Abstract: The present invention relates to turbomolecular vacuum pumps and an arrangement for reducing or eliminating an accumulated static charge in the rotor caused by an interaction of the rotor with either electrically charged or neutral particles in the pumped media. Electrical charge exchange between the rotor and the electrically grounded stator is effected through a wire or other means of electrical contact, or through charge emission devices such as a field emission tip. In either case, electrostatic charges in the rotor are reduced or eliminated.

Abstract: A fuel pump assembly is provided. The assembly includes a first pump component having a first substrate and a first coating disposed on the first substrate. The assembly further includes at least one second pump component having a second substrate and a second coating disposed on the second substrate, wherein the first and second coatings are configured to repeatedly impact one another. In addition, the first coating may be selected from the group consisting of metal nitrides and diamond like carbon, and the second coating may be selected from the group consisting of metal nitrides and diamond like carbon.

Abstract: A method and means of counteracting the effects of variation in static pressure acting upon a hollow rotor blade or hydrofoil (6, 7) for devices capable of extracting energy from a moving column (8) of water or other liquid within which the rotor of hydrofoil is located whether the device rotates as in the case of an axial flow turbine or whether it reciprocates in the flow such that cyclic static pressure fluctuations caused by vertical movement of the rotor blades or hydrofoils through the water column (8) including the step of equalising the pressure inside and outside the rotor blade or hydrofoil by filling any voids (17) within the hollow rotor blades or hydrofoils with a liquid in such manner as to allow the external surface (26) of said rotor blades or hydrofoils to “breathe”; i.e.

Abstract: A welded component includes at least one high temperature segment of a high alloy Cr steel with high creep strength and a low temperature segment of a low alloy steel with high toughness and/or a high yield strength which are connected materially to one another via a weld joint. In one such component a gradual transition of chemical, physical and mechanical properties in the joining area is achieved in that between the weld joint and the high temperature segment there are at least two successive clad layers of at least two lower alloy weld metals with a total content of elements which increase the creep strength, such as for example Cr, Mo, W and V, which total content decreases toward the weld joint, and/or an increasing total content of elements which increase the toughness and/or yield strength, such as for example Ni and Mn, which total content increases toward the weld joint.

Abstract: A shaftless rotor includes at least two recessed portions. The portions are shaped to enable the rotor to rotate by the application of fluid flow to the rotor. The centre of mass of the rotor is substantially at the centre of the volume of space occupied by the rotor.

Abstract: At first, a brazing filler metal sheet is prepared (step S1). The brazing filler metal sheet comprises a brazing filler metal layer, a sticking material layer, and a released paper. The brazing filler metal layer comprises a brazing filler metal. A coating material layer is laminated on the brazing filler metal layer (step S2). The coating material layer comprises a mixture of coating material particles and a binder. As the coating material particles, MCrAlY particles and abrasive particles (cubic boron nitride particles or the like) are used. The coating material layer is then dried (step S3), and the brazing filler metal sheet is cut (step S4), and adhered to a rotor blade (step S5). The rotor blade is heated (step S6), to melt the brazing filler metal. The brazing filler metal gets wet as a liquid phase around the MCrAlY particles, and diffuses due to the heat treatment holding process. A solidified layer is then formed by cooling (step S7).

Abstract: An energy exchanger device can be used for exchanging pressure energy from one fluid to another, or may act as a hydraulic compressor or fluid driven pump. A preferred device uses a jet nozzle to rotate a cylindrical rotor block having a number of axially oriented conduits within it. As the rotor turns, one end of each of the conduits is alternately connected, through a first set of ports, to either an inlet for a high pressure fluid, or an outlet for the high pressure fluid from which the energy has been extracted. Correspondingly, the other end of each of the conduits is alternately connected to either an inlet for a low pressure fluid or an outlet for the fluid to which the energy has been transferred. A freely sliding element, such as a ball, may be placed in each of the conduits to isolate the two fluids from each other.

Abstract: A self priming pump attachment for transfer of liquids, such as water, attached to a rotating driving source. The rotating driving source can be a string trimmer, a drill or similar apparatus for creating a “wand” with the pump attachment on the end for placement into the liquid. The invention is affixed to the rotating driving source which drives an impeller. A drive shaft can also be used. The impeller has a plurality of veins at a optimal pitch which depends on the speed of the driving source, the density of the liquid and the distance of the discharge point from the pump housing. The pump housing encloses the impeller and contains apertures on a lower portion for drawing in the liquid, and an exit aperture on a top portion for discharging the liquid. Tubing can be affixed to the exit aperture for discharging the liquid at a desired location.

Abstract: A marine in line bilge blower and a method of manufacturing same are described. The blower, or fan, includes a housing in which a motor, airfoils, a fan wheel hub, and straightening vanes are positioned. Specifically, numerous airfoils are positioned on a fan wheel hub, which is in connection with a motor. The motor is mounted on one of several straightening vanes. The housing includes a base with a pair of feet. To protect the circumference of the housing from physical and thermal stress, strengthening rings are positioned on the circumference.

