CN103670580B - A kind of lubricating oil system of high-power diesel engine - Google Patents

Abstract

The invention provides an engine oil system of a high-power diesel engine, which comprises an engine oil pump, an engine oil priority valve, an engine oil centrifugal oil filter, a supercharger, a supercharger filter and a pressure regulating valve. The oil pump is connected to the oil centrifugal oil filter, the supercharger is connected to the supercharger filter through the pressure regulating valve, the first oil outlet pipe of the oil pump on the oil pump is connected to the main oil of the oil priority valve on the oil priority valve. The second oil outlet pipe of the oil pump is connected to the auxiliary oil passage inlet of the oil priority valve on the oil priority valve, and the oil priority valve to the cooling piston oil passage interface on the oil priority valve is connected to the cooling piston oil passage of the diesel engine. Adopting the present invention can improve the self-filtering ability of the diesel engine oil, reduce the oil consumption of the system and make the pressure control of the entire oil system more reliable, and make the overall structure of the oil system more reasonable and compact, which is beneficial to ensure the power, economy, and efficiency of the diesel engine. reliability and durability.

Description

Oil system of a high-power diesel engine

technical field

The invention relates to the technical field of diesel engines, in particular to an engine oil system of a high-power diesel engine.

Background technique

The oil system of a diesel engine is an important part of a diesel engine. The oil system plays a role in lubricating, conducting heat, cleaning, sealing, and preventing rust on the parts of the diesel engine, so that the moving units of the diesel engine can be fully lubricated, thereby reducing friction loss and reducing parts. wear to ensure the power, economy, reliability and durability of the diesel engine.

The existing diesel engine oil system is mainly composed of oil pump and its inlet and outlet pipe assembly, oil centrifugal oil filter, supercharger filter, safety valve, gear lubrication piping system, left and right supercharger lubricating oil pipe assembly, pressure regulating valve And engine oil pipeline etc. composition. The specific layout of the system is as follows: (1) The oil pump is a fixed-capacity gear oil pump, which is driven by the crankshaft gear of the diesel engine and installed in the middle of the free end plate of the oil pan of the diesel engine as the power device of the entire oil system; (2) The engine oil There are two sets of centrifugal oil filters, which are installed side by side at the inspection hole of the crankcase on the right side of the diesel engine; (3) one safety valve, which is installed at the upper left of the free end plate of the oil pan; (4) the cylinder head of the diesel engine The lubricating pipeline of the rocker shaft and the fuel injection cam is designed outside the body; (5) The cooling piston oil passages of the diesel engine are arranged on the left and right sides of the body, and the oil entering the left cooling piston oil passage lubricates and cools the left row of pistons and cylinders The oil that enters the cooling piston oil channel on the right side lubricates and cools the right row of pistons and cylinder liners, and the lubricated oil enters the oil pan; (6) There are two supercharger filters, which are respectively arranged in two On the side, one end of each supercharger filter is connected to the end of the main oil passage of the diesel engine, and the other end is connected to the pressure regulating valve before entering the supercharger. Since there are only two centrifugal oil filters for engine oil, the self-filtering ability of the entire engine oil system is poor; the safety valve is a safety valve with an opening pressure value, which is not conducive to reducing the oil consumption of the diesel engine; The lubricating pipelines of the rocker shaft and the fuel injection cam are designed outside the engine body, which makes the structure of the diesel engine oil system scattered and not compact, and takes up external space; in addition, the filtration accuracy of the supercharger filter is 25 microns, which is not conducive to The lubrication of the supercharger reduces the service life of the supercharger.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-power diesel engine oil system to improve the self-cleaning ability of the engine oil system, reduce the oil consumption of the diesel engine, and control the system pressure of the engine oil system more efficiently. Reliable and more compact.

