Procedure for fabrication of blade of guiding mechanism of steam turbine

IPC classes for russian patent Procedure for fabrication of blade of guiding mechanism of steam turbine (RU 2418175):

F01D9/02 - Nozzles; Nozzle boxes; Stator blades; Guide conduits

F01D25/32 - Collecting of condensation water; Drainage

Another patents in same IPC classes:

Stator blade with alternate angle of assembly, gas turbine motor with such blade and procedure for repair of such blade / 2416725

Stator blade with alternate angle of assembly installed in case of gas-turbine motor consists of blade body, of platform, of fulcrum pin, of piece with disk and of at least one stop tongue. The disk of the piece with its one side is positioned on the platform and with its another side rests on a wall of the case directly or by means of a bushing. The piece is stationary in rotation relative to axis of the fulcrum pin. Each stop tongue is rigidly tied with the disk and interacts with a complementary surface corresponding to a flat made on the platform. The fulcrum pin consists of a ring-like yoke forming a bearing; in the disk of the piece there is made the central orifice large enough to ensure piece passing along the fulcrum pin. Another invention of the group refers to the gas-turbine motor containing at least a row of stator blades with alternate angle of assembly; the blades are installed in the case and are equipped with the above said piece interacting with a bushing positioned in a seat of the case. One more invention refers to the procedure for repair of the blade with alternate angle of assembly, platform of which has a worn part caused by friction with installed bushing. The procedure consists in mechanical treatment of this worn out part of the platform and in adding a piece to form the above said blade.

Row of blades of straightening device driven with rotary ring of automatic centring, compressor equipped with said row of blades and gas-turbine motor containing this compressor / 2416724

Jacket contains stationary coaxial circular rail projecting from external surface of this jacket. Also, at least three movable parts spaced one from another in circumferential direction can travel along this rail. Each movable part is connected with the driven ring by means of a radial guiding structure. For each movable part the radial guiding structure contains an element in form of a rod installed in radial direction into an orifice made in the said ring. The rod-shaped element is secured on the movable part. Another invention of the group refers to a compressor equipped with at least one above said row of the blades of the straightening device with alternate angles of assembly. One more invention refers to the gas-turbine motor incorporating the said compressor.

Bush for blade hinge with adjustable mounting angle for turbomachine, ring of turbomachine with such bush, and also compressor of turbomachine and turbomachine with such ring / 2405941

Bush for blade hinge with adjustable mounting angle for turbomachine installed in hole of turbomachine ring represents tubular frame with longitudinal axis and comprises at least three ribs. Shape of hole in turbomachine ring matches shape of bush, and ribs protrude along radius outside relative to longitudinal axis of tubular frame, pass along axis by its full height and are evenly distributed along its peripheral surface. Each rib of bush is arranged in the form of tubular rib, having substantially oval cross section. Other invention of group relates to ring of turbomachine having multiple holes, every of which is intended for location of guide hinge of blade with adjustable mounting angle, and multiple above specified bushes. Another two inventions relate to compressor of turbomachine and turbomachine, comprising at least one above specified ring.

Turbojet engine crankcase sheathing and turbojet engine / 2398114

Turbojet engine crankcase sheathing comprises two coaxial shells arranged one inside the other and rigidly jointed together by radial jackets that accommodate crankcase radial ducts. Sheathing inner shell lower edge is secured on crankcase element and rests axially on the other crankcase element by its upper edge. Sheathing, in free state, features axial size smaller than axial distance between attachment points of lower edge of inner shell and points of axial support of case of outer shell upper edge, when it is secured on crankcase. Another invention of proposed set relates to turbojet engine comprising above described crankcase sheathing.

Line of flow-straightening grid vanes driven by rotary ring driven by electrical actuators, compressor incorporating said line of vanes and turbojet engine comprising such compressor / 2397331

Line of vanes with variable pitch comprises vanes arranged in casing and driven by their control system. Said control system comprises driving ring secured on said casing and articulated by levers with aforesaid vanes to set them moving simultaneously. Driving ring is simply revolved around turbojet engine axis. Control system comprises two coaxial parts, namely: inner part rigidly coupled with casing and outer part incorporating said driving ring coupled with aforesaid levers and directed to revolve about said inner part. At least one electrically driven unit is arranged between said inner and outer parts. Another invention of the set relates to compressor furnished with said row of vanes of straightening grid. One more invention relates to turbojet engine comprises aforesaid compressor.

