Compact Filter Device with Post-Suctioning Backwashing
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Solution Overview
Problem
Existing filter devices for hydraulic systems are bulky and inefficient in backwashing due to the need for high fluid input quantities and frequent backwashing cycles, which compromises their compactness and effectiveness, especially when dealing with high viscosity fluids like hydraulic oil.
Innovation Solution
A compact filter device with a single filter element and a pressure control system that uses post-suctioning to efficiently backwash the filter element, reducing fluid input quantity and enhancing cleaning effectiveness through a combination of axial and radial flow acceleration and pressure shock, allowing for consecutive filtration and backwashing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple filter elements are used in a large filter device with offset arrangement on a pitch circle, then the filtration capacity and backwashing capability are improved, but the device size and complexity increase significantly
Solution Approach 1:
The filter element is divided into multiple sections (first, second, third, and fourth sections) arranged axially, with each section having alternating filtration and backwashing flow directions. This segmentation allows the single filter element to perform both filtration and backwashing functions that previously required multiple filter elements, reducing device size while maintaining productivity.
Solution Approach 2:
The single filter element is designed with multi-directional flow capability, where different sections handle different functions: some sections perform filtration while others perform backwashing simultaneously. The pressure control device can selectively activate different flow paths through different sections, making the single filter element universal for both filtration and backwashing operations.
2Volume of stationary object
If a single filter element is used to reduce device size, then the device becomes more compact, but the filtration capacity and backwashing effectiveness are reduced
Solution Approach 1:
The filter element incorporates dynamic flow control through the pressure control device, which can switch flow directions and activate different sections based on operational needs. The flow paths are dynamically adjustable, allowing the system to optimize filtration capacity and backwashing effectiveness for different contamination levels and fluid conditions.
Solution Approach 2:
The filter element operates in periodic cycles where different sections are alternately activated for filtration and backwashing. The pressure control device periodically switches between filtration mode and backwashing mode, with different sections taking turns performing each function, thereby maintaining overall system productivity while using a single compact filter element.
3Reliability
If high fluid input quantity is used for backwashing, then the cleaning effectiveness is improved, but the fluid consumption and device complexity increase
Solution Approach 1:
The backwashing process applies local quality enhancement by directing high-velocity fluid flow specifically to sections of the filter element that require cleaning, rather than uniformly flooding the entire element. The pressure control device creates localized high-pressure zones that effectively remove contamination with minimal overall fluid consumption.
Solution Approach 2:
The system changes fluid flow parameters (velocity, pressure, direction) dynamically during backwashing. The pressure control device increases fluid velocity and pressure selectively in active backwashing sections while maintaining lower parameters in other sections, achieving effective cleaning with reduced total fluid input quantity.
4Reliability
If high viscosity fluids like hydraulic oil are filtered, then the separation capability is improved, but the backwashing difficulty and fluid input requirement increase
Solution Approach 1:
The pressure control device provides dynamic adaptation to high viscosity fluids by adjusting flow paths and pressures in real-time. The system can switch between different flow configurations optimized for high-viscosity backwashing, using the axial and radial flow acceleration capabilities to overcome viscosity-related resistance without requiring excessively high fluid input quantities.
Solution Approach 2:
The system utilizes hydraulic principles to generate the necessary pressure shocks and flow acceleration for backwashing high viscosity fluids. The pressure control device creates controlled hydraulic shocks and utilizes fluid momentum to effectively clean the filter element, reducing the need for complex mechanical backwashing 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 solution enables a space-efficient, cost-effective, and reliable filtration and backwashing process with a single filter element, maintaining high separation rates and extending filter element service life, even with high viscosity fluids, by minimizing fluid input and maximizing return flow velocity for effective contamination removal.
Implementation Method 1
a post-suctioning effect can be generated to improve the cleaning of the particle contamination on the filter element to be backwashed
Implementation Method 2
a type of pressure shock with an improved cleaning effect is generated on the respective filter element to be backwashed
Data Source
AI summary
A filter device (10) includes a filter element (12) in a filter housing (14) with fluid connection points (16, 18) for the non-filtrate and filtrate. Fluid can be passed through the filter element in both directions for filtrating the non-filtrate or for backwashing for cleaning particle contaminations (72). A pressure control (36) generates a post-suctioning effect to improve the cleaning of the particle contaminations (72). The filter device (10) is designed as a one filter-element solution. In a predetermined exchange, the single filter element (12) for filtering can be used for backwashing or can be backwashed using the pressure control device (36). A hydraulic system (64) and a method for backwashing a filter element (12) of a filter device (10) is provided.