CN201696222U

CN201696222U - Disrotatory wind powered generator with front wind wheel and back wind wheel

Info

Publication number: CN201696222U
Application number: CN201020153905XU
Authority: CN
Inventors: 王掩刚; 赵龙波; 国睿
Original assignee: Northwestern Polytechnical University
Current assignee: Northwestern Polytechnical University
Priority date: 2010-04-08
Filing date: 2010-04-08
Publication date: 2011-01-05
Anticipated expiration: 2020-04-08

Abstract

The utility model discloses a disrotatory wind powered generator with a front wind wheel and a back wind wheel, which aims to solve the technical problem of low energy utilization efficiency of a traditional contra-rotating wind powered generator. The generator comprises two wind wheels with opposite fore-and-aft rotating directions, wherein the wind wheels drive an inner rotor and an outer rotor of a contra-rotating generator, three aerofoils with high lift-drag ratio are respectively arranged on a first wind wheel and a second wind wheel, and the enhancement of the utilization coefficient of wind power is met by reasonable power and flow matching. Therefore, the utilization efficiency of the wind energy of the generator is enhanced from 40 percent of the prior art to 58 percent.

Description

Front and back wind wheel is to the whirlwind power generator

Technical field

The utility model relates to a kind of wind-driven generator, and particularly a kind of front and back wind wheel is to the whirlwind power generator.

Background technique

With reference to Fig. 4.Document " patent No. is the Chinese utility model patent of ZL200720092269.2 " discloses a kind of to changeing wind-driven generator.This wind-driven generator is made of main shaft 21, internal rotor 5, external rotor 7, first wind wheel 18, second wind wheel 19 and shell 22.Its main shaft 21 devices middle part in internal rotor 5, internal rotor 5 are by two clutch shaft bearings, 2 devices middle part in external rotor 7, and first wind wheel, 18 devices are in main shaft 21 upper ends; In shell 22 inside, second wind wheel, 19 devices are in external rotor 7 upper ends by two second bearings, 9 devices for external rotor 7.This wind-driven generator adopts changeing wind wheel, can improve the energy conversion efficiency of single wind energy conversion system.But from open material, this wind-driven generator is a vertical axis wind-mill generator, belongs to shaft resistance type windmill, the wind wheel of two mutual counterrotating is installed on the same end of axle in addition, axial distance is less, produces the phase mutual interference, causes wind energy utilization relatively low.Its Wind Power Utilization efficient maximum also only is 40%.

Summary of the invention

Existing to changeing the low deficiency of wind-driven generator energy utilization efficiency in order to overcome, the utility model provides a kind of front and back wind wheel to the whirlwind power generator.This generator is made up of two wind wheels of front and back switched in opposite, drives transmitting the inner and outer rotors of motor, can further improve the Wind Power Utilization efficient of single wind energy conversion system.

The technological scheme that its technical problem that solves the utility model adopts: a kind of front and back wind wheel is to the whirlwind power generator, comprise first wind wheel 18, second wind wheel 19, internal rotor 5, external rotor 7, clutch shaft bearing 2, second bearing 9 and rare-earth permanent magnet 6, be characterized in: input shaft 1, back input shaft 10 before also comprising, preceding input shaft 1 is supported by the clutch shaft bearing 2 of case lid 4 ends before being fixed on, and second insulating bushing 23 is arranged between clutch shaft bearing 2 and the preceding case lid 4; Before an end of input shaft 1 first wind wheel 18 that is connected, the other end is connected on the internal rotor 5; Preceding input shaft 1 begins to its end by first insulating bushing, 3 parcels from the centre of high pressure collector ring 14 with low pressure collector ring 15; Coil winding is wound on the silicon steel sheet 17 of 28 concaveconvex structures, forms 28 coil winding; The two ends of coil winding are connected to electric bridge 11 input ends, after bridge commutating, form direct current, first insulating bushing, 3 inboards on the input shaft 1 before high voltage terminal imports by high pressure clamping bolt 13, first insulating bushing, 3 outsides on the input shaft 1 before low voltage terminal is connected in by low pressure clamping bolt 12; Back input shaft 10 is supported by second bearing 9 that is fixed in back box lid 8 rear ends; Back input shaft 10 1 ends second wind wheel 19 that is connected, the other end and external rotor 7 are connected, and external rotor 7 inboards are evenly distributed with 32 rare-earth permanent magnets 6; Preceding case lid 4 is connected to form an integral body with back box lid 8 by bolt 16, leaves and windmill tower frame 20 flange connecting.

On described first wind wheel 18 and second wind wheel 19 three high lift-drag ratio aerofoil profiles are arranged respectively.

The diameter ratio of described first wind wheel 18 and second wind wheel 19 is 1: 1.25.

The beneficial effects of the utility model are: since two wind wheels of front and back switched in opposite form to the whirlwind power generator, drive the inner and outer rotors of generator, make the Wind Power Utilization efficient of generator bring up to 58% by 40% of prior art.

Below in conjunction with drawings and Examples the utility model is elaborated.

Description of drawings

Fig. 1 is the structural representation of the utility model front and back wind wheel to the whirlwind power generator.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the overall structure figure of the utility model front and back wind wheel to the whirlwind power generator.

Fig. 4 is the structural representation of background technique wind-driven generator.

