CN112377362A - Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment - Google Patents

Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment Download PDF

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Publication number
CN112377362A
CN112377362A CN202011382112.XA CN202011382112A CN112377362A CN 112377362 A CN112377362 A CN 112377362A CN 202011382112 A CN202011382112 A CN 202011382112A CN 112377362 A CN112377362 A CN 112377362A
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CN
China
Prior art keywords
generator
rotor
rotating speed
ocean current
turbine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011382112.XA
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Chinese (zh)
Inventor
车志伟
徐明奇
徐睿英
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Hainan Lanrui Technology Co ltd
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Hainan Lanrui Technology Co ltd
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Application filed by Hainan Lanrui Technology Co ltd filed Critical Hainan Lanrui Technology Co ltd
Priority to CN202011382112.XA priority Critical patent/CN112377362A/en
Publication of CN112377362A publication Critical patent/CN112377362A/en
Withdrawn legal-status Critical Current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
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/26—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using tide energy
    • 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
    • F03B11/06—Bearing arrangements
    • 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
    • F03B3/12—Blades; Blade-carrying rotors
    • 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

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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)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Oceanography (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention aims to realize high-efficiency utilization of ultralow-flow-rate weak tidal current energy of 0.3m/s or below, can generate power efficiently by only rotating no matter how slow the turbine rotates, and can generate power efficiently even if the rotating speed is only 0.1 rpm. In other words, the problem that the cutting speed of the magnetic lines of force of the generator in the prior art is not enough and the generator cannot generate electricity efficiently under the driving condition that the rotating speed of the turbine is very low is solved. The invention solves the problem of weak ocean current power generation by utilizing the characteristics of a single combined bearing and a method for adding a balance weight on a rotor. The invention has the advantages of simple structure, high mechanical strength, reliable performance, light weight, easy installation and wide application range.

