Roots Pump Rotor Profile Design Area Determination
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Solution Overview
Problem
The existing design process for roots pump rotor profiles often results in issues like closed volume and undercutting, which are not detected until the design is completed, leading to reduced design efficiency and qualification rates.
Innovation Solution
A method is developed to determine the reasonable design area of roots pump rotor profiles by establishing relationships between performance parameters, such as pumping rate and rotor area utilization coefficient, and applying constraint conditions to avoid closed volume and undercutting, thereby guiding the design to prevent these issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rotor profile design is completed using traditional methods, then design parameters can be determined, but closed volume and undercutting problems are only detected after design completion, reducing design efficiency
Solution Approach 1:
The patent applies preliminary action by establishing constraint conditions and determining the reasonable design region of rotor profiles before the actual design process. By pre-defining the mathematical relationships and constraint boundaries (such as the relationship between blade peak curve parameters and performance parameters), the method enables designers to select valid parameters within the reasonable design region from the outset, avoiding closed volume and undercutting issues before they occur. This preliminary establishment of design boundaries significantly improves design efficiency by eliminating the need for post-design detection and revision.
2Productivity
If rotor area utilization coefficient is increased to improve pumping rate, then air quantity and pumping rate increase, but closed volume and undercutting problems become more likely
Solution Approach 1:
The patent applies parameter changes by establishing a reasonable design region through mathematical constraints on rotor profile parameters. The method transforms the design process from trial-and-error to a systematic approach where designers can select parameter combinations (such as blade peak curve coordinates and shapes) that simultaneously achieve high rotor area utilization coefficients and avoid closed volume and undercutting. By defining the reasonable design region with explicit parameter boundaries and relationships, the patent enables optimization of pumping rate while ensuring design qualification.
Data Source
AI summary
The disclosure discloses a method for determining reasonable design area of roots pump rotor profile of roots pump and its application, and belongs to the field of mechanical design. According to the method of the disclosure, after a relation between the roots pump rotor profile and performance parameters is established, constraint conditions for avoiding a closed volume and undercutting are further determined, so that a reasonable design region of a roots pump rotor blade peak curve is determined. Reference is given when the roots pump rotor profile is designed, i.e., the rotor profile with the blade peak curve being not within the reasonable design region inevitably causes the problem of closed volume or undercutting in application, so that the design of the rotor profile that causes the closed volume or undercutting can be avoided when the roots pump rotor profile is designed. The problem that the design unreasonableness of the rotor profile is not found until the design is completed is solved, so that the design efficiency of the rotor profile is improved.