KARNAUKHOV HYDRAULIC TACHOMETER MECHANISM

The tachometer is a centrifugal pump for which the magnitude of the delivery head, measured by the height of the column of liquid in a glass tube, is directly proportional to the speed of spindle 1. Mounted on this spindle, which is driven by the shaft whose speed is to be measured, is rotor 2 with radial holes a. As the rotor rotates, the liquid is thrown outward from the centre to the periphery …