The effect of the basic components of the mechanical seal

The effect of the basic components of the mechanical seal

21/12/13 08:55:12

The mechanical seal is composed of a variety of components to better use the equipment, but in the composition of the sealing equipment, the performance advantages of each component are different, so I will introduce it in detail next, so as to better Make good use of its efficiency.

1) End-face conflict pairs (static and dynamic rings)

The friction pair must ensure a tight fit and form a sealing surface to avoid medium leakage. This requires the friction pair of pump seals to have good wear resistance; the moving ring can move axially to automatically compensate for the wear of the sealing surface, so that it fits well with the static ring; the static ring has a buoyancy and cushioning effect.

2) Elastic elements (springs, bellows, diaphragms, etc.)

It mainly plays the role of compensation, pre-tightening and cushioning, and is also a factor for generating a reasonable specific pressure on the sealing end face. It is required that the mechanical seal of the kettle always maintain elasticity to overcome the friction between the auxiliary seal and the transmission part and the inertia of the moving ring, etc., to ensure the good fit of the end-face friction pair and the compensation effect of the moving ring.

3) Auxiliary seals (O-rings, V-rings, wedge rings and other special-shaped sealing rings)

It mainly plays the role of sealing the relative stopper, and also plays the role of floating and cushioning. It is required that the auxiliary sealing element of the static ring can ensure the sealing between the static ring and the gland and make the sealing ring have a certain floatability; the auxiliary sealing element of the moving ring is required to ensure the sealing between the moving ring and the shaft sleeve. The material should be heat-resistant, cold-resistant and compatible with the medium.

4) Transmission parts (transmission pin, transmission ring, transmission seat, transmission sleeve, transmission key)

It has the effect of transmitting the torque of the shaft to the moving ring; the transmission pin, pressure ring, transmission ring, transmission pin and transmission seat of the center center transmission all play a transmission effect. The material requires corrosion resistance and wear resistance.

5) Fasteners (set screws, spring seats, glands, assembly sleeves, bushings)

It plays the role of positioning, fastening and decoration of static and dynamic rings. It is required to be positioned correctly, to ensure that the frictional sealing surface is in the correct position, and to maintain a good fit of the spring specific pressure. At the same time, it is required to be easy to disassemble, easy to place, and to be able to repeat the effect. At the joint with the auxiliary seal, attention should be paid to the chamfer of the installed seal ring and the amount of spring pressure of the ring. In particular, attention should be paid to the corrosion resistance of the joint of the auxiliary seal ring of the moving ring and the shaft sleeve. , wear resistance, hard surface coating can be used if necessary.

The above are the five major components of the mechanical seal. The performance of each component is introduced in detail above, so that we can better use the equipment and reduce the occurrence of failures.