Piston Pump Throttle Element Pre-Centering
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Solution Overview
Problem
Piston pumps face issues with the pre-centering of spring-elastic throttle elements during assembly, which can lead to deformation and jamming, potentially causing system failure due to overloading when the drive is overloaded, especially in high-speed applications like anti-lock braking systems.
Innovation Solution
The implementation of centering means with chamfers on the cover, allowing cost-neutral pre-centering of the throttle element without obstructing its movement, and the use of a spring-elastic disk design that adjusts the flow cross-section based on pressure differences to reduce pulsations and enhance robustness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the throttle element is pre-centered in the cover during assembly, then assembly reliability is improved, but the throttle element movement may be impeded causing system failure
Solution Approach 1:
The patent implements preliminary centering of the throttle element in the cover before the cylinder is pressed onto the cover. Centering means (chamfers) are provided in the cover to automatically center the throttle element during assembly, ensuring proper positioning before the cylinder is installed. This preliminary action prevents deformation during assembly while maintaining operational freedom.
2Productivity
If the cylinder is pressed rapidly onto the cover during assembly, then productivity is improved, but the throttle element may be deformed causing jamming
Solution Approach 1:
The throttle element is pre-centered in the cover using centering means (chamfers) before the cylinder is pressed onto the cover. This preliminary centering action ensures that even during rapid assembly, the throttle element maintains its centered position and is not deformed by the pressing force, allowing high productivity without compromising positioning precision.
Solution Approach 2:
The centering means (chamfers) in the cover provide a cushioning effect that guides and protects the throttle element during the rapid pressing of the cylinder onto the cover. The chamfers distribute the pressing force and prevent concentrated loads that could deform the throttle element, enabling fast assembly while maintaining manufacturing precision.
3Device complexity
If no centering means are provided, then device complexity is reduced, but the throttle element jams during operation
Solution Approach 1:
Instead of providing comprehensive centering mechanisms throughout the cover structure, the patent applies centering means (chamfers) only at the specific local positions where the throttle element contacts the cover. This localized approach maintains simple overall device complexity while ensuring reliable throttle element operation through targeted centering at critical contact points.
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 ensures reliable assembly and operation by preventing jamming, reducing pulsations, and extending the service life of the throttle element while maintaining a robust and cost-effective design.
Implementation Method 1
a spring-elastic disk which adjusts a flow cross-section in the at least one outflow channel depending on a pressure difference
Implementation Method 2
a spring-elastic disk which adjusts a flow cross-section in the at least one outflow channel depending on a pressure difference
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to a piston pump (1) for delivering fluids, which piston pump comprises a cylinder (20), a piston which is movably mounted in the cylinder (20), and a pressure chamber (24) which is arranged between an inlet valve and an outlet valve (5) and which is closed off by a cover (10), wherein in the fluid flow (3) downstream of the outlet valve (5) there is provided a throttle element (30) for throttling the fluid flow (3). According to the invention, the throttle element (30) is in the form of a resiliently elastic disk which is inserted into the cover (10), wherein means for pre-centering the throttle element (30) are provided in the cover (10).