CN215486399U - Wind generating set blade lightning protection structure - Google Patents

Abstract

The utility model provides a lightning protection structure for blades of a wind generating set, and relates to the field of wind power generation devices. The utility model has simple and effective structure, can prevent the cover plate from loosening only through the structure of the U-shaped bolt, and avoids the problem that colloidal particles in the paddle fall into the hub bearing. The grounding wire is fixed in a moving mode, so that the problem of fatigue fracture of the grounding wire due to suspension vibration can be avoided, and the service life of the grounding wire is greatly prolonged.

Description

Wind generating set blade lightning protection structure

Technical Field

The application relates to the field of wind power generation devices, in particular to a lightning protection structure for a blade of a wind generating set.

Background

In the field of wind power generation devices, a fixing mode of a manhole cover plate of a blade is usually fixed by a single-head bolt, the interior of the blade is filled with more glue in the production and manufacturing process, the falling colloidal particles need to be cleaned regularly in the subsequent unit operation process, and the bolt is loosened due to long-time operation vibration of equipment, for example, the bolt can be connected with a shaft to rotate when being fastened, so that the bolt cannot be screwed down, and the colloidal particles in the blade fall into the hub through a gap of the manhole cover plate. And the grounding wire from the paddle to the engine room is fixed by adopting a soft copper elastic rope or a plurality of strands of soft copper grounding wires, the fixing mode is that the soft copper elastic rope or the strands of soft copper grounding wires are suspended and fixed in the hub, the grounding wire works due to fatigue of the grounding wire caused by long-time operation and vibration of the unit, and the condition that the grounding wire is broken due to fatigue or the fixed end is broken frequently occurs, so that the unit is in a fault shutdown state.

SUMMERY OF THE UTILITY MODEL

An object of this application provides a wind generating set blade lightning protection structure, it is not enough to prior art problem, realizes preventing the not hard up problem of manhole cover board fixing bolt, can prevent simultaneously that the earth connection leads to earth connection fatigue fracture's problem because of unsettled and vibration.

The embodiment of the application is realized by the following technical scheme: the utility model provides a wind generating set blade lightning protection structure, is located wind generating set's paddle and cabin junction, the paddle is provided with the manhole with the cabin junction, be provided with the apron on the manhole, the apron is fixed in on the manhole through U type bolt.

Furthermore, a step is arranged on the inner wall of the manhole, an axial hole is formed in the step, and the U-shaped bolt penetrates through the axial hole to be connected with the cover plate.

Furthermore, the axial holes on the steps are distributed on the steps in a circumferential distribution mode.

Further, two ends of the U-shaped bolt penetrate through the cover plate and are fastened through the nut, and the nut is located on one side close to the cover plate.

Further, a base plate and a gasket are arranged between the cover plate and the nut, one side of the base plate is tightly attached to the cover plate, and the gasket is located between the base plate and the nut.

Further, the backing plate is a rectangular plate, two through holes are formed in the rectangular plate, and two ends of the U-shaped bolt penetrate through the two through holes respectively.

Furthermore, the middle part of the U-shaped bolt is fixed on the step through a buckle, and the buckle is fixed on the step through a screw.

Further, the apron middle part is provided with the earth connection passageway, wear the earth connection of intercommunication paddle in the earth connection passageway, be provided with a plurality of ply-yarn drill nails on the inner wall of apron and manhole, the earth connection passes through the ply-yarn drill nail is fixed in on the inner wall of apron and manhole.

Furthermore, a wheel hub is arranged at the joint of the manhole and the engine room, and the joint of the grounding wire and the wheel hub adopts an arc-shaped trend.

The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

1. the utility model has reasonable design and simple and effective structure, can prevent the cover plate from loosening only through the U-shaped structure of the U-shaped bolt, and avoids the problem that colloidal particles in the blade fall into the hub bearing.

2. The grounding wire is fixed in an arc-shaped trend mode, so that the problem of fatigue fracture of the grounding wire due to suspension vibration can be avoided, and the service life of the grounding wire is greatly prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic view of a U-shaped bolt structure;

icon: 1-U-shaped bolt; 2-a manhole; 3-a hub; 4-wire clip steel nail; 5-a ground wire; 6-cover plate; 7-step; 8-a base plate; 9-a gasket; 10-a nut; 11-buckling.

