Fault analysis of hydraulic stretcher 1. Oil leakage of hydraulic tensioner Main causes: wear or aging of the upper and lower sealing rings; The bleed screw is not tightened or damaged; During operation, the lift of the hydraulic stretcher exceeds the maximum lifting height. Measures: replace the sealing ring; Tighten or replace the bleed screw; [...]
It's the same equipment for removing bolts. What's the difference between bolt stretcher and hydraulic wrench? Bolt stretcher and hydraulic wrench are important tools for fastening bolts. They are frequently used in construction, maintenance and repair of shipbuilding, petrochemical, construction, power, mining, metallurgy and other industries. They are very important equipment for the installation and [...]
About hydraulic bolt stretcher, also called hydraulic nut, is an advanced bolt assembly method, especially suitable for fastening of narrow space and heavy-duty vibration machinery. Its main components include sliding piston, oil cylinder, support ring, sealing ring, air release screw and quick joint, etc. The working principle of the hydraulic bolt stretcher is that the [...]
To choose bolt stretcher depends on the stretching mode first, the required pretightening force Kn, and then the torque mode, and the required tightening torque Nm. Bolt stretching is to use hydraulic cylinder to exert external force on the bolt end, stretch the bolt to the required length, and then tighten the nut, so that [...]