Volume type electric pump is a mechanical action on high speed rotating gear, rotary plate, the liquid and the liquid pressure extrusion force and velocity increases. Gear pump has the characteristics of simple structure, reliable work, easy to manufacture, low price and so on, so it has a wide application in aviation.
The gear pump has a pair of intermeshing gears in the interior of the shell, and the ends of the gear are sealed by the end cover. The gear is divided into an interconnected A cavity and a B cavity. There are two holes on the shell, which are connected to the A cavity and the B cavity respectively.
When the gear according to the direction of rotation, in the A cavity, because of a pair of gears disengaged, so that the cavity volume increases, the formation of partial vacuum, the oil tank under atmospheric pressure under the action of A into the cavity through the tubing and casing, sucked into the A cavity gear oil in the sealed space. Along with the rotation of the gear along the inner wall of the shell into the B cavity filled with fluid between teeth, because of tooth, the cavity volume gradually reduced, the tooth oil squeezed out, said the chamber is pressurized oil cavity. When the gear rotation, A, B two cavity constant pressure, oil absorption and oil discharge, this is the working principle of the gear pump.
In the gear pump, the suction chamber is lower than atmospheric pressure, the oil pressure of each teeth vary with position between teeth and different articles by Ningbo Zehnder pump suction chamber is close to the finishing part of the teeth, the oil pressure is low; the more close to the pressurized oil cavity part of the tooth, the oil pressure is high. So the oil pressure between each tooth is increased from the oil suction chamber to the pressurized oil chamber, and the pressure is the pressure in the high pressure chamber when the oil chamber is pressurized.
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