CN117823361A - Wind Turbine - Google Patents

Abstract

The application relates to a wind generating set, which comprises a cabin, a hub and an induced air part, wherein the cabin comprises a cabin cover, an air inlet and a first air outlet are arranged on the cabin cover, and the first air outlet and the air inlet are distributed at intervals; the hub is connected with the engine room, and a second air outlet is formed in the hub; the air inducing piece is arranged at the first air outlet, and natural wind outside the cabin cover can drive the air inducing piece to rotate and suck the inner cavity of the cabin cover, so that a first air flow and a second air flow are formed at the air inlet under the action of negative pressure; the first air flow flows through the engine room and is discharged from the first air outlet, and the second air flow flows through the hub and is discharged from the second air outlet. The embodiment of the application provides a wind generating set, can form the air current flow with outside natural wind effect, can dispel the heat to cabin and wheel hub simultaneously, avoided electric energy drive, saved the electricity cost when dispelling the heat.

Description

Wind Turbine

Technical Field

The present application relates to the technical field of wind power generation, and in particular to a wind power generator set.

Background technique

As the capacity of wind turbines continues to increase, the heat dissipation inside the head and the heat dissipation components are also increasing. Therefore, the rationality, reliability and economy of the heat dissipation system design have an important impact on the parity development of wind turbines and the safe operation of the units.

The heat dissipation layout design of the entire head of the existing unit is mainly concentrated in the cabin. For the heat dissipation device of the cabin, the air flow disturbance in the unit is often formed through the operation of the fan, or the cabin temperature is controlled through air-water heat exchangers, air-air heat exchangers, etc.

However, there is generally no heat dissipation device for rotating parts such as the hub, and the existing technology uses electric energy to drive the flow of air, so there is a problem of high heat dissipation cost caused by self-consumption of electricity. However, if the heat in the cabin and the hub is not discharged in time, it will affect the life and safety and reliability of the device.

Summary of the invention

The embodiment of the present application provides a wind turbine generator set that can react with external natural wind to form airflow, and can dissipate heat to the nacelle and the hub at the same time, thereby reducing electric energy drive and saving electricity costs during heat dissipation.

According to an embodiment of the present application, a wind turbine generator set is proposed, including a nacelle, a hub and an air induction member, the nacelle including a nacelle cover, the nacelle cover is provided with an air inlet and a first air outlet, the first air outlet and the air inlet are spaced apart from each other; the hub is connected to the nacelle, and the hub is provided with a second air outlet; the air induction member is arranged at the first air outlet, the natural wind outside the nacelle cover can drive the air induction member to rotate and suck the inner cavity of the nacelle cover, so that a first airflow and a second airflow are formed at the air inlet under the action of negative pressure; wherein the first airflow flows through the nacelle and is discharged from the first air outlet, and the second airflow flows through the hub and is discharged from the second air outlet.

According to one aspect of an embodiment of the present application, the air inlet and the first air outlet are arranged on both sides of the cabin cover opposite to each other, and the first airflow passes through the cabin and is discharged.

According to one aspect of an embodiment of the present application, the cabin cover includes a top plate and a bottom plate that are relatively arranged in its own height direction, the air inlet is arranged on the bottom plate and the first air outlet is arranged on the top plate, and the air inlet is located outside the cabin cover and connected to the top plate, so that the first airflow flows from the bottom plate to the top plate along the height direction.

According to one aspect of an embodiment of the present application, the wind turbine generator set includes a main shaft device, which is arranged in the nacelle cover and connected to the hub. The second airflow passes through the main shaft device and the hub in sequence and is discharged from the second air outlet.

According to one aspect of an embodiment of the present application, the spindle device includes a rotating shaft and is connected to the wheel hub through the rotating shaft. The rotating shaft is a hollow shaft structure and has a cavity that penetrates along its own axial direction. A ventilation hole is provided on the rotating shaft and is connected to the cavity. The second airflow enters the cavity through the ventilation hole and flows to the wheel hub and then is discharged.

According to one aspect of an embodiment of the present application, the spindle device includes a fixing member and a connecting member connected between the rotating shaft and the fixing member, a ventilation gap is formed between the rotating shaft and the fixing member, the fixing member has a guide hole and is connected to the ventilation gap, and the second airflow flows from the guide hole through the ventilation gap, the connecting member and the ventilation hole in sequence and then enters the cavity.

According to one aspect of an embodiment of the present application, the wind turbine generator set further includes a guide channel, one end of the guide channel is connected to the air inlet and the other end is connected to the guide hole, and the second airflow flows through the guide channel and enters the ventilation gap.

According to one aspect of an embodiment of the present application, the wind turbine generator set further includes a first air guide member, which is disposed at the air guide hole and is configured to guide the second airflow through the air guide hole into the ventilation gap.

According to one aspect of the embodiment of the present application, the wheel hub has a accommodating cavity, the wheel hub is connected to the rotating shaft and the accommodating cavity is communicated with the cavity, and the second airflow flows from the cavity to the accommodating cavity and then is discharged from the second air outlet.

According to one aspect of the embodiment of the present application, the wheel hub has a second air outlet extending axially therethrough, and the second airflow is discharged in sequence through the cavity, the accommodating cavity and the second air outlet along the axial direction.

According to one aspect of an embodiment of the present application, the wind turbine generator set further includes a second air guide member, which is disposed at the second air outlet and is configured to guide the second airflow to be discharged from the accommodating cavity through the second air outlet.

According to one aspect of the embodiment of the present application, the hub includes a connecting plate having a manhole opening, and the second flow guide is connected to the connecting plate and spaced apart from the manhole opening.

According to one aspect of an embodiment of the present application, the wind turbine generator set also includes a check member, which is arranged at at least one of the first air outlet and the second air outlet, and the check member is configured to open when the airflow flows from the inside to the outside in the nacelle cover or to close when the airflow is stationary.

