EP1363025A2 - Verdrängerpumpe mit Fördervolumenverstellung - Google Patents
Verdrängerpumpe mit Fördervolumenverstellung Download PDFInfo
- Publication number
- EP1363025A2 EP1363025A2 EP03011033A EP03011033A EP1363025A2 EP 1363025 A2 EP1363025 A2 EP 1363025A2 EP 03011033 A EP03011033 A EP 03011033A EP 03011033 A EP03011033 A EP 03011033A EP 1363025 A2 EP1363025 A2 EP 1363025A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- pressure
- pump
- piston
- controller
- 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
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/10—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by changing the positions of the inlet or outlet openings with respect to the working chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
Definitions
- the invention relates to a positive displacement pump with an adjustment of its specific Delivery volume.
- the pump comprises at least two rotatably mounted conveying wheels, the are in a conveying engagement with each other in a rotary drive of at least one of the feed wheels a working fluid under pressure increase from a low pressure side pump to a high pressure side of the pump.
- the invention further relates a system comprising the pump for supplying an aggregate with a Working or lubricating fluid.
- the pump is the Supplying an internal combustion engine with lubricating oil, i. she forms in this Use the lubricating oil pump of the engine.
- As a specific delivery volume is the to a speed of one of the conveyor wheels related flow of the pump [Delivery volume / speed] understood.
- Disturbing is an excess of oil flow, for example, in engine lubrication pumps and Oil supply pumps of automatic transmissions of motor vehicles. These Although units require at low engine speed and thus lower Pump speed, especially at idle, a minimum volume and at high Speed a minimum oil pressure, but the fluid requirement at higher speed is far below the proportionality line.
- the specific delivery volume of pumps should meet the needs of the consumer, For example, an internal combustion engine, an automatic transmission or a press, be adapted, i. it should be adjustable.
- the adjustment of the specific Delivery volume occurs in known positive displacement pumps by adjusting the Conveying engagement of the conveyor wheels. There are a whole series of adjustment mechanisms for this known.
- the specific Delivery volume is regulated so that it from a predetermined limit speed with further increasing input speed of the pump only at a lower rate than the speed increases or even remains constant.
- the pump has two externally toothed spur gears, which are received in a delivery chamber of the pump and mesh with each other. Of the Delivery intervention is formed by the tooth engagement of the two spur gears.
- To that limiting the specific delivery volume of the pump is one of the two spur gears on rotatably mounted on a piston. The piston is in a housing of the pump is moved straight and is used for the purpose of its displacement on one Piston side with the pumped by the pump fluid from the high pressure side of Pump applied.
- the fluid pressure acts on the opposite side of the piston Counteract spring element. From the balance of forces of fluid pressure and spring force results in the displacement position of the piston and thus the axial position of the on the spur gear mounted on the piston relative to the other, non-displaceable spur gear. It is therefore by the sliding movement of the piston, the axial engagement length of the both spur gears and thereby changed the specific delivery volume of the pump. Of the Piston is charged with the fluid of the high pressure side so that with increasing Fluid pressure the engagement length of the two spur gears against the restoring spring force of the spring element is reduced.
- the pump has an externally toothed internal gear and a internally toothed ring gear, around eccentric axes of rotation in a delivery chamber the pump housing are rotatably received and for fluid delivery be driven in rotation.
- the two conveyor wheels form in the direction of rotation of a body deepest meshing to a point of lowest meshing expanding Delivery cells and from the point lowest tooth engagement to the point deepest Meshing compressing delivery cells.
- In the field of expanding Feed cells opens an inlet into the delivery chamber and in the area of Compressive delivery cells discharge into the chamber.
- the expanding Fluid cells draw fluid from the inlet and the compressing delivery cells displace the fluid through the outlet.
- the ring gear is rotatably mounted in an eccentric ring.
- the Eccentric ring is eccentric in the housing about a to the axis of rotation of the ring gear
- Rotary axis also rotatably mounted.
- the known adjustment mechanisms require large restoring forces during the entire pump operation. If the return element that on the piston counteracts acting fluid pressure, a spring element, the spring chamber, the Spring element absorbs, be very long because of the required spring forces. If necessary, the spring element as a multiple spring, for example double spring, be educated.
- the invention relates to a positive displacement pump, the specific delivery volume is adjustable and a housing with a delivery chamber, at least two in the Delivery chamber recorded conveyor wheels and an adjustment for the Adjustment of their specific funding volume.
- Open into the delivery chamber at least one inlet and at least one outlet for a pump to be conveyed Fluid.
- the inlet is with a low pressure side of the pump and the outlet is with a High pressure side of the pump connected.
- As a low pressure side the entire Fluid guiding system from a fluid reservoir to the inlet in the Delivery chamber, i. the entire fluid delivery system upstream of the inlet including understood in the housing formed FluidzuGermankanäle.
- Must have a plurality of Aggregates are supplied, so that part of the fluid guide system forms the High-pressure side, which extends from the downstream outlet to at least inclusive the last of the aggregates to be supplied.
- the at least two, preferably exactly two, conveyor wheels are rotationally driven and are in a conveying engagement with each other to pressurize the fluid from the fluid Inlet to promote the outlet.
- the conveyor wheels are relative to each other or relative to the inflow or adjustable relative to the drain or relative to the inflow and outflow.
- the adjusting device comprises a piston for the adjustment of the conveyor wheels is coupled with at least one of the conveyor wheels.
- the coupling can in particular in forming the positive displacement pump as an external gear pump is that one the conveyor wheels, as in the knownêtenyakradpumpen on the piston rotatably mounted and together with the piston and relative to the other impeller axially is displaceable.
- the coupling can only by a variable speed be formed, which is an adjusting movement of the piston in an adjusting movement of the Converted conveyor wheels.
