Upper transmission case of multifunctional integrated diesel engine

Abstract

The multifunctional integrated diesel engine upper transmission case is provided with a plurality of cavities, and every two adjacent cavities share the same wall thickness and do not need a gap; the cavities are communicated with one another to form a high-temperature water path for flowing out of the engine body, a low-temperature water path for entering the engine body, a high-temperature engine oil path for flowing out of the engine body, a low-temperature engine oil path for entering the engine body, an engine oil heat exchanger low-temperature circulating water path and an engine oil heat exchanger high-temperature circulating water path. According to the multifunctional integrated diesel engine upper transmission case, the engine body casting quality is improved by simplifying the engine body cooling and lubricating pipeline structure; the supporting frame bearing function of an engine oil heat exchanger, a sea and fresh water radiator and a self-cleaning filter is replaced with the high rigidity function of a transmission box on the multifunctional integrated diesel engine. And meanwhile, the external cooling and heat dissipation cost is reduced by utilizing temperature difference heat exchange of adjacent fluids, and two adjacent cavities share the same wall thickness to replace a pipeline, so that the size of an engine assembly is saved.

Description

Technical Field

[0001] The invention belongs to the technical field of internal combustion engines, and particularly relates to a multi-functional integrated upper transmission case for a diesel engine. Background Art

[0002] Generally, the structure of a diesel engine uses water for cooling parts and engine oil for lubricating parts. Its cooling water circuit and lubricating oil circuit are channels for realizing the cooling and lubrication of the whole machine to ensure the normal operation of the whole machine. If the water circuit and oil circuit connected to the heat exchanger on the engine block are integrated on the engine block, it will make the structure of the engine block too complex and the casting difficulty too great. For an engine block with a complex structure, it cannot be realized, and the yield of the engine block is low; while the sea-fresh water heat exchanger, engine oil heat exchanger and self-cleaning filter are heavy and need to be supported by a separate support frame, and the existence of the support frame brings the problem of increasing the volume of the whole machine. Summary of the Invention

[0003] In view of this, the present invention aims to provide a multi-functional integrated upper transmission case for a diesel engine to solve the problem that the sea-fresh water heat exchanger, engine oil heat exchanger and self-cleaning filter are heavy and need to be supported by a separate support frame, resulting in an increase in the volume of the whole machine.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows: A multi-functional integrated upper transmission case for a diesel engine is provided with a number of cavities. Two adjacent cavities share the same wall thickness and there is no need for a gap. A number of cavities are interconnected to form a high-temperature water circuit flowing out of the engine block, a low-temperature water circuit entering the engine block, a high-temperature engine oil circuit flowing out of the engine block, a low-temperature engine oil circuit entering the engine block, a low-temperature circulation water circuit of the engine oil heat exchanger and a high-temperature circulation water circuit of the engine oil heat exchanger.

[0005] Further, it is provided with a first cavity A, a second cavity B, a third cavity C, a fourth cavity D, a fifth cavity E, a sixth cavity F, a seventh cavity G and an eighth cavity H. Two adjacent cavities share the same wall thickness and there is no need for a gap between adjacent pipelines. The high-temperature oil flowing out of the engine block enters the third cavity C and then exchanges heat with the low-temperature oil in the fourth cavity D in sequence, exchanges heat with the low-temperature water in the cavity A2 and cavity A3, and exchanges heat with the high-temperature water flowing out of the engine block in the cavity B1 and cavity B2; since the temperature in the third cavity C is higher than that in the first cavity A, the second cavity B and the fourth cavity D, the high-temperature oil flowing out of the engine block is preliminarily cooled; after the high-temperature water flowing out of the engine block enters the cavity B1 and cavity B2, the high-temperature water in the cavity B1 exchanges heat with the low-temperature oil in the fourth cavity D in sequence and exchanges heat with the low-temperature water in the cavity A2; the high-temperature water in the cavity B2 exchanges heat with the low-temperature circulating water in the seventh cavity G in sequence and exchanges heat with the high-temperature circulating water in the eighth cavity H; since the temperature in the cavity B1 and cavity B2 is higher than that in the fourth cavity D, the cavity A2, the seventh cavity G and the eighth cavity H, the high-temperature water flowing out of the engine block is preliminarily cooled.

