针对液压缸活塞杆刮伤问题的改造

Improvement on the hydraulic piston to prevent scratches on it

重量较大的活塞杆长期使用会造成活塞刮伤,通过对其密封结构及密封形式进行改造,可以避免由此产生的活塞杆刮伤及渗油等问题的出现。

Heavy pistons would be scraped after longtime use. Through some reform on their sealing structure and form, the problem of scratches on the piston has been solved.