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ZL40/50型装载机用变速器大多采用机液换挡变速操纵阀,因长期在恶劣的环境中使用,存在如下问题:油品太脏使变速操纵阀的平衡阀节流孔堵塞,主油压不能建立;变速器挡位切换时瞬间液压冲击过大。以上问题不仅影响装载机正常作业,还增加维修成本。为此,制造企业多年来都在不断探索和改进。以前,平衡阀节流孔设计为φ0.8 mm,但由于油品中的铁屑、异物和油品焦化物经常堵塞节流孔,于是将原φ0.8 mm节流孔逐渐加大至φ1.0 mm。节流孔加大后堵塞
ZL40 / 50 loader transmission with hydraulic shift gear control valve, because of long-term use in harsh environments, there are the following problems: Oil is too dirty to make the gear shift control valve orifice throttling, the main oil pressure Can not be established; transient hydraulic shock when transmission gear shift is too large. The above problems not only affect the normal operation of the loader, but also increase maintenance costs. To this end, manufacturing companies are constantly exploring and improving over the years. In the past, the balance orifice was designed to have a diameter of 0.8 mm, but since the iron filings, foreign matter and oil coking in the oil often clogged the orifice, the orifice of the original φ0.8 mm was gradually enlarged to φ1 .0 mm. Orifices increased after the blockage