FIELD: machine building.
SUBSTANCE: group of inventions relates to differential valves, i.e. valves, which are automatically actuated by pressure drop across valve. Differential valve comprises body with flow through inlet and flow through outlet. Gate can move between open and closed positions at pressure drop across valve. Flow through passage extends from flow through inlet to flow through outlet. Pressing element is made with possibility of pressing shutter to closed position to block flow through passage via flow through inlet. Pressing element comprises two springs arranged in parallel. One of said springs has resonance frequency differing from resonance frequency of other two springs. Invention also describes poppet valve, piston compressor, method of reducing or suppressing resonance of shock wave propagation in spring in differential valve and method of piston compressor operation.
EFFECT: group of inventions is aimed at reduction of resonance of shock wave propagation in springs.
19 cl, 7 dwg
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