Steam turbine flow path |
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IPC classes for russian patent Steam turbine flow path (RU 2296228):
  
 Turbine adjustable nozzle assembly / 2294439
Invention can be used in transport gas-turbine engines and turbocompressors of internal combustion engines. Proposed adjustable nozzle assembly of turbine has vanes with turnable axles arranged between housing. Turnable axles are sectional, being made of material with memorized shape effect. Iron and nickel-based alloys are used as memorized shape effect materials in which martensite transformation takes place at different temperatures.
 Gas turbine stator / 2278274
Proposed stator of gas turbine has housing with channel to pass gases, ring member arranged around stator housing at a distance in radial direction and functionally coupled with housing, and intermediate members holding ring member at a distance from stator housing in radial direction. Intermediate member are arranged over circumference of ring member at distance from each other and are provided with movable member. Said movable member thrusts against stator housing or ring member with possibility of displacement. At least one of intermediate members features elastic properties in direction of stator radius, and at least one other intermediate member has no such properties.
 Device to control position of blades with adjustable angle of setting / 2272913
Proposed device to control position of blades with adjustable angle of setting in turbomachine has tie-rod, mating devices, locking devices and means for holding said tie-rod on said root of blade for combined turning without play. Mating devices forming hinge joint between first end part of tie-rod and rotary ring are provided with pin passing through first through hole made in first end part of tie-rod and getting into radial socket in rotary ring. Said pin is held in position by locking with ports to pass pins and installed for displacement on rotary ring. Locking devices used to hold second end part of tie-rod on root of adjustable blade are provided with locking screw passing through second through hole made in second end part of tie-rod and getting into groove in root of adjustable blade.
 Axial-flow turbine stator blade / 2272151
Proposed blades of axial-flow turbine stator has channel expanding into cone to pass flow of gas through turbine. Blade is provided with flat at its root which is connected with stator housing with provision of tight fit and reliable locking of joint. Stator blade root is made in form of hollow profile with radially inner flat of blade root which is made to suit contour of channel to pass flow of gas through turbine and radially outer flat of blade root arranged at a distance inner flat from and made to suit contour of stator housing, and also side wall or two, mainly parallel, side walls. Outer flat is provided with at least one hole to accommodate corresponding attachment part by means of which said is secured on stator housing.
 Turbine nozzle box of gas-turbine engine / 2260700
Proposed nozzle box of turbine of gas-turbine engine has nozzle vanes with trunnions and ring projections. Inner ring with ring groove is fixed on inner flanges of nozzle vanes in which vane ring projection is fitted. One of flanges of inner ring is furnished with axially extended ring bead with radial slot in which trunnion of vane nozzle is arranged. Difference between distance from axis of bolt of fastening flange of inner ring and inner surface of ring projection of nozzle vane and distance between axis of bolt of fastening flange of inner ring and outer machined surface of nozzle vane trunnion is greater than zero.
 The cooled jet vane of a gas turbine / 2237811
 To allow the apparatus axial turbine / 2232902
The invention relates to low-flow turbines, which are widely used in power industry, shipbuilding
 Supporting and locking means for the nozzles high pressure stage in gas turbines / 2223406
The invention relates to a supporting and locking means for the nozzles high pressure stage in a gas turbine
 System steam supply to the turbine cylinder / 2217598
The invention relates to power engineering and can be used to create a new steam turbine or their modernization
Turbine nozzle box of gas-turbine engine / 2260700
Proposed nozzle box of turbine of gas-turbine engine has nozzle vanes with trunnions and ring projections. Inner ring with ring groove is fixed on inner flanges of nozzle vanes in which vane ring projection is fitted. One of flanges of inner ring is furnished with axially extended ring bead with radial slot in which trunnion of vane nozzle is arranged. Difference between distance from axis of bolt of fastening flange of inner ring and inner surface of ring projection of nozzle vane and distance between axis of bolt of fastening flange of inner ring and outer machined surface of nozzle vane trunnion is greater than zero.
Axial-flow turbine stator blade / 2272151
Proposed blades of axial-flow turbine stator has channel expanding into cone to pass flow of gas through turbine. Blade is provided with flat at its root which is connected with stator housing with provision of tight fit and reliable locking of joint. Stator blade root is made in form of hollow profile with radially inner flat of blade root which is made to suit contour of channel to pass flow of gas through turbine and radially outer flat of blade root arranged at a distance inner flat from and made to suit contour of stator housing, and also side wall or two, mainly parallel, side walls. Outer flat is provided with at least one hole to accommodate corresponding attachment part by means of which said is secured on stator housing.
Device to control position of blades with adjustable angle of setting / 2272913
Proposed device to control position of blades with adjustable angle of setting in turbomachine has tie-rod, mating devices, locking devices and means for holding said tie-rod on said root of blade for combined turning without play. Mating devices forming hinge joint between first end part of tie-rod and rotary ring are provided with pin passing through first through hole made in first end part of tie-rod and getting into radial socket in rotary ring. Said pin is held in position by locking with ports to pass pins and installed for displacement on rotary ring. Locking devices used to hold second end part of tie-rod on root of adjustable blade are provided with locking screw passing through second through hole made in second end part of tie-rod and getting into groove in root of adjustable blade.
