Water path cooling structure of engine

Abstract

The utility model discloses an engine waterway cooling structure, which is characterized in that a water pump component is mounted on the outer side of a cylinder head, a cooling water pipe of the cylinder head is connected with the water pump component, a circulating outlet of the water pump component is connected with a thermostat, a water outlet of the thermostat is connected with a water outlet pipe, and the water outlet pipe is communicated with a water inlet of a radiator; a water outlet of the radiator communicates with the water pump assembly through a water return pipe, and a pump outlet of the water pump assembly is further connected with a cooling water pipe communicating with the air cylinder body. The engine cooling system has the advantages that the thermostat is arranged in the water pump, cooling water flowing through the air cylinder body and the air cylinder head flows into the water pump after being heated, the thermostat guides water flow to enter the water pump to be heated circularly or enter the radiator to be cooled according to the water temperature, and therefore the engine is cooled, and when the water temperature is low, the cooling water can be heated rapidly, and the cooling effect is good. And when the water temperature is high, the temperature can be quickly reduced, so that the engine always works in a set temperature interval, an ideal gap is further kept between parts, and abnormal wear and impact are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling water circuit of motorcycle engine, in particular to an engine water circuit cooling structure. BACKGROUND

[0002] Thermostat is an indispensable important part of water-cooled engine, and the conventional arrangement mode is on the cylinder head. Because the size of thermostat is large, plus its external shell, it needs to occupy a large space, for the engine with large displacement, there is still space to arrange on the cylinder head, for the engine with small and medium displacement, its installation space is limited, and the thermostat cannot be arranged on the cylinder head.

[0003] The inventor designs a structure for installing the thermostat on the outside of the small-displacement engine, and according to the structure, an engine water circuit cooling structure is provided. CONTENT OF UTILITY MODEL

[0004] The utility model aims at overcoming the defects of prior art, and provides an engine water circuit cooling structure.

[0005] The utility model discloses an engine water circuit cooling structure, including engine cylinder body, the engine cylinder body installs the cylinder head, cylinder body, water pump subassembly and radiator on, the outside of cylinder head installs water pump subassembly, and the cooling water pipe of cylinder head is connected with water pump subassembly, installs the thermostat on water pump subassembly, and the water outlet of thermostat is connected with the water outlet pipe, and the water outlet pipe is communicated with the water inlet of radiator, and the water outlet of radiator is communicated with water pump subassembly through the backwater pipe, and the pump export of water pump subassembly is connected with the cooling water pipe still, and the cooling water pipe is communicated with cylinder body.

[0006] Optionally, the water pump subassembly includes a pump body and a pump cover, the pump body is installed on the side wall of the cylinder head, the pump cover is installed on the pump body, and the pump cover and the pump body form an impeller cavity therebetween, the cooling water pipe of the cylinder head is communicated with the impeller cavity in the pump body, and a water pump impeller is installed in the impeller cavity, and the water outlet of the impeller cavity is communicated with the cooling water pipe.

[0007] Optionally, a side channel communicated with the thermostat is arranged on the pump cover, and the outlet of the backwater pipe is communicated with the inner cavity of the thermostat through the side channel.

[0008] Optionally, a sealing gasket is arranged between the cylinder head and the cylinder body, the cylinder head has a first water jacket, the cylinder body has a second water jacket, a through hole is formed in the sealing gasket, and the cooling water on the second water jacket enters the water jacket of the cylinder head through the through hole in the sealing gasket.

[0009] Optionally, the radiator has an upper water chamber and a lower water chamber, the water outlet pipe is communicated with the upper water chamber, the backwater pipe is communicated with the lower water chamber, the upper water chamber and the lower water chamber are communicated through a flat tube, and the side wall of the flat tube is welded with a heat dissipation fin.

[0010] Optionally, the heat sink is made of metal foil.

