CN117803466A - Forced cooling type crankcase ventilation device - Google Patents
Forced cooling type crankcase ventilation device Download PDFInfo
- Publication number
- CN117803466A CN117803466A CN202311836496.1A CN202311836496A CN117803466A CN 117803466 A CN117803466 A CN 117803466A CN 202311836496 A CN202311836496 A CN 202311836496A CN 117803466 A CN117803466 A CN 117803466A
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- China
- Prior art keywords
- oil
- water
- cooling
- ventilation device
- crankcase ventilation
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Links
- 238000001816 cooling Methods 0.000 title claims abstract description 61
- 238000009423 ventilation Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000000110 cooling liquid Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 80
- 235000019198 oils Nutrition 0.000 description 72
- 239000007789 gas Substances 0.000 description 54
- 239000012528 membrane Substances 0.000 description 12
- 239000010705 motor oil Substances 0.000 description 12
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 235000019476 oil-water mixture Nutrition 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a forced cooling type crankcase ventilation device, which comprises: an air inlet pipe, an oil-gas separator and a water-cooling exhaust pipe. One end of the air inlet pipe is connected with the crankcase; an air inlet of the oil-gas separator is connected with the other end of the air inlet pipe; one end of the water-cooling exhaust pipe is connected with an air outlet of the oil-gas separator, a water cavity is arranged in the water-cooling exhaust pipe, and the water cavity is used for cooling liquid to pass through. Therefore, the forced cooling type crankcase ventilation device is simple and reasonable in structure, adopts a water-cooling exhaust pipe structure, improves the oil gas filtering efficiency, and achieves smaller flow resistance and higher filtering effect.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a forced cooling type crankcase ventilation device.
Background
In order to ensure that the friction kinematic pair can be effectively lubricated, a certain gap exists between the piston and the cylinder sleeve which reciprocate at a high speed, so that high-pressure high-temperature gas in the cylinder can continuously leak into the crankcase through the gap in the running process of the engine, and the pressure in the crankcase is continuously increased. The blowby gas mainly contains unburned fuel gas, water vapor, exhaust gas and the like, and the components thereof cause deterioration of engine oil, thereby accelerating wear of engine moving parts. Therefore, in order to prevent the crankcase pressure from being too high, prolong the service life of engine oil, reduce the abrasion and corrosion of parts, and simultaneously prevent the oil leakage of the engine, the engine must use a crankcase ventilation device.
The large cylinder diameter diesel engine for ship generally adopts an open type breather device, namely, the gas filtered by the breather is directly discharged into the atmosphere. Taking the most commonly used labyrinth type respirator as an example, due to the limited filtering efficiency, part of the combustible mixture and engine oil vapor can cause environmental pollution, and the engine oil consumption can also be increased. In order to improve the above situation, some products are added with porous elements such as metal mesh and the like in the respirator, so as to increase the contact area of oil gas, thereby improving the filtering efficiency, but at the same time, greatly increasing the flow resistance, thereby causing the pressure of the crankcase to be increased.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a forced cooling type crankcase ventilation device which is simple and reasonable in structure, adopts a water-cooling exhaust pipe structure, improves oil-gas filtering efficiency, and achieves smaller flow resistance and higher filtering effect.
In order to achieve the above object, the present invention provides a forced cooling type crankcase ventilation device comprising: an air inlet pipe, an oil-gas separator and a water-cooling exhaust pipe. One end of the air inlet pipe is connected with the crankcase; an air inlet of the oil-gas separator is connected with the other end of the air inlet pipe; one end of the water-cooling exhaust pipe is connected with an air outlet of the oil-gas separator, a water cavity is arranged in the water-cooling exhaust pipe, and the water cavity is used for cooling liquid to pass through.
In one embodiment of the present invention, the forced cooling crankcase ventilation device further comprises: an oil drain pipe and an oil-water separator. One end of the oil drain pipe is connected with an oil outlet of the oil-gas separator; and an oil inlet of the oil-water separator is connected with the other end of the oil drain pipe.
