Wind wheel side filtering type sand-proof structure of wind driven generator
Through the wind turbine side filter-proof structure, the wind and sand barrier and filter combined with the negative pressure device are used to solve the problem of wind and sand intrusion and interference in the wind and sand prevention structure of the wind and sand, and achieve better air circulation and temperature control effects.
Patent Information
- Application Number
- CN202420743334.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-11
AI Technical Summary
During operation, the wind-proof sand structure of existing wind turbines is affected by the relative movement of the transmission shaft and the fixed structure in the cabin, which leads to the risk of wind-sand intrusion and interference collision, affecting air circulation and temperature control.
Design a wind wheel side filter type wind-proof sand structure, which connects the wind wheel to the cabin through the wind wheel and the sand baffle and filter, and uses a negative pressure device to realize air circulation and dust filtration, avoiding relative movement and interference risks, ensuring that the wind wheel and Synchronous rotation of the drive shaft.
Effectively prevent wind and sand from invading, ensure air circulation between the wind turbine and cabin, avoid heat accumulation, take into account both the air circulation and the anti-sand and dust effect, and is suitable for hot sand and dust areas.
Smart Images
Figure CN222141448U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of wind-driven generator wind-sand prevention, and relates to a wind-driven generator wind wheel side filtering type wind-sand prevention structure. Background Art
[0002] A reasonable wind turbine anti-sand structure needs to filter the dust in the air while ensuring a certain air flow to achieve temperature control of the space inside the wind turbine and the cabin. At present, the wind turbine anti-sand structure is mostly concentrated on the cabin side and is extended and fixed through the cabin cover or cabin structure. Under ideal conditions, low-temperature air containing dust enters the internal space from the blade mouth or the local gap at the front end of the wind turbine and reaches the cabin side baffle. The filter device on the baffle blocks the entry of dust while ensuring air circulation to achieve heat dissipation and cooling. In actual situations, since there is relative movement between the drive shaft and the wind and sand fixed structure in the cabin when the wind turbine is running, a safety gap needs to be left in the design. These necessary gaps become the intrusion points of wind and sand, and some of the drive shafts have irregular lock plate structures on the outside, which have a greater risk of interference and collision with the wind and sand structure on the cabin side after operation. Utility Model Content
[0003] The purpose of the utility model is to provide a wind turbine rotor side filtering type wind and sand prevention structure in order to overcome at least one defect of the above-mentioned prior art cabin side wind and sand prevention structure. The utility model has a better wind and sand prevention effect.
[0004] The purpose of the utility model can be achieved through the following technical solutions:
[0005] One of the technical solutions of the utility model is to provide a wind turbine rotor side filtering type wind and sand protection structure, which includes a wind rotor, a nacelle and a wind and sand baffle, wherein the wind rotor is connected to the nacelle, the wind rotor includes a hub and a fairing, the hub is located inside the fairing, a wind and sand baffle is arranged between the hub and the fairing, and a filter is arranged on the wind and sand baffle.
[0006] Furthermore, an interface is provided on the wheel hub or the air deflector, and the wind and sand baffle is arranged on the interface and supported by the wheel hub or the air deflector.
[0007] Furthermore, the filter includes a filter mesh or filter cotton.
[0008] Furthermore, blades are arranged on the hub.
[0009] Furthermore, a blade opening is provided on the air guide cover, and the root of the blade extends out of the air guide cover from the hub through the blade opening.
[0010] Furthermore, the external air containing sand and dust enters the interlayer between the guide cover and the hub from the blade opening on the wind wheel, taking away the heat generated by the operation of the components in the hub;
[0011] When the air passes through the wind and sand baffle, the filter on the wind and sand baffle filters the sand and dust, and the filtered air continues to flow toward the cabin side.
[0012] Furthermore, a generator and a transmission shaft are arranged in the nacelle, one end of the transmission shaft is connected to the generator, and the other end of the transmission shaft passes through the side wall of the nacelle and is connected to the wind wheel.
