WO2010025729A1 - Machine à pistons axiaux et dispositif d'osmose inverse - Google Patents

Machine à pistons axiaux et dispositif d'osmose inverse Download PDF

Info

Publication number
WO2010025729A1
WO2010025729A1 PCT/DK2009/000199 DK2009000199W WO2010025729A1 WO 2010025729 A1 WO2010025729 A1 WO 2010025729A1 DK 2009000199 W DK2009000199 W DK 2009000199W WO 2010025729 A1 WO2010025729 A1 WO 2010025729A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
axial piston
piston machine
cylinder drum
pump
Prior art date
Application number
PCT/DK2009/000199
Other languages
German (de)
English (en)
Inventor
Asger Meng Larsen
Ove Thorbøl HANSEN
Palle Olsen
Original Assignee
Danfoss A/S
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 Danfoss A/S filed Critical Danfoss A/S
Publication of WO2010025729A1 publication Critical patent/WO2010025729A1/fr

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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/06—Energy recovery
    • 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
    • F04B1/20—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
    • F04B1/2042—Valves
    • 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
    • F04B1/303—Control of machines or pumps with rotary cylinder blocks by turning the valve 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
    • F04B1/306—Control of machines or pumps with rotary cylinder blocks by turning the swash plate, e.g. with fixed inclination
    • 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
    • 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
    • F04B9/109—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 plural pumping chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/24—Specific pressurizing or depressurizing means
    • B01D2313/243—Pumps