- An example of such a coupling is for one Internal gear pump, for example, from the aforementioned EP 1 182 351 known.
- the adjusting device further includes a first pressure chamber and a second Pressure chamber depending on an impact of the piston with the fluid pressure of the High pressure side.
- the piston protrudes with a first piston surface in the first pressure chamber and with a second piston area in the second pressure chamber.
- the one in the first Pressure chamber acting on the piston fluid pressure acts in the second pressure chamber against the fluid pressure acting on the piston.
- the two pressure chambers are each over a fluid connection connected to the high pressure side.
- the fluid connection with the High pressure side can each be formed independently, i. the two pressure chambers can be connected in parallel with the high pressure side. However, the two pressure chambers can also be connected to each other and then only together with the high pressure side.
- the fluid connection of the high pressure side can also be designed so that the one of the two pressure chambers is connected to the high pressure side and the other of the both pressure chambers with this directly connected pressure chamber and thereby first connected to the high pressure side.
- the connection can be through the piston or preferably be formed bypassing the piston.
- the adjusting device further comprises a spring element, preferably a mechanical Spring, which is the fluid pressure acting on the piston in the first pressure chamber counteracts.
- a spring chamber in which the spring element is arranged is preferably formed by the second pressure chamber. Basically, it would be too conceivable that the spring element is arranged outside the second pressure chamber and counteracts the fluid pressure in the first pressure chamber.
- the Fluid pressures in the two pressure chambers preferably equal, so that the spring element in the initial position is not loaded with fluid pressure.
- the fluid pressures can in principle, however, be chosen differently in the starting position. So can the fluid pressure in the second pressure chamber is less than the fluid pressure in the first one Pressure chamber to the spring element in the initial position of the piston under a Hold bias.
- the position of the Conveyor wheels preferably so that the pump their largest specific flow having.
- the adjusting device furthermore has a regulator which controls the fluid pressure of at least one of the two pressure chambers as a function of one for the Fluid control regulates relevant controlled variable, so that in relation to the specific delivery volume advantageous delivery characteristic of the pump adjusts.
- the Control variable is preferably removed on the high pressure side and can, for example the temperature of the fluid or an aggregate to be supplied by the pump with Lubricating oil is supplied, or the viscosity of the fluid.
- a Fluid pressure of the high pressure side of the controlled variable and is in the following Distinction of fluid pressures other than fluid control pressure referred to the Use as a controlled variable.
- the fluid control pressure can in particular be given directly to a trained as a fluidic regulator controller to the To influence the controller.
- the speed of a Reciprocating engine or other unit to be supplied or non-rotary Moves a comparable frequency the controlled variable.
- the controlled variable can with Advantage be synthetically formed, in particular according to a demand line or a Demand characteristic field of the unit to be supplied or to be supplied Plurality of aggregates. By way of example, this is again about the speed Planned demand characteristic field or only one demand characteristic of a Reciprocating engine called.
- an engine control unit the controlled variable generate and give the controller as a control variable electrically or visually.
- the Controlled variable therefore does not have to be a direct result of the pumping activity immediately may be a resulting physical quantity, but may instead be a size that for one to be supplied unit, such as a motor, or for another with characteristic of the fluid in contact with the component. Also such Control variable is preferably removed on the high pressure side.
- the first pressure chamber is connected to the high-pressure side
- the second pressure space is in the first controller state via the controller with the first pressure room connected.
- the first pressure chamber and the second pressure chamber in the first controller state via the controller each individually or connected together with the high pressure side. Both pressure chambers are in the second Execution thus in the first controller state via the controller with the fluid Fed high pressure side.
- the controller separates in the second Controller state the second pressure chamber from the high pressure side. Preferably connects he in both versions in the second controller state with the second pressure chamber the low pressure side.
- the pressures in the two pressure chambers are preferably always the same, so that on the Spring element no fluid pressure force acts.
- the controller closes the at least one of two pressure chambers, whose fluid pressure he controls, in a first controller state directly with the high pressure side or with the other of the two pressure chambers preferably short, so that a distortion-free pressure equalization takes place.
- This increases the Control dynamics.
- the spring element must at least in the first control state compensate for any differential pressures, but at best for a secure, mechanical stop contact of the piston in the position for maximum delivery to care.
- the spring element can therefore be soft and in the direction of piston movement be short.
- the spring element is preferably designed so that it just the fail-safe function fulfilled and in this function the maintenance of a minimum pressure on the Ensures high pressure side.
- the minimum pressure is in preferred uses, like that for supplying a reciprocating engine with lubricating oil, two bar or less.
- the spring element is therefore preferably designed and installed so that it is a force which gives a pressure difference between the pressure chambers of two bar or less corresponds. At pressure differences smaller than that by design and Installation default value, the spring element forces the piston in the position for Maximum funding.
- the pressure of the second pressure chamber is changed by the controller, For example, with increasing fluid control pressure, increasing temperature or Increasing speed continuously reduced or in one or more stages.
- the pressure of the first pressure chamber instead to enlarge. It would also be conceivable, the pressures in both pressure chambers adjusted by means of the controller to the desired conveying characteristic receive.
- the controller is preferably a multi-state controller, which is a plurality of discrete ones Controller states, i. Switching states or switching positions, can take. Which of the Switch positions of the controller takes, is determined by the controlled variable. Be as Controlled variable, the fluid control pressure and a controller as a fluidic, in particular a Control valve, used, so the switching position is preferred by the difference from the Force exerted by the fluid control pressure, and the fluid control pressure counteracting Restoring force determined.
- the controller is on Two-state controller, the second pressure chamber in a first of two Switch positions with the high pressure side of the pump and in the second switching position with the low pressure side of the pump connects.
