JP2008309045A - Oil pan structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil pan structure capable of inhibiting a drop in the viscosity of oil supplied to a lubrication path. <P>SOLUTION: This oil pan structure is provided with a first oil pan 11, a second oil pan 21, a first passage 13 connecting the first oil pan and the second oil pan, a first pump 15 provided in the first passage 13 and feeding oil in the first oil pan to the second oil pan, a second passage 23 connecting the second oil pan and a lubrication path of a lubrication part 3, a second pump 25 provided in the second passage 23 and feeding oil in the second oil pan to the lubrication path, and transmission parts 14, 24 provided in the first passage 13 and the second passage 23 and transmitting heat of oil flowing in the first passage to oil flowing in the second passage. Heat of the oil passing through the first passage is not radiated at the second oil pan exposed to an outside air and oil passing through the second passage can be heated. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an oil pan structure having two chambers, which can suppress an increase in viscosity of oil supplied to a lubrication path. The oil pan structure can be applied to a lubricating part such as a movable part of an internal combustion engine and a general machine.

  As an oil pan provided in an internal combustion engine, a general machine, or the like, there is an oil pan having a two-chamber structure separated by a partition wall. In such an oil pan structure, a second oil pan is provided so as to cover the first oil pan on the lubricating portion side, and the first oil pan and the second oil pan are passed through the oil pump and the bubble separator. After oil is pumped through the passage, the oil is further pumped through the first passage through the lubrication path such as the lubrication section via the oil pump (see Patent Document 1). . Such an oil pan structure can be in a state where almost no oil stays in the first oil pan.

JP-A-5-296018 (second page, FIG. 2)

However, in the structure in which the second oil pan is provided so as to cover the first oil pan on the lubrication part side as in Patent Document 1, the outer wall of the second oil pan is exposed to the outside air. Oil is easily cooled by outside air. For this reason, the viscosity of the oil is likely to increase due to the temperature drop, and this oil may be sent to the lubrication path as it is, causing problems such as pressure loss in the lubrication path. It has been studied to prevent the oil temperature from dropping too much.
The present invention has been made in view of the above circumstances, and solves the problem of providing an oil pan structure capable of suppressing an increase in the viscosity of oil supplied to a lubrication path in an oil pan structure including two chambers. It should be a challenge.

The present invention is as follows.
1. A first oil pan that receives oil delivered from the lubricating portion, a second oil pan that is provided adjacent to the outer wall of the first oil pan, and the first oil pan and the second oil pan are connected to each other. A first passage, a first pump provided in the first passage and sending oil in the first oil pan to the second oil pan, and a lubrication path of the second oil pan and the lubricating portion. A second passage to be connected; a second pump that is provided in the second passage and that sends oil in the second oil pan to the lubrication path; and is provided in the first passage and the second passage; An oil pan structure comprising: a transmission means for transmitting heat of oil flowing through the first passage to oil flowing through the second passage.
2. The transmission means is a wall portion that is adjacent to or shares a part of each of the first passage and the second passage. The oil pan structure described.
3. The transmission means is a wall portion of at least a part of the second passage surrounded by at least a part of the first passage. The oil pan structure described.
4). The transmission means of the first passage is provided between the first passage, the connecting portion of the first oil pan, and the first pump, and the transmission means of the second passage is 2. The above-mentioned 2. provided between the connecting portion between the second passage and the second oil pan and the second pump. Or 3. The oil pan structure described.
5. 2. The transmission unit further includes a heat transfer fin extending from the wall. The oil pan structure of any one of thru | or 4.
6). The first passage further includes a bubble separator, and the bubble separator is provided between the first pump and a connection portion between the first passage and the second oil pan. The oil pan structure according to any one of 1 to 5.

