A Gear Micropump without Bearings Production

Abstract

Progress in the field of microelectronics and micromechanics has created new opportunities for the development of fluid power microsystems and microhydraulics. Miniaturization of hydraulic elements allows replacing the classical hydraulics with microhydraulics, where due to size or weight the former cannot be applied. Gear pumps are common use due to their reliability, resistance to working medium impurities, high efficiency, small size in comparison with other pumps and simple and compact design. Therefore micropumps often associate with a gear pump type. A micropump entails microbearings production. This requirement leads to cost increasing due to requirements to high accuracy of manufacturing. The paper focuses on a method for micropumps production without bearings. The idea based on application of materials with satisfactory friction coefficient in pairs. Friction pairs analysis made from different polymer and composite materials was carried out. As a result a gear micropump was designed and produced.

Internal Leakages in a Water Hydraulic Pump with Gears From Plastic

“…There are many works on the use of the positive features of polymers in hydraulic systems, e.g. lowering the friction coefficient in bearings [3], reducing the production costs of complex elements such as gerotor gears, [4], creating new solutions valve bodies [5], the use of plastic properties in research on design solutions of gears in pumps [6] and gears [7].…”

Numerical Study of Pulsation Productivity of a Low-Flow Gear Pump

“…работе при объёмном КПД не ниже 0,5 (при n=2500 об/мин), выходном давлении до 1,3 МПа (при кинематической вязкости среды 46 мм 2 /с (для +40°С))[9][10][11].CAD-модель стендовой системы (в составе которой исследовался насоспрототип (1)) представлена на рисунке 2. Система имеет традиционный нагрузочный дроссель игольчатого типа (7) и приводную систему с частотным преобразователем скорости вращения вала(8).1 -шестеренчатый насосный агрегат; 2 -приводной электродвигатель; 3 -тройники; 4 -станина; 5 -вакуумметр; 6 -манометр; 7 -дроссель; 8 -частотный преобразователь; 9 -пьезометрический датчик давления; 10 -расходный бак; 11 -мерный бак; Рисунок 2.…”