Engine body with cooling structure and engine

Abstract

The invention discloses an engine body with a cooling structure and an engine, and relates to the technical field of engine cooling. A cooling cavity used for installing an engine oil cooler is formed between the cylinder holes in the two sides, the cooling cavity is provided with a main liquid inlet, and a fluid channel for cooling liquid to flow is formed between the engine oil cooler and the inner wall of the cooling cavity. A first water jacket cavity communicated with the cooling cavity is formed in one side of the cooling cavity around the periphery of the cylinder hole; a second water jacket cavity communicated with the cooling cavity is formed in the other side of the cooling cavity around the periphery of the cylinder hole; the arrangement of a water distribution cavity is omitted, the design without the water distribution cavity is realized, the weight of an engine body and the whole engine can be reduced, the strength and the stability of a sand core are enhanced, and the casting manufacturability is improved; the built-in cooling structure is realized, so that the flow velocity of the water jacket and the uniformity of the water flow among the cylinders are improved, and the cylinder holes are forced to be uniformly cooled in the circumferential direction.

Description

Technical Field

[0001] The present application belongs to the technical field of engine cooling, and in particular relates to a body and an engine with a cooling structure. Background Art

[0002] The cylinder liner of the engine supports the reciprocating motion of the piston and together with the cylinder head and piston form the cylinder working space. Cylinder liners are divided into wet cylinder liners and dry cylinder liners; the wall thickness of the wet cylinder liner is generally 5-8 mm, and its outer surface is directly in contact with the coolant; the wall thickness of the dry cylinder liner is 2-3 mm and is not in contact with the coolant. When using a dry cylinder liner, in order to enable the cylinder liner to transfer the heat of the piston assembly and itself to the cooling water so that the working temperature is appropriate, two water distribution methods are usually used:

[0003] The first is an external water inlet pipe. In this method, a separate water inlet pipe is required, and there are many parts, such as water inlet pipe, rubber ring, gasket and bolts, and there are many sealing failure points, because a separate water inlet pipe means that each cylinder must be designed with a water jacket core head connected to the water inlet pipe. In addition to considering the failure of rubber rings or gaskets, the risk of water jacket floating core must also be considered. This risk is generally not easy to detect and will only be discovered in the assembly or subsequent test run, thus affecting the production rhythm and is not conducive to production and safe operation of the vehicle;

[0004] The second method is to use the method of casting a water distribution cavity in the engine body to achieve water intake. Therefore, it is necessary to separately add a water distribution cavity sand core in the design and casting process. The core assembly process is more complicated, and the casting production difficulty is increased. In addition, in order to facilitate cleaning, special sand cleaning holes need to be designed, which will lead to leakage points. In addition, in addition to the necessary cavity area, the water distribution cavity also needs to design separate core heads at the front and rear ends of the sand core as fixed supports during core assembly, which will occupy the space of the engine and is not conducive to the layout of the whole machine. For example, the power unit of the transverse engine has insufficient space and deviates to one side, resulting in a speed difference in the front wheel, causing the front of the vehicle to swing left and right, and the driving space of the longitudinal engine will be lost, which will further affect the safe operation of the whole vehicle. Summary of the invention

[0005] The present application provides a body and an engine with a cooling structure to solve the above-mentioned technical problems that the external water inlet pipe causes a large number of parts and many sealing failure points; the core assembly process caused by the use of a separate water distribution cavity is more complicated, the casting production difficulty is increased, and it is necessary to design separate core heads at the front and rear ends of the sand core as fixed supports during core assembly, which will occupy the space of the engine.

[0006] The technical solution adopted in this application is:

[0007] A machine body with a cooling structure, characterized in that it includes a cylinder body with multiple cylinder holes on both sides; a cooling cavity for installing an oil cooler is formed between the cylinder holes on both sides, and the cooling cavity has a main liquid inlet; a fluid channel for coolant circulation is formed between the oil cooler and the inner wall of the cooling cavity; a first water jacket cavity connected to the cooling cavity is opened around the outer periphery of the cylinder hole on one side of the cooling cavity; and a second water jacket cavity connected to the cooling cavity is opened around the outer periphery of the cylinder hole on the other side of the cooling cavity.

[0008] The machine body with a cooling structure of the present application also has the following additional technical features:

[0009] The cooling chamber is provided with a first liquid separation port that connects the first water jacket chamber with the fluid channel, and a second liquid separation port that connects the second water jacket chamber with the fluid channel; a first limiting belt is connected to a side of the cooling chamber close to the main liquid inlet, and a second limiting belt is connected to a side of the cooling chamber close to the second liquid separation port; the first limiting belt and the second limiting belt can guide the coolant to force the coolant to flow along the periphery of the oil cooler to cool the oil inside the oil cooler.