According to one aspect of an embodiment of the present application, the check member includes a movable member having a fixed portion and a rotating portion, the movable member is connected to the air outlet through the fixed portion, and the rotating portion is connected to the fixed portion and can rotate relative to the fixed portion.

According to one aspect of the embodiment of the present application, the check member includes two or more movable members, the two or more movable members are arranged side by side and have a first state and a second state;

In the first state, a flow opening is formed between the rotating portion of any movable member and the fixed portion of the adjacent movable member, and air flow can be discharged through the flow opening;

In the second state, the rotating portion of any movable member overlaps the fixed portion of an adjacent movable member, so that the movable member closes the air outlet.

According to one aspect of an embodiment of the present application, the induced draft member includes an induced draft wheel and an induced draft duct, the induced draft member is connected to the first air outlet through the induced draft duct, the induced draft wheel is arranged on the induced draft duct, and the induced draft wheel can rotate relative to the induced draft duct to allow the first airflow to be discharged through the induced draft duct.

According to one aspect of an embodiment of the present application, the induced draft wheel includes a central axis and induced draft blades arranged successively around the central axis, the central axis is inserted into the induced draft duct, and the adjacent induced draft blades are staggered with each other and have a step difference, and natural wind can drive the induced draft blades to rotate so that the induced draft wheel rotates around the central axis.

According to one aspect of the embodiment of the present application, the wind turbine generator set further includes a deflector, which is arranged to cover the hub and has an air outlet gap between the deflector and the hub, and the second airflow discharged from the second air outlet is discharged through the air outlet gap;

And/or, the wind turbine generator set further comprises a barrier, which is arranged at the air inlet to separate the first airflow and the second airflow formed at the air inlet;

And/or, the wind turbine generator set further includes a filter element, which is disposed at the air inlet and is configured to filter impurities in the first airflow and the second airflow.

A wind turbine generator set provided in an embodiment of the present application is provided with a first air outlet on the nacelle cover and a second air outlet on the hub, so that the first airflow and the second airflow are discharged from the two air outlets respectively, thereby achieving simultaneous heat dissipation of the nacelle and the hub, and by providing an air induction member, the principle of forming a negative pressure in the inner cavity of the nacelle cover by rotating in coordination with the external natural wind is utilized to allow the external airflow to enter the interior of the nacelle, thereby forming the first airflow and the second airflow, and adopting a natural drive mode to reduce the airflow formed under the drive of electric energy, and finally saving the overall electricity cost on the basis of achieving simultaneous heat dissipation of the nacelle and the hub. In addition, the airflow volume formed by the rotation of the air induction member will increase with the increase of the external wind speed, and is positively correlated with the unit capacity and the heat dissipation demand, so that the drive mode forms an adaptive match with the unit capacity and the heat dissipation demand without the control of the electric control system, thereby reducing the setting of the electric control device.

BRIEF DESCRIPTION OF THE DRAWINGS

The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG1 is a schematic diagram of heat dissipation of a wind turbine generator set according to an embodiment of the present application;

FIG2 is a schematic diagram of heat dissipation of another wind turbine generator set according to an embodiment of the present application;

FIG3 is a schematic structural diagram of a non-return member in a first state according to an embodiment of the present application;

FIG4 is a schematic structural diagram of the anti-return member of the embodiment of the present application in a second state;

FIG5 is a schematic structural diagram of an air inducing member according to an embodiment of the present application;

FIG. 6 is a top view schematic diagram of the air inducing member according to an embodiment of the present application.

Reference numerals:

100- wind turbine generator set;

101-first airflow; 102-second airflow; M-first state; N-second state;

10-cabin; 11-cabin cover; 12-top plate; 13-bottom plate;

1-first air outlet; 2-second air outlet; 3-air inlet; 4-ventilation hole; 5-flow guide hole; 6-flow guide channel; 7-first flow guide member; 8-second flow guide member; 9-air outlet gap;

20-wheel hub; 21-connecting plate; 22-accommodating cavity;

30-inducing member; 31-inducing wheel; 32-inducing pipe; 33-central axis; 34-inducing blade;

40-spindle device; 41-rotating shaft; 42-cavity; 43-fixing member; 44-connecting member; 45-ventilation gap;

50-check piece; 51-movable piece; 52-fixed part; 53-rotating part; 54-flow port;

60- air deflector; 70- barrier element; 80- filter element.

In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale.

Detailed ways

The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least part of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

In order to better understand the present application, the wind turbine generator set according to the embodiment of the present application is described in detail below with reference to FIGS. 1 to 6 .

Please refer to Figure 1. A wind turbine generator set 100 provided in an embodiment of the present application includes a nacelle 10, a hub 20 and an air induction member 30. The nacelle 10 includes a nacelle cover 11, and the nacelle cover 11 is provided with an air inlet 3 and a first air outlet 1, and the first air outlet 1 and the air inlet 3 are spaced apart from each other; the hub 20 is connected to the nacelle 10, and the hub 20 is provided with a second air outlet 2; the air induction member 30 is arranged at the first air outlet 1, and the natural wind outside the nacelle cover 11 can drive the air induction member 30 to rotate and suck the inner cavity of the nacelle cover 11, so that a first airflow 101 and a second airflow 102 are formed at the air inlet 3 under the action of negative pressure; wherein, the first airflow 101 flows through the nacelle 10 and is discharged from the first air outlet 1, and the second airflow 102 flows through the hub 20 and is discharged from the second air outlet 2.

In this embodiment, the wind turbine generator set 100 can be a direct-drive wind turbine generator set 100 or a semi-direct-drive wind turbine generator set 100, and can be provided with an air induction member 30 and can dissipate heat from the nacelle 10 and the hub 20 at the same time through the air induction member 30.

Optionally, the wind turbine generator set 100 in this embodiment can be applied to a land environment or an offshore environment, and there is no special limitation on the specific application environment.

