Novel main bearing bush pre-lubricating structure

Abstract

The invention discloses a novel main bearing bush pre-lubricating structure, and relates to the technical field of engine lubrication. And the lubricating assembly is arranged on the outer side of the machine body and used for lubricating a bearing bush in the machine body. According to the novel main bearing bush pre-lubricating structure, the pre-oil supply pump is adopted to directly suck oil from the side face of the oil pan, so that redundant components such as an engine oil cooler and a main oil duct in a traditional structure are omitted, and the total volume of the interior of parts where lubricating oil flows through is reduced; the lubricating oil can be conveyed to the main bearing bush only by arranging one pre-supply oil pump; the problem that the oil shortage time of the crankshaft and the bearing bush is too long when the engine is started is effectively solved, the occurrence frequency of the serious fault that the crankshaft bites the bearing bush is reduced, and the operation reliability and the service life of the engine are remarkably improved; meanwhile, redundant parts are omitted, and the lubricating assembly is directly fixed on the outer side of the machine body, so that the number of pipeline connections and assembly procedures are reduced, and the equipment manufacturing cost and the assembly complexity are reduced.

Description

Technical Field

[0001] This invention relates to the field of engine lubrication technology, and in particular to a novel pre-lubrication structure for main bearing bushes. Background Technology

[0002] During engine operation, the lubrication effect of the main bearing and crankshaft directly affects the engine's operational reliability and service life. Therefore, the main bearing pre-lubrication system is a key component of the engine. Its core function is to quickly deliver lubricating oil to the main bearing during engine startup to prevent friction damage to the crankshaft and main bearing due to lack of oil.

[0003] like Figure 12 and Figure 13 As shown, in the prior art, the pre-lubrication of engine main bearings usually adopts a traditional oil pump driven structure. Its working principle and structural characteristics are as follows: the oil pump delivers lubricating oil from the front of the engine. The lubricating oil needs to flow through multiple components such as the oil pump, oil cooler, oil filter, distributor, and main oil passage before reaching the main bearing to achieve lubrication of the crankshaft. Due to the influence of this flow path design, the traditional pre-lubrication system has the characteristics of large pipe diameter, long pipe length, and large internal cavity volume. In addition, the total internal volume of all components through which the lubricating oil flows in the traditional structure can reach 130L. In order to meet the lubricating oil delivery requirements, two oil pumps with a flow rate of 110L / min are required for the system. Even so, it still takes as long as 35 seconds for the lubricating oil to be delivered from the pre-supply pump to the main bearing.

[0004] However, during the implementation of the above technical solution, at least the following technical problems were discovered:

[0005] The existing main bearing pre-lubrication structure suffers from long lubrication time and low oil supply efficiency. During operation, the lubricating oil takes too long to reach the main bearing, resulting in a prolonged period of insufficient lubrication between the crankshaft and the main bearing during engine startup. This can easily lead to serious crankshaft seizure, damaging engine components and significantly reducing engine reliability and lifespan. Furthermore, to compensate for the large system cavity and low oil supply efficiency, multiple high-flow pre-lubrication pumps are required, increasing manufacturing costs and assembly complexity, which is detrimental to engine cost control and lightweight design. Therefore, we propose a novel main bearing pre-lubrication structure. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a novel pre-lubrication structure for main bearing bushes, solving the technical problems of long lubricating oil delivery time and low oil supply efficiency in the use of existing pre-lubrication structures for main bearing bushes.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A novel pre-lubrication structure for main bearing bushes, comprising:

[0011] Organism;

[0012] The lubrication assembly, located on the outside of the machine body, is used to lubricate the bearings inside the machine body;

[0013] The lubrication assembly includes a second filter for filtering engine oil. The inlet and outlet of the second filter are connected to the engine block and the oil pan at the bottom of the engine block, respectively. The engine oil stored inside the oil pan enters the engine block through the second filter and is transported to the crankshaft along the guide channel inside the engine block to lubricate the bearings on the outside of the crankshaft.

[0014] Preferably, the lubrication assembly further includes a pre-supply pump connected to the second filter, which delivers the engine oil stored in the oil pan to the second filter, and the engine oil filtered by the second filter is then delivered to the interior of the machine body by the conveyor.

[0015] Preferably, the oil inlet of the pre-supply pump is connected to an oil inlet pipe, and the other end of the oil inlet pipe is connected to the outer wall of the oil pan. One end of the oil inlet pipe that extends into the oil pan is connected to the oil suction pipe inside the oil pan, and the end of the oil suction pipe that is away from the oil inlet pipe extends to the inner bottom surface of the oil pan. The engine oil enters the oil inlet pipe through the oil suction pipe and is then transported to the pre-supply pump by the oil inlet pipe.