[0010] A coordination chamber is formed on one side of the cooling chamber opposite to the main liquid inlet, and the coordination chamber can evenly distribute the cooling liquid entering the first water jacket chamber and the second water jacket chamber; the width of the coordination chamber is not less than the width of the first liquid separation port or the width of the second liquid separation port.

[0011] The first water jacket cavity is provided with a first liquid inlet connected with the first liquid separation port, the first liquid separation port and the first liquid inlet are connected to form a first guide passage, a slope of a preset angle is formed between the first guide passage and the main liquid inlet, and a transition fillet is formed between the first guide passage and the first water jacket cavity.

[0012] The first water jacket cavity has a plurality of first water passage cavities connected in parallel; a first inter-cylinder water blocking wall is formed on the side facing the inside of the machine body between two adjacent first water passage cavities, and a first water string hole capable of circulating the coolant between the plurality of first water passage cavities is formed on one side of the first inter-cylinder water blocking wall; a first inter-cylinder liquid separation port is formed on the side facing the outside of the machine body between two adjacent first water passage cavities.

[0013] A plurality of first upper liquid holes protruding from the end of the first water passage chamber are arranged on one side of the first water passage chamber facing the outside of the machine body, and the coolant can flow toward the cylinder head through the first upper liquid holes.

[0014] The height of the bottom wall of the first inter-cylinder liquid separation port is at least more than one half of the height of the first water jacket cavity; the slope formed between the first guide channel and the main liquid inlet is in the range of 15°-30°; the transition radius formed between the first guide channel and the first water jacket cavity is not less than 15mm.

[0015] The height of the bottom wall of the cooling cavity can be flush with the height of the bottom walls of the first liquid separation port and the second liquid separation port; or, the height of the bottom wall of the cooling cavity can be not lower than the height of the bottom walls of the first liquid separation port and the second liquid separation port.

[0016] The height of the bottom wall of the cooling cavity can be flush with the height of the bottom wall of the main liquid inlet; or, the height of the bottom wall of the cooling cavity is not lower than the height of the bottom wall of the main liquid inlet.

[0017] The present application also relates to an engine, comprising the above-mentioned engine body with a cooling structure; the engine body is a dry cylinder liner engine body, the dry cylinder liner engine body comprises a cylinder body with a plurality of cylinder holes on both sides; the inner wall of the cylinder hole is connected to the dry cylinder liner; or,

[0018] The engine body is a cylinder liner-free engine body, and the cylinder liner-free engine body comprises a cylinder body with a plurality of cylinder holes on both sides, and the inner walls of the cylinder holes are not connected with cylinder liners.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0020] 1. The present invention discloses a body with a cooling structure, comprising a cylinder body, wherein the cylinder body has a plurality of cylinder holes on both sides; a cooling cavity with a main liquid inlet for installing an oil cooler is formed between the cylinder holes; the cooling cavity of the oil cooler is installed as a cavity for a first water jacket cavity and a second water jacket cavity that can flow to both sides of the cooling cavity, thereby omitting the arrangement of the water distribution cavity, thereby avoiding the need to separately add a water distribution cavity sand core during the casting process caused by the traditional use of an additional water distribution cavity, which makes the core assembly process complicated and cumbersome and increases the difficulty, and additionally adds a sand cleaning hole for cleaning the sand core, thereby avoiding the increase in leakage points caused by the arrangement of the water distribution cavity sand core at the front and rear ends of the sand core, thereby avoiding the additional core head for fixing and supporting the sand core due to the arrangement of the water distribution cavity sand core, thereby saving the arrangement space of the whole machine and improving the safe operation of the engine; the cooling cavity can replace the water distribution cavity, so that A fluid channel for coolant circulation is formed between the engine oil cooler and the inner wall of the cooling chamber; the coolant enters the fluid channel through the main liquid inlet and then divides into two paths, one path enters the cooling chamber through the first liquid separation port, and a first water jacket cavity is opened around the outer periphery of the cylinder hole on one side; the other path enters the cooling chamber through the second liquid separation port, and a second water jacket cavity is opened around the outer periphery of the cylinder hole on the other side; thereby achieving balanced cooling of each cylinder in the engine body, and by opening the first water jacket cavity and the second water jacket cavity inside the engine body, the cooling structure is built-in, thereby improving the uniformity of the water jacket flow rate and the water flow rate between each cylinder, and forcing the cylinder hole to be cooled uniformly in the circumference; and by opening the cooling chamber, the first water jacket cavity and the second water jacket cavity inside the engine body, a water-free design is achieved, which can reduce the weight of the engine body and the entire engine, enhance the strength and stability of the sand core, and improve the casting processability.

[0021] 2. As a preferred embodiment of the present application, a first limiting band is connected to a side of the cooling chamber close to the main liquid inlet, and a second limiting band is connected to a side of the cooling chamber close to the second liquid separation port; the first limiting band and the second limiting band can guide the coolant to force the coolant to flow along the periphery of the oil cooler to cool the oil inside the oil cooler.

