Abstract: A vacuum heat treating furnace includes a pressure vessel having a wall that defines a chamber wherein metal parts are vacuum heat treated. A fan is disposed inside the chamber for circulating a cooling gas therein. An electric motor is mounted externally to the pressure vessel for driving the fan. A drive shaft interconnects the fan and the electric motor through an opening in the wall of the pressure vessel. The vacuum furnace incorporates a dual seal for providing a vacuum-tight seal and a gas-tight seal where the drive shafts passes through the pressure vessel wall. The dual seal includes an inflatable seal surrounding the drive shaft for providing a vacuum-tight seal around said drive shaft when the furnace chamber is evacuated to a subatmospheric pressure.

Abstract: A percolator system for providing fluid flow to bearings and seals supporting a shaft, on which is mounted an impeller having pumping vanes, disposed within a housing of a centrifugal pump, during intermittent dry running periods, the pump having a vertical upwardly directed discharge nozzle, includes a chamber having a lower end attached to the discharge nozzle and an upper end attached to a discharge pipe, the chamber having an inside diameter greater than an outside diameter of the discharge nozzle, and the chamber further having an internal percolator pipe at least equal in diameter to the discharge nozzle and extending from the nozzle to a height less than the height of the chamber such that fluid coming from the nozzle overflows into the chamber. A fluid return port near the lower end of the chamber has one end of a return tube attached.

Abstract: An arrangement provided for turbine wheels (4) with cover disks (6, 7) which have a contactless sealing region (8, 9) to the housing. An apron-shaped free jet is created within a mixer zone (15) by increasing the transmission cross-section to the housing side in connection to the sealing region (8, 9) in a stepwise manner in the mixer zone (15) adjoining in the same direction and by connection channels (16, 17, 18) from the outer air to the beginning of the mixer zone (15), the air (13) is sucked in and mixed in in order, after steering, to supply the water-air mixture at the rotor wheel outlet end (21) to the main flow (5). Air (13) is thus fed in behind the sealing region (8, 9) which, on the one hand, calms the flow in the main flow (5) behind the rotor wheel under partial load without auxiliary aggregates and, on the other hand, reduces the friction losses between the rotor wheel (4) and housing (1).

Abstract: A runner seal positioning system comprises an annular runner seal piston and an annular runner seal seated against the piston and mounted for rotation with respect to the piston. The runner seal and the piston allow a fluid leakage therebetween. A pressure supply extends to the piston for supplying a back pressure to force the piston against the runner seal to limit the fluid leakage. A weir box is provided, and a drain extends from the runner seal and the piston to the weir box for draining the fluid leakage into the weir box, so that the fluid level in the weir box is directly related to a rate of the fluid leakage. Pressure control componentry is operatively connected to the pressure supply and is responsive to the fluid level for automatically increasing the back pressure as the fluid level rises and automatically decreasing the back pressure as the fluid level falls.

Abstract: A fluid cooled seal arrangement for a gas turbine engine including a first sealing element coupled to a mechanical housing of the engine, and a second sealing element connected to a shaft rotatable within the housing. The first and second sealing elements are arranged radially adjacent to one another to form a rubbing interface therebetween. A lubrication system for delivering cooling fluid to the second sealing element through a passageway arranged along the rotating shaft. The cooling fluid is discharged through a plurality of openings formed in one end of the passageway. During normal operation of the engine the centrifugal force from the rotation of the shaft flings the oil radially outward to a channel formed on the underside of the second sealing element. The channel receives the cooling fluid therein, and allows for the escape of the cooling fluid onto the underside of the second sealing element to provide a uniform thickness of cooling fluid thereon.

Abstract: Disclosed is a cooling fan for motors mainly includes a back cover formed with a through shaft holder and a front cover formed with a plug member and a rotary shaft projected from the plug member. Two bearings or copper bushings are disposed inside the shaft holder to together with an oil ring seal disposed at a front opening of the shaft holder to divide an inner space of the shaft holder into three oil chambers. The front cover is covered over the shaft holder with the plug member received in the front opening thereof and the rotary shaft extending through the oil ring seal and the two bearings and being held thereto by a washer put over a free end of the rotary shaft projected out of the second bearing. Lubricant or the like is filled into the oil chambers in the shaft holder from a back opening of the shaft holder and is stored therein by another oil ring seal disposed in the back opening.

