Bladder Accumulator Volume Indicator for Mechanical Seal Systems
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Solution Overview
Problem
Existing methods for determining the volumetric level of barrier fluid in mechanical seal pressure vessels, such as those in API Plan 53B systems, are costly and complex due to reliance on pressure and temperature transmitters, which can be inaccurate and require ATEX approval, making them difficult to implement effectively.
Innovation Solution
A mechanical seal support system with a bladder accumulator connected to pressure-responsive means that display the fluid volume relative to a predetermined volume, using manifolds for interference without depressurizing the system, and transmitting output for fluid replenishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure transmitters are used to monitor barrier fluid level, then the monitoring function is provided, but the cost increases and ATEX approval is required
Solution Approach 1:
The patent replaces electrical pressure transmitters with a purely mechanical differential pressure indication system. The indicator device uses mechanical elements (springs, diaphragms, float mechanisms) to convert pressure differences into direct visual readings, eliminating the need for electrical components and ATEX approval while maintaining reliable monitoring functionality
Solution Approach 2:
The invention creates a mechanical copy of the pressure measurement function through a differential pressure indicator that replicates the monitoring capability of electronic transmitters using mechanical means. The indicator board with visual scales and pointers provides a simplified copy of the information that electronic systems would provide
2Measurement precision
If pressure and temperature transmitters are used, then accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines the functions of pressure and temperature compensation into a single integrated mechanical indicator device. The differential pressure mechanism inherently compensates for temperature effects on barrier fluid density, eliminating the need for separate temperature transmitters and complex algorithmic corrections while maintaining measurement accuracy
Solution Approach 2:
The invention introduces a mechanical intermediary system (differential pressure indicator with reference pressure connection) that mediates between the barrier fluid pressure and the indication mechanism. This intermediary provides accurate measurement without requiring direct electronic sensing, simplifying the overall system while maintaining precision
3Extent of automation
If individual single loop controllers are used, then the control function is provided, but the implementation difficulty increases
Solution Approach 1:
The mechanical indicator device is designed to be self-explanatory and self-operating, requiring no complex control logic or programming. The direct mechanical linkage between pressure and indication provides intuitive, automatic operation that eliminates implementation difficulties associated with configuring and maintaining electronic control 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
Provides an accurate and cost-effective means to monitor and maintain the barrier fluid level, reducing the risk of contamination and premature seal failure, while being easier to implement and maintain than existing solutions.
Implementation Method 1
means responsive to the pressures at each of said connections and for providing an output determined by the difference between said pressures
Data Source
AI summary
A mechanical seal support system includes a bladder accumulator with a first connection to the top of the bladder accumulator and a second connection to the bottom of the bladder accumulator with a device that is responsive to the pressures at each of the first and second connections of the bladder accumulator for providing an output determined by the difference between the pressures. The mechanical seal support system further includes a display for displaying the output in a manner indicative of the volume of the fluid in the bladder accumulator relative to a predetermined volume.