PISTON HYBRID ENERGY MACHINE WITH STEPPED SEAL Russian patent published in 2018 - IPC F04B19/06 F04B53/02 

FIELD: power engineering.

SUBSTANCE: invention relates to the field of power engineering, hydraulic and pneumatic devices, in particular for the gases and liquids compression and movement. Machine comprises a cylinder 1 and is located therein with a radial clearance δ₁ in the upper part there is a differential piston 2 with a rod 3 with the formation of the upper compressor 4 and the lower pumping 5 cavities. Cavity 4 has a dead volume V_M and is connected to the compressed gas source and consumer, respectively, through suction 6 and pressure 7 gas valves. Cavity 5 is with a source and a consumer of liquid through suction 8 and pressure 9 liquid valves. In the area of the cavity 5, there is a stepwise expansion of the cylinder 1 in the form of a recess 10 with the formation of a radial clearance δ₂ greater than the radial clearance δ₁. When the machine is running, the relation V_M=V₁-V₂ is executed, where V_M is the cavity 4 dead volume, V₁ is the volume of fluid flowing from the cavity 5 into the cavity 4 during the liquid compression and injection; V₂ is the volume of fluid flowing from the cavity 5 into the cavity 4 during the gas compression and injection. Above the piston 2 a layer of liquid is always present, wherein the thickness of this layer at the end of the gas compression process is equal to the linear dead volume L_M, which allows to obtain high pressure in one stage with no leakages at all. Continuous circulation of the fluid in the gap between piston 2 and cylinder 1 reduces their temperature.

EFFECT: enables the use of large gaps between the piston 2 and the cylinder 1, that is, to eliminate the possibility of the piston 2 jamming when starting the machine, to arrange good cooling of the gas and to increase the machine economical efficiency.

1 cl, 5 dwg