CN201705426U - Oil-gas prefilter of engine crankcase - Google Patents
Oil-gas prefilter of engine crankcase Download PDFInfo
- Publication number
- CN201705426U CN201705426U CN2010202174683U CN201020217468U CN201705426U CN 201705426 U CN201705426 U CN 201705426U CN 2010202174683 U CN2010202174683 U CN 2010202174683U CN 201020217468 U CN201020217468 U CN 201020217468U CN 201705426 U CN201705426 U CN 201705426U
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- oil
- prefilter
- labyrinth
- gas
- assembly
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Abstract
The utility model discloses an oil-gas prefilter of an engine crankcase, which is installed above an oil collection cavity of a cylinder cover hood and comprises a cover of the prefilter, a bottom plate of the prefilter and a labyrinth component, wherein the labyrinth component is installed in a space formed by encircling the cover of the prefilter and the bottom plate of the prefilter; the labyrinth component is in a cavity body structure in the shape of a round platform, an annular necking passage is arranged in the cavity body, and the back side of the annular necking passage is provided with a labyrinth convolution cavity; an oil-gas inlet of the prefilter is arranged on the bottom plate of the prefilter and is communicated with an upper gas opening of the cylinder cover hood, and an oil-gas outlet is arranged on the cover of the prefilter; and an oil passing hole is arranged on the bottom plate of the prefilter. The oil-gas prefilter has more compact pre-filtering structure, more smooth oil return and better oil-gas pre-separation effect.
Description
Technical field
The utility model relates to a kind of gas and oil separating plant, particularly a kind of oil gas prefilter of engine crankcase.
Background technique
The waste gas that explosive motor burns in the course of the work can be by the piston ring gap crankcase that bleeds, but also has a large amount of fuel vapor in the waste gas.But generally can directly be disposed to atmosphere after simple separation, first causes waste, second befouling environment.
Country's automobile emissions standards regulation is after state's three standards are carried out, engine crankcase waste gas can not directly be discharged into atmosphere, must use the positive crankcase ventilation (PCV) scheme: waste gas is introduced after treatment behind the air-strainer and is mixed with fresh air before the pressurized machine, enters the firing chamber participation then and burns.Bypass oil gas use the deaerator of band filter core can obtain good oil gas separation, but filter core too much can produce obstruction because of oil gas after using a period of time, if this moment, can pollute supercharger air compressor deterioration engine combustion.Before deaerator, increase the pre-filter device of oil gas like this and just become the key that prolongs its life-span, can lower more renew cartridge cost of user simultaneously.
The pre-filter device of the oil gas of available engine to be adopted simple labyrinth structure or directly stops up steel wire lump, and the pre-filtering efficient of oil gas is low, and the machine oil after the separation reclaims the problem of difficulty, and the deaerator inner filter core is changed frequent, the customer using cost height.Tradition mazy type technological scheme shortcoming is to adopt tortuous currency structure, if tortuous excessive, then the gas stream dynamic resistance is big, and crankcase pressure increases; If tortuous very few, then the area of oil gas absorption is too small, and separation effect is low.There is not air-flow to quicken separation structure, to large and small oil gas particle separation poor effect.Save bit by bit machine oil reflow treatment difficulty in the labyrinth.
The model utility content
The utility model is in order to overcome defective in the above-mentioned prior art, and the pre-flock structure is more compact, and oil return is more smooth and easy, and oil gas pre-separation effect is better.
Engine crankcase oil gas prefilter of the present utility model is installed on the top of valve mechanism cover collection chamber, comprises prefilter lid, prefilter base plate and labyrinth assembly, and the labyrinth assembly is installed in by prefilter lid and prefilter base plate and surrounds in the space that forms; The labyrinth assembly is the cavity body structure of frustoconic shape, has annular reducing passage in the cavity, and annular reducing passage rear side has the chamber of circling round, labyrinth; Offer the prefilter oil and gas import on the prefilter base plate, the prefilter oil and gas import communicates with gas port on the cylinder head cover, and prefilter covers establishes oil gas vent; Offer oil-through hole on the prefilter base plate; Oil gas from gas port on the cylinder head cover enters the labyrinth assembly through the prefilter oil and gas import, in the assembly of labyrinth oil gas by annular reducing passage in flow velocity increase sharply, and in being circled round in the chamber in the labyrinth, hit wall and circle round, make oil droplet stick on the wall of labyrinth, the oil droplet that adheres to flows into the valve mechanism cover collection chamber through oil-through hole, and residue oil gas enters the pre-filter device of next stage by the labyrinth outlet.
