CN111022152B - Centrifugal oil-gas separation device - Google Patents
Centrifugal oil-gas separation device Download PDFInfo
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- CN111022152B CN111022152B CN202010016120.6A CN202010016120A CN111022152B CN 111022152 B CN111022152 B CN 111022152B CN 202010016120 A CN202010016120 A CN 202010016120A CN 111022152 B CN111022152 B CN 111022152B
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- 238000000926 separation method Methods 0.000 title claims abstract description 138
- 238000003825 pressing Methods 0.000 claims abstract description 47
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 25
- 230000001105 regulatory effect Effects 0.000 claims description 19
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 35
- 239000010705 motor oil Substances 0.000 description 13
- 239000002245 particle Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F01M2013/0422—Separating oil and gas with a centrifuge device
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a centrifugal oil-gas separation device. The outer shell of the device is bell-shaped, the top of the outer shell is closed, the opening of the outer shell is downward, and the inner cavity of the outer shell is hollow, and the outer shell is connected with the inner shell to form an oil-gas separation cavity for installing an oil-gas separation mechanism; an air inlet interface arranged at one side of the top of the outer shell is communicated with an air inlet hole which is arranged at the top end of the inner cavity of the outer shell and positioned at the inner side of the first bearing seat; the other side of the top of the outer shell is provided with is arranged on the shell the top end of the internal cavity is positioned at the first part the air outlet hole at the outer side of the bearing seat is communicated; the separation blade group in the oil-gas separation mechanism is fixed in the middle of the middle shaft by a first pressing plate sleeved at one end of the middle shaft and a second pressing plate sleeved at the other end of the middle shaft; the air inlet hole is sequentially communicated with the hollow part of the upper pressing plate and the hollow structure in the middle of each blade in the separation blade group; the peripheral space of the separation blade group is communicated with the air outlet. The structural design of the invention accords with the discharge rule that the gas is light and easy to ascend, the oil molecules are heavy and easy to descend, and is reasonable and compact.
Description
Technical Field
The present invention relates to a centrifugal oil-gas separation device and an engine equipped with the same.
Background
Along with the increasing requirements of automobile countries on vehicle emission regulations, in order to reduce the pollution of the mobile sources of the engines, the requirements on the separation efficiency of the crankshaft ventilation oil-gas separator are also increasing, and the separation efficiency of the conventional labyrinth oil-gas separation and filtration type oil-gas separation cannot meet the requirements.
At present, a centrifugal oil-gas separator is commonly used, an air inlet interface is arranged at the upper end of a shell, and an air outlet interface is arranged on the side surface or the lower surface of the shell, so that the gas travelling route after oil-gas separation is from top to bottom. Because the gas is lighter, the rule of the gas is that the gas is easy to go upwards and difficult to go downwards, and therefore, the defect in the design of the prior art is that the gas is not in line with the rule of gas operation, and the separated clean gas can be reversed or the oil-containing gas can be directly discharged from the gas outlet.
In addition, the air inlet interface of the existing centrifugal oil-gas separator is arranged at the upper end of the shell, and the air outlet interface is arranged on the side surface or below the shell, so that the occupied space of the external pipeline is larger, and the centrifugal oil-gas separator cannot be suitable for use occasions with smaller installation space. Meanwhile, the air outlet channel is arranged below or on the side surface of the shell, so that the route is longer, the structure is more complex, and the manufacturing cost is relatively higher.
Disclosure of Invention
The invention aims to provide a centrifugal oil-gas separation device.
Another technical problem to be solved by the invention is to provide an engine with the centrifugal oil-gas separation device.
