DE102009011950A1 - Flow converter i.e. wind power converter, for use in e.g. small industrial area, has tower extending through rotor group, which is rotatably supported at two tower locations that are arranged at distance from each other - Google Patents

Abstract

The converter i.e. wind power converter (2), has a rotor group (4) provided with a rotor module (6) and arranged at a tower (10), which extends through the rotor group. A circular drive element i.e. geared ring (12), is provided at a lower end of the rotor group for transmitting rotational movement of the rotor group. The drive element is arranged in a region of a lower plane (14) of the rotor module. The rotor group is rotatably supported at two tower locations that are arranged at distance from each other. A coupling unit points a rotation center of the drive element.

Description

Technical area

The The invention relates to a flow converter, in particular a wind turbine converter for domestic and / or small commercial area, which is at least one of a flow having a rotatable rotor group with at least one first rotor, wherein the rotor group is arranged on a mast.

State of the art

Flow converters of the type mentioned are known in the art. Such flow converters are used for example in the US 4,784,568 . US 4,359,311 . US 5,494,407 as well as the US 2007/0104582 A1 described. The wind power converters described there each have a rotor with a vertical axis of rotation, which is designed according to the Savonius principle. Such a rotor has a lower and an upper circular plate-shaped rotary member, which are rotatably coupled to an output shaft of the rotor. Between the rotary parts, the blades of the rotor are arranged, which in turn are fixedly connected to the rotary parts.

From R & S Wind Energy GmbH & Co. KG Furthermore, small wind turbines are known that with a frame construction work in which the rotors are in a frame, with bearings and counter-bearings, are stored for a rotor shaft. This requires a considerable constructive effort and can also be negative Turbulence of the wind in the area of the rotors through the frame construction favor. This framework thus has a disadvantageous effect on the flow of the rotors out with wind and reduced therefore the efficiency of the plant. In addition, through the frame construction requires a larger space.

Of Furthermore, small wind turbines are known in which rotors a so-called flying wave are arranged. A flying wave is a rotatably mounted on one side of a mast of the wind turbine Wave. Between mast and shaft is usually arranged a generator, which converts the movement of the shaft into electricity.

adversely here is that on the storage of the flying wave large acting on mechanical loads. These burdens lead to tilt the flying wave relative to the mast, causing the Storage is loaded on one side, resulting in damage or to wear the relatively expensive shaft and / or the can lead to expensive storage.

One Another disadvantage is the high weight of the shaft, due to the stability requirements is required. The high Dead weight causes a high starting torque, which leads to that the rotors of such small wind turbines only at higher Wind forces begin to turn. This reduces the field of application small wind turbines on regions where regular stronger winds prevail and reduce over it In addition, the efficiency of the plants.

One Another disadvantage is that due to the necessary arrangement of the generator between mast and shaft the generator in its construction and design must be made specially. This requires elaborate tests in wind tunnels with long delivery times.

The used generators must go beyond that usually exactly the size of the small wind turbine be interpreted. The generators are regular for this reason Custom-made products, produced in small quantities and are therefore expensive.

It is also known to use commercial generators, However, this in turn requires a transmission, which besides the extra cost of the gearbox considerably reduces the efficiency of the system.

task

From that the invention is based on the object, a flow converter of the type mentioned above to improve that the design effort is significantly reduced, the efficiency of the flow converter should be as high as possible and the flow converter withstand high loads without premature wear should.

Presentation of the invention

The Task is solved by a flow converter according to claim 1. Advantageous embodiments The invention are the subject of the dependent claims.

One has inventive flow converter at least one rotor group drivable by a flow which in turn has at least one first rotor module. The flow causes the rotor module to rotate and the kinetic energy of the rotor module generated therefrom can be transformed into other forms of energy. The rotor group is arranged on a mast, with which the flow converter is positionable in the flow.

Of the flow converter according to the invention in particular a wind power converter, preferably a small wind power converter for domestic or small business use. Such small wind power converters can easily in residential area, in industrial areas or the like be set up.

Of the Small wind power converter according to the invention is preferred constructed according to the Savonius principle mentioned at the beginning, with which the rotors are essentially arranged vertically Axle are rotatable.

With regard to the geometric design of the rotor modules is on the previously unpublished DE 10 2008 044 807.9 referenced, the content of which is hereby fully referenced, in particular, as far as the structural design of the rotors is concerned.

According to the invention provided that the mast extends through the rotor group, wherein the rotor group is spaced from each other by at least two Positions of the mast is stored. This ensures that the force acting on the rotor module over more than one support point introduced into the mast, which is the load of bearing the rotor assembly considerably reduced.

