CN222184888U - Open circulation breathing device and engine - Google Patents
Open circulation breathing device and engine Download PDFInfo
- Publication number
- CN222184888U CN222184888U CN202420205416.6U CN202420205416U CN222184888U CN 222184888 U CN222184888 U CN 222184888U CN 202420205416 U CN202420205416 U CN 202420205416U CN 222184888 U CN222184888 U CN 222184888U
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- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000009423 ventilation Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 88
- 239000003921 oil Substances 0.000 description 31
- 239000002245 particle Substances 0.000 description 29
- 238000001914 filtration Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000003475 lamination Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The utility model relates to the technical field of engines, in particular to an open cycle breathing device and an engine. The open circulation breathing device comprises an active oil-gas separator and a passive oil-gas separator, wherein an air outlet pipe of the active oil-gas separator is communicated with an air inlet pipe of the passive oil-gas separator, the passive oil-gas separator comprises a shell and a filter element, a step is arranged on the inner wall of the shell, the filter element comprises a support frame and a filter medium layer, the support frame comprises a support plate and a support cylinder, the outer diameter of the support plate is larger than the outer diameter of the support cylinder, the support plate is mounted on the step on the inner wall of the shell, the outer wall of the support plate is in sealing fit with the inner wall of the shell, and the filter medium layer is wound on the support cylinder. The utility model solves the problem that the conventional oil-gas separator is difficult to filter PN with the wavelength of more than 10nm in the crankcase blowby gas.
Description
Technical Field
The utility model relates to the technical field of engines, in particular to an open cycle breathing device and an engine.
Background
The exhaust pollutants of the diesel engine are mainly combustion exhaust gas directly exhausted by the exhaust pipe and crankcase blow-by gas, along with the increasingly strict control of the exhaust pipe, the control of the combustion exhaust gas directly exhausted by the exhaust pipe has remarkable effect, the proportion of the pollutants in the crankcase blow-by gas to the total pollutants of the diesel engine is increased, and the crankcase blow-by gas is controlled to further reduce the pollutant emission.
With the increasingly strict requirement on the filtering performance of PN (Particle number) emission of a crankcase, the conventional oil-gas separator is difficult to filter PN above 10nm in the blow-by gas of the crankcase, and the problem of exceeding PN emission of the oil-gas separator is easily caused.
Disclosure of utility model
Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide an open-type circulating breathing device and an engine, so as to solve the problem that the conventional oil-gas separator is difficult to filter PN with the particle size of more than 10nm in crankcase blowby gas.
In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:
The open type circulating breathing device comprises an active oil-gas separator and a passive oil-gas separator, wherein an air outlet pipe of the active oil-gas separator is communicated with an air inlet pipe of the passive oil-gas separator, the passive oil-gas separator comprises a shell and a filter element, a step is arranged on the inner wall of the shell, the filter element comprises a support frame and a filter medium layer, the support frame comprises a support plate and a support cylinder, the outer diameter of the support plate is larger than that of the support cylinder, the support plate is mounted on the step on the inner wall of the shell, the outer wall of the support plate is in sealing fit with the inner wall of the shell, and the filter medium layer is wound on the support cylinder.
Optionally, the lateral surface of backup pad is provided with the recess, the recess is the ring channel, the opening of ring channel deviates from the axle center of backup pad, be provided with the sealing washer in the recess, the sealing washer is extruded in the sealed intracavity that recess and shells inner wall formed.
Optionally, the support frame further includes a bottom plate, the backup pad is located the upper end of support section of thick bamboo, the bottom plate is located the lower extreme of support section of thick bamboo, and bottom plate shutoff support section of thick bamboo bottom opening.
Optionally, the wall of the supporting cylinder is provided with vent holes, the vent holes are arranged along the radial direction, the outer diameter of the bottom plate is larger than that of the supporting cylinder, and the filter medium layer is positioned between the supporting plate and the bottom plate.
Optionally, the filter element further comprises a grabbing piece, the grabbing piece is arranged on the supporting plate, the grabbing piece comprises a holding portion and a connecting portion, the connecting portion is arranged on the supporting plate, and the holding portion is arranged on the connecting portion.
Optionally, the gripping portion is the handle, the handle is annular, connecting portion is the connecting rod, the connecting rod is two at least, the handle passes through the connecting rod and connects in the backup pad.
Optionally, the casing includes upper cover and inferior valve, upper cover and inferior valve can dismantle the connection, the step sets up on the inferior valve inner wall, the backup pad passes through the sealing washer with inferior valve inner wall and seals.