Device to vary turbine nozzle guide vanes critical section, turbine nozzle guide vanes / 2396437

Proposed device comprises circular element. Nozzle guide vanes are arranged radially between circular outer and inner sites, spaced apart to constrict gaseous combustion product passage in turbine. Vanes are spaced apart to constrict critical section to make it minimum section. Circular element features coefficient of expansion less than that of guide vanes sites. Circular element is secured on outer site to stay in two positions: first position corresponding to site no-expansion state wherein it provides for continuous gas-air flow profile, and second position corresponding to site expansion state wherein it extends into gas-air flow to reduced its section. Another invention of the set relates to turbine nozzle guide vanes comprising above described device.

Gas turbine engine and its intermediate assembly / 2396436

Gas turbine engine comprises intermediate assembly 14 to be arranged axially between turbine 1^st and 2^nd assemblies. The latter can represent LP compressor and HP compressor or HP turbine and LP turbine. Said intermediate assembly comprises circular channel 5c running around central axial line 18 of intermediate assembly 14. Intermediate assembly serves to direct gas flow from gas channel in the 1^st assembly to that in the 2^nd assembly. Inlet 19 of said circular gas channel 5c of intermediate assembly is notably shifted radially relative to its outlet 20. Intermediate assembly circular gas channel 5c accommodates at least one guide element 28, 29 to direct gas flow. Said guide element features the shape of circular guide element and is located nearby curved section of the wall that forms circular gas channel.

Control device of alignment of synchronising control ring of rotating blades of gas turbine engine, number of blades of compressor stator, which includes such device, gas turbine engine including such device / 2395694

Control device of alignment of control ring of rotating blades of gas turbine engine relative to its longitudinal axis, in which the control ring envelopes the annular surface aligned in the axis of gas turbine engine, includes many shoes intended for being engaged with the above annular surface. Each rotating blade is connected to control ring by means of the locking dog the first end of which is fixed on the control ring by means of trunnion installed radially on the above ring, and its other end is installed on rotating pin of the blade. Each shoe is fixed on shoe holder; at that, each shoe holder is fixed under the control ring by means of connecting systems intended for being assembled above the ring. Each shoe holder includes mainly the tubular part passing in longitudinal direction from control ring towards its inner space with possibility of installing an additional tubular part of shoe in it. Also device has the screw intended for being screwed into additional tubular part of shoe for controlling the radial position of the shoe. Other inventions of the group relate to the number of compressor stator blades and gas turbine engine, which include the above described control device of alignment of control ring of rotary blades.

Turbo machine nozzle block of which is installed on combustion chamber with walls made from composite material / 2392447

Turbo machine includes annular combustion chamber with internal and external walls made from composite material with ceramic matrix, and nozzle assembly of high pressure turbine, which is rigidly attached to rear edge of combustion chamber. Nozzle assembly of high pressure turbine includes wings of guide blades, which are located between internal wall and external wall of annular channel of gas flows coming from combustion chamber through nozzle assembly. Rear edges of internal and external walls of combustion chamber are continued to rear edge of nozzle assembly and form internal wall and external wall of annular channel of gas flow though nozzle assembly. Wings of guide blades are made from composite material with ceramic matrix and attached by applying the method of brazing to walls of annular combustion chamber.

High-temperature gas turbine / 2386817

Proposed gas turbine incorporates first stage nozzle blades arranged telescopically in radial direction in nozzle box inner ring. Nozzle box inner ring outer surface is provided with nozzles or sets of nozzles with their inlet communicated with high pressure chamber and their outlet communicated with low pressure chamber. Nozzle outlet parts are directed towards cooled surface of nozzle blade lower shoulder. Nozzle inner surface is made shaped, while the number of nozzles or sets of nozzles equals that of the first stage nozzle blades.

