Analytical Study of Operational Properties of a Plate Shock Absorber of a Sucker-Rod String

Abstract EN

Sucker-rod pump plant operation is accompanied by inertial and shock loads, affecting the fatigue strength of sucker rods and causing possible accidents.

This work proposes the original design of a shock absorber of a sucker-rod string.

The peculiarity of the proposed design is the usage of thin plate packages as a bearing elastic element of the shock absorber.

This approach to the elastic element’ design provides the shock absorber to be easy to manufacture and operate.

Sucker-rod string protection from extra load will increase the sucker-rod pump plant efficiency in general.

This study aims at developing shock absorber’s design and studying its most important performance options—strength and rigidity.

A mechanical and mathematical model of a shock absorber’s elastic element was developed in order to specify its deformation.

A package of thin plates was modelled as an equivalent solid plate with a cylindrical rigidity providing equal properties of the solid model and the plate package.

This model makes possible to describe analytically the stress-strain state of the shock absorber bearing elements.

The work presents the final expressions of the shock absorber’s strength and rigidity assessing in a convenient form for engineering practice.

The numerical approbation of the obtained analytical results was carried out as the case of a plate elastic element.

The authors give recommendation on the bearing unit’s design of the shock absorber.