What are the characteristics and applications of high temperature disc springs?
Disc springs are washer springs with a truncated conical section made of sheet metal or forged blanks. Its shape is a conical disc, which is different from a traditional spring. Its main features are large load, short stroke, small space required, convenient combination and use, convenient maintenance and replacement, high economy and safety. It is suitable for precision heavy machinery with small space and large load. Its compression stroke is well used in the range of 10%-75% of its large compression stroke.
Features of high temperature disc spring:
a. Changes in medium pressure lead to changes in preload. The high temperature disc spring can compensate for the change of preload force caused by the change of medium pressure and prevent the failure of bolts and washers.
b. It can effectively absorb mechanical vibration caused by high temperature and effectively avoid mechanical vibration.
High temperature disc spring application equipment: steel pipe bridge beams and columns; bearing preload, rolling bearing seat, main shaft; flywheel drive overload protection; mechanical starter;
Disc springs can be used alone or in combination with multiple disc springs for static or variable loads. If a single disc spring cannot meet the travel requirements, a combined disc spring group consisting of a single disc spring should be used. A group of single-coil springs that overlap in the same direction is called an overlapping combined-coil spring. Instead, a set of single-coil springs alternately overlapped in different directions are called split-combination-coil springs. In the case of superimposed combination, the deformation of the disc spring group is the same as that of a single spring, and the load at a given deformation is n times that of a single spring (n = the number of individual spring leaves in the disc spring group). In the case of the involute combination, when the disc spring set is deformed, the sum of the deformation and load of the individual springs in the spring set is the same as the single spring. The above factors should be considered when calculating the deflection and load of a composite disc spring consisting of a single disc spring or spring group.
The incremental load characteristic curve can be obtained by combining a combination spring composed of different disc springs or a single disc spring with different thicknesses into a disc spring group. In this case, the single or combined spring will no longer have an influence on the deformation of the spring after the spring pack has reached the collapsed position or limit travel. High temperature preloaded disc springs are gradually adopted by various manufacturers due to their advantages of small footprint, easy installation and use, strong preload compensation ability, safety and reliability. At present, it has been widely used in equipment flanges or pipeline flanges and valves in electric power, steel, chemical, machinery, mining, petrochemical and other industries. It is especially suitable for bolt preloading of various flanges in high temperature environment.
Disc springs mainly rely on preload deformation to prevent loosening. From the working principle, the thicker the disc spring, the greater the tension provided, and the greater the resisting pulse pressure; the thinner the disc spring, the greater the ratio of free height to thickness, and the greater the allowable deformation. Since the tension determined by the thickness of the disc spring is inversely proportional to the deformation, this is a pair of contradictions. When the tension or deformation provided by a single disc spring cannot meet the requirements of the working conditions, it can be solved by combining the disc springs.