Wind-driven power plant with hydraulic drive
FIELD: power engineering.
SUBSTANCE: wind-driven power plant with a hydraulic drive comprises a wind turbine, a hydraulic pump installed on its shaft, and a hydraulic motor connected with a shaft of a power generator. The hydraulic motor is equipped with a flow limiter. Between the hydraulic pump and the hydraulic motor there is a hydraulic cylinder with hydraulic and pneumatic cavities separated with a piston. The piston is connected with a stop valve on a discharge pipeline of the hydraulic cylinder and is equipped with a weight and/or the pneumatic cavity of the hydraulic cylinder is connected to the pneumatic system. The hydraulic drive is equipped with a hydraulic and pneumatic damper.
EFFECT: invention makes it possible to increase reliability of operation of a wind-driven power plant and to improve quality of generated energy.
2 cl, 2 dwg
The invention relates to the field of energy, namely wind power installations, the transfer of energy from the wind turbine to an electrical generator which takes place by means of the hydraulic drive.
Known wind power installation, comprising a wind turbine and directly associated with its shaft generator (see patent RU 42331791, CL IPC F03D 1/04, publ. 20.08.2008). The main disadvantage of the known device is the necessity of using multi-pole generators to produce electricity with the industrial frequency of 50 Hz as the frequency range of the rotation shaft of the wind turbine is in the range 80-150 rpm Such a mechanism have a large mass and dimensions, and have a complex switching equipment, significantly increasing the cost of energoustanovki in General. In addition, the weight of the generator must be centered at the top of the mast of the wind turbine (height of 10-15 m and more)that will require its high static stability and can lead to oscillations of the wind turbine in the low-frequency range with the possible occurrence of resonance phenomena caused by the rotation of the blades of the impeller.
Known wind turbine with hydraulic drive, which is the closest analogue to the claimed invention and includes the maintenance of the wind turbine, mounted on its shaft hydraulic pump and hydraulic motor connected to the shaft of the generator (see patent RU 42862, CL IPC F03D 9/00, publ. 20.12.2004). Hydraulic method for the transmission of energy of rotation of the wind turbine has a smaller weight and dimensions compared to the above method direct transmission, in addition, it allows installation of motor and generator on the ground that simplifies replacement and repair of certain equipment. The frequency of the generated current in the known device is controlled by the electric circuit operating the clutch. However, the use of the electrical control circuit is not reliable enough and leads to unnecessary complication of the switching installation.
Objective of the claimed invention is to remedy these disadvantages and to create a wind energy plant with hydraulic feedback, providing a constant rotational speed regardless of the wind load acting on the impeller wind turbines, and does not require rotation of its blades. The technical result is to increase the reliability of wind power plants and increasing resource of its work. The problem is solved and the technical result is achieved by the fact that the wind turbine with hydraulic drive includes a wind turbine, the us is set out on its shaft, the hydraulic pump and the hydraulic motor, connected with the shaft of an electric generator and hydraulic motor is equipped with a flow limiter, and between the hydraulic pump and the hydraulic actuator is a hydraulic cylinder with hydraulic and pneumatic cavities separated by a piston, which is connected with shutoff valve on the delivery pipe of the hydraulic cylinder. In this case, piston cylinder can be equipped with cargo and/or pneumatic cylinder chamber is connected with a pneumatic system. The hydraulic actuator is preferably equipped with a hydropneumatic damper.
Figure 1 presents the scheme of the proposed facility with a hydraulic actuator in which the piston of the hydraulic cylinder is equipped with a cargo;
figure 2 - installation, in which the pneumatic cylinder chamber is connected with a pneumatic system.