[0006] Further, the first cavity A is composed of interconnected cavities A1, A2, and A3. A first low-temperature water outlet hole is provided on cavity A1, a second low-temperature water outlet hole is provided on cavity A2, and a low-temperature water inlet hole and a spare low-temperature water inlet hole are provided on cavity A3. The low-temperature water cooled by the seawater and fresh water radiator outside the machine body enters the first cavity A through the low-temperature water inlet hole, and exits from the first low-temperature water outlet hole and the second low-temperature water outlet hole and enters the machine body.

[0007] Further, the second cavity B is composed of interconnected cavities B1 and B2. A first high-temperature water inlet hole is provided on cavity B1, and a second high-temperature water inlet hole and a high-temperature water outlet hole are provided on cavity B2. The high-temperature water flowing out after cooling the machine body enters the second cavity B through the first high-temperature water inlet hole and the second high-temperature water inlet hole, exits from the high-temperature water outlet hole, exchanges heat with the seawater and fresh water radiator outside the machine body to become low-temperature water, enters the first cavity A and then enters the machine body.

[0008] Further, a high-temperature oil inlet hole and a high-temperature oil outlet hole are provided on the third cavity C; the high-temperature oil flowing out of the machine body enters the third cavity C through the high-temperature oil inlet hole, and after flowing out from the high-temperature oil outlet hole, exchanges heat with the engine oil heat exchanger outside the machine body to become low-temperature oil.

[0009] Further, a low-temperature oil outlet hole and a low-temperature oil inlet hole are provided on the fourth cavity D; the low-temperature oil enters the fourth cavity D through the low-temperature oil inlet hole and flows out from the low-temperature oil outlet hole and is filtered by the self-cleaning filter.

[0010] Further, a first clean oil outlet hole, a second clean oil outlet hole, and a clean oil inlet hole are provided on the fifth cavity E; the low-temperature clean oil enters the fifth cavity E through the clean oil inlet hole, and flows out through the first clean oil outlet hole and the second clean oil outlet hole. It flows out from the first clean oil outlet hole and enters the machine body, and flows out from the second clean oil outlet hole and enters the transmission case.

[0011] Further, an impurity oil inlet hole and an impurity oil outlet hole are provided on the sixth cavity F; the low-temperature impurity oil enters the sixth cavity F through the impurity oil inlet hole and flows out through the impurity oil outlet hole to provide lubrication for the transmission gears.

[0012] Further, a low-temperature circulating water outlet hole and a low-temperature circulating water inlet hole are provided on the seventh cavity G; the low-temperature circulating water cooled by the seawater and fresh water radiator outside the machine body enters the seventh cavity G through the low-temperature circulating water inlet hole and then flows out from the low-temperature circulating water outlet hole, and exchanges heat with the engine oil heat exchanger outside the machine body to become high-temperature circulating water.

[0013] Furthermore, a high-temperature circulating water outlet hole and a high-temperature circulating water inlet hole are provided on the eighth cavity H; the high-temperature circulating water enters the eighth cavity H from the high-temperature circulating water inlet hole; and flows out from the high-temperature circulating water outlet hole, and exchanges heat with the seawater and fresh water radiator outside the machine body to become low-temperature circulating water.

[0014] Compared with the prior art, the upper transmission box of the multi-functional integrated diesel engine of the present invention has the following advantages: (1) For the upper transmission box of the multi-functional integrated diesel engine of the present invention, the structure of the body cooling and lubrication pipelines is simplified to improve the casting quality of the body; the high-rigidity function of the upper transmission box of the multi-functional integrated diesel engine is used to replace the supporting functions of the oil heat exchanger, the seawater and fresh water radiator, and the self-cleaning filter; at the same time, the heat exchange between adjacent fluid temperatures is used to reduce the external cooling and heat dissipation costs, and the common wall thickness of adjacent two cavities is used instead of pipelines to save the volume of the engine assembly.

