Design and Optimization of Lip Seal for Air Braking System

Experimental research on the sealing ability of borehole packers

“…The authors of [10] have classified the factors that determine the tightness of hydraulic cylinders, among which the main ones are considered to be the following: the seal safety factor, the value of the material layer squeezed out into the clearance, and the maximum seal contact pressure on the conjugate surface. The authors of [11] have found that the tightness of the hydraulic cylinders of automatic loaders is mainly determined by the physical and mechanical properties of the material of the self-sealing rings, including the shear modulus.…”

“…The results of theoretical and experimental studies of self-sealing collar rings that are used in general engineering [6][7][8][9][10][11][12] are very valuable in terms of quality. They help distinguish and rank the factors that influence the sealing parameters and establish the general trends and the nature of the rings' sealing ability dependence on individual factors.…”

“…Moreover, in [6][7][8][9][10][11][12] there are no research findings on the simultaneous influence of the structural factors of a self-sealing ring, the intensity of the test pressure, and the time of its effect on the amount of contact pressure wherever there are conjugate surfaces.…”

“…Analysis of scientific papers [3][4][5][6][7][8][9][10][11][12] on the subject matter in question shows contemporary insufficiency of information to determine rational design parameters and operating modes of self-sealing rings of test wellhead packers in terms of a comprehensive action produced on them by force and geometrical parameters as well as material properties. This hinders their implementation in the industry and hence triggers the need for research in this area.…”

“…When planning the experiment based on a priori information [7,10,11], the assumed independent factors were as follows: the diametrical tension Δ, mm, the test pressure P, MPa, the radial clearance δ between the thrust bush and the casing, mm, and the shear modulus of the material σ sm , MPa. The contact pressure was assumed to be the objective function E, MPa.…”