Abstract:
A combined oil tank and oil accumulator vessel (1) having an internal chamber, and a moveable spring-loaded barrier (3) within the internal chamber defining a low pressure oil tank portion (10) and a high pressure accumulator portion (14) separated by the moveable barrier (3). The combined oil tank/accumulator provides the advantages of more consistent oil flow supply as a result of the integral accumulator, but with reduced weight, reduced oil volume requirements, and constant oil levels when compared with conventional external accumulators.
Abstract:
2. Bei einem Druckspeicher mit einer innerhalb eines Speichergehäuses 1 längs verfahrbaren, aus Hauptkolben 17 und relativ zu diesem bewegbarem Hilfskolben 19 gebildeten Kolbenanordnung, die eine Fluidseite 25 des Speichers von seiner Gasseite 23 über eine Dichteinrichtung abdichtend trennt, welch letztere ein Trennmittel 43 mit Tiefenfiltrationseigenschaft, weitere Dichtelemente 47 sowie eine an die Innenwand des Speichergehäuses 1 angrenzende Kammer 35, 39 für ein strömungsfähiges Dichtmedium aufweist, das durch den Hilfskolben 19 vorspannbar ist, der für eine das Volumen der Kammer 35, 39 verkleinernde Relativbewegung mit dem Druck der Gasseite 23 und der Kraft eines Kraftspeichers 33 beaufschlagt ist, ist der Hilfskolben 19 vollständig integriert in einer zur Gasseite 23 offenen Führung 21 des Hauptkolbens 17 geführt, in welchem mittels des Hilfskolbens 19 ein Raum 35 einschließbar ist, der Teil der das strömungsfähige Dichtmedium aufnehmenden Kammer 35, 39 bildet.
Abstract:
For a hydraulically actuated device a hydraulic power cylinder (30) with an actuator (14) slidably received for reciprocation within the cylinder (30) and a piston (68) slidably received for reciprocation within a sleeve (54) of the actuator (14) and defining a gas chamber(66) on one side of the piston (68) and a hydraulic fluid chamber (48) on the other side of the piston (68) so that the maximum pressure in the hydraulic fluid chamber (48) is limited as a function of the force of compressed gas in the gas chamber (66) acting on the piston (68). In this way, the maximum system pressure is a function of and substantially corresponds to the pressure of the compressed gas within the gas chamber (66) and acting on the piston (68). Desirably, the pressure of the compressed gas in the gas chamber (66) can be readily changed to change the maximum hydraulic fluid pressure.
Abstract:
The invention relates to a hydro-store with a storage casing (10) in which two partial chambers for media to be separated from each other are formed by a separating diaphragm. Because there is at least one other separating diaphragm (22, 24) in the storage casing (10) arranged in such a way that the number of partial chambers (30, 32, 34) formed is at least one greater than that of the separating diaphragms (22, 24) and/or these partial chambers (30, 32, 34) are formed by at least one storage bubble which is sealed to the storage casing (10) along its outer periphery, the hydro-store has a wider field of application than prior-art types. It is in particular possible with the multi-chamber hydro-store of the invention to store energy more favourably for the same size than in a conventional store with only one separating diaphragm.
Abstract:
An energy accumulator unit (1) according to the invention is apt for receiving energy from an external source (2) and for delivering it to a utilization system (3). The energy exchanges occurring between said source (2) and said system (3) take place by means of a pressure fluid. The unit (1) comprises at least one hydraulic cylinder (4) which presents a casing (5) and a piston (6) defining a chamber (7) for the fluid, with having control means (8) intended for controlling the feed of fluid into and the discharge of fluid from said chamber, and an elastic system (13) that is connected to the casing (5) and to the piston (8) in such a way as to be deformable as a result of movement of said piston (6) with respect to said casing (5).
Abstract:
One embodiment provides a reservoir tank, including: a reservoir main body having a reserving chamber which reserves a hydraulic fluid, a hydraulic fluid pouring port which is provided at an upper portion of the reservoir main body, and a hydraulic fluid supply port which is provided at a lower portion of the reservoir main body. A groove-like recess portion is formed on a bottom surface of the reservoir main body. As in a projection in which the hydraulic fluid pouring port is projected onto a bottom surface side of the reservoir main body, the recess portion is disposed between the hydraulic fluid pouring port and the hydraulic fluid supply port.
Abstract:
A stretching system for stretch-blow molding machines for stretch blow molding containers from preforms, having at least one stretching unit which is hydraulically actuated for stretching a preform, with a hydraulic pressure tank which is at least partially filled with a hydraulic medium, for example water, and which is at least partially filled with a gaseous medium, for example compressed air; and wherein the stretching unit includes a stretching cylinder and a stretching piston, the stretching system being designed to conduct the hydraulic medium out of the hydraulic pressure tank to the stretching cylinder of the stretching unit, whereby the stretching piston in the stretching cylinder can be moved hydraulically.
Abstract:
The invention relates to a method of using new flushing ports (IA7 IB) when cleaning a piston accumulator (7). Dirty hydraulic oil is returned out via the main port (2) and a return passage (9) until a cleanness grade has been reached. Clean hydraulic oil is forced into the piston accumulator (7) via the axial bores (3A, B) of the flushing ports (IA, B) and further in sloping bores (3C, D), bringing the hydraulic oil into the volume (8) in an upward, tangential direction below the piston (5), into a flushing circulation. By reducing the gas pressure on the gas side (4) of the piston (5) in relation to flushing pressure input from a valve (6), a volume (8) is created on the oil side between the piston (5) and the end bottom (3). The return passage (9) is closed and the piston (5) is brought into its upper position, so that an internal cylinder wall (10) is cleaned. Upon pressure build-up, the return passage (9) is opened, and the piston (5) returns to its end position on the oil side while the supply of clean hydraulic oil is maintained, and the operation is repeated until a cleanness grade has been achieved.
Abstract:
A method for providing a controlled force to a dynamic system includes applying a force to a first actuator, transmitting the force from the first actuator to a second actuator through a closed fluid path containing a captured volume of fluid, and providing, via the second actuator, a controlled force to the dynamic system.
Abstract:
A hydraulic pulsation damper system for installation into an otherwise rigid hydraulic system to absorb and extinguish pressure pulsations being transmitted through the system by hydraulic fluid contained therein. The system is useful in suppressing pulsations in automotive fuel lines supplying fuel to fuel injection systems. The system includes fuel-conducting tubing made of flexible, non-permeable material that includes a convoluted central portion capable of expanding and contracting in response to pulsations in the fuel. Resilient foam is molded around the convoluted portion for controlling expansion of the convolutions. The foam and convoluted tubing are contained within a housing made from a larger-diameter hose having ends sealed as by swaged connectors. The damper system may be bent to accommodate installation with a fuel line in an engine and can conveniently provide a sound-deadening link in the fuel line of a vehicle between a body-mounted portion and an engine-mounted portion thereof.