CN112901311B - A negative pressure oil-gas separation device - Google Patents
A negative pressure oil-gas separation device Download PDFInfo
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- CN112901311B CN112901311B CN202110299903.4A CN202110299903A CN112901311B CN 112901311 B CN112901311 B CN 112901311B CN 202110299903 A CN202110299903 A CN 202110299903A CN 112901311 B CN112901311 B CN 112901311B
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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
- F01M2013/0438—Crankcase ventilating or breathing having means for purifying air before leaving crankcase, e.g. removing oil with a filter
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
本发明涉及一种负压式油气分离装置，解决了现有国内外同类技术的不足，技术方案为：包括壳体、出气管、盖板、隔板、滤网和集油器，壳体的上部侧壁开设有进气口，壳体的下端开设有回油口，壳体内部被滤网分割为滤前腔体和滤后腔体，壳体下部设置有集油器，盖板上开设有空气补偿进口，隔板的上表面向上凸起形成挡圈，隔板与盖板之间的空腔被挡圈分割成为外空腔和内空腔，外空腔对应滤网位置开设有引入向下的滤网空气补偿孔，内空腔开设有引入向下的压差补偿孔，滤网的上表面与隔板的下表面抵接，滤网的下表面与集油器的上表面抵接，出气管伸入滤网内侧集油器的U型圈内，集油器内部开设有集油室，集油器对应滤网的下表面开设有集油孔，集油孔与集油室连通。
The invention relates to a negative pressure oil-gas separation device, which solves the shortcomings of existing similar technologies at home and abroad. The technical scheme is as follows: the device comprises a shell, an air outlet pipe, a cover plate, a partition plate, a filter screen and an oil collector. An air inlet is provided on the upper side wall of the shell, an oil return port is provided on the lower end of the shell, the interior of the shell is divided into a pre-filter cavity and a post-filter cavity by the filter screen, an oil collector is arranged at the lower part of the shell, an air compensation inlet is provided on the cover plate, the upper surface of the partition plate protrudes upward to form a retaining ring, the cavity between the partition plate and the cover plate is divided into an outer cavity and an inner cavity by the retaining ring, a filter air compensation hole for introducing downward is provided in the outer cavity corresponding to the position of the filter screen, a pressure difference compensation hole for introducing downward is provided in the inner cavity, the upper surface of the filter screen abuts against the lower surface of the partition plate, the lower surface of the filter screen abuts against the upper surface of the oil collector, the air outlet pipe extends into a U-shaped ring of the oil collector inside the filter screen, an oil collecting chamber is provided inside the oil collector, an oil collecting hole is provided on the lower surface of the oil collector corresponding to the filter screen, and the oil collecting hole is connected with the oil collecting chamber.
Description
Technical Field
The invention relates to an oil-gas separation device, in particular to a negative pressure type oil-gas separation device.
Background
As is well known, engine oil is contained in mixed gas discharged from a crankcase of an internal combustion engine, and the mixed gas can be adsorbed on all parts of the internal combustion engine in the recycling combustion process to form carbon deposit, so that the working performance of the internal combustion engine is reduced, the abrasion of the internal combustion engine and the waste of engine oil are accelerated, the working efficiency of the engine is reduced, the service life is shortened, and more harmful gas is discharged to pollute the environment. Therefore, to recover the engine oil in the mixed gas, an oil-gas separation device, for example, an oil-gas separation device with the patent number 95218800.7 is designed, a spiral separation tube is arranged on a closed shell, the mixed gas discharged from a crankcase is injected onto the separation tube, the engine oil is temporarily adhered to the separation tube and flows out along the separation tube, the utility model has simple structure, but only can separate the large-particle drop engine oil and has no good separation effect on mist engine oil, and an oil-gas separation device (patent number 97202028.4) of a diesel engine is designed, which is provided with an upper box body, a lower box body, a mandrel and a filter disc, a spacer between the filter discs and a filter screen device. Other oil-gas separation devices such as maze and negative pressure control are designed, but the technical problems that the crankcase pressure cannot be regulated and balanced, the vaporous engine oil cannot be separated sufficiently and efficiently and the like exist, a filter screen is easy to block, the service life is short, and the technical requirements of various periods and various working conditions of an internal combustion engine cannot be met. When the oil-gas separation device is completely disabled due to the blockage of the filter screen, a user cannot find and clean the oil-gas separation device in time, so that the damage of the internal combustion engine is very easy to cause, and great loss is caused to the user.
