How do Belleville disc springs work?
Simply put, Belleville washers and Disc Springs are engineered to support high loads, relative to deflection compared to ordinary lock washers or helical springs. They reduce loosening in bolted joints resulting from vibration, relaxation, and differential thermal expansion and contraction.
What is the purpose of a Belleville spring?
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.
What type of spring is a Belleville?
Belleville spring, disc spring, and conical compression washer are all names for the same type of spring. A Belleville spring is a conical shaped disc that will deflect (flatten) at a given rate. This spring rate is usually very high, allowing the spring to produce very large loads in a very small space.
Do Belleville washers wear out?
Yes, Belleville conical washers can be reused, repeatedly, as long as they are not damaged. Overloading and over-torquing these washers can wear them out over time. As long as they are used properly and checked before reuse, these fasteners can be used again and again to complete projects.
Where can I use Belleville washing machine?
Belleville washers are typically used in conditions of high current loading or cycling. They are used to absorb vibration and can maintain preload in bolted joints, indicating correct preload based on the gap between adjacent washers. They can also help with “bolt creep” or stress relaxation between a bolt and washer.
Should Belleville washers be flattened?
In a Belleville washer application, the manufacturer may say to flatten the washer and then back off slightly. Make sure you don’t back off too far, because when you flatten the washer a second time, it will have less clamping force than it was designed to have.
Why is it called a Belleville washer?
The “Belleville” name comes from the inventor Julien Belleville who in Dunkerque, France, in 1867 patented a spring design which already contained the principle of the disc spring. The real inventor of Belleville washers is unknown. Through the years, many profiles for disc springs have been developed.
What material are Belleville washers made of?
DIN Belleville Disc Washers are made with 51CrV4 spring steel (AISI 6150) and finished with a phosphate and oil surface for general protection from corrosion.
Where are Belleville washers used?
What are Belleville washers used for?
Their conical configuration enables them to support high loads with relatively small deflections and solid heights compared to helical springs. Belleville Washers are often used to solve vibration, thermal expansion, relaxation and bolt creep problems.
What is the difference between a flat washer and a spring washer?
Plain and spring washers are both used to distribute the load of a fastener. The difference lies in their shape. Plain washers are flat, whereas spring washers are curved. Spring washers are unique because they provide an axial load that counters vibrations and, thus, prevents fasteners from loosening.
What is Belleville washer used for?
Belleville Washers are often used to solve vibration, thermal expansion, relaxation and bolt creep problems.