Hydraulic Valve Actuator Assembly for Pressure Balance and Low Drag
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Solution Overview
Problem
Existing actuators for controlling fluid in valve assemblies are not reliable and efficient during operation, particularly in environments with varying pressure conditions.
Innovation Solution
A valve actuator assembly with a hydraulic cylinder, piston, spring lifter assembly, and internal pressure compensator, which maintains pressure equilibrium and reduces friction and drag by positioning the spring within a recess and coupling the hydraulic cylinder directly to the bonnet, ensuring a rigid construction and minimal vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the spring is positioned within a recess and the hydraulic cylinder is coupled directly to the bonnet, then the construction becomes rigid with minimal vibration, but the device complexity increases
Solution Approach 1:
The spring is positioned within a recess formed in the bonnet, nesting the spring housing within the existing bonnet structure. This eliminates the need for a separate spring housing component while maintaining the rigid construction and minimal vibration characteristics. The recess integrates the spring mounting function into the bonnet itself, reducing overall device complexity despite the rigid construction requirements.
2Reliability
If the internal pressure compensator is added to maintain pressure equilibrium, then the reliability improves under varying pressure conditions, but the device complexity increases
Solution Approach 1:
The internal pressure compensator is designed to automatically maintain pressure equilibrium between the hydraulic cylinder and the surrounding environment. The compensator uses the existing hydraulic fluid and pressure differential to self-regulate, eliminating the need for external pressure control systems or additional power sources. This self-service mechanism improves reliability under varying pressure conditions while minimizing the increase in device complexity by utilizing already-present system components.
3Loss of energy
If the hydraulic cylinder is coupled directly to the bonnet, then friction and drag are reduced, but the manufacturing precision requirements increase
Solution Approach 1:
The hydraulic cylinder is coupled directly to the bonnet, merging these two components into a integrated assembly. This eliminates intermediate mounting brackets, fasteners, and alignment features that would otherwise introduce friction and drag. The direct coupling reduces the number of interfaces and contact points, thereby reducing energy loss through friction while concentrating manufacturing precision requirements into the cylinder-bonnet interface itself.
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 provides a more reliable and efficient actuator operation by minimizing friction, maintaining pressure balance, and reducing vibration, even in varying external pressures, enhancing the actuator's performance and longevity.
Implementation Method 1
A spring is positioned within the actuator housing having a first end and a second end, the first end being coupled to a lower surface of the housing lid, and the second end being coupled to the spring lifter assembly
Implementation Method 2
A hydraulic cylinder is positioned within the actuator housing and coupled to the bonnet and a piston is positioned within the hydraulic cylinder
Data Source
AI summary
A valve actuator assembly having an actuator housing coupled to a bonnet and a housing lid. A hydraulic cylinder is positioned within the actuator housing and directly coupled to the bonnet. A piston is positioned within the hydraulic cylinder and coupled to a spring lifter assembly and a spring is positioned within the actuator housing and having a first end and a second end, the first end being coupled to a lower surface of the housing lid, and the second end being coupled to the spring lifter assembly. An operating stem is coupled to the piston and positioned in a channel extending through the bonnet to a valve body assembly.