Chemical Process Equipment Area: [Weekly Topic] What is the function of a pressure regulator and where is it installed? (2011.5.23~5.29)
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This post was last edited by salesment on 2011-5-23 16:18. A pressure reservoir is often installed in the oil system of an engine unit. Questions: 1. Specific functions; 2. Specific installation location. Additionally, in some of our oil systems, the delayed automatic start-up of the auxiliary oil pump prevents the unit from continuing to operate properly in case of a problem with the main pump. What solutions do you all have in this situation? Those who post excellently will receive an additional reward of 10 to 50 wealth points or an equivalent amount of charm points.
Answer: An accumulator (also known as a storage tank) is used to stabilize the system’s oil pressure, preventing fluctuations in the pressure of the lubricating oil (or control oil) that could affect the operation of the compressor. It generally provides temporary oil supply to the oil system during the switching between the main and auxiliary oil pumps, to prevent the oil pressure from dropping too low. The oil system consists of an oil tank, oil pump, oil cooler, accumulator, oil filter, etc. The accumulator, installed as described above, provides lubrication (control) oil to the main oil supply pipe in emergency situations.
Regarding the location of the accumulator, I mainly want to know the front-to-back relationship between the accumulator and the pressure gauge (the pressure transmitter with interlock alarm).
This post was last edited by sean816 on 2011-5-23 at 15:10. This device is usually installed together with diesel generators
Personal opinion: 1. Since most oil pumps nowadays are screw pumps, their flow rate is relatively stable. The accumulator is primarily used to reduce the impact of sudden situations such as reverse pumping and voltage fluctuations on oil pressure ； 2. The installation location should be before the pressure transmitter. Since the purpose of installing a pressure transmitter is to monitor the oil pressure entering the unit, which is related to the safety of the unit, the more stable this pressure is, the better. When there are fluctuations in the oil circuit pressure, pressure compensation by the accumulator is required first to ensure oil pressure stability. If it is installed behind the pressure switch, it is possible that the oil pressure at the rear end will not be high enough to trigger an alarm or cause the system to shut down; however, the instantaneous oil pressure at the pressure detection point may still be below the alarm or interlock value, which will result in the system shutting down.
The internal structure of the accumulator in the compressor oil circuit is very simple; it is a rubber bladder. The interior of the casing is filled with nitrogen, at a pressure that is 0.75 times the pressure in the lubricating oil main line. When the lubricating oil pump starts, the outside of the bladder is filled with lubricating oil. Its function is to cause the bladder to expand rapidly when the oil pressure drops suddenly, thereby providing immediate compensation for the lubricant pressure. For example, when switching the lubricating oil pump, filter, and oil cooler. Generally, the accumulator should be filled with nitrogen before the pressure compressor is put into operation, and do not forget to open the manual valve located below the accumulator. The accumulator primarily serves to stabilize pressure, and is commonly used in oil systems, after the filter.
I. Functions: 1. Serve as an auxiliary power source. 2. Maintain pressure and compensate for leaks. 3. Mitigate shocks and absorb pressure fluctuations. II. Installation and use of accumulators: 1. Air-filled accumulators should be installed vertically, with the oil port facing downward. 2. The accumulator used to absorb hydraulic shocks and pressure pulsations should be installed as close as possible to the source of vibration. 3. The accumulators installed on the pipelines must be fixed using brackets and supports. 4. A check valve should be installed between the accumulator and the hydraulic pump to prevent the pressurized oil stored in the accumulator from flowing back and causing the pump to rotate in the reverse direction when it stops. 5. A stop valve should be installed between the accumulator and the piping for inflation and maintenance purposes.
This post was last edited by sean816 on 2011-5-23 21:56. Hydraulic accessories used for storing hydraulic energy and absorbing pressure fluctuations as well as shock pressures. The oil system consists of an oil tank, an oil pump, an oil cooler, an accumulator, an oil filter, etc. The accumulator is installed as described above, and it provides lubricating (control) oil to the main oil supply pipeline in emergency situations.
The accumulator is primarily used to maintain the stability of the control oil, preventing fluctuations in control oil pressure that can occur due to pump switching or power fluctuations; it is generally installed on the main control oil pipeline.
Reply to 1# sean816: A reservoir, also known as an energy storage device, is installed to maintain stable pressure in the lubricating oil system. Under normal circumstances, nitrogen at around 4 kg/cm2 is used for lubrication for a short period of time (10 minutes) when the lubricating oil pressure is low, such as when the oil pump stops. Ensure the equipment is functioning properly. It is generally installed behind the filter cooler in the lubricating oil system.
Specific function of the accumulator: to absorb and stabilize pressure, convert it into control oil pressure, and reduce errors in the governor’s regulation of the unit； Specific installation location: It is generally installed behind the filter, on the pipeline near the oil-driven motor; the nitrogen pressure in the accumulator is usually around 0.6 MPA.