| 摘要 |
An adaptive hydraulic cylinder with floating seal interface is provided. In an implementation, a misalignment-tolerant hydraulic actuator, e.g., for a submersible hydraulic diaphragm insert pump (HDI), has a floating piston that can reciprocate while decoupled from strict collinearity with the cylinder barrel and the central feed rod that slides through the central axis of the piston. The floating seal can be integrated or provided by a separate insert and provides a pivotable interface between the piston and center rod, allowing these components some freedom of motion to avoid elastic deformation, friction, power loss, and early wear when misalignment or transverse forces on the external end of the piston rod are present. Bearing placement is also selected to eliminate over-constraint. Bearings on the piston, the floating seal interface, center rod, and the piston rod support, for example, are placed singly or close together on each component to approximate a single contact ring that allows the components to self-adjust to different axes, while maintaining a hydraulic seal between all components. |
