CN220539758U

CN220539758U - Blade locking device of wind generating set

Info

Publication number: CN220539758U
Application number: CN202322306081.5U
Authority: CN
Inventors: 严世宽; 侯泽远; 宋恭杰; 陆庆丰
Original assignee: Yunda Energy Technology Group Co ltd
Current assignee: Yunda Energy Technology Group Co ltd
Priority date: 2023-08-28
Filing date: 2023-08-28
Publication date: 2024-02-27
Anticipated expiration: 2033-08-28

Abstract

The utility model provides a wind generating set blade locking device which is positioned in a hub process hole and comprises a main body frame, ejector rods and blade bolts, wherein two sides of the main body frame in the length direction are provided with outer convex steps, the two ejector rods are respectively inserted into the outer convex steps to be movably connected, one ends of the two ejector rods, which are far away from the outer convex steps, respectively prop against the inner wall of the hub process hole, the main body frame is also provided with through holes perpendicular to the outer convex steps, one ends of the blade bolts are inserted into the through holes to be fixed, and the other ends of the blade bolts penetrate out of a pitch bearing to be connected with blades. The utility model improves the universality of the blade locking device, reduces the occupied space, improves the assembly efficiency and reduces the assembly cost.

Description

Blade locking device of wind generating set

Technical Field

The utility model relates to the technical field of wind power generation, in particular to a blade locking device of a wind generating set.

Background

In the working process of the wind generating set, if an abnormal wind speed or a fault overhaul is encountered, the blades are required to be locked. The traditional blade locking device is connected through a bolt, and the positioning piece is fixed on a gear of the deflection bearing, so that the structure is poor in universality, large in occupied space and capable of causing abrasion to the tooth surface of the deflection bearing, and normal operation of a fan is affected.

The following disadvantages exist in locking the fan blade by adopting the traditional locking device:

1. the universality is poor, and the traditional locking device can only be suitable for one fan blade.

2. The structure is big, and the assembly is complicated, and occupation space is too much.

3. The stator can cause wearing and tearing to the gear tooth face of the variable pitch bearing, reduces its life, influences the normal work of fan.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides the blade locking device for the wind generating set, which has the advantages of improving the universality of the blade locking device, reducing the occupied space, improving the assembly efficiency and reducing the assembly cost.

In order to achieve the above purpose, the utility model provides a blade locking device of a wind generating set, which is positioned in a hub process hole and comprises a main body frame, ejector rods and blade bolts, wherein two sides of the main body frame along the length direction are provided with outer convex steps, the two ejector rods are respectively inserted into the outer convex steps to be movably connected, one ends of the two ejector rods, which are far away from the outer convex steps, respectively prop against the inner wall of the hub process hole, the main body frame is also provided with a through hole vertical to the outer convex steps, one ends of the blade bolts are inserted into the through hole to be fixed, and the other ends of the blade bolts penetrate out of a pitch bearing to be connected with blades.

Preferably, the main body frame comprises a side vertical plate and a bottom plate, the side vertical plate is provided with an opening, the bottom plate is clamped in the opening, the through hole is formed in the bottom plate, and the blade bolt is inserted into the through hole to be fixed.

Preferably, the side vertical plates comprise two large side vertical plates and two small side vertical plates, an opening is formed between the two large side vertical plates, the bottom plate is clamped in the opening, and the two small side vertical plates are connected with the two large side vertical plates and are perpendicular to the bottom plate.

Preferably, a space is arranged between the small side vertical plate and the bottom plate.

Preferably, the large side vertical plate is of a T shape.

Preferably, the locking device further comprises two pressure heads, wherein the two pressure heads are respectively in threaded connection with the corresponding ejector rods and are abutted with the inner wall of the hub process hole.

The utility model has the beneficial effects that:

(1) By arranging the adjustable ejector rods, the ejector rods can stretch, the length between the two ejector rods can be changed, the universality of the blade locking device is improved, the blade locking device can meet the locking of a plurality of types of blades, and the equipment cost is reduced;

(2) The main body frame is formed by welding the large side vertical plates, the small side vertical plates and the bottom plate, so that the structural volume is reduced, the occupied space is reduced, the assembly efficiency is improved, and the assembly cost is reduced.

(3) One end of the blade bolt is connected with the main body frame, and the other end of the blade bolt penetrates out of the variable pitch bearing and then is directly connected with the blade, so that abrasion of the tooth surface of the gear of the variable pitch bearing is eliminated, and the service life is prolonged.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of the structure of the present utility model when installed.

FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1.

Fig. 3 is a schematic diagram of the structure at a in fig. 2.

FIG. 4 is a schematic view of the sectional structure B-B in FIG. 3.

