Abstract:
Eine Vorrichtung zur Energieeinsparung bei hydraulisch betätigbaren Arbeitsgerätschaften (1), mit einer Versorgungseinheit, insbesondere in Form einer Hydraulikpumpe (31) und mit einem Kolbenspeicher (5) mit mindestens zwei in einem Speichergehäuse (7) längs bewegbaren Kolben (9, 11), die über ein Kopplungsteil (13) miteinander verbunden sind, das längsverfahrbar in zumindest einer Trennwand (15) geführt ist, die das Kopplungsteil (13) umgebende Zylinderringräume begrenzt, wobei ein Zylinderraum als Druckbetätigungsraum (19) für die für einen Arbeitsvorgang erforderliche Druckversorgung mit der Arbeitsgerätschaft (1) fluidführend verbunden ist, mindestens ein anderer Zylinderraum (23, 33) über eine Drucksteuereinrichtung (27) mit der Versorgungseinheit (31) verbindbar ist und ein weiterer Zylinderraum einen Druckspeicherraum (17) bildet, ist dadurch gekennzeichnet, dass von den durch die jeweilige Trennwand (15) voneinander getrennten Zylinderräumen, die als Zylinderringräume das Kopplungsteil (13) umgeben, der eine Zylinderringraum als Druckspeicherraum (17) und der andere Zylinderringraum als mit der Arbeitsgerätschaft (1) verbundener Druckbetätigungsraum (19) vorgesehen ist.
Abstract:
A hydraulic system (10) adapted to recover inertial energy is disclosed. The hydraulic system includes a pump (22), a variable displacement pump/motor (28) having an input/output shaft (82), an accumulator (30), and a valve arrangement (32,34,36,38,39,40,42). The valve arrangement is operable in: a) a first mode where the variable displacement pump/motor is driven by the pump to rotate the input/output shaft and the load; b) a second mode where the variable displacement pump/motor uses inertial energy from a deceleration of the load to charge the accumulator; and c) a third mode where the variable displacement pump/motor is driven by the accumulator to rotate the input/output shaft and the load. The hydraulic system also includes a controller (50) for controlling operation of the pump, the variable displacement pump/motor and the valve arrangement.
Abstract:
A device for fluid power recuperation with reduced heat losses and increased efficiency of fluid power recuperation combined with better manufacturability and possibility of using off-the-shelf gas receivers (bottles). The device comprises at least on hydropneumatic accumulator (1), containing in its shell a fluid port (2) communicating with the fluid reservoir (3) of the accumulator separated from the gas reservoir of the accumulator by a movable separator (4). The gas reservoir (5) of the accumulator communicates via a gas port (6) with at least one gas receiver (9) containing a regenerating heat exchanger (10) made in the form of a metal porous structure. The aggregate volume of the material of the regenerating heat exchanger is in the range of 10 to 50 % of the internal receiver volume and the aggregate area of the heat exchange surfaces of the regenerating heat exchanger reduced to the aggregate internal receiver volume exceeds 2000 cm2 /liter.
Abstract:
Die Erfindung betrifft eine Anordnung zur kolbenstangenseitigen Abdichtung eines Geberzylinders, insbesondere eines hydraulisch betätigten Kupplungs- oder Bremssystems, bei der die mit dem Kolben des Geberzylinders verbundene Kolbenstange in Bezug auf das Gehäuse des Geberzylinders durch eine faltenbalgartige Abdichtung vor dem Eindringen von Schmutz in den Geberzylinder geschützt ist. Die Abdichtung umfasst ein erstes relativ elastisches Dichtungsbauteil und ein zweites, relativ unelastisches Dichtungsbauteil, wobei das erste Dichtungsbauteil einerseits dicht mit dem Gehäuse des Geberzylinders und andererseits dicht mit dem zweiten Dichtungsbauteil in Verbindung steht und wobei das zweite Dichtungsbauteil dicht auf der Kolbenstange angeordnet und auf dieser verschiebbar ist.
Abstract:
A method for estimating a fluid charge of a hydraulic accumulator includes determining a first accumulator pressure at a first time with a pressure sensor, the first time during accumulator charging; determining a second accumulator pressure at a second time with the pressure sensor (296), the second time during accumulator charging; determining a first fan speed at the first time; determining a second fan speed at the second time; and estimating the fluid charge of the hydraulic accumulator as a function of the first accumulator pressure, the second accumulator pressure, the first fan speed, and the second fan speed.
Abstract:
An energy storage system includes a main container (1) to which water can be pumped, an auxiliary container (2) that contains a prescribed material, e.g. carbon dioxide, in both liquid and gaseous form, a line (8) connecting the auxiliary container (2) to the main container (1 ) so that there is gaseous prescribed material in the upper part of the main container (1), a barrier separating the gaseous prescribed material in the main container (1) from the water in the main container (1) and means permitting the discharge of water under pressure from the main container (1) so as to operate a turbine and generator (3).
Abstract:
The invention relates to a switchable device for supplying at least one consumer of an internal combustion engine with pressure. The device comprises the following: a housing having a housing interior; a displacement element arranged in the housing, which element can be displaced between a first end position and a second end position, the displacement element having a pressure surface which at least partially delimits a fluidically connectible accumulator chamber together with the wall of the housing interior, the accumulator chamber being connectible to a pressure source in a fluid-conducting manner; an energy accumulator which interacts with the displacement element, the displacement element being displaceable against the force of the energy accumulator from the first end position into the second end position under the effect of pressure applied to the accumulator chamber; a locking mechanism by virtue of which the displacement element can be locked in the second end position; a switching mechanism which can be actuated by an actuator, has a switch element that can be brought into at least two switching positions and interacts with the locking mechanism in such a manner that the displacement element can be locked and unlocked in a first switching position of the switch element and cannot be locked and not unlocked in a second switching position of the switch element.
Abstract:
An energy storage system (10) includes a reservoir (14) defining an interior chamber (66), a collapsible bladder (70) positioned within the interior chamber and having working fluid therein, a one-way valve (82) in fluid communication with the interior chamber and operable to permit entry of replacement air into the interior chamber as working fluid exits the bladder, a reversible pump/motor (22) in fluid communication with the bladder, and an accumulator (18) containing working fluid and gas. The accumulator is in selective fluid communication with the reversible pump/motor to deliver pressurized working fluid to the reversible pump/motor when operating as a motor, and to receive pressurized working fluid discharged by the reversible pump/motor when operating as a pump.