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.
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Belleville springs can be stacked in a variety of ways.Belleville springs can be stacked in a variety of ways.A single Belleville spring has a specific load and deflection. Belleville springs in stacked arrangements provide increased load and/or deflection. Two springs stacked in parallel doubles the load of a single spring with no increase in deflection. Two springs stacked in series doubles the deflection of a spring with no increase in load. The parallel-series combination as shown below results in the load of two springs and the deflection of two springs.Belleville springs must be utilized correctly in order to maximize their benefit. There are several important points when using Belleville springs in a bolting application.Many SolonBelleville Springs are pre-stressed (scragging) by deflecting them to flat as part of the manufacturing process. This flattening procedure results in residual stresses as the spring recovers height from the flat position. Most Belleville springs that are pre-stressed are optimized with the maximum possible load and deflection for any given spring geometry or material. The spring will no longer yield during subsequent loadings. The resultant residual stresses will also increase fatigue life and improve overall spring performance. Pre-stressing is also an excellent inspection method for maintaining the quality of springs. Because pre-stressing produces consistent spring free height, springs that do not meet free height tolerances are rejected.Some standard springs are not pre-stressed for design considerations. If overall height (H) minus Thickness (T) is greater than Deflection (h) value, the part is most likely NOT preset. Consult Solon Manufacturing Co . for preset part information.Not all Belleville spring applications require the spring to be pre-stressed. For special applications, consult a Solon application engineer
A Coil Spring is a mechanical device made of an elastic material formed into the shape of a helix.
A Belleville Disc Spring looks like a washer, but has a spring-like capability due to their conical design.
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Coil Springs and Belleville Disc Springs function similarly. Both products, when compressed, produce potential energy. The springs return to their original position after the load is lifted and the energy is released.
Although these two types of springs function similarly, Mubea Disc Spring stacks have effectively replaced coil springs in many applications. The design of the Belleville Disc Spring gives it the ability to support a very high spring load, but still has a small spring deflection as opposed to the Coil Spring’s functionality. The Disc Spring stack has better space utilization, and can be designed to allow nearly any kind of characteristic curve. Another advantage of choosing a Belleville Disc Spring stack over a Coil Spring is when you are considering the fatigue life of the springs. If breakages occur, the price to replace one spring within the stack is much more cost effective than if you were to replace the whole coil.
Mubea has specialized in the manufacturing of Belleville Disc Springs for many years, beginning with the production of the primary material in the cold-rolling mill on to design. Mubea stocks many different material types in order to satisfy our customer’s requirements.
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