Submersible Motor Pump Coupling With Threadless Precision Fixing
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Solution Overview
Problem
Existing submersible motor fixing devices for pumps are not sufficiently accurate, simple, or quick to mount, and lack versatility and cost-effectiveness.
Innovation Solution
A submersible electric motor with a fixing device featuring a cylindrical body, external tubular jacket, and connecting members with specific hole configurations that allow for precise and easy assembly, using a first connecting member inserted into a base wall hole and a second connecting member inserted into side and tubular jacket holes, ensuring accurate positioning and locking without threaded connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If threaded holes and studs are used to fix the motor to the pump, then the connection strength is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The invention extracts and eliminates the threaded connection elements (studs and threaded holes) from the fixing device, replacing them with a simpler press-fit mechanism using cylindrical connection members that rely on friction and geometric interference rather than threaded engagement
Solution Approach 2:
The fixing device is segmented into distinct cylindrical connection members that can be independently positioned and inserted through specifically oriented holes, allowing for modular assembly and simplifying the overall fixing mechanism
2Reliability
If multiple connecting members with threaded holes are used, then the reliability of the connection is improved, but the ease of manufacture and installation deteriorates
Solution Approach 1:
Instead of creating threaded holes in the motor body and pump base portion, the invention inverts the approach by using smooth cylindrical connection members that are inserted into simple cylindrical holes, eliminating the need for threading operations while maintaining connection reliability through friction and geometric interference
Solution Approach 2:
The invention uses simple cylindrical connection members without threaded portions, which can be manufactured more cheaply and replaced more easily if needed, trading the long-term durability of threaded connections for manufacturing simplicity and cost-effectiveness
3Strength
If traditional fixing methods with studs and locking nuts are used, then the connection strength is improved, but the installation time and complexity increase
Solution Approach 1:
The cylindrical connection members are pre-positioned in the motor body and pump base portion during manufacturing, so that during assembly only a simple insertion action is required rather than threading and tightening operations, significantly reducing installation time while maintaining connection strength
Solution Approach 2:
The invention replaces the mechanical threading and locking system with a simpler press-fit system that relies on friction and geometric interference, eliminating the need for tools and complex assembly procedures while maintaining adequate connection strength
4Manufacturing precision
If the tubular jacket is locked with screws and fastening bushes, then the positioning accuracy is improved, but the device complexity and cost increase
Solution Approach 1:
The invention merges the positioning and locking functions into a single cylindrical connection member that is inserted through communicating holes, combining the functions of alignment and fixation that were previously separated into multiple components (screws and fastening bushes)
Data Source
Figure 1~2
Figure 3~4
AI summary
The submersible electric motor associable with a pump comprises a mainly cylindrical body having a longitudinal axis; an electric motor assembly housed in the mainly cylindrical body; a drive shaft, coaxial to said longitudinal axis, operable in rotation by said motor assembly and housed at least partially in the mainly cylindrical body. The mainly cylindrical body comprises an external tubular jacket and a coupling end which can be inserted into the external tubular jacket. The coupling end has a base wall and a side wall. The motor also comprises a device for fixing the motor to the pump.