- a control valve forms the Regulator, particularly preferably a multi-way valve with at least two switching positions.
- a regulator with discrete controller states is in preferred other Versions a continuous regulator, preferably a proportional valve, whose controller states are dependent on the controlled variable change continuously.
- the controller can in a likewise preferred embodiment be an electromagnetic controller, of course still regulates a fluid pressure.
- the positive displacement pump is preferably designed as a gear pump, wherein both External gear pumps and internal gear pumps preferred embodiments are. If an external gear pump forms the positive displacement pump, then the first and the second conveying wheel each formed by an externally toothed spur gear.
- the Delivery chamber is essentially of the lateral surfaces of the housing, which in Surrounding toothed front wheels surrounded, and formed sealing surfaces, the Face opposite faces of the spur gears axially.
- One of the two spur wheels is rotatably mounted on the piston and relative to the piston in the housing relative axially straight to the other spur gear.
- the piston forms the so movably mounted spur gear axially facing sealing surfaces of the delivery chamber. Of the first pressure chamber and the second pressure chamber are in the this embodiment in the axial extension on both sides of the displaceable spur gear. preferred Details of an external gear pump are described in DE 198 47 132 C2.
- a gear wheel set forms an externally toothed internal gear and an internally toothed ring gear, which mesh with each other in a meshing meshing are the first and the second impeller.
- a gear wheel set forms an externally toothed internal gear and an internally toothed ring gear, which mesh with each other in a meshing meshing are the first and the second impeller.
- Figure 1 in a longitudinal section and Figure 2 in the cross section A-A show a External gear pump, which is regulated in relation to its specific delivery volume, that in a lower speed range the delivery volume of the pump and together so that the fluid pressure of the high pressure side with the speed increase more than in one upper area.
- the control is two-stage with a constant specific displacement in the lower speed range up to the Limit speed. Upon reaching the limit speed, the pump is stopped, i. it the specific delivery volume is reduced so that the fluid pressure at another Speed increase remains constant.
- a housing 3 of the pump forms a delivery chamber 4 in which a first delivery wheel 1 is rotatably received about its axis of rotation D 1 and a second delivery wheel 2 about its axis of rotation D 2 .
- the conveyor wheels 1 and 2 are externally toothed spur gears. The two external teeth are denoted by 1a and 2a.
- the conveyor wheels 1 and 2 are with their teeth 1a and 2a in a meshing tooth engagement. In the engagement region of the conveyor wheels 1 and 2 opens to one side of an inlet 5 and to an opposite side an outlet 6, as best seen in Figure 2.
- a rotary drive of the conveyor wheels 1 and 2 is sucked by the tooth engagement fluid from the inlet 5 and displaced by the outlet 6 under pressure increase.
- this conveying operation is indicated by directional arrows for the fluid and the direction of rotation of the conveyor wheels 1 and 2.
- the entire fluid guide in and outside the pump up to the pressure increase is understood in the context of the invention as a low pressure side.
- the feed wheel 1 is mounted on the drive shaft twisting and 29iebegeschreibt.
- the driven conveyor wheel 1 can perform relative to the housing 3 only rotational movements about its axis of rotation D 1 .
- the second delivery wheel 2 is mounted between two piston bodies 7 and 8 on a connecting portion which connects the two piston bodies 7 and 8 to each other about its axis of rotation D 2 and rotatably relative to the piston bodies 7 and 8 is not displaceable.
- the two piston bodies 7 and 8 form a double effective piston which is straight in a bore of the housing 3 along the axis of rotation D 2 of the feed wheel 2 back and forth.
- the housing 3 forms on one side of the piston 7/8 a first pressure chamber 9 and on the other side of the piston 7/8 a second pressure chamber 10, which is opposite to the first pressure chamber 9 along the axis of rotation D 2 .
- the piston 7/8 seals with its piston body 7 from the first pressure chamber 9 and with its piston body 8, the second pressure chamber 10 from.
- the piston 7/8 fluidly separates the two pressure chambers 9 and 10 from each other.
- the in the first pressure chamber 9 acted upon by a pressure P 9 piston surface of the piston body 7 is the same size as that in the second pressure chamber 10 with a pressure P 10 acted upon piston surface of the piston body 8, so that at both opposite piston sides the same pressure force on the Piston 7/8 acts as long as in the two pressure chambers 9 and 10, the same pressure prevails.
- a mechanical compression spring is received as a spring element 13.
- the spring element 13 is axially supported on a bottom of the pressure chamber 10 and axially opposite to the piston body 8. When the spring element 13 is axially under compressive stress, it counteracts the pressure acting in the first pressure chamber 9 on the piston 7/8 fluid pressure P. 9
- the second pressure chamber 10 also forms the spring chamber, ie the installation space, for the spring element 13.
- the first pressure chamber 9 is connected by a first fluid connection 11 to the high pressure side.
- a second fluid connection 12 is provided in order to connect the second pressure chamber 10 with the high-pressure side.
- the second fluid connection 12 is connected via a control valve 15 to the high pressure side.
- the control valve 15 is a directional control valve with two switching positions. The control valve 15 connects in a first switching position shown in Figure 1, the second fluid connection 12 with the first fluid connection 11 and bypassing the piston 7/8, the connection of the second pressure chamber 10 to the high pressure side. In a second switching position, it separates the second pressure chamber 10 from the high-pressure side and blocks the first fluid connection 11.
- the first pressure chamber 9 remains connected in the second switching position continues to the high-pressure side or is at least completed.
- the control valve 15 connects in the second switching position the second pressure chamber 10 with the low pressure side.
- the second pressure chamber 10 is connected to a fluid reservoir 20 in the second switching position of the control valve 15.
