1346 results about "Hydraulic turbines" patented technology

Erosion resistant coating compositions include hard particles in a metal matrix such as nickel-based, cobalt-based and iron-based matrices applied by a plating process for complex geometry or hard to access component surfaces or by thermal spray processes for line of sight applications. These materials and processes are especially suited for providing erosion resistance to hydroelectric turbine components.

A small generator includes a hydraulic turbine provided in a fluid path rotating with a passage of a fluid in a predetermined flow and a rotator coupled to the hydraulic turbine rotating together with the hydraulic turbine which acts as a rotor portion opposed to a stator portion having multiple layers in a stepping motor including the stator portion, wherein the rotor portion relatively rotates with respect to the stator portion with the passage of the fluid, thereby generating a power.

The invention relates to a bi-reverse folding-type cross shaft tidal stream energy hydroturbine belonging to the technical field of electricity generation by utilizing tidal stream energy. In the bi-reverse folding-type cross shaft tidal stream energy hydroturbine, either end of a generator is provided with an impeller, a connecting rod, a steering joint and speed-increasing gearboxes, wherein the generator and the speed-increasing gearboxes at both ends are fixe on a common base which is mounted on a supporting column by the aid of a thrust gearing in a rotating mode, the supporting column is fixed on the cement basis of a seabed, and the blades of the impeller, the connecting rod and the supporting column adopt folding structures. The tidal stream energy hydroturbine reduces the size of the whole device and is convenient to transport by effective folding, avoids dismounting among all parts, decreases the mounting cost of the seabed by more than 50 percent than the traditional cost and prolongs the service life of the hydroturbine by longer than 5 years.

Erosion resistant coating processes and material improvements for line-of-sight applications. The erosion resistant coating composition includes nanostructured grains of tungsten carbide (WC) and/or submicron sized grains of WC embedded into a cobalt chromium (CoCr) binder matrix. A high velocity air fuel thermal spray process (HVAF) is used to create thick coatings in excess of about 500 microns with high percentages of primary carbide for longer life better erosion resistant coatings. These materials and processes are especially suited for hydroelectric turbine components.

The invention discloses a water-gas common-cabin electric power energy storage system utilizing a high pressure gasholder to maintain constant pressure. The water-gas common-cabin electric power energy storage system comprises a water-gas common-cabin, a compressor unit, a water pump unit, a water storage pool and a water turbine, wherein a water exhaust port of the water turbine supplies inlet water to the water storage pool through a pipeline, the water pump unit pumps water from the water storage pool through a pipeline, a gas exhaust port of the gas compressor unit is communicated with the water-gas common-cabin, a water outlet of the water-gas common-cabin is communicated with the water turbine, and a generator is driven by the water turbine to generate electricity for outputting electric energy. The water-gas common-cabin electric power energy storage system is characterized by also comprising a supercharger and the high pressure gasholder, wherein the high pressure gasholder is connected with two pipelines, one pipeline is communicated with an outlet at the upper part of the water-gas common-cabin through the supercharger, a water and gas separator and a first electric control valve, and the other pipeline is communicated with an inlet at the upper part of the water-gas common-cabin through a second electric control valve.

The invention discloses a motion object generation device, belonging to generation device technical field. The motion object generation device comprises a surface layer deformed when subjecting to force, a plurality of hydraulic cylinders arranged below the surface layer, a hydraulic turbine, and a generator connected with the hydraulic turbine; the hydraulic cylinder is internally provided with a hydraulic piston which can move up and down; the hydraulic piston is contacted with the surface layer; the hydraulic cylinder is internally provided with liquid; the hydraulic cylinder is provided with a liquid outlet and a liquid inlet; the liquid outlet and the liquid inlet are respectively connected with a check valve; the liquid outlet of each hydraulic cylinder is communicated with an inlet of the hydraulic turbine by a liquid outlet pipe; the outlet of the hydraulic turbine is communicated with a liquid inlet of each hydraulic cylinder by a liquid inlet pipe. The invention can convert the mechanical energy of vibration on the road surface caused by gravity of vehicle into the electric energy; with simple structure, the invention is a generation device without pollution or consuming the natural resources.