A semi-direct-drive wind turbine generator set 100 is used as an example for explanation, in which the nacelle 10 is isolated and protected from the outside world by a nacelle cover 11, and the inner cavity of the nacelle cover 11 is connected with a main shaft device 40, a gear box and a generator in sequence, and there is also an electrical cabinet inside. The hub 20 is located outside the nacelle cover 11 and is connected to the main shaft device 40. The external wind force causes the blades and the hub 20 to rotate, thereby driving the rotating shaft 41 in the main shaft device 40 to rotate.

In this embodiment, it is necessary to open an air inlet 3 and a first air outlet 1 on the above-mentioned cabin cover 11. Optionally, the air inlet 3 and the first air outlet 1 can be opened one by one and distributed at intervals. The specific setting positions may not be limited, but it is necessary to ensure that the formed airflow flows fully inside the entire cabin 10 to prevent the airflow entering from the air inlet 3 from being directly discharged from the first air outlet 1, which cannot form effective heat dissipation for the interior of the cabin 10.

Considering the need to dissipate heat from the wheel hub 20 at the same time, the second air outlets 2 are provided on the wheel hub 20 , and the number and specific positions of the second air outlets 2 are not particularly limited.

In this embodiment, the first airflow 101 and the second airflow 102 are formed to dissipate heat for the nacelle 10 and the hub 20 respectively. The first airflow 101 mainly passes through the main shaft device 40, the gear box, the generator and the electrical cabinet and is discharged from the first air outlet 1. The second airflow 102 mainly passes through the main shaft device 40 and the hub 20 and is discharged from the second air outlet 2. The two airflows can take away the heat generated by each component.

Optionally, a baffle may be provided at the air inlet 3 to achieve flow diversion, or the air flow may be directed into two paths by means of flow diversion, or the air inlet 3 may be provided with two air flows to introduce two air flows respectively.

Optionally, the air induction member 30 can be a turbine exhaust fan, which is connected to the first outlet on the cabin cover 11. When the external natural wind blows towards the air induction member 30, the air induction member 30 can rotate, thereby stirring the surrounding air through the first air outlet 1, so that a negative pressure suction load is formed inside the cabin cover 11. The external ambient air flows under the action of negative pressure, and is sucked into the cabin 10 and the inside of the wheel hub 20 after being sucked in from the air inlet 3 on the cabin cover 11.

When the external natural wind speed increases, the power generation of the wind turbine 100 will increase accordingly, causing the heat dissipation of various components at the nacelle 10 and the hub 20 to increase, and a greater heat dissipation demand must be met. The rotation speed of the set air induced member 30 will also increase, so that more airflow can be sucked in from the outside, increasing the flow rate of the first airflow 101 and the second airflow 102, thereby improving the heat dissipation capacity of the nacelle 10 and the hub 20; conversely, when the external wind speed decreases, the heat dissipation demand decreases, and the airflow driven by the air induced member 30 also decreases, which has a certain adaptive adjustment ability.

The embodiment of the present application provides a wind turbine generator set 100, by setting a first air outlet 1 on the nacelle cover 11 and a second air outlet 2 on the hub 20, so that the first airflow 101 and the second airflow 102 are respectively discharged from the two air outlets, thereby achieving simultaneous heat dissipation of the nacelle 10 and the hub 20, and by setting an air induction member 30, the principle of forming a negative pressure in the inner cavity of the nacelle cover 11 by rotating in coordination with the external natural wind is used to allow the external airflow to enter the interior of the nacelle 10, thereby forming the first airflow 101 and the second airflow 102, and adopting a natural drive mode to avoid the formation of airflow under the drive of electric energy, and finally saving the overall electricity cost on the basis of achieving simultaneous heat dissipation of the nacelle 10 and the hub 20. In addition, the airflow formed by the rotation of the air induction member 30 will increase with the increase of the external wind speed, and is positively correlated with the unit capacity and heat dissipation requirements, so that the drive mode forms an adaptive match with the unit capacity and heat dissipation requirements without the control of the electric control system, reducing the setting of the electric control device.

As an optional embodiment, please continue to refer to FIG. 1 , the air inlet 3 and the first air outlet 1 are arranged on both sides of the nacelle cover 11 opposite to each other, and the first airflow 101 passes through the nacelle 10 and is discharged.

In this embodiment, the air inlet 3 and the first air outlet 1 are arranged opposite to each other in order to allow the first airflow 101 to fully enter the interior of the cabin 10, thereby forming convection and achieving a better heat dissipation effect of the cabin 10.

A wind turbine generator set 100 provided in an embodiment of the present application has an air inlet 3 and a first air outlet 1 relatively arranged on both sides of a nacelle cover 11, so that a first airflow 101 forms convection in the nacelle cover 11 and penetrates the internal gear box, generator and other components, so that the first airflow 101 is fully utilized, heat is transported out by convection, heat accumulation inside is avoided, and better heat dissipation effect is achieved.

As an optional embodiment, please continue to refer to Figure 1. The cabin cover 11 includes a top plate 12 and a bottom plate 13 that are relatively arranged in its own height direction. The air inlet 3 is arranged on the bottom plate 13 and the first air outlet 1 is arranged on the top plate 12. The air inlet 30 is located outside the cabin cover 11 and connected to the top plate 12, so that the first airflow 101 flows from the bottom plate 13 to the top plate 12 along the height direction.

Optionally, based on the relative arrangement of the air inlet 3 and the first air outlet 1, the air inlet 3 is arranged on the bottom plate 13 of the cabin cover 11, and the first air outlet 1 is connected to the air induction member 30 and arranged on the top plate 12 of the cabin cover 11, so that the convection direction formed is from the bottom plate 13 to the top plate 12.

Considering that the first air outlet 1 is arranged on the top plate 12 to provide the air inducing member 30 with better rotation conditions, it is easier to obtain natural wind to achieve rotation at a relatively high position and is not easily blocked by components to reduce the wind speed.

