Abstract: A torque shaft assembly includes a hollow tube with a central axis disposed between and fixedly connected to first and second crankshafts at first and second distal ends, respectively, of the tube for movement of an array of connecting members such as push rods. A hollow interior of tube between the first and second crankshafts is filled with a sufficient quantity of flowable inertia material or damping media to absorb vibratory energy by friction during operation of the engine. The hollow interior is preferably filled with a quantity of damping media to a level by volume of about 98% and a preferred flowable inertia material is round steel shot. A plurality of spaced-apart clevises are fixedly attached to a tube wall on an outer surface of the tube wall surrounding the hollow interior. Each clevis includes connection means disposed away from the wall outer surface for connection with an actuator for movement of the array of adjustable devices such as variable stator vanes.

Abstract: An exhaust-gas turbocharger for an internal combustion engine has a turbine having a variable turbine geometry for the variable setting of the effective flow inlet cross section to the turbine wheel. The exhaust-gas turbocharger has a compressor which is connected to the turbine via a shaft. The variable turbine geometry can be adjusted by means of a regulating device between a closed position and an open position. To compensate for wear, a stop limiting an end position of the variable turbine geometry is provided, and the position of this stop can be set in a variable manner.

Abstract: A vaned diffuser for a centrifugal compressor has provision for selectively adjusting the pitch of the vanes in order to accommodate variable load conditions. Each of the vanes is rotatable about a pivot pin near its leading edge and is engaged with an actuation member near its trailing edge. The actuation members are attached to a common ring which can be selectively rotated to move to the vanes in unison. The ring is supported by rollers at its outer periphery and is positioned at the outer periphery of a diffuser wall such that there is no forward facing step projecting into the flow stream.

Abstract: Exhaust gas that is supplied to a turbine, but without going through channels between nozzle vanes provided in a variable-capacity turbocharger, is eliminated. A nozzle unit 100 in turbocharger 10 has a mounting plate 102 and a side plate 106 installed in a recess 20a provided in a housing 20 such that the side plate can move in the recess. A pushing mechanism 116 or 150 pushes the side plate toward the mounting plate 102. A movement limit 108 limits the movement of the side plate parallel to the turbine shaft toward the mounting plate 102.

Abstract: An annular radially disposed split ring diffuser for a centrifugal compressor includes an inner ring and an outer ring. A drive positioning mechanism includes a pinion gear on a pinion axle driven by an actuator. A rack gear is mounted to the inner ring and adapted to engage in meshing arrangement with the pinion gear. The actuator is operable to position the inner ring between a fully open position and a partially closed position with respect to the outer ring. A travel limiter is provided to positively limit the travel of the inner ring at the fully open and the partially closed positions. A compliant mechanical stop on a side of the rack gear touches an outer ring stop on the outer ring when the inner ring is in the fully open position to prevent the gear teeth from being stripped by the actuator torque output.

Abstract: A turbocharger with variable geometry turbine inlet nozzle employs a rotating unison ring for actuation of multiple vanes. A crank arm engages a slot in the unison ring to convert linear actuator motion into rotation of the unison ring. A crank pin having a rectangular tongue adapted to be received in the slot and a circular body received in an aperture in the crank arm reduces contact stresses between the crank tongue and unison ring slot. The crank pin is retained in the crank arm by the unison ring and center housing flange of the turbocharger.

Abstract: By disposing a support pin (24) at a position in front of a front edge (19a) of a movable nozzle blade (19) in a state in which the movable nozzle blade (19) is located at a rating opening position B set between a maximum opening position A and a minimum opening position C, aerodynamic affect of the support pin when flow rate is small is reduced, and a turbine efficiency when the flow rate is small is enhanced.

