The effect of valve lift on the load on the piston rod
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In the reciprocating compressor, the lift of the valve plates has been reduced by 30% compared to the original value. What impact does this have on the unit? Does the load on the rods increase, and does the shaft power increase as well?
This post was last edited by CHANGBAISHI on 2019-8-12 08:08. The stroke volume is related to the amount of flow that needs to be handled within a certain period of time! ! ! The original design might have included some margin, but what’s the purpose of cutting 30% off the lift? “Has the load on the rod increased, and accordingly has the shaft power also increased? ”Is it to increase these factors? ? Oh, there’s also an increase in inefficient work in terms of efficiency.
The 30% reduction was due to the frequent failure of the valve plates; now that the stroke has been reduced, the engine can no longer operate properly. I’m not sure if this is the cause of the problem.
As in the second floor, reducing the stroke alone indirectly reduces the flow area, increases the pressure loss of the valve, and thus lowers the cylinder flow rate. It may lead to an increase in inter-stage pressure and higher rod loads, but due to the decrease in gas volume, the power may actually decrease. I don’t think it’s a good idea. It is recommended to consult a professional valve manufacturer for a comprehensive renovation based on the actual operating conditions of the compressor.
You can also try reducing the spring tension while keeping the stroke constant, but for this you’ll need to consult a professional
If you’re not a professional designer, it’s better not to try. They are all things that involve direct contact, and if not handled properly, they can damage the equipment. Oh, and don’t touch things related to cylinder clearance. Your goal is after all to improve efficiency and reduce energy consumption, right? In my opinion, ensuring the equipment runs smoothly without any problems is the best way to save energy and reduce consumption.