[0015] (2) For the upper transmission box of the multi-functional integrated diesel engine of the present invention, the casting yield of the body is improved, the production cost of the body is reduced, the volume of the whole machine is reduced, and the heat exchange in multiple dimensions by temperature difference is used to improve the cooling and lubrication benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the working principle of the upper transmission box of the multi-functional integrated diesel engine according to an embodiment of the present invention; Figure 2 is a schematic diagram of the upper transmission box of the multi-functional integrated diesel engine according to an embodiment of the present invention Figure 1 ; Figure 3 is a schematic diagram of the upper transmission box of the multi-functional integrated diesel engine according to an embodiment of the present invention Figure 2 ; Figure 4 is a schematic diagram of the bearing function of the upper transmission box of the multi-functional integrated diesel engine according to an embodiment of the present invention.

[0017] Description of the reference numerals: 1 - No. 1 high-temperature water inlet hole; 2 - No. 2 high-temperature water inlet hole; 3 - No. 1 clean oil outlet hole; 4 - No. 1 low-temperature water outlet hole; 5 - No. 2 low-temperature water outlet hole; 6 - low-temperature water inlet hole; 7 - No. 2 clean oil outlet hole; 8 - high-temperature oil inlet hole; 9 - high-temperature circulating water outlet hole; 10 - low-temperature water standby inlet hole; 11 - low-temperature oil outlet hole; 12 - clean oil inlet hole; 13 - impurity oil inlet hole; 14 - high-temperature oil outlet hole; 15 - low-temperature oil inlet hole; 16 - low-temperature circulating water outlet hole; 17 - high-temperature circulating water inlet hole; 18 - low-temperature circulating water inlet hole; 19 - high-temperature water outlet hole; 20 - impurity oil outlet hole. Detailed implementation mode

[0018] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0021] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0022] The body is cooled by water, with low-temperature water entering the body and high-temperature water leaving the body; the body is lubricated with engine oil, with low-temperature oil entering the body and high-temperature oil leaving the body; the engine oil heat exchanger is cooled by water, with low-temperature circulating water entering the engine oil heat exchanger and high-temperature circulating water leaving the engine oil heat exchanger.

[0023] A multi-functional integrated upper transmission case for a diesel engine, as Figures 1 to 4 shown, is provided with a number of cavities. Two adjacent cavities share the same wall thickness and there is no need for a gap. The a number of cavities are interconnected to form a high-temperature water path for the outflow from the engine block, a low-temperature water path for entering the engine block, a high-temperature engine oil path for the outflow from the engine block, a low-temperature engine oil path for entering the engine block, a low-temperature circulating water path for the engine oil heat exchanger, and a high-temperature circulating water path for the engine oil heat exchanger.

[0024] Specifically, a multi-functional integrated upper transmission case for a diesel engine is provided with a first cavity A, a second cavity B, a third cavity C, a fourth cavity D, a fifth cavity E, a sixth cavity F, a seventh cavity G, and an eighth cavity H. Two adjacent cavities share the same wall thickness and there is no need for a gap between adjacent pipelines. The high-temperature oil flowing out of the engine block enters the third cavity C and then exchanges heat with the low-temperature oil in the fourth cavity D, exchanges heat with the low-temperature water in the cavity A2 and the cavity A3, and exchanges heat with the high-temperature water flowing out of the engine block in the cavity B1 and the cavity B2. Since the temperature in the third cavity C is higher than the temperatures in the first cavity A, the second cavity B, and the fourth cavity D, the high-temperature oil flowing out of the engine block is initially cooled. After the high-temperature water flowing out of the engine block enters the cavity B1 and the cavity B2, the high-temperature water in the cavity B1 exchanges heat with the low-temperature oil in the fourth cavity D and exchanges heat with the low-temperature water in the cavity A2 in sequence. The high-temperature water in the cavity B2 exchanges heat with the low-temperature circulating water in the seventh cavity G and exchanges heat with the high-temperature circulating water in the eighth cavity H in sequence. Since the temperatures in the cavity B1 and the cavity B2 are higher than the temperatures in the fourth cavity D, the cavity A2, the seventh cavity G, and the eighth cavity H, the high-temperature water flowing out of the engine block is initially cooled.

