JP2019120181A - Oil cooling tool and engine - Google Patents

Abstract

To provide an oil cooling tool improved in cooling performance of an oil to reduce a size of an oil cooler corresponding to an engine by reviewing a structure, and to provide the engine to which the oil cooling tool can be properly applied.SOLUTION: In an engine, an oil transport device A is disposed to supply an oil discharged from an oil pump 14 to an oil supply object 12, an oil connection mechanism u is disposed to communicate different oil passages 18, 12i to each other in the oil transport device A, and an oil cooling tool r is used in the oil connection mechanism u. The oil cooling tool r is constituted by disposing a heat radiation member 25 on a gasket used in the oil connection mechanism u to communicate the different oil passages 17, 18 to each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an oil cooler capable of cooling oil in an engine such as an industrial diesel engine, and an engine equipped with the oil cooler.

  In a diesel engine with a turbocharger (turbocharger) using exhaust gas, the oil (engine oil) after lubrication of the turbocharger becomes a high temperature, so install an oil cooler for oil cooling and an oil cooler. There are many. Conventionally, the oil cooling device disclosed in Patent Document 1 is known.

  For example, in the case of cooling the supercharger by oil circulation, it is necessary to provide an oil cooler to cool the oil. In this case, as a cooling means of the oil cooler, one having a structure in which cooling water is piped to water-cool the oil cooler is generally used.

Japanese Utility Model Publication No. 02-4935

  In a conventional supercharged engine, when trying to downsize the engine, it is also required to downsize the oil cooler as well. However, if the size reduction rate (reduction rate) of the oil cooler is matched with the size reduction rate of the engine, the heat radiation may not catch up and the oil temperature may rise excessively.

  If the oil temperature is excessively high, the wear of sliding parts such as bearings is promoted, resulting in a problem that the durability of the engine is reduced. In order to solve this problem, it is considered that only the oil cooler should be set large. However, this causes a new problem such as a lack of arrangement space or an increase in cost, which is difficult to realize.

  An object of the present invention is to provide an oil cooler in which oil cooling performance is improved such that the size of an oil cooler adapted to an engine can be reduced by structural review. Another object is to obtain an engine to which the oil cooler has been successfully applied.

The present invention relates to an oil cooler,
A heat dissipating member 25 is provided on the connection component 26 used in the oil connection mechanism u for communicating the different oil paths 17 and 18 with each other.

The second invention relates to an oil cooler according to the invention,
The heat dissipating member 25 is characterized by including a metal heat dissipating fin 25A integrally attached to the connecting part 26.

A third aspect of the present invention is an oil cooler according to the present invention,
The heat radiation member 25 is characterized by including a heat pipe 28 integrally attached to the connection part 26.

A fourth aspect of the present invention is the oil cooler according to any of the third to the third aspects of the present invention,
The connection part 26 is characterized in that it is a gasket used in a state of being passed through a union bolt 24.

A fifth invention is the oil cooler according to the fourth invention,
By integrating the pair of the gaskets 26, 26 with the heat dissipation member 25 such that the gaskets 26, 26 can be arranged on both sides of the oil connection sleeve 23 so as to be separated from each other. It is characterized in that it is configured.

The sixth invention relates to an engine,
An oil transfer device A for supplying oil discharged from the oil pump 14 to the oil supply target 12 is provided, and an oil connection mechanism u is provided for connecting the different oil paths 18, 12i in the oil transfer device A with each other. The oil cooler according to any one of the present invention to the fifth invention is used in the oil connection mechanism u.

A seventh invention is the engine according to the sixth invention,
The oil connection mechanism u is characterized in that an oil inlet 12i which is the oil path in the supercharger which is the oil supply target 12 is communicated with an oil pipe which is the oil path 18.

An eighth aspect of the invention is the engine according to the sixth aspect of the invention,
The oil connection mechanism u is characterized in that an oil outlet 1a, which is the oil path related to the oil filter 15, and an oil pipe 18 which is the oil path communicate with each other.

A ninth aspect of the present invention is the engine according to any one of the sixth to eighth aspects of the present invention,
The heat radiating member 25 is characterized in that it is extended toward the location where the engine cooling air w is extended.