For the centrifugal oil-gas separation device, the invention adopts the technical scheme that the centrifugal oil-gas separation device comprises an outer shell, an inner shell and an oil-gas separation mechanism;
the outer shell is bell-shaped with a closed top, a downward opening and a hollow inner cavity, the inner wall of the outer shell is in sealing connection with the outer edge of the inner shell near the opening end, and a closed cavity between the inner cavities of the outer shell and the inner shell is an oil-gas separation cavity;
the top end of the inner cavity of the outer shell is provided with a first bearing seat which is a ring-shaped bulge facing the inner cavity of the outer shell;
an air inlet interface is arranged on one side of the top of the outer shell and is communicated with an air inlet hole which is arranged at the top end of the inner cavity of the outer shell and is positioned at the inner side of the first bearing seat;
The other side of the top of the outer shell is provided with an air outlet interface which is communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell and is positioned at the outer side of the first bearing seat;
an oil-gas separation mechanism is arranged in the middle of the oil-gas separation cavity;
the oil-gas separation mechanism comprises a center shaft, a first pressing plate, a second pressing plate and a separation blade group;
The inner side of the first bearing seat is provided with a bearing mounting hole, and one end of the center shaft is connected with the bearing mounting hole through a bearing;
the separating blade group is fixed in the middle of the middle shaft by a first pressing plate sleeved on one end of the middle shaft and a second pressing plate sleeved on the other end of the middle shaft;
the first pressing plate is also in sealing connection with the side wall of the annular bulge of the first bearing seat, and the middle of the first pressing plate is a hollow part;
The middle of each separation blade in the separation blade group is provided with a hollow structure, and the hollow structure is communicated with the gaps among the separation blades;
the other end of the middle shaft is connected with a second bearing arranged in the middle of the inner cavity of the inner shell through another bearing, and the other end of the middle shaft penetrates through the second bearing seat to extend outwards from the oil-gas separation cavity;
An air inlet hole which is arranged at the top end of the inner cavity of the outer shell and positioned at the inner side of the first bearing seat is sequentially communicated with the hollow part of the first pressing plate and the hollow structure in the middle of each blade in the separation blade group;
The peripheral space of the separation blade group is communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell and is positioned at the outer side of the first bearing seat.
Preferably, the occupation area of the bearing mounting hole is smaller than the inner side area of the first bearing seat, and the air inlet hole is arranged on the inner side of the first bearing seat and is positioned on the outer side of the bearing mounting hole.
Preferably, an annular protrusion is arranged on the periphery of the edge of the first pressing plate, and the annular protrusion is connected with the side wall of the first bearing seat through a gap sealing structure.
Preferably, the top of the outer shell is also provided with a pressure regulating valve; the inner cavity of the pressure regulating valve is communicated with the air outlet hole, and the air outlet hole is communicated with the air outlet interface through the inner cavity and the valve port of the pressure regulating valve.
Preferably, the first pressing plate arranged at one end of the separation blade set is provided with a positioning convex wedge facing the separation blade set, and the positioning convex wedge is embedded into a positioning hole on the separation blade at the middle edge end of the separation blade set, so that the separation blade set does not shift along with the synchronous rotation of the first pressing plate;
the ring groove arranged on the center shaft is clamped with the check ring, and the check ring tightly pushes a compression spring against the other end of the separation blade set through the second pressing plate.
Preferably, the inner shell is a horn-shaped component with an opening facing the oil-gas separation cavity, and the outer edge of the horn-shaped component is connected with the inner wall of the outer shell through a sealing piece.
Preferably, the device further comprises a supporting seat; the support seat is a basin-shaped shell with a single end opening and a slope-shaped bottom; the open end of the supporting seat is connected with the open end of the outer shell, and the other end of the middle shaft extending out of the oil-gas separation cavity is positioned in the inner cavity of the supporting seat;
At least 2 nozzle seats for installing nozzles are arranged on the side part of the supporting seat, wherein one nozzle seat is opened with an inner cavity and provided with nozzles, and the rest nozzle seats are reserved nozzle seats with closed inner cavities for standby;
The other end of the center shaft is fixedly connected with a driving wheel, the center shaft of a nozzle arranged in the inner cavity of the nozzle seat and the center shaft of the driving wheel deviate from a set distance, and the nozzle opening of the nozzle faces to the blade of the driving wheel.
As a further preference, the drive wheel comprises a first impeller and a second impeller; the first boss in the middle of the first impeller is embedded into the central groove on the second boss in the middle of the second impeller, and the convex wedge at the edge of the first boss is embedded into the groove at the edge of the central groove of the second boss to be positioned; the central hole of the first boss and the central groove of the second boss are internally provided with a step hole with smaller diameter which is connected with the center shaft in a penetrating way.
For the engine provided with the centrifugal oil-gas separation device, the technical scheme adopted by the invention is that an air inlet port of the centrifugal oil-gas separation device is communicated with a crankshaft ventilation exhaust port of the engine through an air inlet pipeline, an air outlet port of the centrifugal oil-gas separation device is communicated with an air inlet channel of the engine through an air outlet pipeline, a nozzle of the centrifugal oil-gas separation device is communicated with a hydraulic loop of the engine through a hydraulic pipeline, and an oil drain port is arranged at the bottom of a supporting seat of the centrifugal oil-gas separation device and is communicated with an oil pan of the engine.
The beneficial effects of the invention are as follows:
The air inlet interface and the air outlet interface are all arranged at the top of the outer shell, so that oil-containing gas enters the oil-gas separation cavity from the top of the shell for oil-gas separation, and clean gas after oil-gas separation is discharged from the top of the shell. The air inlet channel and the air outlet channel are reasonably arranged and sealed and isolated structurally, so that the design of the air channel accords with the discharge rule that the air is light and easy to ascend, the oil molecules are heavy and easy to descend.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a front view of an embodiment of the invention, taken along the line A-A of fig. 1.
