Independent oil pre-feeding system for whole low-speed diesel engine

Abstract

The utility model relates to the technical field of oil pre-feeding systems, and discloses an independent oil pre-feeding system for a low-speed diesel engine complete machine, which comprises a diesel engine main machine, an oil conveying pipe is arranged on the left side of the diesel engine main machine, and an oil return pipe is arranged on the right side of the diesel engine main machine; the lubricating oil tank is arranged at the right end of the oil return pipe, an online monitoring module is installed on the left side of the upper surface of the oil return pipe, a polymer filter is installed in the middle of the oil return pipe, and a circulating pump is installed on the right portion of the oil return pipe; the oil passes through the first coarse filter, the magnetic filter and the first fine filter and then returns to the lubricating oil tank through the oil return pipe. The magnetic filter is mainly used for adsorbing iron particles, and other filters are mainly used for adsorbing other impurities. And an online monitoring module is additionally arranged, so that the temperature, the pressure and the oil product granularity are detected in real time. The oil tank is externally connected with a lubricating oil purifier, when the granularity is detected to exceed the standard, action is carried out, lubricating oil self-purification is carried out, and the quality of oil entering a main machine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-oiling systems, in particular to an independent pre-oiling system for a low-speed diesel engine. Background Art

[0002] Oiling is an important step in the assembly process of low-speed diesel engines. Its purpose is to flush fuel and lubricating oil to eliminate possible impurities such as iron filings and hard particles, ensure the cleanliness of the main engine, and avoid abnormal wear and failure of important parts (such as crankshaft, crosshead pin, piston, injection pump, etc.) when the diesel engine is running; check the installation condition of the oil circuit to ensure the smooth progress of the main engine test run.

[0003] At present, diesel engine oiling is carried out through the auxiliary system, as follows: the whole machine is closed on the test bench, the piston centering work is completed, and after manual internal cleaning, the whole machine oiling and flushing are carried out. From the oil tank of the auxiliary system, the fuel / lubricating oil passes through the pump, oil pipeline, control valve, coarse / fine filter to enter the diesel engine, and then circulates inside the main engine before returning to the oil tank. A magnetic induction heater is installed in the oil tank, and the lubricating oil is internally circulated and purified by the oil separator module after long-term use. Since the oiling path of the entire auxiliary system is very long, it involves many oil tanks, pumps, pipelines, valves, and filters; the oil tank and pipeline are made of carbon steel, and some are buried underground. Because the fuel / lubricating oil cannot completely fill the entire pipeline, it is easy to rust after a long operation time. This results in a long oiling cycle and uncontrollable quality. If you encounter a strict customer (no impurities in the oiling net bag), you cannot control the oiling time, which causes the main engine to occupy the test bench for too long, affecting the company's overall production plan. At present, the only way to temporarily improve the cleanliness of oil injection is by frequently replacing filter elements, removing and cleaning some pipes (non-buried pipes) of the main engine and auxiliary engine systems, which is very time-consuming and labor-intensive. At the same time, since the lubricating oil temperature for oil injection needs to reach 55-65℃, the oil in the entire oil tank (80M3) must enter the circulation, and the energy consumption required for heating (especially in winter) is also a large value. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides an independent pre-oiling system for a low-speed diesel engine to solve the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model provides the following technical solution: an independent pre-oiling system for a low-speed diesel engine, comprising:

[0008] A diesel engine main engine, wherein an oil delivery pipe is installed on the left side of the diesel engine main engine, an oil return pipe is installed on the right side of the diesel engine main engine, and a main lubricating oil pipeline and a crosshead lubricating oil pipeline are installed on the upper and lower parts of the left side of the oil return pipe respectively;

[0009] The lubricating oil tank is arranged at the right end of the oil return pipe, an online monitoring module is installed on the left side of the upper surface of the oil return pipe, a polymer filter is installed in the middle of the oil return pipe, and a circulation pump is installed on the right side of the oil return pipe;

[0010] The lubricating oil purifier is arranged on the right side of the lubricating oil tank, the lubricating oil purifier is connected to the surface of the lubricating oil tank through a pipeline, and an oil inlet pipe is installed at the bottom of the lubricating oil tank;

[0011] A first fine filter is arranged on the surface of the oil inlet pipe, a discharge pump is arranged on the left side of the first fine filter, a magnetic filter is arranged on the left side of the discharge pump, a first coarse filter is arranged on the left side of the magnetic filter, and the discharge pump, the magnetic filter and the first coarse filter are all installed on the surface of the oil inlet pipe;

[0012] The second coarse filter is arranged on the right side of the surface of the oil pipeline. A boost pump is installed in the middle of the surface of the oil pipeline. A second fine filter is installed on the left side of the surface of the oil pipeline. A fuel tank is installed at the left end of the oil pipeline. A return oil pipe is also installed between the fuel tank and the diesel engine main engine.

