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几年来的使用实践证明,三系列齿轮油泵能较好地满足六十马力以下的拖拉机液压悬挂系统的性能要求,亦可作为30马力以下农用拖拉机的工业变型所需的液压动力。据用户反映,油泵前后盖上四个φ27×3.1的0形密封圈(图1)易损坏,引起油泵前盖上的骨架油封被冲坏,使大量液压油外漏,造成液压系统失去工作能力。尤其在液压系统采用单独油箱的结构中,当骨架油封一旦被冲坏后,不仅使油泵失去工作能力,而且在很短时间内就会造成油泵严重吸空现象,致使油泵烧坏。 为了探求以上故障产生的原因和解决办法,于一九七三年二月至三月在我所试验台上作了改进试验,改进项目为将轴套由双面压紧改为单面压紧,并在后盖密封圈加保护挡圈。
The practice of several years has proved that the three series of gear pumps can better meet the performance requirements of tractor hydraulic suspension systems under 60 horsepower and hydraulic power as the industrial variant of farm tractors under 30 horsepower. According to the user, the oil pump is covered with four φ27 × 3.1 O-ring seals (Figure 1), which can damage the oil seal on the front cover of the oil pump and cause a large amount of hydraulic oil to leak out, thus resulting in the hydraulic system losing its ability to work . Especially in the hydraulic system using a separate tank structure, once the skeleton oil seal once damaged, not only the loss of work ability of the pump, but also in a very short period of time will result in a serious pump suction phenomenon, resulting in oil pump burn out. In order to find out the causes and solutions of the above failures, an improvement test was conducted on our test rig from February to March 1973. The improvement project was to change the sleeve from double-sided compression to single-sided compression , And in the back cover ring with protective ring.