Fig. 3 is a B-B cross-sectional view of fig. 2.
Fig. 4 is a C-C cross-sectional view of fig. 2.
Fig. 5 is a D-D cross-sectional view of fig. 2.
Fig. 6 is a top view of an embodiment of the present invention.
Fig. 7 is a sectional view of E-E of fig. 6.
The marks in the figure: 1-shell, 2-air inlet connector, 201-air inlet connector, 3-air outlet connector, 301-air outlet connector, 4-pressure regulating valve, 401-inner cavity, 402-valve port, 5-upper bearing seat, 501-upper bearing, 6-oil-gas separation cavity, 7-inner shell, 8-lower bearing seat, 801-lower bearing, 9-middle shaft, 10-separation blade group, 11-driving wheel, 12-upper impeller, 13-lower impeller, 14-supporting seat, 15-nozzle seat, 16-nozzle, 17-magnet, 18-reserved nozzle seat, 19-check valve, 20-oil drain port, 21-fastening bolt, 22-pressing plate, 23-air inlet channel, 24-air outlet channel, 25-upper pressing plate, 26-lower pressing plate, 27-air outlet hole, 28-mounting surface, 29-mounting hole and 30-sealing gasket.
Detailed Description
In the following description of the present embodiment, it should be understood that the directions or positional relationships indicated by the words "upper", "lower", "inner", "outer", etc., are based on the directions or positional relationships indicated in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element shown must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
FIG. 1 is a schematic illustration of a centrifugal oil and gas separation device. It consists of an outer housing 1, an inner housing 7, a centrifugal separation mechanism and a support seat 14.
1. Outer shell, inner shell, oil-gas separation cavity and oil-gas separation mechanism
The outer casing 1 is bell-shaped with a single end opening, the top of the device is closed, the open end is downward, and the inner cavity is hollow. The inner wall at the opening end of the outer shell 1 is in sealing connection with the outer edge of the inner shell 7, and a closed cavity between the inner wall of the outer shell and the inner wall of the inner shell is an oil-gas separation cavity.
The top end of the inner cavity of the outer shell is provided with an upper bearing seat 5 which is a circle of annular bulges facing the inner cavity of the outer shell. The upper bearing seat is internally provided with a mounting hole of the upper bearing 501.
Fig. 2 is a stepped sectional view of the centrifugal oil and gas separation device of fig. 1 in a direction a through the central axes of the outer housing 1 and the inner housing 7, in two parallel sections along the axis of the inlet port 2 and along the central axis of the nozzle, respectively. In fig. 2, an inlet port 2 and an outlet port 3 are provided at the top of the outer case, respectively. Wherein the air inlet interface 2 is communicated with an air inlet hole arranged at the top end of the inner cavity of the outer shell. The air outlet port 3 is communicated with an air outlet hole 27 arranged at the top end of the inner cavity of the outer shell.
In order to facilitate the external connection of the air inlet pipeline and the air outlet pipeline, the air inlet connector 201 is arranged at the outer end of the air inlet connector 2, and the air outlet connector 301 is arranged at the outer end of the air outlet connector 3. The connection between the air inlet connector 2 and the air inlet connector 201, and the connection between the air outlet connector 3 and the air outlet connector 301 are sealed by sealing rings, and then the air inlet connector or the air outlet connector is pressed on the air inlet connector or the air outlet connector by the pressing plate 22, and the pressing plate 22 is screwed in the connecting screw hole of the outer shell through a screw.
In fig. 4, the air inlet port 2 and the air outlet port 3 are disposed in a manner of being located on the same central axis and having opposite opening directions, wherein the air inlet port is located on the left side of the outer casing in the figure, and the air outlet port is located on the right side of the outer casing in the figure, so that external pipelines connecting the air inlet port and the air outlet port are not interfered with each other.
The top end of the inner cavity of the outer shell body is isolated from the air inlet hole and the air outlet hole through the upper bearing seat, the air inlet hole is arranged at the inner side of the upper bearing seat, and the air outlet hole 27 is arranged at the outer side of the upper bearing seat.
In fig. 6, the top of the outer casing is provided with a pressure regulating valve which is mounted in a pressure regulating valve mounting seat, and the pressure regulating valve mounting seat is arranged to be biased to one side of the air outlet port 3, and below the pressure regulating valve mounting seat is an air outlet hole 27. The structure design facilitates the communication between the air outlet hole 27 arranged on the outer side of the upper bearing seat and the inner cavity 401 of the pressure regulating valve 4, and the inner cavity of the pressure regulating valve is communicated with the air outlet port 3 through the valve port 402 (figure 7), so that the whole structure is reasonable and compact.
