SU742627A1

SU742627A1 - Pump unit

Info

Publication number: SU742627A1
Application number: SU752174770A
Authority: SU
Inventors: Василий Михайлович Власов; Петр Прохорович Фролов; Владимир Трофимович Дмитриев; Юрий Яковлевич Теребынкин
Original assignee: Свердловский Ордена Трудового Красного Знамени Горный Институт Им. В.В.Вахрушева
Priority date: 1975-09-26
Filing date: 1975-09-26
Publication date: 1980-06-25

Description

(54) НАСОСНЫЙ АГРЕГАТ(54) PUMP UNIT

1one

Изобретение относитс к насосным агрегатам , работающим в комплекте с устройствами дл приема жидкости в технологических лини х обогатительных фабрик при гидротранспорте сыпучих материалов на большое рассто ние.The invention relates to pumping units operating in conjunction with devices for receiving fluid in processing lines of enrichment plants during hydrotransport of bulk materials over a long distance.

Известен насосный агрегат, содержащий насос , приемное устройство, внутри которого размещен поплавок, выходной и подающий трубопроводы 1.,дKnown pump unit that contains the pump, the receiving device, which is located inside the float, output and supply pipelines 1., d

Недостатком известного насосного агрегата вл етс быстрый кавитационный износ рабочих поверхностей насоса из-за колебаний столба жидкое ти на входе в насос вызванных беспор дочным, хаотичньпл движением рабочей жидкости в,5The disadvantage of the known pumping unit is the rapid cavitational wear of the working surfaces of the pump due to the oscillations of the liquid column at the pump inlet caused by random, chaotic movement of the working fluid in

приемном устройстве.receiving device.

Цель изобретени - уменьшение кавитациоиного износа рабочих поверхностей насоса.The purpose of the invention is to reduce the cavitational wear of the pump working surfaces.

Это достигаетс тем, что в насосном агрегате с приемным устройством, содержащим попла- j вок подвод щий патрубок закреплен под поплавком.This is achieved by the fact that in a pumping unit with a receiving device containing a float, a supply pipe is fixed under the float.

На чертеже схематично изображен насосный агрегат с приемным устройством.The drawing schematically shows a pump unit with a receiving device.

Насосный агрегат содержит лопастный насос 1, приемное устройство 2 с подвод щим патруб ком 3, установленное на всасывающей магистрали 4 насоса 1, и поплавок 5. Подвод щий патрубок 3 закреплен в приемном устройстве 2 под поплавком 5. В приемном устройстве 2 размещены нижний 6 и верхний 7 ограничители , последний из которых выполнен либо заодно с крышкой 8 приемного устройства 2, либо присоединен к ней герметично. Крыщка 8 с отверстием 9 снабжена эластичной прокладкой 10, предназначенной дл герметизации приемного устройства 2 на случай превыщени притока жидкости в приемное устройство над производительностью насоса. Площадь поплавка 5 превышает площадь проходного сечени отверсти 9.The pump unit contains a paddle pump 1, a receiving device 2 with an inlet nozzle 3 mounted on the suction line 4 of pump 1, and a float 5. The inlet 3 is fixed in the receiving device 2 under the float 5. The receiving device 2 has the lower 6 and upper 7 limiters, the last of which is made either at the same time with the cover 8 of the receiving device 2, or attached to it tightly. The lid 8 with the opening 9 is provided with an elastic gasket 10 intended to seal the receiving device 2 in case of excess fluid inflow into the receiving device over the pump capacity. The area of the float 5 exceeds the area of the passage section of the hole 9.

Насосный агрегат работает следующим образом .The pump unit operates as follows.

Claims

Before starting pump 1, the receiving device 2 is filled with air, and the float 5 is in its lower position supported by the lower limiter 6. Liquid (or pulp) flowing through the inlet 3 to the receiving device 2, and from there to pump 1 when it reaches the upper limiter 7, acting on the special device (not shown in the drawing), the pump automatically starts up. The liquid level — in the receiving device 2 varies within the zone defined by the lower and upper limiters 6 and 7. In case of The inflow of fluid (or pulp) above the performance of pump 1 float 5 rises with the fluid and occupies the upper position, pressing against the upper stopper 7. Due to the elastic gasket 10, the internal volume of the receiver 2 is sealed, resulting in a new dynamic equilibrium of the pump unit. Entering the working fluid into the receiving device 2 under the float 5 minimizes the likelihood of turbulence, and the float 5 prevents the occurrence of ridges on the surface of the liquid in the receiving device 2, which, in turn, reduces the likelihood of oscillations liquid column before entering the pump and thereby reduces the cavitation wear of the working surfaces of the pump 1. The use of the device increases the service life of pumping units. Claims of the invention A pump unit comprising a pump, on the suction line of which a receiving device with a float and an inlet is installed, is distinguished by the fact that, in order to reduce cavitational wear on the working surfaces of the pump, the inlet is fixed under the float. Sources of information taken during the examination 1. Patent Art. Germany No. 462785, cl. 59B, 2 1928.