EP2943684A1 - Machine hydraulique comportant une chambre de pre-compression et un deuxieme angle d'inclinaison - Google Patents
Machine hydraulique comportant une chambre de pre-compression et un deuxieme angle d'inclinaisonInfo
- Publication number
- EP2943684A1 EP2943684A1 EP13820814.5A EP13820814A EP2943684A1 EP 2943684 A1 EP2943684 A1 EP 2943684A1 EP 13820814 A EP13820814 A EP 13820814A EP 2943684 A1 EP2943684 A1 EP 2943684A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic machine
- pressure
- plate
- cylinders
- low
- 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
- 238000007906 compression Methods 0.000 claims description 18
- 230000006835 compression Effects 0.000 claims description 17
- 230000005284 excitation Effects 0.000 description 12
- 239000012530 fluid Substances 0.000 description 9
- 238000004088 simulation Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 5
- 230000010349 pulsation Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-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
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
- F01B3/0055—Valve means, e.g. valve plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0032—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F01B3/0044—Component parts, details, e.g. valves, sealings, lubrication
- F01B3/007—Swash plate
-
- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0668—Swash or actuated plate
-
- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0678—Control
- F03C1/0686—Control by changing the inclination of the swash plate
-
- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0678—Control
- F03C1/0692—Control by changing the phase relationship between the actuated element and the distribution means, e.g. turning the valve plate; turning the swash plate
-
- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
-
- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/322—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by moving the swash plate in a direction perpendicular to the axis of rotation of the cylinder barrel
-
- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
- F04B1/30—Control of machines or pumps with rotary cylinder blocks
- F04B1/32—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
- F04B1/324—Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block by changing the inclination of the swash plate
Definitions
- the present invention claims the priority of the French application 1350122 filed January 08, 2013 whose content (text, drawings and claims) is here incorporated by reference.
- the present invention relates to a hydraulic machine comprising several pistons, and a motor vehicle equipped with such a hydraulic machine.
- a type of hydraulic barrel machine known comprises a motorized input shaft which rotates a barrel comprising a succession of parallel cylinders surrounding this axis, each cylinder comprising a piston bearing on one side called the front side, by a bearing forming an axial stop, on a tilting plate which is fixed in rotation.
- a rotation of the barrel gives each piston a movement in a complete cycle comprising a stroke in both directions, the height of which depends on the angle of inclination of the plate relative to a transverse plane, which is adjustable by a tilt control.
- the rear end of the cylinders, opposite to the tilting plate, is supported on a fixed circular plate which closes this end, to ensure a seal.
- the hydraulic machine can operate as a motor or pump.
- the circular stage comprises a low pressure collector which is opposite the cylinders comprising the piston which descends forwards in order to allow suction of the fluid to fill these cylinders, and a high pressure collector which is in front of the cylinders having the pistons that rise, in order to receive the fluid under pressure.
- the pre-compression chambers perform a smoothing of the pressure variation in the rolls to prepare the arrival on the next manifold, suitable for a wide range of pressure difference, but they do not bring everything to makes the pressure in this cylinder at a level of equilibrium with that of the manifold. It remains at the end a small brutal jump of final pressure that generates a pulsation on the hydraulic machine, transmitted to the low or high pressure circuit connected to it. We then have vibrations and noises that can be unpleasant, especially in a motor vehicle.
- the present invention is intended to avoid these disadvantages of the prior art.
- a hydraulic machine comprising a barrel rotated by an input shaft, comprising cylinders each receiving a piston resting on one side on a tilting plate which can rotate about a perpendicular axis to the input shaft, the cylinders being supported on the opposite side of the plate, on a circular closure plate comprising a low pressure manifold and a high pressure manifold separated at their ends by two intermediate spaces, at least one of these spaces comprising at least one connection to a pre-compression chamber, characterized in that the inclination of the plate comprises a second angle of inclination which gives an angular offset of the low and high dead points of the pistons, relative to the midpoints of the interspaces .
- An advantage of this hydraulic machine is that by performing for a rise in pressure in a cylinder before opening to the high pressure manifold, a combination of the progressiveness of the pressurization by the pre-compression chamber, with an optimized adjustment of the inclination of the plate at the second angle, giving a smoothing of the final pressure jump that can be adjusted by this adjustment according to the operating parameters, a high attenuation of the pulsation is then obtained.
- the hydraulic machine according to the invention may further comprise one or more of the following features, which may be combined with each other.
- the low and high dead points of the pistons are in the direction of rotation, in advance relative to the midpoints between the collectors.
- the angular offset is less than about 4 °.
- the angular offset may be between 1 and 2 °.
- the invention also relates to a motor vehicle having a traction chain comprising a hydraulic machine comprising any one of the preceding features.
- the vehicle may be of the hybrid type, comprising a heat engine that can be connected to the hydraulic machine.
