Blade machine

FIELD: machine engineering.

SUBSTANCE: blade machine comprises an inner body, a radially restrictive flow channel of the machine. A heat-insulating layer applied to the outer side of the inner body wall is arranged around the inner body, which is represented by a coating (1) which comprises a base material (2). The material (2) comprises a microporous plastic selected from the group consisting of polyurethane, polyethylene, polyolefin, polyester, polypropylene, polytetrafluoroethylene, epoxy resin, elastomers, zeolites, and a mixture of these materials or inorganic materials.

EFFECT: creation of easily manufactured thermal insulation for the blade machine.

13 cl, 1 dwg



Same patents:

FIELD: machine building.

SUBSTANCE: gas channel for a gas turbine is formed by concentrical inner and outer casings, the latter encloses the former at a distance. The inner casing and the outer casing are interconnected by a variety of radial supporting poles. The inner casing, the outer casing and the radial supporting poles are fitted by heat resistant lining to be protected against waste gases. The linings of the supporting poles, outer casing and inner casing are divided into a variety of separate segments fixed on a supporting structure providing for free individual thermal expansion of separate segments. The supporting structure comprises a variety of mounting units at the outer and inner casings. The mounting units are fixed on the concentrical shell by the radial poles, and the mounting units of the respective segments are fixed by screws. Another invention of the group relates to a gas turbine comprising the said gas channel through which waste gases are removed.

EFFECT: group of inventions allows for simplified maintenance of the turbine gas channel and for reduced thermal stresses in it.

9 cl, 8 dwg

FIELD: machine building.

SUBSTANCE: compensator comprises a hollow element passing through internal and external casings. The hollow element is rigid and is fixed on the internal casing. A resilient plate is rigidly fixed on the outer surface of the hollow element on the external casing side and is fitted with a through hole for it in the central part. The resilient plate is a generatrix of the turbomachine flow section and along the perimeter is enclosed in a rim mounted in the cavity whose lower and side walls are formed by the surfaces of the external casing. On top the said cavity is closed by a cover fixed at the external casing. The rim can travel in the resilient plate plane.

EFFECT: invention allows for the reduction of weight and dimensions of a compensator, increases the range of shift displacements of casings in respect to each other along with keeping sufficient sealing level in the place of a movable joint.

2 dwg

FIELD: machine building.

SUBSTANCE: when mounting inner inserts of a turbine casing of a gas compressor unit, upper and lower inner inserts are installed into the turbine casing via a horizontal slot and a combustion chamber. Prior to mounting the lower insert is cut horizontally into the top part connected to the upper insert and the bottom part cut vertically as per symmetry axes into four fragments with further assembly. The horizontal cut of the lower insert is made above the clamp bands of the turbine casing, and the dimensions of the produced parts allow for the installation of the top part of the lower insert without the turbine casing clamp being demounted.

EFFECT: invention allows for the simplification of inner insert mounting beyond the factory and for the reduction of labour content.

4 dwg

FIELD: machine building.

SUBSTANCE: gas turbine plant exhaust stage diffuser comprises shell with flanges, casing around said shell and sound isolation arranged between shell and casing. Shell is composed of moving, telescopic parts with banking pins. Said casing is composed of resilient material, for example, "Atom" cloth secured at the shell.

EFFECT: reliable operation of diffuser, lower metal input.

3 dwg

FIELD: machine building.

SUBSTANCE: mounting of inner insert of turbine casing of gas-turbine unit implies installation of upper part of the inner insert in the turbine cover and the lower part of the inner insert - in the turbine casing. The lower part of the inner insert is cut into at least six unequal fragments. The fragments of the inner insert lower part are put into the turbine casing and attached to each other by preinstalled mounting components. The joints of the said fragments are welded to each other and then the mounting components are removed from the said fragments. The upper part of the inner insert is installed on its lower part with both parts being aligned in relation to each other by means of centring units.

EFFECT: invention allows for the decrease of labour content and improvement of mounting quality of inner insert of gas-turbine unit turbine casing.

