JP2006138232A - Cylinder oil preparing and feeding device for internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cylinder oil preparing and feeding device for an internal combustion engine supplying cylinder oil or the like for TBN differing according to demand in a ship. <P>SOLUTION: Oil to be a base of the cylinder oil in a base oil tank 11 and a regulator in a regulator tank 12 are supplied to a mixing tank 14 by a regulator pump 13 and different cylinder oil is prepared in the ship by mixing the same. Consequently, the cylinder oil for different fuel oils 2, 3 and cylinder oil necessary for running-in can be easily prepared to prevent arrangement and pipe layout in an engine compartment from getting complicated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a cylinder oil blending and supplying device for an internal combustion engine, and is capable of blending and supplying two types of cylinder oil in a ship to a low-speed two-stroke internal combustion engine, in particular, high sulfur fuel oil and low sulfur fuel oil. The two types of cylinder oil required when using the above can be prepared on board from one type of base oil.

  Conventionally, in a marine low-speed two-stroke internal combustion engine, cylinder oil is supplied between a cylinder liner and a piston ring separately from normal lubricating oil.

  This cylinder oil is supplied to neutralize the lubrication between the cylinder liner and the piston ring and the combustion products produced in the cylinder, and the properties of the combustion products and the alignment of the cylinder liner and the piston ring. For promotion, cylinder oils having different TBNs (total base numbers) are being supplied.

  For this reason, for example, two types of cylinders are used: high-sulfur fuel oil used when navigating off the coast, such as the high seas, and ultra-low sulfur fuel oil used in designated areas as a regulatory response to SOx to prevent air pollution. For this reason, the main engine 1 is provided with a fuel oil tank 2 and a low-sulfur oil tank 3 for storing two types of fuel oil to be used, for example, as shown in FIG. The fuel is boosted and supplied to the main engine 1 by the fuel booster pump 4.

  A cylinder oil supply device for supplying two types of cylinder oil according to the type of fuel oil to the main engine 1 includes cylinder oil tanks 5 and 6 that store two cylinder oils having different TBNs. These can be switched and supplied to the cylinder by the lubricator 7.

As such TBN of cylinder oil, for example, cylinder oil of TBN40 is used for high sulfur fuel oil, and cylinder oil of TBN70 is used for low sulfur fuel oil, respectively, and marine diesel lubrication for adjusting TBN is used. About an oil additive, it is disclosed by patent documents 1-5.
Japanese Patent Publication No. 2000-514473 Publication 2000-514474 Publication 2000-514475 Publication No. 2000-511577 Japanese Patent Publication No. 2000-511953

  Until now, high-sulfur fuel oil has mainly been used, low sulfur oils such as marine diesel oil have been used for a short period of time, and the required amount of TBN cylinder oil corresponding to low sulfur oil is small. There was no need to supply.

 In addition, when it is necessary to supply different cylinder oil of TBN at the time of trial operation at the time of unloading, it is only necessary to prepare a drum can or the like, and provisional piping is provided in the ship.

  However, if the usage time of the ultra-low sulfur fuel oil becomes longer, for example, due to stricter regulations against air pollution, the cylinder oil to be used becomes two types with different TBN, and two cylinder oil tanks with different TBN are prepared as storage tanks in the ship. In addition to the necessity, there is a problem that the arrangement and piping in the engine room are complicated.

  In addition, when a new ship is set up or after the cylinder liner is replaced, the cylinder liner and piston ring surfaces need to be brought into contact with each other. There is also a problem that a supply device such as a cylinder oil tank of TBN which is different even if a small amount is required.

  The present invention has been made in view of the problems of the prior art, and intends to provide a cylinder oil blending and supplying device for an internal combustion engine capable of supplying different cylinder oils of TBN or the like as required on the ship. It is.

  In order to solve the above-described problems of the prior art, a cylinder oil blending and supplying device for an internal combustion engine according to claim 1 of the present invention is an internal combustion engine to which at least two types of cylinder oil are supplied, and the base of the cylinder oil A base oil tank that stores oil to be used, a regulator tank that stores a regulator that is added to the base oil to adjust different cylinder oil, and a base oil and a regulator from the base oil tank and the regulator tank, And a regulator pump that supplies the mixing tank with the regulator in the regulator tank.

  According to the cylinder oil blending and supplying apparatus of the internal combustion engine, the difference is obtained by supplying the oil that becomes the base of the cylinder oil of the base oil tank and the adjusting agent of the adjusting agent tank to the mixing tank by the adjusting agent pump and mixing them. Cylinder oil can be prepared on board, cylinder oil necessary for different fuel oils can be easily supplied, and the arrangement and piping in the engine room can be prevented from becoming complicated.

