Abstract: A method and apparatus for supplying lubricant to turbine bearings during normal and abnormal operating modes. A pump coupled to the turbine's rotor discharges lubricant during normal turbine operating modes through an ejector from its inlet port through its outlet port. The lubricant transmitted to the ejector's inlet port is mixed with lubricant withdrawn from a lubricant reservoir during its transmission through the ejector and such mixture is discharged from the ejector's outlet port at a supply pressure. The lubricant mixture is routed to the turbine bearings and the lubricant pump's suction side. When the supply pressure falls below a predetermined value, a clutch is engaged which couples a constant speed drive input linkage to the turbine rotor. The constant speed drive also has an output linkage whose speed is maintained at a constant predetermined value for varying rates of speed on the input linkage. The output linkage is coupled either to an auxiliary lubricant pump or an electrical generator.

Abstract: A gas turbine engine has a turbine which includes an annular array of rotary aerofoil blades surrounded by an annular shroud member. All or a major portion of the annular shroud member is constituted by a heat pipe. A distance measuring device is provided to measure the clearance between the tips of the rotary aerofoil blades and the shroud member and its output is monitored by a control unit. The control unit is adapted to control a valve which regulates the flow rate of cooling air directed onto the heat pipe. The arrangement is such that the temperature of the heat pipe is maintained at a level which is consistent with the clearance between the rotary aerofoil blade tips and the annular shroud member being within a predetermined range of values.

Abstract: A compressor case structure capable of enhanced active clearance control within the structure is disclosed. Various construction details which enable the discharge of cooling air against the case and which minimize thermal distortion of the case are developed. The concepts are applied to a longitudinally split compressor case and include an external bleed manifold or circular cross section which extends across the longitudinal split in the case. Cooling air is dischargeable beneath the manifold to cool the case structure.

Abstract: Steam generation means in a closed system having a pressured steam boiler positioned within a closed heated feed water chamber. The steam generated in the boiler is used to drive a turbine and an associated electrical generator whose output augments the outside primary source of electrical power which is fed to one or more electrical resistance units located in the boiler. The exhaust steam from the turbine at reduced pressure is used to supply heat in any closed steam consuming device such as a space heating system. The condensate is returned to the feed water chamber where it is held in preheated condition ready to be pumped into the boiler to maintain the boiler water level. The efficiency of the system is substantially increased by having means for raising the temperature of the turbine and turbine housing thereby to lessen the temperature drop of the steam entering and leaving the turbine.

Abstract: A centrifugal pump and a pumping system that recover hydraulic energy in response to flow capacity reduction and spontaneously provide a recirculating flow at low capacities when pump cooling is needed. From a upstream source the fluid is guided by two suction lines to two parallel pumping mechanisms housed by a common discharge casing. Said pumping mechanisms have a combined hydraulic characteristic that the first pumping mechanism will force a reverse flow through the second pumping mechanism, when pump discharge is reduced by the system below a certain low flow rate. The reverse flow will then return to the upstream fluid source through a suction line. The pump is thereby protected from overheating by a circulating flow at low flow capacities. At the same time, said reverse flow generates a turbine action on the second pumping mechanism and transmits the contained hydraulic energy back to the rotor and thereby results in power saving at low flow capacities.

Abstract: One end of a casing in which a rotating shaft is supported by a floating metal bush is extended to surround the outer periphery of an oil thrower formed adjacent to an end of the shaft so that an oil-thrower space is defined by the shaft, the oil thrower, the casing and the floating metal bush, and an arcuate opening is formed through the wall of the casing so that the lubricating oil trapped in the oil-thrower space is discharged through this opening to an oil outlet.

Abstract: A device for adjusting the clearance between moving blades and the ring of a turbine wherein the ring includes a cylindrical sleeve, a perforated partition, and a wall, which together form an enclosure. Boreholes receive tubular elements which fit together with coaxial boreholes provided in opposite walls of a distribution chamber. The chamber communicates with pipes which admit heat regulating air. Alternating tubular elements traverse the perforated wall and the chamber to evacuate exhaust gas through pipes.