[0022] The purpose of providing the first limiting belt and the second limiting belt on both sides of the cooling cavity is to enable the coolant to be forced to flow around the outer side of the oil cooler under the guidance of the first limiting belt and the second limiting belt to fully cool the oil inside the oil cooler. Because the coolant can be forced to flow around the outer periphery of the oil cooler in the cooling cavity under the blocking effect of the first limiting belt and the second limiting belt, it can further achieve uniform distribution on the outer periphery of the oil cooler and further achieve sufficient cooling of the oil inside the oil cooler.

[0023] 3. As a preferred embodiment of the present application, a coordination chamber is formed on one side of the corresponding main liquid inlet in the cooling chamber, and the coordination chamber can evenly distribute the cooling liquid entering the first water jacket chamber and the second water jacket chamber; the width of the coordination chamber is not less than the width of the first liquid separation port or the width of the second liquid separation port.

[0024] The purpose of setting the coordination chamber is to be able to balance the coolant in the first water jacket chamber and the second water jacket chamber, so that the flow of the coolant flowing into the first water jacket chamber and the coolant flowing into the second water jacket chamber is balanced. Therefore, the width of the coordination chamber is not easy to be too narrow, and it is necessary to have a certain width or a certain cross-sectional area. The cross-sectional area is not much different from the width of the first liquid separation port or the second liquid separation port, at least not less than the width of the first liquid separation port or the second liquid separation port, so that after the coolant flows through the coordination chamber, the coolant in the first liquid separation port and the second liquid separation port can be further balanced. Diversion, which can play a role in balanced water distribution to a certain extent, improve the efficiency of voltage stabilization.

[0025] 4. As a preferred embodiment of the present application, the first water jacket cavity is provided with a first liquid inlet connected to the first liquid separation port, the first liquid separation port and the first liquid inlet are connected to form a first guide passage, a slope of a preset angle is formed between the first guide passage and the main liquid inlet, and a transition fillet is formed between the first guide passage and the first water jacket cavity.

[0026] In order to ensure that the coolant in the cooling chamber can fully cool the upper cylinder head part when entering the first water jacket chamber or the second water jacket chamber, a certain slope is formed between the first liquid separation port and the first liquid inlet, and the angle is preferably 15°-30° to achieve a good cooling effect.

[0027] 5. As a preferred embodiment of the present application, the height of the bottom wall of the cooling chamber can be flush with the height of the bottom walls of the first liquid separation port and the second liquid separation port; or, the height of the bottom wall of the cooling chamber can be not lower than the height of the bottom walls of the first liquid separation port and the second liquid separation port.

[0028] The bottom wall of the main liquid inlet is higher than the bottom walls of the first liquid branch port and the second liquid branch port, so that the liquid level of the coolant entering from the main liquid inlet is higher than the liquid level of the coolant branched to the first liquid branch port and the second liquid branch port, thereby increasing the flow pressure of the liquid, so that the coolant can enter the cooling cavity from the main liquid inlet and flow fully in the circulation channel, thereby enhancing the flow performance of the coolant, and the coolant can be further directed from the main liquid inlet toward the first liquid branch port and the second liquid branch port, so that the coolant can be drained and sufficient cooling can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0030] Figure 1 This is a schematic structural diagram of a water jacket sand core for casting a machine body with a cooling structure according to an embodiment of the present application;

[0031] Figure 2 It is a front view structural schematic diagram of a first water jacket cavity sand core of a water jacket sand core for casting a machine body with a cooling structure according to an embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of a top view of the structure of a first water jacket cavity sand core of a water jacket sand core for casting a machine body with a cooling structure according to an embodiment of the present application;

[0033] Figure 4 This is a schematic diagram of the left side structure of a first water jacket cavity sand core of a water jacket sand core for casting a machine body with a cooling structure according to an embodiment of the present application;

[0034] Figure 5 It is a schematic diagram of the cross-sectional structure of a single-cylinder water jacket sand core of a water jacket sand core for casting a machine body with a cooling structure according to an embodiment of the present application;

[0035] In the figure,

[0036] 1. Oil cooler installation position; 2. Cooling cavity; 3. Main liquid inlet; 4. First water jacket cavity; 5. Second water jacket cavity; 6. First liquid separation port; 7. Second liquid separation port; 8. First limit belt; 9. Second limit belt; 10. Coordination cavity; 11. First guide passage; 12. Second guide passage; 13. First water passage cavity; 14. Second water passage cavity; 15. First inter-cylinder water blocking wall; 16. First water string hole; 17. First inter-cylinder liquid separation port; 18. First upper liquid hole; 19. Second upper liquid hole; 20. First liquid inlet;

[0037] θ-a slope with a preset angle is formed between the first guide channel and the main liquid inlet;

[0038] R- A transition fillet is formed between the first guide passage and the first water jacket cavity;

[0039] L-cylinder bore height;

