The Mechanism Of Operation Of A Hydraulic Bolt Tensioner

Hydraulic Bolt Tensioner

Tension is used to secure objects in place by means of a bolt. For the bolt to be securely fastened, the tension must not exceed eighty percent of its maximum tensile strength.

The process of hydraulic bolt tensioner entails manually stretching the stud bolt using mechanical tools. When a nut is fastened onto the bolt, the material is pushed out even farther. After the nut is tightened, the metal of the stud bolt relaxes back into its original form, allowing the stretching process to begin. Spring tension describes this action.

The bolt delivers the necessary force when it tightens against the nut upon returning to its original form. To ensure the application doesn’t fail while in use, the joint is securely in place. A hydraulic bolt tensioner is applied to ensure the stud bolt is properly preloaded when the nut is tightened.

If installed correctly and serviced often, industrial bolts have an infinite lifespan. You may achieve and keep the perfect bolt tension with the help of a bolt-tensioner system. Read below to know more on bolt tensioner price.

What is the Hydraulic Bolt Tensioner, and How Does It Work?

Consider the following details of the job at hand before settling on a hydraulic bolt tensioner. Consider the bolt load required, stud protrusion length, washer diameter, washer thickness, nut dimensions, bolt grade, and bolt diameter.

After that, check the technical specs of the hydraulic bolt tensioner to make sure it will deliver the hydraulic pressure needed to get the preload frequency you want.

The steps of a hydraulic tensioner:

  • Once the stud bolt’s free end is touching the flange, place the bolt tensioner over it.
  • Attach the puller of the tensioner to the cylinder piston by threading it down onto each load cell.
  • There is a connection between each tensioner and the hydraulic lines.
  • To preload the stud bolt as it begins to strain, provide the necessary hydraulic pressure.
  • A tommy bar will be used to crank the locking collar of the tensioner, which will force the nut on the joint.
  • Secure the nut in place by winding it along the face of the joint.
  • Turn the hydraulic bolt tensioner off.

The force applied to the stud bolt will be released as soon as the hydraulic bolt tensioner is disconnected. By compressing, it regains its original form, much like a spring. It forms the proper seal by clamping down on the joint.

Due to the limited capacity of a hydraulic bolt tensioner, it may be necessary to provide two tensioning forces in some situations. The hydraulic bolt tensioners will be transferred to the remaining bolts after concurrently tensioning a portion of them.

Hydrobolic bolt tensioning systems variants include:

In general, bolt-tensioning systems may be categorized into two main categories. Some systems can tighten every bolt simultaneously. Some people like to tense their muscles in halves, with the second half done right after.

While tightening every bolt simultaneously will make the process go by faster, it might also cause an unsecured bolt to fail.

Since the other half is still in place, a broken bolt won’t present an immediate issue when you perform half and half. This facilitates the detection of damaged bolts, their replacement, and the achievement of the desired tension.

The essential operation of the two hydraulic bolt-tensioner systems is identical. They slip over the stud, turn the nut loose, and tighten the bolt. After the desired amount of tension has been achieved, the nut is tightened to the specified torque specifications. That way, you can put the right amount of strain on each bolt and use your equipment to its full potential.