Abstract:
The present invention relates to a method for compressing a gas mixture comprising neon, in a closed-loop cycle. The method comprises: providing a flow of the gas mixture and providing a compression device having at least one gas seal (33) and providing a gas seal flow to the at least one gas seal. The gas mixture is then compressed in the compression device, thereby forming a compressed gas mixture. A composition of the gas mixture is measured in at least one location. The method further comprises comparing the measured composition of the gas mixture with respect to a predetermined value or range, and determining if there is a deviation from the predetermined value or range. When a deviation from the predetermined value is determined at least one operating parameter of the process cycle is adjusted to optimise the parameter for the change in composition; and/or the composition of the gas mixture in the cycle is adjusted, so that the measured composition of the gas mixture no longer deviates from the predetermined value or range.
Abstract:
A rotating shaft seal assembly for a shaft supported for rotation within a housing includes a traction drive rotating a seal ring about the shaft at a speed different from the shaft. The seal ring supports a plurality of seal elements rotated at the speed different from the shaft. The reduced speed of the sealing elements and reduced pressure at each seal reduces the PV level allowing the use of known sealing materials in applications otherwise not within applicable PV levels.
Abstract:
A slurry seal assembly (20) for use about a rotatable shaft (21) between a process side (54) and an atmosphere side (55) is presented. The slurry seal assembly (20) includes a sleeve (22), a rotatable seal ring (23), a stationary seal ring (24), a floating bushing seal assembly (50), and a plurality of slots (52). The sleeve (22) is disposed about and rotatable with the shaft (21). The rotatable seal ring (23) contacts and is rotatable with the sleeve (22). The stationary seal ring (24) is arranged to form a sealing interface (25) with the rotatable seal ring (23). The floating bushing seal assembly (50) is disposed about the sleeve (22) so that an inner annular surface (66) along the floating bushing seal assembly (50) is separated from an outer annular surface (67) along the sleeve (22) by a gap (65). The slots (52) are disposed along the sleeve (22) within the process side (54) adjacent to the floating bushing seal assembly (50). The slurry seal assembly (20) is applicable to devices whereby a fluid is movable between an inlet and an outlet.
Abstract:
La présente invention concerne un compresseur 9, 17 électrique comportant un arbre 13 entrainé en rotation par un moteur électrique par l'intermédiaire de roulements 6, l'arbre entraiment en rotation une roue de compresseur14, le compresseur 9 comportant deux segments d'étanchéité 29a, 29b montés autour de l'arbre 13 entre les roulements 16 et la roue de compresseur 14 et comportant un trou d'évent31, 35, 38, de circulation de flux de polluants vers l'extérieur du compresseur, dont l'entrée est disposée entre les deux segments d'étanchéité, le trou d'évent comportant un élément anti retour 36.
Abstract:
A coupling (6) to attach an impeller (32) of a compressor to a shaft (16) of an electric motor. The coupling has a coupling body (100) that is attached at a first of the ends thereof to the impeller and at the opposite second end, to the motor shaft. The coupling body has a deformable section (106) between the first and second ends of the coupling body. The deformable section is configured such that under an unbalanced loading exerted against the coupling body upon a failure of the impeller, the deformable section will permanently deform without the ultimate strength of a material forming the coupling body being exceeded and prior to a permanent deformation of the shaft. In such manner, the electric motor is protected from damage upon a failure of the impeller.
Abstract:
A compensated motor barrier and pump lubrication fluids pressure regulation system for a subsea motor and pump module is disclosed, comprising a hydraulic fluid supply providing barrier fluid and lubrication fluid to the motor and pump module, a barrier fluid circuit (14, 15, 17) in which the hydraulic fluid is pre- tensioned towards the motor by a pressure applied from a first separating pressure compensator (19), a lubrication fluid circuit (21, 22, 24) in which the hydraulic fluid is pre-tensioned towards the pump by a pressure applied from a second separating pressure compensator (26). The second pressure compensator (26) is responsive to the pumped medium pressure at a suction or at a discharge side of the pump and applies the sum of that pressure and its inherent pre-tensioning pressure to the lubrication fluid circuit, and the first pressure compensator (19) is responsive to the pressure in the lubrication fluid circuit and applies the sum of that pressure and its inherent pre-tensioning pressure to the barrier fluid circuit.
Abstract:
To avoid formation of condensate or freezing in the tandem gas seals (12, 13) of a gas compressor (1), such as for use in the compression of production of natural gas, when the compressor is temporarily stopped for maintenance or repair of the compressor or instrumentation, the settle out pressure (SOP) in the high pressure gas discharge line (7) from the compressor (1), arising from equalising the inlet and outlet gas pressures, is directed to cause gas to flow through a branch line (25) to the outboard gas seal (13), the gas being heated by an electrical heating coil (28) and its pressure being reduced in a controlled manner. In this way, the gas is prevented from entering its liquid-vapour phase, so that no condensate can form in the inboard and outboard gas seals (12, 13).