Key points of reliability design for exhaust gas treatment equipment
1) Determine the reasonable safety factor of the parts
The safety factor refers to the ratio of the theoretically calculated load-bearing capacity of a component to the actual load it can bear. When determining the safety factor, the following factors should be considered.
(1) The influence of environmental conditions, such as temperature, humidity, shock, vibration, etc.
(2) The consequences of overloading or misoperation when using the equipment.
(3) Whether the economic cost of improving the safety factor is cost-effective, etc.
The improvement of safety factor should be achieved by optimizing the structural design H, rather than simply increasing component size, weight, or cost.
2) Reserve design (redundant design)
Reserve design refers to using several components with the same function as backup mechanisms. When one of the components fails, the backup mechanism will immediately start working, so that the machine can still maintain normal operation. For example, in a rolling bearing, when one row of double row ball bearings is damaged, the other row can still maintain normal operation
Products that adopt reserve design are generally highly toxic chemical equipment, equipment with high failure rates, key equipment on production lines, or equipment with significant losses in case of accidents.
The purpose of reserve design H is to improve reliability. If blindly adopted or designed in combination, it will result in the opposite effect due to increased volume, weight, and cost.
3) Environmental resistant design
In product design, the influence of environmental conditions should be considered, and mechanical stress resistance (vibration, impact, etc.) design and climate resistance (high temperature, low temperature, humidity, rain, exposure to sunlight, weathering, corrosion, etc.) design should be carried out. When designing, it should be anticipated that the product will actually make
Use appropriate environmental conditions and take corresponding measures to withstand the environment. Therefore, laboratory simulations or on-site reliability tests under expected environmental conditions should be conducted during the design and trial production stages, such as durability tests, life tests, environmental tests, reliability determination, and reliability verification tests.
4) Simplified and standardized design
In the design, mature technologies and structures should be used as much as possible, and the number of components should be minimized. Standardized components should be used to ensure the reliability of the entire system and the achievement of the H-standard. Simplification and standardization of products are key to improving reliability, that is, the simpler the structure of the product while meeting functional requirements, the better, because with fewer components, the chance of failure is reduced.