Description

Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment
Technical Field
The invention belongs to the technical field of ocean energy development in renewable energy sources, and relates to a device for efficiently generating power by using ultralow-speed weak ocean current energy in ocean.
Background
The ocean current mainly refers to relatively stable flow in a submarine water channel and a channel, the tidal current mainly refers to regular seawater flow caused by tides, the ocean current and the tidal current are mixed, tidal current energy occupies a main part, the ocean current and the tidal current can be collectively called as tidal current, and tidal current power generation is a technology for generating power by utilizing kinetic energy of the ocean current. Generally, a hydraulic turbine set is used for generating electricity without damming. The energy of tidal current energy is proportional to the square of the flow velocity and the flow.
The utilization mode of tidal current energy is mainly power generation, the principle of which is similar to that of wind power generation, and tidal current power generation depends on the impact force of ocean current to rotate a water turbine and then drive a generator to generate power. However, since the density of seawater is about 835 times that of air and it must be placed under water, there are a series of key technical problems in power generation using ocean current, including turbine design, installation and maintenance, power transmission, corrosion protection, load and safety performance in the ocean environment, etc., and furthermore, the fixed form and turbine design of tidal current power generation devices and wind power generation devices are also very different. The tidal current device can be installed and fixed on the sea bottom or the bottom of a floating body, and the floating body is fixed on the sea through an anchor chain.
The tidal current water wheel power generation mainly has two forms, one is a horizontal shaft type, the other is a vertical shaft type, the vertical shaft type efficiency is not high, and the tidal current in all directions can be accepted. The horizontal shaft type efficiency is high, but the water wheel blade fan needs to automatically turn along with the tide and always aims at the incoming direction of the tide, so that the generating efficiency can be kept in the optimal state.
The change in tidal current energy is much smoother and more regular than for waves. Tidal current can change in size and direction twice a day as the tide rises and falls. Tidal current energy power generation has become a current research hotspot, tidal current energy has the advantages of strong predictability, high energy density and the like, but the defects of low flow rate, unstable direction and the like exist in a local range, and meanwhile, the severe marine environment also brings great difficulty to the development of a tidal current energy generator set. The improvement of the reliability of the generator set and the improvement of the overall efficiency become key technical problems in the development of tidal current energy generator sets.
Although only ocean currents with flow rates greater than 2m/s are internationally recognized as being economically valuable, the region of our country with sea velocities greater than 0.6m/s is no more than 10%, and the region with flow rates of 0.3m/s is more than 85%. If the ocean current power generation is realized in a wider sea area, the problem that the energy conversion under the condition of ultralow flow velocity and weak tide is realized must be faced.
The tidal current energy generator is also divided into a direct drive type and a speed-increasing type, the direct drive type is large in size, heavy in weight and easy to start, but the rotating speed is low, and the starting flow speed is about 0.4-0.5 m/s; the speed-increasing type has small volume, light weight and high rotating speed, but is difficult to start, and the starting flow rate is about 0.6-0.7. The existing power generation system can not be used for ultra-low flow velocity weak tide below 0.3m/s, can not be utilized and can not generate power. The main reason is that the ultralow flow velocity tidal current energy density is low, the weak tidal current cannot enable the turbine to rotate or can rotate, but the rotating speed is very low, so that the cutting speed of the magnetic line of force of the generator is insufficient, and the generating efficiency of the generator is reduced rapidly.
Disclosure of Invention
The invention aims to realize high-efficiency utilization of ultralow-flow-rate weak tidal current energy of 0.3m/s or below, can generate power efficiently by only rotating no matter how slow the turbine rotates, and can generate power efficiently even if the rotating speed is only 0.1 rpm. In other words, the problem that the cutting speed of the magnetic lines of force of the generator in the prior art is not enough and the generator cannot generate electricity efficiently under the driving condition that the rotating speed of the turbine is very low is solved.
The invention relates to a power generation core device suitable for an ocean power generation system with ultralow flow velocity and weak tide, which can realize the high-efficiency utilization of ultralow rotating speed, can also enable a coil to generate enough relative speed for cutting magnetic lines of force under the driving condition of low rotating speed, and realizes high efficiency in the process of converting mechanical energy into electric energy. The main structure is a special ultra-low rotating speed generator, which comprises a generator turbine, a transmission shaft, a one-way combined bearing, a generator rotor, a counterweight and a generator stator. The generator turbine is connected with the transmission shaft, the transmission shaft is coaxially connected with the inner ring of the one-way combined bearing, the outer ring of the one-way combined bearing is coaxially connected with the generator rotor, the rotor of the generator is connected with the balance weight, the one-way combined bearing is formed by coaxially and equidirectionally embedding two one-way bearings, and the outer ring of one-way bearing is embedded into the inner ring of the other one-way bearing. The one-way combined bearing is a bearing formed by an outer ring of one bearing and an inner ring of the other bearing.
The basic principle of the generator is that mechanical energy output by a transmission shaft is converted into gravitational potential energy of a generator rotor counterweight, the generator rotor and the counterweight rapidly rotate and fall in a free-fall mode after the mechanical energy reaches the highest point, the rotor speed of the generator reaches the maximum when the counterweight reaches the lowest point, and a magnet in the rotor and a stator move relatively when the counterweight reaches the fastest speed, so that sufficient magnetic line cutting speed can be generated, and the efficiency is highest when power is generated. At the moment, the rotating speed of the generator rotor greatly exceeds the rotating speed of the turbine of the generator, the generator rotor is separated from the power of the turbine main shaft due to the existence of the one-way combined bearing, kinetic energy cannot be reversely transmitted to the turbine, after the kinetic energy of the generator rotor is converted into electric energy, the speed is rapidly reduced and is lower than the rotating speed of the turbine, and the turbine drives the generator rotor to rotate through the one-way transmission mechanism at the moment, so that potential energy is accumulated, and the process is repeated. In this way, the weak ocean current drives the ultra-low rotating speed power generation.
The invention has the main advantages that: the device is mainly suitable for ultra-low flow velocity weak tide below 0.3m/s, has high power generation efficiency, long power generation time and wide application range, and is suitable for 85% of sea areas in China. The pulse generator can be very easily installed in a tidal current energy power generation system, has the advantages of simple structure, high mechanical strength, reliable performance, light weight, easy installation and wide application range, can be manufactured into different specifications according to different power requirements, and has low cost, long service life, small volume, no fear of seawater corrosion and no maintenance.
Drawings
FIG. 1 is a schematic diagram of an ultra-low speed pulse generator;
FIG. 2 is a schematic view of a one-way combination bearing;
FIG. 3 is a cross-sectional view of a generator with a turbine converting ocean current energy to generator rotor potential energy;
FIG. 4 is a cross-sectional view of the generator with the rotor at maximum potential;
FIG. 5 is a cross-sectional view of the generator with the rotor of the generator in a maximum kinetic energy state;
wherein: the generator comprises a unidirectional combined bearing 1, a generator rotor 2, a counterweight 3, a generator stator 4, a transmission shaft 5 and a generator turbine 6. 11 an inner ring of the one-way bearing 1, 12 an outer ring of the one-way bearing 1, 13 an inner ring of the one-way bearing 2, 14 an outer ring of the one-way bearing 2, 21 an outer ring of a generator rotor, 22 a magnet of the generator rotor and 41 a stator coil of the generator.
Detailed Description
A weak ocean current driven ultra-low rotating speed generator of marine environment monitoring equipment comprises a one-way combined bearing 1, a generator rotor 2, a balance weight 3, a generator stator 4, a transmission shaft 5 and a generator turbine 6. The generator turbine 6 is connected with the transmission shaft 5, the transmission shaft 5 is coaxially connected with an inner ring 11 of the one-way combined bearing 1, an outer ring 14 of the one-way combined bearing 1 is coaxially connected with an outer ring 21 of a generator rotor in the generator rotor 2, the outer ring 21 of the generator rotor is connected with the counterweight 3, the gravity center of the generator rotor (2) deviates from the center, the one-way bearing I is composed of the inner ring 11 and the outer ring 12, the one-way bearing II is composed of an inner ring 13 and an outer ring 14, the one-way combined bearing 1 is formed by embedding the outer ring 12 of the one-way bearing I into the inner ring 13 of the one-way bearing II.
Fig. 3, 4, and 5 show three states during power generation. The generator rotor 2 is light, the gravity center of the rotor deviates to one side of the counterweight 3, in fig. 3, external power slowly drives the generator rotor 2 to rotate through the generator turbine 6, the transmission shaft 5 and the one-way combined bearing 1, at this time, almost no electricity is generated due to the slow relative speed of the stator and the rotor, but mechanical energy is converted into kinetic energy of the rotor 2 and the counterweight 3 firstly and then converted into gravitational potential energy of the counterweight 3, the potential energy of the counterweight 3 is gradually accumulated, when the counterweight 3 on the generator rotor 2 rotates to the position above the generator, which is shown in fig. 4, the potential energy reaches the maximum value, at this time, as the generator rotor 2 can continuously drive the counterweight 3 to rotate forwards, after the generator rotor 2 and the counterweight 3 rotate continuously to pass through the top point, the gravitational potential energy of the counterweight 3 can be converted into kinetic energy. At this time, the unidirectional combination bearing 1 can only transmit mechanical energy in one direction and is transmitted to the generator rotor 2 through the generator transmission shaft 5, otherwise, the mechanical energy cannot be transmitted. Even if the counterweight 3 is in a falling state, the rotation speed of the generator rotor 2 is high, the mechanical energy of the generator rotor 2 is not reversely transmitted to the generator transmission shaft 5, the falling rotation of the generator rotor 2 and the counterweight 3 follows the energy conservation law, the rotation speed of the generator rotor 2 is the fastest when the counterweight 3 reaches the lowest point below the generator, as shown in fig. 5, the generator rotor 2 rapidly rotates around the generator stator 4, the generator rotor magnet 22 in the generator rotor 2 and the generator stator coil 41 on the generator stator 4 rapidly move relatively, and the purpose of rapidly cutting magnetic lines of force is achieved, so that electricity is generated. Due to energy conversion, the kinetic energy of the generator rotor 2 is rapidly consumed, the movement speed of the generator rotor 2 is reduced, if a part of kinetic energy is left, the generator rotor 2 continues to move forwards, the kinetic energy is converted into a part of potential energy of the generator rotor 2 again, the generator rotor 2 is driven to continue to rotate through the generator turbine 6, the transmission shaft 5 and the one-way combination bearing 1 under the action of sea current, and the situation shown in fig. 3 is changed again and again. In this way, the weak ocean current drives the ultra-low rotating speed power generation.

