Abstract:
A rotary seal housing having opposing ends (43, 44), a first fluid conducting slot (71) at one of the opposing ends, a pair of spaced apart fluid conducting slots (60, 61) at the other opposing end, and sets of apertures (64) connecting the first fluid conducting slot (71) with the pair of fluid conducting slots (60,61), the housing having helical push back grooves that are arcuate in cross-section.
Abstract:
A method of obtaining a hermetic seal capable of withstanding underwater pressure conditions by the controlled use of a circulating refridgerant within a tubular coil or other system set within or adjacent to the surfaces to be mated so as to freeze the adjacent water thereby enabling a pressure differential to exist on either side of the seal sufficient for personnel to perform work within the sealed area at pressures which do not require saturation of the body with "diving gas".
Abstract:
Ein Konzept für einen Dichtungsring (100a) mit einer Elektrode (110a), die ausgebildet ist, um mit einer an einem gegenüberliegenden Dichtungsring (100b) angebrachten ersten Gegenelektrode (110b) in einem ersten Zwischemaum zwischen den Elektroden (110a, 110b) ein Hochspannungsplasma zu bilden und um mit einer an dem gegenüberliegenden Dichtungsringsegment (100b) angebrachten zweiten Gegenelektrode (110c) in einem zweiten Zwischemaum zwischen den Elektroden (110a, 110c) ein Hochspannungsplasma zu bilden.
Abstract:
The pump can compress a transport medium (20) at a pressure of up to approximately 22 kbar. The very high pressure seal is made of a pressure-compensated ice seal which operates without leakage and minimum friction. To limit the generally very high frictional forces in the ice seals, a rotational movement is superimposed on the translational movement of the piston (10). The complete machine is regulated by means of a microprocessor as a function of the operating parameters and flow output. The very high pressure seal has a long service life even when used in very high pressure ranges.
Abstract:
Seal assemblies (100) are provided. In one embodiment, an example shaft seal assembly comprises an immiscible fluid (130) and a reservoir structure (140). The immiscible fluid is immiscible with respect to a contained internal fluid in an enclosure with a penetrating shaft (110). The reservoir structure is disposed in close proximity to the shaft, and the reservoir structure contains the immiscible fluid. The immiscible fluid of the seal assembly provides a fluid barrier to the internal fluid to limit loss of the internal fluid over time.
Abstract:
A method for sealing lengthy porous bodies moving between zones of different pressures where a porous body (T) while moving between the zones of different pressures (P1, P2) is passed through a sealing substance (M) under pressure. A substance with thixotropic properties, used as the sealing substance, is continuously fed to the porous body (T) under a pressure higher than that in the zone (P1) of high pressure, whereas the porous body (T) is impregnated with the thixotropic sealing substance (M) so that its cross-section is filled up, on its whole length, by the sealing substance. A hydraulic cylinder on the basis of the method comprises a chamber (7) filled with a visco-elastoplastic substance and connected to a means of creating a pressure inside it which is higher than that of the working fluid filling the space inside the casing of the cylinder.
Abstract:
Device for isolating from the external ambient a processing chamber for continuous treatment of manufactured goods (F) comprising at least one dynamic seal element (A) characterised in that it is provided with a cooling system (8) to cool down part of its surface below the melting and/or condensing temperature of an auxiliary material, causing such auxiliary material to coat said part.
Abstract:
A process and device are disclosed for reducing the gap between a static part (2) and a movable part (1). A gas compatible with the working media of the installation is at first and temporarily introduced into the area of the gap, where it precipitates and transforms into ice (5) because of the presence of a cooling channel (4) in the area of the gap. This process may be applied both to mechanical pumps and to valves; in the case of the latter, the ice layer is compressed when the valve is closed.