482 results about "Steam turbine" patented technology

This invention belongs to the field of steam turbine control technology, specifically relating to a test control method for the main steam valve of a steam turbine based on single-valve control. The main steam valve test can be paused (Hold): Manual Hold: The operator triggers the Hold signal via the HOLD button in the DEH system platform's operation flowchart. The active-side regulating valve continuously captures the current opening as the current output value, remaining unchanged. The passive-side valve stabilizes power by adjusting its opening, thus pausing the main steam valve test. Automatic Hold: Under the regulating valve test window, if a disturbance occurs in the power grid, causing a sudden change in the actual power value, the HOLD signal is automatically triggered when the difference between the actual power value and the set value exceeds a threshold, based on the unit's regulating capacity. Main Steam Valve Test Cancel: The operator triggers the function via the Go button on the manual controller in the DEH system platform's operation flowchart, releasing the manual or automatic Hold state and resuming the main steam valve test. This invention enables the pause and continuation of the main steam valve test, achieving control over the progress of the main steam valve test status.

This invention proposes a method and system for improving the power generation efficiency of steam turbines, relating to the field of gas-fired power generation technology in steel plants. The method includes: obtaining and purifying high-temperature flushing water from the blast furnace flushing process; using the purified high-temperature flushing water to heat a circulating medium; introducing the heated circulating medium into a thermal storage station to mitigate the intermittency and fluctuations of the waste heat from the flushing water; using the heated circulating medium from the thermal storage station to heat condensate; the cooled circulating medium after heat exchange entering a cold storage station; exchanging heat between the cooled circulating medium from the cold storage station and the purified high-temperature flushing water to form a closed-loop circulation of the circulating medium; and sending the heated condensate, after further multi-stage heating, into a boiler to generate steam to drive the steam turbine for power generation. The method and system proposed in this invention can effectively utilize the waste heat from the blast furnace flushing water, thereby improving overall efficiency.

The present application relates to the field of high-speed spraying technology, in particular to a supersonic flame spraying process for steam turbine blades. The present application overcomes the problems of insufficient coating bonding strength and poor corrosion resistance of the supersonic flame spraying. The present application uses nickel-coated alumina composite sand for sandblasting pretreatment of the blades to achieve micro-implantation of active nickel; adjusts the ratio of NiCr and Cr3C2-NiCr powders by using double powder feeders to build a gradient structure coating with continuous component change; uses a modified sealing agent containing nano-alumina for vacuum impregnation sealing; and finally obtains finished blades through graded vacuum diffusion annealing. Through surface nickel implantation, gradient structure design and diffusion annealing, the present application realizes metallurgical bonding and thermal stress matching between the coating and the substrate, greatly improving the bonding strength; at the same time, the in-situ ceramicization reaction of the sealing agent eliminates micro-pores, significantly enhancing the corrosion resistance of the coating.

The application discloses a coal-fired power plant water-heat-chemical value-added system for a new power system and an intelligent flexible operation method thereof. The system comprises a coal-fired generator unit, a heat-steam-power coupling subsystem, a water-hydrogen-oxygen coupling subsystem and a carbon-chemical coupling subsystem integrated with the coal-fired generator unit, and is uniformly coordinated by an intelligent collaborative control unit. Solid particle storage flue gas waste heat can be used to quickly produce steam injection into a steam turbine to improve the frequency modulation response speed of the unit. Low-valley electricity is used to electrolyze hydrogen, and by-product oxygen is recycled. Hydrogen and captured carbon dioxide are used to synthesize green methanol to realize carbon resource utilization. Methanol synthesis reaction heat and electrolysis waste heat are recovered in stages. The operation method can intelligently switch and cooperate between fast frequency modulation, hydrogen production by electrolysis and methanol synthesis according to grid instructions and real-time electricity prices, so that the flexibility of the unit, resource utilization and comprehensive benefits are systematically improved.

