DE102010008639A1 - Mounting construction for tower installation of wind turbines, has component structure, on which vertical load acts, where tensile forces acting on component structure are removed by bendable traction elements - Google Patents

Abstract

The mounting construction has a component structure (14), on which a vertical load acts, where the vertical load is caused by the weight and movement load. The tensile forces acting on the component structure are removed by bendable traction elements designed as tension cables or tension rods. The traction elements are attached to flanges (2) of tower segments.

Description

• • Ein Leitersystem welches von unten bis oben reicht, mit dazugehöriger Absturzsicherung.
• • Plattformen unter jedem Turmflansch, die zur Montage und Wartung der Flanschverbindungen nötig sind. Sie dienen auch als Ruheplattform während des Aufstiegs.
• • Eine Bodenplattform mit Türbereich auf welcher auch die nötigen Schaltschränke positioniert werden.
• • Kabelführung, Beleuchtung und Spannungsversorgung sind ebenfalls vorzusehen.
• • Optional kann ein Aufzugssystem zur Aufstiegserleichterung vorhanden sein.

The invention relates to the mounting structure of the tower installations of wind turbines with steel towers. Steel towers of wind turbines are designed in longitudinal segments. This is necessary for transport and installation reasons. The segments have a length of approx. 25-30 m and usually contain the following installations:

• • A ladder system which extends from bottom to top, with associated fall protection.
• • Platforms under each tower flange required for mounting and maintaining the flange connections. They also serve as a resting platform during the ascent.
• • A floor platform with door area on which also the necessary control cabinets are positioned.
• • Cable routing, lighting and power supply must also be provided.
• • Optionally there may be an elevator system to facilitate climbing.

These installations are now almost all attached to the tower shell. For this purpose, threaded sleeves are usually welded to the tower wall, to which then the internals described above are attached. From a calculation point of view, this is unfavorable, since the tower design must then be based on a higher notch class, based on the undisturbed tower shell. As a result, a high notch class leads to higher wall thicknesses of the tower wall and thus to higher weight and costs. Desirable is therefore a construction that eliminates weld-on parts on the tower wall.

In US 2009/0031668-A1 , a simple bridging of the tower wall from flange to flange by means of solid support structures is proposed. This is unfavorable, as it is associated with an impermissible stiffening of the tower in the massive support structure.

In US 2003 1477 53-A1 If an attachment of the internals by means of magnets is proposed, this seems expensive. With regard to the adhesive force of the magnets is to be considered that the tower wall is not processed and painted and thus the adhesive force of the magnetic connections is quite uncertain to calculate.

Purpose and advantages of the invention

The object of the invention is to develop a construction for fixing the internals, which dispense with any Anschweißteile on the tower wall, the tower is not inadmissible, z. B. stiffened by massive support and safely removes the loads occurring. In addition, the construction must be so cost-effective that the expected savings by reducing the wall thickness remains a positive financial effect.

This object is achieved according to claim 1 according to the invention in that the vertical forces and all tensile forces on the internals purely via tension elements ( 8th ), such as tie rods or ropes, which are attached to the flanges ( 2 ) are removed, be removed. The horizontal forces are transmitted via pressure supports ( 9 . 9.2 ) to the tower wall ( 3 ) down, z. B. by a horizontal tripod in a support plane ( 15 ). These pressure supports ( 9 . 9.2 ) have no material connection to the tower wall ( 3 ) but act only on pressure and friction. The forces occurring on the tower wall ( 3 ) are not critical. 1a and 1b show the corresponding embodiment on the example of a long-built tower installation ( 14 ) as the ladder system ( 4 ). 7a show the corresponding design using the example of the connection of a platform ( 7 ).

A useful embodiment according to claim 2, the implementation of tension elements ( 8th ) such as traction ropes or tie rods through the structure of long tower structures ( 14 ), such. B. the spars of the conductor systems ( 4 ). This allows standard conductor segments ( 5 ) z. B. by means of short connecting sleeves ( 6 ) to the length of the corresponding tower segment ( 1 ) to a ladder system ( 4 ) are assembled and braced so that all occurring vertical loads of the tension elements ( 8th ) to the overlying flange ( 2 ), the attachment point of the mendicant ( 8th ), be removed. The ladder struts and especially the conductor element joints thus experience only compressive and bending forces. 2 shows the corresponding embodiment.

