Abstract:
An accumulator (ACC) in which a container main body (1) and a closure member (5) are screw-joined together. A reverse-buttress internal thread or an internal thread having an included angle of 90 degrees is used as an internal thread of the screw-joined portion. The reverse-buttress internal thread is formed in such a way that the inclination angle (beta) of a clearance flank of the buttress internal thread is the inclination angle (beta) of a reverse pressure flank (20A) receiving a load, and the inclination angle (theta) of a pressure flank is the inclination angle (theta) of a reverse clearance flank (2B). The internal thread having an included angle of 90 degrees is formed in such a way that inclination angles (alpha), (gamma) of both flanks are equal and the included angle (delta) is about 90 degrees.
Abstract:
Die Erfindung betrifft einen hydropneumatischen Druckspeicher mit einem Speichergehäuse (10) und einer darin befindlichen, ein bewegdares Trennelement zwischen einem ersten Raum, insbesondere Gasraum (14), und einem zweiten Raum, insbesondere Fluidraum (16), bildenden Membran (12), die im fluidfreien Zustand des Fluidraumes (16) eine Einlassöffnung (18) im Speichergehäuse (10) mit einem Schliessteil (20) abdeckt, die mit ihrem freien Befestsigungsrand (24) innerhalb des Speichergehäuses (10) über eine Befestigungseinrichtung (26)festgelegt ist und die mittels des in die Einlassöffnung (18) einströmbaren Fluides als ausschliesslich wirkende Betätigungseinrichtung gegen den Gasdruck im Gasraum (14) beweghar ist. Dadurch, dass die Einlassöffnung (18) Teil eines Anlagedomes (28) ist, der mit einem axialen Überstand entlang der Lägsachse (30) des Speichergehäuses (10)in dieses hineinragt und der als stationär ausgebadetes Bauteil Bestandteil des Speichergehäuses (10) ist und dass zumindest im fluidfreien Zustand Teile der Membran (12), die zwischen Schliessteil (20) und Befestigungsrand (24) liegen, in einer kreisförmigen Vertiefung (32) zwischen Anlagedom (28) und Befestigungseinrichtung (26) aufgenommen sind, ist für dass Trennelement eine Art Rollmembran verwirklicht mit einem sehr günstigen geometrischen Verhältnis zwischen Durchmesser zur Höhe der Membran.
Abstract:
Die Erfindung betrifft eine hydropneumatische Druckspeichereinrichtung mit einem Speichergehäuse (10) und einer darin befindlichen, ein bewegbares Trennelement zwischen einem ersten Raum, insbesondere Gasraum (14), und einem zweiten Raum, insbesondere Fluidraumes (16), bildenden Membran (12), die im fluidfreien Zustand des Fluidraumes (16) eine Einlassöffnung (18) im Speichergehäuse (10) mit einem Schliessteil (20) abdeckt und die mit ihrem freien Befestigungsrand (24) innerhalb des Speichergehäuses (10) über eine Befestigungseinrichtung (26) festgelegt ist. Dadurch, dass das Speichergehäuse (10) an seiner einer Befestigungsstelle (34) zugewandten Seite eine eben verlaufende Anlagefläche (36) aufweist und dass zwischen der Anlagefläche (36) und der Befestigungsstelle (34) sich ein federelastisches Abstützteil (40) erstreckt, das die Verbindung zwischen Speichergehäuse (10) und Befestigungsstelle (34) herstellt, ist ein sehr flach aufbauender Hydrospeicher geschaffen, der über ein federelastisches Abstützteil eine sichere Entkopplung von Maschinenbauteilen unter Einsatz des Hydrospeichers vornimmt.