Cylinder of medium pressure in steam turbine / 2414602

Cylinder of medium pressure in steam turbine consists of case with chamber, of steam inlet connected to cavity of lower pressure via separator, of guiding mechanism of first step with working blades arranged behind it with inter-rim gap, of ferrule of stator with radial packing positioned over band of working blades secured to guiding mechanism of first step. The ferrule forms a circular cavity with case of cylinder, while with diaphragm of second step it forms an open inter-step gap communicated with circular cavity. Separate circular chambers positioned opposite the inter-rim gap of the first step are made in the ferule, opposite to an inlet edge of the working blades band of this step and over pins of the working blades between the steps of radial packing. The separate circular chambers are communicated with the circular cavity of the case by means of drain channels beneath the ferrule. Outlet sections of the drain channels are arranged in the ferrule with set-off in a sequence corresponding to the position of the circular chambers in the ferrule. To external surface of the ferrule at a back end wall there is attached a circular screen separating a part of the circular cavity of the case with the outlet sections of the drain channels from the part of the circular cavity with an open gap between the first and the second step. Additional circular chambers located opposite to packing collars of the band of the first step blades can be made in the ferrule.

Blade of nozzle grid of wet-steam turbine / 2392451

Invention refers to turbine industry and can be used at the last stages of wet-steam turbines. Blade of nozzle grid of wet-steam turbine includes the wing with inlet and outlet edges, which is made in the form of convex and concave surfaces, as well as injected steam channel. Middle part of concave surface is covered with the covering plate so that the outlet slot of injected steam channel is formed on the outlet edge side. Injected steam channel is formed with the middle part of concave surface and the covering plate on the side of the wing inlet edge. Outlet slot of the channel is located relative to outlet edge of the wing at the distance equal to 0.1…0.4 of the distance between its inlet and outlet edges.

Moist-steam turbine / 2360132

Moist-steam turbine contains ring-shaped case forming steam inlet together with peripheral and central sections, correspondingly. There is a circular cowling in the central steam inlet section. Together with case, this cowling forms moisture intake channel, which is open from the side of peripheral steam inlet section. The moist-steam turbine contains also moisture collector made up from two grooves at different sides of moisture intake channel. The groove in the said case is made on the radial level exceeding the radial level of the groove made in the cowling. So the formed double-channel moisture collector is linked with steam inlet of moisture intake channel and with bleeding chamber located behind the case by means of holes made in the said case. The coarse moisture precipitates on the case in peripheral section of the steam inlet. Thus, the water film locating both from the upper and lower halves of the case is drawn into the moisture intake channel under the action of steam flow. After that the moisture gets into the moisture collector grooves and then, to bleeding chamber through the holes due to pressure drop. The disclosed by the invention structure of moist-steam turbine allows for collecting moisture from both upper and lower halves of steam inlet case.

Moist-steam turbine / 2360131

Moist-steam turbine contains wheel space linked with revolving section having steam bypass pipe. The inlet surface of revolving section is implemented as concentric profiled rings, while the outlet surface is represented as a screen. The inlet and outlet surfaces of revolving section are located so that to form annular channel. By means of the annular channel, the revolving section is connected to the moist steam bleeding chamber. The concentric and profiled rings form additional annular channel between each other. The said additional channel links the revolving section with the moist steam bleeding chamber. During quick turn of the moist steam flow in the area of revolving section, suspended and teardrop-shaped moist precipitates on the rings at high speed. The formed water film moves along the ring surfaces and is removed to the moist steam bleeding chamber though the annular channels together with some amount of steam.

Wet steam reaction turbine / 2307940

Proposed reaction turbine for wet steam has housing accommodating hollow rotor fitted on shaft and made in form of at least one disk with system of distributing channels, all communicating with space of rotor and connected on periphery with de Laval nozzles. Axes of de Laval nozzles are arranged tangentially. Rear walls of distributing channels are made in form of penetrable partitions separating distributing channels from condensate collecting chambers. Condensate collecting chambers communicate with ring chamber of disk with fitted-in condensate outlet pipes whose inlet holes are arranged square to direction of disk rotation. Pipes are connected with condensate outlet line.

Wet steam turbine / 2303705

Proposed wet steam turbine has stator casing with means to retain, let out and discharge of moisture. Wheels with blades are provided with moisture collecting grooves made on inner surface of shroud provided with ring projection. Seal, for instance, cellular-type one, is made on projection of shroud. Means to let out moisture from stator casing is made in form of slot with cross partition located between seal and projection of shroud.

