322results about "Combination engines" patented technology

A method of braking a rotational air mover portion of an aircraft propulsion system is provided. The method includes: using an electrical device to apply a torque to a propulsion unit driven by a propulsion system of an aircraft, the propulsion unit including a rotational air mover configured to provide thrust for propelling the aircraft, wherein the electrical device is configured to produce electrical energy during the process of applying the torque to the propulsion unit; controlling the electrical device to apply an amount of the torque that is sufficient to cause the rotational air mover to decelerate or to maintain the rotational air mover non-rotational; and directing the electrical energy produced by the electrical device to an aircraft component.

The invention relates to the technical field of peak regulation of power generation systems, in particular to a multi-mode power generation system for a new energy large base and an operation method of the multi-mode power generation system. The multi-mode power generation system comprises a thermal power station and a fused salt energy storage power station. The thermal power station comprises a boiler, a first turbine, a first water return unit and a first generator; the fused salt energy storage power station comprises a high-temperature fused salt tank, a low-temperature fused salt tank, a fused salt heating unit, a steam-water heating unit, a second water return unit, a second steam turbine and a second generator; an air inlet of the fused salt heating unit is configured to obtain steam flowing out of the boiler, and a second discharging opening of the fused salt heating unit is connected with the first water return unit; an air outlet of the steam-water heating unit is connected with the first steam turbine and the second steam turbine. The first water return unit and the second water return unit are connected with a second feeding port of the steam-water heating unit. The multi-mode power generation system can set different operation modes according to different requirements, so that the new energy large base can meet higher requirements.

The utility model provides a peak shaving system based on fused salt heat storage coupling nuclear power. The peak shaving system comprises a nuclear reaction steam unit, a first steam turbine, a first power generator, a second steam turbine, a second power generator, a fused salt heat storage assembly and a fused salt electric heater. The nuclear reaction steam unit provides steam for the first steam turbine, the first steam turbine drives the first power generator, and when the power generation load requirement is low, the fused salt heat storage assembly absorbs heat of part of steam generated by the nuclear reaction steam unit through low-temperature fused salt, converts the heat into medium-temperature fused salt and stores the medium-temperature fused salt; the molten salt electric heater reheats the medium-temperature molten salt to obtain high-temperature molten salt; surplus electric quantity is reasonably utilized to further increase the molten salt temperature, and waste of steam and electric quantity is avoided; when the power generation load demand is high, the high-temperature fused salt exchanges heat with part of return water discharged by the first steam turbine, and steam is obtained and provided for the second steam turbine; the change of peak and valley power utilization can be met, the generating capacity of the nuclear power unit can be flexibly adjusted, and energy waste is avoided.

Liquefied natural gas brings energy overriding and environmental disruption. However, the liquefied natural gas is a liquid dielectric medium, can be easily liquefied by pressurizing at room temperature, can be expanded by more than 250 times in volume during gasification, and is relatively high in dielectric constant and relatively low in voltage resistance. As a capacitor, such a liquid dielectric is considered; the energy of the liquid dielectric capacitor is consumed inside the capacitor for an engine, welding or buoyancy gas generation, or is consumed outside the capacitor for use as an on-board capacitor for a vehicle. [Solution] A liquid dielectric capacitor is considered as a dielectric breakdown induced igniter that can replace a conventional spark plug. In order to utilize the principle of such an igniter as an energy source for an engine, a welding device or a buoyancy bag for lifting a subsea resource, an electrical charge is applied to the liquid dielectric thin layer, and then the thickness of the liquid dielectric thin layer is made close to zero to cause dielectric breakdown, or the thickness of the liquid dielectric thin layer is increased to cause breakdown of the liquid dielectric thin layer. A high voltage source is established for a vehicle-mounted capacitor of the vehicle. Therefore, a world without environmental damage is realized.

