CN111022152A - Centrifugal oil-gas separation device - Google Patents
Centrifugal oil-gas separation device Download PDFInfo
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- CN111022152A CN111022152A CN202010016120.6A CN202010016120A CN111022152A CN 111022152 A CN111022152 A CN 111022152A CN 202010016120 A CN202010016120 A CN 202010016120A CN 111022152 A CN111022152 A CN 111022152A
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- gas 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
- F01M2013/0422—Separating oil and gas with a centrifuge device
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- General Engineering & Computer Science (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 in a bell jar shape with a closed top, a downward opening and a hollow inner cavity, and the outer shell and the inner shell are connected to form an oil-gas separation cavity for mounting an oil-gas separation mechanism; an air inlet interface arranged on 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 is positioned on the inner side of the first bearing seat; an air outlet port arranged on the other side of the top of the outer shell is communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell and positioned outside the first bearing seat; a first pressure plate sleeved at one end of a middle shaft and a second pressure plate sleeved at the other end of the middle shaft are fixed in the middle of the middle shaft in a separation blade group in the oil-gas separation mechanism; the air inlet is sequentially communicated with the hollow part of the upper pressure 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 structure design of the invention accords with the discharge rule that gas is light and easy to go upwards, oil molecules are heavy and easy to go downwards, and the invention is reasonable and compact.
Description
Technical Field
The invention relates to a centrifugal oil-gas separation device and an engine provided with the centrifugal oil-gas separation device.
Background
Along with the higher requirements of the automobile national on the vehicle emission regulations, the requirements on the separation efficiency of the crankshaft ventilation oil-gas separator are higher and higher in order to reduce the pollution of a moving source of an engine, and the separation efficiency of the conventional labyrinth oil-gas separation and filtering oil-gas separation cannot meet the requirements.
At present, a common centrifugal oil-gas separator is generally provided with an air inlet port at the upper end of a shell and an air outlet port at the side surface or the lower surface of the shell, and the design enables a walking route of gas after oil-gas separation to be from top to bottom. Because the gas is lighter, the rule is that the gas is easy to go upwards and difficult to go downwards, the prior art has the defect that the design is not in line with the rule of gas operation, and the separated clean gas is possibly discharged from a gas outlet instead or the oil-containing gas is 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 the lower surface of the shell, so that the occupied space of an external pipeline is large, and the centrifugal oil-gas separator cannot adapt to the use occasions with small installation space. Meanwhile, the air outlet channel is arranged below or on the side surface of the shell, so that the route is long, the structure is complex, and the manufacturing cost is relatively high.
Disclosure of Invention
The invention aims to provide a centrifugal oil-gas separation device.
The invention also aims to solve the technical problem of providing an engine provided with the centrifugal oil-gas separation device.
For the centrifugal oil-gas separation device, the technical scheme adopted by the invention is that the centrifugal oil-gas separation device comprises an outer shell, an inner shell and an oil-gas separation mechanism;
the outer shell is in a bell jar shape with a closed top, a downward opening and a hollow inner cavity, the end, close to the opening, of the inner wall of the outer shell is hermetically connected with the outer edge of the inner shell, and a closed cavity between the inner cavity of the outer shell and the inner cavity of 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 on 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 and communicated with an air outlet hole which is arranged at the top end of the inner cavity of the outer shell and positioned outside 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 middle shaft, a first pressing plate, a second pressing plate and a separation blade group;
a bearing mounting hole is formed in the inner side of the first bearing seat, and one end of the middle shaft is connected with the bearing mounting hole through a bearing;
the first pressure plate sleeved at one end of the middle shaft and the second pressure plate sleeved at the other end of the middle shaft are fixed in the middle of the middle shaft;
the first pressure plate is also connected with the side wall of the annular bulge of the first bearing seat in a sealing way, and the middle part of the first pressure 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 gap between each separation blade;
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 out of 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 is 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 positioned outside the first bearing seat.
Preferably, the occupied area of the bearing mounting hole is smaller than the inner area of the first bearing seat, and the air inlet hole is formed in the inner side of the first bearing seat and located on the outer side of the bearing mounting hole.
