Abstract:
Disclosed is an accumulator comprising: a pressure vessel; an elastic bellows in which a compressed gas is sealed, an end of the bellows being fixed to an interior of the pressure vessel; a flow path having an opening communicating with the interior and an exterior of the pressure vessel; a valve connected to a movable end of the bellows to operatively close the opening according to elastic motion of the bellows; and a hydraulic chamber partitioned from a gas chamber formed in an interior of the bellows containing the compressed gas. The valve comprises an upper surface which can cover the opening, and plural circular protrusions which surround the entire circumference of the opening and can closely contact the circumference of the opening.
Abstract:
A media divider has a divider piston, which is received in a cylinder bore and embodied as a tubular deep-drawn part. Two pairs of a sealing ring and an annular guide part disposed side by side are provided, whose axial spacing is defined by at least one spacer bushing disposed coaxially with the divider piston. The two pairs comprising the sealing ring and guide part as well as the spacer bushing may be axially fixed either in the cylinder bore or on the divider piston. The media divider may be used in the form of a plunger or as a reservoir in a fluid-carrying brake system.
Abstract:
A compact hydraulic unit for slip-controlled brake systems with several hydraulically, mechanically and/or electrically operable functional elements (e.g. accumulator, valve elements, pressure generating and driving elements) arranged in an accommodating member, with several pressure fluid channels connecting the functional elements. The pressure fluid channels create a hydraulically operable connection between at least one pressure fluid supply means and one pressure fluid consumer. A control device can be connected with the valve and the driving elements by means of electrical conductors. The valve elements are arranged in several valve accommodating bores of the valve accommodating member in a first and a second row. Pressure fluid bores are provided between the two diametrically extending valve rows which connect the valve elements and location bores containing the pressure generating element and the driving element. Outside the two valve rows, there are further location bores in the valve accommodating member in which pressure accumulator pistons are positioned.
Abstract:
In a bladder type accumulator the interior of which is divided by an expandable bladder into a gas chamber and a liquid chamber, a cartridge filled with gas is housed in said gas chamber, said cartridge is provided with a perforation means at its top for allowing pressure gas to flow out from said cartridge. During storage of the accumulator the cartridge is kept tightly closed so that the bladder remains relaxed and pressure of gas remains unchanged.
Abstract:
A hydraulic accumulator cylinder encloses an elastically compressible and expansible gas cushion separated from the hydraulic fluid by a floating piston having sealing and guiding rings. The cylinder has one end wall formed with a substantially central hydraulic fluid inlet and outlet opening, the inner surface of this one end wall defining a bowl shape concavity. An additional ring on the piston constitutes a dirt stripper, and the face of the piston toward the one cylinder end wall is formed with a frustoconical protrusion which, when the maximum amount of fluid has been withdrawn from the cylinder, enters the opening. The piston is formed with an annular bearing surface around the protrusion and engageable with a stationary sealing ring on a countersurface in the concavity, the sealing ring acting as a seal only when the piston is pressed against the countersurface by the gas pressure. In this position of the piston, the piston and the one cylinder end wall define an annular chamber in which there remains a residual amount of fluid serving as a liquid barrier against the gas enclosed in the cylinder.
Abstract:
The invention provides a metal bellows type accumulator having an outer shell provided in its one end with a pressure introducing passage in an opening manner, an axially expandable metal bellows including peak portions directed to an outer side in a radial direction and trough portions directed to an inner side alternately in an axial direction, having an axially fixed end to the outer shell and separating an inner chamber of the outer shell into a pressure introducing chamber and a gas chamber charged with cushion gas, and a support member arranged in an inner periphery of the metal bellows, fixed to the outer shell and constructed by a cushioning member. A clearance in a radial direction between the trough portions of the metal bellows and the support member is smaller than a clearance in a radial direction between the peak portions of the metal bellows and the outer shell.
Abstract:
An accumulator of the invention is provided with a safety mechanism for an emergency which releases an internal pressure of the housing to the oil port side so as to prevent the housing from being exploded by the internal pressure of the housing which comes to a higher pressure in an emergency, for example, occurrence of fire disaster. The safety mechanism for the emergency has a taper portion in a corner portion between the tubular portion and the end surface portion of the stay. The taper portion is buckled at its root position in the emergency. In the case that the taper portion is buckled, a pressure releasing flow path is formed between the bellows cap or the retained member and the taper portion as well as the bellows cap or the retained member and the end surface portion come away. The stay can be manufactured only by press molding.