CN102943737A - Ocean current energy generating set - Google Patents

Ocean current energy generating set Download PDF

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Publication number
CN102943737A
CN102943737A CN2012105226700A CN201210522670A CN102943737A CN 102943737 A CN102943737 A CN 102943737A CN 2012105226700 A CN2012105226700 A CN 2012105226700A CN 201210522670 A CN201210522670 A CN 201210522670A CN 102943737 A CN102943737 A CN 102943737A
Authority
CN
China
Prior art keywords
gear
ocean current
load
impeller
current energy
Prior art date
Application number
CN2012105226700A
Other languages
Chinese (zh)
Inventor
徐全坤
石茂顺
刘宏伟
李伟
林勇刚
Original Assignee
浙江大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 浙江大学 filed Critical 浙江大学
Priority to CN2012105226700A priority Critical patent/CN102943737A/en
Publication of CN102943737A publication Critical patent/CN102943737A/en

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

Abstract

The invention belongs to the field of new energy utilization, and in particular relates to an ocean current energy generating set. The ocean current energy generating set comprises an impeller, a transmission system, a three-phase alternating current generator and a load, wherein the transmission system is a planetary gear train; the planetary gear train comprises a first gear, an inner gear ring, a planet carrier, a planet wheel and a sun wheel; the ocean current energy generating set further comprises an electromagnetic brake system and a flow speed sensor, wherein the electromagnetic brake system comprises a second gear, an electromagnetic brake and a controller. After the technical scheme disclosed by the invention is adopted, the impeller and the transmission system can idle to reduce torque and asymmetric load which are applied to the impeller and the transmission system when the flow speed of the ocean current is too low to drive the electrical load to run. When being started or stopped, the ocean current energy generating set can be switched in or switched out of the generator and load according to a control rule through the controller of the electromagnetic brake, so that impact load to a gearbox, the generator and the load is reduced in a quick startup process of the impeller and in flow velocity and direction change of the ocean current.

