Centrifugal pump with double helical blade and pair roller granulator using the same

By adopting a double-helix blade design, the fluid flow and the mutual balance between the blades are optimized, which solves the instability and noise problems of single-helix blade pumps at high speeds, improves the stability and efficiency of centrifugal pumps, and is suitable for the humidification spray system of roller granulators.

CN120592904BActive Publication Date: 2026-07-24WENLING ZEGUO CHEM MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WENLING ZEGUO CHEM MACHINERY CO LTD
Filing Date
2025-07-21
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing single-spiral vane pumps are prone to instability, vibration, and noise when operating at high speeds, and perform poorly under complex working conditions, affecting the efficiency and application range of centrifugal pumps, especially impacting granulation quality and efficiency in roller granulators.

Method used

The design employs a double-helix blade, with the first and second blades using different helical shapes and structural parameters, including Archimedean spirals and logarithmic spirals. Combined with multiple twisted blades and a specific angle design, it optimizes fluid flow and the mutual balance between blades, enhancing stability and reducing noise.

Benefits of technology

It effectively reduces vibration and noise, improves the hydraulic efficiency and stability of centrifugal pumps, extends the service life of blades, and improves flow path performance and flow control accuracy.

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    Figure CN120592904B_ABST
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Abstract

The centrifugal pump with double helical blades and the roller granulator using the same adopt double helical blades, the first blade and the second blade affect and balance each other; the profile line of the working surface of the first blade is an Archimedes spiral line, the profile line of the back surface of the second blade is a logarithmic spiral line; the profile line of the back surface of the first blade includes a part of the first constant-pitch spiral line close to the inlet side and a part of the first variable-pitch spiral line away from the inlet side, and the profile line of the working surface of the second blade includes a part of the second variable-pitch spiral line close to the inlet side and a part of the second constant-pitch spiral line away from the inlet side, which can optimize the instability of the fluid in the helical blade pump, reduce the occurrence of vibration and noise, and the second blade in the application is equivalent to the supplement of the first blade, effectively reduces the occurrence of cavitation and cavitation, and improves the hydraulic efficiency and stability of the centrifugal pump to a certain extent.
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