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１前言出口节流调速回路结构简单，经济性好，广泛使用于中、小功率的机床、农业机械、液压机具等液压系统中。实践中发现，回路中元件主参数选择不当会导致爆管、元件损坏及噪声等故障，影响液压系统的正常工作。本文主要提出回路元件的额定流量、额定压力两个主参数的选择原
1 Introduction Export throttle governor circuit structure is simple, economical, widely used in medium and low-power machine tools, agricultural machinery, hydraulic equipment and other hydraulic systems. In practice, improper selection of the main parameters of the circuit components can lead to faults such as squibs, component damage and noise, affecting the normal operation of the hydraulic system. In this paper, the main components of the loop circuit rated flow rate, the pressure of the two main parameters of the original choice