Wherein, the pre-filter device of next stage is series connection, that structure is identical secondary maze assembly with the labyrinth assembly, the movement locus of oil gas in the secondary maze assembly is with identical in the assembly of aforementioned labyrinth, through the secondary pre-flock, most of oil droplet in the oil gas is filtered in advance, and residual gas enters fine-filtering device through oil gas vent.
Wherein, establish the labyrinth baffle plate in the cavity of labyrinth assembly, form annular reducing passage between labyrinth baffle plate and the labyrinth madial wall, oil gas flows out the labyrinth outlet by the circle round vent in outlet port, chamber of labyrinth, and vent plane and labyrinth baffle plate integral body are horn-like.
Wherein, the valve mechanism cover collection chamber is funnel shape, and its bottom is communicated with the machine oil return tube, and machine oil return tube free end inserts below the machine oil liquid level of cylinder head oil collecting hole.
Wherein, the quantity of machine oil return tube is preferably two.
Wherein, establish O-ring seal on the attachment face of prefilter base plate and valve mechanism cover.
Compared with prior art, the utlity model has following beneficial effect:
1) the annular throat structure of labyrinth assembly can quicken air-flow velocity;
2) airflow cyclotron cavity of labyrinth module back can help the large particle oil droplet to stick on the wall of chamber, labyrinth;
3) a large amount of oil-through holes on the prefilter base plate, the oil droplet that makes things convenient for each position to adhere to drops onto collection cavity, avoids the oil return dead angle;
4) the funnel-like oil collecting structure on the valve mechanism cover makes and can fully reclaim from the oil droplet of prefilter bottom plate hole drippage;
5) the machine oil return tube and the oil collecting hole structure on the cylinder head that are provided with on the valve mechanism cover can effectively be avoided the oil gas short circuit;
6) the utility model oil return mechanism is reasonable in design, and oil return is smooth and easy, oil gas pre-separation efficient height.
Description of drawings
Fig. 1 is the sectional view after the utility model oil gas prefilter is installed;
Fig. 2 is the stereogram of the utility model oil gas prefilter;
Fig. 3 is the flow schematic diagram (direction of arrow be oil gas moving direction) of the utility model oil gas in the assembly of labyrinth;
Fig. 4 is the scheme of installation of the utility model oil gas prefilter and valve mechanism cover.
1-oil gas prefilter parts; The 2-valve mechanism cover; 3-valve mechanism cover collection chamber; 4-cylinder head oil collecting hole; 5-machine oil return tube; Gas port on the 6-cylinder head cover; 7-prefilter lid; 8-prefilter oil and gas import; 9-prefilter base plate; The 10-oil-through hole; The 11-O-ring seal; The 12-oil gas vent; The 13-fixing bolt; 15-secondary maze assembly; 16-labyrinth assembly; 17-labyrinth inlet; 18-labyrinth baffle plate; 19-annular reducing passage; The 20-vent; The 21-chamber of circling round in the labyrinth; The outlet of 22-labyrinth.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.
The work principle of filter of the utility model oil gas prefilter: when utilizing air-flow path by wide narrowing down, the principle that air-flow can quicken, promptly the section of narrowing down flow velocity can increase.As shown in Figure 3, the utility model labyrinth component internal gas channel is narrowed down by wide, and oil gas flowed and quickened this moment, the large particle oil droplet is because the big inertia of quality is also big, quicken the back moving direction that changed in stays, will hit wall along the direction of quickening and circle round, thereby stick on the prefilter inwall; The granule oil droplet also can reduce to a certain extent through the pre-flock of secondary maze assembly.
Describe the dependency structure and the oil gas path of travel of the utility model oil gas prefilter below in detail:
As shown in Figures 1 to 4, the utility model crankcase oil gas prefilter is installed in the top of valve mechanism cover collection chamber 3, comprise prefilter lid 7, prefilter base plate 9 and labyrinth assembly 16, secondary maze assembly 15, the labyrinth assembly is identical with the secondary maze modular construction, and both are installed in by prefilter lid 7 and prefilter base plate 9 with serial fashion and surround in the space that forms.