An engine system for an aircraft includes a first turbofan engine and a second turbofan engine. The first turbofan engine includes a first low-pressure shaft, a first fan having a first fan shaft, and a counterclockwise gearbox assembly. The first fan shaft is drivingly coupled to the first low-pressure shaft through the counterclockwise gearbox assembly. The first low-pressure shaft rotates in a counterclockwise direction. The first fan shaft rotates in the counterclockwise direction such that the first fan rotates in the counterclockwise direction. The second turbofan engine includes a second low-pressure shaft, a second fan having a second fan shaft, and a clockwise gearbox assembly. The second fan shaft is drivingly coupled to the second low-pressure shaft through the clockwise gearbox assembly. The second low-pressure shaft rotates in the counterclockwise direction. The second fan shaft rotates in a clockwise direction such that the second fan rotates in the clockwise direction.

A gas supply system for a high-pressure gas consuming appliance and a low-pressure gas consuming appliance of a floating structure including a tank containing the gas is disclosed. The supply system includes: a first supply circuit and a second supply circuit; a gas return line; and a first heat exchanger and a second heat exchanger configured to carry out a heat exchange between the gas of the first supply circuit and the gas circulating in the return line. The first supply circuit includes an additional pump.

The embodiment of the invention provides a multi-stage expansion machine differential pressure power generation system which comprises N stages of expansion units and a power generation unit. Each stage of expansion unit comprises a free plunger expansion machine, a pressure relay and a three-position three-way electromagnetic valve, and the expansion units are used for outputting mechanical energy to the generator set in the process of performing expansion and pressure reduction on high-pressure gas; the gas inlet end of the first-stage free plunger expansion machine is connected with a high-pressure gas input end, the gas outlet end of the ith-stage free plunger expansion machine is connected with the ith pressure relay and the gas inlet end of the ith three-position three-way electromagnetic valve, and the gas inlet end of the (i + 1) th-stage free plunger expansion machine is connected with the first working end of the ith three-position three-way electromagnetic valve; second working ends of the N three-position three-way electromagnetic valves are connected with a low-pressure gas output end; the pressure relay is used for monitoring the gas pressure of the gas outlet end of each stage of free plunger expansion machine; the generator set is connected with the energy output end of each stage of free plunger expansion machine and used for converting mechanical energy output by the expansion set into electric energy.

The invention discloses a double-turbine power generation device suitable for a thermal power generating unit, relates to the technical field of thermal power generation, and mainly aims to improve the power generation efficiency of the thermal power generating unit. According to the main technical scheme, a boiler system is connected with steam inlet valves of a first steam turbine power generation sub-set and a second steam turbine power generation sub-set through pipelines, and corresponding steam is conveyed to the two sub-sets by adjusting the opening degree of a valve to be matched with a load distribution target. After the two subsets do work, part of steam is fed into a steam extraction heat regeneration system to recover heat and is used for heating boiler feed water; and the residual exhaust steam enters the condenser system to be condensed into water, and the condensed water is conveyed to the steam extraction heat regeneration system to be heated to become boiler feed water, so that circulating power generation is realized.

The cycloid rotor electronic pump (1) according to the invention allows an electric motor (9) to be integrated into the cycloid rotor electronic pump (1) by forming permanent magnets (7) on the outer circumference (6) of an external gear (2) which can be surrounded on the outside by a stator (10) in order to form the electric motor (9). As a result, an additional connection between the electric motor (9) and the cycloidal rotor electronic pump (1) can be omitted, such that axial installation space and cost are saved. At the same time, the external gear (2) and the internal gear (3) act as a transmission, via which additional elements (not shown here) can be driven via a drive shaft (11) connected to the internal gear (3) in a rotationally fixed manner.

The utility model discloses a two-stage screw expander. The two-stage screw expander comprises a first-stage screw expander, an interstage gear assembly, a second-stage screw expander and a regulating valve assembly, the first-stage screw expander is a high-pressure-stage screw expander, and the second-stage screw expander is a low-pressure-stage screw expander; the two-stage screw expander is provided with an air inlet and an air outlet; an inter-stage gear assembly is arranged between the first-stage screw expander and the second-stage screw expander, and the adjusting valve assembly is arranged on the second-stage screw expander and can conduct corresponding adjustment according to pressure changes of the air inlet and the air outlet. According to the two-stage screw expander, the optimal expansion ratio can be automatically adjusted according to changes of external working conditions, so that the screw expander can work efficiently at any time.

