履带需经常检查张紧度,以减缓履带的磨损。传统的张紧方式多为黄油张紧缸和高强度弹簧的组合。维护繁杂、劳动强度大,而且卸荷的黄油易对外部环境造成污染。改进型免维护履带液压张紧装置,采用自动充液卸荷阀,整机在正常工作过程中可自动对张紧装置进 Track often need to check the tension, to reduce crawler wear. Traditional tightening methods are mostly butter tension cylinder and high-intensity spring combination. Maintaining complex, labor-intensive, and unloading of the butter easy to pollute the external environment. Improved maintenance-free hydraulic track tensioning device, the use of automatic filling unloading valve, the whole process of automatic work in the tensioning device into