Installation of the compressor small bearing (copper sleeve)
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I would like to ask how everyone installs small tiles Is there any good method? Every time we try to install it, we have to insert it slowly, and yet there is slight deformation. It’s difficult to insert the crosshead pin because the small bearings are made of copper alloy, which is relatively soft. I would like to ask how others go about installation – are there any good methods or ways to do it without causing deformation? Thank you in advance
Determine the fitting dimensions, then press it in using hydraulic tools, so that it remains basically unchanged in shape. Hydraulic tools are simple; you can make your own frame using channel steel or I-beams. The height of the press frame is determined by the size of the small tiles, the thickness of the connecting rods, and the height of the jack used.
The hydraulic method is not recommended, as it reduces the interference fit between the copper sleeve and the small-hole, and the inner diameter of the copper sleeve is prone to deformation; the best method is liquid nitrogen freezing
Of course, if the condition of cold installation is met, that would be absolutely ideal. But I personally believe that not all companies have the conditions for cold storage. In terms of practical techniques, the pressing method is likely to be the simplest and most convenient, and it is also safe and reliable.
We did this before; the small end caps were made of copper, and we had our own stamping equipment. Put the small tile in the freezer for a day and then press it in: lol. It’s better to press it directly. Also, as mentioned by the original poster, after replacing the small-head tiles, it is necessary to further process the inner hole in order to find the center of the crosshead; you surely won’t finish the installation without carrying out this processing step. How can concentricity be ensured like this? ? ?
I’ve learned it, thank you. We type in slowly over here, and in the end we have to polish it ourselves; it’s really tedious
I’ve learned that freezing it first is indeed a better approach than going straight into the processing step. The copper sleeves mentioned by you are all included as standard parts from the manufacturer; I’m not sure what exactly is meant by your so-called secondary processing – which part is being processed?
Reputable copper sleeve manufacturers provide a certain amount of allowance (that is, an allowance for machining the inner diameter), which is used for further adjustments after installation. You can calculate it by measuring the clearance fit; normally, we use a measurement of over 20 units for this. I don’t know about yours.
Well, I understand what you mean. But in our case, we had to insert it slowly, and that caused some deformation; the crosshead pin simply wouldn’t fit in. We had to use fine sandpaper to grind it, which was a tedious process – it took us several hours before it worked. I think it’s too much effort. I had to ask experts how they install it, as it’s really troublesome. So usually, if there aren’t any serious problems with the small tile, we don’t replace it, haha
Thank you for your answer, I’ve learned it