The invention discloses efficient three-wheeled telescopic folding horizontal-shaft tidal current energy generating equipment, belonging to the technical field of tidal current energy generation. The generating equipment is respectively connected with steering knuckles at two sides of a connection body through a telescopic folding cross arm; a generator and a speed-increasing gearbox are respectively fixed at one side of one steering knuckle; a small impeller is connected with the speed-increasing gearbox through a telescopic folding connection rod; the lower side of the steering knuckle is equipped with a rudder which can ensure the tidal current direction is directly opposite to the impeller; the top of the connection body is equipped with the other steering knuckle, and the generator and the speed-increasing gearbox are fixed at one side of the steering knuckle; and a large impeller is connected with the speed-increasing gearbox through the telescopic folding connection rod. The generating equipment is simultaneously provided with three hydro-turbine units for power generation, thus improving generating efficiency of single generating equipment; and main components adopt telescopic folding structures to achieve effective telescoping and folding, thus reducing volume of the whole equipment, facilitating transportation, avoiding disassembly and assembly among the components, reducing submarine installation cost by over 50%, and prolonging service life of a hydro-turbine by over 5 years.

Installation for harvesting energy of ocean currents (IHOC) in deepwaters is based on utilization of a semisubmersible platform and the multiple of vertically oriented Darrieus type hydraulic turbines. The turbines are located as close as possible to ocean surface, where speed of current is usually at its maximum. Since speed of current fluctuate during the seasons a system controlling buoyancy force of that keeps IHOC floating near surface is employed. The mooring system consists of three tethers, which prevent transferring of overturning moment applied to IHOC to anchoring base. The electric power generators are located in a machinery room on a structure well above sea level and would transmit electric power to the shore utilizing flexible cable. During hurricane it will be lowered to the depth preventing turbines from being affected by wave actions, at the same time it would keep machinery room above wave action. For the purpose of delivery assembled on shore Turbine Housing to destination site and installing it there a special convoy is formed consisting of Catamaran Delivery Barge and Stabilizing Platform.

The second Embodiment of this invention is designed to harvest energy of tides in deepwaters.

The invention discloses an optimization design method of a radial-flow-type hydraulic turbine. In the design method, a unitary thermal optimization design, a three-dimensional modeling method of a through-flow part and a complete machine optimization platform are utilized, wherein the optimization platform comprises four modules, namely nozzle blade and impeller blade parameterization, a coevolution genetic algorithm, a self-adaption approximation model, and autocall of CFD (computational fluid dynamics). Through the parameterization, characteristic variables describing impeller blades, nozzle blade patterns and installation angle variation are extracted. The optimization target is to enhance the overall efficiency and expansion ratio of the hydraulic turbine simultaneously under a complete machine environment. The optimization platform can be used for reducing the calculated amount and accelerating the convergence by virtue of the following measures: the approximation model is built and updated by a dynamic sampling strategy, and enough prediction accuracy is obtained by virtue of less CFD calculation; and a complicated multivariable optimization problem is decomposed into a plurality of relatively independent and interactive subproblems by virtue of the coevolution genetic algorithm, so that not only can the characteristics of the original problem be maintained, but also the calculated amount is reduced effectively.

A vertical axis wind and hydraulic turbine with flow control including a regular hexagonal structure of radius R, parallelepiped-shaped, inside which a rotor rotates with three or more vanes on a vertical axis which is located in the center of the hexagon as seen from above, wherein the vanes when rotating generate a circle of radius Rt, further including six articulated deflector vanes that grab and concentrate the flow of air or liquid entering the rotor vanes, from the wind or liquid current entry side to the turbine and diffuse the flow of air or liquid exiting from the rotor vanes, from the side opposite to the wind or liquid entry side to the turbine.

A method for accurately and continuously measuring and processing an axis throw of a hydraulic turbine set comprises the steps as follows: 1) according to a shafting composition of the set, a displacement sensor used for measuring outer wall displacement is arranged on each composition shaft and taken as a measuring point; 2) corresponding displacement values epsilon i are obtained according to rotation angles theta i; 3) according to multiple displacement values epsilon i, a fitting axis throw sine curve is obtained, and components of the maximum throw values on an X axis and on a Y axis are obtained through the throw sine curve; 4) the maximum throw eccentric distance and eccentric angle of each measuring section are obtained through calculation; and 5) a guide bearing measurement section is taken as a standard, and correction values of axis sections are obtained through calculation of coordinate points of the maximum throw eccentric distances. According to the method, an actual operation condition of the set can be more truly simulated, measured data are more accurate, the set is more accurately and faster adjusted, the installation rate of the set is accelerated, the installation quality of the set is guaranteed, and conditions are provided for safe operation of the set.