[0040] l-the height of the sand core of the single cylinder water jacket;

[0041] l 1- The thickness of the top plate of the single cylinder water jacket sand core. DETAILED DESCRIPTION

[0042] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0044] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0047] The present application relates to a machine body with a cooling structure, such as Figure 1-5 As shown, it includes a cylinder body with multiple cylinder holes on both sides of the cylinder body; a cooling chamber 2 with a main liquid inlet 3 is formed between the cylinder holes, and an oil cooler mounting position 1 for mounting an oil cooler is provided in the center of the cooling chamber 2, and a fluid channel for coolant circulation is formed between the oil cooler and the inner wall of the cooling chamber 2; a first water jacket chamber 4 is provided around the periphery of the cylinder hole on one side of the cooling chamber 2, and a first liquid separation port 6 is provided in the cooling chamber 2 to connect the first water jacket chamber 4 with the fluid channel; a second water jacket chamber 5 is provided around the periphery of the cylinder hole on the other side of the cooling chamber 2, and a second liquid separation port 7 is provided in the cooling chamber 2 to connect the second water jacket chamber 5 with the fluid channel.

[0048] A body with a cooling structure of the present application is formed with a cooling cavity in the middle for storing coolant, and a first water jacket cavity and a second water jacket cavity capable of realizing a flow space for the coolant are respectively arranged on both sides of the cooling cavity, so that the whole can be in a V-shaped, H-shaped or other structure. Preferably, a V-shaped structure is adopted to form a cooling cavity in the middle for storing coolant, and the position of the whole is close to the lower part of the first water jacket cavity and the second water jacket cavity on both sides, which is conducive to the coolant being uniformly cooled in the cooling cavity first and then flowing to the first water jacket cavity and the second water jacket cavity;

[0049] There are multiple cylinder holes on both sides of the cylinder body; a cooling cavity 2 with a main liquid inlet 3 for installing an oil cooler is formed between the cylinder holes. By installing the cooling cavity 2 of the oil cooler as a cavity that can flow to the first water jacket cavity 4 and the second water jacket cavity 5 on both sides of the cooling cavity 2, the arrangement of the water distribution cavity is omitted, thereby avoiding the need to separately add a water distribution cavity sand core during the casting process caused by the traditional use of an additional water distribution cavity, the core assembly process is complicated and difficult, and additional sand cleaning holes are added to clean the sand core, thereby avoiding the increase in leakage points caused by the arrangement of the water distribution cavity sand core at the front and rear ends of the sand core, thereby avoiding the additional core head for fixing and supporting the sand core due to the arrangement of the water distribution cavity sand core at the front and rear ends of the sand core, thereby saving the space for the arrangement of the entire machine and improving the safe operation of the engine;

[0050] The cooling chamber 2 of the present application can replace the water distribution chamber, thereby omitting the water distribution chamber. In addition to accommodating the engine oil cooler, the cooling chamber 2 can also realize a fluid channel for the circulation of coolant between the engine oil cooler and the inner wall of the cooling chamber 2. The flow path of the coolant entering the cooling chamber 2 is as follows: the coolant enters the fluid channel through the main liquid inlet 3, and then is divided into two paths, one path enters the cooling chamber 2 through the first liquid separation port 6, and a first water jacket chamber 4 is opened around the outer periphery of the cylinder hole on one side; the other path enters the cooling chamber 2 through the second liquid separation port 7, and a second water jacket chamber 5 is opened around the outer periphery of the cylinder hole on the other side; thereby achieving balanced cooling of each cylinder in the engine body, and by opening the first water jacket chamber 4 and the second water jacket chamber 5 inside the engine body, the cooling structure is built-in, thereby improving the uniformity of the water jacket flow rate and the water flow rate between each cylinder, and forcing the cylinder hole to be uniformly cooled circumferentially; and the cooling chamber 2, the first water jacket chamber 4 and the second water jacket chamber 5 are opened inside the engine body to realize a design without a water distribution chamber, which can reduce the weight of the engine body and the entire engine, enhance the strength and stability of the sand core, and improve the casting processability.

[0051] The traditional oil cooler is arranged on the outside of the engine body, but in the present application, the position where the oil cooler is originally required to be stored is designed to be located inside the body and between the cylinder holes on both sides, and a cooling chamber for holding the coolant is opened in the cavity where the oil cooler is arranged; there is no need to set up an additional water distribution chamber, which not only simplifies the structure and makes the entire body more compact, but also can enhance the rapid flow of coolant to the surroundings of each cylinder hole on both sides to achieve uniform cooling.