An air turbine and a power generation device, the air turbine comprising a chamber, a valve and a rotor. The chamber comprises a first opening communicating with the atmosphere; the air pressure in the chamber is adjustable, and the difference between the air pressure in the chamber and the atmospheric pressure comprises a first air pressure difference and a second air pressure difference; the valve is connected with the chamber and is configured to open under the action of the first air pressure difference to form a first air flow by the chamber communicating with the atmosphere through the valve and the first opening respectively, and to close under the action of the second air pressure difference to form a second air flow by the chamber communicating with the atmosphere through the first opening, the directions of the first air pressure difference and the second air pressure difference being opposite; the rotor is configured to rotate under the drive of the second air flow. The air turbine can be used for power generation to convert the kinetic energy of the rotor into electrical energy, for example, the first air pressure difference and the second air pressure difference are obtained by utilizing the fluctuation of waves, and ultimately the wave energy is converted into electrical energy.

The invention relates to a thermal power generating unit peak shaving system and method based on a steam heat accumulator. The thermal power generating unit peak shaving system comprises a steam turbine, a boiler conveying steam to the steam turbine and a water supply assembly conveying water to the boiler to form steam. The boiler comprises a main steam pipe and a reheat steam pipe; the water supply assembly comprises a water conveying assembly and a heating assembly, and the heating assembly is used for heating water conveyed in the water conveying assembly through steam extraction of the steam turbine; the peak regulation system of the thermal power generating unit further comprises a steam heat storage system, the steam heat storage system comprises a steam heat accumulator, the steam input end of the steam heat accumulator is connected with the main steam pipe, the steam output end of the steam heat accumulator is at least connected with the heating assembly, and the peak regulation system of the thermal power generating unit has the advantage of meeting rapid peak regulation of the unit.

The invention discloses a compressed air energy storage multi-stage expansion machine quick starting system and method. The compressed air energy storage multi-stage expansion machine quick starting system comprises multi-stage expansion machines which are sequentially connected in series and a main air inlet pipeline connected to the first-stage expansion machine. The main air inlet module is used for supplying and adjusting air flow to the multi-stage expansion machine in a normal operation mode; the last-stage priority starting module is used for converting a high-pressure gas source into low-pressure large-flow mixed gas flow suitable for being driven by the expansion machine in the initial starting stage, and the converted mixed gas flow bypasses the previous expansion machine and directly drives the last-stage expansion machine to rotate and accelerate; the multi-stage preheating module is used for guiding part of gas to carry out reverse-sequence preheating on the previous-stage expansion machines, reverse airflow serves as starting damping and is further used for assisting in stabilizing the rotating speed, the gas completing the preheating task is exhausted through an exhaust valve, speed increasing and reverse-sequence preheating are carried out in parallel, the starting time is greatly shortened, and the starting efficiency is improved. And the starting time of the unit from the cold state to the grid-connected condition is reduced to the minute level.

The invention relates to a thermal power generating unit peak shaving system and method based on steam energy storage, the thermal power generating unit peak shaving system comprises a steam turbine, a boiler and a water supply assembly, and the boiler comprises a main steam pipe and a reheat steam pipe; the water supply assembly comprises a water conveying assembly and a heating assembly; the thermal power generating unit peak shaving system further comprises a steam heat storage system. The steam heat storage system comprises a steam input assembly, a high-pressure steam heat accumulator and a low-pressure steam heat accumulator. The input end of the steam input assembly is at least connected with the output end of the main steam pipe, one output end of the steam input assembly is connected with the input end of the high-pressure steam heat accumulator, and the other output end of the steam input assembly is connected with the output end of the low-pressure steam heat accumulator; the output end of the high-pressure steam heat accumulator is connected with the heating assembly, the output end of the low-pressure steam heat accumulator is at least connected with the steam input end of the low-pressure cylinder, and the system has the advantages of being low in improvement cost, rapid in peak regulation response and wide in peak regulation range.