Abstract: An improved motor driven centrifugal refrigerant compressor is disclosed having a housing enclosing a motor, control electronics and moving parts of the compressor, and a fluid pathway for circulating a mixture of low pressure refrigerant and a lubricant around the pathway, the pathway including a lubricant concentrator for coalescing the lubricant of the mixture to lubricate moving parts of the compressor and the pathway also including a convective heat transfer region to cool the motor and control electronics within the housing.

Abstract: A turbopump which operates at cryogenic temperatures to pump cryogenic liquid fuels to high pressure which includes a rotating group including a shaft mounted turbine to directly drive a multistage pump with the rotating group being supported on process fluid foil journal bearings and a hydrostatic and hydrodynamic hybrid thrust bearing.

Abstract: A magnetically drive centrifugal pump comprises a fixed assembly formed by a pump barrel made of a carbonaceous material, rigid annular bearings and a non-magnetic, non-electrically conductive sealing shell, and a rotating assembly formed by an impeller made of a carbonaceous material, a cylindrical rotor made of a carbonaceous material and having sealed therein permanent tracking magnets. The rotor is fixed directly to the impeller to form an impeller-rotor assembly which rests on the annular bearings. The driver includes magnets which interact with the permanent tracking magnets of the rotor in order to drive the pump, the driver being isolated from the impeller-rotor assembly by the sealing shell. The impeller-rotor assembly includes a secondary circuit for circulation of transported fluid located between the impeller-rotor assembly and the sealing shell.

Abstract: A motor vehicle water pump lubricating chamber arrangement having a housing in which a pump shaft is rotatably journalled which carries a running wheel at a free end thereof and which in a lower region adjoining the running wheel has at least one seal. In a region above the lower seal between the pump shaft and the housing there is provided a chamber filled with lubricating medium so that any fluid lubricant which can otherwise discharge around the shaft will have such fluid caught in the lubricating medium chamber rather than escaping with any trace and track of escaping fluid along any external surface of the water pump which could mislead someone to prematurely replacing the water pump when such replacement is not yet necessary. The pump shaft is journalled free of play via roller bearings including roller bodies pressed into the raceways provided on the pump shaft and on the housing respectively.

Abstract: In a pump drive for a motor vehicle automatic gearbox, a hollow shaft (6) secured in rotation to a primary part (3) of a torque converter (1) projects into the inside of a pump housing (7) and bears an impeller (10) of the pump. The hollow shaft (6) is borne in a bore (12) in the pump housing (7) via a rolling bearing, whereby, in order to seal the pump housing, there is a radial sealing ring (18) on one side of the rolling bearing and a sealing ring (14) on the other. The latter ring (14) is designed to enclose a uniform sealing gap (25) with the hollow shaft (6) and it is guided freely both radially and axially in the bore (12) so that the sealing gap (25) may automatically set itself.

Abstract: An improved motor driven centrifugal refrigerant compressor is disclosed having a housing enclosing a motor, control electronics and moving parts of the compressor, and a fluid pathway for circulating a mixture of low pressure refrigerant and a lubricant around the pathway, the pathway including a lubricant concentrator for coalescing the lubricant of the mixture to lubricate moving parts of the compressor and the pathway also including a convective heat transfer region to cool the motor and control electronics within the housing.

Abstract: A side channel machine has at least one impeller, which is rotatably mounted in the housing of the machine. The impeller includes a disk-shaped hub part and of a blade ring mounted on its periphery. The impeller can be mounted on the shaft of a drive motor by means of a hub bore provided on the hub part. In the case of this side channel machine, a side channel is formed at least on one side of the blade ring in the housing and extends circumferentially between one intake and one outlet port of the housing. Furthermore, sealing gaps are provided at least in the area of the hub part which is radially, inwardly contiguous to the blade ring between this hub part and the housing. A cleaning of the machine is rendered possible in that a supply line is provided in the area between the hub bore and the blade ring on the housing of the side channel machine. Through this supply line, a flushing fluid that will flow through the sealing gaps can be introduced into the housing.

