Multi-Channel Control Valve Sealing for Stable Core Rotation
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Solution Overview
Problem
Existing control valves face challenges in maintaining the stability of fluid control for multiple flow paths and achieving improved sealing performance, particularly in arranging multiple flow passages and sealing members effectively.
Innovation Solution
The control valve design includes a valve body, valve core, and sealing member, with a balance sealing block arranged between the side wall and valve core. The sealing member has an arc-shaped cross-section, providing a large expansion space and lower manufacturing precision, while the balance sealing block applies forces opposite to those applied by the sealing member, ensuring the valve core remains coaxial with the side wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If an annular structure is used for the sealing member cross-section, then the sealing member has sufficient structural strength, but the expansion space is limited and manufacturing precision requirements are high
Solution Approach 1:
The sealing member cross-section is designed as an arc-shaped structure instead of a conventional annular structure. This curvature design provides a larger expansion space while reducing manufacturing precision requirements, as the arc shape naturally accommodates thermal expansion and deformation more effectively than a rigid annular form.
2Force
If the valve core is pressed against the sealing member without balance, then sealing force is sufficient, but the valve core becomes eccentric and rotation stability deteriorates
Solution Approach 1:
A balance sealing block is introduced to counterbalance the sealing member. The balance sealing block applies a force in the opposite direction to the sealing member's force on the valve core, creating a balanced force system that prevents valve core eccentricity while maintaining sufficient sealing force through the sealing member.
3Adaptability or versatility
If multiple flow passages are arranged in the valve body, then fluid control of multiple flow paths is achieved, but the arrangement complexity and sealing difficulty increase
Solution Approach 1:
The balance sealing block serves multiple functions: it counterbalances the sealing member to maintain valve core coaxiality, seals the flow passages between the valve core and valve body, and simplifies the overall arrangement of multiple flow passages. This multi-functional design reduces the complexity of arranging multiple flow passages while achieving versatile fluid control.
Data Source
AI summary
A control valve is provided, which comprises a valve body, a valve core, a sealing component and a balance sealing block. The control valve comprises at least five channels. A side wall part is provided with at least five communication ports. The communication ports are in communication with a valve cavity. A sealing body part of the sealing component is positioned between the valve core and the side wall part. The sealing body part is provided with through holes penetrating through the sealing component. In the region of the side wall part that in contact with the sealing body part, the number of communication ports is the same as the number of through holes, and the communication ports and the through holes are in communication correspondingly.