- the fluid reservoir 20 is a fluid sump.
- the fluid connections 11 and 12 are arranged in the immediate vicinity of the pump, preferably they are integrated into the housing 3 of the pump.
- the control valve 15 is integrated into the housing 3 or at least externally mounted on the housing 3.
- the first pressure chamber 9 and in the first switching position of the control valve 15 and the second pressure chamber 10 thus obtain their pressure fluid preferably from within the housing 3. In principle, it would also be conceivable that they their pressurized fluid from a suitable point on the high pressure side downstream of the housing. 3 Respectively.
- the control valve 15 is switched in response to a fluid control pressure P R. It is held by a return element 16, which is designed in the embodiment as a mechanical spring element, in the first switching position, which corresponds to a starting position of the control valve 15 and the piston 7/8.
- the return element 16 counteracts the fluid control pressure P R. Once the fluid control pressure P R has reached a limiting pressure, the control valve 15 jumps against the restoring force of the return element 16 from the first switching position to its second switching position.
- the fluid control pressure P R is removed from the high pressure side of the pump. Basically, although it can be removed directly in the delivery chamber 4 at the high pressure side, at the outlet 6, from within the housing 3 behind the delivery chamber 4 or in the immediate vicinity downstream of the housing 3, but the fluid control pressure P R is preferred at one point Removed high pressure side at which the fluid pressure corresponds to the fluid pressure of a pump to be supplied by the pump with the consumer as closely as possible. If the consumer is, for example, the reciprocating engine of a motor vehicle, the fluid control pressure P R is preferably the pressure of the so-called main gallery. Accordingly, the control valve 15 is connected via a fluid connection with the relevant point of the high pressure side. A suitable location for the decrease of the fluid control pressure P R is located in particular between the consumer and a last filter in front of the consumer.
- the operation of the pump control is below for a preferred Use of the pump described as a lubricating oil pump for a reciprocating engine, assuming that the pump from the crankshaft of the engine directly or driven by a gearbox and thus depending on the speed of the engine becomes.
- the pressure P 10 in the second pressure chamber 10 is in the lower engine speed range, therefore, just as high as the pressure P 9 in the first pressure chamber 9.
- the axial engagement length of the two conveyor wheels 1 and 2 therefore, as shown in Figure 1, maximum.
- the maximum engagement length corresponds in the embodiment of the length of the two equal length conveyor wheels 1 and 2. It is zero promotion, especially at standstill of the conveyor wheels 1 and 2, and, as I said, in the lower speed range of the engine and thus in the lower speed range of the conveyor wheels. 1 and 2 to a predetermined by the control valve 15 limit speed maintained.
- the first feed wheel 1 is rotationally driven about its axis of rotation D 1 from the crankshaft ago and drives via the meshing the second feed wheel 2 about its axis of rotation D 2 also.
- the tooth engagement lubricating oil is sucked from the low pressure side, ie from the oil sump 20 through the inlet 5 into the delivery chamber 4.
- the fluid is conveyed through a delivery chamber, which is tightly surrounded by lateral surfaces of the housing 3 around the Zahnkopf Vietnamesee the conveyor wheels 1 and 2 and axial sealing surfaces, to the outlet 6.
- the axial sealing surfaces are for the feed wheel 1 of the housing 3 and formed for the feed wheel 2 of the two piston bodies 7 and 8.
- the oil is conveyed to the engine via an oil filter, cooled behind the engine in a condenser, and finally returned to the sump 20 while being depressurized to the low pressure side pressure.
- the fluid control pressure P R increases according to the pump characteristic. If the limit speed is reached, the fluid control pressure P R is so large that the control valve 15 switches under its action in its second switching position.
- the second pressure chamber 10 is connected in the second switching position of the control valve 15 with the low pressure side, namely with the sump 20. In the second switching state of the control valve 15 are thus the first pressure chamber 9 under the high pressure P 9 of the high pressure side and the second pressure chamber 10 under the negligible pressure P 10 of the low pressure side.
- the piston 7/8 and together with it rotatably mounted by him second impeller 2 are axially displaced under the action of the pressure P 9 against the elasticity force of the spring element 13.
- the engagement length of the conveyor wheels 1 and 2 and concomitantly the specific delivery volume of the pump is reduced.
- the reduction of the specific delivery volume has a lowering of the fluid pressure on the high pressure side, ie the fluid control pressure P R result. If the fluid control pressure P R falls below the limit, then the control valve 15 falls back into its first switching position, in which it connects the second pressure chamber 10 via the two fluid connections 11 and 12 with the first pressure chamber 9.
- the pump is thus regulated from reaching the limit speed for compliance with the limit value of the fluid control pressure P R. By regulating a pressure limit and thus a delivery volume limit of the pump is obtained.
- the fluid pressure of the high pressure side increases in the lower speed range of the driven first impeller 1 up to the limit speed substantially proportional to the speed and buckles at the limit speed in a horizontal, ie the fluid pressure of the high pressure side remains constant in the speed range above the limit speed.
- control valve 15 By replacing the control valve 15 by another control valve with more than two discrete switch positions or a continuous control valve, for example a Proportional valve, other pressure curves can be realized. That's the way it works For example, be advantageous if the described pressure curve in the lower Speed range and an adjoining middle speed range is set, the fluid pressure of the high pressure side but in a to the middle Speed range subsequent high speed range again with the speed of the driven first delivery wheel 1 increases.
- Realization of such a Pressure curve could be the control valve 15 of the embodiment by a control valve be replaced with three switch positions and the second pressure chamber 10 in the upper Connect the speed range via a pressure reducing element with the high pressure side to to support the spring element 13.
