SU1416758A1 - Pump - Google Patents

Abstract

Invention m. used in pumps for high heads and ma /; - lyh innings. The purpose of the invention is to reduce axial forces by equalizing pressures on both sides of the impeller. The walls 3 of the working chamber 2 are provided with spiral cuts 7. The impeller 5 is made as mounted on the hub 6 of the disk 7, on the end surfaces of which alternating spiral lugs and depressions are made. The disk 7 is made of adjacent flexible rods mounted in a spiral. If a difference in fluid pressure occurs at the end surfaces of the disk or if there is any heterogeneity of the flow at any point of its working part, the medium flows through the gaps between the rods, as a result of which the axial force is compensated. 3 pe. yu (L

Description

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The invention relates to pump construction and can be used in pumps for high heads and small flows.

The aim of the invention is to reduce axial vultures by equalizing pressures on both sides of the impeller.

Figure 1 shows the pump, a general view; figure 2 - section aa in figure 1 in Fig; 3 section BB in figure 2.

The pump includes a housing 1 with a working chamber 2, the walls 3 of which are provided with spiral cuts 4, and an impeller 5 in the form of a disk 7 mounted on sleeve 6, on the end surfaces 8 and 9 of which there are interleaved spirals L) 1e projections 10 and valleys P. The disk 7 is made of rods 12 which are attached to each other, which are installed in a spiral, x.

The pump works as follows.

As the impeller rotates, the fluid is thrown to its periphery and fed to the consumer. .

Under the action of centrifugal forces arising from the mass of the rods 12, the latter tend to unbend, increasing their radius of curvature. As a result, between rods 12

the gaps and their ends diverge.

If a difference in the pressure of the liquid occurs on the surfaces 8 and 9 of the disk 7 or any heterogeneous flow at any point of its working part, there is a flow of leakage.

between the rods 12, whereby the axial force is compensated

When the pump is running, the pumped liquid flows into the flow manifold, flowing out of the cavities P and from the gaps between the rods 12. The hydraulic losses are determined by the energy of the end vortices that are released from the rods 12. As the rotor rotates the output ends of the rods 12 are consumed Their fluid flow occurs around the entire perimeter of the profile, which allows corresponding sharpening of the ends of the rods 12 to ensure minimal vortex formation as the fluid leaves them.

Thus, the pump allows to reduce the axial forces acting on the rotor, especially in variable modes and in emergency situations, as well as to obtain an additional reduction in hydraulic losses. Invention Formula

A pump comprising a housing with a working chamber, the walls of which are provided with spiral cuts, and an impeller in the form of a disk mounted on a sleeve, on face surfaces of which

It has alternating spiral protrusions and valleys, different in that 470, in order to reduce axial forces by equalizing pressures on both sides of the impeller, the disk is made of adjacent flexible rods installed in a spiral.

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Claims (1)

Claim A pump comprising a housing with a working chamber, the walls of which are provided with spiral cuts, and an impeller in the form of a disk mounted on the sleeve, on the end surfaces of which are made alternating spiral protrusions and cavities, characterized in that, in order to reduce axial forces by equalizing the pressure on both side of the impeller, the disk is made of adjacent to each other flexible rods mounted in a spiral. -Α-Ά fig 2 figz