The invention provides a nuclear power peak shaving system coupled with heat pump energy storage. The nuclear power peak shaving system comprises a nuclear power unit, a heat pump unit and an overheating Rankine cycle unit. Wherein the nuclear power unit is provided with a first steam circulation path and uses saturated steam in the first steam circulation path to generate power, and the superheated Rankine cycle unit is provided with a second steam circulation path and uses superheated steam in the second steam circulation path to generate power; the heat pump unit comprises a compression device and an expansion device, a passage between the input end of the compression device and the output end of the expansion device is used for absorbing heat from the first steam circulation passage in a peak shaving state, and a passage between the output end of the compression device and the input end of the expansion device is used for releasing heat to the second steam circulation passage in a peak state. According to the nuclear power peak regulation system coupled with heat pump energy storage disclosed by the invention, the power of a reactor does not need to be changed in the peak regulation process of the nuclear power unit, so that the nuclear power unit can safely and stably participate in peak regulation and peak regulation of a power grid.

The invention relates to a multi-source cooperative steam turbine with all-working-condition efficiency reconstruction and a control method. The multi-source cooperative steam turbine comprises a multi-source cooperative steam turbine high-pressure cylinder, a multi-source cooperative steam turbine intermediate-pressure cylinder, a multi-source cooperative steam turbine intermediate-low pressure combined cylinder and a multi-source cooperative steam turbine low-pressure combined cylinder which are coaxially arranged. The gradient adaptive turbine is arranged on another shaft or coaxially arranged through a clutch, and a steam inlet of a gradient adaptive turbine cylinder is connected with a main steam output pipeline of the boiler and is provided with a gradient adaptive turbine main steam regulating valve; a steam exhaust port of the gradient adaptive turbine cylinder is divided into two paths, one path is connected to the downstream of the high-pressure regulating valve so as to lead to a steam inlet of a high-pressure cylinder of the multi-source cooperative steam turbine, the other path leads to a condenser and is provided with a gradient adaptive turbine ventilation valve, and a gradient adaptive turbine rotor is connected with a turbine generator. The steam turbine can effectively improve the circulating heat efficiency of the steam turbine under variable working conditions, and obviously improves the economy of partial load operation of a coal power unit under a novel electric power system.

The invention discloses a multi-energy complementary system based on compressed air energy storage and biomass energy, so that the advantages of the compressed air energy storage and the biomass energy are fully utilized, natural energy is utilized to the maximum extent by the system, and meanwhile, the problem that the energy utilization efficiency of a single system is low is solved. According to the technical scheme, the system comprises a compressed air energy storage unit used for conducting compressed air energy storage on input electric energy and releasing energy in compressed air through an expansion machine so as to conduct power generation and heat recovery; the biomass energy unit is used for utilizing synthesis gas generated by biomass gasification as fuel and providing electric power output and waste heat recovery through combustion; and the heat supply circulating unit is used for recovering waste heat generated by the compressed air energy storage unit and the biomass energy unit and conveying heat to an external heat user side.

The invention discloses a front-mounted steam turbine suitable for high exhaust steam pressure and a steam turbine system.The inner cylinder of the front-mounted steam turbine comprises a first inner cylinder body and a second inner cylinder body which are formed by a first interface passing through the axis, and the outer cylinder of the front-mounted steam turbine comprises a first outer cylinder body and a second outer cylinder body which are formed by a second interface perpendicular to the axis; the two sides of the cylinder walls of the first inner cylinder body and the second inner cylinder body are respectively sleeved and fixed through circular rings; annular skirt parts are respectively arranged on the inner wall surfaces of the first outer cylinder body and the second outer cylinder body and are respectively matched with the peripheral surface of the circular ring; the two annular skirt parts, the outer wall face of the inner cylinder and the inner wall face of the outer cylinder form a low-pressure cavity, and a pressure balance hole penetrating to the low-pressure cavity is formed in the cylinder wall of the outer cylinder and used for being communicated with a low-pressure area. On the basis of overall structure optimization, the bearing capacity of the outer cylinder can be effectively improved, a pressure isolation mechanism is established on the basis of the low-pressure cavity, the action range of high exhaust steam pressure is greatly reduced, and reliable technical guarantee is provided for improving the exhaust steam pressure of a unit.