Definitions

  • the invention relates to an axial piston machine with a cylinder drum having at least two cylinders, a piston in each cylinder, which bears with a sliding surface on a swash plate, a valve assembly having a stationary connection element and a cylinder drum with the rotating valve element, wherein the Connection element has a pump inlet connected to an inlet port and a pump outlet port connected to a high-pressure port.
  • the invention relates to a reverse osmosis device having a pump and a membrane unit, which has a membrane, an inlet and a concentrate outlet on one side of the membrane and a permeate outlet on the other side of the membrane.
  • An axial piston machine of the type mentioned is known for example from DE 102 23 844 A1.
  • the shoes are usually held by a hold-down in contact with the swash plate.
  • the sliding shoes are moved upwards parallel to the axis of the cylinder drum on one half of the swash plate, so that the piston reduces a volume in the cylinder formed in the cylinder drum and moves downwards in the other half of the swash plate, so that he increases the volume again.
  • the piston thus performs a pressure stroke in the first half of the swash plate and a suction stroke in the other half of the swash plate.
  • the pump inlet opening and the pump outlet opening are expediently designed kidney-shaped, so that they can be swept by an opening in the valve element designed as a valve element, when the cylinder drum rotates. If such an axial piston machine is used as a pump in conjunction with a reverse osmosis device, then the high-pressure port is connected to the inlet of the membrane unit.
  • Water to be purified which is supplied to the membrane unit, then stands at an elevated pressure on one side of the membrane. Part of this water passes through the membrane and can be removed as permeate on the other side of the membrane.
  • the concentration in the water increases, so that here a concentrate forms. This concentrate is still under increased pressure.
  • the invention has for its object to be able to operate a reverse osmosis device as economically as possible.
  • Such axial piston machine then works, so to speak, at the same time as a pump and as a motor.
  • the drive power of the engine is not sufficient to provide the pump power available, so that an additional drive for the cylinder drum is required.
  • this can be done by the membrane unit of the reverse osmosis device use backflowing concentrate to power the machine.
  • the concentrate flowing back from the membrane unit thus acts to drive a piston, while another piston provides the pumping power.
  • the concentrate is not fed into the cylinder over the entire "suction stroke" of the piston, but only over the predetermined first rotation angle range, so that liquid can be supplied via the inlet port over the remainder of the "suction stroke".
  • the motor inlet opening is arranged in the direction of rotation of the cylinder drum between the pump outlet opening and the pump inlet opening. This ensures that fresh liquid from the inlet connection, which is last fed in, is first returned to the high-pressure connection, as in the case of a subsequent pressure stroke of the piston.
  • a valve device which releases an outlet channel from the cylinder over a predetermined second rotation angle range of the cylinder drum. This makes it possible to at least largely remove the concentrate that has been used previously for driving the cylinder drum from the cylinder and replaced by fresh liquid. The operation of the membrane unit of the reverse osmosis device is therefore not disturbed by increasing the concentration in the concentrate beyond predetermined limits.
  • the outlet channel opens into the cylinder at a predetermined axial distance from the valve arrangement. If the outlet channel is released, one can then generate a flow, ie the incoming fresh liquid can then drive the concentrate previously used to drive the cylinder drum out of the outlet channel.
  • a duty cycle of a cylinder looks like this: when the piston has reached the lowest point of the swash plate, it is moved in a further rotation of the cylinder drum to the valve assembly and displaces liquid from the cylinder into the pump outlet opening. From there, the liquid reaches the entrance of the membrane unit.
  • the concentrate flowing back from the membrane unit which is still under a relatively high pressure, which is only slightly smaller than the pressure at the pump outlet opening, then acts on the piston when the piston has exceeded the highest point of the swash plate and again moved away from the valve assembly.
  • the concentrate provides a part of the drive power, because the piston acted upon by a pressure from the valve arrangement generates a drive torque on the cylinder drum via the lo swash plate.
  • valve means opens the outlet channel so that upon further movement of the piston away from the valve assembly, the increase in volume is now replenished by fresh fluid which is later circulated through the membrane unit.
  • the valve device has a discharge opening in the swash plate, which lies opposite the pump inlet opening, and the outlet channel passes through the sliding surface.
  • valve assembly is in communication with the pump inlet opening, then it is connected through the piston with the discharge opening in the swash plate, so that the concentrate through the piston, ie through the outlet channel, can flow. You can then feed more fresh water into the cylinder, as it in and of itself
  • the outflow opening is arranged congruent to the pump inlet opening. The more accurate the mapping between the drain port and the pump inlet port, the better the filling of the cylinder with fresh water.
  • the valve device has a pin projecting into the cylinder drum, which covers the outlet channel formed in the cylinder drum or releases it in the predetermined second rotational angle range of the cylinder drum.
