UA48888U - Centrifugal multi-stage pump - Google Patents

Abstract

A centrifugal multi-stage pump has outer body with inlet and discharge manifolds that is fixed by pins with pressure head in vertical jointing plane, inner body that includes sections with guide apparatuses, impellers installed on the shaft that rests on ring lubricated slide bearings, end gaskets and hydraulic balancing device. Upstream of the first impeller a superposed wheel is installed, ring lubricated slide bearings are provided with scraper device, pins that fix outer body to the pressure head are arranged with long end section needed for tightening with hydraulic tong unit.

Description

Znergoatomizdat, 2003 - P.197). This design of the ring lubrication of sliding bearings, priza-pump is chosen as the closest analogue for the object designed to remove the layer of lubricant from the external one. the surfaces of the lubrication supply ring and supply

The experience of operating these pumps in the operating bearing clearance systems improves the safety of the reactor compartment of the nuclear power plant shows their lubrication conditions, increases the bearing capacity of the non-conformity with the required indicators of high sliding bearings, which guarantees an increase in the degree of reliability for the following reasons: the effectiveness of operation. - in the case of the need for the pumps to work properly. The performance of the pins that fasten the external horseshoe values of the allowable cavitation valve with the pressure cap, with the presence of an extended belt, high cavitation qualities are not ensured; of the end part, makes it possible to use - in the presence of mechanical impurities in the environment - the technology, which consists in tightening the studs of pumped seals, is not satisfied with the height of their extraction with the help of a hydraulic wrench, which can ensure the reliability and durability of the work of the end seals is specially developed and included in a set of seals; delivery of the pump. This has a favorable effect on - the existing system of lubrication of the bearings of each pin and the joint as a whole, the exclusion causes the need to increase the load-bearing skew during tightening. Another advantage of the bearings by improving the running conditions is the high accuracy of measurements of the elongation of the lubrication pins; before and after extraction. In this way, a large area of the surface of the housing separation, high-quality and reliable sealing of the joint by means of an even, which requires significant tightening efforts, is ensured. measured and controlled effort on all pins

The basis of a useful model is the creation of centrifugal multi-stage work of pumps, which reduces the labor intensity, increases the quality of repair work and contributes to the improvement of reliable elements and the new execution of existing capacities. . of structural elements, are provided to increase- Thus, the use of the totality of all existing cavitation qualities of the pump, the possibility of totic features ensures the technical result that the operation of the pump in a wide range of supply (0.2- consists in increasing the reliability and durability 1.2)Onom ( Onom - the supply is nominal), improvement of the pump. conditions of lubrication and increasing the bearing capacity. The useful model that is claimed explains sliding bearings, high-quality and fast tightening with drawings that show: a housing fastening pin with a pressure cover, in Fig. 1 - a vented multistage pump, as a result of which an increase in the reliability of the longitudinal cut; and durability of the pump. Fig. 2 - ring lubrication system of bearings

The task is achieved by the fact that there is no sliding, type A; Fig. 3 - an external multistage pump, an external housing with an inlet and pressure pipe - installation diagram. cams, fixed with pins with a pressure cap. Centrifugal multistage pump contains in the vertical plane of the disconnection, an internal housing 1 (fig. 1) with inlet and pressure nozzles, a sectional type housing with guide devices and fixed with pins 2, which have elongated impellers installed on the shaft , that the end part, necessary for tightening the hydro- rests on sliding bearings with an annular beam, with a pressure cover Z in a vertical plane-lubrication, end seals of the shaft of the end rail of the disconnection. The inner body includes sections of the type, hydropia, according to the utility model, 4 with guide devices 5, the working wheels are introduced: b, mounted on the shaft 7, which rests on - the pre-engaged wheel in front of the first robo- sliding bearings 8 with a ring system than the wheel ; lubrication In front of the first working wheel 6 - a scraper device in the annular system, a pre-engaged wheel 9 is installed. As a lubrication of sliding bearings; of the end seal of the shaft 7, the end-pins that fasten the outer case and the half-seal 10 are used. For balancing the hydrodynamos cover, with the elongated end part, the axial forces serve as a hydraulic heel 11. In the system, a hydraulic wrench is required for gripping. ring lubrication of sliding bearing 8 is

It is possible to install a hydrocyclone scraper device 12 (Fig. 2), designed to clean the pumped liquid, when the lubricant layer is removed from the oil supply kiltan, which takes the liquid from the sinus and feeds it into the working bearing gap. of the first impeller, cleaning and feeding it to the pump is additionally equipped with an external end seal chamber, and this contributes to the increase in the hydrocyclone cleaning system 13 (Fig. 3) of the fluid wear resistance of the friction pair of end seals pumped into the chamber the end face of the friction wheels, which means an increase in their seals 10. reliability and durability of the unit. The pump works like this. When rotating the

Installation of the pre-activated wheel in front of the wheel 7 from the electric motor, the liquid pumped by the first impeller ensures operability through the inlet pipe, the pre-activated wheel 9, the pumps at the required low values are allowed to enter the vanes of the impeller 6 of my first cavitation reserve, cavitation-free operation of the stage, passes on all stages of the pump and the pump in a wide range of supply (0.2-1.2) Ohm. flows from the pressure nozzle under pressure, creating

Application of a scraper device in a system driven by working wheels 6.

According to the claimed useful model, the pumps tested in the conditions, tat. close to the operating conditions that have been confirmed

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Ministry of Education and Science of Ukraine

State Department of Intellectual Property, str. Urytskogo, 45, Kyiv, MSP, 03680, Ukraine

SE "Ukrainian Institute of Industrial Property", str. Glazunova, 1, Kyiv - 42, 01601