Preferably, a circular protrusion is arranged around the edge of the first pressing plate, and the circular protrusion is connected with the side wall of the first bearing seat in 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 of the pressure regulating valve and the valve port.
Preferably, a first pressure plate arranged at one end of the separation blade group is provided with a positioning convex wedge facing the separation blade group, and the positioning convex wedge is embedded into a positioning hole on the separation blade at the edge end in the separation blade group, so that the separation blade group does not shift along with the synchronous rotation of the first pressure plate;
a retainer ring is clamped in a ring groove formed in the middle shaft, and a compression spring is tightly pushed against the other end of the separation blade group through a second pressing plate by the retainer ring.
Preferably, the inner shell is a horn-shaped component with an opening facing the oil-gas separation chamber, and the outer edge of the horn-shaped component is connected with the inner wall of the outer shell through a sealing member.
Preferably, the device also comprises a supporting seat; the supporting seat is a basin-shaped shell with an opening at one end 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;
the side part of the supporting seat is provided with at least 2 nozzle seats for installing nozzles, wherein the inner cavity of one nozzle seat is opened and is provided with a nozzle, and the rest nozzle seats are reserved and the inner cavities of the rest nozzle seats are closed for standby;
the other end of the middle shaft is fixedly connected with a driving wheel, the central shaft of a nozzle arranged in the inner cavity of the nozzle seat deviates a set distance from the central shaft of the driving wheel, and the nozzle of the nozzle faces to the blades of the driving wheel.
As a further preference, the drive wheel comprises a first impeller and a second impeller; a first boss in the middle of the first impeller is embedded into a central groove on a second boss in the middle of the second impeller, and a convex wedge at the edge of the first boss is embedded into a groove at the edge of the central groove of the second boss for positioning; the central hole of the first boss and the central groove of the second boss are internally provided with step holes with smaller diameters which are connected with the middle 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 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 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 outlet is arranged at the bottom of a supporting seat of the centrifugal oil-gas separation device and communicated with an oil pan of the engine.
The invention has the beneficial effects that:
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 to be subjected to oil-gas separation, and clean gas after the oil-gas separation is discharged from the top of the shell. The centrifugal oil-gas separation device has the advantages that the gas inlet channel and the gas outlet channel are reasonably arranged and sealed and isolated structurally, so that the design of the gas channel accords with the discharge rule that gas is light and easy to go upwards, oil molecules are heavy and easy to go downwards, the centrifugal oil-gas separation device has the advantages that the gas channels for gas inlet and gas outlet are smooth and do not interfere with each other, the overall structure is more compact, an engine provided with the centrifugal oil-gas separation device can adapt to vehicle types with different discharge capacities and different interfaces structurally, and meanwhile, the cost is reduced due to the simplified structure.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
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 present invention, taken in the direction of section line a-a of fig. 1.
Fig. 3 is a sectional view B-B of fig. 2.
Fig. 4 is a cross-sectional view C-C of fig. 2.
Fig. 5 is a cross-sectional view D-D of fig. 2.
Fig. 6 is a top view of an embodiment of the present invention.
Fig. 7 is a cross-sectional view E-E of fig. 6.
The labels in the figure are: 1-outer shell, 2-air inlet interface, 201-air inlet interface, 3-air outlet interface, 301-air outlet interface, 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 set, 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 outlet, 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 embodiments, it is to be understood that the terms "upper", "lower", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships indicated in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the illustrated devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention.
FIG. 1 is a centrifugal oil-gas separation device. It is composed of an outer shell 1, an inner shell 7, a centrifugal separation mechanism and a supporting seat 14.
First, shell body, interior casing, oil-gas separation chamber and oil-gas separation mechanism
The outer shell 1 is in a bell jar shape with one open end, the top of the outer shell is closed, the open end faces downwards, and the inner cavity is hollow. The inner wall of the opening end of the outer shell 1 is hermetically connected with the outer edge of the inner shell 7, and the closed cavity between the inner wall of the outer shell and the inner wall of the inner shell is an oil-gas separation cavity.
An upper bearing seat 5 is arranged at the top end of the inner cavity of the outer shell, and the upper bearing seat is a circle of circular bulge facing the inner cavity of the outer shell. The upper bearing seat is provided with a mounting hole for the upper bearing 501.
