Water Pump Motor Sealing Structure to Block Leakage and Debris
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Solution Overview
Problem
Conventional water pump motors face issues with water leakage and foreign matter ingress, leading to increased costs and reduced productivity due to the need for separate mechanical seals and additional waterproofing measures, and are prone to motor breakdowns from debris accumulation.
Innovation Solution
A water pump motor design featuring a stator case with a plastic injection mold that seals the stator and rotor, combined with vortex creation wings on the impeller to prevent foreign matter ingress, and a hybrid magnet structure using inexpensive isotropic and anisotropic magnets for high magnetic force and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical seal is used to protect the motor from water, then waterproofing is improved, but processing cost and material cost increase
Solution Approach 1:
The patent integrates the waterproofing function directly into the motor housing structure by designing the stator case with integrated sealing features and positioning structures. The stator case itself becomes the waterproof barrier, eliminating the need for separate mechanical seal components and reducing assembly complexity while maintaining reliable waterproofing.
2Reliability
If a mechanical seal is used to protect the motor from water, then waterproofing is improved, but productivity decreases due to additional post-processing work
Solution Approach 1:
The waterproofing function is merged into the motor housing design, allowing the stator case to serve both structural and sealing purposes. This integration eliminates separate post-processing assembly steps for mechanical seals, streamlining the manufacturing process and improving productivity while maintaining reliable waterproof protection.
Solution Approach 2:
The stator case is designed with pre-integrated sealing structures and positioning features that are formed during the primary manufacturing process. This preliminary incorporation of waterproofing features eliminates the need for subsequent assembly operations, reducing post-processing work and enhancing productivity.
3Reliability
If a can cover is used to protect the water pump motor, then waterproofing is improved to some extent, but prime cost rises and productivity lowers due to separate production and assembly
Solution Approach 1:
The patent integrates the can cover functionality directly into the stator case structure, which is molded as a single integrated component. The stator case incorporates the sealing flange and positioning structures that were previously separate elements, eliminating the need for separate production and assembly of the can cover, thereby reducing prime cost and improving manufacturing efficiency.
4Reliability
If a can cover is used to protect the water pump motor, then waterproofing is improved, but additional waterproof measures are still required
Solution Approach 1:
The stator case is designed with integrated sealing structures including sealing flanges, O-ring grooves, and positioning features that are incorporated into the single molded piece. This integration provides complete waterproof protection for the motor, eliminating the need for additional separate waterproofing measures and reducing overall device complexity.
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 provides a waterproof structure, improved assembly efficiency, reduced costs, and enhanced motor performance with a high-power, high-efficiency rotor, while preventing foreign matter attachment and ensuring reliable operation.
Implementation Method 1
a stator case which seals an inner circumferential portion, an outer circumferential portion and an upper surface of the stator
Implementation Method 2
vortex creation wings are formed on the rear surface of an impeller is mounted within the drain housing of the water pump
Implementation Method 3
a wholly inexpensive rotor of a high magnetic force is implemented by a combination of a main magnet made of an inexpensive ring-shaped isotropic magnet and a sub-magnet made of a number of anisotropic magnet pieces of a high magnetic force
Data Source
AI summary
Provided is a water pump motor that implements a waterproof structure of a motor using a cover to seal a stator, and a water pump using the same. The water pump motor includes: a lower case on top of which a cylindrical protrusion is provided; a stator whose lower portion is supported on top of the protrusion and is sealed by the lower case; a stator case that is formed of an annular trench shape that seals the inner circumferential portion; a rotational shaft whose lower portion is rotatably supported by a groove; a rotor placed at the upper-inner circumferential portion of the stator case and at the center of which the rotational shaft is coupled to thus rotate according to an action with respect to the stator; and an upper case coupled with the lower case in an inverted cup shape.