CN218882363U - V-shaped diesel engine body structure - Google Patents

Abstract

The utility model discloses a V type diesel engine organism structure, which comprises a bod, be equipped with two at least camshaft holes on the organism, a main oil duct that provides lubricating oil for camshaft hole inner cam axle, two water diversion channels and two water collection channels, two water collection channels respectively with the delivery port switch-on of organism front end, camshaft hole both sides are equipped with the camshaft room respectively on the organism, the camshaft room flies to splash oil and oil gas entry and cylinder jacket lower part cooling chamber switch-on through the camshaft room, cylinder jacket lower part cooling chamber is through splashing oil return breach and crankcase cavity switch-on, camshaft room and crankcase cavity switch-on. The structure of the utility model is divided into an upper part and a lower part for cooling, and the upper part is cooled by cooling liquid; because heat load is less under the cylinder liner, consequently the utility model discloses a structure uses non-forced cooling, rotates through camshaft bearing and the oil that splashes and oil gas carry out a small amount of cooling to the cylinder liner lower part, plays appropriate benefit, has avoided excessive cooling to cause the engine heat loss.

Description

V-shaped diesel engine body structure

Technical Field

The utility model relates to an engine spare part especially relates to a V type diesel engine organism structure, belongs to diesel engine technical field.

Background

In the field of diesel engines, a machine body is a framework of an engine, and the structural form of the machine body has great influence on various aspects of the diesel engine. The gantry type machine body structure is mature in application, simple in manufacturing process and wide in application range. The V-shaped diesel engine body structure mainly comprises an engine body, a main bearing cap bolt (or a bolt and a nut), a transverse pull bolt and the like.

For a V-shaped diesel engine, two rows of cylinder structures are designed, a shared structure and an integrated structure are preferentially considered in the design and development process, the number of parts is reduced, the sealing surface and the leakage risk are reduced, meanwhile, the rigidity of the engine body can be increased, and the purposes of reducing deformation and ensuring the processing precision are achieved. Two rows of cylinders of the V-type engine are provided with respective cooling systems. At present, a new concept of 'zone cooling' exists in the industry, different cooling modes are adopted in zones according to different characteristics of cooling parts, the cooling efficiency is improved, and the high heat efficiency of an engine is improved.

At present, for a V-type heavy engine, a cylinder sleeve is composed of the following two structures: 1) Two-stage overhead: an upper support shoulder, an upper positioning hole and a lower positioning hole (O-shaped ring sealing); 2) Overhead three-section type: the upper supporting shoulder, the upper positioning hole, the middle mounting hole (sealed by an O-shaped ring) and the lower mounting hole (sealed by an O-shaped ring).

At present, an overhead two-section type cooling structure is mainly applied to a cooling water jacket structure of a cylinder jacket of a traditional heavy engine and is cooled by cooling liquid. As shown in a schematic cooling diagram of a cylinder sleeve of a conventional 6-cylinder in-line engine shown in FIG. 1, a water inlet behind a water diversion channel is used for feeding water from the bottom of the cylinder sleeve, the water flows into the cylinder cover from the top of a machine body after cooling the cylinder sleeve, and the cylinder sleeve is cooled in different heat load areas without difference. Organism apopore a is general more than 4, and the structure is complicated, simultaneously because the cooling cylinder cap demand, every hole aperture size of going up differs, causes the water flow distribution inequality of cylinder liner water jacket, and then the cooling cylinder liner is inhomogeneous, influences performances such as cylinder liner deformation and engine air leakage and machine oil consumption. In fig. 1, b is a cylinder sleeve mounting hole 1, c is a machine body water diversion channel, d is a machine body water diversion hole (water enters the bottom of a cylinder sleeve), and e is a cylinder sleeve mounting hole 2 (a sealing ring).