- FIGS 3 to 6 show an internal gear pump with also one inventive adjustment of the specific delivery volume of the pump.
- FIGS 3 and 4 show the internal gear pump each in a cross section.
- the first feed wheel 1 of the internal gear pump is formed by a rotationally driven internal gear with external teeth 1a.
- the second feed wheel 2 is formed by a ring gear with an internal toothing 2i.
- the external toothing 1a has one tooth less than the internal toothing 2i.
- the first conveyor wheel 1 is seated against rotation on a rotationally driven shaft.
- the second conveying wheel 2 is rotatably mounted in the housing 3 of the pump.
- the axis of rotation D 1 of the first conveyor wheel 1 is parallel spaced, ie eccentrically, to the axis of rotation D 2 of the second impeller 2.
- the eccentricity is denoted by "e”.
- the first conveying wheel 1 and the second conveying wheel 2 form between them Fluid pumping space in the pressure-tight against each other closed conveyor cells 24th is divided.
- the individual conveyor cells 24 are each between two successive teeth of the first conveying wheel 1 and the second conveying wheel 2 educated. From a point of deepest meshing to a point of least meshing the conveyor cells 24 are increasingly larger in the direction of rotation, to subsequently from the location of lowest meshing to the point of deepest meshing again to decrease.
- the growing, i. expanding conveyor cells 24 are connected to the Inlet 5 of the delivery chamber 4 and the decreasing, i. compressed Delivery cells 24 are connected to the outlet 6 of the delivery chamber 4.
- the inlet 5 and the outlet 6 is connected laterally to the conveyor cells 25, kidney-shaped groove openings formed in sealing surfaces of the housing 3, the Conveyor wheels 1 and 2 facing axially.
- the inlet 5 forming Opening covers expanding delivery cells 24 and the outlet 6 forming Opening covers compressed conveying cells 24 of the two conveyor wheels 1 and 2.
- Im Area of the location of the deepest meshing and in the area of the location of least meshing the housing forms sealing webs between the inlet 5 and the outlet 6
- Rotational driving of the conveyor wheels 1 and 2 becomes fluid from the expanding conveyor cells 24 sucked from the low pressure side, over the place least gear mesh transported and on the high pressure side under higher pressure through the outlet 6 repressed.
- the second delivery wheel 2 is received in an eccentric ring 21 which is rotatably supported by the housing 3 and can be adjusted relative to the housing 3 with respect to its rotational angular position.
- the second conveying wheel 2 is freely rotatably mounted in the eccentric ring 21 by means of a sliding rotary bearing.
- Figure 3 shows the eccentric ring 21 and the conveyor wheels 1 and 2 in an initial position in which the specific delivery volume of the pump has its maximum.
- the eccentric ring 21 is rotated against the direction of rotation of the conveyor wheels 1 and 2, the axis of rotation D 2 of the second impeller 2 moves from the initial position counter to the rotational direction about the axis of rotation D 1 of the first impeller 1.
- Figure 4 shows the eccentric ring 21 in its end position, in which the specific delivery volume of the pump has reached its minimum. The end position shown in Figure 4 is the zero position of the pump, in the ideal case, no fluid is conveyed.
- Figures 5 and 6 show an adjusting mechanism for adjusting the Angular position of the eccentric 21.
- the eccentric ring 21 is cup-shaped with a Ring body, which forms the actual eccentric ring as pot wall, a pot bottom and one of the pot bottom axially projecting pin 22.
- the pin 22 is to the Ring body of the eccentric ring 21 concentric.
- the pin 22 is connected to a Spur toothing 23 provided.
- the toothing 23 is connected to the toothing 26 of a Piston 25 in meshing engagement.
- the piston 25 is reciprocated in the housing 3 of the pump slidably mounted and forms with its teeth 26 a rack.
- the piston 25 seals at a piston side a first pressure chamber 9 and at a second Piston side from a second pressure chamber 10 from.
Abstract
Description
- Figur 1
- eine Außenzahnradpumpe in einem Längsschnitt,
- Figur 2
- die Außenzahnradpumpe in einem Querschnitt,
- Figur 3
- eine Innenzahnradpumpe in einer Ausgangsstellung in einem Querschnitt,
- Figur 4
- die Innenzahnradpumpe in einer Endstellung,
- Figur 5
- die Innenzahnradpumpe in einem Längsschnitt und
- Figur 6
- die Innenzahnradpumpe in einem weiteren Querschnitt.
Die Fluidverbindungen 11 und 12 sind in unmittelbarer Nähe der Pumpe angeordnet, vorzugsweise sind sie in das Gehäuse 3 der Pumpe integriert. Vorzugsweise ist auch das Regelventil 15 in das Gehäuse 3 integriert oder doch zumindest außen an dem Gehäuse 3 montiert. Der erste Druckraum 9 und in der ersten Schaltstellung des Regelventils 15 auch der zweite Druckraum 10 beziehen ihr Druckfluid somit bevorzugt von innerhalb des Gehäuses 3. Grundsätzlich wäre es jedoch auch denkbar, dass sie ihr Druckfluid von einer geeigneten Stelle der Hochdruckseite stromabwärts von dem Gehäuse 3 beziehen.
