Why use belleville washers

What is differential thermal expansion? What is live loading? What is presetting? How do you determine working temperatures? What does it mean to calculate load and stress?

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The characteristics of the Belleville washer make it useful in landmines. Once the spring has been stepped on by a person or a vehicle, the pressure exerted causes the trigger to flip the adjacent firing pin that is connected to a detonator. This washer is used as a locking device but only in applications that require low dynamic loads such as down-tube shifters in bicycles.

It is also used as an indicator of swelling or shrinkage of wooden propellers in aircrafts. Automobiles also use this kind of disc spring to reduce vibration and noise. These washers have also been used in the construction of buildings wherein stacks of disc springs are used under buildings as vibration dampers for earthquakes. DIN Belleville springs are conical disc springs with elastic properties. Julien Belleville filed a patent for a cupped, spring washer during the s in France. However, canonical-shaped washers had been around for several decades prior to his patent.

Regardless of its origins, Belleville washers have since become a popular choice for high-stress applications requiring the use of a washer. The purpose of a Belleville washer is to absorb loads by acting as a spring. When a load is applied a Belleville washer, the washer compresses. At the same time, the Belleville washer exerts an equal amount of force against the object. Depending on the application, multiple Belleville washers can be used to create greater resistance against heavy loads.

Rather than using a single Belleville washer, you can use two or three Belleville washers. The stack of Belleville washers creates multiple springs, each of which acts against the object.