Multi-chamber multi-stage engine oil-gas separation device

Abstract

The present invention provides a multi-chamber multi-stage engine oil-gas separation device. The oil-gas separation device includes a cylinder block containing an oil passage and partitioning an oil-gas separation chamber, an oil-gas separation chamber partition plate containing a check valve, a condensation mesh having a function of condensing lubricating oil mist, and an oil-gas separation chamber cover plate containing an intake gas passage. The beneficial effects are as follows: After passing through the multi-chamber multi-stage engine oil-gas separation device, most of the lubricating oil mist after participating in engine lubrication is liquefied and flows back to the oil chamber, thereby greatly reducing the lubricating oil leaking out through the balance gas pipe, which can not only effectively reduce the engine oil consumption, but also reduce the emission of harmful substances from the engine.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and more particularly, to a multi-chamber multi-stage engine oil-gas separation device. Background Art

[0002] For a small four-stroke engine, after its oil chamber passes through a specific lubrication path, it is connected to the atmosphere through a balance air pipe. At the same time, to prevent the lubricating oil leaked through the balance air pipe from being directly discharged into the atmosphere, the balance air pipe is generally directly connected to the intake part of the engine, so that the lubricating oil leaked through the balance air pipe is introduced into the engine combustion chamber for combustion, thereby reducing the pollution degree of the lubricating oil to the atmosphere. However, the products after the combustion of the lubricating oil also cause a certain degree of adverse impact on the atmospheric environment. Generally speaking, the lubricating oil leaked through the balance air pipe basically all comes from the lubricating oil mist that has not been completely liquefied in the engine oil-gas separation chamber after participating in engine lubrication. Therefore, the liquefaction effect of the oil-gas separation device in the engine greatly affects the amount of oil leaked from the balance air pipe. At the same time, with the strengthening of environmental protection awareness and control at home and abroad, small four-stroke engines that more meet the environmental protection requirements are becoming more and more popular. Therefore, there is an urgent need to develop an oil-gas separation device with effective liquefaction of lubricating oil mist to reduce the consumption of engine oil, thereby reducing the emission of harmful substances from the engine. Summary of the Invention

[0003] The purpose of the present invention is to provide an oil-gas separation device for the lubrication system of a small four-stroke engine to optimize the existing technology. In the present invention, the oil-gas separation chamber contains two lubricating oil mist liquefaction chambers. The first liquefaction chamber has a multi-stage liquefaction function, and the second liquefaction chamber is formed by being separated from the first liquefaction chamber by an oil-gas separation chamber partition containing a check valve I and a check valve II. In this second liquefaction chamber, a small amount of escaped lubricating oil mist is further liquefied to ensure that most of the lubricating oil after participating in engine lubrication is liquefied and then returns to the engine lubrication cycle again, thereby reducing the consumption of engine lubricating oil.

[0004] The technical solution adopted by the present invention is:

[0005] An oil-gas separation device for engine lubricating oil mist, the oil-gas separation device is arranged on the side of the cylinder block, and the device includes a first liquefaction chamber with multi-stage liquefaction arranged inside and a second liquefaction chamber formed by being separated from the first liquefaction chamber by an oil-gas separation chamber partition containing a check valve I and a check valve II.

[0006] The described oil-gas separation device is characterized in that: the lubricating oil mist enters the first liquefaction chamber of the first liquefaction chamber from the crankcase through the intake passage at the beginning of the oil-gas separation chamber. First, the collision liquefaction method is adopted in the first liquefaction chamber, so as to effectively perform primary liquefaction on the lubricating oil mist that has participated in lubrication and is close to liquefaction.

[0007] The described oil-gas separation device is characterized in that: the lubricating oil mist enters the second liquefaction chamber and the third liquefaction chamber containing a condensation mechanism through the first liquefaction chamber in the oil-gas separation chamber for deep liquefaction. In the second liquefaction chamber and the third liquefaction chamber, most of the lubricating oil mist after lubrication is liquefied. In addition, the number of the liquefaction chambers can be increased or decreased according to the actual liquefaction requirements of the lubricating oil mist.