[0025] In the multi-functional integrated upper transmission case of the present application, cavities are used to replace the pipeline structure. Two adjacent cavities share the same wall thickness and there is no need for a gap between adjacent pipelines. The integrated upper transmission case structure can reduce the total volume of the pipelines necessary for cooling and lubrication, and greatly reduce the overall size of the engine. The water paths and oil paths for entering and leaving the engine block are integrated, and the original pipelines are simplified into cavities to form reinforcing ribs, so that the rigidity and strength are significantly increased. At the same time, high-strength materials are selected to greatly enhance the load-bearing capacity of the upper transmission case, which can replace the load-bearing functions of the supports for the engine oil heat exchanger, the sea fresh water radiator, and the self-cleaning filter.

[0026] The first cavity A is composed of interconnected cavities A1, A2, and A3. A first low-temperature water outlet hole 4 is provided on the cavity A1, a second low-temperature water outlet hole 5 is provided on the cavity A2, and a low-temperature water inlet hole 6 and a low-temperature water standby inlet hole 10 are provided on the cavity A3. The low-temperature water cooled by the sea fresh water radiator outside the engine block enters the first cavity A through the low-temperature water inlet hole 6 and exits the engine block through the first low-temperature water outlet hole 4 and the second low-temperature water outlet hole 5.

[0027] The second cavity B is composed of a mutually connected cavity B1 and cavity B2. There is a first high-temperature water inlet hole 1 on cavity B1, and a second high-temperature water inlet hole 2 and a high-temperature water outlet hole 19 on cavity B2. The high-temperature water flowing out after cooling the machine body enters the second cavity B through the first high-temperature water inlet hole 1 and the second high-temperature water inlet hole 2, and exits from the high-temperature water outlet hole 19, exchanges heat with the seawater-freshwater radiator outside the machine body to become low-temperature water, enters the first cavity A and then enters the machine body.

[0028] There is a high-temperature oil inlet hole 8 and a high-temperature oil outlet hole 14 on the third cavity C; the high-temperature oil flowing out from the machine body enters the third cavity C through the high-temperature oil inlet hole 8, and after flowing out from the high-temperature oil outlet hole 14, exchanges heat with the engine oil heat exchanger outside the machine body to become low-temperature oil, and enters the fourth cavity D from the low-temperature oil inlet hole 15.

[0029] There is a low-temperature oil outlet hole 11 and a low-temperature oil inlet hole 15 on the fourth cavity D; the low-temperature oil enters the fourth cavity D from the low-temperature oil inlet hole 15, and after flowing out from the low-temperature oil outlet hole 11 and being filtered by the self-cleaning filter, the clean oil enters the fifth cavity E through the clean oil inlet hole 12, and the impurity oil enters the sixth cavity F through the impurity oil inlet hole 13.

[0030] There is a first clean oil outlet hole 3, a second clean oil outlet hole 7 and a clean oil inlet hole 12 on the fifth cavity E; the low-temperature clean oil enters the fifth cavity E through the clean oil inlet hole 12, and flows out through the first clean oil outlet hole 3 and the second clean oil outlet hole 7. It flows out from the first clean oil outlet hole 3 and enters the machine body, and flows out from the second clean oil outlet hole 7 and enters the transmission case.

[0031] There is an impurity oil inlet hole 13 and an impurity oil outlet hole 20 on the sixth cavity F; the low-temperature impurity oil enters the sixth cavity F through the impurity oil inlet hole 13, and flows out through the impurity oil outlet hole 20 to provide lubrication for the transmission gears.

[0032] There is a low-temperature circulating water outlet hole 16 and a low-temperature circulating water inlet hole 18 on the seventh cavity G; the low-temperature circulating water cooled by the seawater-freshwater radiator outside the machine body enters the seventh cavity G from the low-temperature circulating water inlet hole 18 and then flows out from the low-temperature circulating water outlet hole 16, and exchanges heat with the engine oil heat exchanger outside the machine body to become high-temperature circulating water.

[0033] There is a high-temperature circulating water outlet hole 9 and a high-temperature circulating water inlet hole 17 on the eighth cavity H; the high-temperature circulating water enters the eighth cavity H from the high-temperature circulating water inlet hole 17; it flows out from the high-temperature circulating water outlet hole 9, exchanges heat with the seawater-freshwater radiator outside the machine body to become low-temperature circulating water, and enters the seventh cavity G from the low-temperature circulating water inlet hole 18.