[0013] Preferably, a liquid level observation tube is installed on the surface of the oil inlet pipe, and liquid level scale lines are engraved on the surface of the liquid level observation tube, so that the staff can conveniently observe the amount of oil transported by the oil inlet pipe through the liquid level observation tube.

[0014] Preferably, a pressure sensor is installed on the surface of the oil return pipe, and the sensing end of the pressure sensor extends into the inner cavity of the oil return pipe. The pressure in the oil return pipe can be detected by the pressure sensor, thereby preventing the oil return pipe from being damaged due to a large amount of oil transported by the oil return pipe.

[0015] Preferably, a centrifugal pump is installed on the surface of the pipeline between the lubricating oil purifier and the lubricating oil tank, and the purified oil in the lubricating oil purifier can be transported to the lubricating oil tank through the centrifugal pump.

[0016] Preferably, a adding pipe is installed on the upper surface of the lubricating oil tank, and an oil drain pipe is installed on the lower part of the lubricating oil tank. Lubricating oil can be added to the lubricating oil tank through the adding pipe, and the oil in the lubricating oil tank can be drained through the oil drain pipe, thereby making it convenient for staff to replace the oil in the lubricating oil tank.

[0017] Preferably, a liquid level observation plate is installed on the right side of the lubricating oil tank. The liquid level observation plate is transparent and has scale lines engraved on its surface. The amount of oil inside the lubricating oil tank can be observed through the liquid level observation plate, and the quality of the oil inside the lubricating oil tank can also be observed, so as to replace the oil inside the lubricating oil tank.

[0018] Beneficial Effects

[0019] Compared with the prior art, the utility model provides an independent pre-oiling system for a low-speed diesel engine, which has the following beneficial effects:

[0020] 1. This independent pre-oiling system for low-speed diesel engines is used. The lubricating oil is pressurized by a circulating pump from the lubricating oil tank and then passes through a polymer filter. It then enters the main engine in two ways, one into the main lubricating oil pipeline and the other into the crosshead lubricating oil pipeline. After being flushed inside the main engine, the oil returns to the lubricating oil tank through the return oil pipe through the first coarse filter, the magnetic filter and the first fine filter. If the return oil pressure is too low, the discharge pump can be started to increase the return oil pressure. The magnetic filter is mainly used to adsorb iron particles, and other filters are mainly used to adsorb other impurities. An online monitoring module has been added to detect temperature, pressure and oil particle size in real time. The oil tank is connected to an external lubricating oil purifier. When the particle size exceeds the standard, it will be activated to perform self-cleaning of the lubricating oil to ensure the quality of the oil entering the main engine.

[0021] 2. This independent pre-fueling system for low-speed diesel engines is used. After the fuel is pressurized by the booster pump, it enters the diesel engine through the second coarse filter and the second fine filter, and then returns to the fuel tank through the oil return pipe, which greatly simplifies the overall oiling path. At the same time, the pipeline and the tank are made of 304 stainless steel, which can effectively control the rust of the pipeline and shorten the oiling time. In addition, there are few pipelines, which is very convenient even for disassembly and cleaning. The capacity of the pre-fueling tank is 10M3, which is 87.5% smaller than the original auxiliary system tank. The heater power is 25KW*2, which is 90% lower than the original auxiliary system heater power, which can greatly reduce the system energy consumption during the oiling stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the oil injection structure of the pre-oil injection lubricating oil system of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the lubricating oil system of the utility model;

[0025] Figure 4 It is a schematic diagram of the oil injection structure of the pre-oil injection fuel system of the utility model.

[0026] In the figure: 1. diesel engine main engine; 101. oil pipeline; 2. oil return pipe; 3. lubricating oil tank; 4. online monitoring module; 5. polymer filter; 6. circulation pump; 7. lubricating oil purifier; 8. oil inlet pipe; 9. first fine filter; 10. discharge pump; 11. magnetic filter; 12. first coarse filter; 13. second coarse filter; 14. boost pump; 15. second fine filter; 16. fuel tank; 17. liquid level observation tube; 18. pressure sensor; 19. centrifugal pump; 20. addition pipe; 21. oil drain pipe; 22. liquid level observation plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] This utility model provides a technical solution for an independent pre-oiling system for a low-speed diesel engine. Figure 1 , comprising a diesel engine main engine 1, an oil delivery pipe 101 is installed on the left side of the diesel engine main engine 1, an oil return pipe 2 is installed on the right side of the diesel engine main engine 1, and a main lubricating oil pipeline and a crosshead lubricating oil pipeline are installed on the upper and lower parts of the left side of the oil return pipe 2 respectively;

[0029] See also Figure 2 , a lubricating oil tank 3 is arranged at the right end of the oil return pipe 2, an online monitoring module 4 is installed on the left side of the upper surface of the oil return pipe 2, a polymer filter 5 is installed in the middle of the oil return pipe 2, and a circulation pump 6 is installed on the right side of the oil return pipe 2;

[0030] The lubricating oil purifier 7 is arranged on the right side of the lubricating oil tank 3. The lubricating oil purifier 7 is connected to the surface of the lubricating oil tank 3 through a pipeline. An oil inlet pipe 8 is installed at the bottom of the lubricating oil tank 3.

