The Optimization of Design and Energy Consumption for Helical Gear Pumps by Benchmarking

Abstract

The various types of helical gear pumps can be produced to transfer the gasoline, diesel, chemicals, and oil. Helical gear pumps are used by motor power in fuel selling and transfer points, and by gear shafts at mobile transfer trucks. These pumps are classified in three main groups as internal gear, pallet, and helical pumps. The common feature of them is sucking the liquid from the container placed under ground level and transferring it to the high levels. The lower flow rates, noisy working, and the quick corrosion of gear when the pump is running closing outlet valve are the disadvantages of these pumps produced in our country. The aim of this study is to design a new generation of helical gear pump which will eliminate or at least decrease these disadvantages. It is expected to minimize energy consumption, and to protect the corrosion of gears coming from the high pressure at this new design. The dimensions of this pump will be appropriated to the chassis of the truck and at minimum weight. The various types of helical gear pumps,  both domestic production and imported, are evaluated in a study performed with the R amp;D department of the petroleum industrialist firm IPT (Ismet Pump Technology) on their energy consumptions, flow rates, dimensions, weights, and maximum pressure criteria. The reasons of the noiseless working and the high flow rates are explored at the end of this benchmarking analysis. Through the benchmarking, by-pass system, liquid clearance between the gears, and the faults at the inlet and outlet design of the domestic products are identified and a new design is proposed. In the new designed pump the number of teeth is decreased and the cavitation of the inlet and outlet is minimized. Besides these the transfer capacity of the pump is increased from 400 l/min to 600 l/min. The energy requirement for 1 liter of liquid is compared with the other products to measure its energy efficiency. The result is also positive at this point of view. Then, this new design is protected by patent registration