CN221482061U - Mining vertical axis fan kinetic energy recovery unit - Google Patents

Abstract

The utility model provides a kinetic energy recovery device for a vertical axis wind turbine for use in a mine, and belongs to the technical field of wind power generation. It solves the technical problem that the kinetic energy of the lack of wind in a mine has not been fully utilized for a long time, resulting in waste. The technical solution is: a kinetic energy recovery device for a vertical axis wind turbine for use in a mine, including a drainage device, a support mechanism and a wind turbine, the drainage device includes a drainage pipe with one end arranged inside the mine, the other end of the drainage pipe is connected to a ventilator, the support mechanism is arranged on the ground facing the diffuser, the wind turbine includes a generator and a wind wheel device, the main drive shaft in the wind wheel device is connected to the input shaft of the generator, and the output end of the generator is connected to the power grid or energy storage equipment through an AC-DC-AC converter. The beneficial effects of the utility model are: the utility model realizes the conversion of wind energy into electrical energy by making full use of the lack of wind in the mine, reduces the total energy consumption of electricity, and improves the economic benefits.

Description

A vertical axis wind turbine kinetic energy recovery device for mines

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a vertical axis wind turbine kinetic energy recovery device for mining.

Background technique

Due to the presence of dust and harmful gases in the mine, the health and safety of relevant staff are seriously threatened. Therefore, the exhaust air inside the mine needs to be discharged to the outside of the mine through the ventilator. The main ventilator used in the mine is an important power source for achieving air circulation inside and outside the mine. According to data, the annual average power consumption of mine ventilators accounts for about 20% of the total power consumption of the mine. However, these mine exhaust air kinetic energy has not been fully utilized for a long time, resulting in waste. At the same time, in order to actively respond to the "dual carbon" policy, it is particularly important to improve mine ventilation energy-saving technology. Therefore, how to realize the utilization of mine exhaust air has become an important research topic under the "dual carbon" policy. In order to reduce the total energy consumption of electricity and improve economic benefits during the operation of the mine, the recovery and utilization of mine exhaust air kinetic energy has gradually begun to be studied. Since the mine outlet exhaust air is relatively stable, it theoretically has the conditions for exhaust air recovery and power generation.

Utility Model Content

The purpose of the utility model is to provide a kinetic energy recovery device for a vertical axis fan for use in a mine, aiming to solve the problem that the kinetic energy of mine ventilation is not fully utilized, resulting in serious waste. By designing a reasonable plan, the kinetic energy generated by mine ventilation is converted into electrical energy and utilized, thereby achieving full utilization of mine ventilation resources.

In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is specifically: a kinetic energy recovery device of a vertical axis wind turbine for mining, comprising a drainage device, a supporting mechanism and a wind turbine, the drainage device comprising a drainage pipe at one end of which is arranged inside the mine, the other end of the drainage pipe is connected to a ventilator, the output end of the ventilator is provided with a diffuser, the supporting mechanism is arranged on the ground directly opposite to the diffuser, and the wind turbine is arranged at the upper end of the supporting mechanism; the wind turbine comprises a generator and a wind wheel device, the main drive shaft in the wind wheel device is connected to the input shaft of the generator, and the output end of the generator is connected to the power grid or energy storage equipment through an AC-DC-AC converter.

Furthermore, the ventilator is provided with a frequency converter, and the speed of the exhausted air extracted by the ventilator can be maintained or adjusted by adjusting the frequency.

Furthermore, the supporting mechanism includes a base installed on the ground, a tower is arranged at the upper end of the base, the wind turbine is arranged on the tower, and a tray is arranged between the tower and the wind turbine. The tray can make the installation of the wind turbine more stable, and the wind turbine is arranged on the upper part of the tower, and the generator and the wind wheel device can be connected as one, so that the structure is more compact and the main transmission shaft does not need to be too long.

Furthermore, the wind wheel device includes supporting wings, blades, a main shaft assembly and a brake device. The main transmission shaft in the main shaft assembly is connected to the input end of the generator. The fan sucks out the mine exhaust air and blows it to the wind wheel device through the diffuser, so that the blades in the wind wheel device rotate, and drives the generator to work through the main shaft assembly, thereby completing the conversion of kinetic energy into electrical energy.

Furthermore, the AC-DC-AC converter includes a rectifier and an inverter, the output end of the generator is connected to the input end of the rectifier, the output end of the rectifier is connected to the input end of the inverter, and the output end of the inverter is connected to the power grid or energy storage equipment. The rectifier is used to convert the AC power generated by the generator into DC power, and the inverter converts the DC power into usable AC power, and after adjusting the voltage and frequency as required, the electric energy is transmitted to other devices or the power grid.

