JP6109485B2 - Cylinder lubrication device - Google Patents

Description

  The present invention relates to a cylinder lubrication device that forcibly lubricates an inner peripheral surface of a cylinder of an internal combustion engine, particularly a large diesel engine, preferably a marine diesel engine.

  As a cylinder lubricator (hereinafter referred to as “cylinder lubrication device”) that forcibly lubricates the inner peripheral surface of a cylinder of a marine diesel engine, for example, one disclosed in Patent Document 1 is known.

Japanese Utility Model Publication No. 58-50003

  However, in the cylinder lubrication device disclosed in Patent Document 1, the valve opening degree of the flow rate adjusting valve 18 is manually adjusted, and the flow rate of the hydraulic working fluid passing through the flow rate adjusting valve 18 is adjusted. That is, the speed of the plunger 11 is adjusted to adjust the oiling speed (oiling period: oiling time). That is, in the cylinder lubrication device disclosed in Patent Document 1, it is virtually impossible to manually adjust the valve opening degree of the flow rate adjusting valve 18 each time according to the rotational speed of the internal combustion engine. There was a problem that control (lubrication) was not possible during the lubrication period appropriate for the number.

  The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a cylinder lubrication device capable of automatically adjusting the lubrication speed (the lubrication period: the lubrication time) according to the rotational speed of the internal combustion engine. And

The present invention employs the following means in order to solve the above problems.
When the solenoid valve provided in the middle of the branch pipe is opened, the lubricating oil in the lubricating oil main pipe regulated by the relief valve unit is supplied to the cylinder lubricating apparatus according to the present invention via the branch pipe. Lubricating oil led to the cylinder and pushed up the piston and plunger provided in the lubricator, and filled in the cylinder that accommodates the plunger is lubricated, and a cylinder lubrication port provided in the cylinder of the internal combustion engine A cylinder lubrication device that is injected between the cylinder of the internal combustion engine and the piston of the internal combustion engine via the internal combustion engine, wherein the branch pipe, the solenoid valve, and the lubricator One relief valve unit is provided for each cylinder, and the relief valve unit lubricates the lubricating oil main pipe when the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine. When the pressure of the internal combustion engine is high and the pressure of the internal combustion engine is high, the pressure of the lubricating oil in the lubricating oil main pipe is linear or stepped so that the pressure of the lubricating oil in the lubricating oil main pipe becomes high, and And the relief valve unit includes a plurality of relief valves corresponding to the rotational speed of the internal combustion engine, and the relief valve excluding the relief valves corresponding to a high rotational speed of the internal combustion engine. A plurality of solenoid valves provided for each of the valves, and a stop valve that is provided for each of the solenoid valves and is fully closed when the corresponding solenoid valve is abnormal. When an abnormality occurs in the valve, the stop valve is fully closed so that the pressure of the lubricating oil in the lubricating oil main pipe is set to a pressure corresponding to the time when the rotational speed of the internal combustion engine is high. The pressure of the lubricating oil is The number is the pressure in accordance with the time high.

  According to the cylinder lubrication device of the present invention, when the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine, the pressure of the lubricating oil in the lubricating oil main pipe is low, and when the rotational speed of the internal combustion engine is high, A relief valve unit comprising a hydraulic circuit that automatically changes the pressure of the lubricating oil in the lubricating oil main pipe linearly or stepwise and automatically so that the pressure of the lubricating oil in the lubricating oil main pipe increases. Therefore, the oiling speed (oiling period: oiling time) can be automatically adjusted according to the rotational speed of the internal combustion engine.

  The internal combustion engine which concerns on this invention comprises the said cylinder oil supply apparatus.

  According to the internal combustion engine of the present invention, when the rotational speed of the internal combustion engine is low, lubrication is performed at a slow lubrication speed (long lubrication period: lubrication time), and when the rotational speed of the internal combustion engine is high, fast lubrication is performed. Lubrication is performed at a speed (short lubrication period: lubrication time), and appropriate lubrication according to the rotational speed of the internal combustion engine is performed.

