论文部分内容阅读
近年来,气压操纵逐漸取代机械杠杆式及液压操纵,开始在自行式起重机及单斗挖掘机中获得广泛的应用。差动閥是气压操纵系統的主要部件之一,它是一种可以調节气体工作压力的控制閥。我厂曾作了差动閥靜态特性的試驗,并拟定了一种計算方法。現将这一計算方法及試驗結果作一簡要介紹。差动閥的工作过程图1为差动閥的結构。a为压縮空气进口,通常与储气筒相連接。c为出气口,压縮空气由此流往工作气缸(活塞式、膜片式气缸、气室等)。d为排气孔,它与大气相通。在上下閥体之間固定有圓形橡皮膜片4。閥头1与操纵手杆上的凸輪接触。
In recent years, pneumatic control has gradually replaced mechanical lever and hydraulic control, and began to be widely used in self-propelled cranes and single-bucket excavators. Differential valve is one of the main components of the pneumatic control system, it is a control valve can regulate the working pressure of the gas. Our factory has made the test of differential valve static characteristics, and developed a calculation method. Now this calculation method and test results for a brief introduction. Differential valve working process Figure 1 for the differential valve structure. a is compressed air inlet, usually connected with the air reservoir. c for the outlet, the compressed air thus flows to the working cylinder (piston, diaphragm-type air chamber, etc.). d for the vent, it communicates with the atmosphere. A circular rubber diaphragm 4 is fixed between the upper and lower valve bodies. The valve head 1 is in contact with the cam on the lever.