Abstract: A diffuser for a centrifugal compressor includes an inner ring and an outer ring. An actuator drives a pinion gear which interfaces with a rack gear which is mounted to the inner ring. The actuator is operable to position the inner ring between a fully open position and a partially closed position with respect to the outer ring. In the fully open position, the rack gear is offset from an outer ring stop a distance equivalent to five degrees of actuator movement. The control logic of the actuator is modified so that the open position of the actuator moves the pinion gear so that the rack gear stops at or near the offset distance, leaving five degrees as the margin for error. Any overtravel by the actuator does not cause the rack gear to impact the outer ring stop, thus avoiding possible stall of the actuator.

Abstract: A vane actuator for use in a turbine engine, comprising a carrier member carrying a plurality of vanes which is angularly movable, in use, so as to vary the position of the vanes relative to an airflow through the engine. The actuator includes an electrical drive arrangement comprising an input shaft which is arranged to drive an output shaft coupled to the carrier member. The electrical drive arrangement includes a brake arrangement arranged to apply a braking load to the input shaft in the event that an interruption occurs in the electrical drive arrangement.

Abstract: A vaned diffuser for a centrifugal compressor has provision for selectively adjusting the pitch of the vanes in order to accommodate variable load conditions. Each of the vanes is rotatable about a pivot pin near its leading edge and is engaged with an actuation member near its trailing edge. The actuation members are attached to a common ring which can be selectively rotated to move to the vanes in unison. The ring is supported by rollers at its outer periphery and is positioned at the outer periphery of a diffuser wall such that there is no forward facing step projecting into the flow stream.

Abstract: The object of this invention is to provide a nozzle adjustment mechanism for a variable-capacity turbine, which would have a connection between the connecting lever to connect the nozzle drive component driven by the actuator to nozzle vane, and the edge of the nozzle shaft on the nozzle vane. The connection would have a high degree of strength and would not experience deformation. There would be no need for special assembly tools such as a jig, and a highly accurate connection would be achieved with fewer assembly processes and at a lower cost. The connecting hole of the connecting lever has a stopper surface which is flat or curved. The connecting edge of the nozzle shaft also has a stopper surface which is corresponding to the stopper surface of the connecting hole.

Abstract: A fabricated torque shaft is provided that features a bolt-together design to allow vane schedule revisions with minimal hardware cost. The bolt-together design further facilitates on-site vane schedule revisions with parts that are comparatively small. The fabricated torque shaft also accommodates stage schedules that are different one from another in non-linear inter-relationships as well as non-linear schedules for a particular stage of vanes.

Abstract: An intake and exhaust damper assembly has a motor and fan assembly pivotally mounted for movement toward and away from a louvered rotatable blade damper.

Abstract: An exhaust-gas turbocharger turbine of an internal combustion engine is provided with a spiral guide passage arranged in a turbine housing, a turbine impeller, a flow gap be ween the guide passage and the turbine impeller, and guide blades forming a guide cascade. The guide cascade with the guide blades projects axially from a support, arranged so as to be displaceable in the axial direction in the turbine housing, in such a way that the guide blades, in normal operation, are mounted in recesses of a housing wall part of the turbine housing, the recesses, in the form of a female piece, forming a mating profile shape for the guide blades. In braking operation of the internal combustion engine, the guide blades project into the flow gap during an axial displacement of the support. The device with actuation for the braking operation can be fitted as a complete module into the turbine spiral.

Abstract: A centrifugal pump includes a casing having an outlet chamber and an impeller rotatable in the casing. A set of controlling sideplates are installed in the outlet chamber. The controlling sideplates are movable along the axis of the impeller, positioned such as to change the outlet width and the chamber volume thus allowing one to obtain the desired pumping parameters. A driving mechanism is connected to the sideplates, for their axial movement. The design contains driving mechanisms of the hydraulic type and electrical type. A pair of pilot shafts are connected to the sideplates and extend into a sensor for controlling the movement of the sideplates. A control system is also provided whose main purpose is adjusting the axial displacement of the sideplates, which automatically controls the variable pumping parameters.

