In a vane-type pump, a slotted rotor splined to a drive shaft rotates
between closely fitted side plates that are inside of an elliptical- or
circular-shaped ring. Polished, hardened vanes slide in and out of the rotor
slots and follow the ring contour by centrifugal force. Pumping chambers are
formed between succeeding vanes, carrying oil from the inlet to the outlet. A
partial vacuum is created at the inlet as the space between vanes increases.
The oil is squeezed out at the outlet as the pumping chamber’s size decreases.
Because the normal wear points in a vane pump are the vane tips and a ring’s
surface, the vanes and ring are specially hardened and ground. A vane pump is
the only design that has automatic wear compensation built in. As wear occurs,
the vanes simply slide farther out of the rotor slots and continue to follow a
ring’s contour. Thus efficiency remains high throughout the life of the pump.
Transport is the movement of materials from one location to another, this is a waste as it adds zero value to the product. Why would your customer (or you for that matter) want to pay for an operation that adds no value? Transport adds no value to the product, you as a business are paying people to move material from one location to another, a process that only costs you money and makes nothing for you. The waste of Transport can be a very high cost to your business, you need people to operate it and equipment such as trucks or fork trucks to undertake this expensive movement of materials. Waste of transport is a consequence of excessively long, intersecting transport paths, temporary storage, load and unload, transport of pallets hither and thither. Waste of transport is also caused by too detailed process breakdown and exaggerated division of work, due to imprecisely defined intermediate warehouses and due to production in large series. Waste of tra...
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