Wind energy cogeneration unit based on magnetic suspension technology and control method thereof

Abstract

This invention relates to a wind-powered combined heat and power (CHP) unit based on magnetic levitation technology and its control method. A wind-powered CHP unit may include: a hub on which blades are mounted; a main shaft connected to the hub and supported by a main shaft bearing; a gearbox including a low-speed shaft and a high-speed shaft, the low-speed shaft being connected to the main shaft; a generator, one end of the generator's rotor being connected to the high-speed shaft of the gearbox via a first electromagnetic clutch; and a compressor, the compressor's drive shaft being connected to the other end of the generator's rotor via a second electromagnetic clutch.

Description

Technical Field

[0001] This invention relates generally to the field of new energy, and more particularly to a wind power cogeneration unit based on magnetic levitation technology and its control method. Background Technology

[0002] Unlike traditional fossil fuels, the development of new energy sources, also known as renewable energy, is a crucial component of global energy strategy. Utilizing renewable energy sources such as wind and solar power has become an important means of addressing the dual challenges of energy security and global climate change. The inherent volatility and intermittency of renewable energy mean that it cannot provide the stable and continuous power output of traditional fossil fuels. This unstable power supply pattern significantly impacts grid operation, increasing the complexity of grid management and dispatch. Moreover, renewable energy sources such as wind and solar power are not as easily stored as fossil fuels. For example, when electricity demand is low at night, the electricity generated by wind power cannot be absorbed by the grid, often leading to the shutdown of wind power generation, resulting in energy waste and reducing the economic viability of wind power equipment. Therefore, efforts are being made on the one hand to address the instability of renewable energy power, ensuring the stable and efficient application and absorption of energy; on the other hand, actively exploring and innovating non-electrical utilization pathways of renewable energy to broaden its application areas. Summary of the Invention

[0003] Clean wind power heating has become an important solution that combines ecological and energy benefits. Continuously promoting clean energy heating in urban areas can reduce environmental pollution caused by the inefficient combustion of fossil fuels and improve air quality in northern regions during winter. Converting wind power into heat for heating can significantly improve the utilization rate of wind energy, especially at night. However, traditional wind power heating models use electricity from wind turbine generators to drive heating equipment, such as electric heating devices or heat pump motors. This requires multiple conversions from wind / mechanical energy to electrical energy, and then from electrical energy to heat energy, resulting in low energy efficiency. To improve energy efficiency and better align with the scientific energy use principle of "temperature matching and tiered utilization," this invention proposes a wind-powered combined heat and power (CHP) unit that can directly convert wind / mechanical energy into electrical and heat energy, providing electricity where appropriate and heat where appropriate, avoiding energy losses during the electrothermal conversion process and improving the overall wind energy utilization capacity of the unit.

[0004] On the other hand, traditional wind turbine generators and wind-powered cogeneration units use mechanical bearings for their shafts, resulting in significant mechanical friction and component wear. Furthermore, the large static friction forces that need to be overcome during startup place high demands on starting wind speed and torque, making them unsuitable for installation in low-wind-speed areas. In addition, they generate considerable noise and heat accumulation during operation, impacting the efficiency and reliability of the entire system. Regular maintenance and replacement of worn bearings are required, further increasing costs. Therefore, this invention proposes a wind-powered cogeneration unit based on magnetic levitation technology. Utilizing the non-contact, frictionless characteristics of magnetic levitation bearings, it significantly reduces frictional losses, resulting in smoother operation, extended equipment lifespan, and improved energy efficiency. Moreover, by employing magnetic levitation technology and the control method proposed in this invention, static friction during startup can be significantly reduced, thereby lowering the requirements for starting wind speed and torque, enabling the installation and use of this wind-powered cogeneration unit even in low-wind-speed areas.

[0005] According to one aspect of the present invention, a wind power combined heat and power unit is provided, comprising: a hub on which blades are mounted; a main shaft connected to the hub and supported by a main shaft bearing; a gearbox including a low-speed shaft and a high-speed shaft, the low-speed shaft being connected to the main shaft; a generator, one end of the rotor of the generator being connected to the high-speed shaft of the gearbox via a first electromagnetic clutch; and a compressor, the drive shaft of the compressor being connected to the other end of the rotor of the generator via a second electromagnetic clutch.

