New types of washers and foundation bolts for seating marine diesel engines

Leszek Piaseczny

doi:10.19206/ce-117178

Abstract

New types of polymer–metal washers and foundation bolts fitted in polymer have been presented, applied for seating diesel engines in marine engine rooms. Test results have been given for the washers’ compression and shear strength in the polymer–metal separation surfaces

Highlights

According to the patent [1], the method of seating diesel engines on foundations (Fig. 1) consists in inserting metal separators in the clearances between engine feet and foundation shelves.Compared to the traditional casting of washers from polymer composites, the method of seating the diesel engine on the foundation according to the invention [2] eliminates the construction of forms and washer inlet systems, which reduces labour and polymer composite consumption, limits washer creep, decreasing the relaxation of foundation bolts’ tension, enabling the application of metal separators of equal thickness on the engine total length, at the same time preserving the chief merits of metal washers, eliminating their strenuous fitting to the engine foot surfaces and foundation shelves. 1
Na rysunku 2 przedstawiono złącze śrubowe pasowane w kompozycji polimerów, stosowane do posadowienia silników spalinowych i mechanizmów na fundamentach według patentu [3]
The surfaces of the steel elements of the joints were developed by file treatment (Ra = 1.93–2.74 mm), degreased with a solvent and covered with polymer composite mixed with a hardener, whereupon the joints were glued with a slight pressure

Summary

Introduction

According to the patent [1], the method of seating diesel engines on foundations (Fig. 1) consists in inserting metal separators in the clearances between engine feet and foundation shelves. Compared to the traditional casting of washers from polymer composites, the method of seating the diesel engine on the foundation according to the invention [2] eliminates the construction of forms and washer inlet systems, which reduces labour and polymer composite consumption, limits washer creep, decreasing the relaxation of foundation bolts’ tension, enabling the application of metal separators of equal thickness on the engine total length, at the same time preserving the chief merits of metal washers, eliminating their strenuous fitting to the engine foot surfaces and foundation shelves

Wprowadzenie

Research results

Wyniki badań

Conclusions

Wnioski