JP2014077376A - Engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine which improves the workability of replacement and repair of a lubricant pump thereby reducing the maintenance cost.SOLUTION: An engine includes a lubricant pump 9 which pumps a lubricant in an oil pan 4. In the engine, a gear casing 81 incorporating gears for transmitting power to the lubricant pump 9 is attached to an engine body, and the lubricant pump 9 is attached to the gear casing 81. Further, the gear casing 81 protrudes from a cylinder block forming the engine body.

Description

  The present invention relates to an arrangement structure of a lubricating oil pump in an engine.

  Conventionally, in an engine, lubricating oil is used to lubricate the inside of the engine body. This lubricating oil is stored in an oil pan and supplied by being pumped into the engine body by a lubricating oil pump.

  For example, as shown in Patent Document 1, a lubricating oil pump is provided inside an oil pan and is fixed to a cylinder block in the vicinity of a crankcase. Therefore, in order to replace or repair the lubricating oil pump, it is necessary to first remove the oil pan and then remove the lubricating oil pump from the cylinder block. Therefore, replacement and repair of the lubricating oil pump are complicated operations.

JP 2006-207401 A

  The problem to be solved is to provide an engine capable of reducing maintenance costs by improving workability of replacement / repair of the lubricating oil pump.

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

  That is, according to claim 1, in an engine including a lubricating oil pump that pumps lubricating oil in an oil pan, a gear casing having a gear that transmits power to the lubricating oil pump is attached to the engine body, and the gear casing is attached to the gear casing. A lubricating oil pump is attached.

  According to a second aspect of the present invention, the gear casing is protruded from the engine body.

  According to a third aspect of the present invention, a lubricating oil passage is provided in the gear casing.

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

  According to the present invention, when replacing or repairing the lubricating oil pump, it is only necessary to remove the lubricating oil pump from the gear casing attached to the engine body, thereby improving workability and reducing maintenance costs. Can be planned.

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 front view of a casing. The right view of a casing. The exploded front view of a casing. Similarly exploded rear view. Similarly disassembled perspective view. The right view of the pump casing which incorporated the lubricating oil pump.

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 viewer 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 (for example, a small fishing boat) or the like.

  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 (six in this embodiment) of cylinders are formed in the cylinder block 2 in the vertical direction, and pistons are accommodated in the cylinders 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.

  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. An outlet of the compressor case 14 a of the supercharger 14 is connected to an intake inlet of the intercooler 21 through a 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. The intercooler 21 is formed with an intake passage through which air passes and a cooling passage (core) through which seawater as cooling water passes. One intake inlet and a plurality of intake outlets are formed in the intake passage. An intake inlet of the intake passage is provided at an upper portion of the intercooler 21, and an intake outlet of the intake passage is provided at a position facing an intake manifold formed in the cylinder block 2. Further, the intake inlet of the intake passage is formed on the right side of the left and right center of the intercooler 21. The intake outlet of the intake passage 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.

  The exhaust system of the engine 1 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 after being formed as one discharge passage in the fresh water cooler 22, to the outlet formed on the lower surface of the fresh water cooler 22 of the fresh water cooler 22. It is connected with. 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 tank 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 72 (see FIG. 4) 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 72 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 72 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 a fresh water tank inside the fresh water cooler 22.

  That is, fresh water is pumped out of the fresh water tank in the fresh water cooler 22 by the water pump 23 through the fresh water connection pipe 41 and is pumped to the water jacket in the cylinder block 2 and the water jacket in the cylinder head 3. The apparatus in contact with each water jacket is cooled, and further flows into the cooling passage 72 in the exhaust manifold 12 to cool the outside of the exhaust manifold 12, and then returns to the fresh water tank 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 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 is connected to the inlet of the cooling passage of the lubricating oil cooler 25 via 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 the seawater from the lubricating oil cooler 25 passes is disposed in the cooler portion of the fresh water cooler 22, and the fresh water contacts the pipe and is cooled. The outlet of the fresh water cooler 22 is formed on the front surface of the fresh water cooler 22 so as to be positioned above the inlet. 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 connecting pipe 46 to cool the lubricating oil in contact with the cooling passage, and then flows into the fresh water cooler 22 through the connecting pipe 47 and is supplied to the fresh water tank. After the fresh water in the inside 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 9, 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 the suction port of the lubricating oil pump 9 via a connection pipe 51 connected to the right side of the oil pan 4.

