Device for balance of rotor axial pressure of turbomachine

FIELD: machine industry.

SUBSTANCE: device for balancing the axial pressure of the rotor of the turbomachine comprises a hollow body and a disk disk mounted in the body with a central shaft and dividing the body into two cavities with channels for supply and discharge of compressed air to each hollow. One end of the shaft is provided with a central threaded socket, and both ends of the shaft – with external splined flanges. Disk piston is installed in the body on roller bearings and is provided with seals on the supports and the outer diameter of the piston. In the hollows of the device there are annular water heat exchangers with the supply and discharge of water. Displacement sensor is mounted on the body of the device with the ability to control the axial position of the piston and is electrically connected to the control unit. Axial pressure created on the piston is transferred to the rotor of the turbomachine. Rotating disk piston heats the compressed air around it due to frictional forces. Heated air transfers heat to water heat exchangers, which reduces the temperature of the device.

EFFECT: invention is aimed at increasing the heat removal from the disk piston and the hollow body of the balancing device.

4 cl, 2 dwg

 



 

Same patents:

FIELD: machine building.

SUBSTANCE: steam turbine power plant comprises a high-pressure turbine (104), a medium-pressure turbine (106) and three low-pressure turbines. The three low-pressure turbines comrpise two LP turbines (108) forming a double-flow LP turbine (108) and one single-flow LP turbine (110). The HP turbine (104) and the MP turbine (106) are made so that each of them essentially balances the axial force of the other. The double-flow LP turbine (108) is also balanced as per axial force. A steam extraction unit supplies HP steam from the HP turbine (104) to the cavity under the single-flow LP turbine (110). The said cavity in the direction to the single-flow LP turbine is essentially limited by a fixed structure surrounding a shaft (102). The plant comprises a thrust piston (128) connected to the shaft (102) and in the direction from the single-flow LP turbine the said cavity is essentially limited by the said piston (128). The thrust piston (128) can counteract the axial force produced by the single-flow LP turbine (110) in the course of operation.

EFFECT: invention allows for the reduction of costs on production and maintenance, and for increased efficiency due to the usage of thrust piston with smaller surface area and supply of HP steam to it.

14 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: insert (10) and the method of adjustment of steam balance through-hole (54) in a wheel (52) of steam turbine rotor are proposed. The insert (10) includes a housing (12) with have longitudinal axle (14) and oppositely located first and second ends (16, 18). Insert flange (20) is oriented in radial direction from the second end (18) of the housing (12). The exterior surface (22) is located along the housing (12) periphery between the named first end (16) and the flange (20). The first bore (24), made in the body (12), forms the first opening (28) in the first end (16), while the named first channel (24) and exterior surface (22) of the housing (12) together confine among themselves the wall (32), capable of being plastically deformed in a radially outward direction. The second bore (26), made in the housing (12), communicates with the named first bore (24) and has a smaller cross-section, than the first bore (24). The installation method entails the installation of the insert (10) in the through-hole (54) and expansion of the wall (32) to clamp the axial thickness of the wheel (52) between the flange (20) and expanded wall (32) of the insert (10).

EFFECT: simple installation of the insert is achieved, which can be executed by one employee without modifying of the wheel, the risk of strain of adjoining wheels is eliminated during the installation.

7 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: rotary machine, and namely a turbine, a pump or a compressor. Rotor (6) includes levelling piston (10) for action on axial shift of the rotor. Levelling piston (10) has changes (21, 22, 23, 24) of rotor (6) diameter. The first (31), the second (32) and the third (33) shaft seals on levelling piston (10) are installed between them, which seal the first (11), the second (12), the third (13) and the fourth (14) discharge chambers respectively with their pressure in each chamber. The first change (21) of the diameter is subject to pressure of the first discharge chamber (11), the second change (22) is subject to pressure of the second chamber (12), the third change (23) is subject to pressure of the third chamber (13), and the fourth change (24) of the diameter is subject to pressure of the fourth chamber (14). The first (11) and the third discharge chambers (13) are connected by means of the first discharge channel (71) to the first pressure level in the section of the coming-down flow of the rotary machine. Pressure in the first (11) and the third (13) discharge chambers is the same. The second (12) and the fourth (14) discharge chambers are connected by means of the second discharge channel (72) to the second pressure level at blade grid (4) of rotary machine (1) so that pressures in the second (12) and the fourth (14) discharge chambers are the same.

EFFECT: reduction of installation space owing to reducing the levelling piston diameter without any reduction of displacement compensation potential.