Abstract: A bearing for turbojet engines, placed between a high pressure journal and a low pressure journal is in the form of a roller bearing with rollers, and an inner bushing and an outer bushing, all contained in a box mounted on the low pressure journal. A nut maintains the bushing on the high pressure journal and has an annular recess arranged to receive oil through an inlet dividing it by means of vanes, through axial holes on the bushing, toward the roller bearing for its lubrication and cooling, and through radial holes, by means of the centrifugal effect, to an annular collector formed in the box. The collector has a plurality of stabilizing vanes and its radial height determines the feed pressure, by means of calibrated holes in the box, of a film of oil in an axial space constituted between the bushing and the box, in order to assure therein the damping of vibrations.

Abstract: A fluid-locked shaft seal comprises a housing with a shaft rotating therein having a seal ring affixed thereto for rotation therewith. A packing ring is disposed in the housing around the shaft and is fixed radially in respect to the shaft but is held by flexible means which permits its axial movement to some extent. A slide ring in the housing around the shaft is located between the seal ring and the packing ring and connected to the shaft for rotation that is substantially half the speed of rotation of the shaft. A pump rotor is formed with the seal and disposed on the side of the seal ring which is adjacent to the slide ring and generates a fluid flow in a deflecting channel which is defined in the housing by slide ring and the seal ring. A plurality of stationary impellers are disposed in the deflection channel and the slide ring has a turbine portion disposed in this channel.

Abstract: A turbine intermediate case in which the outer case element carries a series of inwardly extending struts that position the bearing support centrally within the outer case element and these struts support the inner case element within and in spaced relation to the outer case element. The inner case element carries seals at opposite ends, a diaphragm and a support ring for the row of turbine vanes downstream of the case. The struts provide a vent for the air cavity formed by the diaphragm and carry a baffle to control heat transfer between strut and vent air.

Abstract: A movable blade pump including an actuating mechanism for imparting rotational movement to blades which mechanism is contained in an impeller boss sealed against the outside and filled with hydraulic fluid and is driven by a hydraulic cylinder device secured to a suction casing below the impeller boss. Feed and discharge of hydraulic fluid into and from the hydraulic piston device are effected through fluid passages formed in the suction casing and a fixed mounting for the hydraulic fluid device, and the blades are set at any angular positions within the range of the stroke of the piston.

Abstract: The system comprises a conventional oil/gas separator, with an oil supply line extending from the separator oil reservoir for conducting oil to a machine (such as an associated gas compressor, or the like), and a gas/oil vapor line communicating with the gas chamber of the separator, for conducting oil vapor-laden gas thereto (from such a compressor, or like machine). In an embodiment of the improvement, a check valve is interposed between the oil supply line and the reservoir to prevent oil flow from the line to the reservoir, and a by-pass line, having a pilot-pressure-closed, normally-open valve interposed therein, is coupled between the oil supply line and the gas chamber. The valve senses chamber pressure and, when the latter is sufficiently diminished, opens the by-pass line to evacuate the oil supply line (and oil cooler and filter) into the separator.

Abstract: A turbomachine seal system includes first and second seal members spaced axially about the shaft to define therebetween a first annular chamber. One of the seal members limits the flow of oil from a first portion of the turbomachine towards a second portion thereof. The second seal member limits the flow of process gas from the second portion of the turbomachine towards the first portion thereof. Pressure reducing means is connected to the chamber for reducing the pressure therein below the pressure in the first and second portions of the turbomachine for preventing oil from flowing from the first portion from migrating into the second portion.

Abstract: A centrifugal pump is provided having a housing, a pump chamber in said housing, a pumping impeller in said pump chamber, a rotatable shaft extending through said housing into said chamber carrying said impeller, a packing box in said housing surrounding the rotatable shaft adjacent the pump chamber, a rotatable sleeve removably fixed on said shaft extending from said impeller through said packing box and rotating with said shaft, a stationary sleeve in said housing extending from said packing box to a point adjacent said impeller and surrounding a portion of said rotatable sleeve between said packing box and impeller, packing means in said packing box surrounding said rotatable sleeve, said packing box being surrounded by a liquid being pumped by said impeller over a major portion of its outer surface, and a continuous pressure lubricant source connected to said packing box supplying continuous lubrication between the rotatable sleeve and stationary sleeve.

