Oil tank cap for mechanical pumps
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The oil tank of the pump has a cover, and the cover has a vent hole. What impact will it have on the lubricating oil of the pump if this vent hole is blocked? Thank you, points appreciated
This post was last edited by ylb913 on 2018-8-9 at 19:35. If too much oil is used in the bearing box, oil will leak from both ends, which indicates that both ends of the bearing box are in contact with the atmosphere； Early bearing housings had a filling cup on top and a viewing window on the side; in such cases, the liquid level visible through the viewing window corresponded to the actual liquid level inside the bearing housing. Later, constant-level oil cups (commonly known as automatic oil fillers) became popular. There is some expertise involved in installing such automatic oil fillers; it is necessary to choose the correct installation height for them in order to maintain a liquid level of 1/2–2/3 within the traditional sight glass of the bearing housing. In this case, the space between the constant liquid level at the bottom of the oil filler and the upper oil reservoir must be in communication with the atmosphere. It’s a bit difficult to convey this just with words; the original poster didn’t provide any relevant images, and the specific details are unclear.
I also want to know the specific details of this; please reply, expert!
A clogged breather cap prevents the oil and gas generated during the operation of the pump from being discharged, which leads to an increase in oil temperature and bearing temperature. The same principle applies to some units that use axial flow fans at the oil station to vent oil vapor【Personal opinion only】
The sealing between the bearing housing and the shaft is typically achieved using labyrinth rings, skeleton oil seals, etc. An absolute seal is not always possible; if the breather valve (vent valve) becomes blocked, the oil and gas inside will heat up, creating positive pressure that leads to oil leakage from the oil seal. In systems like INPROSEAL, the gap between the rotating and stationary rings of the labyrinth seal is around 260 micrometers; water and oil molecules are smaller than 20 micrometers, and the sealing rings used in such systems generally cannot prevent them from passing through.
Typo, correction: Seals such as labyrinth rings and skeleton oil seals cannot achieve absolute sealing.
A positive pressure is created in the oil chamber, causing the engine oil to be discharged from the oil seals on both sides