Abstract:
An accumulator including a shell (1) divided into a gas chamber (a) and a fluid inflow chamber (b) by a bladder (32) made of a cold-resistant and gas-barrier laminated sheet which includes a polyvinyl alcohol type resin film (20) containing a polyol type plasticizer in an amount of 15% to 50% by weight, a rubber sheet layer (21) laminated at least one side of the polyvinyl alcohol type resin film and a film (23) disposed therebetween of a non-vapor- and non-plasticizer-permeable resin film.
Abstract:
A thin walled membrane type diaphragm particularly for liquid pressure accumulators and a method of production is disclosed comprising membrane made from rubber, synthetic rubber, P.V.C. or like suitable material including a neck portion forming the opening of the diaphragm and adapted to be mounted in the neck of a pressure tank and a closed tank region or body region which is formed from cruciform pleats which may be symmetrical such that the dimension of the body portion is reduced for a given volume of body region.The moulding of the diaphragm in this form enables a diaphragm of greater internal capacity to be moulded in a given sized injection moulding such that the core size of the moulding machine can be readily removed through the base region of the diaphragm.
Abstract:
An elastic separating wall to be arranged between a gas chamber with a high pressure and a liquid chamber, particularly for a pressure accumulator, comprises an elastic separating wall member composed of a plurality of layers, the layers including at least two outer layers, and at least one inner layer composed of a material having a high gas permeability, means for connecting the elastic separating wall member to a wall of a container in a connecting region, and a passage arranged in the region and communicating with the inner layer with an atmosphere.
Abstract:
This invention relates to a pressure vessel and more particularly to a pressure accumulator of the type including a rigid container having a pair of ports at its respective ends with a deformable partition or bladder therein having a mouth at one end affixed to one of said ports, said bladder separating two fluids such as gas or liquid under pressure in said container.The bladder is of the type formed from two separate sections, each substantially cup-shaped, so that when the rims of the sections are joined, a closed container will be formed.As the bladder expands t o force liquid from the other port of the container, stress will be imparted to the wall of the bladder as a result of the stretching thereof, and such bladder wall is conformed to minimize the stress that would otherwise be imparted to the junction between the two sections of the bladder.