Rotary Nozzle Control Sleeve Design for Filter Backwash
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Solution Overview
Problem
Existing control devices for rotary nozzles used in filter devices to backwash gas filters suffer from manufacturing tolerances leading to misalignment, material fatigue, high friction, and complex structures resulting in increased production costs and reduced functionality.
Innovation Solution
Designing the control sleeve with identical end sections and a middle section that is radially spaced from the feed tube, using a brass alloy for reduced friction, and allowing the baffle plate to be movably attached to compensate for positional deviations, thereby simplifying assembly and reducing wear and friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control device is designed with a complex structure to ensure precise control, then the control precision is improved, but the device complexity increases and production costs rise
Solution Approach 1:
The patent combines the control sleeve, piston, and baffle plate into a single integrated assembly. The control sleeve serves dual functions as both a guide for the piston and a mounting structure for the baffle plate, eliminating the need for separate control components and reducing overall device complexity while maintaining control precision
Solution Approach 2:
The control sleeve is designed with identical end sections that can each serve as mounting positions for the baffle plate. This universal design allows the same structural element to fulfill multiple potential control configurations, simplifying the overall device structure while providing precise control capabilities
2Stability of the object's composition
If the baffle plate is rigidly fixed to the feed tube, then the structural stability is improved, but the material fatigue increases due to misalignment from manufacturing tolerances
Solution Approach 1:
The baffle plate is designed to be movably mounted on the control sleeve rather than rigidly fixed to the feed tube. This dynamic mounting allows the baffle plate to adjust its position slightly to accommodate manufacturing tolerances, preventing stress concentration and material fatigue while maintaining adequate structural stability for control functionality
Solution Approach 2:
The control device is designed with built-in compensation mechanisms that anticipate and accommodate manufacturing tolerances before they cause damage. The movable mounting and identical end sections are pre-configured to absorb alignment variations, preventing misalignment-induced fatigue before it occurs
3Stability of the object's composition
If the control sleeve is supported along its entire length on the feed tube, then the guidance stability is improved, but the friction increases leading to impaired functionality
Solution Approach 1:
The control sleeve is designed with identical end sections that are the only areas of contact with the feed tube. The middle section is deliberately separated from the feed tube, creating discrete contact zones rather than continuous contact. This segmentation provides adequate guidance stability at the endpoints while minimizing friction along the length of the control sleeve
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 enhances the reliability and longevity of the control device by reducing friction, wear, and production costs while accommodating manufacturing tolerances, ensuring efficient operation of the rotary nozzle system.
Implementation Method 1
using a brass alloy for reduced friction
Data Source
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AI summary
The present invention relates to a control device (7) of a filter device (1) with a rotary nozzle (9), comprising a base plate (6) having a passage opening (17) for filtered gas, a console (18) attached to the base plate (6) to which a feed tube (21) for supplying backwash medium to the rotary nozzle (9) is attached, a cylinder body (22) with a cylinder (23) attached to the console (18) and/or to the feed tube (21), a piston (26) axially adjustable in the cylinder body (22), a control sleeve (32) axially adjustable and guided on the outside of the feed tube (21), and a baffle plate (35) for controlling the passage opening (17), wherein the control sleeve (32) is connected to the piston (26) in a first end section (33) and to the baffle plate (35) in a second end section (34), wherein the baffle plate (35), the control sleeve (32), and the piston (26) form a unit (36),which is adjustable depending on the pressure difference at the piston (26) between a closed position (S1), in which the baffle plate (35) closes the passage opening (17), and an open position (S2), in which the baffle plate (35) opens the passage opening (17). Simplified manufacturing is achieved if the control sleeve (32) is equipped with identical end sections (33, 34).