Furthermore, the generator adopts a vertical axis lift type permanent magnet wind generator. Compared with the horizontal axis wind turbine in the prior art, the vertical axis lift type permanent magnet wind generator has a lower starting wind speed, high power generation efficiency, and more stable operation.

Furthermore, three blades are provided, and the three blades are evenly installed around the blade axis along the horizontal direction of wind exhaustion.

Furthermore, a speed regulating device is provided between the wind wheel device and the generator, so as to facilitate the adjustment of the generator rotation speed.

Furthermore, the inverter circuit adopts a 15-switch three-level topology structure, including a rechargeable battery for generator energy storage. The two ends of the rechargeable battery are connected by 2 series capacitors and 15 switch modules. The 15 switch modules use PWM modulation to achieve the inverter scenario in high-voltage and high-power occasions. The topology switch module uses an IGBT with a freewheeling diode, and the component capacity is relatively large.

Compared with the prior art, the beneficial effects of the utility model are:

1. The utility model makes full use of the lack of wind in the mine to realize the conversion of wind energy into electrical energy, thereby reducing the total energy consumption of electricity and improving economic benefits.

2. The drainage pipe is set on the circulation path of the mine exhaust air, which is conducive to ensuring the stability of the air flow rate, so as to achieve efficient utilization of the mine exhaust air kinetic energy. At the same time, a frequency converter is set on the ventilator, which is conducive to maintaining or adjusting the exhaust air speed extracted by the ventilator.

3. The generator adopts a vertical-axis lift-type direct-drive permanent magnet wind turbine to capture and convert the kinetic energy generated by the mine's lack of wind. Compared with traditional horizontal-axis fans, it has a lower starting wind speed, higher power generation efficiency, and more stable operation.

4. The generator is set on the upper part of the tower. This arrangement can make the main drive shaft not too long, have less impact on the airflow, and take into account the utilization rate of the mine wind-lack kinetic energy and its economic benefits to the maximum extent, which not only reduces the cost but also ensures the utilization rate of wind energy.

5. A 15-switch three-level topology is used in the generator inverter part, including a rechargeable battery for generator energy storage. The two ends of the rechargeable battery are connected by 2 series capacitors and 15 switch modules. The 15-switch three-level topology integrates energy storage and grid connection. The mine wind-deficient kinetic energy is stored in the rechargeable battery through the input port Boost circuit after passing through the rectifier, and the energy in the rechargeable battery is also supplied to the grid, thereby realizing a two-way flow of energy.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

FIG1 is a schematic structural diagram of the utility model.

FIG. 2 is a schematic structural diagram of a wind turbine in the present invention.

FIG3 is a schematic diagram of the structure of the inverter part of the utility model.

Among them, the figure markings are: 1. drainage pipe; 2. frequency converter; 3. fan; 4. diffuser; 5. generator; 6. support wing; 7. blade; 8. tower; 9. base; 10. rectifier; 11. inverter; 12. main drive shaft.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

Embodiment: The utility model provides a vertical axis wind turbine kinetic energy recovery device for mining, comprising a drainage device, a supporting mechanism and a wind turbine.

The drainage device includes a drainage pipe 1, which plays a role in stabilizing the flow. One end of the drainage pipe 1 is connected to the inside of the mine, and the other end is connected to the input end of the fan 3. The fan 3 adopts a three-phase asynchronous motor as a power device for recovering the mine exhaust air. The output end of the fan 3 is provided with a diffuser 4, and the air outlet efficiency of the fan 3 can be improved by changing its opening structural parameters; the fan 3 is provided with a 0-50Hz frequency converter 2, and the frequency can be adjusted to maintain or adjust the exhaust air speed extracted by the fan 3.

The supporting mechanism comprises a base 9 installed on the ground, a tower 8 is arranged on the upper end of the base 9, the wind turbine is arranged on the tower 8, and a tray is arranged between the tower 8 and the wind turbine, and the tray can make the installation of the wind turbine more stable.

The wind turbine includes a generator 5 and a wind rotor device. The wind turbine is arranged on the upper part of a tower 8. The generator 5 and the wind rotor device can be connected as one, so that the structure is more compact and the main transmission shaft 12 does not need to be too long. The support mechanism is arranged on the ground directly opposite to the diffuser 4, and the wind turbine is arranged on the upper end of the support mechanism; the main transmission shaft 12 in the wind rotor device is connected to the input shaft of the generator 5, and the output end of the generator 5 is connected to the power grid or energy storage equipment through an AC-DC-AC converter. The generator 5 adopts a vertical axis lift type permanent magnet wind generator. Compared with the horizontal axis wind turbine in the prior art, the vertical axis lift type permanent magnet wind generator has a lower starting wind speed, high power generation efficiency, and more stable operation.