[0006] According to one embodiment, the spindle bearing includes a first bearing and a second bearing. The first bearing supports the neck of the end of the spindle connected to the hub, and the second bearing supports the tail of the end of the spindle connected to the gearbox. The second bearing is a magnetic levitation bearing.

[0007] According to one embodiment, the gearbox further includes: a first magnetic levitation bearing for supporting one end of the low-speed shaft connected to the main shaft; and a second magnetic levitation bearing for supporting one end of the high-speed shaft connected to the generator.

[0008] According to one embodiment, the generator further includes a stator surrounding the rotor, with both ends of the rotor extending beyond the stator and supported by magnetic levitation bearings, so that the rotor is fully magnetically levitated during generator operation.

[0009] According to one embodiment, the wind power cogeneration unit further includes a heat exchange system, which includes a condenser disposed in a heat exchange tank. One end of the condenser is connected to the outlet of the compressor, and the other end is connected to an evaporator via an electronic expansion valve. The evaporator is connected to the inlet of the compressor. The gearbox, the generator, the compressor, and the heat exchange system are disposed together in a nacelle located at the top of the tower.

[0010] According to one embodiment, the wind-powered combined heat and power unit further includes a control system for controlling the first electromagnetic clutch and the second electromagnetic clutch.

[0011] According to another aspect of the present invention, a control method for the above-mentioned wind-powered combined heat and power unit is provided, comprising, during startup: controlling a first electromagnetic clutch to disconnect the generator from the gearbox, starting the blades and the hub to start rotating, thereby driving the main shaft to rotate; and controlling a second electromagnetic clutch to disconnect the generator from the compressor, and controlling the first electromagnetic clutch to connect the generator to the gearbox, so that the generator starts generating electricity under the drive of the main shaft, thereby entering a power supply mode.

[0012] According to one embodiment, the method further includes: in the power supply mode, controlling the second electromagnetic clutch to connect the drive shaft of the compressor to the rotor of the generator, so that the compressor starts running under the drive of the main shaft to enter the combined heat and power mode.

[0013] According to one embodiment, the method further includes: activating one or more magnetic levitation bearings supporting at least one of the low-speed shaft and the high-speed shaft of the main shaft and the gearbox to enter a magnetic levitation state before starting the blades and the hub to begin rotating; or activating the magnetic levitation bearings supporting the rotor of the generator to bring the rotor into a fully magnetically levitation state before entering the power supply mode.

[0014] According to one embodiment, the method further includes: monitoring the output current or voltage of the generator in real time to control the first electromagnetic clutch to adjust the rotational speed of the generator rotor, thereby enabling the generator to provide a desired power output; and monitoring one or more of the temperature, pressure, and flow rate of the compressor's output airflow to control the second electromagnetic clutch to adjust the rotational speed of the compressor's drive shaft, thereby enabling the compressor to provide a stable gas supply.

[0015] The above and other features and advantages of the present invention will become apparent from the following description of exemplary embodiments in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1A schematic diagram of a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention is shown.

[0017] Figure 2 A schematic diagram of the main shaft and main shaft bearing of a wind power cogeneration unit according to an exemplary embodiment of the present invention is shown.

[0018] Figure 3 A schematic diagram of a magnetic levitation bearing according to an exemplary embodiment of the present invention is shown.

[0019] Figure 4 A schematic diagram of a gearbox for a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention is shown.

[0020] Figure 5 A schematic diagram of a generator for a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention is shown.

[0021] Figure 6 A schematic diagram of a compressor for a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention is shown.

[0022] Figure 7 A schematic diagram of a heat exchange system for a wind power combined heat and power unit according to an exemplary embodiment of the present invention is shown.

[0023] Figure 8 A schematic diagram of a heating system according to an exemplary embodiment of the present invention is shown. Detailed Implementation

[0024] The following describes one or more specific embodiments of the present invention. These embodiments are merely illustrative examples of the invention. Practical applications of the invention may not cover all features described herein. It should be understood that, in the development of practical applications, similar to any engineering or design project, multiple implementation decisions need to be made to achieve the developer's specific goals, such as complying with relevant system and business constraints. These implementation decisions may differ in different applications. It should also be understood that such development work can be complex and time-consuming; however, for those skilled in the art, this work remains routine in design, assembly, and manufacturing.

