RU2242637C1 - Counter-rotor windwheel-electric generator - Google Patents

Abstract

FIELD: wind-power engineering; electrical energy generation.

SUBSTANCE: proposed counter-rotor windwheel-electric generator has tower with swivel base and windward positioning device and bladed windwheels shaft-mounted on base; stator is disposed at bottom position of blades and the latter mount ferromagnetic plates crossing stator air gap; novelty is that low- and high-speed windwheels rotating in opposite directions are mounted on same shaft; high-speed wheel is disposed in front of slow-speed one in downwind direction and is provided with plates oriented against wind; low-speed wheel is provided with plates oriented upwind, and stator is placed between plates of these wheels.

EFFECT: enlarged range of wind velocities for normal operation of windwheel-electric generator.

1 cl, 3 dwg

Description

The invention relates to the field of wind energy and can be used to generate electricity.

A known design of the generator with the location on the tower of a rotary wind wheel equipped with a device for installation in the wind [1]. Also known is the design of a wind turbine with a friction clutch [2] to facilitate starting at low wind speeds.

These wind turbines have magnetic systems of generators of a traditional type.

Of the known analogues, the closest to the claimed combination of essential features is a wind generator [3], which contains a rotary wind wheel, a magnetic system with windings, in the gap of which the rotor moves, and the magnetic system (stator) is located on the base located in the zone of the lower position of the blades, and the blades are equipped with ferromagnetic gear plates making up the rotor, the rotor thus covers the ends of the blades, the plates pass through the air gap of the magnetic system.

The disadvantage of this wind generator is that it can only be used with any one type of wind wheel: low-speed (multi-blade with low speed and high starting torque) or high-speed (low-blade with low starting torque). This design significantly limits the functionality of the unit, since it is able to generate rated power only in a narrow range of wind speeds, but in reality, this range is quite wide and a situation may arise when long-term operation of a low-speed wheel is preferable to an effective but short-term operation of a high-speed wind wheel .

The invention is aimed at achieving enhanced functionality, in particular, ensuring the operation of a wind generator in a wide range of wind speeds.

This is achieved by the fact that in a counter-rotor wind generator containing a tower with a rotary base and a wind installation, wind wheels with blades are mounted on the base on the axis, a stator is located in the area of the lower position of the blades, ferromagnetic plates are installed on the blades passing through the stator air gap, according to the invention on one axis are fastened low-speed and high-speed wheels of opposite directions of rotation, and high-speed wheel is located in front of the low-speed in the direction of the wind and is provided with plates oriented in the wind wheel is provided with plates is slow, oriented into the wind, and is placed between the plates of a stator wheel.

The invention is illustrated in the drawing, where Fig. 1 shows a wind generator (side view), Fig. 2 is a front view, Fig. 3 shows a larger scale embodiment of a stator with upper and lower rotors in a position where the lower rotor bridges the poles, and the top one does not cross.

The counter-rotor wind generator includes a tower 1 with a lower bearing 2, an upper bearing 3, which are mounted on a rotary base 4, the device for installing in the wind 5 (tail blade) is fixed on the base, the axis 6 is fixed on the base, on which a low-speed wind wheel 7 is mounted in the bearing with ferromagnetic plates 8 and high-speed wheel 9 with ferromagnetic plates 10. A rod 11 is also attached to the base, at the lower end of which a stator 12 is located in the zone of the lower location of the blades. Figure 2 shows rohodnoe bladed wheel is slow and four-bladed wheel with blades of increased width. The stator includes a core 13, pole pieces 14, an excitation winding 15, a generator winding 16, the windings are equipped with terminals 17 that are connected to the load.

The counter-rotor wind generator operates as follows. When the air flow (from right to left, as shown in figure 1), the high-speed wheel is driven in a certain direction, for example, clockwise. Under the influence of the remaining wind energy, the slow-moving wheel 7 also comes into rotation, but in the opposite direction, since the high-speed wheel is located in front of the slow-moving in the direction of the wind. As can be seen in figure 1, the high-speed wheel is equipped with ferromagnetic plates oriented in the direction of the wind (inward from the wheel), and the low-speed wheel is equipped with plates oriented towards the wind, and a stator is placed between the plates. In the core 13 and the pole pieces 14 of the stator under the action of the magnetizing force of the winding 15 there is a magnetic flux which is switched by high-speed plates 10 (2 pieces as shown in Fig. 2) and slow-moving plates 8 (4 pieces). As a result, a voltage will be induced in the coil 16, which is then transmitted to the consumer.

The advantage of this counter-rotor wind generator is its wide functionality, which consists in the fact that it is able to capture the energy of both a low-potential wind flow - with a rotating wheel 7 and a stationary wheel 9, and a high-potential wind flow - with the rotation of both wind wheels.

Sources of information

1. Shefter Ya.I. Using wind power. - M .: Energoatomizdat, 1983, p. 109-110.

2. A.S. USSR No. 732572 / V.K.Alexandrov et al. - Wind turbine / publ. BI 17, 1980, F 03 D 3/30.

3. A.S. USSR No. 861716 / I.P. Kopylov and T.V. Lyadova. Gearless wind turbine / publ. BI 11, 1981, F 03 D 1/00.

Claims (1)

A counter-rotor wind generator containing a tower with a rotary base and a wind installation device, wind wheels with blades are mounted on the base on the axis, a stator is located in the area of the lower position of the blades, ferromagnetic plates are installed on the blades passing through the stator air gap, characterized in that on one axis the low-speed and high-speed wheels of opposite directions of rotation are strengthened, and the high-speed wheel is located in front of the low-speed one in the wind direction and is equipped with plates, oriented from the wind, the low-speed wheel is equipped with plates oriented towards the wind, and a stator is placed between the wheel plates.

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