Disclosure of Invention
Aiming at the technical problems of high crankcase pressure, kinetic energy consumption (oil consumption), low oil-gas separation efficiency, high engine oil consumption, potential safety hazard, short service life, incapability of adapting to the development requirement of emission regulations and the like in the prior art, the invention provides the negative pressure type oil-gas separation device which can effectively reduce the crankcase pressure (oil saving), improve the oil-gas separation efficiency, greatly reduce the engine oil consumption and carbon deposition, has a self-cleaning function under the condition of no moving part, aging part and fatigue part, and is safe and reliable to use and long in service life. To meet the requirements of the emission regulations of state six and above. Responding to national energy conservation and emission reduction strategies.
The invention solves the technical problems by adopting the technical proposal that the negative pressure type oil-gas separation device comprises a shell, an air outlet pipe, a cover plate, a baffle plate, The oil collecting device comprises a filter screen and an oil collector, wherein an air inlet is formed in the side wall of the upper portion of the shell, an oil return port is formed in the lower end of the shell, the interior of the shell is divided into a cavity before filtering and a cavity after filtering by the filter screen, the oil collector is arranged on the lower portion of the shell, an air compensation inlet is formed in the cover plate, the upper surface of the partition plate protrudes upwards to form a retainer ring, a cavity between the partition plate and the cover plate is divided into an outer cavity and an inner cavity by the retainer ring, an air compensation hole for introducing the filter screen downwards is formed in the outer cavity, an air compensation hole for introducing the pressure difference downwards is formed in the inner cavity, the upper surface of the filter screen is in butt joint with the lower surface of the partition plate, the lower surface of the filter screen is in butt joint with the upper surface of the oil collector, an air outlet pipe stretches into the inner side of the filter screen, an oil collecting chamber is formed in the interior of the oil collector, and the oil collecting hole is communicated with the oil collecting chamber. According to the invention, the oil gas is firstly subjected to primary centrifugal separation through a labyrinth after entering from an air inlet, then enters a filter screen for adhesive separation, and the compensation air enters the filter screen and a cavity after filtering through an air compensation hole on a partition plate to form the intersection and cooling of two gas flows, so that the separation effect of the filter screen is improved, when the compensation air enters the filter screen under the action of negative pressure, the downward flowing speed of engine oil can be accelerated due to the fact that the flowing direction of the air is consistent with the gravity direction of engine oil, the filter screen is prevented from being saturated by engine oil, the trafficability of the crankcase mixed gas on the filter screen is improved, on the other hand, the air intersection technology and the filter screen technology are combined, engine oil particles with smaller particle sizes can be intercepted, and the separation efficiency of the engine oil gas can be greatly improved under the condition of the same density filter screen. the baffle plate is provided with a baffle ring, the baffle ring is provided with a flow limiting compensation hole, the baffle ring is used for preventing engine oil from being sucked back from the upper part of the baffle plate, the baffle ring is provided with a flow limiting compensation hole for compensating air in the inner cavity, after air is introduced, under the negative pressure effect at the bottom end of the air outlet pipe, the air moves downwards from the pressure difference compensation hole to form an air wall effect, the pressure difference between the cavity before filtration and the cavity after filtration is improved, meanwhile, the liquid engine oil is blocked from moving to the air outlet pipe, the oil collector is used for collecting and refluxing engine oil on the filter screen, during operation, the oil collector is used for introducing negative pressure from the negative pressure through hole to form negative pressure in the oil collecting chamber, the engine oil moves downwards to the oil collecting hole to enter the oil collecting chamber under the effect of the negative pressure, and the oil return passage balance hole is arranged to enable the oil return passage to flow back, the negative pressure values of the pre-filtering cavity and the oil collecting chamber are kept relatively balanced, so that liquid engine oil collected in the oil collecting chamber is facilitated to naturally flow back through the oil hole and the oil return hole. On the other hand, the air entering from the air compensation hole and the pressure difference compensation hole is converged with the filtered crankcase gas mixture, and flows upwards along the air outlet pipe under the action of negative pressure at the bottom of the air outlet pipe until being sucked out of the air outlet. According to the invention, the flow direction of gas is changed, the effects of compensating gas cooling and separating oil and gas are realized by utilizing the negative pressure separation principle, the separation effect is excellent, meanwhile, the liquid engine oil adhered to the bottom of the filter screen is forcedly absorbed through the oil collector, the liquid engine oil is prevented from being sucked out of the air outlet pipe, the separation efficiency and the service life of the filter screen are greatly improved, and the effect of life use is achieved.