Abstract: A shaft seal for use with a unison ring actuator crank is disposed within a center or bearing housing of a variable nozzle turbocharger to reduce leakage of hot exhaust gas from an adjacent turbine housing. A seal ring is disposed within the turbine housing backing plate which has two differently sized diameter sections. The seal ring is positioned within a relatively larger diameter opening section and has an inside diameter sized to permit independent rotation around the shaft and an outside diameter sized to cover a relatively smaller diameter opening section. A relieved back surface directed towards the center housing such as a conical back surface that is tapered axially inwardly moving radially from the outside diameter to the inside diameter of the seal ring provides the desired sealing while not adding to the operating friction of the crank.

Abstract: A nozzle drive mechanism is provided for a link plate 112, which can operate all nozzle vanes smoothly and synchronously. The nozzle vanes 104 supported in such a way that the nozzle vanes are free to rotate between open and closed positions on nozzle shafts. The nozzle vanes are connected to levers which correspond to the nozzle shafts so as to rotate along with the levers. Each boss at the end of each lever 114 functions as a shaft which is parallel to the nozzle shaft. The shafts (bosses) in the nozzle vanes engage in oblong holes in the link plate in such a way that they are free to swing, and are thereby connected to the link plate. A declined straight or curved centerline which runs through the oblong hole to the oblong direction, extends at a given angle with respect to the radius of the link plate.

Abstract: A turbine includes a casing having a fluid inlet, a fluid outlet interconnected by a fluid flow path. A valve body is mounted in the casing including a plurality of flow passages within the flow path. Each passage extends from a passage inlet to a passage outlet. A control ring is movably mounted on the valve body adjacent the passage inlets. The control ring includes a plurality of openings formed therein. The openings are variably sized and variably spaced apart so that when the control ring is moved relative to the valve body, the passage inlets are closed and opened in sequence.

Abstract: An adiabatic expansion apparatus 22 with a built-in turbine impeller 12 adiabatically expands gas at a cryogenic temperature when the impeller rotates. A control device 24 is connected coaxially with the turbine impeller to control the impeller. A variable nozzle mechanism 30 is provided for varying the throat area for the gas at a cryogenic temperature to be introduced into the turbine impeller. The adiabatic expansion apparatus is installed in a vacuum vessel 14, and a control device is disposed outside the vacuum vessel. The variable nozzle mechanism comprises a nozzle component 32 built into the adiabatic expansion apparatus, and a driving component 34 installed outside the vacuum vessel. The nozzle component and the driving component are connected to the turbine impeller with a coaxial, thin cylindrical component 36, and drive the nozzle component when the cylindrical component rotates about the axis Z of the turbine impeller.

Abstract: Steam turbines with or without a control stage are constructed with the same number of control valves. There are preferably two control valves in each case. The valve subassembly, the turbine outer casing and parts of the turbine inner casing are of identical design and can be used for steam turbines with or without a control stage. In the case of the steam turbine illustrated with a control stage, the inner casing is provided with integrated nozzle boxes, which are separated from each other by intermediate walls. In the case of a steam turbine without a control stage, the nozzle boxes, and accordingly, also the intermediate walls are missing.

Abstract: An intake and exhaust damper assembly has a motor and fan assembly pivotally mounted for movement toward and away from a louvered rotatable blade damper.

Abstract: A low drag ducted ram air turbine generator and cooling system is provided. The ducted ram air turbine generator and cooling system has reduced drag while extracting dynamic energy from the air stream during the complete range of intended flight operating regimes. A centerbody/valve tube having an aerodynamically shaped nose is slidably received in a fairing and primary structure to provide a variable inlet area. An internal nozzle control mechanism attached to the valve tube positions nozzle control doors to provide variable area nozzles directing air flow to the turbine stator and rotor blades to maintain optimum generator efficiency. An alternate embodiment includes an annular internal nozzle having interleaved panels to modulate the air flow to the turbine.

