JP2014066211A - Engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a connection pipe between an intercooler and a lubrication oil cooler for simplifying external appearance of the whole of an engine, reducing a weight, and decreasing a pressure drop of cooling water.SOLUTION: An engine 1 includes an intercooler 21 which cools air supplied to an engine body with cooling water, and a lubrication oil cooler 25 which cools lubrication oil lubricating the engine body with cooling water. The intercooler 21 and the lubrication oil cooler 25 are connected in series.

Description

  The present invention relates to engine technology, particularly to intercooler and lubricant cooler layout technologies.

  Conventionally, in an engine mounted on a ship, both an intercooler and a lubricating oil cooler, which are heat exchangers, are devices that use seawater as cooling water. An intercooler and a lubricant cooler are installed in the engine to cool separate fluids, such as air and lubricant, respectively.

  For example, in the engine shown in Patent Document 1, a cooling water pump (seawater pump) and a fresh water cooler are provided on the front surface, an intercooler is provided on the right side surface, and a lubricating oil cooler is provided on the left side surface. They are connected to each other by a plurality of cooling water pipes provided so as to surround the entire circumference of the engine. And the cooling water from a cooling water pump is guide | induced to a lubricating oil cooler, an intercooler, and a fresh water cooler, and is discharged | emitted from a fresh water cooler to the exterior. The cooling water cools the air in the intercooler, the lubricating oil in the lubricating oil cooler, and the fresh water in the fresh water cooler through heat exchange.

  In such an engine, the cooling water pipe (connection pipe) that connects the cooling water pump, lubricating oil cooler, intercooler, and fresh water cooler to each other is long, causing pressure loss and increasing the overall weight of the engine. Invite the complexity of the image.

JP 2005-299393 A

  The problem to be solved is to shorten the piping of the intercooler and the lubricating oil cooler so that the overall appearance of the engine is clean and the weight can be reduced and the pressure loss of the cooling water can be reduced. Is to provide.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, an engine comprising: an intercooler that cools air supplied to the engine body with cooling water; and a lubricating oil cooler that cools lubricating oil that lubricates the engine body with cooling water, The intercooler and the lubricating oil cooler are connected in series.

  According to a second aspect of the present invention, there is provided an engine comprising: an intercooler that cools the air supplied to the engine body with cooling water; and a lubricating oil cooler that cools the lubricating oil that lubricates the engine body with cooling water. The cooler and the lubricating oil cooler are provided on the same straight line in the longitudinal direction of the engine.

  According to a third aspect of the present invention, the intercooler includes a cooling passage through which cooling water passes, and an intake passage formed between the cooling passage and the outer wall, through which air passes. It is formed in a reverse funnel shape that spreads from the inlet toward the cooling passage.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, the connecting pipe for cooling can be shortened by connecting the intercooler and the lubricating oil cooler in series on the same straight line. Therefore, by shortening the piping of the intercooler and the lubricating oil cooler, the overall appearance of the engine can be made clear, the weight can be reduced, and the pressure loss of the cooling water can be reduced.

  In claim 2, by providing the intercooler and the lubricating oil cooler on the same straight line in the longitudinal direction of the engine, the appearance of the entire engine can be further improved, and the weight can be further reduced. The pressure loss of the cooling water can be reduced.

  According to the third aspect of the present invention, since the outer wall that forms the intake passage through which air passes is formed between the cooling passage and the inlet wall, the outer wall is formed in a reverse funnel shape that extends from the inlet passage toward the cooling passage. The air diffusibility can be improved.

1 is a perspective view showing an overall configuration of an engine according to an embodiment of the present invention. Similarly front view. Similarly right side view. The figure which shows the structure of an intercooler. (A) Front view of intercooler. (B) Rear view of intercooler.

Next, an engine 1 according to an embodiment of the invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing the overall configuration of an engine according to an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a right side view.