In one embodiment of the present invention, the forced cooling crankcase ventilation device further comprises: an oil return pipe and an oil return joint. One end of the oil return pipe is connected with an oil outlet of the oil-water separator; and one end of the return joint is connected with the other end of the return pipe, and the other end of the return joint is connected with the oil pan.
In one embodiment of the invention, the water-cooled exhaust pipe is provided with a cooling liquid inlet and a cooling liquid outlet, one ends of the cooling liquid inlet and the cooling liquid outlet are respectively communicated with the water cavity, and the other ends of the cooling liquid inlet and the cooling liquid outlet are respectively connected with a cooling liquid mechanism of the engine through pipelines.
In an embodiment of the present invention, the oil separator includes: the device comprises a shell, a diaphragm and at least one limiting step. The air inlet is formed in the bottom of the shell, the air outlet is formed in the top of the shell, and the oil outlet is formed in one side of the shell; the diaphragm is arranged in the shell and is positioned between the air inlet and the air outlet; and the at least one limiting step is arranged in the shell and is used for limiting the diaphragm.
In an embodiment of the present invention, the oil separator further includes: and the oil collecting cavity and the plurality of sealing grooves. The oil collecting cavity is arranged in the shell and above the limiting step, and is communicated with the air outlet; and the plurality of sealing grooves are respectively arranged outside the shell.
In an embodiment of the present invention, the forced cooling type crankcase ventilation device further includes an oil passing bolt, and the oil drain pipe is connected to the oil outlet hole of the oil-gas separator through the oil passing bolt.
In an embodiment of the present invention, the membrane is umbrella-shaped, and a central hole is formed at a central position of the membrane.
In an embodiment of the present invention, the forced cooling type crankcase ventilation device further includes a plurality of fixing bolts, and the one end of the air intake pipe is connected to the crankcase by the plurality of fixing bolts.
Compared with the prior art, the forced cooling type crankcase ventilation device has the following structure
The beneficial effects are that:
1. the water-cooling exhaust pipe structure is adopted to improve the oil-gas filtering efficiency, and simultaneously, an umbrella-shaped oil-gas separator and an oil-water filtering device are integrated;
2. the umbrella-shaped diaphragm is arranged in the oil-gas separator, so that the crankcase ventilation device can play a role in balancing pressure, the contact area can be increased, the minimum flow resistance is realized, and the oil-gas filtering efficiency is improved;
3. a water cavity is arranged in the middle of the water-cooling exhaust pipe, and the cooling water of the engine is utilized to accelerate the condensation of high-temperature oil gas, so that the filtering efficiency is further improved;
4. the length of the traditional exhaust pipeline can be obviously reduced after the water-cooling exhaust pipe is arranged on the oil-gas separator, and the structure is more compact and reasonable;
5. the oil-water separator is connected to the outlet of the oil-gas separator and used for separating the oil-water mixture collected after condensation, so that the oil is prevented from being diluted due to the fact that moisture enters the oil pan.
Drawings
FIG. 1 is a schematic perspective view of a forced cooling crankcase ventilation device according to one embodiment of the invention;
FIG. 2 is a schematic diagram of a main cross-sectional structure of a forced cooling crankcase ventilation device according to one embodiment of the invention;
fig. 3 is a schematic sectional view of an oil-gas separator of a forced cooling type crankcase ventilation device according to an embodiment of the invention.
The main reference numerals illustrate:
the device comprises a 1-air inlet pipe, a 2-oil-gas separator, a 3-water-cooling exhaust pipe, a 4-water cavity, a 5-oil drain pipe, a 6-oil-water separator, a 7-oil return pipe, an 8-oil return joint, a 9-cooling liquid inlet, a 10-cooling liquid outlet, a 11-shell, a 12-air inlet, a 13-air outlet, a 14-oil outlet, a 15-diaphragm, a 16-limit step, a 17-oil collecting cavity, a 18-sealing groove, a 19-oil passing bolt, a 20-central hole, a 21-bolt, a 22-fixing bolt, a 23-hoop, a 24-water outlet, a 25-alarm, a 26-oil inlet and a 27-oil outlet.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
FIG. 1 is a schematic perspective view of a forced cooling crankcase ventilation device according to one embodiment of the invention; FIG. 2 is a schematic diagram of a main cross-sectional structure of a forced cooling crankcase ventilation device according to one embodiment of the invention; fig. 3 is a schematic sectional view of an oil-gas separator of a forced cooling type crankcase ventilation device according to an embodiment of the invention.