Preferably, an oil collector supporting seat is arranged on the inner wall of the lower part of the inner side of the shell upwards, and the oil collector is erected on the oil collector supporting seat.
Preferably, the oil collector comprises a filter screen supporting seat, an oil collector conical part and a U-shaped ring which are integrally formed, the oil collector conical part is positioned below the middle part of the filter screen supporting seat, an oil collecting chamber is formed inside the filter screen supporting seat and the oil collector conical part, a circle of oil collecting holes are formed in positions, corresponding to the filter screen, of the filter screen supporting seat, one end of each oil collecting hole is communicated with the filter screen, and the other end of each oil collecting hole is communicated with the oil collecting chamber. The oil collecting holes are abutted against the bottom of the filter screen, and liquid engine oil attached to the filter screen is sucked through the action of negative pressure, so that the liquid engine oil can quickly enter the oil collector from the oil collecting holes.
Preferably, the bottom of the inner side of the U-shaped ring is provided with an oil collector negative pressure through hole, and the hole wall of the oil collector negative pressure through hole is downwards protruded to form a boss for blocking liquid oil from being sucked back. Thus, the negative pressure of the air outlet pipe and the filtered cavity is introduced into the oil collecting chamber through the negative pressure through hole, so that the oil collecting chamber forms negative pressure, and then the liquid engine oil adhered to the bottom of the filter screen is collected through the oil collecting hole.
Preferably, the oil collecting chamber is internally provided with an oil return channel, the oil return channel consists of two longitudinally parallel fixed wallboards and a rectangular plugboard, the fixed wallboards are connected with the conical inner wall of the conical part of the oil collector, one end of the rectangular plugboard is vertically inserted into the grooves formed by the two fixed wallboards, an oil passing hole is reserved at the bottom of the rectangular plugboard, the other end of the rectangular plugboard is inlaid in the upper plane of the fixed wallboards, the upper partition board of the channel is provided with a plurality of balance holes, the conical surface of the conical part of the oil collector is provided with the balance holes and oil return holes, the balance holes are arranged on the upper part of the oil return channel, the oil return holes are arranged in the middle part of the oil return channel, the oil passing hole is arranged at the bottom of the oil collecting chamber, and the balance holes are arranged in the oil return channel, and the oil passing holes are communicated with the oil collecting chamber and the oil return channel.
Preferably, the baffle includes circular plate body, circular labyrinth circle and retaining ring, the outer fringe of plate body with the inside wall butt on casing upper portion, the upper surface of plate body upwards protrudes and forms the retaining ring, the top of retaining ring with the lower surface butt of apron, the lower surface of plate body downwards protrudes and forms circular labyrinth circle, cavity between casing lower part and the baffle is cut apart and is formed circular labyrinth, the gas outlet has been seted up at the central authorities of apron, the through-hole that corresponds has also been seted up to the central authorities of baffle, the outlet duct runs through apron and baffle entering filter screen inboard stretches into in the U-shaped circle of oil catcher, stretches into partial outlet duct and U-shaped circle and is the contactless cooperation of clearance. The labyrinth ring and the tangential plane air inlet are arranged to realize the function of centrifugally separating liquid oil.
