Tool for preventing internal bolt of fan blade from breaking and falling

Abstract

According to the tool for preventing the bolts in the fan blade from breaking and falling, an anti-falling assembly is arranged on the outer wall of a main shaft at the root of the fan blade and comprises a mounting plate, the bottom of the mounting plate penetrates through the circumferential surface of the main shaft at the root of the fan blade, a mounting groove is formed in the top of the mounting plate, and the mounting plate is arranged in the mounting groove. A bolt is in threaded connection with the circumferential surface of the mounting groove, a first nut is in threaded connection with the circumferential surface of the bolt, and a lifting lug is arranged at the top of the first nut. The broken bolt can only shake in a nearby area after falling off, random damage in the hub is avoided, and the situation that normal operation and safety of equipment are affected due to potential safety hazards caused by nut loosening and bolt falling after breakage can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fan blade technical field, especially, relate to a tool that prevents fan blade internal bolt fracture and falls. BACKGROUND

[0002] From the blade bolt fracture statistics, the fracture bolt concentrates in the rear edge of the blade in a certain area, commonly known as the high stress area, the number is about 10-15 roots of screw, the bolt is adjusted into the hub after breaking, with the rotation of the hub, it is very easy to smash the oil pipe, electrical device, control circuit in the hub, easy to cause fan failure, variable pitch failure, and even may cause fan runaway, fire accident, etc.

[0003] According to the public one kind fan blade root bolt drilling platform (disclosed number: CN 208629344 U), the nut is connected with the original bolt of blade by welding, the mounting hole on the support arm is connected with the support rod, and is fixed by adjusting the nut clamping support arm through two support rods, the long slot is opened on the support arm, the long slot is fixed with the tool platform by lock nut, the tool platform four corners are respectively provided with one tool platform positioning rod, and the magnetic drill is installed on the tool platform.

[0004] In the above application, through the mutual cooperation between the bolt, the installation magnetic drill and other components, it is difficult to solve the problem that the safety hidden danger caused by the nut loosening and the bolt falling after breaking cannot be effectively prevented, leading to random damage in the hub, affecting the normal operation and safety of the equipment, which needs to be improved. UTILITY MODEL CONTENTS

[0005] The utility model discloses a tool that prevents fan blade internal bolt fracture and falls, through the mutual cooperation between the bolt, nut one, steel wire rope and other components in the anti-falling assembly, after the bolt in the high stress area is connected in series, the broken bolt can only swing in the nearby area when falling down, random damage in the hub is avoided, the safety hidden danger caused by the nut loosening and the bolt falling after breaking can be effectively prevented, thereby affecting the normal operation and safety of the equipment, and the existing problems are solved.

[0006] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0007] The utility model discloses a tool for preventing bolt inside fan blade from breaking and falling, the outer wall of fan blade root main shaft is provided with anti -drop subassembly, the anti -drop subassembly includes the mounting panel, the bottom of mounting panel is penetrated on the circumference of fan blade root main shaft, the top of mounting panel is provided with the mounting slot, the circumference of mounting slot is connected with bolt in screw thread, the circumference of bolt is connected with nut no.

[0008] Further, the snap spring is provided with two, and is mutually symmetrical along the horizontal straight central axis of nut no. 1, and the two snap springs are beneficial to limiting the nut no. 1.

[0009] Further, the one end of the steel wire rope away from the lifting lug is penetrated on the inner wall of the snap spring, and the steel wire rope is used for threading the lifting ring nut.

[0010] Further, the bolt is provided with a plurality of, and is in circumferential array on the top of mounting panel, and the plurality of bolts can be connected in series in the high stress area, and the broken bolt can only swing in the nearby area after falling down, thereby avoiding random damage in the hub.

[0011] Further, the mounting slot is provided with a plurality of, and is in circumferential array on the top of mounting panel, and the design of the mounting slot can install a plurality of bolts simultaneously.

[0012] Further, the steel wire rope is provided with a plurality of, and is in circumferential array on the outer wall of bolt, and the plurality of steel wire ropes can thread the plurality of lifting ring nuts simultaneously due to the plurality of bolts.

[0013] Further, the lifting lug is provided with two, and is mutually symmetrical along the vertical central axis of bolt, and the design of the lifting lug can make the steel wire rope pass through, and is beneficial to stably fixing.

[0014] The utility model has the advantages of the following:

[0015] The utility model discloses the mutual cooperation between bolt, nut no. 1, steel wire rope and other components in the anti -drop subassembly, realizes after connecting in series in the high stress area, and the broken bolt can only swing in the nearby area after falling down, thereby avoiding random damage in the hub, can effectively prevent the security hidden danger caused by nut loosening and bolt breaking and falling, thereby influencing the normal operation and safety of equipment. ACCURACY OF DRAWINGS

[0016] Figure 1 It is three-dimensional appearance structure schematic diagram of the utility model;

[0017] Figure 2The utility model discloses a three-dimensional enlarged structure schematic diagram of the installation groove;

[0018] Figure 3 The utility model discloses a three-dimensional enlarged structure schematic diagram of the bolt;

[0019] Figure 4 The utility model discloses Figure 3 Three-dimensional enlarged structure schematic diagram of A.

