Optimization Research And Analysis Of The Head Seal Structure Of The Diaphragm Compressor Cylinder

Diaphragm compressor is in the form of large compressor, because of the special structure of the cylinder does not require lubrication, sealing performance is very good, compressed medium is not in contact with any lubricant, so you can compress the high purity of the gas, the general can reach 99.999% purity than is suitable for compression and delivery of all kinds of precious rare gas. In addition, for the strong corrosive, radioactive, toxic, explosive gas, it is particularly suitable for the use of diaphragm compressor. Diaphragm type compressor cylinder and good heat dissipation, the higher compression ratio, so the pressure range wide, exhaust pressure up to 300 MPa for food industry, petroleum industry, chemical industry, electronic industry, nuclear power, aerospace, military equipment, medicine, research and other fields. Due to the technology, manufacturing, transportation, repairing, assembling and dismantling the inner parts of the need, diaphragm compressor cylinder head are often designed to detachable structure, detachable end must use high-pressure sealing device. Usually, a high pressure diaphragm compressor sealing devices accounted for about 10% of the total weight of the container or 30%, while the cost is up to the corresponding 15%~40%. High pressure sealing device sealing performance and manufacturing economy quality of diaphragm compressor with the effect and the safety of production has great influence. Therefore, the design of high pressure sealing device is an important problem in the production and use of diaphragm compressor.Through the Jiangsu permanent group production of G06.42-50 diaphragm type compressor cylinder head sealing structure in only by the preload, ideal sealing state and the actual conditions of the three-layer O-shaped sealing ring not failure, only the first layer of O sealing ring failure and one and two layer sealing ring all failure when the stress of ANSYS simulation, and draws a conclusion that the various components should stress distribution and strain distribution, and theoretical analysis of the stress distribution of rationality. The change of load load load load load distribution in the cylinder block and cylinder head is under the same load generated stress load distribution is not the same, and the cylinder body sealing surface and the cylinder cover cover their stress characteristics, and the cylinder body sealing surface overall stress load value is relatively small, but in the first seal groove at the position of stress changes larger span, the cylinder head overall stress value is larger, but in the second seal groove position of the stress changes of small span of three sealing groove in the first sealing groove position compared with stress and the groove bottom stress distribution is relatively complex, the sealing surface structure in a dangerous point of sealing effectiveness of adverse effects.The three sealing groove is located on the cover of the two laws Lanmi radial should force loading data extraction and structural sealing surface stress distribution curve, the observation and analysis of the rules and find out the cylinder, cylinder cover sealing surface and three seal groove at the position of the stress distribution characteristic, find out which should force load is large or force changes in the span of large parts of the analysis of the stress in the sealing surface of the radial variationtrend, put forward corresponding suggestions for improvement, so that the sealing surface radial should load distribution optimization for the cylinder head sealing structure sealing effectiveness to a corresponding increase.