SE533722C2 - Section for a support column for a vertical axle wind turbine and method for manufacturing such a support column - Google Patents

Description

From WO 2G08í153 489 it is previously known to optimize, from this point of view, the support column which supports the turbine of a vervalkalaxlat wind power assembly, by llllorrna it mainly in wood.

By thereby asking the conventional material, ie. steel for such a support column, a much higher load-bearing capacity is achieved for the same cost. alternatively the same bed capacity at a much lower cost compared to conventional design. The cheaper construction material also makes it possible to design the support column for the purpose entails more suitable design than otherwise.

The use of wood as a construction material in this context also brings benefits from an environmental point of view. With mainly vertically oriented wooden beams, the durability properties of the leather are utilized at the best-selling, and a stable construction is easy to achieve. Lirn beams are preferred because these years are more labor-labile and generally more suitable for building constructions.

It is described in the said WO 26081153 489 that the support column can be composed of a plurality of vertically distributed sections. In doing so, high strength health requirements are placed on the joints that connect the sections. The object of the present invention is to provide sections for a real axis wind turbine. which meet these requirements and to provide a procedure that meets these requirements.

Disclosure of the invention This object has been achieved from the first aspect of the invention by a section of the kind initially stated comprising the special features or the section at at least one end has a splice part, each splice part comprising an end portion of the readings and at least one splice component of polymers, which splice component comprises a longitudinally located lance directed transversely to the longitudinal section of the section and a learning anchoring part directed along the end portion which extends along the outside and / or inside of the end portion.

Thanks to the joint part reinforced with the joint grain component, a pipe connection of the sections can be achieved which is much safer in terms of strength than if the joint were to take place directly via the load area of the cells. The transverse lance allows stable attachment for fasteners, e.g. in the form of bolts, and laok each of the ear anchoring part, the cradle leaf guide to the wooden pocket can be distributed over a large area. This avoids significant dynamic punk loads directly on the wood material, which would otherwise entail a risk of breakage or similar damage, especially when the wood has aged in the exposed environment.

It is to be understood that the term "located at the end" refers to both the outermost at the end and slightly inwards from the end. , something that would be problematic in terms of weight if, for example, steel had been used instead.

The wooden frame is suitably built of wooden beams, preferably wooden beams.

The most favorable anchoring of the sham / component to the wooden frame is achieved if its anchoring part extends both on the outside and inside of the wooden frame. It is also advantageous to design the anchoring part unbroken all around the entire part of the wooden frame. In both cases, it contributes to an increased distribution of power consumption.

According to a preferred embodiment, the splice part comprises a single splice component. which extends uninterruptedly around the entire section.

Such an embodiment is simple to manufacture. Furthermore, it is firmly advantageous in this way to enable maximum distribution of the forces around the entire circumference. The unbroken dessutom end also in itself has a stimulating effect on the dressing. However, this does not exclude that under certain conditions it may be an alternative to instead have several splice components, each of which has a short extent in circumferential direction, and which are evenly distributed in circumferential direction.

For example. a splice component can be attached to either wooden beam or every other.

According to a further preferred embodiment, the polymer is ar reinforced.

Thanks to the good tensile strength property, the component can thus be made thinner and with less elongation than otherwise. The decoration is suitably gaseous, carbon- or intermediate.

According to a further preferred embodiment, the fl end is located at the outermost end.

It enables an uncomplicated seam joining of the sections and facilitates the attachment of the splice component to the wooden frame.

According to a further preferred embodiment, the flange is located a short distance in from the end. LG 20 30 533 722 4 This results in a more secure joining of the sections thanks to the fact that they can be pushed into a corresponding piece in each other. The joint thus has an increased shear strength.

By "a short distance from the end" is meant in the order of up to 1 m. A bulky interval is 15-5Û cm.

According to a further preferred embodiment, the end of the wooden frame has a smaller thickness than the rest of the wooden frame of the sections.

This reduces or eliminates the increase in the total wall thickness of the section at the joint which follows from the anchoring part of the polymer grain component.

The inner and / or outer surfaces of the bearing girder thus become smoother.

According to a further preferred embodiment, the thickness of the end portion decreases towards the end of the end portion and the total thickness of the anchoring part decreases from the end of the spirit portion.