Fig. 2 is a cross-sectional view of the centrifugal oil-gas separator of fig. 1 taken along the axis of the inlet connection 2 and along two parallel sections of the central axis of the nozzle, and through the central axes of the outer casing 1 and the inner casing 7 in a step-wise manner. In fig. 2, an air inlet port 2 and an air outlet port 3 are respectively provided at the top of the outer case. 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 interface 3 is communicated with an air outlet 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, an air inlet joint 201 is arranged at the outer end of the air inlet interface 2, and an air outlet joint 301 is arranged at the outer end of the air outlet interface 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, 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 a connection screw hole of the outer shell through a screw.
In fig. 4, the air inlet interface 2 and the air outlet interface 3 are arranged on the same central axis and the opening directions thereof are deviated from each other, wherein the air inlet interface is located on the left side of the outer housing in the figure, and the air outlet interface is located on the right side of the outer housing in the figure, so that external pipelines connecting the air inlet interface and the air outlet interface are not interfered with each other.
The top end of the inner cavity of the outer shell body separates an air inlet hole and an air outlet hole through an upper bearing seat, the air inlet hole is arranged on the inner side of the upper bearing seat, and the air outlet hole 27 is arranged on the outer side of the upper bearing seat.
In fig. 6, the top of the outer casing is provided with a pressure regulating valve, the pressure regulating valve is mounted in a pressure regulating valve mounting seat, the pressure regulating valve mounting seat is arranged at a position deviated to one side of the air outlet interface 3, and an air outlet hole 27 is arranged below the pressure regulating valve mounting seat. Due to the structural design, the air outlet hole 27 arranged on the outer side of the upper bearing seat is convenient to communicate with 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 interface 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 closed 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 is concave, so that the engine oil separated by oil gas can be gathered.
The oil-gas separation mechanism is arranged in the oil-gas separation cavity 6 and mainly comprises a middle shaft 9, an upper pressure plate 25, a lower pressure 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 which is positioned in the oil-gas separation cavity and is positioned at the inner side of the upper bearing seat 5 at the top end of the inner cavity of the outer shell. 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 in the central part of the inner shell in the oil-gas separation cavity.
The separation blade group 10 is formed by a plurality of separation blades passing through the 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 the hollow out construction of intercommunication each other, and the oil gas that gets into from the interface that admits air can get into the space between each separation blade from these hollow out constructions.
The separation blade group 10 is positioned and fixed by an upper pressure plate 25 and a lower pressure plate 26 which are arranged on a central shaft in the following way:
the upper pressure plate 25 is arranged at the upper end of the middle shaft, a positioning convex wedge protruding downwards is arranged on the upper pressure plate, and a positioning hole with a shape matched with that of the separation blade at the uppermost end in the separation blade group is arranged on the separation blade. When the upper pressure plate is contacted with the separation blade, the positioning convex wedge is just embedded into the positioning hole on the separation blade, so that the separation blade group is positioned, and all the separation blades of the separation blade group can not shift along with the synchronous rotation of the upper pressure plate.
The lower pressure plate 26 is arranged at the lower part of the middle shaft, a compression spring penetrates through the middle shaft between the lower pressure plate 26 and the lower bearing 801, the upper end of the compression spring is upwards propped against the lower pressure plate from the lower surface of the lower pressure plate, the lower end of the compression spring is supported by a retainer ring, the retainer ring is positioned through an annular groove arranged on the main shaft, the compression spring provides pressing force to upwards prop the lower pressure plate and the separation blade group, and the separation blade group and the upper pressure plate are positioned through contact. When the middle shaft drives the separation blade group to rotate, the upper pressure plate, the lower pressure plate and the separation blade group rotate synchronously.
In addition, a magnet 17 for measuring the rotating speed of the separation blade is arranged on 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 using 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 an oil pan of the engine to the oil-gas separation mechanism for oil-gas separation.
A one-way valve 19 is arranged at the lowest position of the horn-shaped inner cavity of the inner shell 7, the one-way valve adopts an umbrella-shaped valve structure, and the function of the one-way valve is to guide the separated engine oil gathered in the horn-shaped inner cavity of the inner shell into the inner cavity of the supporting seat 14.