A useful embodiment according to claim 3 provides the combination of pressure supports ( 9 ) and rope stiffeners ( 10 ) to avoid undue deflection of long-building elements ( 14 ) as the ladder system ( 4 ). This makes it possible to one or more pressure support ( 9.1 ) in the horizontal support planes ( 15 ) and so room in the tower interior for z. B. vorzuhalten an additional elevator. 3 shows the corresponding embodiment.

A useful embodiment according to claim 4 provide the additional supports the rope stiffening ( 10 ) of the ladder system ( 4 ) by a pressure support ( 9.1 ) over the length. As a result, the stiffening effect of the stiffening rope ( 10.1 ) at a low length of the pressure rods ( 10.2 ) are maintained over long lengths. 4 shows the corresponding embodiment.

A useful embodiment according to claim 5 provides the over the boom joint ( 13.1 ) articulated, on the tower wall by elastomeric elements ( 12 ) and possibly additional spring elements ( 11.1 ) elastically supported, load introduction by the boom ( 13 ) in the flanges ( 2 ). This will further decouple long-built tower 14 ) such. B. of the conductor system ( 4 ) reached by the existing tower vibrations and so both the tower but primarily relieves the ladder system. 5 and 6 show the corresponding embodiment.

A useful embodiment according to claim 6 provides the provision of adjustable spring elements ( 11 ) in the tension elements ( 8th ). As a result, any overloading of the tension elements ( 8th ) and their connections to the flanges ( 2 ) are prevented and the necessary bias voltage can be adjusted. As spring elements ( 11 ) can be used, for example, tension springs, compression springs or cup spring packs or pneumatic springs. 2 shows the corresponding embodiment.

A useful embodiment according to claim 7 is the introduction of elastomeric elements ( 12 ) as rubber buffer at the contact point pressure support ( 9 ) Tower wall ( 3 ). As a result, a certain spring effect is achieved, thus ensuring the prestressing safety. Any tower deformations during operation can thus be compensated. 1b shows the corresponding embodiment.

A useful embodiment according to claim 8 is the introduction of adjustable spring elements ( 11.2 ) such as compression springs or disc springs in the pressure supports ( 9 ). Thus, the resilient effect can be extended over much larger areas based on the solution described in claim 7 and also better adjust with respect to the contact pressure. 1c shows the corresponding embodiment.

drawings

Several embodiments of the invention are illustrated in the drawings and will be explained below with further details and advantages.

Show it

1a a schematic representation of the attachment structure of long-building tower installations such as a ladder system ( 4 ), in which case the ladder stiles themselves are used as tension elements ( 8th ), which on the flange ( 2 ) and the pressure supports ( 9 ) the horizontal forces on the tower wall ( 3 ) transfer.

1b a section through the tower segment ( 1 ) with ladder system ( 4 ) and three pressure supports ( 9 ) on the tower wall ( 3 ) with decoupling by elastomer elements ( 12 ) Act.

1c Pressure supports ( 9 ) of a ladder system ( 4 ) with spring elements ( 11 ) to the tower wall ( 3 ).

2 a schematic representation of the attachment structure of long-building tower installations ( 14 ) like a ladder system ( 4 ), with tension elements ( 8th ), which on the flange ( 2 ), are guided by the ladder stiles. The tension elements are at the lower end with spring elements ( 11 ) Mistake. The the ladder system ( 4 ) forming standard ladder segments ( 5 ) are by means of connecting sleeves ( 6 ) centered on each other. The pressure supports ( 9 ) transfer the horizontal forces to the tower wall ( 3 ).

3 a combination of pressure support ( 9 ) and rope stiffening ( 10 ) with stiffening rope 10.1 and push rods 10.2 ,

4 the division of the rope reinforcement ( 10 ) in two equal lengths, accomplished by the introduced pressure support ( 9.1 ).

5 the suspension of a long-built tower installation on the boom ( 13 ) hinged to the flange via boom joint ( 13.1 ) and is connected via an elastomer element ( 12 ) on the tower wall ( 3 ) is supported.

6 the suspension as in 5 but with upstream spring element ( 11.1 ) on the wall support

7a the connection of a platform ( 7 ), where, on the flange ( 2 ) fastened tension elements ( 8th ) derive the vertical forces, the pressure support ( 9.2 ) in conjunction with the elastomeric element ( 12 ) the horizontal forces on the tower wall ( 3 ).