In the cylinder lubricating method according to the present invention, when an electromagnetic valve provided in the middle of the branch pipe is opened, the lubricating oil in the lubricating oil main pipe regulated by the relief valve unit is passed through the branch pipe to the lubricator. Lubricating oil led to the cylinder and pushed up the piston and plunger provided in the lubricator, and filled in the cylinder that accommodates the plunger is lubricated, and a cylinder lubrication port provided in the cylinder of the internal combustion engine A cylinder lubrication method that is injected between the cylinder of the internal combustion engine and the piston of the internal combustion engine via an internal combustion engine, wherein the branch pipe, the electromagnetic valve, and the lubricator are one of the internal combustion engine One for each cylinder, and when the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine, the pressure of the lubricating oil in the lubricating oil main pipe is low, and the internal combustion engine When the number of rotations is high, the pressure of the lubricating oil in the lubricating oil main pipe is automatically changed linearly or stepwise so that the pressure of the lubricating oil in the lubricating oil main pipe becomes high, The relief valve unit includes a plurality of relief valves corresponding to the number of revolutions of the internal combustion engine and a plurality of electromagnetic valves provided for each of the relief valves excluding the relief valve corresponding to the high number of revolutions of the internal combustion engine. A valve and a plurality of stop valves that are fully closed when an abnormality occurs in the electromagnetic valve, and are provided corresponding to each of the electromagnetic valves, and when the abnormality occurs in the electromagnetic valve, the stop valve Is fully closed, so that the pressure of the lubricating oil in the lubricating oil main pipe is set to a pressure corresponding to the time when the rotational speed of the internal combustion engine is high.

  According to the cylinder lubrication method according to the present invention, according to the rotational speed of the internal combustion engine, when the rotational speed of the internal combustion engine is low, the pressure of the lubricating oil in the lubricating oil main pipe is low, and when the rotational speed of the internal combustion engine is high, Since the pressure of the lubricating oil in the lubricating oil main pipe is changed linearly or stepwise and automatically so that the pressure of the lubricating oil in the lubricating oil main pipe becomes high, the rotational speed of the internal combustion engine The oiling speed (oiling period: oiling time) can be automatically adjusted according to the condition.

  According to the cylinder lubrication device of the present invention, there is an effect that the lubrication speed (the lubrication period: the lubrication time) can be automatically adjusted according to the rotational speed of the internal combustion engine.

It is a schematic block diagram which shows one specific example of the cylinder lubricating apparatus which concerns on this invention. It is a figure which shows the structure of the outline of the relief valve unit which concerns on 1st Embodiment of this invention. It is a chart which shows the relationship between the pressure in the lubricating oil main pipe located upstream from the relief valve unit which concerns on 1st Embodiment of this invention, and the rotation speed of an internal combustion engine. It is a figure which shows the structure of the outline of the relief valve unit which concerns on 2nd Embodiment of this invention. It is a graph which shows the relationship between the pressure in the lubricating oil main pipe located upstream from the relief valve unit which concerns on 2nd Embodiment of this invention, and the rotation speed of an internal combustion engine.

[First Embodiment]
Hereinafter, a cylinder lubrication device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, a cylinder lubricating device 1 according to this embodiment includes a lubricating oil main pipe (lubricating oil circulation pipe) 2, a lubricating oil tank 3, a lubricating oil pump 4, a filter 5, and a relief valve unit 6. A branch pipe 7, an electromagnetic valve 8, an oil lubricator 9, an oil lubrication pipe 10, and a (first lubricating oil) oil supply pipe 11.

  The lubricating oil main pipe 2 has one end (upstream end) disposed inside the lubricating oil tank 3 and in the vicinity of the bottom surface of the lubricating oil tank 3, the other end (downstream end) disposed inside the lubricating oil tank 3, and The piping is arranged so as to open to the bottom surface of the lubricating oil tank 3, and in the middle of the lubricating oil main pipe 2, the lubricating oil pump 4, the filter 5, and the relief valve unit 6 are arranged from the upstream side toward the downstream side. It is connected.

  Inside the lubricating oil tank 3, there are lubricating oil supplied to the relief valve unit 6, lubricating oil supplied to the oiling device 9 through the electromagnetic valve 8, a lubricating oil supply pipe 11, an oiling device 9 and an oiling pipe 10. The lubricating oil injected between the cylinder 21 and the piston 22 is stored. A lubricating oil supply pipe 12 is connected to the lubricating oil tank 3 so that the lubricating oil can be supplemented from a lubricating oil tank (not shown) different from the lubricating oil tank 3 when necessary. ing.

  The lubricating oil pump 4 is rotationally driven by a motor (for example, an electric motor) 4a, so that the lubricating oil guided (sucked) from the lubricating oil tank 3 through the lubricating oil main pipe 2 is supplied at a certain pressure (for example, , 6.0 MPa), and pumps out the lubricating oil pressurized to a constant pressure to the lubricating oil main pipe 2 connected downstream (connected to the discharge port).