6 cl, 5 dwg

FIELD: power engineering.

SUBSTANCE: device for extraction of energy from a compressed gas flow comprises an expansion turbine, having an expansion turbine impeller, and a generator comprising a rotor and a stator. A radial inlet flow arrives into an expansion turbine impeller. The generator comprises a rotor and a stator. The rotor is rotated by the expansion turbine impeller. The external surface of the stator comprises cooling ribs. The expansion turbine and the rotor are installed in the pipe section. The face side of the expansion turbine impeller faces the generator. In the device there is an unlimited passage for an expanded gas flow providing for communication by means of a gas flow between a face side of the expansion turbine impeller and the external surface of the stator. Such multiple devices may be arranged in series. The distribution pipeline of natural gas comprises the specified device.

EFFECT: improved heat removal from a generator without necessity in external cooling.

15 cl, 3 dwg

Turbocharger // 2456482

FIELD: machine building.

SUBSTANCE: turbocharger comprises a housing and a rotor. The rotor includes the coaxial shaft and pipe shell, rigidly fastened to each other by at least two plates of uniform thickness equidistant from each other and oriented along the longitudinal axis of the rotor. The length of plates corresponds to the length of a pipe shell. End portions of the rotor are fixed to the gas-static bearings of the housing. The butt of the rotor, placed on the side of the housing, to which the longitudinal reaction force is directed, is tightly shut and forms a gas chamber together with the corresponding section of the housing, communicating with the discharge cavity of the compressor. The first gap formed by the surface of the bearing and the facing rotor surface, is isolated from the gas chamber by the seal, placed at the end portion of the rotor, and is directly connected with the discharge cavity of the compressor with a pressure required to unload the rotor of an axial force. The first gap opens into the first gas-collection ring, which is connected with the compressor suction cavity by a channel. The second gap formed by the surface of the second bearing and the surface of the rotor chamber, is isolated from the compressor discharge cavity with a seal placed between the last stage of the compressor and the facing side of the second bearing, and is directly linked to the release of the compressor. The second gap opens into the second gas-collection ring, communicated with the suction cavity of the compressor.

EFFECT: increased allowable peripheral velocity, axial and radial stiffness of the rotor, ensuring minimal weight and simplification of the manufacturing technology.

2 dwg

Steam turbine // 2410545

FIELD: engines and pumps.

SUBSTANCE: steam turbine with casing (2, 3), note that inside the casing (2, 3) there installed is a shaft (5) with the possibility of rotation that contains shift compensating piston (4) and directed along rotation (6) axis, between the casing (2, 3) and shaft (5) there performed is flowing channel (9). Inside the shaft (5) there is cooling line (17) for supply of steam coolant in the direction of rotation (6) axis. Cooling (17) line is connected, on the one hand, to, at least, one supply (16) line for steam coolant supply from flowing channel (9) into cooling line (17) and, on the other hand, to, at least, one outlet line (18) for steam coolant discharge to the side surface (19) of shift compensating piston (4). It features that it contains return line (21) for return of mixed steam that consists of steam coolant coming from outlet line (18) and part of working steam that passes in a form of a leak between casing (2, 3) and shaft (5) towards shift compensating piston (4). Note that return line (21) begins in working steam input area (10) and outlet line (18) output and falls into flowing channel (9).

EFFECT: increase of cooling efficiency of steam turbine thermal loaded areas that allows to use steam of higher temperature.

FIELD: engines and pumps.

SUBSTANCE: invention relates to steam turbine and to method of its operation. The turbine comprises and outer and inner casings, each with a live steam feed channel. The turbine incorporates a rotor with the thrust compensation piston, the rotor comprising multiple vanes and being arranged inside the aforesaid inner casing to run therein. Note the said inner casing incorporates multiple guide vanes arranged to form, along the flow direction, a flow passage with several vane stages, each comprising a row of operating vanes and a row of guide vanes. Note also that the inner casing has a return channel representing a connection pipe arranged in the space between the inner and outer casings and the said flow passage downstream of the vane stage, and that the inner channel incorporates a feed channel representing a connection pipe in the space between the inner and outer casings and the thrust compensation piston rod end.

EFFECT: higher efficiency of steam turbine cooling in wide temperature range.

