• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for operating a hydraulic high-pressure system with a pressure booster (2) which can be acted upon by a hydraulic unit (1) to pressurize a consumer (8) with hydraulic fluid and with at least one pressure accumulator (9) connected to the pressure booster (2) as a pulsation damper in that the operating pressure (12) of the hydraulic fluid for the consumer (8) is controlled by the hydraulic unit (1). In order to save energy, it is proposed that the pressure accumulator (9) is blocked from changing the operating pressure (12) applied to the load (8) and is only opened again when the operating pressure (12) of the hydraulic fluid is raised or lowered.
    公开号:AT516738A4
    申请号:T50138/2015
    申请日:2015-02-23
    公开日:2016-08-15
    发明作者:Reinhard Ing Gruber；Franz Schachner
    申请人:Reinhard Ing Gruber；Franz Schachner；
    IPC主号:
    专利说明:

    (40198) II
    The invention relates to a method for operating a hydraulic high pressure system with a pressurizable by a hydraulic unit pressure intensifier for acting on a consumer with hydraulic fluid and at least one connected to the pressure booster pressure accumulator as Pulsationsdämpfer, wherein the operating pressure of the hydraulic fluid for the consumer controlled by the hydraulic unit, in particular, is regulated, as well as on a hydraulic high-pressure system for carrying out the method.
    Hydraulic high-pressure systems, such as those used for the supply of water jet cutting heads, have a connected to a hydraulic unit pressure booster, which is acted upon by the pre-pressure of the hydraulic unit, and a corresponding hydraulic means hochspannt. Since the pressure booster is a double-acting piston pump or a plunger pump, caused by the piston strokes, unavoidable pressure fluctuations are attenuated, especially at high operating pressures, which is performed by means of pressure accumulators, which are connected to the pressure booster. If the consumer demands a hydraulic fluid supply with different pressure levels, then this requirement can be fulfilled by a corresponding control of the admission pressure with which the pressure booster is acted upon by the hydraulic unit. With a reduction in the operating pressure with which the hydraulic fluid is supplied to the consumer, the pressure in the pressure accumulator falls with the result that when re-raising the operating pressure, the pressure in the pressure accumulator must first be raised before the full operating pressure is applied to the consumer. This not only means a loss of time, but also an additional energy requirement for loading the pressure accumulator to the required pressure level.
    The invention is therefore based on the object, a method for operating a hydraulic high-pressure system in such a way that in a short time different consumer requirements with respect to the operating pressure of the hydraulic fluid can be met with a relatively low energy consumption.
    Based on a method of the type described, the invention solves the problem by the fact that the pressure accumulator is locked before a change, especially before lowering or lifting, the voltage applied to the consumer operating pressure and only when lifting or lowering the operating pressure of the hydraulic fluid is opened again ,
    By blocking the pressure accumulator, the pressure energy is stored in the pressure accumulator, while the load applied to the load operating pressure is lowered by an appropriate control of the hydraulic unit. Since the pressure accumulator is only connected to the pressure booster again when the operating pressure has risen, it requires little additional energy to charge the pressure accumulator. This is especially true in the event that the pressure accumulator is only connected to the pressure booster when the operating pressure of the hydraulic fluid has been at least approximately equalized to the pressure accumulator pressure, in particular raised or lowered. The blocking of the accumulator with decreasing operating pressure does not mean that when increasing the operating pressure of the pressure accumulator must be charged forcibly. To save charging energy, the accumulator can be locked even with an increase in the required operating pressure, so that, for example, in a short-term increase in operating pressure or at an operating pressure above the nominal pressure of the pressure accumulator this is blocked.
    Due to the fact that the loading volume of the pressure accumulator is considerably larger than the hydraulic fluid volume in the hydraulic supply network between the pressure booster and the consumer, the time required to increase the operating pressure compared to the prior art can be kept short, because the need for recharging the Druckspei chers deleted. However, the lack of pulsation damping that is lacking when the pressure accumulator is blocked must be taken into account, which hardly plays a role, especially at lower operating pressures and shorter intervals of reduced operating pressure. If the lack of pulsation damping interferes with, several pressure accumulators can be provided as pulsation dampers with different pressure levels, which are blocked depending on the course of the operating pressure of the hydraulic fluid or connected to the pressure booster, so that a pulsation damping without pressure losses is ensured for the individual pressure levels predetermined by the pressure accumulators can because the other accumulators are locked.