4 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: helical structure comprises scroll with channel for working fluid to flow there inside, and heat-insulating structure. Heat-insulating structure is intended for structural element operating on working fluid heated to high temperature. Heat-insulating structure comprises fastening part, pressure plate, heat-insulating element and adjustment part. Fastening part extends radially from structural element outer wall. Mounting position of pressure plate may be adjusted relative to said fastening part. Plate is attached to said fastening part to form the space between pressure plate and outer wall. Heat-insulating element is arranged between outer wall and pressure plate. Adjustment part is arranged between outer wall and pressure plate to define the space between outer wall and pressure plate by retaining pressure plate ad a distance from outer surface of said wall.

EFFECT: heat insulation of turbine inlet or discharge pipe without dirtying working fluid.

6 cl, 5 dwg

FIELD: power engineering.

SUBSTANCE: steam turbine (11) comprises a rotor (14), an inner body (6) arranged around the rotor (14), and also an outer body arranged around the inner body (6). Around the area of the inner body (6) there is a sealing closed shell (1). The shell (1) comprises an inflow channel for supply of steam and an outlet channel for leakage of steam contained in the shell (1). The inflow channel (10) by fluid medium is connected with a circular channel (18).

EFFECT: possibility to avoid intolerable differences of temperatures in an inner body due to variation of temperature on an outer surface of an inner body by supply of a targeted flow of steam into the shell area, intolerably high stresses are prevented at screws of jointing lines and on the inner body.

7 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: system for levelling and sealing of turbine housing assembly includes assembly of the first housing, which includes at least one segment of the first housing, assembly of the second housing, which includes projection, slot formed with assembly of the first housing and made so that it corresponds to the projection passing from assembly of the second housing, at least one blocking device arranged in slot and connected at least to one surface at least of one segment of the first housing, and at least partially sealed surface of projection seal, and conical surface of slot, which is connected at least to some part at least of one blocking device.

EFFECT: reducing turbine down time and costs for tools and labour force.

10 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: 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.

EFFECT: ruling out of significant vibration strains in sheathing thanks to compensation of deviation between sheathing and crankcase thermal expansion.

6 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: gas turbine unit housing accommodates at least one unit's component, for example fan, compressor, combustion chamber or turbine, and comprises basic component that has double wall. Said basic component comprises first inner cylinder and second outer cylinder arranged about lengthwise geometrical axis aligned, primarily, with that of gas turbine unit. Said cylinders overlap radially to make a clearance between outer surface of said first inner cylinder and inner surface of second outer cylinder. Aforesaid basic component with double wall incorporates a set of plate-like spacers spaced apart radially between aforesaid first inner and second outer cylinders to couple them together. Said cylinders can have circular cross section and be aligned. Aforesaid spacers can be arranged both in lengthwise direction and along circumference. Aforesaid basic component can be produced by welding modules arranged abreast along their circumference which feature I-beam shape, wide I-beam and/or T-beam. Said modules can be produced by extrusion.

EFFECT: higher rigidity and/or reduced weight.

17 cl, 11 dwg

FIELD: engines and pumps.

SUBSTANCE: gas turbine engine comprises distributor segment revolution locking device arranged inside engine circular case and heat insulation sheet fitted between case inner wall and distributor segment outer wall. Revolution locking device comprises locking pin fitted simultaneously in recess made in distributor segment and in case seat. Heat insulation sheet includes lug resting on locking pin. Locking device comprises surface section arranged radially between said lug and said case inner wall to make the thrust at possible radial shift of said heat insulation sheet in operation of gas turbine engine. Another invention of this set relates to versions of locking pin used in this gas turbine engine. In compliance with one version, said locking pin comprises straight rod and heat with first side parallel with rod axis and surface section perpendicular to said first side arranged opposite said rod. In compliance with the other version, this pin includes extra lug perpendicular to straight rod axis. Note here that surface section perpendicular to first side is composed said lug.

EFFECT: lower case wear owing to ruled out contact with heat-protection sheet.

9 cl, 6 dwg

FIELD: process engineering.