Secondly, a supporting seat, a driving wheel and a nozzle
The support base 14 is located at the lower part of the whole centrifugal oil-gas separation device and is used for accommodating and mounting a driving mechanism of the oil-gas separation mechanism.
The supporting seat is a basin-shaped shell with an open upper end and a closed bottom, and the open end of the supporting seat is connected with the open end of the outer shell 1 through a fastening bolt 21.
The lower end of the middle shaft 9 passes through the middle of the lower bearing and extends from the oil-gas separation cavity formed by the inner shell to the middle of the inner cavity of the supporting seat. The lower end of the middle shaft is fixedly connected with a driving wheel 11 which 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 circular upper boss, the outer edge of the upper boss is symmetrically provided with two convex wedges, and the center of the upper boss is provided with a central hole. The middle of the lower impeller 13 is provided with a lower boss, the center of the lower boss is provided with a circular step hole with a large upper part and a small lower part, and the outer edge of the large step hole is symmetrically provided with two grooves.
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 shapes and the positions of the two convex wedges on the upper boss and the two grooves on the lower boss are matched. When the upper impeller and the lower impeller are assembled into a driving wheel, the circular upper boss of the upper impeller is just embedded into the large step hole of the lower impeller, and the two convex wedges at the outer edge of the upper boss are wedged into the two grooves at the outer edge of the large circular step hole on the lower boss for positioning. In addition, the middle shaft 9 respectively passes through the central hole of the upper impeller and the small step hole at 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 the driving wheel, the 16 driving blades are uniformly distributed and arranged along the periphery of the driving wheel.
The driving wheel 11 can convert the hydraulic energy sprayed from the nozzle 16 into mechanical energy rotating at high speed, and drives the separation blade set to rotate at high speed through the middle shaft, and the separation blade set rotating at high speed forms the centrifugal force of oil-gas separation.
The structure is not only simplified, and weight is reduced, effectively reduces the mould complexity simultaneously to the structure is assembled of impeller about the drive wheel adopts.
In fig. 5, 3 nozzle holders for installing nozzles are respectively arranged on 3 lateral surfaces of the support base in different directions, wherein the inner cavity of one nozzle holder 15 on the left side is opened and is provided with a nozzle 16, and the rest 2 on the upper side and the right side are reserved nozzle holders 18. When in use, the nozzle seat in a certain direction can be selected to install the nozzle. When the reserved nozzle seat is not used, the inner cavity of the reserved nozzle seat is in a closed state so as to prevent leakage at the position. When the nozzle is required to be used, the sealing structure of the reserved nozzle seat inner cavity is opened, and the used nozzle seat inner cavity is sealed and stopped.
When the nozzle is installed, the nozzle 16 is screwed to the nozzle holder 15 so that the central axis of the nozzle is aligned with the central axis of the nozzle holder and the nozzle opening of the nozzle faces the vanes of the drive wheel.
When the hydraulic oil spraying device works, the outer end of the nozzle 16 is connected with a hydraulic oil pipeline of an engine, hydraulic oil from an oil pump of the engine is sprayed out through a nozzle of the nozzle 16, and the sprayed hydraulic oil is sprayed to driving blades around a driving wheel.
In order to enable the nozzle to better rotate the driving wheel through impact force, the central axis of the nozzle is deviated from the central axis of the driving wheel by a set distance in design, and the central axis of the nozzle seat and the central axis of the nozzle are arranged to be coaxial in design and manufacture so as to ensure that the central axis of the nozzle after installation is unchanged. In the embodiment, the deviation distance between the central axis of the nozzle and the central axis of the driving wheel is 21 mm-22 mm, the nozzle end surface of the nozzle is opposite to the driving wheel blade, and the distance between the nozzle end surface and the driving wheel blade is 4 mm-6 mm, so that the driving wheel can rotate at a high speed by hydraulic oil with a strong injection force.