The invention discloses a PID hydraulic turbine governor parameter optimization method based on multi-working-condition time domain response. The method includes the following steps that (1) a hydraulic turbine regulating system model is built, wherein the hydraulic turbine regulating system model particularly comprises a PID hydraulic turbine governor model, a hydraulic turbine-water diversion pipeline model and a generator model; (2) parameters of the hydraulic turbine regulating system model are obtained in a field test and parameter recognition mode; (3) a comprehensive fitness function based on multi-working-condition time domain response is designed, and the optimization objectives of finding out an optimum PID control parameter and enabling a comprehensive fitness function value to be minimum are determined; (4) the optimal PIC control parameter is obtained through an intelligent optimization algorithm. The control parameters obtained through the method enable a system to keep satisfying dynamic characteristics under different working conditions, and robustness of the system is enhanced.

The invention belongs to the field of a novel renewable energy source technology and a marine device and in particular relates to a double-floating-body type wave energy power generation device utilizing a water turbine. The double-floating-body type wave energy power generation device comprises floaters, a piston, a connecting rod, a turbine generator, a hydraulic cabin and an anchor chain. The double-floating-body type wave energy power generation device is characterized in that the floaters are connected with the piston through the connecting rod; the piston is positioned in the middle of the hydraulic cabin; the hydraulic cabin is connected with a main water flow channel through a water outlet one-way valve; the turbine generator is arranged in the main water flow channel; the floaters move up and down along the water level change of the sea surface to drive the piston in the hydraulic cabin to move to further ensure that liquid in the hydraulic cabin flows to drive the turbine generator to generate power. According to the double-floating-body type wave energy power generation device disclosed by the invention, wave energy is converted into electric energy by utilizing the change of the water level of the sea surface along the wave transfer; the double-floating-type wave energy power generation device is applicable to a deepwater area, provides electric power for offline facilities, such as seaborne beacon lights and observation stations, simultaneously has relatively reliability and is easy to mount and move.

The invention discloses a high pressure heat insulation gas storage pumping compressed air energy storage system. Air in a water-gas common-cabin passes a supercharger and then directly enters a gas storage vertical shaft, and pressure of gas in the water-gas common-cabin passes is kept stable and unchanged. Potential energy and heat of compressed air are stored at the same time because of the thermal storage effect of the gas storage vertical shaft. At the stage of energy releasing, output electric energy of the system comprises the following two parts: for one part, high pressure air with certain temperature in the vertical shaft enters a turbine to do work through expansion; for the other part, water in the water-gas common-cabin pushes the turbine to generate electric energy, and the energy density and operating efficiency of the system are improved. As a heat insulating layer is arranged outside the gas storage vertical shaft, the air is high in temperature and flows through the turbine and is expanded, then the temperature is reduced, the fact that the temperature in the water-gas common-cabin is low is guaranteed, and damage to the turbine caused by temperature rise of wateris avoided. The system stores high pressure air through the gas storage vertical shaft, greatly reduces the investment cost of a high pressure container, shortens the payback time, and improves the operating economy.

The invention relates to a turbine engine that includes at least first and second lift turbine stacks with transverse flow. The shafts of adjacent turbines in the first stack are connected by a first coupling device adapted for compensating space misalignments, and the shafts of adjacent turbines in the first stack are connected by a second coupling device adapted for compensating for space misalignments. The turbine engine includes a device for supporting the first and second turbine stacks, which is symmetrical to said plane, and a control device adapted for permanently maintaining the symmetry between the first and second turbine stacks relative to the plane, and for maintaining the rotation speeds of the first and second turbine stacks at equal values in opposite rotation directions.

The invention relates to a 3D-printing sand core moulding method of a large-scale hydraulic turbine blade. In the method, a wood mould manufacturing process in a conventional casting production process is free while a plurality of moulds of sand cores are designed in 3D-cartographic software. The sand cores are directly printed and moulded by a 3D printer and finally the sand cores are assembled layer-by-layer to complete the moulding process. In the method, the conventional mould manufacturing process is omitted so that the 3D-printing sand core moulding method is significantly reduced in production period, is reduced in production cost, is high in moulding accuracy, is low in labor intensity, is low in environmental pollution and is especially suitable for large-scale hydraulic turbine blade production in various models and in large production scale.

