SU994802A1

SU994802A1 - Centrifugal pump

Info

Publication number: SU994802A1
Application number: SU813345620A
Authority: SU
Inventors: Станислав Леонидович Александров; Александр Алексеевич Быковский; Александр Иванович Иванов; Анатолий Иванович Белоусов; Дмитрий Евгеньевич Чегодаев
Original assignee: Предприятие П/Я М-5841
Priority date: 1981-10-12
Filing date: 1981-10-12
Publication date: 1983-02-07

Description

(54) ЦЕНТРОБЕЖНЫЙ НАСОС(54) CENTRIFUGAL PUMP

1one

Изобретение относитс к гидромашиностроению и может быть использовано в центробежных насосах.The invention relates to hydraulic engineering and can be used in centrifugal pumps.

Известен центробежный насос, содержащий корпус и установленное в нем на валу рабочее колесо, с наружной стороны ведущего диска которого расположен импеллер с подпружиненными пластинами, установленными с возможностью радиального перемещени и опирающимис на участок вала с переменным диаметром, причем лопатки импеллера расположены во втулке, установленной на подшипнике в корпусе насоса и св занной с валом, в котором регулирование неуравновешенных осевых сил осуществл етс при осевом перемещении ротора за счет изменени наружного диаметра пластин импеллера 1.A centrifugal pump is known, comprising a housing and an impeller mounted thereon on the shaft, on the outer side of the drive disk of which an impeller is located with spring-loaded plates mounted for radial movement and supported on a variable-diameter shaft section, the impeller blades located in a sleeve mounted on bearing in the pump casing and connected to the shaft, in which the unbalanced axial forces are controlled by axial movement of the rotor by changing the outer Impeller Diameter plates 1.

Известен также центробежный насос, содержащий корпус и размещенное в нем на залу рабочее колесо, с наружной стороны ведущего диска которого установлен с возможностью перемещени импеллер с лопатками , закрепленными на втулке, снабженной кольцевым выступом и св занной с корпусом посредством подшипника 2.A centrifugal pump is also known, comprising a housing and an impeller placed in it on the hall, on the outside of the drive disk of which the impeller with blades mounted on a sleeve fitted with an annular projection and connected to the housing by means of a bearing 2 is mounted.

Недостатком известных конструкций вл етс узкий диапазон регулировани неуравновещенных осевых сил в св зи с ограниченным осевым перемещением ротора и соотнощением значений осевых перемещенийA disadvantage of the known constructions is the narrow control range of the unbalanced axial forces due to the limited axial movement of the rotor and the ratio of the axial displacements.

5 ротора с величиной радиального перемещени пластин импеллера, определ емых крутизной , образующей участок вала с переменным диаметром, которые обеспечивают только уменьшение гидростатической жесткости5 rotors with the magnitude of the radial displacement of the impeller plates, defined by the steepness, forming a shaft section with a variable diameter, which provide only a reduction in hydrostatic rigidity

0 автомата разгрузки и ограничены веро тностью заклинивани ротора.0 of the automatic unloading machine and limited by the likelihood of rotor jamming.

Цель изобретени - расширение диапазона регулировани неуравновешенных осевых сил путем уменьшени осевых перемещений колеса и повыщени надежности.The purpose of the invention is to expand the range of adjustment of unbalanced axial forces by reducing the axial movements of the wheel and increasing reliability.

Claims

15 This goal is achieved by the fact that in a centrifugal pump comprising a housing and an impeller placed on it on the shaft, the impeller with blades mounted on a sleeve fitted with an annular projection and connected to the housing bearing, the impeller is provided with bellows-type chambers filled with a viscous liquid and connected through channels made in the annular protrusion of the sleeve, and from one end of the chamber are provided with disks They are connected to the impellor blades and the shaft respectively, and are rigidly connected to the hub at the other end of the chamber. FIG. 1 shows a centrifugal pump with an impeller automatic unloading machine that regulates an unbalanced axial force by changing the width of the impeller blades, a longitudinal section; in fig. 2 - centrifugal pump with an impeller automatic unloading device, which regulates unbalanced axial force by changing the height of the impeller blades, a longitudinal section. The centrifugal pump includes a housing 1 and an impeller 3 placed on the shaft 2, on the outside of the drive plate 4 of which an impeller 5 with blades 6 mounted on a sleeve 7 equipped with an annular projection b and connected to the housing 1 is movable 9, and the impeller 3 is provided with bellows-type cameras 10 filled with a viscous liquid and connected via channels 11 formed in an annular protrusion 8 of the sleeve 7, with disks 12 and 13 rigidly connected at one end of the chamber 10 E, respectively, with the impeller blades 6 bis shaft 2 and at the other end of the chamber 10 is rigidly connected to the sleeve 7. The device operates as follows. When the pump is operated, the blades 6 of the impeller 5 move, decreasing or increasing the amount of their protruding part, compressing or expanding the chamber 10 connected to the shaft, and viscous fluid flows through the channels AND, moving the blades 6 of the impeller 5. The optimum hydrostatic rigidity and the impeller's damping capacity, determined by the ratio of rotor movements and changes in the width or outer diameter of the impeller blades caused by these movements, is provided by the geometrical parameters of bellows ep connecting the channels of each other, as well as the elastic properties of the material of bellows chambers and physical properties of a viscous liquid. The proposed implementation of a centrifugal pump will improve its reliability and operability by establishing the optimal hydrostatic rigidity of the automatic discharge unit, reducing the axial displacements of the rotor, and also expand the possibilities of using the impeller automatic unloading unit to balance the significant axial forces acting on the rotor during starting, cavitation and off-design operating modes pumps. Claims of the invention: A centrifugal pump comprising a housing and an impeller placed on the shaft, on the outside of the drive disk of which the impeller is mounted for moving with blades mounted on a sleeve provided with an annular protrusion and connected to the housing by means of a liner, characterized in that in order to expand the range of adjustment of unbalanced axial forces by reducing the axial movements of the wheel and increasing reliability, the impeller is equipped with bellows-type chambers filled in fluid and connected through channels made in the annular protrusion of the sleeve, with one end of the chamber provided with disks rigidly connected respectively to the impeller blades and the shaft, and the other end of the chamber rigidly connected with the sleeve., Sources of information taken into account Examination 1. USSR author's certificate number 775387, cl. F 04 D 29/04, 1980.

2. USSR author's certificate number 681217, cl. F 04 D 1/00, 1978.