RU26607U1 - MULTI-STAGE SECTIONAL CENTRIFUGAL PUMP - Google Patents

Description

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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 the impeller and guide vane with diffuser channels.

The disadvantage of this pump is reduced efficiency, pressure and unstable operation at low feeds. To increase efficiency, pressure and ensure stable operation at low feeds, a multistage sectional centrifugal pump type TsNS-180, comprising a housing made of sections pulled together with 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, it is proposed to fill with diffuser channels of the vane, each of which has a passage width in a plan view on stroke - a4 equal to 10.5 -17.9 mm, while the width of the diffuser channel in the meridian section B4 is 10.5 -18.6 mm.

Figure 1 shows the meridian section of the pump; 2 shows a meridian section of a pump stage; FIG. 3 shows a plan view of the diffuser channel of the guide vane.

The multistage sectional centrifugal pump type TsNS-180 contains a housing 1 made of sections pulled together by studs 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 10.5 - 17.9 mm, while the width of the diffuser channel in the meridian section b4 is 10.5 -18 , 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 movement of the liquid after the impeller into the translational one, 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 geomegria 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, avoid unstable operation in the field of small flows, and, therefore, make it possible to effectively 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 end sections and pump stages located in the intermediate sections and consisting of an impeller and a guide vane with diffuser channels, characterized in that each of the channels has a passage width in the plan view at the inlet - a4 equal to 10.5-17.9 mm, while the width of the diffuser channel in the meridian section B4 is 10.5-18.6 mm.