Filter Backwash Cleaning Head with Rotor-Driven Contact Force
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Solution Overview
Problem
Conventional filter cleaning heads face issues with excessive wear and pressure differential management, leading to inefficient cleaning and potential damage to filter elements due to inadequate contact maintenance and pressure equalization mechanisms.
Innovation Solution
A filter cleaning head with a rotor-based nozzle system that generates torque from backwash fluid flow, converting it into linear force to maintain contact with the filter element, reducing wear and eliminating the need for pressure equalization mechanisms, and using a screw thread arrangement to adjust for varying pressure differentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a conventional filter cleaning head uses spring or bellows mechanisms to maintain contact with the filter wall, then the cleaning head can apply force to the filter surface, but the mechanisms suffer from excessive wear, deformation, and require constant adjustment or pressure equalization
Solution Approach 1:
The patent replaces static spring or bellows mechanisms with a dynamic rotor-based system. The rotor rotates in response to pressure differential changes, dynamically adjusting the cleaning head's contact force with the filter wall. This eliminates wear from elastic deformation while maintaining adaptive contact pressure through rotational movement driven by pressure changes.
2Object-affected harmful factors
If pressure equalization mechanisms are added to prevent excessive force on the filter wall, then filter element damage is reduced, but device complexity increases
Solution Approach 1:
The rotor acts as a self-regulating mechanism that automatically responds to pressure differential changes. When pressure increases, the rotor rotates to reduce contact force; when pressure decreases, the rotor returns to maintain contact. This self-service behavior eliminates the need for external pressure equalization mechanisms while protecting the filter element from damage.
3Stability of the object's composition
If spring or bellows mechanisms are used to hold the cleaning head against the filter wall, then contact is maintained, but the mechanisms require constant adjustment or replacement due to wear and deformation
Solution Approach 1:
The patent replaces the mechanical spring/bellows system with a fluid-driven rotor system. Instead of relying on elastic materials that wear and deform, the cleaning head contact force is generated by fluid pressure acting on the rotor blades, converting a wear-prone mechanical system into a fluid-driven system with significantly extended service life.
4Productivity
If the cleaning head is held against the filter wall with sufficient force to maintain contact under high pressure differential, then cleaning effectiveness is improved, but excessive force is applied during normal operation causing wear and deformation
Solution Approach 1:
The rotor system changes the operating parameter from static contact force to dynamic rotational response. During normal operation, the rotor remains stationary with minimal contact force. During backwashing when pressure differential increases, the rotor rotates to engage the cleaning function. This parameter change allows effective cleaning only when needed while minimizing wear during normal operation.
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 rotor-based system ensures consistent and efficient cleaning with reduced wear on filter elements, maintaining effective contact without excessive force or pressure equalization issues, enhancing the overall filtration process by minimizing process fluid loss and extending the lifespan of cleaning components.
Implementation Method 1
a rotor (3) for generating a torque when exposed to the flow of backwash fluid
Implementation Method 2
the torque generated by the rotor is converted by a screw thread arrangement into a linear force and/or movement
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2
AI summary
A cleaning head for a filter backwashing mechanism, the cleaning head comprising: a nozzle for contact with a filter element wall 1 and for receiving a flow of backwash fluid 8, 9, wherein the nozzle comprises a rotor 3 for generating a torque when exposed to the flow of backwash fluid 8,9, and wherein the cleaning head is arranged such that at least a part of the nozzle will move toward and/or apply a force to the filter element wall 1 as a result of the torque generated by the rotor 3.