- FIG. 1 is a view in axial section of a hydraulic machine with axial pistons
- FIG. 2 is a developed diagram of the cylinders of this machine comprising pre-compression chambers, and having no second angle of inclination of the plate, according to the prior art;
- FIG. 3 is a developed diagram of the cylinders of this machine, comprising pre-compression chambers and a second angle of inclination of the plate according to the invention
- FIG. 4 presents a graph of a pressure cycle in a cylinder and the resulting excitation levels for a hydraulic machine according to the prior art, not including a pre-compression chamber and a second angle inclination;
- FIG. 5 presents the same data for a hydraulic machine according to the prior art, comprising only pre-compression chambers;
- Figure 6 shows the same data for a hydraulic machine according to the prior art, comprising only a second angle of inclination
- Figure 7 shows the same data for a hydraulic machine according to the invention, comprising precompression chambers and a second inclination angle of the plate.
- Figure 1 shows a hydraulic machine 1 rotatable in both directions of rotation, comprising a generally cylindrical body 2 closed on the rear side by a cover 4.
- the body 2 and the cover 4 each support a tapered roller bearing 8 , which guides an input shaft 6 disposed along the axis of this body.
- a barrel 12 rotatably connected to the input shaft 6, comprises nine cylinders 14 arranged parallel to the axis, which are regularly distributed around this axis.
- Each cylinder 14 contains a piston 16, whose front end is supported by an axial stop 18 on a tilting plate 20 which can pivot about an axis O perpendicular to the input shaft 6, under the effect of a hydraulic control cylinder 22 and a return spring 26.
- the rear side of the cylinder 12 is supported on a transverse circular plate 24 held by the cover 4, to close the rear end of the cylinders 14.
- the plate 24 comprises a low pressure collector and a high pressure collector each forming an arc of a circle covering a little less than half of the positions of the cylinders 14.
- the collectors are separated from each other at their ends by two intermediate spaces which allow one cylinder to leave one of the manifolds completely before arriving on the other, so as to avoid direct communication between these collectors.
- FIG. 2 shows a developed view of all the cylinders 14, including the pistons 16 which follow a sinusoidal movement imposed by the inclination of the plate 20, during the rotation of the barrel 12 represented by the arrow facing the right.
- the rear cover 4 and the plate comprise starting from the left side, the low pressure collector 30 which is in communication with the first three cylinders 14, then after a first intermediate space the high pressure collector 32 which is in communication with the four subsequent cylinders, then the second intermediate space, and finally again the low pressure collector 30 which is in communication with the last two cylinders.
- the bottom and top dead centers of the pistons, positioned by the inclined plate 20, are for each exactly at the midpoint between the two collectors 30, 32.
- the plateau tilt 20 does not have a second inclination angle.
- the first intermediate space comprises a small hole forming a connection 36 to a high pressure pre-compression chamber 34, and in the same manner the second intermediate space also comprises a small hole forming a connection 40 to a low precompression chamber pressure 38.
- the position of each connection 36, 40 of a precompression chamber 34, 38, with respect to the collector 30, 32 located after, is particularly studied so as to achieve an adjustment of the pressure of the cylinder 14 just before qu It arrives in front of this manifold, in order to prepare the opening towards this manifold avoiding a high pressure difference causing a shock in the machine as well as in the hydraulic circuits.
- FIG. 3 shows the same hydraulic machine comprising, by construction, an adjustment giving a second angle of inclination of the plate, along an axis of second angle which is perpendicular to the axis of the input shaft as well as to first axis of inclination.
- This second angle of the plate gives in practice an advance of the displacement curve of the pistons 16 relative to the collectors 30, 32 which are fixed.
- the pressure characteristics in the cylinder 14 which arrives on a collector are then different, they can in particular be adapted precisely to improve the progressivity of the pressure variation in this cylinder when opening to the manifold, to reduce vibration and noise.
- the angular offset a does not exceed 4 °, a value between 1 and 2 ° is generally sufficient to obtain a good result.
- Each of the following figures 4 to 7 comprises for a type of hydraulic machine, on the left side a diagram showing as a function of time expressed in seconds, the simulation of the pressure expressed in bar in a cylinder 14 during a cycle full.
- the progressivity of the rise in pressure in the cylinder, presented between the two vertical lines, is an important parameter of the excitation generated by the hydraulic machine.
- the simulations of the pressure are carried out for rotational speeds of the hydraulic machine which may be different according to the figures, which gives different cycle times.
- the right side of these figures shows for the same machine a ratio of the vibratory excitation level as a function of the frequency of pulsation expressed in Hertz, comprising at the top the measurement on the high pressure manifold 32, and at the bottom the measurement on the low-pressure collector 30.
- a ratio of the vibratory excitation level as a function of the frequency of pulsation expressed in Hertz, comprising at the top the measurement on the high pressure manifold 32, and at the bottom the measurement on the low-pressure collector 30.
