阅读说明：本技术 一种气缸盖罩的油气分离结构 (Oil-gas separation structure of cylinder head cover ) 是由 钟建斌 于 2021-10-14 设计创作，主要内容包括：本发明公开了一种气缸盖罩的油气分离结构,盖板本体焊接在气缸盖罩本体内并且封闭分离腔的下端开口；盖板本体的右端成型有上下开口的第一回油孔；盖板本体的左部成型有上下开口的第一进气孔、右端成型有上下开口的第二进气孔；第二进气孔位于第一回油孔的后侧；盖板本体的上端面上成型有分离罩；分离罩与盖板本体的上端面之间设置有分离通道并且此分离通道的开口设置在分离罩的右端；盖板本体的上端面右端成型有自下而上倾斜向后设置的倾斜盖板；分离腔的上侧壁左端设置有出气管接头；分离腔的侧壁上成型有若干左右均匀分布的挡条。(The invention discloses an oil-gas separation structure of a cylinder head cover.A cover plate body is welded in the cylinder head cover body and seals a lower end opening of a separation cavity; a first oil return hole with an upper opening and a lower opening is formed at the right end of the cover plate body; a first air inlet hole with an upper opening and a lower opening is formed at the left part of the cover plate body, and a second air inlet hole with an upper opening and a lower opening is formed at the right end of the cover plate body; the second air inlet hole is positioned at the rear side of the first oil return hole; a separation cover is formed on the upper end surface of the cover plate body; a separation channel is arranged between the separation cover and the upper end surface of the cover plate body, and an opening of the separation channel is arranged at the right end of the separation cover; an inclined cover plate which is obliquely and backwards arranged from bottom to top is formed at the right end of the upper end surface of the cover plate body; an air outlet pipe joint is arranged at the left end of the upper side wall of the separation cavity; a plurality of barrier strips which are uniformly distributed on the left and the right are formed on the side wall of the separation cavity.)

1. The utility model provides an oil-gas separation structure of cylinder head cover which characterized in that: comprises a cylinder head cover body (10) and an oil-gas separation cover plate (20); a separation cavity (100) which is concave upwards is formed on the cylinder head cover body (10); the oil-gas separation cover plate (20) comprises a cover plate body (21); the cover plate body (21) is welded in the cylinder head cover body (10) and closes the lower end opening of the separation cavity (100); a first oil return hole (202) which is opened up and down is formed at the right end of the cover plate body (21); a first air inlet hole (200) with an upper opening and a lower opening is formed at the left part of the cover plate body (21), and a second air inlet hole (201) with an upper opening and a lower opening is formed at the right end of the cover plate body; the second air inlet hole (201) is positioned at the rear side of the first oil return hole (202); a separation cover (22) is formed on the upper end surface of the cover plate body (21); a separation channel is arranged between the separation cover (22) and the upper end surface of the cover plate body (21), and an opening of the separation channel is arranged at the right end of the separation cover (22); an inclined cover plate (212) which is arranged from bottom to top and inclines backwards is formed at the right end of the upper end surface of the cover plate body (21); the lower end of the inclined cover plate (212) is positioned between the first oil return hole (202) and the second air inlet hole (201) and the inclined cover plate (212) is positioned right above the second air inlet hole (201); an air outlet pipe joint (11) is arranged at the left end of the upper side wall of the separation cavity (100); the air outlet pipe joint (11) is positioned on the left front side of the separation cover (22); a plurality of barrier strips (12) which are uniformly distributed from left to right are formed on the side wall of the separation cavity (100); a second oil return cavity (220) is formed between the left end of the separation cover (22) and the upper end surface of the cover plate body (21); a second oil return hole (203) with an upper opening and a lower opening is formed in the left part of the cover plate body (21); the second oil return hole (203) is communicated with the second oil return cavity (220); the second oil return cavity (220) is positioned on the left side of the first air inlet hole (200); the upper end of the inner side wall of the separation cover (22) is provided with a plurality of inner stop bars (221) which are evenly distributed left and right.