  The lubricating oil pump 9 is for pumping up the 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 9 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 9 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 brought to an appropriate temperature. The lubricating oil having an appropriate temperature is separated into two in 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 configuration of a casing 31 that is a part of the lubricating oil pump 9 and that has a built-in gear, and the mounting structure of the casing 31 will be described with reference to FIGS. 1 and 4 to 9.

  The casing 31 mainly includes a gear casing 81 with a built-in gear and a pump casing 82 which is a part of the lubricating oil pump 9 and is configured to be split into right and left. The casing 31 is provided at the lower right of the front surface of the cylinder block 2 so that the casing 31 protrudes outward from the front surface of the cylinder block 2.

  The gear casing 81 protects the gear by covering a gear (not shown) that operates the lubricating oil pump 9 and is fixed to the cylinder block 2 to provide the gear on the side surface of the cylinder block 2. The gear casing 81 has a passage for supplying lubricating oil to the lubricating oil pump 9. The gear casing 81 has a main body portion 811 for covering a built-in gear as a main structure. The main body portion 811 is formed of upper, lower, front, and left and right side walls, and these side walls form a space in which a gear can be built. The main body portion 811 has a shape in which a lower portion on the front side is cut off in a side view. As shown in FIG. 7, an opening 812 is formed on the rear side of the main body portion 811 so that the gear can be taken in and out, and the driving force from the engine main body can be transmitted to the gear. A mounting portion 813 that protrudes outward is formed around the opening 812. Mounting holes 831... That allow the gear casing 81 to be mounted to the cylinder block 2 are formed in the mounting portion 813.

  As shown in FIG. 6, a suction port 814 is formed in the lower portion of the right side surface of the main body portion 811, and a discharge port 815 is formed in the lower portion of the left side surface of the main body portion 811. The suction port 814 and the discharge port 815 are connected by a lubricating oil passage 816 so that the lubricating oil can pass from the suction port 814 to the discharge port 815. An opening 817 is formed above the discharge port 815 on the left side surface of the main body 811, and the gear in the gear casing 81 and the lubricating oil pump 9 in the pump casing 82 can be connected through the opening 817. A mounting portion 832 is formed around the opening 817 and the discharge port 815 so as to protrude to the left side of the left side surface of the main body portion 811. A plurality of mounting holes 835 are formed in the mounting portion 832 so that the pump casing 82 can be mounted (see FIG. 8). A mounting portion 833 that protrudes outward is formed around the other suction port 814. The attachment portion 833 has a bolt hole at the same position as the connection pipe 51. Above the suction port 814, an operation that is an opening for performing an operation of fixing the gear inside the main body portion 811 or inspecting a gear in the gear casing 81 after the gear casing 81 is fixed to the cylinder block. A window 818 is formed. A mounting portion 834 for fixing the closing plate 84 is formed around the operation window 818 so as to protrude outward from the right side surface of the main body portion 811. Bolt holes are respectively formed in the attachment portion 834 and the plate-like obstruction plate 84, and the obstruction plate 84 is fixed to the attachment portion 834 by screwing bolts 85... Into the operation window 818. Is blocked.