  The one type of cylinder oil may be used for high sulfur fuel oil, and the other type of cylinder oil may be configured for (ultra) low sulfur fuel oil, or the other type of cylinder oil may be used as a cylinder liner and a piston ring. Control means for detecting the switching between the two types of fuel oil, and controlling the supply amount of the adjusting agent by controlling the adjusting agent pump based on the switching signal. Further, the control means is configured to be controllable so as to gradually change the supply amount of the regulator based on the switching signal of the fuel oil.

  According to the cylinder oil blending and supplying device for an internal combustion engine according to claim 1 of the present invention, the oil that becomes the base of the cylinder oil of the base oil tank and the adjusting agent of the adjusting agent tank are supplied to the mixing tank by the adjusting agent pump, Since these are mixed, different cylinder oils can be blended in the ship, and the cylinder oil required for mating can be easily supplied for different fuel oils. Can be prevented from becoming complicated.

  In the invention described in claim 2, two types of cylinder oil for high sulfur fuel oil and (ultra) low sulfur fuel oil can be supplied. In the invention described in claim 3, the cylinder liner and piston ring In the invention according to claim 4, the regulator pump is controlled by the control means based on the switching signal detected by the detecting means for detecting the switching between the two types of fuel oil. By controlling the supply amount of the adjusting agent, it becomes possible to automatically adjust and supply the property of the cylinder oil. Further, in the invention according to claim 5, the control means outputs the fuel oil switching signal. Based on this, the supply amount of the adjusting agent can be gradually changed, and the cylinder oil corresponding to the change of the fuel oil can be further supplied.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic configuration diagram according to an embodiment of a cylinder oil blending and supplying apparatus for an internal combustion engine of the present invention.

  In the main engine 1 in which the cylinder oil blending and supplying device 10 of the internal combustion engine is installed, for example, as shown in FIG. 1, a fuel oil tank 2 and a low sulfur oil tank 3 for storing two types of fuel oil to be used are provided. For example, when navigating a sea area away from the coast such as the high seas, high-sulfur fuel oil travels from the fuel oil tank 2 to the SOx regulatory area for air pollution prevention. In this case, the ultra-low sulfur fuel oil is switched and supplied from the low sulfur oil tank 3 and supplied to the main engine 1 by the fuel booster pump 4.

  In the cylinder oil blending and supplying apparatus 10 for an internal combustion engine for supplying two types of cylinder oil to the main engine 1 in accordance with the type of fuel oil, a cylinder oil tank for base oil that serves as a base for the two types of cylinder oil. 11 is provided, for example, to store cylinder oil (TBN40) supplied corresponding to the high-sulfur fuel oil that is required in a large amount.

  Note that so-called base oil before the TBN adjustment may be stored in the cylinder oil tank 11.

  The cylinder oil blending and supplying apparatus 10 of the internal combustion engine is provided with a TBN adjusting agent tank 12 for storing an adjusting agent for adjusting the TBN of the cylinder oil, and the TBN adjustment is performed on the mixing tank 14 via the supply pump 13. The agent can be supplied. For example, the supply amount of the TBN adjusting agent can be adjusted by controlling the rotation speed of the supply pump 13.

  The mixing tank 14 for preparing the cylinder oil from the cylinder oil tank 11 and the TBN adjusting agent from the TBN adjusting agent tank 12 is provided with a mixer (not shown) to promote mixing.

The cylinder oil supplied from the mixing tank 14 to the lubricator 15 and whose TBN is adjusted in the mixing tank 14 is supplied into the cylinder of the main engine 1 via the lubricator 15. The cylinder oil blending and supplying apparatus 10 is provided with a control device 16 as a control means so as to automatically adjust the TBN of the cylinder oil to be supplied. When the fuel supplied to the main engine 1 is switched, the fuel switching time until the fuel injected into the main engine 1 is actually switched can be set in consideration of the amount of fuel held in the piping system. It is.

  Further, the control device 16 is input to use a fuel valve switching control signal of a control system of the main engine 1 (not shown) as a switching signal as a detecting means for detecting switching of the fuel switching valve 8, and based on this switching signal. Thus, the supply amount is controlled by controlling the rotation speed of the supply pump 13 for the TBN adjusting agent.

