The working principle of hydraulic nuts

As a new type of powerful fastening element, hydraulic nut can be used in various occasions that require strong fastening and strong anti-loosening fastening. It can directly replace traditional nuts, especially where the narrow space cannot meet the wrench space and operating space. The nut can better meet the tightening needs. In some occasions, using hydraulic nuts to directly replace traditional nuts can achieve the advantages of synchronized fastening of multiple sets of hydraulic nuts, achieve synchronized fastening to obtain the same pre-tightening force, make installation and assembly work more accurate, and improve equipment performance.

Ordinary thread locking is locked by rotating the wrench to generate torque. The main force is consumed to overcome the frictional resistance between threads, especially for large-diameter threaded connections, which are affected by manpower, tools and working space, and its pre-tightening force It can't meet the design and installation requirements at all, so the thread is easy to loosen in the vibration situation.

The hydraulic nut has completely changed the traditional screw fastening method, changing the traditional torque locking to axial tension locking. Even if the hydraulic nut is used with the power of the ultra-high pressure oil pump, the tightening bolt is axially elongated, close to the yield point of the material, and the thread is locked by the elasticity of the material itself. (Guide: Analyze the key features of the two types of stainless steel)

In some occasions, hydraulic nuts cannot be used to directly replace existing nuts but to achieve strong fastening, hydraulic bolt tensioners can be used to achieve technical requirements with the same functions and characteristics as hydraulic nuts.

The working principle of hydraulic bolt tensioner is the same as that of hydraulic nut. The bolt is stretched and elongated by hydraulic pressure, and then the nut is tightened and locked to achieve strong tightening. The use of hydraulic nut or hydraulic bolt tensioner can be accurate Set the pre-tightening force with an accuracy of 3% The hydraulic bolt tensioner with combined design can realize a set of tensioners suitable for the tensioning use of bolts of multiple specifications by changing different stretching heads, and has perfect versatility and replacement.

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