SU901644A1

SU901644A1 - Centrifugal pump

Info

Publication number: SU901644A1
Application number: SU792859482A
Authority: SU
Inventors: Геннадий Александрович ОЛЕЙНОВ
Original assignee: Предприятие П/Я Р-6521
Priority date: 1979-12-26
Filing date: 1979-12-26
Publication date: 1982-01-30

Description

(5 ЦЕНТРОБЕЖНЫЙ НАСОС(5 CENTRIFUGAL PUMP

1one

Изобретение относитс к гидромашиностроению , более конкретно к средствам дл автоматического урав новешивбни осевой силы центробежных насосов.The invention relates to hydraulic engineering, more specifically to means for automatically balancing the axial force of centrifugal pumps.

Известен центробежный насос, содержащий корпус с входным патрубком, установленное в корпусе на валу с возможностью осевого перемещени рабочее колесо, имеюцее диск, образующий с корпусом разгрузо(|ную камеру, уплотненную oт ocитeльнo проточной части колеса периферийной и внутренней дросселирующими агел ми, которые образованы кольцевыми выступами диска колеса и Kopnycafi}A centrifugal pump is known, comprising a housing with an inlet nozzle, mounted in a housing on a shaft with the possibility of axial movement of an impeller, having a disk that forms with the housing an unloading (inner chamber) sealed from the peripheral part of the impeller wheel and internal throttling distributors, which are formed by annular protrusions of the wheel and Kopnycafi}

Недостатком известной конструкции вл етс снижение Объемного КП/| насоса из-за большой величины утечек Жидкости.A disadvantage of the known construction is the reduction of the Volume KP / | pump due to large fluid leakage.

Известен также центробежный насос содержащий корпус с входным патрубком , установленное в корпусе на валу с возможностью осевого перемещени Also known is a centrifugal pump comprising a housing with an inlet fitting mounted in the housing on the shaft with the possibility of axial movement.

рабочее колесо, имеющее покрывной диск, образующий с корпусом разгрузочную камеру, уплотненную относительно .проточной части колеса периферийной и внутренней тсфцевой дросселирующими щел ми, перва из которых образована кольцевыми выступами диска колеса и корпуса, а втора торцом покрывного диска и установленным в цилиндрической расточке корпуto са плавающим уплотнительным кольцом, взаимодействующим с опоркшм .буртом.an impeller having a disc disk forming with the housing an unloading chamber sealed relative to the flowing part of the wheel of the peripheral and internal tsftsevaya throttling slots, the first of which is formed by annular projections of the wheel disk and the housing and the second end of the covering disk and mounted in a cylindrical bore of the housing a floating sealing ring that interacts with the burr.

Недостаток насоса - сложна конструкци , а также недостаточно высокий КПД, обусловленный посто нным The lack of a pump is a complex structure, as well as an insufficiently high efficiency due to constant

15 перетоком жидкости через вторую дросселирующую щель.15 the flow of fluid through the second throttling gap.

Цель изобретени - повышение КПД путем уменьшени утечек и упрощение The purpose of the invention is to increase efficiency by reducing leaks and simplifying

20 конструкции насоса.20 pump designs.

Claims

The goal is achieved by the fact that the peripheral throttling slot is cylindrical, and the support shoulder is made at the inlet. The drawing shows a centrifugal pump, the cut. The centrifugal pump includes a housing 1 with an inlet nozzle 2 and an impeller mounted in the housing 1 on the shaft 3 for axial movement, having a covering disk 5, which forms with the housing 1 an unloading chamber 6, sealed relative to the flow part of the wheel k peripheral 7 8 throttling slots, the first of which is formed by annular protrusions 9 and 10, respectively, of the disk 5 of the wheel k and the body 1, and the second is the end of the covering disk 5 and a floating seal installed in the cylindrical bore 11 of the housing I th ring 12 cooperating with a support shoulder 13. The peripheral drosseliruyuscha slot 7 is cylindrical, and the support shoulder 13 formed on the inlet pipe 2. The centrifugal pump operates as follows. The fluid is pumped by an impeller. At the same time, part of the fluid from the injection area through the peripheral throttle-resetting slit 7 enters the discharge chamber 6, and from there through the internal end throttle the resetting slit 8 flows to the impeller inlet k. The fluid pressure in the discharge chamber 6 depends on the gap (width) of the end slot 8. Changing this gap causes a corresponding change in pressure in chamber 6, under the action of which the impeller 4 tends to return to its previous position. In this way, the axial force acting on the impeller is automatically balanced. ” The floating ring 12 is constantly pressed against the support collar 13 by the pressure of the fluid in the cylindrical bore 11. This prevents additional fluid flow from the discharge area to the wheel inlet C. The random displacement of the impeller k towards the inlet 2, which is accompanied by the closing of the end slot 8, does not result to the disruption of the pump, as the flow of fluid continues through the gap between the floating ring 13, and the increased pressure in the discharge chamber 6 ensures that the impeller returns to its normal position ation. At the same time, the gap between the ring 12 and the collar 13 is much smaller than the gap in the peripheral throttling gap, the claims of the invention. The centrifugal pump comprising a housing with an inlet fitting mounted on the shaft axially displaceable impeller having a covering disk forming with the housing an unloading chamber sealed with respect to the flow part of the wheel of the peripheral and internal end throttling slots, the first of which is formed by annular projections of the disk of the wheel and the body, and the second - by the end face vnogo disc and mounted in a cylindrical housing floating point races sealing ring cooperating with the supporting collar, characterized in that, in order to increase efficiency by reducing leakage and simplify the construction of the pump, the peripheral drosseliruyuscha gap is cylindrical and the supporting shoulder is formed on the inlet pipe. Information sources, . taken into account in the examination 1. German Patent No., cl. 59 B 3, 1911.

2. USSR author's certificate № to. F 0 D 29 / Oi, 1972.