As shown in fig. 1 to 3, a forced cooling type crankcase ventilation device according to a preferred embodiment of the invention includes: an air inlet pipe 1, an oil-gas separator 2 and a water-cooling exhaust pipe 3. One end of the air inlet pipe 1 is connected with the crankcase; the air inlet 12 of the oil-gas separator 2 is connected with the other end of the air inlet pipe 1; one end of the water-cooling exhaust pipe 3 is connected with the air outlet 13 of the oil-gas separator 2 (fixed by a plurality of bolts 21), a water cavity 4 is arranged in the water-cooling exhaust pipe 3, and the water cavity 4 is used for cooling liquid to pass through.
In one embodiment of the present invention, the forced cooling crankcase ventilation device further comprises: an oil drain pipe 5 and an oil-water separator 6. One end of the oil drain pipe 5 is connected with an oil outlet 14 of the oil-gas separator 2; and an oil inlet 26 of the oil-water separator 6 is connected with the other end of the oil drain pipe 5 (fixed by a hoop 23).
In one embodiment of the present invention, the forced cooling crankcase ventilation device further comprises: an oil return pipe 7 and an oil return joint 8. One end of the oil return pipe 7 is connected with an oil outlet 27 of the oil-water separator 6 (fixed by a hoop 23); and one end of the return joint is connected with the other end of the return pipe, and the other end of the return joint 8 is connected with the oil pan.
In an embodiment of the present invention, the water-cooled exhaust pipe 3 is provided with a cooling liquid inlet 9 and a cooling liquid outlet 10, one ends of the cooling liquid inlet 9 and the cooling liquid outlet 10 are respectively communicated with the water cavity 4, and the other ends of the cooling liquid inlet 9 and the cooling liquid outlet 10 are respectively connected with a cooling liquid mechanism of the engine through pipelines.
In one embodiment of the present invention, the oil separator 2 includes: a housing 11, a membrane 15 and at least one limiting step 16. The air inlet 12 is formed in the bottom of the shell 11, the air outlet 13 is formed in the top of the shell 11, and the oil outlet 14 is formed in one side of the shell 11; the diaphragm 15 is disposed in the housing 11 and located between the air inlet 12 and the air outlet 13; and the at least one limiting step 16 is disposed in the housing 11, and the limiting step 16 is used for limiting the diaphragm 15.
In an embodiment of the present invention, the oil separator 2 further includes: oil collecting chamber 17 and a plurality of seal grooves 18. The oil collecting cavity 17 is arranged in the shell 11 and is positioned above the limiting step 16, and the oil collecting cavity 17 is communicated with the air outlet 13; and the plurality of seal grooves 18 are respectively opened outside the housing 11.
In an embodiment of the present invention, the forced cooling type crankcase ventilation device further includes an oil passing bolt 19, and the oil drain pipe 5 is connected to the oil outlet hole 14 of the oil separator 2 through the oil passing bolt 19.
In one embodiment of the present invention, the membrane 15 is umbrella-shaped, and a central hole 20 is formed at a central position of the membrane 15.
In an embodiment of the present invention, the forced cooling type crankcase ventilation device further includes a plurality of fixing bolts 22, and the one end of the intake pipe 1 is connected to the crankcase through the plurality of fixing bolts 22.
