Gear pump works, operation and maintenance

Working volume change and move the gear pump by a pump cylinder and between the ring gear is formed so as to transport liquid or pressurized rotary pump.

External gear meshing double pump structure. A pair of gears meshing with each other and the pump cylinder to the suction chamber and discharge chamber separated. When the gear, the gear teeth are disengaged from each side of the suction chamber at the interdental volume gradually increases, the pressure decreases, the liquid enters the teeth in the differential pressure. With the rotation of gear teeth of one liquid is brought to the discharge chamber. Then interdental volume of the discharge chamber side of the gear teeth is gradually reduced, and the liquid is discharged. Gear pump for conveying solid particles, non-corrosive, lubricating viscosity range of large liquid. Pump flow can be up to 300 m3 / h, pressure up to 3 × 107 Pa. It is usually used as a hydraulic pump and transport all kinds of oil. Gear pump structure is simple and compact, easy to manufacture, easy to maintain, self-priming ability, but the flow, pressure pulsation is large and noisy. Gear pumps must be equipped with a safety valve to prevent some reason such as a discharge tube blockage so that the pump discharge pressure exceeds the allowable value of damage to the pump or prime mover.

working principle:

The gear pump is a positive displacement pump, the two gears, pump and front cover consisting of two enclosed space, when the gear, the gear disengaged side of the volume of space from small to large, forming a vacuum, liquid inhalation, gear the volume of space from small engaging side drastic change, and the liquid to squeeze into the pipeline. The suction chamber and discharge chamber is by wire meshing gears to separate the two. Gear pump outlet pressure depends entirely on the size of the pump source resistance.