Detailed Description

In the description of the present application, it should be noted that, if the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. appears on the basis of the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, and thus, it should not be construed as limiting the present application.

In the description of the present application, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and the specific meanings of the above terms in the present application will be understood to those skilled in the art in a specific case.

As shown in fig. 1 to 3, a lightning protection structure for blades of a wind generating set is located at the joint of a blade of the wind generating set and an engine room, the joint of the blade and the engine room is provided with a manhole 2, the manhole 2 is provided with a cover plate 6, the cover plate 6 is fixed on the manhole 2 through a U-shaped bolt 1, the U-shaped bolt 1 is adopted for fixing, the U-shaped bolt 1 can be prevented from rotating per se due to the structure of the U-shaped bolt 1, even under the condition of long-time vibration, a connecting hole between the cover plate 6 and the U-shaped bolt 1 is not flexible, the fastening effect of the U-shaped bolt 1 can be ensured, and the looseness of the cover plate 6 is avoided, namely, colloidal particles in the blade are prevented from entering a hub 3 bearing on one side of the cover plate 6 through the gap between the manhole 2 and the cover plate 6.

Further, be provided with step 7 on the manhole 2 inner wall, be provided with the axial hole on the step 7, U type bolt 1 passes the axial hole and is connected with apron 6, sets up step 7 and can be convenient for fixed U type bolt 1.

Furthermore, the axial holes in the step 7 are distributed on the step 7 in a circumferential distribution manner, and the U-shaped bolts 1 are uniformly distributed on the step 7, so that the cover plate 6 is uniformly stressed when being fixed, and the stability of the cover plate 6 after being fixed is ensured.

Further, both ends of the U-bolt 1 penetrate the cover plate 6 and are fastened by a nut 10, and the nut 10 is located at a side close to the cover plate 6.

Further, still be provided with backing plate 8 and packing ring 9 between apron 6 and the nut 10, apron 6 is hugged closely to backing plate 8 one side, packing ring 9 is located between backing plate 8 and the nut 10, sets up backing plate 8 and can ensure the fixed stability of nut 10.

Further, the backing plate 8 is a rectangular plate, two through holes are formed in the rectangular plate, and two ends of the U-shaped bolt 1 penetrate through the two through holes respectively.

Further, the middle of the U-shaped bolt 1 is fixed on the step 7 through a buckle 11, the buckle 11 is fixed on the step 7 through a screw, the purpose of the buckle 11 is to fix the U-shaped bolt 1, the U-shaped bolt 1 needs to be fixed on the step 7 first and then the cover plate 6 is covered, and the buckle 11 is adopted to fix the U-shaped bolt 1 in order that the U-shaped bolt 1 cannot retreat due to stress when the cover plate 6 is covered. As shown in fig. 3B, the position B is a position where the clip 11 acts on the U-bolt 1, and the U-bolt 1 can be fixed.

Further, 6 middle parts of apron are provided with the 5 passageways of earth connection, wear the earth connection 5 of intercommunication paddle in the 5 passageways of earth connection, be provided with a plurality of ply-yarn drill nails 4 on the inner wall of apron 6 and manhole 2, earth connection 5 passes through ply-yarn drill nail 4 is fixed in on the inner wall of apron 6 and manhole 2. The ground wire 5 is fixed in a wiring mode, so that the ground wire 5 is not suspended in the manhole 2 any more, and the problem of fatigue fracture of the ground wire 5 due to suspension and vibration can be avoided.

Further, manhole 2 is provided with wheel hub 3 with the cabin junction, the arc trend is adopted with wheel hub 3 junction to earth connection 5. Because certain angle adjustment can exist between the blade and the engine room during working, the grounding wire 5 adopts a short-distance arc-shaped trend at the hub 3, a certain allowance can be provided for the grounding wire 5, when the blade and the engine room rotate relatively, the grounding wire 5 cannot be dragged, and meanwhile, the arc-shaped trend can enable the grounding wire 5 to pass through the hub 3 more smoothly and be connected downwards.