The hydraulic drive of the proposed wind energy plant consists of a hydraulic pump 1, which shaft is connected with the shaft of the impeller of the wind turbine, locking the rotary valve 2, the cylinder 4 with cavities And hydraulic and B - pneumatic, hydro-pneumatic damper 5, pneumomediastinum 6, gas cylinders 7, the flow limiter 8, the motor 9, oils 10 under pressure from the gas pipeline 11 and the drain pipe 12. The loading cylinder 4 can be implemented by setting the load 13 weight 5-10 tons (figure 1) or by connection is through the pneumatic cavity B with total air system (figure 2).
The proposed device operates as follows. At nominal operation wind load performance of the working fluid provided by the hydraulic pump 1, corresponds to the consumable consumption of the motor 9. This hydrostatic pressure in the cavity And the cylinder 4 is balanced by the pressure of gas into the cavity B of the pipe 11. The piston of the hydraulic cylinder 4 is currently in a stable condition without motion.
In the case of increasing wind load flow limiter 8 restricts the flow of fluid to the hydraulic motor 9 and the excess is fed into the cavity And the cylinder 4. The piston and piston rod of the hydraulic cylinder 4 is moved up to an extreme position, blocking the flow area of the shut-off valve 2. The hydraulic pump 1 and the shaft of the wind turbine under these conditions stopped. The other pneumatic cavity B, connected to a gas cylinder 7, accumulates energy gas compression, creating its pressure force equal to the load pressure of the working fluid. The volume of gas in the system is several times higher than the working volume of the fluid cylinder. Several of these volumes (gas cylinders) can provide a counteracting pressure exceeding the pressure of the working fluid by 8 to 10%. In the future, the power of the motor 9 of the working fluid is only due to the volume of the working fluid in the cavity And, under the pressure of the gas in the cavity B.
In case of reduction of wind loads or wind speed accumulator piston and rod of the hydraulic cylinder 4 is again moved to the lower position under the influence of gas pressure, and the volume of the working fluid flows freely to the motor 9. The piston rod of the hydraulic cylinder, moving, opens the valve 2 and restorative the impeller shaft of the wind turbine. The working fluid from the hydraulic motor 9 is in the tank and out through inlet pipe 12 is fed back to the hydraulic pump 1, closing the loop.
The shut-off valve 2 is provided with mechanism for fast switching on and off by means of a spring mounted on the axis of the arm of the crane (in the drawings is shown conventionally). With the rapid closing of the valve 2 may be a major overload on details of the impeller and the water pump from the inertial forces of the rotating masses, mainly the impeller wind turbines. To eliminate this phenomenon provides a hydropneumatic damper 5, the cavity of which is connected at the bottom with a discharge pipe 3, the upper gas pipeline 11. The volume of the upper cavity of the damper 5 allows you to smoothly retard the rotation shaft of the wind turbine, excluding the increased inertial load.
It should be noted that with a slight deceleration of the flow by the flow limiter 8 (to stop the hydraulic pump 1) the working pressure is th fluid will increase, together with an increased torque on the shaft of the hydraulic pump 1 and reducing the frequency of rotation of the impeller shaft of a wind turbine, which is a favorable factor.
At low wind loads, below par, the piston of the hydraulic cylinder 4 is always in the lowest position and the working fluid from the hydraulic pump 1 is directly supplied to the motor 9 of the generator through a flow limiter 8, which at this time is in a state of maximum flow freely passing through all of the working fluid.
Naturally, as in all such cases, it is necessary to use a frequency Converter, which must be maintained at the correct frequency. Thus, the action of the hydraulic system can be called cyclic, providing a constant flow at a constant pressure of the working fluid in all modes of wind loads, except below the nominal load. The cyclic action of the hydraulic system increases the reliability and life of the whole plant. An important advantage of this setup is that it allows the use of commercially available components (cylinder, damper, oil tank etc), which significantly reduces the cost of manufacture of the product. The proposed setup allows you to achieve 2-3% accurate maintenance is astate of rotation of the asynchronous generator, in the conventional mass production.