- Figure 4 shows simulations performed on a hydraulic machine having no pre-compression chamber, and no second pivot angle of the plate.
- Figure 5 shows simulations performed on a hydraulic machine having pre-compression chambers, and no second pivot angle of the plate.
- Figure 6 shows simulations performed on a hydraulic machine having no pre-compression chamber, but a second pivot angle of the plate that has been set for the operating characteristics of this machine.
- Figure 7 shows simulations performed on a hydraulic machine comprising a pre-compression chamber and a second pivot angle of the plate.
- the succession of operations comprises first placing the pre-compression chamber in communication with the cylinder to obtain a gradual rise in pressure over a large part of the pressure range, and then thereafter. supply of the second angle of inclination of the plate to complete this rise in pressure.
- the position of the connections of the pre-compression chamber relative to the manifold is particularly important to obtain the gradual rise in pressure, as well as the proper operation of the second inclination angle of the plate.
- the optimal position of the connections can advantageously be studied by simulations, as a function of the speed range and the pressure range used for the operation of the hydraulic machine.
- the hydraulic machine according to the invention is particularly suitable for applications on motor vehicles, including significant constraints on the level of comfort, the total weight and costs. It can be used in particular for a hybrid vehicle comprising a heat engine that can be connected to this machine, in order to achieve a hydraulic energy storage under pressure in tanks for the return of this energy, to optimize the operation of the engine .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Press Drives And Press Lines (AREA)
- Hydraulic Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1350122A FR3000768B1 (fr) | 2013-01-08 | 2013-01-08 | Machine hydraulique comportant une chambre de pre-compression et un deuxieme angle d'inclinaison |
PCT/FR2013/053135 WO2014108616A1 (fr) | 2013-01-08 | 2013-12-17 | Machine hydraulique comportant une chambre de pre-compression et un deuxieme angle d'inclinaison |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2943684A1 true EP2943684A1 (fr) | 2015-11-18 |
EP2943684B1 EP2943684B1 (fr) | 2016-10-05 |
Family
ID=47989231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13820814.5A Active EP2943684B1 (fr) | 2013-01-08 | 2013-12-17 | Machine hydraulique comportant une chambre de pre-compression et un deuxieme angle d'inclinaison |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2943684B1 (fr) |
CN (1) | CN105074206B (fr) |
FR (1) | FR3000768B1 (fr) |
WO (1) | WO2014108616A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3037184B1 (fr) * | 2015-06-05 | 2017-07-07 | Technoboost | Procede de calcul de la position angulaire d’une machine hydraulique pour reduire les emissions sonores |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1211943B (de) * | 1957-01-18 | 1966-03-03 | Bosch Gmbh Robert | Einrichtung zur Geraeuschminderung bei einer als Pumpe oder Motor verwendbaren, drehschiebergesteuerten hydraulischen Axial- oder Radialkolbenmaschine |
DE1129828B (de) * | 1959-09-18 | 1962-05-17 | Citroen Sa | Hochdruck-Axialkolbenpumpe mit umlaufender Zylindertrommel und verschwenkbarer Schiefscheibe |
US3199461A (en) * | 1963-05-27 | 1965-08-10 | Cessna Aircraft Co | Hydraulic pump or motor |
US3283726A (en) * | 1964-12-14 | 1966-11-08 | American Brake Shoe Co | Construction for pump/motor devices |
DE19706114C9 (de) | 1997-02-17 | 2014-02-06 | Linde Hydraulics Gmbh & Co. Kg | Vorrichtung zur Pulsationsverminderung an einer hydrostatischen Verdrängereinheit |
DE102006021570A1 (de) * | 2006-04-10 | 2007-10-18 | Robert Bosch Gmbh | Hydrostatische Kolbenmaschine mit drehbarer Steuerscheibe |
DE102010038651A1 (de) * | 2010-07-29 | 2012-02-02 | Robert Bosch Gmbh | Axialkolbenmaschine mit verstellbarer Schwenkscheibe |
-
2013
- 2013-01-08 FR FR1350122A patent/FR3000768B1/fr not_active Expired - Fee Related
- 2013-12-17 WO PCT/FR2013/053135 patent/WO2014108616A1/fr active Application Filing
- 2013-12-17 EP EP13820814.5A patent/EP2943684B1/fr active Active
- 2013-12-17 CN CN201380069907.7A patent/CN105074206B/zh not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2014108616A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105074206A (zh) | 2015-11-18 |
CN105074206B (zh) | 2017-05-24 |
EP2943684B1 (fr) | 2016-10-05 |
WO2014108616A1 (fr) | 2014-07-17 |
FR3000768A1 (fr) | 2014-07-11 |
FR3000768B1 (fr) | 2016-07-15 |
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