Abstract: A multi-stage centrifugal pump is described having a linear series of impellets mounted on a common impeller shaft, with axial thrusts imparted to the shaft by the impellets being balanced by a sealed high-pressure thrust bearing assembly secured to the pump casing. The pump is particularly suitable for using in pumping an abrasive fluid. A clean lubricating oil is supplied to the thrust bearing assembly at a pressure slightly greater than that of the abrasive pumped fluid, to ensure that the fluid that migrates across a mechanical seal interposed between the impeller assembly and the thrust bearing assembly is the lubricating oil, not the abrasive pumped fluid. High pressure differentials across a breakdown bushing involving the abrasive pumped fluid, and a resulting wear and erosion of pump components, thereby are avoided.

Abstract: A vertical shaft type pump including a bearing device in which water in the pump is utilized as lubricating water without supplying water to the bearing from the outside of the pump, thereby repeatedly conducting no-load operation in the air (in such a state that water is not pumped) stably for a long period of time. In the pump, a water storage tank upwardly opened is fixed to a rotary shaft, and the lubricating water (the water in the pump) is retained within the water storage tank so that the bearing is operated while being always soaked in the lubricating water. Also, foreign substances in the water storage tank are mixed with the water without deposition, and the water containing the foreign substances is replaced by the newly pumped water.

Abstract: A magnetically coupled centrifugal pump comprising a pump housing containing a pumping chamber and having an inlet and an outlet, a shaft mounted in the pump housing for rotation, a pump impeller attached to the forward end of the shaft for rotation with the shaft in the pumping chamber and a first magnet attached to the rear end of the shaft, the first magnet adapted to be magnetically coupled to a second magnet rotated by a rotary driving device, the shaft being mounted in at least two bearings spaced from each other along the length of the shaft and located between the impeller and the first magnet, a shell surrounding the shaft bearings and first magnet to seal the pump from the exterior and prevent the pumped fluid from leaking, the shell being located between the two magnets and being able to transmit magnet forces between the two magnets for magnetically coupling the two magnets together, the pump housing containing a passage for conducting cooling fluid from the discharge of the pump impeller to the b

Abstract: A canned motor has a housing and a motor shaft which extends through the housing. A rotor is fixed to the shaft and is located in a rotor compartment within the housing. The rotor compartment has a flow path for circulation of a cooling and lubricating fluid through the compartment. A sleeve surrounds the shaft upstream of the flow path and is surrounded by a second sleeve. The two sleeves cooperate to define a gap which serves as a filter for fluid entering the rotor compartment. The minimum height of the gap is smaller than the minimum height of the flow path to prevent suspended solid particles which can obstruct the flow path from entering the latter. The sleeves are composed of a hard material so that oversized particles can be ground down by causing the fluid to repeatedly bring the particles into contact with the sleeves.

Abstract: Apparatus and method for making an immersed fuel transfer pump free of possible sources of ignition for fuel-vapor mixtures when the pump is run dry. The bearings and face seals are cooled by hydraulic oil used to power the pump, preferably through connecting the case leakage port on a conventional multiple piston type hydraulic motor to the pump as a supply and ducting the leakage through the bearings and near the seals on its way to the reservoir. An auxiliary pump built into the centrifugal pump shaft increases flow over these critical parts via a closed loop. Leakage past the dynamic face seals is led overboard through a flame-quenching passage.

Abstract: A turbocompressor shaft seal, especially for a high-pressure turbocompressor, has each of its gas-side and atmosphere-side slide rings biased toward a rotor ring of the shaft and associated with blocking-liquid compartments which are interconnected by an annular passage around the rotor ring. The compartments are connected in a closed circulation path with a circulating pump and a cooler and leakage liquid is returned by a feed pump to the liquid circulation with the aid of a pressure transformer biased on one side by the gas pressure to be sealed and an adjustable spring force and, on the other side, by the pressure of the blocking liquid.

Abstract: A centrifugal supercharger includes a housing, an input shaft rotatably supported on the housing, a pulley related with one end of the input shaft, an output shaft rotatably supported on the housing, a compressor rotor fixed to one end of the output shaft, a cover located around the compressor rotor, and fixed to the housing, and forming a supercharging passage, an rotating speed step-up device connecting between other end of the input shaft and other end of the output shaft, an oil-supplying device integrated with the step-up device, and a distributing device faced with the oil-supplying device, and formed on the housing.

