Two-Way Wobble Plate Compressor Friction Reduction
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Solution Overview
Problem
Traditional swash plate compressors experience high friction loss and low loading capacity due to high-speed sliding motion, while wobble plate compressors face issues of non-compactness and complexity, especially when using two-way pistons, leading to vibrations and noise.
Innovation Solution
A two-way wobble plate compressor design featuring a rotor with angled inner surfaces and bearings between the wobble plate and rotor, allowing for a compact structure with reduced friction loss and improved energy conversion efficiency, using needle roller or radial ball bearings to facilitate wobbling motion without rotation with the drive shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional swash plate compressor uses high-speed sliding motion between the swash plate and sliding shoe, then the structure is simple, but friction loss increases and loading capacity decreases
Solution Approach 1:
The patent replaces the traditional sliding friction mechanism with a rolling bearing mechanism. The swash plate is supported by bearings (needle roller bearings or radial ball bearings) that reduce friction by converting sliding motion to rolling motion, thereby reducing energy loss while maintaining structural simplicity
Solution Approach 2:
The patent changes the motion parameters of the swash plate by allowing it to perform wobbling motion without rotating with the drive shaft. This is achieved by disengaging the swash plate from the drive shaft rotation and supporting it on bearings, which changes the friction characteristics from high-speed sliding to low-speed rolling
2Loss of energy
If a wobble plate compressor disengages the wobble plate from the drive shaft to reduce friction, then friction loss decreases, but the structure becomes non-compact and lacks industrial applicability
Solution Approach 1:
The patent merges the wobble plate with the rotor by fixing the wobble plate on the rotor, which is driven by the drive shaft. This integration allows the wobble plate to perform necessary wobbling motion while maintaining a compact structure suitable for industrial applications
Solution Approach 2:
The patent introduces bearings as intermediary elements between the wobble plate and the drive shaft/rotor system. These bearings enable the wobble plate to be disengaged from direct drive shaft rotation (reducing friction) while maintaining a compact structure through the integrated rotor-wobble plate assembly
3Stability of the object's composition
If a wobble plate compressor uses a wobble plate stopper to prevent rotation, then the wobble plate is constrained, but the structure becomes complicated producing vibrations and noises
Solution Approach 1:
The patent removes the wobble plate stopper component entirely from the design. Instead of constraining the wobble plate with a stopper, the invention uses the bearing-supported wobbling motion mechanism that naturally prevents unwanted rotation while maintaining structural simplicity
Solution Approach 2:
The patent enables the wobble plate to self-constrain its motion through the bearing-supported wobbling mechanism. The wobble plate performs controlled wobbling motion driven by the rotor without requiring external stoppers, allowing the system to self-regulate motion and reduce vibrations and noises
4Area of stationary object
If a two-way piston compressor requires mounting bearing and connecting rod at the same position, then space utilization is maximized, but existing wobble plate structures are not suitable
Solution Approach 1:
The patent resolves the spatial conflict by changing the dimensional arrangement of components. The wobble plate is positioned in a different spatial plane relative to the piston, allowing the bearing to be mounted at the same position as the connecting rod attachment point without interference, thus maximizing space utilization while maintaining two-way piston compatibility
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 achieves a compact, low-complexity compressor with improved efficiency and output power, suitable for commercial applications, while controlling costs and minimizing vibrations and noise.
Implementation Method 1
there is only slight sliding motion between the wobble plate and the sliding shoe, and sliding friction with high speed motion between the traditional swash plate and the sliding shoe has been replaced by rolling friction of the bearing
Data Source
AI summary
A two-way wobble plate compressor, comprising: a cylinder block (100); a two-way piston (200) capable of reciprocating within a cylinder bore (110) of the cylinder block (100); a drive assembly (300) driving the two-way piston (200), the drive assembly (300) including a drive shaft (310), a rotor (320) fixedly connected with the drive shaft (310), and an annular wobble plate (330) fitting with the rotor (320); the rotor (320) has an inner surface (323) for fitting with the annular wobble plate (330), the inner surface (323) include a first inner surface (324) and a second inner surface (325), which are oppositely arranged, and a rotor contact surface (326); the wobble plate (330) is partially encircled within the inner surface (323) of the rotor (320), and includes a first peripheral portion (334), a second peripheral portion (335), and a wobble plate contact surface (336); a first bearing (340) is provided between the first inner surface (324) and the first peripheral portion (334), a second bearing (350) is provided between the second inner surface (325) and the second peripheral portion (335), and a third bearing (360) is provided between the rotor contact surface (326) and the wobble plate contact surface (336). The two-way wobble plate compressor of the present invention may significantly reduce friction loss.