For the overhead three-section type, the structure is divided into two types, the upper part of the structure is cooled by cooling liquid, and the lower part of the structure is cooled by cooling liquid or pressure lubricating oil. The cylinder sleeve parts with the two structures adopt forced cooling, the structure is complex, the sealing requirement is high, meanwhile, because the thermal load of the lower part of the cylinder sleeve is small, the forced cooling can cause the heat loss of the engine, but if the cylinder sleeve is not cooled, the cylinder sleeve can be caused to be locally overheated to the heavy engine, and then the cylinder of the engine is pulled. As shown in fig. 13, in a conventional cooling schematic diagram of a V-shaped engine cylinder liner, an upper cooling water jacket and a lower cooling water jacket are both forcibly cooled by coolant, and the distribution of the coolant is controlled by the sizes of an inlet and an outlet of the coolant, which results in excessive cooling of the lower portion of the cylinder liner. In fig. 13, f is a water collecting pipe and g is an upper water jacket; h is a water diversion pipe; i is a first seal ring; j is a lower water jacket; k is a second seal ring.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: how to simplify the structure of the engine and avoid the problem of excessive cooling of the lower cylinder liner portion.

In order to solve the technical problem, the technical scheme of the utility model is to provide a V type diesel engine organism structure, a serial communication port, which comprises an engine body, the both sides at organism top are equipped with two rows of cylinder liner mounting holes that correspond with two rows of cylinders respectively, be equipped with at least two camshaft holes on the organism, a main oil duct that provides lubricating oil for camshaft in the camshaft hole, two water diversion canals and two water collection canals, two water collection canals are connected with the delivery port of organism front end respectively, a cylinder liner is all equipped with in each cylinder liner mounting hole, be equipped with cylinder jacket upper portion cooling chamber and cylinder liner lower part cooling chamber that separate each other between cylinder liner mounting hole inner wall and the cylinder liner outer wall, every cylinder position correspondence on the organism is equipped with a water diversion hole and a water inlet hole, the one end of all water diversion holes and the one end of water inlet hole all are located on the organism top surface, the organism top surface still is equipped with two water inlets, two water inlets are connected with two water diversion canals in the organism respectively, every water diversion hole other end all is connected with water diversion canal, every water diversion hole other end is connected with an upper portion cooling chamber rather than corresponding, every water inlet hole passes through the cylinder liner corresponding cylinder jacket position and is close to this upper portion cooling chamber; the camshaft chamber is used for collecting lubricating oil that the camshaft rotates and splashes out is equipped with respectively to camshaft hole both sides on the organism, and the camshaft chamber flies to splash oil and oil gas entry and cylinder jacket lower part cooling chamber switch-on through the camshaft chamber, and cylinder jacket lower part cooling chamber is through splashing oil return breach and crankcase cavity switch-on, camshaft chamber and crankcase cavity switch-on.

Preferably, a cam bush is arranged in the cam shaft hole, a cam shaft is arranged in the cam bush, a hole communicated with the main oil duct is formed in one side, close to the main oil duct, of the cam bush, and a hole communicated with the cam shaft chamber is formed in one side, close to the cam shaft chamber, of the cam bush; the positions of the splashed oil and oil gas inlets of the camshaft chamber are opposite to the hole on one side, close to the camshaft chamber, of the cam bush.

Preferably, the size of the splash oil return gap is smaller than that of the splash oil and oil gas inlet of the camshaft chamber.

Preferably, the cylinder sleeve upper portion cooling chamber only has a water inlet and a return water hole, and the water inlet and the return water hole are located the opposite both sides of cylinder sleeve upper portion cooling chamber respectively.

Preferably, the positions of the water diversion hole and the water inlet hole corresponding to the position of each cylinder on the engine body correspond to the positions of the ports at the two ends of the channel in each cylinder cover.

Preferably, the camshaft hole, the main oil gallery and the water diversion channel are all arranged between two rows of cylinder sleeve mounting holes; the two water collecting channels are respectively arranged at the outer sides of the two rows of cylinder sleeve mounting holes.

Preferably, the cylinder sleeve mounting hole is of a three-section supporting structure and is respectively a first cylinder sleeve mounting hole, a second cylinder sleeve mounting hole and a third cylinder sleeve mounting hole, and the inner wall of the second cylinder sleeve mounting hole is in sealing connection with the outer wall of the cylinder sleeve through a cylinder sleeve sealing ring; a cooling cavity at the upper part of the cylinder sleeve is formed between the inner wall of the cylinder sleeve mounting hole, which is positioned between the first cylinder sleeve mounting hole and the second cylinder sleeve mounting hole, and the outer wall of the cylinder sleeve through a cylinder sleeve sealing ring; and a cooling cavity at the lower part of the cylinder sleeve is formed between the inner wall between the second cylinder sleeve mounting hole and the third cylinder sleeve mounting hole in the cylinder sleeve mounting hole and the outer wall of the cylinder sleeve through a cylinder sleeve sealing ring.

