Abstract

The evaluation of the radial contact stress in a gland packing and its distribution in the axial direction at both the stem and housing interfaces is of major importance when predicting leakage. The method that uses direct measurement of this stress through the use of strain gages installed at the outer surface of the housing is not straightforward. The complexity of the problem is caused by the complex axisymmetric problem with a load variation in the axial direction. The use of analytical and numerical FE modeling can be feasible. This paper examines the contact stress distribution in a gland packing. It shows how strains measurements fixed outside a gland housing coupled with FEM could be used to characterize the compression capacity of packings. The proposed method is used in a stuffing box packing rig under development.

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