Impeller Brazing Guide Grooves for Flow Control
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Solution Overview
Problem
Conventional manufacturing methods for impellers in fluid transmitting devices face issues with uneven flow of molten brazing material, leading to unnecessary adhesion and impaired rotational balance due to difficulties in strictly horizontal core disposition.
Innovation Solution
The method involves creating guide grooves on the inner surface of the core, aligned in the peripheral direction, to efficiently guide the molten brazing material into positioning holes and gaps between the core and blades, utilizing capillary action for uniform distribution and minimizing residual material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the core is disposed horizontally without guide grooves, then the brazing material can be disposed on the inner surface of the core, but the molten brazing material flows unevenly and adheres unnecessarily to the concave inner surface, lowering yield and impairing rotational balance
Solution Approach 1:
Guide grooves are formed in advance on the inner surface of the core before the brazing process. These pre-formed grooves channel the molten brazing material along predetermined paths, ensuring uniform distribution to the positioning holes and preventing unnecessary adhesion to the concave inner surface, thereby resolving the flow uniformity issue and improving material yield
Solution Approach 2:
The guide grooves act as intermediary structures that mediate between the disposed brazing material and the positioning holes. They provide a controlled pathway for the molten brazing material to flow, ensuring it reaches the intended locations (positioning holes and gaps between core and blades) uniformly without adhering to the concave inner surface, thus improving both flow uniformity and material yield
2Manufacturing precision
If the core is disposed horizontally without guide grooves, then the brazing process can proceed, but residual brazing material remains on the concave inner surface, impairing the rotational balance of the impeller
Solution Approach 1:
Guide grooves are formed in advance on the inner surface of the core to establish predetermined flow paths for the molten brazing material. This preliminary structuring ensures that the brazing material flows uniformly to the positioning holes and gaps between the core and blades, preventing residual material from remaining on the concave inner surface and thus maintaining the rotational balance of the impeller
Solution Approach 2:
The guide grooves serve as intermediary channels that direct the molten brazing material away from the concave inner surface and toward the positioning holes and blade gaps. By providing this controlled pathway, the guide grooves prevent harmful residual material from accumulating on the inner surface, thereby eliminating the harmful factor that would impair rotational balance
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 approach enhances the yield of the brazing material and prevents rotational imbalance by ensuring efficient brazing and minimizing residual material on the impeller.
Implementation Method 1
utilizing capillary action for uniform distribution
Data Source
AI summary
In a manufacturing method of an impeller for a fluid transmitting device, multiple guide grooves aligned in a peripheral direction to allow communication between adjacent ones of multiple positioning holes are provided in a concave inner surface of a core in advance; and in a step of melting a brazing material and causing the molten brazing material to penetrate into gaps between coupling pieces and positioning holes that are fitted to each other and further into gaps between the core and the blades, the molten brazing material is guided to the positioning holes through the multiple guide grooves. Accordingly, the step allows the molten brazing material to be efficiently guided to the gaps between the coupling pieces and positioning holes, thereby improving the yield of the brazing material and preventing an influence of a residual brazing material over the rotational balance of the impeller.