The attachment of the anchoring part to the end portion of the wooden frame thus becomes particularly advantageous from the point of view of strength.

According to yet another preferred embodiment, the thickness reduction of the end portion is formed by a bevel on the inside of the end portion.

According to a further dry-drawn embodiment, the splice part has substantially the same thickness as the adjacent part of the rest of the section.

This means that the section has an even, smooth surface on both the outside and the inside, which reduces the risk of fracture indications at the Section's transition to the joint part and facilitates any surface coating of the section's walls.

According to a further preferred embodiment, the anchoring part occupies the larger part of the thickness of the joint part closest to the adjacent fin.

This results in a robust design of the polymer component in that it has a large thickness where the bending stresses are greatest.

According to a further preferred embodiment, the flange is inwardly directed.

Thus, the flange does not cause any increase in the Section's outer diameter.

It is also an advantage to avoid protrusions on the outside of the support column in this way.

The flange joint is also protected from weather and wind.

According to a further preferred embodiment, the edge is outward.

For outward accessibility reasons, outwardly directed rails can facilitate assembly and disassembly of the sections next to each other, especially with small wind turbines. 533 722 5 is of course also within the scope of arranging flange on both the outside and the inside.

In yet another preferred embodiment, the outside of the Section in cross section forms a polygon with 8-20 sides.

The Poiygon mold allows a simple and practical manufacturing method for the section. The optimal number of sides in the poiygon varies depending on the size of the wind turbine. In most cases, 1046 pages should be relevant, and especially 12 pages. Preferably, the polygon is equilateral.

According to a further preferred embodiment, the section has an outer io cross-sectional contour which decreases continuously from one joint part of the section to its other joint part.

It is often advantageous to design the support column with upwardly slimmer dimensions, which is underestimated by whether each section itself is tapered in this way. A section thus takes the form of a truncated pyrarid with a narrow apex angle and with a base shape depending on the side of the polygon.

According to a further preferred embodiment, each side of the polygon comprises a wooden beam with a trapezoidal cross-section.

The wooden beam constitutes a suitable construction material in this context and is compulsorily of the type of wooden beams. With trapezoidal cross-section, the joining of the wooden beams to one section is facilitated. On the other hand, the cross-sections of the wooden beams are uniform and equal in size. Compulsory learning, each trapezoidal shape is isosceles.

The invention also relates to a support pillar which comprises a plurality of sections according to the invention, which sections are fastened to each other by means of the fins.

Furthermore, the invention relates to a wind power unit with a vertical turbine shaft 25 and provided with a support pillar according to the invention.

The preferred embodiments set forth above are set out in the claims dependent on claim 1. It is to be understood that further preferred embodiments may, of course, be made up of any conceivable combinations of the above-mentioned preferred embodiments. so Since a section is provided with a splice part both at its upper and at its lower end, the two splice parts need not be of identical type. For example, the splice portion at the lower end of the section may have its fins some distance in from the end while the splice portion at the upper end of the section has its lance at the outermost end.

From the second aspect of the invention, the arising object has been obtained in that a method of the type indicated comprises the special measures that a splice component of polymers is applied at each end of the respective section to be joined to an end portion of the section of the section of the section. a joint which comprises a flange across the longitudinal direction of the Section and is applied to said end portion with an anchoring portion extending along the outside and inside of the end portion.

According to preferred embodiments of the inventive method, it is practiced using sections of the present invention, especially according to any of the preferred embodiments thereof.

The invented support column, the invented wind power unit and the invented method entail advantages of the corresponding siag as the hoisted invention section and the preferred embodiments thereof, and as described above.

Inventions: explained in more detail by the following detailed description of embodiments thereof and with reference to the accompanying drawings.

Brief description of the figures F1g, 1 is a side view of a wind power unit according to the invention.

Fig. 2 is a section through a section of the support column at the wind power unit according to Fig. I.

Fig. 3 is a section through a portion of Fig. 2.

Figs. 4-8 are sections corresponding to Fig. 3, but show alternative embodiments.

Fig. 9 is a section along the line iX-1X in color. 2.

Fig. 0 is a section corresponding to that of Fig. 9, but showing an alternative embodiment.