The technical problem to be solved in the present invention is achieved by the following technical solutions: an oil system for a high-power diesel engine, including an oil pump, an oil priority valve, an oil centrifugal filter, a supercharger, a supercharger filter and a regulator pressure valve, the oil pump communicates with the oil centrifugal oil filter through the third oil outlet pipe of the oil pump, the supercharger communicates with the supercharger filter through the pressure regulating valve, and the first oil outlet pipe of the oil pump on the oil pump communicates with the The inlet of the main oil passage of the oil priority valve on the oil priority valve is connected, and communicates with the main lubricating oil passage of the body through the interface of the oil priority valve to the main oil passage. The second oil outlet pipe of the oil pump on the oil pump is connected to the The inlet of the auxiliary oil passage of the oil priority valve is connected and communicated with the oil pan of the diesel engine through the oil priority valve to the oil pan interface of the diesel engine body; the oil priority valve on the oil priority valve is connected to the cooling piston oil passage interface with the diesel engine cooling piston oil passage connected.

Further, the main lubricating oil passage of the body is arranged in the middle upper part of the diesel engine body, and is provided with three branches, one branch enters the left camshaft lubricating oil passage through the left rib plate hole of the diesel engine body, and one branch passes through the right rib of the diesel engine body. The plate hole enters the lubricating oil passage of the right camshaft, and one branch of the branch enters the crankshaft lubricating oil passage through the vertical rib plate hole directly under the diesel engine block.

Further, the diesel engine cooling piston oil passages are arranged on the left and right sides of the diesel engine body, and are respectively connected to the left cooling piston lubricating oil passage and the right cooling piston lubricating oil passage.

Further, there are three centrifugal oil filters for engine oil, which are installed side by side at the observation hole of the crankcase on the right side of the diesel engine body near the front end, and are all connected to the third oil outlet pipe of the engine oil pump.

Further, there are two superchargers, which are divided into a first supercharger and a second supercharger, wherein the first supercharger is connected to the first supercharger filter through a first pressure regulating valve The second supercharger communicates with the filter of the second supercharger through the second pressure regulating valve.

Further, the first supercharger filter and the second supercharger filter are both supercharger filters with a filtration precision of 20 microns, and one end of each supercharger filter is connected to The ends of the main lubricating oil passage of the body are connected and communicated, and the other ends are respectively connected and communicated with the corresponding superchargers through corresponding pressure regulating valves.

Further, the oil system also includes an oil heat exchanger and an oil filter, and the first oil outlet pipe of the oil pump on the oil pump is sequentially connected with the oil heat exchanger, the oil filter, and the inlet of the main oil channel of the oil priority valve connected.

Compared with the prior art, the beneficial effects of the present invention are: the system oil consumption can be reduced when the diesel engine is at low speed by adopting the engine oil priority valve, and the pressure control of the whole engine oil system is more reliable; Filtration ability, so as to improve the working life of the supercharger and reduce the input cost of the supercharger; through reasonable pipeline layout design and layout of key components, the external pipeline of the oil system is minimized, making the overall structure of the oil system more reasonable , Compact, help to reduce the overall weight of the oil system. The engine oil system of the present invention enables the moving unit of the diesel engine to obtain sufficient lubrication, reduces the friction loss of the moving unit, improves the working life and reliability of the parts of the diesel engine, and thus can ensure the power, economy, reliability and durability of the diesel engine sex.

Description of drawings

Fig. 1 is a system configuration diagram of an engine oil system of a high-power diesel engine according to the present invention.

Fig. 2 is a structural sectional view of the engine oil priority valve in Fig. 1 .

Figure 3 is a layout diagram of the internal lubricating oil passage of the diesel engine oil system.

