Abstract: A pre-swirl nozzle carrier for an aircraft gas turbine with a body (1) is provided with a fitted seat (2) for the location of the pre-swirl nozzle carrier on a main carrier (3) and which features several pre-swirl nozzles (4), characterized in that the body (1) is extended radially inward, that it has several secondary pre-swirl nozzles (6) on its radial inward area (5) and that it is provided with an inner seal area (7) on its inner radial side.

Abstract: A centrifugal blower comprises an impeller; and a casing, having an intake port disposed at a region opposing the air inlet portion of impeller, for accommodating the impeller. The casing is provided with a port cover constituted by rod-shaped members which are arranged in a net structure, in order to cover the intake port of casing. A trailing edge portion of the rod-shaped members is formed with a slanted surface. Due to this slanted surface, the flow of air passing through the port cover so as to flow into the air inlet portion is smoothly deflected away from the axis of rotation of impeller. As a consequence, swirls are restrained from occurring, whereby a sound-insulating effect is exhibited.

Abstract: An integrated bleed regulator system adapted to be fitted to a steam turbine, the system including a fixed part resembling a diaphragm and has a downstream part including distributor blades between an inner ring and an outer ring. A moving part is provided upstream of the fixed part and constitutes a regulator disk having distributor blades between an inner ring and an outer ring. The disk, according to its annular position, totally or partially obstructs a steam passage in the upstream to downstream direction or does not obstruct it at all and the surface of the regulator disk downstream of the inner and outer rings is at an upstream pressure (P1). A passage is also provided so that at least part of an upstream surface of the assembly formed by the inner and outer rings communicates with a space downstream of an upstream part of the distributor blades at a pressure (P2).

Abstract: A intended in particular for equipping a tunnel for refrigeration of products such as food products, wherein this tunnel has a gaseous current flowing through it. The fan includes at least one pair of funnels (1) fixed onto one face of a support (2) mounted so that it can rotate about a vertical axis (XX) and connected to a device for driving rotation. The funnels have their entrance apertures (4) arranged radially so as to allow the gaseous current to penetrate into them and to emerge from them at an accelerated speed via their exit aperture (S). One or several fans [according to the invention] can be arranged at appropriate places in the tunnel, their rotation speed being chosen so that the exit gas currents from the funnels ensure a high degree of heat transport while reducing the risk of undesirable movement of products passing by on a conveyor placed below the fans.

Abstract: A steam turbine has multiple valves for introducing steam into a steam turbine. Each of the input valves introduce steam flow around the entire the 360 degree arc. The set of nozzles are each divided into a plurality of chambers. Each set of chambers extends around the full arc of the turbine. Each set has a valve. The chambers are designed so that all valves are open when the turbine is running at maximum output. The chambers are sized such that valve throttling losses are minimized when the turbine is at its normal operating condition.

Abstract: A nozzle chamber warming-up structure comprises a ring mounted about a rotor of the turbine and defines an annular space surrounding the rotor. The annular spaced is divided by dividing walls into a plurality of steam chambers distributed circumferentially about the rotor, including first ad second upper steam chambers and at least one lower steam chamber. The dividing wall have holes such that steam supplied into the first upper steam chamber flows through the hole in one of the dividing walls into the one or more lower steam chambers, and then flows through The hole in another of the dividing walls into the second upper steam chamber. The steam that flows circumferentially around the ring and warms up the nozzle chamber uniformly.

Abstract: The invention relates to a rotatory pump having a housing (20) and an impeller wheel (40) which is mounted on a driving shaft (30) to rotate integrally therewith, said driving shaft being rotatably supported in said housing, and which has a disk (44) disposed to be concentric with said driving shaft (30), radially extending blades (46) directed along the axial direction of said driving shaft (30) being provided on said disk, and said blades, together with the inner wall portions (22a) of the housing (20) which face the blades (46), forming flow channels for the fluid to be pumped. Furthermore, provision is made for at least one raised portion (48) to be provided on each of the radially extending edges (46a) of preferably three blades (46), said raised portions being enabled to bear against the inner wall portions (22a) of the housing (20) which face the blades (46) of the impeller wheel (40).