The filter 5 removes impurities (for example, dust) contained in the lubricating oil introduced from the lubricating oil pump 4 through the lubricating oil main pipe 2 from the lubricating oil. It is led downstream through the lubricating oil main pipe 2.
One end (upstream end) of the branch pipe 7 is connected to the middle of the lubricating oil main pipe 2 positioned between the filter 5 and the relief valve unit 6, and the other end (downstream end) is connected to the cylinder 31 of the lubricator 9. An electromagnetic valve 8 is connected to the middle of the branch pipe 7.

  When the electromagnetic valve 8 is opened, the lubricating oil that has been pressure-regulated by the relief valve unit 6 (adjusted in pressure) is guided to the cylinder 31 of the lubricator 9 via the branch pipe 7, and the piston 32 and plunger The lubricating oil filled in the cylinder 34 that pushes up the 33 and accommodates the plunger 33 is injected between the cylinder 21 and the piston 22 through the oil supply pipe 10 and the cylinder oil supply port 35 provided in the cylinder 21. The

  On the other hand, when the solenoid valve 8 is closed, the piston 32 and the plunger 33 are pushed back by the return spring 36 and the lubricating oil filled in the cylinder 31 and the branch pipe 7 positioned between the solenoid valve 8 and the cylinder 31 are filled. The lubricating oil filled therein is returned from the blow side (not shown) of the solenoid valve 8 to the lubricating oil tank 3 through the lubricating oil return pipe 45. At the same time, in the cylinder 34, from the oil reservoir 37 of the lubricator 9, the (second lubricating oil) oil supply pipe 38, the check valve 39, and a part of the oil supply pipe 10 located upstream of the oil supply pipe 10. Then, the lubricating oil that has filled the oil reservoir 37 of the lubricator 9 is sucked (supplied), and the cylinder 34 is filled with the lubricating oil. Further, the lubricating oil is sucked into the oil reservoir 37 by the amount of lubricating oil supplied into the cylinder 34 through the oil supply pipe 11 and the oil supply port 40 provided in the oil supply 9 (replenishment). )

  Here, one branch pipe 7, one electromagnetic valve 8, and one lubricator 9 are provided for each cylinder 21. Further, one oil supply pipe 10, one plunger 33, one cylinder 34, one oil supply pipe 38, and one check valve 39 are provided for each cylinder oil supply port 35, that is, one cylinder oil supply port for one cylinder 21. When ten 35 are provided, ten are provided for each lubricator 9.

As shown in FIG. 2, the relief valve unit 6 according to this embodiment includes a plurality (three in this embodiment) of stop valves 61, a plurality (three in this embodiment) of electromagnetic valves 62, A plurality of (four in this embodiment) relief valves 63 and one stop valve 64 are provided.
The stop valve 61 is a valve that is normally fully opened (fully opened when the corresponding electromagnetic valve 62 is normal) and is fully closed when an abnormality occurs in the corresponding electromagnetic valve 62. One side is arranged in parallel with each other.
On the other hand, the stop valve 64 is a bypass valve that is normally fully closed (fully closed when the relief valve 63 whose relief pressure is set to P1 is normal) and is fully opened when the pressure is temporarily leaked, It arrange | positions so that the relief pressure may be parallel to the relief valve 63 set to P1.

  When the pressure in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 6 reaches the set values P4, P3, P2, P1 (P4 <P3 <P2 <P1) of each valve, the relief valve 63 A part or all of the lubricating oil in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 6 is discharged, and the pressure in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 6 is changed to the pressure of each valve. This is a pressure control valve (temporary pressure setting valve) held at the set values P4, P3, P2 and P1.

  The solenoid valve 62 is disposed upstream of the relief valve 63 whose relief pressure is set to P4, and is opened when the rotational speed of the internal combustion engine (not shown) is within the range indicated by A on the horizontal axis of FIG. And is disposed on the upstream side of the (first) solenoid valve 62a that is closed when it is within the other range and the relief valve 63 in which the relief pressure is set to P3, and the rotational speed of the internal combustion engine is A (second) electromagnetic valve 62b that is open when it is within the range indicated by B on the horizontal axis in FIG. 3 and is closed when it is within the other range, and a relief valve whose relief pressure is set to P2. It is arranged upstream of 63 and is open when the rotational speed of the internal combustion engine is within the range indicated by C on the horizontal axis in FIG. 3, and is closed when it is within the other range (third). And a solenoid valve 62c.