[0052] like Figure 1 As shown, for the water jacket sand core that forms the cooling structure of the present application, the water jacket sand core needs to be placed in the sand box during the casting process, and the sand mold and the water jacket sand core are combined together as required to complete the casting mold, and then poured into the sand box, that is, the liquid metal is filled into the casting mold. After the casting is cooled to a certain degree in the sand mold, the sand needs to be removed, and a qualified machine body is obtained after the sand core is taken out. At this time, the cooling cavity 2, the first water jacket cavity 4 and the second water jacket cavity 5 are formed at the position where the water jacket sand core was originally located inside the machine body, so that a cavity structure without a water jacket is formed inside the machine body, and the coolant flows in the cooling cavity 2, the first water jacket cavity 4 and the second water jacket cavity 5 to achieve sufficient cooling of the machine body. Since the present application opens the first water jacket cavity 4 and the second water jacket cavity 5 inside the machine body, avoiding the traditional setting of the water jacket and the setting of the water distribution cavity, the wall thickness of the machine body in the area without the water jacket can be reduced to a certain extent, thereby achieving the effect of weight reduction.

[0053] like Figure 2 As shown, one side of the water jacket sand core forms a first water jacket cavity sand core for making a first water jacket cavity 4 , and the other side of the water jacket sand core forms a second water jacket cavity sand core for making a second water jacket cavity 5 .

[0054] As a preferred embodiment, the cooling chamber 2 is provided with a first liquid separation port 6 for connecting the first water jacket chamber 4 with the fluid channel, and a second liquid separation port 7 for connecting the second water jacket chamber 5 with the fluid channel; a first limiting belt 8 is connected to the side of the cooling chamber 2 close to the main liquid inlet 3, and a second limiting belt 9 is connected to the side of the cooling chamber 2 close to the second liquid separation port 7; the first limiting belt 8 and the second limiting belt 9 can guide the coolant to force the coolant to flow along the periphery of the oil cooler to cool the oil inside the oil cooler.

[0055] The purpose of providing the first limiting belt 8 and the second limiting belt 9 on both sides of the cooling chamber 2 is to enable the coolant to fully cool the oil cooler around the outside of the oil cooler under the guidance of the first limiting belt 8 and the second limiting belt 9. Because the coolant can be forced to flow around the outer periphery of the oil cooler in the cooling chamber 2 under the blocking effect of the first limiting belt 8 and the second limiting belt 9, it can further achieve a uniform distribution on the outer periphery of the oil cooler, and further achieve sufficient cooling of the oil inside the oil cooler.

[0056] As a preferred embodiment, a coordination chamber 10 is formed on one side of the corresponding main liquid inlet 3 in the cooling chamber 2, and the coordination chamber 10 can evenly distribute the cooling liquid entering the first water jacket chamber 4 and the second water jacket chamber 5; the width of the coordination chamber 10 is not less than the width of the first liquid separation port 6 or the width of the second liquid separation port 7.

[0057] The purpose of setting the coordination chamber 10 is to be able to balance the coolant in the first water jacket chamber 4 and the second water jacket chamber 5, so that the flow of the coolant flowing into the first water jacket chamber 4 and the coolant flowing into the second water jacket chamber 5 are balanced. Therefore, the width of the coordination chamber 10 is not easy to be too narrow, and it is necessary to have a certain width or a certain cross-sectional area. The cross-sectional area is not much different from the width of the first liquid separation port 6 or the second liquid separation port 7, at least not less than the width of the first liquid separation port 6 or the second liquid separation port 7, so that after the coolant flows through the coordination chamber 10, the coolant in the first liquid separation port 6 and the second liquid separation port 7 can be further balanced. Diversion, which can play a role in balanced water distribution to a certain extent, improve the efficiency of voltage stabilization.

[0058] Further, the first water jacket cavity 4 is provided with a first liquid inlet 20 connected to the first liquid separation port 6, and an inclined first guide passage 11 is formed between the first liquid separation port 6 and the first liquid inlet 20, so that a slope of a preset angle is formed between the first guide passage 11 and the main liquid inlet 3, and further, the slope of the preset angle formed between the first guide passage 11 and the main liquid inlet 3 has a value range of 15°-30°;

[0059] The second water jacket cavity 5 is provided with a second liquid inlet connected to the second liquid separation port 7, and an inclined second guide channel 12 is formed between the second liquid separation port 7 and the second liquid inlet, so that a slope θ of a preset angle is formed between the second guide channel 12 and the main liquid inlet 3. Furthermore, the slope θ of the preset angle formed between the second guide channel 12 and the main liquid inlet 3 has a value range of 15°-30°.

[0060] In order to allow the coolant in the cooling chamber 2 to sufficiently cool the upper cylinder head portion when entering the first water jacket chamber 4 or the second water jacket chamber 5, a certain slope is formed between the first liquid separation port 6 and the first liquid inlet 20, and the angle is preferably 15°-30° to achieve a good cooling effect.