Abstract: A cooling system for centrifugal pump bearings and seals for use with a centrifugal pump having a housing containing a pumping chamber and a rotating impeller within the pumping chamber, a passage being formed in the housing, the passage receiving fluid from the pumping chamber and directing the fluid thereby providing cooling fluid flow, and an arcuate groove formed in the housing in fluid communication with the passage, a first end of the groove being adjacent the passage, a second end of the groove being distal of said passage, the groove having a depth which varies from the first end to the second end, the depth at the first end being greater than the depth at the second end.

Abstract: A turbocompressor shaft seal, especially for a high-pressure turbocompressor, has each of its gas-side and atmosphere-side slide rings biased toward a rotor ring of the shaft and associated with blocking-liquid compartments which are interconnected by an annular passage aroung the rotor ring. The compartments are connected in a closed circulation path with a circulating pump and a cooler and leakage liquid is returned by a feed pump to the liquid circulation with the aid of a pressure transformer biased on one side by the gas pressure to be sealed and an adjustable spring force and, on the other side, by the pressure of the blocking liquid. The surface area ratio K between the area of the atmosphere-side slide ring biased by the blocking liquid pressure toward the rotor ring and the sealing area of the atmosphere-side slide ring is substantially 0.45 to 0.60, the thermal conductivity of the slide rings and rotor rings is greater than 250,000 N/mm.sup.

Abstract: A heat exchange device for pump stuffing box in which cooling liquid enters the inlet of the stuffing box, cools it and then enters seal chamber as a lubricant. Only one inlet and outlet port is necessary to provide flow for cooling and lubrication of the stuffing box and seal chamber.

Abstract: A blood pump includes a housing an inlet and outlet communicating with a pump chamber. A rotor received in the pump chamber is rotated by a drive motor. A drive shaft extending between the motor and rotor passes through a seal which is purged from the non-blood side by fluid. The fluid side of the seal contains a pumping element to modulate the fluid pressure, thereby controlling the purge fluid flow.

Abstract: A pump suitable for food products containing solid pieces has a rotary turret (11) incorporating four piston and cylinder pumping units (15) spaced uniformly around the rotation axis. The pistons are reciprocated by a stationary cam (8) and have associated with them rolling diaphragms (35) which separate pumping chamber (40) from chamber (41) which are connected to a vacuum source. The cylinders are closed by a rotor end member (50) journalled on a manifold member (60) and provided with fluid ports (51). A sealing ring (65) of low friction material forms a seal with the end face of member (50) and includes slots for connecting the ports (51) alternately to supply and discharge conduits (55, 56) for the product passing through the pump. The sealing interface between member (50) and ring (65) is surrounded inwardly and outwardly by a cavity for receiving barrier fluid, e.g. steam, under pressure.

Abstract: The invention relates to an axial flow pump installation and utilizes a motor for transmitting a torque to a rotary shaft extending from the motor to a bearing house. Mounted within the bearing house and circumferentially engaging the motor are a pair of thrust bearings and a radial floating bearing spaced a distance above the thrust bearings. A thrust retaining tube press fit between the floating bearing and the pair of thrust bearings retains the pre-determined distance between those bearings. The lower, thrust bearings bear a primary shaft thrust load, while the upper, floating bearing minimizes vibration of the shaft. A lubricant circulation passageways are formed for continuous circulating of the lubricant from a high pressure side to a low pressure side of a pump.

Abstract: A rotary compressor of the invention comprises an oil separating portion and an oil collecting portion located adjacent one end of a rotary shaft closely to a motor. An oil is separated through the oil separating portion and collected in the oil collecting portion in which the one end of the rotary shaft is submerged to lubricate a third bearing. The oil separating portion serves to separate oil mist which flows with gas flow. The one end of the rotary shaft is submerged in the oil as collected in the oil collecting portion under the influence of gravity to lubricate the bearing. This arrangement provides stable lubrication of the one end of the rotary shaft. The bearing is, thus, highly reliable while the rotary compressor is running at any speeds. Also, vibrations of the shaft can substantially be reduced particularly when the rotary compressor runs at a high speed.

