Supercharger lubricating system and engine

Abstract

The utility model provides a supercharger lubricating system and an engine, and belongs to the technical field of power mechanical equipment. The supercharger lubricating system comprises a supercharger, a lubricating system and a lubricating system, wherein the supercharger comprises an oil inlet and an oil outlet; the oil inlet end of the first oil channel communicates with the oil outlet, and the height of the oil outlet end of the first oil channel is not smaller than that of the oil inlet in the vertical direction. According to the supercharger lubricating system, it is guaranteed that engine oil is always kept in the supercharger lubricating oil channel according to the communicating vessel principle, and the lubricating and cooling conditions of the supercharger are maintained.

Description

Technical Field

[0001] This application belongs to the technical field of power mechanical equipment, and particularly relates to a supercharger lubrication system and an engine. Background Art

[0002] A supercharger is a device used to increase the intake air density of an internal combustion engine, and its main purpose is to increase the power output and efficiency of the engine. By compressing air, the supercharger allows more air to be filled into the engine cylinders, thereby allowing more fuel to be burned, thus increasing the output power of the engine.

[0003] In related technologies, when the engine starts, the engine oil has not yet reached the supercharger. At this time, due to the lack of lubrication, the operating environment of the supercharger friction pair is relatively harsh, and it is easy to cause wear and even damage to components. In addition, when the engine stops, the oil pump also stops running and the oil supply stops, but the rotor of the supercharger will continue to rotate for a period of time due to inertia. Therefore, during this period, the supercharger will experience insufficient lubrication and local overheating. Utility Model Content

[0004] To solve at least one aspect of the technical problems in the background art, this application provides a supercharger lubrication system, which uses the principle of communicating vessels to ensure that there is always engine oil in the supercharger lubricating oil passage, maintaining the lubrication and cooling conditions of the supercharger.

[0005] The second aspect embodiment of this application provides an engine.

[0006] The technical solution adopted by this application is as follows:

[0007] The first aspect embodiment of this application provides a supercharger lubrication system, including:

[0008] A supercharger, the supercharger includes an oil inlet and an oil outlet;

[0009] A first oil passage, the oil inlet end of the first oil passage is communicated with the oil outlet, and along the vertical direction, the height of the oil outlet end of the first oil passage is not lower than the height of the oil inlet.

[0010] According to the supercharger lubrication system provided by the first aspect of the present application, when the engine is running, the oil pump continuously delivers oil into the system. The oil flows into the supercharger through the oil inlet, then flows out through the oil outlet and enters the first oil passage, and finally flows out from the oil outlet end of the first oil passage. When the engine stops running, the oil pump stops delivering oil. Since the height of the oil outlet end of the first oil passage in the vertical direction is not lower than the height of the oil inlet, a communicating vessel structure is formed between the first oil passage and the supercharger. At this time, the liquid level height of the oil in the first oil passage gradually levels with the liquid level height of the oil at the supercharger oil inlet or before the oil inlet. After leveling, the oil will not continue to be discharged. Therefore, oil remains in the supercharger and the first oil passage, so it can continue to provide lubrication and cooling for the supercharger. When the engine starts again, since the inside of the supercharger has always been filled with oil, this part of the oil meets the operating requirements of the supercharger under the starting conditions and provides lubrication and cooling for the supercharger. In summary, the supercharger lubrication system provided by the first aspect of the present application uses the principle of the communicating vessel to ensure that oil always remains in the supercharger lubricating oil passage, maintaining the lubrication and cooling conditions of the supercharger.

[0011] According to an embodiment of the present application, the volume V of the first oil passage satisfies V≥ΔQ / (c*ρ*Δt);

[0012] where c represents the specific heat capacity of the oil, ρ represents the density of the oil, ΔQ represents the heat dissipation of the supercharger, and Δt represents the temperature difference of the oil before and after the supercharger dissipates heat.

[0013] According to an embodiment of the present application, the outer wall of the first oil passage is provided with heat dissipation fins.

[0014] According to an embodiment of the present application, the oil passage of the first oil passage is bent.

[0015] According to an embodiment of the present application, the shape of the oil passage of the first oil passage is Z-shaped, S-shaped or U-shaped.

