Question: Why is a safety valve installed on the reciprocating oil sump in addition to a breather?
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This post was last edited by zb0231601 on 2017-3-20 at 12:13. Doesn’t the breather serve to balance the pressure inside and outside the oil reservoir, thereby ensuring the stable and safe operation of the oil system? So, what about adding a safety valve? ? ? Is it to better ensure safety? I haven’t seen reciprocating machines much in these past two years; I’m not sure if I still remember them correctly. Are a respirator and a safety valve present simultaneously, or does the safety valve replace the respirator, or are they actually the same thing? It can be said to be the same; a respirator should be bidirectional, while a safety valve should be unidirectional. I’m confused.
I’ve never seen a safety valve installed on a fuel tank; did you see it in designs or with your own eyes?
The safety valve on the fuel tank? ? ? ? Is it the safety valve of the oil pump pipeline? Back into the tank.
There must be a rupture disc in the reciprocating oil tank, usually, to prevent process gas from leaking into the tank and thus to protect it
What was said upstairs is correct; the oil phase usually has a breather valve and a rupture disc
Some leak-free compressor housings require the installation of safety valves; for example, in the case of refrigerant compressors, not only are safety valves needed, but mechanical seals are also installed on both sides of the crankshaft. Housings equipped with safety valves do not have breathers, and this is to prevent process gases from leaking into the atmosphere and causing losses. The leaked process gases are returned to the primary inlet through high-point venting for recycling. Those who say the fuselage doesn’t have a safety valve have just never encountered it.
Breather valves are less commonly used in shaft bearing lubrication systems with forced lubrication. While they can help reduce process gases in the oil circuit, they are difficult to design; allowing air to escape into the atmosphere can result in a messy environment at the site, so there is little advantage to using them. It is sufficient to periodically drain the excess oil after it has been in use for some time.
Does the fuel tank have a rupture disc? Do you mean the one on the oil injector side?