RU103856U1 - WIND-POWER MODULAR INSTALLATION OF THE COMBINED TYPE WITH APPLICATION OF MOLECULAR STORAGE OF ENERGY AND MAGNETIC BEARINGS - Google Patents

Abstract

 1. A combined-type wind power installation that converts the horizontal movement of the air flow into rotational motion of the rotor to produce electrical or mechanical energy from the kinetic energy of the flow and accumulates the energy received to provide uninterrupted power to consumers, including a battery of batteries using molecular energy storage, one or more unified modules located coaxially on a common support in the form of a rotor held by magnetic bearings, consisting of a plurality of circularly arranged blades of constant thickness or having a horizontal section in the shape of a wing, mounted vertically, curved to the side of rotation, rigidly fixed or equipped with a mechanism for changing the angle of attack, an electric current generator, an impeller guide consisting of many blades, flat or curved, mounted vertically at a certain angle to the radius, designed to increase the flow rate of the medium through the rotor and screen the parts of the rotor , Flow pressure which generates braking torque, and the carrier function of the power frame for installation in the rotor therein and build additional modules. ! 2. Installation according to claim 1, characterized in that the design uses an electric current generator consisting of a stator with a three-phase winding system and a rectifier fixed to it, a rotor with permanent rare-earth magnets, using magnetically impervious materials to concentrate the magnetic flux crossing the stator windings . ! 3. Installation according to claim 1, about

Description

The technical field to which the utility model relates.

The proposed utility model of a combined-type wind power installation using molecular energy storage devices (MNEs) and magnetic bearings is a renewable energy source (RES) and is reassigned for year-round uninterrupted use in individual farms and various autonomous power supply systems for special purposes.

Brief Description of the Drawings

The device of the unified module is presented in figure 1.

Designations to Figure 1:

1 - wind turbine rotor;

2 - rotor blades;

3 - fixed external guide.

Figure 2 schematically shows a General view of a wind turbine.

Designations to Figure 2:

1 - bearing support of the installation;

2, 3, 4 - unified modules.

Figure 3 presents a schematic diagram of the electrical part of the wind turbine.

Figure 4 presents a diagram of the switching modes of the generator.

Designations to Figure 4:

G - generator;

U1, U2 - respectively, the beginning and end of the first winding;

V1, V2 - respectively, the beginning and end of the second winding;

W1, W2 - respectively, the beginning and end of the third winding;

K1, K2 - switches controlled by the controller;

A, B, C are the output phases of the electric circuit.

State of the art

The model uses a vertical-axis wind turbine (Figure 1) with increased efficiency, due to the use of a fixed external guide (3), which eliminates the torque of aerodynamic forces in the direction opposite to the working direction of rotation of the rotor (1), and also increases the wind speed in the zone the action of the rotor, while simultaneously performing the role of the power frame of the module. There are many (RU2006669; RU 2006662) vertical-axis devices (Savonius rotors, Darier rotors, their derivatives and modifications, etc.), but they all use either the moment of rotation arising from the difference in the drag coefficients of the blades when they are rotated against or against him, or the moment of rotation that occurs when flowing around blades having a wing shape in cross section. In both of these principles, there is a torque directed back to the main direction (negative torque, which reduces efficiency). Structures designed to direct and accelerate the air flow are also known, but they either do not shield the rotor elements when a negative torque flows around them, or they work on the principle of a wind vane, turning in the direction of flow, which neutralizes the main advantages of vertical-axis devices - no the need for orientation and disposal of flow gusts from any direction.

Utility Model Disclosure

The proposed device of the wind turbine module (Figure 1) allows the simultaneous use of torques:

1) the pressure of the incident flow on the blade (2) of the rotor (1) at the greatest angles of attack;

2) from the lifting force arising from the flow around the rotor blades at the smallest angles of attack.

The rotor is equipped with a mechanism for changing the angle of attack of the blades to orient them in the stream.

The proposed utility model solves a number of problems:

- increase the life of the main wear elements;

- increase in MTBF / increase system reliability;

- improving the environmental safety of the installation;

- increasing the energy efficiency of the medium;

The technical result is to reduce the cost of generated energy.

The use of an external guide of the static impeller (FIG. 1) allows to increase the flow rate in the working area of the wind turbine and thus increase the efficiency of the rotor, taking into account the increase in the total area swept away by the flow. At the same time, the guiding impeller acts as a power frame, allowing the modules to be interconnected, shields most of the ultrasonic vibrations that occur on the edges of the rotor blades from flow stall, and also due to the absence of through gaps, prevents the flickering shadow from the rotating rotor - one of the obstacles to placing wind turbines near person's place of residence.

The use of magnetic bearings as supports for rotating parts allows to increase the maintenance-free period and the life of the mechanical part of the installation due to the absence of progressive mechanical damage during operation. At the same time, the use of magnetic bearings reduces the accuracy requirements for installing the rotor, reducing the cost of production. The absence of mechanical contact reduces the noise during operation of the installation and, therefore, reduces noise pollution.