[0061] As a preferred embodiment, the first water jacket cavity 4 has a plurality of first water passage cavities 13 connected in parallel; a first inter-cylinder water blocking wall 15 is formed on the side facing the inside of the machine body between two adjacent first water passage cavities 13, and a first water string hole 16 capable of circulating the coolant between the plurality of first water passage cavities 13 is formed on one side of the first inter-cylinder water blocking wall 15; a first inter-cylinder liquid separation port 17 is formed on the side facing the outside of the machine body between two adjacent first water passage cavities 13;

[0062] Furthermore, the second water jacket cavity 5 has a plurality of second water transfer cavities 14 connected in parallel; a second inter-cylinder water blocking wall is formed on the side facing the inside of the machine body between two adjacent second water transfer cavities 14, and a second water string hole capable of circulating the coolant between the plurality of second water transfer cavities 14 is formed on one side of the second inter-cylinder water blocking wall; a second inter-cylinder liquid separation port is formed on the side facing the outside of the machine body between two adjacent second water transfer cavities 14.

[0063] like Figure 3 and Figure 4 As shown, since the first inter-cylinder water blocking wall 15 has the same structure as the second inter-cylinder water blocking wall, the first inter-cylinder water blocking wall 15 is taken as an example for detailed description below. A through hole is formed between the plurality of first water passage chambers 13. Since the through hole is on the water jacket sand core, a solid structure inside the body, namely the first inter-cylinder water blocking wall 15, will be formed at the position of the through hole after casting. The purpose of providing the first inter-cylinder water blocking wall 15 is to make the coolant flow between the first water passage chambers 13 more uniform, so that the coolant can be fully and uniformly cooled toward the circumferential direction of the cavity wall of the first water passage chamber 13 under the diversion effect of the first inter-cylinder water blocking wall 15, and the flow pressure of the coolant is enhanced, especially for forced cooling of the area with a longer path. Therefore, the first inter-cylinder water blocking wall 15 is provided between the first water passage chambers 13 on the opposite side of the first liquid separation port 6, and the first inter-cylinder water blocking wall 15 can strengthen the rigidity of the body top plate, improve the sealing reliability of the cylinder gasket, and reduce the deformation of the cylinder hole.

[0064] like Figure 3 and Figure 4 As shown, since the first inter-cylinder liquid separation port 17 has the same structure as the second inter-cylinder liquid separation port, the first inter-cylinder liquid separation port 17 is taken as an example for description below. A first inter-cylinder liquid separation port 17 is also formed between each first water transfer chamber 13. The coolant enters from the first liquid separation port 6 and then enters the first inter-cylinder liquid separation port 17 through the first liquid inlet 20. It circulates between the multiple first water transfer chambers 13 through the first inter-cylinder liquid separation port 17, thereby further improving the circumferential uniform cooling of the coolant between the multiple first water transfer chambers 13.

[0065] like Figure 4 As shown, since the first series of water holes 16 and the second series of water holes have the same structure, the first series of water holes 16 are used as an example for description below. The first series of water holes 16 are also connected between the bottoms of the multiple first water passage chambers 13, so that the coolant can fully flow between the multiple first water passage chambers 13 and be fully discharged, avoiding the phenomenon of being retained at the bottom of the first water passage chamber 13 and being unable to be emptied, so that the bottoms of the various first water passage chambers 13 can be connected in series, and the coolant is gathered and discharged together, which ensures that it is drained cleanly while reducing the leakage points of each first water passage chamber 13, preventing the coolant from leaking due to failure to be discharged in time.

[0066] Furthermore, a plurality of first upper liquid holes 18 protruding from the end of the first water transition chamber 13 are provided on the side of the first water transition chamber 13 facing the outside of the machine body, and the coolant can flow toward the cylinder head through the first upper liquid holes 18; in addition, a plurality of second upper liquid holes 19 protruding from the end of the second water transition chamber 14 are provided on the side of the second water transition chamber 14 facing the outside of the machine body, and the coolant can flow toward the cylinder head through the second upper liquid holes 19.

[0067] like Figure 3 As shown, the first upper liquid hole 18 and the second upper liquid hole 19 have the same structure. The first upper liquid hole 18 is taken as an example for description. At least one first upper liquid hole 18 is arranged at the top of each first water passage chamber 13. The coolant in the first water passage chamber 13 can flow upward through the first upper liquid hole 18. The coolant can flow upward through the first upper liquid hole 18 to cool the cylinder head on the upper part of the engine body.