Abstract: A centrifugal blower comprises an impeller; and a casing, having an intake port disposed at a region opposing the air inlet portion of impeller, for accommodating the impeller. The casing is provided with a port cover constituted by rod-shaped members which are arranged in a net structure, in order to cover the intake port of casing. A trailing edge portion of the rod-shaped members is formed with a slanted surface. Due to this slanted surface, the flow of air passing through the port cover so as to flow into the air inlet portion is smoothly deflected away from the axis of rotation of impeller. As a consequence, swirls are restrained from occurring, whereby a sound-insulating effect is exhibited.

Abstract: A turbocharger for a gas operated internal combustion engine in which air and gas are fed to the compressor through gas passage openings provided in an air intake connection of the compressor. A simple and compact arrangement for introducing the gas and the air is thereby provided. Optionally, an insert body is arranged at a hub of the impeller, for increasing acceleration of gas flow.

Abstract: A high flow interstage air extraction system for a gas turbine engine includes a 360 degree annular slot formed in a compressor stator casing by a first wall and a second wall. A plurality of baffle plates extend from the second wall to eliminate circumferential airflow. A plurality of stator vane platforms form at least a portion of the first wall. The annular slot results in large amounts of interstage compressor air being extracted from the compressor without adding length to the compressor and the engine.

Abstract: An output stage of an axial-turbine having a high channel divergence has a row of curved vanes and a row of narrowed twisted blades. The curved vanes include, in an axial direction, a positive sweep at their rotor-side end, head and a negative sweep at their stator-side end, with respect to a run of the rotor-side channel boundary. In an area of a stator-side channel boundary a negative sweepback predominates, so that between the curved vanes and the twisted blades an axial diffuser that steadily widens toward the stator-side channel boundary is formed. As a result, an increasing delay of an axial component of a flow agent can occur. The negative sweep at the stator-side end is formed such that at least one of a vane trailing edge and a vane leading edge is directed substantially perpendicularly to the stator-side channel boundary.

Abstract: Platform cooling having a guide-blade platform (30; 60) which is subjected to a hot-gas stream (20) and is separated by a gap (36; 66) from a combustion-chamber segment (40; 70) arranged upstream, one or more segment cooling bores (42; 72) being made in the combustion-chamber segment (40; 70), which segment cooling bores (42; 72) connect a cooling-air chamber (44; 74) to the gap (36; 66). The guide-blade platform (30; 60) has a surface (34; 64) on the downstream side in the region of the gap (36; 66), the axes of the one or more segment cooling bores (42; 72) running roughly tangentially to said surface (34; 64).

Abstract: A pump casing comprises an inlet conduit, a volute and a flow directing chamber. The inlet conduit has a first interior cross-sectional area. The volute has a hollow interior adapted to house a pump impeller. The flow directing chamber is positioned intermediate the inlet conduit and the volute. The chamber has a second interior cross-sectional area greater than the first interior cross-sectional area. The chamber has an inlet opening at a lower portion of the chamber and an outlet opening at an upper portion of the chamber. The inlet opening is in fluid communication with the inlet conduit. The outlet opening is in fluid communication with the volute. The outlet opening has a third interior cross-sectional area less than the second interior cross-sectional area.

Abstract: In a centrifugal blower in which the outer periphery of an intake opening is arranged outside of the inner edge of a main blade, a large number of sub blades are provided in the intake opening at a location corresponding to the main blade. The sub blades lead the secondary air flowing from an outside area of the intake opening to a rotating direction of a centrifugal multi blade fan. Thus, the secondary air flows from the sub blade to the main blade smoothly, thereby increasing a secondary air flow amount and reducing air flow noise.

