The functions of the basic components of the mechanical seal are as follows:

(1). The end-face friction pairs (moving and static rings) are kept in close contact to form the sealing surface to prevent medium leakage. The moving and static rings are required to have good wear resistance, and the moving ring can move axially to automatically compensate for the wear of the sealing surface. It fits well with the static ring, and the static ring is floating and has a buffering effect;

(2). Elastic elements (springs, corrugated plates, serpentine sleeves, etc.) mainly play compensation, pre-tightening and buffering functions, and are also factors that produce a reasonable specific pressure on the sealing end face. It is required to always maintain elasticity to overcome auxiliary seals and transmission parts. Friction, start ring compensation. The material requires corrosion resistance 0;

(3) Auxiliary seals (0-ring, V-ring, wedge-shaped ring and other special-shaped sealing rings) mainly play the role of sealing the static ring and the moving ring, but also play the role of floating and buffering. The auxiliary of the static ring is required The sealing element ensures the sealing performance between the static ring and the gland, so that the static ring has a certain degree of floating; the auxiliary sealing element of the moving ring guarantees the sealing between the moving ring and the shaft or sleeve. The material requires heat resistance and cold resistance. Medium approach

(4). Transmission parts (transmission pins, transmission rings, transmission seats, transmission sleeves, transmission keys, transmission lugs or jaw couplings), whose function is to transmit the torque of the shaft to the moving ring. The material requires corrosion resistance And wear resistance;

(5). Fastening parts (set screw, spring seat, gland, assembly sleeve, shaft sleeve) play the role of positioning and fastening the static and moving rings. Correct positioning is required to ensure that the sealing surface of the friction pair is in the correct position , And maintain a well-fitting spring specific pressure; at the same time, it is required to be easy to disassemble, easy to place, and reusable. At the place where the auxiliary seal is matched, attention should be paid to the chamfer and the amount of spring pressure of the seal ring, and pay special attention to the moving ring seal ring and Corrosion resistance and abrasion resistance are required for the matching part of the shaft sleeve, and hard surface cladding is used when necessary.