[0016] According to an embodiment of the present application, the supercharger lubrication system further includes an oil inlet passage and a second oil passage. The oil inlet end of the oil inlet passage is connected to the oil pump, the oil outlet end of the oil inlet passage is connected to the oil inlet, and the oil inlet end of the second oil passage is connected to the oil inlet passage. Among them, the connection position of the oil inlet end of the second oil passage and the oil inlet passage is located between the oil pump and the oil inlet;

[0017] The second oil passage is provided with a pressure relief valve. When the oil pressure in the second oil passage reaches the threshold value of the pressure relief valve, the pressure relief valve opens to make the second oil passage conduct, so as to divert the oil in the oil inlet passage, and the diverted oil is discharged from the oil outlet end of the second oil passage.

[0018] According to an embodiment of the present application, the supercharger lubrication system further includes an oil sump, the oil outlet end of the first oil passage communicates with the oil sump, and the oil outlet end of the second oil passage communicates with the oil sump.

[0019] According to an embodiment of the present application, the supercharger lubrication system further includes an oil sump, the oil outlet end of the first oil passage communicates with the second oil passage, and the oil outlet end of the second oil passage communicates with the oil sump;

[0020] Wherein, the connection position of the first oil passage and the second oil passage is located between the pressure relief valve and the oil sump.

[0021] According to an embodiment of the present application, the pressure relief valve includes a spring type pressure relief valve or a lever type pressure relief valve.

[0022] An embodiment of the second aspect of the present application provides an engine, including the supercharger lubrication system in any one of the above embodiments of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the supercharger lubrication system provided by an embodiment of the present application;

[0025] Figure 2 is a schematic structural diagram of the first oil passage provided by an embodiment of the present application.

[0026] Wherein,

[0027] 11. Supercharger; 12. First oil passage; 121. Heat sink; 122. Oil passage; 13. Oil inlet passage; 14. Second oil passage; 141. Pressure relief valve; 15. Oil pump; 16. Oil sump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the drawings of the specification.

[0029] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0030] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0031] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can 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 referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0033] As Figures 1 to 2 shown, an embodiment of the first aspect of the present application provides a supercharger lubrication system, including a supercharger 11 and a first oil passage 12. The supercharger 11 includes an oil inlet and an oil outlet; the inlet end of the first oil passage 12 is connected to the oil outlet, and along the vertical direction, the height of the outlet end of the first oil passage 12 is not lower than the height of the oil inlet.

[0034] Engine oil enters the supercharger 11 from the oil inlet, is used to lubricate and cool components such as bearings and rotors inside the supercharger 11, and the engine oil after participating in lubrication and cooling flows out from the oil outlet and enters the first oil passage 12. The first oil passage 12 can be directly connected to the oil pan 16 to discharge the engine oil into the oil pan 16, or can be connected to other oil passage systems.

[0035] According to the supercharger lubrication system provided by the first aspect embodiment of the present application, when the engine is running, the oil pump 15 continuously delivers oil into the system. The oil flows into the supercharger 11 from the oil inlet, then flows out from the oil outlet and enters the first oil passage 12, and finally flows out from the outlet end of the first oil passage 12. When the engine stops running, the oil pump 15 stops delivering oil. Since the height of the outlet end of the first oil passage 12 in the vertical direction is not lower than the height of the oil inlet, a communicating vessel structure is formed between the first oil passage 12 and the supercharger 11. At this time, the liquid level height of the oil in the first oil passage 12 gradually levels with the liquid level height of the oil at the supercharger 11 oil inlet or before the oil inlet. After leveling, the oil will not continue to drain. Therefore, there will still be oil remaining in the supercharger 11 and the first oil passage 12, so it can continue to provide lubrication and cooling for the supercharger 11. When the engine starts again, since the inside of the supercharger 11 has always been filled with oil, this part of the oil meets the operating requirements of the supercharger 11 under the starting condition and provides lubrication and cooling for the supercharger 11. In summary, the supercharger lubrication system provided by the first aspect embodiment of the present application uses the principle of communicating vessels to ensure that there is always oil in the lubricating oil passage of the supercharger 11 and maintains the lubrication and cooling conditions of the supercharger 11.

