Hydraulic Servo Valve Air Bleeding With Redundant Failover
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Solution Overview
Problem
Hydraulic servo control systems face challenges in maintaining system uptime and reliability due to the lack of effective redundancy and online serviceability, leading to potential operational downtime and contamination buildup.
Innovation Solution
The implementation of a redundant hydraulic servo control system with primary and backup servo valves and controllers, along with automatic failover processes and online serviceability features, allows for continuous operation and air bleeding without interrupting active control, and reduces contaminant buildup.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hydraulic systems are used without redundancy, then device complexity is reduced, but system reliability deteriorates due to lack of failover capability
Solution Approach 1:
The hydraulic control system is divided into separate functional modules including primary and backup servo valves, isolation valves, and redundant control paths. This segmentation allows individual components to be maintained or replaced without shutting down the entire system, thereby improving reliability while managing complexity through modular architecture.
Solution Approach 2:
Redundancy is implemented selectively at critical points in the hydraulic system where failure would impact operational continuity. Backup servo valves and isolation valves are positioned strategically to provide local failover capability without duplicating the entire system, thus improving reliability while minimizing the increase in device complexity.
2Productivity
If the system operates continuously without shutdown, then productivity is improved, but harmful factors worsen due to contaminant buildup and air accumulation
Solution Approach 1:
The system enables continuous hydraulic operation by implementing online air bleeding and contamination control functions. Isolation valves allow the hydraulic actuator to remain pressurized and operational while service functions are performed on isolated components, eliminating the need for shutdowns and maintaining continuous productive action.
Solution Approach 2:
The redundant hydraulic system provides self-maintenance capability through integrated air bleeding and contamination control functions that can be performed while the system remains operational. The isolation valves and service ports enable the system to service itself without external intervention or shutdown, removing harmful contaminants during continuous operation.
3Loss of time
If manual air bleeding procedures are used, then device complexity is reduced, but loss of time increases due to operational shutdown requirements
Solution Approach 1:
Isolation valves are pre-positioned and configured to enable immediate isolation of specific hydraulic circuits when air bleeding or service is required. This preliminary arrangement of isolation components allows rapid initiation of air bleeding procedures without the need for system shutdown or complex manual操作流程, significantly reducing the time loss associated with traditional air bleeding methods.
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
This solution enhances system uptime, detects internal faults independently, engages redundant features without external supervision, bleeds residual air, and clears contaminants without interrupting operations, thereby improving reliability and reducing downtime.
Implementation Method 1
The closure member can be configured to flush air residuals trapped in the valve assembly with hydraulic fluid provided to the valve assembly while in the second configuration
Data Source
AI summary
The subject matter of this specification can be embodied in, among other things, a method that includes actuating a closure member at a predetermined first velocity a predetermined first number of cycles between a first configuration and a second configuration, actuating the closure member at a predetermined second velocity a predetermined second number of cycles between the first and the second configuration, actuating the closure member at a predetermined third velocity a predetermined third number of cycles and the second configuration, actuating the closure member at a predetermined fourth velocity a predetermined fourth number of cycles and the second configuration, and actuating the closure member to the second configuration at a predetermined fifth velocity for a predetermined flushing period.