Among the figure, input shaft before the 1-, 2-clutch shaft bearing, 3-first insulating bushing, case lid before the 4-, 5-internal rotor, 6-rare-earth permanent magnet, 7-external rotor, the 8-back box lid, 9-second bearing, input shaft behind the 10-, 11-electric bridge, 12-low voltage terminal clamping bolt, 13-high voltage terminal clamping bolt, 14-high voltage terminal collector ring, 15-low voltage terminal collector ring, the 16-bolt, 17-silicon steel sheet, 18-first wind wheel, 19-second wind wheel, the 20-pylon, 21-main shaft, 22-shell, 23-second insulating bushing.

Embodiment

With reference to Fig. 1～3.Front and back wind wheel comprises first wind wheel 18, second wind wheel 19, preceding input shaft 1, back input shaft 10, internal rotor 5, external rotor 7, clutch shaft bearing 2, second bearing 9 and rare-earth permanent magnet 6 to the whirlwind power generator, before an end of input shaft 1 first wind wheel 18 that is connected, the other end connecting coil winding forms on the internal rotor 5, and input shaft 1 turned clockwise before first wind wheel 18 absorbed incoming flow wind power drive generator; Preceding input shaft 1 is supported by the clutch shaft bearing 2 of case lid 4 ends before being fixed on; Preceding input shaft 1 begins to its end by first insulating bushing, 3 parcels from the centre of high pressure collector ring 14 with low pressure collector ring 15; Coil winding is wound on the silicon steel sheet 17 of 28 concaveconvex structures, forms 28 coil winding; The two ends of coil winding are connected to electric bridge 11 input ends, after bridge commutating, form direct current, first insulating bushing, 3 inboards on the input shaft 1 before high voltage terminal imports by high pressure clamping bolt 13, first insulating bushing, 3 outsides on the input shaft 1 before low voltage terminal is connected in by low pressure clamping bolt 12; The high voltage terminal electric current is derived the electric energy of rotary component by high pressure collector ring 14, and low voltage terminal is connected to form path by low voltage terminal collector ring 15; Second insulating bushing 23 is installed between clutch shaft bearing 2 and the preceding case lid 4; Back input shaft 10 1 ends second wind wheel 19 that is connected, the other end and external rotor 7 are connected.Back input shaft is supported by second bearing 9 that is fixed in back box lid 8 rear ends; On first wind wheel 18 and second wind wheel 19 three high lift-drag ratio aerofoil profiles are arranged respectively, and through rational power and the satisfied wind power efficiency that improves of the coupling that flows.The diameter that wherein descends wind wheel 19 is 1.25 times of first wind wheel, 18 diameters, absorbs first wind wheel, 18 residue wind power.External rotor 7 inboards are evenly distributed with 32 rare-earth permanent magnets 6, are rotated counterclockwise in company with external rotor; Forward and backward case lid is connected to form an integral body by bolt 16, connects windmill tower frame 20 by mounting flange.

Front and back wind wheel is tested in small-sized low speed wind tunnel the whirlwind power generator, and voltage by measuring motor output and electric current and generator efficiency have obtained the power that wind energy conversion system produced.This wind energy conversion system startup wind speed is 1.0m/s after tested, can realize breeze wind, and power coefficient is 0.2; The interval power coefficient of 1～10m/s wind speed improves fast; Power coefficient 0.58 when design wind speed 10m/s; And, keep power coefficient about 0.58 in 10～15m/s wind speed section; 15～20m/s wind speed district power coefficient remains on about 0.5.

Claims

1. a front and back wind wheel is to the whirlwind power generator, comprise first wind wheel (18), second wind wheel (19), internal rotor (5), external rotor (7), clutch shaft bearing (2), second bearing (9) and rare-earth permanent magnet (6), it is characterized in that: also comprise preceding input shaft (1), back input shaft (10), preceding input shaft (1) is supported by the clutch shaft bearing (2) that is fixed on preceding case lid (4) end, between clutch shaft bearing (2) and the preceding case lid (4) second insulating bushing (23) is arranged; Before an end of input shaft (1) first wind wheel (18) that is connected, the other end is connected on the internal rotor (5); Preceding input shaft (1) begins to be wrapped up by first insulating bushing (3) to its end from the centre of high pressure collector ring (14) with low pressure collector ring (15); Coil winding is wound on the silicon steel sheet (17) of 28 concaveconvex structures, forms 28 coil winding; The two ends of coil winding are connected to electric bridge (11) input end, after bridge commutating, form direct current, last first insulating bushing of input shaft (1) (3) inboard before high voltage terminal imports by high pressure clamping bolt (13), low voltage terminal is connected in last first insulating bushing of preceding input shaft (1) (3) outside by low pressure clamping bolt (12); Back input shaft (10) is supported by second bearing (9) that is fixed in back box lid (8) rear end; Back input shaft (10) one ends second wind wheel (19) that is connected, the other end and external rotor (7) are connected, and external rotor (7) inboard is evenly distributed with 32 rare-earth permanent magnets (6); Preceding case lid (4) is connected to form an integral body with back box lid (8) by bolt (16), leaves and windmill tower frame (20) flange connecting.

2. front and back wind wheel according to claim 1 is characterized in that the whirlwind power generator: on described first wind wheel (18) and second wind wheel (19) three high lift-drag ratio aerofoil profiles are arranged respectively.

3. front and back wind wheel according to claim 1 and 2 is characterized in that the whirlwind power generator: described first wind wheel (18) is 1: 1.25 with the diameter ratio of second wind wheel (19).