Submerged Centrifugal Pump Elastic Sealing
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Solution Overview
Problem
Existing submerged centrifugal electric pumps face challenges in protecting the motor and electrical connections from liquids, maintaining mechanical components, and facilitating easy assembly and disassembly for maintenance, especially in pumps with small dimensions, where complex and expensive fixing devices are required, and precise axial positioning of the motor shaft is difficult.
Innovation Solution
A submerged centrifugal electric pump design featuring a tubular casing with elastic occlusion members and support bodies that allow for quick and reliable mounting and dismounting, using a ring nut and fastening mechanism to securely position the motor shaft and prevent liquid ingress, while maintaining precise axial alignment and efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex fixing devices are used to protect the motor and electrical connections from liquids, then the protection reliability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The pump is divided into separate segments: a motor segment and a pumping segment, connected by a separable connection piece. This segmentation allows the motor to be protected from liquid ingress while enabling easy disassembly for maintenance, resolving the contradiction between protection reliability and device complexity
Solution Approach 2:
A connection piece acts as an intermediary element between the motor segment and pumping segment. This intermediary component provides both liquid sealing and mechanical connection functions, protecting the motor while maintaining simple overall device structure
2Reliability
If complex fixing devices are used to protect the motor and electrical connections from liquids, then the protection reliability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The pump is divided into separate segments: a motor segment and a pumping segment, connected by a separable connection piece. This segmentation allows the motor to be protected from liquid ingress while enabling easy disassembly for maintenance, resolving the contradiction between protection reliability and device complexity
Solution Approach 2:
A connection piece acts as an intermediary element between the motor segment and pumping segment. This intermediary component provides both liquid sealing and mechanical connection functions, protecting the motor while maintaining simple overall device structure
3Reliability
If the casing is sealed to protect motor components, then the protection reliability is improved, but the ease of repair deteriorates
Solution Approach 1:
The pump is divided into separate segments: a motor segment and a pumping segment, connected by a separable connection piece. This segmentation allows the motor to be protected from liquid ingress while enabling easy disassembly for maintenance, resolving the contradiction between protection reliability and device complexity
Solution Approach 2:
A connection piece acts as an intermediary element between the motor segment and pumping segment. This intermediary component provides both liquid sealing and mechanical connection functions, protecting the motor while maintaining simple overall device structure
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 design enables easy and rapid assembly/disassembly, ensures reliable protection of motor components, and maintains precise axial positioning of the motor shaft, reducing maintenance complexity and operational costs, while ensuring effective sealing and efficient heat dissipation.
Implementation Method 1
elastic occlusion members that allow for quick and reliable mounting and dismounting
Implementation Method 2
support body provided with rolling support members
Implementation Method 3
centrifugal electric pump... a pumping unit and a motor unit generally of the electrical type, suitable to operate the liquid transfer from the suctioning openings to the discharge opening
Data Source
Figure 1~2
Figure 3
Figure 4~7
AI summary
The submerged centrifugal electric pump comprises an external casing (2) comprising a first and a second tubular portion (5, 7) suitable to be connected coaxial to one another, a pumping unit (3) inserted axially in the first portion (5) of the casing (2) to suction a liquid through a suctioning opening (101 ) and transfer the liquid in outlet through a discharge opening (11 ), and a motor unit (4) inserted in the second tubular portion (7) of the casing (2) and provided with a motor shaft (15) suitable to be connected in use to the pumping unit (3). The centrifugal electric pump comprises means (19) for fixing the axial position of the motor shaft (15) interposed between the motor unit (4) and the pumping unit (3). The fixing means (19) comprise an occlusion member (20) having an elastic material portion (23) suitable to engage the internal surface of the casing (2), a support body (22) suitable to be axially linked to the occlusion member (20) and a fastening member (21 ) suitable to be associated with the occlusion member (20) to perform the radial expansion of the elastic material portion (23).