  According to the present invention, since the heat dissipation member is provided to the connection part used in the oil connection mechanism, it is a simple and economical means that does not change the structure or add a dedicated part. The connecting parts can be cooled, and thus rationally allow oil cooling.

  Further, in the engine having the oil conveying device A provided with the oil cooler, the oil cooling can be efficiently performed, and the oil cooler can be made unnecessary or miniaturized.

  As a result, it is possible to provide an oil cooler in which the oil cooling performance is improved such that the size of the oil cooler adapted to the engine can be reduced by the structural review. In addition, the oil cooler can be successfully applied to provide an engine whose durability can be improved.

Schematic showing the side of the engine equipped with oil cooler The perspective view of an oil cooler is shown, (a) is Embodiment 1, (b) is Embodiment 2. Side view showing a structural example of the oil connection mechanism

  Hereinafter, embodiments of an oil cooler according to the present invention and an engine equipped with the oil cooler will be described with reference to the drawings.

  FIG. 1 shows a schematic view (schematic view) of an industrial diesel engine (hereinafter abbreviated as an engine) E which is an example of the engine. In the engine E, a cylinder head 2 is assembled on a cylinder block 1, and a cylinder head cover 3 is assembled on the cylinder head 2. Below the cylinder block 1, an oil pan 4 is assembled, and on the front side, transmission cases 5 and 5 are assembled.

  In front of the cylinder block 1, a transmission belt 9 wound around a drive pulley a of the crankshaft 6, a pump pulley 7a of the water pump shaft 7 and a passive pulley 8a of the alternator 8 is provided. An engine cooling fan 10 is provided at the tip of the water pump shaft 7. An exhaust manifold 11 is disposed on the left and right sides of the cylinder head 2, and a supercharger 12 is disposed on the side of the cylinder head cover 3 above the exhaust manifold 11.

  The supercharger 12 is configured to include an exhaust turbine 12A driven by exhaust gas, a compression turbine 12B that compresses air, and a turbo bearing portion 12C. Reference numeral 13 denotes an exhaust passage for sending the exhaust gas of the exhaust manifold 11 to the exhaust turbine 12A. That is, the engine E is configured as a so-called turbocharged diesel engine.

  As shown in FIG. 1, an oil conveying device including an oil pump 14 for supplying engine oil (hereinafter simply referred to as oil) to each sliding portion of the engine E, and an oil filter 15 for filtering oil. A is equipped. The oil conveying device A includes various oil paths 16 to 19 for conveying oil.

  The first oil passage 16 is an internal oil passage connecting the oil pump 14 and the filter inlet 15 a of the oil filter 15, and is formed in the cylinder block 1. The second oil passage 17 is an internal oil passage connecting the filter outlet 15 b of the oil filter 15 and the oil outlet 1 a of the cylinder block 1. The third oil passage 18 is an oil passage connecting the oil outlet 1a and the inlet oil passage 12i of the turbo bearing portion 12C, and is constituted by an external pipe.

  The fourth oil passage 19 is an internal oil passage for returning the oil coming out of the outlet oil passage 12d of the turbo bearing portion 12C of the turbocharger (an example of the oil supply target) 12 to the oil pan 4. Further, the fifth oil passage 20 is a main oil passage for supplying oil to each sliding portion (not shown) of the engine E such as a valve operating device (not shown). Reference numeral 21 denotes a suction port of the oil pump 14 and a strainer disposed in the oil pan 4.

  As shown in FIG. 1, an oil connection mechanism u is provided which allows different oil paths in the oil conveyance device A to communicate with each other, and an oil cooler r using a connection component 22 used for the oil connection mechanism u. Is provided. Next, examples of the oil connection mechanism u and the oil cooler r will be described.

Embodiment 1
As shown in FIG. 1 and FIG. 3, a first oil connection mechanism u1 (u) is provided which causes the second oil passage 17 and the third oil passage (oil piping) 18 to communicate with each other. The first oil connection mechanism u1 is configured of a base (oil connection base) 23 on the base end side of the third oil path 18, a first oil cooling tool r1 (r), and a union bolt 24.