Abstract: A pump for fluid media, with an inner pipe or tube arranged in a housing. A drive shaft is journalled in the inner tube, and a rotor is arranged in the housing. The rotor has a main body which is secured to the drive shaft and is provided with conveying blades for the medium. The rotor has a turbine or pump operating counter to the transporting or conveying direction of the conveying blades. At least one passage is arranged in the main body and extends from the pressure side to the suction side of the rotor, with the passage being connected with a suction gap on the inner tube.

Abstract: Clearance control means is provided for a gas turbine engine. In one embodiment relating to compressor blade clearance, means is provided for developing a first signal representative of the actual compressor casing temperature, a second signal representative of compressor inlet gas temperature, and a third signal representative of compressor speed. Schedule means is provided for receiving the gas temperature and compressor speed signals and developing a schedule output signal. The schedule output signal is representative of a reference casing temperature at which a predetermined compressor blade stabilized clearance is provided. Means is provided for comparing the actual compressor casing temperature signal and the reference casing temperature signal and developing a clearance control signal representative of the difference therebetween.

Abstract: A turbine intermediate case in which a turbine bearing support and an inner case are supported centrally within an outer case by radially inward extending hollow struts. An inner case carrying a diaphragm and seals which defines a vent cavity surrounding a bearing compartment. Air leaking past seals is collected in this vent cavity and flows through the hollow struts to be utilized for impingement cooling of the outer surface of the outer case.

Abstract: Disclosed is an oil seal device using oil seal rings and a centrifugal oil thrower and having a construction such that the oil seal rings are provided on each side of the oil thrower to minimize the amount of oil that leaks to the oil thrower.

Abstract: A seal member for a gas turbine engine is disclosed. Various construction details which increase sealing effectiveness and which enable the damping of vibrations in a plurality of vanes are developed. The seal member is disposed between the engine case and a plurality of stator vanes. The seal member has a flexible center section which is compressed in the installed position.

Abstract: A system and method are disclosed for processing an oxygen-containing gas for use in a chemical process producing a generally inert gas. A fluid handling rotor is carried by a rotary shaft for effecting a pressure change in the oxygen-containing gas. A housing surrounds the rotor and the adjacent portion of the shaft. A bearing, axially spaced from the rotor, supports the shaft in the housing for rotation. Lubricant is injected into the bearing and is caused to flow through the bearing and axially toward the rotor. A seal surrounds the shaft intermediate the rotor and the bearing and seals between the shaft and housing. A generally inert seal gas is extracted from the products of the chemical process and injected into the seal under a pressure greater than the pressures within the housing on either side of and immediately adjacent the seal.

Abstract: A bulb type turbine generator in which upper and lower stay vanes house upper and lower oil tanks. The upper oil tank is connected to the rotary shaft bearing portion of the generator through an oil conduit and the lower tank is connected to a bearing portion. The oil conduits are disposed in the interior of the outer case so that oil passing through is cooled by the fluid flow. The outer casing together with the upper and lower stay vanes are divided to facilitate transportation and installation.

Abstract: A continuous 360.degree. impingement baffle is attached directly to a shroud support structure such that the combination provides a low-leakage, high pressure plenum for supplying impingement airflow to the turbine rotor shroud for cooling purposes. After impingement, the air is at a low-pressure and is free to feed the conventional leakage paths with little loss of system efficiency.

Abstract: An oiling system in turbo and like machinery providing cooling, lubricating and fluidized damping functions. A rotor shaft operates in connection with a reservoir of lubricating oil, and with a lubricant supply mechanism, to supply oil to the shaft bearings in an amount properly to cool and to lubricate shaft bearings despite adverse effects of high speed, relatively high temperature operation. At the same time, and along paths of flow leading to and through the shaft bearings, oil films are established and maintained damping attempted vibratory and like dynamic behavior in the rotor shaft.

