Propeller Pump Blade Trimming for Duty Point Adaptation
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Solution Overview
Problem
Propeller pumps face challenges in adjusting the duty point to a desired setting due to complex processes with adjustable blades, and fixed blades require numerous configurations to cover various applications, leading to inefficiencies and increased manufacturing costs.
Innovation Solution
A method for manufacturing propellers with fixed blades that involves axial trimming to adapt to different duty points, reducing the need for adjustable pitch angles and minimizing the number of required propeller configurations, allowing for precise adjustment and reduced manufacturing efforts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If adjustable blades are used to adapt to different duty points, then the propeller can be precisely adapted to desired duty points, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The patent changes the parameter of blade configuration from adjustable pitch angles to fixed blades with varying axial lengths. By trimming blades to different axial lengths in a base propeller, different duty points are achieved without the complexity of adjustable mechanisms, thus resolving the contradiction between adaptability and assembly complexity
2Productivity
If fixed blades are used to simplify the assembly process, then the assembly time is reduced, but numerous different propeller configurations are required to cover various applications
Solution Approach 1:
The patent makes a single base propeller universal by enabling it to serve multiple duty points through blade trimming. The base propeller with blades of different axial lengths can be adapted to various applications by selectively trimming blades, eliminating the need for numerous different propeller configurations while maintaining assembly simplicity
3Adaptability or versatility
If multiple propeller configurations are maintained to cover all applications, then all duty points can be addressed, but manufacturing costs and inventory requirements increase
Solution Approach 1:
The patent reduces the number of propeller variants by creating a universal base propeller design. Instead of manufacturing and storing multiple different propeller configurations, a single base propeller type is produced and then customized through blade trimming to meet specific duty point requirements, thereby reducing inventory needs and manufacturing costs
Data Source
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AI summary
A method for manufacturing a propeller for a propeller pump is proposed, wherein the propeller (1) is designed for rotating about an axial direction (A), wherein a base propeller (1a) is provided, comprising a hub (2) extending from an axial end (21) in the axial direction (A), and a plurality of blades (3) fixedly connected to the hub (2), wherein each blade (3) comprises a pressure side (31), a suction side (32), a leading edge (33), an initial trailing edge (34), and a blade tip (35) extending from the leading edge (33) to the initial trailing edge (34) at the end of the blade (3) facing away from the hub (2), wherein each of the blades (3) of the base propeller (1a) is trimmed regarding the axial direction (A), and wherein a modified trailing edge (341) is formed by removing a part of the initial trailing edge (34) along the entire pressure side (31) from the hub (2) to the blade tip (35). Furthermore, a propeller and a propeller pump are proposed.