A wind turbine generator set 100 provided in an embodiment of the present application provides a flow direction of a first airflow 101 , and sufficient heat dissipation of the nacelle 10 is achieved by making the first airflow 101 flow from the bottom plate 13 to the top plate 12 .

As an optional embodiment, please continue to refer to Figure 1. The wind turbine generator set 100 includes a main shaft device 40, which is arranged in the nacelle cover 11 and connected to the hub 20. The second airflow 102 passes through the main shaft device 40 and the hub 20 in sequence and is discharged from the second air outlet 2.

In this embodiment, the wheel hub 20 is specifically connected to the main shaft device 40 in the nacelle cover 11 , and the formed second airflow 102 needs to first pass through the main shaft device 40 and then enter the wheel hub 20 , and finally be discharged from the second air outlet 2 .

In a wind turbine generator set 100 provided in an embodiment of the present application, a second airflow 102 is discharged after passing through a main shaft device 40 and a hub 20 in sequence, so that not only the hub 20 but also the main shaft device 40 can be cooled, and the heat dissipation of internal equipment can be more sufficient.

As an optional embodiment, the spindle device 40 includes a rotating shaft 41 and is connected to the hub 20 through the rotating shaft 41. The rotating shaft 41 is a hollow shaft structure and has a cavity 42 that penetrates along its own axial direction. The rotating shaft 41 is provided with a ventilation hole 4 and is connected to the cavity 42. The second airflow 102 enters the cavity 42 through the ventilation hole 4 and flows to the hub 20 and then is discharged.

The spindle device 40 is driven by a rotating shaft 41. Optionally, the rotating shaft 41 can adopt a hollow shaft structure, that is, it has a cavity 42 inside. Therefore, ventilation holes 4 can be set on the surface of the rotating shaft 41 to allow the second airflow 102 to enter the cavity 42 of the rotating shaft 41 through the ventilation holes 4, thereby forming heat dissipation for the rotating shaft 41.

Due to the rotatability of the rotating shaft 41, multiple ventilation holes 4 can be set on the circumferential surface of the rotating shaft 41 to ensure that the second airflow 102 can fully enter the cavity 42 of the rotating shaft 41. The present application does not specifically limit the number and specific positions of the ventilation holes 4 set.

Since the rotating shaft 41 is connected to the hub 20 , the cavity 42 thereof is also in communication with the hub 20 , so the second airflow 102 first passes through the cavity 42 and then flows into the hub 20 .

A wind turbine generator set 100 provided in an embodiment of the present application provides a specific structure of a rotating shaft 41 and a specific direction of a second airflow 102 passing through a main shaft device 40 , thereby fully achieving heat dissipation of the rotating shaft 41 and the hub 20 .

As an optional embodiment, the spindle device 40 includes a fixing member 43 and a connecting member 44 connected between the rotating shaft 41 and the fixing member 43. A ventilation gap 45 is formed between the rotating shaft 41 and the fixing member 43. The fixing member 43 has a guide hole 5 and is connected to the ventilation gap 45. The second airflow 102 flows from the guide hole 5 through the ventilation gap 45, the connecting member 44 and the ventilation hole 4 in sequence and then enters the cavity 42.

The specific structure of the spindle device 40 also includes a fixing member 43 and a connecting member 44. Optionally, the connecting member 44 may be a bearing, and the fixing member 43 may be a fixed shaft seat. The rotating shaft 41 is connected to the fixing member 43 via the connecting member 44 to form the spindle device 40 as a whole.

Optionally, connecting members 44 are disposed at both ends of the rotating shaft 41 to fix it on the fixing member 43 , so that a ventilation gap 45 is formed between the rotating shaft 41 and the fixing member 43 , and the second airflow 102 can flow in the ventilation gap 45 along the circumference of the rotating shaft 41 .

Considering that the shaft 41 will generate heat due to friction with the connecting member 44 when rotating at high speed, the second airflow 102 can flow in the ventilation gap 45, so as to take away the heat from the connecting member 44, thereby achieving simultaneous heat dissipation of the shaft 41, the connecting member 44 and the fixing member 43.

Optionally, a guide hole 5 may be opened on the fixing member 43 so that the second airflow 102 entering the interior of the cabin 10 passes through the guide hole 5 and enters the ventilation gap 45, the cavity 42 and the hub 20 in sequence. Similarly, multiple guide holes 5 may be set on the surface of the fixing member 43.

A wind turbine generator set 100 provided in an embodiment of the present application provides a specific structure of a main shaft device 40 and a specific flow direction of a second airflow 102 in the main shaft device 40, thereby achieving comprehensive heat dissipation of a rotating shaft 41, a connecting member 44 and a fixing member 43, improving the heat dissipation capacity of internal equipment, improving the internal thermal environment, and being beneficial to the operation of the main shaft device 40.

As an optional embodiment, the wind turbine generator set 100 further includes a guide channel 6 , one end of which is connected to the air inlet 3 and the other end of which is connected to the guide hole 5 , and the second airflow 102 flows through the guide channel 6 and enters the ventilation gap 45 .

In this embodiment, a guide channel 6 is connected between the air inlet 3 and the guide hole 5 to guide the direction of the second airflow 102. The guide channel 6 is used to transport the second airflow 102 to the guide hole 5. Optionally, the guide channel 6 can be a ventilation pipe.

A wind turbine generator set 100 provided in an embodiment of the present application sets a guide channel 6 between the air inlet 3 and the guide hole 5, so that the second airflow 102 can flow in a targeted and directional manner, and the flow of the second airflow 102 is concentrated, thereby avoiding the dispersion loss of the second airflow 102 and improving the heat dissipation capacity of the main shaft device 40.

As an optional embodiment, please refer to FIG. 2 , the wind turbine generator set 100 further includes a first air guide 7 , which is disposed at the air guide hole 5 , and is configured to guide the second airflow 102 to pass through the air guide hole 5 and enter the ventilation gap 45 .

