Main components and functions of mechanical seal:
Static and dynamic ring: ensure close fitting and form a sealing surface to avoid medium leakage. This requires that the static and dynamic ring of Mechanical seal for pump should have excellent wear resistance; The moving ring can move axially to actively compensate for the wear of the sealing surface and make it fit closely with the stationary ring; The static ring has buoyancy and cushioning effect.
Elastic elements: tension spring, bellows, estrangement, etc. It mainly plays the role of compensation, pre tightening and cushioning, and is also the element of reasonable specific pressure on the sealing end face. It is required that the agitator mechanical seals always adhere to elasticity to overcome the conflict between the auxiliary seal and the transmission parts and the inertia of the moving ring, so as to ensure the close fitting of the static and dynamic ring on the end face and the compensation effect of the moving ring.
Auxiliary seals: O-ring, V-ring, wedge-shaped ring and other special-shaped sealing rings should not only seal the relative stop parts, but also float and buffer. The auxiliary sealing element of the static ring is required to ensure the tightness between the static ring and the gland and make the sealing ring have certain floatability; The auxiliary sealing element of the request moving ring can ensure the sealing between the moving ring and the shaft sleeve. It shall have heat-resistant and cold resistant functions and be compatible with medium touch.
Transmission parts: transmission pin, transmission ring, transmission seat, transmission sleeve, transmission key, etc. it has the effect of transmitting the torque of the shaft to the moving ring; The transmission pin, pressing ring, transmission ring, transmission pin and transmission seat of the central transmission all play a transmission effect. Corrosion resistance and wear resistance of data request.
Fasteners: set screw, tension spring seat, gland, assembly sleeve, shaft sleeve, etc. it plays the role of positioning, tightening and holding of static and dynamic rings. It is required to position it accurately, ensure that the secondary sealing surface is in the correct position, and adhere to the tension spring ratio of excellent fit. Attention shall be paid to the chamfering of the sealing ring of the device and the pressure elasticity of the ring at the cooperation with the auxiliary seal. In particular, attention shall be paid to the corrosion resistance and wear resistance of the cooperation between the moving ring, the auxiliary seal ring and the shaft sleeve. If necessary, hard surface coating can be adopted.
