Internal external gear pump design, decided to pump function: transportation, small differential pressure, the outlet pressure is not high. It can also convey high viscosity fluid at high speed. The external external gear pump is divided into two kinds: one kind is high speed, for example: hydraulic external gear pump at a low speed, for example: gear measurement electric petrol pump gear metering pump, the meshing used for metering, high pressure, the maximum output of 175KG, or even higher. The transfer of high viscosity fluid. Internal gear is a gear and he have the same modulus, tooth inner gear ring thickness consistent with operation. The meshing is two or more than two of the same modulus, tooth ordinary gear running thick consistent (with straight tooth, helical, herringbone gear etc.). External gear pump drive gear and the driven gear type pump gear steering instead, simple structure, light weight, convenient maintenance, long service life; internal external gear pump drive gear and the driven gear to the same, more complex structure, processing is difficult, small flow pulsation.
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