Bolts are mechanical parts, a type of fastener consisting of a head and a screw (column body with external threads), which cooperate with nuts and can be used to fasten two parts through holes. The connection form is a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is detachable. There are many names for bolts: screws, bolts, and tight fittings all have the same meaning. Bolt, be can be seen everywhere, and the indispensable part, therefore, is also referred to as " the rice of industry " when neutralizing in the middle of commercial production manufacture in daily life. As a bolt widely used in mechanical equipment, it is naturally also used in large industrial fans. The bolts will be loosened by vibration and impact during the operation of the fan. Therefore, it is essential to prevent loosening when using bolts.
How to loosen the bolts is not limited to industrial fans, but in all places where the bolts are used, especially in mechanical equipment, if the bolts suddenly fall off, it may cause a significant safety accident, so it is necessary to ensure the safety of the bolt connection. There are basic anti-loosening measures.
The anti-loosening measures of bolts can be divided into three types: frictional anti-loosening, machine-reduced anti-loosening, and permanent anti-loosening. Among them, mechanical anti-loosening and friction anti-loosening belong to detachable anti-loosening, and permanent anti-loosening belongs to non-detachable anti-loosening and non-detachable anti-loosening. Among the basic application fields of bolts, the most common ones are mat nuts against loosening and channel nuts in mechanical anti-loosening. The anti-loosening of the top nut is also called the anti-loosening of the double nut. It is a measure to prevent loosening by using the interaction force existing after the two top nuts are twisted violently. If one nut is loose, it is necessary to overcome the friction of the two nuts. This measure can often be seen in old equipment, and the anti-loosening of the channel nut is to pass through the small hole at the end of the bolt to connect with the nut groove after the nut is tightened (channel nut), to achieve The effect of mechanical anti-loosening.
With the development of the times, more and more permanent anti-loosening methods are used. Common water-permanent anti-loosening methods include spot welding, instant connection, and bonding. The full anti-loosening method of industrial large fan screws is the permanent anti-loosening riveting connection method. This method can only damage bolts or fasteners when disassembled, so it is used to effectively protect the connection between industrial fan blade handles and fan blades. The safety of the fan blades prevents the fan blades from falling.
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