Optionally, the first air guide member 7 may be a fan structure, and the first air guide member 7 may be rotated by electric drive, and guide the second airflow 102 to flow toward the first air guide member 7 by utilizing the principle of negative pressure formed after rotation.

The first air guide member 7 is disposed at the air guide hole 5 , so as to guide the second air flow 102 to flow in the air guide channel 6 and enter the ventilation gap 45 of the spindle device 40 toward the air guide hole 5 .

A wind turbine generator set 100 provided in an embodiment of the present application can provide power for the flow of the second airflow 102 by setting a first guide member 7 at the guide hole 5, and can further concentrate the second airflow 102 to form a directional flow, so that the second airflow 102 has a larger air volume entering the main shaft device 40, forming a better heat dissipation effect.

As an optional embodiment, please continue to refer to Figure 2, the hub 20 has a accommodating cavity 22, the hub 20 is connected to the rotating shaft 41 and the accommodating cavity 22 is connected to the cavity 42, and the second air flow 102 flows from the cavity 42 to the accommodating cavity 22 and then is discharged from the second air outlet 2.

Optionally, the hub 20 is a hollow structure and has a accommodating cavity 22, which is connected to the cavity 42 of the rotating shaft 41, providing space for the flow of the second airflow 102, so that the second airflow 102 fills the cavity 42 and the accommodating cavity 22 to take away the internal heat, and is finally discharged from the second air outlet 2 on the surface of the hub 20.

An electrical cabinet is provided in the accommodating cavity 22 of the wheel hub 20 , and the second airflow 102 can pass through the electrical cabinet and take away the heat generated by the electrical cabinet, thereby achieving heat dissipation for the wheel hub 20 .

A wind turbine generator set 100 provided in an embodiment of the present application provides a specific structure of a hub 20 and a direction of a second airflow 102 in the hub 20 , providing a flow space for the second airflow 102 and achieving sufficient heat dissipation of the hub 20 .

As an optional embodiment, the hub 20 has a second air outlet 2 that penetrates along the axial direction, and the second airflow 102 passes through the cavity 42, the accommodating cavity 22 and the second air outlet 2 in sequence along the axial direction and is discharged.

Optionally, the specific position of the second air outlet 2 opened on the hub 20 is in the axial direction of the rotating shaft 41, and the second air outlet 2 is penetrated in the axial direction, so that in the axial direction, the cavity 42 of the rotating shaft 41, the accommodating cavity 22 of the hub 20 and the second air outlet 2 are maintained in the same straight line.

After the second airflow 102 enters the cavity 42 of the rotating shaft 41 , it can maintain a straight flow along the axial direction and flow out through the second air outlet 2 in a straight line.

A wind turbine generator set 100 provided in an embodiment of the present application forms a second air outlet 2 axially through the hub 20, so that the second air flow 102 can be discharged in a straight axial line through the cavity 42, the accommodating cavity 22 and the second air outlet 2, thereby preventing the second air flow 102 from encountering obstacles and accumulating in the hub 20 during flow, thereby reducing its flow resistance and finally being able to smoothly discharge the heat to form effective heat dissipation.

As an optional embodiment, please continue to refer to FIG. 2 , the wind turbine generator set 100 further includes a second air guide 8 , which is disposed at the second air outlet 2 , and is configured to guide the second airflow 102 to be discharged from the accommodating cavity 22 through the second air outlet 2 .

Optionally, the second air guide member 8 is a fan structure, which can be rotated by electric drive and is arranged at the second air outlet 2, so that when it rotates, a negative pressure is formed in the accommodating cavity 22 of the hub 20, and the second airflow 102 in the cavity 42 can flow toward the accommodating cavity 22 of the hub 20.

A wind turbine generator set 100 provided in an embodiment of the present application can provide directional guidance for the direction of the second air flow 102 by setting a second guide member 8 at the second air outlet 2, provide power for the second air flow 102 to enter the hub 20, and enable the air flow to enter the hub 20 more efficiently to remove heat and be quickly discharged from the second air outlet 2.

As an optional embodiment, the hub 20 includes a connecting plate 21 having a manhole opening, and the second flow guide 8 is connected to the connecting plate 21 and spaced apart from the manhole opening.

Optionally, the connecting plate 21 is a non-metallic flame-retardant film structure, and the connecting plate 21 can be fixed to the wheel hub 20 by means of a pressure plate on the outer ring and bolts.

The connecting plate 21 has a manhole opening, and the second flow guide 8 is spaced apart from the manhole opening on the connecting plate 21. Optionally, the second flow guide 8 can be disposed above the manhole opening and separated by a bracket to prevent the second flow guide 8 from affecting the manhole opening and hindering the entry and exit of staff.

When the second air guide 8 rotates, the second air flow 102 is discharged from the second air outlet 2 through the connecting plate 21; when the second air guide 8 is not working, it is located on the connecting plate 21 and can seal the wheel hub 20 together with the connecting plate 21, thus having a sealing effect.

Optionally, the manhole opening located below the second guide member 8 is in the form of a semicircular plate structure, which can be rotatably arranged on the connecting plate 21. The semicircular plate structure can be rotated around the folding line. When the staff enters and exits the hub 20, they can enter the interior by flipping the semicircular plate. The manhole opening is closed by components such as zippers, Velcro or magnets.

A wind turbine generator set 100 provided in an embodiment of the present application can be integrated with the manhole opening by arranging the second guide member 8 and the manhole opening on the connecting plate 21 at intervals. On the premise of completing the smooth exhaust, the space occupied by the second guide member 8 is saved, and the manhole opening is also conducive to the outlet of the second airflow 102.

As an optional embodiment, referring to Figures 2 to 4, the wind turbine generator set 100 also includes a check member 50, which is arranged at at least one of the first air outlet 1 and the second air outlet 2, and the check member 50 is configured to open when the airflow flows from the inside to the outside in the nacelle cover 11 or to close when the airflow is stationary.