7b one on the flange ( 2 ) openwork plan view of the platform ( 7 ) with pressure support ( 9.1 ) and elastomeric element ( 12 ).

8th the main elements of the mounting structure in isometric view.

LIST OF REFERENCE NUMBERS

1

tower segment

2

tower flange

3

tower wall

4

conductor system

5

Standard conductor segment

6

centering

7

platform

8th

Tension elements (ropes, tension rods)

9

pressure support

9.1

pressure support

9.2

pressure support

10

rope stiffening

10.1

stiffening wire

10.2

spacer

11

Spring element, also adjustable in relation to the required preload

11.1

Spring element, also adjustable in relation to the required preload

11.2

Spring element, also adjustable in relation to the required preload

12

Elastomeric element (e.g. rubber buffer)

13

boom

13.1

boom joint

14

long-built tower installations, such as ladder systems, cable guides

15

support level

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2009/0031668-A1 [0003]
• US 2003147753 A1 [0004]

Claims (8)

Mounting structure for tower installations of wind turbines with steel towers, characterized in that the vertical loads acting on the internals, z. B. caused by dead weight and traffic load, as well as all tensile forces to be removed by bending soft tension elements ( 8th ) such as pull ropes or tie rods which are attached to the flanges ( 2 ) of the tower segments ( 1 ) and intercept the horizontal loads by pressure supports ( 9 . 9.2 ) to the tower wall ( 3 ), whereby the structural integrity of the tower wall ( 3 ) will in no way be adversely affected by welded parts or holes and the horizontal pressure supports ( 9 . 9.2 ) only pressure and friction forces on the tower wall ( 3 ) cause. Fastening construction according to claim 1, characterized in that tension elements ( 8th ) are guided through the ladder stiles and thus standard ladder segments ( 5 ) z. B. by means of short centering sleeves ( 6 ) can be assembled to the desired tower segment length, wherein the ladder stiles and the connecting centering sleeves ( 6 ) are only under pressure and bending stress and all tensile forces on the ropes ( 8th ) are derived to the next upper flange. Fastening structure according to one of the preceding claims, characterized in that to prevent undue deflection of long-building tower installations ( 14 ) as the ladder system a combination of pressure support ( 9 ) to the tower wall ( 3 ) and rope stiffening ( 10 ), which allows one or more pressure supports ( 9 ) per support level ( 15 ) and thus keep room inside the tower for additional installations such as elevator. Fastening construction according to one of the preceding claims, characterized in that the rope reinforcement ( 10 ) long-built tower installations ( 14 ) by one or more pressure supports ( 9.1 ) is divided into correspondingly shorter segments and so the stiffening effect of the stiffening rope ( 10.1 ) at low projection of the pressure rods ( 10.2 ) can be maintained over long lengths. Fastening structure according to one of the preceding claims, characterized in that the load introduction into the flanges ( 2 ) by the boom ( 13 ) hinged by the boom joint ( 13.1 ) is mounted and at the tower wall ( 3 ) elastically by means of elastomeric elements ( 12 ) and / or with additional adjustable spring elements ( 11.1 ) as compression springs or cup spring packs supported, creating a certain elasticity between the tower shell and long-building tower installations ( 14 ), as ladders is given. Fastening construction according to one of the preceding claims, characterized in that the tension elements ( 8th ) with also adjustable spring elements ( 11 ) such as tension, pressure, disc springs or pneumatic springs are provided so as to overload the tension elements ( 8th ) and to be able to set the desired preload. Fastening construction according to one of the preceding claims, characterized in that at the contact point pressure support ( 9 ) - tower wall ( 3 ) an elastomeric element ( 12 ) such as a rubber buffer is used, whereby a certain spring action is achieved and thus the necessary bias of the pressure support ( 9 ) to the tower wall ( 3 ) can be ensured with higher security. Fastening construction according to one of the preceding claims, characterized in that the pressure supports ( 9 ) with adjustable spring elements ( 11.2 ) are provided as compression springs or disc springs, whereby the pressure contact of the pressure support ( 9 ) to the tower wall ( 3 ) is adjustable and even with larger deformations of the tower wall ( 3 ) can be maintained.

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