Bolt tensioner is a bolt pre-tightening and disassemblytool. It is like a ring jack installed on bolts and nuts. With the help of
hydraulic power provided by tensioner pumps, the bolts are stretched in the
elastic deformation zone according to the allowable elasticity of the material
to achieve the purpose of tightening or removing the bolts. The biggest
advantage of the hydraulic bolt tensioner is that multiple bolts can be
fastened and disassembled at the same time. The distribution force is even. It
is a safe, efficient and fast tool, and it is the best way to fasten and
disassemble bolts of various specifications.
BoltTensionerThe thread friction between the nut and the washer consumesmore than 80% of the torque energy on the nut or bolt, leaving less than 20% of
the energy to produce effective tension on the bolt shank.
This change in friction loss, from one bolt to another, causesuneven tension on the bolts, so a bolt tensioning tools has appeared to solve
this problem.
The bolt tensioner is generally composed of a hydraulictensioner pump, a high-pressure hose, a pressure gauge and a stretching body.
The hydraulic tensioner pump is the power source, the pressure gauge reflects
the output pressure of the pump, and the high-pressure hose is connected to the
hydraulic tensioner pump and the stretching body.
Bolt TensionerThe hydraulic bolt tensioner is like a ring jack mounted onbolts and nuts. The jack pushes the bolt connection and pulls the end of the
bolt. The diameter of the bolt must be at least one longer to accommodate the
bolt tensioning tool.
Since the force generated by the jack directly acts on theend of the bolt, a tension equal to the load generated by the jack is generated
in the bolt shank.
In the case of tension applied by the jack, the nut can berotated with zero torque until it is tightened.