[0031] A first fine filter 9 is arranged on the surface of the oil inlet pipe 8. A discharge pump 10 is arranged on the left side of the first fine filter 9. A magnetic filter 11 is arranged on the left side of the discharge pump 10. A first coarse filter 12 is arranged on the left side of the magnetic filter 11. The discharge pump 10, the magnetic filter 11 and the first coarse filter 12 are all installed on the surface of the oil inlet pipe 8.

[0032] See also Figure 4The second coarse filter 13 is arranged on the right side of the surface of the oil delivery pipe 101, a booster pump 14 is installed in the middle of the surface of the oil delivery pipe 101, a second fine filter 15 is installed on the left side of the surface of the oil delivery pipe 101, a fuel tank 16 is installed at the left end of the oil delivery pipe 101, and a return oil pipe 2 is also installed between the fuel tank 16 and the diesel engine main engine 1;

[0033] The lubricating oil is pressurized by the circulation pump 6 from the lubricating oil tank 3 and passes through the polymer filter 5. Then it enters the main engine in two ways, one way into the main lubricating oil pipeline and the other way into the crosshead lubricating oil pipeline. After being flushed inside the main engine, it returns to the lubricating oil tank 3 through the return oil pipe through the first coarse filter 12, the magnetic filter 11, and the first fine filter 9. If the return oil pressure is too low, the discharge pump 10 can be started to increase the return oil pressure. The magnetic filter 11 is mainly used to adsorb iron particles, and other filters are mainly used to adsorb other impurities. An online monitoring module 4 is added to detect temperature, pressure and oil particle size in real time. The oil tank is connected to an external lubricating oil purifier 7. When it detects that the particle size exceeds the standard, it will act to perform self-cleaning of the lubricating oil to ensure the quality of the oil entering the main engine.

[0034] After being pressurized by the boost pump 14, the fuel enters the diesel engine main unit 1 through the second coarse filter 13 and the second fine filter 15, and then returns to the fuel tank 16 through the oil return pipe 2 of the fuel tank 16, thereby effectively solving many problems of oil injection in the original auxiliary engine system.

[0035] See also Figure 3 A liquid level observation tube 17 is installed on the surface of the oil inlet pipe 8, and a liquid level scale line is engraved on the surface of the liquid level observation tube 17. The liquid level observation tube 17 can facilitate the staff to observe the amount of oil delivered by the oil inlet pipe 8.

[0036] A pressure sensor 18 is installed on the surface of the oil return pipe 2. The sensing end of the pressure sensor 18 extends into the inner cavity of the oil return pipe 2. The pressure sensor 18 can detect the pressure in the oil return pipe 2, thereby preventing the oil return pipe 2 from being damaged due to a large amount of oil transported.

[0037] A centrifugal pump 19 is installed on the pipeline surface between the lubricating oil purifier 7 and the lubricating oil tank 3 , and the centrifugal pump 19 can transport the purified oil in the lubricating oil purifier 7 to the lubricating oil tank 3 .

[0038] An adding pipe 20 is installed on the upper surface of the lubricating oil tank 3, and an oil drain pipe 21 is installed at the lower part of the lubricating oil tank 3. Lubricating oil can be added to the lubricating oil tank 3 through the adding pipe 20, and the oil in the lubricating oil tank 3 can be discharged through the oil drain pipe 21, so that it is convenient for the staff to replace the oil in the lubricating oil tank 3.

[0039] A liquid level observation plate 22 is installed on the right side of the lubricating oil tank 3. The liquid level observation plate 22 is transparent and has scale lines engraved on its surface. The amount of oil inside the lubricating oil tank 3 can be observed through the liquid level observation plate 22, and the quality of the oil inside the lubricating oil tank 3 can also be observed, so as to replace the oil inside the lubricating oil tank 3.

[0040] In this device, the lubricating oil is first pressurized by the circulation pump 6 from the lubricating oil tank 3 and then passes through the polymer filter 5. Then, it enters the main engine in two ways, one way enters the main lubricating oil pipeline, and the other way enters the crosshead lubricating oil pipeline. After being flushed inside the main engine, the oil is returned to the lubricating oil tank 3 through the return oil pipe through the first coarse filter 12, the magnetic filter 11, and the first fine filter 9. If the return oil pressure is too low, the discharge pump 10 can be started to increase the return oil pressure. The magnetic filter 11 is mainly used to adsorb iron particles, and the other filters are mainly used to adsorb other impurities. An online monitoring module 4 is added to detect the temperature, pressure and oil particle size in real time. The oil tank is connected to an external lubricating oil purifier 7. When the particle size is detected to be excessive, it will be activated to self-clean the lubricating oil to ensure the quality of the oil entering the main engine.

