WO2017009659A1 - Pompes et moteurs à pistons radiaux - Google Patents

Pompes et moteurs à pistons radiaux Download PDF

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Publication number
WO2017009659A1
WO2017009659A1 PCT/GB2016/052150 GB2016052150W WO2017009659A1 WO 2017009659 A1 WO2017009659 A1 WO 2017009659A1 GB 2016052150 W GB2016052150 W GB 2016052150W WO 2017009659 A1 WO2017009659 A1 WO 2017009659A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cam surface
pump
housing
cam
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.)
Ceased
Application number
PCT/GB2016/052150
Other languages
English (en)
Inventor
Andrew John Collins
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.)
Blagdon Actuation Research Ltd
Original Assignee
Blagdon Actuation Research Ltd
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 Blagdon Actuation Research Ltd filed Critical Blagdon Actuation Research Ltd
Priority to US15/744,894 priority Critical patent/US20180202421A1/en
Priority to EP16750480.2A priority patent/EP3322896A1/fr
Publication of WO2017009659A1 publication Critical patent/WO2017009659A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • F04B49/123—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 by changing the eccentricity of one element relative to another element
    • F04B49/125—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 by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts
    • 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
    • F04B1/0413—Cams
    • 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
    • F04B1/0421—Cylinders
    • 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
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0456—Cylindrical
    • 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
    • F04B1/047—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/0472—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders with cam-actuated distribution 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
    • 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
    • F04B1/06—Control
    • F04B1/066—Control by changing the phase relationship between the actuating cam and the distributing means
    • 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
    • F04B1/06—Control
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
    • 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
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • 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
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F04B1/1074—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks with two or more serially arranged radial piston-cylinder units
    • F04B1/1077—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks with two or more serially arranged radial piston-cylinder units located side-by-side
    • 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
    • F04B49/002—Hydraulic systems to change the pump delivery
    • 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
    • F04B49/20—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 changing the driving speed
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0409—Cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0415—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/0403—Details, component parts specially adapted of such engines
    • F03C1/0435—Particularities relating to the distribution members
    • F03C1/0438—Particularities relating to the distribution members to cylindrical distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
    • F03C1/0472—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with cam-actuated distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
    • F03C1/0474—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with two or more radial piston/cylinder units in series
    • F03C1/0476—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with two or more radial piston/cylinder units in series directly located side by side

