Research on pump-controlling active constant proportional flow-divided cooling system of articulated dump truck

In order to improve the radiating efficiency of the articulated dump truck's wet multiple brakes,the paper puts forward the idea of pump-controlling active constant proportional flow-divided cooling hydraulic system.Basing on the idea,the paper analyzes the flow requirement of cooling object and properties of cooling actuator,designs cooler and active constant proportional flow-divided assembly,establishes pump-controlling active constant proportional flow-divided cooling hydraulic system.In the layout,achieving compact and integrated arrangement of component.In the flow distribution,considering continuous adjustable safe accurate flow division.In the model of control,establishing the pump-controlling model of pressure control type based on the temperature feedback of the cooling object,achieving temperature control of wet multiple braking system.Finally,through the prototype experiment was made,the results show that the coolant tempertures of the wet multiple braking system are less than 100 degree during continuous braking condition and meet the needs of continuous braking.