An oil discharge port 20 is provided at the lower portion of the housing of the support base, a mounting surface 28 and a mounting hole 29 are provided around the oil discharge port, a seal groove is provided at the mounting surface, and a gasket 30 is mounted in the groove. The supporting seat is connected and fastened with the mounting surface on the engine through mounting holes penetrating bolts around the mounting surface, and on one hand, the oil drain port is connected with a related interface of the engine, so that the injected engine oil flows back to an oil pan of the engine; and on the other hand, the oil-gas separation device is fixed on the engine through bolts.
Third, air inlet channel and air outlet channel
According to the channel through which the oil-containing gas and the separated clean gas pass, the internal structure of the oil-gas separation device of the present embodiment can be divided into an inlet channel 23 and an outlet channel 24.
The gas inlet channel 23 is a channel for oil-containing gas to enter into the oil-gas separation chamber, and the gas outlet channel 24 is a channel for clean gas to exit from the oil-gas separation chamber.
In order to be able to see the inlet and outlet channels, FIG. 6 is a rotated section in the direction E-E and FIG. 7 is obtained. In fig. 7, the air inlet channel 23 is communicated from the air inlet port 3 to the gap between the adjacent separation blades sequentially through an air inlet hole located at the top end of the inner cavity of the outer shell and arranged at the inner side of the upper bearing seat, the hollow part of the upper press plate, and the hollow structure in the middle of each separation blade in the separation blade group.
The air outlet channel 24 is a space around the separation blade group in the oil-gas separation cavity, and is communicated to the air outlet port 3 through an air outlet hole 27 which is positioned at the top end of the inner cavity of the outer shell and is arranged outside the upper bearing seat, an inner cavity 401 of the pressure regulating valve 4 and a valve port 402 of the pressure regulating valve in sequence.
In this embodiment, the upper bearing seat is connected to the upper pressure plate in a sealing manner, so as to isolate the air inlet channel 23 from the air outlet channel 24.
In fig. 3, the periphery of the upper platen is provided with a ring of upward annular protrusions, and the annular protrusions are connected with the side wall of the upper bearing seat in a clearance sealing structure. The middle of the upper pressure plate is provided with a hollow part which is just positioned 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 utilizes the high-speed rotation of the oil-gas separation mechanism to separate the inlet channel and the outlet channel from each other. Because the separation blades rotate at high speed when the oil-gas separation mechanism works, when oil-containing gas passes through the gaps of the blades, oil molecules are thrown out of 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 gap between every two adjacent separation blades and enters the gas outlet channel 24 under the centrifugal action of the separation blades rotating at high speed, and the clean gas cannot reversely return to the gas inlet channel 23 due to the action of centrifugal force.
In order to ensure the tightness of the oil-gas separation chamber formed by the outer shell and the inner shell, the present embodiment adopts the following sealing measures in structure:
1. the upper end of the oil-gas separation cavity and the upper pressure plate form a gap sealing structure through an upper bearing seat. The specific sealing structure is as follows: an upper bearing seat is arranged at the top end of the inner cavity of the outer shell 1 (namely the upper end of the oil-gas separation cavity), an upward annular ring-shaped bulge is arranged at the upper part of the upper pressure plate, and the annular bulge 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 forms a clearance sealing structure with the driving wheel through a lower bearing seat. The specific 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 downward protruding boss, the upper end of the driving wheel 11 is provided with an annular 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 annular groove at the upper end of the driving wheel, and the lower bearing seat and the annular groove form clearance fit to.
3. The periphery of the oil-gas separation cavity is hermetically connected with the inner wall of the lower part of the outer shell by the outer edge of the inner shell through 2 sealing rings.
The working process is as follows:
the engine oil hydraulic pipeline is communicated with the nozzle 16, hydraulic oil is sprayed to the driving blades on the driving wheel 11 through the nozzle, 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 separation blade group 10 through the middle shaft 9, so that all the separation blades synchronously rotate at a high speed. The injected oil is collected downward in the inner cavity of the support base 14 and finally flows into the engine oil pan through the oil drain port 20 of the support base.