  • the valve device comprises a stationary element, namely the pin, and a rotating element, namely the cylinder drum. Due to the rotation of the cylinder drum, the outlet channel is then automatically released in the predetermined second rotation angle range of the cylinder drum and otherwise locked.
  • valve device has a pin connected to the cylinder drum, which protrudes into the swash plate.
  • valve function will be arranged for example in the swash plate.
  • valve device has a sealing wall which bears against the outside of the cylinder drum and covers the outlet channel or releases it in the predetermined second rotation angle range of the cylinder drum.
  • valve device has a stationary element, namely the sealing wall and a rotating element, namely the cylinder drum. Due to the rotation of the cylinder drum, the outlet channel is released or locked in the correct position.
  • the outlet channel extends radially.
  • the outlet channel can be made relatively easily.
  • the term "radial" is not to be understood in a mathematically rigorous sense.
  • the exhaust duct needs only from radially inside run radially outward. So it can also have an angle not equal to 90 ° to the axis of rotation of the cylinder drum and does not even have to cut this axis of rotation.
  • connection element projects into the cylinder drum.
  • connection geometry i. during the supply and removal of the liquid in the various pressure stages.
  • the low-pressure connection is preceded by a feed pump.
  • the feed pump does not need to generate much pressure. It merely serves to displace the concentrate from the cylinder as far as necessary. For this purpose, a comparatively low pressure suffices.
  • the engine inlet port is connected via a throttle with a low pressure region. It is difficult, in particular with changing quantities of permeate consumption at the membrane unit, to set the return flow of the concentrate correctly. Theoretically, as much concentrate should get to the engine intake port as the volume of the cylinder increases as the piston moves as the cylinder passes over the engine intake port. Through the throttle you can then ensure that an excess of concentrate can flow into the low pressure range. Nevertheless, the drive power of the concentrate is maintained.
  • the swash plate has a variable angle.
  • the angle is changed, so does the stroke of the piston in the cylinder and thus the volume that is released or displaced with each stroke of the piston in the cylinder.
  • This also makes it possible to adapt to the refluxing concentrate.
  • a control device for changing the angle is provided, wherein the control device is connected to a sensor.
  • the sensor can, for example, measure the permeate consumption at the membrane unit or the salt or dirt concentration on the concentrate side of the membrane.
  • the object is achieved in a reverse osmosis device of the type mentioned above in that the pump is formed as described above, wherein the pump outlet is connected to the input and the motor inlet opening to the concentrate outlet.
  • a difference in length between the pump outlet opening and the motor inlet opening in the direction of rotation is adapted to the membrane. If one proceeds from a steady state operation in which a constant amount of permeate is always taken from the permeate outlet, then one can easily calculate what the difference between the volume that promotes the piston in the cylinder in a pressure stroke, and Volume that can still flow back from the permeate outlet of the membrane. If, for example, 25% of the fresh water is taken off as permeate, then only 75% can flow off again through the concentrate outlet. Accordingly, in this case it would be sufficient to dimension the motor inlet opening so that the piston is acted upon over 75% of the piston movement from the concentrate outlet.
  • the membrane unit has a consumption sensor which is coupled to an adjusting device. In this case, even with changing consumption volumes, it is possible to ensure that the cylinder is filled but not overfilled when the piston in the cylinder starts to move.
  • the adjusting device it is preferable for the adjusting device to act on a throttle which connects the motor inlet opening to a low-pressure region. Excess concentrate can then flow through the throttle to the low pressure area, where you can set the throttle so that the necessary to operate the cylinder drum pressure is maintained.
  • a throttle which connects the motor inlet opening to a low-pressure region. Excess concentrate can then flow through the throttle to the low pressure area, where you can set the throttle so that the necessary to operate the cylinder drum pressure is maintained.
  • an adjustable throttle and a valve can be viewed, which can be opened or closed by the adjustment.
  • the adjusting device acts on the angle of inclination of the swashplate.
  • the stroke height of the piston in the cylinder is changed, so that one can thereby also influence the working volume in the cylinder, which is released by the piston or which is displaced.
  • FIG. 1 is a schematic representation of a reverse osmosis device
  • connection plate 3 is a perspective view of a connection plate
  • valve plate 4 is a perspective view of a valve plate
  • 5 is a schematic representation of a swash plate with piston and shoe
  • Fig. 6 is an illustration for explaining the operation of a
  • FIG. 7 is a modified embodiment of FIG. 6,
  • Fig. 8 shows a further embodiment of an axial piston machine in a schematic representation
  • Fig. 9 shows a further embodiment of an axial piston machine in a schematic representation.
  • FIG. 1 shows a reverse osmosis device 1 with a membrane unit 2, which has a membrane 3.
  • the membrane unit has an inlet 4 and a concentrate outlet 5 on one side of the membrane 3.