Marks in the figure: 1-oil pump, 2-oil pump inlet pipe, 3-first oil outlet pipe of oil pump, 4-oil heat exchanger, 5-oil filter, 6-second oil outlet pipe of oil pump, 7- The third oil outlet pipe of the oil pump, 8-oil priority valve, 9-oil centrifugal oil filter, 10-left supercharger lubricating oil pipe assembly, 11-first supercharger filter, 12-first pressure regulator Valve, 13-first supercharger, 14-second supercharger, 15-second supercharger filter, 16-right supercharger lubricating oil pipe assembly, 17-diesel engine body, 18-body main lubrication Oil passage, 19-gear lubricating pipe system, 20-inlet of main oil passage of engine oil priority valve, 21-inlet of auxiliary oil passage of engine oil priority valve, 22-left camshaft lubricating oil passage, 23-left cooling piston lubricating oil passage, 24 -Crankshaft lubricating oil passage, 25-right cooling piston lubricating oil passage, 26-right camshaft lubricating oil passage, 27-second pressure regulating valve, 28-oil priority valve to main oil passage interface, 29-oil priority valve to cooling Piston oil channel interface, 30-first piston, 31-oil priority valve to diesel engine body oil pan interface, 32-first spring, 33-second piston, 34-second spring.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The oil system of a high-power diesel engine as shown in Figure 1 is mainly composed of an oil pump 1, an oil heat exchanger 4, an oil filter 5, an oil priority valve 8, an oil centrifugal oil filter 9, a supercharger and The supercharger filter and the pressure regulating valve are composed of two superchargers, which are divided into a first supercharger 13 and a second supercharger 14 . Described supercharger filter is provided with two, is respectively the first supercharger filter 11 and the second supercharger filter 15, and one end of every supercharger filter is all connected with the main body of the body. The ends of the lubricating oil passage 18 are connected and communicated, and the other ends are respectively connected and communicated with corresponding superchargers through corresponding pressure regulating valves. The pressure regulating valve is also provided with two, which are divided into a first pressure regulating valve 12 and a second pressure regulating valve 27, and the first supercharger 13 passes through the first pressure regulating valve 12 and the first supercharger filter. The cleaner 11 is connected and communicated, and the second supercharger 14 is connected and communicated with the second supercharger filter 15 through the second pressure regulating valve 27 . The oil pump 1 is installed in the middle of the free end plate of the oil sump of the diesel engine, and it communicates with the oil centrifugal oil filter 9 through the third oil outlet pipe 7 of the oil pump. The oil centrifugal oil filter 9 is provided with three The platform is installed side by side on the right side of the diesel engine body 17 near the crankcase observation hole position of the front end, and is connected with the third oil outlet pipe 7 of the oil pump. The first oil outlet pipe 3 of the oil pump on the oil pump 1 is sequentially connected to the oil heat exchanger 4, the oil filter 5, and the main oil passage inlet 20 of the oil priority valve. The oil priority valve 8 is one set, which is installed on the upper right part of the front end of the diesel engine body 17. It communicates with the main lubricating oil channel 18 of the body through the oil priority valve to the main oil channel interface 28. The oil pump 1 on the oil pump 1 The second oil outlet pipe 6 is connected with the oil priority valve auxiliary oil channel inlet 21 on the oil priority valve 8, and communicates with the diesel engine oil pan through the oil priority valve to the oil pan interface 31 of the diesel engine body; the oil priority on the oil priority valve 8 The valve is connected to the cooling piston oil passage interface 29 with the diesel engine cooling piston oil passage.

The diesel engine cooling piston oil channel is arranged on the left and right sides in the diesel engine body 17, and is respectively connected with the left cooling piston lubricating oil channel 23 and the right cooling piston lubricating oil channel 25. Therefore, the machine oil entering the lubricating oil passage 23 of the left cooling piston can lubricate and cool the left column piston and the cylinder liner, and the machine oil entering the lubricating oil passage 25 of the right cooling piston can lubricate and cool the right column piston and cylinder liner. Into the oil pan; the oil pipelines for lubricating and cooling the cylinder liners and piston rings of the left and right rows are designed in the diesel engine body 17. This structural arrangement can reduce the external pipelines of the oil system and make the structure of the oil system more compact. Reasonable, compact, and also reduces the overall weight of the oil system.

As shown in Fig. 1 and Fig. 3, the main lubricating oil passage 18 of the diesel engine body is arranged in the middle upper part of the diesel engine body 17. The main lubricating oil passage 18 of the body is provided with three branches, and one branch passes through the left rib plate hole of the diesel engine body 17. Enter the left camshaft lubricating oil channel 22 to lubricate the left camshaft bearing of the diesel engine, the left intake and exhaust cams and the fuel injection cam, and then enter the left column cylinder head to lubricate the rocker arm shaft and seat and then flow into the oil pan; The branch enters the right camshaft lubricating oil passage 26 through the right rib plate hole of the diesel engine body 17 to lubricate the right camshaft bearing, the right inlet and exhaust cams and the fuel injection cam, and then enters the right column cylinder head to lubricate the rocker shaft and seat Then flow into the oil pan; there is also a branch that enters the crankshaft lubricating oil passage 24 through the vertical rib plate hole just below the diesel engine body 17 to lubricate the crankshaft bearing, and then also flows into the oil pan. Among them, the pipelines of the rocker arm shaft and seat of the cylinder head of the left column are designed in the diesel engine body 17, and the pipelines of the rocker arm shaft and seat of the cylinder head of the right column are also designed inside the diesel engine body 17. This arrangement can reduce the oil system. The external pipeline makes the structure of the oil system more reasonable and compact, which is beneficial to reduce the overall weight of the oil system.