The engine crankcase blowby is connected with the air inlet connector 201 through an external air inlet pipeline, incoming oil-containing gas (shown by a single arrow) enters the air inlet connector 2 at the top of the outer shell 1 from the air inlet connector 201, then enters an air inlet hole which is positioned at the top end of an inner cavity of the outer shell (namely the upper end of an oil-gas separation cavity) and is arranged at the inner side of the upper bearing seat downwards, and the oil-containing gas coming out of the air inlet hole sequentially passes through a hollow part on an upper pressure plate which is hermetically connected with the upper bearing seat and a hollow structure of the separation blade group 10 which rotates at a high speed downwards and finally enters gaps among the separation blades. In fig. 7, an intake passage 23 is formed where the oil-containing gas indicated by a single arrow passes.
In the narrow and small space between each separation blade, the oil particles in the oil-containing gas can collide with each other to make the oil particles become bigger continuously, meanwhile, the oil particles are attached to the surface of the separation blade, the separation blade rotating at high speed generates larger centrifugal force to throw the oil particles to the inner wall of the outer shell, the oil particles are gathered on the inner wall of the outer shell continuously, finally, the oil particles flow downwards to the concave inner cavity in the middle of the horn-shaped inner shell 7 under the action of gravity to gather, finally, the engine oil gathered in the concave inner cavity of the horn-shaped inner shell flows into the inner cavity of the supporting seat 14 below through the one-way valve 19, and finally, the engine oil and the engine oil sprayed on the driving wheel flow into the engine oil pan from.
The oil-gas separation of the oil-containing gas by the separation blades rotating at high speed, the separated clean gas (indicated by double arrows) enters the space between the periphery of the oil-gas separation mechanism and the inner wall of the outer shell from the gaps of the separation blades, enters the inner cavity 401 of the pressure regulating valve 4 communicated with the outer cavity from the air outlet 27 which is positioned at the top end of the inner cavity of the outer shell and is arranged outside the upper bearing seat, the clean gas which comes out from the valve port 402 of the pressure regulating valve passes through the air outlet joint 301 arranged on the air outlet joint 3 after being regulated by the pressure regulating valve, and finally enters the air inlet channel of the engine from the air outlet pipeline connected with the air outlet joint 301. In fig. 7, the clean gas path indicated by the double arrow forms an outlet channel 24.
When the centrifugal oil-gas separation device of the present embodiment is connected to an engine, the air inlet connector 201 needs to be communicated with a crankshaft ventilation exhaust port of the engine through a pipeline, the air outlet connector 301 needs to be communicated with an air inlet channel of the engine through a pipeline, the oil outlet 20 of the support seat needs to be communicated with an engine oil pan, and the nozzle 16 needs to be communicated with a hydraulic circuit of the engine through a hydraulic pipeline, so that the installation of the centrifugal oil-gas separation device of the present embodiment in connection with the engine is completed.
The centrifugal oil-gas separator and the engine comprising the centrifugal oil-gas separator of the embodiment are installed and used in a known manner.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. A 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 in a bell jar shape with a closed top, a downward opening and a hollow inner cavity, the end, close to the opening, of the inner wall of the outer shell is hermetically connected with the outer edge of the inner shell, and a closed cavity between the inner cavity of the outer shell and the inner cavity of 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 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 communicated with an air inlet hole which is arranged at the top end of an inner cavity of the outer shell and is positioned on 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 and communicated with an air outlet hole which is arranged at the top end of an inner cavity of the outer shell and positioned outside 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 middle shaft, a first pressing plate, a second pressing plate and a separation blade group;
a bearing mounting hole is formed in the inner side of the first bearing seat, and one end of the middle shaft is connected with the bearing mounting hole through a bearing;
the first pressure plate sleeved at one end of the middle shaft and the second pressure plate sleeved at the other end of the middle shaft are fixed in the middle of the middle shaft;
the first pressure plate is also connected with the side wall of the annular bulge of the first bearing seat in a sealing way, and the middle part of the first pressure 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 out of 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 is 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 positioned outside the first bearing seat.
2. The centrifugal oil-gas separator according to claim 1, wherein the bearing mounting holes occupy a smaller area than the inner area of the first bearing seat, and the air inlet holes are provided inside the first bearing seat and outside the bearing mounting holes.
3. The centrifugal oil-gas separation device according to claim 1, wherein a circular ring-shaped protrusion is arranged on a periphery of an edge of the first pressure plate, and the circular ring-shaped protrusion is connected with a side wall of the first bearing seat by a gap sealing structure.
