Relief Valve Compact Design High-Pressure Pump
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Solution Overview
Problem
Existing relief valve devices for high-pressure pumps face challenges in achieving a compact size while maintaining high relief pressure, as the spring load is limited by the small space for the second urging member, leading to increased size and reduced spring load capacity.
Innovation Solution
The relief valve device incorporates a valve housing with a partition wall, where the first and second urging members contact the partition wall, allowing for a common support member, which enables a compact design and increased relief pressure without significant size increase, even when the urging force is enhanced.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the spring load is increased to achieve higher relief pressure, then the relief pressure increases, but the device size increases due to limited space for the second urging member
Solution Approach 1:
The patent merges the support function for both the first urging member (spring) and the second urging member (piston) into a single common support member (the valve body bottom surface). This integration allows both urging members to share the same support structure, eliminating the need for separate support spaces and enabling higher spring loads without proportionally increasing device volume.
Solution Approach 2:
The patent transitions from a vertical stacking arrangement to a radial distribution arrangement. The first and second urging members are positioned at different radial locations on the valve body bottom surface rather than stacked vertically, allowing both members to utilize the same axial space while maintaining functional independence. This dimensional reorganization resolves the space conflict between the urging members.
2Force
If the space for the second urging member is increased to accommodate higher spring load, then the spring load capacity increases, but the device complexity increases
Solution Approach 1:
The valve body bottom surface serves multiple functions: it acts as the support member for the first urging member (spring), the support member for the second urging member (piston), and the valve seat for the relief valve. This multi-functionality eliminates the need for separate support structures, reducing device complexity while maintaining high spring load capacity.
Solution Approach 2:
The patent combines the support functions for both urging members into a single integrated structure (the valve body bottom surface), reducing the number of separate components and simplifying the overall device structure while accommodating both the spring and piston with sufficient space for high load capacity.
3Volume of moving object
If the relief valve device is made compact to reduce size, then the device volume decreases, but the spring load is limited reducing relief pressure capability
Solution Approach 1:
The patent redistributes the urging members radially across the valve body bottom surface rather than stacking them vertically, allowing both members to coexist within a compact axial envelope. This radial arrangement maintains sufficient space for high spring load capacity while keeping the overall device volume compact.
Solution Approach 2:
By integrating the support functions for both urging members into the single valve body bottom surface structure, the patent eliminates redundant support components, enabling a more compact device design that still accommodates the spring and piston with adequate space for high relief pressure capability.
Data Source
AI summary
A relief valve device includes: a valve housing that includes a communication passage, which communicates between a first pressure chamber and a second pressure chamber, and a relief chamber, which is configured to communicate with the second pressure chamber; a partition wall that is formed in an inside of the valve housing and partitions between the communication passage and the relief chamber; a first valve member that is configured to block and enable flow of fluid between the first pressure chamber and the communication passage; a first urging member that urges the first valve member; a second valve member that is configured to block and enable flow of the fluid between the second pressure chamber and the relief chamber; and a second urging member that urges the second valve member.