Excerpt from The Balancing of Engines
During the last ten years the subject of Engine Balancing has gradually forced itself upon the attention of Marine Engineers, chiefly because the unbalanced periodic forces of the engine and the natural periods of vibration of the hull have mutually approached the sensitive region of synchronism. Electrical Engineers have had vibration troubles at Central Stations and on Electric Railways, and many cases of undue wear and tear and hot bearings in Mills and Factories undoubtedly arise from unbalanced machinery, though the actual vibration produced may not be great.
In general, the running of an unbalanced engine or machine provokes its supports to elastic oscillations, and adds a grinding pressure on the bearings, and the obvious way to prevent these undesirable effects from happening is to remove the cause of them, that is to say, balance the moving parts from which the unbalanced forces arise.
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HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780331286397
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