Abstract: The invention is a centrifugal pump having an outer housing defining a pumping chamber. An impeller is rotatably positioned in the chamber for pumping a fluid. The impeller is mounted on the first end of a rotatable shaft. A journal bearing is positioned in the outer housing and disposed coaxially around the shaft. A small clearance space is present between the shaft and the journal bearing. The clearance space is in communication with the chamber whereby the fluid being pumped by the impeller is directed to said clearance space and the fluid provides the lubrication for the journal bearing. The impeller of the pump is moveable in the pumping chamber and positioned adjacent a first wall of the pumping chamber. An inverted tub is secured to the second end of the shaft and extends over a portion of the outer housing where the shaft is located. A drive belt engages the outer periphery of the inverted hub to rotate the inverted hub and impeller.

Abstract: The rotary drive shaft of a centrifugal pump extends vertically through a cylindrical housing and into a casing defining a bowl for the impeller of the pump. A mechanical seal and bearings for the drive shaft are positioned between the pump bowl and the interior of the housing which forms a reservoir for liquid lubricant. The impeller includes a radial shroud plate, a first set of pumping blades projecting downward from the shroud plate toward the axial pump inlet and a second set of blades or vanes projecting upward from the shroud plate. The upper vanes result in slight suction being generated in the area of the seal tending to draw lubricant from the housing reservoir through the bearings and seal. Seal failure is detected by a rapid decrease in the level of lubricant in the reservoir.

Abstract: A combined air-hydrogen turbo-rocket engine is disclosed having a simplified construction in which the hydrogen driven turbine is formed integrally with the rotor wheel of the axial air compressor stages. The rotor stages are located downstream of a stator vane structure and are driven by gaseous hydrogen passing across the turbine blades. The hydrogen is subsequently injected into an air duct surrounding the axial air compressor and defining an airflow path having an air inlet. The hydrogen-air mixture is ignited and the burned gases are expanded through a converging-diverging exhaust nozzle.

Abstract: A method of treating a surface of a machine element to permit the outer layers thereof to freely expand when repeatedly subjected to sudden temperature variations without thermal stressing the inner layers thereof.

Abstract: Method and apparatus for cooling shaft seals of a turbine-generator system which includes a hydrogen inner-cooled generator having a stator with a cylindrical core and a rotor mounted for rotation on a shaft within the cylindrical core, a turbine coupled to the shaft at one end of the generator, an exciter coupled to the shaft at the other end of the generator, and a pair of seals each of which surround the shaft at both ends of the generator for substantially minimizing a leakage of hydrogen therefrom. Each of the seals includes a seal ring with a hydrogen side and an air side, and a closed loop oil supply is provided for each such side. One closed loop oil supply supplies oil to the hydrogen side of each of the seals, and another closed loop oil supply supplies oil to the air side of each of the seals, and both oil supplies are coupled within a heat exchanger for exchanging heat between the two closed loop oil supplies.

Abstract: A drive device for pumps consists of a drive pulley to drive a shaft. The shaft assembly includes an inner bearing seated in the housing bore, an outer bearing seated on a neck of a pump cover, a cover disk with an outer edge, covering the outer bearing and the neck of the pump cover laterally from the outside and is connected to the drive pulley, and a center of the shaft, a spring for the automatic play eliminating adjustment of the radial and axial load-supporting outer and inner bearing.

Abstract: A pump having a heat exchanger including a rotating baffle sleeve secured to the pump shaft. A seal baffle on the rotating baffle sleeve extends over the pump seal assembly cartridge. A cooling cylinder containing circulating component cooling water is suspended within the rotating baffle sleeve and defines a flow passageway therein for cooling heated product water, before the product water contacts the shaft seal. A seal injector distributor ring uniformly distributes seal injection water to the seal. A thermal shield in the heat exchanger reduces thermal stresses in the heat exchanger. A slotted or grooved keyway spacer ring facilitates replacement and alignment of a hydrostatic bearing.

Abstract: A centrifugal pump includes a rotating impeller for accelerating low pressure inlet fluid to a substantially tangential high pressure fluid. A pair of floating rotatable shrouds flank opposite axial sides of the rotating impeller. Pressurized hydrostatic bearings back the shrouds to float and support the shrouds in a uniform fashion. Pressurization for the hydrostatic bearings can come from the high pressure fluid side of the pump.