Abstract: A fan unit for a building's air handling system comprising a support structure including a front wall with an air inlet opening formed therein and a bladed fan wheel rotatably mounted on the support structure about its central axis and having an axial air intake on a front side thereof confronting the inlet opening. The fan wheel has an annular air outlet extending about its circumference. A fixed centerbody directs air flow into and within the fan wheel and extends along the central axis from a relatively narrow front end located in the air inlet opening to a wider rear end located within the fan wheel. This centerbody has an annular exterior surface which curves outwardly in a section thereof adjacent the wider rear end. The centerbody extends through the axial air intake of the fan wheel. Support struts rigidly support the centerbody in a fixed position. Preferably the centerbody is filled with sound attenuating material.

Abstract: A radial-inflow large volume-rate low pressure-differential, single-stage compressor comprising 2 periphiral concentric sets of axial blades spaced circumferentially between two supporting rings and further strengthened against bending by intermediate rings if necessary. The outer set of blades rotates to impart energy to the working fluid and the inner set is stationary to recover kinetic energy. Stationary guide surfaces concentric with the blades direct the radially inward flow to axial. A diverging duct recovers further the kinetic energy. The compressor fills the pressure-ratio gap between blowers and turbo-compressors. Its use in desalination instead of the currently used centrifugal compressors, can scale-up the vapor-compression unit-size to more than three fold.

Abstract: The present invention relates to a fan having a plurality of equiangularly spaced, radially extending blades. The spacing provided between adjacent blades is substantially constant along the entire radial length of the blade for increasing a blowing efficiency, while also allowing a mold separation operation along the axial direction during the formation of the fan using a mold. In a case where the blade is a sweep-forward blade, the number of the blades is seven or more and has a sweep-forward angle of the blades between 35 to 45 degrees. Finally, in case where an electric motor for rotating the fan is supported by stays, the number of stay member and the number of blades, which are not evenly dividable by each other, should satisfy a relationship of 2,000<x.times.y.times.Nf/60, where N.sub.f is a rotational speed of the fan.

Abstract: In a radial-axial inlet housing of rotating thermal machines, a flow divider is disposed in the turbine or compressor inlet, in front of the inlet and opposite the first turbine guide vane row or the compressor ribs. The flow divider in this case is disposed in the central lower stagnation point of the housing flow. It has a thick-headed profile with a straight median line. The rear side of the flow divider, seen in the direction of flow, is disposed perpendicularly to the rotary shaft at a distance from the first guide vane row or the ribs. There is a gap between the radially inner side of the flow divider and the housing wall, and the chord length of the flow divider decreases radially outwardly. The leading edge of the flow divider, seen in the direction of flow, is inclined like a straightened potential line relative to the housing wall.

Abstract: To control unsteady motion phenomena in turbomachines, it has been proposed to employ an active control system to modify the flow conditions. In the present invention, the modification is effected by devices mounted in a bullet or nose bullet at the entry to a rotor of the turbomachine.

Abstract: Noise is reduced on an aircraft engine of the type having aft mounted propeller blades 10 which pass through exhaust gas streams 20 expelled from circumferentially spaced nozzles 14. The nozzles 14 are rotated, or the exhaust flow deflected, such that the high velocity exhaust streams 20a expelled from the nozzles 14 are directed away from their normal axial direction to impact the blades 10 at the same relative angle of attack 36a as the relative angle of attack 34 of the low velocity ambient air stream 22 thereby reducing fluctuations in blade lift and the associated noise.

Abstract: A boat or ship's propeller system utilizes a rotary propeller comprised of a plurality of short blade elements arranged annularly and supported from a central propeller shaft by spokes, there being an annular "funnel" with the large end forward which scoops water and delivers it under some pressure to the rotating annular ring of blade elements.

Abstract: A stator assembly for a gas turbine engine having a support structure and a stiffening ring 46 extending about the support structure 34 is disclosed. Various construction details which increase the rigidity of the support structure and enable the stiffening ring to accept axial and radial loads are developed. In one embodiment the stiffening ring 46 is the seal ring 52 for a seal end 74. In one particular embodiment, the thermal expansion characteristic of the support structure is greater than the thermal expansion characteristic of the stiffening ring to insure that the stiffening ring is in tension under normal operative conditions of the engine.