The inner shell 7 is a horn-shaped component with an upward opening, the outer edge of the horn-shaped component is connected with the inner wall of the lower part of the outer shell through 2 sealing rings, and a sealed oil-gas separation cavity 6 for installing an oil-gas separation mechanism is formed between the inner wall of the outer shell and the inner wall of the inner shell.
The horn-shaped opening of the inner shell 7 is upward, and the middle of the inner cavity of the inner shell is concave, so that the oil separated by oil-gas can be collected.
The oil-gas separation mechanism is installed in the oil-gas separation chamber 6, and mainly consists of a central shaft 9, an upper pressing plate 25, a lower pressing plate 26 and a separation blade group 10. The upper end of the middle shaft 9 is connected with an upper bearing 501 in a penetrating way, and the upper bearing is fixed in a bearing mounting hole inside an upper bearing seat 5 positioned at the top end of the inner cavity of the outer shell in the oil-gas separation cavity. The lower part of the middle shaft is connected with a lower bearing 801 in a penetrating way, and the lower bearing is arranged in a bearing mounting hole of a lower bearing seat 8 positioned at the center part of the inner shell in the oil-gas separation cavity.
The splitter vane assembly 10 is formed by a plurality of splitter vanes that are threaded onto a central shaft and stacked along the axis of the central shaft. The middle of each separation blade in the separation blade group is provided with hollow structures which are communicated with each other, and oil gas entering from the air inlet interface can enter gaps among the separation blades from the hollow structures.
The separation blade group 10 is positioned and fixed by an upper pressing plate 25 and a lower pressing plate 26 provided on the center shaft in the following manner:
The upper pressing plate 25 is arranged at the upper end of the central shaft, a positioning convex wedge protruding downwards is arranged on the upper pressing plate, and a positioning hole with a shape matched with that of the separation blade positioned at the uppermost end in the separation blade group is arranged on the separation blade. When the upper pressing plate is in contact with the separating blades, the positioning convex wedges are just embedded into the positioning holes on the separating blades, so that the separating blade group is positioned, and all the separating blades of the separating blade group synchronously rotate along with the upper pressing plate without displacement.
The lower platen 26 is disposed at the lower part of the central shaft, a compression spring is penetrated on the central shaft between the lower platen 26 and the lower bearing 801, the upper end of the compression spring is upwards propped against the lower platen from the lower side of the lower platen, the lower end of the compression spring is supported by a retainer ring, the retainer ring is positioned through a ring groove disposed on the main shaft, the compression spring provides compression force, the lower platen and the separation blade set are upwards propped, and the separation blade set is positioned through contact with the upper platen. When the center shaft drives the separation blade set to rotate, the upper pressing plate and the lower pressing plate synchronously rotate with the separation blade set.
In addition, a magnet 17 for measuring the rotation speed of the separating blade is arranged at the side of the upper pressing plate, and a corresponding speed measuring sensor is arranged at the top of the outer shell. The rotational speed of the magnet 17 rotating with the separation blade group is measured by a tachometer sensor to measure the rotational speed of the entire separation blade group.
The middle shaft 9 is of a hollow structure, and has the functions of reducing the weight of the middle shaft and introducing oil gas in the engine oil pan into the oil-gas separation mechanism for oil-gas separation.
The lowest part of the trumpet-shaped inner cavity of the inner shell 7 is also provided with a one-way valve 19 which adopts an umbrella-shaped valve structure and has the function of guiding separated engine oil gathered in the trumpet-shaped inner cavity of the inner shell into the inner cavity of the one-way valve inflow supporting seat 14.
2. Support base, driving wheel and nozzle
The support base 14 is located at the lower portion of the entire centrifugal oil-gas separation device for accommodating and mounting the driving mechanism of the oil-gas separation mechanism.
The support base is a basin-shaped shell with an open upper end and a closed bottom, and the open end of the support base is connected with the open end of the outer shell 1 through a fastening bolt 21.
The lower end of the center shaft 9 passes through the middle of the lower bearing and extends from the inner shell to the middle of the inner cavity of the supporting seat in the oil-gas separation cavity. A driving wheel 11 is fixedly connected with the lower end of the middle shaft and can drive the middle shaft to rotate.
In fig. 3, the driving wheel adopts an assembly structure of an upper impeller and a lower impeller. Wherein, the middle of the upper impeller 12 is provided with a round upper boss, two convex wedges are symmetrically arranged at the outer edge of the upper boss, and a central hole is arranged at the center of the upper boss. The middle of the lower impeller 13 is provided with a lower boss, the center of the lower boss is provided with a round step hole with a big upper part and a small lower part, and two grooves are symmetrically arranged on the outer edge of the big step hole.