Abstract:
A hydraulic energy accumulator consisting of a housing (7) with a space (4) for inserting metal bellows (5), comprising a non-moveable end and a moveable end with a front wall arranged in a sealed manner on the bellows and separating a hydraulic pressure medium from a pressurized gas is already known per se. The advantage of using metal bellows is that they are gas-tight in so far as no leak arises over time. According to the invention, the bellows are embodied in such a way that the pressure of said bellows in the gas is reduced in comparison with the hydraulic medium as a result of the longitudinal elasticity of said bellows and a sensor system (6) is provided which indicates a longitudinal expansion of the bellows (5) when the hydraulic pressure medium flows through a leak in said bellows into the area containing the gas. The inventive hydraulic energy accumulator (2) and the sensor system (6) thereof are also capable of indicating when such a leak occurs in the bellows. The indication of a leak is also an indication that a motor vehicle braking system fitted therewith has become unsafe.
Abstract:
The invention relates to a piston-type accumulator designed notably for hydraulically actuating the discharge unit in non-automotive bulk commodity vehicles. In said accumulator the cylinder (1) comprises a tappet (25) which can be axially displaced within the cylinder and when a defined load pressure is reached in the oil chamber (5) of the cylinder (1) can be displaced by the piston (3) so as to actuate a control valve (23). The valve serves as shut-off device for the loading fluid stream flowing to the oil chamber (5) and is positioned as a detachable module on the exterior face of the cylinder cover (39) in such a way that it can be actuated by the outer end of the tappet (25) which is guided towards the outside by passing in a sealed manner through the cylinder cover (39).
Abstract:
The invention concerns a sphere in particular hydropneumatic comprising a rigid envelope (1) and a deformable flexible membrane (2) arranged inside said envelope to define an upper chamber (4) and a lower chamber (5), the sphere comprising in the upper chamber (4), means (6, 7, 8) associated with the envelope (1) or the membrane (2) for perforating the membrane (2) when there is excess pressure in the lower chamber (5) thereby reducing pressure in said chamber.
Abstract:
The invention concerns a device for storing and delivering fluid under pressure in hydraulic systems, comprising a motor unit (4), a pump unit (3) and a storage unit (2). The invention is characterised in that, in order to produce an assembly with the least possible space requirement and optimal weight, the pump group (3) is arranged inside the storage unit (2). The pump unit (3) can advantageously be placed in a cover element (2f) of the storage unit (2) housing (2a).
Abstract:
The invention relates to the compact construction unit of a hydraulic unit, especially for a slip-controlled braking system. A pump (17, 18, 19), electromagnetically actuated valves and at least one low-pressure storage unit (24) are arranged inside a valve block (1). The valve actuators are situated opposite an electric motor driving the pump (17, 18, 19) and in front of a base (29) of the valve block (1). The housing of the low-pressure storage unit is embodied as an add-on piece (30) made of a metal sheet drawn in a cup-shaped manner. The edge of the add-on piece (60) is fastened in the mouth of a blind hole (32) in the valve block (1). Said add-on piece (30) extends above the base (29) and has about the same height as the valve actuators (23). The actuators and add-on pieces (30) are covered by a housing cap (75) on the valve block which cap protects them against environmental influences. This arrangement is very compact and allows for the construction of a relatively small and thus light valve block (1).
Abstract:
A compact hydraulic aggregate for drive slip-regulated braking systems has several hydraulic, mechanical and/or electrically actuated functional elements arranged on a reception body, such as accumulator, valve (1, 1'), pressure generator (5) and driving elements (6), several pressure medium ducts (4, 5, 16) for inteconnecting the functional elements, establishing a hydraulically switchable connection between at least one pressure medium supplier (14) and a pressure medium consumer (19), and a control device connectable by electric conductors to the valve (1, 1') and driving elements (6). The valve elements (1, 1') are arranged in several valve reception bores (2, 2') of the valve reception body (3) which receives a first and a second row of valves (x, y). Between both diametrally opposed rows of valves (x, y) are provided several pressure medium bores (4) for inteconnecting the valve elements (1, 1') and bores (7, 8) for receiving the pressure generator (5) and dribing element (6). Additional co-axially arranged reception bores (9, 10, 11) open into the valve reception body (3) outside both rows of valves (x, y).