  Thereby, while the fuel switching valve 8 is switched and the fuel is gradually switched, the control device 16 controls the rotational speed of the supply pump 13 to control the supply amount of the TBN regulator to be gradually changed. The TBN of the cylinder oil supplied to the engine can be gradually changed and supplied, and the optimum cylinder oil can be adjusted according to the sulfur content of the fuel oil, compared to the conventional case of switching and supplying two types of cylinder oil. Can be supplied.

  In the cylinder oil blending and supplying apparatus 10 of the internal combustion engine configured as described above, for example, as high sulfur fuel oil is supplied to the main engine 1 from the fuel oil tank 2 via the fuel switching valve 8 by the fuel booster pump 4, as cylinder oil. The cylinder oil of TBN 40 stored in the cylinder oil tank 11 is supplied as it is through the mixing tank 14 and is injected into the cylinder by the lubricator 15.

  On the other hand, when the fuel supplied to the main engine 1 is switched to the low sulfur fuel oil, the fuel switching valve 8 is switched, and this switching signal is input to the control device 16.

  Then, the rotational speed of the supply pump 13 is controlled according to the fuel switching time set in advance from the control device 16 and the TBN to be adjusted, and the amount of the regulator supplied from the TBN regulator tank 12 to the mixing tank 14 is gradually increased. The TBN cylinder oil is adjusted according to the change in the sulfur content of the fuel, and is injected into the cylinder via the lubricator 15.

  In addition, when it is necessary to align the surfaces of the cylinder liner and piston ring when the ship is on board or after replacement of the cylinder liner, it is necessary to supply and lubricate cylinder oil with a high TBN in order to promote surface corrosion. In this case, the supply amount of the adjusting agent supplied from the TBN adjusting agent tank 12 is supplied by selecting a special operation mode of the control device 16 so that the necessary cylinder oil of TBN is adjusted in the mixing tank 14. This can be done.

  Accordingly, only one type of TBN cylinder oil or base oil of cylinder oil before TBN adjustment is stored in the cylinder oil tank 11 and another TBN adjustment agent is stored in the TBN adjustment agent tank 12 to obtain two necessary types of Furthermore, cylinder oils with different types of TBN can be adjusted and supplied.

  This makes it possible to adjust the cylinder oil required for the main engine flexibly by preparing only one type of cylinder oil even if local regulations on the fuel oil to be used occur. And complicated piping.

  In addition, the type of oil that needs to be mounted on the ship can be reduced, and the cylinder oil necessary for short-term alignment after replacement of the cylinder liner can also be prepared.

  Further, the cylinder oil can be automatically adjusted and supplied without performing the cylinder oil switching operation in accordance with the fuel oil switching, and the burden on the crew can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram concerning one Embodiment of the cylinder oil compounding supply apparatus of the internal combustion engine of this invention. It is a schematic block diagram of the cylinder oil supply apparatus of the conventional internal combustion engine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main engine 2 Fuel oil tank 3 Low-sulfur oil tank 4 Fuel booster pump 8 Fuel switching valve 10 Cylinder oil preparation supply apparatus 11 of an internal combustion engine Cylinder oil tank (base oil tank)
12 TBN regulator tank 13 Supply pump (regulator pump)
14 Mixing tank 15 Lubricator 16 Control device (control means)

Claims (5)

An internal combustion engine supplied with at least two types of cylinder oil,
A base oil tank that stores oil serving as a base of the cylinder oil;
A regulator tank that stores a regulator that is added to the base oil to adjust the different cylinder oil;
A mixing tank that mixes the base oil and regulator from these base oil tank and regulator tank;
A cylinder oil blending and supplying device for an internal combustion engine, comprising: a regulator pump that supplies the mixing tank with the regulator in the regulator tank.   2. The cylinder oil blending and supplying device for an internal combustion engine according to claim 1, wherein the one type of cylinder oil is used for high sulfur fuel oil and the other type of cylinder oil is used for low sulfur fuel oil.   3. The cylinder oil blending and supplying device for an internal combustion engine according to claim 1, wherein the other type of cylinder oil is configured as a cylinder oil for a cylinder liner and a piston ring.   2. A detecting means for detecting switching between the two types of fuel oils, and a control means for controlling the supply amount of the adjusting agent by controlling the adjusting agent pump based on the switching signal. A cylinder oil blending and supplying device for an internal combustion engine according to any one of? 5. The internal combustion engine according to claim 1, wherein the control unit is configured to be able to control the supply amount of the regulator to gradually change based on a switching signal of the fuel oil. Cylinder oil blending supply unit.

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