2. The oil-gas separation structure of a cylinder head cover according to claim 1, characterized in that: the upper right end of the side wall of the separation cover (22) is formed as an inclined plate inclined downward from left to right.

3. The oil-gas separation structure of a cylinder head cover according to claim 1, characterized in that: a first air inlet cover (211) is respectively formed on the lower end surface of the cover plate body (21); the first air inlet cover (211) is positioned right below the first air inlet hole (200) and covers the first air inlet hole (200); the intake end of the first intake cover (211) is located on the rear side thereof.

4. The oil-gas separation structure of a cylinder head cover according to claim 1, characterized in that: a right auxiliary cover (23) is formed at the right end of the lower end face of the cover plate body (21); a second air inlet cover (231) is formed at the rear end of the right auxiliary cover (23), and a first oil return cavity (230) is formed at the front end of the right auxiliary cover; the second air inlet cover (231) is positioned right below the second air inlet hole (201) and covers the second air inlet hole (201); the air inlet end of the second air inlet cover (231) is positioned at the rear side thereof; the first oil return cavity (230) is positioned right below the first oil return hole (202); an oil dropping hole is formed on the lower side wall of the first oil returning cavity (230).

5. The oil-gas separation structure of a cylinder head cover according to claim 4, characterized in that: the oil falling hole and the first oil return hole (202) are staggered left and right, and the oil falling hole is positioned on the right side of the first oil return hole (202).

6. The oil-gas separation structure of a cylinder head cover according to claim 1, characterized in that: a sealing ring is arranged between the cover plate body (21) and the lower end opening of the separation cavity (100).

Technical Field

The invention relates to the technical field of cylinder covers, in particular to an oil-gas separation structure of a cylinder cover hood.

Background

The oil-gas separator separates oil drops of engine oil carried in blow-by gas of a crankcase, separated waste gas is introduced into a combustion chamber through a ventilation pipeline of the crankcase to be combusted, and the separated oil drops flow back into the crankcase, so that the problems of overhigh consumption of the engine oil, abnormal combustion and the like are prevented.

The traditional gasoline separator is characterized in that an oil-gas pre-separation structure is generally arranged on a cylinder cover, pre-separated oil-gas mixture is further separated through a filter element outside an engine or a cyclone oil-gas separator, oil drops return to an oil pan through an external pipeline, and gas participates in air inlet circulation through the external pipeline.

Disclosure of Invention

The invention aims to provide an oil-gas separation structure of a cylinder head cover, aiming at the technical problem of complex existing gasoline separation structure.

The technical scheme for solving the technical problems is as follows: an oil-gas separation structure of a cylinder head cover comprises a cylinder head cover body and an oil-gas separation cover plate; an upward concave separation cavity is formed on the cylinder head cover body; the oil-gas separation cover plate comprises a cover plate body; the cover plate body is welded in the cylinder head cover body and closes the lower end opening of the separation cavity; a first oil return hole with an upper opening and a lower opening is formed at the right end of the cover plate body; a first air inlet hole with an upper opening and a lower opening is formed at the left part of the cover plate body, and a second air inlet hole with an upper opening and a lower opening is formed at the right end of the cover plate body; the second air inlet hole is positioned at the rear side of the first oil return hole; a separation cover is formed on the upper end surface of the cover plate body; a separation channel is arranged between the separation cover and the upper end surface of the cover plate body, and an opening of the separation channel is arranged at the right end of the separation cover; an inclined cover plate which is obliquely and backwards arranged from bottom to top is formed at the right end of the upper end surface of the cover plate body; the lower end of the inclined cover plate is positioned between the first oil return hole and the second air inlet hole, and the inclined cover plate is positioned right above the second air inlet hole; an air outlet pipe joint is arranged at the left end of the upper side wall of the separation cavity; the air outlet pipe joint is positioned on the left front side of the separation cover; a plurality of barrier strips which are uniformly distributed from left to right are formed on the side wall of the separation cavity; a second oil return cavity is formed between the left end of the separation cover and the upper end surface of the cover plate body; a second oil return hole with an upper opening and a lower opening is formed in the left part of the cover plate body; the second oil return hole is communicated with the second oil return cavity; the second oil return cavity is positioned on the left side of the first air inlet hole; a plurality of inner stop strips which are uniformly distributed from left to right are formed at the upper end of the inner side wall of the separation cover.