The utility model discloses steam turbine high pressure cylinder and medium pressure cylinder shaft seal body outer cylinder body spraying heat insulation material heat preservation structure, including base layer, main heat insulation layer, transition layer, ceramic fiber suture line layer, anchor nail, heat reflection layer, ceramic fiber reinforced layer and protective surface layer. Base layer adopts nanometer silane interface agent to spray on the surface of cylinder body, and main heat insulation layer is nanocrystalline composite heat insulation material, and transition layer is composed of metal base layer, ceramic base layer and organic composite base layer, and the multiple suture lines of ceramic fiber suture line layer are orthogonal grid inlay in the surface of main heat insulation layer, and anchor nail top is equipped with barb structure and root installs elastic silicone rubber gasket, and heat reflection layer is the aluminum foil that etches nanometer level groove and is equipped with wave embossing, and ceramic fiber reinforced layer is sealedly installed paraffin, and protective surface layer adopts organic silicon modified acrylic resin material. The structure has solved the problems of easy cracking of heat insulation layer, easy breaking of heat preservation material, unreasonable shaft seal heat preservation and oil touch flammable etc, and has improved heat preservation performance, structural stability and safety.

This utility model relates to the field of waste heat power generation steam turbine technology, specifically a waste heat power generation steam turbine with a protection mechanism. It includes a high-pressure cylinder, a low-pressure cylinder, a dehumidification component, and a preheating component. An air inlet pipe is provided on the side of the high-pressure cylinder. A main steam pipe connects the upper ends of the high-pressure and low-pressure cylinders. The dehumidification component is connected to the outer end of the air inlet pipe. The preheating component is installed outside the main steam pipe. The dehumidification component includes a separation tank with an air inlet and an external interface at both ends. A guide tube is provided inside the separation tank, and centrifugal blades are provided on the outer wall of the guide tube. A connection port is provided on the other side of the guide tube and is connected to the air inlet. The inner side of the air inlet is connected to the air inlet pipe. This design enables effective separation of moisture from the steam, ensuring stable steam humidity and preventing condensate from impacting pipe bends or turbine blades in the high-speed steam flow, thus improving the service life of the equipment.

A cable outlet device for preventing oil leakage in turbine bearing housings belongs to the field of turbine technology. The device includes a bearing housing body, a lead wire connector seat, an outlet sleeve, and a lead wire connector. The lead wire connector seat is threaded to the bearing housing body and equipped with a copper gasket. The outlet sleeve is threaded to the lead wire connector seat and has a downward-facing lead wire window on only one side. The lead wire connector is threaded to the lead wire connector seat and equipped with an oil-resistant gasket. The other end is connected to a cable protection corrugated pipe. This invention reduces the risk of oil leakage through multi-layer sealing with copper and oil-resistant gaskets and a downward-facing lead wire window, utilizing the synergistic effect of gravity and sealing materials. Multiple cables can be led out simultaneously, reducing the amount of machining required for the bearing housing. The modular design facilitates disassembly and assembly, and the centralized cable outlet improves aesthetics. It is suitable for cable outlet scenarios in various turbine bearing housings.

The application relates to the field of steam turbine blade processing technology and discloses a coal-fired unit steam turbine low-pressure rotor last-stage blade processing device, which comprises a base and a polishing mechanism, the base is provided with an electric three-jaw chuck, the electric three-jaw chuck clamps a low-pressure rotor last-stage blade, the polishing mechanism comprises a shell and a first rotating shaft, and the first rotating shaft is provided with a polishing wheel; the polishing mechanism further comprises a rotating assembly and a transmission assembly, the rotating assembly comprises a second rotating shaft, the transmission assembly comprises a fixing seat arranged on the shell, a first lifting seat is slidingly arranged on the fixing seat, the first lifting seat is connected with the second rotating shaft, a spherical piece is rotationally arranged in the first lifting seat, and the spherical piece is connected with the first rotating shaft. The coal-fired unit steam turbine low-pressure rotor last-stage blade processing device can automatically adjust the contact angle of the polishing equipment with the blade, and can spray abrasive between the polishing equipment and the blade, so that the polishing effect on the blade is improved.

The present application relates to a steam turbine maintenance tool technical field, especially for a kind of steam turbine maintenance scraper, including scraper shell, the inside of scraper shell is provided with blade adjusting mechanism, the front of scraper shell is connected with scraper handle;Blade adjusting mechanism includes gear rotationally connected at the inside center of scraper shell, the inside of scraper shell and located at the front and back of gear both sides are meshed and connected with rack, rack outside is equipped with scraper blade, gear top is provided with limit hole, gear top is connected with rotating rod, one end of rotating rod is connected with knob and penetrates the top of scraper shell, the outside of rotating rod and located at the top of scraper shell is slidably connected with limit cover, the bottom of limit cover is symmetrically provided with fixed insertion rod and is used in cooperation with limit hole;Light socket is connected on scraper handle.The blade of both sides scraper is adjusted easily, satisfies the operation to the steam seal tooth slot of different width, and high accuracy of operation.