[0008] The described oil-gas separation device is characterized in that: at the terminal part of the oil-gas separation chamber (the third liquefaction chamber of the present invention), it is connected to the crankcase or the oil pump suction port through the first oil passage, so that through the negative pressure effect of the crankcase or the oil suction function of the oil pump, the liquefied lubricating oil mist is sucked back into the lubrication cycle of the engine for reuse.

[0009] The described oil-gas separation device is characterized in that: at the liquefaction terminal part near the first liquefaction chamber, a one-way valve one that conducts unidirectionally from the first liquefaction chamber to the second liquefaction chamber is installed on the partition plate of the oil-gas separation chamber, ensuring that the balance gas in the engine conducts unidirectionally from the first liquefaction chamber to the second liquefaction chamber, and conducting a small amount of lubricating oil mist escaping from the first liquefaction chamber into the second liquefaction chamber.

[0010] The described oil-gas separation device is characterized in that: at the liquefaction terminal part near the second liquefaction chamber, a one-way valve two that conducts unidirectionally from the second liquefaction chamber to the first liquefaction chamber is installed on the partition plate of the oil-gas separation chamber, ensuring that the balance gas in the external environment conducts unidirectionally from the second liquefaction chamber to the first liquefaction chamber. At the same time, the liquefied lubricating oil obtained by liquefying the lubricating oil mist escaping from the first liquefaction chamber is sucked back into the first liquefaction chamber and sucked back into the lubrication cycle of the engine through the oil passage connected to the crankcase or the oil pump.

[0011] The described oil-gas separation device is characterized in that the oil-gas separation chamber contains a multi-chamber and multi-stage condensation chamber, which sequentially performs collision liquefaction, condensation liquefaction and supplementary liquefaction on the lubricating oil mist. Finally, most of the lubricating oil mist after participating in the engine lubrication is liquefied and effectively sucked back into the lubrication cycle of the engine for reuse.

[0012] The described oil-gas separation device is characterized in that finally, through the gas passage added on the cover plate of the oil-gas separation chamber, it is connected to the engine intake part through the breather pipe, and a very small amount of unliquefied lubricating oil mist is subjected to secondary combustion.

[0013] The beneficial effects of the present invention are as follows. Compared with the lubricating oil path separation device of traditional small four-stroke engines, the solution of the present invention has multi-chamber and multi-stage liquefaction chambers, which can fully liquefy the lubricating oil mist after participating in engine lubrication, thoroughly solving problems such as poor lubricating oil circulation, oil-gas separation failure, oil burning, unstable performance, and poor reliability that occur when tools supporting small four-stroke engines are operating. Thus, the consumption of engine lubricating oil is greatly reduced, and furthermore, the emission of harmful substances from the engine is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is the overall schematic diagram of the present invention;

[0015] Figure 2 is the configuration diagram of a small engine adopting the present invention, which shows the basic structure of the multi-chamber and multi-stage engine oil-gas separation device on the engine;

[0016] Figure 3 is Figure 2 the partial view of D-D in [description], where the spark plug, valve chamber and other components in the valve chamber are hidden. This figure mainly shows the passage route of the lubricating oil mist entering the oil-gas separation chamber from the valve chamber;

[0017] Figure 4 is the liquefaction principle diagram of the multi-chamber and multi-stage engine oil-gas separation device of the present invention.

[0018] Explanation of the numbers in the drawings:

[0019] 1. Cylinder block; 2. Partition; 3. First condensation net; 4. Second condensation net; 5. First gasket; 6. Oil-gas separation chamber partition; 7. First check valve; 8. Second check valve; 9. Second gasket; 10. Oil-gas separation chamber cover plate; 11. First oil passage; 12. Second oil passage; 13. First liquefaction chamber; 14. Second liquefaction chamber; 15. Gas passage; 16. Third oil passage; 17. Third check valve; 18a. First liquefaction compartment; 18b. Second liquefaction compartment; 18c. Third liquefaction compartment; 19. Oil-gas separation chamber; 20. Crankshaft chamber; 21. Valve chamber; 22. Engine intake part; 23. Oil pump. DETAILED DESCRIPTION OF THE INVENTION

