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An external gear pump uses two external gears (Figure 1, below) that displace non-lubricating fluids (gears are oil lubricated). The mechanism is usually driven by one of the toothed gears, which in turn drives the other. Three factors are involved in the regulation of flow: volume of cavity between the teeth, speed of gears, and the amount of fluid that slips back to the inlet (tolerance dependant) via the mechanism. There are three main types of external gears: spur, helical and herringbone. helical and herringbone deliver more flow at higher pressure while also being quieter, but may require a greater inlet pressure than spur (EPW, 2012)
BWCB insulation gear pump motor high temperature reasons and countermeasures analysis 1, cause analysis (1) motor power, large operating current, large heat. (2) The fan speed is low, the wind pressure is small, and the air volume is small. (3) The...
Gear oil pumps are mainly used in the transfer, oil pressurization, fuel injection, etc. of oil media in chemical, petroleum, mining, metallurgy, power station and other industries, as well as in the thin oil circulation of large machinery and...
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