In practical application, the forced cooling type crankcase ventilation device mainly comprises an air inlet pipe 1, an oil-gas separator 2, a water-cooling exhaust pipe 3, an oil drain pipe 5, an oil-water separator 6 and an oil return pipe 7, as shown in fig. 1 and 2. The intake pipe 1 is generally installed at a higher position of the engine, such as a cylinder block top surface or a tappet chamber, etc., so as to facilitate the discharge of high-temperature oil gas (namely, a crankcase top surface, a tappet chamber cover plate or a crankcase side cover plate, etc., as long as the intake pipe is communicated with the crankcase cavity). When the system works, high-temperature oil gas of the engine enters from the air inlet pipe 1, sequentially passes through the umbrella-shaped membrane 15 and the oil-gas separator 2, and is discharged into the atmosphere through the water-cooling exhaust pipe 3; in the process, high-temperature oil gas contacts with the umbrella-shaped diaphragm 15 and each pipe wall, and engine oil in the oil gas adheres to the pipe wall; the engine oil on the pipe wall of the air inlet pipe 1 can directly flow back to the crankcase, the engine oil on the pipe wall of the water-cooled exhaust pipe 3 flows to the oil collecting cavity 17, enters the oil-water separator 6 through the oil outlet hole 14, the oil passing bolt 19 and the oil discharging pipe 5, and the separated clean engine oil flows back to the oil pan of the engine through the oil return pipe 7 and the oil return joint 8. Wherein, alarm 25 and outlet 24 are arranged at the bottom of oil-water separator 6.
The umbrella-shaped membrane 15 is arranged in the oil-gas separator 2, the umbrella-shaped membrane 15 is designed to be of a light and thin structure, the whole umbrella-shaped membrane 15 is of an umbrella shape, and a central hole 20 is further formed in the central position of the umbrella-shaped membrane 15, as shown in fig. 3; when the pressure of the crankcase is lower, the oil gas is directly discharged from the central hole 20, the oil gas is adhered to the arc surface of the umbrella-shaped diaphragm 15, and then the oil gas directly flows back to the crankcase after condensation; when the pressure of the crankcase is higher, oil gas with certain pressure blows up the umbrella-shaped diaphragm 15, and as the umbrella-shaped diaphragm 15 is of a movable structure, a plurality of limit steps 16 are also designed in the oil-gas separator 2, the umbrella-shaped diaphragm 15 can suspend at any position between the bottom of the oil-gas separator 2 and the limit steps 16, and the effect of balancing the pressure is achieved; at this time, the oil gas can go upward from the gap between the umbrella-shaped membrane 15 and the inner wall of the oil-gas separator 2, and enter the water-cooling exhaust pipe 3 through the air outlet 13, and in the process, the oil gas can also adhere to the flowing-through area, and the oil gas directly flows back to the crankcase after condensation. The umbrella-shaped membrane 15 can play a role in balancing pressure in the structure, meanwhile, the contact area can be increased, and the oil gas filtering efficiency is improved while the minimum flow resistance is realized.
The middle of the water-cooling exhaust pipe 3 is provided with a water cavity 4, a cooling water outlet and a cooling water inlet, and low-temperature cooling water of the engine can enter the water cavity 4 from the cooling water inlet and flow out through the cooling water outlet. For the traditional crankcase ventilation device, oil gas is directly discharged through a common exhaust pipe, and because the length of the exhaust pipe is limited (influenced by the arrangement of an engine and a cabin), the condensed oil gas can be directly discharged into the cabin or the atmosphere, so that the environment pollution is caused, and meanwhile, the engine oil consumption is increased. The invention creatively applies the water-cooling exhaust pipe 3 to the crankcase ventilation device to accelerate the condensation of high-temperature oil gas and further improve the filtering efficiency.
The outlet of the oil-gas separator 2 is connected with an oil-water separator 6 for separating the condensed oil-water mixture, so as to avoid dilution of the engine oil and accelerated deterioration of the engine oil due to water entering the oil pan.