Abstract: A fluid flow machine, particularly a centrifugal pump, wherein the casing has a tubular first portion serving to convey a stream of fluid radially toward a pump shaft which drives one or more impellers. The casing has a second portion with an arcuate band-like wall which spacedly surrounds the shaft and defines a passage having an oval cross-sectional outline and receiving fluid from the outlet of the first portion. A cylindrical outlet of the passage is adjacent the foremost impeller or the only impeller of the pump. One or more guides are provided in the passage to control the flow of fluid from the outlet of the first portion of the casing toward and into the range of the foremost impeller.

Abstract: An axial torque governor for a turbo-supercharger for internal combustion engines has a flow channel which is composed of a cylindrical section and of a spherical section following thereupon, the spherical section merging into a second cylindrical section by way of a nozzle section. The radius of the spherical section is equal to the radius of the first cylindrical section. A plurality of guide vanes are each composed of essentially circular segments which cover the cross-section of the first cylindrical section given complete closure of the inlet passage, whereby the pivoting axes of the guide vanes respectively lie in the entry edge of the vanes.

Abstract: An improved partial arc admission system for a high pressure steam turbine, the system having a plurality of nozzle blade groups the blade aspect ratio of blades in each group vary according to the maximum pressure drop across each nozzle blade group.

Abstract: A down-hole signal transmitter includes an annular impeller mounted on a cylindrical casing and arranged to be driven by the mud flow passing along a drill string, and an annular stator fixed to the casing upstream of the impeller. The stator has blades canted in one sense relative to the mud flow direction, whereas the impeller has blades parallel to the mud flow direction. The stator blades thereby cause the mud flow to impact on the impeller blades at such an angle that a small or negligible thrust results at the impeller bearings. It is therefore possible to insure a long service life for the bearings.

Abstract: An axial blower with an intake that tapers conically into a cylindrical component. An impeller rotates inside the cylindrical component. A stationary channeling ring of approximately the same diameter as the cylindrical component is positioned upstream of the impeller and surrounded by an annular channel. The channeling ring is approximately equidistant from each end of the annular channel. Diversion blades are positioned inside the annular channel and adjusted in relation to its axis. To make the blower easier and less expensive to manufacture and to increase its breakaway limit, the diversion blades consist of flat sheets of metal and both their upstream and their downstream edges slope.

Abstract: A compressed air rotary motor includes high and low pressure rotors having peripheral helicoidal threads. The rotors are sandwiched between a circular plate and end wall while an intermediate wall separates the two rotors. Fluid passageways in the plate and two walls control the flow of compressed air initially to a single gap between two threads of the high pressure rotor and thence to at least two gaps between a plurality of adjacent threads of the low pressure rotor following which air is delivered to an annular channel in the end wall prior to exiting the motor.

Abstract: A diaphragm for an axial flow turbine includes a plurality of spaced apart nozzle partitions and an inner member for fixedly securing the nozzle partitions. The inner member is contoured to direct elastic fluid flow radially inward. The nozzle partitions are spaced such that a minimum throat extends a predetermined radial distance from the root, thereby forming a converging-diverging flow passageway between nozzle partitions. The trailing edge of the nozzle partitions are disposed to include axial and tangential lean with respect to the rotor of the turbine.

Abstract: There is provided a propulsion installation of an air-cushion transport vcle wherein an axial fan having working blades is installed in an annular duct; a ring slat is positioned before said annular duct so that said annular duct and said ring slat form therebetween an annular passage the exit of which is disposed ahead of said working blades installed in said annular passage is a vane cascade made up of curved plates, with a concave portion of each being directed toward a pressure side of said working blades.

Abstract: This invention relates to a fan suction chamber having front, back, and bottom walls. The front wall defines a suction inlet; and the back wall has an upper section, which is parallel to the front wall, and a lower section, which slants downward and forward toward the front wall of the suction chamber at an angle of 67.degree. to 78.degree. with the horizontal. The bottom wall of the suction chamber connects the front wall and the lower section of the back wall. The depth of the chamber at the upper section of the back wall is 0.35 to 0.38 times the width of the suction chamber, and the depth of the chamber at a lower end of the lower section of the back wall is 0.14 to 0.18 times the width of the suction chamber. The diameter of the suction inlet is 0.42 to 0.50 times the width of the suction chamber.