Abstract: Hydraulic turbo machines including pumps and pump turbines having pivotally adjustable wicket gates are vulnerable to damage caused by the ingress of dirty water containing abrasive particles into the bushings in which the stems of the wicket gates are pivotally supported in the headcover and bottom ring. This problem is overcome by the provision of individual seals between the end of each wicket gate and an adjoining surface portion of the headcover or bottom ring in which the bushings are located. In addition, seal water at a pressure in excess of machine operating pressure forces the seal ring into contact with the end of the wicket gate and also causes a slight flow of clean water outwardly between the seal and the respective end of the wicket gate, so as to keep the seal entry zone flushed clear of particulate material.

Abstract: A compressor structure for a gas turbine engine capable of enhanced active clearance control within the compressor is disclosed. Various construction details which enable the discharge of cooling air against the compressor case and which minimize thermal distortion of the case are developed. The concepts are applied to a longitudinally split compressor case and include an external bleed manifold of circular cross section which extends across the longitudinal split in the case. Cooling air is dischargeable beneath the manifold to cool the case structure. Heat shields are provided in access ports to the manifold to inhibit heat transfer to the compressor case at the local regions of the ports.

Abstract: A gas turbine engine in which a centrifugal diffusor is located downstream of a centrifugal compressor. The compressor air flow from the centrifugal diffusor is deflected into an axial direction by a substantially 90 degree elbow. The air flow is further decelerated in an axial-flow stator cascade upstream of the combustion chamber. A main bearing of the gas generator is arranged immediately downstream of the centrifugal compressor. This bearing is supplied from the outside through vanes of the axial-flow stator cascade. The axial-flow stator cascade is divided into groups of vanes, so that each group had a number of relatively small guide vanes and one relatively large guide vane. The small guide vanes are designed from the view point of fluid mechanics consideration, while the larger guide vane of a group is hollow for supplying the bearing. The large guide vane has a substantially longer and a substantially thicker vane profile than the small vanes.

Abstract: A gas turbine engine has an engine casing surrounding the turbine section and an internal chamber or jacket which separates the casing from blade tip seals supported by the casing. To maintain an adequate clearance between the turbine blades and the seals during engine startup and acceleration, a portion of the hot combustion gases passing through the turbine blades is bled through the chamber in heat exchange relationship with the casing. The hot gases expand the casing at a faster rate than otherwise to approximate the thermal growth rate of the turbine rotor and maintain a adequate clearance between the turbine blade tips and seals. During steady-state operation relatively cool air bled from the compressor is ducted through the chamber to cool the engine casing and hold the proper clearance between the blades and the seals.

Abstract: The invention relates to a self-priming centrifugal pump that consists of at least one fully-loaded pump or turbine stage with a horizontal shaft and one priming or ventilator stage that is fixed to the same shaft outside the main delivery stream, in the form of a lateral channel or liquid ring pump. In certain specific applications there is no flow through the ventilator stage during normal operation of the pump, and for this reason the ventilator stage is not cooled. The ventilator stage is cooled by virtue of the fact that the suction side of this stage is not only connected to the suction area of the fully loaded turbine stage, in which the gases that are to be removed usually collect, but is also connected to the pressure side of the pump, so that during normal operation a stream of liquid that has a cooling action is formed, and this passes by the suction opening of the ventilator stage.

Abstract: A turbine shroud assembly includes an expansion control ring to support segmented rotor shrouds. The expansion control ring is restrained by adjacent manifold rings, yet free to thermally expand radially outwardly without loss of axial alignment with the associated turbine wheel. The ported manifold rings are positioned on either side of an outwardly extending leg of the expansion control ring to direct cooling fluid delivered thereto toward the expansion control ring. A spacer ring surrounds the expansion control ring and restrains the expansion control ring relative to the manifold rings. The spacer ring maintains axial alignment of the expansion control ring with the turbine wheel. Cooling fluid is exhausted into the main hot gas stream, both upstream and downstream of the turbine wheel thus substantially preventing hot gases from affecting the expansion control ring.

