Lubricating oil supplementing device of diesel engine

Abstract

According to the lubricating oil supplementing device for the diesel engine, the diesel engine is communicated with an engine belt lubricating oil bottom shell through a diesel lubricating oil system, and needed lubricating oil is provided for the diesel engine through the diesel lubricating oil system; a lubricating oil supplementing tank is arranged outside the machine belt lubricating oil bottom shell, the upper end and the lower end of the lubricating oil supplementing tank communicate with the machine belt lubricating oil bottom shell through a lubricating oil supplementing loop, and lubricating oil in the lubricating oil supplementing tank is supplemented into the machine belt lubricating oil bottom shell through the lubricating oil supplementing loop in combination with the lubricating oil liquid level in the machine belt lubricating oil bottom shell. The lubricating oil supplementing loop is designed to communicate the machine belt lubricating oil bottom shell with the lubricating oil supplementing tank located outside the machine belt lubricating oil bottom shell, so that the lubricating oil liquid level control under the non-stop state is realized under the normal operation state of the diesel engine, and the adverse effect on the normal operation of the diesel engine or a ship after the liquid level alarm of the diesel engine is solved; a crankcase cover plate does not need to be opened for lubricating oil supplementation, the defect of lubricating oil supplementation during shutdown is overcome, normal operation of the diesel engine is guaranteed, and the power-to-weight ratio index of the diesel engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engine lubrication, and in particular relates to a diesel engine lubricating oil replenishing device. Background Art

[0002] One of the prerequisites for the normal operation of a diesel engine is good lubrication, otherwise alarms and shutdowns may occur. The function of a diesel engine's lubricating oil system is to lubricate the surface of friction pair components, reduce wear on the friction pair surface, reduce motion resistance, improve work efficiency, and also have a cooling effect. Most diesel engines are equipped with a wet oil pan, which is equipped with high and low level sensors. When the level exceeds the limit, an alarm signal will be sent to the operating table or control room. During the use of a diesel engine, a certain amount of lubricating oil will be consumed due to the retention of some lubricating oil on the cylinder liner arm surface. The lubricating oil consumption rate is also one of the design indicators of a diesel engine. For a diesel engine with a wet oil pan, the lubricating oil level will gradually drop during use. After the minimum level alarm is reached, the engine must be shut down for lubricating oil replenishment. The current design of diesel engine lubricating oil systems has the following shortcomings: ① The lubricating oil in the diesel engine's lubricating oil sump will gradually decrease as the diesel engine runs. When the lubricating oil level reaches the minimum alarm, the diesel engine shuts down, which has a certain impact on the normal operation of the diesel engine or the normal operation of the ship; ② When the engine is shut down to replenish the lubricating oil, the crankcase cover of the diesel engine needs to be opened, which will bring a certain amount of disassembly and assembly workload; therefore, it is necessary to make improvements to the above problems. Utility Model Content

[0003] The technical problem solved by the utility model is as follows: a diesel engine lubricating oil replenishing device is provided, which connects the engine belt lubricating oil pan and the lubricating oil replenishing tank located outside the engine belt lubricating oil pan by designing a lubricating oil replenishing circuit, realizes lubricating oil level control without stopping the diesel engine in normal operation, solves the adverse effect of diesel engine liquid level alarm on the normal operation of the diesel engine or the ship, does not need to open the crankcase cover to replenish lubricating oil, eliminates the disadvantage of stopping the engine to replenish lubricating oil, ensures the normal operation of the diesel engine, and improves the power-to-weight ratio index of the diesel engine.

[0004] The technical solution adopted by the utility model is as follows: a diesel engine lubricating oil replenishing device comprises a diesel lubricating oil system, wherein the diesel lubricating oil system connects the diesel engine and the belt lubricating oil sump, and provides the required lubricating oil to the diesel engine through the diesel lubricating oil system; an lubricating oil replenishing tank is arranged outside the belt lubricating oil sump, and the upper and lower ends of the lubricating oil replenishing tank are connected with the belt lubricating oil sump through a lubricating oil replenishing circuit, and the lubricating oil in the lubricating oil replenishing tank is replenished into the belt lubricating oil sump by the lubricating oil replenishing circuit in combination with the lubricating oil liquid level in the belt lubricating oil sump.

[0005] Wherein, the lubricating oil replenishment circuit includes a coaxial double gear pump, the oil suction end of the coaxial double gear pump is connected with the machine belt lubricating oil pan through an oil suction pipe, and the oil outlet one of the coaxial double gear pump is connected with the upper end of the lubricating oil replenishment tank through an oil outlet pipe one, the oil suction port of the coaxial double gear pump is connected with the lower end of the lubricating oil replenishment tank through an oil suction pipe, and the oil outlet two of the coaxial double gear pump is connected with the machine belt lubricating oil pan through an oil outlet pipe two, and the oil outlet pipe two is connected with the oil suction pipe through a one-way branch.

