Abstract:Based on teaching reform of hydraulic transmission course, a hydraulic teaching experiment device was developed. The device consisted of conventional hydraulic pumps, hydraulic control valves, hydraulic cylinders, and hydraulic auxiliary components. The device included many basic hydraulic circuits, such as pressure regulation circuit, flow control circuit, differential circuit, double pumps circuit, sequence control circuit, pressure reducing circuit, pressure holding circuit, and unloading circuit. Application of the device for hydraulic transmission teaching can help students understand and master many theories and application knowledge, like working principle of hydraulic components, system structure, components layout, pipeline connection mode, and basic circuits design methods, which will lay a good foundation for the engineering application.