Novel hydrodynamic turbine pump free of shaft seal structure

Abstract

The invention relates to a novel hydrodynamic turbine pump free of a shaft seal structure. A hydraulic turbine and a pump are coaxial, sliding bearing support shafts and axial positioning are adopted, and a transmission mechanism and a shaft seal are omitted. The working principle of the novel hydrodynamic turbine pump is as follows: a liquid flows into the hydrodynamic turbine pump from an inlet of the hydraulic turbine, rotating wheels are impacted and rotate, and impellers are driven by the shaft to rotate. In a working process, right and left sliding bearings of the hydraulic turbine support the shafts and the axial positioning, a high pressure liquid introduced from a turbine casing enters cavities of the sliding bearings through a liquid flushing pipe and a filter, one part of the liquid enters a lower pressure area of a left end pump cavity through the left sliding bearing, the other part of the liquid enters a lower pressure area of a right end pump cavity through the right sliding bearing, and the introduced liquid cools and lubricates the right and left sliding bearings respectively. The turbine and the pump are coaxial, and the sliding bearing support shafts, the axial positioning, medium own circulation, cooling and lubrication structures and the like are used, and the shaft seal (a mechanical seal, framework seal and the like) is not required to be arranged, so that the hydrodynamic turbine pump is free of the shaft seal and compact in structure.

Description

technical field [0001] The invention relates to fluid machinery, in particular to a new hydraulic turbine pump with no shaft seal structure, which is mainly used for recovering liquid energy, transporting flammable and explosive media without power supply, or improving the suction capacity, etc. Background technique [0002] In order to recover liquid energy, a hydraulic turbine energy recovery device is developed. Existing devices for recovering liquid energy include water turbine pumps, hydraulic turbines, and the like. The water turbine pump has a large volume and complex structure, and the maintenance work is cumbersome. In existing hydraulic turbines, rolling bearings are used at both ends of the shaft. In order to prevent water from entering the rolling bearings, shaft seals (mechanical seals or skeleton seals, etc.) are provided. There is a problem of shaft seal leakage during operation. Contents of the invention [0003] In order to make the structure of the hydr...

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Problems solved by technology

[0003] In order to make the structure of the hydraulic turbine pump as compact as possible, and to improve the existing similar products that occupy a large space and have problems such as shaft seal leakage, the present invention provides a new type of hydraulic turbine pump with no shaft seal structure.

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