[0020] Such as Figures 1 to 4As shown in the figure, a multi-chamber multi-stage engine oil-gas separation device includes a cylinder block 1 containing an oil passage three 16, an oil passage one 11, an oil passage two 12, a partition 2 and an oil-gas separation chamber 19, a condensation net one 3 and a condensation net two 4 with the function of condensing lubricating oil mist, a gasket one 5 and a gasket two 9 with the sealing function, an oil-gas separation chamber partition 6 that divides the oil-gas separation chamber into two liquefaction chambers, a check valve one 7 and a check valve two 8 with the one-way conduction function, and an oil-gas separation chamber cover plate 10 containing a gas passage 15.

[0021] In the cylinder block 1 described above, the oil passage three 16 containing a check valve three 17 connects the valve chamber 21 and the crank chamber 20 ( Figure 3 ). When the engine piston moves upward, the pressure in the crank chamber 20 is negative. At this time, the lubricating oil mist in the valve chamber 21 is unidirectionally sucked back into the crank chamber 20 through the oil passage three 16 under the negative pressure of the crank chamber 20 after participating in lubrication.

[0022] In the cylinder block 1 described above, there is an oil passage two 12, which connects the crank chamber 20 and the oil-gas separation chamber 19 ( Figure 3 ). When the engine piston moves downward, the pressure in the crank chamber 20 is positive. At this time, the lubricating oil mist in the crank chamber 20 enters the oil-gas separation chamber 19 through this oil passage two 12 under the positive pressure of the crank chamber 20 for liquefaction after participating in lubrication.

[0023] The oil-gas separation chamber 19 described above is divided into a first liquefaction chamber 13 and a second liquefaction chamber 14 by an oil-gas separation chamber partition 6 containing a check valve one 7 and a check valve two 8. Among them, the check valve one 7 ensures the one-way conduction of the lubricating oil mist from the first liquefaction chamber 13 to the second liquefaction chamber 14, and the check valve two 8 ensures the one-way conduction of the lubricating oil mist from the second liquefaction chamber 14 to the first liquefaction chamber 13 ( Figure 2 ).

[0024] In the oil-gas separation chamber 19 described above, the first liquefaction chamber 13 is separated by a partition 2 into a first liquefaction compartment 18a, a second liquefaction compartment 18b, and a third liquefaction compartment 18c. Among them, the liquefaction forms of the lubricating oil mist in the first liquefaction compartment 18a are different from those in the second liquefaction compartment 18b and the third liquefaction compartment 18c ( Figure 2 , Figure 4 ). In this first liquefaction chamber 13, the lubricating oil mist entering the oil-gas separation chamber 19 from the crank chamber 20 through the oil passage two 12 is liquefied in multiple stages.

[0025] In the oil-gas separation chamber 19 described above, the first liquefaction compartment 18a adopts a hollow structure, so as to collide and liquefy the lubricating oil mist that has approached liquefaction and enters the oil-gas separation chamber 19 from the crank chamber 20 through the oil passage two 12 ( Figure 2 , Figure 4), with the aim of improving the liquefaction rate of the lubricating oil mist while enhancing the ventilation performance of the oil-gas separation chamber.

[0026] In the oil-gas separation chamber 19 described above, in the second liquefaction chamber 18b and the third liquefaction chamber 18c, a first lubricating oil mist condensation net 3 and a second condensation net 4 are built-in. In the second liquefaction chamber 18b and the third liquefaction chamber 18c, the lubricating oil mist from the first liquefaction chamber 18a is deeply liquefied ( Figure 2 , Figure 4 ), and the number of liquefaction chambers can be increased or decreased according to actual needs.

[0027] In the oil-gas separation chamber 19 described above, the seal between the first liquefaction chamber 13 and the oil-gas separation chamber partition 6 is ensured by a first gasket 5, and the seal between the second liquefaction chamber 14 and the oil-gas separation chamber partition 6 is ensured by a second gasket 9 ( Figure 1 , Figure 2 , Figure 3 ).

