Abstract: The invention relates to a blade and a rotor for a gas turbine and to a method of joining blade parts of a gas turbine, a blade-body section (1) and at least one further blade part (4, 16, 21) being provided, and the blade-body section (1) being provided with at least one end joining area (2 , 3) and the further blade part (4, 16, 21) being provided with an end joining area (6, 18, 24), an inductor (10) being arranged so as to be adjacent to the joining areas (2, 3, 6, 18, 24) of the blade-body section (1) and of the second blade part (4, 16, 21), the joining areas (2, 3, 6, 18, 24) of the blade-body section (1) and of the further blade part (4, 16, 21) being positioned essentially in alignment with and at a distance from one another, and the blade-body section (1) and the second blade part (4, 16, 21) being welded to one another by energizing the inductor (10) with a high-frequency current and by bringing them together with their joining areas (2, 3, 6, 18, 24) touching one another (FIG. 1).

Abstract: A turbomachine includes a coolable arrangement, having a first wail element and having a second wall element. Coolant is used to cool the arrangement in a turbomachine. After the impingement cooling of the first wall element, the coolant is further used for cooling the second wall element.

Abstract: This invention relates to rotary pumps adapted, but not exclusively, for use as artificial hearts or ventricular assist devices and, in particular, discloses in preferred forms a seal-less shaft-less pump featuring open or closed (shrouded) impeller blades with the edges of the blades used as hydrodynamic thrust bearings and with electromagnetic torque provided by the interaction between magnets embedded in the blades and a rotating current pattern generated in coils fixed relative to the pump housing.

Abstract: A diffuser for slowing down a fluid and a method for operating a diffuser is described. A channel of the diffusor has an inlet with a smaller flow cross section than a flow cross section of an outlet and at least one opening for receiving an energizing fluid to be transported selectively into the channel. Pulsations of the impact interface are suppressed effectively at all of the operating points by injecting the energization fluid. Pressures of the fluid moving in the diffusor are measured, and amplitudes and frequencies of the measured pressures are evaluated. Energizing fluid is fed into the diffusor if the amplitudes within a predetermined frequency band exceed a threshold value. The utilization ratio of the inventive diffuser is considerably improved as a result of such a measure.

Abstract: A blowing apparatus with improved energy efficiency, comprising: a circular wall formed at a distance from a blade end of a fan; a first region where an inner diameter is enlarged so that a clearance with the blade end becomes substantially wide, and a second region having a narrower clearance with the blade end and formed with a slit, both regions being on a suction side of the circular wall; and an air pocket portion provided between an outer circumference of the circular wall and an outer peripheral portion of the housing.

Abstract: A covering element is for the protection of components in a machine subjected to high thermal load, in particular of components in a gas turbine. The covering element includes a wall with a hot side capable of being exposed to a hot medium, and with a cool side located opposite the hot side. The cooling side includes a cooling surface capable of being acted upon by a coolant. Holding elements are provided on the cool side.

Abstract: A cooling device is provided for cooling the inside of a main body of an electronic apparatus. The electronic apparatus includes the main body having a movable bottom surface portion and a display unit openable/closable relative to the main body. The cooling device is characterized by including means for transmitting an opening/closing angle of the display unit, and means for driving the movable bottom surface portion in accordance with the opening/closing angle of the display unit transmitted by the transmission means, to enlarge the inner space of the main body, thereby cooling the inside of the main body. Another cooling device is disclosed, which includes means for sucking a first gas, means for discharging the first gas sucked by the sucking means, and means for sucking and discharging a second gas by the action of the first gas discharged by the discharging means.

Abstract: A fan assembly 10 is provided including at least one impeller blade 12, a rotating ring element 14 having a flared inner discharge surface 22, and a shroud element 20 having a shroud exit surface 32 substantially coincident with the flared inner discharge surface 22.

Abstract: A variable pitch fan blade assembly includes a hub, a pitch-adjusting assembly, a fan blade, and an actuator. The pitch-adjusting assembly includes a first element rotatable on a first axis and a second element rotatable on a second axis. The first element presents an elongated pitch pin. The second element defines an elongated pitch slot receiving the pitch pin. The fan blade is coupled to one of the elements for rotation therewith. The actuator is coupled to the other of the elements for rotation therewith. When the actuator rotates the element to which it is coupled, the element to which the fan blade is coupled is rotated via the pin/slot arrangement, thereby adjusting the pitch of the fan blade.