[0006] Furthermore, the one-way branch comprises a branch pipe connecting the oil extraction pipe and the second oil outlet pipe, and a one-way valve is provided on the branch pipe.

[0007] Furthermore, the lower end of the oil extraction pipe is connected to filter 2 which is arranged in the belt oil pan and located below the high liquid level line of the oil. The oil extraction pipe is provided with a one-way valve 2 which prevents the oil in the pipe from flowing back into the belt oil pan, and the connection position between the branch pipe and the oil extraction pipe is located at the downstream section of the one-way valve 2.

[0008] Furthermore, a one-way valve three is provided on the oil suction pipe, and one end of the oil suction pipe extending into the lubricating oil replenishing tank is connected to a filter three located below the oil replenishing low liquid level line.

[0009] Furthermore, the belt lubricating oil pan is provided with an oil level dipstick for measuring the internal lubricating oil level.

[0010] Furthermore, the diesel lubricating oil system includes a lubricating oil supply pipeline and an oil return pipe. The engine belt lubricating oil sump is connected to the lubricating oil inlet of the diesel engine through the lubricating oil supply pipeline provided with a engine belt lubricating oil pump, and the lubricating oil outlet on the diesel engine is connected to the engine belt lubricating oil sump through the oil return pipe. The lower end of the lubricating oil supply pipeline is connected to a filter arranged in the engine belt lubricating oil sump and below the lubricating oil low liquid level line.

[0011] The advantages of this utility model compared with the prior art:

[0012] 1. This technical solution connects the engine oil pan and the oil filling tank located outside the engine oil pan by designing an oil filling circuit, so as to realize the oil level control without stopping the diesel engine in normal operation, solve the adverse effect of the diesel engine liquid level alarm on the normal operation of the diesel engine or the ship, and eliminate the disadvantage of stopping the engine to replenish the oil without opening the crankcase cover.

[0013] 2. This technical solution adopts the principle of coaxial double gear pump and pipeline integrated design. Through the suction work of the coaxial double gear pump, the liquid level of the diesel engine oil pan is maintained at a certain height, providing a stable lubricating oil supply system for the diesel engine;

[0014] 3. This technical solution has a simple structure and novel design. The oil level in the oil pan of the engine is easy to control, which ensures the normal operation of the diesel engine and improves the power-to-weight ratio of the diesel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the system principle of the utility model. DETAILED DESCRIPTION

[0016] The following will be combined with the embodiment of the present utility model Figure 1 , 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 them. Based on the embodiments of 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.

[0017] It should be noted that, in this document, unless otherwise stated, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc., are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0018] In this document, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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. In the absence of further limitations. The elements defined by the sentence "comprising a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0019] Diesel engine oil replenishing device, such as Figure 1As shown, it includes a diesel lubricating oil system, which connects the diesel engine 3 and the engine oil pan 1, and provides the required lubricating oil to the diesel engine 3 through the diesel lubricating oil system; a lubricating oil replenishing tank 6 is arranged outside the engine oil pan 1, and the upper and lower ends of the lubricating oil replenishing tank 6 are connected to the engine oil pan 1 through a lubricating oil replenishing circuit, and the lubricating oil in the lubricating oil replenishing tank 6 is replenished into the engine oil pan 1 by the lubricating oil replenishing circuit in combination with the lubricating oil level in the engine oil pan 1; in the above structure, the engine oil pan 1 and the lubricating oil replenishing tank 6 located outside the engine oil pan 1 are connected by designing a lubricating oil replenishing circuit, and the lubricating oil level control is realized in the normal operation state of the diesel engine without stopping the engine, which solves the adverse effects of the diesel engine liquid level alarm on the normal operation of the diesel engine or the ship, and there is no need to open the crankcase cover to replenish the lubricating oil, and the disadvantages of stopping the engine to replenish the lubricating oil are eliminated;