[0016] Preferably, the conveying component includes multiple transition joints, and the transition joints correspond one-to-one with the guide channels on the machine body. Adjacent transition joints are connected by a connecting pipe. One of the connecting pipes is connected to a connector and is connected to the outlet of filter two through the connector. The oil is conveyed to each transition joint through the connecting pipe.

[0017] Preferably, the connecting pipe corresponds one-to-one with the piston on the machine body, and the transition joint corresponds to the position on the machine body near the edge of the piston;

[0018] The end of the connecting pipe is fitted with a sealing ring, which is located in the gap between the connecting pipe and the transition joint when the connecting pipe is inserted into the transition joint.

[0019] Preferably, the outer wall of the transition joint is provided with a connecting head, and the transition joint is inserted into the guide channel on the outer wall of the machine body through the connector. The connecting head is connected to the center of the transition joint. The oil enters the transition joint through the connecting pipe, and then the oil is delivered into the machine body through the connecting head on the transition joint.

[0020] Preferably, both the second filter and the pre-supply pump are fixed to the outer wall of the machine body by bolts, and the second filter is located below the pre-supply pump.

[0021] (III) Beneficial Effects

[0022] 1. By employing a pre-supply oil pump to draw oil directly from the side of the oil pan, coupled with a small-capacity filter and small-diameter delivery pipelines, redundant components such as the oil cooler, distributor, and main oil passage in traditional structures are eliminated, reducing the total internal volume of the components through which the lubricating oil flows. Furthermore, only one pre-supply oil pump is needed to deliver lubricating oil to the main bearings. This effectively solves the problem of prolonged oil shortage time for the crankshaft and bearings during engine startup in traditional structures, fundamentally reducing the frequency of serious crankshaft seizure failures and significantly improving engine reliability and service life. Simultaneously, by eliminating components such as the oil cooler and distributor, and with the lubrication components directly bolted to the outside of the engine block, the number of pipeline connections and assembly steps are reduced, lowering equipment manufacturing costs and assembly complexity. In addition, the simplified structure and small-capacity component design better meet the demands of lightweight engine development, avoiding the increased overall weight caused by long pipelines and numerous components in traditional structures.

[0023] 2. One end of the oil suction pipe extends to the bottom of the oil pan, ensuring that the pre-supply pump can fully draw oil from the oil pan and avoid oil supply interruption due to insufficient oil suction; a dedicated filter is installed to filter the oil, preventing impurities from entering the internal guide channels and bearing clearances of the engine block, thus avoiding bearing wear caused by oil contamination; the transition joints in the delivery components correspond one-to-one with the engine block guide channels, and the end of the connecting pipe is fitted with a sealing ring, which can effectively seal the connection gap, prevent oil leakage, and ensure that the oil is accurately delivered to the crankshaft bearing position; at the same time, the design of the connecting pipe corresponding one-to-one with the engine block piston and the transition joint corresponding to the edge position of the engine block piston can achieve uniform oil supply to the bearing, further ensuring the lubrication effect.

[0024] 3. By fixing the pre-supply pump and filter two to the outside of the machine body with bolts, and with filter two located below the pre-supply pump, this arrangement does not occupy the core space inside the machine body, and facilitates the operator to disassemble, repair and replace the pre-supply pump and filter two. Attached Figure Description

[0025] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Figure 1 This is an overall structural diagram of an embodiment of the present invention;

[0027] Figure 2This is a side view of the overall structure in an embodiment of the present invention;

[0028] Figure 3 This is a structural diagram of the lubrication assembly in an embodiment of the present invention;

[0029] Figure 4 This is a cross-sectional view of the overall structure in an embodiment of the present invention;

[0030] Figure 5 This is a structural diagram of the oil suction pipe in an embodiment of the present invention;

[0031] Figure 6 This is a structural diagram of the oil inlet pipe in an embodiment of the present invention;

[0032] Figure 7 This is a structural diagram of the pre-supply oil pump in an embodiment of the present invention;

[0033] Figure 8 This is a structural diagram of filter two in an embodiment of the present invention;

[0034] Figure 9 This is a structural diagram of the connecting pipe and connector in an embodiment of the present invention;

[0035] Figure 10 This is a structural diagram of the transition joint in an embodiment of the present invention;

[0036] Figure 11 This is a structural diagram of the second oil outlet pipe in an embodiment of the present invention;

[0037] Figure 12 This is a cross-sectional view of the overall structure in the comparative example of the present invention;

[0038] Figure 13 This is a side view of the overall structure in the comparative example of the present invention.