    For carrying out the method, it can be advantageously assumed that a hydraulic high-pressure system for supplying a consumer with a pressurized booster which can be acted upon by a controllable hydraulic unit and with at least one pressure accumulator connected to the pressure booster. In such a high-pressure system, it only needs to be provided that the pressure accumulator can be blocked and opened by a control device as a function of the course of the operating pressure of the hydraulic medium applied to the load in order to be able to disconnect the pressure accumulator from the supply network when lowering the operating pressure in the supply network for the consumer ,
    With the provision of multiple pressure accumulator with different pressure levels, the pulsation damping in the hydraulic supply network can be ensured even at lower operating pressures when the pressure accumulator can be individually connected to the pressure booster in dependence on the operating pressure of the hydraulic fluid via the control device and therefore allow the pulsation damping at the respective pressure level.
    Reference to the drawing, the inventive method is explained in detail. Show it
    1 is a hydraulic high pressure system according to the invention in a schematic block diagram,
    1 shows a representation of a variant of an inventive hydraulic high-pressure system, and FIG. 3 shows an assumed time profile of the operating pressure applied to the consumer and the pressure in the pressure accumulator.
    The hydraulic high-pressure system according to FIG. 1 comprises a hydraulic unit 1, with the aid of which a pressure booster 2 can be charged with a corresponding admission pressure. This pressure booster 2 has a double-acting piston pump 3, optionally a plunger pump, which is connected on the suction side via check valves 4 to a hydraulic line 5, for example a water pipe, and the pressure side via check valves 6 to a supply network 7 for a consumer 8. In order to dampen the pressure pulsations caused by the piston pump 3, the pressure booster 2 is connected to a pressure accumulator 9, which can be blocked by check valves 10 and taken from the supply network 7.
    If the consumer 8 different operating pressures of the hydraulic fluid through the supply network 7 are provided, the hydraulic unit 1 is controlled accordingly by a control device 11, so that the pressure booster 2 is subjected to a required for the required operating pressure form. Depending on the course of the operating pressure in the supply network 7, the blocking valves 10 are actuated by the control device 11 in order to lock the pressure accumulator 9 if necessary.
    In Fig. 3, in which the abscissa of the time t and the ordinate are assigned to the pressure p, a possible time course of the required operating pressure 12 in the supply network 7 is shown in solid lines. Since the check valves 10 are initially open, the pressure accumulator 9 is charged with the operating pressure 12 rising at the instant ti, as can be seen from the course of the accumulator pressure 13 shown by dashed lines. In order not to have to apply the energy for charging the pressure accumulator 9 at egg ner short-term increase in the operating pressure 12, the check valves 10 are closed via the controller 11 before this increase in the operating pressure 12 at time t2, so that the pressure energy is stored in the pressure accumulator 9, and although during a time interval between t3 and t4, in which the operating pressure 12 falls below the pressure level of the pressure accumulator 9. Only when the operating pressure 12 again approaches the accumulator pressure 13 at the time t4, the check valves 10 are opened. Consequently, for the increase in the operating pressure 13 to the pressure level of the accumulator 9, only the hydraulic volume in the supply network 7 that is small compared to the pressure accumulator 9 must be taken into account.
    The embodiment of FIG. 2 differs from a hydraulic high-pressure system according to FIG. 1 essentially only in that the pressure accumulator 9 is connected via a branch line to the supply network 7, so that it locks only the accumulator 9 of a check valve 10 in the Stub line required. In FIG. 2, however, additional dash-dotted lines indicate that two or more pressure accumulators 9 may be provided with different pressure levels, of which only one is used when the operating pressure in the supply network 7 corresponds to the pressure level in the respective pressure accumulator.
    权利要求:
    Claims (5)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. Karl Winfried Hellmich Spittelwiese 4, 4020 Linz (40198) II Claims
    1. A method for operating a hydraulic high pressure system with a by a hydraulic unit (1) acted upon pressure booster (2) for applying a load (8) with hydraulic fluid and at least one of the pressure booster (2) connected pressure accumulator (9) as a pulsation damper, wherein the Operating pressure (7) of the hydraulic fluid for the consumer (8) controlled by the hydraulic unit (1), in particular regulated, is characterized in that the pressure accumulator (9) before a change, in particular before lowering or lifting, of the consumer ( 8) applied operating pressure (12) is blocked and only when lifting or lowering the operating pressure of the hydraulic fluid is opened again.