Preferably, the splashed oil return notch is formed in the position, located on the outer side of the third cylinder liner mounting hole, of the machine body.

Preferably, an included angle between the two rows of cylinder sleeve mounting holes forms a V-shaped structure; the cylinder sleeve mounting holes are all over against a main shaft arranged in the machine body; the two water collecting channels are respectively arranged on the machine body and are positioned on one side of the cylinder sleeve mounting hole away from the V-shaped included angle central shaft; the camshaft hole and the main oil duct are both arranged on a central shaft with a V-shaped included angle; the two water diversion channels are respectively arranged on the machine body and are positioned on one side, close to the V-shaped included angle central shaft, of the cylinder sleeve mounting hole.

Preferably, the main bearing cover is further included, and a main bearing hole for placing the main shaft is formed in the main bearing cover.

Compared with the prior art, the utility model has the advantages of it is following:

the structure of the utility model is divided into an upper part and a lower part for cooling, and the upper part is cooled by cooling liquid; because heat load is less down in the cylinder liner, consequently the utility model discloses a structure uses non-forced cooling, rotates through camshaft bearing and the oil that splashes and oil gas carries out a small amount of cooling to the cylinder liner lower part, plays pertinent benefit, has avoided excessive cooling to cause the engine heat loss.

For a heavy diesel engine, a camshaft generally adopts a full-support structure, namely, each gear of main journal is provided with lubricating oil, a bearing and a support; because each gear is forcibly lubricated by pressure lubricating oil, the oil amount of splashed oil leaked out of the bearing of each gear is quite sufficient, and the air flow in the crankcase can be used as a coolant of a cooling cavity at the lower part of the cylinder sleeve.

By the structure of the utility model, the cooling liquid is respectively divided into water by the water dividing channel to each cylinder cover for cooling, then returns to the cooling cavity at the upper part of the cylinder sleeve for cooling the cylinder sleeve of each cylinder, and finally collects the water collecting channel to return to the radiator (external connection); a high-heat-load area at the top of the cylinder sleeve is forcibly cooled by cooling liquid, an inlet and an outlet of the cooling liquid are respectively arranged at two sides of the center of the engine body, and the flow directions of water flows are uniformly distributed; and a low-heat-load area at the lower part of the cylinder sleeve (namely a cooling cavity at the lower part of the cylinder sleeve) is cooled (not compulsorily) by using a part splashed by lubricating oil of a camshaft bearing and oil gas of a crankcase. The main bearing cap bolt on the machine body is assembled and fastened through the stretcher, and the transverse pulling bolt is connected with the machine body and the main bearing cap, so that the rigidity of the gantry type machine body is increased.

Drawings

FIG. 1 is a schematic illustration of the cooling of a cylinder liner of a prior art 6-cylinder inline engine;

FIG. 2 is a front view of a V-shaped diesel engine body structure;

FIG. 3 is a left side view of FIG. 2 (partially a cross-sectional view A1-A1 in FIG. 7);

FIG. 4 is a rear view of FIG. 2;

FIG. 5 is a bottom view of FIG. 2;

FIG. 6 isbase:Sub>A right side view of FIG. 2 (base:Sub>A-A half sectional view in FIG. 7);

FIG. 7 is a top view of FIG. 4;

FIG. 8 is a partial cross-sectional view A2-A2 of FIG. 7 (cross-sectional view of the water diversion channel and the water diversion hole);

FIG. 9 is an isometric view of a V-shaped diesel engine block construction;

FIG. 10 is a schematic view of the cooling water flow in the upper portion of the cylinder liner of the engine block (with the cylinder liner assembled) (section view B1-B1 in FIG. 11);

FIG. 11 is a schematic view of the cooling water flow in the upper portion of the cylinder liner of the engine block (with the cylinder liner assembled) (section B-B in FIG. 10);

FIG. 12 is a schematic view of cooling of a lower portion of a cylinder liner of an engine block (assembled cylinder liner) (section B2-B2 in FIG. 10);

FIG. 13 is a schematic diagram of cooling a conventional V-shaped engine cylinder liner.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

The left and right sides and the upper and lower sides of the utility model are all relative to the positions of all parts in the attached drawings.

