The main function of the piston rod packing ring is to seal the gap between the cylinder seat and the piston rod, so as to prevent the piston rod from leaking. In the piston rod packing, there are generally three gaps, namely:
Axial clearance: It is mainly used to ensure that the packing ring can float freely, otherwise the piston rod cannot work normally.
Radial clearance: so as not to press the packing ring due to the sinking of the piston rod, so as not to deform or damage it.
Notch clearance: mainly used to compensate for the wear of the packing ring.
The processing technology of the piston rod is also a very important part. The quality of its processing technology will directly affect the quality of the piston rod and its service life.
The processing of the piston rod is generally carried out by rolling, because this processing method can increase the corrosion resistance of the surface of the piston rod, suspend the generation and expansion of fatigue and cracks, thereby increasing the fatigue strength of the piston rod.
In addition, by rolling, the surface roughness can also be reduced, and the occurrence of wear can be reduced, so that the service life of the piston rod can be increased as a whole.
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