DefinePK

Abstract

One of the ways to increase the efficiency of the transmission system of an agricultural tractor traction concept is to introduce a clutch coupling with a pneumatic-hydraulic elastic element into the transmission. Installation of an elastic element in the form of a pneumo-hydraulic accumulator (PHA) in the clutch is associated with the need to implement a calculated loading regime for any technological operation on the same engine operating mode, as well as the need to mitigate impact phenomena. In this case, it should be possible to change its stiffness depending on the technological operation being performed. This can be done by justifying the working area of the elastic characteristics of the PHA under operating conditions. It is determined by the possible range of variation (oscillation) of the tractor pulling force. It is within its limits that the elastic properties of the shaft line must be manifested, which ensure the stabilization of the loading regime. Numerous studies machine-tractor aggregates show that the maximum deviations of the pulling force P from its average value are under extreme conditions up to 35%.