Industrial Shock Absorbers

Shock Absorbers

Posted on June 17, 2015August 2, 2015 by admin

Construction and principles

• Shock absorber consists of 5 major parts; Head, piston rod, body, adjustment dial and lock nut.
• Head is the direct contact part which is impacted by moving object and operated as a stopper to the body when cycle is completed.
• Piston rod transfers impact energy to the piston through the full stroke.
• Outside the body is fully threaded for easy installation at any position and for more heat dissipation.
• Adjustment dial is for the optimum operation by turning and setting knob to the various impact conditions.
• Lock nut is used to install and fix the shock absorbers tightly coupled with body thread on the machine.

The Inside of shock absorber consists of piston, check valve, inner tube, multiple orifices, accumulator, return spring and oil. On impact, the piston rod is inserting into inner tube which causes pressure to seat check ball and close the check valve, and forces the oil in the chamber to flow through the orifice, generating damping force, to the opposite
piston and accumulator which is compressed to compensate the volume of the piston rod.

Energy absorption theory
After impact, coil spring forces check ball unseated and open the check valve to pass the oil into the oil chamber and recoil piston head and rod to its original position. When oil passes through the orifice, the impact energy is converted to the heat energy and dissipated to the atmosphere.

ORIFICE CHARACTERISTIC
Single Orifice

• Single orifice type is called dashpot which has only one orifice on the piston as a hole or annular shape.
• At the beginning the shock force is very high and decreased rapidly.

Multiple Orifice (Adjustable Type)
Through the stroke, the piston head closes one by one, which provides constant linear deceleration. Adjustable type shock absorber is for the optimum deceleration to turn and set properly adjustment dial to the impact conditions.

Multiple Orifice (Self Compensating Type)
Through the stroke, the piston head closes one by one, which provides constant linear deceleration. Self compensating type shock absorber is suitable for unvaried operating conditions and available in the range of effective weight for the best deceleration.

• A1 is a diagram of high speed and low propelling force
• B1 is a diagram of low speed and high propelling force

http://www.industrialabsorber.com/en/shock-absorber