylinder as soon as the pressure is substantially reduced in the cylinder. If the alternative openings 19 are used these are connected to pumps. For example an opening 19 can be fed from a charging or feed pump which is used in some cases to place the inlet pipe under excess pressure. In a modification designed to permit reversal of the direction of rotation the ports 13 are arranged to be equidistant from the adjacent end of the pressure and suction ports and as shown in Fig. 6 a ball valve is provided so that the rear side of the non-return valve is connected to whichever port 10 or 11 is under pressure. In another modification the ports 13 instead of being connected to either the pressure or suction ports could be connected each to a separate pump or to sources of liquid under pressure. A single pump could be used, its suction side being connected to one port and its pressure side to the other. Fig. 9 shows a pump 33 which in the case of a seven cylinder pump is driven by a transmission gear of 7:1 ratio from the pump main shaft. The crank is adjusted so that it leaves the dead centre position when one of the pump cylinders has reached a position corresponding to the dead centre position of its piston which is the case when it is located at the middle of the surface between the adjacent ends of the inlet and outlet ports. The crank 34 of the pump 33 could be adjustable or the adjustment of the pump relative to its driving shaft could be effected by longitudinal movements of a pinion 35 with inclined teeth. Alternatively the crank could be replaced by driving gear employing several aligned cams any of which could be selected by sliding movement. Use of driving arrangements of known hydraulic pumps with axially or radially arranged cylinder is referred to. There could be two pumps similar to 33 or one double acting pump in the case of a pump with an even number of cylinders. The pump 33 must be fed with liquid. As a rule a connection to a pressure feed pipe through a non-return valve is advisable. The separate pump could be an adjustable piston pump. Additional liquid may be supplied to or withdrawn from the cylinders directly. The invention is stated to be applicable to radial cylinder machines. A pump comprising a cam actuated plunger may be mounted in the valve block. Also it is possible to use a pump which alternately serves one or other opening 13. This arrangement can be used where there is an uneven number of cylinders. It is possible to increase the spacing between the ports in control surface and obtain the desired quietness of running. The Specification as open to inspection under Sect. 91, contains further details. For example it refers to use of a throttle valve in cases where oil is fed under pressure to the control surface. The throttle valve may be arranged so that it is opened only during the time when its effect is necessary and is closed during the remainder of the time by the rotating cylinder barrel. The additional ports and valve instead of being provided in the port block can be located in the cylinder barrel. It is stated that the source of pressure may be a pressure accumulator. This subjectmatter does not appear in the Specification as accepted.
GB2873245A 1944-10-30 1945-10-30 Improvements in hydraulic pumps or motors Expired GB684551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH974232X 1944-10-30

Publications (1)

Publication Number Publication Date
GB684551A true GB684551A (en) 1952-12-17

Family

ID=4551112

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2873245A Expired GB684551A (en) 1944-10-30 1945-10-30 Improvements in hydraulic pumps or motors

Country Status (4)

Country Link
CH (1) CH252204A (en)
DE (1) DE974232C (en)
FR (1) FR956823A (en)
GB (1) GB684551A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3199461A (en) * 1963-05-27 1965-08-10 Cessna Aircraft Co Hydraulic pump or motor
US3200761A (en) * 1962-05-12 1965-08-17 Council Scient Ind Res Hydraulic positive displacement rotary machines
DE1211943B (en) * 1957-01-18 1966-03-03 Bosch Gmbh Robert Device for noise reduction in a rotary valve-controlled hydraulic axial or radial piston machine that can be used as a pump or motor
DE1228513B (en) * 1960-03-10 1966-11-10 Kloeckner Humboldt Deutz Ag Device for noise reduction in pressure fluid axial piston machines
DE1233267B (en) * 1959-08-21 1967-01-26 Citroen Sa Device for noise reduction in slide-controlled pumps and liquid motors
US3457873A (en) * 1967-03-20 1969-07-29 Sperry Rand Corp Pumping chamber decompression
US3604314A (en) * 1968-05-06 1971-09-14 Mannesmann Meer Ag Hydrostatic axial piston machine
US3847057A (en) * 1971-04-16 1974-11-12 Bosch Gmbh Robert Precharging arrangement for a hydraulic displacement machine
US3956972A (en) * 1973-06-15 1976-05-18 Robert Cecil Clerk Axial piston pumps or motors
US3999466A (en) * 1973-06-30 1976-12-28 Eckhard Aschke Hydrostatic pump/motor unit
US4117770A (en) * 1976-05-13 1978-10-03 Gennady Petrovich Koshelenko Axial-piston hydraulic machine
US4489642A (en) * 1983-01-13 1984-12-25 General Signal Corporation Method and apparatus for reducing operating noise in axial piston pumps and motors
US4934251A (en) * 1988-12-16 1990-06-19 Allied-Signal Inc. Hydraulic motor or pump with constant clamping force between rotor and port plate
US5727441A (en) * 1995-01-20 1998-03-17 Industrial Technology Research Institute Valve plate structure of an axial plunger pump
WO2006032548A1 (en) * 2004-09-22 2006-03-30 Robert Bosch Gmbh Reciprocating pump for delivering fluids
CN109356823A (en) * 2018-09-19 2019-02-19 杭州嘉凯医疗器械科技有限公司 A kind of medical inflation pump