[0011] Optionally, a magneto rotor is installed on the crankshaft between the heat sink and the engine, and a fan wheel is installed on the end face of the magneto rotor.

[0012] The engine waterway cooling structure has the following advantages: the engine waterway cooling structure is simple in structure, the thermostat is arranged in the water pump, the cooling water flowing through the cylinder body and the cylinder head flows into the water pump after being heated, and the thermostat guides the water flow to enter the water pump for circulation heating or enter the radiator for heat dissipation and cooling according to the water temperature, so that the cooling of the engine is realized, the cooling water can be quickly heated when the water temperature is low, the cooling water can be quickly cooled when the water temperature is high, the engine always works in the set temperature range, and thus the ideal gap between parts is maintained, and abnormal wear and impact are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The structure of the utility model is shown Figure 1 ;

[0014] Figure 2 The structure of the utility model is shown Figure 2 ;

[0015] Figure 3 The structure of the utility model is shown Figure 3 ;

[0016] Figure 4 The structure of the utility model is shown Figure 4 ;

[0017] Figure 5 The structure of the utility model is shown Figure 5 ;

[0018] Figure 6 The structure of the utility model is shown Figure 6 ;

[0019] Figure 7 is Figure 6 A-A sectional view of the utility model is shown

[0020] In the figure, 1 is a cylinder head, 2 is a cylinder body, 3 is a water pump assembly, 4 is a radiator, 5 is a thermostat, 6 is a water outlet pipe, 7 is a water return pipe, 8 is a cooling water pipe, 9 is an engine cylinder body, 11 is a pump body, 12 is a pump cover, 13 is an impeller cavity, 14 is a water pump impeller, 15 is a side channel, 16 is a sealing gasket, 17 is an upper water chamber, 18 is a lower water chamber, 19 is a flat pipe, 20 is a heat sink, 21 is a magneto rotor, 22 is a fan wheel, and 23 is a crankshaft. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] As Figures 1-6As shown, the engine water cooling structure includes an engine cylinder body 9, a cylinder head 1, a cylinder body 2, a water pump assembly 3 and a radiator 4 are installed on the engine cylinder body 9, the water pump assembly 3 is installed on the outer side of the cylinder head 1, and the cooling water pipe of the cylinder head 1 is connected with the water pump assembly 3, a thermostat 5 is installed on the water pump assembly 3, a water outlet of the thermostat 5 is connected with a water outlet pipe 6, the water outlet pipe 6 is communicated with the water inlet of the radiator 4, the water outlet of the radiator 4 is communicated with the water pump assembly 3 through a backwater pipe 7, the pump outlet of the water pump assembly 3 is also connected with a cooling water pipe 8, the cooling water pipe 8 is communicated with the cylinder body 2, after the cooling water flows through the cylinder body 2 and the cylinder head 1, the cooling water is heated to flow into the water pump assembly 3, the thermostat 5 guides the water flow to enter the water pump circulation heating or to enter the radiator 4 to be cooled and then to enter the heat source of the engine to take away the heat according to the water temperature, therefore, when the water temperature is low, the cooling water can be quickly heated, when the water temperature is high, the cooling water can be quickly cooled, the engine always works in the set temperature range, the ideal gap between the parts is kept, and abnormal wear and impact are avoided.