Abstract: An idler disk for reducing fluid drag forces in a machine having a rotating component is disclosed. An outer housing is provided for the machine and a cavity is defined in the outer housing. The cavity has opposed side walls. A rotatable component is positioned in the cavity and the rotatable component is spaced apart from the side walls of the cavity. At least one freely rotatable idler disk is positioned in the cavity and the idler disk is in spaced apart relationship with the rotatable component and the side walls of the cavity. The idler disk extends in the cavity along at least a portion of the length of the rotatable component. The idler disk is caused to rotate in the same direction as the rotatable component by the rotating fluid in the cavity. The fluid is caused to rotate by the rotation of the rotatable component. The rotating idler disk increases the speed of the fluid rotating adjacent the rotatable component and thereby reduces the fluid drag on the rotatable component.

Abstract: A gas bearing including a support having a longitudinally extending cylindrical bore, of a predetermined diameter and an elongated generally cylindrical shaft rotatable within the bore of the shaft being of a predetermined diameter less than the diameter of the bore in the support. The outer surface of the shaft is uniquely provided with a plurality of circumferentially spaced, longitudinally extending recesses of a predetermined depth, each of which defines an elongated, generally radially outwardly extending step of a predetermined height. The outer surface of the shaft is also provided with a plurality of circumferentially spaced, longitudinally extending grooves of a predetermined depth disposed proximate the steps.

Abstract: The scavenge oil system disclosing the invention has a scavenge oil outlet located at the bottom of a blower housing whereby lubricating oil can flow thereto by gravity in most attitudinal positions of the housing. When the blower housing is in an attitude that a portion thereof, such as the rear, is at a level lower than the scavenge oil outlet, a scavenge pump, having an impeller driven by the blower shaft, is rendered effectively operable by having an inlet beneath the level of oil at the rear of the housing and the scavenge pump pumps the oil to a higher level whereby it may flow from the housing by gravity through either the scavenge oil outlet of the housing or through other passages.

Abstract: A gas circulator, e.g. for circulating a coolant gas in a nuclear power station, the circulator comprising a shaft (34) rotatable about its axis, circulation blades (54, 56) mounted adjacent one end of the shaft for rotation in the coolant gas, a first bearing, (32), in the form of an active magnetic bearing adjacent one end of the shaft, a seal mounted around the shaft between the first bearing and the blades to prevent the circulating fluid from entering the first bearing, a second bearing (32) in the form of a fluid lubricated bearing spaced from one end of the shaft and a motor to rotate the shaft, the second bearing having a journal bearing portion and an axial thrust bearing portion.

Abstract: A centrifugal pump having a shaft supported by a hydrostatic bearing to which energizing fluid is supplied by the pump itself. Upon failure of the energizing fluid supply, an auxiliary source supplies the energizing fluid. A one way valve operates in response to fluid pressure to permit the energizing fluid, either from the pump or the auxiliary supply.

Abstract: A pump is disclosed for pumping a volatile fluid having a given vapor pressure. The pump of this invention comprises a pump housing comprising an inlet for introducing the liquid at a relatively low static pressure level into the pump housing and an outlet for discharging the liquid from the pump housing at a relatively high static pressure level. A fluid path extends from the inlet to the outlet. A booster stage impeller is rotatively mounted for drawing the fluid through the inlet and for pumping the fluid along the fluid path with an increased kinetic pressure. A diffuser is affixedly disposed within the pump housing to intercept the fluid directed along the fluid path by the booster stage impeller for converting the kinetic pressure imparted to the fluid into increased static pressure.

Abstract: Inside the sealing shroud of the centrifugal pump there is located an inner rotor driven by a drive motor, while an outer rotor which is connected to the pump impeller is located outside of the sealing shroud wall. At least the sealing shroud wall is formed of a material which is electrically non-conductive. The efficiency is improved. Materials not normally used in sealing shrouds, such as ceramics, can be used for the same and this increases the usefulness or fields of application of the pump.

Abstract: An improved seal for a generally cylindrical pump case provides an internal seal between the case and the head for preventing the flow of fluid between them. The improved seal includes a flexible annular responsive means attached or unattached to the head and carrying a resilient annular seal member. Increasing pressure within the pump case forces the flexible annular pressure responsive means into engagement against the interior surface of the case preventing extrusion of the resilient annular seal member when the case is pressurized, thus providing a more efficient fluid tight seal.