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2728302A (en) * 1951-04-05 1955-12-27 Oilgear Co Reduction of shocks and noise in power pumps
US2737894A (en) * 1952-08-15 1956-03-13 Oilgear Co Axial type pump with stationary cylinders
US2847942A (en) * 1953-04-21 1958-08-19 American Brake Shoe Co Means of providing air purging in piston pump
DE1057844B (en) * 1953-08-13 1959-05-21 Rheinstahl Hanomag Ag Hydrostatic transmission
DE974089C (en) * 1955-02-10 1960-09-08 Daimler Benz Ag Hydraulic axial piston machine
DE1084539B (en) * 1955-03-29 1960-06-30 Friedrich Klopp Sen Hydrostatic transmission in radial piston design
DE1054300B (en) * 1955-03-29 1959-04-02 Friedrich Klopp Sen Hydrostatic transmission
DE1054327B (en) * 1956-08-11 1959-04-02 Georg Wiggermann Device for rotary valve controls for piston engines, especially for hydrostatic pumps or motors
DE1126735B (en) * 1957-01-09 1962-03-29 Mannesmann Meer Ag Pressure oil lubrication for bearing surfaces of axial piston pumps or gears, especially for their control plates
DE1058370B (en) * 1957-08-23 1959-05-27 Bosch Gmbh Robert hydraulic machine
DE1238333B (en) * 1958-06-10 1967-04-06 Ernest Edward Wagner Means for low-wear and dense presence of the control mirror plate on the flat Steuerflaeche the rotating cylinder drum of a displacement machine, in particular an axial or radial piston machine (pump or motor)
DE1195128B (en) * 1962-01-25 1965-06-16 Hydrel Ag Hydraulic drive with a device for damping vibrations
WO1995030833A1 (en) * 1994-05-06 1995-11-16 Caterpillar Inc. Hydraulic axial piston unit
CN1946519B (en) 2004-02-23 2010-12-08 华特麦尔工具集团公司 Parallel clamp and accessories therefor
CH711662A1 (en) * 2015-10-15 2017-04-28 Liebherr Machines Bulle Sa Manufacturing process for control plates of a hydraulic machine.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH44448A (en) * 1908-06-19 1909-08-02 Hector Clergue Francis Device for driving vehicles with the aid of a hydraulic fluid
CH226085A (en) * 1939-12-12 1943-03-15 Klopp Friedrich Fluid transmission with rotating cylinders, the pistons of which are moved back and forth by means of a swash plate.
US2288768A (en) * 1940-12-23 1942-07-07 Vickers Inc Power transmission

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1211943B (en) * 1957-01-18 1966-03-03 Bosch Gmbh Robert Device for noise reduction in a rotary valve-controlled hydraulic axial or radial piston machine that can be used as a pump or motor
DE1233267B (en) * 1959-08-21 1967-01-26 Citroen Sa Device for noise reduction in slide-controlled pumps and liquid motors
DE1228513B (en) * 1960-03-10 1966-11-10 Kloeckner Humboldt Deutz Ag Device for noise reduction in pressure fluid axial piston machines
US3200761A (en) * 1962-05-12 1965-08-17 Council Scient Ind Res Hydraulic positive displacement rotary machines
US3199461A (en) * 1963-05-27 1965-08-10 Cessna Aircraft Co Hydraulic pump or motor
US3457873A (en) * 1967-03-20 1969-07-29 Sperry Rand Corp Pumping chamber decompression
US3604314A (en) * 1968-05-06 1971-09-14 Mannesmann Meer Ag Hydrostatic axial piston machine
US3847057A (en) * 1971-04-16 1974-11-12 Bosch Gmbh Robert Precharging arrangement for a hydraulic displacement machine
US3956972A (en) * 1973-06-15 1976-05-18 Robert Cecil Clerk Axial piston pumps or motors
US3999466A (en) * 1973-06-30 1976-12-28 Eckhard Aschke Hydrostatic pump/motor unit
US4117770A (en) * 1976-05-13 1978-10-03 Gennady Petrovich Koshelenko Axial-piston hydraulic machine
US4489642A (en) * 1983-01-13 1984-12-25 General Signal Corporation Method and apparatus for reducing operating noise in axial piston pumps and motors
US4934251A (en) * 1988-12-16 1990-06-19 Allied-Signal Inc. Hydraulic motor or pump with constant clamping force between rotor and port plate
US5727441A (en) * 1995-01-20 1998-03-17 Industrial Technology Research Institute Valve plate structure of an axial plunger pump
WO2006032548A1 (en) * 2004-09-22 2006-03-30 Robert Bosch Gmbh Reciprocating pump for delivering fluids
CN109356823A (en) * 2018-09-19 2019-02-19 杭州嘉凯医疗器械科技有限公司 A kind of medical inflation pump
CN109356823B (en) * 2018-09-19 2019-09-13 杭州嘉凯医疗器械科技有限公司 A kind of medical inflation pump

Also Published As

Publication number Publication date
FR956823A (en) 1950-02-08
CH252204A (en) 1947-12-15
DE974232C (en) 1960-10-27

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