One Another advantage is that no heavy and therefore sluggish flying while more is needed, the efficiency of the Device degrades. Instead, only the rotor group stored on the mast, resulting in a significant weight saving results. The at least one rotor module rotates about the rigid Mast without needing a separate wave. Leave it overall easier start-up and a considerably higher Achieve torque, which continues the efficiency of the wind turbine increases.

Thereby, that the mast can be designed as a continuous mast leaves Overall, a higher stability of the mast and thus reach the flow converter.

According to one Further development of the invention is provided that the rotor group has a second rotor module. The second rotor module is preferably rotationally fixed connected to the first rotor module. That way the inflatable surface and thus the performance increase the flow converter. The rotors are preferred the first rotor module and the second rotor module in the circumferential direction arranged offset to each other, which is a safe start a secures stationary rotor group with rising current.

According to one Another advantageous development of the invention is that at a lower end of the rotor group, a drive element for transmission the rotational movement of the rotor group is provided, whereby an energy converter of the energy of the rotational movement of the rotor group arrange in a lower region of the flow converter leaves.

The Drive element is preferably on a lower surface of the arranged first rotor module. That way you can with particularly simple means a rotationally fixed connection between Drive element and rotor group reach as well as the flow optimize the rotor group. Furthermore, the flow converter can be build up very compact in this way.

According to one Further development of the invention it is provided that the drive element annular is formed and facing the center of rotation of the drive element Having coupling means. The coupling means serve for coupling an energy converter and to transfer the energy the energy converter.

By the annular formation of the drive element and the Arrangement of the coupling means on the inside or outside In addition, the ring allows optimal transmission of the torque reach what the starting torque of the rotor group further reduced because those acting by the one or more energy converters Moments more easily overcome by the high torque of the drive element are.

One Another advantage arises when the or the energy converter eccentric are arranged to the rotor group. That way to provide a continuous mast, which has a higher stability. Furthermore, can be by the arrangement of the energy converter easily realize a translation that allows a drive of the energy converter in a suitable speed range, without having to provide a transmission.

About that addition, the eccentric arrangement of the energy converter allows that instead of an energy converter several energy converters provided can be at different positions below the flow converter are arranged and at different Tapping places on the drive element of the rotor group.

An energy converter may in particular be a power generator, a hydro heater and / or a pump, for example a water pump or a refrigeration unit. In this way it is possible to provide flow-force actuated devices which can serve different purposes but are constructed on the same platform. So can the flow converters according to the invention can be constructed particularly favorably by realizing the platform concept.

Especially Preferably, the rotor group is in an upper and in a lower End area stored. In this way, a turntable or tilting moment on the rotor group, as for example in gusty winds can occur, supporting the best possible.

According to one Further advantageous development is provided that the flow converter no housing surrounding the rotor group or none Rotor group has surrounding frame. Thus it can be achieved that the flow of the rotors of the rotor group not through a housing or a frame is disturbed, what would reduce the efficiency.

According to one Further advantageous development can be provided that the drive element has a drive chain or a sprocket, with which the movement of the rotor group to an energy converter is deliverable.

Further Objectives, features and advantageous applications The invention will become apparent from the following description of a Embodiment with reference to the drawings. Make up all described and / or illustrated Features in their meaningful combination the subject of the present Invention, also independent of the patent claims and their remittances.

Brief description of the figures

The Invention will be explained with reference to an embodiment. Here are shown schematically:

1 a perspective view of a flow converter according to the invention;

2 a sectional view of the flow converter according to 1 ;

3 the flow converter according to 2 along the cut surface CC;

4 an enlarged sectional view of a portion of the flow converter according to the invention;

5 a perspective view of a portion of a flow converter according to the invention in the region of the lower rotor module and the generator;

6 a detailed perspective view of the flow converter in the region of the connection between the rotor and generator.

embodiment

1 shows a schematic perspective view of a Windkraftkonverters invention 2 ,

The wind power converter 2 has a rotor group 4 with a first rotor module 6 and a second rotor module 8th on. The rotor modules 6 and 8th are arranged offset in the direction of rotation by about 90 ° to each other and rotatably connected to each other.

The rotor modules 6 . 8th are each formed in the embodiment chosen here as Savonius rotors and each have two preferably plate-shaped rotary parts 32 . 34 on, between which at least two blades are arranged, which are opposite a mast 10 arranged diametrically opposite and rotatable to the mast 10 are stored.

The blades of the respective rotor modules 6 . 8th are with the associated turned parts 32 . 34 preferably fixed, for example, connected by thermal joining method or by riveting.

The diametrically arranged blades of the rotor modules 6 . 8th are also aligned offset from one another, wherein in a plan view, the curvatures of the flow guide surfaces of the blades have in opposite directions.