Abstract: Regulation of cool air admitted internally of a gas turbine engine into an annular space defined by the double wall construction consisting of the case and the outer air seals serve to control the leakage in and out of this space and the temperature of the engine case. Thus, the temperature range between the hot gas stream and the cool air acting on the engine case controls shrinkage and expansion of the case which in turn positions the seal relative to the tip of the rotating blades, which can be manifested as a function of engine power or other parameters.

Abstract: A timing valve is responsive to certain hydraulic rotor speed input signals so as to schedule increased temperatures of air to a turbine shroud support in accordance with the thermal time constants of the rotor. Clearance between the rotor and the shroud is thereby minimized during both transient and steady-state operating conditions. Temperatures are incrementally increased by selectively combining air from the compressor fifth and ninth stage bleed manifolds. Under certain operating conditions, the timing valve is pre-empted and air is provided at a predetermined temperature level as a function of rotor speed only.

Abstract: Cooling airflow to the shroud support apparatus is varied in response to both rotor speed and elapsed time above a predetermined level by the selective use and mixture of two air sources at different temperatures. For steady-state operation, each of four different operating modes has its prescribed cooling air delivery mode such that, generally, as the engine speed and cycle temperatures increase, so does that of the cooling air. For transient operation, a timer is employed to sequence the desired cooling air delivery modes in such a manner as to maintain optimum rotor-to-shroud clearances during the transient period.

Abstract: An air cooled gas turbine engine includes a coolant flow control valve for regulating flow of compressor discharge air to a turbine rotor in accordance with compressor discharge pressure and the operating temperature of an air cooled turbine component of the engine and wherein the coolant flow control valve is associated with a seal having a fixed stator member connected to a compressor frame and a movable labyrinth seal rotor driven in response to gas turbine engine operation to seal between high and low pressure regions; the coolant flow control valve including a pressurizable chamber formed by the stator member and an annular member secured between the stator member and a movable leaf spring valve element that is subjected to compressor discharge pressure to close the valve element at engine cruise conditions and wherein means are provided responsive to temperature of the turbine component to bleed the pressurizable chamber to cause the bellows to bias the valve element into an open position thereby to mod

Abstract: The invention concerns a rotation apparatus for use with a rotating machine having a drive shaft. The rotation apparatus comprises an auxiliary shaft positioned in spaced relation relative to the drive shaft. Radial and axial bearings rotatably support the auxiliary shaft. Step-down gearing interconnects the auxiliary shaft and the drive shaft so that rotation of the former drives the latter. A rotational start-up mechanism comprising a hydrostatic motor and overriding clutch is drivingly connected to the auxiliary shaft to drive the latter. The hydrostatic motor and overriding clutch are mounted within a bearing housing of the turbine. The turbine drives a pump for supplying lubricating oil to the turbine bearings. A conduit also connects the pump with the hydrostatic motor so that the motor is continuously rotated once the turbine has been started.

Abstract: Prior to bringing a fluid machine to the condition of spinning reserve for practicing a phase modifier operation or for producing a so-called standby condition which permits immediate switch-over to a power-generating or pumping-up operation, the water level in a runner chamber is forced down by supplying compressed air, and then the runner is driven to rotate in compressed air atmosphere. In this process, the water in a casing is gradually discharged at a rate which is commensurate with the rate of supply of the compressed air so as to thereby prevent leaking of the water in the casing from a guide vane.

Abstract: A pump bracket includes a two-part bracket housing with a heat exchanger mounted therein through which air can flow, the bracket being attached to, and between a motor and a pump. The shafts of the motor and pump are coupled together and a fan blower wheel is mounted on the motor shaft. A blower casing controls air flow to the suction side of the blower wheel. In one embodiment the casing channels incoming air from a portion of the exchanger to the suction side of the wheel which blows air out through the rest of the exchanger. In another embodiment air is drawn in through openings in the housing, directed to the suction side by the casing and blown out through the exchanger.