Definitions

  • the present invention concerns radial piston pumps. More particularly, but not exclusively, this invention concerns internally impinged radial piston pumps.
  • This invention also concerns piston pumps having a rotor including an integrally formed piston housing and drive shaft.
  • This invention also concerns a variable displacement pump having a cam including a cam surface that varies across the width of the cam such that axial movement of the cam relative to the piston housing changes the motion of the piston.
  • This invention also concerns piston pumps having a primary roller arranged to follow a primary cam surface and a secondary roller arranged to follow a secondary cam surface.
  • This invention also concerns piston pumps produced using additive manufacturing processes, for example 3D printing. It will be appreciated that pumps in accordance with the present invention may also function as motors.
  • Radial piston pumps (and/or motors) are used in a wide variety of applications including automotive and aerospace applications.
  • radial piston pumps comprise a plurality of pistons mounted in radially extending piston chambers formed in a solid piston housing.
  • the piston housing may include a hollow centre with a shaft mounted eccentrically therein.
  • Movement of the pistons may be produced by rotating the piston housing relative to the shaft and/or ring.
  • An inside (or internally) impinged pump may be defined as a pump in which the fluid flows into the pistons via the interior of the pump housing.
  • An outside (or externally) impinged pump may be defined as a pump in which the fluid flows to and from the pistons via structure located around the exterior of the piston housing.
  • Fig. 1 Pumps in accordance with Fig. 1 often require hydrostatic lubrication (i.e. applying external pressure to a fluid film layer between two components) to maintain friction between the cam follower 10 and the cam surface 12 at acceptable levels.
  • hydrostatic lubrication i.e. applying external pressure to a fluid film layer between two components
  • the use of hydrostatic lubrication may lead to significant inefficiencies in the pump due to the need to provide a supply of pressurised fluid.
  • Fig. 1 Pumps in accordance with Fig. 1 also comprise a high number of individual components which may lead to wasted space (and therefore larger pumps) or additional cost due to, for example, more complex assembly.
  • the present invention seeks to mitigate the above-mentioned problems.
  • the present invention seeks to provide an improved pump.
  • a radial piston pump comprising a rotor, the rotor including a drive shaft arranged to transmit rotary motion to or from the pump and a piston housing including at least one piston chamber, the at least one piston chamber being arranged to receive a piston and wherein the drive shaft and the piston housing are integrally formed. Integrating several functions, for example the drive-shaft function and the piston-housing function into an integrally formed component may facilitate the design of more compact pumps. Additionally or alternatively, integrally forming the drive shaft and piston housing may reduce manufacture and/or assembly costs.
  • the pump may further comprise a main housing, the rotor being mounted for rotation relative to the main housing.
  • the main housing may comprise a first cam surface arranged to control the radial movement of a piston located in the at least one piston chamber when the pump is in use.
  • the main housing and the first cam surface may be integrally formed. Integrating the cam surface with the main housing of the pump may facilitate the design of more compact pumps and/or reduce manufacturing costs.
  • the pump may further comprise at least one flow gallery along which fluid can flow when the pump is in use.
  • the at least one flow gallery may be curvilinear.
  • the rotor may comprise at least one flow gallery, for example an integrally formed flow gallery, arranged to connect the at least one piston chamber to one of the ports of the first set.
  • the main housing may comprise at least one flow gallery, for example an integrally formed flow gallery, arranged to connect the at least one external port to one of the ports of the second set.
  • the rotor and/or the main housing may comprise a plurality of integrally formed flow galleries.
  • the position of the second piston may be fixed relative to the first piston.
  • the primary and/or secondary roller may comprise a roller bearing (also known as a rolling element bearing), for example a ball bearing, a cylindrical roller bearing or a needle roller bearing.
  • a roller bearing also known as a rolling element bearing
  • the surface of the roller that is adjacent to the cam surface may be the outer race of a roller bearing.
  • the first or second roller may comprise a member, for example a shaft, pin or caster, mounted on a roller bearing for rotation relative to the piston assembly.
  • the surface of the roller that is adjacent to the cam surface may be the outer surface of the member.
  • Varying the phase of the surface profile of the cam and the sequencing element may allow the relationship between the flow of fluid into and out of the piston chamber and the movement of the piston into and out of the piston chamber to be varied.
  • Providing a cam mounted for rotation about the first axis relative to the sequencing assembly may provide a mechanically simple and compact method of switching the direction of flow through the pump and/or increase the efficiency of the pump. For example, at high frequencies/speeds it may be
  • a method of manufacturing a radial piston pump comprising a drive shaft arranged to transmit rotary motion to or from the pump and a piston housing including at least one piston chamber, the piston chamber being arranged to receive a piston, the method comprising the step of forming a rotor including the drive shaft and the piston housing as a single piece using an additive manufacturing process.
  • Fig. 2 shows a cross-sectional schematic view of a pump 101 in accordance with a first example embodiment of the invention.
  • the pump 101 comprises a rotor 103 including an integrally formed drive shaft 105 and piston housing 102.
  • the piston housing 102 comprises a plurality of radially extending tube-like walls 102a that appear rectangular when viewed in cross-section in Fig. 2 and which project from the outer surface of the rotor 103.
  • Each cylindrical wall 102a is spaced apart from the other cylindrical walls 102a and defines a piston chamber 104 in which a piston 108 is received.
  • the piston chamber walls 102a (and the corresponding pistons 108) are arranged in two rows, each row extending around the circumference of the rotor 103.
  • the profile of the primary cam surface 1 12 varies periodically with a frequency of two.
  • the profile of the secondary cam surface 1 16 varies in a similar manner such that the radial distance between the primary cam surface 1 12 and secondary cam surface 1 16 remains substantially constant around the closed-loop cam surfaces.
  • rotation of the drive shaft 105 causes the piston housing 102 which is formed as a single piece with the drive shaft 105 to rotate.
  • Roller bearing 1 10 and pin 1 14 each follow the corresponding cam surface 1 10, 1 16 as the piston housing 102 moves relative to the main housing 122.
  • the radius of the inward-facing cam surface 1 12 decreases and the piston is pushed into the piston chamber 104 expelling the liquid located therein through flow gallery 1 18 to port 120.
  • the radius of the primary cam surface 1 12 increases and so does the radius of the secondary cam surface 1 16.
  • the rotor 103 including piston housing 102 and drive shaft 105 is made as a single part in steel using an additive manufacturing process.
  • the main housing 122 including piston housing 102, cylindrical projection 124, primary cam surface 112 and a secondary cam surface 116 is also made as a single part using an additive manufacturing process.
  • the piston 108 is made using an additive manufacturing process. Once the rotor 103 and main housing 122 have been formed using additive manufacturing, subtractive manufacturing techniques are used to finish the components.