Optionally, the top of the active oil-gas separator is provided with an oil-gas inlet, the bottom of the active oil-gas separator is provided with an oil return port, the side wall of the active oil-gas separator is provided with a first air outlet, the passive oil-gas separator is provided with an air inlet, the side part of the active oil-gas separator is provided with a second air outlet, and the first air outlet of the active oil-gas separator is communicated with the air inlet of the passive oil-gas separator through a connecting pipe.
Optionally, be provided with centrifugal separation structure in the active oil and gas separator, centrifugal separation structure includes centrifugal lamination, axis of rotation and drive wheel, centrifugal lamination installs on the axis of rotation, the drive wheel is connected the axis of rotation, active oil and gas separator lateral wall is provided with the pressure oil import, the pressure oil import orientation the drive wheel.
The embodiment of the utility model also provides an engine, which comprises the open-cycle breathing device.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
1. According to the breathing device, oil drops and larger particles of crankcase ventilation gas are removed through the active separator, small particles are filtered through the passive oil-gas separator, and through the combination of the oil-gas separators with two different particle removal mechanisms, not only can oil drops be separated, but also particles with the particle size of more than 10nm can be effectively removed, PN emission of a crankcase can be effectively reduced, the filtering performance of PN emission of the crankcase is obviously improved, and a technical scheme reserve is provided for the PN emission to meet the requirement of emission regulation upgrading.
2. According to the utility model, through the cooperation of the upper end supporting plate (and the groove), the shell (and the step) and the sealing ring, the filter element can be clamped on the inner wall of the passive oil-gas separator shell and can play a role in sealing.
3. According to the utility model, through the sealing of the supporting plate and the inner wall of the shell and the plugging of the supporting cylinder by the bottom plate, all air inlet can be ensured to be filtered by the filter medium.
Additional aspects of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic view of an open-cycle breathing apparatus according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a passive oil-gas separator provided by an embodiment of the utility model;
FIG. 3 is a schematic illustration of a filter cartridge provided in an embodiment of the present utility model;
FIG. 4 is a schematic illustration of the cooperation of a filter element and a housing provided by an embodiment of the present utility model;
Fig. 5 is a schematic diagram of an active oil-gas separator according to an embodiment of the present utility model;
In the figure, 1, an active oil-gas separator, 11, an oil-gas inlet, 12, a first exhaust port, 13, an oil return port, 14, a centrifugal lamination, 15, a rotating shaft, 16, a driving wheel, 17, a pressure oil inlet, 2, a passive oil-gas separator, 21, an air inlet, 22, a second exhaust port, 23, a shell, 231, an upper cover, 232, a lower shell, 24, a sealing ring, 25, a filter element, 251, a grabbing piece, 2511, a holding part, 2512, a connecting part, 252, a supporting frame, 2521, a supporting plate, 2522, a supporting cylinder, 2523, a bottom plate, 253, a filter medium layer, 3 and a connecting pipe;
The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or groups thereof.
Crankcase ventilation systems are classified into natural ventilation systems (herein referred to as crankcase open circuits) and forced ventilation systems (herein referred to as crankcase closed circuits), the principle of which is to vent crankcase exhaust gases directly to the atmosphere, and crankcase closed circuits, which are to introduce crankcase exhaust gases into the intake pipe of an engine and then burn them in the cylinders. However, for regulation, the crankcase is open-circulated by introducing the crankcase exhaust gas downstream of the aftertreatment or emission control device, but upstream of the sampling probe, and thorough mixing with the engine exhaust gas is accomplished prior to sampling. PN in the tail gas is filtered by the DPF, PN emission is low, and PN in the small-strand crankcase gas leakage is high.
Emission regulations are increasingly strict on the control of exhaust pipe emissions, next-generation emission regulations or the measurement range of PN (total particles with particle diameters exceeding 23nm in exhaust gas) is expanded from 23nm to 10nm, PN above 10nm in crankcase blow-by gas is difficult to filter by the existing oil-gas separator, and the problem of exceeding PN emission of the oil-gas separator is easily caused. In order to solve the technical problems, the utility model provides an open circulation breathing device, which is mainly used for an open ventilation system, and a passive oil-gas separator is added on the basis of the existing active oil-gas separator, so that particles with smaller particle sizes in crankcase blowby gas can be better filtered through PN filtering modes with two different mechanisms, PN with particle sizes exceeding 10nm can be effectively controlled, and the emission regulation requirements are met.