Abstract: The invention relates to the design of the root of a stator vane in an axial flow turbine, for fixing the stator vane (3) to the stator casing (1) by means of attachment elements, preferably by means of attachment screws (9), which act with a force fit. In order to avoid the disadvantages of solutions of this generic type, in particular in order to reduce the thermal stress on the attachment elements and on the stator casing, the invention proposes that the stator vane root be designed as a hollow profile, comprising a radially inner platform (4) matched to the contour of the flow channel (19) and, at a distance from it, a radially outer platform (5) matched to the contour of the stator casing (1), as well as two essentially parallel sidewalls (6) and (7), wherein the outer platform (5) is equipped with at least one hole to accommodate an attachment element (9) preferably a screw, originating from the stator casing (1).

Abstract: The present invention relates generally to a turbine engine (10) comprising a housing (12) in which a rotor (14) is rotatably mounted. The housing (12) of the turbine engine (10) is of a split casing construction including a center casing (24) sandwiched between a pair of outer casings, namely an inlet outer casing (26) and an outlet outer casing (28). The rotor 14 is shaped circular in profile and includes three working surfaces generally defined by a peripheral surface (32) and a pair of opposing sides surfaces (34) and (36), respectively. The peripheral surface (32) of the rotor (14) which acts as a fist stage of the turbine (10) includes a plurality of circumferentially spaced and generally axially directed ribs in the form of a series of arcuate flutes such as (38).

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 thermal insulator between the turbine and the compressor of a gas turbine engine is provided and at the same time it enables the air that has passed through the compressor to be heated by the heat of the hot turbine. A gas turbine engine comprises a centrifugal compressor for compressing air that is drawn or sucked into the compressor, a compressed air passage supplying the air compressed by the compressor to a burner, and a turbine driven by means of combustion gas generated in the burner. The compressor and the turbine are provided on a rotating shaft adjacent to each other in the axial direction. Evaporation sections on the radially inner side of a plurality of heat pipes provided in a radial form face towards the outer periphery of the rotating shaft between the compressor and the turbine, and condensation sections on the radially outer side of the heat pipes face towards the compressed air passage.

Abstract: A hydraulic drive with regeneration circuit comprises a pump, a hydraulic actuator and a rotary flow divider which operates in conjunction with valve means to provide regeneration flow for the hydraulic drive.

Abstract: An apparatus preventing adhesion, growth and freezing of ice pieces, which tend to happen with quality artificial snow such as fine flake snow and powder snow. The rotary valve 1 to feed artificial snow at a constant rate includes: impeller rotary shaft 3 which is placed in cylindrical casing 2 along the length direction of the cylinder; a plurality of impellers 4 which are arranged around impeller rotary shaft 3 at an equal distance from each other in the radial direction; opening 25 for loading of artificial snow which connects the top portion of a wall of cylindrical casing 2 with the top portion of a housing; opening 7 for receiving compressed air which is formed on casing side wall 6 to receive said compressed air from a blower; and an exit 10 for artificial snow formed at the other casing side wall 9 to blow out artificial snow, cut in a given amount, with compressed air.

Abstract: In the present invention, various sizes of non-wetting droplets are inserted into microtube devices of various shapes having therein a gas or wetting fluid which causes the droplets to movement in response to fluid pressure. The droplets may translate within a void of the microtube device which is filled with the gas or wetting fluid or rotate in a fixed position. The nonwetting fluid may also be formed into rings within ring shaped channels. The microtube devices may operate to stop fluid flow, act as a check-valve, act as a flow restrictor, act as a flow regulator, act as a support for a turning axle, and act as a logic device, for example.

Abstract: An anti-windage device is provided for use on the couplings formed by mating flanges of rotors for turbomachines, such as steam turbines and the like. The anti-windage device is comprised of upper and lower anti-windage ring segments. The anti-windage ring segments have holes for each of the nuts that are threaded onto the bolts that join the mating flanges into a rotor coupling. The holes enclose the nuts and the anti-windage ring segments fill the circumferential spaces between adjacent nuts. The ring segments are secured to the rotor flange by causing the nuts to bear against an annular lip formed in each hole. The depth of the holes and the axial thickness of the anti-windage ring is such that the end faces of the anti-windage ring, nuts and bolts are flush, thereby forming a smooth surface that minimizes windage.

Abstract: A diaphragm, suitable for use in automotive applications, which comprises a base fabric having bonded to at least one surface a fluororubber layer by an adhesive which includes an acrylonitrile-butadiene or acrylonitrile-isoprene rubber having an amino group. There is also a described a method of making the diaphragm.

Abstract: An improved steam turbine system is provided having a hardfacing disposed on a portion of its steam inlet chamber wear surfaces. The invention also includes a novel stacked ring design having a hardfaced inlet sleeve and stationary, nitride sealing rings for minimizing wear. Also included are novel heat treatments and metallurgical processes for stress relieving these hardfaced components. The techniques and designs employed, decrease steam leakage and assure longer service life for steam powered turbines.