The coffee machine water pump motor is the core component of the coffee machine. Two types of pump motors are commonly used: vibration pumps and vane pumps (also known as rotary pumps). Vibration pumps are typically used in home coffee machines, while rotary pump motors are more commonly found in office and commercial coffee machines.

As the name suggests, a coffee machine rotary pump is a pump that delivers liquid through rotational motion. In coffee machines, its primary function is to draw water from the reservoir and deliver it to the coffee puck at a stable pressure, thereby extracting the essence of the coffee. The rotary pump is a common pressure-regulating device that helps the coffee machine control pressure levels. The pump mechanism primarily consists of a pulley and a hydraulic unit. As the pulley rotates, the hydraulic system adjusts the pump pressure to reach the desired control pressure.

A coffee machine rotary pump typically comprises a shaft, a rotor, a stator, and seals. When the motor drives the rotor to rotate, the cavity volume between the rotor and the stator changes periodically, generating both vacuum and pressure. The pressure regulation principle of the rotary pump relies on the rotation of the pump to adjust pressure. Specifically, when the coffee machine starts up, the rotary pump begins to operate. The rotation of the pulley causes a threaded rod to move, which in turn regulates the pressure level.