Preferably, the baffle laminating outlet duct position is upwards turned up and is had the hem, the top of hem is laminated with the lower surface of apron, a plurality of current-limiting compensation holes have been seted up at the top of retaining ring to laminate with the lower plane of apron, current-limiting compensation hole intercommunication inner cavity and outer cavity, pressure differential compensation hole upper end and inner cavity intercommunication, the lower extreme communicates with each other with the cavity after straining. The pressure difference compensation hole has the functions of increasing the pressure difference between the cavity before filtering and the cavity after filtering, improving the performance of the filter screen for adhering the fog engine oil and blocking the liquid oil from entering the cavity after filtering.
Preferably, the differential pressure compensation holes formed in the plate body are arranged at intervals in a ring shape by taking the center of the partition plate as the center of the circle, the filter screen air compensation holes formed in the plate body are also arranged at intervals in a ring shape by taking the center of the partition plate as the center of the circle, the differential pressure compensation holes are all positioned at the inner side of the check ring, and the filter screen air compensation holes are all positioned at the outer side of the check ring. The invention ensures the balanced and reasonable configuration of the compensation air.
Preferably, the side wall of the upper part of the shell is provided with a closed outer circulation chamber, the side wall of the upper part of the shell is provided with a safety valve and a safety through hole corresponding to the outer circulation chamber, the upper part of the safety valve is provided with a circulation through hole, the outer circulation chamber is communicated with the outer cavity through the circulation through hole, and the pre-filtration cavity is communicated with the outer circulation chamber through the safety through hole and the safety valve. The safety valve is used as a balance safety component of the shell pressure, and the safety valve is not needed to be configured in the invention, but is opened when the pressure of the cavity before filtration is too high under extreme or special conditions, the safe operation of the invention can still be kept through the outer circulation chamber, and meanwhile, air is returned into the shell after the outer circulation, so that the efficiency of internal oil-gas separation is not reduced.
Preferably, an auxiliary filter screen is arranged on the upper surface of the partition plate. The invention can further improve the separation efficiency by additionally arranging the auxiliary filter screen.
The invention has the substantial effects that the oil gas is efficiently separated in an integral negative pressure separation mode, after entering from the air inlet section of the shell, the oil gas is firstly subjected to preliminary centrifugal separation through the labyrinth and then enters the filter screen, the oil gas is efficiently separated by the filter screen, the compensation air enters the upper end of the filter screen and the cavity after the filter screen through the compensation holes on the partition plate, when the compensation air enters the filter screen under the action of negative pressure, the downward flow speed of the engine oil can be accelerated due to the fact that the flow direction of the air is consistent with the gravity direction of the engine oil, the filter screen is prevented from being saturated by the engine oil, the trafficability of the air on the filter screen is improved, on the other hand, the air crossing technology and the filter screen technology are combined, engine oil particles with smaller particle sizes can be intercepted, and the oil gas separation efficiency can be greatly improved under the condition of the same density filter screen. The retaining ring that sets up on the baffle then can prevent that engine oil from carrying out the back-suction from the baffle top, the effect of compensating interior cavity air is then played to the restriction compensation hole of seting up on the retaining ring, after the air is leading-in, under the negative pressure effect of outlet duct bottom, the downward movement of compensation air forms the wind wall effect, it moves to the outlet duct to block engine oil, the setting of oil collector has played the effect of collecting engine oil on the filter screen, at the during operation, the leading-in negative pressure of oil collector negative pressure through-hole, the inside negative pressure that forms of oil collection room, under the effect of negative pressure, engine oil downward movement is to oil collection intracavity entering oil collection room, oil return channel balance hole's setting makes oil return channel pressure and oil collection room, the pressure of straining preceding cavity keep balanced, do benefit to the liquid oil in the collection chamber nature to flow from the oil return hole. Finally, the filtered gas of the crankcase mixed gas after multiple and separation is converged with the compensation air, and flows upwards along the air outlet pipe from the bottom of the air outlet pipe until being sucked out of the air outlet. According to the invention, by changing the flowing direction of the gas and utilizing the principle of negative pressure separation, the effects of crossing the compensation gas and the oil-gas mixture and separating the oil and gas by combining fiber adhesion are realized, the separation effect is excellent, meanwhile, the reflux of the liquid engine oil is enhanced through the oil collector, the condition that the liquid engine oil is sucked out from the air outlet pipe is avoided, and the self-cleaning effect of the filter screen is formed.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention;
FIG. 2 is a schematic view of a separator plate according to the present invention;
FIG. 3 is a schematic side view of the oil collector of the present invention;
FIG. 4 is a schematic side view of the internal structure of the oil collector of the present invention;
Fig. 5 is a schematic elevational view of the oil collector of the present invention.
