Hydraulikantrieb für einen druckübersetzer

o hydraulic drive for a pressure intensifier the invention existing for a pressure intensifier of a Hochdruckeindchtung, essentially refers to a hydraulic drive with Mengenund/or Druckregetung of a Motorantdeb with a pump for an argument as well as a control.

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Modern high pressure mechanisms work with pressures up to 10.000 bar and over and make against the materials of the facility component extremely high mechanical demands, which lie often in the frontier of the high-strength alloys regarding mechanical Zugund Wechselfestigkeit. For sudden interruptions of the current of the fluid in the high pressure pipe throughout Fntlastungsventife are in this intended, however a printing increase up to responding the valve can cause material damages.

The desired pressures in the high pressure part are provided by means of Druckübersetz.ers, which work according to the principle of hydraulic pressure intensifiers, like in principle the Fig. 1 to infer is.

A drive of a pressure intensifier is made mostly by a hydraulic part with Mengenund/or pressure control of a hydraulic fluid, which part is essentially formed from a motor drive and a pump part.

For the hydraulic part of a high pressure mechanism an efficient long-term promotion the same, a direct controllability is substantial with disconnections or blockings with an avoidance of positive pressure points as well as a small Pulsation in the high pressure part of the mechanism.

State of the art in accordance with as hydraulic drive for a pressure intensifier piston pumps are usually selected, which exhibit a high power density for high pressures with good volumetric efficiency and good hydraulic-mechanical efficiency with most exact adjustableness of the piston displacement. These pumps are expertly throughout from several parallel units formed basket pumps, those as axial piston machines in EO e *0 D

• • g:: : i: ““.: …”: “qLUe o°° e° gI, Q diagonal axle execution or as Radialkoibenpumpen to be implemented can exhibit and special advantages.

On the one hand this column even adjusting is with hydrostatic/hydmdynamischen loads of axial piston machines, on the other hand exists the possibility of a direct volume control of the fluid by Axwinkelverstellung AntriebfPumpensystem.

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The requirements of the technical progress at the sector high pressure mechanisms accordingly, the security of the system control, the minimization of the pressure surges and thus the minimization of the material overloading of components in the high pressure part, the increase of the life span of the mechanism, the increase of the energy efficiency, the reduction of the current consumption with standing Druckübersetzem as well as the improved function of the HochdruckeJnrichtung, is it task of the invention to create a hydraulic unit for a high pressure translator of the kind initially specified their use the NachteUe while stationary the technology overcomes.

This task with an genericin accordance with-eaten drive for a pressure intensifier of a high pressure mechanism thereby solved that as hydraulic drive essentially a constant delivered flow pump, and/or a pump, which for each revolution promotes a constant volume is used propelled of a servo actuator, soft servo actuator by low pressure-lateral means and/or by high pressure side means electrically controllable, adjustable and/or adjustably is.

Advantages of the HydrauUkantriebes according to invention for a pressure intensifier are present in repeated way. An advantage is to be seen in the fact that essentially no Pulsation does not develop when bringing a high pressure medium into a filler or with the water jet cutting chipping off brittle materials with the Anschießen.

Pressure fluctuations with Einund switching the gumption valve off are kept small by a use of the new Hydrautikantriebes, whereby a Übedastung of the components is avoided to a large extent.

. • .o°, -•“ •• • • ö•. •industrial union •o t a quantity alteration with the withdrawal of high pressure fluid does not require direct plant adaptation.

A gentle approach of the high pressure plant takes place in favorable way under particularly small energy expenditures.

In a further training of the invention as constant delivered flow pump an interior gear pump is used. Interior gear pumps have due to an adapted tooth profile favorable meshing conditions and thus small Volumenstrompulsation with high operating pressures of approximately 300 bar with good efficiency. Such pumps are characterised also by low sound pressure level.

A servo-drive can contain a direct current motor, a synchronous engine or a synchronous motor, thus each kind of electric motor. The distinction is appropriate alone in the control of the engine, which takes place via a closed automatic control loop, which according to invention signals by low pressure-lateral means of the pressure intensifier and/or by high pressure side means of the high pressure mechanism supplyable is.

Configuration-technically and process engineering, in addition, regarding a minimization of the energy consumption it is of advantage, if the servo actuator is designed as frequency-regular driving motor.

On the basis a design a remark way of the invention is to be described below.

It shows Fi, q, 1 schematically a high pressure mechanism with at the output a Förderteitung 3, a Pulsationsdämpfer 31 and a pressure relief valve 32.

A pressure intensifier 2 is supplyable with high pressure fluid over connecting mechanisms 21, as for example low-pressure filter, inlet pressure pump, stop valve.

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• o IL • • •• For example two plungers of exhibiting pressure intensifiers 2 can be movable by a hydraulic unit I with a pump 11 and an engine 12 over a switching block 4 by an argument 10.

A Anspeisung of a pressure intensifier takes place in accordance with the state of the art mostly by means of diagonal axle variable flow pumps with hydraulic-mechanical flow regulating valve with paraltel working Zyfindern, whose delivered flows add themselves.

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In the case of direct, axial adjustment thereby an immediate reduction of the mechanical handling capacity can be achieved by an argument on zero despite an engine rotation.

A Hochdruckeindchtung, as for example a WasserstrahI cutting machine, exhibits mostly longer lasting operating phases, so that a specialist a drive one £) jerk translator by means of a servo actuator and a pump with constant quantity promotion far away from a usual technically favourable solution to appear had.

Surprisingly it showed up that with a hydraulic drive according to invention 1 for a pressure intensifier 2 of a high pressure mechanism a use of a constant delivered flow pump exhibits 11, propelled from a servo actuator 12, VoVeile.

Among other things this is an extremely small Pulsation of a high pressure water steel, which does not cause breaking out also with the Anschießen of a break-through with brittle materials, which in particular by use of an interior gear pump 11 for a hydraulic drive 1 of a pressure intensifier 2 is attainable.

A use of a hydraulic drive according to invention I causes a small Pulsation and in particular small high pressure fluctuations with an Stop/Go enterprise of a plant, whereby further the life span of the high pressure components is increased.

In favourable way no movement takes place with closed high pressure nozzles • • IP o DLL o 'IP •m of the servo actuator and no power input of the same, whereby with a gentle approach of the hydraulic drive 1 the starting power input is reducible.