Engine Coolant Outlet Sealing Structure for Pipe Vibration

A protrusion is introduced as an intermediary element between the connecting port and the pipe. This protrusion restricts radial relative movement between these components, thereby preventing excessive compression of the seal member while still allowing axial movement to absorb mounting errors. The protrusion acts as a mediator that controls the interaction between the connecting port and pipe, maintaining sealing performance without compromising ease of connection.

The connecting port is segmented into multiple functional zones: an axial movement zone that allows expansion/contraction to absorb mounting errors, and a radial restriction zone created by the protrusion that prevents excessive radial movement. This segmentation enables different types of movement to be controlled differently, maintaining both ease of connection and sealing performance.

The design allows dynamic axial movement between the pipe and connecting port to adapt to mounting errors and thermal expansion, while the protrusion provides a dynamic radial constraint that becomes active only when excessive radial movement occurs. This dynamic approach enables the system to adapt to normal variations while preventing damaging extreme conditions.

The protrusion provides beforehand cushioning by restricting radial movement before excessive compression of the seal member can occur. By preemptively limiting the range of radial movement, the protrusion prevents the seal member from undergoing extreme compression that would compromise sealing performance.