Compressor Piston Sealing Structure for Wobble-Induced Leak Reduction

The patent employs a flexible membrane seal (薄的膜状密封结构) that can deform to accommodate the wobbling movement between the piston and cylinder while maintaining sealing effectiveness. This flexible membrane compensates for the relative inclination or tilting that occurs during operation, preventing leaks without requiring a more complex rigid sealing system.

The sealing approach changes from rigid geometric fitting to flexible deformation-based sealing. The membrane seal's ability to change its shape and conform to the varying gap between piston and cylinder during wobbling motion allows effective sealing despite the dynamic conditions created by the rigid connecting rod-piston connection.

Instead of multiple rigid seals and retaining rings, the patent uses a single flexible membrane seal that naturally adapts to the wobbling movement. This simplifies the sealing structure by eliminating the need for complex seal assemblies, retaining rings, and multiple sealing interfaces that would be required to achieve the same sealing effect with rigid components.

The flexible membrane seal is self-adjusting and automatically compensates for the varying gap between piston and cylinder during operation. It requires no additional adjustment mechanisms, retaining rings, or complex mounting structures, as the membrane's flexibility allows it to self-seal the leakage paths created by wobbling movement.

The flexible membrane seal provides effective sealing in the compact two-stage compressor design without requiring additional structural reinforcements or larger clearance volumes. This maintains the compactness of the design while preventing leaks that would otherwise compromise robustness. The membrane's ability to accommodate wobbling movement eliminates the need for oversized clearance volumes that would be required with rigid sealing approaches.

The patent converts the harmful effect of wobbling movement (which causes leaks in rigid designs) into a beneficial feature by using the flexible membrane's deformation capability. The same wobbling motion that creates leakage paths in rigid systems is accommodated by the membrane's flexibility, allowing the compact design to maintain robustness without increasing volume or adding complex sealing mechanisms.