直流液压电磁阀通断响应性能分析与测试

为了获得影响直流液压电磁阀通断响应性能的主要因素及其相互关系,通过以K-01-D12型直流液压电磁阀为例,在剖析其结构和工作原理的基础上,对其通断特性进行了理论分析,从电磁力、弹簧力、摩擦力、液压油阻力等方面建立了其开启和关闭时的衔铁运动学模型.设计了以工控机为上位机、单片机为下位机的液压电磁阀性能测试平台,对模型进行了部分测试验证,理论分析和测试结果表明:直流液压电磁阀通断响应性能与液压油的温度、复位弹簧的倔强系数等因素密切相关.油温越高,液压油黏性阻尼系数越低,其通断响应时间越快,但温度过高容易导致泄漏,影响效率;复位弹簧倔强系数越大,电磁阀单腔开启时间越慢,关闭时间越快,但对电磁阀两腔之间直接切换影响不大.

Performance analysis and test on on-off response of DC hydraulic solenoid valve

In order to obtain the main factors affecting the on-off response performance of the DC hydraulic solenoid valve and their specific relationship. Taking the K-01-D12 type DC hydraulic solenoid valve as an example, on the basis of analyzing its structure and working principle, the theoretical analysis of its on-off characteristics were carried out. The kinematic model of armature was established from the aspects of electromagnetic force, spring force, friction force, hydraulic oil resistance and so on. Designing the hydraulic solenoid valve performance testing platform with industrial control computer as upper computer and single chip computer as lower computer, and the model was partly verified by experiments. The theoretical analysis and the experimental results show that the on-off response performance of DC hydraulic solenoid valve is closely related to the temperature of hydraulic oil, the stubbornness coefficient of reset spring, etc. The higher the oil temperature, the lower the viscous damping coefficient of hydraulic oil, the faster the on-off response time, however, the excessive temperature can easily lead to the leakage and affect the efficiency. The greater the reset spring stubbornness coefficient, the slower the opening time and the faster the closing time on single cavity operation, but the less effect on the direct switching between the two cavities of solenoid valve.