Keiki TOKIMEC hydraulic variable displacement piston pumps F11-SQP21-21-11-86DC2-18 Pump Type Piston Pump

Shaft torque limitations of double pumps are shown in the table. Please ensure the total of the maximum load of the two pumps do not exceed the torque limits shown in the table. Please calculate shaft torque from the operating speed and shaft input. N: operating speed (min-1) L: shaft input sum (kW) Shaft torque: T = (60 × 1000/2πN) × L = (9554/N) × L (N·m) (Example) SQP43-60-38, operating speed 1800 min-1, first pump 14MPa, second pump 17.5MPa under max. load, First pump shaft input: from table on page B1-5, SQP4-60 shaft input is 84.8 kW Second pump shaft input: from table on page B1-5, SQP3-38 shaft input is 66.7 kW Shaft input sum: L=84.6 + 66.7 = 151.5 (kW) Shaft input sum substituted for torque in the table, Shaft input torque: T = 9554 × 151.5/1800 = 804.1 (N·m) Thus, the shaft torque is below the limitation of 820 N·m for SQP43 Please confirm shaft torque using this procedure.