In the selection of materials and dust ring structure, the properties of the external working medium important characteristics, dirt into group number, particle size, particle strength, wear resistance, etc., the dust seal inside the working medium selection is also affected. Because the main seal of the corrosive material kicked by the permeating membrane of the working medium may damage the dust-proof seal.
According to the characteristics of the enterprise external management working environment media. The use of dust rings can be divided into three categories: light pollution, medium pollution and serious pollution. The economic conditions for the use of dust rings in machinery, machining and forming workshops, Marine machinery, etc., are light pollutions. This kind of pollution is comparable to the general pollution of production plants and workshops, and the main research and development under these historical conditions is to use group I and II dust rings.
For example, construction machinery, automobiles, excavators, casting, forging workshop dust ring use conditions for the second type of pollution, caused by construction derived pollutants, sand, cement, coagulation, all kinds of soil, peat, abrasive slurry, dirt and so on. From pollutants produced by roads, sand containing fine stones, etc. Dirt in the foundry, such as iron filings. Group II and III dust rings are used in these situations.
For example, the working conditions of dust rings used in open pit mines, mines, mines, smelting workshops, corrosive media and corrosive gas chemical production belong to serious pollution. This type of pollution refers to dirt particles of varying particle size, hardness and chemical corrosion, including stone particles and other mineral particles, coal dust, slag, chemical products and waste, usually used in the third group, so sometimes used in the second group of dust rings.