  In the following description, the side of the engine 1 where the exhaust manifold 12 is disposed is the front side (front side), and the opposite side is the back side (rear side). In the left-right direction, the left side when the observer looks at the front side of the engine 1 is the left side of the engine 1, and the right side is the right side of the engine 1.

  The engine 1 of this embodiment is a six-cylinder diesel engine mounted on a ship.

  The engine 1 includes an engine body, and an intake / exhaust system, a cooling water system, and a lubricating oil system that are installed in the engine body.

  The engine body includes a cylinder block 2 having a shape that extends long in the left-right direction. A plurality of (six in this embodiment) cylinders are formed in the cylinder block 2 in the vertical direction, and a piston is accommodated in each cylinder so as to be slidable in the vertical direction. A cylinder head 3 is provided at the upper end of the cylinder block 2, and an oil pan 4 is provided at the lower end of the cylinder block 2.

  The cylinder block 2 is provided with a crankshaft (not shown) that extends substantially horizontally in the left-right direction. A flywheel is attached to the left end of the crankshaft. The flywheel is covered with a flywheel housing 7 fixed on the left side of the cylinder block 2.

  A damper is attached to the right end of the crankshaft. The damper is covered with a damper case 8 fixed on the right side of the cylinder block 2.

  An intake manifold constituting a part of the intake system is formed on the left side of the front portion of the cylinder block 2. Further, an exhaust manifold 12 constituting a part of the exhaust system is provided in front of the cylinder head 3.

  The intake system of the engine 1 will be described.

  Among the intake / exhaust systems, the intake system mainly includes an air cleaner 13, a part of the supercharger 14, an intercooler 21, an intake manifold, and an intake port.

  The air cleaner 13 is provided above the exhaust manifold 12 and removes air supplied to the engine body. The air cleaner 13 is connected to the compressor case 14 a of the supercharger 14.

  The supercharger 14 is provided above the exhaust manifold 12. The supercharger 14 has a compressor case 14a containing a blower wheel (not shown) and a turbine case 14b containing a turbine wheel (not shown). The supercharger 14 is configured to transmit the rotational force of the turbine wheel by the exhaust gas to the blower wheel via the turbo shaft. Among these, the air cleaner 13 is connected to the compressor case 14a on the left side of the supercharger 14, and is configured to compress the air in the compressor case 14a with a blower wheel. The outlet of the compressor case 14 a of the supercharger 14 is connected to the intake inlet 21 c of the intercooler 21 via the supercharge pipe 15.

  The intercooler 21 is for cooling the air that has been compressed by the supercharger 14 and has reached a high temperature. The intercooler 21 is provided on the left side of the front surface of the cylinder block 2 where the intake manifold is formed. As shown in FIG. 4, the intercooler 21 is formed with an intake passage 21a through which air passes and a cooling passage 21b (core) through which seawater as cooling water passes. In the intake passage 21a, one intake inlet 21c and a plurality of intake outlets 21d, 21d, and 21d are formed. An intake inlet 21 c of the intake passage 21 a is provided in the upper part of the intercooler 21, and an intake outlet 21 d of the intake passage 21 a is provided at a position facing the intake manifold formed in the cylinder block 2. Further, the intake inlet 21c of the intake passage 21a is formed on the right side with respect to the center of the left and right of the intercooler 21. An intake outlet 21d of the intake passage 21a is connected to an intake manifold formed in the cylinder block 2 shown in FIGS. The intake manifold branches into the number of cylinders (six) as it goes to the cylinder (cylinder) side, and communicates with the cylinder (cylinder) via an intake port.

  Thus, the air is sucked into the air cleaner 13 and removed, and then compressed in the compressor case 14a of the supercharger 14 so that the temperature becomes high, and the air is supplied to the cooling passage (core) in the intercooler 21 via the supercharge pipe 15. It cools by contacting and passing through an intake passage, and is supplied into each cylinder through each intake port of the cylinder head 3 via an intake manifold.

  Next, the exhaust system of the engine 1 will be described.