SUBSTANCE: in repair of crankcase flange with bores for equipment fastening bots and made of unweldable materials a countersunk recess of made in said flange around the bore for bolt. Then, countersunk recess bottom is anodized to fit the washer therein and glued thereat by appropriate adhesive. Another invention of this set relates to crankcase of turbo machine such as aircraft turbojet or turboprop made of aluminium, steel or composite which includes the circular flange with bore for bolt. Circular flange is repaired as described above while said bore fits in countersunk recess whereto said washer is glued.

EFFECT: simplified repair.

10 cl, 4 dwg

FIELD: process engineering.

SUBSTANCE: production of the jacket of high-power turbine unit for public power generation systems comprises installation of turbine unit jacket. The latter comprises at least one front section, one mid section and one end section. Jacket production mould is modified to allow the change of rpm for turbine unit to be adapted to the other frequency of power generation system limited by the mould variations for making of the jacket mid section. In compliance with this invention claimed modifications simply turbine unit moulding at changeover to other standards and specs of the other power generation units.

EFFECT: lower production costs.

10 cl, 4 dwg

FIELD: machine building.

SUBSTANCE: low-pressure steam turbine (105) has exhaust branch pipe (115). Internal casing (125) is directly supported by beam web (131) of the foundation (130) by means of the carrying brackets (180). Due to this effect of pressure differences in excluded in the exhaust branch (115), and effect of temperature variations in the exhaust branch is reduced in comparison with location of the inside casing and rotor in the branch pipe. The shaft bearings can be located outside the exhaust branch pipe and are installed in the socle support (140) made directly in the foundation (130). The end inserted seal of the rotor can be secured in the support (140). The exhaust branch pipe (115) can have more simple design with lesser number of the structural supports, its manufacturing requires less time.

EFFECT: simplified maintenance as shaft bearings are not covered under the exhaust branch pipe (115), and ring inserted seals (166, 176) can be removed without removal of the large-scale section of the exhaust branch pipe.

10 cl, 8 dwg

FIELD: power engineering.

SUBSTANCE: support stand (430) for a steam turbine diaphragm comprises the main vertical part (435) with a bulge (447), which passes from the specified part (435) substantially perpendicular to it. The bulge comprises the first bulge, stretching from the upper end of the main vertical part (435), and the second bulge stretching from the area near the lower end of the main vertical part (435). The first bulge is at a certain distance from the second bulge. The first and second bulges are designed for coupling with an appropriate slot (450), made in the turbine diaphragm. In the bulges there is a hole (455), which passes via them vertically and is designed to place a fastening element (460), stretching via the first and second bulges (447) to ensure vertical attachment of the main vertical part (435) and specified bulges (447) to the turbine diaphragm.

EFFECT: reduced duration and cost of maintenance cycle, since it provides for possibility of access for extraction of a lower half (410) of the diaphragm for maintenance without rotor removal.

9 cl, 7 dwg

Radial expander // 2548998

FIELD: machine building.

SUBSTANCE: invention relates to a radial expander. The radial expander comprises at least one section of the radial expander located in a common casing. The radial expander section includes impeller blades and a variety of diaphragms. The impeller blades are combined into two or more stages between the bearings on the same shaft. The diaphragms are coupled in axial direction. Every diaphragm comprises a knuckle bend to connect the adjacent stages. Each of the knuckle bends is fitted by a nozzle blade and a return blade. Every section has a gas input and a gas output. The gas input is communicated with the suction hole of the common casing. The gas output is communicated with the outlet hole of the common casing.

EFFECT: invention is aimed at the increase of expander reliability.

4 dwg

FIELD: machine building.

SUBSTANCE: turbine stage comprises a rotor disk mounted inside a ring divided into sectors and held by the external casing. Every annular sector comprises a rear edge with an annular groove confined by the front circular stop member, the rear circular stop member and the bottom wall. The external casing comprises a circular protruding edge located in the said groove to fix the rear edge of the annular sector. The bottom wall of the annular sector's annular groove is shifted in the radial direction in respect to the circular protruding edge of the external casing and can form insulating heat space in-between. The bottom wall of the annular groove comprises units for radial setting on the circular protruding edge which are formed by two contact patch pieces protruding over the bottom wall of the annular groove. The other invention of the group refers to a turbomachine comprising the above turbine stage.

