Eccentric Flange Connection Structure for Diaphragm Pump Sealing
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Solution Overview
Problem
Conventional diaphragm pumps face issues with fluid leakage due to errors in the distance between flow path portions and connecting positions, leading to improper compression of sealing members and increased costs when using intermediate members to address these errors.
Innovation Solution
A flange connection structure with an adjusting member that causes the axis lines of connection and target end portions to be eccentric, allowing for rotational adjustment to eliminate distance errors and ensure proper compression of sealing members, thereby reducing the number of sealing members needed and maintaining low costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate member such as an eccentric flange is provided to eliminate the difference in distance, then the sealing performance is improved, but the cost increases due to the number of parts increased and the structure complicated
Solution Approach 1:
The patent introduces an intermediate member (eccentric flange) between the flow path portion and the coupling member to mediate the connection. This intermediate member with its eccentric structure allows adjustment of the distance between connecting positions, enabling proper compression of the sealing member even when there are manufacturing errors in the distances between flow path portions and coupling members, thus improving sealing performance without requiring complete redesign of the entire connection structure
Solution Approach 2:
The patent changes the geometric parameter of the intermediate member by making it eccentric (offset from the center). This parameter change allows the intermediate member to compensate for distance errors between connecting positions. By adjusting the eccentricity amount and orientation, the connection can accommodate manufacturing tolerances while maintaining proper sealing member compression
2Reliability
If an intermediate member such as an eccentric flange is provided to eliminate the difference in distance, then the sealing performance is improved, but the cost increases due to the number of parts increased
Solution Approach 1:
The patent introduces an intermediate member (eccentric flange) between the flow path portion and the coupling member to mediate the connection. This intermediate member with its eccentric structure allows adjustment of the distance between connecting positions, enabling proper compression of the sealing member even when there are manufacturing errors in the distances between flow path portions and coupling members, thus improving sealing performance without requiring complete redesign of the entire connection structure
Solution Approach 2:
The intermediate member serves multiple functions: it acts as a connection element between the flow path portion and coupling member, provides adjustment capability for distance errors, and serves as a mounting surface for the sealing member. By consolidating these functions into a single component rather than requiring multiple separate parts, the patent reduces the overall number of parts while maintaining sealing 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 eccentric adjusting member effectively suppresses fluid leakage by ensuring proper compression of sealing members, reducing the number of sealing members required and lowering costs compared to traditional configurations with intermediate members.
Implementation Method 1
an adjusting member including a first attaching portion attached to the connection end portion and a second attaching portion attached to the target end portion, in which in the adjusting member, the first attaching portion is rotatable having a direction orthogonal to the end face of the connection end portion as an axis line direction and the second attaching portion is rotatable having a direction orthogonal to the end face of the target end portion as an axis line direction, and an axis line of the connection end portion and an axis line of the target end portion are caused to be eccentric with respect to each other
Implementation Method 2
a sealing member disposed between an end face of the connection end portion and an end face of the target end portion, a fixing member fixing the connection end portion and the target end portion while compressing the sealing member
Data Source
AI summary
An adjusting member may cause an axis line of connection end portions and an axis line of a housing side flange portion to be eccentric with respect to each other. The connection end portions and the housing side flange portions may be connected and the first attaching portion and the second attaching portion may be rotated to compress a sealing member. The position where the sealing member contacts an end face of the connection end portions may change by rotating each attaching portion and two connection targets can be directly connected.