Optionally, the check member 50 may be a check air valve, and the check member 50 may be disposed at the first air outlet 1 and/or the second air outlet 2 according to different requirements. The function of the check member 50 is to open when the formed airflow needs to be discharged, and to close when no airflow passes, thereby sealing the interior and protecting the internal equipment.

A wind turbine generator set 100 provided in an embodiment of the present application, by providing a check piece 50 at the air outlet, can achieve smooth discharge of airflow during heat dissipation, and can also achieve sealing protection for the interior of the nacelle 10 and the hub 20 when stationary, having dual-purpose properties and improving overall safety performance.

As an optional embodiment, please continue to refer to Figures 2 to 4. The check member 50 includes a movable member 51. The movable member 51 has a fixed portion 52 and a rotating portion 53. The movable member 51 is connected to the air outlet through the fixed portion 52. The rotating portion 53 is connected to the fixed portion 52 and can rotate relative to the fixed portion 52.

In this embodiment, the check member 50 used is a movable member 51 having a fixed portion 52 and a rotating portion 53. Optionally, the fixed portion 52 can be a valve leaf shaft, and the rotating portion 53 can be a valve leaf. The entire movable member 51 can be fixed at the air outlet through the fixed portion 52, and the rotating portion 53 can rotate around the fixed portion 52, thereby controlling the opening and closing of the air outlet and the size of the opening.

When the airflow is discharged through the air outlet, the airflow will push open the rotating part 53 of the movable part 51, causing the rotating part 53 to rotate 90° around the fixed part 52, thereby opening the air outlet and discharging the airflow; when there is no airflow passing through the air outlet, the rotating part 53 will rotate 90° in the opposite direction under the action of gravity to close, thereby closing the air outlet and preventing it from being disturbed by the outside world.

A wind turbine generator set 100 provided in an embodiment of the present application provides a specific structure and working principle of a check member 50, which has a simple structure. Through the cooperation of a fixed portion 52 and a rotating portion 53, the air outlet is opened when dissipating heat and closed when stationary, thereby timely sealing and protecting the interior of the nacelle 10 and the hub 20.

As an optional embodiment, please refer to FIG. 3 and FIG. 4 , the check member 50 includes more than two movable members 51 , and the more than two movable members 51 are arranged side by side and have a first state M and a second state N;

In the first state M, a flow opening 54 is formed between the rotating portion 53 of any movable member 51 and the fixed portion 52 of the adjacent movable member 51, and the air flow can be discharged through the flow opening 54;

In the second state N, the rotating portion 53 of any movable member 51 overlaps the fixed portion 52 of the adjacent movable member 51 so that the movable member 51 closes the air outlet.

Optionally, a plurality of movable parts 51 may be provided at the air outlet and arranged side by side to form an integral structure, so that each movable part 51 corresponds to a sub-air outlet, making it easier to push open the rotating part 53 to complete the rotation during exhaust, and the exhaust airflow is more uniform and smooth.

The integral movable member 51 has a first state M and a second state N. The first state M is a working state, and the second state N is a non-working state.

When in the first state M, each rotating part 53 is pushed open by the airflow, forming a flow opening 54 between the adjacent fixed part 52, and the airflow is discharged therethrough. Since each rotating part 53 may be affected by the airflow differently, the rotation angle may also be different, thereby forming flow openings 54 of different sizes.

When in the second state N, each rotating portion 53 overlaps the adjacent fixed portion 52 under the action of its own gravity, thereby closing the air outlet and isolating the internal and external environments of the cabin 10.

A wind turbine generator set 100 provided in an embodiment of the present application improves the uniformity of airflow discharge by configuring the check member 50 as a structure of multiple movable parts 51, so that the airflow can be discharged more smoothly, and at the same time, the multiple movable parts 51 can cooperate with each other to jointly complete the opening and closing of the air outlet.

As an optional embodiment, please refer to Figure 5, the air induced member 30 includes an air induced wheel 31 and an air induced pipe 32, the air induced member 30 is connected to the first air outlet 1 through the air induced pipe 32, the air induced wheel 31 is arranged on the air induced pipe 32, and the air induced wheel 31 can rotate relative to the air induced pipe 32 to allow the first airflow 101 to be discharged through the air induced pipe 32.

Optionally, the induced draft member 30 is a turbine exhaust fan, the induced draft wheel 31 corresponds to a turbine, and the induced draft pipe 32 corresponds to a turbine pipe. The induced draft pipe 32 is plugged into the first air outlet 1, and the induced draft wheel 31 is then connected to the induced draft pipe 32. The first airflow 101 is formed by the rotation of the induced draft wheel 31 and discharged from the first air outlet 1.

Specifically, the working principle of the induced draft member 30 is that the natural wind speed of the external environment drives the induced draft wheel 31 to rotate, and the device uses centrifugal force and negative pressure effect to transform the parallel air flow into a vertical air flow from bottom to top. It has no self-power consumption and no noise, and can work to discharge the hot air flow in the cabin 10 as long as there is natural wind from the outside.

A wind turbine generator set 100 provided in an embodiment of the present application provides a specific structure of an induced draft member 30. By providing an induced draft wheel 31 and an induced draft duct 32, the induced draft wheel 31 can be rotated in coordination with external natural wind to form a negative pressure inside the cabin 10, thereby forming an airflow, and the airflow is discharged by the induced draft duct 32, thereby realizing self-driven, power-free heat dissipation of the cabin 10 and saving the electricity cost for heat dissipation.

As an optional embodiment, please refer to Figures 5 and 6, the induced draft wheel 31 includes a central axis 33 and induced draft blades 34 arranged successively around itself, the central axis 33 is inserted into the induced draft duct 32, and the adjacent induced draft blades 34 are staggered with each other and have a step difference. Natural wind can drive the induced draft blades 34 to rotate so that the induced draft wheel 31 rotates around the central axis 33.

