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WO2020010872A1 - Générateur hydroélectrique à pression ultra-basse - Google Patents

Générateur hydroélectrique à pression ultra-basse Download PDF

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Publication number
WO2020010872A1
WO2020010872A1 PCT/CN2019/078802 CN2019078802W WO2020010872A1 WO 2020010872 A1 WO2020010872 A1 WO 2020010872A1 CN 2019078802 W CN2019078802 W CN 2019078802W WO 2020010872 A1 WO2020010872 A1 WO 2020010872A1
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WIPO (PCT)
Prior art keywords
casing
ultra
generator
hydroelectric generator
generator according
Prior art date
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Ceased
Application number
PCT/CN2019/078802
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English (en)
Chinese (zh)
Inventor
沈家同
刘建朝
吴正光
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Individual
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Individual
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Publication of WO2020010872A1 publication Critical patent/WO2020010872A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/08—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator for removing foreign matter, e.g. mud
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/16—Stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

Definitions

  • the invention belongs to a hydroelectric power generation device in the field of energy, and relates to an ultra-low head hydroelectric generator.
  • hydropower generation technology has received widespread attention; its principle is to achieve hydropower generation by flowing water to do work on the water wheel. ;
  • Traditional hydropower generally includes water turbines, generators, pipelines and ancillary facilities, pumping pumps, power management, etc .;
  • the construction of hydropower stations must have water flow drop to block dams, the structure is more complex, and resources are gradually becoming scarce. higher cost. Therefore, the construction of traditional hydropower stations is subject to very large restrictions.
  • the world's rivers, ocean currents, and tidal currents are very rich in hydropower resources, and more efficient, practical, and inexpensive new energy equipment is urgently needed to make full use of them.
  • the invention patent with authorization bulletin number CN103397975B discloses a standard floating tube type hydroelectric generator, which includes a floating tube speed increasing device, a water turbine and a generator; the floating tube speed increasing device is composed of a tubular water receiver, a working section and a draft tube; a water turbine The water turbine is connected to the generator in the working section between the water outlet of the tubular water collector and the water inlet of the tailpipe.
  • the hydroelectric generator disclosed by the present invention can directly use the natural water power of rivers, ocean currents, and tidal streams.
  • the advection water power generation device for electric energy is an efficient, practical, and inexpensive new energy equipment for the development and utilization of river, ocean current, and tide advection water hydraulic resources in the world.
  • ultra-low head hydraulic resources in the natural world that are difficult to effectively utilize by traditional methods such as pontoons, pontoons, and wave generators. Low-head hydropower equipment is imminent.
  • the present invention provides an ultra-low-head hydraulic generator in order to solve the problem that a large number of existing ultra-low-head hydraulic resources are difficult to effectively utilize traditional methods.
  • the present invention provides an ultra-low head hydroelectric generator, which comprises a diversion casing and a cone-shaped slag blocking net installed at the water inlet end of the diversion casing.
  • the small end of the slag blocking net is provided for connecting a steel wire rope.
  • Pull ring the big end of the slag block is detachably connected with the deflector casing, and the impeller, the speed increaser, the generator and the tail vertebra are installed in turn inside the deflection housing, and the impeller is connected to the input shaft of the speed increaser,
  • the output shaft of the speed reducer is connected to the shaft of one end of the generator, and the other end of the engine is connected to the tail vertebra.
  • Both ends of the speed increaser and the generator are provided with a waterproof seal structure, and the guide housing is evenly installed in the circumferential direction of the generator.
  • the connected support frame, the guide casing is in the shape of an arc-shaped cylinder recessed inside the guide casing, and the impeller is installed on the neck of the guide casing.
  • the diameter ratio of the rear end and the front end of the guide casing is 1.2 to 1.8.
  • the ratio of the length of the casing to the diameter of the rear end is 0.5 to 1.5, and a floating lifting device is installed at the upper end of the diversion casing.
  • the thickness of the middle portion of the diversion casing is uniform, and the thickness at both ends is greater than the thickness at the middle portion.
  • the floating lifting device includes a floating body and a floating body support.
  • the floating body is a cylindrical structure or a flat plate structure.
