Valve Arrangement Axial Bracing High Pressure Pump
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Solution Overview
Problem
High pressure pump valve arrangements in common rail systems face challenges in reliable fastening and disassembly, often resulting in assembly-induced damage to sealing rings and requiring complex integration processes that complicate testing and maintenance.
Innovation Solution
A valve arrangement featuring a pump housing with a depression and a valve housing that can be inserted and secured using a clamping disk with a thread, allowing for axial bracing without rotational movement, which prevents damage to sealing rings and enables compact design by distributing axial forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve housing is integrated directly into the pump using pressing and welding operations, then the valve arrangement achieves high reliability and compact design, but the entire pump becomes a reject in the case of malfunctions of the valve, and testing can only be performed directly in the pump
Solution Approach 1:
The valve arrangement is segmented into a valve housing that can be separately attached to the pump housing via a central thread, allowing the valve to be replaced independently without replacing the entire pump. This segmentation enables the valve to be tested separately before installation and facilitates easier repair and maintenance.
2Ease of repair
If a central thread is used to attach the valve to the high pressure pump, then the valve can be disassembled, but the valve housing experiences rotational/translational movement during assembly and can become jammed or damaged
Solution Approach 1:
A sealing ring is introduced as an intermediary element between the valve housing and the pump housing. The sealing ring accommodates the rotational and translational movements during assembly, preventing direct contact and potential damage between the valve housing and pump housing, while still enabling the threaded connection for disassembly.
3Reliability
If sealing rings are used on the valve housing with a central thread arrangement, then sealing is achieved, but the valve housing can become jammed or damaged during assembly due to rotational/translational movement
Solution Approach 1:
The sealing ring is designed with sufficient radial clearance and flexibility to cushion against the rotational and translational movements that occur during assembly. This beforehand cushioning prevents the sealing ring from being damaged by excessive stress or misalignment, while still ensuring reliable sealing when the valve is properly assembled.
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
This solution enables reliable fastening and disassembly of the valve arrangement, prevents assembly-induced damage to sealing rings, and allows for a compact design while maintaining the integrity of the sealing action, facilitating easier testing and maintenance of high pressure pump components.
Implementation Method 1
The clamping disk has a thread on the circumferential side, which thread can be screwed into a thread on the inner side of the depression in such a way that the valve housing is braced in the pump housing via the clamping disk
Implementation Method 2
The valve housing has an annular ring groove which is arranged on the circumferential side in a cylindrical section and in which a sealing ring is arranged
Data Source
AI summary
A valve arrangement for a high pressure pump includes a pump housing with a depression, and a valve housing configured to be inserted in the depression, and a clamping disc. The valve housing has at least one radial projection with a first axial boundary surface and a second axial boundary surface arranged opposite the first axial boundary surface, wherein the clamping disc extends radially over the radial projection of the valve housing and has a third axial boundary surface that corresponds with the second axial boundary surface of the valve housing. On the circumferential side, the clamping disc has a thread that can be screwed into a thread on the inner side of the depression to brace the valve housing onto the first boundary surface.