Landscapes

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

Abstract

Cette invention concerne une pompe à pistons radiaux (101) comprenant un rotor (103). Le rotor (103) comprend un arbre d'entraînement (105) agencé pour transmettre un mouvement de rotation vers ou à partir de la pompe (101) et un boîtier de piston (102) comprenant au moins une chambre de piston (104), ladite/lesdites chambre(s) de piston (104) étant agencé(es) pour recevoir un piston (108). L'arbre d'entraînement (105) et le boîtier de piston (102) sont formés d'un seul tenant.
PCT/GB2016/052150 2015-07-16 2016-07-15 Pompes et moteurs à pistons radiaux Ceased WO2017009659A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/744,894 US20180202421A1 (en) 2015-07-16 2016-07-15 Radial piston pumps and motors
EP16750480.2A EP3322896A1 (fr) 2015-07-16 2016-07-15 Pompes et moteurs à pistons radiaux

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1512473.8 2015-07-16
GBGB1512473.8A GB201512473D0 (en) 2015-07-16 2015-07-16 Radial piston pumps and motors

Publications (1)

Publication Number Publication Date
WO2017009659A1 true WO2017009659A1 (fr) 2017-01-19

Family

ID=54014069

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2016/052150 Ceased WO2017009659A1 (fr) 2015-07-16 2016-07-15 Pompes et moteurs à pistons radiaux

Country Status (4)

Country Link
US (1) US20180202421A1 (fr)
EP (1) EP3322896A1 (fr)
GB (1) GB201512473D0 (fr)
WO (1) WO2017009659A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019120887A1 (fr) * 2017-12-21 2019-06-27 Robert Bosch Gmbh Pompe pour délivrer un carburant à haute pression à un moteur à combustion interne
IT201800011075A1 (it) * 2018-12-13 2020-06-13 Bosch Gmbh Robert Metodo per la produzione di almeno un componente di un gruppo di pompaggio
WO2021160005A1 (fr) * 2020-02-16 2021-08-19 杨健 Moteur hydraulique fixe de corps de cylindre
EP4242459A3 (fr) * 2018-09-06 2023-12-13 Cytiva Sweden AB Pompe à fluide radial

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10458468B2 (en) 2018-01-16 2019-10-29 Roller Bearing Company Of America, Inc. Cam follower for high axial load applications
CN109826790B (zh) * 2019-02-27 2020-07-07 安徽理工大学 一种可变量双作用径向柱塞泵
CN110360075A (zh) * 2019-08-15 2019-10-22 南昌谱瑞斯天泵业有限公司 一种径向多列立式活塞泵
CN116601386B (zh) 2020-12-16 2025-05-06 丹佛斯有限公司 静液压径向柱塞机
JP2024516880A (ja) * 2021-05-06 2024-04-17 ドミン フルード パワー リミテッド ラジアルピストンポンプ
EP4102051A1 (fr) * 2021-06-07 2022-12-14 Robert Bosch GmbH Machine à pistons multiples comportant au moins trois volumes de déplacement commutables

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US3875851A (en) * 1971-11-09 1975-04-08 Renold Ltd Hydraulic motors
US4522110A (en) * 1982-09-08 1985-06-11 Ab Hagglund & Soner Hydraulic radial piston motor
EP0099372B1 (fr) * 1982-01-19 1989-12-20 Unipat Ag Machines hydrauliques a pistons radiaux

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FR796163A (fr) * 1935-10-10 1936-03-31 D App De Transmission Perfectionnements apportés aux appareils hydrauliques
US3875851A (en) * 1971-11-09 1975-04-08 Renold Ltd Hydraulic motors
EP0099372B1 (fr) * 1982-01-19 1989-12-20 Unipat Ag Machines hydrauliques a pistons radiaux
US4522110A (en) * 1982-09-08 1985-06-11 Ab Hagglund & Soner Hydraulic radial piston motor

Cited By (6)

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Publication number Priority date Publication date Assignee Title
WO2019120887A1 (fr) * 2017-12-21 2019-06-27 Robert Bosch Gmbh Pompe pour délivrer un carburant à haute pression à un moteur à combustion interne
EP4242459A3 (fr) * 2018-09-06 2023-12-13 Cytiva Sweden AB Pompe à fluide radial
US12352252B2 (en) 2018-09-06 2025-07-08 Cytiva Sweden Ab Multiple cavity reciprocating positive displacement fluid pump
IT201800011075A1 (it) * 2018-12-13 2020-06-13 Bosch Gmbh Robert Metodo per la produzione di almeno un componente di un gruppo di pompaggio
WO2020120732A1 (fr) * 2018-12-13 2020-06-18 Robert Bosch Gmbh Procédé pour générer au moins un élément d'un groupe motopompe
WO2021160005A1 (fr) * 2020-02-16 2021-08-19 杨健 Moteur hydraulique fixe de corps de cylindre

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GB201512473D0 (en) 2015-08-19
EP3322896A1 (fr) 2018-05-23

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