【 Weak current College 】 stage machinery safety design (1)

First, an overview
Stage machinery one of the most important indicator is the safe, reliable, and all kinds of stage machinery must be guaranteed at all times is absolutely secure.
On the stage machinery reliability design, very few of the present study. Reliability design theory is built on a large number of experimental data, on the basis of different applications require different reliability, equipment reliability is based on its important, work requirements and ease of maintenance, and other factors into consideration. The stage machinery of the usage is not high, load rate is low, the life design a set of requirements and design for reliability is very high, because in the event of a problem may result in serious accidents or large economic losses. Stage machinery must have a high reliability, failure probability should be 0.1 ~ 1.0%. Due to the lack of the necessary experimental data and specific in-depth research, reliability and design theory at the stage of mechanical design, there is no specific application. Research shows that although only safety factor does not completely reflect the reliability level, but on the stage in the design of the mechanical components of the arguments as random variables, there is a lack of adequate data. Therefore, the design parameters used for determining the amount of stress intensity factor of perhaps as a differentiator, by selecting the appropriate safety factors to approximate control its reliability, remains the current stage machinery design-led approach. As a result of calculation results and the actual situation has some deviations, it must be made to compute the allowed parts of bearing capacity necessary for the safety margin, this is the starting point for determining the basic safety factor. Typically, the stage machinery should also propose design life indicators. The length of life of indicators on the stage machinery does not apply to work hours in the life of the more realistic, 8000 ~ 10000 hours of working life should be the basis for the stage machinery design.
The stage machinery of security indicators including device security, physical security and electrical safety aspects, and that these three factors associated with each other, mutual influence, sometimes are inseparable.