Abstract: In an engine braking arrangement for an internal combustion engine with an exhaust gas turbocharger including a turbine arranged in the engine exhaust duct and a compressor driven by the turbine and arranged in the engine intake duct, a brake valve disposed in the exhaust duct upstream of the turbine and a pressure relief line extending from the exhaust duct upstream of the turbine rotor to an area downstream of the turbine and including a stop valve, the stop valve is a rotationally adjustable rotary valve operable by an actuating device depending on the intake pressure in the intake duct.

Abstract: A method for forming a pulsating air pattern at a surface of an electronic carrier assembly. The electronic carrier assembly includes a circuit card having an attached module or chip. An air circulation pattern, or flow pattern, is formed at the surface of an electronic carrier assembly by natural convection, or by a steady air flow generated by a fan, respectively. A suitably-positioned rotatable disk having one or more void regions, and in a state of rotation, interrupts the air circulation or flow pattern by causing a pulsation air pattern at the surface of the electronic carrier assembly. The effect of the pulsating air pattern is to increase the rate of heat transfer from the electronic carrier assembly by two mechanisms. First, the thickness of the boundary layer at the surface of the electronic carrier is reduced, thereby increasing the heat transfer coefficient at the boundary layer. Second, stagnant air trapped between nearby electronic components on the electronic carrier assembly is swept away.

Abstract: An intake and exhaust fan assembly is provided having a motor and fan assembly mounted for movement on rails toward and away from a rotatable blade damper mounted on an angle to the motor/fan assembly.

Abstract: A variable camber vane for the inlet of a gas turbine engine has a pivoting trailing section behind a fixed leading section. In order to accommodate a wide range of flow conditions the trailing section is movable through a wide angle about its upstream edge. The surrounding casing profile and the radially outer edges of the vane trailing sections are matching part-spherical surfaces. As a result of the large angle of movement the trailing section is subjected to substantial turning forces. To contain the forces the curved radially outer edges of each trailing section is formed with a broad flange which tapers in the direction of the vane trailing edge, and for aerodynamic efficiency the flange is smoothly blended into the vane aerodynamic surfaces.

Abstract: An arrangement to regulate the flow of steam extracted intermediately from a steam turbine and to induce a steam flow, between separate turbine parts, in a direction that is essentially axial with respect to the rotational direction of the turbine rotor. The steam turbine consists of two turbine parts separated by a partition wall and has an intermediate steam extraction outlet located between the first turbine part and the partition wall. Steam may pass between the two turbine parts through a passage, within the partition wall, having an externally controlled valve used to regulate the steam flow. The valve is configured to reduce the external force needed to control its position. Together, the valve and passage are configured to minimize the pressure loss and turbulence of the steam flow as it passes between the two turbine parts so that the steam flow pressure on the second turbine part is maximized.

Abstract: A centrifugal or mixed flow type turbomachine, of a diffuser type can operate stably at low flow rates below the design flow rate, by preventing the initiation of flow instability in the system. The turbomachine comprises a stabilization member disposed in a predetermined location of the diffuser section which prevents a generation of unstable flow in the diffuser section during a low flow rate operation.

Abstract: A bushing assembly as a means to enable guided movement of a shaft in an opening of a housing comprises a stationary bushing support carried by a housing internal wall. The bushing support has a support internal wall defining a bushing support opening through the bushing support to receive a movable shaft. Carried by the shaft is a removable wear sleeve having a wear sleeve outer wall in juxtaposition with and spaced apart from the support internal wall to permit relative axial movement of the wear sleeve with the shaft within the bushing support opening. Disposed between and for contact with the support internal wall and with the wear sleeve outer wall is an anti-friction layer.

