Split heat-insulation double-sided water pump impeller

Abstract

The invention discloses a split heat-insulation double-sided impeller structure which comprises a large impeller 1 and a small impeller 2, wherein the large impeller 1 and the small impeller 2 are arranged axially in an interference fit manner, after being assembled, the large impeller 1 and the small impeller 2 form a heat-insulation structure 3 at the back of the impeller, and the heat-insulation structure is internally filled with a heat-insulation material or a coating with end surface coated with zirconium oxide. For a double-sided cooling water pump of a high-low-temperature double-loop cooling system meeting the application of a diesel engine, the working temperatures of cooling media at two sides of the impeller are commonly different, if the heat-insulation measure is not taken, the impeller is made of metals, so that strong heat transfer capability causes large influence on the heat dissipation at two sides during long-time working. The split heat-insulation impeller adopted can reduce the mutual temperature influence of two high-low-temperature sides, and meet the long-time working demand of high-low-temperature loops.

Description

technical field [0001] The technical field of the invention is the field of rotating machinery, especially the impeller that realizes that the same water pump satisfies the working requirements of two different temperatures. Background technique [0002] The patent application with the application number 201010197780.5 discloses a centrifugal water pump water pump, which includes a transmission shaft, bearings, fasteners, bearing housings, volutes, water inlet trays, impellers and mechanical seals. The impellers include long blades and short blades. 5 blades and 5 short blades are arranged alternately, the diameter of the middle shaft hole of the blade is 18mm, the diameter of the hub is 24mm, the outer diameter of the impeller is 133.6mm, the diameter of the inlet of the long and short blades is 66mm, the installation angle of the inlet of the long and short blades is 36°, and the diameter of the long and short blades is 36°. The blade inlet height is 17mm, the long and sho...

AI Technical Summary

Problems solved by technology

[0004] Generally, the water pump impeller is made of metal, and the temperature difference of the cooling medium on both sides of the double-sided impeller is more than 30°C. The heat transfer of the double-sided impeller has a great influence on the temperature of the coolant on both sides, and the impact of temperature changes on the matching of the cooling circuit leads to The harsh working environment of the engine affects the reliability of the engine

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