Integrated Spherical Pump Assembly With Outer Rotor Motor
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Solution Overview
Problem
There is a lack of a motor in the prior art that is compatible with the spherical pump in terms of size, hindering its application in portable devices.
Innovation Solution
A spherical pump and motor assembly is designed with an outer rotor motor that integrates with the spherical pump, featuring a cylindrical rotor main body, magnetic ring, stator bracket, and coil windings, with a connection portion protruding from the stator bracket for interference fit, and a rotary disc shaft for torque transmission, minimizing overall size and facilitating assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional motor is used with the spherical pump, then the motor can provide sufficient power, but the overall size of the pump-motor assembly becomes too large for portable devices
Solution Approach 1:
The motor and spherical pump are merged into a single integrated assembly where the motor's rotor shaft is directly coupled with the pump's drive shaft. The motor housing and pump housing form a unified structure, eliminating the need for separate mounting brackets and connection mechanisms, thereby minimizing the overall volume while maintaining power transmission efficiency
Solution Approach 2:
The pump components are nested within the motor housing structure. The spherical pump mechanism is positioned inside the motor's stator housing, with the rotor shaft extending through the stator to drive the pump. This nesting arrangement allows the pump to utilize the motor's structural space, reducing the total assembly volume without compromising motor power output
2Volume of moving object
If the motor is miniaturized to match the spherical pump size, then the overall assembly size is reduced, but the motor may lose sufficient power output
Solution Approach 1:
The motor design incorporates dynamic optimization of the coil windings and magnetic ring arrangement to maximize power density. The stator coils are configured to generate optimal magnetic fields for the reduced-size rotor, enabling the miniaturized motor to achieve sufficient power output through enhanced electromagnetic efficiency rather than increased physical dimensions
Solution Approach 2:
The motor parameters such as magnetic ring magnetization strength, coil winding density, and air gap dimensions are optimized for the miniaturized configuration. These parameter changes enable the small motor to generate adequate torque and power output by increasing the intensity of electromagnetic interactions within the constrained volume
3Ease of operation
If separate mounting methods are used to connect the pump and motor, then assembly flexibility is maintained, but assembly time and installation complexity increase
Solution Approach 1:
The pump and motor are designed as a pre-integrated assembly unit where the motor shaft and pump drive shaft are coupled during motor manufacturing. This merging eliminates the need for separate field assembly steps, reducing installation time and complexity while maintaining the flexibility of obtaining a complete pump-motor module ready for immediate installation in portable devices
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 assembly achieves a compact structure suitable for portable devices, reducing motor power loss and enhancing assembly efficiency while maintaining high installation accuracy.
Implementation Method 1
The outer rotor motor comprises an outer rotor; the outer rotor comprises a rotor main body, which is cylindrical and upward-opening; a magnetic ring is arranged on an inner periphery of the rotor main body; and a rotor central shaft is provided at a center of a bottom surface of the rotor main body; the outer rotor motor further comprises a stator; the stator comprises a stator bracket with a central shaft hole; and a plurality of coil windings composed of a coil and a magnet are arranged on an outer periphery of the stator bracket
Implementation Method 2
The connection portion is configured as a cylindrical groove opening upward; an outer periphery of the cylinder body seat is configured to fit an inner periphery of the connection portion; and the cylinder body seat is provided in the connection portion to form an interference fit, such that the spherical pump is fixedly connected to the stator bracket
Data Source
Figure 1
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Figure 3~5
AI summary
A spherical pump and motor assembly, including a spherical pump with a rotary disc shaft and an outer rotor motor. The outer rotor motor includes an outer rotor and a stator. The outer rotor has a rotor main body, which is cylindrical and upward-opening. A magnetic ring is arranged on an inner periphery of the rotor main body. A rotor central shaft is provided at a bottom center of the rotor main body. The stator includes a bracket with a central shaft hole. Multiple coil windings are arranged on an outer periphery of the bracket. An upper end of the bracket is configured to protrude out of upper ends of the coil windings to form a connection portion fixedly connected to a cylinder body seat. A lower end of the rotary disc shaft is engaged with an upper end of the rotor central shaft for torque transmission.