CN102062059A

CN102062059A - Multi-gear speed-increasing power generating device for wind power generation

Info

Publication number: CN102062059A
Application number: CN2010105029489A
Authority: CN
Inventors: 余汉明
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-10-12
Filing date: 2010-10-12
Publication date: 2011-05-18

Abstract

The invention discloses a gear speed-increasing power generating device for wind power generation projects. A plurality of primary large gears are arranged on a spindle of a wind impeller; a plurality of primary small gears are arranged around each primary large gear; and each primary small gear is coupled to a secondary speed-increasing power generating structure. The secondary speed-increasing generating structures are completely independent non-interference structures; high accuracy and high cost of construction are not needed, the number of the secondary speed-increasing generating structures is large, and even if the generated power is extra high, the load shared by the secondary speed-increasing power generating structures is light; therefore, the problem of extra high load among gear teeth of a high- or extra-high-power gear speed-increasing power generating device for wind power generation is radically solved; and the device has long service life and is convenient to maintain. The device can be designed into wind driven generators in various specifications, and many components can serve as general standard components.

Description

Wind-power electricity generation multi-gear speedup electricity generating device

Technical field

The present invention is the gear up electricity generating device in the wind-power electricity generation.Be high at load between large-scale wind generating gear speed increaser Transmitted chains, gear speed increaser must be heavy type, highi degree of accuracy, involve great expense, the drawback of difficult in maintenance, the high equipment of Cost of repair and maintenance and the invention done.This invention has fundamentally solved the high difficulty of gear transmission interchain load; And have extremely long, the very low advantage of cost in simple in structure, easy to manufacture, reliable, working life, and wherein a lot of component can make universal standard part, and this of different size kind of type wind-driven generator all can be general; High-rating generator is changed into the advantage that can give full play to influence generator after many medium and small generators generate electricity, and making is incorporated into the power networks need not numerous and diverse structure, and being incorporated into the power networks, it is little to impact.

Background technique

In the development and use of renewable energy sources, some countries, particularly Denmark, Germany, the Spain in Europe, wind-powered electricity generation has become the electric power chief component.The wind-power electricity generation of China also develops rapidly in the application.For wind-power electricity generation, Chinese Government has dropped into several hundred billion yuan, and Chinese large-scale wind driven generator basic model belongs to the Europe class structure, and the technical performance of this type is unsatisfactory.Its basic reason is to bear extraordinary heavy load in the Transmitted chains of wind power speed-increasing device, reaches high bearing capacity in order to ensure Transmitted chains, and the technology path of having taked speed increaser to be made complicated high-precision shunting jumbo is kept fan operation.

Specifically, the principle of wind generating unit is that wind-force promotes fan blade crop rotation low speed rotation, drives the electric generator generating after wind power speed-increasing device speedup.Because the moment of torsion of large-scale wind electricity speeder input, is taked many cover drive paths to bear load jointly and is gone up the generator for electricity generation scheme that drives through one thereafter in order to reduce the wheel Contact Stress of Gear at tens tons more than the rice.Though this transmission can reduce Contact Stress of Gear, must strict synchronism between Transmitted chains of each shunting, otherwise the gear teeth can damage because of interfering, and whole wind-powered electricity generation speed increaser speedup just must be the jumbo of high-precision complexity.Must need high-precision heavy equipment thus, but only have several families just to have high-precision heavy machine tool in the whole nation.In manufacture process, the raising of the increase of device fabrication expense and device fabrication grade of accuracy is to be exponential relationship, the gear transmission of middle low power usually, its accuracy of manufacturing grade 8-9 level, several thousand yuan to several ten thousand yuan approximately of its prices.And the device fabrication grade of accuracy 5-6 level of shunting gearing down, a transmission megawatt level power wind power speed-increasing device price is more than 1,000,000 yuan.Many drawbacks of the gear speed increaser of wind-powered electricity generation flow deviding type are just hampering the development of wind-power electricity generation now.

