Servo Valve Chimney O-Ring Sealing for Easier Assembly
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Servovalves face challenges with complex and expensive components, vulnerable seals prone to leakage, and difficult assembly and calibration, necessitating an improved sealing mechanism to enhance reliability and manufacturing efficiency.
Innovation Solution
A servovalve design featuring a torque motor section with opposing pole pieces and permanent magnets, an armature/flapper assembly, and a hydraulic section with a chimney section and torsion bridge, utilizing an O-ring or other sealing means positioned on the exterior surface of the chimney section to create a robust seal between the torque motor and hydraulic sections, allowing for easier manufacturing and assembly with wider tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing means are used in servovalves, then the structure is simpler to manufacture, but the seals are vulnerable to leakage and require tight tolerances
Solution Approach 1:
The sealing means is repositioned from the traditional location to the exterior surface of the chimney section at its first end, where it contacts both the inner surface of the torsion bridge and the outer surface of the chimney section. This dimensional relocation allows the seal to be installed in a more accessible location with larger clearance, reducing manufacturing precision requirements while improving sealing reliability.
2Reliability
If complex sealing mechanisms are implemented, then leakage is reduced, but the device becomes more complicated and expensive
Solution Approach 1:
The torsion bridge serves multiple functions: it provides mechanical support for the flapper assembly, enables rotational movement, and acts as a sealing surface by contacting the sealing means. This multi-functionality reduces the need for separate sealing components, simplifying the overall structure while maintaining effective leakage prevention.
3Ease of manufacture
If traditional seal positions are used, then the structure is more compact, but assembly and calibration become difficult
Solution Approach 1:
The sealing means is pre-positioned in a groove or recess on the exterior surface of the chimney section before final assembly. This preliminary placement allows the seal to be correctly positioned without requiring complex alignment procedures during assembly, making the assembly process easier while maintaining a compact structure.
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 improved sealing mechanism reduces leakage, simplifies manufacturing and assembly, and provides a more reliable seal, making the servovalve more cost-effective and efficient while maintaining performance.
Implementation Method 1
first and second permanent magnets may be positioned between these first and second pole pieces
Implementation Method 2
torque motor section may comprise first and second opposing pole pieces and first and second permanent magnets may be positioned between these first and second pole pieces
Implementation Method 3
The sealing means is positioned on the outer surface of the chimney section at its first end. The torsion bridge is also provided around the sealing means so that the sealing means contacts both an inner surface of the torsion bridge and the outer surface of the chimney section
Data Source
AI summary
A servovalve includes a torque motor section and a hydraulic section. The torque motor section may comprise first and second opposing pole pieces and first and second permanent magnets may be positioned between these first and second pole pieces. The torque motor section also comprises an armature/flapper assembly which comprises a torsion bridge, an armature plate and a flapper that is connected at a first end to the armature plate. The flapper extends from said armature plate along a first longitudinal axis X. The armature plate may extend between the first and second permanent magnets and along a second longitudinal axis Y that is perpendicular to the first axis X. The hydraulic section comprises: a housing that comprises a body section and a chimney section. The chimney section extends from the body section to a first end.