Symmetrical Rotor Fluid Transfer Device Vibration Reduction
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Solution Overview
Problem
Existing fluid transfer devices using rotary piston pumps face challenges with noise and vibration due to eccentric rotation, which degrade their airtightness and efficiency, while maintaining high flow and pressure functions.
Innovation Solution
A fluid transfer device with a simple modular structure featuring symmetrical rotors and epitrochoid-shaped rotor housings, along with potholes on the inner surfaces of the rotor housings, to reduce vibration and noise, and control fluid movement and pulsation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rotary piston pump uses eccentric rotation to transfer fluid, then high flow and pressure functions are achieved, but noise and vibration increase
Solution Approach 1:
The patent employs symmetrical rotor design where two rotors are positioned symmetrically with respect to the rotation axis. This symmetry causes the centrifugal forces generated by each rotor to cancel each other out, significantly reducing vibration and noise while maintaining high fluid transfer capability
Solution Approach 2:
The symmetrical arrangement of rotors acts as a counterbalancing mechanism where one rotor serves as the counterweight for the other. The centrifugal forces generated are equal in magnitude but opposite in direction, effectively neutralizing each other to reduce harmful vibrations
2Productivity
If a piston method is used to convert rotary motion to linear motion, then fluid transfer is achieved, but the structure becomes complex
Solution Approach 1:
The patent removes the traditional piston-rod-crank mechanism from the system. Instead of using linear reciprocating motion, it directly employs rotational motion of symmetrical rotors within epitrochoid housings to achieve fluid transfer, dramatically simplifying the structural configuration
Solution Approach 2:
Rather than converting rotary motion to linear motion through pistons, the invention inverts the approach by using direct rotational motion of rotors to create volume changes in the fluid chambers, eliminating the need for linear motion conversion mechanisms
3Stress or pressure
If eccentric rotation is used in a rotary piston pump, then fluid compression is achieved, but airtightness degrades
Solution Approach 1:
The patent employs epitrochoid curved surfaces in the rotor housing design. This specific curvature geometry ensures continuous contact between the rotors and the housing walls during rotation, maintaining effective sealing and airtightness while still allowing the rotors to generate the necessary volume changes for fluid compression
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 device achieves low noise and vibration while maintaining high fluid flow and pressure capabilities, with controlled pulsation and ease of manufacturing and maintenance.
Implementation Method 1
a first rotor disposed in the first fluid compression space so as to divide the first fluid compression space into a plurality of variable-volume spaces and coupled to the first eccentric portion while surrounding the first eccentric portion in a radial direction of the first eccentric portion
Implementation Method 2
fluid is transferred by volume change due to an eccentric rotation of the triangular rotor
Data Source
AI summary
The present disclosure describes a rotary pulsation generator having a simple structure capable of transferring fluid while implementing low noise and low vibration and having high flow of fluid and high pressure suction and discharge functions. According to the present disclosure, fluid is transferred by adjusting a width and interval of pulsation while reducing vibration caused by eccentric rotation of a rotor.