Device capable of simply adjusting clearance volume of air cylinder

Abstract

The invention discloses a device capable of simply adjusting the clearance volume of an air cylinder, and relates to the field of compressors. The device comprises the air cylinder, a piston body and outer hexagon bolts. The air cylinder comprises an air cylinder cover and an air cylinder body. The piston body is located in the air cylinder. A skirt part of the piston body is provided with a piston pin to be connected with a piston rod. Two screw holes are formed in the end face of a top cover of the piston body and comprise the first screw hole and the second screw hole, the first screw hole and the second screw hole are connected to form a straight line to pass through the circle center of the end face of the top cover, and the first screw hole and the second screw hole are symmetric left and right relative to the circle center. The clearance volume is controllable under the situation that the appearance of the working air cylinder is not changed, increasing of the appearance size of the compressors is avoided, and the device can well adapt to multi-level compressors. The device has the beneficial effects of being scientific in design and reasonable in structure.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a device capable of simply adjusting the clearance volume of a cylinder. Background technique [0002] Because the working time and working intensity of the reciprocating compressor are particularly large, under long-term high-intensity work, there will be more or less a little looseness between the piston rod and the piston or between the piston rod and the crosshead. If there is no clearance volume between the pistons, a cylinder collision accident will occur between the piston and the cylinder, and if it is serious, the machine will be destroyed, and if there is no clearance volume, the piston will drain the gas in the cylinder every stroke. At this time, the valves of the inlet and outlet of the cylinder are particularly violent and unstable when they are opened, and the damage to the valves is relatively large. And the gas processed when the compressor is working is not 100% dry ...

AI Technical Summary

Problems solved by technology

[0002] Because the working time and working intensity of the reciprocating compressor are particularly large, under long-term high-intensity work, there will be more or less a little looseness between the piston rod and the piston or between the piston rod and the crosshead. If there is no clearance volume between the pistons, a cylinder collision accident will occur between the piston and the cylinder, and if it is serious, the machine will be destroyed, and if there is no clearance volume, the piston will drain the gas in the cylinder every stroke. At this time, the valves of the inlet and outlet of the cylinder are particularly violent and not stable when they are opened, and the damage to the valves is relatively large.

And the gas processed when the compressor is working is not 100% dry gas. The water vapor in the gas is liquefied during the compression process. Due to the incompressibility of the liquid, if there is no clearance volume in the cylinder, there will be a liquid hammer phenomenon. The compressor produces a huge shock, and a slight short-term abnormal shock may not be a big problem, but frequent long-term and heavy liquid shocks will deform, crack, or even break the compressor and directly damage the compressor

[0003] However, due to systematic errors in actual production, the actual clearance volume of the compressor after installation is often different from the originally designed clearance volume.

When the difference between the actual clearance volume and the design clearance volume is very large, it is necessary to reinstall the piston, because the mass of the piston is particularly large, and it is particularly inconvenient to install

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