Hydraulic push the oil piston (to the top) drives the connecting rod connecting rod movement, toggle rotation, push rod (thimble) with rotary ring on the slope top notch or falling, the low pressure (suction) valve lift or drop, so as to achieve the purpose of suction or close the intake. Then from the piston to the upper reaches of the exhaust pressure (high pressure), the top of the exhaust valve, compressed gas into the exhaust chamber, and then into the exhaust pipe. This is how to rely on the power of the hydraulic pressure to drive the connecting rod and the rotating ring, so that the top of the rod or drop the suction valve working principle.
     When the piston runs to the lower limit (sink), when the cylinder volume is the largest, the minimum pressure, low pressure is greater than the cylinder pressure from the top of the suction valve plate and into the cylinder.           Driven by oil pressure unloading device (energy regulation device), when the energy at the neutral position of the regulating handle, tubing to piston oil unloading device is closed, no hydraulic oil piston drives the connecting rod, the push rod at the top, a suction valve sheet is pushed up, although low pressure gas from the cylinder around the air inlet into the cylinder, but because of the suction valve is always unable to fall from the top down, when the gas pressure can turn the piston back into the hole, thus reach the purpose of compression. When the handle of a certain level of energy regulation capacity, oil into the cylinder, push the oil driven piston connecting rod, the push rod of the rotary ring down to the depths of the slope, a suction valve sheet drop, low pressure gas on the piston to the cylinder pressure is reduced and the top suction valve sheet into the cylinder from the holes around the cylinder.      When the piston gradually to the limit (up) when running, the volume in the cylinder decreases gradually, gradually increasing the pressure, when the pressure is higher than the low pressure, cylinder pressure (compressed gas) the suction valve pressure by closing the intake piston, continue to run the first time, the cylinder pressure rise to high pressure (exhaust valve) and pressure from the top the exhaust valve, the compressed gas enters the high-pressure chamber (exhaust), and then by subsequent compressed gas exhaust pipe to promote circulation, which is the piston type compressor (reciprocating) work (compression) process (principle).
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