Abstract:
A system for storing energy includes a body and a shaft having walls defining an internal volume for containing a fluid, a seal member disposed between the body and the walls of the shaft, and a fluid passage in fluid communication with the shaft. The body is disposed within the internal volume of the shaft for movement with gravity from a first elevation position to a second elevation position within the internal volume of the shaft. The seal member divides the internal volume into a first portion located below the body and a second portion located above the body. The fluid passage communicates fluid with the first portion of the interior volume of the shaft. The system further includes a pump/turbine operatively coupled with the fluid passage to drive a motor/generator to generate electricity upon movement of the body from the first elevation position to the second elevation position.
Abstract:
A lightweight, low permeation, piston-in-sleeve high-pressure accumulator is provided. The accumulator includes a cylindrical composite pressure vessel with two integral rounded ends. A piston slidably disposed in a thin nonpermeable internal sleeve in the accumulator separates two chambers, one adapted for containing a working fluid and the other adapted for containing gas under pressure. Working fluid is provided in a volume between the nonpermeable internal sleeve and the composite pressure vessel wall. Further means are provided for withstanding harmful effects of radial flexing of the composite vessel wall under high pressures, and from stresses present in use in mobile applications such as with a hydraulic power system for a hydraulic hybrid motor vehicle. A method for pre-charging the device is also presented.
Abstract:
Die Erfindung bezieht sich auf einen Fluid-Linearantrieb mit einem ganz oder teilweise mit einem Druckmittel gefüllten Zylinder (1), in dem ein Kolben (2) mit einer einseitig an dem Kolben (2) angeordneten und abgedichtet aus dem Zylinder (1) herausgeführten Kolbenstange 10 verschiebbar angeordnet ist und den Zylinderinnenraum in eine erste Kammer (6) und in eine zweite Kammer (7) unterteilt. Dabei ist die Kolbenstange (10) durch die zweite Kammer (7) hindurchgeführt. Eine, insbesondere reversierbare, Pumpe (17), durch die das Druckmittel in die erste Kammer (6) hinein- und aus der ersten Kammer (6) herauspumpbar ist, besitzt einen ersten Saug- und/oder Druckanschluß (18) und einen zweiten Saug- und/oder Druckanschluß (19). Der erste Saug- und/oder Druckanschluß der Pumpe (17) ist mit der ersten Kammer (6) und der zweite Saug- und/oder Druckanschluß mit einer Speicherkammer verbunden. Zudem ist die Pumpe (17) in dem Kolben (2) oder in oder an einem Boden der ersten Kammer angeordnet.
Abstract:
Ein Hydrospeicher weist auf: a) ein Speichergehäuse (1) aus nicht-magnetisierbarem Werkstoff, das eine Axialrichtung des Gehäuses definiert, b) ein im Speichergehäuse (1) axial bewegbares Trennelement (9), das im Speichergehäuse (1) zwei Arbeitsräume (5, 7) voneinander trennt, c) eine am Trennelement angeordnete, ein Feld erzeugende Magnetanordnung (29) und d) eine an der Auβenseite des Speichergehäuses (1) angeordnete, sich längs der Bahn der Axialbewegung des Trennelementes (9) erstrekkende Reihe von Magnetfeldsensoren (35), die auf das Feld der Magnetanordnung (29) am Trennelement (9) ansprechen, um dessen Position entlang der Reihe von Magnetfeldsensoren (35) zu kennzeichnen.
Abstract:
The invention relates to a vehicle braking system comprising a gas hydraulic accumulator (10) with a housing (12), whose interior is divided by metal bellows (16) into a gas-filled gas chamber (20) and a fluid chamber (22). A pressurised fluid can be supplied to and conveyed from said fluid chamber (22) via a supply line (24). A valve assembly (74) is provided between the fluid chamber (22) and the supply line (24), which closes if the pressure in the supply line (24) falls below a minimum value and opens if the pressure exceeds said minimum value. In to order to increase the operating security of the gas hydraulic accumulator (10), the valve assembly (74) closes if the pressure in the supply line (24) exceeds a maximum value and opens if the pressure falls below said maximum value.
Abstract:
The invention relates to an electronically controlled brake system comprising a traction control system (TCS) and/or an electronic stability program (ESP), an actuating unit (26), wheel brakes (27), and a control unit (28). Said control unit is situated between the actuating unit (26) and the wheel brakes (27). The control unit (28) comprises at least one pump (29) having a suction side (30) and a delivery side (31). The control unit also has a TCS or ESP change-over valve (32) situated between the suction side (30) of the pump (29) and the actuating unit (26). A reservoir (34) is arranged between the change-over valve (32) and the suction side (30) of the pump (29), and at least one check valve (7, 8) is provided on the suction side (30) of the pump (29). In order to further optimize such brake systems, the check valve (7, 8) is provided on the reservoir (34).
Abstract:
The invention relates to an accumulator (1) with a large volume inner space (3), especially an adjustable low pressure accumulator, in which a device (11) which separates the fluid area from the gas area is provided. Said device (11) contains submerging floating bodies (17, 19) arranged on the upper surface of the fluid volume (33) and are in the fluid level (35) itself. In addition, the separating device (11) contains at least one protecting body (21) which interacts with the floating bodies (17, 19) and is configured as a shield for further reduction of the contact surface between gas and fluid. The protecting body (21) and the floating bodies (17, 19) are constructed in such a way that they can be mounted inside the inner space (3) of the accumulator (1) through an inspection opening (9).
Abstract:
A multifunction pressure accumulator (21) comprised of a pressure-proof reservoir having at least two pressure connections (4, 10) and at least two leak-proof partition walls (2, 5) moving or flexing due to pressures conveyed to the reservoir and a pressure chamber formed by means of said partition walls and filled with gas. For filling of pressure chamber (13) the gas filling channel (14) is taken to the pressure chamber side at least through one partition wall.
Abstract:
For sealing between two opposed surfaces of two machine elements (1, 2) a combination seal is provided to be fitted into an open groove (3) in one of the machine elements (2). The seal comprises an elastomeric expansion ring (4, 5) at the bottom of the groove (3), an intermediate ring (6) made of a viscous-elastic material, e.g. PTFE and having a sealing surface (6b) to contact the mating machine element (2), and an elastomeric outer ring (8) fitted into a separate groove (7) in the sealing surface (6b) of the intermediate ring. Especially in cases where the seal is to separate fluid and gas an improved distribution of the contact pressure at the sealing surface (6b) and also an effective hydrodynamic relief of the outer ring (8) preventing its exposure to injurious pressures and subsequent damage is obtained by designing the intermediate ring (6) at the ends of the sealing surface (6b) with comparatively sharp corners (16, 17), the parts of the sealing surface between these corners and the separate groove (7) forming conical faces (14, 15) which at a narrow slit angle converge towards the separate groove (7). The intermediate ring may also be biassed by the two expansion rings (4, 5) placed on each side of the separate groove (7).