Optionally, the induced draft wheel 31 specifically includes a central axis 33 and a plurality of induced draft blades 34. The induced draft wheel 31 always rotates around the central axis 33. The induced draft blades 34 can be staggered relative to each other to form a step-like step difference structure. External natural wind can cross-cut and blow toward the step difference formed between the induced draft blades 34, thereby driving the rotation of the induced draft wheel 31.

Optionally, the central shaft 33 is fixedly inserted into the induced draft pipe 32 so that the induced draft wheel 31 is connected to the induced draft pipe 32 , and the central shaft 33 is connected to the rotating induced draft wheel 31 via a bearing.

A wind turbine generator set 100 provided in an embodiment of the present application can better capture external natural wind and drive the induced draft wheel 31 to rotate by setting induced draft blades 34 on the induced draft wheel 31, thereby forming a stronger driving force, making the induced draft wheel 31 easier to rotate and forming a negative pressure area inside the cabin 10, thereby improving the heat dissipation capacity.

As an optional embodiment, the wind turbine generator set 100 further includes a deflector 60, which covers the hub 20 and has an air outlet gap 9 between the deflector 60 and the hub 20, and the second airflow 102 discharged from the second air outlet 2 is discharged through the air outlet gap 9;

And/or, the wind turbine generator set 100 further includes a barrier 70, which is disposed at the air inlet 3 to separate the first airflow 101 and the second airflow 102 at the air inlet 3;

And/or, the wind turbine generator set 100 further includes a filter element 80 , which is disposed at the air inlet 3 , and is configured to filter impurities in the first airflow 101 and the second airflow 102 .

Optionally, a layer of air deflector 60 can be set on the outer surface of the hub 20 to isolate and protect the hub 20. There is an air outlet gap 9 between the air deflector 60 and the hub 20. After flowing through the second air outlet 2, the second air flow 102 enters the air deflector 60 and is finally discharged into the external environment through the air outlet gap 9.

Optionally, the blocking member 70 may be a partition structure, which is disposed at the air inlet 3 to separate the air inlet 3 to form two sub-air inlets, so as to divert the airflow and form the first airflow 101 and the second airflow 102 .

Considering that the first airflow 101 and the second airflow 102 entering from the air inlet 3 may affect the equipment inside the cabin 10, it is necessary to ensure that the airflow entering the interior is dry and clean. Therefore, a filter element 80 can be set at the air inlet 3 to filter and dry the first airflow 101 and the second airflow 102.

According to different actual needs, the filtered airflow is divided into different filtering levels, including primary efficiency filtration and medium efficiency filtration, etc. Optionally, the filter element 80 can be a primary efficiency filter, a medium efficiency filter, or both in turn to achieve filtration.

When the wind turbine 100 is used in an onshore environment, it is mainly a purification process to filter out pollutants and impurities in the airflow. However, for an offshore environment, the influence of water vapor and salt spray must also be considered. Therefore, dehumidification and drying processes are also required to ensure that the overall airflow is dry and clean.

A wind turbine generator set 100 provided in an embodiment of the present application can isolate and protect the hub 20 by providing a deflector 60 without affecting the discharge of the second airflow 102. The airflow can be filtered by providing a filter element 80 to ensure the cleanliness of the airflow, provide safety protection for the equipment inside the cabin 10, avoid being damaged by impurities, ensure the service life of the equipment, and improve the reliability of the overall operation.

The embodiment of the present application provides a wind turbine generator set 100, by setting a first air outlet 1 on the nacelle cover 11 and a second air outlet 2 on the hub 20, so that the first airflow 101 and the second airflow 102 are respectively discharged from the two air outlets, thereby achieving simultaneous heat dissipation of the nacelle 10 and the hub 20, and by setting an air induction member 30, the principle of forming a negative pressure in the inner cavity of the nacelle cover 11 by rotating in coordination with the external natural wind is used to allow the external airflow to enter the interior of the nacelle 10, thereby forming the first airflow 101 and the second airflow 102, and adopting a natural drive mode to avoid the formation of airflow under the drive of electric energy, and finally saving the overall electricity cost on the basis of achieving simultaneous heat dissipation of the nacelle 10 and the hub 20. In addition, the airflow formed by the rotation of the air induction member 30 will increase with the increase of the external wind speed, and is positively correlated with the unit capacity and heat dissipation requirements, so that the drive mode forms an adaptive match with the unit capacity and heat dissipation requirements without the control of the electric control system, reducing the setting of the electric control device.

Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (18)

1. A wind power generator set (100), characterized by comprising:

the engine room (10) comprises an engine room cover (11), wherein an air inlet (3) and a first air outlet (1) are arranged on the engine room cover (11), and the first air outlet (1) and the air inlet (3) are distributed at intervals;

a hub (20) connected to the nacelle (10), the hub (20) being provided with a second air outlet (2);

the air inducing piece (30) is arranged at the first air outlet (1), and natural wind outside the cabin cover (11) can drive the air inducing piece (30) to rotate and suck the inner cavity of the cabin cover (11), so that a first air flow (101) and a second air flow (102) are formed at the air inlet (3) under the action of negative pressure;

wherein the first air flow (101) flows through the nacelle (10) and is discharged from the first air outlet (1), and the second air flow (102) flows through the hub (20) and is discharged from the second air outlet (2).

2. Wind power plant (100) according to claim 1, wherein the air inlet (3) is arranged opposite to the first air outlet (1) on both sides of the nacelle cover (11), the first air flow (101) being discharged after passing through the nacelle (10).

3. Wind power generator unit (100) according to claim 2, characterized in that the nacelle cover (11) comprises a top plate (12) and a bottom plate (13) arranged opposite to each other in the height direction thereof, the air inlet (3) is arranged at the bottom plate (13) and the first air outlet (1) is arranged at the top plate (12), and the air guide (30) is arranged outside the nacelle cover (11) and connected to the top plate (12) so that the first air flow (101) flows from the bottom plate (13) to the top plate (12) in the height direction.