Fig. It is a side view of a detail of tig. 9.

Fig. 12 is a section corresponding to that of Fig. 3, but further shows an alternative embodiment. P9 LI: 30 533 722 Description of exemplary embodiments Fig. 1 illustrates in a schematic side view a wind power unit according to the invention. The wind turbine 2 is of so-called. The H-rotor type with a vertical turbine shaft 3 connected to vertical turbine blades 6 via step 5. The turbine shaft 3 is rotatably connected to the unit shaft 4, which drives the generator S arranged on a foundation 7 arranged on the ground. .

The turbine is supported by a stretcher column 1 in which the unit shaft 4 and the turbine shaft 3 are axially and radially bearing. The stretcher column 1 is composed of a number of sections 11a-11d, in the example shown four pieces. The number of sections may be more or less depending on the size of the unit. The sections are connected to each other in a manner described in more detail below. The stretcher in the example shown is slightly tapered upwards and thus has a pyramid shape or a cone shape. It should be understood, however, that the invention is suitable even when the support column has a constant width.

Fig. 2 is a section through a section 11 of the support column 1 in fig. The section 11 is composed of vertical glulam beams 12 which are attached to each other to form a polygon or a circle. At the top and nadtiii the section has an inwardly directed ns end 13 to be connected to the adjacent section, e.g. through bolted joints.

The tig. For this purpose, the upper section ten needs to have a fixture only at its lower end, but there is nothing to prevent a fixture in its own right also at its upper end. Sections 11b and 11 :: have fins at both ends.

The lower section 11d also has the fl end at both ends, where the lower flange can be used for anchoring the support column 1 to the foundation 7. This can in itself be done in another way, whereby its lower end is not necessary.

Fig. 3 illustrates in detail how the ridge 13 at the lower end of a section is connected to the wooden beams 12 of the section. The ridge 13 forms a de! of a splice component 14 in fi reinforced polymer and is inward. The splice component 14 has an anchoring part 15 which extends a distance up along the inside of the wooden beams 12. In the area of the anchoring part 15 the wooden beams 12 are provided with a chamfer 17 so that space is provided for the anchoring part 15. The wall thickness of the section is thus the same in the area at the rest of the section. The splice component 14 and that of the section located in the area of the anchoring part together constitute the splice section of the section. in the flange 13, holes 16 are provided for bolts.

In the example according to fi g. 4, the anchoring day 15 of the splice component 14 is located on the outside of the wooden beams and the wooden beams 12 have a chamfer 17b at the outside.

Fig. 5 shows an example where the anchoring part of the splice component 14 has both an inner 15a as an outer išb part and the wooden beams have a bearing on both the inside 17a and the outside iïb.

Fig. 6 shows an example similar to the one shown in Fig. 3, but differs from this in that the wooden beams 12i have some reduction in the thickness at the joint part.

The anchoring day of the splice component 14 therefore means that the wall thickness of the section is greater at the splice part than at the rest of the section and the thickness tilts in the direction of the flange.

In the embodiment according to fig. 7, the flange 13k is located so that the outside of the section and the anchoring part of the splice component 14 are located on the outside.

Fig. 8 shows a joint part corresponding to that of Fig. 3, but differs from that shown in that example in that the section along its length is coated with a surface layer of polymer, which may be of the same material as that in the joint component 14 or alternatively of another polymeric material. A matte-like coating can be laced even on the inside so the eagle is the fafia in the example shown.

The splice components 14 can be applied to the wood bar by casting around each end, and are retained there by their own adhesion ability and the form locking created when the sections are spliced. For improved holding between the threshing core and the splice grain component, additional fastening means can be applied, e.g. an adhesive layer them between eiier screws.

A shaving component can be applied to each end of each lumber 12 before joining them to a section. Alternatively, application of the splice component components can be made to the joined section.

The flange at the upper end of each section is designed and anchored in a corresponding manner as described for the flange at its lower end.

Fig. 9 shows an example of a sectional shape of a section. In this fail, the section is composed of twelve glulam beams 12, each of which has a trapezoidal cross-sectional area, and are glued together along the inclined side surfaces. For one of the glulam beams, it has also been drawn out how it is glued together by a fl erlai wooden beams that have been glued together.