[0025] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only used to facilitate the explanation of the present invention and simplify the description. They do not mean that the related devices or components must have a specific direction or be constructed and operated in a specific direction, and therefore should not be regarded as a limitation of the present invention.

[0026] The terms "installation" and "connection" should be interpreted broadly. For example, these connections can be fixed, detachable, or integrated; they can be mechanical or electrical; they can be direct, indirect through an intermediate medium, or internal connections within components. Those skilled in the art will understand the specific meaning of these terms in this invention based on the specific circumstances.

[0027] Some exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the drawings are not drawn to scale. Figure 1 This is a schematic diagram of a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention. Figure 1 As shown, the wind power generation equipment includes a tower 11, also known as a tower tube, with a chassis 12 mounted on top of the tower 11. A nacelle 10 is rotatably mounted on the chassis 12. A yaw motor 9 can be installed inside the nacelle 10, which drives the nacelle 10 to rotate relative to the chassis 12, thus controlling the yaw direction of the nacelle 10. This ensures that the wind turbine rotor at one end of the nacelle 10 is facing the wind, maximizing wind energy utilization and improving power generation efficiency. The tower 11 has a hollow cylindrical structure and can be equipped with an elevator or ladder, allowing personnel to access the nacelle 10 for routine inspection and maintenance.

[0028] Continue to refer to Figure 1 The fan blades 1 can be mounted on the hub 2. The blades 1 and the hub 2 together can be referred to as an impeller or wind turbine. Generally, three fan blades 1 can be mounted on the hub 2, but the invention is not limited to this; more or fewer blades 1 can also be mounted on the hub 2. The hub 2 is mechanically connected to the main shaft 3, which can be supported by the main shaft bearing 4. The distal end of the main shaft 3 can be connected to the gearbox 5, for example, by a coupling (not shown), because the speed at which the impeller drives the main shaft 3 to rotate is generally relatively low, far below the speed required for the generator to generate electricity. Therefore, the gearbox 5 is used to increase the speed. The high-speed shaft of the gearbox 5 can be connected to the generator 7 via a first electromagnetic clutch 6a, and then to the compressor 8 of the heat pump via a second electromagnetic clutch 6b. Thus, the main shaft 3 can drive the generator 7 and the compressor 8 to achieve combined heat and power, which will be described in further detail below. The electromagnetic clutch can also be called an electromagnetic coupling, which can act as a clutch (i.e., shaft connection and disconnection) and can also be used for speed regulation. It should be understood that multiple mechanical couplings (not shown) can also be installed between the main shaft 3 and the compressor 8, which allow for a certain assembly margin between the shafts, facilitating the installation of the entire system. The main shaft bearing 4, gearbox 5, generator 7, compressor 8, and yaw motor 9 can all be mounted on the base of the engine compartment 10.

[0029] Figure 2 Show Figure 1The diagram shows the main shaft 3 and main shaft bearing 4 of the wind power combined heat and power unit. Figure 2 As shown, the spindle 3 may include a flange 31 located at one end for mechanical connection to the hub 2, and a spindle body 32 extending axially from the flange 31. The flange 31 and spindle body 32 are generally formed of metal, such as stainless steel, and the spindle body 32 is generally hollow to reduce weight. The neck of the spindle body 32, which connects to the flange 31, is generally thicker, gradually decreasing in diameter in the middle, and the end / distal end may have a smaller diameter relative to the neck; however, it should be understood that the spindle 3 is not limited to... Figure 2 The shape shown.

[0030] The main shaft bearing 4 may include a first bearing 41 and a second bearing 42. The first bearing 41 may be installed on the neck of the main shaft body 32 near the flange 31, and the second bearing 42 may be installed near the tail / end of the main shaft body 32 with a smaller diameter. Thus, the first bearing 41 and the second bearing 42 together can effectively support and fix the main shaft 3, preventing the main shaft 3 from swaying or vibrating when the impeller is blown by wind, allowing the main shaft 3 to rotate smoothly. In some embodiments, the first bearing 41 may be a conventional mechanical bearing, such as a rolling bearing or a sliding bearing, which can withstand the huge mechanical impact force generated when the impeller is blown by wind, keeping the main shaft 3 stable in both the radial and axial directions. The second bearing 42 may be a magnetic levitation bearing, which can reduce the friction of the main shaft 3 and improve wind energy utilization efficiency. A sensor 43 may be provided on the magnetic levitation bearing, which can detect the position of the main shaft body 32, thereby controlling the electromagnet in the magnetic levitation bearing so that the main shaft body 32 is magnetically levitated and supported in the appropriate position, as will be discussed further below. The sensor 43 can also detect the rotational speed of the main shaft body 32 for speed control as described later. Of course, in some embodiments, the second bearing 42 can also be a conventional mechanical bearing. Although not shown, both the first bearing 41 and the second bearing 42 can be fixedly mounted on the base of the engine room 10 by a mechanical support structure.