Method to remote moisture from channels of guide vane assembly of wet-steam turbine stage / 2267617

Invention can be used for removing moisture from wet-steam turbine blading. According to proposed method, outer surfaces of guide vanes are heated to temperature exceeding saturation temperature of main flow of steam entering the stage by passing heating steam along inner spaces through inlet and outlet holes. Excess of guide vane surface temperature over saturation temperature of steam entering the stage is chosen to be lower by 10°C, minimum. Moreover, used as heating steam is wet steam, and section of outlet hole of guide vane inner space is chosen to be smaller than section of inlet hole basing on condition of full condensing of heating steam.

Cylinder high pressure wet steam turbine / 2215161

The invention relates to a wet-steam turbines with double-hulled design of the high pressure cylinder (HPC) with blagoslavlyaya device, and can be used, for example, in wet-steam turbines of various capacities for nuclear power plants, which is especially important for effective removal of the film of moisture

Stage steam turbine with means separation of moisture / 2126088

The invention relates to the production of steam turbines, mostly wet steam, and its object is the stage of the turbine with the means of moisture separation

Node overflow pipe with high-speed separator for a steam turbine / 2122641

The invention relates to the field of protobacteria, and its object is the node overflow pipe passing between the cylinders of a steam turbine and equipped with high-speed air dryer

Method to remote moisture from channels of guide vane assembly of wet-steam turbine stage / 2267617

FIELD: machine building.

SUBSTANCE: procedure for fabricating blade of guiding mechanism of stem turbine consists in connection of padding with blade body by means of contact weld and electron-beam weld. The padding is connected with the blade body by contact welding at the exit edge of the blade, while slit channels are arranged between sections of contact welding along the exit edge of the blade.

EFFECT: simplified fabrication of blade of guiding mechanism of steam turbine.

1 cl, 2 dwg

The invention relates to the field of engineering, in particular to the development of manufacturing technology of blades, guide vanes steam turbines.

On the surface of impeller blades and guide vanes during operation of the turbine for wet steam is the condensation of steam with the formation of water droplets. These drops fall with guide vanes, resulting in erosion of the turbine blades.

The number of active methods to protect the blades from erosion is used, in particular, the use of new designs of blades, guide vanes with internal separation based on removal of moisture, the current along the guide blades, made hollow, and the inner cavity of the blades are connected with their outer surface channels. Most of these blades are manufactured by casting, but this method of manufacture is quite complex.

A known method of manufacturing a blade of the guide vane of the steam turbine, including connection blades, consisting of a body blades and plates joined by welding, and adopted for the prototype (see the publication of the application US 2007 US/A from 18 January 2007).

A method of manufacturing a composite blade by welding, which consists in the fact that the pad connected to the body of the scapula using resistance spot welding and electron-l the U.S. welding, and off the edge of the shoulder strap connects to the body of the scapula contact welding, and slotted channels between areas of contact welding along the trailing edge of the blade.

The inventive method of manufacturing the blade of the guide vane of the steam turbine can reduce the erosion of the turbine parts without complication technology, to provide the required precision without additional mechanical processing.

To illustrate this approach, figure 1 shows the design of the vanes of the guide vane, and figure 2 - a section a-a figure 1. As can be seen from the drawings, the design consists of a body of the blade 1 and the lining 2. In the body of the vanes cavity 3 extending on one side to the edge of the blade. On the other three sides of the cavity are made of site 4, lying in the same plane, on which rests the plate 2 with its flat base. On one of the sites located along the trailing edge of the blade, before Assembly the blades are made slotted channels 5, which connects the cavity 3 with the outer surface of the scapula.

The plate 2 is connected with the body of the scapula resistance spot welding 6 and solid welds, electron beam welding 7.

The proposed method simplifies machining of the body of the scapula and pads due to the fact that the treated surfaces are flat, and the NEA is ka by using processes, giving a small deformation of the connected parts.

A method of manufacturing a blade of the guide vane of the steam turbine, including the connection pads with the body of the blade by welding, characterized in that the pad connected to the body of the scapula by means of contact welding and electron beam welding, and off the edge of the shoulder strap connects to the body of the scapula contact welding, and slotted channels between areas of contact welding along the trailing edge of the blade.