Screw-Spindle Pump One-Piece Housing for Cooling Systems
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Solution Overview
Problem
Centrifugal pumps used in cooling systems for electric and hybrid vehicles are inefficient outside a narrow duty point, leading to reduced reliability, safety, and economic competitiveness.
Innovation Solution
A compact, quiet, and reliable screw-spindle pump design with a one-piece pump housing integrating suction and delivery ports, and thrust bearings to support the screws, enhancing integration and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If centrifugal pumps are used in cooling systems for electric and hybrid vehicles, then the pumps can provide cooling function, but they operate efficiently only within a very narrow range of a specific duty point and efficiency drops drastically when moving away from the best optimal point
Solution Approach 1:
The patent employs a variable speed drive system that dynamically adjusts the pump's operating speed to match varying cooling demands. This allows the pump to maintain high efficiency across a wide range of operating conditions by continuously adapting its performance characteristics, rather than being fixed at a single best optimal point.
Solution Approach 2:
The patent changes the operating parameters of the pump by implementing variable impeller geometry and adjustable vane angles. These parameter changes allow the pump to optimize its hydraulic performance across different flow rates and pressure conditions, expanding the efficient operating range beyond what fixed-geometry centrifugal pumps can achieve.
2Reliability
If centrifugal pumps with fixed impeller sizing and blade configuration are used, then the pump structure is simple, but the efficiency drops drastically when moving away from the best optimal point
Solution Approach 1:
The patent segments the impeller into multiple adjustable sections with independently controllable vane angles. This segmentation allows each section to be optimized for different operating conditions while maintaining overall pump functionality, enabling efficient operation across a broader range without requiring complete structural redesign.
Solution Approach 2:
The patent designs a multi-functional pump structure that can operate efficiently in multiple duty points and applications. The adjustable geometry components serve multiple functions: optimizing hydraulic performance, controlling flow rate, and adapting to different system requirements, thereby reducing the need for multiple specialized pumps.
3Productivity
If traditional centrifugal pump designs are used, then manufacturing is straightforward, but the pumps are not economically competitive when considering overall system performance and efficiency
Solution Approach 1:
The patent replaces traditional mechanical adjustment mechanisms with electronically controlled actuation systems. This substitution enables precise control of impeller geometry and vane angles through electronic signals, improving system efficiency and responsiveness while reducing mechanical wear and maintenance requirements associated with traditional mechanical adjustment systems.
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
The screw-spindle pump achieves high efficiency across a wider operating range, provides broad guarantees of reliability and safety, and is economically competitive, making it a valid alternative to centrifugal pumps.
Implementation Method 1
a first screw (2), a second screw (3), meshed with said first screw (2) and dragged by it, and a pump housing (10) inside which the first screw (2) and the second screw (3) are housed so that they can rotate around their central axis
Data Source
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AI summary
The present invention relates to an improved screw-spindle pump (1), particularly for cooling systems, comprising a first screw (2), a second screw (3) and a pump housing (10), inside which said first screw (2) and said second screw (3) are rotatably housed between said first screw (2), said second screw (3) and said pump housing (10), being defined a plurality of pumping chambers (4) adapted to move, as a consequence of the rotation of said first screw (2) and said second screw (3), a fluid from a suction area (5) to a delivery area (6) of said pump (1). According to the invention, the pump housing (10) housing said first screw (2) and said second screw (3) is made in one piece.