4. The centrifugal oil-gas separation device according to claim 1, wherein a pressure regulating valve is further provided at the top of the outer casing; the inner cavity of the pressure regulating valve is communicated with an air outlet hole, and the air outlet hole is communicated with an air outlet interface through the inner cavity of the pressure regulating valve and the valve port.
5. The centrifugal oil-gas separator according to claim 1, wherein said first presser plate provided at one end of said separating blade group is provided with a positioning boss facing said separating blade group, said positioning boss being fitted into a positioning hole of said separating blade at the middle end of said separating blade group so that said separating blade group is rotated synchronously with the first presser plate without displacement;
a retainer ring is clamped in a ring groove formed in the middle shaft, and a compression spring is tightly pushed against the other end of the separation blade group through a second pressing plate by the retainer ring.
6. The centrifugal oil-gas separator according to claim 1, wherein said inner casing is a trumpet member opened to the oil-gas separation chamber, and an outer edge of the trumpet member is connected to an inner wall of the outer casing by a seal.
7. The centrifugal oil-gas separation device of claim 1, further comprising a support base; the supporting seat is a basin-shaped shell with an opening at one end and a slope-shaped bottom; the opening end of the supporting seat is connected with the opening 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;
the side part of the supporting seat is provided with at least 2 nozzle seats for installing nozzles, wherein the inner cavity of one nozzle seat is opened and is provided with a nozzle, and the rest nozzle seats are reserved and the inner cavities of the rest nozzle seats are closed for standby application;
the other end of the middle shaft is fixedly connected with a driving wheel, the central shaft of the nozzle arranged in the inner cavity of the nozzle seat deviates a set distance from the central shaft of the driving wheel, and the nozzle of the nozzle faces to the blades of the driving wheel.
8. The centrifugal oil-gas separator device according to claim 7, wherein said drive wheel comprises a first impeller and a second impeller; a first boss in the middle of the first impeller is embedded into a central groove on a second boss in the middle of the second impeller, and a convex wedge at the edge of the first boss is embedded into a groove at the edge of the central groove of the second boss for positioning; and a step hole with smaller diameter is arranged in the central hole of the first boss and the central groove of the second boss and is connected with the middle shaft in a penetrating way.
9. The engine equipped with the centrifugal oil-gas separation device of claim 7, wherein an air inlet 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 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 outlet is arranged at the bottom of a support seat of the centrifugal oil-gas separation device and is communicated with an oil pan of the engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016120.6A CN111022152A (en) | 2020-01-08 | 2020-01-08 | Centrifugal oil-gas separation device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010016120.6A CN111022152A (en) | 2020-01-08 | 2020-01-08 | Centrifugal oil-gas separation device |
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| CN111022152A true CN111022152A (en) | 2020-04-17 |
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| CN202010016120.6A Pending CN111022152A (en) | 2020-01-08 | 2020-01-08 | Centrifugal oil-gas separation device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412643A (en) * | 2022-01-25 | 2022-04-29 | 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 |
| CN115318013A (en) * | 2022-07-05 | 2022-11-11 | 中国航发湖南动力机械研究所 | Centrifugal oil-gas separation structure |
-
2020
- 2020-01-08 CN CN202010016120.6A patent/CN111022152A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412643A (en) * | 2022-01-25 | 2022-04-29 | 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 |
| CN115318013A (en) * | 2022-07-05 | 2022-11-11 | 中国航发湖南动力机械研究所 | Centrifugal oil-gas separation structure |
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Effective date of registration: 20230728 Address after: No.59, fozhang Road, Hefei Economic and Technological Development Zone, Anhui 230000 Applicant after: Anhui Weil Low Carbon Technology Co.,Ltd. Applicant after: Hefei Weilin New Energy Co.,Ltd. Address before: No.59, fozhang Road, Hefei Economic and Technological Development Zone, Anhui 230000 Applicant before: Anhui Weil Low Carbon Technology Co.,Ltd. Applicant before: BEIJING BRANCH, HEFEI WAL FUEL SYSTEMS CO.,LTD. |
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