SU918559A1

SU918559A1 - Centrifugal pump

Info

Publication number: SU918559A1
Application number: SU802959736A
Authority: SU
Inventors: Леонид Ефимович Чепурко; Виталий Альбертович Васильев
Priority date: 1980-07-15
Filing date: 1980-07-15
Publication date: 1982-04-07

Description

(k) ЦЕНТРОБЕЖНЫЙ НАСОС(k) CENTRIFUGAL PUMP

II

Изооретение относитс к гидромашиностроению и может быть использовано в центробежных насосах.Isoretintation refers to hydraulic engineering and can be used in centrifugal pumps.

Известен центробежный насос, преимущественно высокого давлени , содержащий рабочие колеса с осноа шм и покрывным дисками, на наружных поверхност х последних из которых выполнены кольцевые бурты, и уплотнительные кольца, имеющие кольцевые выступы, образующие с буртами кольцевые зазоры, служащие трехщелевыми уплотнени мци т . A centrifugal pump, predominantly high pressure, containing impellers with base and cover disks, on the outer surfaces of the latter of which are annular shoulders, and sealing rings having annular protrusions, which form triple-gap seals with flanges, are known.

Известна конструкци характеризуетс недостаточной надежность и повышенной вибрацией при работе насоса, обусловленными прогибом ротора, в результате чего кольцевой зазор во второй щели уменьшаетс , что приводит к увеличению децентрирующих сил, повышению вибрации и снижению надежности ,The known structure is characterized by insufficient reliability and increased vibration during pump operation, due to rotor deflection, as a result of which the annular gap in the second slot decreases, which leads to an increase in de-centering forces, an increase in vibration and a decrease in reliability,

Цель изобретени повышение надежности и снижение вибрации.The purpose of the invention is improving reliability and reducing vibration.

Указанна цель достигаетс тем, что кольцевой зазор средней щели выполнен переменным, причем величина наружного радиуса кольцевого выступа уплотнительного кольца в нижней точке превышает величину этого же радиуса в верхней точке на 0,2-1.This goal is achieved by the fact that the annular gap of the middle slit is made variable, and the outer radius of the annular protrusion of the sealing ring at the lower point exceeds the magnitude of the same radius at the upper point by 0.2-1.

.На фиг. 1 изображена проточна часть центробежного насоса; на фиг.2вид А на фиг.1..In FIG. 1 shows the flow part of a centrifugal pump; in Fig.2. A in Fig.1.

toto

Центробежный насос, преимущественно ш 1сокого давлени , содержит рабочие колеса 1 с основным и покрывным The centrifugal pump, mainly w 1 sokogo pressure, contains impellers 1 with the main and top

дисками 2 и 3, на наружных поверхност х k последних из которых выпол discs 2 and 3, on the outer surfaces k of the latter of which are

Claims

15 there are no annular shoulders 5 and sealing rings 6, having annular protrusions 7, forming annular gaps 8 with the shoulders 5, serving as three-gap seals, the annular gap 8 of the middle gap being made variable and the outer radius of the annular protrusion 7 of the middle sealing gap rings 6 at the lower point B exceeds the same g, at the upper point C at a radius of .0.2-1 .. The pump works as follows / Due to the deflection of the pump rotor, the annular gaps 8 of the first and third slit increase by the amount of deflection, and as a result Athe that in the average gap radius T | the annular protrusion 7 of the sealing ring 6 in the lower SP-2 exceeds the radius ij, at the upper point C by 0.2-1, the size of the annular gap 8 of the middle slit becomes approximately equal to the values of the annular gap 8 of the extreme slits. The use of the proposed invention allows to increase the reliability and reduce the vibration when the pump is running, which leads to an increase in the overhaul life and efficiency. 91. 4 Claims of the Invention A centrifugal pump, preferably of high pressure, containing impellers with main and cover disks, on the outer surfaces of the latter of which ring shoulders are made, and sealing rings having ring projections forming ring holes with trimmings, which are three-slot seals, different By the fact that, in order to increase reliability and reduce vibration, the annular gap of the middle gap is made variable, with the outer radius of the annular protrusion of the sealing ring at the lower point exceeds the value of the same radius at the upper point by 0.2-1%. Sources of information taken into account in the examination 1. Lamakin A.A. Centrifugal and propeller pumps. ML, Mashgiz, 1950, S.Y5, fig.96.