[0034] The working principle of a multi-functional integrated transmission case on a diesel engine is as follows: Oil circuit: After the lubrication of the machine body, all the high-temperature engine oil enters the oil sump. The oil discharged from the oil sump enters the integrated upper transmission box through the transmission box from the high-temperature oil inlet hole 8, flows out from the high-temperature oil outlet hole 14, enters the integrated upper transmission box from the low-temperature oil inlet hole 15 after being cooled by the engine oil heat exchanger, flows out from the low-temperature oil outlet hole 11, and enters the integrated upper transmission box from the clean oil inlet hole 12 and the impurity oil inlet hole 13 after being filtered by the self-cleaning filter. Among them, the clean oil entering from the clean oil inlet hole 12 flows out from the No. 1 clean oil outlet hole 3 and the No. 2 clean oil outlet hole 7. The clean oil flowing out from the No. 1 clean oil outlet hole 3 enters the machine body, and the clean oil flowing out from the No. 2 clean oil outlet hole 7 enters the transmission box. The impurity oil entering from the impurity oil inlet hole 13 flows out from the impurity oil outlet hole 20 to provide lubrication for the transmission gears.

[0035] Water circuit for cooling the machine body: The low-temperature water cooled by the sea and fresh water radiator enters the integrated upper transmission box from the low-temperature water inlet hole 6 (the low-temperature water standby inlet hole 10 serves as the standby hole for the low-temperature water inlet hole 6), flows out from the No. 1 low-temperature water outlet hole 4 and the No. 2 low-temperature water outlet hole 5 and enters the machine body. The high-temperature water returned from the machine body enters the integrated upper transmission box from the No. 1 high-temperature water inlet hole 1 and the No. 2 high-temperature water inlet hole 2, flows out from the high-temperature water outlet hole 19 and enters the temperature regulating valve box, and then becomes low-temperature water after being cooled by the sea and fresh water radiator, and enters the integrated upper transmission box from the low-temperature water inlet hole 6 to form a closed cycle.

[0036] Water circuit for cooling the engine oil heat exchanger: The low-temperature circulating water cooled by the sea and fresh water radiator enters the integrated upper transmission box from the low-temperature circulating water inlet hole 18, flows out from the low-temperature circulating water outlet hole 16, exchanges heat through the engine oil heat exchanger and becomes high-temperature circulating water, enters the integrated upper transmission box from the high-temperature circulating water inlet hole 17, flows out from the high-temperature circulating water outlet hole 9, exchanges heat through the sea and fresh water radiator and becomes low-temperature circulating water, and enters the integrated upper transmission box from the low-temperature circulating water inlet hole 18 to form a closed cycle.

[0037] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional integrated diesel engine upper transmission case, characterized in that: There are several cavities. Two adjacent cavities share the same wall thickness and there is no need for a gap. The several cavities are interconnected to form a high-temperature water path for the outflow of the machine body, a low-temperature water path for the inflow into the machine body, a high-temperature engine oil path for the outflow of the machine body, a low-temperature engine oil path for the inflow into the machine body, a low-temperature circulating water path of the engine oil heat exchanger, and a high-temperature circulating water path of the engine oil heat exchanger.

2. The multifunctional integrated diesel engine upper transmission case according to claim 1, characterized in that: There are cavity A of No. 1, cavity B of No. 2, cavity C of No. 3, cavity D of No. 4, cavity E of No. 5, cavity F of No. 6, cavity G of No. 7, and cavity H of No.

8. Two adjacent cavities share the same wall thickness and there is no need for a gap between adjacent pipelines. The high-temperature oil flowing out of the machine body enters cavity C of No. 3 and then exchanges heat with the low-temperature oil in cavity D of No. 4 in sequence, exchanges heat with the low-temperature water in cavity A2 and cavity A3, and exchanges heat with the high-temperature water flowing out of the machine body in cavity B1 and cavity B2; since the temperature in cavity C of No. 3 is higher than the temperatures of cavity A of No. 1, cavity B of No. 2, and cavity D of No. 4, the high-temperature oil flowing out of the machine body is initially cooled; after the high-temperature water flowing out of the machine body enters cavity B1 and cavity B2, the high-temperature water in cavity B1 exchanges heat with the low-temperature oil in cavity D of No. 4 in sequence, and exchanges heat with the low-temperature water in cavity A2; the high-temperature water in cavity B2 exchanges heat with the low-temperature circulating water in cavity G of No. 7 in sequence, and exchanges heat with the high-temperature circulating water in cavity H of No. 8; since the temperatures in cavity B1 and cavity B2 are higher than the temperatures of cavity D of No. 4, cavity A2, cavity G of No. 7, and cavity H of No. 8, the high-temperature water flowing out of the machine body is initially cooled.