- 1
- Förderrad
- 1a
- Verzahnung
- 2
- Förderrad
- 2a, 2i
- Verzahnung
- 3
- Gehäuse
- 4
- Förderkammer
- 5
- Einlass
- 6
- Auslass
- 7
- Kolbenkörper
- 8
- Kolbenkörper
- 9
- Druckraum
- 10
- Druckraum
- 11
- Fluidverbindung
- 12
- Fluidverbindung
- 13
- Federelement
- 14
- -
- 15
- Regler, Regelventil
- 16
- Rückstellelement
- 17
- -
- 18
- -
- 19
- -
- 20
- Fluidsumpf
- 21
- Exzenterring
- 22
- Zapfen
- 23
- Verzahnung
- 24
- Förderzellen
- 25
- Kolben
- 26
- Verzahnung
- D1
- Drehachse
- D2
- Drehachse
- P9
- Fluiddruck
- P10
- Fluiddruck
- PR
- Fluidregeldruck
Claims (16)
- Verdrängerpumpe mit verstellbarem spezifischen Fördervolumen, umfassend:a) ein Gehäuse (3), das eine Förderkammer (4) enthält, in die an einer Niederdruckseite der Pumpe wenigstens ein Einlass (5) für Fluid und an einer Hochdruckseite der Pumpe wenigstens ein Auslass (6) für Fluid münden,b) wenigstens zwei in der Förderkammer (4) aufgenommene, drehantreibbare Förderräder (1, 2), die miteinander in einem Fördereingriff sind, um das Fluid von dem Einlass (5) zu dem Auslass (6) zu fördern, wobei die Förderräder (1, 2) so verstellbar sind, dass durch eine Verstellung der Förderräder (1, 2) relativ zueinander oder relativ zu dem Einlass (5) und/oder dem Auslass (6) das spezifische Fördervolumen der Pumpe verstellt wird,c) einen Kolben (7/8; 25), der für die Verstellung der Förderräder (1, 2) mit wenigstens einem der Förderräder (1, 2) gekoppelt ist,d) einen ersten Druckraum (9) und einen zweiten Druckraum (10) für eine Beaufschlagung des Kolbens (7/8; 25) je mit Fluid der Hochdruckseite, wobei ein auf den Kolben (7/8; 25) wirkender Fluiddruck (P9) des ersten Druckraums (9) einem auf den Kolben (7/8; 25) wirkenden Fluiddruck (P10) des zweiten Druckraums (10) entgegenwirkt,e) eine erste Fluidverbindung (11), die den ersten Druckraum (9) mit der Hochdruckseite verbindet, und eine zweite Fluidverbindung (12), die den zweiten Druckraum (10) mit der Hochdruckseite verbindet,f) ein Federelement (13), das dem in dem ersten Druckraum (9) auf den Kolben (7/8; 25) wirkenden Fluiddruck (P9) entgegenwirkt,g) und einen Regler (15), der den Fluiddruck (P10) des zweiten Druckraums (10) in Abhängigkeit von einer für die Fluidförderung der Pumpe maßgeblichen Regelgröße (PR) regelt.
- Verdrängerpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Regelgröße (PR) ein Fluidregeldruck von der Hochdruckseite ist.
- Verdrängerpumpe nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass an den Regler (15) eine Verbindungsleitung angeschlossen ist, durch die unter dem Fluidregeldruck (PR) stehendes Fluid der Hochdruckseite von außerhalb des Gehäuses (3) der Pumpe dem Regler (15) zuführbar ist.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) ein Regelventil ist oder umfasst, dem als die Regelgröße (PR) ein Fluidregeldruck (PR) von der Hochdruckseite der Pumpe aufgegeben wird, wobei dem Fluidregeldruck (PR) eine Rückstellkraft eines Rückstellelements (16) entgegenwirkt.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) ein Regelventil mit wenigstens zwei diskreten Schaltstellungen (Reglerzustände) ist oder umfasst, die in Abhängigkeit von der Regelgröße (PR) geschaltet werden.
- Verdrängerpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Regler (15) ein kontinuierlich regelndes Regelventil ist oder umfasst, das den Fluiddruck in der zweiten Druckkammer (10) in Abhängigkeit von der Regelgröße (PR) kontinuierlich regelt.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) die zweite Fluidverbindung (12) unterbricht, wenn die Regelgröße (PR) einen vorgegebenen Wert erreicht oder überschreitet.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) in einem ersten Reglerzustand den zweiten Druckraum (10) mit der Hochdruckseite der Pumpe und in einem zweiten Reglerzustand mit der Niederdruckseite der Pumpe verbindet, wobei der Regler (15) den zweiten Reglerzustand bei einem größeren Wert der Regelgröße (PR) einnimmt als den ersten Reglerzustand.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) in einem ersten Reglerzustand den zweiten Druckraum (10) mit dem ersten Druckraum (9) verbindet und in einem zweiten Reglerzustand von dem ersten Druckraum (9) trennt, wobei der Regler (15) den zweiten Reglerzustand bei einem größeren Wert der Regelgröße (PR) einnimmt als den ersten Reglerzustand.
- Verdrängerpumpe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Regler (15) in einem ersten Reglerzustand den ersten Druckraum (9) und den zweiten Druckraum (10) je einzeln mit der Hochdruckseite der Pumpe verbindet und in einem zweiten Reglerzustand den zweiten Druckraum (10) von der Hochdruckseite trennt, wobei der Regler (15) den zweiten Reglerzustand bei einem größeren Wert der Regelgröße (PR) einnimmt als den ersten Reglerzustand.
- Verdrängerpumpe nach einem der zwei vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Regler (15) in dem zweiten Reglerzustand den zweiten Druckraum (10) mit der Niederdruckseite der Pumpe verbindet.
- Verdrängerpumpe nach einem der vier vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die durch den Regler (15) jeweils geschaffene Fluidverbindung ein Kurzschluss für einen verzugslosen Druckausgleich ist.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Pumpe eine Außenzahnradpumpe ist und die wenigstens zwei Förderräder (1, 2) außenverzahnte Stirnräder sind, die miteinander in einem kämmenden Zahneingriff sind, um das Fluid von dem Einlass (5) zu dem Auslass (6) zu fördern, wobei der Kolben (7/8) eine Drehlagerung für eines der Förderräder (1, 2) bildet und wobei durch eine axiale Verschiebung des Kolbens (7/8) eine axiale Eingriffslänge der Förderräder (1, 2) verändert und dadurch das spezifische Fördervolumen der Pumpe verstellt wird.