[0028] In the oil-gas separation chamber 19 described above, at the lubricating oil mist liquefaction terminal of the first liquefaction chamber 13 (the third liquefaction chamber 18c in the present invention), an oil passage 11 is provided and connected to the crankcase 20 or an oil pump 23 with a pumping function, so that the liquefied lubricating oil mist in the oil-gas separation chamber 19 is sucked back into the engine's lubrication cycle for reuse under the negative pressure of the crankcase 20 or the oil suction action of the oil pump 23 ( Figure 2 , Figure 4 ).

[0029] In the oil-gas separation chamber 19 described above, at the lubricating oil mist liquefaction terminal of the first liquefaction chamber 13 (the third liquefaction chamber 18c in the present invention), under the action of a one-way valve 7 installed on the oil-gas separation chamber partition 6, it conducts unidirectionally from the first liquefaction chamber 13 to the second liquefaction chamber 14. At this time, a small amount of incompletely liquefied lubricating oil mist escapes to the second liquefaction chamber 14 under the action of the balanced air flow ( Figure 2 , Figure 4 ).

[0030] In the oil-gas separation chamber 19 described above, the oil-gas separation chamber cover plate 10 is designed in a concave shape, so that the balanced gas containing from the first liquefaction chamber 13 expands freely in the second liquefaction chamber 14, thereby increasing the residence time of the balanced gas in the second liquefaction chamber 14, and further supplementing the liquefaction of a small amount of lubricating oil mist escaping from the first liquefaction chamber 13 ( Figure 4 ).

[0031] In the described oil-gas separation chamber 19, at the adjacent part of the initial liquefaction end of the second liquefaction chamber 14 to the first liquefaction chamber 13 (the first liquefaction compartment 18a in the present invention), under the action of the check valve two 8 installed on the oil-gas separation chamber partition 6, it conducts unidirectionally from the second liquefaction chamber 14 to the first liquefaction chamber 13, so as to suck back the lubricating oil mist liquefied in the second liquefaction chamber 14 to the first liquefaction chamber 13, and then return it to the engine lubrication cycle for reuse ( Figure 2 , Figure 4 ).

Claims

1. A multi-chamber multi-stage engine oil-gas separation device, including a cylinder block (1) containing an oil passage three (16), an oil passage one (11), an oil passage two (12), a partition (2) and an oil-gas separation chamber (19), an oil-gas separation chamber partition (6) containing a check valve one (7) and a check valve two (8), a condensation net one (3) and a condensation net two (4) with the function of condensing lubricating oil mist, and an oil-gas separation chamber cover plate (10) containing a gas passage (15). It is characterized in that: The oil-gas separation chamber (19) is placed on the side of the cylinder block (1). The inner cavity of the oil-gas separation chamber (19) is formed by the oil-gas separation chamber cover plate (10) and the cylinder block (1). The oil-gas separation chamber (19) is partitioned into a first liquefaction chamber (13) and a second liquefaction chamber (14) by the oil-gas separation chamber partition (6). The oil-gas separation chamber (19) is connected to the engine intake part (22) through the gas passage (15). The oil-gas separation chamber cover plate (10) adopts a concave design on the side close to the cylinder block (1). A check valve three (17) is installed in the oil passage three (16). The check valve three (17) unidirectionally conducts the valve distribution chamber (21) and the crankshaft chamber (20). The oil passage two (12) connects the crankshaft chamber and the oil-gas separation chamber. The first liquefaction chamber (13) is divided into three connected liquefaction compartments, namely a first liquefaction compartment (18a), a second liquefaction compartment (18b) and a third liquefaction compartment (18c), by the partition (2). The third liquefaction compartment is connected to an oil pump (23) through the oil passage one. A check valve one (7) is provided between the third liquefaction compartment (18c) and the second liquefaction chamber (14) on the oil-gas separation chamber partition (6). A check valve two (8) is provided between the first liquefaction compartment (18a) and the second liquefaction chamber (14) on the oil-gas separation chamber partition (6).

2. A multi-chamber multi-stage engine oil-gas separation device according to claim 1, characterized in that: No condensation mechanism needs to be built in the first liquefaction compartment (18a), and the condensation net one (3) and the condensation net two (4) are built in the second liquefaction compartment (18b) and the third liquefaction compartment (18c).

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