3. The multifunctional integrated diesel engine upper transmission case according to claim 2, characterized in that: Cavity A of No. 1 is composed of interconnected cavity A1, cavity A2, and cavity A3. There is a first low-temperature water outlet hole on cavity A1, a second low-temperature water outlet hole on cavity A2, and a low-temperature water inlet hole and a spare low-temperature water inlet hole on cavity A3. The low-temperature water cooled by the seawater fresh water radiator outside the machine body enters cavity A of No. 1 through the low-temperature water inlet hole and exits from the first low-temperature water outlet hole and the second low-temperature water outlet hole and enters the machine body.

4. A multi-functional integrated diesel engine upper transmission case according to claim 2, characterized in that: Cavity B of No. 2 is composed of interconnected cavity B1 and cavity B2. There is a first high-temperature water inlet hole on cavity B1, and a second high-temperature water inlet hole and a high-temperature water outlet hole on cavity B2. The high-temperature water flowing out after cooling the machine body enters cavity B of No. 2 through the first high-temperature water inlet hole and the second high-temperature water inlet hole, exits from the high-temperature water outlet hole, exchanges heat with the seawater fresh water radiator outside the machine body to become low-temperature water, enters cavity A of No. 1 and then enters the machine body.

5. A multifunctional integrated diesel engine upper transmission case according to claim 2, characterized in that: There is a high-temperature oil inlet hole and a high-temperature oil outlet hole on cavity C of No. 3; the high-temperature oil flowing out of the machine body enters cavity C of No. 3 through the high-temperature oil inlet hole and flows out from the high-temperature oil outlet hole and exchanges heat with the engine oil heat exchanger outside the machine body to become low-temperature oil.

6. A multi-functional integrated diesel engine upper transmission case according to claim 2, characterized in that: There is a low-temperature oil outlet hole and a low-temperature oil inlet hole on cavity D of No. 4; the low-temperature oil enters cavity D of No. 4 through the low-temperature oil inlet hole and flows out from the low-temperature oil outlet hole and is filtered by the self-cleaning filter.

7. A multi-functional integrated diesel engine upper transmission case according to claim 2, characterized in that: There is a first clean oil outlet hole, a second clean oil outlet hole, and a clean oil inlet hole on cavity E of No. 5; the low-temperature clean oil enters cavity E of No. 5 through the clean oil inlet hole, flows out through the first clean oil outlet hole and the second clean oil outlet hole, flows out from the first clean oil outlet hole and enters the machine body, and flows out from the second clean oil outlet hole and enters the transmission case.

8. A multi-functional integrated diesel engine upper transmission case according to claim 2, characterized in that: The sixth cavity F is provided with an impurity oil inlet hole and an impurity oil outlet hole; the low-temperature impurity oil enters the sixth cavity F through the impurity oil inlet hole and flows out through the impurity oil outlet hole to provide lubrication for the transmission gear.

9. A multifunctional integrated diesel engine upper transmission case according to claim 2, characterized in that: The seventh cavity G is provided with a low-temperature circulating water outlet hole and a low-temperature circulating water inlet hole; the low-temperature circulating water cooled by the seawater fresh water radiator outside the machine body enters the seventh cavity G from the low-temperature circulating water inlet hole and flows out from the low-temperature circulating water outlet hole, and exchanges heat with the engine oil heat exchanger outside the machine body to become high-temperature circulating water.

10. A multifunctional integrated diesel engine upper transmission case according to claim 2, characterized in that: The eighth cavity H is provided with a high-temperature circulating water outlet hole and a high-temperature circulating water inlet hole; the high-temperature circulating water enters the eighth cavity H from the high-temperature circulating water inlet hole; it flows out from the high-temperature circulating water outlet hole and exchanges heat with the seawater fresh water radiator outside the machine body to become low-temperature circulating water.

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