[0020] The specific structure of the lubricating oil replenishing circuit is as follows: the lubricating oil replenishing circuit includes a coaxial double gear pump 8, wherein the driving shaft of the coaxial double gear pump 8 is connected to the camshaft of the diesel engine, so that the coaxial double gear pump 8 can be started and operated when the diesel engine is running, the pumping end of the coaxial double gear pump 8 is connected to the engine belt lubricating oil sump 1 through the pumping pipe 9, and the oil outlet of the coaxial double gear pump 8 is connected to the upper end of the lubricating oil replenishing tank 6 through the oil outlet pipe 10, and the coaxial double gear pump 8 is connected to the upper end of the lubricating oil replenishing tank 6 through the oil outlet pipe 10. The oil suction port is connected to the lower end of the lubricating oil replenishing tank 6 through the oil suction pipe 11, and the oil outlet 2 of the coaxial double gear pump 8 is connected to the engine oil pan 1 through the oil outlet pipe 2 12, and the oil outlet pipe 2 12 is connected to the oil extraction pipe 9 through the one-way branch 13; in the above structure, the coaxial double gear pump 8 and the pipeline integrated design principle are adopted, and the suction work of the coaxial double gear pump 8 is used to ensure that the liquid level of the diesel engine oil pan 1 is maintained at a certain height, providing a stable lubricating oil supply system for the diesel engine;

[0021] The specific structure of the one-way branch 13 is as follows: the one-way branch 13 includes a branch pipe connecting the oil extraction pipe 9 and the oil outlet pipe 2 12, and the branch pipe is provided with a one-way valve 15; specifically, the lower end of the oil extraction pipe 9 is connected to the filter 2 17 arranged in the engine belt lubricating oil sump 1 and located below the lubricating oil high liquid level line 16, and the oil extraction pipe 9 is provided with a one-way valve 2 18 to prevent the lubricating oil in the pipe from flowing back into the engine belt lubricating oil sump 1, and the connection position of the branch pipe and the oil extraction pipe 9 is located at the downstream section of the one-way valve 2 18; specifically, the oil suction pipe 11 is provided with a one-way valve 3 19, and the end of the oil suction pipe 11 extending into the lubricating oil replenishing tank 6 is connected to the filter 3 21 located below the replenishing oil low liquid level line 20.

[0022] In order to quickly and conveniently grasp the height of the lubricating oil level in the belt lubricating oil pan 1, an oil level dipstick 22 for measuring the internal lubricating oil level is provided on the belt lubricating oil pan 1.

[0023] The specific structure of the diesel lubricating oil system is as follows: the diesel lubricating oil system includes a lubricating oil supply pipeline 2 and a return oil pipe 14, the engine belt lubricating oil sump 1 is connected to the lubricating oil inlet of the diesel engine 3 through the lubricating oil supply pipeline 2 provided with a engine belt lubricating oil pump 7, and the lubricating oil outlet on the diesel engine 3 is connected to the engine belt lubricating oil sump 1 through the return oil pipe 14, and the lower end of the lubricating oil supply pipeline 2 is connected to a filter 5 arranged in the engine belt lubricating oil sump 1 and below the lubricating oil low liquid level line 4.

[0024] In this structure, the engine oil pan 1 is normally filled with lubricating oil to between the lubricating oil low level line 4 and the lubricating oil high level line 16; during the operation of the diesel engine, the coaxial double gear pump 8 draws oil from the engine oil pan 1 of the diesel engine through the oil extraction pipe 9, and supplies it to the lubricating oil replenishing tank 6 through the oil outlet pipe 1; at the same time, the coaxial double gear pump 8 draws oil from the lower end of the lubricating oil replenishing tank 6 through the oil suction pipe 11, and supplies it to the engine oil pan 1 of the diesel engine through the oil outlet pipe 2 12; the lubricating oil replenishing tank 6 is provided with a replenishing oil low level line 20 and a replenishing oil High liquid level line, when the lubricating oil in the lubricating oil replenishing tank 6 is lower than the replenishing oil low liquid level line 20 or higher than the replenishing oil high liquid level line, the liquid level alarm arranged on the lubricating oil replenishing tank 6 will start the alarm; in this structure, the coaxial double gear pump 8 is a purchased part, which is similar to two lubricating oil gear pumps, one oil extraction pump and one oil suction pump, except that the driving gears are made coaxial; the flow rate of the oil extraction pump in the coaxial double gear pump 8 is the same as the flow rate of the oil suction pump, and can be designed according to a flow rate of 1.2 to 1.5 times the lubricating oil consumption of the diesel engine at 110% load.

