Belleville Washers & Disc Springs
The most widely known type of disc spring is the Belleville washer, or Belleville spring, named after inventor and patent owner Julien Belleville. In reality, however, Bellevilles are just one style of spring washer that fall under the category of disc springs. By definition, a disc spring is a circular component that deforms to a shorter height when subjected to a load along its axis of symmetry. This elastic deformation characterizes the spring action and performs much the same function as a coiled compression spring.
Disc springs provide a great solution in situations when the load required is high and the available space is limited. They can be engineered to provide loading profiles that are not feasible with coiled springs, resulting in a solution that supports a maximum load with minimal space and weight requirements.
One of biggest advantages of disc springs in application, is the ability to configure them in stacks to achieve a desired load and travel. Stack options include parallel stacks that increase the maximum load allowance with each added washer, series stacks that increase the amount of available travel, or the combination of both parallel and series washers to fine tune the resulting spring characteristics for your application requirements.
Benefits of Disc Spring Designs
- High load capacity in a small space not possible with ordinary coil springs
- Maintain high tension in bolted applications
- Act as shock absorbers / perform dampening function
- Load characteristics changed by stacking
When are Bellevilles / Spring Washers Used?
- Applications where a high spring force and small movement is required in a restricted space
- Spring movement is required with a constant pressure (very low spring rate)
- More examples of Spring Washer use