The shape of the circular upper boss of the upper impeller is matched with the large circular step hole on the lower boss of the lower impeller, and the shape and the position of the two wedges on the upper boss are matched with the shape and the position of the two grooves on the lower boss. When the upper impeller and the lower impeller are assembled into a driving wheel, the round upper boss of the upper impeller is just embedded into the large step hole of the lower impeller, and two wedges at the outer edge of the upper boss are wedged into two grooves at the outer edge of the large round step hole above the lower boss for positioning. In addition, the middle shaft 9 respectively passes through the center hole of the upper impeller and the small step hole in the center of the lower impeller and is fixedly connected with the upper impeller and the lower impeller.
The periphery of the upper impeller is fixedly connected with 16 driving blades with arc-shaped curved surfaces, and after the upper impeller and the lower impeller are assembled into a driving wheel, the 16 driving blades are uniformly distributed and arrayed along the periphery of the driving wheel.
The driving wheel 11 can convert the hydraulic energy ejected from the nozzle 16 into mechanical energy rotating at a high speed, and drive the separation blade group to rotate at a high speed through the center shaft, and the separation blade group rotating at a high speed forms a centrifugal force for oil-gas separation.
The driving wheel adopts the assembly structure of the upper impeller and the lower impeller, so that the structure can be simplified, the weight is reduced, and meanwhile, the complexity of the die is effectively reduced.
In fig. 5, 3 nozzle holders for mounting nozzles are provided on the 3 differently oriented sides of the support holder, wherein the left nozzle holder 15 is open in its interior and is provided with a nozzle 16, and the remaining upper and right 2 are reserved nozzle holders 18. The nozzle can be mounted by selecting a nozzle seat in a certain direction when in use. The inner cavity of the reserved nozzle seat is in a closed state when the reserved nozzle seat is not used, so that leakage is prevented. When the nozzle is needed to be used, the closed structure of the reserved nozzle seat inner cavity is opened, and the used nozzle seat inner cavity is closed and stopped.
When the nozzle is mounted, the nozzle 16 is screwed to the nozzle holder 15 so that the central axis of the nozzle and the central axis of the nozzle holder are maintained on the same axis, and the nozzle orifice of the nozzle is directed toward the blade of the drive wheel.
When the engine oil pump works, the outer end of the nozzle 16 is connected with an engine oil pipeline, the oil from the engine oil pump is sprayed out through the nozzle opening of the nozzle 16, and the sprayed oil is sprayed to the driving blades around the driving wheels.
In order to make the nozzle make the driving wheel rotate better through the impact force, the central axis of the nozzle and the central axis of the driving wheel deviate from a set distance in design, and the central axis of the nozzle seat and the central axis of the nozzle are arranged coaxially in design and manufacture so as to ensure that the central axis of the nozzle after installation is unchanged. In the embodiment, the distance between the central axis of the nozzle and the central axis of the driving wheel is 21 mm-22 mm, the end face of the nozzle is opposite to the driving wheel blade, and the distance between the central axis of the nozzle and the central axis of the driving wheel is 4 mm-6 mm, so that the hydraulic oil can enable the driving wheel to rotate at a high speed with a strong spraying force.
An oil drain port 20 is arranged at the lower part of the shell of the supporting seat, a mounting surface 28 and a mounting hole 29 are arranged around the oil drain port, a sealing groove is arranged on the mounting surface, and a sealing gasket 30 is arranged in the groove. The supporting seat is connected and fastened with the mounting surface on the engine through mounting holes around the mounting surface through bolts, on one hand, an oil drain port is connected with a relevant interface of the engine, so that the injected engine oil flows back to an oil pan of the engine; on the other hand, the oil-gas separation device is fixed on the engine through bolts.
3. Air inlet channel and air outlet channel
The internal structure of the oil-gas separation device of the present embodiment may be divided into an inlet channel 23 and an outlet channel 24 according to the channels through which the oil-containing gas and the separated clean gas pass.
The inlet channel 23 is a channel for the oil-containing gas to enter into the oil-gas separation chamber, and the outlet channel 24 is a channel for the separated clean gas to exit from the oil-gas separation chamber.
In order to be able to see the inlet and outlet channels clearly, fig. 6 is rotated in the direction E-E and fig. 7 is obtained. In fig. 7, the air inlet channel 23 is a hollow structure passing through the air inlet hole located at the top end of the cavity of the outer housing and arranged at the inner side of the upper bearing seat, the hollow part of the upper pressing plate, and the middle of each separating blade in the separating blade group from the air inlet interface 3, and is always communicated to the middle space of the adjacent separating blade.