It should be noted that, in order to avoid the problem that the cover plate 6 cannot be closed stably due to the loosening of the bolt for fixing the cover plate 6 caused by vibration, the U-shaped bolt 1 adopted in the present invention fixes the cover plate 6, and the middle portion of the U-shaped bolt 1 is clamped on the step 7 for fixing the cover plate 6, so that even if the step 7 and the U-shaped bolt 1 are loosened, the fixing of the cover plate 6 is not affected, and the stability of the cover plate 6 is ensured.

In this embodiment, earth connection 5 is fixed in on apron 6 and the 2 inner walls of manhole through the mode of walking the line, has avoided earth connection 5 because of hanging the fatigue fracture that the vibration problem appears, has increased life by a wide margin, and at earth connection 5 and 3 bearing junction of wheel hub, earth connection 5 adopts the mode of short distance arc trend, can provide certain rotation allowance for earth connection 5, and it causes the dragging to earth connection 5 when having avoided paddle and cabin to take place relative rotation.

In this embodiment, an installation mode that wind generating set blade lightning protection structure provided is as follows: during installation, the U-shaped bolt 1 penetrates into the axial hole in the step 7, then the U-shaped bolt 1 is fixed by the buckle 11, the cover plate 6 is covered, the two ends of the U-shaped bolt 1 penetrate through the corresponding holes in the cover plate 6, the U-shaped bolt 1 is sleeved with the backing plate 8 and the gasket 9, and the cover plate 6 is fastened by the nut 10, so that the fixing of the cover plate 6 is completed.

Further, arranging the ground wire 5, fixing the ground wire 5 on the cover plate 6 and the manhole 2 through the wire clamp steel nail 4, and reserving a section of ground wire 5 at the joint of the ground wire 5 and the hub 3 to enable the ground wire 5 to be in an arc-shaped loose state.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. The utility model provides a wind generating set blade lightning protection structure, is located wind generating set's paddle and cabin junction, its characterized in that: the blade is provided with manhole (2) with the cabin junction, be provided with apron (6) on manhole (2), apron (6) are fixed in on manhole (2) through U type bolt (1).

2. The lightning protection structure for the blade of the wind generating set according to claim 1, wherein: be provided with step (7) on manhole (2) inner wall, be provided with the axial hole on step (7), U type bolt (1) passes the axial hole and is connected with apron (6).

3. The lightning protection structure for the blade of the wind generating set according to claim 2, wherein: the step (7) is annular, and the axial holes are distributed on the step (7) in a circumferential distribution mode.

4. The lightning protection structure for the blade of the wind generating set according to claim 3, wherein: two ends of the U-shaped bolt (1) penetrate through the cover plate (6) and are fastened through the nut (10), and the nut (10) is located on one side close to the cover plate (6).

5. The lightning protection structure for the blade of the wind generating set according to claim 4, wherein: still be provided with backing plate (8) and packing ring (9) between apron (6) and nut (10), apron (6) are hugged closely to backing plate (8) one side, packing ring (9) are located between backing plate (8) and nut (10).

6. The lightning protection structure for the blade of the wind generating set according to claim 5, wherein: the backing plate (8) is a rectangular plate, two through holes are formed in the rectangular plate, and two ends of the U-shaped bolt (1) penetrate through the two through holes respectively.

7. The lightning protection structure for the blade of the wind generating set according to claim 2, wherein: the middle of the U-shaped bolt (1) is fixed on the step (7) through a buckle (11), and the buckle (11) is fixed on the step (7) through a screw.

8. The lightning protection structure for the blade of the wind generating set according to claim 1, wherein: the utility model discloses a manhole cover, including apron (6), earth connection (5), be provided with in the middle part of apron (6) and earth connection (5) passageway, wear earth connection (5) of intercommunication paddle in earth connection (5) passageway, be provided with a plurality of ply-yarn drill steel nail (4) on the inner wall of apron (6) and manhole (2), earth connection (5) are passed through ply-yarn drill steel nail (4) are fixed in on the inner wall of apron (6) and manhole (2).

9. The lightning protection structure for the blade of the wind generating set according to claim 8, wherein: manhole (2) and cabin junction are provided with wheel hub (3), earth connection (5) and wheel hub (3) junction adopt the arc trend.

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