The utility model provides a V type diesel engine organism structure, as shown in fig. 2-12, it includes organism 1, main bearing cap 4, violently draw bolt 2 and packing ring 3, main bearing cap bolt 5 and nut 6, together processes main bearing hole 1.10 after the assembly together, forms at last the utility model discloses an organism structure. The bottom of the main bearing cap 4 is provided with a main bearing cap bolt 5, and the main bearing cap bolt 5 is connected with a nut 6 through threads; the intermediate position of 1 lower part of organism is equipped with main bearing cap 4, and main bearing cap 4's both sides all are connected with organism 1 through horizontal pull bolt 2, and 2 one end of every horizontal pull bolt is passed one side that packing ring 3, organism 1 in proper order and is connected with main bearing cap 4.

As shown in fig. 3, 5, 6 and 7, two rows of cylinder sleeve mounting holes corresponding to two rows of cylinders are respectively formed in the left side and the right side of the top of the machine body 1, and an included angle between the two rows of cylinder sleeve mounting holes forms a V-shaped structure, namely a V-shaped included angle; the cylinder sleeve mounting holes are opposite to a main shaft arranged in the machine body 1; and the cooling and lubricating systems of the two rows of cylinders are independent. The main bearing cover 4 is provided with a main bearing hole 1.10 for placing a main shaft.

At least two (7 in the embodiment) camshaft holes 1.8, a main oil duct 1.9 and two water distribution channels 1.1 are arranged in the area, located in the V included angle, of the machine body 1, two water collection channels 1.4 are further arranged on the machine body 1, and the two water collection channels 1.4 are respectively arranged on the machine body 1 and located on one side, away from the central shaft of the V included angle, of the cylinder sleeve mounting hole. The camshaft hole 1.8 and the main oil gallery 1.9 are both arranged on a central shaft with a V-shaped included angle; the two water diversion channels 1.1 are respectively arranged on the machine body 1 and are positioned on one side, close to the V-shaped included angle central shaft, of the cylinder sleeve mounting hole.

As shown in fig. 11, one cylinder liner 7 is provided in each cylinder liner mounting hole. As shown in fig. 6, the cylinder liner mounting hole is a three-section support structure, which is respectively a first cylinder liner mounting hole 1.15, a second cylinder liner mounting hole 1.13 and a third cylinder liner mounting hole 1.11, and the inner wall of the second cylinder liner mounting hole 1.13 is hermetically connected with the outer wall of the cylinder liner 7 through a cylinder liner sealing ring 8, as shown in fig. 11; the cylinder sleeve sealing ring 8 is a rubber ring seal.

As shown in fig. 6 and 12, an upper cylinder liner cooling cavity 1.14 is formed between the inner wall of the cylinder liner mounting hole, which is located between the first cylinder liner mounting hole 1.15 and the second cylinder liner mounting hole 1.13, and the outer wall of the cylinder liner 7 through a cylinder liner sealing ring 8; and a cylinder sleeve lower cooling cavity 1.12 is formed between the inner wall of the cylinder sleeve mounting hole, which is positioned between the second cylinder sleeve mounting hole 1.13 and the third cylinder sleeve mounting hole 1.11, and the outer wall of the cylinder sleeve 7 through a cylinder sleeve sealing ring 8.

Every cylinder cap lid is equipped with a passageway on every cylinder cap rather than a cylinder liner mounting hole that corresponds, and the both ends of passageway are connected and the switch-on with diversion hole 1.5 one end and inlet opening 1.2 one end respectively, and the one end of diversion hole 1.5 and the one end of inlet opening 1.2 all are located 1 top surface of organism.