Gas turbine stator / 2278274
Proposed stator of gas turbine has housing with channel to pass gases, ring member arranged around stator housing at a distance in radial direction and functionally coupled with housing, and intermediate members holding ring member at a distance from stator housing in radial direction. Intermediate member are arranged over circumference of ring member at distance from each other and are provided with movable member. Said movable member thrusts against stator housing or ring member with possibility of displacement. At least one of intermediate members features elastic properties in direction of stator radius, and at least one other intermediate member has no such properties.
Turbine adjustable nozzle assembly / 2294439
Invention can be used in transport gas-turbine engines and turbocompressors of internal combustion engines. Proposed adjustable nozzle assembly of turbine has vanes with turnable axles arranged between housing. Turnable axles are sectional, being made of material with memorized shape effect. Iron and nickel-based alloys are used as memorized shape effect materials in which martensite transformation takes place at different temperatures.
 Steam turbine flow path / 2296228
Invention is aimed at increasing economy of first non-controlled stages of steam turbines with nozzle steam distribution. According to invention flow path of known steam turbine containing nozzle box assembly accommodating nozzle blades, controlled stage working wheel, diaphragm of first non-controlled stage with fitted-in nozzle blades, working wheel and chamber formed between said wheel of controlled stage and diaphragm of first non-controlled stage is furnished with convex-concave screen installed before nozzle assembly of diaphragm provided with perforations, convex part being arranged opposite to nozzle assembly and pointed into chamber, and concave part is extended in radial direction towards rotor axis. Holes of perforation are of different size. Diameter of holes in part far from rotor axis is at least twice as small as diameter of holes located close to rotor axis.
 Steam turbine intake hole and method of its modification / 2302533
Pair of ports of intake hole is arranged at opposite sides of steam turbine casing to provide passing of steam in opposite directions along circumference in ring-shaped steam chamber to first stages of turbine through axial opposite outlet holes. Parts of chamber in upper and lower casings has cross sections decreasing in common direction along circumference from sections of intake hole for steam to provide uniform flow of steam relative to chamber in common inner direction and through axial outlet holes and near holes.
 Nozzle guide assembly of radial-flow turbine / 2306425
Proposed nozzle guide assembly of radial-flow turbine contains nozzle vanes, drive and adjusting device. Nozzle vanes are uniformly spaced around axle of turbine wheel and are installed by trunnions in turbine casing for adjustable turning in channel formed by walls of casing. Adjusting device is made in form of ring turn synchronizer engaging with nozzle vanes through guides secured on their trunnions. Each guide is made in form of bellcrank whose free ends are arranged in radial slots of turn synchronizer. Said turn synchronizer is made in form of two concentric disks, inner and outer ones, interconnected for relative turning, each disk being located by radial slots from free ends of bellcranks pointed to disk.
 Nozzle box assembly for high-temperature cylinder of steam turbine / 2307254
Proposed nozzle box assembly of high-temperature cylinder of steam turbine includes supply section, transient section and section delivering steam to nozzle segments. Nozzle box assembly is made up of sections welded together, supply section is made of pipe, transient section is made in form of cone changing from pipe into oval, and steam dispensing section is made of two rings, outer and inner ones, with blanks on end faces. Proposed invention provides minimum labor input and metal usage in manufacture, reduced to minimum time taken for heating nozzle box assembly owing to use of more thin walls of welded structure and, consequently, reduced time of starting of high-temperature steam turbine.
 Cooled turbine guide blade and turbine having said blades / 2308601
Guide blade of gas turbine engine comprises front and rear edges, pocket, wing back, as well as opened perforated insert, inlet orifice to supply cooling air inside insert and outlet orifice to remove cooling air portion from blade. The insert defines annular cavity arranged between outer side wall thereof and inner blade wall. Blade has bridges located in cavity part between the insert and inner surface of rear edge to increase blade rigidity. One insert end is fixed to blade. Another one is installed so that the insert end may slide along inner edge of blade under the action of mutual thermal insert expansion relatively inner blade wall. Orifices are created in opened insert so that the orifices are located only in two insert areas. Orifices of the first group are opposite to inner surface of front edge. Orifices of the second group are opposite to inner surface of rear edge to prevent air jet impingement upon bridges.