In summary, the forced cooling crankcase ventilation device of the invention has the following beneficial effects:
1. the oil-gas filtering efficiency is improved by adopting the water-cooling exhaust pipe 3 structure, and meanwhile, the umbrella-shaped oil-gas separator 2 and the oil-water filtering device are integrated;
2. the umbrella-shaped diaphragm 15 is arranged in the oil-gas separator 2, so that the crankcase ventilation device can play a role in balancing pressure, the contact area can be increased, the minimum flow resistance is realized, and the oil-gas filtering efficiency is improved;
3. a water cavity 4 is arranged in the middle of the water-cooling exhaust pipe 3, and the cooling water of the engine is utilized to accelerate the condensation of high-temperature oil gas, so that the filtering efficiency is further improved;
4. the length of a traditional exhaust pipeline can be obviously reduced after the water-cooling exhaust pipe 3 is arranged on the oil-gas separator 2, and the structure is more compact and reasonable;
5. the outlet of the oil-gas separator 2 is connected with an oil-water separator 6 for separating the oil-water mixture collected after condensation, so as to avoid the dilution of the engine oil caused by the water entering the oil pan.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (9)
1. A forced cooling crankcase ventilation device, comprising:
one end of the air inlet pipe is connected with the crankcase;
the air inlet of the oil-gas separator is connected with the other end of the air inlet pipe; and
the water-cooling exhaust pipe is characterized in that one end of the water-cooling exhaust pipe is connected with an air outlet of the oil-gas separator, a water cavity is formed in the water-cooling exhaust pipe, and the water cavity is used for cooling liquid to pass through.
2. The forced cooling crankcase ventilation device of claim 1, further comprising:
one end of the oil drain pipe is connected with an oil outlet hole of the oil-gas separator; and
and an oil inlet of the oil-water separator is connected with the other end of the oil drain pipe.
3. The forced cooling crankcase ventilation device of claim 2, further comprising:
one end of the oil return pipe is connected with an oil outlet of the oil-water separator; and
the oil return joint, the one end that returns the head connect with the other end of return pipe is connected, just the other end that returns the oil joint is connected with the oil pan.
4. The forced cooling type crankcase ventilation device according to claim 1, wherein a cooling liquid inlet and a cooling liquid outlet are formed in the water cooling exhaust pipe, one ends of the cooling liquid inlet and the cooling liquid outlet are respectively communicated with the water cavity, and the other ends of the cooling liquid inlet and the cooling liquid outlet are respectively connected with a cooling liquid mechanism of an engine through pipelines.
5. The forced cooling crankcase ventilation device of claim 2, wherein the oil separator includes:
the air inlet is formed in the bottom of the shell, the air outlet is formed in the top of the shell, and the oil outlet is formed in one side of the shell;
the diaphragm is arranged in the shell and is positioned between the air inlet and the air outlet; and
at least one limiting step is arranged in the shell and is used for limiting the diaphragm.
6. The forced cooling crankcase ventilation device of claim 5, wherein the oil separator further comprises:
the oil collecting cavity is arranged in the shell and above the limiting step, and is communicated with the air outlet; and
and the sealing grooves are respectively arranged outside the shell.
7. The forced cooling crankcase ventilation device of claim 2, further comprising an oil drain bolt, wherein the oil drain pipe is connected to the oil outlet of the oil separator by the oil drain bolt.
8. The forced cooling crankcase ventilation device of claim 5, wherein the diaphragm is umbrella-shaped and a central hole is formed in a central position of the diaphragm.
9. The forced cooling crankcase ventilation device of claim 1 further including a plurality of anchor bolts, said one end of said air inlet duct being connected to said crankcase by a plurality of anchor bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311836496.1A CN117803466A (en) | 2023-12-28 | 2023-12-28 | Forced cooling type crankcase ventilation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311836496.1A CN117803466A (en) | 2023-12-28 | 2023-12-28 | Forced cooling type crankcase ventilation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117803466A true CN117803466A (en) | 2024-04-02 |
Family
ID=90429138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311836496.1A Pending CN117803466A (en) | 2023-12-28 | 2023-12-28 | Forced cooling type crankcase ventilation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117803466A (en) |
-
2023
- 2023-12-28 CN CN202311836496.1A patent/CN117803466A/en active Pending
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