Abstract: A well point pumping system including a series of well points installed in an area of the ground which is to be dewatered or dried out. This system and its apparatus include an enclosed tank which can be located closely adjacent the well points which are often in a dirty, wet and/or remote area which often has difficult access. Also, the dewatering areas may be located at different levels below the ground surface. Usually the apparatus is subjected to severe abuse from handling, being moved about or from other machinery in the area. Furthermore, it may be difficult to install or remove the apparatus. The present system and apparatus include an enclosed tank which is capable of withstanding abuse and which can be located in the dirty working area and remotely from its power source. The tank encloses an impeller type water pump assembly, and also encloses a vacuum pump and its drive motor which create the required vacuum in the tank to cause water to be inducted into the tank from the well points.

Abstract: Blades in the steam path of a steam turbine diaphragm are assembled into slots in full circular bands and are structurally bonded thereto by welding. After stress relief, the bands are each separated into two 180 degree pieces by line cuts which pass between adjacent blades. The bands are then welded to semicircular rings having planar mating surfaces. The welding of the rings to the bands is performed with minimum welding without concern for whether the welds enter the interface sufficiently far to contact the blades themselves.

Abstract: The turbine has an ambient pressure runner rotatable about a vertical axis. An annular row of radially curved vanes extends between the runner periphery and a center discharge. A surrounding volute directs an accelerated flow of water to the runner periphery with flow conditions such that supercritical flow enters the runner and is maintained across each vane rear face. These operational conditions are dependent upon volute design, available water head values, water entry angle, number of vanes and runner vane design.

Abstract: A supercharger has a high pressure engine exhaust gas passage, a control gas duct communicating with the high pressure passage and a valve for opening and closing communication between the high pressure passage and the control gas duct. A turbine rotor is mounted at one end of driveshaft; a compressor rotor is mounted at the opposite axial end. Air at ambient conditions is admitted to the compressor rotor which is driven through the driveshaft from the turbine. The air is compressed and pumped into the intake manifold of a spark ignition engine. The valve operates to increase the flow rate of control gas at low engine speeds and to decrease the flow rate of control gas at high engine speeds. The control gas enters the mainstream of exhaust gas that flows in the turbine inlet duct thus restricting the area of the inlet duct when engine speed is low and increasing the exhaust gas flow rate when engine speed is high.

Abstract: A submersible pump assembly having a volute casing in which a pump impeller is rotatably driven from a power source located outside the pump casing. The scroll-type casing has an axially directed inlet and tangential outlet. A drive shaft connects the power source with the radial flow impeller and a support bearing for the drive shaft is located at one side and centrally of the casing. The water inlet for the pump casing is located co-axially with the axis of the impeller at one side of the pump casing. The water flowing in an axial direction into the pump casing forms a vortex around the shaft bearing to create a minimum pressure zone around the bearing.

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: In an improved food freezing tunnel, an improved freezing air flow apparatus, more uniformly distributes upwardly flowing freezing air through a horizontally traveling porous food conveyor, thereby more effectively freezing the conveyed food pieces. The improved freezing air flow apparatus utilizes a centrifugal fan wheel, without a surrounding volute or housing, mounted with its rotational axis arranged vertically. It is dependingly mounted from a fan motor, in turn centrally supported, on horizontal frame, within the fan chamber located over an open bottom lower air souce chamber of the freezing tunnel. Returning air, after passing from the fan chamber up through the freezing coil chamber, and beyond up through the porous conveyor belts of the freezing chamber, is drawn down within the overall freezing tunnel building alongside each side of the freezing tunnel, to be again drawn upwardly through the open bottom air source chamber and then back up into the fan wheel and fan chamber for recirculation.