The performance and life of the factors that affect a seal. Surface roughness. And the piston rod surface roughness? Like. 8, the roughness of the sealing groove Shian mounted side 1.6, a base R 3.2. Rod quenching hardness HRC55-60, chrome thickness 30 ~ 501 ~ m, after plating rod to be no trace except for grinding spiral. 2. Q clearance. Mainly refers to the seal or the seal mounting slots snug fit with the gap in the low-pressure side of the face. Seals in Shantou music action will produce plastic deformation and flow, seals tend to be cramped with the roots have clearance. In order to ensure the performance of the hydraulic cylinder, precision and life, often setting the seal structure-oriented components. Seal friction ago, after a gap due to pressure on the state seal and even different types and materials. 3. Speed. Film thickness related to the speed of the reciprocating motion. High speed film thickness, easy cow leak; rate is too low (Ding 0.05m / s,) the film is too thin, the friction increases, prone to "crawl." 4. Temperature. The impact of changes in oil viscosity, film thickness and sealing properties of the oil. To ensure good sealing performance, the hydraulic system should be stabilized operating temperature of 40 to 80. C. 5. Pressure. Hydraulic cylinders can be deformed to seal the seal effect, but also increased the wear of the sliding surface, causing fever, temperature rise and cause the system to further increase the sliding resistance. So in actual use must be strictly controlled pressure. This is also the need to ensure the seal so that life. A sealing member in the life of 16MPa 6MPa hydraulic system for two years; if the hydraulic system for shortening 1MPa two months: for use in a liquid 31.5MPa "Yu manipulation system life of only 0 days . 6. Contact pressure. Contact pressure must be moderate, to form a continuous thin film layer. If the contact pressure is too small, then the oil film thickness, easy to leak; contact pressure is too large, the film is too thin, easily lead to dry friction, shorten the service life of the seal. 7. Friction. Friction seal with the moving member is varied. When you start the maximum friction (dry friction), when it reaches the appropriate speed, the friction between the formation of a continuous film, friction decreased friction velocity is too high, the film thickening, anti-friction increases. 8. Media. To meet the various requirements of different hydraulic oil additives added. Additives for sealing material compatibility and service life will have a greater impact, you must select the appropriate sealing materials according to the oil. 9. Cleanliness. Pollution control liquid oil is generally NAS9 pawls level, that is greater than the diameter of the oil & concentration of 101 ~ m dirt particles must Ding 3mg/100ml. [Company Name] Tengzhou Machine Co., Ltd. Heng Noda [Sales Manager] Mr. Sun [Hotline] 0632-5168661 [Business Phone] 13356372661 [Main products] small hydraulic machine hydraulic machine hydraulic single column hydraulic press machine with three girder gantry column hydraulic pressure machine poster hydraulic presses, hydraulic arm beam four-post hydraulic presses three single-column hydraulic press machine hydraulic gantry small hydraulic machine [corporate website] http://www.youyaji1.com http://www.hengnuoda.com/ http://www.yxyeyaji . com [Address] Economic Development Zone Industrial Park South Tengzhou