PROCEDURE DETERMINING MAXIMUM LEVEL OF NOISE AT POSITION OF OPERATOR OF WHEELED TRACTION MACHINE Russian patent published in 2000 - IPC

FIELD: transport, agricultural, road-building and public service machinery, evaluation of efficiency of sound-proofing qualities of cabs. SUBSTANCE: in process of motion of traction machine linked up with dynamometric trolley there is created on trolley braking force corresponding to maximum traction power of traction machine. Braking force is determined by dependence T_Nmax= (0,58...0,80)•G_k•v, where T_Nmax is braking force of dynamometric trolley; G_k is vertical load on axle of driving wheel of traction machine; ϕ is grip factor of wheel of traction machine to bearing surface. Noise measuring equipment measures level of noise at position of operator of traction machine. EFFECT: shortened time and decreased labor input for test of machine in order to determine and evaluate maximum level of noise at operator's position in wheeled traction machine. 2 dwg