The pressure in the balance line of a screw compressor gradually decreases as operating time increases
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In a screw compressor, without adjusting the inlet pressure or the flow rate of the sealing gas, the pressure in the balance tube gradually decreases as operating time increases. After the machine was shut down for purging, the pressure in the balance pipe returned to normal once it was restarted. What could be the reason for this?
A drop in the pressure of the balance tube in a screw compressor can be caused by the following reasons: 1. Internal leakage in the balance tube: Prolonged operation may lead to wear of the seals inside the balance tube, resulting in a gradual decrease in pressure. 2. Internal compressor failures: Such as wear of rotating components or bearing problems, can lead to increased internal leakage. 3. Control system issues: Aging or failure of components in the control system may result in an inability to properly control the balance pressure. The shutdown purge may have removed some blockages or carbon deposits, allowing smooth gas flow within the balance tube and thus restoring pressure. Further inspection is required to check the sealing of the balance tube and its related components, as well as to verify whether the control system is functioning properly. If the problem persists, it may require a professional technician to conduct a more thorough inspection and repair. .
It is related to the impurity level in the gas medium; it is recommended to inspect and clean the filter. You might want to give it a try as a reference.
It was indeed considered that the medium might be carrying particles, but previously when the medium contained particles there was no issue with the drop in pressure in the balance tube; this problem only appeared recently.
Filtering facilities need to be inspected and cleaned regularly or at any time, as they may become clogged or damaged. For reference.