Orchard medicament spraying machine with manual air blower rotating speed adjustment device

The invention discloses an orchard medicament spraying machine with a manual air blower rotating speed adjustment device. The orchard medicament spraying machine comprises a medicament box arranged on a tractor; a speed sensor is arranged on the tractor; along the traveling direction of the tractor, a left air box and a right air box which are independent of each other and are symmetrical with each other about the traveling direction of the tractor are arranged on the back part of the medicament box; a left centrifugal fan and a spray nozzle group connected to the outlet of the medicament box are arranged in the left air box; a left rotating speed sensor is arranged on the left centrifugal fan; the left centrifugal fan is connected with a left speed-adjustment motor; the speed adjustment of the left centrifugal fan is realized by the left speed-adjustment motor; the structure of the right air box is the same as that of the left air box; a right centrifugal fan is arranged in the right air box; a right rotating speed sensor is arranged on a right centrifugal fan; the right centrifugal fan is connected with a right speed-adjusting motor; the speed adjustment of the right centrifugal fan is realized by the right speed-adjustment motor; a generator is connected with the left speed-adjustment motor and the right speed-adjustment motor for supplying power to the left speed-adjustment motor and the right speed-adjustment motor; the left speed-adjustment motor and the right speed-adjustment motor are controlled by manual adjustment by the controller on the tractor according to the received speed signals and fan rotating speed signals; and the independent adjustment and control of the air amount of the left air box and the right air box are realized.