Claims (3)

1. A weak ocean current driven ultra-low rotating speed generator of marine environment monitoring equipment comprises a one-way combined bearing (1), a generator rotor (2), a balance weight (3), a generator stator (4), a transmission shaft (5) and a generator turbine (6). The generator turbine (6) is connected with the transmission shaft (5), the transmission shaft (5) is coaxially connected with the inner ring (11) of the unidirectional combined bearing (1), the outer ring (14) of the unidirectional combined bearing (1) is coaxially connected with the outer ring (21) of the generator rotor (2), and the outer ring (21) of the generator is connected with the counterweight (3).
2. The weak ocean current driven ultra-low speed generator of the marine environmental monitoring device as claimed in claim 1, wherein: the structure of the unidirectional combined bearing (1) is formed by embedding an outer ring 12 of a unidirectional bearing I into an inner ring 13 of a unidirectional bearing II in a same-direction coaxial mode.
3. The weak ocean current driven ultra-low speed generator of the marine environmental monitoring device as claimed in claim 1, wherein: the outer ring (21) of the rotor of the generator is connected with the counterweight (3), so that the gravity center of the rotor (2) of the generator deviates from the center, and the gravitational potential energy changes in the rotating process of the rotor (2) of the generator.
CN202011382112.XA 2020-12-01 2020-12-01 Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment Withdrawn CN112377362A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011382112.XA CN112377362A (en) 2020-12-01 2020-12-01 Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011382112.XA CN112377362A (en) 2020-12-01 2020-12-01 Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment

Publications (1)

Publication Number Publication Date
CN112377362A true CN112377362A (en) 2021-02-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011382112.XA Withdrawn CN112377362A (en) 2020-12-01 2020-12-01 Weak ocean current driven ultralow rotating speed generator of marine environment monitoring equipment

Country Status (1)

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Application publication date: 20210219