  • a permeate outlet 6 is arranged, can be removed at the purified water.
  • saline water is to be desalinated with the aid of the membrane unit 2, which is removed from a supply 7.
  • the desalinated water is released at the permeate outlet 6.
  • Water with a higher salt concentration is released at the concentrate outlet 5.
  • the reverse osmosis device 1 is not limited to use in connection with salt water.
  • Other liquids, especially water, which are provided with other loads can be cleaned with the reverse osmosis device 1 accordingly.
  • Reverse osmosis requires increased salt water pressure. This increased pressure is generated by an axial piston machine 8, which will be described in more detail in connection with FIGS. 2 to 5.
  • the axial piston machine 8 acts here mainly as a pump. It is driven by a motor 9 shown schematically, for example, an electric motor or an internal combustion engine.
  • a feed pump 10 may be connected upstream of the axial piston machine in order to produce a sufficient filling of the axial piston machine 8, as will be explained below.
  • the concentrate which is present at the concentrate outlet 5, has an elevated pressure which is only a few bar below the pressure at the high-pressure connection 11 of the axial piston machine 8.
  • the concentrate outlet 5 of the membrane unit 2 is connected to a high-pressure return connection 12 of the axial piston machine 8 via a line 13.
  • a branch line 14 can branch off, in which a throttle 15 is arranged.
  • the throttle 15 may be adjustable.
  • a sensor 16 may be provided at the permeate outlet 6 of the membrane unit 2, which adjusts the throttle 15 as a function of the outflow quantity of the permeate.
  • the throttle 15 may also be formed by a valve which is alternately opened and closed, for example.
  • the axial piston machine 8 also has an outflow connection 37, which is connected to a low-pressure region, for example the supply 7.
  • the axial piston machine 8 will be explained in more detail in connection with FIGS. 2 to 5. It is largely constructed in the manner of a conventional axial piston machine, ie it has a housing 17 in which a cylinder drum 18 is rotatably mounted. In the cylinder drum 18 at least one cylinder 19 is arranged, whose axis is parallel to the Axle of the cylinder drum 18 extends. In the cylinder 19, a piston 20 is arranged, which is movable in the direction of a double arrow 21 back and forth.
  • the piston 20 is supported by a sliding shoe 22 on a swash plate 23.
  • a hold-down 24 holds the shoe 22 with its sliding surface 25 in abutment against the swash plate 23.
  • the cylinder barrel 18 is connected to a valve plate 26.
  • each cylinder 19 is provided with a bushing 27 which is inserted in the valve plate 26.
  • These sockets 27 do not necessarily have to be present.
  • Such axial piston machines can have many different designs.
  • the valve plate 26 has a control port 28 for each cylinder 19.
  • valve plate 26 bears against a connection plate 29, which is shown in greater detail in FIG.
  • connection plate 29 has three control openings, which are also referred to as "control" because they have an arcuate course.
  • control because they have an arcuate course.
  • the connection plate 29 has a pump inlet opening 30 and a pump outlet opening 31, as is known from conventional axial piston machines.
  • an engine intake port 32 is provided in the rotational direction of the cylinder barrel 18 between the pump outlet port 31 and the pump inlet port 30.
  • the pump outlet port 31 communicates with the high-pressure port 11.
  • the engine intake port 32 communicates with the high-pressure return port 12.
  • the pump inlet port 30 communicates with an inlet port 33 of the axial piston engine.
  • the swash plate 23 is shown with a piston 20 and the associated shoe 22. It can be seen that in the swash plate 23, a drain opening 34 is provided.
  • the piston 20 is, as can be seen from Fig. 2, hollow. It has an outlet channel 35, which passes through the sliding surface 25 and communicates with the hollow interior 36. Accordingly, when the piston 20 overflows the drainage port 34, liquid may flow out of the cylinder 19 through the drainage port 34.
  • the discharge opening 34 is connected to the discharge connection 37 of the axial piston machine 8.
  • the drainage opening 34 is positioned so that it coincides angularly with the pump inlet opening 30.
  • salt water supplied to the input port 33 of the axial piston engine 8 displaces the fluid previously contained in the cylinder 19 through the drain port 37 into a low pressure region such as reservoir 7.
  • FIG. 6 Shown is a piston 20 in nine different positions a-i, these positions being represented by the position of the associated cylinder 19 associated control port 28 with respect to the pump inlet port 30, the pump outlet port 31 and the engine inlet port 32.
  • the cylinder drum 18 rotates counterclockwise with respect to FIG. 6.
  • the piston 20 with its control opening 28 reaches the beginning of the pump outlet opening 31 (a), it is in its bottom dead center, ie the associated cylinder 19 is filled with the largest possible amount of salt water.
  • the piston 20 is turned up and displaces the cylinder 19 located amount of salt water through the pump outlet 31 and the high pressure port 11 to the inlet 4 of the membrane unit 2.
  • the salt water passes partly through the membrane 3 and can be removed via the permeate 6.
  • Concentrate 5 is still at relatively high pressure at concentrate exit 5.
  • This concentrate is supplied to the engine intake port 32 via the high-pressure return port 12.
  • This concentrate pushes the piston 19 (f, g) down the swash plate 23, by cooperating sliding shoe 22 and swash plate 23 of the piston, which coincides with the motor inlet port 32 stands, works by motor, ie it generates a driving torque on the cylinder drum 18.