  Of the intake / exhaust systems, the exhaust system mainly includes an exhaust port, an exhaust manifold 12, a turbine case 14b of the supercharger 14, and an exhaust pipe 16.

  The exhaust port is an exhaust passage for guiding exhaust gas discharged from each cylinder in the cylinder block 2 to the exhaust manifold 12. The exhaust port is formed in the cylinder head 3 and connected to the exhaust manifold 12.

  The exhaust manifold 12 collects exhaust gases from a plurality of exhaust ports into one exhaust passage. The exhaust manifold 12 is provided on the front side of the cylinder head 3. The exhaust manifold 12 is formed with an exhaust passage through which exhaust gas passes and a cooling passage through which cooling water passes. The exhaust passage is formed so that a plurality of (six in the present embodiment) inlets are aggregated into one outlet. The inlet of the exhaust passage of the exhaust manifold 12 is formed at a position corresponding to the exhaust port of the exhaust port, and the outlet of the exhaust passage of the exhaust manifold 12 is formed at the center of the left and right of the upper surface of the exhaust manifold 12. The outlet of the exhaust passage of the exhaust manifold 12 is connected to the turbine case 14 b of the supercharger 14.

  The turbine case 14b of the supercharger 14 is for rotating the turbine wheel by the exhaust gas from the exhaust manifold 12, and rotating the blower wheel in the connected compressor case 14a via the turbo shaft. The outlet of the turbine case 14b of the supercharger 14 is provided on the right side of the turbine case 14b, and the discharge pipe 16 is connected to the outlet of the turbine case 14b. On the outlet side of the discharge pipe 16, a flange portion for attaching an external guide pipe is formed.

  Thus, the exhaust gas passes through the exhaust ports of the cylinder head 3 from the cylinders and passes through the exhaust manifold 12 to be collected while being cooled, and after rotating the turbine wheel in the turbine case 14b of the supercharger 14. , Flows to the discharge pipe 16 and is discharged from the guide pipe (not shown) to the outside of the ship.

  Next, the cooling water system will be described.

  The cooling water system suppresses a temperature rise of an appropriate device or a fluid (gas or liquid) in the device by exchanging heat with the cooling water. The cooling water system of the engine 1 of the present embodiment includes a type using fresh water as a cooling water and a type using seawater.

  The cooling water system using fresh water is configured to circulate through the fresh water cooler 22, the water pump 23, the water jacket inside the cylinder block 2, the water jacket inside the cylinder head 3, the cooling passage inside the exhaust manifold 12, and the fresh water tank. .

The fresh water cooler 22 mainly includes a tank part, a cooler part, and a thermostat, and is for cooling while storing fresh water that cools the engine body.
The fresh water cooler 22 is supported by the cylinder block 2 via a bracket 22a on the right side of the exhaust manifold 12. The inlet of the fresh water cooler 22 is formed on the front surface of the fresh water cooler 22, and is a common inlet for the tank part at the upper part and the cooler part at the lower part in the fresh water cooler 22. A thermostat is provided between the inlet of the fresh water cooler 22 and the tank and cooler sections. This thermostat is led to the cooler if the temperature of fresh water flowing from the inlet is equal to or higher than a set value, and to the tank if it is lower than the set value.
Each of the tank part and the cooler part is formed with an outlet for discharging the fresh water inside, and is connected to an outlet formed on the lower surface of the fresh water cooler 22 after becoming a single discharge passage in the fresh water cooler 22. . The outlet of the fresh water cooler 22 is connected to the suction port of the water pump 23 via a fresh water connection pipe 41 (see FIG. 3).

  The water pump 23 is for pumping the fresh water in the fresh water cooler 22 into the engine body, and is provided on the right side surface of the cylinder block 2. The discharge port of the water pump 23 is connected to the right side surface of the cylinder block 2 through a connection pipe (not shown) and communicates with a water jacket in the cylinder block 2. The water jacket in the cylinder block 2 further communicates with the water jacket inside the cylinder head 3. The water jacket of the cylinder head 3 communicates with the inlet of the cooling passage of the exhaust manifold 12.