Abstract: A slinger arrangement whereby the lubricating oil supplied to a bearing of a turbine shaft may be prevented from being sucked through one or more seal rings into a blower when the pressure in the blower becomes negative.According to one embodiment of the present invention, the slinger consists of a large- and small-diameter sections, and a first seal ring is fitted into a circumferential groove formed in the large diameter section and contacts the lower end of first and second air vent chamber casings which is remote from a fan wheel, the first and second casings being axially spaced apart from each other and cooperating to define an air vent chamber, while a second seal ring is fitted into a circumferential groove formed in the small-diameter section and contacts the lower end of the other air vent chamber casing which is closer to the fan wheel. A circumferential oil throwing groove may be formed in the large-diameter section between the first and second seal rings.

Abstract: A turbosupercharger provided with means for preventing lubricant fatigue comprising a center housing having an inlet and an outlet for lubricant, a turbine casing mounted on said center housing at one end thereof, a compressor casing fixedly secured to said center housing at the other end thereof, and a turbine shaft rotatably mounted within said center housing, said turbine shaft having a turbine rotor at one end thereof within said turbine casing and a compressor rotor at the other end thereof within said compressor casing. The center housing has a chamber formed therein so as to receive lubricant slung out of the periphery of said turbine shaft and a communication hole formed therein to connect the inlet for lubricant with said chamber thereby injecting pressurized lubricant into said chamber through said communication hole.

Abstract: A seal system for sealing passage of a rotatable shaft through a wall separating adjacent regions subject to differential fluid pressures. The system comprises a flange on the wall circumferentially spaced from the shaft. A ring rotatable with the shaft includes an axially extending enlargement concentrically about the flange in engagement with the wall for slinging fluid away from the wall opening. A drain gutter radially outwardly from the enlargement collects fluid draining down the wall, and guides the same away from above the wall opening.

Abstract: An integral pump and drive shaft assembly in which the pump has a generally cylindrical side wall, a generally vertical back wall, and a front wall having an inlet opening; an impeller is rotatably mounted in the housing so formed and the impeller also includes a generally vertical rear wall and front wall and also an inlet eye centrally located in the front wall; the impeller also has a series of circumferentially space apart and curved vanes located between and fixed to its front and rear walls. A tubular coil heat exchanger is located in a forward portion of the pump housing whereby water entering the inlet opening passes over the heat exchanger. A diffuser is mounted on the rear wall of the pump housing and is concentric with the impeller; the diffuser also has a series of circumferentially spaced curved vanes for receiving water which is discharged from the impeller. The vanes of the diffuser are curved in a direction opposite to the direction in which the impeller vanes are curved.

Abstract: A seal design which is particularly suited for use between the rotating and stationary components of a machine is disclosed. Various construction details which increase the resistance to the flow of a fluid medium across the seal from a region of higher pressure to a region of lower pressure are developed. The seal design is built around conventional rotary seals, such as labyrinth or wide channel seals, and includes means for aerodynamically impeding the flow of the fluid medium approaching the upstream end of the seal.

Abstract: A turbomachine includes a casing having a rotor mounted therein. The casing includes an assembly with provisions for admitting a cooling medium. The assembly comprises a first member having opposed front and rear spaced, radially extending walls. A baffle member extends radially within a chamber defined by said spaced walls. The baffle member includes a plurality of equally spaced circumferential openings defining a fluid flow path for cooling medium injected into said chamber. If the fluid is in a saturated state prior to its injection into the chamber, the fluid is expanded into a superheated state at the chamber entrance. The fluid is directed by the baffle member to the outer diameter of the chamber, then radially inward through the flow path. The fluid exits from the first member through a circular gap having the top surface thereof defined by the lower inner surface of the rear wall of the first member.

