SU928074A1

SU928074A1 - Glandless centrifugal pump

Info

Publication number: SU928074A1
Application number: SU802986597A
Authority: SU
Inventors: Леонид Бейсахович Ганзбург; Александр Борисович Евтихиев; Александр Алексеевич Лысов; Любовь Владимировна Одинцова; Леонид Исаакович Шуб
Original assignee: Северо-Западный Заочный Политехнический Институт
Priority date: 1980-09-26
Filing date: 1980-09-26
Publication date: 1982-05-15

Description

Изобретение относится к гидромашиностроению, более конкретно, к конструкциям насосов с приводом через магнитную муфту, предназначенных для перекачивания агрессивных, токсичных или особо чистых жидкостей. ⁵ The invention relates to hydraulic engineering, and more particularly, to the design of pumps driven through a magnetic coupling, designed for pumping aggressive, toxic or very clean liquids. ⁵

Известен герметичный насос, содержащий корпус и размещенное в нем рабочее крлесо, связанное с валом привода посредством магнитной муфты с цилиндрическими ведомой и ведущей полумуфтами, разделенными экраном, герметично закрепленным на корпусе [1].Known hermetic pump containing a housing and housed in it working wheel connected to the drive shaft by means of a magnetic coupling with a cylindrical driven and leading coupling halves separated by a screen hermetically mounted on the housing [1].

Недостатком этой конструкции является относительно малый передаваемый момент.The disadvantage of this design is the relatively small transmitted moment.

Наиболее близким к изобретению по технической сущности и достигаемым результатам является герметичный центробежный насос, содержащий корпус и раэ- _ммешенное в нем на радиальной опоре рабочей колесо со ступицей, связанное с валом привода посредством магйигной муфты с цилиндрическими ведомой и ведущей полумуфтами, разделенными экраном, герметично закрепленным на корпусе, причем ведомая полумуфта имеет боковые зубцы и чередующиеся с ними канавки С2].The closest to the invention in the technical essence and achieved result is a sealed centrifugal pump comprising a casing and RAE _m Mechain therein for radial support of the working wheel with a hub connected with the drive shaft through clutch magyignoy cylindrical leading and trailing coupling halves separated by screen sealingly mounted on the housing, and the driven coupling half has lateral teeth and alternating grooves C2].

Однако указанный насос имеет недостаточно высокую надежность, особенно при малых давлениях перекачиваемой жидкости, и относительно сложную конструкцию.However, this pump is not sufficiently reliable, especially at low pressures of the pumped liquid, and a relatively complex design.

Цель изобретения - повышение надежности работы насоса при малых давлениях перекачиваемой жидкости и упрощение конструкции.The purpose of the invention is to increase the reliability of the pump at low pressures of the pumped liquid and simplify the design.

Поставленная цель достигается тем, что в ведомой полумуфте и ступице выполнены каналы, и канавки посредством последних сообщены с областями всасывания и нагнетания насоса, а радиальная опора образована боковыми поверхностями ведомой полумуфты и экрана.This goal is achieved by the fact that the channels are made in the driven coupling half and the hub, and the grooves are connected with the suction and discharge areas of the pump by means of the latter, and the radial support is formed by the lateral surfaces of the driven coupling half and the screen.

На фиг. 1 схематически изображен насос, разрез А-А на фиг. 2; на фиг. 2 разрез Б-Б на фиг. 1.In FIG. 1 schematically shows a pump, section AA in FIG. 2; in FIG. 2, section BB in FIG. one.

928074 4928074 4

Насос содержит корпус 1 и размешенное в нем на радиальной опоре рабочее' колесо 2 со ступицей 3, связанное с ваяем 4 привода посредством магнитной муфты с цилиндрическими ведомой и ве- s душей полумуфтами 5 и 6 соответственно, разделенными экраном 7, герметично закрепленным на корпусе 1. Ведомая пелумуфта 5 имеет боковые зубцы 8 и чередующиеся с ними канавки 9. В ведо- 10 мой полумуфте 5 и ступице 3 выполнены каналы 10-13 и канавки 9 посредством последних сообщены с областями всасывания и нагнетания насоса, а радиальная опора образована боковыми поверхности- »5 ми 14 и 15 соответственно ведомой полумуфты 5 и экрана 7.The pump comprises a housing 1 and an impeller 2 with a hub 3 placed in it on a radial support and connected to a drive assembly 4 by means of a magnetic coupling with cylindrical driven and weighing halves 5 and 6, respectively, separated by a shield 7, tightly fixed to the housing 1 The driven pelumo coupling 5 has lateral teeth 8 and grooves alternating with them 9. The channels 10–13 and grooves 9 are made in the slave 10 of the coupling half 5 and the hub 3 by means of the latter communicating with the pump suction and discharge areas, and the radial support is formed by the lateral surfaces Osti- ”5 mi 14 and 15, respectively, the driven coupling half 5 and the screen 7.

Дроссельные шайбы 16 установлены на выходе из канале® 10 . Кольца 17 и 18, установленные соответственно на ра- за бочем колесе 2 и в корпусе 1, образуют осевую опору.Throttle washers 16 are installed at the outlet of the channel® 10. The rings 17 and 18, mounted respectively on the impeller 2 and in the housing 1, form an axial support.