[0028] In the embodiment, as shown in the figure, Figures 1-6 The water pump assembly 3 includes a pump body 11 and a pump cover 12, the pump body 11 is installed on the side wall of the cylinder head 1, the pump cover 12 is installed on the pump body 11, and the impeller cavity 13 is formed between the pump cover 12 and the pump body 11, the cooling water pipe of the cylinder head 1 is communicated with the impeller cavity 13 in the pump body 11, the water pump impeller 14 is installed in the impeller cavity 13, and the water outlet of the impeller cavity 13 is communicated with the cooling water pipe 8, the cooling water closed in the water circuit is driven by the water pump impeller 14, enters the water pump outlet joint of the impeller cavity 13 under the guidance of the impeller cavity 13, and then enters the water jacket of the cylinder body 2 through the cooling water pipe 8, the cooling water flows in the water jacket of the cylinder body 2 to take away the heat on the wall of the cylinder body 2, the water temperature rises, further, the sealing gasket 16 is arranged between the cylinder head 1 and the cylinder body 2, the cylinder head 1 has a first water jacket, the cylinder body 2 has a second water jacket, the through hole is arranged on the sealing gasket 16, the cooling water on the second water jacket enters the water jacket of the cylinder head 1 through the through hole on the sealing gasket 16, the cooling water enters the first water jacket of the cylinder head 1 through the through hole on the sealing gasket 16 to take away the heat on the wall of the first water jacket of the cylinder head 1 again to make the water temperature rise again, and the heated cooling water enters the impeller cavity 13 of the water pump assembly 3 from the water outlet of the cylinder head 1.

[0029] In the embodiment, as shown in the figure, Figure 2 , Figure 3As shown, the pump cover 12 is provided with a side passage 15 in communication with the thermostat 5, and the outlet of the return water pipe 7 is communicated with the inner cavity of the thermostat 5 through the side passage 15. In the embodiment, the thermostat 5 is a commercially available product, and a valve is installed in the cavity of the thermostat 5. When the temperature rises, the paraffin filled in the thermostat 5 expands under the heat to open the valve, at this time, the inner cavity of the thermostat 5 is communicated with the outlet pipe 6, at this time, another valve on the thermostat 5 closes the side passage 15, avoiding the liquid in the inner cavity of the thermostat 5 entering the impeller cavity 13 through the side passage 15. Further, a water inlet is provided on the thermostat 5, which is communicated with the water outlet on the cylinder head 1, that is, the liquid from the cylinder head 1 enters the cavity of the thermostat 5, and then the thermostat 5 guides the water flow to enter the water pump circulation heating or the radiator 4 to be cooled, and then enters the heat source of the engine to take away the heat. Therefore, the cooling structure has two circulation passages, wherein the small circulation passage includes the cylinder block 2, the thermostat 5, the cylinder head 1 and the water pump assembly 3, the cooling water enters the cylinder head 1 from the cylinder block 2, then enters the thermostat 5 from the cylinder head 1, then enters the water pump assembly 3 through the side passage, and finally enters the cylinder block 2 through the cooling water pipe 8, thereby forming a small circulation passage. When the cooling water temperature is lower than the set stable temperature, the valve close to the outlet pipe 6 on the thermostat 5 is closed, that is, the inner cavity of the thermostat 5 is not communicated with the outlet pipe 6, and the cooling water can only enter the small circulation passage, so the cooling water is repeatedly heated, and the cooling water is quickly heated. When the cooling water temperature rises, the paraffin filled in the thermostat 5 expands under the heat to open the valve, the inner cavity of the thermostat 5 is communicated with the outlet pipe 6, and the side passage 15 is blocked, and the heated cooling water enters the large circulation passage. In the embodiment, the large circulation passage includes the water pump assembly 3, the thermostat 5, the outlet pipe 6, the radiator 4, the return water pipe 7, the water pump assembly, the cylinder head 1 and the cylinder block 2. The cooling water from the cylinder head 1 enters the cavity of the thermostat 5, then enters the radiator 4 through the outlet pipe 6, then enters the impeller cavity 13 through the return water pipe 7, and then enters the cylinder block 2 through the cooling water pipe 8 under the action of the water pump impeller 14, and then enters the cylinder head 1, and finally enters the cavity of the thermostat 5 to participate in the circulation, thereby making the cooling water circulate in the large circulation passage to continuously take away the heat of the engine, so that the engine is always in an ideal temperature state, and the engine is protected from being damaged due to high temperature.