As shown in fig. 8, 10, and 11, two water inlets 1.16 are disposed on the top surface of the machine body 1, the water inlets 1.16 are respectively communicated with the water diversion channels 1.1 located on the left and right sides in the machine body 1, the other end of the water diversion hole 1.5 corresponding to the position of each cylinder is communicated with the water diversion channel 1.1, the other end of each water inlet 1.2 is communicated with the upper cooling cavity 1.14 of the corresponding cylinder liner, the upper cooling cavity 1.14 of each cylinder liner is communicated with the water collection channels 1.4 on the left and right sides of the machine body 1 through the water return hole 1.3 corresponding to the position of each cylinder, the two water collection channels 1.4 are respectively communicated with the water outlet 1.17 at the front end of the machine body 1, and the water outlet 1.17 is connected to a radiator through a pipeline (the radiator belongs to a structure other than the structure of a V-type diesel engine body, and is not shown in the figure).

As shown in fig. 11 and 12, the liner cooling water jacket (i.e., the liner upper cooling cavity 1.14) has only one water inlet and one water outlet (i.e., the water inlet 1.2 and the water return 1.3) and is located on two opposite sides of the liner upper cooling cavity 1.14, so that water flow is uniformly distributed.

As shown in fig. 6 and 12, the camshaft chamber 1.6 is communicated with the cylinder liner lower cooling cavity 1.12 through the camshaft chamber splash oil and oil gas inlet 1.7, the cylinder liner lower cooling cavity 1.12 is communicated with the crankcase cavity 1.19 through a splash oil return notch 1.18, and the splash oil return notch 1.18 is provided at a position on the machine body 1, which is located outside the third cylinder liner mounting hole 1.11. The position of the oil splashing and oil gas inlet 1.7 of the camshaft chamber is right opposite to the hole on the side, close to the camshaft chamber 1.6, of the cam bush, so that the lubricating oil splashed by the rotation of the camshaft just passes through the oil splashing and oil gas inlet 1.7 of the camshaft chamber.

The splash oil return notch 1.18 is of a smaller size, much smaller than the size of the camshaft chamber splash oil and oil gas inlet 1.7. When camshaft rotational speed was bigger and bigger, the speed that gets into in the cylinder jacket lower part cooling chamber 1.12 through flying splash oil and oil gas was also bigger and bigger, when flying splash oil and oil gas from camshaft room 1.6 get into speed that splashes oil and oil gas in the cylinder jacket lower part cooling chamber 1.12 from splashing oil return breach 1.18 speed that splashes oil and oil gas in the cylinder jacket lower part cooling chamber 1.12 came out, flying splash oil and oil gas in the cylinder jacket lower part cooling chamber 1.12 increase gradually to increase the cooling rate in the cylinder jacket lower part cooling chamber 1.12.

The working principle of the utility model is as follows:

as shown in fig. 8, 10, and 11, the cooling method for the upper portion of the liner 7: the cooling liquid enters the water diversion channels 1.1 on the left side and the right side from the water inlet 1.16 respectively, enters a cylinder cover (not shown in the figure) through the water diversion holes 1.5 corresponding to the positions of the cylinders, then enters the cooling cavity 1.14 on the upper part of the cylinder sleeve through the water inlet holes 1.2, then enters the water collection channels 1.4 on the left side and the right side through the water return holes 1.3 corresponding to the positions of the cylinders, and finally enters the radiator for cooling through the water outlet 1.17 at the front end of the machine body 1. The cylinder liner 7 and the engine block 1 outside the cylinder liner upper cooling cavity 1.14 are cooled by the cooling liquid entering the cylinder liner upper cooling cavity 1.14.

As shown in fig. 6 and 12, a cam bush is arranged in the cam shaft hole 1.8, a cam shaft is arranged in the cam bush, a hole communicated with the main oil gallery 1.9 is formed in one side, close to the main oil gallery 1.9, of the cam bush, and a hole communicated with the cam shaft chamber 1.6 is formed in one side, close to the cam shaft chamber 1.6, of the cam bush, so that oil in the main oil gallery 1.9 enters between the cam bush and the cam shaft to lubricate the cam shaft.