EFFECT: group of inventions allows for higher reliability of a turbine stage.

9 cl, 6 dwg

Axial gas turbine // 2547542

FIELD: machine building.

SUBSTANCE: axial gas turbine (GT) contains a rotor with alternating rows of air cooled rotor blades and heat protecting rotor screens, and a stator with alternating rows of air cooled guide vanes and heat protecting stator screens installed in the internal ring elements. The stator coaxially encloses the rotor from outside creating between them the hot gas flowing path such that rows of rotor blades and heat protecting screens of the stator and roes of the guide vanes and heat protecting screens of the rotor are located against each other, respectively. The guide vanes row and next rotor blades row below as per direction of the flow create the turbine stage. The rotor blades are equipped with end external platforms of the rotor blades. The external platforms of the rotor blades contain on their external surface a row of teeth in parallel with each other in the circular direction and located one after another in direction of the gas flow. The teeth are divided to primary and secondary teeth. The secondary teeth are located downstream the primary teeth. The primary teeth are located against the projection of the adjacent guide vanes of the turbine stage passing downwards along the flow, and secondary teeth are against the appropriate heat protecting screens of the stator.

EFFECT: increased cooling efficiency.

9 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: casing of an axial turbomachine compressor and method to manufacture the casing. The casing comprises a support (34), in whole, of cylindrical shape, made from composite material, a metal ring (36) adjoining the internal surface of the support (34) by cohesion, and an abradable material layer (22) adjoining the internal surface of the metal ring (36) by plasma spraying. The metal ring (36) is preferable to be produced from stainless steel and preferable to be perforated. The perforation provides for better cohesion of adhesive substance and allows for its degassing. The external surface of the metal ring (36) is preferable to be treated by sand blasting prior to cohesion. Its internal surface is also preferable to be treated by sand blasting prior to plasma spraying of the abradable material.

EFFECT: simplicity and efficiency of manufacturing such a casing providing for the reduction of the compressor weight.

24 cl, 5 dwg

FIELD: power engineering.

SUBSTANCE: gas turbine ring fastening device enclosing the moving blades impelled by a gas flow has inlet and outlet hooks. The inlet hook faces towards the turbine inlet and is located in the inlet groove of the ring open downstream. The outlet hook faces towards outlet exit and is located in the output groove of the ring open upstream. Between the inlet and outlet hooks a positive pressure cavity is located which is fed by cooling gas. Upstream the inlet hook the cooling gas supply devices for cooling of the inlet hook are located, and downstream the output hook - the cooling gas supply devices for cooling of the outlet hook are located. The cooling gas supply devices are designed with a possibility of cooling gas supply without passing through the named positive pressure cavity. One more invention of the group relates to the assembly consisting of the named above device and the turbine ring containing the inlet groove open downstream and the outlet groove open upstream. Inlet and/or outlet grooves have a curved contact surface for contact with the respective hook. Other inventions of the group relate to the turbine comprising the named above fastening device or the named assembly and also to the turbomotor comprising such turbine.

EFFECT: group of inventions allows to provide the constancy of the form of hooks irrespective of the turbine operating mode, and also to improve their reliability.

8 cl, 6 dwg

FIELD: power engineering.

SUBSTANCE: invention relates to power engineering. A plant for determination of efficiency factor of a steam turbine section, which includes a physical computing device with a material machine readable information medium containing a code. The specified code is designed for determination of the efficiency factor of the steam turbine section based on the dependence between values of enthalpy difference and values of steam leak flow between adjacent sections of the steam turbine. The specified dependence comprises a point, in which leak enthalpy is compared to enthalpy in the place, where the leak is going. Also a plant is presented for determination of true efficiency factor of the medium pressure section of the steam turbine, as well as a plant for steam turbine control.

EFFECT: invention makes it possible to measure efficiency factor and leaks in a steam turbine.

19 cl, 8 dwg