ASPECTS CONCERNING DETERMINATION OF FUNCTIONAL PARAMETERES OF TRANSMISSION WHICH EQUIPED UNIVERSAL SEED DRILLS PUBLISHEDFlorin Loghin
This paper presents some aspects concerning experimental determination of kinematic quantities values which characterize the functioning of gearbox with cam-balance-lever mechanism, view of representation and comparison of motion laws obtained by measurements with those outlined in the process simulation using the virtual prototype method. To determine the functional parameters of transmission with intermittent motion was used an experimental installation, consists of the following modules: a hydrostatic drive system with continuously variable flow and a sewing department. Broadcast sowing transmission was designed to achieve two drive systems: by means of a mechanical transmission with intermittent motion which includes a gearbox with cam-balance-lever mechanisms, by means of a mechanical transmission with continuous rotation, which includes a Northon type gearbox. The technical system was composed of the following components: device for measuring by means ofelectrical impulses of speed, angular displacement transducer, card acquisition, signal amplifier and laptop. For perceive and measure the kinematic quantities was used a complex technical system of experimental investigation, which allowed the acquisition, processing and analysis of characteristic parameters and kinematic quantities. The functional parameters of the transmission section of sowing which resulted in the experimental research are: speed of input shaft in the gearbox with intermittent function, angular space crossed by input shaft, the angular space crossed by shaft-drive of dosing devices, transmission ratio made by the gearbox with cam-balance lever mechanisms, the driver-training time of dosing devices. The unevenness of output shaft motion from the gearboxwith cam-balance lever mechanisms is a parameter which characterizing the kinematic regime of these gearboxes.In experimental researches, it was revealed by determining the duration of stationary phase of output shaft in an operating cycle of the balance lever.
seed drill; transmission; kinematics parameters