[0013] Furthermore, an air outlet is provided on the side wall of the cabin, and a negative pressure device is provided at the air outlet.
[0014] Furthermore, the air flows from the wind wheel side to the nacelle side under the negative pressure of the negative pressure device and is discharged from the air outlet.
[0015] Furthermore, the negative pressure device adopts an exhaust fan.
[0016] One of the technical solutions of the utility model is to provide a method for using the wind turbine rotor side filtering type wind and sand protection structure, the method comprising the following steps:
[0017] External air containing sand and dust enters the interlayer between the guide cover and the hub from the blade opening on the wind wheel. Since there is a negative pressure device on the cabin side, the air flows toward the cabin side under the negative pressure and takes away the heat generated by the operation of the components in the hub. When the air passes through the wind and sand baffle, the filter on the wind and sand baffle will play a role and filter the sand and dust. After passing through the filter, the air continues to flow toward the cabin side, taking into account both sand and dust prevention and internal space temperature control.
[0018] When the fan is stopped, lock the wind wheel, and the staff squats at the interface between the cabin and the wind wheel on the side of the machine to remove the filter with accumulated sand and dust from the sand baffle, so that the new filter can be easily replaced.
[0019] Compared with the prior art, the utility model has the following beneficial effects:
[0020] (1) When the fan of the utility model is in operation, air circulation between the wind wheel and the nacelle is ensured to avoid heat accumulation in the hub and inability to dissipate heat;
[0021] (2) The utility model designs a wind and sand baffle on one side of the wind wheel. When the wind turbine is running, the wind wheel drives the transmission shaft to rotate together. There is no relative movement or locking plate structure between the two. Therefore, there is no risk of interference between the wind and sand baffle and the transmission chain, etc. There is no risk of interference between the wind and sand baffle and surrounding components (wheel hub / fairing / transmission shaft). Since there is no relative movement, there is no need to reserve a safety gap between the structures, which has a better effect of preventing wind and sand from intrusion.
[0022] (3) The utility model is suitable for wind turbines in hot and dusty areas, and the internal space of the wind wheel-cabin can take into account both air circulation and dust prevention. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of a wind turbine rotor side filtering type wind and sand protection structure in an embodiment of the utility model.
[0024] Description of the markings in the figure:
[0025] 1—wind wheel, 2—nacelle, 3—hub, 4— fairing, 5—wind and sand baffle, 6—blades, 7—blade opening, 8—drive shaft, 9—air outlet. DETAILED DESCRIPTION
[0026] The present invention is described in detail below in conjunction with specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0027] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are used to describe common objects, and only refer to different instances of the same object, and are not intended to imply that the objects described in this way must adopt a given order, whether in time, space, order or any other manner.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" 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 a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] Example:
[0030] A wind turbine rotor side filtering type wind and sand protection structure, such as Figure 1 As shown, the wind wheel 1 includes a wind wheel 1, a nacelle 2 and a wind and sand baffle 5. The wind wheel 1 is connected to the nacelle 2. The wind wheel 1 includes a hub 3 and a shroud 4. The hub 3 is located inside the shroud 4. A wind and sand baffle 5 is provided between the hub 3 and the shroud 4. A filter is provided on the wind and sand baffle 5.
[0031] The wheel hub 3 or the air deflector 4 is provided with an interface, and the wind and sand baffle 5 is provided on the interface and supported by the wheel hub 3 or the air deflector 4. In this embodiment, the wheel hub 3 is provided with an interface, and the wind and sand baffle 5 is provided on the interface and supported by the wheel hub 3;
[0032] The filter can be a filter net or filter cotton, and in this embodiment, a filter net is preferred;
[0033] The hub 3 is provided with blades 6;
[0034] The air guide cover 4 is provided with a blade opening 7, and the root of the blade 6 extends out of the air guide cover 4 from the hub 3 through the blade opening 7;
[0035] External air containing sand and dust enters the interlayer between the guide cover 4 and the hub 3 from the blade opening 7 on the wind wheel 1, taking away the heat generated by the operation of the components in the hub 3;
[0036] When the air passes through the wind and sand baffle 5, the filter on the wind and sand baffle 5 filters the sand and dust, and the filtered air continues to flow to the side of the cabin 2;
[0037] A generator and a transmission shaft 8 are arranged in the nacelle 2. One end of the transmission shaft 8 is connected to the generator, and the other end passes through the side wall of the nacelle 2 and is connected to the wind wheel 1.
