Electromagnetic Reciprocating Fluid Device Torque Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electromagnetic reciprocating fluid devices face issues where the motion of the movable member in the longitudinal direction is excessively restrained, and the inclination of the movable member about the longitudinal axis is not prevented, leading to friction and motion restrictions.
Innovation Solution
The device employs a support unit with first and second pistons and cylinders that are slidable along parallel axes, and permanent magnets with specific magnetic polarities and orientations to resist torque and prevent rotation, ensuring smooth reciprocation and fluid flow while maintaining clearance between the magnets and electromagnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the movable member is supported by a diaphragm or cross-shaped support spring to prevent inclination, then the inclination about the longitudinal axis is prevented, but the motion in the longitudinal direction is excessively restrained
Solution Approach 1:
The support function is segmented into two independent components: needle bearings at both ends of the movable member handle the longitudinal motion, while the magnetic attraction between permanent magnets and electromagnets handles the inclination prevention. This segmentation allows each component to perform its specific function without interfering with the other, resolving the contradiction between motion freedom and stability.
Solution Approach 2:
The mechanical support spring or diaphragm system is replaced with a magnetic field-based support system. The permanent magnets attached to the movable member interact with electromagnets on the stationary member to provide both longitudinal support and inclination prevention through magnetic forces, eliminating the need for mechanical elements that restrain motion.
2Power
If the movable member is equipped with a permanent magnet for electromagnetic attraction, then the reciprocating motion is achieved, but a transverse force generates torque causing inclination
Solution Approach 1:
The inclination-preventing function is extracted from the mechanical support system and assigned to a dedicated magnetic interaction system. The permanent magnets on the movable member specifically interact with electromagnets on the stationary member to counteract transverse forces and prevent torque-induced inclination, separating this function from the longitudinal motion support.
Solution Approach 2:
The magnetic field parameters (strength, distribution, polarity) are optimized to simultaneously achieve strong attraction for reciprocating motion while generating counteracting forces to resist torque. By adjusting the electromagnetic parameters, the system achieves both power transmission and stability without mechanical constraints.
3Ease of operation
If the movable member is held by a piston with circular cross section in a cylinder, then the longitudinal motion is allowed, but the inclination about the longitudinal axis cannot be prevented
Solution Approach 1:
The mechanical cylindrical constraint system is replaced with a magnetic field-based stabilization system. The permanent magnets and electromagnets create magnetic forces that resist torque and prevent axial inclination, while allowing the piston-cylinder structure to freely accommodate longitudinal motion without mechanical interference.
Solution Approach 2:
The support system combines different functional elements: needle bearings for longitudinal motion support, permanent magnets for electromagnetic interaction, and electromagnets for active control. This composite approach integrates motion freedom and inclination prevention into a unified system where each component contributes its specific 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 allows for unobstructed motion of the movable member in the longitudinal direction, prevents inclination, and reduces friction by maintaining consistent clearance, thereby enhancing the operational efficiency of the fluid device.
Implementation Method 1
the movable member has a permanent magnet, and the permanent magnet is attracted and repelled by an alternating magnetic field generated by the electromagnets, whereby the movable member is reciprocated
Implementation Method 2
an alternating magnetic field generated by the electromagnets
Implementation Method 3
a support unit for slidably supporting both ends of the movable member... The support unit slidably supports the movable member so as to resist torque imposed on the movable member about the axis
Data Source
Figure 1
Figure 2
Figure 3
AI summary
It is an object of the present invention, in an electromagnetic reciprocating fluid device in which a movable member is equipped with permanent magnets, to resist a torque rotating the movable member about an axis thereof in the reciprocating direction. The electromagnetic reciprocating fluid device has a pair of electromagnets 28, 28' facing each other, and permanent magnets 26, 26' disposed in a space between the opposed electromagnets and held by a movable member 27. When an alternating current is applied to coils 34 formed in the electromagnets, a magnetic force is generated between the electromagnets and the permanent magnets, whereby a driving force for reciprocation is applied to the movable member. One end of the movable member is connected to a piston 18 of a first piston-cylinder assembly 12, while the other end is connected to a piston 18' of a second piston-cylinder assembly 12'. The first and second piston-cylinder assemblies are arranged such that an axis line 58 of the first piston-cylinder assembly and an axis line 59 of the second piston-cylinder assembly are non-coaxial and vertically offset from an axis 60 of the movable member.