Lubricating oil pump
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Hello, fellow sailors. I would like to ask: what should the oil temperature be when starting the lubricating oil pump, in degrees above minimum? (Only related to the heating operation of the oil) ? Check the following conditions: Oil level > min. (Only relevant to the heating of the oil) Oil temperature < max? Oil temperature > min? Oil pressure > min? Oil quantity > min? (Required only in some special cases) Please provide explanations for these issues, along with a detailed explanation of the principles behind them – why is this done? Thank you to all the sea friends! ! !
This post was last edited by qiuqiu0810 on 2015-8-13 at 17:56. This is a rather broad question, as different devices and different oil pumps have varying requirements regarding oil temperature and pressure. Generally, the oil level should not be lower than 1/2 of the tank’s capacity; it is usually kept between 1/2 and 2/3 of the tank’s capacity, in order to ensure proper cooling without running out of oil； Oil temperature < max? When starting the oil pump, the oil temperature should not exceed that during normal operation; generally, it is advisable for it to be about 5 degrees lower than the normal oil temperature ； Oil temperature > min? When starting the lubricating oil pump, the oil temperature must not be lower than the normal operating temperature by 10 degrees; this is mainly due to considerations related to the viscosity of the oil ； Is the oil pressure greater than the minimum value? The oil pressure level is required to ensure the proper operation of the equipment; it varies depending on the type of equipment, but it must be above the alarm threshold at all times. Is the oil volume > min? In the same pipeline, the level of oil pressure determines the amount of oil. This is my personal understanding for reference only!
It is all specified in the equipment operation manual; it is necessary to follow the instructions provided by the manufacturer strictly, as different devices have varying requirements regarding lubricants and other operational parameters!
When the oil pump is running, the oil level in the tank should be normal, the valves in the oil circuit should be open, and the oil temperature should also be normal.
Additional note: Oil temperature in hot standby mode: The lubricating oil temperature in heat engines is generally set around 50°C, while in non-heat engines (such as bearing housings), it is usually between 36 and 40°C℃； The lubricant level is determined primarily based on cooling requirements, as well as to leave space for the (electric) heater. That is, the minimum liquid level should generally be no lower than the height of the heater to prevent carbonization.
Oil temperature and oil pressure are very important for lubrication; they are involved in interlock mechanisms. Additionally, low oil temperature plays a role in the startup of the unit. As for oil level, it is sufficient to have alarms in place – generally, the level is monitored on-site using a gauge, and oil is added as needed. Regarding the amount of oil, if it refers to the supply volume, it is recommended that this value also be included in the interlock mechanisms~~
Typical units have parameters such as the minimum starting temperature for the lubricating oil, the lubricating oil pressure (normal value, alarm value, shutdown value, and value at which the auxiliary oil pump starts), as well as the oil level. All these values need to be adjusted in accordance with the equipment’s manual