According to this oil pan structure, heat exchange is possible between the oil that passes through the second passage and is supplied to the lubrication path, and the oil that passes through the first passage and is pumped to the second oil pan. Therefore, the oil that is used to heat the oil that passes through the second passage without being radiated by the second oil pan that is exposed to the outside air is supplied to the lubrication path. It can suppress that the viscosity of this raises. In addition, there is no need to install a new heater or the like for oil heating, and the structure is simple, so there is almost no deterioration in the oil heating performance, and oil with a stable viscosity can be supplied to the lubrication path over a long period of time. it can.
Also, the transfer of oil heat between the first passage and the second passage means that the oil collected and collected from the first oil pan is larger than the first oil pan having a wide bottom and hardly staying in the oil. Since a certain first passage can transmit heat without cooling, the transmission efficiency is better. Furthermore, rather than heating the oil in the second oil pan that is cooled by being exposed to the outside air, the oil in the second passage that is sent to the lubrication path of the lubrication unit is heated as it is after passing through the second pump. Since the heat can be transferred without being cooled, the efficiency of heat transfer is good.

When the transmission means is provided before the oil pump in each passage, it is easy to lengthen the section of the transmission means, and the efficiency of heat transfer can be improved.
When the transmission means is a wall portion adjacent to or shared by the first passage and the second passage, the structure of the transmission means can be made simpler, there is almost no deterioration in the heating performance of the oil, and it can be performed for a longer period of time. Oil with a stable viscosity can be supplied to the lubrication path. In addition, the structure of the oil pan can be simplified, obstacles such as oil clogging can be suppressed, and molding costs and assembly costs can be reduced.
When the transfer means is at least a wall portion of the second passage surrounded by at least a portion of the first passage, it is possible to secure a larger area of the wall portion that performs heat transfer, and the efficiency of heat transfer Can be improved.
When the heat transfer fin is provided, a larger contact area between the oil and the transfer means can be secured, and the efficiency of heat transfer can be improved.
In the case of further including a bubble separator, it is possible to reduce bubbles contained in the oil staying in the second oil pan and to prevent the bubbles from being sent to the second pump and the lubrication path.

Hereinafter, the oil pan structure of the present invention will be described in detail.
This oil pan structure is provided in a lubricating part 3 (not shown) such as an internal combustion engine as illustrated in FIG. 1, for example, and a first oil pan 11 that receives oil returned from a lubricating path of the lubricating part 3 The second oil pan 21 provided adjacent to the outer wall side of the first oil pan 11, the first passage 13 connecting the first oil pan 11 and the second oil pan 21, and the first passage 13. And the first pump 15 for sending the oil in the first oil pan 11 to the second oil pan 21, the second passage 23 connecting the second oil pan 21 and the lubrication path of the lubricating portion 3, and the second passage 23 and the second pump 25 for sending the oil in the second oil pan 21 to the lubrication path, the first passage 13 and the second passage 23, and the oil flowing through the first passage 13. Heat is circulated in the second passage 23. And transmission means 14, 24 for transmitting the yl, characterized in that it comprises a. The first passage 13 can further include a bubble separator 16.
The “lubricating part 3” is a lubricating part including a lubricating path that requires oil lubrication, and examples thereof include movable parts such as an internal combustion engine and a general machine.

The “first oil pan 11” and the “second oil pan 21” may be those commonly used regardless of their shapes and materials. Further, the “first pump 15” and the “second pump 25” may be those usually used regardless of their shapes and types.
The “first passage 13” is a passage used when the oil in the first oil pan 11 is sent to the second oil pan 21 by the first pump 15. The “second passage 23” is a passage used when the oil in the second oil pan 21 is sent to the lubrication path by the second pump 25. Furthermore, the 1st channel | path 13 and the 2nd channel | path 23 are provided with a transmission means.

The “transmitting means 14, 24” is a part that heats the oil flowing through the second passage 23 by transmitting the heat of the hot oil flowing through the first passage 13 to the oil flowing through the second passage 23. This transmission method is not particularly limited, and for example, the wall portions 4 of the first passage 13 and the second passage 23 are brought into contact with each other, or the material of the wall portion 4 is made thermally conductive as the common wall portion 4. be able to.
The form which makes the wall part 4 of the 1st channel | path 13 and the 2nd channel | path 23 contact or makes it common does not ask | require, but adjoins right and left (for example, refer FIGS. 1-3), and one channel | path adjoined up and down For example, it may be disposed so as to surround the other passage (see, for example, FIGS. 4 and 5). Moreover, when arrange | positioning so that one channel | path may surround the other channel | path, you may surround the other channel | path whole as a structure of a double pipe etc. (for example, refer FIG. 4 and 5), and one channel | path. The cross-sectional shape may be U-shaped, C-shaped, etc., and a part of the other passage may be surrounded (see, for example, FIGS. 6 and 7). Further, when one passage is disposed so as to surround the other passage, the first passage 13 is preferably disposed so as to surround the second passage 23. This is because heat can be prevented from being released from the second passage 23.