Description

A kind of ocean current energy generator
Technical field
The invention belongs to the utilization of new energy resources field, be specifically related to a kind of ocean current energy generator.
Background technique
Along with the minimizing of resource and the increase of exploitation difficulty, the cost of traditional energy is more and more higher, and is more and more higher to the cry of new energy.The ocean more and more receives people's concern as the new energy of the nature amount of containing maximum.Ocean current energy generator has a lot, existing ocean current energy generator mainly contains two kinds, a kind of half straight drive generating set that comprises the components such as impeller, gear-box, generator, electrical load, a kind of is to utilize hydraulic system to replace the hydraulic generating set of gear-box part.
Because ocean current is subject to the impact of the many factors such as ocean current, typhoon, wave, the flow velocity of ocean current and flow to changefully, and electricity generating device generally all is to be immersed in fully in the seawater, so the ocean current energy generator working environment is very abominable.Existing half straight drive generating set is owing to adopting mechanical transmission fully.When the ocean current velocity ratio lower, when being not enough to the running of driven gear case and electrical load, impeller, gear-box transfixion can afford larger moment of torsion and non-symmetrical load, so that input shaft etc. deform, have a strong impact on the normal operation of unit and greatly reduce unit durability.When the ocean current flow velocity reaches unit and turns round required start velocity, the unexpected startup meeting of unit causes a great impulsive load to gear-box, gear-box passes to impulsive load generator and the load of back, and generator and load also can be subject to the impact of this impulsive load like this.When unit runs into emergency and need to brake, unit within the extremely short time, shut down also can gear-box and generator and the load of back produce larger impulsive load.These fatigue damages that all can aggravate unit reduce unit durability.
And adopt at present the ocean current energy generator of hydraulic transmission mode also to have Similar Problems.When the ocean current velocity ratio is lower, when being not enough to drive the oil hydraulic pump of hydraulic system and electrical load running, impeller, oil hydraulic pump transfixion can be subject to larger moment of torsion and non-symmetrical load.When reaching unit, the ocean current flow velocity turns round required start velocity or unit operation process when emergency occurring and need to brake, unexpected start and stop also can produce greater impact to oil hydraulic pump and hydraulic system, although hydraulic system can reduce impulsive load to a certain extent, but hydraulic system transfers efficient is low, greatly reduces the integral energy conversion efficiency of device.
Summary of the invention
The purpose of this invention is to provide a kind of ocean current energy generator, reducing in the ocean current energy generator performance during rapid starting period impulsive load to electrical load, and reduce impeller under the off working state, the suffered non-symmetrical load of transmission system.
A kind of ocean current energy generator, comprise impeller, transmission system, threephase alternator and load, described transmission system is a planetary gear train, described transmission system comprises the first gear, ring gear, planet carrier, planet wheel, sun gear, impeller connects with planet carrier by input shaft, at least two planet wheels are installed on the planet carrier, and the center line of planet wheel is parallel with the center line of planet carrier; Described planet wheel meshes with sun gear and ring gear simultaneously; Described the first gear is installed on the input shaft, and can rotate around input shaft; Described the first gear and ring gear are the integral type structure, and the center line of the center line of the first gear and ring gear coincides; Described sun gear connects with threephase alternator, and described threephase alternator links to each other with load; Described ocean current energy generator also comprises the electromagnetic braking system flow transducer of unifying, described electormagnetic braking sytem comprises the second gear, electromagnetic brake, controller, described the second gear is meshed with the first gear, the central shaft of described the second gear connects with the central shaft of electromagnetic brake, described controller is connected with electromagnetic brake, described flow transducer is connected with controller, and the center line of described impeller, input shaft, the first gear, sun gear, threephase alternator is on the same axis.
As preferably, described the first gear and the second gear are bevel gear.
As preferably, described the first gear and the second gear are cylindrical gears.
As preferably, the number of described planet wheel is three, is arranged in equably the circumferencial direction of sun gear.
As preferably, described load is one of user load, storage battery and electrical network or forms.
Adopt technological scheme of the present invention, smaller when the ocean current flow velocity, when being not enough to drive the electrical load running, can make impeller, transmission system idle running, reduce moment of torsion and the non-symmetrical load of action of ocean current on impeller, transmission system.When starting or stoping, controller that can be by electromagnetic brake is by certain control law incision or cut out generator and load, reduce in the performance during rapid starting period of impeller and the flow rate and direction of ocean current when changing to the impulsive load of gear-box, generator and load.
Description of drawings
Fig. 1 is ocean current energy generator embodiment's of the present invention structural representation.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Ocean current energy generator is that energy by ocean current is collected the device that is converted into electric energy, as shown in Figure 1, comprise impeller 1, transmission system 3, threephase alternator 5, load 6, electormagnetic braking sytem 4 and flow transducer 7, wherein, transmission system 3 is a planetary gear train, transmission system 3 comprises the first gear 31, ring gear 32, planet carrier 33, planet wheel 34, sun gear 35, and the center line of impeller 1, input shaft 2, the first gear 31, sun gear 35, threephase alternator 5 is on the same axis.Impeller 1 connects with planet carrier 33 by input shaft 2, and three planet wheels 34 are arranged in the circumferencial direction of sun gear equably, are installed on the planet carrier 33.In the concrete application example, require planet wheel more than 34 at least two.The center line of planet wheel 34 is parallel with the center line of planet carrier 33; Planet wheel 34 meshes with sun gear 35 and ring gear 32 simultaneously; The first gear 31 is installed on the input shaft 2, and can be around input shaft 2 rotations; The first gear 31 is the integral type structure with ring gear 32, and the center line of the center line of the first gear 31 and ring gear 32 coincides; Sun gear 35 connects with threephase alternator 5, and threephase alternator 5 links to each other with load 6; Electormagnetic braking sytem 4 comprises the second gear 41, electromagnetic brake 43, controller 42, the second gear 41 is meshed with the first gear 31, the central shaft of the second gear 41 connects with the central shaft of electromagnetic brake 43, controller 42 is connected with electromagnetic brake 43, flow transducer 7 is connected with controller 42, the flow velocity that flow transducer 7 detects also calculates by analysis and sends to controller 42, the information control electromagnetic brake 43 of controller 42 by receiving.
In concrete application example, the first gear 31 and the second gear 41 can be bevel gear or be cylindrical gears; Load 6 is one of user load, storage battery and electrical network or forms.
When the ocean current flow velocity is enough to drive the electrical load operation, come flow path direction to fix facing to ocean current in whole device, impeller 1 produces around the torque of central shaft under action of ocean current and rotates, the planet carrier 33 that drives transmission system 3 by input shaft 2 rotates, driving thus the planet wheel 34 that is installed on the planet carrier 33 rotates, planet wheel 34 1 sides and ring gear 32 engagements, one side and sun gear 35 engagements, so planet wheel 34 will rotate a part and pass to sun gear 35, a part passes to ring gear 32, ring gear 32 and the first gear 31 are one, the first gear 31 by with electormagnetic braking sytem 4 in the engagement of the second gear 41 transmission is passed to electromagnetic brake 43, the braking moment size of electromagnetic brake 43 is determined by controller 42.Controller 42 is on the basis of the flow speed data that flow transducer 7 collects, thereby can control the rotating speed size of the second gear 41 by certain control law control electromagnetic brake 43 braking moments, and control thus the rotating speed size of the first gear 31 and ring gear 32.The rotating speed size of ring gear 32 has directly determined the rotating speed size with sun gear 35 joining threephase alternators 5.When controller 42 was braked electromagnetic brake 43 fully, the energy by ocean current that impeller 1 is collected all passed to electrical load.If: impeller 1 rotating speed is n t, threephase alternator 5 rotation speed n g, electromagnetic brake 43 rotating speeds are n c, the rotation speed n of the first gear 31 b, sun gear 35 number of teeth z g, ring gear 32 number of teeth z b
The first gear 31 to the velocity ratio of sun gear 35 is:
i bg t = n b - n t n g - n t = z g z b - - - ( 1 )
As seen i bg t < 1 ;
Electromagnetic brake 43 to first gears 31 velocity ratios are:
i cb = n c n b - - - ( 2 )
Can be obtained by above two relations
n g = 1 i bg t &CenterDot; i cb n c + ( 1 - 1 i bg t ) n t - - - ( 3 )
In the formula second Be minus, that is to say that impeller 1 rotating speed is n tWith threephase alternator 5 rotation speed n gOpposite direction.From then on formula can be found out, in impeller 1 rotation speed n tUnder one stable condition, when the rotation speed n of electromagnetic brake 43 cDuring change, threephase alternator 5 rotation speed n tAlso can change thereupon.
Rotation speed n when electromagnetic brake 43 c=0 when namely electromagnetic brake 43 is braked fully, and threephase alternator 5 rotating speeds are:
n g = ( 1 - 1 i bg t ) n t - - - ( 4 )
Be that threephase alternator 5 rotating speeds directly pass to threephase alternator 5 fully by planetary gear train; Rotation speed n when electromagnetic brake 43 cWhen increasing gradually, threephase alternator 5 rotation speed n gAbsolute value reduce.Thereby control the rotating speed of threephase alternator 5 by controller 42 control electromagnetic brakes 43 rotating speeds, rotating speed control inputs by threephase alternator 5 is to electrical load power, reaches that to reduce that device start-up course and ocean current flow rate and direction change be the purpose of the impulsive load that produces.
When the ocean current flow velocity is not enough to drive the electrical load operation, be not enough to drive electrical load operation in the situation that the ocean current flow velocity is smaller, when controller 42 is totally released electromagnetic brake 43, impeller 1 and transmission system 3 idle running, there is not energy to be delivered to threephase alternator 5 electrical loads such as grade, reduce impeller 1, input shaft 2 and transmission system 3 are owing to moment of torsion and the ocean current flow rate and direction that transfixion produces changes the non-symmetrical load that causes.
The above only is better implementation example of the present invention, is not limited to the present invention, and is all within the present invention spirit and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (5)