The application provides a kind of steam turbine governing system electric power step response simulation error analysis method and device, it is related to electric power equipment performance detection field, including: according to the parameter sample of steam turbine governing system electric power step response, preset sample polynomial is fitted, corresponding peak power arrival time is obtained;According to the sample polynomial and historical sample of fitting, the starting step time and steady state entering time of the parameter sample are determined;According to the peak power arrival time, the starting step time and steady state entering time determine the parameter identification error of the steam turbine governing system electric power step response.The application can determine the parameter identification error of steam turbine governing system electric power step response.

The application relates to a low-pressure exhaust device suitable for low-load operation of a steam turbine and the steam turbine, wherein the low-pressure exhaust device is arranged around the periphery of a rotor at the root area of a low-pressure exhaust passage, the low-pressure exhaust device is sleeve-shaped as a whole and gradually expands from the low-pressure last-stage blade to an exhaust guide ring; the inside of the low-pressure exhaust device is divided into multiple chambers by a rib plate, the corresponding outer circular wall of each chamber is provided with a first axial gap, a second axial gap and a radial gap, the first axial gap and the second axial gap are staggered with each other and are inclined to a direction favorable to the flow of exhaust steam, and the radial gap connects the first axial gap and the second axial gap; the bottom of the low-pressure exhaust device is provided with a flow guide part, an internal flow guide passage and a flow guide pipeline. The low-pressure exhaust device can reduce the probability of water drop scouring the root area of the last-stage blade, and realizes long-term continuous operation of the steam turbine under low-load working conditions.

The application discloses a heat exchanger and boiler flue gas waste heat recycling equipment, which comprises a base plate, heat storage mechanisms and steam turbines are installed on the upper surface of the base plate, the heat storage mechanisms are connected with the steam turbines through pipelines, the heat storage mechanisms absorb the heat of flue gas to generate water vapor, the steam turbines are driven to operate by the water vapor, the base plate is provided with a reversing mechanism, the reversing mechanism is installed on the output end of the steam turbine, and the base plate is provided with crushing mechanisms and generators on the left and right sides of the upper surface. According to actual working conditions, the waste heat power generation and the waste heat driven crushing can be flexibly switched, the limitation of single function of the traditional waste heat recycling equipment is broken, the coal blocks are fully crushed into small particles, the fuel loss rate is effectively reduced, the conversion of the furnace ash and slag from solid waste to recyclable resources is realized, the land resources and disposal costs required for the storage or landfill of the furnace ash and slag are reduced, and the environmental occupation and pollution pressure of the solid waste are reduced.

A steam turbine including at least one steam turbine section, wherein said at least one steam turbine section comprises at least two blade stages. Said blade stages include a row of fixed blades and an accompanying row of moving blades that is downstream of the row of fixed blades. Said blade stages include a single nucleating blade stage, and at least one downstream blade stage. Said at least one downstream blade stage is located downstream of said nucleating blade stage. Said nucleating blade stage is including the Wilson point. The stage loading of the nucleating blade stage is from 1.3 to 2.3. The stage loading of said at least one downstream blade stage is lower than the loading of the nucleating blade stage.

The utility model belongs to steam turbine equipment technical field, concretely relates to a steam turbine shaft seal rack assembly tool, and this tool includes: base, is equipped with the arc locating surface that matches with the curvature of shaft seal strip in its inner ring, a pair of support is arranged in both ends of base, the rotating drum is coaxially suspended in the above of arc locating surface with locating surface, the rotating shaft is through rotating drum and is rotatablely arranged on the support in both ends, drive assembly is connected with one end of rotating shaft, wherein, the rotating drum extends along the axial direction of rotating shaft, and there are multiple containing grooves in radial distribution, the containing groove extends along the circumference of rotating drum, covers the rack groove that shaft seal strip sets, and the depth of containing groove is adapted to the height of rack, when drive assembly drives rotating drum to rotate to the direction of arc locating surface, the lug of rack circumference is embedded in the rack groove.

