Centrifugal Pump Suction Strainer Switching for Flushing and Flat Suction
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Solution Overview
Problem
Existing centrifugal pumps are not optimally adaptable to different application situations, leading to inefficiencies and potential blockages due to solids settling in the impeller and pump housing, which affects hydraulic and mechanical performance.
Innovation Solution
A centrifugal pump design featuring a rotatable and axially displaceable centrifugal chamber and suction strainer, allowing for various operating modes, including normal operation, flat suction, and flushing functions, without requiring manual conversion or tools, through adjustable suction openings and bypass lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the centrifugal pump uses a fixed suction strainer and centrifugal chamber design, then the structure is simple, but it cannot adapt to different operating conditions and application situations
Solution Approach 1:
The suction strainer and centrifugal chamber are designed to be rotatable and axially displaceable relative to each other, transforming a static structure into a dynamic one. This allows the pump to adapt to different operating conditions by changing the relative position between these components, enabling features like flat suction mode and flushing function without requiring multiple separate devices.
Solution Approach 2:
The pump system integrates multiple functions within a single device by allowing the suction strainer and centrifugal chamber to assume different relative positions. These positions enable normal operation mode, flat suction mode, and flushing function, making one device capable of performing multiple operations that would otherwise require separate equipment.
2Adaptability or versatility
If the pump operates with solids in the liquid, then it can handle raw waste water, but solids settle in the impeller and pump housing causing reduced efficiency and potential blockages
Solution Approach 1:
The flushing function allows fluid to flow through the suction strainer and centrifugal chamber before normal operation begins. This preliminary action removes settled solids and deposits from the impeller and pump housing, preventing them from causing blockages or reducing efficiency during subsequent pumping operations.
Solution Approach 2:
The pump system uses its own conveyed fluid to perform the flushing function. By directing fluid through the bypass line back through the suction strainer and centrifugal chamber, the system cleans itself without requiring external cleaning equipment or additional energy input beyond the normal pumping operation.
3Adaptability or versatility
If the pump requires manual conversion to change operating modes, then the structure can be simple, but it takes time and effort to adapt to different application situations
Solution Approach 1:
The system uses dynamic adjustment through rotation and axial displacement of the suction strainer and centrifugal chamber to change operating modes. This mechanical adjustability allows operators to switch between normal operation, flat suction, and flushing functions quickly without manual conversion procedures, reducing downtime and increasing operational flexibility.
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
Enables easy adaptation to different operating conditions, optimizes pump performance, and facilitates quick removal of deposits, enhancing hydraulic and mechanical efficiency while preventing blockages.
Implementation Method 1
Centrifugal pumps are known from the prior art and are used to convey a liquid as fluid by means of a rotary movement of an impeller
Implementation Method 2
the centrifugal chamber and the suction strainer are rotatable and/or axially displaceable relative to one another into at least a first, a second and a third position
Implementation Method 3
at least one bypass line connectable to the at least one pressure outlet for purging the centrifugal pump and/or the suction strainer
Data Source
AI summary
A centrifugal pump includes an impeller defining an axis for conveying a fluid, a centrifugal chamber, into which the impeller is axially inserted, and a suction strainer, into which the centrifugal chamber is axially inserted, wherein the centrifugal chamber has at least one pressure outlet leading from the impeller to the suction strainer for receiving a portion of the fluid conveyed by the impeller, the suction strainer has at least one base-side and at least one lateral suction opening for sucking in the fluid and at least one bypass line, connectable to the at least one pressure outlet, for purging the centrifugal pump and/or the suction strainer, and the centrifugal chamber and the suction strainer are rotatable and/or axially displaceable relative to one another in at least a first, a second and a third position, in such a way that at least in the first position the at least one lateral suction opening is open, in the second position the at least one lateral suction opening is deactivated and in the third position the at least one pressure outlet is connected to the at least one bypass line.