An energy conversion and storage system, comprises a piston defining an enclosed volume. The piston has an inlet valve proximate a bottom of the piston and an outlet valve proximate a top of the piston. A guide having a vertical displacement is arranged so that the piston travels along the guide. The guide has a compressed gas outlet proximate a bottom of the guide and is arranged to move gas into the piston when the piston contacts the compressed gas outlet. The guide has a release valve operator disposed proximate a top of the guide and is arranged to open the outlet valve when the piston contacts the release valve operator. A source of compressed gas in communication with the compressed gas outlet. The system has means for converting motion of the piston along the guide into either (i) motion of another object or (ii) electric power.

The gas heat engine comprises an isobaric compressor (1), which is connected to the shaft of an isothermal compressor (2), and both compressors (1) and (2) are housed in a container (10). The shaft of the isothermal compressor (2) is connected on the other side through a thermal insulation coupling (8) to the shaft of a rotary isothermal engine (4) and a rotary isobaric engine (3), where both engines are housed in a container (10). The output from the isobaric compressor (1) in the container (10) is connected through a recuperator (7) and a regulator valve (6) to the isobaric engine (3) in a container (9), the output from which is connected to the input to the isothermal engine (4) in the container (9), and its output is connected via piping to the recuperator (7), with an input to the isothermal compressor (2) in the container (10), where its output is connected through a check valve (5) to the isobaric compressor (1) in the container (10).

The application discloses a kind of efficient supercritical carbon dioxide high temperature gas cooled reactor systems and its operating method, the system includes pre-cooler, main compressor, re-compressor, high temperature turbine, low temperature regenerator, high temperature regenerator, high temperature helium-supercritical carbon dioxide heat exchanger, low temperature helium-supercritical carbon dioxide heat exchanger and reactor.The application proposes the power generation system of two-stage split supercritical carbon dioxide cycle comprising high-temperature split re-compression cycle loop and low-temperature re-split reheat expansion cycle loop, by arranging high-temperature helium-supercritical carbon dioxide heat exchanger and low-temperature helium-supercritical carbon dioxide heat exchanger in power generation system, ensure the good matching of helium loop heat release temperature window and supercritical carbon dioxide power cycle loop heat absorption temperature window, realize the efficient cascade utilization of high-temperature gas cooled reactor helium loop large-span temperature interval heat.

The invention relates to the technical field of steam turbines, and discloses a steam turbine cylinder connecting device and a control method of the steam turbine cylinder connecting device.The steam turbine cylinder connecting device comprises an intermediate-pressure cylinder, a low-pressure cylinder, a first pipeline, a second pipeline and a third pipeline, the intermediate-pressure cylinder is used for being connected with a steam extraction system, and the first pipeline is provided with a first adjusting valve; the second pipeline is provided with a second adjusting valve, and the third pipeline is provided with a third adjusting valve. Wherein the first pipeline, the second pipeline and the third pipeline are respectively connected with the medium-pressure cylinder and the low-pressure cylinder. The steam cylinder connecting device enriches the steam exhaust mode of the medium-pressure cylinder and improves the stability and reliability of operation of the steam turbine.