The application relates to the technical field of sealing ring installation, and particularly provides a steam turbine valve rod sealing ring installation tool which comprises a pushing circular plate and a sleeve; first air passage grooves are arranged at intervals along the circumferential direction of the inner side wall of the pushing circular plate, second air passage grooves are arranged at intervals along the circumferential direction of the outer side wall of the pushing circular plate, and the first air passage grooves and the second air passage grooves respectively extend from the first end surface of the pushing circular plate to the second end surface along the axial direction of the inner side wall and the axial direction of the outer side wall of the pushing circular plate; the first end surface of the pushing circular plate is connected with the sleeve, and the inside of the pushing circular plate is communicated with the inside of the sleeve; the outer wall of the pushing circular plate and the outer wall of the sleeve are respectively matched with the side wall of the inner passage of the steam turbine valve shell in a gap mode, and the inner wall of the pushing circular plate and the inner wall of the sleeve are respectively matched with the outer wall of the steam turbine valve rod in a gap mode; the steam turbine valve rod sealing ring installation tool can form a gas flow path during the sealing ring installation process, realizes the rapid pressure relief of compressed air in the valve chamber, and enables the sealing ring to be smoothly embedded into the designated position.

A peak load and frequency regulation system for a thermal power unit, including a generator set and a peak load and frequency regulation unit. The generator set includes a main steam turbine, a generator, a condenser and a deaerator, a steam exhaust port of the main steam turbine is connected to an inlet of the condenser, and an outlet of the condenser is connected to an inlet of the deaerator. The peak load and frequency regulation unit includes a frequency regulation steam turbine, a clutch, a molten salt heat storage device and an electric heater.

The application provides a hazardous waste incineration waste heat intelligent gradient utilization system and method, the system comprises: a thermal energy gradient utilization subsystem and an intelligent control and optimization subsystem; the thermal energy gradient utilization subsystem is provided with multiple waste heat utilization units, wherein a high-temperature power generation level waste heat boiler is used for recovering high-temperature flue gas heat energy and generating steam to drive a steam turbine generator unit to generate power; a medium-temperature process driving level flue gas bypass system is used for providing a process heat source to a drying device and / or a denitration device to replace or partially replace auxiliary fossil fuel heating; a low-temperature heating / cooling level waste heat recovery device is used for recovering low-temperature flue gas waste heat and supplying energy to a plant area heating or cooling system; the intelligent control and optimization subsystem is used for acquiring incineration working conditions and operation state data of the multiple waste heat utilization units and performing coordinated control on the multiple waste heat utilization units. The application can meet the requirement of standard pollutant emission while improving energy utilization efficiency and reducing auxiliary fossil energy consumption.

A kind of marine steam turbine communication pipe single section cover analog whole machine installation method, it is related to marine steam turbine technical field.The present application includes the following steps: step one: two tooling supports are set in assembly site, two tooling supports are arranged in the theoretical position of high pressure interface and low pressure interface of communication pipe respectively, there is height difference between two tooling supports, the height difference is consistent with the actual height position deviation of high pressure interface and low pressure interface of communication pipe, to compensate the height deviation of interface and form stable support to communication pipe;Step two: high pressure pipe section and low pressure pipe section of communication pipe are installed to two tooling supports respectively, aligning connecting hole and fastening;By setting tooling support with height difference in assembly site, the actual position of high pressure interface and low pressure interface of communication pipe is accurately simulated, without the need to reposition the whole high pressure steam turbine, low pressure steam turbine and speed reducer and find center, the assembly, structural modification and real allocation operation of communication pipe can be completed, to meet the manufacturing demand.

The present application relates to a kind of shadow account-based steam turbine energy-saving operation adjustment method and system, belong to coal-fired unit steam turbine adjustment technical field.It includes the following steps: collecting unit steam turbine side operating parameters and encapsulating as cold end regenerative state package, construct corresponding different heat loss causes shadow entry, calculate each entry heat loss value and sort generation shadow account book;Combining with equipment safety boundary, parameter coupling relationship, parameter effect time delay etc.Construction parameter linkage corridor, under the corridor constraint, shadow entry is parsed into adjustment action and is sorted to form serial operation sequence, is issued to distributed control system execution;Collecting adjusted operating parameter feedback generation operation receipt, dynamically update shadow entry actionable confidence and parameter linkage corridor, and data is stored in historical strategy library.The present application can realize heat loss unified quantization sorting and multi-parameter collaborative safety adjustment, form self-learning iterative closed loop, effectively improve unit operation stability, reduce coal-fired unit heat consumption.