1. Wind power installation with a hydraulic actuator that contains a wind turbine mounted on its shaft hydraulic pump and hydraulic motor connected to the shaft of the generator, wherein the hydraulic motor is equipped with a flow limiter, and between the hydraulic pump and the hydraulic actuator is a hydraulic cylinder with hydraulic and pneumatic cavities separated by a piston, which is connected with shutoff valve on the delivery pipe of the hydraulic cylinder, the piston of the hydraulic cylinder equipped with cargo, and/or pneumatic cylinder chamber is connected with a pneumatic system.
2. Wind power installation according to claim 1, characterized in that the hydraulic drive is equipped with hydro-pneumatic damper.
FIELD: power engineering.
SUBSTANCE: rotor of a segment wind-driven electric generator comprises teeth, slots, a rim, spikes and a hub. Rotor teeth are made of a multi-strand cord laid between spikes at the inner side of the rim and forming slots behind the appropriate spikes. Ends of the cord are fixed with a coupling.
EFFECT: reduced mass and dimensions of a wind-driven electric generator rotor with minimisation of its cost due to simplified technology of manufacturing through usage of comparatively short sections of the cord, which are widely applied in lifting transport equipment and other industries.
FIELD: power engineering.
SUBSTANCE: wind and heat plant comprises a wind engine, a heat generator, a heat accumulator and according to the first version an accelerating power drive with a vertical auger mixer of a viscous working fluid, in the form of a suspension of heavy solid particles and viscous fluid, which are arranged in a central circulating pipe, equipped with side windows and installed with radial and axial gaps inside a heat insulated casing. The casing is equipped with tight rotation supports and a water coolant jacket and directly communicates with the heating radiator circuit, a hydraulic accumulator, a distributing tap and a circulating pump, kinematically connected with the wind engine shaft. According to the second version the wind and heat power plant comprises an accelerating power drive with a horizontal shaft and a drum mixer of working fluid, which are arranged inside a heat insulated casing, equipped with tight rotation supports and a water coolant jacket, directly communicating with the heating radiator circuit, a hydraulic accumulator, a distributing tap and a circulating pump, kinematically connected with a wind engine shaft.
EFFECT: higher efficiency and long-term accumulation of heat energy.
4 cl, 2 dwg
FIELD: power engineering.
SUBSTANCE: wind-driven station comprises several wind-driven plants with AC generators and an electromechanical converter with an AC motor, comprising a number of pole pairs equal to a number of wind-driven plants of the station. The winding of one pair of motor stator poles is connected with a stator winding of the generator of only one of wind-driven plants. The stator winding of the AC generator of the electromechanical converter is connected to the AC buses of the station. The motor of the electromechanical converter is made with additional poles, windings of pairs of which form the specified stator winding of the AC generator.
EFFECT: simplified design of a wind-driven station with the possibility to use it both with synchronous and asynchronous generators.
FIELD: power industry.
SUBSTANCE: friction heater includes a heated medium tank, in which there installed are fixed friction elements and turning friction elements connected to a drive shaft and installed with a gap between them, side walls and the bottom of the tank. Upper turning friction element is made in the form of a disc, and lower turning friction element is made in the form of a ring. Fixed friction elements are made in the form of shoes installed with possibility of their interaction with the turning friction disc and the ring. Mixing blades are installed between the disc and the ring. The tank is provided with holes in lower and side parts. Lower turning friction element can be made in the form of a ring with the width equal to width of lower friction shoe. Distance between the turning friction disc and the ring is more than their total thickness. Friction shoes can be pressed to the disc and the ring by means of stiff springs.
EFFECT: invention ensures simple design and enlargement of functional capabilities at reduction of cost.
