Justification of rational repair technology of centrifugal pump 2NGK4 × 1

Centrifugal oil pumps - centrifugal pumps designed for pumping (processing), oil products, liquefied hydrocarbons and liquids similar in physical and chemical properties to oil and oil products. Centrifugal oil pumps can be of different design, with different oil pumping control systems. Centrifugal oil pumps differ from other centrifugal pumps, primarily in special operating conditions. In oil refining, the centrifugal oil pump assemblies and assemblies are not only affected by complex hydrocarbons, but also by factors such as a wide range of temperatures and different pressures. Another feature of oil and oil products processing is the viscosity of the pumped medium, centrifugal oil pumps should provide oil pumping with a viscosity of up to 2000 cSt. Centrifugal oil pumps are also used in various climatic conditions from low temperatures of the North Sea to high temperatures in the Arab Emirates and in the deserts of the United States, so they are manufactured in various climatic versions. When pumping oil, processing oil and lifting hydrocarbons from the depth (oil wells), it is necessary to provide the oil pump with a sufficient level of power. The type of energy used by the equipment can have a significant impact on the performance of the well. Under different conditions of use for oil pumps, it is advisable to select drives of various types: mechanical, electric, hydraulic, pneumatic, thermal. The most convenient for an oil pump is an electric drive, which in the presence of power supply provides the largest range of characteristics of pumping equipment for pumping oil. But in the absence of electricity or limitations on the power of the supplied current, for example, gas turbine engines, internal combustion engines can be used, and for pneumatic drives it is possible to use the energy of high-pressure natural gas and even the energy of associated gas, which increases the profitability of the plant. Based on the above, some design features of centrifugal oil pumps can be distinguished. First of all, the design features of the hydraulic part of the pump unit, special materials taking into account the installation of the pump unit outdoors, the special design of the end seal, explosion-proof motors, which are relevant for all types of oil pumping equipment. An oil pump with a drive is installed on a single foundation plate, an end seal with a system of washing and supply of shutter fluid is installed between the shaft and the housing. Flow part parts are made of carbon, chromium or nickel-containing steel. It is customary to divide centrifugal oil pumps into three types: cantilever pumps - with an elastic clutch, a rigid clutch, without a clutch, installed horizontally and vertically mounted on legs or along a central axis with a pumped liquid temperature of up to 400 С; two-support pumps: one or two-stage, multi-stage single-hull and double-hull, one-sided and two-sided suction for pumping oil and oil products with a temperature of more than 200 С; vertical semi-submersible (suspended) pump: single-hull and double-hull, with drain through the column or separate drain, with guide vanes or spiral branch. Thus, centrifugal oil pumps are pumps that ensure the safety, reliability and energy efficiency of oil and oil products processing, pumping.