Reciprocating compressor
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There is a symmetric hydrogen reciprocating compressor with a total of three compression stages; the piston rings in the first and second stages wear out frequently, within three to four days, which prevents the pressure from rising. Let’s analyze together what causes this.
1: Check whether the installation dimensions of the piston rings are appropriate? 2. Consider upgrading the material of the piston rings
Is it a new machine? 1. After checking the dimensions and gaps mentioned above, check the dimensions of the support ring as well. 2. Check the roughness of the inner wall of the cylinder liner.
It is necessary to clearly distinguish whether this is a new problem that has arisen with new devices, or a new problem encountered by existing devices. The former refers to potential design and installation issues with the equipment. The latter should be overhauled. Also, for the spare parts purchased, it is useful to know whether they are supplied by the equipment manufacturer itself or from other sources, as well as any potential quality issues that may exist. It would be best to send a picture to see the installation structure of the piston rings on the piston. There is a design issue involving the addition of spring coils inside the damaged piston.
It’s an old machine that used to work perfectly; the inner walls of the cylinders are smooth with no signs of wear.
Has there been a situation in the past where there was severe filler leakage and air got into the bearing box?
First, check whether the material of the piston rings and support rings has been changed, whether the intake and exhaust temperatures are too high, the reverse angle of the crosshead, the temperature of the bearing shells, and the clearances of the large and small end bearings. Identify the cause step by step.
Installation should be no problem; the material has never changed.
1. Is the mating surface (cylinder or cylinder liner) rough? 2. Is there any foreign object between the piston ring and the mating surface? 3. Is there anything abnormal with the material of the piston rings, such as being too brittle or having delamination?