  • This allows one to partially convert the energy of the concentrate into a rotational energy, in other words to recover part of the energy.
  • the length of the engine inlet opening 32 may be selected so that it is adapted to the consumption of permeate.
  • the length of the engine intake port 32 in the direction of rotation of the cylinder drum 18 may be dimensioned to provide the cylinder with concentrate over 75% of the length of the piston movement.
  • FIG. 7 shows an embodiment modified from FIG. 6, in which the line 13 between the concentrate outlet 5 and the high pressure return line running connection 12, the line 14 branches off with the throttle 15.
  • the throttle 15 ensures that concentrate is always present in the engine inlet opening 32 with a sufficient pressure, but too much concentrate can flow off via the branch line 14.
  • An alternative, not shown, is to change the inclination of the swash plate 23 to adjust the stroke of the piston 20 to the amount of the refluxing concentrate.
  • FIG. 8 shows a further embodiment of an axial piston machine 8. Elements which correspond to those of Figures 1 to 7 are provided with the same reference numerals. 8a shows a schematic section through the axial piston machine 8, FIG. 8b shows a plan view of the valve plate 29 and FIG. 8c shows a section A-A according to FIG. 8a.
  • a valve device is also provided here with a stationary element and a rotating element.
  • the stationary element is formed by a pin 38.
  • the movable element is formed by the cylinder drum 18.
  • the pin 38 is arranged in a central bore 39 in the cylinder drum 18 and lies with its peripheral wall 40 sealingly against the wall of the bore 39.
  • the outlet channel 35 extends substantially radially from the cylinder 19 into the bore 39.
  • the pin 38 has a recess 41 in its peripheral wall 40. Thus, if the mouth of the outlet channel 35 comes into the region of the recess 41, then the outlet channel 35 is released. Otherwise, the outlet channel 35 is blocked by the pin 38. In the cylinder 19, the mouth of the outlet channel 35 is still surrounded by an extension 42 axially in both directions. This extension 42 allows the outflow of concentrate from the cylinder 19 before the piston 20 has passed the outlet channel 35.
  • the cylinder barrel 18 is provided with a pin similar to the pin 38. This pin then projects into the swash plate, wherein the valve function can be arranged in the swash plate.
  • the projecting into the swash plate 23 pin can then have either on its front side or on its peripheral side corresponding openings, which, since the pin rotates with the cylinder drum 18, can serve as valve elements.
  • a sealing wall surrounding the cylinder drum 18 instead of the pin 38, whereby in this case the outlet channel 35 is guided essentially radially outwardly from the cylinder 19.
  • the sealing wall may then also have a recess corresponding to the recess 41 of the pin 38. If the outlet channel 35 comes into the region of this recess, then it is released. Otherwise it is covered by the sealing wall.
  • the outlet channel 35 may have different shapes. It can be designed, for example, as an annular channel or as an ellipse. He may also have a throttle groove.
  • FIG. 9 shows a further embodiment of an axial piston machine 8, in which elements which correspond to those of Figures 1 to 8, are provided with the same reference numerals.
  • FIG. 9a shows a longitudinal section through the machine
  • FIG. 9b shows a section A-A from FIG. 9a.
  • the arrangement of the outlet channels 35 corresponds to those of FIG. 8.
  • the valve assembly now has a pin 43 which projects into the cylinder drum 18.
  • the cylinders 19 can therefore be closed at the end by a cover plate 44.
  • the pin 43 also has a recess 41 on its peripheral wall 40, which releases the outlet channel 35 in a rotational angle range of the cylinder drum 18.
  • the pin 43 forms here the connection element.
  • the cylinder drum 18 forms the valve element here.
  • the pin 43 has at its end 45, which is inserted into the cylinder barrel 18, three recesses, which form a pump outlet 31, an engine inlet port 32 and a pump inlet opening 30. These openings 30-32 are separated by sealing zones 46-48.
  • In the pin 43 there are three channels, namely a high-pressure channel 49, which is connected to the pump outlet opening 31, a low-pressure channel 50, which communicates with the pump inlet opening. connected to the motor 30 and a recognizable only in Fig. 9b engine passage 51 which is connected to the engine inlet port 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une machine à pistons axiaux comprenant un tambour à cylindres qui comprend au moins deux cylindres, un piston (20) dans chaque cylindre qui repose avec une surface de frottement contre un plateau incliné (23), un agencement de soupape qui comprend un élément de raccordement stationnaire et un élément de soupape tournant avec le tambour à cylindres, l'élément de raccordement comprenant une ouverture d'entrée de pompe (30) reliée à un raccord d'entrée (33) et une ouverture de sortie de pompe (31) reliée à un raccord haute pression. L'on voudrait, lors de l'utilisation d'une telle machine dans un dispositif d'osmose inverse, obtenir un bon rendement. à cet effet, l'élément de raccordement comprend une ouverture d'entrée de moteur (32) qui est reliée à un raccord de retour haute pression et est en communication avec chaque cylindre par l'intermédiaire d'une première plage angulaire de rotation prédéterminée du tambour à cylindres.
PCT/DK2009/000199 2008-09-06 2009-09-04 Machine à pistons axiaux et dispositif d'osmose inverse WO2010025729A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008046168.7 2008-09-06
DE200810046168 DE102008046168B4 (de) 2008-09-06 2008-09-06 Axialkolbenpumpe und Umkehrosmoseeinrichtung

