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溢流阀的阀芯和弹簧构成质量一一弹簧系统,因此溢流阀的导阀和主阀都有其各自的固有频率。溢流阀在使用时,若导阀或主阀的固有频率与系统上的某个振源频率,例如泵的流量或压力脉动频率相同,就要发生谐振,使系统产生振动和噪声。为了避免发生这种现象。必须了解溢流阀的固有频率和影响因素,因此,本文用理论分析方法,研究推导溢流阀的固有频率,分析对它有影响的主要参数,并用试验验证。结果令人满意,理论分析与试验验证十分相符,其结论对正确使用溢流阀和设计液压系统是有意义的。研究对象是Y-10B型先导式溢流阀,其额定压力为P=6.3MPa,额定流量为Q=10L/min,阀的结构示意见图1。
The relief valve spool and spring constitute a mass one by one spring system, so the relief valve pilot valve and the main valve has its own natural frequency. When the relief valve is used, if the natural frequency of the pilot valve or main valve is the same as a certain vibration source frequency on the system, such as the flow rate of the pump or the pressure pulsation frequency, resonance will occur and the system will generate vibration and noise. In order to avoid this phenomenon. Therefore, we must know the natural frequency and influence factors of the relief valve. Therefore, in this paper, the natural frequency of the relief valve is studied and deduced by theoretical analysis. The main parameters influencing the relief valve are analyzed and verified by experiments. The results are satisfactory, the theoretical analysis is in good agreement with the experimental verification, and its conclusion is of significance for the proper use of relief valves and the design of hydraulic systems. The research object is Y-10B pilot-type relief valve, the rated pressure of P = 6.3MPa, rated flow Q = 10L / min, the valve structure shown in Figure 1.