How out 4 . 5 can be seen, is a sprocket 12 is at a lower level 14 or area of the first rotor module 6 appropriate. With the help of the sprocket 2 are in the embodiment chosen here two on the mast 10 fixed generators 18 drivable. The generators 18 are diametrically opposite to the mast 10 arranged.

The rotor group 4 is both at its upper end and at its lower end by means of ball bearings rotatably mounted on the mast 10 stored. In this way, emerging loads are taken up at two relatively widely spaced locations and into the mast 10 initiated. This increases the load capacity of the wind power converter according to the invention 2 considerably and also leads to a lower load on the bearings.

4 and 5 show an enlarged portion of the wind turbine converter 2 in the area of the lower rotor module 6 as well as the generators 18 ,

The at the lower surface or level 14 of the first rotor module 6 attached sprocket 12 has a toothing directed towards the center of rotation 16 on that with one on a drive shaft 20 of the generators 18 arranged gear 30 combs, as this particular 6 can be seen.

The generators 18 are arranged eccentrically. The size of the sprocket 12 and the size of the gears of the drive shafts 20 are coordinated so that the generators 18 be operated in an optimal speed range.

2 and 3 show a section through the wind power converter according to the invention 2 in 90 ° rotated cutting lines. The mast 10 can be one or two parts, with a first section 10.1 and a second section 10.2 , which are positively connected with each other. The upper section 10.2 the mast has a smaller diameter than the lower section 10.1 of the mast. This creates a necessary passageway in the rotor group 4 train with a smaller radius. In this way, the influence of the absorption on the flow can be improved. In the upper and in the lower part of the rotor group 4 are two camps 22 . 24 arranged.

The generators 18 are on a plate 26 assembled.

5 shows a perspective line representation of the area of the first rotor module 6 and the generators 18 ,

The dish 26 on which the generators 18 are arranged, is by means of three supports 28 on the mast 10 supported, reducing the stability of the plate 26 is significantly increased.

With the inward gearing 16 of the sprocket 12 comb the two gears 30 the drive shafts 20 of the generators 18 , By selecting the diameter of the sprocket 12 as well as the gears 30 can be set a gear ratio that the generators 18 are operable in each optimal speed range.

2

Wind power converters

4

rotor group

6

first rotor module

8th

second rotor module

10

mast

12

sprocket

14

lower Surface of the first rotor module

16

gearing

18

generator

20

drive shaft

22 24

camp

26

Plate

28

support

30

gear

32

turned part

34

turned part

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 4784568 [0002]
• US 4359311 [0002]
• - US 5494407 [0002]
• US 2007/0104582 A1 [0002]
• - DE 102008044807 [0015]

Claims (12)

Flow converter, in particular wind power converter ( 2 ) for domestic or small commercial use, with at least one rotor group drivable by a flow ( 4 ), which at least a first rotor module ( 6 ), wherein the rotor group ( 4 ) on a mast ( 10 ), characterized in that the mast ( 10 ) through the rotor group ( 4 ), wherein the rotor group ( 4 ) at at least two spaced-apart locations of the mast ( 10 ) is stored. Flow converter according to claim 1, characterized in that the rotor group ( 4 ) a second rotor module ( 8th ) having. Flow converter according to claim 1 or 2, characterized in that the rotor group ( 4 ) around the mast ( 10 ) is rotatably mounted. Flow converter according to one of the preceding claims, characterized in that at a lower end of the rotor group ( 4 ) a drive element ( 12 ) for transmitting a rotational movement of the rotor group ( 4 ) is provided. Flow converter according to claim 4, characterized in that the drive element ( 12 ) in the area of a lower level ( 14 ) of the first rotor module ( 6 ) is arranged. Flow converter according to claim 4 or 5, characterized in that the drive element ( 12 ) is annular and to the center of rotation of the drive element ( 12 ) pointing coupling agents ( 16 ) having. Flow converter according to one of the preceding claims, characterized in that at least one energy converter ( 18 ) provided by the rotor group ( 4 ) is drivable. Flow converter according to claim 7, characterized in that the energy converter ( 18 ) eccentric to the rotor group ( 4 ) is arranged. Flow converter according to claim 6 or 7, characterized in that the energy converter is a power generator ( 18 ), a hydraulic heater and / or a pump or a refrigeration unit. Flow converter according to one of claims 7 to 9, characterized in that at least two energy converters ( 18 ) are provided, which with the drive element ( 12 ) are coupled. Flow converter according to one of the preceding claims, characterized in that the flow converter ( 2 ) no the rotor group ( 4 ) surrounding housing or not the rotor group ( 4 ) has surrounding frame. Flow converter according to one of the preceding claims, characterized in that the rotor group ( 4 ) is mounted in an upper and in a lower end region.