[0036] In some embodiments of the present application, the volume V of the first oil passage 12 ≥ ΔQ / (c*ρ*Δt); where c represents the specific heat capacity of the oil, ρ represents the density of the oil, ΔQ represents the heat dissipation of the supercharger 11, and Δt represents the temperature difference of the oil before and after the supercharger 11 dissipates heat. The volume V of the first oil passage 12 meets the heat dissipation conditions of the supercharger 11 and is used to determine the required volume of the first oil passage 12 to ensure that the supercharger 11 can be properly lubricated and cooled under various operating conditions. By ensuring that the first oil passage 12 has sufficient volume, the system can more effectively control the temperature of the supercharger 11 and avoid damage caused by overheating.

[0037] As Figure 2 shown, in some embodiments of the present application, heat dissipation fins 121 are provided on the outer wall of the first oil passage 12. The heat dissipation fins 121 can improve the cooling efficiency of the oil after the engine stops, so that when the engine starts again, oil at a more suitable temperature can be provided to the supercharger 11, ensuring the lubrication and cooling effects of the supercharger 11. The heat dissipation fins 121 are provided on the outer wall of the first oil passage 12, which can increase the contact area between the outer wall of the first oil passage 12 and the surrounding air, promote heat exchange, and accelerate heat dissipation. Since the first oil passage 12 contains high-temperature oil flowing out from the supercharger 11, the presence of the heat dissipation fins 121 can help the outer wall transfer heat to the external environment faster. Especially when the engine stops and the oil pump 15 stops working and the active cooling mechanism fails, the passive cooling of the heat dissipation fins 121 does not require an additional power source, reducing energy consumption.

[0038] The heat sink 121 can also be cooled by a water cooling method.

[0039] As Figures 1 to 2 shown, in some embodiments of the present application, the oil passage 122 of the first oil passage 12 is bent. The bent passage increases the flow distance and time of the engine oil in the first oil passage 12, which enables the engine oil to contact the wall surface of the oil passage 122 of the first oil passage 12, thereby improving the heat exchange efficiency. The bent passage can help regulate the oil pressure and flow rate by changing the direction and speed of the oil flow, prevent the sudden change of the oil pressure from impacting the supercharger 11, and at the same time ensure a stable oil flow supply under various working conditions. In addition, within the limited space of the engine compartment, the bent passage design can enable the first oil passage 12 to better adapt to the complex mechanical layout, avoid interference with other components, and at the same time ensure the connectivity and functionality of the oil passage. Further, in some embodiments of the present application, the shape of the oil passage 122 of the first oil passage 12 is Z-shaped, S-shaped or U-shaped.

[0040] As Figure 1As shown, in some embodiments of the present application, the supercharger lubrication system further includes an oil inlet passage 13 and a second oil passage 14. The oil inlet end of the oil inlet passage 13 is connected to the oil pump 15, and the oil outlet end of the oil inlet passage 13 is connected to the oil inlet. The oil inlet end of the second oil passage 14 is connected to the oil inlet passage 13. Among them, the connection position of the oil inlet end of the second oil passage 14 and the oil inlet passage 13 is located between the oil pump 15 and the oil inlet. A pressure relief valve 141 is provided in the second oil passage 14. When the oil pressure in the second oil passage 14 reaches the threshold value of the pressure relief valve 141, the pressure relief valve 141 opens to conduct the second oil passage 14, so as to divert the engine oil in the oil inlet passage 13, and the diverted engine oil is discharged from the oil outlet end of the second oil passage 14. One end of the oil inlet passage 13 is connected to the oil pump 15, and the other end is connected to the oil inlet of the supercharger 11, responsible for directly guiding the engine oil transported by the oil pump 15 to the supercharger 11 to provide lubrication and cooling for the moving parts of the supercharger 11. The second oil passage 14 is connected in parallel to the oil inlet passage 13 and is connected at a certain point between the oil inlet passage 13 and the oil inlet of the supercharger 11. Therefore, the oil pressure in the second oil passage 14 is equal to that in the oil inlet passage 13. When the second oil passage 14 is opened, a part of the engine oil will be diverted to this oil passage to reduce the oil pressure in the oil inlet passage 13. A pressure relief valve 141 is installed on the second oil passage 14. The pressure relief valve 141 is a pressure control device that can monitor the oil pressure in the oil circuit. When the oil pressure exceeds the set safety threshold, the pressure relief valve 141 will automatically open to conduct the second oil passage 14, and the engine oil in the oil inlet passage 13 will be discharged from the oil outlet end of the second oil passage 14 to release the excess oil pressure, keeping the oil pressure in the oil inlet passage 13 within a safe range, ensuring that the supercharger 11 obtains an appropriate lubrication pressure, and avoiding damage or leakage of the seals in the supercharger 11 due to excessive oil pressure. It should be noted that under normal circumstances, that is, when the oil pressure in the oil inlet passage 13 is less than the threshold value of the pressure relief valve 141, the pressure relief valve 141 is in a closed state, and the engine oil flows through the oil inlet passage 13 to the supercharger 11. Through the coordinated work of the oil inlet passage 13, the second oil passage 14 and the pressure relief valve 141, the supercharger lubrication system realizes the effective management and regulation of the oil pressure, ensuring that the supercharger 11 can be properly lubricated and protected under various conditions, thereby improving the overall performance and durability of the engine.