- Verdrängerpumpe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Pumpe eine Innenzahnradpumpe ist und die wenigstens zwei Förderräder (1, 2) ein außenverzahntes Innenrad und ein innenverzahntes Hohlrad sind, die in einem kämmenden Zahneingriff Förderzellen bilden, die das Fluid von dem Einlass (5) zu dem Auslass (6) fördern, wobei das Hohlrad wenigstens einen Zahn mehr aufweist als das Innenrad, die Verdrängerpumpe umfassend:einen Exzenterring (21), der in dem Gehäuse (3) um eine Exzenterringdrehachse (D1) drehbar gelagert ist und eines der Förderräder (1, 2) um seine Drehachse (D2) drehbar lagert, wobei die Exzenterringdrehachse (D1) und die Drehachse (D2) des von dem Exzenterring (21) drehbar gelagerten Förderrads (2) zueinander exzentrisch sind,und ein Verstellgetriebe (23, 26), das den Exzenterring (21) mit dem Kolben (25) koppelt und eine Verstellbewegung des Kolbens (25) in eine Drehbewegung des Exzenterrings (21) umwandelt, um die Förderräder (1, 2) relativ zu dem Einlass (5) und dem Auslass (6) zu verstellen.
- System zur Versorgung eines Aggregats, vorzugsweise eines Verbrennungskolbenmotors, mit einem Arbeitsfluid oder Schmierfluid, das System umfassend:a) eine Verdrängerpumpe nach einem der vorhergehenden Ansprüche,b) eine Fluidführungseinrichtung, die das Aggregat und ein Fluidreservoir (20) umfasst und durch die das Fluid über das Aggregat und das Fluidreservoir (20) in einem Kreislauf förderbar ist,c) wobei die Niederdruckseite der Pumpe sich von dem Einlass (5) der Förderkammer (4) stromaufwärts bis wenigstens zu dem Fluidreservoir (20) erstreckt,d) und wobei die Hochdruckseite der Pumpe sich von dem Auslass (6) der Förderkammer (6) stromabwärts bis wenigstens zu dem Aggregat erstreckt.
- System nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass auf der Hochdruckseite der Pumpe in der Fluidführungseinrichtung zwischen dem Auslass (6) der Förderkammer (4) und dem Aggregat ein Fluidfilter angeordnet ist und die Regelgröße (PR) stromabwärts von dem Fluidfilter abgenommen wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10222131A DE10222131C5 (de) | 2002-05-17 | 2002-05-17 | Verdrängerpumpe mit Fördervolumenverstellung |
DE10222131 | 2002-05-17 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1363025A2 true EP1363025A2 (de) | 2003-11-19 |
EP1363025A3 EP1363025A3 (de) | 2006-04-19 |
EP1363025B1 EP1363025B1 (de) | 2011-07-06 |
Family
ID=29265354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03011033A Expired - Lifetime EP1363025B1 (de) | 2002-05-17 | 2003-05-19 | Verdrängerpumpe mit Fördervolumenverstellung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1363025B1 (de) |
AT (1) | ATE515636T1 (de) |
DE (1) | DE10222131C5 (de) |
ES (1) | ES2367969T3 (de) |
Cited By (8)
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AT500629A1 (de) * | 2004-05-27 | 2006-02-15 | Tcg Unitech Ag | Zahnradpumpe |
GB2436594A (en) * | 2006-03-28 | 2007-10-03 | Concentric Vfp Ltd | A variable output pump assembly |
DE102010020299A1 (de) | 2010-05-12 | 2011-11-17 | Schwäbische Hüttenwerke Automotive GmbH | Pumpe mit Reibkupplungs-Drehzahlregelung |
CN102345600A (zh) * | 2010-07-26 | 2012-02-08 | 施韦比施冶金厂汽车有限公司 | 具有抽吸槽的容积泵 |
EP2366414A3 (de) * | 2008-07-18 | 2012-06-13 | Becton, Dickinson and Company | Doppelkammer- und Getriebepumpenanordnung für ein Hochdruckinjektionssystem |
DE102011013756A1 (de) * | 2011-03-12 | 2012-09-13 | Volkswagen Aktiengesellschaft | Zahnradpumpe mit Verschiebeeinheit zur Einstellung einer Fördermenge |
US9416786B2 (en) | 2012-08-14 | 2016-08-16 | Schwabische Huttenwerke Automotive Gmbh | Rotary pump exhibiting an adjustable delivery volume, in particular for adjusting a coolant pump |
US9735644B2 (en) | 2012-12-11 | 2017-08-15 | Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. | Inverter-integrated electric compressor |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102004002062A1 (de) * | 2004-01-15 | 2005-08-04 | Volkswagen Ag | Zahnradpumpe mit Fördermengenregelung |
DE102004028830A1 (de) * | 2004-06-15 | 2005-12-29 | Zf Friedrichshafen Ag | Zahnradmaschine |
DE102006011200B4 (de) * | 2006-03-10 | 2014-11-13 | Schwäbische Hüttenwerke Automotive GmbH & Co. KG | Außenzahnradpumpe mit Entlastungstasche |
DE102006018124A1 (de) | 2006-04-19 | 2007-10-25 | Schwäbische Hüttenwerke Automotive GmbH & Co. KG | Verstellbare Rotationspumpe mit Verschleißminderung |
