How to judge the quality of hoisting ring chain, the reliability of chain products refers to "the ability of chain products to complete the specified functions under the specified conditions and within the specified time".
The so-called "specified time" is the core of the definition of reliability, because reliability is a quality index related to time. It refers to the working life of the chain product, which can be expressed in units of time, or can be replaced by periods, times, miles or other units.
In general, the reliability of chain products decreases over time.
So, a certain amount of reliability is a certain amount of time.
The so-called "specified conditions" refer to the operating conditions, maintenance conditions, environmental conditions and experimental specifications of the chain products, etc. These conditions have a direct impact on the reliability of the chain products. Under different conditions, the reliability of the same product is also different.
Therefore, "specified conditions" is the premise of measuring product reliability.
The so-called "specified function" is usually expressed in terms of various performance indicators of the chain product.
Chain products meet the specified performance indicators (such as life, minimum tensile strength, wear resistance characteristics, etc.), even the completion of the specified functions.
Otherwise, the chain product is said to lose the specified function.
The loss of the specified function of the product is generally referred to as the "failure" of the product, and the repairable product is often referred to as the "failure".
It should be noted that, for the same chain of products, the specified energy is generally composed of a number of items, in order of importance.
The so-called "capability" not only has the definition meaning, in the reliability work must also have the quantitative stipulation, in order to explain the product reliability degree.
This is an important basis for improving the reliability of chain products and comparing the reliability of similar chain products.
As the failure of chain products in work is accidental, we should not only look at the situation of a product, but observe a large number of similar products or according to a certain number of sample test data, after mathematical statistics processing, we can determine the level of its reliability.
So the term "capability" in the definition of reliability is statistically significant.
