A gear pump is a type of positive displacement pump. The positive displacement pump is a pump that changes the volume of the studio through the reciprocating motion of the rotor or slider to carry out the working fluid transfer, and the gear pump is one of them, which usually uses the meshing of two gears to carry out fluid transportation.
The gear pump consists of two gears that are engaged, and when the gear rotates, the teeth on one side of the suction chamber are disengaged from each other, and the fluid enters the suction chamber and is brought into the discharge chamber with the rotation of the teeth. In the discharge chamber, the teeth are re-engaged and the fluid is squeezed out of the pump body. This way of working makes the gear pump have a high conveying efficiency, so it has been widely used in the industrial field.
Why is a gear pump a positive displacement pump? The main feature of positive displacement pumps is that the volume of their working chamber changes periodically, allowing for the suction and discharge of fluids. In gear pumps, due to the meshing of the two gears, a closed working cavity is formed, and its volume will periodically increase and decrease with the rotation of the gear, so as to achieve the suction and discharge of fluid. Therefore, gear pumps meet the definition and characteristics of positive displacement pumps.
However, it should be noted that although gear pumps are a type of positive displacement pumps, other types of positive displacement pumps may be more suitable in some special working environments, such as occasions requiring high pressure. Therefore, when choosing the type of pump, it is necessary to choose according to the actual working environment and needs. In practical applications, gear pumps have been widely used because of their simple structure, convenient maintenance and high reliability.