Pressure Limiting Valve Segmentation for Torque Coupling
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Solution Overview
Problem
Existing torque-limiting safety couplings face challenges in achieving precise fluid pressure control due to the difficulty in controlling the reseating pressure of pressure relief valves, leading to variability in the final enclosed fluid pressure, which is critical for preventing damage to torque-transmitting shafts.
Innovation Solution
A torque-limiting safety coupling with a pressurization device that includes a unidirectional check valve and a pressure-limiting valve, where the pressure-limiting valve opens at a predetermined pressure to drain fluid from the pump connection seat, causing the check valve to close and maintain the fluid pressure at the desired level, ensuring accurate control of fluid pressure in the enclosed space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure relief valve is used to control fluid pressure in the enclosed space, then the opening pressure can be set accurately, but the closing or reseating pressure becomes difficult to control, resulting in considerable variation in the final enclosed fluid pressure
Solution Approach 1:
The pressure control function is segmented into two distinct valves: a pressure relief valve for accurate opening pressure control and a check valve for precise closing pressure control. This segmentation allows each valve to be optimized for its specific function, with the check valve ensuring the enclosed space maintains the exact desired pressure by preventing backflow when the relief valve closes.
Solution Approach 2:
The check valve acts as an intermediary component between the pressure relief valve and the enclosed space. It mediates the pressure control process by allowing fluid to enter the enclosed space while preventing reverse flow, thereby ensuring that the final enclosed pressure matches the predetermined value regardless of the relief valve's closing pressure variations.
2Ease of operation
If manual or compressed air pumps are used to pump fluid into the gap, then fluid can be filled into the enclosed space, but the pulsating fluid flow makes it difficult to achieve precise pressure control
Solution Approach 1:
The check valve serves as an intermediary that smooths out the pulsating flow from manual or compressed air pumps. By allowing unidirectional flow into the enclosed space while preventing backflow during pressure peaks, it converts the pulsating input into a stable enclosed pressure, enabling precise pressure control despite the simplicity of the pumping method.
3Reliability
If the pressure relief valve opens to release excess pressure, then the fluid pressure can be limited, but the uncertainty in when the valve closes creates variability in the final enclosed fluid pressure
Solution Approach 1:
The pressure control timing is segmented into two distinct events handled by separate valves: the pressure relief valve handles the opening event at the predetermined pressure, while the check valve controls the closing event. This segmentation eliminates the timing uncertainty associated with relief valve reseating, as the check valve's closing is determined by the pressure differential rather than spring force variations.
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 provides improved accuracy and control over fluid pressure in enclosed spaces, ensuring that the torque-limiting safety coupling operates within predetermined parameters, reducing the risk of damage to torque-transmitting shafts and enhancing precision in industrial applications.
Implementation Method 1
a unidirectional check valve (4) arranged between the pump connection seat (3) and the enclosed space and configured to allow flow of fluid from the pump connection seat (3) to the enclosed space
Implementation Method 2
a pressure-limiting valve (5) having an inlet arranged in fluid communication with the pump connection seat (3) and configured to open at the predetermined pressure and to drain fluid from the pump connection seat (3) through the pressure limiting valve (5)
Implementation Method 3
a pump connection seat (3) arranged in fluid communication with the enclosed space and adapted to removably receive a nozzle of a fluid pump therein
Data Source
Figure 1~2
AI summary
A device for filling and pressurisation of fluid in an enclosed space (2) at a predetermined pressure, comprising a pump connection seat (3) arranged in fluid communication with the enclosed space and adapted to receive a nozzle of a fluid pump therein; a unidirectional check valve (4) arranged between the pump connection seat and the enclosed space and configured to allow flow of fluid from the pump connection seat to the enclosed space; and a pressure-limiting valve (5) arranged in fluid communication with the pump connection seat and configured to open at the predetermined pressure, whereby the check valve immediately closes to enclose the fluid in the enclosed space at the predetermined pressure.