16 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to steam turbine and to method of its operation. The turbine comprises and outer and inner casings, each with a live steam feed channel. The turbine incorporates a rotor with the thrust compensation piston, the rotor comprising multiple vanes and being arranged inside the aforesaid inner casing to run therein. Note the said inner casing incorporates multiple guide vanes arranged to form, along the flow direction, a flow passage with several vane stages, each comprising a row of operating vanes and a row of guide vanes. Note also that the inner casing has a return channel representing a connection pipe arranged in the space between the inner and outer casings and the said flow passage downstream of the vane stage, and that the inner channel incorporates a feed channel representing a connection pipe in the space between the inner and outer casings and the thrust compensation piston rod end.

EFFECT: higher efficiency of steam turbine cooling in wide temperature range.

16 cl, 2 dwg

Steam turbine // 2410545

FIELD: engines and pumps.

SUBSTANCE: steam turbine with casing (2, 3), note that inside the casing (2, 3) there installed is a shaft (5) with the possibility of rotation that contains shift compensating piston (4) and directed along rotation (6) axis, between the casing (2, 3) and shaft (5) there performed is flowing channel (9). Inside the shaft (5) there is cooling line (17) for supply of steam coolant in the direction of rotation (6) axis. Cooling (17) line is connected, on the one hand, to, at least, one supply (16) line for steam coolant supply from flowing channel (9) into cooling line (17) and, on the other hand, to, at least, one outlet line (18) for steam coolant discharge to the side surface (19) of shift compensating piston (4). It features that it contains return line (21) for return of mixed steam that consists of steam coolant coming from outlet line (18) and part of working steam that passes in a form of a leak between casing (2, 3) and shaft (5) towards shift compensating piston (4). Note that return line (21) begins in working steam input area (10) and outlet line (18) output and falls into flowing channel (9).

EFFECT: increase of cooling efficiency of steam turbine thermal loaded areas that allows to use steam of higher temperature.

Turbocharger // 2456482

FIELD: machine building.

SUBSTANCE: turbocharger comprises a housing and a rotor. The rotor includes the coaxial shaft and pipe shell, rigidly fastened to each other by at least two plates of uniform thickness equidistant from each other and oriented along the longitudinal axis of the rotor. The length of plates corresponds to the length of a pipe shell. End portions of the rotor are fixed to the gas-static bearings of the housing. The butt of the rotor, placed on the side of the housing, to which the longitudinal reaction force is directed, is tightly shut and forms a gas chamber together with the corresponding section of the housing, communicating with the discharge cavity of the compressor. The first gap formed by the surface of the bearing and the facing rotor surface, is isolated from the gas chamber by the seal, placed at the end portion of the rotor, and is directly connected with the discharge cavity of the compressor with a pressure required to unload the rotor of an axial force. The first gap opens into the first gas-collection ring, which is connected with the compressor suction cavity by a channel. The second gap formed by the surface of the second bearing and the surface of the rotor chamber, is isolated from the compressor discharge cavity with a seal placed between the last stage of the compressor and the facing side of the second bearing, and is directly linked to the release of the compressor. The second gap opens into the second gas-collection ring, communicated with the suction cavity of the compressor.

EFFECT: increased allowable peripheral velocity, axial and radial stiffness of the rotor, ensuring minimal weight and simplification of the manufacturing technology.

2 dwg

FIELD: power engineering.

SUBSTANCE: device for extraction of energy from a compressed gas flow comprises an expansion turbine, having an expansion turbine impeller, and a generator comprising a rotor and a stator. A radial inlet flow arrives into an expansion turbine impeller. The generator comprises a rotor and a stator. The rotor is rotated by the expansion turbine impeller. The external surface of the stator comprises cooling ribs. The expansion turbine and the rotor are installed in the pipe section. The face side of the expansion turbine impeller faces the generator. In the device there is an unlimited passage for an expanded gas flow providing for communication by means of a gas flow between a face side of the expansion turbine impeller and the external surface of the stator. Such multiple devices may be arranged in series. The distribution pipeline of natural gas comprises the specified device.

EFFECT: improved heat removal from a generator without necessity in external cooling.

15 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: rotary machine, and namely a turbine, a pump or a compressor. Rotor (6) includes levelling piston (10) for action on axial shift of the rotor. Levelling piston (10) has changes (21, 22, 23, 24) of rotor (6) diameter. The first (31), the second (32) and the third (33) shaft seals on levelling piston (10) are installed between them, which seal the first (11), the second (12), the third (13) and the fourth (14) discharge chambers respectively with their pressure in each chamber. The first change (21) of the diameter is subject to pressure of the first discharge chamber (11), the second change (22) is subject to pressure of the second chamber (12), the third change (23) is subject to pressure of the third chamber (13), and the fourth change (24) of the diameter is subject to pressure of the fourth chamber (14). The first (11) and the third discharge chambers (13) are connected by means of the first discharge channel (71) to the first pressure level in the section of the coming-down flow of the rotary machine. Pressure in the first (11) and the third (13) discharge chambers is the same. The second (12) and the fourth (14) discharge chambers are connected by means of the second discharge channel (72) to the second pressure level at blade grid (4) of rotary machine (1) so that pressures in the second (12) and the fourth (14) discharge chambers are the same.