  As shown in FIG. 3, the base 23 is a known component provided at the end of the metal pipe or the synthetic resin tube that constitutes the third oil passage 18. The mouthpiece 23 has an annular connecting ring 23A in which an inner circumferential groove (not shown) communicating with the third oil path 18 is formed, and the union bolt 24 can be inserted through the connecting ring 23A. The union bolt 24 is a vertical hole internally formed in the bolt shaft portion 24a in a state in which two crosswise or one-letter-like horizontal holes (not shown) communicating with the inner circumferential groove (not shown) of the mouthpiece 23 communicate with two horizontal holes. (Not shown).

  As shown in FIG. 2A and FIG. 3, the first oil cooler r <b> 1 includes a heat dissipation member 25 and a pair of gaskets (gasket portions) 26 and 26. That is, the heat dissipating members are arranged such that the pair of gaskets 26 and 26 are separated from each other by an interval that enables the gaskets (an example of connection parts) 26 and 26 to be disposed on both sides of the oil connection cap 23. The first oil cooler r1 is configured by integrating at 25.

  As shown in FIG. 3, the heat dissipating member 25 includes a heat dissipating main body 25 </ b> A extended in a vane shape and a U-shaped connecting portion 25 </ b> B connecting the pair of gaskets 26. The first oil cooler r1 is a single component in which the heat radiating member 25 and the pair of gaskets 26, 26 are formed of a material (copper alloy, brass, aluminum alloy, etc.) having excellent thermal conductivity. The heat transmitted to the gaskets 26 can be dissipated by the heat radiation from the heat radiating member 25 having a large area.

  Focusing on a pair of annular gaskets which are essential components (seal components) as the oil connection mechanism u, the oil cooler r is provided with the heat radiation members 25 straddling the gaskets 26. Therefore, the oil connection mechanism u is excellent, that is, oil can be cooled while the number of parts as the oil connection mechanism u is reduced. The heat dissipating body 25 </ b> A is formed of an oblong (or strip or long rectangular) heat dissipating fin.

  Then, as shown in FIG. 1, the first oil cooler r1 is attached to the side of the cylinder block 1 in a state where the heat radiation member 25 extends slightly upward and obliquely upward. Therefore, at the time of operation of the engine E, the engine cooling air w by the engine cooling fan 10 is extended to the heat dissipation member 25, and the first oil cooler r1 can be efficiently cooled by heat dissipation and air cooling.

Second Embodiment
As shown in FIG. 1 and FIG. 3, a second oil connection mechanism u2 (u) is provided to connect the third oil passage 18 consisting of oil piping and the inlet oil passage (oil inlet) 12i. The second oil connection mechanism u2 is configured of a base (oil connection base) 23 on the base end side of the third oil path 18, a second oil cooler r2 (r), and a union bolt 24. Note that, for the sake of simplicity, the drawing showing the second oil connection mechanism u2 is also used as FIG. 3 showing the first oil connection mechanism u1.

  As shown in FIG. 3, the second oil connection mechanism u2 is basically the same as the first oil connection mechanism u1 except that the second oil cooler r2 is slightly different from the first oil cooler r1. The description of the base 23 and the union bolt 24 is omitted here.

  As shown in FIG. 2 (b) and FIG. 3, the second oil cooler r <b> 2 includes a heat dissipation member 25 and a pair of gaskets (gasket portions) 26 and 26. That is, by integrating the pair of gaskets 26, 26 with the heat dissipating member 25 so that the gaskets 26, 26 can be disposed on both sides of the oil connection sleeve 23 so as to be separated from each other. The second oil cooler r2 is configured.

  As shown in FIG. 3, the heat dissipating member 25 includes a heat dissipating main body 25 </ b> A extended in a vane shape and a U-shaped connecting portion 25 </ b> B connecting the pair of gaskets 26. In the second oil cooler r2, the heat pipe 28 is adopted as the heat dissipating body 25A, and is integrated with the connecting portion 25B by welding or the like. The heat transmitted to the gaskets 26 can be dissipated more efficiently by the heat dissipating member 25 made of the heat pipe 28 for cooling.

  Focusing on a pair of annular gaskets which are essential components (seal components) as the oil connection mechanism u, the oil cooler r is provided with a heat pipe-made heat radiating member 25 straddling the gaskets 26 and 26. It is an excellent feature that enables the oil connection mechanism u, that is, more efficient cooling of the oil, while reducing the number of parts as the oil connection mechanism u.