  • One end of the floating body support is connected to the floating body, and the other end is connected to the diversion casing.
  • the speed-up multiple of the speed increaser is 4-20.
  • the support frame includes a support leg and a hoop, the hoop is clamped on the engine casing to fix the engine, the support leg is connected to the casing by a fastener, and the fastener is a bolt.
  • the cross section of the support leg has a symmetrical airfoil shape, and the cross section of the support leg has a twist angle of 5-10 ° in the axial direction.
  • the supporting leg is cylindrical, and the cross section of the supporting leg has no twist angle in the axial direction.
  • the slag blocking net is welded into a tapered structure by a steel wire, and the taper of the tapered structure slag blocking net is 45 to 80 °.
  • the generator casing is made of aluminum alloy, the generator is a three-phase brushless alternator, and the generator is used for off-grid power generation or grid-connected power generation.
  • the number of supporting legs is three or four
  • the guide housing, the support frame and the tail vertebra are made of polymer material injection molding
  • the impeller is made of polymer or metal alloy.
  • the ultra-low-head hydroelectric generator disclosed in the present invention has an impeller, a speed increaser, a generator, and a tailbone installed inside the diversion casing.
  • the ultra-low-head water flows into the diversion casing and is guided in an arc-shaped tube. It accelerates under the action of the flow casing. After the initial acceleration, the water current acts on the impeller and pushes the impeller to rotate.
  • the input shaft of the speed increaser connected to the impeller is rotated.
  • the output shaft of the speed increaser drives the rotating shaft of the generator at a certain speed higher than the input shaft, so that the rotating shaft of the generator rotates at a higher speed to generate electricity. Therefore, the ultra-low-head hydraulic generator can also realize the reliable power generation of the generator under the condition of low water flow speed, reduce the demand for the water flow itself when the generator is used, and is suitable for large-scale popularization and application.
  • the ultra-low head hydroelectric generator disclosed in the present invention has a shortened length of the diversion casing compared with the existing hydroelectric generators.
  • the diversion casing When the ratio of the diameter of the rear end of the body to the front end is 1.2 to 1.8, and the ratio of the length of the diversion casing to the diameter of the rear end is 0.5 to 1.5, the power generation of the entire ultra-low head hydroelectric generator is the best, which is relative to the existing hydroelectric generator per unit time. The amount has been increased.
  • the hydroelectric generator that shortens the length of the diversion casing can save production costs compared to existing hydroelectric generators, and has a higher utilization rate of hydraulic resources.
  • the ultra-low-head hydroelectric generator disclosed in the present invention has a speed increase factor of 4 to 20 times, and the two ends of the speed increaser have a sealed structure. If the speed multiplier of the speed increaser is too high, the volume of the speed increaser will inevitably increase, which in turn will increase the volume of the buoyant generator and increase the production cost of the buoyant generator. If the speed multiplier of the speed increaser is too small, the power generation performance of the generator will be affected in some cases where the water flow speed is low. Setting the speed multiplier of the speed increaser to 4 to 10 times is a number of times. After field tests, it was determined that after this multiple of acceleration, it can meet the use of generators under most water flow conditions.
  • FIG. 1 is a front view of an ultra-low head hydroelectric generator according to the present invention
  • FIG. 2 is a right side view of the ultra-low-head hydraulic generator of the present invention
  • FIG. 3 is an axial view of an ultra-low-head hydroelectric generator according to the present invention.
  • FIG. 4 is a front view of a diversion casing of an ultra-low-head hydroelectric generator according to the present invention.
  • Diversion casing 1 impeller 2, speed increaser 3, generator 4, support frame 5, tail vertebra 6, slag block 7, floating body 8.
  • the ultra-low-head hydroelectric generator shown in FIGS. 1 to 4 includes a diversion casing 1 and a cone-shaped slag blocking net 7 installed on the water inlet end of the diversion casing 1.
  • the middle portion of the diversion casing 1 has a uniform thickness. The end thickness is greater than the middle thickness.
  • the diversion casing 1 has an arc-shaped cylindrical shape. Since the middle portion of the diversion casing 1 is concave, the diversion casing 1 can collect a large area of ultra-low current, and its kinetic energy, pressure energy, and potential energy make it enter the diversion casing. The water flow of 1 is gradually increased, so that the water flow entering the diversion casing 1 has an initial speed.
  • the diameter ratio of the rear end and the front end of the diversion casing 1 is 1.2 to 1.8, and the ratio of the length of the diversion casing 1 to the rear end diameter is 0.5 to 1.5.
