Deformable Pump Ring S-Curve Profile for Leak Tightness
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Solution Overview
Problem
Existing pump devices face challenges in achieving high leak tightness and rapid pressure build-up while maintaining a long service life, particularly due to excessive strain and wear issues during fluid transport.
Innovation Solution
The pump device incorporates a hydraulics housing with a pump ring and eccentric configuration, featuring an S-shaped curve profile and deformable elastomeric materials, which reduces principal strains and enhances secure anchoring, ensuring high leak tightness and extended service life through controlled deformation and pressure distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pump ring is made deformable to achieve high leak tightness and rapid pressure build-up, then the sealing performance improves, but the service life deteriorates due to excessive strain and wear
Solution Approach 1:
The pump ring is designed with an S-shaped curve profile instead of a straight or simple curved contour. This specific curvature distribution optimizes the deformation pattern during operation, reducing stress concentration and principal strains while maintaining effective sealing contact, thereby extending service life without compromising leak tightness
Solution Approach 2:
The patent modifies the geometric parameters of the pump ring by implementing an S-shaped curve with specific convex and concave sections. This parameter change alters the stress distribution and deformation characteristics, reducing peak strains that would otherwise lead to premature wear and failure, thus resolving the contradiction between sealing performance and durability
2Productivity
If the eccentric presses the pump ring irregularly against the hydraulics housing to achieve rapid pressure build-up, then the productivity improves, but the strain on the pump ring increases reducing service life
Solution Approach 1:
The S-shaped curve profile of the pump ring is specifically designed to distribute the irregular pressing forces from the eccentric more evenly. The convex and concave sections create a progressive deformation pattern that maintains rapid pressure build-up while avoiding sudden stress peaks that would cause wear and reduce service life
3Duration of action of stationary object
If the pump ring profile follows a contour with S-formed curve to reduce principal strains, then the service life improves, but the structural complexity increases
Solution Approach 1:
The S-shaped curve, while more complex than a straight line, represents a relatively simple continuous geometric form that can be manufactured using standard forming processes. The complexity is minimal compared to the service life extension achieved, making it an efficient design solution that balances manufacturability with performance
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 solution achieves high leak tightness and rapid pressure build-up, along with improved start-up behavior at low temperatures, leading to a longer service life and secure fluid transport.
Implementation Method 1
The pump ring (14), which is also referred to as a diaphragm, is thereby deformable and defines, at least in certain regions, a pump chamber
Implementation Method 2
On the first axial side and the second axial side, the profile of the pump ring in each case follows a contour with an S-formed curve with a convex section and a concave section, wherein the convex section lies further outwards in a radial direction of the shaft in comparison with the concave section. The curve described serves to reduce the principal strains and in this way achieve a longer service life.
Data Source
AI summary
The invention relates to a pump device for pumping a liquid having a hydraulics housing (12), in which a pump ring (14), a pump ring support (16), and an eccentric (18) are accommodated, which eccentric is to be driven by a shaft (20), which defines an axial and a radial direction, wherein the pump ring (14) has a first axial side (45) and a second axial side (47), wherein the hydraulics housing (12) comprises an annular portion (22) and a first and a second lateral section (24, 26), wherein the two lateral sections (24, 26) are arranged opposite each other, wherein the pump ring (14) is arranged, at least in some portions, between the two lateral sections (24, 26) of the hydraulics housing (12), and wherein on the first axial side (45) and the second axial side (47), the profile of the pump ring (14) in each case follows a contour with an S-formed curve (32) with a convex section (34) and a concave section (36), wherein the convex section (34) lies further outwards in a radial direction of the shaft (20) in comparison with the concave section (36).