Vane-Type Gas Pump Sealing Gap Adjustment Mechanism
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Solution Overview
Problem
The existing vane-type gas pumps face challenges in precisely adjusting the sealing gap between the pump rotor and the stroke ring due to manufacturing tolerances, making the process complex and error-prone.
Innovation Solution
A vane-type gas pump design that includes a closed stroke ring axially clamped by a stroke ring adjustment device to a thrust washer, and a housing clamping device to securely position the thrust washers and stroke ring in a sandwich-like manner, allowing for direct adjustment of the sealing gap between the pump rotor and the stroke ring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stroke ring is radially positioned exclusively by centering pins, then the assembly is simplified, but the sealing gap adjustment precision deteriorates due to manufacturing tolerances
Solution Approach 1:
The positioning function is segmented into two independent parts: centering pins provide radial positioning while stroke ring adjustment devices provide axial positioning. This segmentation allows each component to specialize in one aspect, preventing tolerance accumulation and enabling precise sealing gap adjustment without increasing overall assembly complexity.
Solution Approach 2:
The stroke ring adjustment devices act as intermediary elements between the stroke ring and the pump rotor. These adjustment devices mediate the positioning process by providing a controlled mechanism to set the radial clearance, isolating the sealing gap adjustment from the tolerance effects of the centering pins.
2Device complexity
If the sealing gap is adjusted using only centering pins, then the number of components is reduced, but the adjustment process becomes error-prone and imprecise
Solution Approach 1:
The positioning function is segmented into two independent parts: centering pins provide radial positioning while stroke ring adjustment devices provide axial positioning. This segmentation allows each component to specialize in one aspect, preventing tolerance accumulation and enabling precise sealing gap adjustment without increasing overall assembly complexity.
Solution Approach 2:
The stroke ring adjustment devices enable the stroke ring to self-adjust its radial position relative to the pump rotor. This self-service mechanism allows for precise sealing gap adjustment during assembly without requiring complex external measurement and adjustment procedures.
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 design simplifies the gap adjustment process, reducing the impact of manufacturing tolerances and ensuring a reliable, precise sealing gap, enhancing pneumatic efficiency and reducing assembly errors.
Implementation Method 1
At least one stroke ring adjustment device (100, 102) is configured to axially clamp the closed stroke ring (74) directly to the first separate thrust washer (76)
Implementation Method 2
At least one separate housing clamping device (110, 112, 114) is configured to axially clamp the first separate thrust washer (76), the closed stroke ring (74), and the second separate thrust washer (72) together
Implementation Method 3
The pump rotor is operated by an electric motor or mechanically by a combustion engine and comprises several radially slidable sliding elements. Two adjacent sliding elements delimit together with the pump rotor and the pump housing, respectively, one rotating pump compartment. If the pump rotor rotates, the sliding elements are displaced due to the centrifugal force acting on the sliding elements
Data Source
AI summary
A vane-type gas pump includes a pump housing which forms a pump chamber in which a pump rotor with at least one slidable sliding element is rotatably mounted. At least one fluid inlet opening and at least one fluid outlet opening are dedicated to the pump chamber. The pump housing includes a closed stroke ring, a first separate thrust washer, and a second separate thrust washer. At least one stroke ring adjustment device axially clamps the closed stroke ring directly to the first separate thrust washer. At least one separate housing clamping device axially clamps the first separate thrust washer, the closed stroke ring, and the second separate thrust washer together.