  The cooling passage of the exhaust manifold 12 is formed around the exhaust passage, and has six inlets through which cooling water flows and one outlet through which it flows. The six inlets are formed at predetermined intervals on the rear side of the exhaust manifold 12, that is, on the cylinder head 3 side. The outlet of the cooling passage of the exhaust manifold 12 is formed on the right side of the upper surface of the exhaust manifold 12. The outlet of the cooling passage is connected to the inlet of the fresh water cooler 22 via the connection pipe 43. The inlet of the fresh water cooler 22 is formed on the front surface of the fresh water cooler 22 and communicates with the inside of the fresh water cooler 22.

  That is, the fresh water is pumped from the fresh water cooler 22 by the water pump 23 through the fresh water connection pipe 41 and is pumped to the water jacket inside the cylinder block 2 and the water jacket inside the cylinder head 3 to each water jacket. The apparatus in contact therewith is cooled, and further flows into the cooling passage in the exhaust manifold 12 to cool the outside of the exhaust manifold 12, and then returns to the fresh water cooler 22 again. That is, fresh water circulates through a cooling system composed of these devices.

  The seawater cooling water system is mainly composed of a seawater pump 24, an intercooler 21, a lubricating oil cooler 25, and a fresh water cooler 22.

  The seawater pump 24 is for taking in seawater from the outside of the engine 1 and is provided on the left side of the cylinder block 2. An inflow pipe 44 is connected to the inlet of the seawater pump 24. A flange portion is formed on the inflow side of the inflow pipe 44 so that a guide pipe for guiding seawater outside the engine 1 is easily connected. The discharge port of the seawater pump 24 is connected to the inlet of the cooling passage 21 b of the intercooler 21 through the connection pipe 45.

  The intercooler 21 is for cooling the air that has become hot due to the compression of the supercharger 14, and is provided on the front surface of the cylinder block 2 in which the intake manifold is formed. The intercooler 21 is provided on substantially the same straight line as the connected lubricating oil cooler 25 with its longitudinal direction as the left-right direction. The cooling passage 21 b of the intercooler 21 has an inlet formed on the left side of the intercooler 21 and an outlet formed on the right side of the intercooler 21. The outlet of the cooling passage 21 b is connected to the inlet of the cooling passage of the lubricating oil cooler 25 through the connection pipe 46.

  The lubricating oil cooler 25 is for cooling the lubricating oil, and is arranged in series on the front surface of the cylinder block 2 on the same straight line as the intercooler 21. The lubricating oil cooler 25 includes a lubricating oil pipe through which lubricating oil flows and a cooling passage formed around the lubricating oil pipe. The inlet of the cooling passage is formed on the left side of the lubricating oil cooler 25, and the outlet of the cooling passage is formed on the right side of the lubricating oil cooler 25. The outlet of the lubricating oil cooler 25 is connected to an inlet formed on the front surface of the fresh water cooler 22 above the lubricating oil cooler 25 via a connection pipe 47.

  The fresh water cooler 22 is for cooling the fresh water in the above-mentioned cooler part with seawater. A pipe through which seawater from the lubricating oil cooler 25 passes is disposed in the cooler portion of the fresh water cooler 22, and the fresh water comes into contact with the pipe and is cooled. The outlet of the fresh water cooler 22 is formed so as to be positioned above the inlet on the front surface of the fresh water cooler 22. The outlet of the fresh water cooler 22 is connected to the discharge pipe 48. The exhaust pipe 48 has a flange portion on the outlet side so that a guide pipe (not shown) outside the engine 1 can be easily connected.

  That is, the seawater for cooling is pumped up from the outside of the engine 1 by the seawater pump 24 through the inflow pipe 44, flows into the cooling passage of the intercooler 21 through the connection pipe 45, and is brought into contact with the cooling passage. The cooling oil is cooled and further flows into the cooling passage of the lubricating oil cooler 25 through the connection pipe 46 to cool the lubricating oil in contact with the cooling passage, and then flows into the fresh water cooler 22 through the connection pipe 47 and flows into the fresh water cooler. After the 22 fresh water is cooled, it is discharged to the outside of the engine 1 through the discharge pipe 48 and the induction pipe.