Preferably, the upper right end of the side wall of the separation hood is formed as an inclined plate inclined downward from left to right.

Preferably, the lower end surfaces of the cover plate bodies are respectively provided with a first air inlet cover; the first air inlet cover is positioned right below the first air inlet hole and covers the first air inlet hole; the air inlet end of the first inlet hood is located at the rear side thereof.

Preferably, a right auxiliary cover is formed at the right end of the lower end face of the cover plate body; a second air inlet cover is formed at the rear end of the right auxiliary cover, and a first oil return cavity is formed at the front end of the right auxiliary cover; the second air inlet cover is positioned right below the second air inlet hole and covers the second air inlet hole; the air inlet end of the second air inlet cover is positioned at the rear side of the second air inlet cover; the first oil return cavity is positioned right below the first oil return hole; an oil dropping hole is formed in the lower side wall of the first oil returning cavity.

Preferably, the oil dropping hole and the first oil return hole are staggered from left to right and the oil dropping hole is positioned on the right side of the first oil return hole.

Preferably, a sealing ring is arranged between the cover plate body and the lower end opening of the separation cavity.

The invention has the beneficial effects that: simple structure is provided with two inlet ports and the cooperation is provided with two component separation structures, is favorable to oil-gas separation.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic structural view of the cross section A-A of FIG. 1 according to the present invention;

FIG. 3 is a schematic structural view of the oil-gas separation cover plate 20 of the present invention;

FIG. 4 is a schematic top view of the present invention;

FIG. 5 is a schematic structural view of the cross section B-B in FIG. 4 according to the present invention;

FIG. 6 is a schematic structural view of a cross section C-C in FIG. 4 according to the present invention.

In the drawings, 10, a cylinder head cover body; 100. a separation chamber; 11. an air outlet pipe joint; 12. blocking strips; 20. an oil-gas separation cover plate; 200. a first air intake hole; 201. a second air intake hole; 202. a first oil return hole; 203. a second oil return hole; 21. a cover plate body; 211. a first inlet cowl; 212. tilting the cover plate; 22. a separation hood; 220. a second oil return cavity; 221. an inner stop strip; 23. a right auxiliary cover; 230. a first oil return cavity; 231. and a second inlet cowl.

Detailed Description

As shown in fig. 1 to 6, an oil-gas separation structure of a cylinder head cover comprises a cylinder head cover body 10 and an oil-gas separation cover plate 20; the cylinder head cover body 10 is formed with an upward concave separation cavity 100; the oil-gas separation cover plate 20 comprises a cover plate body 21; the cover plate body 21 is welded in the cylinder head cover body 10 and closes the lower end opening of the separation chamber 100; a first oil return hole 202 with an upper opening and a lower opening is formed at the right end of the cover plate body 21; a first air inlet hole 200 with an upper opening and a lower opening is formed at the left part of the cover plate body 21, and a second air inlet hole 201 with an upper opening and a lower opening is formed at the right end; the second intake port 201 is located on the rear side of the first oil return hole 202; a separation cover 22 is formed on the upper end surface of the cover plate body 21; a separation channel is arranged between the separation cover 22 and the upper end face of the cover plate body 21, and an opening of the separation channel is arranged at the right end of the separation cover 22; an inclined cover plate 212 which is arranged obliquely backwards from bottom to top is formed at the right end of the upper end surface of the cover plate body 21; the lower end of the inclined cover plate 212 is located between the first oil return hole 202 and the second intake hole 201 and the inclined cover plate 212 is located directly above the second intake hole 201; the left end of the upper side wall of the separation cavity 100 is provided with an air outlet pipe joint 11; the air outlet pipe joint 11 is positioned at the left front side of the separation cover 22; a plurality of barrier strips 12 which are uniformly distributed from left to right are formed on the side wall of the separation cavity 100; a second oil return cavity 220 is formed between the left end of the separation cover 22 and the upper end surface of the cover plate body 21; a second oil return hole 203 with an upper opening and a lower opening is formed at the left part of the cover plate body 21; the second oil return hole 203 is communicated with the second oil return cavity 220; the second oil return chamber 220 is located at the left side of the first air intake hole 200; the upper end of the inner side wall of the separation cover 22 is formed with a plurality of inner stop strips 221 which are evenly distributed left and right.