[0068] like Figure 5 The sand core structure of the first water-passing cavity 13 in the first water-jacket cavity 4 or the second water-passing cavity 14 in the second water-jacket cavity 5 is shown, which is recorded as a single-cylinder water-jacket sand core, whose cylinder hole height is L, the height of the single-cylinder water-jacket sand core is l, and the thickness of the top plate of the single-cylinder water-jacket sand core is l. 1 In order to cool the piston well, reduce weight, and ensure the rigidity of the top surface of the engine, the top plate thickness is l 1 The value range is 10-15mm; the thin top plate design can better cool the piston ring, avoiding a series of problems such as excessive top temperature causing oil coking, poor cylinder bore deformation, and abnormal wear of the cylinder liner;

[0069] In addition, in order to increase the flow rate of the coolant at the bottom of the machine body, the single-cylinder water jacket sand core is made into a short water jacket sand core, so the ratio of the height l of the single-cylinder water jacket sand core to the cylinder hole height L can be in the range of l / L: 40% to 60%, thereby improving the flow rate of the lower coolant, and reducing the height difference of the coolant flowing from the cooling chamber 2 to the first water jacket chamber 4 and the second water jacket chamber 5, thereby improving the flow performance and flow rate, avoiding coolant waste, and further enhancing the heat exchange efficiency. Moreover, since the cavity is arranged inside the machine body, the height of the single-cylinder water jacket sand core can be effectively reduced, thereby further reducing the overall weight of the entire water jacket sand core, enhancing the strength and stability of the water jacket sand core, and improving the casting processability.

[0070] Furthermore, the height of the bottom wall of the first inter-cylinder liquid separation port 17 is at least one-half of the height of the first water jacket cavity 4; the height of the bottom wall of the second inter-cylinder liquid separation port is at least one-half of the height of the second water jacket cavity 5. This allows the coolant to have a high height difference when it enters the cooling cavity 2 from the main liquid inlet 3 and then flows through the first liquid inlet 20 and the second liquid inlet, so that the coolant has a good flow pressure, increases the flow capacity, and thus improves the flow performance of the coolant.

[0071] Furthermore, in order to make the coolant flowing out of the first water jacket cavity 4 flow evenly between each of the first water transfer cavities 13 described below, or the coolant flowing out of the second water jacket cavity 5 flow evenly between each of the second water transfer cavities 14 described below, and to fully cool the upper cylinder head, the first guide passage 11 between the first water jacket cavity 4 and the cooling cavity 2 is tilted, and the second guide passage 12 between the second water jacket cavity 5 and the cooling cavity 2 is tilted, and a transition fillet is formed between the first guide passage 11 and the peripheral surface of the first water jacket cavity 4, and a transition fillet is formed between the second guide passage 12 and the peripheral surface of the second water jacket cavity 5, and the transition fillet needs to be large enough and smooth;

[0072] Preferably, the transition radius R formed between the first guide channel 11 and the first water jacket cavity 4 and the transition radius R formed between the second guide channel 12 and the second water jacket cavity 5 are both not less than 15 mm, thereby increasing the coolant fluid pressure and flowing into the multiple first water transition cavities 13 or the multiple second water transition cavities 14, thereby further improving the cooling capacity.

[0073] As a preferred embodiment, the height of the bottom wall of the main liquid inlet 3 can be flush with the height of the bottom walls of the first liquid separation port 6 and the second liquid separation port 7; or, the height of the bottom wall of the main liquid inlet 3 can be no lower than the height of the bottom walls of the first liquid separation port 6 and the second liquid separation port 7.

[0074] The bottom wall of the cooling chamber 2 is higher than the bottom walls of the first liquid separation port 6 and the second liquid separation port 7, so that the liquid level of the coolant entering the cooling chamber 2 from the main liquid inlet 3 is higher than the liquid level height of the coolant diverted to the first liquid separation port 6 and the second liquid separation port 7, thereby increasing the flow pressure of the liquid, so that the coolant can enter the cooling chamber 2 from the main liquid inlet 3 and flow fully in the circulation channel, thereby enhancing the flow performance of the coolant, and the coolant can be further flowed from the main liquid inlet 3 toward the first liquid separation port 6 and the second liquid separation port 7, so that the coolant can be drained and sufficient cooling can be achieved.

[0075] As a preferred embodiment, the height of the bottom wall of the cooling chamber 2 can be flush with the height of the bottom wall of the main liquid inlet 3; or, the height of the bottom wall of the cooling chamber 2 is not lower than the height of the bottom wall of the main liquid inlet 3.

[0076] It is worth noting here that the bottom wall height of the cooling chamber 2 is slightly higher than the bottom wall height of the main liquid inlet 3. The purpose is to enable the coolant to be completely discharged in the process of flowing from the cooling chamber 2 to the first water jacket chamber 4 or the second water jacket chamber 5; the bottom wall height of the cooling chamber 2 can also be flush with the bottom wall height of the main liquid inlet 3 to facilitate the coolant to enter the cooling chamber 2 from the main liquid inlet 3. With this arrangement, the coolant can be completely discharged and no water can be retained in the engine body when the engine is parked.

[0077] The present application also relates to an engine, comprising the above-mentioned engine body with a cooling structure; the engine body is a dry cylinder liner engine body, the dry cylinder liner engine body comprises a cylinder body with a plurality of cylinder holes on both sides; the inner wall of the cylinder hole is connected to the dry cylinder liner; or,

[0078] The engine body is a cylinder liner-free engine body, and the cylinder liner-free engine body comprises a cylinder body with a plurality of cylinder holes on both sides, and the inner walls of the cylinder holes are not connected with cylinder liners.