The invention discloses an adjustment and control method for the synchronism of guide vanes of a large-scale water turbine, comprising the following steps: the resistance value of a drive coil of a servomotor is measured and then accurately defined in a single guide vane controller; the zero position and the full scale of a single guide vane instruction of the single guide vane controller are adjusted; a guide vane in the single guide vane controller synchronously controls adjustment of the zero position and the full scale of the instruction; the zero position and the full scale of a guide vane opening displacement sensor are adjusted; the vane mechanical bias voltage is measured and adjusted; the control parameter of the single guide vane is set; the synchronous control parameter of the guide vane is set; the starting time and the closing time of the guide vane are measured and adjusted; a single guide vane displacement transmitter gives a failure alarm; a single guide vane control loop gives an alarm; and an overall guide vane control loop gives an alarm. The adjustment and control method improves the control precision of guide vanes of a hydropower generating unit; the deviation of the opening instruction and the feedback is small; the action synchronism of the guide vane is good; both the starting time and the closing time of the guide vane meet the design requirements; the maximum deviation of the switching time is better than that of the standard requirement.

An ultra-low specific speed mixed-flow turbine relates to a mixed-flow turbine and belongs to the technical field of energy and power. A main shaft in the invention is arranged on a bearing support, and the bearing support is arranged in the middle of the upper side of a cover plate; the lower side of the cover plate is provided with the runner crown of a low specific speed turbine; the end of the cover plate is fixedly connected with a seating ring; the runner band of the low specific speed turbine is relatively arranged below the runner crown of the low specific speed turbine; one end of the runner band of the low specific speed turbine is connected with the seating ring, and the other end is connected with a conical draft tube; a metal scroll casing is connected outside the seating ring and is arranged on a rest pier; 16 to 18 single-row annular negative camber guide vanes are arranged on the seating ring, and the runner blades of the low specific speed turbine are arranged inside the inner cavity between the runner crown of the low specific speed turbine and the runner band of the low specific speed turbine. The invention solves the technical problem that low specific speed mixed-flow turbine has low efficiency and complicated structure in the prior art.

The invention discloses a method for restoring a crack of a blade of a hydraulic turbine. The method mainly comprises a preparation stage, a self-melting welding stage, a filling welding stage and an aftertreatment stage. At the preparation stage, the blade to be restored is cleaned and detected; at the self-melting welding stage, an inclined convergent laser beam with a negative defocusing amount is adopted for carrying out scanning in the extending direction of the crack, a V-shaped melting pool is formed, and molten metal liquid sinks to the bottom of the melting pool under the action of gravity, and is solidified to form a self-melting weld joint; at the filling welding stage, a material identical to a body of the blade is adopted as a welding wire for surface layer bead welding; at the aftertreatment stage, distressing tempering and blade surface finishing machining are carried out after welding is completed. In the restoring process, based on self-melting of the material of the body of the blade, the blade is filled with a few materials identical to the body of the blade, the material of the weld joint is identical to that of the blade, the material and the blade are combined well, a weld joint defect is not likely to be generated, and the combining strength of the weld joint is improved. In the self-welding welding and filling welding processes, molten metal in the melting pool is vibrated through ultrasonic waves generated by an ultrasonic generator on the back face of the blade to remove gas, and the defects of weld porosity and the like are reduced.

The invention provides a hydraulic turbine guiding blade double refining casting process, which adopts an AOD or VOD refining method to prepare a raw material consumable electrode, and the weight percentages of chemical compositions of the prepared raw material consumable electrode are : C is less than or equal to 0.05 percent, Si is less than or equal to 0.6 percent, Mn is less than or equal to 0.58 percent, P is less than or equal to 0.03 percent, S is less than or equal to 0.03 percent, Cr is between 11.5 and 13.5 percent, Ni is between 3.5 and 5.0 percent, Mo is between 0.4 and 1.0 percent, W is less than or equal to 0.5 percent, O is less than or equal to 0.008 percent, H is less than or equal to 0.00035 percent and the balance is Fe. Then a prepared consumable plate is made into a hydraulic turbine stainless guiding blade component by an electroslag smelting casting method; and the double refining casting process can refine and purify steel liquid completely and effectively so as to remove the gas and non-metallic inclusions in steel greatly. The crystal structure of the casting is uniform and compact, and has low sulfur and phosphorus content, less non-metallic inclusions, higher toughness, anti-fatigue performance and good welding performance.