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&nbsp; &nbsp; &nbsp; &nbsp; <strong>&nbsp; &nbsp;  Twisted damage </strong>
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&emsp; &emsp; There are many reasons for the distortion damage, the most important of which is due to the uneven gap between the piston, piston rod and cylinder, excessive eccentricity, uneven diameter of O-ring section, etc., due to the uneven friction caused by the O-ring in more than a week, some parts of the O-ring friction is too large, distorting. Usually, O-rings with small section size are prone to uneven friction. Cause distortion (for this reason, the section diameter of the motion O-ring is larger than that of the fixed O-ring). In addition, due to the coaxiality deviation of the sealing groove, the unequal sealing height and the uneven diameter of the O-ring section, one part of the O-ring may be compressed too much, and the other part is too small or not compressed. When the groove has eccentricity, that is, the coaxial deviation is greater than the compression of the O-ring, the seal will completely fail. Another harm of the large coaxiality deviation of the sealing groove is the uneven compression of the O-ring along the circumference. In addition, due to the influence of O-ring cross-section diameter, material hardness, lubricating oil film thickness, and the surface roughness of the sealing shaft, one part of the O-ring slides along the surface of the workpiece, and the other part rolls, resulting in the distortion of the O-ring. Movement makes the ring easily damaged by distortion, which is an important reason for the damage and leakage of the sealing device. Therefore, improving the machining precision of the sealing groove and reducing the eccentricity are important factors to ensure that the O-ring has a reliable sealing and life. The sealing ring should not be installed so that it is in a twisted state. If it is twisted during installation, distortion damage will occur quickly. During operation, the distortion phenomenon will cut off the O-ring, producing a large amount of oil leakage, and the cut O-ring will mix with other parts of the hydraulic system, causing a major accident.
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&emsp; &emsp; In order to prevent the < a href = "http://www.whhdpk.cn/oxingquan.html" target = "_blank" > < / a > distort damage O rings, when the design should pay attention to the following points.
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&emsp; &emsp; 1) The concentricity of the O-ring installation groove should be considered from the two aspects of easy processing and no distortion.
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&emsp; &emsp; 2) The O-ring section size should be uniform, and the sealing part should be fully coated with lubricating oil or grease during each installation. Sometimes it is also possible to use a felt ring type oiling device impregnated with lubricating oil.
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&emsp; &emsp; 3) increase the < a href = "http://www.whhdpk.cn/oxingquan.html" target = "_blank" > o-ring cross section diameter of < / a >, dynamic seal with O ring cross section in diameter should be greater than the static sealing o-ring; In addition, O-rings should be avoided as seals for large diameter pistons.
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&emsp; &emsp; 4) When distortion damage occurs at low pressure, sealing rings can be used to protect the retaining ring.
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&emsp; &emsp; 5) Reduce the surface roughness of cylinder and piston rod.
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&emsp; &emsp; 6) O-shaped sealing rings are made of materials with low friction coefficient.
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&emsp; &emsp; 7) The O-ring can be replaced by a sealing ring that is not prone to distortion.
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To order or request more information, please call <span>86+027-88779150</span> or submit <a style="color:#E56600; font-size:15px; display:inline;"  Href = "http://www.whhdpk.cn/xunjiaxinxi.html" target = "_blank" > product ZiXunBiao < / a >.
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