How wind turbine blades take out broken bolts

I did one such repair, the blade screw broke, smashed the power switch of the pitch control cabinet, only to find that the screw was broken.

The way to take out is to buy an extended drill bit, not too big on the line, if there is no such long drill bit to add a lengthening rod, this extension rod will be particular, it must be more than 14mm small no, raw materials to choose 16 round steel, now the round steel on the drill 8mm hole, and then the round steel with a flame heating way, and then the drill bit into the round steel is not less than 40mm (commonly known as hot charging), and then use a lathe drill bit as the benchmark to turn the round steel, in order to ensure that the extension rod and the drill bit concentricity. In this way, an extended wire extractor is made.

Then make a steel cone, just like the crashing hole of the drilling machine, all bring it to the hub and blade together, first find a good position, lay the crashing hole, and use the good extended drill bit to punch the hole in the bolt, and the rest of the things I estimate I don't say you know, be careful not to burn the drill bit here, pay attention to cooling, and don't rotate too fast. It is easy to damage the drill bit.

More feasible method: drill a blind hole of appropriate diameter, tap the reverse thread, and then screw the reverse bolt in, and continue to apply the reverse moment after the end.

Moment: Force f and its arm.

The product of l is called the moment of force against the axis of rotation. It is denoted by the letter m. (The distance between the force and the axis of rotation, that is, the vertical distance from the axis of rotation to the line of action of the force, is called the force arm.) The points on the object move in a circle.

But the center of the circular motion of all points is on the same straight line, and this straight line is called the axis of rotation.

You can make a hole in the bolt, and then use a milling cutter, mill thin, and then clip it out with clips, tweezers, etc.

We pulled out the blades of the machine, and the broken screws were cut by electric welding.

Shanghai Xupu standard parts are good.

Once the bolts on the wind turbine blades are broken, it will be more difficult to take them out, but you can try the following methods:1Use a drill bit:

A small hole in the center of the bolt can be drilled with an appropriately sized drill bit and then screwed out with a screwdriver. 2.Use a screw extractor:

This is a tool specifically designed to remove screws or bolts, which can be pulled out of the void by clamping the bolt head and rotating it. 3.Use the tool:

If there is a piece of work, the bolt can be screwed out using (e.g. a gas grinder). It is necessary to note that before the above operation, the surrounding dust and debris should be removed and the safety of the operation should be ensured. If you are unsure of your operating skills, it is advisable to seek professional help.