[0020] In the drawing, the component list represented by each sign is as follows: 1, fan blade root main shaft;2, anti-falling assembly;21, installation groove;22, bolt;23, nut one;24, nut two;25, steel wire rope;26, clamping spring;27, lifting lug;28, mounting plate. Specific implementation

[0021] A tool for preventing the breakage and falling of the bolt in the fan blade, the outer wall of the fan blade root main shaft 1 is provided with an anti-falling assembly 2, the anti-falling assembly 2 includes a mounting plate 28, the bottom of the mounting plate 28 is penetrated on the circumferential surface of the fan blade root main shaft 1, the top of the mounting plate 28 is provided with an installation groove 21, the circumferential surface of the installation groove 21 is threadedly connected with a bolt 22, the circumferential surface of the bolt 22 is threadedly connected with a nut one 23, the top of the nut one 23 is provided with a lifting lug 27, the circumferential surface of the bolt 22 is provided with a clamping spring 26, the inner wall of the lifting lug 27 is penetrated with a steel wire rope 25, and the circumferential surface of the bolt 22 is threadedly connected with a nut two 24.

[0022] The clamping spring 26 is provided with two, and is symmetrical along the transverse central axis of the nut one 23, and the two clamping springs 26 are beneficial to the limitation of the nut one 23.

[0023] One end of the steel wire rope 25 away from the lifting lug 27 is penetrated in the inner wall of the clamping spring 26, and the steel wire rope 25 is used for threading each lifting ring nut.

[0024] The bolt 22 is provided with a plurality of, and is arranged in the top of the mounting plate 28 along the circumference, a plurality of bolts 22 can be connected in series in the high stress area, and the broken bolt 22 can only shake in the nearby area after falling down, thereby avoiding random damage in the hub.

[0025] The installation groove 21 is provided with a plurality of, and is arranged in the top of the mounting plate 28 along the circumference, and the design of the installation groove 21 can simultaneously install a plurality of bolts 22.

[0026] The steel wire rope 25 is provided with a plurality of, and is arranged on the outer wall of the bolt 22 along the circumference, because a plurality of bolts 22 are arranged, a plurality of steel wire ropes 25 can be arranged to simultaneously thread a plurality of lifting ring nuts.

[0027] The two lifting lugs 27 are symmetrically arranged along the vertical central axis of the bolt 22, and the lifting lug 27 is designed to allow the steel wire rope 25 to pass through and be stably fixed.

[0028] One specific application of the embodiment is:

[0029] The lifting lug 27 formed in the upper portion of the nut 23 is used to pass through the steel wire rope 25, and the two clamping springs 26 are used to clamp the upper and lower bolts 22 of the lifting ring nut. One end of the steel wire rope 25 is threaded through the inner wall of the lifting lug 27, then through the inner wall of the first clamping spring 26, then through the inner wall of the second clamping spring 26, and then the steel wire rope 25 is pulled through the second lifting lug 27 to clamp the nut 23, preventing the nut 23 from loosening. After the high-stress area bolt 22 is connected in series, the broken bolt 22 can only sway in the nearby area after falling down, avoiding random damage in the hub. The design of the lifting lug 27 and the clamping spring 26 can effectively prevent the safety hazards caused by the loosening of the nut and the falling of the broken bolt 22. If there is no fixing measure, the falling parts may cause serious failure or damage to other parts in the high-speed running fan, thereby affecting the normal operation and safety of the equipment.

Claims

1. A tooling for preventing internal bolts of a wind turbine blade from breaking and falling off, characterized in that: An anti-fall component (2) is provided on the outer wall of the main shaft (1) at the root of the wind turbine blades; the anti-fall component (2) includes a mounting plate (28), the bottom of the mounting plate (28) passes through the circumferential surface of the main shaft (1) at the root of the wind turbine blades, the top of the mounting plate (28) is provided with a mounting groove (21), a bolt (22) is threadedly connected to the circumferential surface of the mounting groove (21), a nut (23) is threadedly connected to the circumferential surface of the bolt (22), a lifting lug (27) is provided on the top of the nut (23), a retaining ring (26) is provided on the circumferential surface of the bolt (22), a steel wire rope (25) passes through the inner wall of the lifting lug (27), and a nut (24) is threadedly connected to the circumferential surface of the bolt (22).

2. The tooling for preventing internal bolts of wind turbine blades from breaking and falling off according to claim 1, characterized in that, Two snap rings (26) are provided, and they are symmetrical to each other along the horizontal central axis of nut one (23).

3. The tooling for preventing the internal bolts of a wind turbine blade from breaking and falling off according to claim 2, characterized in that, The end of the wire rope (25) away from the lug (27) passes through the inner wall of the snap ring (26).

4. The tooling for preventing the internal bolts of a wind turbine blade from breaking and falling off according to claim 3, characterized in that, The bolts (22) are provided in a plurality of numbers and are arranged in a circumferential array on the top of the mounting plate (28).

5. The tooling for preventing the internal bolts of a wind turbine blade from breaking and falling off according to claim 4, characterized in that, The mounting slots (21) are provided in a plurality of positions and are arranged in a circumferential array on the top of the mounting plate (28).

6. The tooling for preventing the internal bolts of a wind turbine blade from breaking and falling off according to claim 5, characterized in that, Several steel wire ropes (25) are provided and are arranged in a circumferential array on the outer wall of the bolt (22).

7. The tooling for preventing the internal bolts of a wind turbine blade from breaking and falling off according to claim 6, characterized in that, Two lugs (27) are provided and are symmetrical to each other along the vertical central axis of the bolt (22).

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