Self-Leveling Disc Coolant Valve for Low-Torque Fluid Sealing
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Solution Overview
Problem
Traditional rotary valve configurations face challenges in manufacturing surface conditions for a fluid-tight seal, increased torque requirements due to sealing elements, and difficulties in independent testing and servicing within modular coolant systems, limiting their applicability and efficiency.
Innovation Solution
A rotary disc valve with a self-leveling feature that maintains a fluid-tight seal through a co-planar arrangement between the fixed and rotary discs, reducing torque requirements and allowing for easier assembly and maintenance by using a biasing element to ensure alignment and sealing without additional sealing elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing elements are used to establish a fluid-tight seal between the rotary valve body and valve housing, then the sealing effectiveness is improved, but the torque required to rotate the valve body increases
Solution Approach 1:
The patent removes traditional sealing elements (O-rings, gaskets, or other sealing members) from the system. Instead, it relies on the inherent surface finish and geometric precision of the valve body and housing mating surfaces to create the fluid-tight seal. This extraction of the sealing element eliminates the friction and torque penalty associated with compressed sealing materials while maintaining sealing effectiveness through precision engineering of the mating surfaces.
2Ease of manufacture
If the rotary valve is integrated into a modular coolant system, then the ease of manufacturing is improved, but the difficulty of independent testing and servicing increases
Solution Approach 1:
The patent segments the rotary valve assembly from the modular coolant system, allowing the valve to be tested and serviced independently before integration. The valve body is designed as a separate, self-contained unit with accessible test ports and service features, enabling independent validation of sealing and flow control functions. This segmentation maintains the benefits of modular manufacturing while restoring the ability to independently test and service the rotary valve component.
3Reliability
If precision surface conditions are required for the rotary valve body and housing, then the fluid-tight seal is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent changes the surface finish parameters of the valve body and housing mating surfaces to optimize sealing performance. By specifying appropriate Ra (roughness average) values and surface preparation methods during manufacturing, the design achieves reliable sealing without requiring overly complex post-processing or specialized sealing components. The parameter optimization balances manufacturing feasibility with sealing reliability.
Data Source
AI summary
A rotary disc valve includes a valve housing having an inner surface defining an opening, a first housing port, a second housing port, and a third housing port. A rotary disc valve assembly is disposed within the opening and includes a fixed disc configured to remain stationary and a rotary disc configured to rotate relative to the fixed disc. The fixed disc includes a first flow opening providing selective fluid communication between the first housing port and the second housing port and a second flow opening providing selective fluid communication between the first housing port and the third housing port. The rotary disc defines a flow passage for distributing a fluid through the first flow opening and/or the second flow opening. A co-planar arrangement is maintained between engaging faces of the fixed disc and the rotary disc to form a fluid-tight seal therebetween.