1. ocean current energy generator, comprise impeller (1), transmission system (3), threephase alternator (5) and load (6), it is characterized in that: described transmission system (3) is a planetary gear train, described transmission system (3) comprises the first gear (31), ring gear (32), planet carrier (33), planet wheel (34), sun gear (35), impeller (1) connects with planet carrier (33) by input shaft (2), at least two planet wheels (34) are installed on the planet carrier (33), and the center line of planet wheel (34) is parallel with the center line of planet carrier (33); Described planet wheel (34) meshes with sun gear (35) and ring gear (32) simultaneously; Described the first gear (31) is installed on the input shaft (2), and can rotate around input shaft (2); Described the first gear (31) is the integral type structure with ring gear (32), and the center line of the center line of the first gear (31) and ring gear (32) coincides; Described sun gear (35) connects with threephase alternator (5), and described threephase alternator (5) links to each other with load (6); Described ocean current energy generator also comprises electormagnetic braking sytem (4) and flow transducer (7), described electormagnetic braking sytem (4) comprises the second gear (41), electromagnetic brake (43), controller (42), described the second gear (41) is meshed with the first gear (31), the central shaft of described the second gear (41) connects with the central shaft of electromagnetic brake (43), described controller (42) is connected with electromagnetic brake (43), described flow transducer (7) is connected with controller (42), described impeller (1), input shaft (2), the first gear (31), sun gear (35), the center line of threephase alternator (5) is on the same axis.
2. ocean current energy generator according to claim 1 is characterized in that, described the first gear (31) and the second gear (41) are bevel gear.
3. ocean current energy generator according to claim 1 is characterized in that, described the first gear (31) and the second gear (41) are cylindrical gears.
4. according to claim 2 or 3 described ocean current energy generators, it is characterized in that, the number of described planet wheel (34) is three, is arranged in equably the circumferencial direction of sun gear (35).
5. ocean current energy generator according to claim 4 is characterized in that, described load (6) is one of user load, storage battery and electrical network or forms.
CN2012105226700A 2012-12-04 2012-12-04 Ocean current energy generating set CN102943737A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2012105226700A CN102943737A (en) 2012-12-04 2012-12-04 Ocean current energy generating set