  The pump casing 82 is a protective member of the lubricating oil pump 9 for pumping the lubricating oil from the oil pan 4 to an appropriate member, and fixes the entire lubricating oil pump 9 to the cylinder block 2 via the gear casing 81. Is to do. As shown in FIGS. 6, 8, and 9, the main body portion 821 has a main structure of the pump casing 82, and has a shape having a space in which the pump gear mechanism 91 built in the pump casing 82 can be accommodated. . A suction port 822 is formed in the lower part on the right side of the main body part 821, and a discharge port 823 is formed in the upper part on the left side of the main body part 821. The suction port 822 and the discharge port 823 are formed so as to communicate with a space for incorporating the pump gear structure 91 of the main body portion 821. An opening 824 is formed on the right side of the main body 821 above the suction port 822 so that a part of the pump gear mechanism 91 built in the main body 821 protrudes from the opening 824 so that it can be connected to the gear in the gear casing 81. Is formed. A mounting portion 825 that protrudes outward from the main body portion 821 is formed around the opening 824 and the suction port 822. A protrusion 826 that protrudes to the right side, that is, the gear casing 81 side, is formed around the opening 824 of the mounting portion 825. The shape of the outer periphery of the protrusion 826 is formed in accordance with the shape of the opening 817 of the gear casing 81. A plurality of bolt holes 827... Are formed in the mounting portion 825 at positions corresponding to the mounting holes 835. A mounting portion 828 is formed around the other discharge port 823, and mounting holes 829, 829, and 829 are formed at the same position as the flange portion of the branch pipe 34.

Next, a procedure for attaching the casing 31 to the cylinder block 2 will be described.
First, a gear casing 81 is fixed to the cylinder block 2 in a state where a gear is built in and a closing plate 84 is attached with a bolt 85. Specifically, the mounting holes 831 in the mounting portion 813 of the gear casing 81 are aligned with holes formed at predetermined positions on the front surface of the cylinder block 2 and fastened with bolts 83. The lubricating oil pump 9 is fixedly attached to the gear casing 81 by attaching the pump casing 82 to the gear casing 81. Specifically, the bolt holes 827... In the mounting portion 825 of the pump casing 82 are aligned with the mounting holes 835... In the mounting portion 832 of the gear casing 81 and fastened with bolts 87. At this time, the gear casing 81 and the pump casing 82 are easily positioned by aligning the protrusion 826 of the pump casing 82 with the opening 817 of the gear casing 81. Then, with the pump casing 82 fixed to the cylinder block 2 via the gear casing 81, the connecting pipe 51 is connected to the suction port 814 (mounting portion 833) of the gear casing 81 as shown in FIG. Fasten with 86, 86, 86. The branch pipe 34 is connected to a discharge port 823 (attachment portion 828) of the pump casing 82 and fastened with bolts 88, 88, 88.

  As described above, the gear casing 81 is externally attached to the cylinder block 2 constituting the engine body, and the lubricating oil pump 9 is attached to the externally attached gear casing 81. Since the replacement of the lubricating oil pump to the capacity and the repair when the lubricating oil pump 9 breaks down can be performed simply by removing the lubricating oil pump 9 from the gear casing 81, workability can be improved. . Furthermore, an engine with reduced maintenance costs can be provided.

  By projecting the gear casing 81 from the cylinder block 2 constituting the engine body, only the lubricating oil pump 9 can be easily removed from the gear casing 81. In addition, the gear casing 81 can be removed from the cylinder block 2 more easily, and workability can be improved.

  Further, since the lubricating oil passage 816 is provided in the gear casing 81, parts are shared and there is no need to provide a separate passage.

1 Engine 2 Cylinder block 4 Oil pan 31 Casing 81 Gear casing 82 Pump casing

Claims (3)

In an engine equipped with a lubricating oil pump that pumps lubricating oil in an oil pan,
An engine characterized in that a gear casing containing a gear for transmitting power to a lubricating oil pump is attached to an engine body, and the lubricating oil pump is attached to the gear casing.   The engine according to claim 1, wherein the gear casing is protruded from the engine body.   The engine according to claim 1, wherein a lubricating oil passage is provided in the gear casing.

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