Oil dashpot

When the main clutch teeth (E) are fully engaged, power is transmitted from the turbine to the generator. Engagement and disengagement of the main clutch is cushioned by the oil dashpot (H). 

When microelectromechanical systems move in air, the viscous loss (friction) can provide dampening for the device. A familiar example of dampening in macromechanical systems is the oil dashpot that is included in a mass-spring system, as shown in Figure 2.17 (left), which is described by the second-order differential equation... 

DASHPOT - A damping device, usually consisting of a cylinder and a piston in which relative motion of either displaces a fluid such as air or oil, resulting in friction. 

The simplest linear viscous model is Newton s model. This is shown by a piston-dashpot element [10]. The dashpot is an energy dissipation element, and it represents a viscous damping force. It relates the translational and rotational velocity of a fluid (oil) between two points, and an applied load, by using a damping constant. 

T] = viscosity of newtonian fluid (oil) in dashpot, Pa s Total strain e = strain in the spring + strain in the dashpot... 

The movement of the neutron absorber is suitably damped by a shock absorber at the end of travel to prevent damage to the control rod. Vane type rotary hydraulic dashpots with oil reservoir are commonly used as shock absorbers. Double vane can be used to balance forces on dashpot shaft arising from high oil pressure during damping action. Detailed theoretical analysis as well as experimental investigations are necessary to optimize the rod drop dynamics. 

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