Abstract:
A system (10) for transporting and dispensing fluent materials consists of a shipping container (20) disposed with a supply of fluent material, and having a bottom wall (202) with an outlet aperture, the outlet aperture being occluded by a normally disabled transfer valve (25); a base container (30) adapted for sealed attachment to the bottom wall (202) of the shipping container (20), the base container (30) having a top wall equipped with a means for enabling (35) the normally disabled transfer valve (25), when the base container (30) is properly attached to the shipping container (20), and a bottom wall which tapers downwardly to an opening with a valve (40) for dispensing particulate material at a controlled rate when the valve (40) is opened. A remotely operable metering valve is also disclosed as a substitute for the valve (40) in the base container opening.
Abstract:
An integral pump motor (97) or sealless magnetically coupled pump having a shrouded impeller (10) with a removable magnet carrier ring (30) attached to one side of the impeller shroud. Permanent magnets (38) are embedded in the magnet carrier ring and encapsulated to prevent contact with potentially agressive pumped fluids. The magnet carrier ring is mounted to the impeller shroud using an interlocking (or multiple keys) (32, 34) to transmit torque. The magnet carrier ring is fastened axially to prevent separation from the impeller shroud. Damage or breaking of the blading of the impeller and its being rendered inoperable will not necessarily dictate the accompanied loss of the high value magnet ring.
Abstract:
A fluid impeller for applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a chemical composition in the range according to table (I), the balance comprising iron and impurities. The preferred range is 17.5-18.5 % chromium, 0.5-0.75 % nickel, 0.45-0.55 % silicon, 0.2-0.25 % nitrogen, 15.5-16.0 % manganese and 0.1-0.12 % carbon. Quantitative testing has shown cavitation resistance of four to six times that of standard boiler feed pump materials. A method for making cavitation resistant fluid impellers is also disclosed.
Abstract:
A fluid impeller (100) for a centrifugal pump includes a hub (105) having a substantially disk-like form with a center and an edge, circular symmetry, and provosion for being rotatably driven. A first plurality of pumping vanes (110) projects substantially perpendicularly from a first surface of the hub and extends radially outwardly from a locus (210) near the center of the hub to another locus (150) near the edge of the hub. These vanes (110) provide a high pressure head with a small impeller diameter. A second plurality of separate and twisted inlet vanes (120) also projects substantially perpendicularly from the first surface of the hub and extends radially outwardly to the locus (210) near the center of the hub from another locus (220) nearer the center of the hub. The separate second plurality of vanes (120), by turning and pre-pressurizing the fluid, provides an impeller having capability of cavitation-free pumping at low net positive suction head (NPSH). A front shroud (180) can be used which partially or totally covers the first and/or second plurality of vanes.
Abstract:
A system for lubricating bearings on a vertical rotatable shaft within a bearing housing, is comprised of an annular lower lubricant sump (40) at a lower portion of the bearing housing (11); an annular upper lubricant reservoir at an upper portion of the bearing housing; and a conduit providing fluid communication between the lower lubricant sump (12) and the upper lubricant reservoir (20). Provision is made for metering a flow of lubricant from the upper lubricant reservoir (20), into upper bearings (14). The lubricant is pumped from the lower lubricant sump (40), through the conduit (35), to the upper lubricant reservoir (20) at a rate exceeding the rate of metered flow into the upper bearings (14). A constant head of lubricant above the metering orifice is provided in the upper lubricant reservoir (20), as well as an outlet for shunting excess lubricant back to the lower lubricant sump.
Abstract:
A screw pump includes a pump case (100) having a fluid inlet (112), a pumping chamber and a fluid discharge (113) with at least two intermeshed parallel screw members (125) rotatably mounted therein and in fluid communication with the fluid inlet and discharge. One synchronous drive electric motor (120) mounted to each screw member provides the driving power to the screws. Electronic controls are provided for sensing the rotary positions of the motors for synchronising rotation of the screw members. The pump is also capable of pumping multi-phase fluids.
Abstract:
L'invention concerne un système d'évent (11) conçu pour être installé sur un récipient standard à l'emplacement d'un bouchon pour le transport et le stockage. Ledit système permet d'éventer le récipient sans qu'il soit nécessaire de le modifier. Ce système d'évent est constitué d'un bouton (21) que l'on tourne dans un sens pour mettre ledit système d'évent en position de fermeture, pour transporter, par exemple le récipient, et que l'on tourne dans le sens inverse pour mettre le système d'évent en position de fonctionnement, c'est-à-dire pour laisser entrer de l'air dans le récipient lors du soutirage du fluide. Un boîtier d'évent (13) conçu pour être vissé dans une ouverture filetée du récipient (23) est prévu. Le bouton est constitué d'un chapeau (15) et d'un anneau (19) qui sont maintenus ensemble par un sceau révélant une tentative d'ouverture (17). Ledit bouton est bloqué par le carter de l'évent afin d'empêcher qu'il ne soit enlevé et d'empêcher l'accès au récipient. Le sceau révélant une tentative d'ouverture doit être enlevé pour accéder au carter de l'évent et pour enlever le système d'évent du récipient. Dans un autre mode de réalisation, il est prévu d'empêcher toute fuite de fluide du récipient par le système d'évent au cas où ledit récipient serait renversé.
Abstract:
A fluid pump comprises a cylindrical shaft (15) mounted in a housing (20) having a fluid passage (27) radially outboard of the shaft and extending circumferentially between at least one fluid inlet port (25) and at least one fluid discharge port (30). The ports are separated by an interruption (29) of the fluid passage located upstream of the inlet and downstream of the discharge. At least one rotatable regenerative rotor disc (10) is mounted on the shaft, the disc having a plurality of radially orientated impeller vanes (12) situated about the periphery thereof within the fluid passage (27) and also having a plurality of permanent magnets (110) embedded therein in a circular locus about the shaft, the magnets being sealed against pumped fluid. At least one set of motor windings (120) is encased in at least one wall of the housing axially adjacent the permanent magnets in the regenerative rotor disc and also sealed against pumped fluid. Means (250) is provided for controlling a flow of electricity through the motor windings to drive the rotor disc. The shaft may be supported in the housing in lubricated bearings or in magnetic bearings, or alternatively, the rotor disc may be rotatably supported on the shaft on lubricated bearings or on magnetic bearings.
Abstract:
A system (10) for transporting and dispensing fluent materials consists of a shipping container (20) disposed with a supply of fluent material, and having a bottom wall (202) with an outlet aperture, the outlet aperture being occluded by a normally disabled transfer valve (25); a base container (30) adapted for sealed attachment to the bottom wall (202) of the shipping container (20), the base container (30) having a top wall equipped with a means for enabling (35) the normally disabled transfer valve (25), when the base container (30) is properly attached to the shipping container (20), and a bottom wall which tapers downwardly to an opening with a valve (40) for dispensing particulate material at a controlled rate when the valve (40) is opened. A remotely operable metering valve is also disclosed as a substitute for the valve (40) in the base container opening.
Abstract:
A fluid impeller for applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a chemical composition in the range according to table (I), the balance comprising iron and impurities. The preferred range is 17.5-18.5 % chromium, 0.5-0.75 % nickel, 0.45-0.55 % silicon, 0.2-0.25 % nitrogen, 15.5-16.0 % manganese and 0.1-0.12 % carbon. Quantitative testing has shown cavitation resistance of four to six times that of standard boiler feed pump materials. A method for making cavitation resistant fluid impellers is also disclosed.