[0031] Figure 3 A schematic diagram of a magnetic levitation bearing according to an exemplary embodiment of the present invention is shown, which can be used as, for example, the second bearing 42 described above, or as other magnetic levitation bearings described below. (Refer to...) Figure 3The magnetic levitation bearing includes an outer ring (also referred to as a stator) 44, a plurality of radial columns 45 disposed on the inner wall of the outer ring 44, and an inner ring (also referred to as a rotor) 46. Although not shown, coils may be wound on the radial columns 45 to form an electromagnet, and the radial columns 45 serve as the core of the electromagnet. In some embodiments, the outer ring 44 and the radial columns 45 may be an integral structure; in other embodiments, a core material may be additionally disposed on the radial columns 45, the core material being generally a soft ferromagnetic material, such as soft iron, silicon steel, etc. The inner ring / rotor 46 may include a permanent magnet such as neodymium iron boron. A sensor (not shown) may also be disposed on the outer ring / stator 44 to detect the position of the inner ring / rotor 46, and the direction and intensity of the current of the electromagnet are controlled according to the detected position of the inner ring / rotor 46, adjusting the magnitude and direction of the magnetic force so that the inner ring / rotor 46 is magnetically supported at the desired position without contact with the outer ring / electromagnet, thus achieving magnetic levitation support.

[0032] Understandable. Figure 3 The magnetic bearing shown can only restrict the radial displacement of the inner ring 46 during operation, but cannot prevent it from sliding axially; therefore, it can also be called a radial magnetic bearing. Similarly, there are axial magnetic bearings that can restrict the axial displacement of the supported structure without contact (by magnetic force), and their principle is similar to that of the radial magnetic bearing described herein; therefore, a detailed description of them is omitted. It should be understood that in the embodiments of the present invention, various commercially available magnetic bearings in the prior art can be used to implement the various support and restriction functions described herein. Although Figure 2 Only the radial magnetic bearing 42 for supporting the spindle body 32 is shown, but an axial magnetic bearing can also be provided to limit the axial displacement of the spindle body 32.

[0033] Figure 4 A schematic diagram of the gearbox 5 of a wind power combined heat and power unit according to an exemplary embodiment of the present invention is shown. Figure 4 As shown, the gearbox 5 includes a low-speed shaft 52 and a high-speed shaft 53. One end of the low-speed shaft 52 has a flange 51 for connection to the main shaft 3. A gear set (not shown) is provided between the low-speed shaft 52 and the high-speed shaft 53, converting the low speed of the low-speed shaft 52 to the high speed of the high-speed shaft 53 through an appropriate gear ratio, to achieve the speed required for the generator 7 to generate electricity. The high-speed shaft 53 can be connected to the generator 7 via a first electromagnetic clutch 6a to drive the generator 7 to generate electricity. The gearbox 5 also includes magnetic bearings 54a and 54b, which can be configured to support the low-speed shaft 52 and the high-speed shaft 53, respectively. For example, as... Figure 4 As shown, magnetic levitation bearing 54a can support the end of low-speed shaft 52 connected to main shaft 3, and magnetic levitation bearing 54b can support the end of high-speed shaft 53 connected to generator 7. However, it should be understood that the number and placement of magnetic levitation bearings are not limited to this. Figure 4 The embodiment shown. The low-speed shaft 52 and high-speed shaft 53 may include permanent magnet material; for example, permanent magnet material may be disposed at their portions corresponding to the magnetic levitation bearings, or they may be formed of permanent magnet material so that they can be supported by the magnetic levitation bearings. Furthermore, in addition to radial magnetic levitation bearings, one or more axial magnetic levitation bearings may be provided to limit the axial movement of the low-speed shaft 52 and high-speed shaft 53. It should be understood that the low-speed shaft 52 and high-speed shaft 53 are also connected to each other by a gear set, which may include, for example, planetary gears, sun gears, etc., and may be mounted in the gearbox 5 via, for example, mechanical bearings and a gear carrier. Sensors 55a and 55b are also respectively provided on the magnetic levitation bearings 54a and 54b to monitor the displacement and rotational speed of the low-speed shaft 52 and high-speed shaft 53 in real time. The sensor signals may be transmitted wired or wirelessly to a controller for executing the control method of the present invention, which will be described below. It is understood that in some other embodiments, conventional mechanical bearings may be used instead of magnetic levitation bearings 54a and 54b. In this case, sensors can still be set to monitor the rotational speed of low-speed shaft 52 and high-speed shaft 53 in real time.