Насос работает следующим образом, .The pump operates as follows,.

Ведущая полумуфта 6 вращается совместно с валом 4 привода и, находясь в 2S магнитном сцеплении с ведомой полумуфтой 5, приводит во вращение рабочее колесо 2, которое перекачивает жидкость.The leading coupling half 6 rotates together with the drive shaft 4 and, being in 2S magnetic coupling with the driven coupling half 5, drives the impeller 2, which pumps the fluid.

Часть жидкости высокого давления из области нагнетания насоса по каналам 12 и 10,выполненным соответственно в ступице 3 и в ведомой полумуфте 5, частично дросселируясь в шайбах 16, поступает в канавки 9, которые служат несущими камерами гидростатической радиальной опо- _Jsры. Отвод жидкости из канавок 9 в область всасывания насоса происходит че рез центральный канал 11 ведомой полумуфты 5 и каналы 13 в ступице.Part of the high pressure fluid from the pump discharge area through the channels 12 and 10 formed respectively in the hub 3 and the driven coupling half 5, partially in throttling washers 16 enters the groove 9, which serve as a hydrostatic radial bearing chambers mediated _Js ry. Liquid is drained from the grooves 9 to the pump suction region through the central channel 11 of the driven coupling half 5 and channels 13 in the hub.

Радиальная опора имеет большой диаметр, равный диаметру ведомой полумуфгы 5, что позволяет ей надежно функционировать при малых давлениях перекачиваемой жидкости.The radial bearing has a large diameter equal to the diameter of the driven half-coupling 5, which allows it to function reliably at low pressures of the pumped liquid.

Claims

The invention relates to hydraulic machine building, more specifically, to designs of pumps with a water heater through a magnetic coupling designed for pumping aggressive, toxic or highly pure liquids. A hermetic pump is known, comprising a housing and a working cylinder accommodated therein, associated with a drive shaft of analyzing a magnetic coupling with cylindrical driven and half coupling halves, separated trance, hermetically mounted on the housing Sh. The disadvantage of this design is the relatively small transmitted moment. The closest to the invention in its technical essence and the achieved results is a hermetic centrifugal pump comprising a housing and an impeller mounted on it on a radial bearing with a hub connected to the shaft of the drive by means of a magite clutch with cylindrical driven and half coupling sleeves separated by a screen , hermetically mounted on the housing, and the half coupling coupling is known to have side teeth and grooves C23 alternating with them. However, this pump has insufficient reliability, especially at low pressures of the pumped fluid, and a relatively complex design. The purpose of the invention is to increase the reliability of the pump at low pressures of the pumped liquid and simplify the design. The goal is achieved by the fact that channels are made in the coupling half and the hub, and the grooves are connected to the suction and discharge areas of the pump by means of the latter, and the radial support is formed by side elevations of the driven coupling and screen. FIG. I schematically shows the pump, section A-A in FIG. 2 | in fig. 2 is a section BB in FIG. I. 3928 The Nasshs comprises a housing I and a slider B on it on a rational support with an impeller 2 with a hub 3 connected to a vap 4 driven by a magnetic coupling with cylindrical driven and driving coupling halves 5 and 6, respectively, separated by shield 7 sealed to the housing I. Led pvlumufta 5 has side teeth 8 and alternating grooves 9, In the driven floor 1ufta 5 and hub 3, channels 10-13 and grooves 9 are made, the latter are connected to suction areas and pump discharge, and the radial bearing is formed by lateral turning Shost 14 and 15 respectively of the driven coupling part 5 and the screen 7. The throttle washer It) mounted ive output of the channel Yu. Rings 17 and 18, installed respectively on the impeller 2 and in the housing 1, form an axial bearing. The pump works barely. The driving half coupling 6 rotates together with the drive shaft 4 and, being in magnetic coupling with the driven coupling half 5, drives the impeller 2, which pumps the liquid. Part of the high-pressure fluid from the pump discharge area through the channels 12 and 109, respectively, performed in the hub 3 and in the driven half coupling 5, partially curved in the washers 16, flows into the grooves 9, which serve as supporting chambers of the hydrostatic radial bearing. Fluid from the grooves 9 to the pump suction area occurs through the central channel 11 of the driven coupling half 5 and channels 13 in the hub. The radial bearing has a large diameter, equal to the diameter of the driven half coupling 5, which allows it to function reliably at low pressures of the pumped liquid. The formula of the invention A hermetic centrifugal pump comprising a housing and an impeller placed on it on a radial bearing with a hub connected to the drive shaft by means of a magnetic coupling with cylindrical driven and half coupling halves separated by a screen hermetically mounted on the housing alternating grooves with them, which is also distinguished by the fact that, in order to increase the reliability of operation at low pressures of the pumped liquid and simplify the design, in the driven coupling half in the hub The channels are made, and the grooves are connected to the suction and discharge areas of the pump by means of the latter, and the radial support is formed by the side surfaces of the driven coupling half and the screen, Infections sources taken into account in examination I. France Patent No. 2073621, cl. F O4 D 13/00, published, 1971, 2, USSR Author's Certificate N 687259, class, F O4 D 13 / OO, 1977,