Centrifugal Pump Variable Blade-Free Space for Clogging Prevention
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Solution Overview
Problem
Centrifugal pumps face challenges in efficiently conveying media with solid admixtures without clogging, while maintaining high efficiency and cost-effectiveness, as existing solutions often require complex and expensive adjustments to the impeller position or vane-free space.
Innovation Solution
A centrifugal pump design featuring a variable blade-free space arrangement on the suction side, adjustable through an elastic or movable mechanism, allowing for stepless adjustment of the impeller's clearance to accommodate different media and prevent blockages, without requiring impeller position changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the blade-free space is increased to prevent clogging, then the pump can handle larger solid particles, but the pump efficiency decreases
Solution Approach 1:
The suction-side housing part is made movable relative to the impeller, allowing the blade-free space to be dynamically adjusted. This enables the system to adapt the gap width between the suction-side housing wall and the impeller to optimize both clogging prevention and pump efficiency based on operating conditions.
Solution Approach 2:
The invention changes the geometric parameter of the blade-free space by making the suction-side housing part movable. This allows continuous adjustment of the gap width, enabling optimization of the balance between handling solid particles and maintaining pump efficiency.
2Productivity
If the impeller chamber is reduced to increase efficiency, then the pump efficiency improves, but the risk of blockages increases
Solution Approach 1:
The movable suction-side housing part enables dynamic adjustment of the blade-free space, allowing the system to optimize the balance between efficiency and clogging resistance. When efficiency is prioritized, the gap is reduced; when clogging prevention is needed, the gap is increased.
Solution Approach 2:
The invention allows continuous adjustment of the geometric parameters of the impeller chamber by moving the suction-side housing part, enabling optimization of the balance between chamber size for efficiency and sufficient space for clogging prevention.
3Adaptability or versatility
If the impeller position is adjusted to vary the blade-free space, then the pump can adapt to different media, but the device complexity and cost increase
Solution Approach 1:
Instead of moving the entire impeller assembly, the invention extracts and isolates only the suction-side housing part as the movable element. This simplifies the adjustment mechanism by moving only the necessary component to vary the blade-free space, reducing overall system complexity.
Solution Approach 2:
The pump housing is segmented into a stationary part and a movable suction-side housing part. This segmentation allows independent adjustment of the suction-side section to vary the blade-free space without affecting the impeller position or requiring complex overall impeller displacement mechanisms.
4Ease of manufacture
If a fixed blade-free space is used, then the manufacturing cost is lower, but the pump cannot efficiently handle varying solid content in different media
Solution Approach 1:
The invention introduces minimal dynamic complexity by making only the suction-side housing part movable, allowing the blade-free space to be adjusted for different media while keeping the overall structure relatively simple and cost-effective to manufacture.
Solution Approach 2:
The invention enables adjustable geometric parameters of the blade-free space through the movable suction-side housing part, allowing optimization for different solid content conditions while maintaining a simple and cost-effective manufacturing approach compared to moving the entire impeller.
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
Ensures reliable conveyance of media with solid admixtures, maintaining high efficiency and preventing clogging by adaptively adjusting the blade-free space based on the medium's characteristics, with the option to automatically detect and respond to blockages.
Implementation Method 1
The arrangement (13) comprises an elastic wall (28) for adjusting the space (10)
Implementation Method 2
The hollow body (27) has a connection (29) through which a filling fluid can be supplied or discharged
Data Source
Figure 1
AI summary
The invention relates to a centrifugal pump (1) for delivering a medium comprising solid admixtures. A blade-free space (9) is arranged in front of an impeller (1). The centrifugal pump has a suction-sided arrangement (12). The space (9) can be increased and/or reduced by means of the arrangement (12).