The air outlet channel 24 is a space around the separation blade group from the oil-gas separation cavity, and is communicated to the air outlet port 3 all the way through the air outlet hole 27 positioned at the top end of the inner cavity of the outer shell and arranged at the outer side of the upper bearing seat, the inner cavity 401 of the pressure regulating valve 4 and the valve port 402 of the pressure regulating valve.
The upper bearing seat and the upper pressing plate are connected in a sealing way, so that the air inlet channel 23 and the air outlet channel 24 are isolated from each other.
In fig. 3, a circle of upward annular protrusions are provided on the periphery of the upper platen, and the annular protrusions are connected with the side wall of the upper bearing seat in a gap sealing structure. A hollow part is arranged in the middle of the upper pressing plate and is just below an air inlet hole arranged on the inner side of the upper bearing seat.
In the oil-gas separation chamber 6, the present embodiment uses high-speed rotation of the oil-gas separation mechanism to separate the inlet passage and the outlet passage from each other. Because the separation blades rotate at a high speed when the oil-gas separation mechanism works, when the oil-containing gas passes through the gaps of the blades, the oil molecules are thrown out to the side wall of the outer shell and flow downwards along the inner wall of the outer shell due to gravity, and the separated clean gas enters the oil-gas separation cavity (namely the peripheral space of the oil-gas separation mechanism) from the gaps between every two adjacent separation blades by virtue of the centrifugal action of the separation blades rotating at a high speed and enters the air outlet channel 24, and the clean gas cannot reversely return to the air inlet channel 23 due to the centrifugal force.
In order to ensure the tightness of the oil-gas separation cavity formed by the outer shell and the inner shell, the following sealing measures are adopted in the structure:
1. And a gap sealing structure is formed between the upper end of the oil-gas separation cavity and the upper pressing plate through an upper bearing seat. The concrete sealing structure is as follows: the top end of the inner cavity of the outer shell 1 (namely the upper end of the oil-gas separation cavity) is provided with an upper bearing seat, the upper part of the upper pressing plate is provided with an upward annular ring of bulges, and the annular bulges and the outer side of the lower end of the side wall of the upper bearing seat form clearance fit to form a clearance sealing structure.
2. The lower end of the oil-gas separation cavity is provided with a clearance sealing structure formed by a lower bearing seat and a driving wheel. The concrete sealing structure is as follows: the lower end of the inner cavity of the inner shell 7 (namely the lower end of the oil-gas separation cavity) is provided with a lower bearing seat, the lower end of the lower bearing seat is provided with a circle of boss protruding downwards, the upper end of the driving wheel 11 is provided with a ring groove matched with the boss, the outer side of the circle of boss at the lower end of the lower bearing seat is just embedded into the ring groove at the upper end of the driving wheel, and the lower end of the lower bearing seat and the ring groove form clearance fit to form a clearance sealing structure.
3. The periphery of the oil-gas separation cavity is connected with the inner wall of the lower part of the outer shell in a sealing way through 2 sealing rings by the outer edge of the inner shell.
The working process comprises the following steps:
the engine oil hydraulic pipe is communicated to the nozzle 16, the hydraulic oil is sprayed to the driving blades on the driving wheel 11 through the nozzle, the hydraulic energy is converted into mechanical energy to enable the driving wheel to rotate at a high speed, and the mechanical energy is transmitted to the separating blade group 10 through the center shaft 9, so that each separating blade synchronously rotates at a high speed. The sprayed engine oil gathers downwards in the inner cavity of the supporting seat 14 and finally flows into the engine oil pan through the oil drain port 20 of the supporting seat.
The engine crankcase blowby gas is connected with the air inlet joint 201 through an externally connected air inlet pipeline, incoming oil-containing gas (represented by a single arrow) enters the air inlet joint 2 at the top of the outer shell 1 from the air inlet joint 201, then downwards enters an air inlet hole which is positioned at the top end of the inner cavity of the outer shell (namely the upper end of the oil-gas separation cavity) and is arranged at the inner side of the upper bearing seat, and the oil-containing gas coming out of the air inlet hole sequentially downwards passes through a hollow part on an upper pressing plate which is in sealing connection with the upper bearing seat and the hollow structure of the high-speed rotating separation blade group 10, and finally enters the gap between each separation blade. In fig. 7, an intake passage 23 is formed where the oil-containing gas passes, as indicated by a single arrow.
