Narayana Rao, S., "Combined Spatter and Immersion Type Oil Cooling System for Multi Disc Wet Clutch Transmission in Tractors," SAE Technical Paper 2017-28-1976, 2017.
The utility of tractors in India has grown and is growing. Other than in agricultural area, it finds use in non-agricultural and construction/ earthmoving applications like loaders, dozers, power source, etc. The tractors that are subjected to heavy duty cycles are mostly with conventional dry type clutches. These types of dry clutch when operated in heavy application generate large amount of heat within shorter period of time on the surface of friction discs. This increase in disc surface temperature weakens the friction material property & bonding element leading to deterioration and decreasing the life of clutch. This curtails the clutch life extensively and is a big challenge to farmers and tractor users. The frequent clutch failures not only increases the operating cost, but also the servicing of clutches in the tractor fitted with heavy attachments leads to a higher downtime and service cost. To overcome this challenge, an innovative solution in the oil spatter concept has been evolved to provide active circulation of oil to the multi disc wet clutch friction discs while in engaged conditions. The system is designed in such a way that it cut-off the oil flow in to the clutch unit while clutch is disengaged. This oil spatter system evenly carries away the heat generated across friction & steel disc surface through the groove patterns in the discs. This combined spatter and immersion type oil cooling provides improved heat removal and significantly reduces the drag torque and reduces power loss. This oil spatter clutch system will provide a fit and forget trouble free clutch system to farmers with significantly higher ROI.