Abstract: A seal arrangement for preventing leakage of a fluid from a high pressure region to a lower pressure region through a radial gap defined between a stationary member and a member rotating relative thereto. A stationary seal member is provided which substantially closes the radial gap but which defines a narrow radial clearance therebetween. Deflector seals are mounted on the rotating member and exhibit predetermined axial alignment with the stationary seal, the deflector seals extending radially outward from the rotating member for a distance less than the clearance defined between the stationary seal and the rotating shaft.

Abstract: A steam turbine power plant having associated therewith a closed loop flow arrangement for extracting heat from the power plant and supplying the extracted heat to an external heat load. Included within the flow arrangement is a predetermined number of heater elements, each of which extracts steam having a predetermined heating capacity associated therewith from a predetermined number of separate locations within the power plant. The heat so extracted is transferred to a heat transfer medium flowing at a predetermined flow rate within the closed loop arrangement. The extracted heat is exchanged to the heat load within a heat exchanger element connected within the flow arrangement. The amount of heat extracted from the power plant is functionally related to, and automatically limited by, the flow rate of the heat transfer medium within the closed loop arrangement. The flow rate of the heat transfer medium is itself functionally related to the flow rate of the motive fluid for the power plant.

Abstract: A device for positioning a thrust bearing with respect to a stationary element within an axial flow turbine apparatus. The device comprises a first threaded member disposed retractably within the stationary element and engaging the bearing to position the bearing vertically with respect to an axis extending through the turbine casing. A second threaded member is retractably positioned within the stationary element and abuts against the bearing to position the bearing at a point along the axis of the casing. A securing member extends through a portion of the bearing and engages the first threaded member to secure the bearing in the axial and vertical position within the stationary element. Suitable set screws are provided to maintain the positions of both the first and the second threaded members within the stationary element and the engagement of the securing member with the first threaded member.

Abstract: An apparatus for welding the circumference of an elliptical member is characterized by welding torch movably mounted on a support framework. A turntable rotates the elliptical member at a variable speed so that the travel under the welding torch is constant and that each point of the circumference of the elliptical member is successively the greatest distance above a horizontal reference datum. A control arrangement is provided to move the welding torch along the support framework so as to locate the torch adjacent each successive point on the elliptical member that is the greatest distance above the horizontal datum.

Abstract: Blocks are disposed in notches in a wrapper encircling a tube bundle of a steam generator, covers are disposed over a plurality of holes in blowdown pipes; the ports in the feedwater header are arranged to improve the flow of feedwater and recirculation water over the tube sheet of the steam generator.

Abstract: An elastomeric seal for sealing a large annular space having a groove on the low pressure side so that the seal will deflect easily when inserting a cylinder from the low pressure side and will withstand high differential pressure without blowing through.

Abstract: A resilient insert for explosively expanding a tube in a tube sheet having a bore which receives an explosive cord, a counter bore, a sleeve which is fastened to the bored end of the insert to position the tube and a positioning wafer which positions the explosive cord within the insert.

Abstract: A method for altering the lateral dimension of the focal zone produced by an integral ultrasonic lens system. The method comprises the steps of removing a volume of lens material from the integral lens system so as to define two separate and distinct remainder volumes on each side of the removed volume. The remainder volumes are then laterally or rotationally displaced relative each other to alter the lateral dimension of the focal zone produced by the integral lens or to produce a discrete focal zone for each of the remaining lens volumes.

Abstract: Method for explosively expanding sleeves into heat exchanger tubes disposed in a tube sheet utilizing shaped charges in conjunction welding and brazing techniques to affectuate tube modifications and repairs including the steps of shaping the sleeve, placing specially shaped inserts into the sleeves, varying the explosive charges within the inserts and varying the confinement of the explosive charge within the insert to explosively weld the sleeve to the tube, expand the sleeve to the tube, and/or expand the tube to engage the tube sheet and welding or brazing one end of the sleeve to the tube to form a seal.

Abstract: Apparatus for enlarging a portion of a bore of a rotor includes a rotor support and drive and a boring bar with controlled fly cutters, which operate in unison with an indicator that follows a template shaped to correspond to the desired shape of the enlargement.

Abstract: An elastomer impregnated with carbon is utilized in conjunction with a conductor to test the dielectric adequacy of a nonconductor and to indicate physical defects, such as cracks, pinholes or a thickness below a predetermined minimum, by depositing traces of carbon on the nonconductor in the area of the defect or the area where the thickness is below the predetermined minimum.

Abstract: A multihead welding gun which has one or more self-aligning heads for simultaneously forming 360.degree. welds between the juncture of recessed tubes and a tube sheet.

Abstract: A bearing lubrication system for turbine apparatus. Lubricating fluid stored in a pressurized oil reservoir is pumped by a main oil pump to the bearings. An oil cooler is provided immediately upstream of the pressurized reservoir to lower the temperature of the fluid stored therein and provided to the bearings. Oil returned from the bearings is drained to a nonpressurized oil collection chamber which supplies the suction of the main oil pump. An emergency gas system is included to insure an independent oil flow capacity in the event of interruption in power to, or failure of, the main oil pump.

Abstract: A hydraulic arrangement for turning the rotor shaft of an axial flow elastic fluid turbine rotor. The arrangement includes a variable speed hydraulic motor, the torque produced thereby being dependent upon the pressure of motive fluid supplied therethrough. The motor is connected through suitable coupling or clutch to the shaft. A plurality of sources of motive fluid each at a predetermined pressure range are connected to the motor. A flow control arrangement for selectively introducing motive fluid from each of the plurality of sources to the hydraulic motor to provide the desired torque output from the motor is provided.

Abstract: A locking bar having feet which engage staggered finned-tubes of a heat exchanger to fix their positions in a support assembly formed from a plurality of support bars having interlocking arms.

Abstract: A shell and tube steam generator having a feedwater inlet ring disposed above the tubes, the feedwater inlet ring having a plurality of J-shaped discharge nozzles asymmetrically disposed in fluid communication with the upper portion thereof.

Abstract: A system for bypassing compressed air and regulating the fuel to rapidly vary the load on a gas turbine so that the turbine can absorb energy and pick up load rapidly without inducing high temperature stresses within the turbine.

Abstract: A wet cooling tower has an encircling exhaust header in communication with the exhaust of a plurality of gas turbines and a plurality of upwardly inclined conduits, which direct the hot exhaust gas tangentially into the cooling tower to increase the temperature and velocity of the moisture laden air flowing therethrough to lift the effluent air into the upper atmosphere and eliminate the plume under many weather conditions.

Abstract: Cushions made of metal wire provide passageways for cooling air and a resilient layer between metal and ceramic parts in a ceramic blade assembly for a gas turbine.

Abstract: A method of repairing a tube in a heat exchanger by severing the tube and welding a sleeve inside the tube.