In the narrow gap between each separating blade, the oil particles in the oil-containing gas collide with each other to make the oil particles continuously become larger, meanwhile, the oil particles are attached to the surfaces of the separating blades, the separating blades rotating at high speed generate larger centrifugal force to throw the oil particles to the inner wall of the outer shell, the oil particles continuously gather on the inner wall of the outer shell, finally, the oil flowing downwards under the action of gravity into the concave inner cavity in the middle of the horn-shaped inner shell 7 gathers, finally, the engine oil gathered in the concave inner cavity of the horn-shaped flows into the inner cavity of the lower supporting seat 14 through the one-way valve 19, and finally flows into the engine oil pan along the slope-shaped bottom of the supporting seat together with the engine oil after the driving wheel is sprayed.
The oil-containing gas is separated by oil and gas of the separating blades rotating at high speed, the separated clean gas (represented by double arrow) enters a space between the periphery of the oil-gas separating mechanism and the inner wall of the outer shell from the gap of each separating blade, enters an inner cavity 401 of a pressure regulating valve 4 communicated with the gas outlet hole 27 arranged at the top end of the inner cavity of the outer shell and at the outer side of the upper bearing seat, after being regulated by the pressure regulating valve, the clean gas coming out from a valve port 402 of the pressure regulating valve passes through an air outlet joint 301 arranged on an air outlet interface 3, and finally enters an air inlet channel of the engine from an air outlet pipeline connected with the air outlet joint 301. In fig. 7, a gas outlet channel 24 is formed where the clean gas passes, as indicated by double arrows.
When the centrifugal oil-gas separation device of the present embodiment is connected to an engine, it is necessary to connect the air inlet connector 201 to the crankshaft ventilation exhaust port of the engine through a pipe, then connect the air outlet connector 301 to the air inlet channel of the engine through a pipe, then connect the oil drain port 20 of the support seat to the engine oil pan, and connect the nozzle 16 to the hydraulic circuit of the engine through a hydraulic pipe, thereby completing the connection and installation of the centrifugal oil-gas separation device of the present embodiment to the engine.
The centrifugal oil-gas separator of the present embodiment and the engine including the same are both installed and used in a known manner.
The embodiments of the present invention described above do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention as set forth in the appended claims.
Claims (6)
1. The centrifugal oil-gas separation device is characterized by comprising an outer shell, an inner shell and an oil-gas separation mechanism;
The outer shell is bell-shaped, the top of the outer shell is closed, the opening of the outer shell is downward, the inner cavity of the outer shell is hollow, the inner wall of the outer shell is close to the opening end and is in sealing connection with the outer edge of the inner shell, and a closed cavity between the inner cavities of the outer shell and the inner shell is an oil-gas separation cavity;
The top end of the inner cavity of the outer shell is provided with a first bearing seat, and the first bearing seat is a circle of annular protrusions facing the inner cavity of the outer shell;
an air inlet interface is arranged on one side of the top of the outer shell and is communicated with an air inlet hole which is arranged at the top end of the inner cavity of the outer shell and is positioned at the inner side of the first bearing seat;
an air outlet interface is arranged on the other side of the top of the outer shell body and is communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell body and is positioned at the outer side of the first bearing seat;
An oil-gas separation mechanism is arranged in the middle of the oil-gas separation cavity;
the oil-gas separation mechanism comprises a center shaft, a first pressing plate, a second pressing plate and a separation blade group;
the inner side of the first bearing seat is provided with a bearing mounting hole, and one end of the center shaft is connected with the bearing mounting hole through a bearing;
The separating blade group is fixed in the middle of the middle shaft by a first pressing plate sleeved at one end of the middle shaft and a second pressing plate sleeved at the other end of the middle shaft;
The first pressing plate is also in sealing connection with the side wall of the annular bulge of the first bearing seat, and the middle of the first pressing plate is a hollow part;
The middle of each separation blade in the separation blade group is provided with a hollow structure, and the hollow structure is communicated with gaps among the separation blades;
the other end of the middle shaft is connected with a second bearing seat arranged in the middle of the inner cavity of the inner shell through another bearing, and the other end of the middle shaft penetrates through the second bearing seat to extend outwards from the oil-gas separation cavity;
the air inlet hole which is arranged at the top end of the inner cavity of the outer shell and positioned at the inner side of the first bearing seat is sequentially communicated with the hollow part of the first pressing plate and the hollow structure in the middle of each blade in the separation blade group;
the peripheral space of the separation blade set is communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell and is positioned at the outer side of the first bearing seat;
the occupied area of the bearing mounting hole is smaller than the inner side area of the first bearing seat, and the air inlet hole is arranged on the inner side of the first bearing seat and is positioned on the outer side of the bearing mounting hole;
the periphery of the edge of the first pressing plate is provided with an annular bulge, and the annular bulge is connected with the side wall of the first bearing seat through a gap sealing structure;
The device also comprises a supporting seat; the supporting seat is a basin-shaped shell with a single end opening and a slope bottom; the open end of the supporting seat is connected with the open end of the outer shell, and the other end of the middle shaft extending out of the oil-gas separation cavity is positioned in the inner cavity of the supporting seat;
At least 2 nozzle seats for installing nozzles are arranged on the side part of the supporting seat, wherein one nozzle seat is opened in an inner cavity and is provided with the nozzles, and the rest nozzle seats are reserved nozzle seats with closed inner cavities for standby;
the other end of the center shaft is fixedly connected with a driving wheel, the center shaft of the nozzle arranged in the inner cavity of the nozzle seat and the center shaft of the driving wheel deviate from a set distance, and the nozzle opening of the nozzle faces to the blade of the driving wheel.