As shown in fig. 1, an embodiment of the utility model provides an open-cycle breathing device, which comprises an active oil-gas separator 1 and a passive oil-gas separator 2, wherein an air outlet pipe of the active oil-gas separator 1 is communicated with an air inlet pipe of the passive oil-gas separator 2. As shown in fig. 2, the passive oil-gas separator 2 includes a housing 23 and a filter element 25, a step is disposed on an inner wall of the housing 23, the filter element 25 includes a support frame 252 and a filter medium layer 253, the support frame 252 includes a support plate 2521 and a support cylinder 2522, an outer diameter of the support plate 2521 is larger than an outer diameter of the support cylinder 2522, the support plate 2521 is mounted on the step on the inner wall of the housing 23, an outer wall of the support plate 2521 is in sealing fit with the inner wall of the housing 23, and the filter medium layer 253 is wound on the support cylinder 2522.
According to the breathing device, oil drops and larger particles of crankcase ventilation gas are removed through the active separator, small particles are filtered through the passive oil-gas separator 2, and through the combination of the oil-gas separators with two different particle removal mechanisms, not only can oil drops be separated, but also more importantly, particles with the particle size of more than 10nm can be effectively removed, PN emission of a crankcase can be effectively reduced, the filtering performance of PN emission of the crankcase is obviously improved, and a technical scheme reserve is provided for the PN emission to meet the requirement of emission regulation upgrading.
As shown in fig. 2 and 4, the outer side surface of the support plate 2521 is provided with a groove, the groove is an annular groove, an opening of the annular groove faces away from the axis of the support plate 2521, a sealing ring 24 is arranged in the groove, and the sealing ring 24 is extruded in a sealing cavity formed by the groove and the inner wall of the housing 23. In the utility model, through the cooperation of the upper end support plate 2521 (and the groove), the shell 23 (and the step) and the sealing ring 24, the filter element 25 can be clamped on the inner wall of the shell 23 of the passive oil-gas separator 2 and can play a role in sealing.
As shown in fig. 3, the support frame 252 further includes a bottom plate 2523, the support plate 2521 is located at an upper end of the support cylinder 2522, the bottom plate 2523 is located at a lower end of the support cylinder 2522, and the bottom plate 2523 seals an opening at a bottom of the support cylinder 2522. The wall of the support cylinder 2522 is provided with ventilation holes, that is, the wall of the support cylinder is hollow, the ventilation holes are arranged along the radial direction so that gas can flow to the filter medium layer 253 through the support cylinder 2522, the outer diameter of the bottom plate 2523 is larger than that of the support cylinder 2522, and the filter medium layer 253 is positioned between the support plate 2521 and the bottom plate 2523. By sealing the support plate 2521 against the inner wall of the housing 23 and plugging the support cylinder 2522 with the bottom plate 2523, it is ensured that all the intake air is filtered through the filter medium.
The support frame 252 is used for maintaining and supporting the shape and stability of the filter medium, and can be made of stainless steel or polyethylene, and the filter medium layer 253 of the filter element 25 is formed by winding a multi-layer porous filter medium, and can be made of dense stainless steel wire mesh, filter melt-blown material, filter fiber and other filter materials. The pore size of the filter medium layer is in the range of 1-30 microns and the average pore size is in the range of 5-15 microns. When oil gas passes through the filter material, particles with different sizes can be filtered through mechanisms such as interception, inertial impact, diffusion (nanoscale particles mainly pass through diffusion), so that small particles with the size of more than 10nm can be effectively filtered, clean gas flows out through the filter medium layer 253, and finally the filtered gas is discharged into the atmosphere through an air outlet pipe of the passive oil-gas separator 2.
Further, as shown in fig. 3, the filter element 25 further includes a gripping member 251, the gripping member 251 is disposed on the support plate 2521, the gripping member 251 includes a grip portion 2511 and a connection portion 2512, the connection portion 2512 is mounted on the support plate 2521, and the grip portion 2511 is disposed on the connection portion 2512. In this embodiment, the grip portion 2511 is a handle, the handle is annular, the connecting portion 2512 is at least two connecting rods, and the handle is connected to the support plate 2521 through the connecting rods. When the filter cartridge 25 is attached and detached, the filter cartridge 25 is removed from the housing 23 by the ring handle or the filter cartridge 25 is mounted in the housing. It is understood that the grip portion 2511 may have other shapes, such as a rectangular shape, a trapezoid shape, or the like, and the connecting portion 2512 may have a cylindrical shape, or the like.