A double bypass control extraction steam type hybrid heat exchange frequency modulation system, including a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensate pump, a lower-level low-pressure heater, a first bypass controller connected to the lower-level low-pressure heater through a main pipeline, an upper-level low-pressure heater, a second bypass controller connected to the upper-level low-pressure heater through a main pipeline, a deaerator, a high-pressure heater directly connected to the deaerator through a pipeline, and a reheater whose inlet is connected to the second bypass controller through a pipeline and to the high-pressure cylinder through a steam pipeline, and whose outlet is connected to the medium-pressure cylinder through a steam pipeline. The present invention can quickly respond to the frequency modulation requirements of the power grid to the load changes of the unit, avoid frequent switching of the steam inlet automatic regulating valve during turbine frequency modulation, operate stably and reliably, ensure safe operation of the turbine, significantly improve the life and flexibility of the unit, save energy significantly, and have a large frequency modulation range. It can be widely used in the field of flexible frequency modulation of power plants.

The present invention provides an air turbine system and an operation method, including a compressed air source, which is communicated with the inlet of a high-pressure air turbine through a high-pressure inlet pipe; a high-pressure supplementary air pipe communicated with the supplementary air inlet of the high-pressure air turbine and a medium-pressure supplementary air pipe communicated with the inlet of a medium-pressure air turbine are connected in parallel on the high-pressure inlet pipe; a high-pressure supplementary air valve is arranged on the high-pressure supplementary air pipe, and a medium-pressure supplementary air valve is arranged on the medium-pressure supplementary air pipe; a high-pressure on-off valve and a high-pressure regulating valve are arranged on the high-pressure inlet pipe; a medium-pressure inlet pipe communicated with the inlet of the medium-pressure air turbine and a low-pressure inlet pipe communicated with the inlet of a low-pressure air turbine are connected in parallel at the exhaust port of the high-pressure air turbine; a medium-pressure on-off valve and a medium-pressure regulating valve are arranged on the medium-pressure inlet pipe; a first low-pressure on-off valve, a low-pressure regulating valve and a second low-pressure on-off valve are arranged on the low-pressure inlet pipe; the exhaust port of the medium-pressure air turbine is communicated with the low-pressure inlet pipe through a medium-pressure exhaust pipe; the present invention controls the connection relationship of each air turbine to ensure that the total output power remains unchanged.

A rotor-stator assembly for a rotary engine, compressor or pump, includes a rotor arranged to rotate eccentrically in a stator chamber, the geometry of the rotor being configured to provide a first fluid seal at a region of maximum proximity between the outer peripheral surface of the rotor and the inner peripheral wall of the stator chamber. A second fluid seal is provided by means of a component rotating with the rotor, one end of which is permanently connected to the inner surface of the stator chamber by means of bearings and slides along the inner surface of the stator chamber, and the other end of which is accommodated in a radially movable manner in a receptacle of the rotor, the first and second fluid seals delimiting a first chamber portion and a second chamber portion of the stator chamber.

The invention discloses a power generation system and a power generation method integrating a fourth-generation nuclear reactor and fused salt energy storage, and the power generation system integrating the fourth-generation nuclear reactor and the fused salt energy storage comprises a fused salt energy storage system which comprises a circulating heat storage working medium which is fluoride fused salt; the nuclear energy side power generation system comprises a fourth-generation nuclear reactor, a first power generation device and a second power generation device, supercritical carbon dioxide serves as a heat absorption medium of the fourth-generation nuclear reactor and flows out of a main flow path and a branch flow path, the main flow path supplies the supercritical carbon dioxide into the first power generation device, and the branch flow path supplies the supercritical carbon dioxide into the second power generation device. And supercritical carbon dioxide is introduced into the fused salt energy storage system for heat exchange through the branch flow path. Therefore, the temperature upper limit of a traditional circulating medium can be broken through, the energy conversion efficiency is improved, and meanwhile under the condition that the nuclear energy side power generation system stops running, high-temperature heat stored by the fused salt energy storage system can still maintain running.