EFFECT: reduction of installation space owing to reducing the levelling piston diameter without any reduction of displacement compensation potential.

6 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: insert (10) and the method of adjustment of steam balance through-hole (54) in a wheel (52) of steam turbine rotor are proposed. The insert (10) includes a housing (12) with have longitudinal axle (14) and oppositely located first and second ends (16, 18). Insert flange (20) is oriented in radial direction from the second end (18) of the housing (12). The exterior surface (22) is located along the housing (12) periphery between the named first end (16) and the flange (20). The first bore (24), made in the body (12), forms the first opening (28) in the first end (16), while the named first channel (24) and exterior surface (22) of the housing (12) together confine among themselves the wall (32), capable of being plastically deformed in a radially outward direction. The second bore (26), made in the housing (12), communicates with the named first bore (24) and has a smaller cross-section, than the first bore (24). The installation method entails the installation of the insert (10) in the through-hole (54) and expansion of the wall (32) to clamp the axial thickness of the wheel (52) between the flange (20) and expanded wall (32) of the insert (10).

EFFECT: simple installation of the insert is achieved, which can be executed by one employee without modifying of the wheel, the risk of strain of adjoining wheels is eliminated during the installation.

7 cl, 5 dwg

FIELD: machine building.

SUBSTANCE: steam turbine power plant comprises a high-pressure turbine (104), a medium-pressure turbine (106) and three low-pressure turbines. The three low-pressure turbines comrpise two LP turbines (108) forming a double-flow LP turbine (108) and one single-flow LP turbine (110). The HP turbine (104) and the MP turbine (106) are made so that each of them essentially balances the axial force of the other. The double-flow LP turbine (108) is also balanced as per axial force. A steam extraction unit supplies HP steam from the HP turbine (104) to the cavity under the single-flow LP turbine (110). The said cavity in the direction to the single-flow LP turbine is essentially limited by a fixed structure surrounding a shaft (102). The plant comprises a thrust piston (128) connected to the shaft (102) and in the direction from the single-flow LP turbine the said cavity is essentially limited by the said piston (128). The thrust piston (128) can counteract the axial force produced by the single-flow LP turbine (110) in the course of operation.

EFFECT: invention allows for the reduction of costs on production and maintenance, and for increased efficiency due to the usage of thrust piston with smaller surface area and supply of HP steam to it.

14 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: invention relates to an operating method for a rotary machine with bearing (39) where rotor (14) is installed, which in certain moment of operation is exposed to thrust force effect, which affects, mainly, only in axial direction and is perceived and withdrawn by first thrust bearing (43) of bearing (39) through a lubricant, herewith bearing (39) contains second thrust bearing (45). To damp or even prevent axial oscillations of rotor (4) it is proposed that in case of thrust force appearing at the same time second thrust bearing (45) at least periodically creates a force acting on first thrust bearing (43) in the direction of thrust.

EFFECT: proposed is a rotary machine operating method.

12 cl, 4 dwg

FIELD: machine industry.

SUBSTANCE: device for balancing the axial pressure of the rotor of the turbomachine comprises a hollow body and a disk disk mounted in the body with a central shaft and dividing the body into two cavities with channels for supply and discharge of compressed air to each hollow. One end of the shaft is provided with a central threaded socket, and both ends of the shaft – with external splined flanges. Disk piston is installed in the body on roller bearings and is provided with seals on the supports and the outer diameter of the piston. In the hollows of the device there are annular water heat exchangers with the supply and discharge of water. Displacement sensor is mounted on the body of the device with the ability to control the axial position of the piston and is electrically connected to the control unit. Axial pressure created on the piston is transferred to the rotor of the turbomachine. Rotating disk piston heats the compressed air around it due to frictional forces. Heated air transfers heat to water heat exchangers, which reduces the temperature of the device.

EFFECT: invention is aimed at increasing the heat removal from the disk piston and the hollow body of the balancing device.

4 cl, 2 dwg

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