What is the principle of oil pressure regulation for the bearing housings of Shengyu centrifugal compressors and speed increase gearboxes? Thank you
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What is the principle of oil pressure regulation for the bearing housings of Shengyu centrifugal compressors and speed increase gearboxes? How do I adjust it? Each bearing box has a single main oil circuit; will raising the level of one affect the others? Thank you
There is an overflow valve on the pipeline after the pump; when the pressure is high, a portion of the fluid is automatically returned to the tank. The pressure at which fluid is returned can be adjusted manually (i.e., the inlet pressure to the gearbox). However, this valve is usually located on the main pipeline, so only the overall pressure can be adjusted
The compressors in our factory are from Shenyang Turbine & Pump Co., and there are three types of control valves: 1. The control valve at the oil pump outlet is a pneumatic solenoid valve, which is primarily used to regulate the pressure of the oil pump； 2. The main oil pipe control valve is also a pneumatic solenoid valve, used to regulate the oil pressure supplied to the bearings, that is, the oil pressure in the main oil pipe ； 3. There are three valves in total: the gearbox oil pressure control valve, and the oil pressure control valves for the motor’s front and rear bearings. Their principle is similar to that of piston valves; a screwdriver is used to adjust the length of a bolt inside the valve, thereby controlling the amount of oil that enters and achieving pressure regulation. All three of these valves are manually adjustable.
As long as the pressure in the main oil line reaches the value specified in the manufacturer’s instructions (usually around 3 Kg), increasing the pressure in either the centrifugal compressor or the speed increase gearbox will not affect the pressures in the other oil lines. Regarding the adjustment method, generally, the oil pipe control valves on SHENGU’s units are cone-shaped valves. All that needs to be done is to remove the plug at the top of the valve, loosen the outer locking cap slightly, then insert a screwdriver into the plug at the top of the valve to locate the slot, and thereafter adjust the oil pressure by increasing or decreasing it. When making adjustments, do so slowly while watching the pressure gauge on the oil pipe entering the bearing box. After adjustment, tighten the locking cap and the valve top plug.
As long as the pressure in the main oil line reaches the value specified in the manufacturer’s instructions (usually around 3 Kg), increasing the pressure in either the centrifugal compressor or the speed increase gearbox will not affect the pressures in the other oil lines. Regarding the adjustment method, generally, the oil pipe control valves on SHENGU’s units are cone-shaped valves. All that needs to be done is to remove the plug at the top of the valve, loosen the outer locking cap slightly, then insert a screwdriver into the plug at the top of the valve to locate the slot, and thereafter adjust the oil pressure by increasing or decreasing it. When making adjustments, do so slowly while watching the pressure gauge on the oil pipe entering the bearing box. After adjustment, tighten the locking cap and the valve top plug.