A turbo-compounded engine (100) includes a piston engine (116) connected to drive a propulsor (106). An outlet (132) of the piston engine (116) is operable to connect products of combustion from the piston engine (116) to pass over a turbine (122). The turbine (122) is connected to drive a turbine shaft (121) also providing rotation to the propulsor (106). An outlet (132) of the turbine (122) is connected into an exhaust duct (146) configured to exhaust the products of combustion. The exhaust duct (146) is provided with an exhaust duct outer wall (146) defining an exhaust chamber (161), and a further cooling air outer wall (144) is positioned outwardly of the exhaust duct (146). Struts (162) connect a cooling chamber (148) between the cooling air outer wall (146) and the exhaust duct outer wall (146) into a center bullet (160). The center bullet (160) has a downstream end (166) for directing the cooling air into the exhaust chamber (161) at a location upstream of a downstream end (166) of the exhaust duct (146) outer wall.

A high-power and efficient gas expander provided by the present invention includes: a first rotor shaft and a second rotor shaft connected coaxially, and multiple stages of moving blades are provided on both the first rotor shaft and the second rotor shaft; a first expansion cylinder is sleeved on the first rotor shaft, and an air inlet / outlet communicating with the outside is provided on the first expansion cylinder, and the first rotor shaft rotates in the first expansion cylinder to output work; a second expansion cylinder is sleeved on the second rotor shaft, and an air inlet / outlet communicating with the outside is provided on the second expansion cylinder, and the second rotor shaft rotates in the second expansion cylinder to output work; multiple stages of nozzle rings are provided in both the first expansion cylinder and the second expansion cylinder, and the nozzle rings and the moving blades are arranged alternately. The double-cylinder and single-shaft system structure of the present invention realizes multi-stage expansion, achieves a greater power output, has a large power density and a low unit power cost; the high-power output enables the rotational speed of the shaft system to directly meet the requirements of the grid frequency, eliminating the need for a gearbox to change the output rotational speed, reducing mechanical energy loss, and having a high energy conversion efficiency.

An aircraft engine assembly (100) includes an engine (12) having an engine shaft (14); an output shaft (16); a clutch (30; 230) in driving engagement between the engine shaft (14) and the output shaft (16). The clutch (30; 230) has a first component (34f; 230a) in driving engagement with the engine shaft (14) and a second component (30b; 230bi). The clutch (30; 230) is operable between first and second configurations. In the first configuration, the first component (34f; 230a) is rotatable relative to the second component (30b; 230bi) and the engine shaft (14) is rotatable relative to the output shaft (16). In the second configuration, the first and second components (34f, 30b; 230a, 230bi) are engaged with one another and the engine shaft (14) rotates with the output shaft (16). A mechanical lock (32; 232) is operable between first and second positions. In the first position, the mechanical lock (32; 232) is disengaged from the first component (34f; 230a). In the second position, the first and second components (34f, 30b; 230a, 230b1) are secured for joint rotation one relative to the other.

This invention provides a segmented cross-bridge steam seal, method, and steam turbine for reducing steam leakage, applicable to steam turbines. The steam turbine includes an intermediate-high pressure outer cylinder, an integral high pressure inner cylinder, an intermediate pressure inner cylinder, a segmented cross-bridge steam seal, and an intermediate-high pressure rotor. The integral high pressure inner cylinder and intermediate pressure inner cylinder are both located within the intermediate-high pressure outer cylinder, and the segmented cross-bridge steam seal is located between the integral high pressure inner cylinder and the intermediate pressure inner cylinder. The segmented cross-bridge steam seal has several cross-bridge steam seal outlet rectifier chambers, and the integral high pressure inner cylinder includes several high pressure cylinder extraction chambers. The several cross-bridge steam seal outlet rectifier chambers are respectively connected to the several high pressure cylinder extraction chambers. In this invention, the main steam leaking from the segmented cross-bridge steam seal enters the integral high pressure inner cylinder through the make-up steam chamber, realizing the reuse of the main steam leaking from the segmented cross-bridge steam seal. This solves the problems of large steam leakage from the cross-bridge steam seal, waste of heat energy in high-quality steam, and high overall heat consumption rate of the turbine.