4 cl, 1 dwg
SUBSTANCE: invention relates to ship building, more specifically - to floating power generation facilities. Sea floating power plant (SFPP) includes body in the form in plane of isosceles triangle at corners of which pillars with wind power plants (WPP) at their top ends are located; control house and anchor positioning system. In submerged parts of its body, through cuts are made, and freeboard height constitutes at least 0.01 of outer length of its board. WPP pillars are made as masts and are installed on upper deck. The height of WPP location on masts is not less than sum of its blade length and the greatest height of wave possible in corresponding aquatic area. Also, SFPP is fitted with equipment for electric power generation using wave energy, sea current energy, solar energy.
EFFECT: invention allows for lowering weight of structures and SFPP positioning system while increasing electric energy output and improving operation safety due to higher initial stability.
7 cl, 3 dwg
FIELD: power industry.
SUBSTANCE: conversion method and system of wind energy involves a closed circulating element located horizontally above the ground, on which at least one lifting body (6) is fixed by means of a retaining rope or a chain; at that, in the section of closed circulation trajectory (U), in which traction force directed in the circulation direction acts on lifting body (6) through the flow acting on the cross section subject to influence, distance between the circulating element and the lifting body is set to a larger value in comparison to the value in the section of closed circulation trajectory (U), in which no traction force directed in the circulation direction acts on lifting body (6) by means of the flow acting on the cross section subject to influence. Lifting body (6) during circulation relative to the flow is installed so that it undergoes the force component acting in the circulation direction even at the flow acting across instantaneous circulation direction of the circulating element and transmits the above force component through the retaining rope to circulating element (1), thus increasing the angular range of the circulation trajectory, inside which flow net energy can be used.
EFFECT: effective conversion of energy even of weak winds prevailing above the ground level.
15 cl, 7 dwg
FIELD: power engineering.
SUBSTANCE: tunnel power plant comprises an air turbine with a power generator communicated with an air intake located along the perimeter of the upper part of the diametrical cut of the tunnel following the shape of its upper part and a discharge air duct with a system of air valves. Passing-by vehicles are used as a piston. At the left and right side of the tunnel there is a system of rotor wind-powered generators with a vertical axis of rotation, connected to a load via a control system that accumulates and redistributes the received energy.
EFFECT: development of a device for production of energy by means of artificial creation of air pressure difference in an air tunnel and its efficient conversion by different methods into energy.
SUBSTANCE: invention relates to automotive industry. Proposed cowl consists of cylindrical body with ribbed surface and is secured on rod and two ball bearings. Said cowl serves to reduce drag by rotation and to convert said rotation into electro power.
EFFECT: decreased drag.
FIELD: power engineering.
SUBSTANCE: stator of a wind-driven power generator of synchronous type comprising a base, fastening elements, magnetic conductors and coils, is arranged in the form of two parallel T-shaped magnetic conductors, to the ends of which a "Ш"-shaped magnetic conductor is fixed so that edges of its horizontal link are joined with ends of vertical stands of T-shaped magnetic conductors, and vertical stands of the "Ш"-shaped magnetic conductor are covered with additional coils.
EFFECT: improved manufacturability, higher reliability by usage of windings of coil type, and also the fact that widely spread T-shaped and "Ш"-shaped magnetic conductors are used.
FIELD: power engineering.
SUBSTANCE: wind-driven power generator stator comprising a base, fastening elements, U-shaped magnetic conductors and coils, is equipped with strip magnetic conductors placed above ends of U-shaped magnetic conductors, at the same time thickness of strip magnetic conductors is equal to height of coil extension above ends of U-shaped magnetic conductors.
EFFECT: higher reliability and improved manufacturability based on using coil-type windings and widely spread U-shaped magnetic conductors.
FIELD: blowers united with wind turbine, possibly used in different branches of industry and in objects of social and living designation.
SUBSTANCE: blower includes drum impeller with vanes mounted in horizontal shaft. Impeller is arranged in cylindrical casing having air intake opening and diffuser. Novelty is wind turbine built-in to structure of blower system. Wind turbine includes wind wheel with vanes on horizontal shaft. Wind wheel is arranged in cylindrical casing with air intake opening and diffuser. Diffuser of blower is connected with air intake of wind turbine. Carrying structure of blower is joined with carrying structure of wind turbine.