Cooling mode of lower part of cylinder sleeve 7: when the camshaft rotates, lubricating oil of the camshaft bearing is discharged and then enters the camshaft chamber 1.6 together with oil gas through the rotating centrifugal force of the camshaft, and part of the lubricating oil and the oil gas enter the cooling cavity 1.12 at the lower part of the cylinder sleeve through the splashing oil and oil gas inlet 1.7 of the camshaft chamber and then return to the crankcase chamber 1.19 through the splashing oil return notch 1.18 on the third cylinder sleeve mounting hole 1.11. Another part of the lubricating oil is led directly from the camshaft chamber 1.6 into the crankcase cavity 1.19. The lubricating oil in the crankcase cavity 1.19 is collected to an oil pan, then is circulated to other parts through the oil pump for cooling and filtering, and then enters the main oil gallery 1.9 again for use. The cylinder liner 7 and the engine block 1 outside the cylinder liner lower cooling cavity 1.12 are cooled a little by oil and oil gas entering the cylinder liner lower cooling cavity 1.12.

The temperature difference around the cylinder sleeve 7 is small, and the deformation of the cylinder sleeve mounting hole caused by uneven heat load in the working process of the engine is reduced.

In the embodiment, QT450-10 is selected as the material of the engine body 1, so that the engine body has high strength and high fatigue resistance and can meet the requirement of high detonation pressure of an engine. The main bearing cover 4 adopts QT500-7, and the main bearing cover bolt 5, the nut 6 and the transverse pull bolt 2 all adopt 42CrMo, so that the requirements of high grade and high pretightening force of engine fasteners are met.

The utility model discloses utilized V type cam axle in the V contained angle, the camshaft position is just right, and cylinder liner lower part cooling cavity and camshaft room can have the communicating design of interface again and just can realize splashing and oil gas cooling. The structure is not required to be specially designed for splash lubrication.

Claims (10)

1. The utility model provides a V type diesel engine organism structure, a serial communication port, including organism (1), the both sides at organism (1) top are equipped with two lines of cylinder liner mounting holes that correspond with two lines of cylinders respectively, be equipped with two at least camshaft holes (1.8) on organism (1), a main oil duct (1.9) that provides lubricating oil for camshaft hole (1.8), two water diversion canals (1.1) and two water collecting channels (1.4), two water collecting channels (1.4) are put through with delivery port (1.17) of organism (1) front end respectively, all be equipped with a cylinder liner (7) in each cylinder liner mounting hole, be equipped with the upper portion cooling chamber (1.14) and the cylinder liner lower part cooling chamber (1.12) that separate each other between cylinder liner mounting hole inner wall and cylinder liner (7) outer wall, every cylinder position correspondence on organism (1) is equipped with a water diversion hole (1.5) and a inlet opening (1.2) that the water inlet (1.2) corresponds the water diversion hole (1.5) and the water inlet (1.1.2) that each water inlet (1.14) corresponds with the water inlet of each cylinder liner upper portion (1.14) and the water inlet (1.14) that the water inlet (1.2) corresponds to put through each other end, the water inlet of the water inlet (1.1.1.1.14) that the water diversion canal corresponds to put through each cylinder liner (1.1.1.1), the water inlet (1) is put through the water inlet (1.1.14) and the water inlet (1.1.1) that the water inlet (1) corresponds to put through the water inlet (1.14) and the water inlet (1.14) that each other end of each other end, the water inlet (1.14) is put through the water inlet (1.5) is put through the water inlet (1.14) is put through the water inlet (1.1.1.1.1.1), the water inlet is put through the water inlet of the water inlet is put through the water inlet (1.1.14) is put through the water inlet (1.1.1.1.1) is put through the water inlet (1.1), the water inlet (1.14) is put through the water inlet (1) is put through, the water inlet of the water inlet (1.1), the water inlet is put through 1.3 Is communicated with a water collecting channel (1.4) close to the cooling cavity (1.14) at the upper part of the cylinder sleeve; camshaft chamber (1.6) that camshaft hole (1.8) both sides were equipped with respectively and are used for collecting the camshaft rotation and the lubricating oil that splashes out, camshaft chamber (1.6) are through camshaft chamber splash oil and oil gas entry (1.7) and cylinder jacket lower part cooling chamber (1.12) switch-on, and cylinder jacket lower part cooling chamber (1.12) are through splashing oil return breach (1.18) and crankcase cavity (1.19) switch-on, camshaft chamber (1.6) and crankcase cavity (1.19) switch-on.

