What is the service life of the disc spring in hydraulic bolts?
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Dear everyone, how many years is the typical service life of the hydraulic bolt disc springs used in coking top cover machines and bottom cover machines? How is it being used by various parties? Was it replaced, and after how long was it replaced? I hope everyone will not hesitate to offer their advice! Thank you! ! !
One year is way too short to use it
The conditions specified by the poster are not clear enough; the service life of disc springs is closely related to the operating conditions in the field as well as the choice of disc spring type. Generally, an appropriate selection is made based on the actual working conditions on site; disc springs in accordance with DIN2093 standards have a fatigue life of 2 million cycles. Based on this, it can be assumed that these disc springs do not need to be replaced throughout the entire service life of the equipment. There are simpler methods on site to determine whether the force value of the disc spring meets the standards; further discussion is welcome. Thank you.
You mentioned that “there are simpler methods on site to determine whether the force value of the disc spring meets the standards.” What exactly are these measurement methods? Do you have specialized equipment for that?
1. The lifespan of a disc spring is related to the load applied to it, as well as to the operating environment factors such as corrosion, temperature fluctuations, and stress variations. 2. For the same required load, it is possible to use a single disc spring that undergoes greater deformation, or a set of multiple discs stacked together to achieve less deformation; obviously, the former experiences higher stress and thus has a shorter lifespan； The latter has lower stress levels and a longer service life. 3. The fatigue life of disc springs according to the DIN2093 standard is 2 million cycles; this figure is based on specific conditions, and it does not mean that disc springs meeting this standard will necessarily have such a long service life. 4. Disc springs are components subject to high stresses. For those intended for use in petrochemical flanges, the service life promised by manufacturers often differs from what users require, and in some cases, even one operating cycle is not sufficient. Disc springs have their advantages, but they also have their disadvantages.
We usually replace the disc spring of our roof machine every three years. The disc spring of the hydraulic bolt on the bottom cover is said to have a service life of three and a half years. We have been using it for four years now. I’m planning to replace them gradually.