SK2082023U1 - Trough wind turbine - Google Patents

Abstract

A trough wind turbine contains a set of rotors (1) on an almost vertical shaft attached to a rear beam (3) reinforced with the ropes (7). A hook (10) carries the front profile (15). The lower side hook (8) and the upper side hook (4) carry the side rails (5), which create an acceleration trough and, by rotating around a leading edge (6) during excessive wind, remove the strain of the rotors (1). The system is rotatable on the vertical axis (11) in a column (12). The front profile (15) uses buoyancy and weight to direct the resultant of the forces to the foot of the column, making the system foundation less, gearless, without regulatory mechanisms and without load and heavy sheets.

Description

The field of technology

The technical solution refers to wind energy systems designed for wider use due to technological and economic effects.

Current state of the art

Current design solutions use rotors with a horizontal or vertical axis. Shares of investment costs are mainly the application of components in the following order:

- regulatory and safety mechanisms share 0.3

- rotor blades 0.2

- foundations and mast 0.2

- generator with a gear ratio of 0.15

- others 0.15

The high weight given by the foundations and mast makes it difficult to use in difficult terrain and in water.

The essence of the technical solution

The essence of the solution is a trough wind turbine, the rotors of which are arranged on a shaft with a tilt of its axis in the direction of the wind in a value of about 20 degrees, the bearings of which are fixed on spacers on the rear beam. In the lower part of the beam there is a fixed fork with a vertical axis rotating in the column. The crossbar holds the generator. On the fork in the front there is a profile whose negative lift and weight create a vector sum of forces together with the aerodynamic forces of the sidewalls directed near the foot of the column. The lower side fork and the upper side fork carry the side rails in the leading edge. The drain edges are fixed on flexible pullers. The ropes reinforce the fork and rear beam. The axis in the heel of the fork is rotatable in the post. The transom on the fork carries the generator.

Overview of images on drawings

In fig. 1 is a side view of the inner surfaces of the sidewalls and the turbine

In fig. 2 is a top view of all components

Implementation examples

A small to medium-sized roof wind turbine for suitable objects with production operation is pushed with its vertically directed axis 11 on the fork 10 into the post 12 fixed on the roof in any way. The sidewalls 5 are swingably attached to the leading edge of the following sidewall 5 by their leading edges, so that a vent is created between two sidewalls 5. The force from the buoyancy of the sidewalls 5 is reduced in the direction of the wind to the axial projection of the vector A. The buoyant force of the profile 15 and its weight create a resultant force F pointing near the foot of the pillar 12. The ropes 7 reinforce the rear beam 3, in front of which the spacers 2 hold the shaft with the rotors 1, at the bottom of which is the generator 9. The elastic tensioners 13 maintain the angle of attack of the sidewalls 5 with pretension. Excessive wind overcomes the force of the pretension and the sidewalls open to wind direction. Direction into the wind is given by the excess area of the sidewalls 5 behind the axis 11. The generator 9 is fixed on the crossbar 14. The sidewalls 5 are made of a light hollow surface or rib-reinforced canvas of low weight and cost. Expenditure components such as - regulatory and protective mechanisms, gearbox, large-diameter sheets and tower with foundations - the system does not contain on the basis of the above.

The low weight allows the construction of high-performance units in the mountains and in the seas. The function of such units is similar to the previous case. A higher share of the benefits accrues to column 12 and the foundations, which currently weigh approx. 5,000 t for the 5 MW unit, while in the described case this component - a hole drilled into the rock, a steel pipe approx. 0,200 x 2 m and the rear beam 3 reinforced with ropes 7 .

In the sea, the difficulty of floating buoys decreases (low moment of force, low weight).

Claims (1)

A trough wind turbine, characterized by the fact that the rotors (1) are arranged on a shaft whose inclination to the vertical is 15 to 20 degrees on a parallel rear beam (3) by means of spacers 5 (2), while on the rear beam (3) is fixed a fork (10) with a front profile (15), above which there are sidewalls (5) bounded from below by the lower sidewall fork (8) and from above by the upper sidewall fork (4), for holding the sidewalls (5) on the drain edges of which there are elastic pullers ( 13), while the rear beam (3) is reinforced with ropes (7) from the end of the fork (10), which in its heel contains an axis (11) rotatably mounted in the column (12); the generator (9) on the bottom of the shaft is fixed by a crossbar (14).