EFFECT: improved design, enhanced efficiency.
3 cl, 6 dwg
FIELD: power engineering; small power stations with open turbine hall.
SUBSTANCE: proposed emf source has open turbine hall; foundation; electrical machine provided with rotor, stator, and current-collection unit and connected to drive; self-contained starting motors connected to power supplies; as well as control unit and output module. Novelty is that open turbine hall floor of emf source is provided with circular race, surface part of foundation is equipped with anchor straps, slabs, locking brackets and rollers, aligning brackets and rollers; rotor is installed in journal bearing on annular support of foundation rotor; shaft of the latter has axial hole with service lines; source has supporting and aligning slab incorporated in frame built of hold-down beams, thrust columns, frame and foundation; it also has capital, rotor and stator drive mechanism, pods, aerodynamic compensator, distribution board, jet thrust matching device, thrust electric circuit switch, and auxiliary equipment power supply unit.
EFFECT: simplified design, facilitated maintenance of unit incorporating emf source; enhanced efficiency.
1 cl, 16 dwg
FIELD: wind-power engineering; electrical energy generation.
SUBSTANCE: proposed wind-powered generator has tower with adjustable windwheels, windward positioning device, wound rotors and stators; rotors are made in the form of concavo-concave aerodynamic disks mounted on ends of blades; stator has pole shoes whose ends are coupled with rotors. Windwheels are mounted on shafts of convertible electrical machines incorporating stator excitation system and rotor inductor; inductor coils are connected to rectifiers mounted on windwheel blades; rectifier outputs are connected to field coils installed in rotor disks.
EFFECT: enhanced specific load, reduced starting torque, facilitated acceleration to rated speed.
1 cl, 3 dwg
FIELD: wind-power engineering; wind power generators.
SUBSTANCE: proposed windmill-electric generating unit has electric generators; novelty is that this unit is made in the form of flow-through piping network with sealed valves and pressure transducers, generating unit ends being disposed in areas held at different atmospheric pressures; piping length and diameter meet following expression: D/L = ρλv
EFFECT: provision for continuous operation of windmill-electric generating unit.
1 cl, 1 tbl
FIELD: wind-power engineering; generation of electric power.
SUBSTANCE: proposed wind-power electric generator has tower with swivel cross-member and wind wheel, wind setting unit, rotors and stators with windings; rotors are made in form of aerodynamic washers having shape of concavo-concave disks secured on ends of blades and stator is provided with pole pieces whose ends are magnetically connected with rotors which are magnetically connected with additional stators; blades are provided with additional rotors magnetically connected with additional stators; additional rotors are electrically interconnected.
EFFECT: reduction of starting torque.
FIELD: wind power engineering.
SUBSTANCE: invention relates to plants generating electric energy to produce hot water for industrial use. Proposed combination wind power plant containing energy generating unit in form of windmill, air flow booster connected with windmill and energy generating and transforming unit in form of air turbine and generator connected to turbine, generator being butt-joined with gas-turbine turbine engine is furnished, according to invention, with heat recovery unit and processing unit, for instance, sea water freshening and cleaning unit made in form of thermal distiller and reverse osmosis device connected with heat recovery unit. Blades of windmill are made divided into sections for turning relative to each other with possibility of turning relative to longitudinal axis. Energy generating and transforming unit is provided with additional self-contained internal combustion engine and electric generator connected with said engine which is coupled with generator of gas-turbine unit to form common power unit. Control system includes device which, together with computer, provides electric parameters similar to network parameters. Energy generating unit is provided with device to divide air flow, said device being connected by flexible air line with air flow booster made programmable, for instance, pneumatic and multistage, whose low-pressure stage is connected with air turbine and with each member of processing unit, and high-pressure stage, with device to evaporate water of thermal distiller and reverse osmosis device which are connected with heat recovery unit. Point of connection of air line and power supply line is common, and torsion shafts coupled with vane engine and turbine are connected to said point.