  • the slag block net is welded into a tapered structure by a steel wire, and the taper of the tapered structure slag block net 7 is 45-80 °.
  • the small end of the slag blocking net 7 is provided with a pull ring for connecting the steel wire rope, the pull ring is used for connecting the steel wire rope, the wire rope is connected and fixed at the shore or the bottom of the water, and the large end of the slag blocking net 7 is detachably connected to the diversion casing 1.
  • An impeller 2, a speed increaser 3, a generator 4, and a tail vertebra 6 are sequentially installed inside the deflector housing 1.
  • the impeller 2 is installed at the neck of the deflection housing 1.
  • the impeller 2 is connected to the input shaft of the speed increaser 3.
  • the output shaft of the speed increaser 3 is connected to one end of the generator 4 and the other end of the engine is connected to the tail vertebra 6.
  • Both ends of the speed increaser 3 and the generator 4 are provided with a waterproof seal structure.
  • the speed increase factor of the speed increaser 3 It is 4 to 20, and the increase rate is determined after several field tests. After this acceleration, it can meet the use of generators in most water flow conditions.
  • the ultra-low-head water flow enters the guide casing 1 and accelerates under the action of the arc-shaped cylindrical guide casing 1. After the initial acceleration, the water current acts on the impeller 2 and pushes the impeller 2 to rotate, while the impeller 2 rotates Drive the input shaft of the speed increaser 3 connected to the impeller 2 to rotate. Under the speed-up effect of the speed increaser 3, the output shaft of the speed increaser 3 drives the rotation shaft of the generator 4 at a rotation speed higher than the input shaft, so that the rotation shaft of the generator 4 rotates at a higher speed for power generation. .
  • the shell of the generator 4 is made of aluminum alloy.
  • the generator 4 is a three-phase brushless alternator 4.
  • the generator 4 is used for off-grid power generation or grid-connected power generation.
  • the output of the generator 4 is connected to an external intelligent charging controller.
  • the intelligent charging controller has the maximum power tracking technology, which can charge the external battery.
  • the inverter is used after being inverted to 220V50Hz AC power, or the output end of generator 4 is directly connected to an external integrated inverter control machine via a wire. It does not require a battery and directly outputs 380 / 220V 50Hz AC power for direct use.
  • the generator 4 is used for grid-connected power generation, the output end of the generator 4 is connected to the grid-connected inverter via a wire, and the electric energy is input into the (national) power grid, and at the same time, it is provided for use by users.
  • a support frame 5 connected to the deflector housing 1 is evenly installed in the circumferential direction of the generator 4, and the support frame 5 is injection-molded with a polymer material.
  • the support frame 5 includes a support leg and a hoop. The hoop is clamped on the casing of the engine to fix the engine.
  • the support leg and the casing are connected by a fastener, and the fastener is a bolt.
  • the cross section of the support leg is a symmetrical airfoil, and the cross section of the support leg has a twist angle of 5-10 ° in the axial direction.
  • the number of support legs is three or four.
  • the impeller 2, the housing, the motor support 5 and the tail vertebra 6 can be made by polymer injection molding process.
  • the impeller 2 is an integral injection molded part or each piece is injection molded from aluminum alloy. Material wheels are connected together.
  • the deflector housing 1 may be an integral injection molded part or a block injection, and then connected together by a connecting member.
  • the support frame 5 may be divided into three or four pieces for injection molding.
  • the proper use of the conical tail vertebra 6 can make the water flow in the diversion casing 1 spread rapidly, and a large pressure difference between the front and rear sections, so that the water flow velocity in the diversion casing 1 increases, and the impeller 2 obtains a larger
  • the mechanical energy drives the generator 4 to generate electricity.
  • the ultra-low-head hydro-generator can achieve the power generation effect of the existing hydro-generators for water flow velocity below 0.8 m / s.
  • a floating lifting device is installed at the upper end of the deflector housing 1.
  • the floating lifting device includes a floating body 8 and a floating body support.
  • the floating body 8 is a cylindrical structure or a flat plate structure.
  • One end of the floating body support is connected to the floating body, and the other end is connected to the conductive housing 1. Due to the buoyancy of the floating body 8, the entire hydro-generator 4 can be guaranteed to float below the water surface.
  • the difference between the embodiment 2 and the embodiment 1 is that the supporting leg is cylindrical, and the cross section of the supporting leg has no twist angle in the axial direction.
  • the impeller 2 may also be made of a metal alloy material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hydraulic Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

