Inestigations Into The Low-speed Driving System Of Pavement Shot Blasting Maintenance Vehicle

The shot-blasting treatment of the road and bridge can improve the bond strength between the asphalt or the coating and the surface of the road and bridge. It can also play an important role in the increasing of the friction for the cement concrete pavement and the asphalt concrete pavement. As a new type of treatment for the pavement, the shot-blasting treatment is at the stage in domestic. The improvement of driving performance at low speed is an important way to increase the construction quality. This improvement can simultaneously expand the shot-blasting treatment in pavement maintenance.Based on the requirement of the design for shot-blasting vehicles and the research of drive plans at low speed for some common vehicles, the plan of hydrostatic-mechanical transmission system is finally defined. Calculating and checking of the parameters of engine and hydraulic main components are completed. The simulation for the hydro-mechanical transmission system is finished. In order to acquire the steady speed and the high efficiency of transmission, the recommending speed for each gear are identified. Aiming to avoiding the influence of construction quality in the process of starting the car, the device of vehicle begin to work after the starting of driving system at least for 2 seconds. Owing to guarantee the safety of braking, the auto control system of vehicle stops the device at the beginning of the brake. This implementation provides the evidence for the safe design of control system. The result of simulation shows the reasonability of matching and the good working performance and safety in the usual speed range of vehicle.