[0034] Figure 5 A schematic diagram of the generator 7 of a wind-powered combined heat and power unit according to an exemplary embodiment of the present invention is shown. Figure 5 As shown, the generator 7 may include a stator 71 and a rotor 73. A coil 72 may be provided on the stator 71, for example, the coil 72 may be wound in a groove or hole on the stator 71. A permanent magnet material 74 may be provided on the rotor 73, located in the space surrounded by the stator 71, or the rotor 73 may be formed of the permanent magnet material. It should be understood that the coil may also be wound on the rotor 73, and the permanent magnet material may be provided on the stator 71. The two ends of the rotor 73 may extend beyond the rotor 73 and are supported by magnetic bearings 75a and 75b respectively. The portions of the rotor 73 corresponding to the magnetic bearings 75a and 75b may include the permanent magnet material. Sensors 76a and 76b may be provided on the magnetic bearings 75a and 75b for monitoring the position and rotational speed of the rotor 73. Figure 5 Also shown is an axial magnetic levitation bearing 77 disposed on a rotor 73. For example, a flange 73a is formed on the rotor 73, the flange 73a being formed of or having a permanent magnet material disposed thereon. The magnetic levitation bearing 77 is disposed on both sides of the flange 73a to limit the displacement of the flange 73a along the axial direction of the rotor 73 by magnetic force. Figure 5 In the embodiment shown, the entire rotor 73 of the generator 7 can be fully supported by magnetic levitation bearings, so there is almost no friction during power generation, thereby further improving wind energy utilization efficiency and increasing the service life of the equipment.

[0035] Figure 6A schematic diagram of a compressor 8 in a wind power combined heat and power unit according to an exemplary embodiment of the present invention is shown. The compressor 8 can be implemented as various types of compressors, such as reciprocating compressors, scroll compressors, screw compressors, rotary compressors, etc. Figure 6 As shown, the compressor 8 may include a drive shaft 81 and a compressor body 82. The drive shaft 81 can be driven by a second electromagnetic clutch 6b (see...). Figure 1 The rotor 73 is connected to the generator 7. The compressor body 82 may have an inlet 83 and an outlet 84. Refrigerant such as ammonia, R410A, etc. enters the compressor from the inlet 83, is compressed into a high-temperature and high-pressure gas, and is discharged from the outlet 84.

[0036] Figure 7 A schematic diagram of a heat exchange system for a wind power combined heat and power unit according to an exemplary embodiment of the present invention is shown. Figure 7 The heat exchange system shown and Figure 6 The compressors shown together form a heat pump, serving as the heating module of a wind-powered combined heat and power unit. For example... Figure 7 As shown, the inlet 86a of the condenser tube 86 is connected to the compressor outlet 84. The compressed, high-temperature, high-pressure refrigerant gas enters the condenser tube 86, releases heat, and condenses into a liquid. The condenser tube 86 is located in a water exchange tank 85. Water (or antifreeze or other heat transfer medium) in the tank 85 absorbs heat from the condenser tube 86 (or from the refrigerant), is heated, and then discharged from the tank 85 to provide heat to the outside. The tank 85 has an inlet 85a and an outlet 85b. Cold water enters from the inlet 85a, and hot water exits from the outlet 85b, completing the cycle. The condensed refrigerant exits from the outlet 86b of the condenser tube 86, passes through the electronic expansion valve 87 to reduce its pressure, and then enters the evaporator 88. It absorbs heat from the outside, evaporates, and becomes intake gas, returning to the compressor inlet 83, completing the cycle. Although not shown, a fan can be installed at the evaporator 88 to accelerate airflow and promote the heat absorption and evaporation process of the refrigerant in the evaporator 88.