  Next, the lubricating oil system will be described.

  The lubricating oil system is for supplying lubricating oil into the engine body and lubricating appropriate devices. The lubricating oil system mainly includes an oil pan 4, a lubricating oil pump in the casing 31, a lubricating oil passage in the lubricating oil cooler 25, a lubricating oil filter 32, and a lubricating oil bypass filter 33.

  The oil pan 4 is a lubricating oil tank in which lubricating oil is stored. The oil pan 4 is connected to a suction port of the lubricating oil pump via a connection pipe 51 connected to the right side of the oil pan 4.

  The lubricating oil pump is for pumping up lubricating oil in the oil pan 4, and is attached to the right side of the front surface of the cylinder block 2 via a casing 31. The discharge port of the lubricating oil pump is formed on the left side of the casing 31 and connected to the branch pipe 34.

  The branch pipe 34 is formed with one lubricating oil inlet and two lubricating oil outlets. The first discharge port 34 a, which is one of the discharge ports, is connected to the inlet of the lubricant passage on the lower right side of the lubricant cooler 25. The outlet of the lubricating oil passage is formed on the lower left side of the lubricating oil cooler 25 and is connected to the inlet at the top of the collecting pipe 35.

  The collecting pipe 35 mixes the lubricating oil cooled by the lubricating oil cooler 25 and the uncooled lubricating oil from the branch pipe 34 to obtain a lubricating oil having an appropriate temperature. An inlet is formed on the right side of the collecting pipe 35, and the second outlet 34b, which is the other outlet of the branch pipe 34, is connected to the inlet. Further, the outlet at the lower end of the collecting pipe 35 is an outlet for lubricating oil having an appropriate temperature, and is connected to the upper part of the lubricating oil filter 32.

  The lubricating oil filter 32 is for removing impurities and the like of the lubricating oil, and is provided on the front surface of the cylinder block 2. The discharge port of the lubricating oil filter 32 is connected to the inlet side of the connection pipe 52. The discharge side of the connection pipe 52 is branched into two, and one discharge port is connected to the front surface of the cylinder block 2. The other discharge port is connected to a lubricating oil bypass filter 33 on the right side of the lubricating oil filter 32 via a connecting pipe 53. The discharge side of the lubricating oil bypass filter 33 is connected to the oil pan 4.

  That is, the lubricating oil in the oil pan 4 pumped up by the lubricating oil pump is divided into two hands on the downstream side of the branch pipe 34. Then, one lubricating oil passes through the first discharge port 34 a of the branch pipe 34, passes through the lubricating oil cooler 25, is cooled, and flows into the collecting pipe 35. The other lubricating oil flows through the second discharge port 34b of the branch pipe 34 and flows into the collecting pipe 35 without being cooled. The cooled lubricating oil and the uncooled lubricating oil are merged in the collecting pipe 35, and the lubricating oil is set to an appropriate temperature. The lubricating oil having an appropriate temperature is separated into two by the connecting pipe 52 after impurities are filtered by the lubricating oil filter 32. Then, one lubricating oil flows into the cylinder block 2 and lubricates an appropriate device of the engine body, and then returns to the oil pan 4. The other lubricating oil returns to the oil pan 4 through the lubricating oil bypass filter 33.

  Next, the layout of the intercooler 21 and the lubricating oil cooler 25 will be described in detail.

  As described above, the intercooler 21 and the lubricating oil cooler 25 are connected in series on a substantially straight line via the connecting pipe 46 as shown in FIGS. 1 and 2. The conventional intercooler is provided on the surface opposite to the side where the lubricating oil cooler is disposed. Therefore, a connecting pipe that connects the intercooler and the lubricating oil cooler and allows seawater as cooling water to pass therethrough is provided so as to surround the entire circumference of the engine. Therefore, the connecting pipe connecting the intercooler and the lubricating oil cooler is inevitably long.