  In the relief valve unit 6 configured as described above, when the rotational speed of the internal combustion engine is within the range indicated by A on the horizontal axis in FIG. 3, the lubricating oil main pipe positioned upstream from the relief valve unit 6. 2 is maintained at P4, and when the rotational speed of the internal combustion engine is within the range indicated by B on the horizontal axis of FIG. 3, the pressure in the lubricating oil main pipe 2 located upstream of the relief valve unit 6 is When the rotational speed of the internal combustion engine is within the range indicated by C on the horizontal axis of FIG. 3 while being held at P3, the pressure in the lubricating oil main pipe 2 located upstream from the relief valve unit 6 is held at P2. In addition, when the rotational speed of the internal combustion engine is within the range indicated by D on the horizontal axis of FIG. 3, the pressure in the lubricating oil main pipe 2 located upstream of the relief valve unit 6 is maintained at P1. Become.

  When an abnormality occurs in the electromagnetic valve 62 and the stop valve 61 located upstream is fully closed, the pressure in the lubricating oil main pipe 2 located upstream from the relief valve unit 6 is the relief pressure. It is held at P1 by the relief valve 63 set at P1.

  According to the cylinder lubrication device 1 according to the present embodiment, when the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine, the pressure of the lubricating oil in the lubricating oil main pipe 2 is low, and the rotational speed of the internal combustion engine is low. A relief valve comprising a hydraulic circuit that automatically changes the pressure of the lubricating oil in the lubricating oil main pipe 2 linearly or stepwise so that the pressure of the lubricating oil in the lubricating oil main pipe 2 becomes high when it is high. Since the unit 6 is provided, the lubrication speed (the lubrication period: the lubrication time) can be automatically adjusted according to the rotational speed of the internal combustion engine.

  Further, according to the internal combustion engine equipped with the cylinder lubrication device 1 according to the present embodiment, when the rotational speed of the internal combustion engine is low, lubrication is performed at a slow lubrication speed (long lubrication period: lubrication time). When the rotational speed of the engine is high, lubrication is performed at a fast lubrication speed (short lubrication period: lubrication time), and appropriate lubrication according to the rotational speed of the internal combustion engine is performed.

[Second Embodiment]
A cylinder lubrication device according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5.
The cylinder lubrication device 71 according to the present embodiment differs from that of the first embodiment described above in that a relief valve unit 72 is provided instead of the relief valve unit 6. Since other components are the same as those of the first embodiment described above, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

As shown in FIG. 4, the relief valve unit 72 according to this embodiment includes one stop valve 81, one proportional electromagnetic relief valve 82, one relief valve 83, and one stop valve. 84.
The stop valve 81 is a valve that is normally fully opened (fully opened when the proportional electromagnetic relief valve 82 is normal), and is fully closed when an abnormality occurs in the proportional electromagnetic relief valve 82. The proportional electromagnetic relief valve 82 on the upstream side of 82.
On the other hand, the stop valve 84 is a bypass valve that is normally fully closed (fully closed when the relief valve 83 whose relief pressure is set to P1 is normal) and is fully opened when the pressure is temporarily leaked, It arrange | positions so that the relief pressure may be parallel to the relief valve 83 set to P1.

  When the pressure in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 72 reaches the set value P1 of the valve, the relief valve 83 reaches the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 72. A pressure control valve (temporary pressure setting valve) that discharges a part or all of the lubricating oil in the inside and maintains the pressure in the lubricating oil main pipe 2 positioned upstream of the relief valve unit 72 at the set value P1 of the valve. ).

  As shown in FIG. 5, the proportional electromagnetic relief valve 82 linearly changes the pressure P in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 72 according to the rotational speed of the internal combustion engine, And it is the pressure control valve (temporary pressure setting valve) to hold | maintain.

  In the relief valve unit 72 configured in this way, when the rotational speed of the internal combustion engine increases, the pressure in the lubricating oil main pipe 2 positioned upstream of the relief valve unit 72 also increases, and the rotation of the internal combustion engine When the number decreases, the pressure in the lubricating oil main pipe 2 located on the upstream side of the relief valve unit 72 also decreases.

  When an abnormality occurs in the proportional electromagnetic relief valve 82 and the stop valve 81 located upstream is fully closed, the pressure in the lubricating oil main pipe 2 located upstream from the relief valve unit 72 is The relief pressure is set to P1 by the relief valve 83 set to P1.

  According to the cylinder lubrication device 71 according to the present embodiment, when the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine, the pressure of the lubricating oil in the lubricating oil main pipe 2 is low, and the rotational speed of the internal combustion engine is low. A relief valve comprising a hydraulic circuit that automatically changes the pressure of the lubricating oil in the lubricating oil main pipe 2 linearly or stepwise so that the pressure of the lubricating oil in the lubricating oil main pipe 2 becomes high when it is high. Since the unit 72 is provided, the lubricating speed (lubricating period: lubricating time) can be automatically adjusted according to the rotational speed of the internal combustion engine.