In the figure, 1, a shell, 11, an air inlet, 12, an oil return port, 13, an oil collector supporting seat, 14, an air compensation inlet, 2, an air outlet pipe, 3, a cover plate, 4, a baffle plate, 41, a filter screen air compensation hole, 42, a differential pressure compensation hole, 43, a flow limiting compensation hole, 44, a circular labyrinth, 5, a filter screen, 6, an oil collector, 61, a filter screen supporting seat, 62, an oil collector conical part, 63, an oil collecting chamber, 64, a right-angle inserting plate, 65, an oil collecting hole, 66, a balance hole, 67, an oil collector negative pressure through hole, 68, an oil return hole, 69, an oil passing hole, 60, a U-shaped ring, 7, a safety valve, 71, a safety through hole, 72 and a circulating through hole are shown.
Detailed Description
The technical scheme of the invention is further specifically described below through specific embodiments and with reference to the accompanying drawings.
Examples:
a negative pressure type oil-gas separation device (see figure 1, figure 2, figure 3, figure 4 and figure 5) comprises a shell 1, an air outlet pipe 2, a cover plate 3, a baffle plate 4, The filter screen 5 and the oil collector 6, the air inlet 11 has been seted up to the upper portion lateral wall of casing, oil return port 12 has been seted up to the lower extreme of casing, and the casing is inside to be cut apart into by the filter screen and strain preceding cavity and after the cavity, the casing lower part is provided with the oil collector, set up air compensation import 14 on the apron, the upper surface of baffle is protruding upwards to form the retaining ring, cavity between baffle and the apron is cut apart into outer cavity and interior cavity by the retaining ring, and the outer cavity corresponds the filter screen position and has seted up and has introduced decurrent filter screen air compensation hole 41, and decurrent differential pressure compensation hole 42 has been seted up to the interior cavity, the upper surface of filter screen and the lower surface butt of baffle, the lower surface of filter screen and the upper surface butt of oil collector, the outlet duct stretches into the filter screen inboard and is facing the oil collector, oil collecting chamber 63 has been seted up to the lower surface of oil collector correspondence filter screen, and oil collecting hole 65 has been seted up to the oil collecting hole and oil collecting chamber intercommunication. An oil collector supporting seat 13 is arranged on the inner wall of the lower part of the inner side of the shell upwards, and the oil collector is erected on the oil collector supporting seat. The oil collector comprises a filter screen supporting seat 61, an oil collector conical part 62 and a U-shaped ring 60 which are integrally formed, wherein the oil collector conical part is positioned below the filter screen supporting seat, oil collecting chambers are formed in the filter screen supporting seat and the oil collector conical part, a circle of oil collecting holes are formed in positions, corresponding to the filter screens, of the filter screen supporting seat, one end of each oil collecting hole is communicated with the filter screen, and the other end of each oil collecting hole is communicated with the oil collecting chamber. The bottom of the inner side of the U-shaped ring is provided with an oil collector negative pressure through hole 67, and the hole wall of the oil collector negative pressure through hole is downwards protruded to form a boss for blocking liquid oil from being sucked back. The oil collecting chamber is internally provided with an oil return channel, the oil return channel consists of two longitudinally parallel fixed wallboards and a right-angle inserting plate 64, the fixed wallboards are connected with the conical inner wall of the conical part of the oil collector, one end of the right-angle inserting plate is vertically inserted into a groove formed by the two fixed wallboards, an oil passing hole 69 is reserved at the bottom of the oil collecting chamber, the other end of the right-angle inserting plate is inlaid in the upper plane of the fixed wallboards, the upper partition board of the channel is provided with a plurality of balance holes 66, the conical surface of the conical part of the oil collector is provided with balance holes and oil return holes 68, the balance holes are arranged on the upper part of the oil return channel, the oil return holes are arranged in the middle part of the oil return channel, the oil passing holes are arranged at the bottom of the oil collecting chamber, and the oil return holes are all arranged in the oil return channel, and the oil passing holes are communicated with the oil collecting chamber and the oil return channel. The baffle includes circular plate body, circular labyrinth circle and retaining ring, the outer fringe of plate body with the inside wall butt on casing upper portion, the upper surface of plate body upwards protrudes and forms the retaining ring, the top of retaining ring with the lower surface butt of apron, the lower surface of plate body downwards protrudes and forms circular labyrinth circle, cavity between casing lower part and the baffle is cut apart and is formed circular labyrinth 44, the gas outlet has been seted up at the central authorities of apron, the through-hole that corresponds has also been seted up to the central authorities of baffle, the outlet duct runs through apron and baffle entering filter screen inboard and stretches into in the U-shaped circle. The baffle laminating outlet duct position upwards turns up and has the hem, the top of hem is laminated with the lower surface of apron, a plurality of current-limiting compensation holes 43 have been seted up at the top of retaining ring to laminate with the lower plane of apron, current-limiting compensation hole intercommunication inner cavity and outer cavity, pressure differential compensation hole upper end and inner cavity intercommunication, the lower extreme communicates with each other with the cavity after straining. An auxiliary filter screen is arranged on the upper surface of the partition plate. The side wall of the upper part of the shell is provided with a closed outer circulation chamber, the side wall of the upper part of the shell is provided with a safety valve 7 corresponding to the outer circulation chamber, the upper part of the safety valve is provided with a circulation through hole 72, the outer circulation chamber is communicated with an outer cavity through the circulation through hole, and the pre-filtration cavity is communicated with the outer circulation chamber through a safety through hole 71 and the safety valve. The differential pressure compensation holes formed in the plate body are arranged at intervals in a ring shape by taking the center of the partition plate as the center of the circle, the filter screen air compensation holes formed in the plate body are also arranged at intervals in a ring shape by taking the center of the partition plate as the center of the circle, the differential pressure compensation holes are all positioned at the inner side of the check ring, and the filter screen air compensation holes are all positioned at the outer side of the check ring.
In the embodiment, the oil and gas are separated in an integral negative pressure separation mode, in the embodiment, the oil and gas firstly pass through a labyrinth to be subjected to primary centrifugal separation after entering from an air inlet, then enter a filter screen to be subjected to high-efficiency separation, compensation air enters the filter screen and a cavity after filtration through compensation holes in a partition plate, when the compensation air enters the filter screen under the action of negative pressure, the downward flowing speed of engine oil can be accelerated due to the fact that the flowing direction of the air is consistent with the gravity direction of engine oil, the filter screen is prevented from being saturated by the engine oil, the passing performance of the air on the filter screen is improved, on the other hand, an air crossing technology is combined with the filter screen technology, engine oil particles with smaller particle sizes can be intercepted, and the oil and gas separation efficiency can be greatly improved under the condition of the same density filter screen. The retaining ring that sets up on the baffle then can prevent that engine oil from carrying out the back-suction from the baffle top, the effect of compensating interior cavity air is then played to the restriction compensation hole of seting up on the retaining ring, after the air is leading-in, under the negative pressure effect of outlet duct bottom, the downward movement of compensation air forms the wind wall effect, it moves to the outlet duct to block engine oil, the setting of oil collector has played the effect of collecting engine oil on the filter screen, at the during operation, the leading-in negative pressure of oil collector negative pressure through-hole, the inside negative pressure that forms of oil collection room, under the effect of negative pressure, engine oil downward movement is to oil collection intracavity entering oil collection room, oil return channel balance hole's setting makes oil return channel pressure and oil collection room, the pressure of straining preceding cavity keep balanced, do benefit to the liquid oil in the collection chamber nature to flow from the oil return hole. Finally, the filtered gas of the crankcase mixed gas after multiple and separation is converged with the compensation air, and flows upwards along the air outlet pipe from the bottom of the air outlet pipe until being sucked out of the air outlet. According to the embodiment, through changing the flowing direction of the gas and utilizing the principle of negative pressure separation, the effect of intersecting the compensation gas and the oil-gas mixture and combining the cooling and fiber adhesion to separate the oil and gas is realized, the separation effect is excellent, meanwhile, the reflux of the liquid engine oil is enhanced through the oil collector, the condition that the liquid engine oil is sucked out from the air outlet pipe is avoided, and the self-cleaning effect of the filter screen is formed.
The above-described embodiment is only a preferred embodiment of the present invention, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (10)
1. The utility model provides a negative pressure type oil-gas separation device, includes casing, outlet duct, apron, baffle, filter screen and oil collector, the air inlet has been seted up to the upper portion lateral wall of casing, the oil return opening has been seted up to the lower extreme of casing, and the casing is inside to be cut apart into by the filter screen and strain preceding cavity and after-filter cavity, its characterized in that: the lower part of the shell is provided with an oil collector, the cover plate is provided with an air compensation inlet, the upper surface of the baffle plate protrudes upwards to form a baffle ring, a cavity between the baffle plate and the cover plate is divided into an outer cavity and an inner cavity by the baffle ring, the outer cavity is provided with an air compensation hole for introducing a downward filter screen corresponding to the position of the filter screen, the inner cavity is provided with a pressure difference compensation hole for introducing the downward filter screen, the upper surface of the filter screen is abutted with the lower surface of the baffle plate, the lower surface of the filter screen is abutted with the upper surface of the oil collector, the air outlet pipe extends into the inner side of the filter screen to face the oil collector, an oil collecting chamber is formed in the oil collector, the lower surface of the filter screen corresponding to the oil collector is provided with an oil collecting hole, and the oil collecting hole is communicated with the oil collecting chamber; the oil collector comprises a filter screen supporting seat, an oil collector conical part and a U-shaped ring which are integrally formed.
2. The negative pressure type oil-gas separation device according to claim 1, wherein the oil collector is arranged on the oil collector supporting seat.
3. The negative pressure type oil-gas separation device according to claim 1, wherein the conical part of the oil collector is positioned below the filter screen supporting seat, oil collecting chambers are formed in the filter screen supporting seat and the conical part of the oil collector, a circle of oil collecting holes are formed in the filter screen supporting seat at positions corresponding to the filter screens, one ends of the oil collecting holes are communicated with the filter screens, and the other ends of the oil collecting holes are communicated with the oil collecting chambers.
4. The negative pressure type oil-gas separation device of claim 1, wherein the U-shaped ring is provided with an oil collector negative pressure through hole at the bottom of the inner side, and the hole wall of the oil collector negative pressure through hole is downwards protruded to form a boss for blocking liquid oil from being sucked backwards.
5. The negative pressure type oil-gas separation device according to claim 1, wherein the oil collecting chamber is internally provided with an oil return channel, the oil return channel consists of two longitudinally parallel fixed wallboards and a rectangular plugboard, the fixed wallboards are connected with the conical inner wall of the conical part of the oil collector, one end of each rectangular plugboard is vertically inserted into a groove formed by the two fixed wallboards, an oil passing hole is reserved at the bottom of each rectangular plugboard, the other end of each rectangular plugboard is inlaid in the upper plane of the fixed wallboard, a plurality of balance holes are formed in the upper partition board of the channel, a balance hole and an oil return hole are formed in the conical surface of the conical part of the oil collector, the balance holes are formed in the upper part of the oil return channel, the oil return hole is formed in the middle part of the oil return channel, the oil passing hole is formed in the bottom of the oil collecting chamber, and the oil return holes are formed in the oil return channel, and the oil passing holes are communicated with the oil collecting chamber and the oil return channel.
6. The negative pressure type oil-gas separation device according to claim 1, wherein the baffle plate comprises a circular plate body, a circular labyrinth ring and a retainer ring, the outer edge of the plate body is abutted with the inner side wall of the upper portion of the shell, the upper surface of the plate body is upwards protruded to form the retainer ring, the top end of the retainer ring is abutted with the lower surface of the cover plate, the lower surface of the plate body is downwards protruded to form the circular labyrinth ring, a cavity between the lower portion of the shell and the baffle plate is divided to form the circular labyrinth, the center of the cover plate is provided with an air outlet, the center of the baffle plate is also provided with a corresponding through hole, and the air outlet pipe penetrates through the cover plate and the baffle plate to enter the inner side of the filter screen and stretches into the U-shaped ring.
7. The negative pressure type oil-gas separation device according to claim 1, wherein the separator is provided with a folded edge in an upward turned mode at the position of the separator attaching air outlet pipe, the top end of the folded edge is attached to the lower surface of the cover plate, the top of the retainer ring is provided with a plurality of current-limiting compensation holes which are attached to the lower plane of the cover plate, the current-limiting compensation holes are communicated with the inner cavity and the outer cavity, the upper end of the pressure difference compensation hole is communicated with the inner cavity, and the lower end of the pressure difference compensation hole is communicated with the cavity after filtration.
8. The negative pressure type oil-gas separation device of claim 6, wherein the pressure difference compensation holes are arranged in a ring-shaped interval manner by taking the center of the partition plate as the center of the circle, the filter screen air compensation holes are also arranged in a ring-shaped interval manner by taking the center of the partition plate as the center of the circle, the pressure difference compensation holes are all positioned at the inner side of the check ring, and the filter screen air compensation holes are all positioned at the outer side of the check ring.
9. The negative pressure type oil-gas separation device according to claim 1, wherein the side wall of the upper part of the shell is provided with a closed outer circulation chamber, the side wall of the upper part of the shell is provided with a safety valve and a safety through hole corresponding to the outer circulation chamber, the upper part of the safety valve is provided with a circulation through hole, the outer circulation chamber is communicated with the outer cavity through the circulation through hole, and the pre-filtration cavity is communicated with the outer circulation chamber through the safety through hole and the safety valve.
10. The negative pressure type oil-gas separation device of claim 1, wherein an auxiliary filter screen is arranged on the upper surface of the partition plate.
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| DE20302220U1 (en) * | 2003-02-11 | 2004-06-24 | Hengst Gmbh & Co.Kg | Oil separator for de-oiling internal combustion engine crankcase venting gases has oil separation insert in form of cyclone part for insertion into unaltered housing instead of mesh body |
| WO2009070963A1 (en) * | 2007-11-19 | 2009-06-11 | Zhicai Hong | Oil-gas separator device |
| CN102705040B (en) * | 2012-06-18 | 2014-08-13 | 南充凌云高聚制造有限公司 | Independent external-mounting maintenance-free multi-stage oil and gas separator assembly |
| CN103899381A (en) * | 2012-12-27 | 2014-07-02 | 现代自动车株式会社 | Oil filter system for vehicle |
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