2. The centrifugal oil-gas separation device according to claim 1, wherein the top of the outer casing is further provided with a pressure regulating valve; the inner cavity of the pressure regulating valve is communicated with the air outlet hole, and the air outlet hole is communicated with the air outlet interface through the inner cavity and the valve port of the pressure regulating valve.
3. The centrifugal oil-gas separation device according to claim 1, wherein the first pressing plate provided at one end of the separation blade group is provided with a positioning cam facing the separation blade group, and the positioning cam is embedded into a positioning hole on the separation blade at the middle edge of the separation blade group so that the separation blade group does not shift along with the synchronous rotation of the first pressing plate;
and a check ring is clamped in an annular groove arranged on the center shaft, and the check ring tightly pushes a compression spring against the other end of the separation blade set through a second pressing plate.
4. The centrifugal oil and gas separation device of claim 1, wherein the inner housing is a horn-shaped member opening toward the oil and gas separation chamber, and an outer edge of the horn-shaped member is connected to an inner wall of the outer housing through a seal.
5. The centrifugal oil and gas separation device of claim 1, wherein the drive wheel comprises a first impeller and a second impeller; the first boss in the middle of the first impeller is embedded into the central groove on the second boss in the middle of the second impeller, and the convex wedge at the edge of the first boss is embedded into the groove at the edge of the central groove of the second boss to be positioned; the central hole of the first boss and the central groove of the second boss are internally provided with a step hole with smaller diameter which is connected with the center shaft in a penetrating way.
6. The engine provided with the centrifugal oil-gas separation device according to claim 1, wherein an air inlet port of the centrifugal oil-gas separation device is communicated with a crankshaft ventilation exhaust port of the engine through an air inlet pipeline, an air outlet port of the centrifugal oil-gas separation device is communicated with an air inlet channel of the engine through an air outlet pipeline, a nozzle of the centrifugal oil-gas separation device is communicated with a hydraulic circuit of the engine through a hydraulic pipeline, and an oil drain port is arranged at the bottom of a supporting seat of the centrifugal oil-gas separation device and is communicated with an oil pan of the engine.
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| CN114412643B (en) * | 2022-01-25 | 2024-08-06 | 中国航发贵阳发动机设计研究所 | Multi-stage oil return device integrating oil-gas separation function |
| CN114458416A (en) * | 2022-01-28 | 2022-05-10 | 东风商用车有限公司 | Floating type variable cross-section impeller structure in oil-gas separation system |
| CN115318013B (en) * | 2022-07-05 | 2024-09-03 | 中国航发湖南动力机械研究所 | Centrifugal oil-gas separation structure |
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| CN211900737U (en) * | 2020-01-08 | 2020-11-10 | 安徽威尔低碳科技股份有限公司 | Centrifugal oil-gas separation device and engine |
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| DE202007009913U1 (en) * | 2007-07-13 | 2008-11-20 | Hengst Gmbh & Co.Kg | Separator for separating oil mist from the crankcase ventilation gas of an internal combustion engine and internal combustion engine with a separator |
| CN202273728U (en) * | 2011-10-13 | 2012-06-13 | 东风汽车有限公司 | Oil-gas separation device of engine |
| 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 |
| JP5940569B2 (en) * | 2014-01-30 | 2016-06-29 | アルファ・ラバル・コーポレイト・エービー | Gas purifier separator |
| EP3311923B1 (en) * | 2015-06-19 | 2019-11-27 | Tokyo Roki Co., Ltd. | Oil separator |
| CN105041425B (en) * | 2015-08-05 | 2017-09-12 | 宁海县雄达模塑有限公司 | Automobile engine gs-oil separator |
| CN105221214B (en) * | 2015-10-26 | 2017-09-29 | 潍柴西港新能源动力有限公司 | A kind of gs-oil separator |
| CN110500159B (en) * | 2019-09-10 | 2024-07-05 | 平原滤清器有限公司 | Active oil-gas separator |
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