Spiral Volute Wrap-Angle Design for Compact Centrifugal Pumps
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Solution Overview
Problem
Traditional centrifugal pumps in dishwashers have varying radial dimensions due to different mounting distances required by manufacturers, leading to the need for motors with diverse radial dimensions, increasing production complexity for motor suppliers.
Innovation Solution
A centrifugal pump design with a spiral volute having a wrap angle of 360 to 460 degrees, optimized with specific angles and edge configurations, allowing for reduced radial dimensions while maintaining compatibility with existing motor brackets by increasing the wrap angle without altering the mounting distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the wrap angle of the spiral volute is increased to reduce radial dimension, then the radial dimension of the volute is reduced, but the mounting distance requirements from different manufacturers still cause variability
Solution Approach 1:
The patent applies parameter changes by increasing the wrap angle of the spiral volute from the traditional less than 360 degrees to between 360-460 degrees. This parameter modification allows the volute to achieve a more compact radial dimension while maintaining the necessary mounting distance compatibility across different manufacturer requirements, thus resolving the contradiction between reducing radial size and maintaining adaptability.
2Adaptability or versatility
If different radial dimensions are used to match different volutes, then compatibility with various pump designs is achieved, but device complexity for motor production increases
Solution Approach 1:
The patent implements universality by designing the motor bracket with a standardized radial dimension that can accommodate multiple volute designs with different wrap angles. The bracket is engineered to be compatible with volutes having wrap angles between 360-460 degrees, allowing a single motor bracket design to serve multiple pump configurations, thereby reducing device complexity while maintaining broad compatibility.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enables the production of motors with standardized radial dimensions, reducing manufacturing complexity and improving pump efficiency and noise levels by minimizing flow separation and optimizing water flow.
Implementation Method 1
improving pump efficiency and noise levels by minimizing flow separation and optimizing water flow
Implementation Method 2
a centrifugal pump having a motor, an impeller driven by the motor, and a spiral volute
Data Source
AI summary
A centrifugal pump has an electric motor, an impeller driven by the motor and a spiral volute. The impeller has an annular base plate and a plurality of vanes arranged on the base plate. The spiral volute has an inlet, an outlet and an impeller chamber in which the impeller is disposed. The inlet extends outwardly from a top wall of the volute. The outlet extends outwardly from a side wall of the volute in the spiral direction of the volute. The spiral volute has a wrap angle between 360 to 460 degrees. A washing apparatus incorporating the centrifugal pump is also provided.