Do the compressor intake valve assembly and suction valve assembly provide sealing?
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When the compressor is not operating, at the no-load condition, can the inlet sweep gas enter the cylinder? Can the gas in the outlet pipeline enter the cylinder through the exhaust valve assembly?
It’s possible; at zero load, it is functional. But as for the method used to achieve zero load, if it’s a unloader, that’s how it works
First of all, the valve disc serves a sealing function, but there is always some amount of leakage. It is a one-way valve that allows flow in only one direction, from the inlet to the outlet; therefore, the gas entering through the inlet can reach the cylinder, while gas in the outlet pipeline generally cannot enter the cylinder via the exhaust valve assembly, although a small amount of leaked gas may still make its way into the cylinder. But do not place the unloader in the zero-load position, because in that case it will be fully open, meaning the gas in the outlet pipeline can pass through the exhaust valve assembly and into the cylinder.
Reply to 2# chxp110: If it is in the on state at zero load, then it should be in the off state at 100% load. Why is it set to 100% load when the compressor is running? At this time, the intake valve assembly is closed, so the medium cannot enter the cylinder to be compressed!
Reply to 2# chxp110: Right, we call it a flow control valve here; I’m not sure if that’s what you mean by a unloader!
Reply to 3# 1357911cw: During compressor repair, the air supply was cut off, and the air flow control valve stopped working!
The air volume control valve is at position 0; at this time, the valve disc of the inlet valve is pressed down, resulting in an air intake state. The opening of the outlet valve can only be achieved through the pressure difference between the cylinder interior and the outlet pipeline. Therefore, aside from the inevitable slight leakage at the valve seat, the gas in the outlet pipeline does not return to the cylinder.
Reply to 7# yaohaying72: If the air valve is open at zero load, what is its state at 100% load?
Reply to 8# gw821022: How many cylinders are there at the primary inlet of the compressor? For a single air valve, the volume control device has only two states: forced opening or normal opening and closing; this indicates that all primary air valves are in normal working condition. If there are 2 primary cylinders, three adjustment levels of 0%, 50%, and 100% can be achieved; if there are 4 primary cylinders, then adjustment levels of 0%, 25%, 50%, 75%, and 100% can be attained.
Reply to 9# yaohaying72: The five load levels are 0, 25%, 50%, 75%, and 100%. You mean that no matter which position the volume control valve is in, the inlet pipeline and the cylinder are connected, right?
With a finger unloader, at 0 load, the suction valve is connected to the inlet buffer tank, and gas does not enter the outlet buffer tank through the exhaust valve