[0030] In the embodiment, as shown in Figure 7As shown, the radiator 4 has an upper water chamber 17 and a lower water chamber 18, the outlet pipe 6 communicates with the upper water chamber 17, the return pipe 7 communicates with the lower water chamber 18, the upper water chamber 17 and the lower water chamber 18 communicate through a flat pipe 19, the side wall of the flat pipe 19 is welded with a fin 20, the cooling water first flows into the upper water chamber 17 of the radiator 4, and then flows into the flat pipe 19 connected between the upper water chamber 17 and the lower water chamber 18, when the cooling water flows through the flat pipe 19, heat is transferred to the flat pipe 19 and then to the fin 20, preferably, the fin 20 is made of metal foil, a magneto rotor 21 is installed on the crankshaft 23 between the radiator 4 and the engine, the end face of the magneto rotor 21 is installed with a fan impeller 22, the fan impeller 22 rotates with the crankshaft 23 to blow the air in the engine cylinder 9 away from the engine, a low pressure area is formed in the radiator 4, cold air flows into the radiator 4 from the gap of the fin 20 of the radiator 4 to make up, and continuously circulates, the cold air flowing through the radiator 4 fins will take away heat, thereby reducing the temperature of the flat pipe 19 and then cooling the cooling water, the cooled cooling water flows into the return pipe 7 and enters the water pump assembly 3 to be recycled again, thereby continuously taking away the heat of the engine, so that the engine is always in an ideal temperature state, and the engine is protected from loss of performance due to high temperature, and more seriously, damage to the engine.

[0031] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. An engine water passage cooling structure comprising an engine block on which a cylinder head, a cylinder block, a water pump assembly, and a radiator are mounted, characterized by: The water pump assembly is mounted on the outside of the cylinder head, and the cooling water pipe of the cylinder head is connected with the water pump assembly; a thermostat is mounted on the water pump assembly; the water outlet of the thermostat is connected with a water outlet pipe; the water outlet pipe is communicated with the water inlet of the radiator; the water outlet of the radiator is communicated with the water pump assembly through a backwater pipe; the pump outlet of the water pump assembly is also connected with a cooling water pipe; and the cooling water pipe is communicated with the cylinder block.

2. The engine water passage cooling structure according to claim 1, characterized by: The water pump assembly comprises a pump body and a pump cover; the pump body is mounted on the side wall of the cylinder head; the pump cover is mounted on the pump body, and the impeller cavity is formed between the pump cover and the pump body; the cooling water pipe of the cylinder head is communicated with the impeller cavity in the pump body; the water pump impeller is mounted in the impeller cavity; and the water outlet of the impeller cavity is communicated with the cooling water pipe.

3. The engine water jacket cooling structure according to claim 2, characterized by: The pump cover is provided with a side channel communicated with the thermostat; and the outlet of the backwater pipe is communicated with the inner cavity of the thermostat through the side channel.

4. An engine water circuit cooling structure according to any one of claims 1 to 3, characterized in that: The sealing gasket is arranged between the cylinder head and the cylinder block; the first water jacket is arranged in the cylinder head; the second water jacket is arranged on the cylinder block; the through hole is arranged on the sealing gasket; and the cooling water on the second water jacket enters the water jacket of the cylinder head through the through hole on the sealing gasket.

5. The engine water circuit cooling structure according to any one of claims 1 to 3, characterized by: The radiator has an upper water chamber and a lower water chamber; the water outlet pipe is communicated with the upper water chamber; the backwater pipe is communicated with the lower water chamber; the upper water chamber and the lower water chamber are communicated through the flat pipe; and the side wall of the flat pipe is welded with the radiating fins.

6. The engine water jacket cooling structure according to claim 5, characterized by: The radiating fins are made of metal foil.

7. The engine water jacket cooling structure according to claim 5, characterized by: The magneto rotor is mounted on the crankshaft between the radiator and the engine; and the fan impeller is mounted on the end face of the magneto rotor.

Images