What is the purpose of setting up starting oil in the turbine’s oil circuit?
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As the title suggests, from what I’ve seen so far, for all turbine models, the starting oil pressure must be established before the quick-shut oil pressure can be created. I was wondering if there are any designs that do not require the establishment of starting oil pressure I’m not quite sure from the structure diagram of the quick-shut system: if the quick-shut valve can close on its own thanks to the spring force, then why is it necessary to use a complex cylinder sleeve along with starting oil?
Well, I’m not sure if there are shut-off valves that don’t require starting oil, but for those that do, the function of the starting oil is to push the piston down so that it makes contact with the spring cover; at the same time, the piston blocks the return oil port. Then, starting oil is used to open the shut-off valve. The description isn’t very clear; you can search on Baidu for information on the structure of quick-close valves. You’ll be able to understand it pretty well then
The quick-close valve indeed achieves rapid closure through a spring, but then how is it opened? ! It’s just by controlling the oil! The starting oil is used to push the piston against the spring cover, allowing oil to leak out from the drain port; then, the quick-close oil is used to push up the piston and the spring cover (connected to the valve stem), thereby opening the valve. It’s just a brief description; for details, search online for the startup sequence of quick-close valves and then consult the structure of those valves. It’s not difficult