  Further, according to the internal combustion engine including the cylinder lubrication device 71 according to the present embodiment, when the rotational speed of the internal combustion engine is low, lubrication is performed at a slow lubrication speed (long lubrication period: lubrication time). When the rotational speed of the engine is high, lubrication is performed at a fast lubrication speed (short lubrication period: lubrication time), and appropriate lubrication according to the rotational speed of the internal combustion engine is performed.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Cylinder oil supply apparatus 2 Lubricating oil main pipe 6 Relief valve unit 7 Branch pipe 8 Solenoid valve 9 Lubricator 10 Oil supply pipe 21 Cylinder 22 Piston 31 Cylinder 32 Piston 33 Plunger 34 Cylinder 35 Cylinder oil supply port 71 Cylinder oil supply apparatus 72 Relief valve unit

Claims (3)

When the solenoid valve provided in the middle of the branch pipe opens, the lubricating oil in the lubricating oil main pipe regulated by the relief valve unit is led to the cylinder of the lubricator through the branch pipe, and the inside of the lubricator The piston of the internal combustion engine is pushed up by the piston and the plunger provided in the cylinder, and the lubricating oil filled in the cylinder that accommodates the plunger passes through the oil supply pipe and the cylinder oil supply port provided in the cylinder of the internal combustion engine. And a cylinder lubricating device injected between the piston of the internal combustion engine,
The branch pipe, the solenoid valve, and the lubricator are provided one by one for one cylinder of the internal combustion engine,
When the rotational speed of the internal combustion engine is low according to the rotational speed of the internal combustion engine, the relief valve unit has a low pressure of lubricating oil in the lubricating oil main pipe, and when the rotational speed of the internal combustion engine is high, It consists of a hydraulic circuit that changes the pressure of the lubricating oil in the lubricating oil main pipe linearly or stepwise and automatically so that the pressure of the lubricating oil in the lubricating oil main pipe becomes high,
The relief valve unit includes a plurality of relief valves corresponding to the number of revolutions of the internal combustion engine and a plurality of relief valves provided for each of the relief valves excluding the relief valve corresponding to the high number of revolutions of the internal combustion engine. A solenoid valve, and a stop valve that is provided corresponding to each solenoid valve and is fully closed when an abnormality occurs in the corresponding solenoid valve , and when the solenoid valve is abnormal, the stop valve The cylinder lubrication device is characterized in that the pressure of the lubricating oil in the lubricating oil main pipe is set to a pressure corresponding to the time when the rotational speed of the internal combustion engine is high.   An internal combustion engine comprising the cylinder lubrication device according to claim 1. When the solenoid valve provided in the middle of the branch pipe opens, the lubricating oil in the lubricating oil main pipe regulated by the relief valve unit is led to the cylinder of the lubricator through the branch pipe, and the inside of the lubricator The piston of the internal combustion engine is pushed up by the piston and the plunger provided in the cylinder, and the lubricating oil filled in the cylinder that accommodates the plunger passes through the oil supply pipe and the cylinder oil supply port provided in the cylinder of the internal combustion engine. And a cylinder lubricating method injected between the piston of the internal combustion engine,
The branch pipe, the solenoid valve, and the lubricator are provided one by one for one cylinder of the internal combustion engine,
According to the rotational speed of the internal combustion engine, when the rotational speed of the internal combustion engine is low, the pressure of the lubricating oil in the lubricating oil main pipe is low, and when the rotational speed of the internal combustion engine is high, lubrication in the lubricating oil main pipe is performed. The pressure of the lubricating oil in the lubricating oil main pipe is changed linearly or stepwise and automatically so that the oil pressure becomes high,
The relief valve unit includes a plurality of relief valves corresponding to the number of revolutions of the internal combustion engine and a plurality of relief valves provided for each of the relief valves excluding the relief valve corresponding to the high number of revolutions of the internal combustion engine. and the solenoid valve is fully closed when an abnormality occurs in the electromagnetic valve, and a plurality of stop valve provided corresponding to each of the solenoid valve, if an abnormality occurs in the electromagnetic valve, said stop A cylinder lubrication method , wherein the valve is fully closed so that the pressure of the lubricating oil in the lubricating oil main pipe is a pressure corresponding to the time when the rotational speed of the internal combustion engine is high.

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