[0039] Legend:

[0040] 11. Engine block; 12. Oil pan; 13. Oil pump; 14. Oil chamber; 15. Distribution unit; 16. Cooler; 17. Filter 1; 18. Main oil passage; 19. Crankshaft;

[0041] 2. Lubrication components; 21. Pre-supply oil pump; 22. Filter II; 23. Oil inlet pipe; 24. Oil outlet pipe I; 25. Conveying components; 251. Connecting pipe; 252. Transition joint; 253. Oil outlet pipe II; 254. Connector; 26. Suction pipe. Detailed Implementation

[0042] This application provides a novel pre-lubrication structure for main bearings, effectively solving the technical problems of long lubricating oil delivery time and low oil supply efficiency in existing pre-lubrication structures. By employing a pre-supply pump to directly draw oil from the side of the oil pan, coupled with a small-capacity filter and a small-diameter delivery pipeline, redundant components such as the oil cooler, distributor, and main oil passage in traditional structures are eliminated, reducing the total internal volume of the components through which the lubricating oil flows. Furthermore, only one pre-supply pump is needed to deliver lubricating oil to the main bearing, effectively solving the problem of... This design eliminates the problem of prolonged oil shortage time for the crankshaft and bearings during engine startup in traditional structures, fundamentally reducing the frequency of serious crankshaft bearing seizure and significantly improving engine reliability and service life. Simultaneously, by eliminating components such as the oil cooler and distributor, and with the lubrication components directly bolted to the outside of the engine block, the number of pipe connections and assembly steps is reduced, lowering equipment manufacturing costs and assembly complexity. Furthermore, the simplified structure and small-volume component design better meet the demands of lightweight engine development, avoiding the increased overall weight caused by long pipes and numerous components in traditional structures.

[0043] Example: The technical solution in this application example effectively solves the technical problems of long lubricating oil delivery time and low oil supply efficiency in the use of existing main bearing pre-lubrication structures. The overall idea is as follows:

[0044] To address the problems existing in the prior art, this invention provides a novel pre-lubrication structure for main bearing shells. This pre-lubrication structure mainly consists of two parts: a lubrication component 2 and a filter structure. The filter structure is used to filter impurities in the oil to be transported and is located on the outside of the engine for easy observation, replacement, and repair. The conveying structure is used to transport the oil. It mainly transports the oil from the oil pan 12 to the filter structure, and then the oil filtered by the filter structure is transported to the crankshaft 19 inside the engine, thereby lubricating the bearing shells on the outside of the crankshaft 19. This process involves direct extraction from the oil pan 12 and direct transport through the conveying structure, with minimal intermediate steps. Therefore, it can stably and quickly deliver the oil to the engine, thereby timely lubricating the bearing shells inside the engine, improving lubrication efficiency, and avoiding the technical problems of long oil delivery time and low oil supply efficiency. Details are as follows:

[0045] The engine is mainly divided into a body 11 and an oil pan 12 installed at the bottom of the body 11. The crankshaft 19 is installed inside the body 11, and the bearing is located between the body 11 and the crankshaft 19. The inside of the oil pan 12 is used to store engine oil so that the subsequent conveying structure can provide a source for the delivery of engine oil.

[0046] Filter structure, as Figure 1 and Figure 3The filter 22 shown is the main filter for filtering the engine oil flowing through it, thereby preventing impurities deposited inside the engine oil from affecting subsequent lubrication. In order for the engine oil to enter the filter 22, it is necessary to provide power for the delivery of the engine oil. That is, a pre-supply oil pump 21 is installed outside the engine body 11. The pressure generated by the movement of the oil pump delivers the engine oil stored in the oil pan 12 to the filter 22 so that the filter 22 can filter the engine oil. The filtered engine oil is then squeezed into the engine body 11 for subsequent lubrication.