  Moreover, as the form which makes the 1st channel | path 13 and the 2nd channel | path 23 contact, as shown in FIGS. 1-3, you may arrange | position each channel | path 13, 23 so that each flow path may become parallel, The passages 13 and 23 may be arranged so as to have a crossing shape such as orthogonal. Furthermore, the first passage 13 and the second passage 23 of the transmission means meander to increase the heat exchangeable area of the transmission means, thereby improving the heat transfer efficiency. Moreover, when arrange | positioning each channel | paths 13 and 23 so that each flow path may become parallel, you may arrange | position so that each flow path may flow in a reverse direction so that it may illustrate in FIGS. However, they may be arranged to flow in the same direction. Among these, it is preferable to arrange it to flow in the opposite direction. The oil in the first passage 13 on the delivery destination 17 side, and the oil in the second passage 23 having a low temperature can be warmed by the oil in the first passage 13 having a low temperature as a result of heat exchange. In addition, since the heat is not exchanged on the side of the delivery source 12 of the first passage 13, the oil in the second passage 23, which has become hot as a result of the heat exchange, can be further warmed by the oil in the high-temperature first passage 13. . For this reason, it is because heat exchange can be performed more efficiently.

Moreover, the 1st channel | path 13 and the 2nd channel | path 23 can be connected using metal plates, such as copper, a heat pipe, etc. which are members with high heat conductivity, and can be set as a conduction part. Such a conductive part can be obtained in the same manner as the form in which the thermal conductivity is in direct contact with each other, and the first passage 13 and the second passage 23 can be arranged at any positions, and can be freely shaped according to the application. The oil pan structure can be obtained.
Further, for example, as shown in FIGS. 8 and 9, heat transfer fins can be provided from the wall portion which is the conductive portion toward the first passage 13 and / or the second passage 23. By providing such a heat transfer fin and securing a larger contact area between the oil and the transfer means, the efficiency of heat transfer can be improved. The material of the heat transfer fin is not particularly limited, and the same material as that of the wall portion may be used, or any material having a high thermal conductivity such as a metal and different from the wall portion may be used. Furthermore, the shape of the heat transfer fin can be any shape regardless of the shape.

The position where the transmission means is provided is not particularly limited, and is a connection portion between the first passage 13 and the second oil pan 21 from the first intake port 12 which is a connection portion between the first passage 13 and the first oil pan 11. It can be provided at any position between the discharge holes 17. Further, it can be provided at any position between the second intake port 22, which is a connection portion between the second passage 23 and the second oil pan 21, and the second passage 13 and the lubrication path. Among these, the first transmission means 14 of the first passage 13 is provided between the first intake port 12 and the first pump 15, and the second transmission means 24 of the second passage 23 is the second intake. It is preferably provided between the inlet 22 and the second pump 25. It is easy to lengthen the section of the transfer means, and the efficiency of heat transfer can be improved.
Furthermore, the position where the transmission means is provided is not limited to the above, and other parts can be brought into contact with each other. For example, bringing the first passage 13 that has passed through the bubble separator 16 described later into contact with the second passage 23 may conduct heat from oil that has been separated from the bubbles and is more easily contacted by the wall surface of the first passage 13. This is preferable because it is possible.

  The first passage 13 and the second passage 23 can be provided with arbitrary components. For example, a bubble separator 16 can be further provided between the first pump 15 and the connection portion 17 of the first passage 13 and the second oil pan 21. By providing the bubble separator, it is possible to reduce bubbles contained in the oil staying in the second oil pan, and to prevent the bubbles from being sent to the second pump and the lubrication path.