EFFECT: increased efficiency owing to recovery of exhaust (hot) gases of engine and dissipation heat, enlarged sphere of industrial application of plant.
34 cl, 1 dwg
FIELD: power and heat supply.
SUBSTANCE: invention relates to self-contained power, heat and hot-water supply systems of dwelling houses and industrial buildings. Proposed system contains wind power generating plant for generating electric power and connected with power consumers; energy accumulator connected with wind power generating plant and power consumers; plant for converting solar energy into heat energy and heat accumulator, both connected with heat energy consumers. System includes heat pump driven by wind power generating plant and connected with heat energy consumers; inverter through which electric energy accumulator is connected with electric energy consumers; sewage water heat recoverer; Earth heat collector and automatic control system connected through heat and electric load transmitters with actuating mechanisms. Plant for converting solar energy into heat energy contains gang of solar collectors connected by heat carrier lines with at least two heat exchangers, one of which is arranged in heat accumulator and the other in heat exchange device connected by heat carrier line with Earth heat collector. Heat pump contains compressor driven by wind power generating plant, at least two extension evaporators and at least two extension condensers. Extension evaporator is built into heat exchange device connected by heat carrier line with Earth heat collector. Extension evaporator is built into sewage heat recoverer. Extension condenser is built into hot-water tank, and second extension condenser is built into heat exchange device connected by heat carrier lines with heat energy consumers.
EFFECT: improved reliability and economy of self contained power and heat supply systems.
10 cl, 5 dwg
FIELD: wind power engineering.
SUBSTANCE: invention can be used for converting energy of air flows into electric energy. Proposed method includes passing of first on-coming air flow between two conversing and diverging aerodynamic surfaces in direction of flow to form zone of reduced pressure and transmitting of second air flow along pipeline from surrounding space into zone of reduced pressure. Converter is installed on way of second air flow. Space is made in zone of reduced pressure in, at least, one of aerodynamic surfaces to provide swirling of second air flow by wall of said space. Swirling of second air flow is formed tangentially in direction of passing of first on-coming air flow. Device contains two plates. Pipeline is designed to transmit second air flow. One end of pipeline is made open and it is connected with surrounding space, and other end is connected to outer surface of one of plates. Converter is installed in pipeline. AT least one of plates is provided with space to swirl second air flow. Space communicates with pipeline. Space is made orthogonally relative to direction of first on-coming air flow tangentially in direction of first on-coming air flow.
EFFECT: improved efficiency of energy conversion.
23 cl, 14 dwg
FIELD: heat power engineering.
SUBSTANCE: invention can be used for heating and hot water supply of different buildings. Proposed wind-heat generator contains water heat accumulator, windmill, bevel gear train (transmission), mechanical heater in form of agitator with movable blades each pair of which is made to centrifugal governor scheme (Watt governor). Wind heat generator is furnished additionally with second bevel gear train (transmission) rotating in opposite direction relative to first bevel gear train, each train being provided with equal number of agitators with movable blades.
EFFECT: increased efficiency of utilization of wind energy in wider range of wind velocities, improved reliability of heat generator and reduced cost of thermal energy.
FIELD: wind power engineering.
SUBSTANCE: invention relates to wind plants for direct conversion of wind energy into thermal energy. Proposed wind thermal plant contains windwheel with rotary blades and friction heat generator with heat exchanger. Novelty is that heat generator is made in form of conical drum with ribbed surface and rotor is provided with friction lining being installed on shaft of windwheel. Pressure of lining onto drum surface depends on wind head. Heat exchanger is provided with air intake. Windwheel is provided with speed and vibration protective device.
EFFECT: simplified design, improved reliability in operation within wide range of wind loads with provision of ventilation of heat rooms.
2 cl;, 4 dwg