[0047] The conveying structure uses pipelines to connect filter 22 and pre-supply pump 21, filter 22 and engine block 11, and pre-supply pump 21 and oil pan 12. Both filter 22 and pre-supply pump 21 have inlets and outlets. The inlet of filter 22 is connected to the inside of oil pan 12 via inlet pipe 23, facilitating oil entry into filter 22 from inlet pipe 23. The outlet of filter 22 is connected to outlet pipe 24, which connects filter 22 and pre-supply pump 21. Outlet pipe 24 is a U-shaped pipe structure and connects to the inlet of pre-supply pump 21, delivering the oil filtered by filter 22 to pre-supply pump 21. Figure 3 As shown, the conveyor 25 is connected to the outlet of the pre-supply oil pump 21. The conveyor 25 needs to ensure that the filtered oil is stably and accurately delivered to the corresponding bearing locations. Multiple transition joints 252 are used as the connection structure between the device and the machine body 11, and the number of transition joints 252 corresponds one-to-one with the guide channels on the machine body 11, such as... Figure 4 As shown, the guide channel is a passage extending from the body 11 to the crankshaft 19, and adjacent transition joints 252 are connected by connecting pipes 251, one of which is connected to a connector 254, as shown. Figure 9 As shown, the oil outlet pipe 253 connects the connector 254 to the outlet of the filter 22, so that the oil can enter the connecting pipe 251 along the oil outlet pipe 253. Then the connecting pipe 251 delivers the oil to each transition joint 252, thereby delivering the oil to each guide channel outside the engine block 11. Guided by the guide channel, the oil is delivered to the crankshaft 19 and lubricates the bearings on the crankshaft 19.

[0048] The other end of the oil inlet pipe 23 on the pre-supply pump 21 is connected to the outer wall of the oil pan 12, and the end of the oil inlet pipe 23 that extends into the oil pan 12 is connected to the oil suction pipe 26 inside the oil pan 12. The end of the oil suction pipe 26 that is away from the oil inlet pipe 23 extends to the inner bottom surface of the oil pan 12. In this way, the engine oil can enter the oil inlet pipe 23 through the oil suction pipe 26, and then be transported to the pre-supply pump 21 by the oil inlet pipe 23.

[0049] like Figure 3 and Figure 4 As shown, the connecting pipe 251 corresponds one-to-one with the piston on the body 11, and the transition joint 252 corresponds to the position of the body 11 near the piston edge; the end of the connecting pipe 251 is fitted with a sealing ring, and when the connecting pipe 251 is inserted into the transition joint 252, the sealing ring is located in the gap between the connecting pipe 251 and the transition joint 252, thereby sealing the gap between the connecting pipe 251 and the transition joint 252; wherein, the outer wall of the transition joint 252 has a connecting head, and the transition joint 252 is inserted into the guide channel on the outer wall of the body 11 through the connector, and the connecting head and the center of the transition joint 252 are connected, so that the engine oil can enter the transition joint 252 through the connecting pipe 251, and then the engine oil is delivered into the body 11 through the connecting head on the transition joint 252, thereby completing the supply of engine oil.

[0050] In the specific implementation process, the pre-supply pump 21 is turned on. Due to the negative pressure generated by the pre-supply pump 21, the oil suction pipe 26 is inserted into the oil pan 12 and corresponds to the oil in the oil pan 12. Therefore, under the action of negative pressure, the oil enters the oil inlet pipe 23 connected to it through the oil suction pipe 26. Since the oil inlet pipe 23 is connected to the oil inlet of the filter 22 and the oil outlet of the filter 22 is connected to the pre-supply pump 21 through the oil outlet pipe 24, the oil entering the oil inlet pipe 23 is transported to the filter 22 through the oil inlet pipe 23. The filter 22 then filters the impurities in the oil. After the filtration is completed, the oil is then transported to the engine body 11 through the pre-supply pump 21.

[0051] The internal structure of the fuselage 11 is equipped with a guide channel, which extends from the outside of the fuselage 11 to the location of the crankshaft 19, such as... Figure 4 As shown, by installing the transition joint 252 on the outside of the body 11 at a position corresponding to the guide channel, and then connecting two adjacent transition joints 252 together using a connecting pipe 251, a structure is formed as shown. Figure 3 The pre-supply pump 21 is connected to the connector 254 outside one of the connecting pipes 251 via the oil outlet pipe 253. In this way, the oil can enter the connecting pipe 251 along the oil outlet pipe 253 under the power of the pre-supply pump 21, and be transported to the guide channels through the connecting pipes 251. Finally, the oil enters the engine block 11 through the guide channels to lubricate the bearings on the crankshaft 19.