The working process of the oil system of a high-power diesel engine with the above-mentioned structure is as follows. The lubricating oil from the diesel engine body 17 enters the oil inlet pipe 2 of the oil pump through the oil suction port at the bottom of the oil pump 1, and is output in three ways after being pressurized by the oil pump 1. , one of which is output from the first oil outlet pipe 3 of the oil pump to the oil heat exchanger 4, and then flows through the oil filter 5 and output to the oil priority valve 8, and the other one is directly output from the second oil outlet pipe 6 of the oil pump to the oil priority valve 8. There is also a road that is output from the third oil outlet pipe 7 of the oil pump to three centrifugal oil filters 9 installed side by side, and finally flows back to the diesel engine body 17 from the centrifugal oil filters 9 . The structure of the engine oil priority valve 8 is shown in FIG. 2 , which mainly includes a first piston 30 and a first spring 32 connected thereto, a second piston 33 and a second spring 34 connected thereto. Among them, the first piston 30 and the second piston 33 can move to the right under the pressure of the lubricating oil entering the oil priority valve 8, and make the corresponding first spring 32 and second spring 34 produce elastic deformation. At the same time, The recovery of the first spring 32 and the second spring 34 due to elastic deformation will also drive the first piston 30 and the second piston 33 to move leftward. Therefore, the actual direction of movement of the first piston 30 and the second piston 33 depends on the actual pressure of lubricating oil entering the main oil passage inlet 20 of the oil priority valve and the auxiliary oil passage inlet 21 of the oil priority valve. Depending on the actual pressure, the engine oil priority valve 8 can have three working modes corresponding to different pressure value ranges. The passage of the oil passage 18 is conducted; second, the passages from the engine oil priority valve 8 to the main lubricating oil passage 18 of the body and the passage to the cooling piston oil passage are simultaneously conducted; third, the oil priority valve 8 is connected to the main lubricating oil passage 18 of the body , to the cooling piston oil passage and the passage to the diesel engine body 17 oil sump simultaneously. The engine oil priority valve 8 adopting this structure and working mode can reduce the consumption of engine oil when the diesel engine is running at low speed, which is beneficial to save the cost of engine oil. Part of the oil output from the outlet of the oil priority valve 8 enters the gear lubricating piping system 19 to meet the lubrication needs of the gears, and most of the other enters the main lubricating oil passage 18 of the machine body, and then passes through the lubricating oil pipe assembly of the left supercharger 10, finally output to the first supercharger 13, and at the same time pass through the lubricating oil pipe assembly 16 of the right supercharger, and finally output to the second supercharger 14.

The oil pump 1 among the present invention adopts a fixed-capacity gear oil pump, which is driven by the crankshaft gear of the diesel engine as the power unit of the whole oil system; three sets of oil centrifugal oil filters 9 are arranged therein, and the oil centrifugal oil filter 9 The flow rate is 35 liters per minute to improve the self-filtering ability of diesel engine oil and make the lubricating oil quality of diesel engine parts higher; among them, there are two supercharger filters, which are the first supercharger filter 11 and the second supercharger filter 15, and its filtration accuracy is 20 microns, to improve the filtration accuracy of the first supercharger 13 and the second supercharger 14 lubricating oil, and then improve the work of the supercharger Life, reduce the use cost of the supercharger.