Abstract: A method of making a catheter having a catheter shaft, the method including axially deflecting at least a section of the catheter shaft. The shaft section is axially deflected in a first radial direction on the shaft circumference one or more times. In a presently preferred embodiment, the method further includes axially deflecting the shaft section in at least a second radial direction on the shaft one or more times. The axial deflection produces stress in at least a section of the polymeric tubular member which reduces the push force of the shaft and catheter. The invention is also directed to a catheter shaft formed using the method of the invention, the catheter shaft generally comprising a polymeric tubular member. The polymeric tubular member has a section with deflection-induced stress from axial deflection of the section, so that the shaft has a push force reduced by the axial deflection-induced stress.

Abstract: A fluid flow controller and method of operation thereof are presented. The fluid flow controller may include a casing having a casing blade. The fluid flow controller may also include a rotor having a first rotor blade and a second rotor blade radially spaced from the first rotor blade. The rotor may be configured to rotate relative to, and preferably within, the casing such that the casing blade passes between the first and second rotor blades during use. Compared to conventional pumps or compressors, the present fluid flow controller may have an enhanced ability to accelerate (and possibly to subsequently pressurize) fluid flow. Thus, the need to use multiple stages may be reduced or eliminated.

Abstract: In a steam turbine, a combined brush and labyrinth seal is provided between a diaphragm web and a sealing surface on a rotatable component radially outwardly of the rotor surface. The contact between the brush seal and sealing surface lies along an axially upstream projecting flange of an annular platform such that heat generated by frictional contact between the bristles and the sealing surface has minimal effect on the rotor surface and hence rotor dynamics. A backup labyrinth seal is provided between the web and platform. Additionally, axially upstream projecting flanges are provided on the downstream buckets and which flanges are spaced radially outwardly of the rotor surface and lie in registration with the diaphragm web. Labyrinth teeth seal between the diaphragm web and the bucket flanges serving as a backup seal.

Abstract: Improved fan grill/guard construction for fans for supplying air, where the fan has a front grill with an outer ring which wraps around and is dimensionally structured to improve airflow and to diffuse the air over a wide area.

Abstract: In an electronic component mounting method and apparatus, an electronic component is taken out from an electronic component feed position, a posture of the component is detected, and the component is mounted on a board based on a detected result. The method includes acquiring image data with a camera of the component from the feed position, processing acquired image data with a plurality of algorithms for detecting postures of components, and detecting a posture of the component.

Abstract: An electrical appliance housing is disclosed having a housing with an open side portion and an open front portion adjacent and perpendicular to the open side portion. A removable end panel is provided to fit within the open side portion of the housing and may include an elastically deformable detent mechanism on the side edges of the end panel to temporarily lock it to the housing. An interchangeable modular component is provided within the housing for establishing the function of the electrical appliance housing. The electrical appliance housing function may include air conditioning, air moving, light emitting, infrared light emitting or any other function desirable in a ceiling or wall appliance. The modular components are interchangeable, such that the function of the electrical box may be changed at any time by interchanging the modular components within the housing to the desired set-up.

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: The invention is a method and system for fan flutter control. The output of circumferentially distributed sensors is used to calculate the asymmetry of a flow field. The asymmetry measurement is used to modulate a bleed valve, variable exhaust nozzle or other device to increase the fan's tolerance of flutter disturbances.

Abstract: A rotor assembly for a gas turbine engine includes a plurality of radially extending and circumferentially spaced rotor blades and a seal. Each of the blades includes a platform including a radially outer surface and a radially inner surface. The platform radially outer surface defines a surface for fluid flowing thereover. The seal includes at least one hollow member coupled to each rotor blade platform radially inner surface that is configured to reduce fluid flow through a gap defined between adjacent rotor blades.

Abstract: A gas turbine has circumferential arrays of nozzles and shrouds and a plurality of combustors for flowing hot gases of combustion through respective sets of adjacent nozzles and shrouds. First and second nozzles of each set of nozzles are subject to different known inlet conditions of the hot gases of combustion flowing from the associated combustor and transition piece. The first nozzle in each set is preferentially located relative to the second nozzle of that set at a circumferential location relative to the associated combustor based on the known different inlet conditions. The first and second nozzles are therefore qualitatively different from one another dependent on those different inlet conditions. Similarly, the shrouds are subject to different inlet conditions and are preferentially designed and located based on those known inlet conditions.

Abstract: A steam turbine for a combined gas and steam-turbine power plant process, including at least one valve arrangement for the controlled feeding of live steam into the steam turbine is disclosed. The valve arrangement has a quick-closing valve and at least one live-steam control valve assigned to the quick-closing valve. In addition, the steam turbine has a live-steam bypass, which, feeds live steam as “bypass steam” into the high-pressure region of the steam turbine through at least one bypass line and through a bypass feed assigned to each bypass line, but after the first turbine moving-blade row, as viewed downstream of the steam-turbine inlet region. At least one live-steam control valve and at least one bypass control valve are assigned to at least one quick-closing valve. Further, a method of feeding bypass steam into the steam turbine is disclosed.