Abstract: A system for a variable capacity centrifugal compressor is provided. The compressor includes a base plate, a housing, and a variable geometry diffuser. A selectively moveable wall is disposed adjacent the base plate to vary the geometry of the diffuser. A portion of the moveable wall cooperates with a portion of the base plate to restrict the flow of fluid between the moveable wall and the base plate throughout the range of motion of the moveable wall to reduce the force required to open the diffuser.

Abstract: A method and apparatus for controlling the amount of gas flow through a compressor having variable geometry guide vanes and a variable geometry diffuser. The geometry variation of the diffuser is based on the geometry variation of the guide vanes. The method and apparatus ensure that the compressor will operate at peak efficiency over a broad range of load conditions.

Abstract: A roller assembly for guiding the motion of a circumferentially extending ring in a gas turbine engine, where the roller assembly has a pin and a collar. The pin has a head which engages a rotatable element, which in turn adapts the roller assembly to engage a track and which adapts the roller assembly to receive an external force from the track under operative conditions, causing a reactive force on the rotatable element to resist the external force. A gap formed between a shank of the pin and the collar decreases the bending stresses in the shank in comparison to forces acting on the pin at an end of the collar which engages a support.

Abstract: A method is provided for extending the system life of variable geometry components, including variable geometry rings, in an engine system by minimizing relative motion incurred from engine vibrations. Initially, the variable geometry rings are de-tuned from resonant engine vibrations. Damping is then introduced to absorb the impact from the relative motion incurred by engine vibrations and to minimize transmission of the relative motion through the variable geometry components.

Abstract: A housing assembly for a turbine engine has a housing which is adapted to cooperate with an adjacent valve ring assembly. The housing has a plurality of passages for working medium gases which extend radially through the housing and are circumferentially spaced in the housing. The valve ring modulates the flow through the passages. A plurality of flanges extend axially and circumferentially from the housing. Each flange has a track opening which receives a liner and a roller assembly having a bearing surface. The roller assembly in combination with the liner guides the valve ring assembly. The liner and the housing have different physical characteristics, such as a different rate of thermal expansion and different spring rate characteristics which accommodate differences in thermal growth between the liner and the housing.

Abstract: A method for fabricating a turbine inlet casing has several steps. Providing a prismatic block having an upstream face, a downstream face, and a central axis perpendicular to the upstream and downstream faces. Cutting a circular shaft clearance opening through the block, concentric with the central axis. Cutting an inlet plenum through the block along the central axis. The inlet plenum is positioned towards an outer edge of the block. Cutting one or more distribution ports through the block along the central axis. These ports begin close to the inlet plenum and end at annular segments which are concentric with the central axis and at a radial position coincident with the turbine flowpath. The annular ends (of the distribution ports) are spaced circumferentially apart from each other. Cover plates are attached to the upstream and/or downstream faces of the block over the passages and ports. Connecting holes are made between the inlet plenum and the distribution ports.

Abstract: A radial-flow exhaust-gas turbocharger turbine is provided with a row of adjustable guide blades which are rotatable via adjusting shafts mounted in a casing. The guide blades are each provided with sealing discs on their longitudinal sides running at right angles to the adjusting-shaft axes. The diameter of the sealing discs is a multiple of the thickness of the guide blades. The sealing discs which are located on the side remote from the adjusting shafts form bearing points for the guide blades in the casing.

Abstract: An inlet guide vane assembly for a centrifugal compressor includes a guide vane housing having an inlet side for receiving a fluid passing through the compressor at a first flow angle, an outlet side remote from the inlet side and a central axis extending between the inlet and outlet sides of the housing. The assembly has a first set of inlet guide vanes pivotally mounted within the guide vane housing, between the inlet side and the outlet side thereof, for impinging upon the fluid passing through the housing. The assembly includes a second set of inlet guide vanes pivotally mounted within the guide vane housing, between the first set of inlet guide vanes and the outlet side of the housing, for impinging upon the fluid passing through the housing after the fluid has passed through the first set of inlet guide vanes.