The wind wheel device includes a supporting wing 6, blades 7, a main shaft assembly and a brake device. The main transmission shaft 12 in the main shaft assembly is connected to the input end of the generator 5. The ventilator 3 blows the sucked mine exhaust air to the wind wheel device through the diffuser 4. The blades 7 in the wind wheel device rotate and drive the generator 5 to rotate through the main transmission shaft 12 in the main shaft assembly, thereby completing the conversion of kinetic energy into electrical energy; three blades 7 are arranged, and the three blades 7 are evenly installed around the blade 7 axis along the horizontal direction of the exhaust air. A speed regulating device is arranged between the wind wheel device and the generator 5, which is convenient for adjusting the rotation speed of the generator 5.

The AC-DC-AC converter includes a rectifier 10 and an inverter 11. The output end of the generator 5 is connected to the input end of the rectifier 10, and the output end of the rectifier 10 is connected to the input end of the inverter 11. The output end of the inverter 11 is connected to the power grid or energy storage equipment. The rectifier 10 is used to convert the AC power generated by the generator 5 into DC power, and the inverter 11 converts the DC power into usable AC power, and after adjusting the voltage and frequency as required, transmits the electric energy to other devices or the power grid.

The inverter 11 part adopts a 15-switch three-level topology structure, including a rechargeable battery for storing energy in the generator 5. The two ends of the rechargeable battery are composed of 2 series capacitors and 15 switch modules. The 15-switch three-level topology integrates energy storage and grid connection. The mine wind-deficient kinetic energy is stored in the rechargeable battery through the input port Boost circuit after passing through the rectifier 10, and the energy in the rechargeable battery is also supplied to the grid, thereby realizing a two-way flow of energy; in the topology structure, 15 switch modules use PWM modulation to realize the inverter scenario of high voltage and high power occasions. The topology switch module uses IGBT with a freewheeling diode, and the component capacity is large, which effectively improves the economic benefits of recovering the mine wind-deficient kinetic energy.

During use, when the mine exhaust air system is working, first, the wind turbine is facing the air outlet of the mine ventilator 3. After the ventilator 3 is started, the mine exhaust air is extracted. After the exhaust air is extracted, it first passes through the drainage pipe 1, and the airflow becomes stable. After the exhaust air passes through the ventilator 3, it is discharged from the diffuser 4. The exhausted exhaust air will evenly enter the wind turbine and drive the blades 7 to rotate. The blades 7 rotate the generator 5 through the cooperation of the main shaft assembly. The generator 5 rotates and generates electrical energy. The generated electrical energy is converted by the rectifier 10 and the inverter 11 in turn, and finally incorporated into the power grid or energy storage device for use by other electrical equipment.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. The mining vertical axis fan kinetic energy recovery device is characterized by comprising a drainage device, a supporting mechanism and a wind turbine, wherein one end of the drainage device is arranged in a drainage tube (1) in a mine, the other end of the drainage tube (1) is connected with a ventilator (3), the output end of the ventilator (3) is provided with a diffuser (4), the supporting mechanism is arranged on the ground opposite to the diffuser (4), and the wind turbine is arranged at the upper end of the supporting mechanism;

The wind turbine comprises a generator (5) and a wind wheel device, wherein a main transmission shaft (12) in the wind wheel device is connected with an input shaft of the generator (5), and an output end of the generator (5) is connected with a power grid or energy storage equipment through an AC-DC-AC converter;

The supporting mechanism comprises a base (9) arranged on the ground, a tower (8) is arranged at the upper end of the base (9), the wind turbine is arranged on the tower (8), and a tray is arranged between the tower (8) and the wind turbine;

the AC-DC-AC converter comprises a rectifier (10) and an inverter (11), wherein the output end of the generator (5) is connected with the input end of the rectifier (10), the output end of the rectifier (10) is connected with the input end of the inverter (11), the output end of the inverter (11) is connected with a power grid or energy storage equipment, and a 15-switch three-level topological structure is adopted inside the inverter (11).

2. The mining vertical axis fan kinetic energy recovery device according to claim 1, wherein a frequency converter (2) is arranged on the ventilator (3).

3. The mining vertical axis fan kinetic energy recovery device according to claim 1, wherein the wind wheel device comprises supporting wings (6), blades (7), a main shaft assembly and a brake device, and a main transmission shaft (12) in the main shaft assembly is connected with an input end of a generator (5).

4. The mining vertical axis fan kinetic energy recovery device according to claim 1, wherein the generator (5) is a vertical axis lift type permanent magnet wind generator.

5. A mining vertical axis fan kinetic energy recovery device according to claim 3, wherein three blades (7) are provided, and the three blades (7) are uniformly installed around the axis of the blades (7) along the horizontal direction of the ventilation air.

6. The mining vertical axis fan kinetic energy recovery device according to claim 1, wherein a speed regulating device is arranged between the wind wheel device and the generator (5).