Abstract: In a rotodynamic pump intended for operation at high pressures e.g. 2000 p.s.i. and for pumping contaminated fluids e.g. corrosive water, high pressure sealing assemblies are provided at the through-openings in the pump casing for the pump shaft. Each assembly includes a pair of axially spaced mechanical seals, and each seal comprises a rotor portion fixed to the pump shaft and a stator portion axially movable into sealing engagement with the rotor portion, the stators being located intermediate the rotor portions. A busing is located between the seals and includes conduits supplying oil at a pressure above pump pressure to the innermost seal whence the oil is reduced in pressure and passed to the outermost seal, so that oil is delivered to the facing ends of the stators. The oil serves for lubrication of the sealing interfaces and for the prevention of egress of contaminated material through said innermost seal.

Abstract: A turbo-machine casing comprises a part double skinned portion at a location surrounding at least one stage of rotor blades; the spaces defined between the two skins containing a heat insulating medium, and the inner of the two skins being additionally provided upon its radially innermost surface with a lining of heat insulating material, the casing being connected to a mass disposed radially outwardly of the casing whereby the rate of thermal expansion of the casing can be reduced nearly equal to the bladed rotor which it surrounds.

Abstract: A supercharger comprising a center housing, a turbine casing mounted on said center housing, a turbine shaft rotatably supported within said center housing, said turbine shaft having a turbine impeller at one end thereof within said turbine casing, a seal provided on said turbine shaft to prevent lubricant leakage from said center housing to said turbine casing, a heat shroud mounted on said turbine shaft between said center housing and said turbine casing, and a pressure hole formed in said heat shroud which permits communication of the inner and outer parts thereof thereby applying a high pressure in the inside part of said heat shroud to enhance sealing effect of said seal.

Abstract: An impeller type pump has a pump body consisting of a front casing and a back casing. Each of the casings comprises a ceramic main portion and a protection member covering the main portion. The protection members of both the main portions are interconnected with each other at their confronting marginal portions through a continuous packing. Those confronting marginal portions of both the main portions which are adjacent to a pump chamber defined by inner surfaces of both the main portions are provided each with an annular rib such that the annular ribs of both the main portions define a narrowed clearance restricting the flow of waste water therebetween, resulting in reduction of wear of the packing.

Abstract: A preassembled unit or inner cartridge for a multi-stage barrel type centrifugal pump including bearings, seals, balancing device, impellers and diffusers is aligned, balanced and pressed together into assembled position by a resilient means for stressing the parts against a pair of spaced handling clamps at opposite ends of the preassembled unit which permits the shaft to act as an elongated tie bolt to hold the preassembled unit or cartridge so that it can be installed or removed easily from the fixed outer casing of the multi-stage barrel type centrifugal pump.The unit or cartridge is preassembled and aligned in a special supporting frame which duplicates the engagement shoulder and end face on the pump casing so that all adjustments can be made easily and precisely at a point away from the pump.

Abstract: This invention relates to a vane assembly for a split-shaft gas turbine engine. The invention relates to a vane assembly which is placed in the hot gas stream to control diffusion and to deflect the hot gas just prior to passage through the blades of the power wheel. The vane assembly is characterized by having each controlling and deflecting blade constructed in two cooperating parts, a forward portion of the vane which is hollow and stationary to control diffusion and a trailing portion which is allowed to pivot through a small angle to control deflection. The vane assembly is constructed in sections to have two complete vanes per section and the sections are fitted into circumferential slots in the casing of the turbine. The vane tip actuators are passed through the turbine casing and are fitted to the trailing portions of each vane so that the trailing portions of the entire assembly move as a unit by a single control mechanism.

Abstract: Multi-Stage ring type centrifugal pumps for pumping fluids are adapted to receive an inducer shaped and sized generally but not necessarily to replace the impeller and diffuser of the first pumping stage of the given centrifugal pump. The preferred type of inducer for this use has an enlarged inlet diameter, at least two inducer vanes; an outlet diameter less than the inlet diameter to provide generally convergent flow passages, and the selected inlet vane angle for the inducer vanes will provide a positive incidence angle to increase the pressure at the suction inlet of the associated stage impeller into which the fluid being pumped is delivered.The inductor is shown in various forms. One embodiment includes an integral hub, inducer vanes and outer shroud. A second male type embodiment includes an integral hub and inducer vanes, and an operatively associated fixed outer shroud matched to the outer periphery of the inducer vanes.

Abstract: A plurality of threaded studs are rigidly connected to the turbine head cover about each wicket gate shaft. A packing ring is adjustably connected to the threaded studs to hold the wicket gate shaft packing between the head cover and the wicket gate shaft. A thrust ring is also adjustably attached to the threaded studs to provide thrust clearance adjustment between the thrust ring and the wicket gate.

Abstract: A turbo-machine such as a hydraulic turbine and/or pump-turbine is provided with a combined scroll case distributor wherein the customary stay ring of the scroll case is dispensed with and the distributor integrated with the scroll case, the edges of the distributor that define the distributor slot being held in spaced relation by a series of bolts, on which may be mounted the wicket gates of the machine. The arrangement results in a marked reduction in size and weight of the scroll case components, with potential benefit in the characteristic form of the machine performance.