  Then, as shown in FIG. 1, the second oil cooler r2 is attached to the turbo bearing portion 12C of the turbocharger 12 in a state in which the heat radiating member 25 extends slightly obliquely forward and upward. Therefore, when the engine E is operating, the engine cooling air w by the engine cooling fan 10 is extended to the heat radiating member 25 made of the heat pipe 28, and the second oil cooler r2 is efficiently cooled by heat radiation and air cooling. can do.

  As described above, in this engine E, oil coolers r having a large heat radiation effect while being inexpensive by using the structure of the oil connection mechanism u are equipped at two places of the oil conveyance device A. Therefore, the oil that is likely to be high temperature by the turbo can be cooled during transportation while effectively utilizing the engine cooling air w, so that there is an advantage that the oil cooler may be unnecessary or small.

And according to oil cooling tool r by this invention, the effect as described in following (1)-(3) is obtained.
(1) Since the temperature of the oil (engine oil) can be lowered without difficulty, the service life of the oil can be extended, and the durability of the engine can be improved.

(2) Since the oil temperature can be reduced without difficulty, it is possible to reduce the frequency of oil maintenance and other maintenance work. Therefore, the running cost can be reduced.
(3) The number of parts can be reduced while obtaining the effects of the above (1) and (2), and an inexpensive and compact engine can be provided.

[Another embodiment]
As shown by a phantom line in FIG. 2A, the first oil cooler r1 may be smaller than the heat dissipating body 25A and may have a plurality of cooling fins 27 attached thereto. Although not shown, a second oil cooler r2 having cooling fins 27 is also possible.
As a connection part (26), a union heat pipe 24 may be used, such as attaching a belt-like heat pipe or a heat dissipating metal to a bolt head. Moreover, the nozzle 23 is also possible.

The oil supply target includes, in addition to the turbocharger 12, various sliding parts such as a cylinder cylinder and a valve gear.
The oil connection mechanism u can be applied to various configurations such as connection of an oil supply target and an oil path, and oil supply targets, in addition to connection of oil paths.
Although not shown, the oil cooler r may be configured such that a single gasket (connection component) 26 is provided with a heat dissipating member 25 composed of a heat dissipating fin 25A and a heat pipe 28.

1a Oil outlet 12 oil supply target, supercharger 12i oil passage, oil inlet 14 oil pump 15 oil filter 17 oil passage 18 oil passage, oil piping 23 oil connection cap 24 union bolt 25 heat radiation member 25A heat radiation fin 26 parts for connection , Gasket 28 Heat pipe A Oil transport device r Oil cooler u Oil connection mechanism w Engine cooling air

Claims (9)

  An oil cooler comprising a heat dissipating member provided on a connecting part used in an oil connecting mechanism which allows different oil paths to communicate with each other.   The oil cooling tool according to claim 1, wherein the heat dissipating member includes a metal heat dissipating fin integrally attached to the connecting part.   The oil cooler according to claim 1, wherein the heat dissipating member comprises a heat pipe integrally attached to the connection part.   The oil cooler according to any one of claims 1 to 3, wherein the connecting part is a gasket used in a state of being passed through a union bolt.   5. The heat dissipation member according to claim 4, wherein the pair of the gaskets are integrated by the heat dissipation member such that the gaskets are separated from each other at intervals that allow the gaskets to be disposed on both sides of the oil connection mouthpiece. Oil cooler described.   6. An oil transfer device for supplying oil discharged from an oil pump to an oil supply target is provided, and an oil connection mechanism for connecting mutually different oil paths in the oil transfer device is provided. An engine, wherein the oil cooler according to any one of the preceding claims is used in the oil connection mechanism.   The engine according to claim 6, wherein the oil connection mechanism communicates an oil inlet as the oil path in the supercharger to which the oil is supplied and an oil pipe as the oil path.   The engine according to claim 6, wherein the oil connection mechanism communicates an oil outlet that is the oil path related to an oil filter with an oil pipe that is the oil path.   The engine according to any one of claims 6 to 8, wherein the heat dissipating member is extended toward a location where engine cooling air flows.

Images