Gear pump is one of the most widely used rotor pumps in the coating industry. According to different gear meshing modes, gear pumps can be divided into external gear pumps and internal gear pumps. External gear pumps are widely used, and generally referred to as gear pumps.
The working principle of the gear pump: 1. The gear pump delivers liquid by relying on the volume change of the working space caused by the meshing process of the gears.
Working principle II of gear pump: the working space is composed of the pump body, pump cover and the grooves between the teeth of the gear, and the meshing gear teeth divide this space into the suction chamber and the discharge chamber. When a pair of gears rotate, the gear teeth located in the suction chamber gradually withdraw from engagement, so that the volume of the suction chamber gradually increases and the pressure decreases. The liquid enters the suction chamber along the suction pipe until it fills the entire tooth space.
Working principle of gear pump 3. With the rotation of the gear, the liquid entering the teeth is brought to the discharge chamber. At this time, the gear teeth enter the mesh, occupying the volume between the teeth, so that the volume of the discharge chamber becomes smaller, and the liquid is forcibly discharged. When the gear pump is running, the liquid sucked in is full of the slots.
Working principle of gear pump 4. As the gear rotates, the liquid is transported to the high-pressure area along the shell wall. Because the two gears mesh with each other, the liquid in the gear slot at the meshing point is squeezed out and discharged into the outlet pipeline. At this time, a negative pressure area is formed in the enclosed space, and the liquid at the pump inlet is pressed to the pump suction under the action of atmospheric pressure.
Working principle of gear pump V. The discharge pressure of gear pump is high, the volume is small, and the flow is not large. In paint production, it is generally used to transport solvent, oil, paint and paint slurry.