As shown in fig. 2 to 5, the upper right end of the side wall of the separation hood 22 is formed as an inclined plate inclined downward from left to right.

As shown in fig. 2 and 5, first air intake hoods 211 are respectively formed on the lower end surfaces of the cover plate body 21; the first intake cover 211 is positioned right below the first intake holes 200 and covers the first intake holes 200; the intake end of the first intake cover 211 is located on the rear side thereof.

As shown in fig. 2 to 6, a right auxiliary cover 23 is formed at the right end of the lower end surface of the cover plate body 21; a second air inlet cover 231 is formed at the rear end of the right auxiliary cover 23, and a first oil return cavity 230 is formed at the front end; the second intake port cover 231 is positioned right below the second intake port 201 and covers the second intake port 201; the intake end of the second intake cover 231 is located at the rear side thereof; the first oil return chamber 230 is located right below the first oil return hole 202; an oil dropping hole is formed on a lower side wall of the first oil returning chamber 230.

As shown in fig. 2 to 6, the oil dropping holes and the first oil return holes 202 are offset from each other in the right direction, and the oil dropping holes are located on the right side of the first oil return holes 202.

As shown in fig. 2, a packing is provided between the cover plate body 21 and the lower end opening of the separation chamber 100.

The working principle of an oil-gas separation structure of the cylinder head cover;

the gas-oil mixture respectively enters from the first air inlet holes 200 and the second air inlet holes 201, the gas mixture entering from the first air inlet holes 200 passes through a separation channel between the separation cover 22 and the cover plate body 21, the gaseous oil is condensed into liquid oil when encountering the separation cover 22 and a plurality of inner stop strips 221 which are uniformly distributed on the left and right of the upper end of the inner side wall of the separation cover 22, and the gaseous oil in the gas mixture entering from the second air inlet holes 201 encounters the inclined cover plate 212 to be condensed into liquid oil; the first step of oil-gas separation is carried out, then two air flows are mixed and flow to the air outlet joint 11 from the passage between the cover plate body 21 and the separation cavity 100, in the process, the mixed air is contacted with the outer surface of the cover plate body 21, the side wall closing the separation cavity 100 and the barrier strip 12, the gaseous oil is condensed into liquid oil, finally the liquid oil condensed in the separation cover 22 flows back to the crankcase from the second oil return hole 203, and the liquid oil condensed outside the separation cover 22 flows back to the crankcase from the first oil return hole 202;

the structure is simple, two air inlets are arranged, and two-component separation structures are arranged in a matching manner, so that oil-gas separation is facilitated; meanwhile, the separation cover 22 is internally and externally provided with a second oil return hole 203 and a first oil return hole 202 respectively, which is beneficial to liquid oil backflow and cannot cause liquid oil aggregation.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, there are variations on the embodiment and the application scope according to the idea of the present invention, and the content of the present description should not be construed as a limitation to the present invention.