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EQUIPMENT WITH HYDROSTATIC DRIVE AND HYBRID ENERGY SOURCE FOR CONSTRUCTION WORKS
Abstract
The article presents the creation of an experimental model of a hybrid vehicle intended to work both in conventional environments, in which the use of a diesel engine is permitted, and in environments with pollution restrictions (noxious emissions), in which an electric motor powered by batteries is used. At the level of the experimental model, the chassis of the drive train was made and tested, and the results were compared with those obtained by simulation with AMESim. The equipment in the NRMM (non-road mobile machinery) category have medium and high powers (of the order of tens or hundreds of kW) and, regardless of the primary energy source, they predominantly use hydrostatic drive for the work equipment. In the case of the presented hybrid vehicle, the work equipment is supplied with hydrostatic energy from a secondary pump. The machine can work in heavy environments with a lot of dust, moisture or rough terrain where the electric motors mounted in the wheel of the vehicle do not give very good results. Traction is achieved on all four wheels of the car using hydraulic wheel motors with radial pistons. This type of engine ensures a high torque at low speeds, necessary for the types of work performed. The article presents the main subassemblies of this machine, the hydraulic drive scheme, the energy sources (thermal engine and LiFePO4 type battery group), as well as the machine's control system. The final goal of the authors is the development of a work equipment for underground constructions, in partnership with an established manufacturer from Romania.
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References7
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