Control Valve Unit Collar Design Prevents Separator Plate Cracking
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Solution Overview
Problem
Conventional control valve units with check valve mechanisms are prone to cracking and deformation due to the plug being fitted into the separator plate, which poses a risk of structural failure under stress.
Innovation Solution
A control valve unit design featuring a collar with a valve port and seat sandwiched between the valve bodies and a separator plate, using a check ball to open and close the valve port by hydraulic pressure, reducing stress on the attachment region and preventing cracking and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plug is fitted into the opening of the separator plate to form a check valve mechanism, then the check valve function is achieved, but cracking and deformation occur at the fitted portions of the separator plate and plug
Solution Approach 1:
A collar is introduced as an intermediary component between the separator plate and the check valve plug. The collar is attached to the separator plate through the opening and provides a mounting structure for the check valve mechanism, thereby preventing direct fitting of the plug into the separator plate which causes cracking and deformation.
Solution Approach 2:
The check valve assembly is segmented into separate functional components: the collar (attached to separator plate), the plug (with valve port and valve seat), and the check ball. This segmentation allows each component to be optimized independently and avoids stress concentration at single fitted joints.
2Productivity
If the check valve mechanism is incorporated using a plug fitted into the separator plate, then oil flow control is achieved, but excessive stress and thermal expansion issues occur
Solution Approach 1:
The collar serves as a mediator that absorbs and distributes thermal expansion stresses and mechanical loads, protecting the separator plate and plug from excessive stress and thermal expansion issues while maintaining proper oil flow control through the check valve mechanism.
3Strength
If a collar is attached to the separator plate through the opening with the check valve mechanism, then cracking and deformation are prevented, but the device complexity increases
Solution Approach 1:
The collar is merged with the check valve plug assembly, where the collar and plug work together as an integrated unit. The collar is attached to the separator plate while the plug (with valve port and valve seat) is positioned within the collar, combining structural support and valve functionality in a unified assembly that reduces overall complexity.
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
The design effectively incorporates a check valve mechanism without risking cracking or deformation, ensuring stable sealing and optimal oil flow control while preventing excessive stress and thermal expansion issues.
Implementation Method 1
a check ball disposed in the second fluid channel to open and close the valve port by being separated from the valve seat and seated on the valve seat by a hydraulic pressure
Data Source
AI summary
A control valve unit including a pair of valve bodies, a separator plate interposed between the pair of valve bodies and provided with an opening, a collar attached to the separator plate through the opening and having a valve port and a valve seat, a check ball separating from the valve seat and seating on the valve seat by hydraulic pressure to open and close the valve port, and a combining part combining the pair of valve bodies to sandwich the collar between an end surface of one of the pair of valve bodies and an end surface of the separator plate.