Abstract: An aerodynamic-shaped fan blade for use in a fan apparatus. The blade has a cross-section which is essentially an inverted pan-shape with an intermediate section, a leading edge section, and a trailing edge section which form concave and convex surfaces. The trailing edge has a flange doubled back toward the leading edge within the concave envelope.

Abstract: A method and apparatus for regulating fluid flow through a turbine comprising a valve housing positioned in a fluid flow path, the valve housing having a fluid inlet, a fluid outlet, and chamber connecting the fluid inlet and the fluid outlet; a valve sleeve positioned within the chamber, the sleeve comprising a wall having inner and outer surfaces with a plurality of preferably peripherally spaced ports positioned around the periphery of the sleeve, the ports extending between the inner and outer surfaces; a valve head having first and second ends and at least two seal rings with at least one seal ring proximate the first and second ends respectively, the head dimensioned to fit tightly and move reciprocatively within the sleeve; a valve stem having a first and second end, wherein the first end is attached to the valve head, the stem extending away from the valve head; and an actuator attached to the second end of the valve stem.

Abstract: A centrifugal blower apparatus suitable for industrial uses has a least a delivery outlet and at least two fluid inlets disposed on either side of a blower wheel suitable for being rotated by a drive system. Each inlet is associated with a respective control system for controlling the suction flow rte of fluid and is capable of establishing asymmetrical suction flow rates between the inlets. The inlets are fitted with control systems which differ in their mechanical structures and their characteristics concerning fineness of control.

Abstract: A turbocharger with a variable turbine nozzle having a plurality of vanes provides reduced actuation forces by pressure balancing the vane support axles. A nozzle ring and insert ring are secured in substantially rigid spaced relation by a series of hollow spacers and bolts to position the vanes between the nozzle inlet from the volute and nozzle outlet adjacent the turbine. A chamber intermediate the turbine housing and the center housing of the turbocharger accommodates the actuation mechanism for the nozzle vanes and through communication with the nozzle inlet from the volute by the tolerances between the nozzle ring and various elements of the actuation linkage transmits exhaust gas pressure to impinge on an end of the first axle for each vane. Balancing exhaust gas pressure is transmitted through channels between the turbine housing and insert ring, which extend from the nozzle inlet to the apertures receiving the second axles, to impinge on an end of the second axle for each vane.

Abstract: A turbine with the improved inlet casing in accordance with the present invention includes a shaft which extends along and rotates about a central axis. The turbine also includes at least one rotor wheel which is mounted on and extends radially outward from the shaft to a radially outermost periphery. A plurality of buckets are arrayed circumferentially around the rotor wheel at the radially outermost periphery. A housing surrounds the rotor wheel and the stationary flow path component. A plurality of nozzle vanes are circumferentially arrayed in the stationary flow path component which is axially spaced from the buckets of the rotor wheel. The nozzle vanes are configured to direct fluid against an upstream side of the buckets and effect rotation of the rotor wheel. Inlet fingers are formed in the housing, with each of the inlet fingers defining a substantially straight passage between the turbine inlet or a control system and the nozzle vanes of the first stationary flow path component.

Abstract: A roller positioning system for use in a variable pipe diffuser having inner and outer rings. The roller positioning system having at least three axle shafts having a cylindrical body positioned about a first centerline and having a bore disposed axially therethrough about a second centerline. A roller bearing is rotatably mounted to the body of each of the at least three axle shafts. The at least three axle shafts also having a pair of shoulders positioned on either side of the body concentric about the second centerline. The at least three axle shafts circumferentially disposed in the outer ring about the shoulders in a diameter such that the roller bearings nearly contact the outside diameter of the inner ring. The at least three axle shafts rotatably operable to effect an adjustment of the roller bearings about the second centerline such that the roller bearings are brought into contact with the inner ring.