The labyrinth assembly is the cavity body structure of frustoconic shape, and above-mentioned prefilter lid 7 and prefilter base plate 9 surround the space that forms and be isolated into two inner chambers by labyrinth assembly 16, secondary maze assembly 15.Establish labyrinth baffle plate 18 in the cavity of labyrinth assembly 16 and secondary maze assembly 15, form annular reducing passage 19 between labyrinth baffle plate 18 and the labyrinth madial wall, annular reducing passage 19 rear sides have the chamber 21 of circling round, labyrinth.Oil gas flows out labyrinths outlet 22 by the circle round vent 20 in 21 outlet ports, chamber of labyrinth, and vent plane and labyrinth baffle plate 18 integral body are horn-like.Oil gas gas port 6 from the cylinder head cover upwards flows, enter the labyrinth inlet 17 of labyrinth assembly 16 through prefilter oil and gas import 8, be subjected to stopping of labyrinth baffle plate 18, air-flow can only be from flowing through at the annular reducing passage 19 that narrows, according to fluid mechanics principle, air-flow velocity can increase suddenly herein, and the large and small oil particles in the oil gas also can be followed and be quickened to flow forward in the gap, hit wall and circle round in being circled round in chamber 21 in the labyrinth, part large particle oil droplet will stick on the wall of labyrinth.The granule oil droplet is followed oil gas and is entered secondary maze assembly 15 further pre-flocks by vent 20 from labyrinth outlet 22 outflows.The motion of oil gas in secondary maze assembly 15 that enters secondary maze assembly 15 is identical with aforementioned track in the assembly of labyrinth, flow out from oil gas vent 12 at last, at this moment, most of large and small particle oil droplet in the oil gas is filtered in advance, and the deaerator that residual gas can be incorporated into the band filter core carries out further smart filter.
Be processed with a large amount of oil-through hole 10 on the prefilter base plate 9 of bottom, the machine oil that labyrinth assembly 16 and secondary maze assembly 15 pre-flocks come out drops onto valve mechanism cover collection chamber 3 through oil-through hole 10, valve mechanism cover collection chamber 3 is funnel-like, the machine oil of pre-flock can be collected.Machine oil return tube 5 quantity are two, the one end is communicated with valve mechanism cover collection chamber 3, the other end inserts below the machine oil liquid level of cylinder head oil collecting hole 4, and the machine oil of collecting has accumulated to cylinder head oil collecting hole 4 through machine oil return tube 5, has expired and will spill in the cylinder head.Machine oil return tube 5 and cylinder head oil collecting hole 4 have formed the trap structure of a similar toilet drainage pipe, can avoid the oil gas in the cylinder head oppositely directly to discharge (promptly do not enter the labyrinth assembly and carry out filter just) by machine oil return tube 5, that is to say, the machine oil that cylinder head oil collecting hole 4 gathers can prevent the oil gas short circuit in the cylinder head, guarantee that oil gas can not walk around the labyrinth assembly and directly flow out from oil gas vent 12, also can completely cut off that oil gas mixes again in oil gas in the valve mechanism cover collection chamber 3 and the cylinder head simultaneously.
As shown in Figure 4, prefilter lid 7, prefilter base plate 9 and valve mechanism cover 2 are fixed together,, on the attachment face of prefilter base plate 9 and valve mechanism cover 2, establish O-ring seal 11 for avoiding oil and gas leakage by fixing bolt 13.
The feasible oil gas from gas port on the cylinder head cover 6 of oil gas prefilter of the present utility model enters labyrinth assembly 16 through prefilter oil and gas import 8, in the assembly of labyrinth oil gas by annular reducing passage 19 in flow velocity increase sharply, and in being circled round in chamber 21 in the labyrinth, hit wall and circle round, make oil droplet stick on the wall of labyrinth, the oil droplet that adheres to flows into valve mechanism cover collection chamber 3 through oil-through hole 10, residue oil gas enters the secondary maze assembly by labyrinth outlet 22 and carries out the secondary pre-flock, compare with pre-filter device in the prior art, oil gas pre-separation effect of the present utility model is higher; The structural design of machine oil return tube 5 and cylinder head oil collecting hole 4 can effectively prevent the oil gas short circuit in the cylinder head.
More than disclosed only be a specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection domain of the present utility model.
Claims (6)
1. engine crankcase oil gas prefilter is installed on the top of valve mechanism cover collection chamber, it is characterized in that,
Comprise prefilter lid, prefilter base plate and labyrinth assembly, the labyrinth assembly is installed in by described prefilter lid and prefilter base plate and surrounds in the space that forms;
The labyrinth assembly is the cavity body structure of frustoconic shape, has annular reducing passage in the cavity, and annular reducing passage rear side has the chamber of circling round, labyrinth;
Offer the prefilter oil and gas import on the described prefilter base plate, the prefilter oil and gas import communicates with gas port on the cylinder head cover, and prefilter covers establishes oil gas vent;
Offer oil-through hole on the prefilter base plate;
Oil gas from gas port on the cylinder head cover enters the labyrinth assembly through the prefilter oil and gas import, in the assembly of labyrinth oil gas by annular reducing passage in flow velocity increase sharply, and in being circled round in the chamber in described labyrinth, hit wall and circle round, make oil droplet stick on the wall of labyrinth, the oil droplet that adheres to flows into described valve mechanism cover collection chamber through described oil-through hole, and residue oil gas enters the pre-filter device of next stage by the labyrinth outlet.
