CN111120042A - Engine oil-gas separation device and engine - Google Patents
Engine oil-gas separation device and engine Download PDFInfo
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- CN111120042A CN111120042A CN201911365524.XA CN201911365524A CN111120042A CN 111120042 A CN111120042 A CN 111120042A CN 201911365524 A CN201911365524 A CN 201911365524A CN 111120042 A CN111120042 A CN 111120042A
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- oil
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- gas separation
- labyrinth
- separation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/04—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil
- F01M2013/0461—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a labyrinth
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses an engine oil-gas separation device and an engine, which comprise a separation plate connected in a crankshaft cavity, wherein the separation plate separates an oil-gas separation cavity from the crankcase, a labyrinth passage is arranged in the oil-gas separation cavity, the oil-gas separation cavity is also provided with an air inlet communicated with the air inlet end of the labyrinth passage and an air outlet communicated with the air outlet end of the labyrinth passage, and the air inlet is positioned at the bottom of the oil-gas separation cavity. The labyrinth passage can increase the contact or collision area of the air flow path of the oil-gas mixture, so that the liquid substance can be condensed conveniently. The air inlet is not only a leading-in port of the oil-gas mixture, but also a return port for condensing liquid substances after the oil-gas mixture is separated, so that the return ports formed in the oil-gas separation chamber are reduced, and the risk that the oil-gas mixture returns to the crankcase through the return port in a path when the oil-gas mixture flows in the oil-gas separation chamber is reduced.
Description
Technical Field
The invention relates to the field of engines, in particular to an oil-gas separation device of an engine and the engine.
Background
The existing two-wheel and three-wheel gasoline engines have the following technical defects: because of the reciprocating motion of the piston and the characteristic of a small amount of blow-by gas at the piston, an engine breathing system (or an oil-gas separation system) must be designed on a crankcase of the piston reciprocating engine to separate oil-gas mixtures discharged from the crankcase, so that lubricating oil is condensed and reflows, and the service life of the lubricating oil is prolonged. When the engine works, a part of high-temperature and high-pressure fuel gas leaks into the crankcase through the piston ring, the fuel gas is discharged in time, lubricating oil becomes thin, the performance is deteriorated, the substances can be separated out in time after the oil-gas separation device is installed, and the consumption of the lubricating oil and the air pollution are reduced. The general oil-gas separation labyrinth design principle is that a labyrinth structure is designed on an oil-gas (lubricating oil and fuel gas) mixture discharge path, so that the contact or collision area of the oil-gas mixture and the labyrinth path is increased, and the lubricating oil is condensed and flows back; however, the flow direction of the mixed gas designed in the labyrinth and the flow direction of the condensed reflux mutually interfere in the labyrinth, which is not beneficial to the reflux of the condensed lubricating oil.
Therefore, it is urgently needed to develop an engine oil-gas separation device and an engine, which can reduce mutual interference between the flow direction of the mixed gas and the flow direction of the condensed reflux in the labyrinth and facilitate the reflux of the condensed lubricating oil.
Disclosure of Invention
In view of the above, the present invention provides an engine oil-gas separation device and an engine, which reduce mutual interference between a mixed gas flow direction and a condensation backflow flow direction in a labyrinth, and facilitate backflow of condensed lubricating oil.
The oil-gas separation device of the engine and the engine comprise a separation plate connected in a crankshaft cavity, wherein the separation plate separates an oil-gas separation cavity from the crankcase, a labyrinth passage is arranged in the oil-gas separation cavity, the oil-gas separation cavity is also provided with an air inlet communicated with an air inlet end of the labyrinth passage and an air outlet communicated with an air outlet end of the labyrinth passage, and the air inlet is positioned at the bottom of the oil-gas separation cavity. The oil-gas separation chamber is arranged above the crankcase and is beneficial to discharging gaseous substances in oil-gas mixtures, a labyrinth passage is additionally arranged to further improve the oil-gas separation quality and efficiency, an air inlet positioned at the bottom of the oil-gas separation chamber is convenient for introducing the oil-gas mixtures and separating the oil-gas mixtures, and then the lubricating oil flows back to the air inlet, and the air inlet is not only a leading-in port of the oil-gas mixtures, but also a return port for condensing the liquid substances after the oil-gas mixtures are separated.
Furthermore, the labyrinth passage is composed of a plurality of separation passages which are bent upwards along a certain direction in the oil-gas separation chamber, the separation passages are obliquely arranged along the direction approximately vertical to the airflow direction in the separation chamber, so that the condensed lubricating oil flows and gathers at the lower side approximately vertical to the airflow direction in the separation passages, and drainage holes communicated with the separation passages are formed at the lower side so that the gathered lubricating oil flows to the bottom of the oil-gas separation chamber. The separation channel bent upwards in a reciprocating mode has the functions of guiding and separating oil-gas mixtures, and can enable the oil-gas mixtures to have different gathering positions according to the principle that gaseous substances and liquid substances are different in density after being separated, so that the oil-gas mixtures can be separated conveniently, the obliquely arranged separation channel is convenient for the liquid substances in the oil-gas mixtures to flow and gather towards the lower side along a separation channel partition plate and flow back to an air inlet along a drainage hole, and the flow time of the liquid substances after being formed in the separation channel is approximately vertical to the flow direction of mixed gas; in addition, gaseous substances in the oil-gas mixture are bent and upwards gathered along the separation channel to be discharged from the gas outlet, and the flow direction of the gaseous substances and the flow direction of the liquid substances in the separation chamber are approximately vertical so as to achieve the purpose that the air flow does not interfere the liquid backflow.
Furthermore, the labyrinth passage is composed of labyrinth baffles which are arranged on the left crankcase body and the right crankcase body oppositely and are staggered up and down. The labyrinth baffles which are staggered up and down form a plurality of separating channels which are bent and bent upwards along the air inlet in a reciprocating manner after the left crankcase body and the right crankcase body are combined, so that the contact or collision area of the oil-gas mixture and the separating channels in the labyrinth channels is increased, the condensed liquid substance flows to the lower side along the side surface of the labyrinth baffle in a direction which is approximately perpendicular to the air flow direction, and the side surface of the labyrinth baffle is a surface for guiding the oil-gas mixture and condensing the liquid substance.
Furthermore, the labyrinth baffle connected to the left crankcase body is aligned with the joint surfaces of the left and right crankcase bodies at the end parts of the labyrinth baffle connected to the right crankcase body (i.e. the labyrinth baffle is close to one side of the joint surface of the left and right crankcase bodies), so that the collision area between the labyrinth baffle and the oil-gas mixture is increased to the maximum extent and the guiding effect of the labyrinth baffle on the oil-gas mixture is improved while the manufacturing difficulty of the left and right crankcase bodies is not increased, so that the separation quality efficiency of the oil-gas mixture in the oil-gas separation chamber is improved, and of course, the labyrinth baffle can also be arranged in a manner of being inserted into the relative box body, and is not repeated here. The labyrinth baffle is inclined downwards towards the joint surface, so that the drawing of a die in the processing process is facilitated, the effect of accelerating the backflow of condensed liquid substances is achieved, the labyrinth baffle connected to the left crankcase body and/or the labyrinth baffle connected to the right crankcase body are/is provided with a notch at the lower side of the joint surface at one end to form a drainage hole, and the lower side is the lower side of the joint surface approximately perpendicular to the airflow direction. The drainage holes which are formed in the lower side of the labyrinth baffle and communicated with the separation channels are convenient for accumulated lubricating oil to flow to the bottom of the oil-gas separation chamber, the condensing and refluxing speed of liquid substances in oil-gas mixtures is increased, and the drainage holes can be formed in the labyrinth baffle of the left crankcase body or the right crankcase body independently or simultaneously.
Further, the inner side surface of the partition plate connected to the lower side of the labyrinth plate approximately perpendicular to the air flow direction is inclined downward toward the air inlet side. The labyrinth baffle side face and the division plate are matched with the drainage hole to form a face convenient for backflow of condensed lubricating oil, and the face forms a flow guide face together, and the flow guide face is approximately perpendicular to the air flow direction and inclines towards the air inlet side. The flow guide surface (the side surface of the labyrinth baffle plate and the inner side surface of the partition plate) is approximately vertical to the airflow direction of the mixed gas, so that the backflow of the liquid substance in the oil-gas mixture is gathered at the lowest part of the oil-gas separation chamber, the flow guide surface and the drainage hole jointly form a liquid substance condensation backflow channel after the oil-gas mixture is separated, the condensation speed of the liquid substance is improved, the mutual interference between the flow direction of the oil-gas mixture and the flow direction of condensed lubricating oil is reduced, the air inlet at the lowest part of the bottom of the oil-gas separation chamber is opened, the oil-gas mixture is convenient to flow in, the oil-gas mixture is enabled to flow into the oil-gas separation chamber.
Furthermore, the opening direction of the gas inlet is the same as the direction of the separation channel, so that the gas inlet direction of the mixed gas is the same as the gas flowing direction in the corresponding separation channel. The air inlet which is arranged at the lowest part of the oil-gas separation chamber at the bottom of the separation channel limits the flow direction of the oil-gas mixture which flows into the oil-gas separation chamber, so that the oil-gas mixture is in the same direction as the separation channel when flowing into the oil-gas separation chamber.
Further, the exhaust port is located at the highest position of the whole oil-gas separation labyrinth. The highest positioned exhaust port facilitates the gaseous species, which have a lower density relative to the liquid species, to eventually collect at the exhaust port and exhaust.
Further, the opening direction of the air inlet and the opening direction of the air outlet are approximately vertical. The direction of the air inlet is convenient for the oil-gas mixture to flow in, and the direction of the vertical upward air inlet is approximately perpendicular to the direction of the air inlet, so that the speed of discharging gas in the oil-gas mixture is increased, and the separation of the oil-gas mixture in the oil-gas separation chamber is further accelerated.
The invention also discloses an engine, and the engine is provided with the engine oil-gas separation device.
The invention has the beneficial effects that: according to the oil-gas separation device and the engine of the engine, the crankcase and the oil-gas separation chamber isolated from the crankcase are provided, and the oil-gas separation chamber is internally provided with a labyrinth passage, an air inlet and an air outlet on an oil-gas mixture discharge path. The labyrinth structure is designed, so that the contact or collision area of the oil-gas mixture and a labyrinth path is increased, and the liquid substance is convenient to condense; and can guarantee that the liquid material flow direction after the formation in the separation channel is nearly perpendicular with the gas mixture flow direction constantly, reduce the gas mixture flow direction and flow direction of condensation backward flow and mutually interfere in labyrinth inside, do benefit to the backflow of condensation lubricating oil. The air inlet is positioned at the bottom of the oil-gas separation cavity, so that oil-gas mixture can be conveniently introduced and lubricating oil can conveniently flow back to the air inlet after the oil-gas mixture is separated, the air inlet is not only a leading-in port of the oil-gas mixture, but also a return port for condensing liquid substances after the oil-gas mixture is separated, the return port formed in the oil-gas separation cavity is reduced, and the risk that the oil-gas mixture returns to the crankcase through the return port in a path when the oil-gas mixture flows in the oil-gas separation cavity.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the left and right crank case bodies in the A-A direction after the left and right crank case bodies are combined.
FIG. 3 is a schematic illustration of an engine of the present invention
Detailed Description
FIG. 1 is a schematic structural view of the present invention, and FIG. 2 is a schematic structural view of the left and right crankcase bodies of the present invention in the direction of A-A after they are assembled. As shown in the figure: the engine oil-gas separation device and the engine of this embodiment, including connecting in the division board 5 in the bent axle cavity, division board 5 separates out the oil-gas separation cavity from the crankcase, be provided with labyrinth passageway in the oil-gas separation cavity, the air inlet 3 with labyrinth passageway inlet end intercommunication and the gas vent 4 with labyrinth passageway exhaust end intercommunication are still seted up to the oil-gas separation cavity, air inlet 3 is located oil-gas separation cavity bottom. The air inlet 3 is communicated with an exhaust port of a crankcase, and the exhaust port 4 is connected with an air inlet of an air inlet system of an engine, which is the prior art and is not described herein again. The oil-gas separation device is characterized in that the separation plate 5 is arranged on the inner side of the crankcase and is matched with the crankcase body to form an oil-gas separation chamber, the oil-gas separation chamber is arranged in the crankcase, oil-gas mixtures generated in the crankcase due to various reasons can be separated, liquid material consumption and air pollution are reduced, and the oil-gas separation chamber is arranged above the crankcase and is beneficial to discharging the liquid materials in the oil-gas mixtures. The labyrinth passage is additionally arranged to further improve the oil-gas separation quality and efficiency, the air inlet 3 is positioned at the bottom of the oil-gas separation chamber, so that the introduction of an oil-gas mixture and the backflow of a liquid substance after the separation of the oil-gas mixture to the air inlet 3 are facilitated, the air inlet 3 is not only a leading-in port of the oil-gas mixture, but also a backflow port for condensing the liquid substance after the separation of the oil-gas mixture, the backflow port arranged in the oil-gas separation chamber is reduced, and the risk that the oil-gas mixture returns to the crankcase through the backflow port in a path when the oil-gas mixture flows.
In this embodiment, the crankcase includes a left crankcase body 1 and a right crankcase body 2, the labyrinth passage is composed of a plurality of separation passages bent upward in the oil-gas separation chamber in a reciprocating manner along the joint direction of the left and right crankcase bodies, the left crankcase body 1 and the right crankcase body 2 are both provided with labyrinth baffles to form a plurality of separation passages, the separation passages bent upward in a reciprocating manner have the function of guiding and separating the oil-gas mixture to the oil-gas mixture, and further enable the gaseous substance and the liquid substance to have different gathering positions according to the principle that the density of the gaseous substance and the liquid substance is different after the oil-gas mixture is separated, so as to facilitate the separation of the oil-gas mixture, of course, the labyrinth passage can also be composed of other structures bent upward in a reciprocating manner along the direction approximately perpendicular to the joint direction of the left and right crankcase bodies in the oil-gas separation chamber, it is not repeated herein that the labyrinth passage is formed by the labyrinth baffles which are oppositely arranged on the left crankcase body 1 and the right crankcase body 2 and are staggered up and down, the labyrinth baffles which are staggered up and down form a plurality of separation passages which are bent up and down along the air inlet 3 in a reciprocating manner after the left crankcase body and the right crankcase body are combined, the contact or collision area of the oil-gas mixture and the separation passages in the labyrinth passage is increased, so that the condensed liquid substance flows along the side surface of the labyrinth baffle towards the lower side approximately perpendicular to the air flow direction, the approximately perpendicular extension means that a certain error is allowed on the basis of perpendicular opening, the specific error range is determined according to the actual manufacturing and opening error, it is not repeated herein that the side surface of the labyrinth baffle is the surface for guiding the oil-gas mixture and condensing the liquid substance, so that the generated condensed liquid is also approximately perpendicular to the flow direction of the, the interference between the condensation flow direction of the liquid substance in the oil-gas mixture and the flow direction of the oil-gas mixture is reduced, the separation channels are obliquely arranged at the bottom of the labyrinth channel along the direction approximately vertical to the airflow direction, so that the condensed liquid substance flows and gathers towards the lower side approximately vertical to the airflow direction in the labyrinth channel, and the lower side is provided with a drainage hole communicated with each separation channel so that the gathered lubricating oil flows towards the bottom of the oil-gas separation chamber. The obliquely arranged separation channel is not only convenient for the liquid substances in the oil-gas mixture to flow and gather along the separation channel partition plate to the lower side and flow back to the air inlet along the drainage hole (as shown in fig. 1, the dotted line with the arrow is the flow direction of the liquid substances in the oil-gas mixture), but also ensures that the flow direction of the liquid substances formed in the separation channel is approximately vertical to the flow direction of the mixed air at the moment (as shown in fig. 2, the dotted line with the arrow is the flow direction of the gaseous substances in the oil-gas mixture); in addition, gaseous substances in the oil-gas mixture are bent and upwards gathered along the separation channel to be discharged from the gas outlet, and the flow direction of the gaseous substances and the flow direction of the liquid substances in the separation chamber are approximately vertical so as to achieve the purpose that the air flow does not interfere the liquid backflow. The interference of the flow direction of the condensed liquid substance can be reduced in the process of forming and refluxing the condensed liquid substance, so that the oil-gas mixture basically cannot influence the reflux and the flow direction of the condensed liquid substance in the oil-gas separation process, the separation efficiency of the oil-gas mixture is improved, the condensed liquid substance is fully refluxed by liquid discharged as little as possible to a greater extent, and the oil spraying phenomenon is avoided.
In this embodiment, the labyrinth baffle connected to the left crankcase body is aligned with the joint surfaces of the left and right crankcase bodies at the end portions of the labyrinth baffle connected to the right crankcase body (i.e., the labyrinth baffle is close to the joint surface side of the left and right crankcase bodies), so that the collision area between the labyrinth baffle and the oil-gas mixture is increased to the maximum extent and the guiding effect of the labyrinth baffle on the oil-gas mixture is improved while the manufacturing difficulty of the left and right crankcase bodies is not increased, so as to improve the separation quality efficiency of the oil-gas mixture in the oil-gas separation chamber, and of course, the labyrinth baffle can also be arranged in a manner of being inserted into the inside of the relative case body, and is not repeated herein. The labyrinth baffle is inclined downwards towards the joint surface, so that the die drawing is convenient in the processing process,
and the labyrinth baffle connected to the left crankcase body and/or the labyrinth baffle connected to the right crankcase body is provided with a notch at the lower side of the joint surface to form a drainage hole, and one end of the joint surface is at the lower side approximately perpendicular to the airflow direction. The drainage holes which are formed in the lower side of the labyrinth baffle and communicated with the separation channels are convenient for collected lubricating oil to flow to the bottom of the oil-gas separation chamber, the condensing and refluxing speed of liquid substances in oil-gas mixtures is increased, the drainage holes can be formed in the labyrinth baffle of the left crankcase body or the right crankcase body independently or can be formed in the left crankcase body and the right crankcase body simultaneously, and the description is omitted. The inner side of the partition plate connected to the lower side of the labyrinth plate approximately perpendicular to the air flow direction is inclined downward toward the air inlet side. The inner side surface of the isolation plate is a contact surface of the isolation plate and an oil-gas mixture, the side surface of the labyrinth baffle and the inner side surface of the isolation plate are matched with the drainage hole to form a surface convenient for backflow of condensed lubricating oil, and the surfaces form a flow guide surface together, and are approximately perpendicular to the air flow direction and inclined towards the air inlet side. The flow guide surface (the side surface of the labyrinth baffle plate and the inner side surface of the partition plate) is approximately vertical to the airflow direction of the mixed gas, so that liquid substances in the oil-gas mixture flow back and gather at the lowest part of the oil-gas separation chamber, the flow guide surface and the drainage holes jointly form a liquid substance condensation backflow channel after the oil-gas mixture is separated, the connection line of the drainage holes penetrates through the flowing direction of the oil-gas mixture in the labyrinth, the condensation speed of the liquid substances is improved, the mutual interference between the flowing direction of the oil-gas mixture and the flowing direction of condensed lubricating oil is reduced, the mutual interference is that the flowing direction of the oil-gas mixture is the same as the flowing direction of the condensed liquid substances, the force applied by the oil-gas mixture airflow to the condensed liquid substances is generated, the condensed liquid substances are forced to flow back to the exhaust port, and the oil-gas mixture is enabled to flow into the oil-gas separation chamber from the lowest part, so that the condensed liquid substance after the oil-gas mixture is separated can be conveniently refluxed. The water conservancy diversion face has the inclination of the back liquid material backward flow of oil-gas separation of being convenient for of backward flow passageway direction, because the back liquid material of oil-gas mixture separation need rely on self gravity gliding to backflow channel, the design inclination is convenient for quick to the liquid material of condensation flow back, improves the speed that liquid material flows back to gas vent 4.
In the embodiment, the plurality of labyrinth baffles form a plurality of separation channels communicated with each other in the oil-gas separation chamber, the separation channels are flat chambers, two labyrinth baffles, namely a labyrinth baffle VI 6 and a labyrinth baffle VII 7, are arranged on the left crankcase body 1, three separation channels, namely a separation channel I8, a separation channel II 9 and a separation channel III 10 are formed, three labyrinth baffles, namely a labyrinth baffle I11, a labyrinth baffle II 12 and a labyrinth baffle III 13, are arranged on the right crankcase body 2, four oil-gas separation channels, namely a separation channel IV 14, a separation channel VI 15, a separation channel VII 16 and a separation channel VIII 17 are formed, the separation channels are all arranged in the left crankcase body and the right crankcase body, when the left crankcase body and the right crankcase body are combined, the labyrinth baffles correspond to the separation channels of the opposite crankcase bodies, and the labyrinth baffle VI 6 corresponds to the separation channel VI 15, Labyrinth baffle VII 7 corresponds separation channel VII 16, labyrinth baffle I11 corresponds separation channel I8, labyrinth baffle II 12 corresponds separation channel II 9 and labyrinth baffle III 13 corresponds separation channel III 10, certainly also can prolong labyrinth baffle along labyrinth baffle length direction, make the labyrinth baffle on the left and right crankcase insert the chamber that corresponds each other, further make labyrinth baffle interactive arrangement, or with means such as other buckles, the increase is to the guide effect and the condensation of oil gas mixture, no longer describe here any more.
In this embodiment, the labyrinth baffle connects the partition plate 501 and the top surface 51 of the oil-gas separation chamber disposed opposite to the partition plate 501, and is disposed in an inclined manner, and approximately parallel to the partition plate 502, the approximately parallel extension means that a certain error is allowed on the basis of parallel arrangement, a specific error range is determined according to actual manufacturing and arrangement errors, which is not described herein any more, the lower side of the labyrinth baffle is connected to the partition plate 501 disposed in an inclined manner, so as to increase the condensation speed of the liquid substance, the oil-gas mixture has the liquid substance continuously condensed in the oil-gas separation chamber when flowing through the separation channel, and the liquid substance slides down to the flow guide surface along the side surface of the labyrinth baffle due to the gravity of the liquid substance and the gaseous substance due to different densities, and the flow direction of the condensed liquid substance is approximately perpendicular to the flow direction of the oil-gas mixture in the process of the liquid substance, the mutual interference between the flow direction of the condensed liquid substance and the flow direction of the oil-gas mixture is reduced, the backflow of the condensed liquid substance is accelerated, the side surface of the labyrinth baffle is a surface for guiding the oil-gas mixture and condensing the liquid substance, then the liquid substance is converged in the backflow channel through the obliquely arranged flow guide surface, finally the condensed backflow liquid substance is recycled through backflow from the backflow channel, the utilization rate of the liquid substance is improved, simultaneously, the content of liquid substances in the oil-gas mixture is reduced, the pollution degree of the discharged gas is reduced, the backflow channel is arranged on one side of the flow guide surface, so that the reflux channel is always positioned at the lowest position of reflux of the condensed liquid substance, the reflux of the condensed liquid substance is convenient, the condensation speed of the liquid substance is improved, the liquid substance condensation channel in the oil-gas mixture is approximately vertical to the gas flow direction of the oil-gas mixture, and the mutual interference between the gas flow direction of the oil-gas mixture and the flow direction of the condensed liquid substance is reduced.
In this embodiment, 3 lowest departments of air inlet are return flow channel's terminal, the return flow channel terminal is provided with the inclination that is convenient for the liquid material backward flow. An air inlet 3 arranged at the lowest part of the bottom of the oil-gas separation chamber is convenient for the oil-gas mixture to flow in, and the oil-gas mixture is enabled to flow into the oil-gas separation chamber from the lowest part, the utilization rate of the oil-gas separation chamber is improved, and the reflux terminal arranged at the lowest part of the air inlet 3 is beneficial to the reflux of the condensed liquid substance after the separation of the oil-gas mixture at the lowest part, the gas inlet 3 is arranged at the bottom of the separation channel, the gas inlet 3 arranged at the lowest part of the oil-gas separation chamber at the bottom of the separation channel further limits the flow direction of the oil-gas mixture flowing into the oil-gas separation chamber, the opening direction of the gas inlet 3 is the same as the arrangement direction of the separation channels so that the gas inlet direction of the mixed gas is the same as the gas flowing direction in the corresponding separation channels, and the gas inlet is arranged at the bottom of the oil-gas separation chamber in the embodiment, so that the corresponding separation channels are the separation channels positioned at the lowest part of the oil-gas separation chamber; the air inlet 3 is arranged at the lowest part of the oil-gas separation cavity at the bottom of the separation channel, the flow direction of the oil-gas mixture flowing into the oil-gas separation cavity is limited, the oil-gas mixture is enabled to be in the same direction as the separation channel when flowing into the oil-gas separation cavity, the effect of guiding the flow direction of the oil-gas mixture can be effectively achieved, the air inlet 3 is arranged at the bottom of the separation channel VIII 17, the opening direction faces towards the separation channel III 10, the oil-gas mixture sequentially flows into the separation channels along the labyrinth baffle and collides with the bottoms of the separation channels when flowing into the separation channel VIII 17, the effect of colliding and condensing liquid substances in the oil-gas mixture is achieved, the flow speed of the oil-gas mixture in the oil-gas separation cavity is reduced, the oil-gas mixture stays in the oil-gas separation cavity for a long time, the oil-gas mixture separation efficiency is improved, and the oil, the phenomenon that the separation efficiency of the oil-gas mixture is affected by untimely condensation, incomplete condensation and the like of liquid substances in the oil-gas mixture can occur if the retention time of the oil-gas mixture in the oil-gas separation chamber is too short, the separation efficiency of the oil-gas mixture is reduced, and the bottom of the oil-gas separation chamber is the inner wall of the oil-gas separation chamber far away from the closed surface of a left box body and a right box body.
In this embodiment, the exhaust port 4 is located at the highest position of the whole oil-gas separation chamber. The exhaust port 4 is arranged at the top of the separation channel IV 14, the opening direction of the exhaust port 4 is approximately vertically upward, the approximately vertical extension means that a certain error is allowed to exist on the basis that the opening direction of the exhaust port 4 is vertically opened, a specific error range is determined according to actual manufacturing and opening errors, and is not described herein any more, and the exhaust port at the highest position is beneficial to enabling gaseous substances with lower density relative to liquid substances to finally collect in the exhaust port 4 and be discharged.
In this embodiment, the opening direction of the air inlet 3 and the opening direction of the air outlet 4 are approximately perpendicular. The direction of the air inlet is convenient for the oil-gas mixture to flow in, and the direction of the vertical upward air inlet approximately perpendicular to the direction of the air inlet prevents the condensed liquid from being sprayed out, so that the separation efficiency of the oil-gas mixture in the oil-gas separation chamber is further improved.
The invention also discloses an engine, as shown in figure 3, the engine is provided with the oil-gas separation device of the engine, the oil-gas separation device teaches separation efficiency and discharges liquid substances in oil-gas mixture as little as possible, the oil-gas separation device enables the oil-gas mixture to collide and condense in the oil-gas separation chamber and enables the wall surface to participate in the condensation of the liquid substances in the oil-gas mixture, when mixed gas flows in the chamber, the mixed gas continuously collides with the bottom of each separation channel so that the oil-gas mixture can stay in the oil-gas separation chamber for a long time, the oil-gas mixture separation efficiency is improved, and the flow guide surface is approximately vertical to the flow direction of the oil-gas mixture, and simultaneously, condensed liquid generated on the side surface of a labyrinth baffle is approximately vertical to the flow direction of the oil-gas mixture, so that the condensation flow direction, accelerate the condensation of liquid material among the oil-gas mixture, the backward flow design of condensation liquid material, be the backward flow speed that increases condensation liquid material like water conservancy diversion face, backward flow passageway, reduction interference etc. prevent that condensation liquid material from excessively depositing the collection in oil-gas separation device, deposit the collection too much and also have the oil spout risk to reduce to interfere not only the division board backward flow and exist, exist equally when labyrinth baffle forms the condensate liquid simultaneously, during the use air inlet 3 and gas vent 4 all set up on right crankcase body 2, are convenient for to the manufacturing of crankcase body, this engine only changes the oil-gas separation device structure, other structures are prior art, no longer describe herein.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. The utility model provides an engine oil-gas separation device which characterized in that: including connecting in the division board in the bent axle cavity, the division board separates out the oil-gas separation cavity from the crankcase in, be provided with labyrinth passageway in the oil-gas separation cavity, the air inlet that communicates with labyrinth passageway inlet end and the gas vent that communicates with labyrinth passageway exhaust end are still seted up to the oil-gas separation cavity, the air inlet is located oil-gas separation cavity bottom.
2. The engine oil-gas separation device according to claim 1, characterized in that: the labyrinth passage is composed of a plurality of separation passages which are bent upwards along a certain direction in the oil-gas separation chamber, the separation passages are obliquely arranged along the direction approximately vertical to the airflow direction in the separation chamber, so that condensed lubricating oil flows and gathers at the lower side approximately vertical to the airflow direction in the separation passages, and drainage holes communicated with the separation passages are formed at the lower side so that the gathered lubricating oil flows to the bottom of the oil-gas separation chamber.
3. The engine oil-gas separation device according to claim 2, characterized in that: the labyrinth passage is composed of labyrinth baffles which are arranged on the left crankcase body and the right crankcase body oppositely and are staggered up and down.
4. The engine oil-gas separation device according to claim 2, characterized in that: the direction of the opening of the air inlet is the same as the direction of the separation channel, so that the air inlet direction of the mixed gas at the air flow inlet is the same as the flowing direction of the gas in the corresponding separation channel.
5. The engine oil-gas separation device according to claim 3, characterized in that: the labyrinth baffle connected to the left crankcase body is aligned with the end part of the labyrinth baffle connected to the right crankcase body at the joint surface of the left and right crankcase bodies, and the labyrinth baffle connected to the left crankcase body and/or the labyrinth baffle connected to the right crankcase body are/is provided with a notch at the lower side of the joint surface to form a drainage hole.
6. The engine oil-gas separation device according to claim 5, wherein: the inner side of the partition plate connected to the lower side of the labyrinth plate approximately perpendicular to the air flow direction is inclined downward toward the air inlet side.
7. The engine oil-gas separation device according to claim 1, characterized in that: the exhaust port is located at the highest position of the whole oil-gas separation labyrinth.
8. The engine oil-gas separation device according to claim 1, characterized in that: the opening direction of the air inlet and the opening direction of the air outlet are approximately vertical.
9. An engine, characterized in that: the engine adopts the oil-gas separation device of the engine as claimed in any one of claims 1 to 8.
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| CN201911365524.XA CN111120042B (en) | 2019-12-26 | 2019-12-26 | Engine oil-gas separation device and engine |
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| CN113958384A (en) * | 2021-10-19 | 2022-01-21 | 重庆隆鑫发动机有限公司 | Tricycle engine and engine crankcase |
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| CN111120042B (en) | 2022-06-03 |
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