??Sealing performance hydraulic seal

??Is well known, it plays an important role in sealing the hydraulic seal. Different sealing member has different sealing properties. Our hydraulic cylinder as an example of the most common and the most typical form of an O-seal, V-type, Y, etc., these seals for hydraulic cylinders and its main role is to make a straight line reciprocating member to ensure axial sealing.

??When the pressure in the lower range increases, Yx seal will be in a sub-sealed state, this time, the hydraulic oil leakage through the gap Q is very small, almost zero. This is because at a lower pressure, the gap is formed with the deputy seal between the metal member and the pressure difference across the full length of the contact surface with the metal seal decay to zero.

??When acting on the hydraulic cylinder pressure is gradually increased, the output pressure force generated by its external load balancing hydraulic cylinders in normal working condition, with metal contact surfaces exhibit leaking hydraulic seals conform to certain rules, with increasing pressure exhibit a linear increase in the amount of leakage.

??If the cylinder in a long time at a maximum pressure of hydraulic seals can withstand the above work, the sealing performance will be damaged beyond the prescribed amount of leakage occurs, it will lead to permanent failure.

??Above four areas are ubiquitous, but hydraulic seal structure and sealing different forms, and exhibit increased its area toward the pressure or decreasing direction of drift.

??Since there is a hydraulic seal above characteristics, then how to use the seal to avoid large leakage, ensure their normal performance and the use of more reliable is the problem we have to discuss.

??According to the above description, hydraulic seals there is always a different sealing area proper use is a problem in the design of the hydraulic cylinder design first thing to consider. According to a recent experience, we have successfully designed a hydraulic cylinder seal structure to guide sets an example. Hydraulic cylinder design process, we guide from the original single seal sleeve seal was changed to a composite seal, which features each seal has a separate sealing properties, after combined use, the original compensation to each other their sealed cavity region, formed a new seal characteristic curve