RU26608U1 - MULTI-STAGE SECTIONAL CENTRIFUGAL PUMP - Google Patents

Description

MULTI-STAGE SECTIONAL CENTRIFUGAL PUMP

IPC F04D 1/06, F04D 29/44

The utility model relates to the field of pump engineering, in particular, to multi-stage sectional centrifugal pumps designed for pumping liquid, for example, for flooding oil reservoirs.

Known multistage sectional centrifugal pump CNS-180 from the book Vane pumps. Theory, calculation and design, authors A.K. Mikhailov, V.V. Malyushenko, Moscow, Mechanical Engineering, 1977, 288 pp., Containing a housing made of sections pulled together by studs, input and output channels made in the extreme sections, and pump stages located in the intermediate sections and consisting of an impeller and a guide vane with diffuser channels.

The disadvantage of this pump is reduced efficiency and pressure at high flows. To increase the efficiency and pressure at high flows, a multistage sectional centrifugal pump of the TsNS-180 type, comprising a housing made of sections pulled together with studs, inlet and outlet channels made in the extreme sections, and pump stages located in the intermediate sections and consisting of the impeller and a guiding apparatus with diffuser channels, it is intended to be implemented with diffuser channels of the guiding apparatus, each of which has a passage width in the planned projection at the inlet - a4 of 22-24.6 mm.

Figure 1 shows the meridian section of the pump; 2 shows a meridian section of a pump stage, FIG. 3 shows a planned projection of a diffuser channel of a guiding ash1arata;

A multistage sectional centrifugal pump of the TsNS-180 type contains a housing 1 made of sections pulled together by pins 2, inlet and outlet channels 3 and 4, made in the outer sections 5 and 6, and pump stages located in the intermediate sections 7 and consisting of an impeller 8 and a guiding apparatus 9 with diffuser channels 10, each of which has a passage width in a plan view at the inlet - a4 equal to 22-24.6 mm.

A multistage sectional centrifugal pump operates as follows. The pump is pre-filled with the pumped liquid. Rotation from a driving electric or other engine is transmitted through the pump shaft to the impellers of the stages installed sequentially one after another. In this case, energy is transferred from the impellers to the liquid, which flows from the input channel through all stages and further into the output channel. The guide apparatus of each stage converts the rotational motion of the liquid after the impeller into a translational one.

while raising the potential pressure and optimizing the fluid inlet into the next impeller.

During the operation of the pump, energy losses are inevitable, the specific gravity of which in relation to the useful work in each particular mode depends, in particular, on the geometry of the flow part of the pump, including the geometry of the diffuser channels of the guide vane.

The proposed dimensions of the diffuser channels of the guide vane will increase the efficiency and pressure of the pump in the high-flow area, and, therefore, will make it possible to efficiently use this pump in this mode without major changes in the design of the existing pump.

Claims (1)

A multistage sectional centrifugal pump type TsNS-180, comprising a housing made of sections pulled together by studs, inlet and outlet channels made in the outer sections, and pump stages located in the intermediate sections and consisting of an impeller and a guide vane with diffuser channels, characterized the fact that each of the channels has a passage width in the planned projection at the entrance - a4, equal to 22-24.6 mm.