Abstract: A centrifugal pump seal for providing a liquid seal to a vertically oriented pump drive shaft, including a bellows seal fixedly attached to the drive shaft and having a rotatable sealing ring as a part thereof, mated to a fixed sealing ring held in a seal housing, and a seal chamber surrounding the bellows seal and shaft, for containing pump liquid, wherein the fixed and rotatable seal rings and a portion of the seal housing are exposed to liquid contact for cooling, including a recirculating bleed line for continuously replenishing the liquid in the seal chamber.

Abstract: A turbine engine is constructed to passively modulate the flow of cooling air into the shroud. Sealing rings are disposed relative to the cooling air inlets in the shroud such that pressure and temperature variations in the engine will cause the cooling air inlets to be either fully opened, completely blocked by the sealing ring, or modulating therebetween in accordance with the cooling needs of the shroud.

Abstract: A multistage hydraulic machine including a main shaft, a main shaft sealing device, and plural runners mounted on the main shaft and containing water at different pressure levels. A top cover is mounted on the highest pressure stage runner and in the space therebetween there is provided a labyrinth-type intermediate sealing device which defines a first space between the cover, the intermediate sealing device, and the runner and a second space between the intermediate sealing device, the cover and the main shaft. Exhaust passages are provided in communication with the first and second spaces for exhausting compressed air during changeover from one operation to another. The second space exhaust passage is capable of communicating with a lower pressure runner. The intermediate sealing device and the exhaust passages prevent water at the pressure of the highest pressure runner from communicating with the main shaft sealing device.

Abstract: A centrifugal pump for the circulation of fluid, comprising a flow-chamber through which passes an inlet neck and which is bounded at the opposite side from the latter by a cross wall, a rotor mounted at the end of a drive shaft located in prolongation of the axis of the inlet neck, and a stator comprising an outer toroidal shroud located in prolongation of the outer shroud of the rotor, the latter being surrounded by a fixed part for connection between the end of the inlet neck and the outer shroud of the stator. The rotor is guided axially by a hydrostatic bearing consisting of a journal which is arranged on the upstream portion of the outer shroud of the rotor and cooperates with a bearing arranged on the part for connection of the stator to the inlet neck, the bearing comprising a plurality of bearing pockets placed in communication with the flow chamber and thus fed by the fluid flowing through the pump at the pressure prevailing in the flow chamber.

Abstract: A turboexpander compressor for use in a gas processing system has a seal system that avoids communication of gas with the oil being pumped through the bearings. The device has a shaft carried in a housing on bearings with a compressor wheel on one side and an expander wheel on the other side. Labyrinth seals seal the wheels from the interior of the housing and the bearings. Mechanical seals are located between the bearings and the labyrinth seals for preventing leakage of oil. The mechanical seals are located in a drainage chamber that allows any oil or gas leaked past the seals to be drained from the system, rather than dilute the oil. Gas is injected from the compressor discharge into a groove on the expander side of the shaft to provide a thermal barrier. The mechanical seals each have a rotating ring carried by the shaft and a nonrotating ring carried by the housing. The nonrotating ring is biased into the rotating ring by means of an O-ring.

Abstract: Several means for providing superheated steam varying in pressure and temperature in a plurality of cavities serially disposed between blade discs of a steam turbine in which steam flows from a high pressure to a low pressure portion and improved seals disposed at the radially outer periphery of the cavities which cooperate with the means for providing superheated steam in the cavities to eliminate moisture in the cavities and eliminate stress corrosion in the blade discs.

Abstract: Apparatus and method for making an immersed fuel transfer pump free of possible sources of ignition for fuel-vapor mixtures when the pump is run dry. The bearings and face seals are cooled by hydraulic oil used to power the pump, preferably through connecting the case leakage port on a conventional multiple piston type hydraulic motor to the pump as a supply and ducting the leakage through the bearings and near the seals on its way to the reservoir. An auxiliary pump built into the centrifugal pump shaft increases flow over these critical parts via a closed loop. Leakage past the dynamic face seals is led overboard through a flame-quenching passage.