SU787690A1

SU787690A1 - Twin-sided impeller of centrifugal turbomachine

Info

Publication number: SU787690A1
Application number: SU752101740A
Authority: SU
Inventors: Игорь Константинович Попов
Original assignee: Предприятие П/Я В-8721
Priority date: 1975-01-31
Filing date: 1975-01-31
Publication date: 1980-12-15

Description

Изобретение относится к энергетическому машиностроению и может найти широкое применение в рабочих колесах центробежных турбомашин. ₍ The invention relates to power engineering and can be widely used in the impellers of centrifugal turbomachines. ₍

Известно двухстороннее рабочее колесо центробежной турбомашины, содержащее лопатки, расположенные между полой ступицей и покрывными дисками (1). _f A double-sided impeller of a centrifugal turbomachine is known, containing blades located between the hollow hub and cover discs (1). _f

Недостатком такой конструкции рабочего колеса является его малая' производительность.The disadvantage of this impeller design is its low productivity.

Цель изобретения - повьнпение производительности.The purpose of the invention is an increase in productivity.

Указанная цель достигается тем, ’ что в лопатках и дисках выполнены сквозные каналы, сообщенные с полостью ступицы, а в периферийной части последней сквозные отверстия.This goal is achieved by the fact that through the channels and blades are made through channels communicated with the cavity of the hub, and in the peripheral part of the latter through holes.

На чертеже схематично изображено ’ двухстороннее рабочее колесо.The drawing schematically shows a ’double-sided impeller.

Рабочее колесо содержит лопатки 1, расположенные между долой ступицей 2 и покрывными дисками 3. В лопатках _ 1 и дисках 3 выполнены сквозные каналы 4, сообщенные с полостью 5 ступицы 2, а в периферийной части ступицы 2 выполнены сквозные отверстия 6.The impeller contains blades 1 located between the downstream hub 2 and the cover discs 3. In the blades _ 1 and disks 3, through channels 4 are made, communicated with the cavity 5 of the hub 2, and through holes 6 are made in the peripheral part of the hub 2.

При работе колеса часть потока через каналы 4 попадает в полость 5 ступицы 2 и через отверстия 6 выбрасывается в 'межлопаточное пространство обеспечивая эжекцию основного потока, что приводит к выравниванию скоростей потока и увеличению производительности.When the wheel is working, part of the flow through the channels 4 enters the cavity 5 of the hub 2 and is thrown through the openings 6 into the interscapular space providing ejection of the main flow, which leads to equalization of flow rates and an increase in productivity.

Использование изобретения в качестве насоса позволит улучшить его противокавитационные свойства.Using the invention as a pump will improve its anti-cavitation properties.

Claims

The invention relates to power engineering and can be widely used in impellers of centrifugal turbomachines. A two-sided impeller of a centrifugal turbomachine is known, which contains blades located between the field hub and surface disks 1. The disadvantage of this design of the impeller is its low productivity. The purpose of the invention is to improve production. This goal is achieved by the fact that in the blades and discs are made through channels, communicated with the cavity of the hub, and in the peripheral part of the latter through holes. The drawing schematically shows a two-sided impeller. The impeller contains blades 1 located between down with the hub 2 and covering disks 3. In the loops 1X and disks 3 there are made through channels 4, communicated with the cavity 5 of the hubs 2, and through holes 6 in the peripheral part of the hub 2 through the channels 4 enters the cavity 5 of the hub 2 and through the holes 6 is ejected into the interscapular space, ensuring the ejection of the main flow, which leads to equalization of the flow rates and an increase in productivity. The use of the invention as a pump will improve its anti-cavitation properties. DETAILED DESCRIPTION OF THE INVENTION A two-sided impeller of a centrifugal turbomachine, comprising blades located between the hollow hub and cover disks, is due to the fact that, in order to increase productivity, the through channels connected to the hub cavity are made through the blades holes. Sources of information taken into account in the examination 1. Lomakin A.A. Centrifugal and axial pumps. M., Mgii nostroenie, 1966, p. 209.