Due to the adoption of the above-mentioned technical scheme, the present invention can reduce the system oil consumption when the diesel engine is at a low speed through the oil priority valve 8, and the pressure control of the entire oil system is more reliable. The lubrication reduces the friction loss of the moving unit, improves the working life and reliability of the diesel engine parts, and further improves the cycle of changing the diesel engine oil, thus ensuring the power, economy, reliability and durability of the diesel engine. The following parameters are used for evaluation, and the cost of saving engine oil is calculated as follows: set the oil price m to 34.5 yuan/kg, diesel engine power Ne to 3800kW, oil saving ge to 0.05g/kW.h, and annual working hours n to 350 days/kg year, the daily working time B is 21 hours/day, and the load rate V of the diesel engine is 75%, then the cost that can be saved by the diesel engine running for one year is:

B*V*Ne*ge*n*m/1000=21*75%*3800*0.05*350*34.5/1000=363,000 (yuan), where "*" means multiplication.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. It should be noted that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should include Within the protection scope of the present invention.

Claims (7)

1. A kind of engine oil system of high-power diesel engine, comprises engine oil pump (1), engine oil centrifugal oil filter (9), supercharger and supercharger filter and pressure regulating valve, and engine oil pump (1) passes machine The third oil outlet pipe (7) of the oil pump is connected to the oil centrifugal oil filter (9), and the supercharger is connected to the supercharger filter through a pressure regulating valve. It is characterized in that it also includes an oil priority valve (8) , the first oil outlet pipe (3) of the oil pump (1) is connected to the main oil channel inlet (20) of the oil priority valve (8), and passes through the oil priority valve to the main oil channel interface ( 28) It communicates with the main lubricating oil passage (18) of the machine body, and the second oil outlet pipe (6) of the oil pump on the oil pump (1) is connected with the inlet (21) of the auxiliary oil passage of the oil priority valve on the oil priority valve (8) Connected, and communicated with the diesel engine oil pan through the oil priority valve to the diesel engine body oil pan interface (31); the oil priority valve on the oil priority valve (8) to the cooling piston oil channel interface (29) is connected to the diesel engine cooling piston oil channel Connected. 2. The engine oil system of a high-power diesel engine according to claim 1, characterized in that: the main lubricating oil passage (18) of the body is arranged in the middle upper part of the body (17) of the diesel engine, and is provided with three branches , one branch enters the left camshaft lubricating oil passage (22) through the left rib plate hole of the diesel engine body (17), one branch enters the right camshaft lubricating oil passage (26) through the right rib plate hole of the diesel engine body (17), and one branch passes through The vertical rib plate hole directly below the diesel engine body (17) enters the crankshaft lubricating oil passage (24). 3. The machine oil system of a kind of high-power diesel engine according to claim 1, it is characterized in that: described diesel engine cooling piston oil channel is arranged on the left and right sides in the diesel engine body (17), and respectively with left cooling piston lubricating oil Road (23) and right cooling piston lubricating oil passage (25) are connected and communicated. 4. The engine oil system of a high-power diesel engine according to any one of claims 1-3, characterized in that: said engine oil centrifugal oil filter (9) is provided with three sets, installed side by side on the diesel engine body (17 ) on the right side of the front end of the crankcase observation hole, and they are all connected to the third oil outlet pipe (7) of the oil pump. 5. The engine oil system of a high-power diesel engine according to any one of claims 1-3, characterized in that: two superchargers are arranged, which are divided into a first supercharger (13) and a second supercharger (13). supercharger (14), wherein the first supercharger (13) is connected to the first supercharger filter (11) through the first pressure regulating valve (12), and the second supercharger (14) is connected to the first supercharger filter (11) through The second pressure regulating valve (27) is connected and communicated with the second supercharger filter (15). 6. The engine oil system of a high-power diesel engine according to claim 5, characterized in that: the first supercharger filter (11) and the second supercharger filter (15) are both The supercharger filter with a filtration precision of 20 microns, one end of each supercharger filter is connected to the end of the main lubricating oil passage (18) of the body, and the other end is connected to the corresponding pressure regulating valve through the corresponding pressure regulating valve. The supercharger is connected. 7. The engine oil system of a high-power diesel engine according to any one of claims 1-3, characterized in that: the engine oil system also includes an oil heat exchanger (4) and an oil filter (5), and The first oil outlet pipe (3) of the oil pump on the oil pump (1) is sequentially connected to the oil heat exchanger (4), the oil filter (5), and the main oil channel inlet (20) of the oil priority valve.