[0037] Figure 6 The compressor shown and Figure 7The heat exchange system shown can be combined to form a heat pump, which can be installed in the nacelle 10. On one hand, this heat pump eliminates the electric motor used in traditional heat pumps, instead using wind / mechanical energy to directly drive the compressor 8's main shaft 81. This avoids the energy loss during the two energy conversion processes involved in converting wind energy into electrical energy and then using that electrical energy to drive the compressor motor, thus greatly improving wind energy utilization efficiency. This is because driving the compressor main shaft 81 with wind / mechanical energy does not involve the conversion between different energy forms, resulting in only a small amount of energy loss due to mechanical processes. On the other hand, the evaporator 88, located in the nacelle 10, can absorb the heat accumulated during the operation of the fans in the nacelle. This heat is ultimately carried away by hot water in the water tank to provide heating for users, essentially providing air conditioning for the nacelle. This is particularly useful in summer, ensuring a suitable working environment within the nacelle and improving wind energy utilization efficiency, as the heat loss generated during operation is collected and utilized. Therefore, the entire system continuously achieves maximum energy utilization efficiency and improves the working environment within the nacelle, contributing to the long-term stable operation of the entire system.

[0038] In another embodiment, Figure 6 The compressor shown can be installed in cabin 10, but Figure 7 The heat exchange system shown can be installed, for example, at a user's house. In such an embodiment, the high-temperature, high-pressure gas output from the compressor 8 needs to be supplied to the condenser 86 located at the user's house via an insulated pipe. The advantage of this embodiment is that it reduces the number of devices in the engine room 10, and placing the heat exchange system near the user's house facilitates routine maintenance and repairs.

[0039] Figure 8 A schematic diagram of a heating system according to an exemplary embodiment of the present invention is shown. Figure 8As shown, hot water from water tank 85 is supplied to the user's home heating equipment 90 via pipe 89. Pipe 89 can be covered with insulation material to prevent heat loss and can be installed inside a hollow tower 11. Heating equipment 90 includes, but is not limited to, underfloor heating, radiators, hot water taps, and shower equipment. Water that has cooled down after releasing heat can enter an insulated storage tank 91, and then be supplied to the inlet 85a of the hot water exchange tank 85 by a water pump 92, completing the heating cycle. The insulated storage tank 91 and the water pump 92 can be installed on the ground. It should be understood that multiple water pressure gauges can be installed in the circulation pipeline, and water supply and drainage interfaces can also be installed to replenish water into the circulation pipeline when the water pressure is insufficient and to drain water when the water pressure is too high or during maintenance shutdown. In addition, thermometers can be installed in the circulation pipeline, for example in the insulated storage tank 91, to ensure that water at appropriate temperatures, such as above 5°C, above 10°C, above 15°C, or above 20°C, is supplied to the hot water exchange tank 85. If necessary, heating equipment such as an electric heater can be installed in the insulated water storage tank 91 to prevent the water from freezing in extremely low temperatures, which could render the entire system inoperable or even damage it.

[0040] The following description Figure 1 The control method for the wind-powered combined heat and power (CHP) unit is shown. It should be understood that a battery can be installed inside the nacelle 10, or an external power supply can be provided, allowing control of the unit, such as startup operations, to be performed even when the entire unit is shut down and not generating electricity. Initially, it is assumed that the entire system is in a shutdown state. During startup, the first electromagnetic clutch 6a is disengaged, so that the generator 7 and compressor 8 are not connected to the main shaft 3. If the main shaft 3 and gearbox 5 use magnetic levitation bearings, the magnetic levitation bearings are activated first to put one end of the main shaft 3 and the low-speed shaft 52 and high-speed shaft 53 of the gearbox 5 into a magnetic levitation state. Then, the mechanical locking of the relevant structures is released, the orientation of the blades 1 is adjusted, and if necessary, the yaw motor 9 deflects the impeller to face the windward direction. At this time, the wind will drive the impeller and the main shaft 3 to start rotating, achieving a smooth startup. During this process, since neither the generator 7 nor the compressor 8 is connected to the main shaft 3, i.e. there is no load, and one end of the main shaft 3 and the low-speed shaft 52 and high-speed shaft 53 of the gearbox 5 are in a magnetic levitation state, the frictional resistance is minimized as much as possible, so the impeller can start at low wind speed.

