Abstract:
In the interior of the housing of an accumulator, a metallic bellows and a self-seal mechanism are arranged. The metallic bellows partitions the interior of the housing into a gas chamber and a liquid chamber. The self-seal mechanism includes an elastic seal member and a face which the elastic seal member opposes. When the bellows is compressed to the predetermined extent due to introduction of a compressed gas into the gas chamber, the elastic seal member is brought into contact with the face, thus closing a flow port. The elastic seal member has a slanted face, so that a wedge-shaped liquid guide gap is produced when the elastic seal member is in contact with the face. When, in this condition, the compressed liquid is introduced into the flow port, part of the liquid enters the liquid guide gap, thus permitting the seal member to easily separate from the face.
Abstract:
A means for mounting a diaphragm in an accumulator-reservoir device or the like in which the gland receiving the diaphgram bead has faces formed to oppose such pull on the bead as will break the sealing contact between gland faces and the bead. Back draft angles and grooved surfaces are used in conjunction with an initial applied compression to fix the bead in place in the gland.
Abstract:
This invention relates to the art of Pressure Vessels, more particularly of the type using a deformable bladder having a cylindrical mouth of relatively large diameter with a thickened rim in which is bonded a rigid annular retaining member, the outer periphery of which extends radially outward beyond the periphery of the thickened rim, said retaining member having an annular groove in its outer perihery in which an O-ring is positioned to define a seal with respect to the side wall of the container in which the bladder is positioned, a portion of the thickened rim extending longitudinally beyond the outer surface of the annular retaining member and conformed to define an O-ring with respect to the closure plug of the pressure vessel which is secured in the mouth thereof.
Abstract:
A pressure transfer unit having a movable partition including a flexible bellows for separating an internal, controlled-pressure chamber from a reference-pressure chamber. A valve is provided for limiting the volume of liquid that can be injected into and received in the controlled-pressure chamber during filling or refilling thereof. A spring biases the partition to apply a predetermined force to the partition and to shut off fluid transfer in the event of bellows failure. The unit is arranged for simple and rapid assembly and disassembly.
Abstract:
Pour assurer l'étanchéité entre deux surfaces opposées de deux éléments mécaniques (1, 2), on prévoit un joint d'étanchéité combiné destiné à être installé dans une rainure ouverte (3) ménagée dans l'un des éléments mécaniques (2). Le joint d'étanchéité comprend un anneau à expansion élastomère (4, 5) placé au fond de la rainure (3), un anneau intermédiaire (6) en matériau visco-élastique, tel que du polytétrafluoroéthylène (PTFE), et présentant une surface de garniture étanche (6b) en contact avec l'élément mécanique de jointure (2), et un anneau externe élastomère (8) disposé dans une rainure séparée (7) ménagée dans la surface de garniture étanche (6b) de l'anneau intermédiaire. En particulier dans les cas où le joint d'étanchéité doit séparer un fluide d'un gaz, on obtient une répartition améliorée de la pression de contact au niveau de la surface de garniture étanche (6b) et également un relâchement hydrodynamique efficace de l'anneau externe (8), pour empêcher son exposition aux pressions préjudiciables et ainsi tout dommage qui en résulterait, en concevant l'anneau intermédiaire (6) aux extrémités de la surface de garniture étanche (6b) avec des angles comparativement saillants (16, 17), les parties de la surface de garniture étanche comprises entre ces angles et la rainure séparée (7) formant des faces coniques (14, 15) qui, par un angle étroit fendu, convergent vers la rainure séparée (7). L'anneau intermédiaire peut également être sollicité par deux anneaux d'expansion (4, 5) placés de chaque côté de la rainure séparée (7).
Abstract:
Provided is an accumulator, which: is capable of reducing the pressure difference that is generated by differences in coefficients of thermal expansion when liquid trapped in the liquid chamber and a sealed gas undergo thermal expansion during zero-down, thereby limiting the occurrence of plastic deformation in the bellows; and has a structure in which the parts are small and few in number. To achieve said purpose, the accumulator has a sealing member held on the port hole-side of the bellows cap via a seal holder. When operation of the machine is stopped and the pressure inside the pressure piping decreases, the sealing member contacts the sealing section and closes the liquid chamber. If liquid trapped in the liquid chamber when the liquid chamber is closed undergoes thermal expansion, the bellows cap moves in the direction away from the sealing section while the sealing member is still in contact with the sealing section. Since the sealing member is a rigid plate, the outer circumferential surface of which is covered by a flexible section obtained from a rubber-like elastic body, the flexible section allows relative movement of the bellows cap by undergoing shear deformation as a result of engagement with the seal holder.
Abstract:
Provided is an accumulator, which: is capable of reducing the pressure difference that is generated by differences in coefficients of thermal expansion when liquid trapped in the liquid chamber and a sealed gas undergo thermal expansion during zero-down, thereby limiting the occurrence of plastic deformation in the bellows; and has a structure in which the parts are small and few in number. To achieve said purpose, the accumulator has a sealing member held on the port hole-side of the bellows cap via a seal holder. When operation of the machine is stopped and the pressure inside the pressure piping decreases, the sealing member contacts the sealing section and closes the liquid chamber. If liquid trapped in the liquid chamber when the liquid chamber is closed undergoes thermal expansion, the bellows cap moves in the direction away from the sealing section while the sealing member is still in contact with the sealing section. Since the sealing member is a rigid plate, the outer circumferential surface of which is covered by a flexible section obtained from a rubber-like elastic body, the flexible section allows relative movement of the bellows cap by undergoing shear deformation as a result of engagement with the seal holder.
Abstract:
Provided is an accumulator, which: is capable of reducing the pressure difference that is generated by differences in coefficients of thermal expansion when liquid trapped in the liquid chamber and a sealed gas undergo thermal expansion during zero-down, thereby limiting the occurrence of plastic deformation in the bellows; and has a structure in which the parts are small and few in number. To achieve said purpose, the accumulator has a sealing member held on the port hole-side of the bellows cap via a seal holder. When operation of the machine is stopped and the pressure inside the pressure piping decreases, the sealing member contacts the sealing section and closes the liquid chamber. If liquid trapped in the liquid chamber when the liquid chamber is closed undergoes thermal expansion, the bellows cap moves in the direction away from the sealing section while the sealing member is still in contact with the sealing section. Since the sealing member is a rigid plate, the outer circumferential surface of which is covered by a flexible section obtained from a rubber-like elastic body, the flexible section allows relative movement of the bellows cap by undergoing shear deformation as a result of engagement with the seal holder.