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104389729A (en) * 2014-10-11 2015-03-04 浙江大学 Sea bottom ocean current power generation and electric energy storage system
CN105201731A (en) * 2015-10-12 2015-12-30 李建利 Speed increaser for wind and hydraulic power generation
CN106687685A (en) * 2014-09-12 2017-05-17 三菱重工业株式会社 Method for starting ocean current power generation device and start control device
CN106894939A (en) * 2017-03-31 2017-06-27 浙江大学 Trunnion axis energy by ocean current generating set and its gearbox

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0587037A (en) * 1991-09-30 1993-04-06 Tokyo Eng Service Kk Variable pitch propeller driving device
JPH06280731A (en) * 1993-03-26 1994-10-04 Kawatetsu Techno Res Corp Method and device for conversion outputting reciprocating rotational input
CN101338812A (en) * 2008-07-14 2009-01-07 江苏泰隆减速机股份有限公司 Hydraulic generation speed variator
CN101392727A (en) * 2008-11-06 2009-03-25 上海应用技术学院 Automatic speed regulation and smooth rate apparatus for wind power generation system
CN101598113A (en) * 2009-07-10 2009-12-09 中国科学院电工研究所 A kind of wind generating unit
KR20110015334A (en) * 2009-08-07 2011-02-15 장상호 Hydro electric power generation
CN201753653U (en) * 2010-07-23 2011-03-02 华南理工大学 Variable-speed hydroelectric generator unit based on power split and confluence

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0587037A (en) * 1991-09-30 1993-04-06 Tokyo Eng Service Kk Variable pitch propeller driving device
JPH06280731A (en) * 1993-03-26 1994-10-04 Kawatetsu Techno Res Corp Method and device for conversion outputting reciprocating rotational input
CN101338812A (en) * 2008-07-14 2009-01-07 江苏泰隆减速机股份有限公司 Hydraulic generation speed variator
CN101392727A (en) * 2008-11-06 2009-03-25 上海应用技术学院 Automatic speed regulation and smooth rate apparatus for wind power generation system
CN101598113A (en) * 2009-07-10 2009-12-09 中国科学院电工研究所 A kind of wind generating unit
KR20110015334A (en) * 2009-08-07 2011-02-15 장상호 Hydro electric power generation
CN201753653U (en) * 2010-07-23 2011-03-02 华南理工大学 Variable-speed hydroelectric generator unit based on power split and confluence

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106687685A (en) * 2014-09-12 2017-05-17 三菱重工业株式会社 Method for starting ocean current power generation device and start control device
CN106687685B (en) * 2014-09-12 2019-02-05 三菱重工业株式会社 The starting method of power generation device from sea current and start-control device
CN104389729A (en) * 2014-10-11 2015-03-04 浙江大学 Sea bottom ocean current power generation and electric energy storage system
CN105201731A (en) * 2015-10-12 2015-12-30 李建利 Speed increaser for wind and hydraulic power generation
CN106894939A (en) * 2017-03-31 2017-06-27 浙江大学 Trunnion axis energy by ocean current generating set and its gearbox
CN106894939B (en) * 2017-03-31 2019-07-05 浙江大学 Trunnion axis energy by ocean current generating set and its gearbox

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Application publication date: 20130227