[0041] After the impeller begins to rotate, the magnetic levitation bearing in the generator 7 is activated first, so that the rotor 73 is fully supported by magnetic levitation. Then, the first electromagnetic clutch 6a is controlled to connect the rotor 73 of the generator 7 to the high-speed shaft 53 of the gearbox 5, and power generation begins. In pure power supply mode, the second electromagnetic clutch 6b is controlled to disconnect the drive shaft 81 of the compressor 8 from the rotor shaft of the generator 7, and the heating process is not performed at this time. During power supply, the speed of the generator 7 can be adjusted by controlling the first electromagnetic clutch 6a, for example, by adjusting the speed by real-time monitoring of the output voltage and / or current, thereby controlling the output power.

[0042] When heating is required, the second electromagnetic clutch 6b is controlled to connect the drive shaft 81 of the compressor 8 to the rotating shaft of the generator 7, thereby directly driving the compressor 8 with wind / mechanical energy, eliminating the need for an electric motor. At this time, the generator 7 continues to generate electricity, thus achieving combined heat and power (CHP). In CHP mode, the rotational speed of the generator 8 can be controlled by adjusting the second electromagnetic clutch 6b, for example, by real-time monitoring of the gas pressure, flow rate, and temperature at the inlet 83 and outlet 84 of the compressor 8, and / or the water temperature at the inlet and outlet of the water tank 85, to achieve stable gas supply, compression efficiency, and the desired heat supply, thereby adapting to varying application environments.

[0043] In addition, in pure power supply and combined heat and power modes, sensors installed at the magnetic levitation bearing can be used to monitor the shaft displacement and rotation speed in real time, and adjust the current of the electromagnet in the magnetic levitation bearing to control the magnitude and direction of the magnetic force, ensuring the stability and response speed of the levitation and maintaining the smooth operation of the unit.

[0044] Although not shown, the wind-powered cogeneration unit of the present invention also includes a control system for executing the above-described control method. This control system can be located, for example, at the bottom of the tower 11, in a user's home, or in a centralized control room. Data sensed by various sensors in the wind-powered cogeneration unit can be transmitted to the control system via wired or wireless means, such as fiber optic cables, 4G, or 5G communication networks, using existing communication protocols. Commands issued by the control system can also be transmitted via wired or wireless means to the corresponding actuators in the wind-powered cogeneration unit, thereby implementing the control method described above.

[0045] Unless the context explicitly requires otherwise, throughout the specification and claims, the words “comprising,” “including,” “comprise,” “including,” etc., shall be interpreted in an inclusive sense, rather than an exclusive or exhaustive sense. That is, they mean “including but not limited to.” The term “connection” as commonly used herein refers to two or more elements that can be directly connected or connected via one or more intermediate elements. Furthermore, when used in this application, the terms “this,” “above,” “below,” and similar terms shall refer to the entire application and not any particular part thereof. Where the context permits, the term “or” refers to a list of two or more items, encompassing all of the following interpretations: any item in the list, all items in the list, and any combination of items in the list.

[0046] Furthermore, unless otherwise specifically stated or otherwise understood in the context in which they are used, the conditional language used herein, such as “can,” “may,” “possibly,” “can,” “for example,” “likely,” “such as,” etc., is generally intended to express that certain embodiments include certain features, elements, and / or states, while other embodiments do not. Therefore, such conditional language is not generally intended to imply that one or more embodiments require features, elements, and / or states in any way, or that one or more embodiments must include logic for making a decision, with or without author input or prompts, that determines whether such features, elements, and / or states are included in or will be performed in any particular embodiment.

[0047] While certain embodiments have been described, these embodiments are presented by way of example only and are not intended to limit the scope of this disclosure. In fact, the novel facilities, methods, and systems described herein can be embodied in a variety of other forms; furthermore, various omissions, substitutions, and changes can be made to the form of the methods and systems described herein without departing from the spirit of this disclosure. For example, although blocks are presented in a given arrangement, alternative embodiments may perform functions similar to different components and / or circuit topologies, and some blocks may be deleted, moved, added, subdivided, combined, and / or modified. Each of these blocks can be implemented in a variety of different ways. Any suitable combination of elements and actions of the various embodiments described above can be combined to provide further embodiments. The appended claims and their equivalents are intended to cover these forms or modifications that fall within the scope and spirit of this disclosure.