[0041] In addition, in the connection oil circuit structure between the oil pump 15 and the supercharger 11, an oil cooler and an oil filter can also be provided. The function of the oil cooler is to reduce the temperature of the engine oil to avoid the engine oil overheating and losing its lubricating effect. The oil filter is used to filter impurities in the engine oil to ensure the cleanliness of the engine oil, thereby reducing the wear of the supercharger lubrication system and the internal parts of the engine and extending the life of the engine.

[0042] In some embodiments of the present application, the supercharger lubrication system further includes an oil pan 16. The oil outlet end of the first oil passage 12 communicates with the oil pan 16, and the oil outlet end of the second oil passage 14 communicates with the oil pan 16. The oil pan 16 is responsible for collecting and storing engine oil, and is also the oil suction source of the oil pump 15. The connection between the oil pan 16 and the first oil passage 12 and the second oil passage 14 forms a closed-loop engine oil circulation system, ensuring the effective utilization of engine oil and the normal operation of the system.

[0043] The first oil passage 12 carries the engine oil flowing out from the supercharger 11, and the second oil passage 14 serves as a pressure relief passage when the oil pressure is too high to divert the excess engine oil. Since both of them communicate with the oil pan 16 respectively, during both the normal lubrication process and the oil pressure regulation, the engine oil can smoothly return to the oil pan 16 without accumulation or blockage.

[0044] As Figure 1 shown, in some embodiments of the present application, the supercharger lubrication system further includes an oil pan 16. The oil outlet end of the first oil passage 12 communicates with the second oil passage 14, and the oil outlet end of the second oil passage 14 communicates with the oil pan 16; wherein, the connection position between the first oil passage 12 and the second oil passage 14 is located between the pressure relief valve 141 and the oil pan 16. The oil outlet end of the first oil passage 12 directly communicates with the second oil passage 14 instead of directly connecting to the oil pan 16. When the second oil passage 14 does not need to relieve pressure, the engine oil flowing out from the supercharger 11 will first pass through the first oil passage 12 and then continue to enter the oil pan 16 through the second oil passage 14. When the second oil passage 14 relieves pressure, the engine oil in the first oil passage 12 and the second oil passage 14 is mixed and enters the oil pan 16. The high-temperature engine oil in the first oil passage 12 can be appropriately cooled after being mixed with the low-temperature engine oil in the second oil passage 14, so as to maintain the best performance of the engine oil.

[0045] In some embodiments of the present application, the pressure relief valve 141 includes a spring-loaded pressure relief valve or a lever-type pressure relief valve. The spring-loaded pressure relief valve responds very quickly to pressure changes, can quickly open and close, ensuring timely and accurate pressure relief. It can also set the opening pressure of the pressure relief valve 141 by adjusting the pre-tightening force of the spring, with high flexibility. The lever-type pressure relief valve has good working performance in the stable state and is suitable for high-pressure and large-flow oil circuits.

[0046] An embodiment of the second aspect of the present application provides an engine, including the supercharger lubrication system in any embodiment of the first aspect above.

[0047] The engine in the embodiments of the present application can be a gasoline engine, a diesel engine, a liquefied petroleum gas engine, etc. The embodiments of the present application do not make specific limitations in this regard.