The shell 23 comprises an upper cover 231 and a lower shell 232, the upper cover 231 and the lower shell 232 are detachably connected, the step is arranged on the inner wall of the lower shell 232, and the supporting plate 2521 and the inner wall of the lower shell 232 are sealed through a sealing ring 24. The filter element 25 of the passive oil-gas separator 2 is of a detachable structure, can be replaced when the vehicle is maintained, is simple in replacement operation, and can be assembled by only unscrewing the upper cover 231 of the shell 23, then holding the handle at the upper end of the filter element 25 to pull out the filter element 25 and then assembling a new filter element 25.
As shown in fig. 1, the active oil-gas separator 1 is provided with an oil-gas inlet 11 at the top, an oil return opening 13 at the bottom, and a first exhaust port 12 on the side wall. The passive oil-gas separator 2 is provided with an air inlet 21, the side part of the passive oil-gas separator is provided with a second air outlet 22, the first air outlet 12 of the active oil-gas separator 1 is communicated with the air inlet 21 of the passive oil-gas separator 2 through a connecting pipe 3, and gas enters from the upper air inlet 21 and then is filtered through a filter element 25. The filter element 25 structure of the porous filter medium adopted by the passive oil-gas separator 2 has a good filtering effect on small particles, and oil drops can be separated through the combination of the oil-gas separators with two different particle removal mechanisms, and more importantly, particles with the particle size of more than 10nm are effectively removed.
The active oil separator 1 in the present embodiment may employ the prior art. The centrifugal separation structure is arranged in the active oil-gas separator 1, and as shown in fig. 5, the centrifugal separation structure comprises a centrifugal lamination 14, a rotating shaft 15 and a driving wheel 16, the centrifugal lamination 14 is arranged on the rotating shaft 15, the driving wheel 16 is connected with the rotating shaft 15, a pressure oil inlet 17 is arranged on the side wall of the active oil-gas separator 1, and the pressure oil inlet 17 faces the driving wheel 16.
The crankcase ventilation exhaust enters the active oil-gas separator 1 through the oil-gas inlet 11, the separator is of a rotary centrifugal separation structure, as shown in fig. 5, and mainly comprises a driving wheel 16, a rotating shaft 15, a centrifugal disc, a pressure oil inlet 17 and an oil return port 13, the upper end of the rotating shaft 15 is arranged on the active oil-gas separator 1 through an upper bearing die pressing, and the lower end of the rotating shaft 15 is also fixed through a bearing. The driving wheel 16 is driven by the engine oil of the pressure oil inlet 17, the engine oil is generally taken from an oil duct of an engine body, the pressure oil impacts the driving wheel 16 to rotate, the centrifugal disc is driven to rotate at a high speed through the rotating shaft 15, the oil-gas mixture is separated through centrifugal force, oil drops and larger particles are thrown to the inner wall of the separator shell 23, flow to the bottom of the separator through the upper part of the driving wheel 16, then flow back to the oil pan of the engine body through the oil return port 13, and separated gas flows out of the active oil-gas separator 1 through a gas channel.
The oil and larger particles (usually more than 100 nm) in the oil and gas are separated under the centrifugal force action of the rotating disc in the active oil and gas separator 1, and the gas with most oil drops and large particles separated out enters the passive oil and gas separator 2 through the connecting pipe 3. The active separator can well remove oil drops and larger particles of crankcase ventilation gas through the centrifugal principle of a centrifugal disc, but has almost no filtering effect on small particles in the gas. The filter element 25 structure of the porous filter medium of the active oil-gas separator 1 and the passive oil-gas separator 2 are combined, so that the realization mode is simple, the effect of effectively reducing particles above 10nm is achieved, and the filtering performance of PN emission of a crankcase is obviously improved. The technical principle of the scheme is simple, but the PN filtering efficiency of the crankcase can be effectively improved, and the scheme is easy to popularize and apply.
Based on the open-cycle breathing apparatus, the embodiment of the utility model further provides an engine, and the engine is provided with the open-cycle breathing apparatus according to the embodiment, and the technical effects of the engine adopting the open-cycle breathing apparatus refer to the embodiment because the open-cycle breathing apparatus has the technical effects described above.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420205416.6U CN222184888U (en) | 2024-01-26 | 2024-01-26 | Open circulation breathing device and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420205416.6U CN222184888U (en) | 2024-01-26 | 2024-01-26 | Open circulation breathing device and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222184888U true CN222184888U (en) | 2024-12-17 |
Family
ID=93837038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420205416.6U Active CN222184888U (en) | 2024-01-26 | 2024-01-26 | Open circulation breathing device and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222184888U (en) |
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- 2024-01-26 CN CN202420205416.6U patent/CN222184888U/en active Active
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