Electric Outboard Cooling Pump Impeller Drive With One-Way Bearing
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Solution Overview
Problem
Existing electric outboard devices face impeller blade damage due to reverse rotation and limited cooling efficiency, restricting their application to small devices and preventing direct water cooling in larger ones.
Innovation Solution
An impeller driving device with a gearbox housing and impeller housing configuration that ensures the impeller blade rotates only in one direction, using one-way bearings to transmit rotating force regardless of the propeller shaft's direction, enabling direct water cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the impeller blade is designed to rotate in both directions to match propeller shaft rotation, then the device can operate in both forward and reverse directions, but the impeller blade becomes overloaded and damaged due to reverse rotation
Solution Approach 1:
A one-way bearing is introduced as an intermediary component between the propeller shaft and the impeller shaft. This bearing allows torque transmission in only one direction (from impeller to propeller), blocking reverse torque from reaching the impeller blade. The one-way bearing acts as a mechanical mediator that decouples the bidirectional rotation requirement from the unidirectional impeller operation, resolving the contradiction between bilateral adaptability and unidirectional reliability
2Reliability
If air cooling or heat exchange method is used for motor cooling, then the impeller blade damage problem is avoided, but cooling efficiency deteriorates
Solution Approach 1:
The one-way bearing serves as a mediator that enables the direct water cooling system to operate reliably by preventing reverse rotation damage to the impeller blade. This allows the system to use efficient direct water cooling instead of less efficient air cooling or heat exchange methods, thus improving cooling efficiency while maintaining impeller durability
3Use of energy by moving object
If direct water cooling method is implemented, then cooling efficiency increases, but the impeller blade becomes vulnerable to overload and damage from reverse rotation
Solution Approach 1:
The one-way bearing is introduced as a protective intermediary between the propeller shaft and impeller shaft, allowing the direct water cooling system to operate at high efficiency while preventing reverse rotation forces from damaging the impeller blade. This mediator enables the system to achieve both high cooling efficiency and impeller blade durability simultaneously
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
Prevents impeller blade overload and damage, enhancing cooling efficiency and output by allowing direct water cooling, suitable for large electric outboard devices.
Implementation Method 1
a first one-way bearing (3) that is locked clockwise and unlocked counterclockwise is coupled to an upper portion of the propeller shaft (1)
Implementation Method 2
an impeller blade (8) is installed on a right side of the impeller shaft (7)
Data Source
AI summary
The present disclosure relates to an impeller driving device for a cooling pump of an electric outboard device, configured so that a gearbox housing is installed on an outboard-device body and an impeller housing is installed against an outer surface of a right side of the gearbox housing on the outboard-device body to drive the impeller for the cooling pump of the electric outboard device.