DE102006044810A1 (de) * | 2006-09-22 | 2008-03-27 | Bayerische Motoren Werke Ag | Flüssigkeitspumpe mit regelbarem Fördervolumen |
DE102009019419B4 (de) | 2009-04-29 | 2016-01-14 | Schwäbische Hüttenwerke Automotive GmbH | Umlaufverdrängermaschine mit vereinfachter Lagerachse oder -welle |
DE102009019418B4 (de) | 2009-04-29 | 2013-05-16 | Schwäbische Hüttenwerke Automotive GmbH | Umlaufverdrängerpumpe mit verbesserter Lagerschmierung |
DE102009060188B4 (de) * | 2009-12-23 | 2016-07-07 | Schwäbische Hüttenwerke Automotive GmbH | Verstellventil für die Verstellung des Fördervolumens einer Verdrängerpumpe mit Kaltstartfunktion |
DE102009060189B4 (de) | 2009-12-23 | 2017-07-13 | Schwäbische Hüttenwerke Automotive GmbH | Regelvorrichtung für die Verstellung des Fördervolumens einer Pumpe |
DE102010003574B4 (de) | 2010-03-31 | 2012-02-09 | Schwäbische Hüttenwerke Automotive GmbH | Pressverbund und Verfahren zur Herstellung eines Pressverbunds |
DE102010051141B3 (de) * | 2010-11-11 | 2011-12-29 | Dieter Voigt | Regelkolbenanordnung |
DE102011005408B4 (de) | 2011-03-11 | 2014-02-13 | Schwäbische Hüttenwerke Automotive GmbH | Verfahren zur Herstellung einer Fügeverbindung in einer Pumpe oder eines Nockenwellen-Phasenstellers |
DE102014207070B4 (de) | 2014-04-11 | 2016-11-24 | Volkswagen Aktiengesellschaft | Pumpe |
CN105041639A (zh) * | 2015-08-27 | 2015-11-11 | 刘凡 | 一种外啮合变量齿轮泵 |
DE102015015481A1 (de) | 2015-11-28 | 2016-07-21 | Daimler Ag | Verdrängerpumpe für einen Kraftwagen |
DE102017117787A1 (de) | 2017-08-04 | 2019-02-07 | Schwäbische Hüttenwerke Automotive GmbH | Verstellbare Außenzahnradpumpe |
DE102018211125B4 (de) * | 2018-07-05 | 2020-03-26 | Continental Automotive Gmbh | Zahnradpumpe und Wärmekraftmaschine mit einer Zahnradpumpe |
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- 2003-05-19 ES ES03011033T patent/ES2367969T3/es not_active Expired - Lifetime
- 2003-05-19 EP EP03011033A patent/EP1363025B1/de not_active Expired - Lifetime
- 2003-05-19 AT AT03011033T patent/ATE515636T1/de active
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DE2218391A1 (de) | 1971-04-16 | 1972-10-26 | Joseph Lucas (Industries) Ltd., Birmingham (Grossbritannien) | Radialkolbenpumpe |
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DE3503491A1 (de) | 1985-02-01 | 1986-08-14 | Mannesmann Rexroth GmbH, 8770 Lohr | Regelventil fuer eine pumpe mit variablem verdraengungsvolumen |
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Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT500629A1 (de) * | 2004-05-27 | 2006-02-15 | Tcg Unitech Ag | Zahnradpumpe |
AT500629B1 (de) * | 2004-05-27 | 2006-07-15 | Tcg Unitech Ag | Zahnradpumpe |
GB2436594A (en) * | 2006-03-28 | 2007-10-03 | Concentric Vfp Ltd | A variable output pump assembly |
EP2366414A3 (de) * | 2008-07-18 | 2012-06-13 | Becton, Dickinson and Company | Doppelkammer- und Getriebepumpenanordnung für ein Hochdruckinjektionssystem |
US8905970B2 (en) | 2008-07-18 | 2014-12-09 | Becton, Dickinson And Company | Dual chamber and gear pump assembly for a high pressure delivery system |
US10314967B2 (en) | 2008-07-18 | 2019-06-11 | Becton, Dickinson And Company | Dual chamber and gear pump assembly for a high pressure delivery system |
DE102010020299A1 (de) | 2010-05-12 | 2011-11-17 | Schwäbische Hüttenwerke Automotive GmbH | Pumpe mit Reibkupplungs-Drehzahlregelung |
DE102010020299B4 (de) * | 2010-05-12 | 2013-05-16 | Schwäbische Hüttenwerke Automotive GmbH | Pumpe mit Reibkupplungs-Drehzahlregelung |
CN102345600A (zh) * | 2010-07-26 | 2012-02-08 | 施韦比施冶金厂汽车有限公司 | 具有抽吸槽的容积泵 |
DE102011013756A1 (de) * | 2011-03-12 | 2012-09-13 | Volkswagen Aktiengesellschaft | Zahnradpumpe mit Verschiebeeinheit zur Einstellung einer Fördermenge |
US9416786B2 (en) | 2012-08-14 | 2016-08-16 | Schwabische Huttenwerke Automotive Gmbh | Rotary pump exhibiting an adjustable delivery volume, in particular for adjusting a coolant pump |
US9735644B2 (en) | 2012-12-11 | 2017-08-15 | Mitsubishi Heavy Industries Automotive Thermal Systems Co., Ltd. | Inverter-integrated electric compressor |
Also Published As
Publication number | Publication date |
---|---|
EP1363025B1 (de) | 2011-07-06 |
DE10222131C5 (de) | 2011-08-11 |
DE10222131A1 (de) | 2003-12-04 |
ES2367969T3 (es) | 2011-11-11 |
EP1363025A3 (de) | 2006-04-19 |
ATE515636T1 (de) | 2011-07-15 |
DE10222131B4 (de) | 2005-05-12 |
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