Summary of the invention

Wind-powered electricity generation flow deviding type gear speed increaser more now and traditional streaming gear reducer be not difficult to find they all be converge again after the shunting transmission of moment of torsion input back each shunting moment of torsion and by an axle output torque, necessary strict synchronism between the Transmitted chains of this kind of drive, otherwise the gear teeth can interfere damage, and whole system must be the jumbo of high-precision complexity.It distinguishes the former is speedup, and the latter is slowed down.In theory, the contact stress of wheel between cog can reduce by increasing area of contact, just must improve precision in order to improve contact, improve the sharp increase that precision is brought cost again, and it is limited to increase the area of contact degree, accuracy of manufacturing improves also limited, therefore follows existing shunting transmitting gear technology path and can't solve high contact stress difficulty at all.The purpose of wind-powered electricity generation gear speed increaser speedup is in order to obtain the high-speed driving generator for electricity generation.Many small generator electricity amounts are to wait electric weight that same high-rating generator send, according to this principle, high-rating generator of existing driving can be changed to the gearwheel that connects firmly with the fan blade main shaft and drive many small generators generatings simultaneously.Because this transmission is to drive many small generator generatings that separately independently, do not interfere with each other, and between each Transmitted chains tooth interference can not take place, though and have during each generator for electricity generation and asynchronously also can not influence electricity generation grid-connecting.The wind-powered electricity generation gear speed increaser just becomes the drive mechanism for the identical middle or small transmission power of routine of many structures like this, and this is the secondary speedup electrification structure in the multi-gear speedup electricity generating device of the present invention.That secondary speedup electrification structure size is little, structure is that simple, accuracy of manufacturing does not need is very high, manufacturing expense is very low, its quantity can be designed to several to tens as required, increase generator power, just become the number of the gearwheel that connects firmly for the increase main shaft and increase secondary speedup electrification structure quantity, so no matter the wind-power electricity generation acc power is much, all can make the suffered load of each secondary speedup electrification structure become underloading, secondary speedup electrification structure speed single-stage is slowed down enough, its long service life, easy to maintenance; Although a plurality of secondary speedup electrification structure quantity can reach tens, total cost is still not really high.The large scale computer generator is the thing that is easy to implement on electrical apparatus technology with medium and small generator for electricity generation.And adopt a plurality of medium and small generator for electricity generation, and the revolutional slip of influence generator allows value bigger, and this is peculiar benefit to the mechanical stress that reduces intrinsic power swing of wind-power electricity generation and wind energy conversion system and be hit frequently.The induction electricity generation grid-connecting is numerous and diverse unlike synchronous generator, and its shortcoming is the greater impact of being incorporated into the power networks, and adopts a plurality of small generators to incorporate measure in regular turn into, can make electrical network avoid greater impact; It is easily to go technically that generator is made middle-size and small-size power Wound-rotor type stepless speed regulation generator, and stepless stepless speed regulation generating can speed governing adopt middle-size and small-size power Wound-rotor type stepless speed regulation generator can make the speed governing of wind-power electricity generation become not only simple and reliable but also with low cost to keep the generator constant speed generation when wind speed changes.

Point out in " type of wind power generation speed increasing box and new development " literary composition of, Ge Yan, Wang Youfei good at the Zhao Yu of China Heavy Machinery Research Institute: " ... 2) base type multi-output shaft gear speedup case; the multi-output shaft formula gear speedup case that U.S. CLIPPER company releases adopts the base type structure; the transmission of two-stage speedup; but and output shaft as many as 2-10, and directly link to each other with middle speed generator.For example the wind power generating set of its 2.5MW has adopted 4 output shafts, and the middle speed generator with 4 660KW directly joins respectively.The advantage applies of base type gear speedup case following several aspect, at first be that component weight can alleviate, overall weight and size also obviously reduce, and are easy to install, safeguard and overhaul.Seat formula gear-box also is easier to be designed to easy-disassembling-assembling structure in the cabin in addition, is convenient to handle the fault of gear-box and changes the component that damage.The employing of multi-output shaft formula gear speedup case can make that also the overall dimensions of wind-powered electricity generation unit significantly reduces, and weight obviously alleviates, and this wind-powered electricity generation unit to the remote districts of coastal waters or inconvenience transportation is especially suitable.... " wind-power electricity generation multi-gear speedup electricity generating device of the present invention is can connect firmly more than one main gearwheel on the main shaft that connects firmly with fan blade, be furnished with a plurality of main small gears that have around each main gearwheel, each main small gear connects secondary speedup electrification structure and forms.But therefore more than its output shaft as many as 2-60, the total output that is to say the separate unit wind-driven generator can reach more powerful than the wind-driven generator of existing maximum-norm, but and all light runnings of each main small gear and secondary speedup electrification structure, whole wind-power electricity generation speeder than the multi-output shaft formula gear speedup case of U.S. CLIPPER company more according to advantage.

Description of drawings

In Fig. 1: preface 1 fan blade, preface 2 main bearings, preface 3 main shafts, 4 level pinion bearings of preface, preface 5 pinion shafts, preface 6 main small gears, preface 7 main gearwheels, 8 level small gears of preface, 9 level gearwheels of preface, preface 10 generators, 11 level speedups of preface electrification structure.Fig. 2 is preface 6 main small gears and preface 7 main gearwheels engagement sectional drawing; Fig. 3 is the structural drawing of secondary speed increaser and generator coaxle, in Fig. 3: identical among preface 1, preface 2, preface 3, preface 6, preface 7 prefaces, 10 generators and Fig. 1, preface 12 coaxial mechanical accelerators, 13 level speedups of preface electrification structure.Fig. 4 is secondary stepless speed regulation electric generator structure figure, in the drawings: preface 1, preface 2, preface 3, preface 6, preface 7, with Fig. 1 in identical, preface 12 coaxial mechanical accelerators, preface 14 stepless speed regulation generators, 15 level speedups of preface electrification structure.

