Title: Controlling Automobile Shredder Vibration Through Pneumatic Isolation

Author(s): Donald E. Baxa and Robert Ebisch

Publication: Symposium Paper

Volume: 78

Issue:

Appears on pages(s): 33-46

Keywords: concrete bases; hammer milling; niachine bases; noise reduction; shock mechanics; shredders; vibration isolators.

DOI: 10.14359/16903

Date: 1/1/1982

Abstract:
This paper is a case study of pneuniatic isolation systeliis in large automobile recycling machines. Machines of increasing size and power, plus a public that is increasingly insistent on its right to an environment free of noise and vibration, equal potential problenis for recycling plants. In response to this situation, a hammermill/shredder operation making successful use of pneunlatic isolation has been designed and constructed. The first, and still the largest, operation of its kind, the operation has demonstrated a valuable method of containing machine vibrations that might otherwise ignite hostility in the surrounding community and quite possibly bring on expensive legal action. The particular system described was installed in a 4,000-horsepower hammermill at an Indiana recycling firm. Besides effecting a more than 90 percent reduction in ground vibration, the system allows for easier and more efficient machine leveling and includes systems to warn of and localize pressure loss, to minimize routine mechanical shock, and to contain extraordinary shocks resulting from exploding gas tanks and loss of hammers within the machine. The system has now been in use for two years with no reported problems.