Middle discharge section of multi-outlet horizontal single-suction segmental multi-stage centrifugal pump

Abstract

The invention discloses a middle discharging section of a multi-outlet horizontal single-suction sectional multistage centrifugal pump. The middle discharging section comprises a discharging flange, a discharging section, a bracket bottom plate, a sealing ring, a spiral flow eliminating guide vane, a bracket plate and a discharging section supporting leg, wherein the discharging section is fixed on the discharging section supporting leg; a pumping chamber is arranged in the discharging section; an importing opening, a discharging opening and an exporting opening are formed in the discharging section; the importing opening and the exporting opening are respectively corresponding to an upper-stage impeller and a lower-stage impeller; the discharging opening is formed in the upper end of the discharging section and communicated with the discharging flange; the bracket bottom plate is arranged on the discharging section on the inner side of the exporting opening; the bracket plate is arranged in the pumping chamber and close to one side of the importing opening; the spiral flow eliminating guide vane is arranged on the bracket plate and extends toward the end of the bracket bottom plate; the sealing ring is matched with the inner wall of the exporting port. The middle discharging section has a function of supplying water with different pressures and flows, and is wide in flow regulation range, good in flow regime and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of centrifugal pumps, in particular to an intermediate discharge section of a multi-outlet horizontal single-suction segmental multistage centrifugal pump. Background technique [0002] At present, when a high-pressure feed water pump supplies water to multiple applications that require different pressures, such as high-pressure and medium-pressure, a pressure-reducing valve is usually used to adjust the outlet pressure to meet the needs of medium-pressure and low-pressure users, but a pressure-reducing valve is used to adjust The outlet pressure throttling method will consume energy and is not energy-saving; or use multiple pumps with different lifts (high-pressure and medium-pressure output) to provide high-pressure, medium-pressure and low-pressure water flows to meet the needs of multiple applicable occasions. Such a structure Increased equipment quantity and cost, also took up more space. [0003] Chin...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that the throttling method of multi-stage pumps in the prior art using a pressure reducing valve to adjust the outlet pressure consumes energy and does not save energy, and uses multiple pumps with different lifts (high pressure and medium pressure output) to provide high pressure respectively. , medium pressure and low pressure water flow to meet the needs of multiple applicable occasions, the structure is more complicated, the cost is high, and the problem of occupying space is provided. It can not only output the pressure and part of the flow of the front impeller with the minimum loss, but also can The remaining flow is smoothly input to the middle discharge section of the multi-outlet horizontal single-suction segmental multi-stage centrifugal pump that continues to be pressurized by the next-stage impeller

Images