Coaxial 2D Motor Piston Pump With Magnetic Coupling Drive
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Solution Overview
Problem
Current two-dimensional piston pumps experience high mechanical wear and tear on the motor shaft and excessive heating when operating at high speeds due to axial forces, which affects the motor's longevity and efficiency.
Innovation Solution
Integration of a two-dimensional motor and piston pump, where the outer rotor of the motor serves as both the piston and flow distribution mechanism, eliminating the need for a separate transmission mechanism and reducing friction through magnetic coupling, thereby addressing the axial force issue and enhancing heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor shaft drives the piston through direct shaft connection with cam mechanism, then the piston can achieve two-dimensional motion for suction and discharge, but the motor shaft is subjected to high axial force causing mechanical wear and tear
Solution Approach 1:
The patent replaces the traditional mechanical shaft connection and cam drive mechanism with a magnetic coupling system. The motor uses magnetic fields to transmit rotational motion to the piston without physical contact, eliminating axial forces on the motor shaft and solving the wear and durability problems while maintaining the two-dimensional motion capability for suction and discharge.
Solution Approach 2:
The patent introduces a magnetic coupling field as an intermediary between the motor rotor and the piston. This magnetic field acts as a mediator to transmit motion and force without direct mechanical contact, allowing the piston to be driven by magnetic attraction/repulsion rather than direct shaft connection, thereby protecting the motor shaft from axial loads.
2Productivity
If the motor operates at high speed for long time, then productivity is improved, but the motor heats up seriously due to friction and mechanical losses
Solution Approach 1:
By replacing the mechanical contact-based cam and shaft drive system with a magnetic coupling system, the patent eliminates friction between moving parts. The magnetic field transmits motion without physical contact, dramatically reducing mechanical losses and heat generation, enabling sustained high-speed operation without excessive heating.
3Ease of operation
If traditional mechanical transmission mechanism is used, then the piston can be driven, but friction is high causing energy loss and heat generation
Solution Approach 1:
The patent substitutes the mechanical transmission mechanism (shafts, bearings, cam contacts) with a magnetic coupling system. The magnetic field transfers energy and motion without physical contact, eliminating friction-based energy losses associated with traditional mechanical transmissions while maintaining effective piston drive capability.
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
This configuration reduces mechanical wear, improves heat dissipation, and enhances volumetric efficiency by converting rotational and axial movements into magnetic coupling, allowing for continuous suction and discharge with reduced friction and increased power density.
Implementation Method 1
An external rotor motor is a motor in which the coil is located on the stator and the permanent magnet is on the outer rotor
Implementation Method 2
reducing friction through magnetic coupling
Data Source
AI summary
The present disclosure provides a two-dimensional motor piston pump, including a two-dimensional motor and a two-dimensional piston pump. The two-dimensional motor and the two-dimensional piston pump are nested with each other and arranged coaxially. The two-dimensional motor includes a stator and an outer rotor, and the outer rotor is coaxial with the stator and is sleeved outside the stator. The two-dimensional piston pump includes: a flow distribution mechanism including a flow distribution rotor and a pump body, a piston mechanism including a left cam and a right cam; a roller assembly including a roller and a roller shaft, and a pump housing, a left end cover, and a right end cover.