Publications (1)

Publication Number Publication Date
WO2010025729A1 true WO2010025729A1 (fr) 2010-03-11

Family

ID=41137005

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2009/000199 WO2010025729A1 (fr) 2008-09-06 2009-09-04 Machine à pistons axiaux et dispositif d'osmose inverse

Country Status (2)

Country Link
DE (1) DE102008046168B4 (fr)
WO (1) WO2010025729A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102207068A (zh) * 2010-03-30 2011-10-05 台湾联塑机器股份有限公司 可连接不同动力源的连体泵
WO2013072533A1 (fr) * 2011-11-18 2013-05-23 Bolsaplast, S.L. Pompe à pistons axiaux présentant une utilisation énergétique
WO2015071503A1 (fr) 2013-11-13 2015-05-21 Eco-Sistems Watermakers, S.L. Pompe hydraulique à pistons axiaux et à tambour rotatif flottant

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010052508A1 (de) * 2010-11-26 2012-05-31 Daimler Ag Abwärmenutzungsvorrichtung
DE102011114093B4 (de) 2011-09-21 2013-06-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Umkehrosmose-Anlage und deren Verwendung enthaltend einen aktiven Druckintensivierer
EP2837824B1 (fr) 2013-08-15 2015-12-30 Danfoss A/S Machine hydraulique, en particulier échangeur de pression hydraulique
DE102013216645A1 (de) * 2013-08-22 2015-02-26 Ksb Aktiengesellschaft Membrantrennverfahren
DE102013218965A1 (de) 2013-09-20 2015-03-26 Ksb Aktiengesellschaft Membrantrennverfahren
DE102017121334A1 (de) * 2017-09-14 2019-03-14 Danfoss Power Solution GmbH & Co OHG Steuerscheibe mit erhöhter Steifigkeit und Verfahren zur Herstellung einer solchen Steuerscheibe
CN110526339A (zh) * 2019-09-11 2019-12-03 上海瑜科环境工程有限公司 压能复合型脱盐工艺
CN110526338A (zh) * 2019-09-11 2019-12-03 上海瑜科环境工程有限公司 压能复合型脱盐机组

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1333019A (fr) * 1962-09-03 1963-07-19 Pompe à débit variable
WO1997031185A1 (fr) * 1996-02-23 1997-08-28 Innas Free Piston B.V. Transformateur de pression
US6038958A (en) * 1998-04-07 2000-03-21 Noax B.V. Porting for hydraulic pressure transformer
EP1172553A2 (fr) * 2000-07-13 2002-01-16 Mannesmann Rexroth AG Transformateur hydraulique
WO2002055173A1 (fr) * 2001-01-09 2002-07-18 Teknowsmartz Innovations Techn Pompe de recuperation fixe, regenerative et a plusieurs etages adaptee a des systemes de filtration
DE10220543A1 (de) * 2002-05-08 2003-11-20 Bosch Rexroth Ag Hydrotransformator
US20060051223A1 (en) * 2002-04-17 2006-03-09 Alexander Mark Hydrotransformer

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK434974A (da) * 1974-08-14 1976-02-15 Danske Mejeriers Maskinfabrik Anleg til membranfiltrering
DE4439545A1 (de) * 1994-11-05 1996-05-09 Gerhard Hestermann Vorrichtung zur teilweisen Trennung flüssiger Lösungen nach dem Prinzip der Querfiltration
US6139740A (en) * 1999-03-19 2000-10-31 Pump Engineering, Inc. Apparatus for improving efficiency of a reverse osmosis system
US6468431B1 (en) * 1999-11-02 2002-10-22 Eli Oklelas, Jr. Method and apparatus for boosting interstage pressure in a reverse osmosis system
DE10223844B4 (de) * 2002-05-28 2013-04-04 Danfoss A/S Wasserhydraulische Maschine
JP4111901B2 (ja) * 2003-09-26 2008-07-02 株式会社日本自動車部品総合研究所 流体機械