    [2]
    2. The method according to claim 1, characterized in that the pressure accumulator (9) is again connected to the pressure booster (2) when the operating pressure (12) of the hydraulic fluid at least approximately equalized to the pressure accumulator pressure (13), in particular raised or lowered, has been.
    [3]
    3. The method according to claim 1 or 2, characterized in that a plurality of pressure accumulator (9) are provided as pulsation damper with different pressure levels, which are blocked in dependence on the course of the operating pressure (12) of the hydraulic fluid or connected to the pressure booster (2).
    [4]
    4. High-pressure hydraulic system for supplying a consumer (8) with a controllable by a controllable, in particular controllable hydraulic unit (1) acted upon pressure booster (2) and with at least one to the pressure booster (2) connected pressure accumulator (9) as a pulsation damper, characterized the pressure accumulator (9) can be blocked and opened by a control device (11) as a function of the course of the operating pressure (12) of the hydraulic medium applied to the consumer (8).
    [5]
    5. High-pressure hydraulic system according to claim 4, characterized in that a plurality of pressure accumulator (9) provided with different pressure levels and depending on the operating pressure (12) of the hydraulic fluid via the control device (11) individually to the pressure booster (2) can be connected.
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    EP3059458A1|2016-08-24|
    HUE050841T2|2021-01-28|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1149615B|1956-09-29|1963-05-30|Bosch Gmbh Robert|Hydraulic power transmission system with pressure accumulator|
    DE2745276A1|1976-10-28|1978-05-03|Welko Ind Spa|HYDRAULIC DEVICE FOR SUPPLYING A LIQUID AT TWO DIFFERENT PRESSURES|
    US4659294A|1985-01-09|1987-04-21|Eimco Secoma, Societe Anonyme|Hydrualic pressure amplifier|
    WO2004111452A1|2003-06-13|2004-12-23|Dietmar Kaiser Ag|High-pressure pump|
    EP2610490A2|2011-12-30|2013-07-03|BHDT GmbH|Hydraulic drive for a pressure tranducer|
    EP2818731A1|2013-06-28|2014-12-31|Valmet Technologies, Inc.|A hydraulic force transmission system, fiber web machine and method of operating a hydraulic force transmission system|
    CA1006787A|1973-01-12|1977-03-15|John H. Olsen|High pressure fluid intensifier and method|
    DE19758159C2|1997-01-04|1999-12-09|Heinrich Van De Loecht|Linear drive with integrated pneumohydraulic pressure intensifier|
    US6854269B2|2002-07-23|2005-02-15|Caterpillar Inc.|Noise attenuation in a hydraulic circuit|
    GB0419915D0|2004-09-08|2004-10-13|Des Enhanced Recovery Ltd|Apparatus and method|
    DE102015104245B3|2015-03-20|2016-07-21|Thyssenkrupp Ag|Apparatus and method for cutting a material to be cut by means of a fluid|AT519687A1|2017-03-01|2018-09-15|Bft Gmbh|Fluid jet or water jet cutter|
    CN108591001B|2018-05-18|2019-12-31|高军|Hydraulically-driven high-pressure grouting pump|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50138/2015A|AT516738B1|2015-02-23|2015-02-23|Method and device for operating a hydraulic high pressure system|ATA50138/2015A| AT516738B1|2015-02-23|2015-02-23|Method and device for operating a hydraulic high pressure system|
    PL16156698T| PL3059458T3|2015-02-23|2016-02-22|Method and device for operating a hydraulic high pressure system|
    ES16156698T| ES2800175T3|2015-02-23|2016-02-22|Procedure and device for operating a high-pressure hydraulic system|
    HUE16156698A| HUE050841T2|2015-02-23|2016-02-22|Method and device for operating a hydraulic high pressure system|
    SI201630784T| SI3059458T1|2015-02-23|2016-02-22|Method and device for operating a hydraulic high pressure system|
    EP16156698.9A| EP3059458B1|2015-02-23|2016-02-22|Method and device for operating a hydraulic high pressure system|
    HRP20201109TT| HRP20201109T1|2015-02-23|2020-07-15|Method and device for operating a hydraulic high pressure system|
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