In the absence of wind (speed less than 1.5 m / s) and the presence of solar radiation, the batteries are charged by photovoltaic solar panels (SB), preventing a deep discharge of batteries.

The use of the MNE of the farad range (PATENT No. 2182383) allows to reduce the required energy consumption of rechargeable batteries (AB) and extend their service life by 2–3 times due to damping of pulse loads. A particularly important condition for this is the uninterruptible power supply of responsible consumers.

MNE is a "supercapacitor" with a lower internal resistance and a greater instantaneous energy transfer than a battery, as a result of which it takes on peak loads, protecting the battery from a deep discharge and exceeding the permissible maximum current. Thus, to power devices of increased energy intensity (for example, increased currents at the starting modes of three-phase electric motors) when using MNE and SB, a lower capacity battery can be used.

To increase the maintenance-free life of the generator, a brushless three-phase generator with excitation from permanent rare-earth “strong” magnets is used. In the production of three-phase electric machines, two main schemes for connecting the phases of the windings are used - the "star" and the "triangle". With equal power applied to the generator shaft, the stator connected according to the "triangle" circuit produces a higher current, but with a lower voltage, and the stator connected by the "star" circuit produces a lower current, but a higher voltage . Considering that the range of charging voltages is limited by the characteristics of the AB, when connected according to the "star" scheme, the AB charge will begin at lower revolutions of the generator shaft, when the voltage generated by the generator reaches the lower limit of the charging range of the AB voltages. Thus, the application of the scheme for switching the generator windings from the "star" to the "triangle" allows you to expand the range of operating revolutions of the wind turbine.

The claimed technical result is achieved by the fact that the design used: a fixed external guide that increases the efficiency of the rotor of the wind turbine module, MNE, magnetic bearings, a generator using materials that shield the magnetic field, equipped with a switching mechanism for connecting star-delta windings .

Utility Model Implementation

The device of the unified module in a static state is presented in figure 1.

During operation, a fixed external guide concentrates the flow in the working area, increasing the flow rate in the working area (in accordance with Bernoulli's law) by compressing the jet, while simultaneously deflecting the jet towards that part of the blades, the flow of which at the moment gives useful torque. The module rotor rotates under the action of aerodynamic forces, taking part of the energy from the stream and transmits torque to the generator shaft.

The principle of operation of the electrical part of the proposed utility model is presented in Fig.3. The generator converts the energy of rotation of the shaft into alternating electric current, which is then converted into direct current by means of a rectifier and accumulated in the battery. The charge controller, in the absence of wind, monitors the charging process and the state of the battery, using the energy from the battery. Also, the controller, depending on the voltage generated by the generator, switches the connection circuit of its windings "star" - "triangle". The consumer uses the energy stored in the battery through an inverter, which converts direct voltage to alternating voltage of a household network. When you turn on energy-intensive consumers, the resulting peak loads are provided by the MNE charge, which protects the battery from a deep discharge, preventing its premature failure.

Claims (6)

1. A combined-type wind power installation that converts the horizontal movement of the air flow into rotational motion of the rotor to produce electrical or mechanical energy from the kinetic energy of the flow and accumulates the energy received to provide uninterrupted power to consumers, including a battery of batteries using molecular energy storage, one or more unified modules located coaxially on a common support in the form of a rotor held by magnetic bearings, consisting of a plurality of circularly arranged blades of constant thickness or having a horizontal section in the shape of a wing, mounted vertically, curved to the side of rotation, rigidly fixed or equipped with a mechanism for changing the angle of attack, an electric current generator, an impeller guide consisting of many blades, flat or curved, mounted vertically at a certain angle to the radius, designed to increase the flow rate of the medium through the rotor and screen the parts of the rotor , Flow pressure which generates braking torque, and the carrier function of the power frame for installation in the rotor therein and build additional modules. 2. Installation according to claim 1, characterized in that the design employs an electric current generator consisting of a stator with a three-phase winding system and a rectifier fixed to it, a rotor with permanent rare earth magnets, using magnetically impervious materials to concentrate the magnetic flux crossing the stator windings . 3. The installation according to claim 1, characterized in that the conversion of the movement of the air into the rotational motion of the shaft of the electric current generator occurs due to the aerodynamic forces arising from the flow of the rotor stream of a module consisting of a rigid frame, many blades having a wing shape in cross section, located around a common vertical axis, equipped with a mechanism for changing the angle of attack depending on the direction of flow relative to the blade. 4. The installation according to claim 1, characterized in that in order to increase the service life and reduce the capacity of the batteries, a molecular energy storage device of the farad range is also used, which also ensures uninterrupted power supply for critical facilities. 5. Installation according to claim 1, characterized in that to increase the efficiency and reduce noise magnetic bearings are used. 6. Installation according to claim 1, characterized in that the electronic automatic control system allows you to switch the windings of the electric generator from the "star" circuit at a higher voltage at lower speeds to the "triangle" circuit at high speeds.