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FIELD: power engineering. SUBSTANCE: invention is aimed at increasing economy of first non-controlled stages of steam turbines with nozzle steam distribution. According to invention flow path of known steam turbine containing nozzle box assembly accommodating nozzle blades, controlled stage working wheel, diaphragm of first non-controlled stage with fitted-in nozzle blades, working wheel and chamber formed between said wheel of controlled stage and diaphragm of first non-controlled stage is furnished with convex-concave screen installed before nozzle assembly of diaphragm provided with perforations, convex part being arranged opposite to nozzle assembly and pointed into chamber, and concave part is extended in radial direction towards rotor axis. Holes of perforation are of different size. Diameter of holes in part far from rotor axis is at least twice as small as diameter of holes located close to rotor axis. EFFECT: reduced peripheral nonuniformity of steam flow before nozzle assembly of first non-controlled stage and increased efficiency of non-controlled stage. 2 cl, 1 dwg
The invention relates to the field of power engineering and is intended to improve the efficiency of the first fixed-speed steam turbine with nozzle steam distribution. Known flow part of the steam turbine (1), containing the nozzle box, impeller regulatory step, the chamber for regulating the level and irregular steps, each of which consists of a diaphragm with deployme grilles and wheels with working lattices. Pairs to regulatory step is supplied through four nozzle boxes. During nominal operation open are only three boxes, and the arc of the steam supply to the impeller rarely exceeds 290°. With such a holistic regulatory step even if there is a large surge chamber supply steam to the next (first) unregulated stage also comes with a big ring irregularity. As a result, the first group of unregulated speed even when the nominal mode of operation of the turbine is reduced efficiency. The fall of the efficiency of these steps, due to uneven supply of steam reaches 2-3% (2). Closest to the proposed technical solution is flowing part of the steam cogeneration turbine T-250/300-240 Ural Turbomotor works (3)containing the nozzle box located next to it deployme blades first is regulatory step, the impeller regulatory step, the chamber of the regulating stage, located in her peripheral rim, designed to organize the supply of steam to the nozzle arrays, the first fixed stage, consisting of a diaphragm first unregulated level established therein deployme blades, impeller and subsequent unregulated level. The technical problem solved by the invention is the reduction of circumferential non-uniformity of the flow of steam before the nozzle device of the first unregulated stage and increase the efficiency of the unregulated level. The problem is solved in that the flowing of the well-known steam turbine, nozzle containing a box placed in her deployme blades, impeller regulatory step, the diaphragm first stage with unregulated installed it deployme blades, the impeller and the chamber formed between the said regulating wheel speed and aperture first unregulated stage, located in her peripheral rim, according to the invention, provided with a convexo-concave screen installed in front of the nozzle aperture is made with perforations, and the convex part is located opposite the nozzle device and facing the camera, and the concave portion is extended in the radial direction in store is well a rotor axis. In addition, the perforation holes are made of different sizes, in part, the most remote from the axis of the rotor, the diameter of the holes, at least two times smaller than the diameter of the holes located closer to the rotor axis. The drawing shows the proposed device in the section. Flowing a portion of a steam turbine nozzle contains a box of 1 (the number of them is usually four, in the drawing shows a section of one of them) placed in it deployme blades 2, the impeller 3 regulatory step, the diaphragm 4 is placed in her deployme device 5, in the chamber 6 formed between the impeller 3 and the diaphragm 4, installed peripheral edges 7 by the number of nozzle boxes 1, intended for the organization of the steam supply to the nozzle device 5 unregulated level. Before each of the nozzle device 5 is convexo-concave screen 8. Moreover, the convex part of which is located opposite the nozzle device 5 and the bulge facing the camera 6 and the concave portion is extended in the radial direction towards the axis of the rotor 9. Screen 8 are perforated and the perforation holes are made of different sizes, namely: in the part of the screen 10, the most remote from the axis of the rotor 9, the diameter of the holes, at least two times smaller than the diameter of the openings located in the side of the screen 11, which is closer to the axis of the Roto is 9. The device operates as follows. When steam escapes from the impeller 3 regulatory step in active arc admission steam meets the face of the screen 10 with the small holes of the perforation and is distributed both in the circumferential and radial (towards the center) directions. Because moving to the center of the perforation holes in the side of the screen 11 are significantly large, then the main part of the thread falls off the screen in its lower half. The degree circumferential non-uniformity of the flow behind the screen 8 is significantly lower than in front of the screen. The result is virtually a full supply of steam to Solovay apparatus of the first unregulated stage and accordingly the efficiency of the first compartment unregulated stage Sources taken into account 1. Trugny A.D., Lomakin BV Cogeneration steam turbine and turbine installations. Publishing house of MPEI. Part two. Construction of cogeneration steam turbines. Str. 2. Paramonov A.N. Research and development of systems of unregulated extraction turbine and nuclear power plants. Abstract of Diss. on competition of a scientific degree of Cand. of technical Sciences, 1990., p.80-90. 3. Segleau AV Steam turbine. Publishing house "Energy", 1976, str. 1. Flowing a portion of the steam turbine, nozzle containing a box placed in her deployme blades, the working number is from a regulatory step, the diaphragm first stage with unregulated installed it deployme blades, the impeller and the chamber formed between the said regulating wheel speed and aperture first unregulated stage, located in her peripheral rim, characterized in that it is provided with a convexo-concave screen installed in front of the nozzle aperture is made with perforations, and the convex part is located opposite the nozzle device and facing the camera, and the concave portion is extended in the radial direction towards the rotor axis. 2. Flowing a portion of a steam turbine according to claim 1, characterized in that the perforation holes are made of different sizes, in part, the most remote from the axis of the rotor, the diameter of the holes, at least two times smaller than the diameter of the holes located closer to the rotor axis.
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