Some personnel who purchase stainless steel gear pumps will ask whether the sealing type of the pump is a packing seal or a mechanical seal. However, they still don’t know much about the specific parameters of mechanical seals and packing seals. In response to this problem, Beihong Pump Industry technicians will tell you some knowledge about mechanical seals.
The so-called mechanical seal refers to an end face that slides relative to one or more pairs of vertical axes. It maintains fit under the action of fluid pressure and the elastic force or magnetic force of the compensation mechanism and is equipped with auxiliary sealing. Shaft seal device to prevent leakage. Commonly used mechanical seal structures are composed of stationary rings, rotating rings, elastic elements, spring seats, set screws, rotating ring auxiliary sealing rings, and stationary ring auxiliary sealing rings. In order to prevent the stationary ring from rotating, an anti-rotation pin is usually fixed on the gland. Rotating rings and stationary rings are often also called compensating rings or non-compensating rings depending on whether they have axial compensation capabilities.
Mechanical seal installation of stainless steel gear pump
During installation, the radial runout tolerance, the axial movement of the rotor, and the surface runout tolerance are required.
Radial runout tolerance refers to the roundness of a certain point on the mechanical seal shaft or sleeve and the deviation of that point on the shaft relative to the datum line.
The inevitable slight movement of the rotor axial movement shaft along the axis direction during operation
The runout tolerance of the surface The runout tolerance of the shaft surface at the joint between the cavity and the sealing end cover
Confirm the component model Whether they are consistent, whether the parts are complete, and pay attention to the rotation direction of the rotating shaft.
Installation steps: Confirm the installation dimensions, lubricate the mechanical seal parts, and install the transmission components.
When using, pay attention to impurity particles, pay attention to whether the torque is too large, and pay attention to the direction of rotation.
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