Abstract:
Rechargement automatique de la capacité gaz d'un accumulateur hydropneumatique. Des moyens de réajustement (20) de la charge de la capacité gaz (13) comprenant une source de gaz sous pression (22) reliée par un circuit pneumatique (24) à une valve de chargement (17) et une vanne de réinjection (26) commandée par une unité de calcul (27) d'un cycle de réinjection de gaz dans la capacité gaz.
Abstract:
Изобретение относится к машиностроению и может быть использовано для рекуперации гидравлической энергии в гидросистемах. Задачей изобретения является создание устройства для рекуперации гидравлической энергии с высокой эффективностью в широком диапазоне длительностей циклов рекуперации. Для решения поставленной задачи предлагается устройство для рекуперации гидравлической энергии со средствами усиления теплообмена, содержащее газохранилище, включающее газовый и жидкостной резервуары переменного объема, отделенные подвижным разделителем с возможностью сжатия газа в газовом резервуаре при нагнетании жидкости в жидкостный резервуар и расширения газа при вытеснении жидкости из указанного жидкостного резервуара, а также средства усиления теплообмена, выполненные с возможностью усиливать отвод тепла от газа при сжатии его в одном газовом резервуаре и усиливать подвод тепла к газу при расширении его в этом газовом резервуаре причем средства усиления теплообмена включают, по меньшей мере, одну газодувку, установленную с возможностью создания вынужденной циркуляции газа по меньшей мере в одном газовом резервуаре.
Abstract:
Die Erfindung betrifft einen Blasenspeicher mit einem Gehäuse (4), in welchem eine Blase (5) angeordnet ist. Um einen Blasenspeicher zu schaffen, der einfach aufgebaut und kostengünstig herstellbar ist, weist die Blase (5) mindestens einen vorbestimmten Verformungsbereich auf, in dem sich die Blase (5) im Betrieb des Blasenspeichers (1) definiert verformt.
Abstract:
An accumulator membrane unit (2) for inclusion into an accumulator chamber (6) in an accumulator (1) for storing hydraulic energy under pressure. The accumulator membrane unit includes membrane elements (3) that are sealingly joined at their peripheries and limit an inside membrane volume (V) which varies in dependence of a pressure at an outside of the accumulator membrane unit. The invention also concerns an accumulator, a method and a rock drilling machine.
Abstract:
An apparatus for determining the weight of a payload (44) in a bucket (24) of a machine (20) where the bucket (24) is attached to a chassis (26) of the machine (20) by a linkage. The apparatus comprises an energy storage device (82) for storing potential energy of the bucket (24), payload (44), and linkage when the bucket (24) is moved from a first suspended position to a second suspended position. A mechanism (86) provides physical data corresponding to a physical change in the energy storage device (82) caused by storage of the potential energy and a processor (116) calculates the weight of the payload (44) using the physical data.
Abstract:
A hydropneumatic accumulator includes a shell in which gas and fluid ports are connected, respectively, with gas and fluid reservoirs of variable volume separated by a movable separator. The gas reservoir contains a compressible regenerator that fills the gas reservoir so that the separator movement reducing the gas reservoir volume compresses the regenerator. The regenerator is made from leaf elements located transversally to the separator motion direction and dividing the gas reservoir into intercommunicating gas layers of variable depths. The regenerator is preferably made from interconnected elastic metal leaf elements to allow variation of the bending strain degree so that the local bending strains of the leaf elements should not exceed the elastic limits at any position of the separator. The efficiency of fluid power recuperation and durability of the regenerator are increased.
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:
Die Erfindung betrifft einen Hydraulikfluidspeicher (30) mit einer Hochdruckkammer (32) und einer Niedrigdruckkammer (33), wobei die mit einem Ausgleichsvolumen (36) versehene Hochdruckkammer (32) in der Niedrigdruckkammer (33) angeordnet ist. An dem Hydraulikfluidspeicher (30) ist ein externer Anschluss (34) für das Ausgleichsvolumen (36) vorgesehen, über welchen das Ausgleichsvolumen (36) mit einem Gas mit einem vorgebbaren Druck befüllbar ist.
Abstract:
A pulsation attenuator for a fluidic system with a fluidic pump. The pulsation attenuator includes a fluidic channel, a first fluidic device adapted to attenuate pulsations with a shallow rolloff slope, and a second fluidic device adapted to attenuate pulsations with a shallow rolloff slope. The first fluidic device and the second fluidic device are connected to the fluidic channel such that they cooperatively attenuate pulsations with a steep rolloff slope. Preferably, the first fluidic device includes a first fluidic resistor and a first fluidic capacitor, and the second fluidic device includes a second fluidic resistor and a second fluidic capacitor. Preferably, the pulsation attenuator is arranged, similar a second-order low-pass filter, in the following order: (l) first fluidic resistor, (2) first fluidic capacitor, (3) second fluidic resistor, and (4) second fluidic capacitor.