Abstract: A tank for oil or other hydraulic fluid is kept under a few pounds of air pressure during operation to keep air from being drawn into the fluid and to aid its flow to the pump. The pressure is provided dependably and quickly by a small air pump driven whenever the hydraulic pump is driven. A bleed-off discharge causes prompt dissipation of the pressure on shutdown so as not to cause oil leakage while the associated hydraulic pump is idle. The hydraulic level is below the pump shaft level so there will be no leakage by gravity.

Abstract: A centrifugal pump having an impeller with a fingerlike projection on each blade extending radially outward from the impeller body into the outer annulus of the pumping chamber. These projections cut through the liquid that has been centrifuged to the outer annulus causing a turbulence which draws a portion of the liquid into the body of the impeller for mixing with trapped air. This mixing action causes the air to be centrifuged with the liquid and alleviates air locking in the pump and is especially valuable in a laundry washing machine where, in the last portion of the liquid extraction cycle, air and soap bubbles are likely to be included in the liquid.

Abstract: A high temperature turbine shroud assembly for an aircraft gas turbine engine comprising a plurality of arcuate ceramic blocks arranged in a ring. The blocks are supported by a pair of annular support members which retain the blocks in the assembly. Spring-like fingers associated with the support members apply a preloaded force against a pair of slanted dovetail surfaces on the blocks to force the blocks against rigid stops formed upon the annular support members, thereby establishing their proper radial position within the assembly. The preload applied by the fingers accommodates the thermal expansion differences between the ceramic blocks and the metallic support members. In an alternative embodiment, the blocks are retained between cooperating rigid legs extending from the annular support members and wedged radially inwardly into position by a preloaded spring contacting the back side of the blocks.

Abstract: A stator of a multistage centrifugal compressor, comprising a casing, stages accommodated therein and made up each of a diaphragm, a vaned diffuser and a return guide vane assembly placed one after another in the direction of flow of the medium being compressed and forming a fluid passage. The stage return guide vane assembly is rigidly fixed on the diaphragm of the next stage. The vaned diffuser of each stage is rigidly connected to the diaphragm and the stage return guide vane assembly, their joint being arranged on a diameter less than the maximum diameter of a fluid passage.

Abstract: The compressor, as evidenced in the several embodiments presented herein, comprises, in its essentials, a self-contained gear housing which, centrally thereof, receives a power input shaft for driving a bull gear. The bull gear drives either one or a plurality of other gears which, in turn, are coupled to one or a complementary plurality of gas compressing impellers. Integral with the outer wall of one side of the gear housing is defined one or a same plurality of gas handling structures within which the impeller(s) are confined. The gas handling structures comprise inlet pipes, compression chambers, diffusers and open-ended plenum chambers. According to the requirements of the user, domed enclosures are replaceably bolted to the gas handling structure either directly, or through intervening inter- or after-cooler heat exchangers, and with inter-stage ducting, to define of the gas compressor either a single compressing stage, a plurality of independent stages, or successive, series-coupled compressing stages.

Abstract: A plurality of skewed slots of a particular shape are provided within a compressor casing adjacent at least one stage of compressor blade tips, the slots having an axial length greater than that of the adjacent blade tips. The slots are provided such that upon occurrence of compressor surge or stall, the stagnating air occurring about the blade row may be directed by the slots downstream of the compressor blade row back into the main stream of fluid passing through the compressor. By such an arrangement, the slots provide a compressor in which the air flow and pressure ratio may be increased before reaching compressor stall or surge.

Abstract: A centrifugal compressor has at least one stage with its own impeller shaft, an inlet and an outlet for gas, and an epicyclic gear train for driving the impeller shaft. The epicyclic gear train comprises three members, a sun gear, a ring gear and a carrier on which a series of planet gears are mounted in mesh with the sun and ring gears. Means is provided for connecting a power input to one of the members of the epicyclic gear train, and means is provided connecting a second of the members to the impeller shaft. Means are provided for controlling the rotational speed of the third of the members to vary the speed of the impeller shaft of the compressor, and actuating means are provided for actuating the control means in response to the pressure of the compressed gas at the outlet.

Abstract: An arrangement is set forth for mounting knife edge seals on a rotating bladed disk for sealing cooperation with sealing lands on a ring, fixed against rotation, connected to the inner ends of adjacent vanes. The knife edge seals are fixed to a sealing member which is removably positioned on a cylindrical-like flange on the disk. Radially mounted headed pins, held in position by centrifugal force during engine operation, fix the sealing member to the disk flange, while a pin retaining ring holds the pins in place when the disk is at rest.

Abstract: A pump for handling liquids laden with abrasive particles in which the seal of the shaft between the low- and high-pressure stages comprises at least two floating rings provided on the shaft in a circular gap between the shaft and the casing. The casing has a circular collar at the side of the low-pressure stage, partly covering the circular gap which is adjoined by the rings during pump operation.

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 cooled vane for a gas turbine engine in which the coolant channels have an arcuate component, convex outwardly towards the surface of the vane to establish centrifugal force in the coolant flowing therethrough and thereby induce a secondary flow to the coolant, promote mixing and reduce the outer boundary layer of the coolant to enhance the heat transfer characteristics to the coolant and thereby more efficiently maintain the vane within acceptable temperature limitations.