[0079] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0080] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0081] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A machine body with a cooling structure, characterized in that: The invention comprises a cylinder block having a plurality of cylinder holes on two sides; a cooling cavity (2) for installing an oil cooler is formed between the cylinder holes on the two sides, the cooling cavity (2) has a main liquid inlet (3), and a fluid channel for the circulation of coolant is formed between the oil cooler and the inner wall of the cooling cavity (2); a first water jacket cavity (4) connected to the cooling cavity (2) is provided on one side of the cooling cavity (2) around the outer periphery of the cylinder hole; and a second water jacket cavity (5) connected to the cooling cavity (2) is provided on the other side of the cooling cavity (2) around the outer periphery of the cylinder hole.

2. A machine body with a cooling structure as claimed in claim 1, characterized in that: The cooling chamber (2) is provided with a first liquid separation port (6) for connecting the first water jacket chamber (4) with the fluid channel, and a second liquid separation port (7) for connecting the second water jacket chamber (5) with the fluid channel; A first limiting belt (8) is connected to one side of the cooling chamber (2) close to the main liquid inlet (3), and a second limiting belt (9) is connected to one side of the cooling chamber (2) close to the second liquid separation port (7); the first limiting belt (8) and the second limiting belt (9) are capable of guiding the coolant so as to force the coolant to flow along the periphery of the oil cooler to cool the oil inside the oil cooler.

3. A machine body with a cooling structure as claimed in claim 2, characterized in that: A coordination chamber (10) is formed in the cooling chamber (2) on one side opposite to the main liquid inlet (3), and the coordination chamber (10) is capable of evenly distributing the cooling liquid entering the first water jacket chamber (4) and the second water jacket chamber (5); the width of the coordination chamber (10) is not less than the width of the first liquid separation port (6) or the width of the second liquid separation port (7).

4. A machine body with a cooling structure as claimed in claim 2, characterized in that: The first water jacket cavity (4) is provided with a first liquid inlet (20) connected to the first liquid separation port (6); the first liquid separation port (6) and the first liquid inlet (20) are connected to form a first guide passage (11); a slope of a preset angle is formed between the first guide passage (11) and the main liquid inlet (3); and a transition fillet is formed between the first guide passage (11) and the first water jacket cavity (4).

5. A machine body with a cooling structure as claimed in claim 4, characterized in that: The first water jacket cavity (4) comprises a plurality of first water passage cavities (13) connected in parallel; a first inter-cylinder water blocking wall (15) is formed on a side facing the inside of the machine body between two adjacent first water passage cavities (13); a first water string hole (16) capable of circulating cooling liquid between the plurality of first water passage cavities (13) is formed on one side of the first inter-cylinder water blocking wall (15); and a first inter-cylinder liquid separation port (17) is formed on a side facing the outside of the machine body between two adjacent first water passage cavities (13).

6. A machine body with a cooling structure as claimed in claim 5, characterized in that: A plurality of first upper liquid holes (18) protruding from the end of the first water passage chamber (13) are provided on one side of the first water passage chamber (13) facing the outside of the machine body, and the coolant can flow toward the cylinder head through the first upper liquid holes (18).

7. A machine body with a cooling structure as claimed in claim 6, characterized in that: The height of the bottom wall of the first inter-cylinder liquid separation port (17) is at least more than half of the height of the first water jacket cavity (4); the slope formed between the first guide passage (11) and the main liquid inlet (3) has a value ranging from 15° to 30°; and the transition radius formed between the first guide passage (11) and the first water jacket cavity (4) has a value not less than 15 mm.

8. The machine body with a cooling structure as claimed in claim 2, characterized in that: The height at which the bottom wall of the cooling chamber (2) is located can be flush with the height at which the bottom walls of the first liquid separation port (6) and the second liquid separation port (7) are located; or, the height at which the bottom wall of the cooling chamber (2) is located can be not lower than the height at which the bottom walls of the first liquid separation port (6) and the second liquid separation port (7) are located.

9. The machine body with a cooling structure according to claim 1, characterized in that: The height of the bottom wall of the cooling cavity (2) can be flush with the height of the bottom wall of the main liquid inlet (3); or, the height of the bottom wall of the cooling cavity (2) is not lower than the height of the bottom wall of the main liquid inlet (3).

10. An engine, characterized in that: A machine body with a cooling structure as claimed in any one of claims 1 to 9; the machine body is a dry liner machine body, the dry liner machine body comprises a cylinder body with a plurality of cylinder holes on both sides; the inner wall of the cylinder hole is connected to a dry cylinder liner; or, The engine body is a cylinder liner-free engine body, and the cylinder liner-free engine body comprises a cylinder body with a plurality of cylinder holes on both sides, and the inner walls of the cylinder holes are not connected with cylinder liners.

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