Abstract: An axial restraint system for use in a variable pipe diffuser having an inner ring rotatably positioned within an outer ring. The axial restraint system includes a housing fixedly mounted to the outer ring and having a mounting hole disposed therein in perpendicular arrangement to the inner ring. A shaft having a first end and a second end and having a bearing pad mounted to the first end. The second end of the shaft is threadably engaged within the mounting hole and rotatably operable to effect an adjustment of the position of the bearing pad. The shaft is positioned such that the bearing pad contacts the inner ring and thereby limits the axial movement of the inner ring relative to the outer ring.

Abstract: A drive positioning mechanism for use in a variable pipe diffuser for a centrifugal compressor. A rotational drives means is fixedly attached to the housing of a centrifugal compressor with a pinion gear mounted thereto. A rack gear is mounted to the inner ring and adapted to engage in meshing arrangement with the pinion gear. The rotational drive means is operable to position the inner ring between a fully open position and a partially closed position. A travel limiter is provided to positively limited the travel of the inner ring at the filly open and the partially closed positions.

Abstract: A turbomachine having variable angle diffuser vanes wed with a centrifugal pump. The performance of a diffuser is greatly enhanced by the use of adjustable angle diffuser vanes which can be set to a wide range of vane angles to provide a variable size of an opening between adjacent vanes. The demonstrated pumping system has a significantly wider operating range than that in conventional pumping systems over a wide flow rate, and is particularly effective in the low flow rate range in which known diffuser vane arrangements would lead to surge in the entire system and other serious operational problems.

Abstract: In a hydraulic machine, a stay ring is provided with an upper bearing and an intermediate bearing so that an upper spindle of a guide vane is supported thereon. A bottom ring is provided with a lower bearing so that a lower spindle of the guide vane is supported thereon. The hydraulic machine is designed so that a runner and the guide vane can be removed from the bottom side if the bottom ring and an upper draft tube are removed. The guide vane is supported on the stay ring so as to make a head cover compact and to be capable of lifting the head cover through an upper pit liner if the head cover is formed as an integral structure.

Abstract: An adjusting mechanism for the annular inlet of a radial inflow turbine employing a rotatably mounted adjusting ring as one side of the annular inlet with cams and biased slots controlling primary vanes located within the inlet. A clamping ring which is capable of moving axially is located inwardly of the adjusting ring. A bearing piston ring is mounted to the clamping ring and supports the adjusting ring. The bearing ring also provides some sealing capabilities. A sealing ring between the clamping ring and the housing accommodates some small axial movement of the clamping ring and seals against substantial pressure differential between the inlet and outlet of the nozzle itself. Pins extend across the annular inlet to pivotally mount the primary vanes.

Abstract: A centrifugal fan apparatus for installation in an air plenum adapted to provide pressurized air to a ventilating system includes a centrifugal fan rotor having front and rear sidewalls and a number of blades extending between these sidewalls. The platform has a horizontal base frame on which wheels are rotatably mounted. The front sidewall has a central opening for receiving air while the rear sidewall is attached to a rotatable drive shaft that extends rearwardly from the rotor. A motor is connected to the shaft in order to rotate it and the rotor. A linearly movable platform supports the rotor, shaft and motor and an actuator moves this platform forwardly or rearwardly in order to control the volume of air flowing out of the rotor. An air inlet member is mounted rigidly at the central opening and has a generally cylindrical section that can extend into the rotor when the rotor is moved to a forward position.

Abstract: A valve apparatus for a turbomachine comprises a manifold casing, a valve lift assembly, and a plurality of valve assemblies. The manifold casing defines a valve inlet chamber and has a top wall and a bottom wall with a plurality of vertically disposed openings through the top wall and a plurality of openings to vertically disposed passages in the bottom wall. The passages each extend away from the bottom wall to a passage exit. The valve lift assembly comprises a plurality of lift bars and a plurality of lift pins. The lift pins extend vertically through the vertically disposed openings at the top wall of the manifold casing.