Home
<p>The machine itself has a congenital deficiency of misalignment between the center of the cylinder and the center of the crosshead slideway, which causes the piston rod to deflect and vibrate, which greatly affects the filler. The start-up time does not exceed 15 minutes, the temperature can rise to 80 ° C, and the running-in time of the newly changed filler can reach one week, and sometimes it needs to be repaired. The packing <a href="https://www.lepuseal.com/" target="_blank">seal</a> ring comes from the manufacturer with a single straight cut. Therefore, the first packing chamber has a small leakage and a large pressure difference, so it wears quickly and loses its sealing effect. In turn, wear and tear quickly. In addition, the inner and outer rings of the seal ring are easily disengaged. The opening gap of the seal ring in the circumferential direction is too small. Generally, the inner ring s = 1mm and the outer ring s ′ = 1.2mm, which cannot be compensated after wear, and will cause deformation of the inner diameter and tighten the piston rod. In this case, the pressure difference is very large, the wear is fast, and the inner ring will be hooped on the piston rod, which will cause axial displacement of the inner and outer rings, and in severe cases will damage the piston rod.</p><p><br></p><p>The gap a between the<a href="https://www.lepuseal.com/" rel="noopener noreferrer" target="_blank"> seal </a>ring and the end face of the seal box is too small, generally 0.14mm, which makes the pressure of the seal ring and the stuffing chamber very small, and the axial thermal expansion of the ring is limited. The friction with the end face of the stuffing box cannot make the ring and the rod fit, which can cause gas leakage. The sealing effect is greatly reduced. The surface of the piston rod is not clean, and it is easy to scratch the inner ring of the seal ring, resulting in a tight seal. The bottom surface of the stuffing box is not flattened, causing excessive gaps and air leakage. The spring force is too tight, the sealing ring cannot expand freely after heating up, and the wear is accelerated. The cooling water path is thin, the circulating water is dirty, it is easy to be blocked, and the cooling effect is lost. If the cooling water is interrupted, the stuffing box will heat up quickly. If it is not found and stopped in time, the packing seal ring and the piston rod may be damaged. The quality of grinding during maintenance is not good, such as cutting the cut into chamfered edges, or the cut is not properly positioned, which can cause air leakage.</p><p><br></p><p>After the new seal ring is changed, when running at no load, I am afraid that the temperature will be too high, so I dare not run continuously for a long time. Use the instrument air to blow the piston rod and stuffing box to reduce the temperature. Because the temperature cannot be measured, it can only be guaranteed. Run-in at a lower temperature, but prolong the run-in time. <a href="https://www.lepuseal.com/" rel="noopener noreferrer" target="_blank">Mechanical</a> seal double end face seal has axial double end face seal and radial double end face seal. The double-face seal structure arranged in the radial direction is more compact than the axial double-face seal. Double-face seal is suitable for the medium itself with poor lubricity, toxic, flammable, explosive, volatile, abrasive particles and gas.</p><p><br></p><p>The axial double-end <a href="https://www.lepuseal.com/" rel="noopener noreferrer" target="_blank">seal </a>has a face-to-face or back-to-back arrangement. When working, it is necessary to introduce a sealing liquid between the two pairs of end faces at a pressure higher than the medium pressure of 0.05 to 0.15 MPa to improve the lubrication and cooling conditions between the end faces and isolate the medium from the outside world. It is possible to achieve zero leakage.</p>
products