Fig. 5 is a schematic view of the structure of the main body frame.

Fig. 6 is a cross-sectional view of the body frame.

FIG. 7 is a schematic view of the cross-sectional structure of C-C in FIG. 6.

In the figure: 1-main body frame, 2-ejector rod, 3-pressure head, 4-blade bolt, 11-bottom plate, 12-big side vertical plate, 13-small side vertical plate, 131-outer convex step, 10-hub, 101-hub process hole, 111-through hole and 20-pitch bearing.

Detailed Description

The present utility model will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the detailed description and specific examples, while indicating the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

As shown in fig. 1 to 7, the embodiment provides a blade locking device for a wind generating set, which comprises a main body frame 1, ejector rods 2, a pressure head 3 and a blade bolt 4, wherein the main body frame 1 is a welding piece, the material is 304, the device consists of a bottom plate 11, two large side vertical plates 12 and two small side vertical plates 13, the two large side vertical plates 12 are symmetrically arranged, the two large side vertical plates 12 are all in a 'T' -shape, an opening is arranged between the longer ends of the lengths of the two large side vertical plates 12, the bottom plate 11 is clamped in the opening and is vertically arranged with the large side vertical plates 12, the two small side vertical plates 13 are symmetrically arranged, are respectively connected with the shorter ends of the two large side vertical plates 12 and are vertical to the bottom plate 11, the two small side vertical plates 13 are respectively provided with an outer convex step 131, one end of each ejector rod 2 is respectively inserted into the outer convex step 131 and is in threaded connection with the outer convex step 131, the other end of each ejector rod 2 is also in threaded connection with the pressure head 3, the material of the pressure head 3 is polyurethane, the whole blade locking device is positioned in a hub process hole 101, and the two small side vertical plates 3 are respectively abutted against the inner walls of the hub 101.

A space is arranged between the small side vertical plate 13 and the bottom plate 11, four through holes 111 are formed in the bottom plate 11, one end of the blade bolt 4 is inserted into the through holes 111 and fixed through nuts, and the other end of the blade bolt penetrates out of the variable-pitch bearing 20 and then is connected with the blade.

When a blade is required to be locked, a bottom plate 11 of a main body frame 1 of the blade locking device is connected and fixed with a blade bolt 4 corresponding to a hub process hole 101 through a nut, and then the length of a required ejector rod 2 is calculated according to the size of the hub process hole 101. And the ejector rod 2 is rotated, the ejector rod 2 at the outer side of the main body frame 1 is adjusted to the required length, the ejector rod 2 is clamped in the corresponding hub process hole 101, and locking of the blade is completed.

The length of the ejector rod 2 at the outer side of the main body frame 1 of the blade locking device can be adjusted by rotating the ejector rod 2, and hub process holes 101 with different sizes are matched, so that the blade locking device has excellent universality; the top of the ejector rod 2 is connected with a polyurethane pressure head 3, so that paint on the surface of the hub process hole 101 can be prevented from being worn; the blade locking device is small in structure and convenient to assemble, and the efficiency of blade locking is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a wind generating set blade locking device which characterized in that: the blade bolt is characterized by being positioned in a hub process hole and comprising a main body frame, ejector rods and blade bolts, wherein the two sides of the main body frame along the length direction are provided with outer convex steps, the two ejector rods are respectively inserted into the outer convex steps to be movably connected, one ends of the two ejector rods, which are far away from the outer convex steps, respectively prop against the inner wall of the hub process hole, the main body frame is further provided with a through hole perpendicular to the outer convex steps, one ends of the blade bolts are inserted into the through hole to be fixed, and the other ends of the blade bolts penetrate out of the variable-pitch bearings to be connected with blades.

2. The wind generating set blade lock of claim 1, wherein: the main body frame comprises a side vertical plate and a bottom plate, wherein the side vertical plate is provided with an opening, the bottom plate is clamped in the opening, the through hole is formed in the bottom plate, and the blade bolt is inserted into the through hole to be fixed.

3. The wind generating set blade lock of claim 2, wherein: the side vertical plates comprise two large side vertical plates and two small side vertical plates, an opening is formed between the two large side vertical plates, the bottom plate is clamped in the opening, and the two small side vertical plates are connected with the two large side vertical plates and are perpendicular to the bottom plate.

4. A wind generating set blade lock as claimed in claim 3, wherein: and a space is arranged between the small side vertical plate and the bottom plate.

5. A wind generating set blade lock as claimed in claim 3, wherein: the large side vertical plate is T-shaped.

6. Wind park blade locking device according to any of the claims 1-5, wherein: the locking device further comprises two pressure heads, wherein the two pressure heads are respectively in threaded connection with the corresponding ejector rods and are abutted against the inner wall of the hub process hole.