Hereinafter, the oil pan structure of the present invention will be described in detail with reference to the drawings.
1. Structure of Oil Pan Structure The oil pan structure of the first embodiment is provided at the bottom of the lubricating part 3 (not shown) as shown in FIG. 1, and the first oil pan 11 and the first oil pan 11 as shown in FIGS. 1 intake 12, first passage 13, first transmission means 14, first pump 15, bubble separator 16, discharge hole 17, second oil pan 21, second intake 22, second passage 23, second 2 includes a transmission means 24 and a second pump 25.
The first oil pan 11 is an oil pan that receives oil that returns from the lubrication target of the lubrication unit 3. The first intake port 12 is an opening provided at the bottom of the first oil pan 11 and connected to the first passage 13 via a strainer. The first passage 13 is an oil passage connected from the first intake port 12 of the first oil pan 11 to the discharge hole 17 of the second oil pan 21, from the first intake port 12 to the discharge hole 17. The first transmission means 14, the first pump 15, and the bubble separator 16 are provided between the two. The first pump 15 is a pump for pumping oil from the first oil pan 11 to the second oil pan 21. The bubble separator 16 is a separator that uses a cyclone to remove bubbles contained in the oil pressure-fed to the second oil pan 21.
The second oil pan 21 is an oil pan that receives the oil that has passed through the first passage 13. The second intake 22 is an opening provided at the bottom of the second oil pan 21 and connected to the second passage 23 via a strainer. The second passage 23 is an oil passage connected from the second intake port 22 of the second oil pan 21 to the lubrication path of the lubrication unit (not shown), and is between the second intake port 22 and the lubrication path. A second transmission means 24 and a second pump 25 are provided. The second pump 25 is a pump for pumping oil staying in the second oil pan 21 to the lubrication path of the lubrication unit 3.

  The 1st transmission means 14 and the 2nd transmission means 24 are the parts which arrange | positioned the 1st channel | path 13 and the 2nd channel | path 23 adjacently, and can perform heat exchange through the wall part 4 mutually adjacent | abutted. The material of the wall 4 is not particularly limited, and the same material as that of the first passage 13 and the second passage 23 and the first oil pan 11 and the second oil pan 21 is used. This is because the heat conductivity necessary for heat exchange is sufficiently secured because the wall portion 4 is thinned.

2. Oil Flow and Effect of Oil Pan Structure In the oil pan structure of this embodiment, oil circulates as shown in FIGS. Oil arriving at the first oil pan 11 from each lubrication path of the lubrication unit 3 is taken into the first passage 13 from the first intake port 12. The oil then passes through the first transmission means 14 to provide heat to the oil flowing through the second passage 23 via the second transmission means 24 delimited by the wall 4, and then the first pump side 15 and the bubble separation. It passes through the vessel 16 and is sent from the discharge hole 17 to the second oil pan 21.
The oil in the second oil pan 21 is taken into the second passage 23 from the second intake port 22. Thereafter, the oil passes through the second transmission means 24, receives heat from the oil flowing through the first passage 13, is heated, then passes through the second pump side 25 and is sent to the lubrication path of the lubrication section.

  Thus, according to the oil pan structure of the present embodiment, the heat of the hot oil flowing through the first passage 13 is transmitted to the oil flowing through the second passage 23 through the wall portion 4 and heated. Since the oil flowing through the second passage 23 stays in the second oil pan 21, heat is taken away by the outside air through the outer wall of the second oil pan 21, and the oil is heated by the second transmission means 24. It is possible to prevent the viscosity from rising due to warming.

3. An oil pan structure in which the transmission means of the second passage is entirely surrounded by the first passage. Alternatively, an oil pan structure in which the transmission means of the second passage is entirely surrounded by the first passage can be adopted. As shown in FIGS. 4 and 5, the oil pan structure of the second embodiment has a double pipe structure in which the first transmission means 14 and the second transmission means 24 of the first passage 13 and the second passage 23 are the same. Other than that, the configuration is the same as in the first embodiment. Further, in this double tube structure, the outer side is the first passage 13 and the inner side is the second passage 23, and heat is exchanged by the boundary wall 4.
In the oil pan structure of the second embodiment, as in the oil pan structure of the first embodiment, the oil flowing through the second passage 23 has the same temperature as the oil flowing through the first passage 13 and suppresses an increase in viscosity. be able to. Moreover, the wall part 4 of Example 2 can enlarge the area which contacts oil more than the wall part 4 of Example 1 per channel | path length, raises the efficiency of heat transfer more, and makes 2nd channel | path 23. The flowing oil can be raised until it reaches a temperature similar to that of the oil flowing through the first passage 13.

