The
gear pump comprises a pump shell, a driving
assembly, a motor
assembly and a sealing
assembly, the pump shell is provided with a containing cavity, a liquid
inlet channel, a liquid outlet channel and a shaft hole, the liquid
inlet channel, the liquid outlet channel and the shaft hole are communicated with the containing cavity, and the driving assembly is arranged in the containing cavity and used for driving liquid to flow into the containing cavity from the liquid
inlet channel and flow out from the liquid outlet channel; the motor assembly comprises an end cover and a
motor shaft extending out of the end cover, the
motor shaft extends into the containing cavity from the shaft hole and is in transmission connection with the driving assembly, the sealing assembly comprises a sealing piece and an elastic piece, and the sealing piece is annularly arranged on the periphery of the
motor shaft, is used for blocking the shaft hole and comprises a sleeve with a sealing cavity and a clamping spring. According to the invention, the snap spring is hooped at the periphery of the sleeve and is connected to the motor assembly to provide radial elastic support for the sealing element, so that radial amplitude generated in the working process of the motor is absorbed, and the purpose of reducing the
adverse effect of the radial amplitude on the sealing element is achieved.