Abstract: A high-speed pitot pump has a system for self-cooling the lubricant for the bearings supporting the rotatable casing of the pump. The lubricant is contained in a reservoir which is continuously cooled during operation of the pump. The pump has a rotatable casing cantilevered on a shaft in the pump housing. The lubricant cooling system includes blower means which rotate with the casing to draw cool air into the housing and force it through a discharge opening which directs the flow of cool air toward a heat exchanger, preferably a series of cooling fins projecting from an exterior wall of the reservoir.

Abstract: An improved system to eliminate a stuffing box or mechanical seal around the rotating shaft of a pump for liquids. The pump and its motor are hermetically sealed, and a pressurized gas pad maintains a liquid seal at the shaft entrance to the pump casing. A suction return line is provided from the seal liquid to the pump suction. A small flow of pumped liquid leaks past the shaft entrance into the seal liquid, then through the return line back to the pump suction. The gas pad and seal liquid are at slightly higher than pump suction pressure.

Abstract: A method is disclosed for admitting high pressure air to the seals of a hydraulic turbine runner which is rotating in a gas such as air. The high pressure air reduces the temperature of the seal and at the same time maintains a desired air pressure in the runner casing. Means are also provided to permit evacuation of air or gas from the runner casing to reduce the pressure therein below atmospheric pressure to decrease the windage losses of the rotating runner and permit lower pressure cooling air or gas to be applied to the runner seals.

Abstract: A flushing liquid system for an improved wearing ring in a centrifugal pump which wearing ring has spaced flushing liquid inlet and outlet chambers, has a first control assembly for supplying flushing liquid to the flushing liquid inlet chamber and a second control assembly for returning or draining at least a portion of the flushing liquid through the flushing liquid outlet chamber, with respective first and second control assemblies either having a predetermined setting or operatively responsive to signals from sensory devices for sensing at least one or more operating conditions of the centrifugal pump so that the operation of the first and second control devices can act to minimize flushing liquid requirements of the wearing ring and minimize dilution by the flushing liquid of the process fluid or mixture being pumped by the centrifugal pump.

Abstract: A centrifugal pump for use in pumping hot liquids under pressure. A rotatable shaft, having an impeller at its lower end, is positioned along the axis of a generally cylindrical pump casing. The pump casing has a suction nozzle at its lower end, and a discharge nozzle near the upper end. A cylindrical outer shell surrounds the shaft within the casing, and a flange on the outer shell is secured to the top of the casing. A cylindrical inner shell is positioned inside the outer shell, surrounding the shaft, and a space is formed between the inner shell and the outer shell. The space provides an effective thermal barrier to protect the shaft. A bearing assembly for the shaft is secured to the inner shell, and a cooler is positioned between the bearing assembly and the impeller, thereby protecting the bearing assembly from the heat of the fluid being circulated by the pump. Seals are inserted within the inner shell above the bearing assembly, and these seals confine the high-pressure liquid within the pump.

Abstract: The weight of the rotor of the machine is carried by a liquid lubricated thrust bearing while being guided by one or more gas lubricated centering elements. The thrust bearing is isolated from the rotor casing so that the lubricating liquid cannot contaminate the pumped gas. The machine is constructed for ratings in excess of 500 kw.

Abstract: Undesired leakage from a system of labyrinth seals used to retain turbine cooling air is reduced by providing passageways which direct all parasitic leakage to a point between the teeth of one of the seals in the system.

Abstract: A turbocharged internal combustion engine system including a liquid-cooled internal combustion engine, a heat exchanger for cooling the liquid, a pump for pumping cooled liquid from the heat exchanger to the engine, and a turbocharger including a rotary turbine and a rotary compressor, a housing containing the turbine and the compressor, a shaft interconnecting the turbine and the compressor and bearings journalling the shaft within the housing between the turbine and compressor. Exhaust gases from the engine are directed through the turbine to drive the same and air from the compressor is directed to the engine. A liquid passage is located in the turbocharger housing and is operatively interposed between the turbine and the bearing. The passage has a lower inlet and an upper outlet and liquid coolant from the engine is directed to the inlet.