2. A V-type diesel engine body structure as defined in claim 1, characterized in that a cam bush is provided in the camshaft hole (1.8), a camshaft is provided in the cam bush, a hole communicating with the main oil gallery (1.9) is provided on the side of the cam bush close to the main oil gallery (1.9), a hole communicating with the camshaft chamber (1.6) is provided on the side of the cam bush close to the camshaft chamber (1.6); the position of the inlet (1.7) of the splashed oil and oil gas of the camshaft chamber is opposite to the hole on the side, close to the camshaft chamber (1.6), of the cam bush.

3. A V-diesel engine block construction according to claim 1, characterised in that the splash oil return gap (1.18) is smaller in size than the camshaft chamber splash oil and oil air inlet (1.7).

4. A V-type diesel engine block structure as claimed in claim 1, characterized in that said cylinder liner upper cooling chamber (1.14) has only one water inlet hole (1.2) and one water return hole (1.3), and the water inlet hole (1.2) and the water return hole (1.3) are respectively located at opposite sides of the cylinder liner upper cooling chamber (1.14).

5. A V-diesel engine block structure as claimed in claim 1, characterized in that the location of the water diversion hole (1.5) and the water inlet hole (1.2) corresponding to the location of each cylinder on the block (1) corresponds to the location of the ports at both ends of the channel in each cylinder cover.

6. The V-shaped diesel engine body structure as claimed in claim 1, wherein the camshaft hole (1.8), the main oil gallery (1.9) and the water diversion gallery (1.1) are all arranged between two rows of cylinder sleeve mounting holes; the two water collecting channels (1.4) are respectively arranged at the outer sides of the two rows of cylinder sleeve mounting holes.

7. The V-type diesel engine body structure as claimed in claim 1, characterized in that the cylinder liner mounting hole is a three-section supporting structure, which is a first cylinder liner mounting hole (1.15), a second cylinder liner mounting hole (1.13) and a third cylinder liner mounting hole (1.11), and the inner wall of the second cylinder liner mounting hole (1.13) is hermetically connected with the outer wall of the cylinder liner (7) through a cylinder liner sealing ring (8); an upper cooling cavity (1.14) of the cylinder sleeve is formed between the inner wall of the cylinder sleeve mounting hole, which is positioned between the first cylinder sleeve mounting hole (1.15) and the second cylinder sleeve mounting hole (1.13), and the outer wall of the cylinder sleeve (7) through a cylinder sleeve sealing ring (8); and a cylinder sleeve lower cooling cavity (1.12) is formed between the inner wall between the second cylinder sleeve mounting hole (1.13) and the third cylinder sleeve mounting hole (1.11) in the cylinder sleeve mounting hole and the outer wall of the cylinder sleeve (7) through a cylinder sleeve sealing ring (8).

8. The V-type diesel engine block structure as claimed in claim 7, characterized in that said splash oil return notch (1.18) is provided in the block (1) at a position outside the third cylinder liner mounting hole (1.11).

9. The V-type diesel engine body structure as claimed in claim 1, wherein an included angle between two rows of cylinder liner mounting holes forms a V-type structure; the cylinder sleeve mounting holes are opposite to a main shaft arranged in the machine body (1); the two water collecting channels (1.4) are respectively arranged on the machine body (1) and are positioned on one side of the cylinder sleeve mounting hole away from the central axis of the V-shaped included angle; the camshaft hole (1.8) and the main oil duct (1.9) are arranged on a central shaft with a V-shaped included angle; the two water diversion channels (1.1) are respectively arranged on the machine body (1) and are positioned on one side of the cylinder sleeve mounting hole close to the V-shaped included angle central shaft.

10. A V-diesel engine block construction according to claim 1, further comprising a main bearing cap (4), the main bearing cap (4) being provided with a main bearing hole (1.10) for receiving the main shaft.

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