Générateur hydroélectrique à pression ultra-basse comprenant une coque de guidage (1), et un filet de retenue de laitier conique (7) monté au niveau d'une extrémité d'entrée d'eau de la coque de guidage (1). Une turbine (2) dans la coque de guidage (1) est reliée à un arbre d'entrée d'un accélérateur (3). Un arbre de sortie de l'accélérateur (3) est en liaison d'arbre avec une extrémité d'un générateur (4), et l'autre extrémité du générateur (4) est reliée à un cône de queue (6). Des cadres de support (5) reliés à la coque de guidage (1) sont montés de manière uniforme dans la direction circonférentielle du générateur (3). Un dispositif flottant est monté à l'extrémité supérieure de la coque de guidage (1). Le générateur hydroélectrique résout le problème de l'utilisation efficace difficile des ressources d'eau à pression ultra-basse existantes dans un mode traditionnel.
PCT/CN2019/078802 2018-07-11 2019-03-20 Générateur hydroélectrique à pression ultra-basse Ceased WO2020010872A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810757375.0A CN108644058A (zh) 2018-07-11 2018-07-11 一种超低水头水力发电机
CN201810757375.0 2018-07-11

Publications (1)

Publication Number Publication Date
WO2020010872A1 true WO2020010872A1 (fr) 2020-01-16

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WO (1) WO2020010872A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108644058A (zh) * 2018-07-11 2018-10-12 重庆同利实业有限公司 一种超低水头水力发电机
CN111486044B (zh) * 2020-04-20 2022-01-07 重庆大唐国际彭水水电开发有限公司 一种具有防撞功能的水力发电机
CN112065639A (zh) * 2020-09-24 2020-12-11 沈荣华 一种海洋可再生能源综合利用的浮式发电装置
CN112713707A (zh) * 2020-12-08 2021-04-27 上海大学 一种基于磁通密度突变的旋转式微型水下发电机
CN117595571B (zh) * 2023-10-19 2024-05-14 东莞金坤新材料股份有限公司 适用小水流环境的环保永磁发电装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056169A1 (fr) * 2001-12-27 2003-07-10 Norman Perner Centrale electrique submergee
CN2906117Y (zh) * 2006-01-27 2007-05-30 陈际军 潜水式水流发电器装置
EP2110547A1 (fr) * 2008-04-17 2009-10-21 Aratec Engenharia, Consultoria E Representações Ltda. Assemblage d'une turbine hydraulique et d'un générateur électrique
CN103216375A (zh) * 2013-04-10 2013-07-24 河海大学 一种用于微水头电站的灯泡贯流式水轮机
CN106968870A (zh) * 2017-05-27 2017-07-21 重庆同利实业有限公司 浮管式水力发电机
CN107429656A (zh) * 2015-02-12 2017-12-01 液力能源公司 水电/水力涡轮机及其制造和使用方法
CN108644058A (zh) * 2018-07-11 2018-10-12 重庆同利实业有限公司 一种超低水头水力发电机
CN208441958U (zh) * 2018-07-11 2019-01-29 重庆同利实业有限公司 一种超低水头水力发电机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056169A1 (fr) * 2001-12-27 2003-07-10 Norman Perner Centrale electrique submergee
CN2906117Y (zh) * 2006-01-27 2007-05-30 陈际军 潜水式水流发电器装置
EP2110547A1 (fr) * 2008-04-17 2009-10-21 Aratec Engenharia, Consultoria E Representações Ltda. Assemblage d'une turbine hydraulique et d'un générateur électrique
CN103216375A (zh) * 2013-04-10 2013-07-24 河海大学 一种用于微水头电站的灯泡贯流式水轮机
CN107429656A (zh) * 2015-02-12 2017-12-01 液力能源公司 水电/水力涡轮机及其制造和使用方法
CN106968870A (zh) * 2017-05-27 2017-07-21 重庆同利实业有限公司 浮管式水力发电机
CN108644058A (zh) * 2018-07-11 2018-10-12 重庆同利实业有限公司 一种超低水头水力发电机
CN208441958U (zh) * 2018-07-11 2019-01-29 重庆同利实业有限公司 一种超低水头水力发电机

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