[0025] As the diesel engine runs, the lubricating oil in the engine belt lubricating oil pan 1 is consumed, and the liquid level will drop to the pipe mouth below the filter 2 17 (i.e., the dotted line below the filter 2 17). At this moment, the oil pump in the coaxial double gear pump 8 cannot pump up the lubricating oil, but the lubricating oil sucked by the oil suction pump in the coaxial double gear pump 8 will flow into the engine belt lubricating oil pan 1, so that the liquid level in the engine belt lubricating oil pan 1 will rise; considering that the oil pump of the coaxial double gear pump 8 may fail to pump out oil, in order to prevent the oil pump gear of the coaxial double gear pump 8 from abnormal wear, a one-way branch 13 is specially designed to distribute some lubricating oil from the lubricating oil outlet of the oil suction pump of the coaxial double gear pump 8 to the oil pump gear of the coaxial double gear pump 8 through a one-way valve 15; since the diesel engine consumes lubricating oil when it runs, the consumed lubricating oil capacity can be transferred to the lubricating oil replenishing tank 6 in this way, and lubricating oil can be replenished to the lubricating oil replenishing tank 6 according to the detection result of the liquid level detector on the lubricating oil replenishing tank 6.

[0026] The working mode of the suction pump can control the oil level of the diesel engine oil pan at a certain position, so that the diesel engine can always run. It is not necessary to artificially supplement the diesel engine oil pan 1 with lubricating oil.

[0027] The technical solution has a simple structure and a novel design. The oil level in the engine oil pan 1 is easily controlled, which ensures the normal operation of the diesel engine, reduces the volume of the engine oil pan 1, and improves the power-to-weight ratio index of the diesel engine.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A diesel engine lubricating oil replenishing device, characterized in that: The invention comprises a diesel lubricating oil system, wherein the diesel lubricating oil system connects a diesel engine (3) and a belt lubricating oil sump (1), and provides required lubricating oil to the diesel engine (3) through the diesel lubricating oil system; an oil replenishing tank (6) is arranged outside the belt lubricating oil sump (1), and the upper and lower ends of the oil replenishing tank (6) are connected to the belt lubricating oil sump (1) through an oil replenishing circuit, and the oil in the oil replenishing tank (6) is replenished into the belt lubricating oil sump (1) by the oil replenishing circuit in combination with the oil level in the belt lubricating oil sump (1).

2. The diesel engine lubricating oil replenishing device according to claim 1, characterized in that: The lubricating oil replenishment circuit comprises a coaxial double gear pump (8), the oil extraction end of the coaxial double gear pump (8) is connected to the machine belt lubricating oil pan (1) through an oil extraction pipe (9), and the oil outlet 1 of the coaxial double gear pump (8) is connected to the upper end of the lubricating oil replenishment tank (6) through an oil outlet pipe 1 (10), the oil suction port of the coaxial double gear pump (8) is connected to the lower end of the lubricating oil replenishment tank (6) through an oil suction pipe (11), and the oil outlet 2 of the coaxial double gear pump (8) is connected to the machine belt lubricating oil pan (1) through an oil outlet pipe 2 (12), and the oil outlet pipe 2 (12) is connected to the oil extraction pipe (9) through a one-way branch (13).

3. The diesel engine lubricating oil replenishing device according to claim 2, characterized in that: The one-way branch (13) comprises a branch pipe connecting the oil extraction pipe (9) and the second oil outlet pipe (12), and a one-way valve (15) is provided on the branch pipe.

4. The diesel engine lubricating oil replenishing device according to claim 3, characterized in that: The lower end of the oil extraction pipe (9) is connected to a second filter (17) which is arranged in the engine oil sump (1) and is located below the high oil level line (16). The oil extraction pipe (9) is provided with a second one-way valve (18) for preventing the oil in the pipe from flowing back into the engine oil sump (1), and the connection position between the branch pipe and the oil extraction pipe (9) is located at the downstream section of the second one-way valve (18).

5. The diesel engine lubricating oil replenishing device according to claim 4, characterized in that: The oil suction pipe (11) is provided with a one-way valve three (19), and one end of the oil suction pipe (11) extending into the lubricating oil replenishment tank (6) is connected to a filter three (21) located below the replenishment oil low liquid level line (20).

6. The diesel engine lubricating oil replenishing device according to claim 1, characterized in that: The belt lubricating oil pan (1) is provided with an oil level dipstick (22) for measuring the internal lubricating oil level.

7. The diesel engine lubricating oil replenishing device according to any one of claims 1 to 6, characterized in that: The diesel lubricating oil system comprises a lubricating oil supply pipeline (2) and an oil return pipe (14); the engine oil pan (1) is connected to the lubricating oil inlet of the diesel engine (3) via the lubricating oil supply pipeline (2) provided with an engine oil pump (7); and the lubricating oil outlet on the diesel engine (3) is connected to the engine oil pan (1) via the oil return pipe (14); the lower end of the lubricating oil supply pipeline (2) is connected to a filter (5) provided in the engine oil pan (1) and below the lubricating oil low level line (4).

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