[0038] The side wall of the cabin 2 is provided with an air outlet 9, and a negative pressure device is provided at the air outlet 9;
[0039] The air flows from the wind wheel 1 side to the nacelle 2 side under the negative pressure of the negative pressure device and is discharged from the air outlet 9;
[0040] In this embodiment, the negative pressure device is an exhaust fan.
[0041] The method for using the above-mentioned wind turbine rotor side filtering type wind and sand protection structure comprises the following specific steps:
[0042] External air containing sand and dust enters the interlayer between the guide cover 4 and the hub 3 from the blade opening 7 on the wind wheel 1. Since there is a negative pressure device on the side of the cabin 2, the air flows to the side of the cabin 2 under the action of negative pressure and takes away the heat generated by the operation of the components in the hub 3. When the air passes through the wind and sand baffle 5, the filter on the wind and sand baffle 5 will play a role and filter the sand and dust. After passing through the filter, the air continues to flow to the side of the cabin 2, taking into account both sand and dust prevention and internal space temperature control;
[0043] When the fan is in shutdown state, the wind wheel 1 is locked, and a person squats at the interface between the nacelle 2 and the wind wheel 1 on the side of the nacelle 2 to remove the filter with accumulated sand and dust from the sand baffle 5, so that a new filter can be easily replaced.
[0044] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.
Claims
1. A wind turbine rotor side filtering type wind and sand protection structure, characterized in that: The structure comprises a wind wheel (1), a nacelle (2) and a wind and sand baffle (5), wherein the wind wheel (1) is connected to the nacelle (2), the wind wheel (1) comprises a hub (3) and a fairing (4), the hub (3) is located inside the fairing (4), a wind and sand baffle (5) is arranged between the hub (3) and the fairing (4), and a filter is arranged on the wind and sand baffle (5).
2. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 1, characterized in that: The wheel hub (3) or the air deflector (4) is provided with an interface, and the wind and sand baffle (5) is arranged on the interface and supported by the wheel hub (3) or the air deflector (4).
3. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 1, characterized in that: The filter comprises a filter net or filter cotton.
4. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 1, characterized in that: Blades (6) are arranged on the hub (3).
5. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 4, characterized in that: The air guide cover (4) is provided with a blade opening (7), and the root of the blade (6) extends from the hub (3) through the blade opening (7) and out of the air guide cover (4).
6. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 5, characterized in that: External air containing sand and dust enters the interlayer between the guide cover (4) and the hub (3) from the blade opening (7) on the wind wheel (1), and takes away the heat generated by the operation of the components in the hub (3); When the air passes through the wind and sand baffle (5), the filter on the wind and sand baffle (5) filters the sand and dust, and the filtered air continues to flow toward the cabin (2).
7. A wind turbine rotor side filtering sand-proof structure according to claim 1, characterized in that: A generator and a transmission shaft (8) are arranged in the nacelle (2); one end of the transmission shaft (8) is connected to the generator, and the other end of the transmission shaft (8) passes through the side wall of the nacelle (2) and is connected to the wind wheel (1).
8. The wind turbine rotor side filtering sand-proof structure according to claim 1, characterized in that: An air outlet (9) is provided on the side wall of the cabin (2), and a negative pressure device is provided at the air outlet (9).
9. A wind turbine rotor side filtering type sand and dust prevention structure according to claim 8, characterized in that: Under the action of the negative pressure of the negative pressure device, the air flows from the wind wheel (1) side to the cabin (2) side and is discharged from the air outlet (9).
10. A wind turbine rotor side filtering sand and dust prevention structure according to claim 8, characterized in that: The negative pressure device adopts an exhaust fan.