Disc spring is a conical disc spring that can withstand load, suitable for equipment with high temperature and high pressure or working pressure and temperature instability. It acts as a buffer, maintains the sealing performance, and protects the stud from fatigue damage caused by overload. The surface of the disc spring is serrated, which can play a locking role. Elastic compensation increases frictional resistance, prevents loosening, and keeps the bolt in a good locking state for a long time.
Currently widely used in metallurgy, engineering, electric power, machine tools, construction and other industries. For example: molds, brackets, clutches, brakes, bridge buffer (shock absorber) devices, bearing preload, safety overload devices, heavy machinery, mechanical starters, control devices, valves, industrial electric furnaces, indexing devices, clamping devices, etc.
The difference between disc spring and ordinary spring washer:
1. The disc spring sets the pre-tightening force according to different bolt specifications and materials as the compensation for the bolt pre-tightening force; the torque compensation of ordinary spring washers is generally in the failure area of the disc spring, and cannot provide effective bolt pre-tightening force compensation.
2. When the disc spring is in the effective working area, the pressure and the stroke have a linear relationship; ordinary disc spring washers are parabolic. Therefore, the compensation force of the common spring washer will decrease to a certain extent with the increase of the bolt preload, while the compensation force of the disc spring will reach an effective preload with the increase of the bolt preload.
Compared with other types of springs, the deformation energy per unit volume of the disc spring is larger, and it has better buffering and shock absorption capabilities. In particular, due to the effect of surface friction damping, the use of superimposed combinations can absorb shocks and dissipate energy more significantly.
Bolt loosening is closely related to periodic impact forces and bolt loosening. The greater the impact force, the greater the energy that generates the amplitude, and the easier the bolt is to loosen; the higher the impact frequency, the shorter the vibration period and the faster the preload loss. To solve the problem of loose bolts, M64 preloaded disc springs can be used. The disc spring adopts advanced processing technology, which is small in size, large in load and concentrated in load transmission. It can effectively absorb mechanical vibration and avoid bolt loosening caused by mechanical vibration. When the bolt is loose, the high temperature preloaded disc spring releases some potential energy to maintain the pressure between the flange connections and meet the very low sealing requirements. When the bolt is tightened, the absorbed mechanical energy is converted into potential energy and stored in the disc spring.
When the pre-tightening force of the bolt is loosened due to temperature change, pressure change or mechanical vibration, the released potential energy is converted into mechanical energy to compensate the pre-tightening force of the bolt, so that the pre-tightening force of the bolt is always kept at the pre-tightening force required by the high temperature disc spring. within the tightness range. After installing the preloaded disc spring, the bolt loosening problem of the device has been satisfactorily resolved. The average loosening period has been extended from 3 days to 2 months, and the free height reduction after disassembly is only within 10%, which is allowable in the design and application of the preloaded disc spring, and can still be used.