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[8] [9] There are four 18.5 kW rotary lobe pumps manufactured by Börger. Each pump has a capacity of 40 m 3 per hour at a discharge head of 70 m. Normally only two pumps are in operation but if the ingress of water increases all four pumps automatically operate. [8]
Production cost Efficiency Output ... Gear and lobe pump: continuous 10m-20m medium ... Semi-rotary pump cyclic 5m-10m low-medium
A lobe pump, or rotary lobe pump, is a type of positive displacement pump. It is similar to a gear pump except the lobes are designed to almost meet, rather than touch and turn each other. An early example of a lobe pump is the Roots Blower , patented in 1860 [ 1 ] to blow combustion air to melt iron in blast furnaces, but now more commonly ...
Because rotary lobe pumps need to maintain a clearance between the lobes, a single stage Roots blower can pump gas across only a limited pressure differential. If the pump is used beyond its specification, the compression of the gas generates enough heat so that the lobes expand to the point that they jam, damaging the pump.
Stothert & Pitt commenced rotary lobe pump manufacture with a licence in 1919. Molasses and other viscous liquids were handled in heated pumps. Up until 1937, installed lobe pumps were still in use unloading molasses tank ships.
An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...
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