[0048] According to the engine provided by the second aspect embodiment of the present application, it includes a supercharger lubrication system. When the engine is running, the oil pump 15 continuously transports oil into the system. The oil flows into the interior of the supercharger 11 from the oil inlet, then flows out from the oil outlet and enters the first oil passage 12, and finally flows out from the oil outlet end of the first oil passage 12. When the engine stops running, the oil pump 15 stops transporting oil. Since the height of the oil outlet end of the first oil passage 12 in the vertical direction is not lower than the height of the oil inlet, a communicating vessel structure is formed between the first oil passage 12 and the supercharger 11. At this time, the liquid level height of the oil in the first oil passage 12 gradually levels with the liquid level height of the oil at the supercharger 11 oil inlet or before the oil inlet. After leveling, the oil will not continue to drain. Therefore, oil will still remain in the supercharger 11 and the first oil passage 12, so it can continue to provide lubrication and cooling for the supercharger 11. When the engine starts again, since the interior of the supercharger 11 has always been filled with oil, this part of the oil meets the operating requirements of the supercharger 11 under the starting condition and provides lubrication and cooling for the supercharger 11. In summary, the engine provided by the second aspect embodiment of the present application can ensure that oil always remains in the lubricating oil passage of the supercharger 11, maintain the lubrication and cooling conditions of the supercharger 11, and the engine has a long service life.

[0049] What is not described in this application can be implemented by adopting or referring to the existing technology.

[0050] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

[0051] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A supercharger lubrication system, characterized in that, Comprising: A supercharger (11), the supercharger (11) including an oil inlet and an oil outlet; A first oil passage (12), an oil inlet end of the first oil passage (12) being communicated with the oil outlet, and in a vertical direction, a height of an oil outlet end of the first oil passage (12) being not lower than a height of the oil inlet.

2. The supercharger lubrication system according to claim 1, characterized in that, A volume V of the first oil passage (12) satisfies V≥ΔQ / (c*ρ*Δt); Wherein, c represents specific heat capacity of engine oil, ρ represents density of engine oil, ΔQ represents heat dissipation of the supercharger (11), and Δt represents a temperature difference of the engine oil before and after heat dissipation of the supercharger (11).

3. The supercharger lubrication system according to claim 2, characterized in that, A heat sink (121) is arranged on an outer wall of the first oil passage (12).

4. The supercharger lubrication system according to claim 1, characterized in that, An oil passage (122) of the first oil passage (12) is bent.

5. The supercharger lubrication system according to claim 4, wherein The oil passage (122) of the first oil passage (12) has a shape of Z-shaped, S-shaped or U-shaped.

6. The supercharger lubrication system according to any one of claims 1 to 5, characterized in that, The supercharger lubrication system further includes an oil inlet passage (13) and a second oil passage (14), an oil inlet end of the oil inlet passage (13) being communicated with an oil pump (15), an oil outlet end of the oil inlet passage (13) being communicated with the oil inlet, an oil inlet end of the second oil passage (14) being communicated with the oil inlet passage (13), wherein a communication position between the oil inlet end of the second oil passage (14) and the oil inlet passage (13) is located between the oil pump (15) and the oil inlet; A pressure relief valve (141) is arranged on the second oil passage (14), wherein when an oil pressure in the second oil passage (14) reaches a threshold value of the pressure relief valve (141), the pressure relief valve (141) is opened to conduct the second oil passage (14) so as to divert engine oil in the oil inlet passage (13), and the diverted engine oil is discharged from an oil outlet end of the second oil passage (14).

7. The supercharger lubrication system according to claim 6, characterized in that, The supercharger lubrication system further includes an oil pan (16), an oil outlet end of the first oil passage (12) being communicated with the oil pan (16), and an oil outlet end of the second oil passage (14) being communicated with the oil pan (16).

8. The supercharger lubrication system according to claim 6, wherein, The supercharger lubrication system further includes an oil pan (16), an oil outlet end of the first oil passage (12) being communicated with the second oil passage (14), and an oil outlet end of the second oil passage (14) being communicated with the oil pan (16); Wherein, a communication position between the first oil passage (12) and the second oil passage (14) is located between the pressure relief valve (141) and the oil pan (16).

9. The supercharger lubrication system according to claim 6, wherein, The pressure relief valve (141) includes a spring type pressure relief valve or a lever type pressure relief valve.

10. An engine, characterized in that, Comprising the supercharger lubrication system according to any one of claims 1 to 9.

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