Fig. 16 shows an alternative example where the wooden beam construction has a circular cross-section.

Flg. 'l shows a side view from the outside of one of the glulam beams in fi g. 9 and illustrates an example where the beams are slightly trapezoidal in shape also in the longitudinal direction to taper upwards in adaptation to the taper of the support column upwards.

Fig. 12 shows an alternative embodiment of the joint part, where the end 13c is located on a piece from the end of the section. š in this case the flange is on the outside but a corresponding design can be applied alternatively on the inside of the glulam beam.

The anchoring part of the splice component 14 in this case consists of an upwardly directed part 15c and a downwardly directed part of the solder. The downwardly directed portion connects to an end cap 15e.

The example enššgt fi g. 12 can alternatively be designed so that a de! of the anchoring dough attaches to the inside and connects to the end coating 15e.

Compare fi g. 5.

Claims (19)

20 25 30 533 722 10 PATENT REQUIREMENTS Section (11) of a support column for a vertical axis wind turbine (2), which section (11) is hollow and elongate and comprises a wooden frame substantially of wood, characterized in that the section at at least one end has a joint part, each joint part comprising an end portion of the wooden frame and at least one splice component (14) of polymer, said splice component (14) comprising a longitudinal direction of the end (13, 13b, 13c) located transversely to the longitudinal section (11) and an anchoring part (15, 15a) directed along the end portion , 15b, 15c, 15d) extending along the outside and / or inside of the end portion. Section according to claim 1, characterized in that the splice part comprises a single splice component (14) which extends uninterrupted around the entire section (11). Section according to Claim 1 or 2, characterized in that the polymer is fi reinforced. Section according to one of Claims 1 to 3, characterized in that the ends 13, 13b, 13c) are located at the outermost end. Section according to one of Claims 1 to 3, characterized in that the shaft 13, 13b, 13c) is located a short distance in from the end. Section according to claim 4 or 5, characterized in that said end portion has a smaller thickness than the rest of the wooden frame of the section, at least along a part of the end portion. Section according to claim 6, characterized in that the thickness of the end portion decreases towards the end of the end portion, and that the total thickness of the anchoring part (15, 15a, 15b) decreases in the direction from the flange (13, 13b). 20 25 30 533 722 11 Section according to claim 7, characterized in that the thickness reduction of the end portion is formed by at least one bevel (17, 17a, 17b) on the inside of the end portion. Section according to one of Claims 4 to 8, characterized in that the joint part has substantially the same thickness as the adjacent part of the rest of the section (11). Section according to one of Claims 4 to 9, characterized in that the anchoring part occupies the greater part of the thickness of the joint part closest to the end (13, 13b, 13c). Section according to one of Claims 4 to 10, characterized in that the edge (13) is inwardly directed. Section according to one of Claims 4 to 10, characterized in that the flange (13b, 130) is directed outwards. Section according to one of Claims 11 to 12, characterized in that the outside of the section (11) forms a polygon with 8-20 sides in cross section. Section (11) according to any one of claims 11-13, characterized in that the section (11) has an outer contour which decreases continuously from one joint part of the section (11) to its other joint part. Section according to claim 13 or 14, characterized in that each side of the polygon comprises a wooden beam (12) with a trapezoidal cross-section. Support column (1) for a vertical axis wind turbine, characterized in that the support column comprises a number of sections (11a-1 1d) according to any one of claims 1-15, which sections (11a-11d) are fastened to each other by means of said fl ends (13, 13b). 533 722 12 Wind turbine unit with vertical turbine shaft, characterized in that the wind power unit comprises a support column (1) according to claim 16. A method of manufacturing a support pillar for a vertical axis wind turbine, comprising plurality of axially elongated a plurality of hollow elongate sections, each of which comprises a wooden body consisting essentially of wood, characterized in that a splice component of polymer is applied at each end of each section to together with an end portion of the wooden frame of the section form a splice part, which splice component comprises a flange across the longitudinal direction of the section and is applied to said end portion with an anchoring part extending along the outside and / or inside of the end portion. Method according to claim 18, characterized in that it is practiced using sections of the type specified in any of claims 1-15.