4. Wind power plant (100) according to claim 1, characterized in that the wind power plant (100) comprises a main shaft device (40), the main shaft device (40) being arranged in the nacelle cover (11) and being connected to the hub (20), the second air flow (102) being discharged from the second air outlet (2) after passing the main shaft device (40) and the hub (20) in sequence.

5. Wind generating set (100) according to claim 4, characterized in that the spindle means (40) comprises a rotating shaft (41) and is connected with the hub (20) by the rotating shaft (41), the rotating shaft (41) is of hollow shaft structure and is provided with a cavity (42) penetrating along the axial direction of the rotating shaft (41), the rotating shaft (41) is provided with a ventilation hole (4) and is communicated with the cavity (42), and the second air flow (102) enters the cavity (42) from the ventilation hole (4) and flows to the hub (20) and then is discharged.

6. The wind turbine (100) of claim 5, wherein the main shaft device (40) comprises a fixing member (43) and a connecting member (44) connected between the rotating shaft (41) and the fixing member (43), a ventilation gap (45) is formed between the rotating shaft (41) and the fixing member (43), the fixing member (43) is provided with a diversion hole (5) and is communicated with the ventilation gap (45), and the second air flow (102) sequentially flows through the ventilation gap (45), the connecting member (44) and the ventilation hole (4) from the diversion hole (5) and then enters the cavity (42).

7. The wind power generator set (100) according to claim 6, wherein the wind power generator set (100) further comprises a diversion channel (6), one end of the diversion channel (6) is connected with the air inlet (3) and the other end is connected with the diversion hole (5), and the second air flow (102) enters the ventilation gap (45) after flowing through the diversion channel (6).

8. The wind power plant (100) according to claim 6, wherein the wind power plant (100) further comprises a first deflector (7), the first deflector (7) being arranged at the deflector aperture (5), the first deflector (7) being configured to direct the second air flow (102) through the deflector aperture (5) into the ventilation gap (45).

9. The wind power generator set (100) of claim 5, wherein the hub (20) has a receiving cavity (22), the hub (20) is connected to the shaft (41) and the receiving cavity (22) is in communication with the cavity (42), and the second air flow (102) flows from the cavity (42) to the receiving cavity (22) and then is discharged from the second air outlet (2).

10. The wind power plant (100) according to claim 9, wherein the hub (20) has the second air outlet (2) extending therethrough in the axial direction, the second air flow (102) being discharged through the cavity (42), the receiving cavity (22) and the second air outlet (2) in this order in the axial direction.

11. The wind power plant (100) according to claim 9, wherein the wind power plant (100) further comprises a second deflector (8), the second deflector (8) being arranged at the second air outlet (2), the second deflector (8) being configured to direct the second air flow (102) to be discharged from the receiving cavity (22) through the second air outlet (2).

12. Wind power plant (100) according to claim 11, wherein the hub (20) comprises a connection plate (21), the connection plate (21) having a manhole opening therein, the second deflector (8) being connected to the connection plate (21) and being arranged at a distance from the manhole opening.

13. Wind park (100) according to any of claims 1-12, wherein the wind park (100) further comprises a check (50), the check (50) being arranged at least one of the first air outlet (1) and the second air outlet (2), the check (50) being configured to open when an air flow flows inside-out in the nacelle cover (11) or to close when an air flow is stationary.

14. The wind turbine (100) of claim 13, wherein the non-return element (50) comprises a movable element (51), the movable element (51) has a fixed portion (52) and a rotating portion (53), the movable element (51) is connected to the air outlet through the fixed portion (52), and the rotating portion (53) is connected to the fixed portion (52) and is rotatable relative to the fixed portion (52).

15. The wind power plant (100) according to claim 14, wherein the non-return element (50) comprises more than two movable elements (51), the more than two movable elements (51) being arranged side by side and having a first state (M) and a second state (N);

in the first state (M), a through-flow port (54) is formed between the rotating part (53) of any movable piece (51) and the fixed part (52) of the adjacent movable piece (51), and air flow can be discharged through the through-flow port (54);

in the second state (N), the rotating portion (53) of any movable member (51) is overlapped with the fixed portion (52) of the adjacent movable member (51), so that the movable member (51) seals the air outlet.

16. Wind generating set (100) according to any of claims 1 to 12, characterized in that the wind guiding member (30) comprises a wind guiding wheel (31) and a wind guiding pipe (32), the wind guiding member (30) is connected with the first wind outlet (1) through the wind guiding pipe (32), the wind guiding wheel (31) is arranged on the wind guiding pipe (32), and the wind guiding wheel (31) can rotate relative to the wind guiding pipe (32) so that the first air flow (101) is discharged through the wind guiding pipe (32).

17. Wind generating set (100) according to claim 16, characterized in that the wind guiding wheel (31) comprises a central shaft (33) and wind guiding blades (34) which are arranged in succession around the circumference of the wind guiding wheel, the central shaft (33) is inserted into the wind guiding pipe (32), the wind guiding blades (34) which are arranged adjacently are staggered with each other with a step, and the natural wind can drive the wind guiding blades (34) to rotate so that the wind guiding wheel (31) rotates around the central shaft (33).

18. The wind power generator set (100) according to any one of claims 1 to 12, wherein the wind power generator set (100) further comprises a nacelle (60), the nacelle (60) being arranged to cover the hub (20) with an air outlet gap (9) between the nacelle and the hub (20), the second air flow (102) being discharged from the second air outlet (2) being discharged through the air outlet gap (9);

and/or, the wind generating set (100) further comprises a blocking piece (70), wherein the blocking piece (70) is arranged at the air inlet (3) to separate the air inlet (3) to form the first air flow (101) and the second air flow (102);

and/or the wind power generator set (100) further comprises a filter (80), the filter (80) is arranged at the air inlet (3), and the filter (80) is configured to filter impurities in the first air flow (101) and the second air flow (102).