The application relates to the technical field of hypersonic aircrafts, and particularly discloses a heat protection and power generation integrated system and method based on a semi-open Rankine cycle, which comprises a water storage tank, a hydrogen storage tank, an electrolytic cell, a steam turbine, a heat exchanger, a hydrogen turbine and a combustion chamber. The system uses liquid water to absorb heat at the leading edge of the aircraft, vaporizes into water vapor to drive the steam turbine to generate power, realizes active heat protection and waste heat conversion; the water vapor after work exchanges heat with liquid hydrogen in the heat exchanger to condense, preheats the fuel while completing the Rankine cycle; the vaporized hydrogen drives the hydrogen turbine to generate power again, improving the power generation efficiency; the condensed water can be introduced into the electrolytic cell to be electrolyzed into hydrogen and oxygen, and the generated hydrogen directly supplements the fuel. The system realizes efficient heat protection, continuous power generation, in-situ production and supplement of fuel through structure coupling, and effectively reduces the mass of the homeward journey system by converting water into fuel in the middle and later stages of flight, thereby improving the endurance and high-altitude performance of the aircraft.

This utility model discloses a multi-path guided turbulence energy-saving steam seal body and steam seal; belonging to the field of steam turbine steam seal technology; its key technical points include a steam seal part provided on the inner end face; the steam seal part includes a first guide tooth opposite to the high-pressure gas, a first energy dissipation cavity provided on the inner end face between the first guide tooth and the external rotor boss, and a second energy dissipation cavity provided on the front side of the first energy dissipation cavity along the steam flow direction; the inner end face is provided with a front end face opposite to the inlet of the first energy dissipation cavity; the inlet and outlet of the second energy dissipation cavity are both located on the upper part of the corresponding inner end face, and a first diverting tooth is provided between the outlet of the second energy dissipation cavity and the inlet of the first energy dissipation cavity; this utility model aims to provide a multi-path guided turbulence energy-saving steam seal that reduces leakage and is used for steam sealing of steam turbines.

The utility model relates to a steam seal structure of steam turbine relates to steam turbine technical field, including the upper steam seal and lower steam seal of coaxial assembly together, the end surface middle part of lower steam seal both ends is vertically provided with the locating stud, and the rotating insertion slot is opened to the both sides end surface of parallelism of locating stud, and the locating stud is rotatably connected with the locating block in rotating insertion slot, and the rotating axle of locating block is horizontal, and the end surface middle part of upper steam seal both ends is vertically opened to be inserted into the locating insertion hole of locating stud, and the locating slot that the locating block rotates and inserts is opened to the side wall of locating insertion hole of upper steam seal, and the locating block rotates and hides to rotating insertion slot when inserting into locating insertion hole with locating stud, and the locating block rotates and partially inserts into the locating slot to limit the pulling out of locating stud when locating stud completely inserts into locating insertion hole, and the compression spring of pushing the locating block insertion locating slot is arranged in rotating insertion slot of locating stud. Its beneficial effect is that the assembly process is more convenient, and will not loosen because of long time vibration, is more safe.

The present application relates to air cooling unit energy saving and consumption reducing technical field, disclose air cooling unit column fan operation parameter determination method, device, equipment and medium, including: the exhaust pressure of exhaust main pipe and the condensate pressure of each column condensate way are collected;Based on the exhaust pressure and condensate pressure, the heat load of each column steam distribution pipe is calculated;Using the experimental data obtained in advance, the first relationship function between ambient temperature, electric power and fan optimal frequency is fitted;According to the thermal balance characteristics of steam turbine, the second relationship function between electric power and heat load is fitted;Based on the first relationship function and the second relationship function, the heat load deviation of each column steam distribution pipe and the optimal operating frequency of each column fan are calculated, the optimal operating frequency corresponding to each column fan can be calculated simply, which provides guidance for the economic operation of air cooling unit, achieves the purpose of deep energy saving and emission reduction, and the energy saving effect is remarkable, online real-time optimization calculation meets the needs of engineering.