  In the engine 1 of this embodiment, the discharge port of the seawater pump 24, the intercooler 21, the lubricating oil cooler 25, and the inlet of the fresh water cooler 22 are provided on the front side (one side). Therefore, the connecting pipes 45, 46, and 47 that connect them to each other can be configured to be shorter.

  Further, the intercooler 21 and the lubricating oil cooler 25 are connected to each other via a connecting pipe 46 on the same straight line. The cooling passage 21b through which the cooling seawater flowing into the intercooler 21 flows is a substantially cylindrical core and is provided in the intercooler 21 with the left-right direction as the longitudinal direction. The cooling passage through which the cooling seawater flowing into the lubricating oil cooler 25 flows is also a substantially cylindrical core, and the lubricating oil flows through the gap between the core and the outer wall of the lubricating oil cooler 25, thereby cooling the lubricating oil. Is done. The core that is the cooling passage 21 b of the intercooler 21, the connection pipe 46, and the core that is the cooling passage of the lubricating oil cooler 25 are formed in a cylindrical shape having substantially the same inner diameter.

  As in the engine 1 of this embodiment, the connecting pipe 46 for cooling can be shortened by connecting the intercooler 21 and the lubricating oil cooler 25 in series on the same straight line. Therefore, by shortening the connecting pipe 46 between the intercooler 21 and the lubricating oil cooler 25, the overall appearance of the engine 1 can be made clear, the weight can be reduced, and the pressure loss of seawater as cooling water can be reduced. it can. Since the cooling connection pipe 46 can be shortened, the weight is reduced, the power weight ratio is improved, and the output characteristics are improved. Moreover, since the pressure loss of the seawater which is cooling water can be reduced, the force pumped by the seawater pump 24 can be reduced, leading to improvement of fuel consumption characteristics.

  The intercooler 21 and the lubricating oil cooler 25 are provided on the same straight line in the longitudinal direction of the engine, that is, in the left-right direction. Therefore, the appearance of the engine 1 as a whole can be improved, the weight can be further reduced, and the pressure loss of the seawater that is cooling water can be further reduced.

  Further, the outer wall of the intercooler 21 is formed such that the width in the left-right direction increases as it goes from the intake inlet 21c of the intake passage 21a in the upper part of the intercooler 21 to the lower part. Since the intake inlet 21c of the intercooler 21 is closer to the outlet side than the inlet side of the cooling passage 21b, the outer wall at the top of the intercooler 21 has a reverse funnel shape that extends greatly to one side (the inlet side of the cooling passage 21b that is the core). Is formed.

  That is, the outer wall that forms the intake passage through which the air passes is formed in a reverse funnel shape that extends from the inlet of the intake passage to the cooling passage, so that the air flowing into the intercooler 21 Diffusibility can be improved.

1 Engine 21 Intercooler 21a Intake passage 21b Cooling passage 21c Intake inlet 21d Intake outlet 25 Lubricating oil cooler 46 Connecting pipe

Claims (3)

An intercooler that cools the air supplied to the engine body with cooling water;
A lubricating oil cooler that cools the lubricating oil that lubricates the engine body with cooling water;
An engine comprising
The engine, wherein the intercooler and the lubricating oil cooler are connected in series. An intercooler that cools the air supplied to the engine body with cooling water;
A lubricating oil cooler that cools the lubricating oil that lubricates the engine body with cooling water;
An engine comprising
The engine, wherein the intercooler and the lubricating oil cooler are provided on the same straight line in the longitudinal direction of the engine. The intercooler is
A cooling passage through which the cooling water passes, and an intake passage formed between the cooling passage and the outer wall through which air passes,
3. The engine according to claim 1, wherein the outer wall is formed in a reverse funnel shape that expands from an inlet of the intake passage toward the cooling passage. 4.

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