SU754117A1

SU754117A1 - Centifugal pump impeller

Info

Publication number: SU754117A1
Application number: SU772540611A
Authority: SU
Inventors: Николай Николаевич Летов; Василий Степанович Лапаев
Priority date: 1977-11-04
Filing date: 1977-11-04
Publication date: 1980-08-07

Description

Изобретение относится к области насосостроения, а именно к рабочим колесам центробежных насосов.The invention relates to the field of pump engineering, namely to the impellers of centrifugal pumps.

Известно рабочее колесо центробежного насоса с лопатками, закрепленными между ведомым и ведущим дисками, последний из которых выполнен с подрезкой. Такое выполнение рабочего колеса позволяет уравновешивать осевую силу [1] . Однако при этом за счет увеличения пространства, в области подрезки снижается окружная скорость жидкости и уменьшается развиваемый колесом напор.It is known the impeller of a centrifugal pump with blades fixed between the driven and driving disks, the last of which is trimmed. This embodiment of the impeller allows you to balance the axial force [1]. However, at the same time, due to the increase in space, the circumferential velocity of the liquid decreases in the cutting area and the pressure developed by the wheel decreases.

Цель изобретения - повышение напора и уравновешивание осевой силы.The purpose of the invention is to increase the pressure and balance the axial force.

Поставленная цель достигается тем, что лопатки выполнены выступающими в области подрезки за торцовую поверх- jq ность ведущего диска.This goal is achieved in that the blades are made protruding in the area of cutting beyond the end surface jq of the drive disk.

На чертеже изображено рабочее _хколесо в меридиональном сечении.The drawing shows the impeller _x in a meridional section.

Рабочее колесо содержит лопаткиImpeller contains vanes

1, закрепленные между ведомым и ве- 25 душим дисками 2 и 3 соответственно. Ведущий диск 3 выполнен с подрезкой, а лопатки 1 выступают в Области под- резки за торцовую поверхность 4 ведущего диска 3.1, fixed between the slave and the 25 discs 2 and 3, respectively. The leading disk 3 is trimmed, and the blades 1 protrude in the area of undercutting beyond the end surface 4 of the leading disk 3.

При увеличенной ширине лопастей в области подрезки ведущего диска, жидкость будет вращаться с увеличенной угловой скоростью. Развивающийся в этом случае центробежный эффект способствует повышению развиваемого колесом напора и снижению среднего статического давления жидкости в пространстве за рабочим колесом, а следовательно, и уменьшению результирующей осевой силы.With the increased width of the blades in the area of cutting the leading disk, the fluid will rotate at an increased angular velocity. The centrifugal effect that develops in this case helps to increase the pressure developed by the wheel and to reduce the average static fluid pressure in the space behind the impeller, and, consequently, to reduce the resulting axial force.

Применение рабочего колеса предлагаемой конструкции позволяет создать высокоэкономичную конструкцию центробежного насоса, обладающего сниженной металлоемкостью и трудоемкостью изготовления, сравнительно высокими показателями надежности и долговечности, простотой конструктивного исполнения.The use of the impeller of the proposed design allows you to create a highly economical design of a centrifugal pump with reduced metal consumption and laboriousness of manufacture, relatively high reliability and durability, simplicity of design.

Claims

The invention relates to the field of pump construction, namely to impellers of centrifugal pumps. A centrifugal pump impeller is known with blades fixed between the driven and the leading disks, the last of which is made with trimming. This embodiment of the impeller allows the axial force i to be balanced. However, by increasing the spaces in the undercut area, the circumferential velocity of the fluid decreases and the pressure developed by the wheel decreases. The purpose of the invention is to increase the head and balance the axial force. The goal is achieved by the fact that the blades are made protruding cutting areas beyond the end surface of the drive disk. The drawing shows an impeller X in the meridional section. The impeller contains blades 1, fixed between the leading and driving disks 2 and 3, respectively. The drive disk 3 is made with undercutting and the blades 1 protrude in the area under the cuttings beyond the end surface 4 of the drive disk 3. With the increased width of the blades in the area of the undercutting of the drive disk, the fluid will rotate with an increased angular velocity. The centrifugal effect developed in this case helps to increase the head developed by the wheel and to reduce the average static pressure of the fluid in the space behind the impeller, and consequently, to reduce the resulting axial force. The use of the impeller of the proposed design makes it possible to create a highly economical design of a centrifugal pump with reduced metal consumption and laboriousness of manufacture, relatively high reliability and durability indicators, and simplicity of design. Claims of the invention: A centrifugal axle impeller with blades fixed between the slave and manual discs, the latter of which is made with trimming, characterized in that

In order to increase the head and equals. hanging axial forces, the blades are made protruding in the area of trimming beyond the end surface of the drive disk.

Sources of information taken into account in the examination

1, USSR Author's Certificate 255777, cl. R 04 D, 29/20, 1968.