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1333019A (fr) * 1962-09-03 1963-07-19 Pompe à débit variable
WO1997031185A1 (fr) * 1996-02-23 1997-08-28 Innas Free Piston B.V. Transformateur de pression
US6038958A (en) * 1998-04-07 2000-03-21 Noax B.V. Porting for hydraulic pressure transformer
EP1172553A2 (fr) * 2000-07-13 2002-01-16 Mannesmann Rexroth AG Transformateur hydraulique
WO2002055173A1 (fr) * 2001-01-09 2002-07-18 Teknowsmartz Innovations Techn Pompe de recuperation fixe, regenerative et a plusieurs etages adaptee a des systemes de filtration
US20060051223A1 (en) * 2002-04-17 2006-03-09 Alexander Mark Hydrotransformer
DE10220543A1 (de) * 2002-05-08 2003-11-20 Bosch Rexroth Ag Hydrotransformator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102207068A (zh) * 2010-03-30 2011-10-05 台湾联塑机器股份有限公司 可连接不同动力源的连体泵
WO2013072533A1 (fr) * 2011-11-18 2013-05-23 Bolsaplast, S.L. Pompe à pistons axiaux présentant une utilisation énergétique
ES2410264A2 (es) * 2011-11-18 2013-07-01 Bolsaplast S.L. Bomba de pistones axiales con aprovechamiento energético
ES2410264R1 (es) * 2011-11-18 2013-07-11 Bolsaplast S L Bomba de pistones axiales con aprovechamiento energetico
WO2015071503A1 (fr) 2013-11-13 2015-05-21 Eco-Sistems Watermakers, S.L. Pompe hydraulique à pistons axiaux et à tambour rotatif flottant

Also Published As

Publication number Publication date
DE102008046168A1 (de) 2010-03-11
DE102008046168B4 (de) 2010-06-24

Similar Documents

Publication Publication Date Title
DE102008046168B4 (de) Axialkolbenpumpe und Umkehrosmoseeinrichtung
DE3050041T1 (de) Vane pump
EP1141551A1 (fr) Ensemble de pompes comportant deux pompes hydrauliques
DE2557147B2 (de) Druckflüssigkeitsgetriebene Gesteinsbohrmaschine
DE1776014B2 (de) Druckmittelsteuerung fuer hydraulische servoanlagen
DE10259894A1 (de) Pumpe
DE2406871B1 (de) Steuerspiegel einer hydraulischen Maschine
EP2771571A1 (fr) Machine à pistons hydrostatique
DE1211943B (de) Einrichtung zur Geraeuschminderung bei einer als Pumpe oder Motor verwendbaren, drehschiebergesteuerten hydraulischen Axial- oder Radialkolbenmaschine
DE102011105544A1 (de) Hydraulische Axialkolbenmaschine
DE4011671A1 (de) Regelbare fluegelzellenpumpe
DE3102506A1 (de) "kolbenpumpe mit geregelter foerderleistung"
EP1785622A1 (fr) Pompe hydraulique
DE3242983A1 (de) Regelbare fluegelzellenpumpe
DE10207348A1 (de) Volumenstromvariable Rotorpumpe
DE4135904A1 (de) Kolbenpumpe, insbesondere radialkolbenpumpe
DE4428410C2 (de) Kompakte Regeleinheit für eine Flügelzellenpumpe
DE19804374A1 (de) Axialkolbenmaschine mit Mitteldrucköffnung
DE102007039157B4 (de) Flügelzellenpumpe
WO1999066212A2 (fr) Dispositif de reglage destine a des appareils hydrauliques
DE3513923A1 (de) Fluegelzellenpumpe
DE1904635A1 (de) Pumpe mit rotierendem Kollektor
AT157037B (de) Pumpe.
DE4222644C2 (de) Als Motor oder Pumpe betreibbare Rotationsscheibenmaschine
DE3123420A1 (de) Fluegelpumpe mit veraenderbarem foerderstrom

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09776195

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 09776195

Country of ref document: EP

Kind code of ref document: A1