Embodiment

Fig. 1 is the basic embodiment of wind-power electricity generation multi-gear speedup electricity generating device.Among the figure: 2 preface 2 main bearings are installed on the frame of wind-power electricity generation, and preface 1 fan blade and preface 3 main shafts connect firmly, and 2 preface 2 main bearings supporting preface 3 main shafts can turn round preface 3 main shafts, are connecting firmly a plurality of preface 7 main gearwheels on preface 3 main shafts.Each preface 4 pinion bearing also is installed on the frame of wind-power electricity generation, and preface 5 pinion shafts are by the supporting of preface 4 pinion bearings, and preface 6 main small gears and preface 5 pinion shafts connect firmly, and each preface 7 is that the main gearwheel is meshed with preface 6 main small gears.Preface 10 generators are installed on the frame of wind-power electricity generation, and its axle is connecting firmly 8 level small gears of preface.9 level gearwheels of preface and preface 5 pinion shafts connect firmly, and are meshed with 8 level small gears of preface.The gear up electrification structure that 8 level small gears of preface, 9 level gearwheels of preface, preface 10 generators have constituted the non-coaxial configuration of single-stage jointly is 11 level speedups of preface electrification structure.Show among Fig. 2 be preface 7 main gearwheels when being meshed with preface 6 main small gears at circumferential distribution map.Among Fig. 3: demonstration similar with Fig. 1, its difference is that preface 6 main small gears connect with preface 12 coaxial mechanical accelerators, preface 12 coaxial mechanical accelerators and preface 10 generators have been formed 13 level speedups of preface electrification structure; What show among Fig. 4 is similar with Fig. 1, and its difference is that preface 6 main small gears link with preface 12 coaxial mechanical accelerators, and preface 12 coaxial mechanical accelerators connect with preface 14 stepless speed regulation generator electric again, thereby have constituted 15 level speedups of preface electrification structure.

In Fig. 1, after wind blows preface 1 fan blade rotated, by the preface 3 main shafts rotation of preface 2 main bearings supporting, a plurality of prefaces 7 main gearwheels that connect firmly on preface 3 main shafts rotated thereupon, and the preface 6 main small gears that are meshed with it speedup just take place rotate; Preface 6 main small gears just drive 9 level gearwheels of preface and rotate through being bearing in preface 5 pinion shafts on preface 4 pinion bearings, the rotation of 9 level gearwheels of preface drives 8 level small gears of preface speedup again and rotates, and 8 little teeth of level of preface just drive preface 10 generator for electricity generation.The a plurality of prefaces 6 main small gears that are meshed with a certain preface 7 main gearwheels in Fig. 1 and 11 level speedups of preface electrification structure are symmetry axis axially distributing successively at preface 3 main shafts with preface 7 main gearwheels.The circumferential of cross section at each preface 7 main gearwheel then evenly distributes as shown in Figure 2.With preface 7 main gearwheels be that the secondary speedup electrification structure of many covers at center is at the many covers of axially having of preface 3 main shafts.Although secondary speedup electrification structure quantity can be numerous, it distributes rationally compact, and the diameter of preface 7 main gearwheels might not be very big, and it takes up space moderate.Each secondary speedup electrification structure is after preface 1 fan blade drives, because set overspeeding technique unanimity, generator speed difference is very little, behind relevant electrical equipment operation, be easy to electricity generation grid-connecting, and preface 7 main gearwheels to the motion of secondary speedup electrification structure output all is fully independently, the problem that does not have movement interference, therefore secondary speedup electrification structure only needs conventional middle low power transmission accuracy.13 level speedups of preface electrification structure is that its more compact structure takes up room still less with shaft mechanical speedup connecting generator among Fig. 3.Orderly 14 stepless speed regulation generators in 15 level speedups of preface electrification structure among Fig. 4, the signal adjustment that can in time send according to change of wind velocity makes generator speed with its electricity generation grid-connecting rotating speed of Wei Te.

Claims

1. a wind-power electricity generation gear up electricity generating device is characterized in that by main shaft, and more than one main gearwheel is arranged on the main shaft, is furnished with a plurality of main small gears that have around each main gearwheel, and each main small gear connects secondary speedup electrification structure and forms.

2. according to the described gear up electricity generating device of claim 1., it is characterized in that the speedup that each main small gear connects secondary speedup electrification structure is the mechanical transmission speedup.

3. according to the described gear up electricity generating device of claim 1., it is characterized in that the generator that each main small gear connects secondary speedup electrification structure can be the stepless speed regulation generator.