[0052] Comparative Example: The embodiments of this application disclose existing bearing lubrication structures and are compared with the embodiments. The overall idea is as follows:

[0053] like Figure 12 and Figure 13As shown, in a traditional bearing lubrication structure, an oil pump 13 mounted on an oil pan 12 pumps oil from a connector inside the oil pan 12 to the upper body 11. The oil is then transported through an oil chamber 14 on the body 11 to a distribution body 15 at the top of the body 11, until it reaches a cooler 16 at the top of the body 11 to cool the oil. The cooled oil then enters a filter 17, where it is filtered to remove impurities. After filtration, the oil flows back to the distribution body 15 and is then transported by the main oil passage 18 on the distribution body 15 to the crankshaft 19 located inside the body 11.

[0054] Its working principle and structural features are as follows: The oil pump 13 delivers lubricating oil from the front end of the engine. The lubricating oil needs to flow through multiple components such as the oil pump 13, oil cooler 16, oil filter 17, distributor 15, and main oil passage 18 before reaching the main bearing to lubricate the crankshaft 19. Due to the design of this flow path, the traditional pre-lubrication system has the characteristics of large pipe diameter, long pipe length, and large internal cavity volume. In addition, the total internal volume of all components through which the lubricating oil flows in the traditional structure can reach 130L. In order to meet the lubricating oil delivery requirements, two oil pumps 13 with a flow rate of 110L / min need to be configured for the system. Even so, it still takes as long as 35 seconds for the lubricating oil to be delivered from the pre-supply pump 21 to the main bearing.

[0055] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A novel pre-lubricating structure for main bearing bushes, characterized in that, The structure includes: Body (11); The lubrication assembly (2) is located on the outside of the body (11) and is used to lubricate the bearings inside the body (11); The lubrication assembly (2) includes a filter two (22) for filtering engine oil. The inlet and outlet of the filter two (22) are connected to the engine body (11) and the oil pan (12) at the bottom of the engine body (11), respectively. The engine oil stored inside the oil pan (12) enters the engine body (11) through the filter two (22) and is transported to the crankshaft (19) along the guide channel inside the engine body (11) to lubricate the bearings outside the crankshaft (19).

2. The novel pre-lubricated structure for main bearing bushes as described in claim 1, characterized in that: The lubrication assembly (2) also includes a pre-supply pump (21) connected to the filter two (22). The pre-supply pump (21) delivers the engine oil stored inside the oil pan (12) to the filter two (22). The engine oil filtered by the filter two (22) is then delivered to the interior of the machine body (11) by the conveyor (25).

3. The novel pre-lubricating structure for main bearing bushes as described in claim 2, characterized in that: The pre-supply pump (21) has an oil inlet pipe (23) connected to its oil inlet. The other end of the oil inlet pipe (23) is connected to the outer wall of the oil pan (12) and extends into the oil pan (12). One end of the oil inlet pipe (23) that extends into the oil pan (12) is connected to the oil suction pipe (26) inside the oil pan (12). The end of the oil suction pipe (26) that is away from the oil inlet pipe (23) extends to the inner bottom surface of the oil pan (12). The engine oil enters the oil inlet pipe (23) through the oil suction pipe (26) and is then transported to the pre-supply pump (21) by the oil inlet pipe (23).

4. The novel pre-lubricating structure for main bearing bushes as described in claim 3, characterized in that: The conveying component (25) includes multiple transition joints (252), and the transition joints (252) correspond one-to-one with the guide channels on the body (11). Adjacent transition joints (252) are connected by connecting pipes (251). One of the connecting pipes (251) is provided with a connector (254), and the connector (254) is connected to the outlet of the second filter (22). The oil is conveyed to each transition joint (252) through the connecting pipe (251).

5. The novel pre-lubricating structure for main bearing bushes as described in claim 4, characterized in that: The connecting pipe (251) corresponds one-to-one with the piston on the body (11), and the transition joint (252) corresponds to the position of the body (11) near the piston edge; The end of the connecting pipe (251) is fitted with a sealing ring. When the connecting pipe (251) is inserted into the transition joint (252), the sealing ring is located in the gap between the connecting pipe (251) and the transition joint (252).

6. The novel pre-lubricating structure for main bearing bushes as described in claim 5, characterized in that: The outer wall of the transition joint (252) is provided with a connecting head, and the transition joint (252) is connected to the guide channel on the outer wall of the machine body (11) through the connector. The connecting head is connected to the center of the transition joint (252). The oil enters the transition joint (252) through the connecting pipe (251) and is then transported to the inside of the machine body (11) through the connecting head on the transition joint (252).

7. The novel pre-lubricating structure for main bearing bushes as described in claim 2, characterized in that: The filter 2 (22) and the pre-supply pump (21) are both fixed to the outer wall of the machine body (11) by bolts, and the filter 2 (22) is located below the pre-supply pump (21).

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