Soviet S-834 Impact-Vibration Hammer: Calculations, Part II

The introduction to this series is here.  The first installment of the calculations is here. Calculations of Main Details (Strength Calculations) Strength calculations assume that the inertial forces during impact are 150 times those of the weight. Rotor Shaft We checked the rotor shaft strength in the optimal mode, i.e., when the impacting force direction … Continue reading Soviet S-834 Impact-Vibration Hammer: Calculations, Part II

Soviet S-834 Impact-Vibration Hammer: Calculations, Part I

The introduction to this series is here. Moscow, 1963 Head of the Vibrating Machine Department L. Petrunkin Head of Vibration Machine Construction: I. Friedman Compiler: V. Morgailo and Krakinovskii Specification The impact-vibration hammer is intended for driving heavy sheet piles up to 30 cm in diameter as well as concrete piles 25 cm square up … Continue reading Soviet S-834 Impact-Vibration Hammer: Calculations, Part I

Soviet S-834 Impact-Vibration Hammer: Overview

With this we begin a series of posts on the S-834 impact-vibration hammer, which the VNIIstroidormash institute in Moscow designed and produced in the early 1960's.  With the revived interest in Soviet and Russian technology, it's a detailed look at how Soviet equipment designers came up with an equipment configuration.  But it's also a close-up … Continue reading Soviet S-834 Impact-Vibration Hammer: Overview

The Valve Loss Study

All fluid flow in Vulcan hammers is regulated and directed by a valve.  For most Vulcan hammers (the California series being a notable exception, the #5 is another) the valve is a Corliss type valve modified from those used in steam engines.  Simple and reliable, it, like any other valve, is subject to losses as … Continue reading The Valve Loss Study

Back in the Saddle at the Deep Foundations Institute

Vulcan Iron Works was involved in its industry in a number of ways other than simply selling and renting its product.  One of these was its years in the Deep Foundations Institute.  Although Vulcan was not a charter member of the organisation, it joined very shortly after its beginning and was active during the 1980's … Continue reading Back in the Saddle at the Deep Foundations Institute

Engineering at Vulcan

Vulcan would have never endured as long as it did without a properly engineered product, especially in the punishing environment of impact pile driving equipment. There is a great deal of technical information on this site; here we give a glimpse as to how much of it came into being. There are special sections on … Continue reading Engineering at Vulcan

Vulcan Iron Works: The Company

Vulcan had a long and interesting history. Some of that is documented below: Vulcan: The First 100 Years A history in words and photos of Vulcan's first century of existence Vulcan Iron Works Centennial Celebration Vulcan: The Offshore Experience A comprehensive view of Vulcan and its offshore hammers Product Bulletins: a list of the literature … Continue reading Vulcan Iron Works: The Company

Vulcan Patents

Vulcan was an innovator in pile driving equipment for more than a century. This history can be documented in part by the patents that were issued to Vulcan's people, in addition to those which it acquired externally. We also include patents that were related to Vulcan either because they were issued to a Warrington or … Continue reading Vulcan Patents

Conmaco

Vulcan’s success in its product lines inspired imitators.  One of the most significant of those came from its own distributor network—Conmaco.  The relationship between the two companies was as complicated of a business as one could want, both together and apart. Conmaco was started in 1910 as Contractors Machinery Company.  Three years later Scott Myers, … Continue reading Conmaco

Vulcan vs. the Machinists’ Union: The Turkey Grievance

Although Vulcan's relationship with the Machinists' trade union at its Chattanooga facility was generally reasonable as such things go, every now and then conflict would arise outside of the triennial (usually) contract negotiations. Probably the most significant of these conflicts--and certainly the best publicised--was the "Turkey Grievance" in 1981. It's a good way to illustrate … Continue reading Vulcan vs. the Machinists’ Union: The Turkey Grievance