The experimental evaluation of the effectiveness of the regenerative drive of the working bodies of a combine harvester

In grain self-propelled harvesters, when performing technological processes of mowing grain crops and cleaning grain, the oscillating working bodies are used. Having advantages in carrying out technological processes, they are a source of alternating load caused by the inertia forces of the masses of the elements of these organs and leading to the dynamic loading of their drives and vibration of the combine frame. One way to overcome these shortcomings is the recovery of energy in the drives of the working bodies. The authors of the article have proposed a method that, due to the use of a regenerative drive, can reduce its dynamic loading, as well as reduce the vibration of the machinery frame. Based on the proposed method, a method for balancing a single-knife cutting apparatus has been developed. For an experimental assessment of the legitimacy of the theoretical developments underlying the presented technical solution, a prototype drive of oscillating working bodies was developed and manufactured, which allows simulating the operation of traditional and regenerative cutting machine drives. The experimental studies of the prototype model confirmed the validity of the theoretical background of the developed method for balancing a single-knife cutting apparatus and allowed to deepen the theoretical and empirical knowledge in the field of regenerative drives. An analysis of the results of experimental studies of prototype samples showed that, compared with a traditional drive, a regenerative drive can reduce the load and vibration activity by more than 1,5 times. The factors affecting the efficiency of the regenerative drive of a single-knife cutting device have been established, which include: the presence of higher harmonics in the law of motion of the knife provided by the rolling washer mechanism, resonance phenomena in the drive of oscillating masses and structural elements of the header, simplification of the design of the drive of the recuperator counterweight.

self-propelled combine harvester, oscillating working bodies, regenerative drive, cutting apparatus, roling plate mechanism, experimental research, loading, vibration activity, vibration