Hydraulikantrieb für einen Druckübersetzer

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[0001] The invention relates to a hydraulic drive for a pressure intensifier in a fluid- high pressure mechanism , in particular for an installation for water jet cutting, consisting essentially of a hydraulic pump, which promotes a constant volume of working fluid per revolution, driven by an electric servo drive, operatively connected by means of measuring signals [...] /or with a switchable power supply.

[0002] hydraulic drives for pressure transformer, are driven with a variable servo drive, are State of the Art.

[0003] 512,322 B1 is, for example, a hydraulic drive disclosed in the AT, with a controllable servo drive having a constant-delivery flow-pump, comprises, through which by means of a pump having a two plunger switching block Constant-delivery flow-can be acted upon with working fluid pressure intensifier.

[0004] Aworking piston surfaces with a working fluid acting upon the respective switching a line, which as a rule is provided with a pressure of about 300 bar from the pump is effected, as outlined above, or by means of a switching block. switching block.

[0005] A switch block for alternately acting upon the pressure booster is on the one hand a high structural expense working piston surfaces of the face and is, on the other hand, in particular during changing over of the pressurized working fluid in the hydraulic high pressure system bring shocks, which thereby causes a superimposed mechanical point demand of the parts in addition to the static levels.

[0006] Let the invention, a hydraulic drive for a pressure transformer to create a fluid- high pressure mechanism of the type named above, which leads to small pressure variation in the high pressure system, so the tips of the reduced and higher security guaranteed material loads , as well as the simplified and economic benefits has plant conception.

[0007] This object is achieved in that the servo drive bidirectionally, therefore as a reversible motor is reversible and so acting upon the pressure booster with working fluid formed, wherein the electrical supply of the switching parameters [...] /or a control of the on signals from measuring devices of pressure and/or pressure profile of the servo drive and/or pressure and/or pressure profile of the high pressure fluid of the working fluid and/or of the position of the plunger in the pressure transformer and at least one conveying means for the working fluid in the system is based has a heat exchanger.

[0008] advantages achieved with the invention are in particular given The that an alternative application of the respective working piston surface of a pressure booster with working fluid directly from a hydraulic pump with constant- volume promotion per revolution, bidirectionally driven by a servo drive, takes place.

[0009] A State of the Art switching block according to the switching of a pressurized working fluid by means of a, which, by its very nature, can cause blows, in each case a gentle build-up of pressure in the working fluid is thus bypassed and on start-up of a servo drive according to the invention in the milliseconds or low time periods accomplished.

[0010] As additional advantage is the simplicity of the mechanical design, the high operational safety and viability of this type of high pressure arrangements seen.

[0011] it is achieved according to the invention advantageous embodiment of the inventive drive for a pressure transformer A, when in the region of the line of the working fluid between hydraulic pump and/or in the area of a pressure converter and at least one heat exchanger in the guide means, and/or providing in a vessel in the vessel for adjusting the temperature of the working fluid is positioned.

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[0012] Such may, for a heavy operation of a pressure booster is possible to regulate or optimum temperatures of the working fluid desired.

If according to the invention or said directing means. Lines between hydraulic pump and hydraulic actuator means for feeding working fluid into the system of the pressure transformer, have in each case, can in each case be at a return of working fluid from the pressure intensifier for hydraulic pump are adjusted in this a slight excess pressure from the environment. This optimum starting conditions for the pressure side of the hydraulic actuator or of the pump are adjustable in each case. 0a about 5bar have positive pressure values of Slight, optionally for preventing a gas formation, proved its worth.

[0013] examples of the invention, and are shown in the drawings represent remark way thereof which allow only a are described below.

[0014] Shown

[0015] a hydraulic drive with means for feeding working fluid of a pressure booster 1 Fig. in the system with heat exchanger

[0016] a hydraulic drive for a pressure transformer with heat exchanger in the region of the 2 Fig. line of the working fluid

[0017] To facilitate the association of the parts and components in the representations is to serve the subsequent Explanation of the symbols.

1 hydraulic drive

10 working fluid

11 pump

12 electric servo drive

13 low-pressure transducer

14 high pressure transducer

15 Electrical supply and control

16 plunger way investigator

2 pressure transformer

21 supply device for high pressure fluid

3 high-pressure line

31 pulsation damper

32 pressure relief valve

4 feeding plant of working fluid

40 drive motor of the loading pump

41 feed means with check valve

42 feed means with check valve

5 heat exchanger in the feeding plant

51 supply container heat exchanger in the

52 heat exchanger in the conducting means

53 heat exchanger in the conducting means

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[0018] with a hydraulic drive 1 shows a fluid- high pressure mechanism Fig. 1 for a pressure transformer 2.

[0019] 12 by a servo drive 11 is constant-delivery flow-pump A can be driven. A controlled supply 15 of the servomotor 12 regulates its rotation parameters and its stoppage.

[0020] Using low pressure transducer 14 and/or 13 and/or high pressure transducer 16 from the pressure transformer is plunger lift investigator 2 and 10 of the pump 11 the motor operation and thus such the promotion of working fluid acting upon the respective 2 working piston surface of the pressure booster a program-controlled manner.

[0021] 10 for example, has a loading pump feeding plant 4 for working fluid with a A 40 on drive motor, via check valves 41, 42 with the respective baffle means 11 and pressure transformer is connected between the hydraulic pump 2.

[0022] a heat exchanger according to the invention on 4 points feeding plant Such 5, by means of which the temperature of the working fluid can be adjusted in the 10 supply container.

[0023] 2 shows essentially parts of a hydraulic actuator 1 for a pressure transformer Fig. 2 of Fig. 1.

[0024] 10 a different embodiment according to the invention is for a cooling of the working fluid, however, represented.

[0025] 10 51 for the working fluid in the region of a supply container A heat exchanger can be arranged and/or said directing means from the hydraulic pump 2 each have a heat exchanger 11 for pressure transformer 52, 53 on.