[0048] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A wind-powered combined heat and power unit, comprising: A hub (2) on which blades (1) are mounted; The main shaft (3) is connected to the hub (2) and is supported by the main shaft bearing (4); The gearbox (5) includes a low-speed shaft (52) and a high-speed shaft (53), the low-speed shaft (52) being connected to the main shaft (3); A generator (7), one end of the rotor (73) of which is connected to the high-speed shaft (53) of the gearbox (5) via a first electromagnetic clutch (6a); and The compressor (8) has its drive shaft (81) connected to the other end of the rotor (73) of the generator (7) via a second electromagnetic clutch (6b).

2. The wind energy cogeneration unit of claim 1, wherein, The main shaft bearing (4) includes a first bearing (41) and a second bearing (42). The first bearing (41) supports the neck of the end of the main shaft (3) connected to the hub (2), and the second bearing (42) supports the tail of the end of the main shaft (3) connected to the gearbox (5). The second bearing (42) is a magnetic levitation bearing.

3. The wind energy cogeneration unit of claim 1, wherein, The gearbox (5) also includes: A first magnetic levitation bearing (54a) is used to support one end of the low-speed shaft (52) connected to the main shaft (3); and A second magnetic levitation bearing (54b) is used to support the end of the high-speed shaft (53) that is connected to the generator (7).

4. The wind energy cogeneration unit of claim 1, wherein, The generator (7) also includes a stator (71) surrounding the rotor (73), the two ends of which extend beyond the stator (71) and are supported by magnetic bearings, so that the rotor (73) is fully supported by magnetic levitation when the generator (7) is in operation.

5. The wind-powered combined heat and power unit as described in claim 1 further includes a heat exchange system, the heat exchange system comprising: A condenser (86) is installed in the hot water tank (85). One end of the condenser (86) is connected to the outlet of the compressor (8), and the other end is connected to the evaporator (88) via an electronic expansion valve (87). The evaporator (88) is in turn connected to the inlet of the compressor (8). The gearbox (5), the generator (7), the compressor (8) and the heat exchange system are housed together in the nacelle (10) located at the top of the tower (11).

6. The wind power combined heat and power unit as described in claim 1, further comprising: A control system for controlling the first electromagnetic clutch (6a) and the second electromagnetic clutch (6b).

7. A control method for a wind-powered combined heat and power unit as described in claim 1, comprising, during startup: Controlling the first electromagnetic clutch (6a) to disconnect the generator (7) from the gearbox (5) starts the blades (1) and the hub (2) to rotate, thereby driving the main shaft (3) to rotate; and Control the second electromagnetic clutch (6b) to disconnect the generator (7) from the compressor (8), and control the first electromagnetic clutch (6a) to connect the generator (7) to the gearbox (5), so that the generator (7) starts generating electricity under the drive of the main shaft (3) to enter the power supply mode.

8. The method of claim 7, further comprising: In the power supply mode, the second electromagnetic clutch (6b) is controlled to connect the drive shaft (81) of the compressor (8) to the rotor (71) of the generator (7), so that the compressor (8) starts to run under the drive of the main shaft (3) to enter the combined heat and power mode.

9. The method of claim 8, further comprising: Before the blade (1) and the hub (2) are started to rotate, one or more magnetic levitation bearings of at least one of the low-speed shaft (52) and high-speed shaft (53) supporting the main shaft (3) and the gearbox (5) are activated to enter the magnetic levitation state. or Before entering the power supply mode, the magnetic levitation bearing of the rotor (71) supporting the generator (7) is activated to put the rotor (71) into a state of complete magnetic levitation.

10. The method of claim 9, further comprising: The output current or voltage of the generator (7) is monitored in real time to control the first electromagnetic clutch (6a) to adjust the speed of the rotor (71) of the generator (7), so that the generator (7) provides the desired power output; as well as The temperature, pressure, and flow rate of the output airflow of the compressor (8) are monitored to control the second electromagnetic clutch (6b) to adjust the rotational speed of the drive shaft (81) of the compressor (8), thereby enabling the compressor (8) to provide a stable gas supply.

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