High-Pressure Pump Relief Valve Guidance for Seat Wear Control
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Solution Overview
Problem
High-pressure pumps with integrated discharge and relief valves experience valve seat wear due to relative movement and vibration, leading to unstable valve position and changing valve opening pressure over time.
Innovation Solution
A high-pressure pump design featuring a support portion that guides the reciprocating movement of the relief valve member, preventing radial oscillation and integrating the relief valve seat with the main body to stabilize its position, thereby reducing wear and maintaining consistent valve opening pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the valve body and holder are formed separately, then the assembly flexibility is improved, but the position stability of the valve body deteriorates
Solution Approach 1:
The valve body and holder are integrated into a single unified component structure. The holder forms an integral part of the valve body, eliminating the separate assembly interface. This merging prevents relative movement between the two components while maintaining manufacturing feasibility through monolithic fabrication or permanent bonding techniques.
2Ease of operation
If the valve body is allowed to move freely in space, then the ease of operation is improved, but the wear of the valve seat accelerates
Solution Approach 1:
A guide structure acts as an intermediary element between the valve body and the valve seat. This guide structure permits the valve body to move freely during normal operation while simultaneously constraining the movement to prevent contact with the valve seat, thereby eliminating wear without restricting operational freedom.
Solution Approach 2:
The spatial domain is segmented into a movement zone and a restricted zone. The valve body is permitted to move freely within the movement zone, while the guide structure establishes a boundary that prevents entry into the restricted zone where the valve seat is located, thus protecting the seat from wear.
3Adaptability or versatility
If the valve body and holder move relative to each other, then the adaptability is improved, but the position stability deteriorates
Solution Approach 1:
The valve body and holder are merged into a single integrated component, eliminating the relative movement interface entirely. This unified structure maintains position stability while preserving the necessary adaptability through the overall valve assembly's ability to respond to pressure changes and operational requirements.
Data Source
AI summary
In a high-pressure pump, a relief valve seating surrounds an opening of a relief valve passage of a valve seat main body in a first space, A relief valve member includes a relief valve main body and a relief valve seat portion. The relief valve main body has a rod shape. The relief valve seat portion is integrated with an end of the relief valve main body so as to be capable of contacting the relief valve seat. The relief valve urging member urges the relief valve member toward the relief valve seat. A support portion includes a support main body that slidably supports an outer wall of the relief valve main body so as to guide a reciprocating movement of the relief valve member in the axial direction.