4). An oil pan structure in which the transmission means of the second passage is partially surrounded by the first passage Further, an oil pan structure in which the transmission means of the second passage is partially surrounded by the first passage can be adopted. As shown in FIGS. 6 and 7, the oil pan structure of the third embodiment is such that the first transmission means 14 and the second transmission means 24 of the first passage 13 and the second passage 23 are double U-shaped tubes. Except for the structure, the configuration is the same as that of the second embodiment. Further, in this double U-shaped tube structure, the outer U-shaped tube is the first passage 13 and the inner U-shaped tube is the second passage 23, and heat is exchanged by the boundary wall 4. .
In the oil pan structure of the third embodiment, similarly to the oil pan structure of the second embodiment, the oil flowing through the second passage 23 has the same temperature as the oil flowing through the first passage 13 and suppresses an increase in viscosity. be able to. Further, the U-shaped tube of the third embodiment can easily secure the flow rate of the oil flowing through the passages 13 and 23 even if the height is lower than the double tube structure of the second embodiment.

5. Oil pan structure provided with heat transfer fins An oil pan structure provided with heat transfer fins can also be used. As shown in FIGS. 8 and 9, the oil pan structure of Example 2 has the same configuration as that of Example 1 except that three heat transfer fins 41 are provided in parallel on the wall 4. It has become. The heat transfer fins 41 are made of the same material as the wall portion 4 and are plate-like objects having the same length as the first transfer means 14 and the second transfer means 24.
In the oil pan structure of the second embodiment, as in the oil pan structure of the first embodiment, the oil flowing through the second passage 23 has the same temperature as the oil flowing through the first passage 13 and suppresses an increase in viscosity. be able to. In addition, the heat transfer fins 41 of the second embodiment can increase the area in contact with oil more than the first transfer means 14 and the second transfer means 24 of the first embodiment, and can further increase the efficiency of heat transfer, The oil flowing through the second passage 23 can be raised until it reaches a temperature similar to that of the oil flowing through the first passage 13.

It is a schematic cross section for demonstrating the structure of the oil pan structure of a present Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of a present Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of a present Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example. It is a schematic cross section for demonstrating the structure of the oil pan structure of another Example.

Explanation of symbols

11; 1st oil pan, 12; 1st intake port, 13; 1st passage, 14; 1st transmission means, 15; 1st pump, 16; Bubble separator, 17;
21; 2nd oil pan, 22; 2nd intake port, 23; 2nd passage, 24; 2nd transmission means, 25; 2nd pump,
3; Lubrication part, 4; Wall part, 41; Heat transfer fin.

Claims (6)

A first oil pan that receives oil delivered from the lubrication section;
A second oil pan provided adjacent to the outer wall side of the first oil pan;
A first passage connecting the first oil pan and the second oil pan;
A first pump provided in the first passage and for sending oil in the first oil pan to the second oil pan;
A second passage connecting the second oil pan and the lubricating path of the lubricating portion;
A second pump provided in the second passage and for sending oil in the second oil pan to the lubrication path;
Transmission means provided in the first passage and the second passage, and transmitting heat of the oil flowing through the first passage to the oil flowing through the second passage. Oil pan structure.   2. The oil pan structure according to claim 1, wherein the transmission means is a wall portion adjacent to or sharing a part of each of the first passage and the second passage.   2. The oil pan structure according to claim 1, wherein the transmission means is a wall portion of at least a part of the second passage surrounded by at least a part of the first passage. The transmission means of the first passage is provided between a connection portion between the first passage and the first oil pan, and the first pump.
The oil pan structure according to claim 2 or 3, wherein the transmission means of the second passage is provided between a connection portion between the second passage and the second oil pan and the second pump.   The oil pan structure according to any one of claims 2 to 4, wherein the transmission means further includes a heat transfer fin extending from the wall portion.   The said 1st channel | path further comprises a bubble separator, and this bubble separator is provided between the said 1st pump and the connection part of this 1st channel | path and the said 2nd oil pan. The oil pan structure according to any one of 5.

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