[0041] After being pressurized by the boost pump 14 , the fuel enters the diesel engine main unit 1 through the second coarse filter 13 and the second fine filter 15 , and then returns to the fuel tank 16 through the fuel return pipe 2 of the fuel tank 16 .

[0042] After the implementation of the new oil injection equipment and process, many problems of oil injection in the original auxiliary system were effectively solved:

[0043] 1. Cleanliness and time control: Since the overall oiling path is greatly simplified, and both the pipeline and the oil tank are made of 304 stainless steel, the rust of the pipeline can be effectively controlled and the oiling time can be shortened. In addition, there are few pipelines, so it is very convenient to disassemble and clean.

[0044] 2. Energy consumption control: The pre-oil tank capacity is 10M3, which is 87.5% smaller than the original auxiliary system tank. The heater power is 25KW*2, which is 90% lower than the original auxiliary system heater power. This can greatly reduce the system energy consumption during the oil injection stage.

[0045] 3. Plan control: The pre-oiling system covers two pre-assembly stations and can be switched flexibly. Even if an abnormal situation occurs in a main engine, it can be switched to another main engine for oiling immediately. Moreover, the oiling problem is solved at the pre-assembly station, and the test station can start the train after a quick oil pressure check, which greatly shortens the test station occupancy period of the 5X72DF main engine by at least 5 days, making mass production possible.

[0046] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An independent pre-oiling system for a low-speed diesel engine, characterized in that: include: A diesel engine main engine (1), wherein an oil delivery pipe (101) is installed on the left side of the diesel engine main engine (1), an oil return pipe (2) is installed on the right side of the diesel engine main engine (1), and a main lubricating oil pipeline and a crosshead lubricating oil pipeline are installed on the upper and lower parts of the left side of the oil return pipe (2) respectively; A lubricating oil tank (3) is arranged at the right end of the oil return pipe (2); an online monitoring module (4) is installed on the left side of the upper surface of the oil return pipe (2); a polymer filter (5) is installed in the middle of the oil return pipe (2); and a circulation pump (6) is installed on the right side of the oil return pipe (2); A lubricating oil purifier (7) is arranged on the right side of the lubricating oil tank (3), the lubricating oil purifier (7) is connected to the surface of the lubricating oil tank (3) through a pipeline, and an oil inlet pipe (8) is installed at the bottom of the lubricating oil tank (3); A first fine filter (9) is arranged on the surface of the oil inlet pipe (8); a discharge pump (10) is arranged on the left side of the first fine filter (9); a magnetic filter (11) is arranged on the left side of the discharge pump (10); a first coarse filter (12) is arranged on the left side of the magnetic filter (11); the discharge pump (10), the magnetic filter (11) and the first coarse filter (12) are all installed on the surface of the oil inlet pipe (8); A second coarse filter (13) is arranged on the right side of the surface of the oil delivery pipe (101), a booster pump (14) is installed in the middle of the surface of the oil delivery pipe (101), a second fine filter (15) is installed on the left side of the surface of the oil delivery pipe (101), and a fuel tank (16) is installed at the left end of the oil delivery pipe (101).

2. The independent pre-oiling system for a low-speed diesel engine according to claim 1 is characterized in that: A liquid level observation tube (17) is installed on the surface of the oil inlet pipe (8), and liquid level scale lines are engraved on the surface of the liquid level observation tube (17).

3. The independent pre-oiling system for a low-speed diesel engine according to claim 1 is characterized in that: A pressure sensor (18) is installed on the surface of the oil return pipe (2), and the sensing end of the pressure sensor (18) extends into the inner cavity of the oil return pipe (2).

4. The independent pre-oiling system for a low-speed diesel engine according to claim 1 is characterized in that: A centrifugal pump (19) is installed on the pipeline surface between the lubricating oil purifier (7) and the lubricating oil tank (3).

5. The independent pre-oiling system for a low-speed diesel engine according to claim 1 is characterized in that: The upper surface of the lubricating oil tank (3) is provided with a filling pipe (20), and the lower part of the lubricating oil tank (3) is provided with an oil drain pipe (21).

6. The independent pre-oiling system for a low-speed diesel engine according to claim 1 is characterized in that: A liquid level observation plate (22) is installed on the right side of the lubricating oil tank (3). The liquid level observation plate (22) is transparent and has scale lines engraved on its surface.

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