Unit oil transportation

(1) Cleaning the oil station and its related equipment: The engine’s oil sumps, fuel tanks, oil filters, oil pumps, valves, etc. should be disassembled and cleaned to remove rust, dust, paint, welding slag, burrs, iron shavings, oil stains, and other contaminants; the interiors of the equipment connected to the engine must also be thoroughly cleaned. (2) Disconnect the connection pipe between the lubricating oil pipeline and the machine’s moving components, and install a temporary pipeline to route the flushing oil around the machine’s bearing shells ； And install stainless steel filters with a mesh size of 100–200 mesh at the oil return ports of each temporary pipeline. (3) Before injecting flushing oil, the interior of the main fuel tank and the high-level fuel tank should be thoroughly cleaned; wipe it clean with new cotton cloth, and then use dough to remove any remaining residues. And temporary pipelines are used to integrate the oil pipes of the high-level fuel tank into the oil flushing system. (4) Remove the filter element from the oil station filter; once the oil circulation is satisfactory, reinstall the filter element and put it into use. (5) Connect a temporary pipeline to the oil drain port of the oil cooler to drain the oil, either to another container or back into the fuel tank, in order to prevent dirt from accumulating inside the oil cooler. (6) Add temporary cross-lines for direct oil return at each bearing oil inlet pipe, and install 120–200-mesh stainless steel filters at these locations. (7) The oil pump should rotate smoothly.

Thank you. It has been running for over a month, but there are still obvious impurities

It can be said to be quite comprehensive. As a supplementary note, when transporting oil, a wooden stick can be used to tap the oil pipelines in order to remove rust and other debris attached to the pipe walls.

Run it with the filter element in place; replace the filter on the pipeline every hour, and replace the filter element when it becomes dirty. If you want it fast, don’t be afraid of the hassle; keep an eye on it, and it will be done quickly.

Prepare ten or eight sets of filter elements; replace them when they get dirty, and the replaced ones can be used again after being cleaned.

1 Purging Purpose 1.2.1 Commissioning of the lubricating oil system purging cycle 1.2.1.1 Preparatory work before cleaning the oil circuit system  Instruments such as pressure gauges, thermometers, level gauges, and transmitters on site have been calibrated, installed in place, and are operational；  The fuel tank should be thoroughly cleaned before flushing; during the cleaning process, it should be wiped clean with a white cotton cloth, and then cleaned further with plain dough.  The main and auxiliary oil pumps were disassembled, inspected, cleaned, and found to be free of debris. 1. Pour 46# turbine oil into the fuel tank using an oil filter; ensure that the oil level does not exceed the maximum fill line. During the filling process, it is possible to conduct a low oil level alarm test for the tank.  Remove the original filter element and install a 200-mesh temporary filter; ensure that filters are installed at the inlets of both the main and backup pumps. Short-circuit the oil supply and return pipes for the motor’s front and rear bearings, the gearbox, the radial bearings of the main fan, as well as the front and rear bearings of the exhaust fan. Do not supply oil to the various lubrication points of the equipment for now; install a temporary filter on the return oil pipes. 1.2.1.2 Test run of the lubricating oil pump motor  Run the motor without load for 2 hours; the rotation direction of the motor should be consistent with the direction required by the pump.  The temperature rise of the bearing (rolling bearing) shall not exceed 40°C.  The vibration value meets the specifications.  After the motor passes the trial operation, recheck that the concentricity between the pump and the motor meets the manufacturer’s specifications, and connect the coupling between the motor and the pump. 1.2.1.3 Improve the lubricating oil system flow  Close all high-point and low-point vent valves.  Open the high-level fuel tank filling valve and its associated line valve.  Close the main pipe oil pressure control valve. One set each for the filter and the cooler.  Open the oil filter, cooler connection valve, and vent exhaust valve.  The bypass valve of the pump outlet control valve is fully open.  Open the inlet and outlet valves of the main and auxiliary oil pumps.  The auto-start interlock switch for the main and auxiliary oil pumps is set to the manual position.  Start the oil pump to circulate the oil.  Gradually close the pump outlet control valve and the return line valve to the oil tank.  Use secondary voltage control to adjust the pressure of the oil collection main pipe to 0.25 Mpa.  Verify that the oil pressure has been adjusted to the required level. 1.2.1.4 Oil system flushing cycle  When establishing the cycle, it is necessary to check for leaks at the flanges and all connection points.  The leak site should be dealt with promptly.  If the system is operating normally, the primary and backup pumps can operate in alternation.  Verify and inspect the operating condition of the pumps.  During flushing, increase the flow rate and volume as much as possible to fill the pipeline system with oil.  Also strike the pipeline welds and elbows with a wooden hammer or rubber mallet.  During the cycling process, the oil temperature is raised and lowered repeatedly 2–3 times every 8 hours, staying within the range of 40–70°C.  Coolers and filters, as well as valves, need to be turned on and off and switched regularly during the flushing process.  The upper fuel tank can be flushed by gravity during idle periods.  During the flushing process, the filter screen should be cleaned based on changes in the filter’s differential pressure.  The acceptance criteria for rinsing are as follows: no metal particles or rust on the filter screen ； No more than two soft particles and a small amount of fibrous bodies are visible per square centimeter.  Sampling at the lowest point of the fuel tank yielded satisfactory analysis results.  When the oil flushing meets the requirements, the flushing oil is filtered and removed.  Clean the fuel tank thoroughly, then pour the oil into it using a fuel filter.  Remove the temporary short pipe and filter screen, and restore the regular pipeline.  Insert the filter element into the filter.  Install temporary filters in each bearing of the unit, and continue with the flushing cycle.  Repeat the above steps to continuously remove debris from the filter element. When no visible debris remains on the filter element, and when there is no change in the differential pressure of the oil filter over 5 hours, and the quality of the oil tested is satisfactory, it is considered that the cleaning process is complete.  Once the oil quality is satisfactory, remove the temporary filter.  Drain the oil from the fuel tank, filter, and oil cooler.  Clean the fuel tank and refill it with fuel.

Can this be fast? If you want it to be faster, pay more attention to cleaning during pipeline installation, and also put in extra effort when cleaning the fuel tank! The most troublesome part is cleaning the filter screen!

Maintain good hygiene during repairs, and oil transportation will be fast thereafter

Replace the filters frequently, keep the oil temperature and pressure under control. Inspection personnel on site should use hammers to tap the lubrication pipes from time to time. There is no truly good and quick solution; oil transportation is a slow process – I’ve seen cases where it took two or three months to complete. . .