2. oil gas prefilter according to claim 1, it is characterized in that, the pre-filter device of described next stage is series connection, that structure is identical secondary maze assembly with described labyrinth assembly, the movement locus of oil gas in the secondary maze assembly is with identical in the assembly of aforementioned labyrinth, through the secondary pre-flock, most of oil droplet in the oil gas is filtered in advance, and residual gas enters fine-filtering device through oil gas vent.
3. oil gas prefilter according to claim 1 and 2, it is characterized in that, establish the labyrinth baffle plate in the cavity of described labyrinth assembly, form described annular reducing passage between labyrinth baffle plate and the labyrinth madial wall, oil gas flows out the outlet of described labyrinth by the circle round vent in outlet port, chamber of described labyrinth, and described vent plane and labyrinth baffle plate integral body are horn-like.
4. oil gas prefilter according to claim 1 and 2 is characterized in that, described valve mechanism cover collection chamber is funnel shape, and its bottom is communicated with the machine oil return tube, and machine oil return tube free end inserts below the machine oil liquid level of cylinder head oil collecting hole.
5. oil gas prefilter according to claim 4 is characterized in that, the quantity of described machine oil return tube is two.
6. oil gas prefilter according to claim 1 and 2 is characterized in that, establishes O-ring seal on the attachment face of described prefilter base plate and valve mechanism cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202174683U CN201705426U (en) | 2010-06-04 | 2010-06-04 | Oil-gas prefilter of engine crankcase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202174683U CN201705426U (en) | 2010-06-04 | 2010-06-04 | Oil-gas prefilter of engine crankcase |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201705426U true CN201705426U (en) | 2011-01-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202174683U Expired - Fee Related CN201705426U (en) | 2010-06-04 | 2010-06-04 | Oil-gas prefilter of engine crankcase |
Country Status (1)
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| CN (1) | CN201705426U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226419A (en) * | 2011-05-25 | 2011-10-26 | 中国兵器工业集团第七○研究所 | Efficient oil-gas separation device of engine |
| CN102269029A (en) * | 2010-06-04 | 2011-12-07 | 广西玉柴机器股份有限公司 | Oil gas prefilter of engine crank case |
| CN102635423A (en) * | 2012-05-06 | 2012-08-15 | 中国兵器工业集团第七0研究所 | Respirator |
| CN102705040A (en) * | 2012-06-18 | 2012-10-03 | 南充凌云高聚制造有限公司 | Independent external-mounting maintenance-free multi-stage oil and gas separator assembly |
| CN102758665A (en) * | 2011-04-27 | 2012-10-31 | 广西玉柴机器股份有限公司 | Oil-gas preseparation device |
| CN105221209A (en) * | 2014-11-21 | 2016-01-06 | 重庆隆鑫发动机有限公司 | centrifugal fine filter separating plate |
| CN108636041A (en) * | 2018-06-01 | 2018-10-12 | 北京理工伺服科技有限公司 | Compact solid propellant gas filter device |
-
2010
- 2010-06-04 CN CN2010202174683U patent/CN201705426U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269029A (en) * | 2010-06-04 | 2011-12-07 | 广西玉柴机器股份有限公司 | Oil gas prefilter of engine crank case |
| CN102758665A (en) * | 2011-04-27 | 2012-10-31 | 广西玉柴机器股份有限公司 | Oil-gas preseparation device |
| CN102226419A (en) * | 2011-05-25 | 2011-10-26 | 中国兵器工业集团第七○研究所 | Efficient oil-gas separation device of engine |
| CN102635423A (en) * | 2012-05-06 | 2012-08-15 | 中国兵器工业集团第七0研究所 | Respirator |
| CN102635423B (en) * | 2012-05-06 | 2016-06-29 | 中国兵器工业集团第七0研究所 | A kind of respiratory organ |
| CN102705040A (en) * | 2012-06-18 | 2012-10-03 | 南充凌云高聚制造有限公司 | Independent external-mounting maintenance-free multi-stage oil and gas separator assembly |
| CN102705040B (en) * | 2012-06-18 | 2014-08-13 | 南充凌云高聚制造有限公司 | Independent external-mounting maintenance-free multi-stage oil and gas separator assembly |
| CN105221209A (en) * | 2014-11-21 | 2016-01-06 | 重庆隆鑫发动机有限公司 | centrifugal fine filter separating plate |
| CN108636041A (en) * | 2018-06-01 | 2018-10-12 | 北京理工伺服科技有限公司 | Compact solid propellant gas filter device |
| CN108636041B (en) * | 2018-06-01 | 2020-11-13 | 北京理工伺服科技有限公司 | Compact solid propellant gas filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110112 Termination date: 20180604 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |