阅读说明：本技术 一种发动机油气分离系统 (Oil-gas separation system of engine ) 是由 黄第云 沈捷 林铁坚 黄永仲 李伟 陈悦 毛平安 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种发动机油气分离系统,涉及油气分离技术领域,解决油气分离效率低差的技术问题,系统包括迷宫结构、主动离心式油气分离器、三通接头、油滴收集管、滤芯式过滤机构、油滴浓度光度计、控制模块,迷宫结构的输入口连通曲轴箱,迷宫结构的输出口设有调压阀,调压阀通过连接管依次连接主动离心式油气分离器、三通接头、油滴收集管、滤芯式过滤机构、油滴浓度光度计、发动机进气管,主动离心式油气分离器的转轴连接有电机,主动离心式油气分离器通过回油管连通曲轴箱,三通接头的下端设有储油罐,油滴收集管为向上延伸的结构,曲轴箱设有第一压力传感器,控制模块电性连接调压阀、第一压力传感器、电机、油滴浓度光度计。(The invention discloses an oil-gas separation system of an engine, which relates to the technical field of oil-gas separation and solves the technical problem of low oil-gas separation efficiency, and comprises a labyrinth structure, a driving centrifugal oil-gas separator, a three-way joint, an oil drop collecting pipe, a filter element type filtering mechanism, an oil drop concentration photometer and a control module, wherein the input port of the labyrinth structure is communicated with a crankcase, the output port of the labyrinth structure is provided with a pressure regulating valve, the pressure regulating valve is sequentially connected with the driving centrifugal oil-gas separator, the three-way joint, the oil drop collecting pipe, the filter element type filtering mechanism, the oil drop concentration photometer and an engine air inlet pipe through connecting pipes, a rotating shaft of the driving centrifugal oil-gas separator is connected with a motor, the driving centrifugal oil-gas separator is communicated with the crankcase through an oil return pipe, the lower end of the three-way joint is provided with an oil storage tank, the oil drop collecting pipe is of an upward extending structure, and the crankcase is provided with a first pressure sensor, the control module is electrically connected with the pressure regulating valve, the first pressure sensor, the motor and the oil drop concentration photometer.)

1. The utility model provides an engine oil-gas separation system, is including the labyrinth structure that is located cylinder head (1), its characterized in that still includes initiative centrifugal oil and gas separator (2), three way connection (3), oil droplet collecting pipe (4), filter element formula filtering mechanism (5), oil droplet concentration photometer (6), control module, labyrinth structure's input port (7) intercommunication crankcase (8), labyrinth structure's delivery outlet (9) are equipped with air-vent valve (10), air-vent valve (10) connect gradually through connecting pipe (11) initiative centrifugal oil and gas separator (2), three way connection (3), oil droplet collecting pipe (4), filter element formula filtering mechanism (5), oil droplet concentration photometer (6), engine intake pipe (12), the pivot of initiative centrifugal oil and gas separator (2) is connected with motor (13), initiative centrifugal oil and gas separator (2) are through returning oil pipe (14) intercommunication crankcase (8), the lower extreme of three way connection (3) is equipped with oil storage tank (15), oil drip collecting pipe (4) is the structure that upwards extends, crankcase (8) is equipped with first pressure sensor (16), control module electric connection air-vent valve (10), first pressure sensor (16), motor (13), oil drip concentration photometer (6).

2. The engine oil-gas separation system of claim 1, characterized in that the control module detects the pressure in the crankcase (8) through the first pressure sensor (16) and controls the opening of the pressure regulating valve (10) and the rotation speed of the motor (13) to make the pressure in the crankcase (8) meet the requirement.

3. The engine oil-gas separation system of claim 1, wherein the control module detects the oil content in the output oil-gas by the oil drop concentration photometer (6), and informs a user to check the oil-gas separation system when the oil content exceeds a set range.

4. The engine oil-gas separation system according to claim 1, wherein the oil drop collecting pipe (4) comprises a pipe body (17), baffle plates (18) are arranged in the pipe body (17) at intervals up and down, and a staggered structure is arranged between every two adjacent baffle plates (18).

5. The engine oil-gas separation system of claim 4, characterized in that the baffle (18) is of an inclined and upward extending structure, an air passing groove (19) is arranged between the upper end of the baffle (18) and the inner wall of the pipe body (17), and the lower end of the baffle (18) is provided with the oil leakage hole (20).

6. An engine oil and gas separation system according to claim 4, characterized in that the upper end of the baffle plate (18) is provided with a downwardly extending hook plate (21).

7. The engine oil-gas separation system of claim 4, characterized in that a fan (22) electrically connected with the control module is arranged on the outer side of the pipe body (17).

8. The engine oil-gas separation system according to claim 1, wherein the filter element type filtering mechanism (5) comprises a casing (23), a filter element (24) is arranged in the casing (23), a second pressure sensor (25) supporting the filter element (24) is arranged on the bottom wall of the casing (23), and the second pressure sensor (25) is electrically connected with the control module.

9. An engine oil and gas separation system according to claim 1, characterized in that the connecting pipe (11) at the top of the oil drop collecting pipe (4) is arranged against the top of the engine nacelle.

10. The engine oil-gas separation system according to claim 1, characterized in that a one-way valve (26) is arranged on a connecting pipe (11) between the oil drop concentration photometer (6) and the engine air inlet pipe (12).

Technical Field

The invention relates to the technical field of oil-gas separation, in particular to an oil-gas separation system of an engine.

Background

During normal operation of the engine, a part of unburned combustible mixture and combustion exhaust gas in the cylinder enters the crankcase through three paths: 1. piston ring end gap, piston ring and cylinder gap and piston ring and ring groove gap; 2. valve and valve guide clearance; 3. supercharger bearing clearances. These blow-by gases raise the temperature in the crankcase, increasing the amount of oil evaporated from the oil pan. Because the lubrication of some parts in the crankcase adopts splash lubrication, when oil mist generated by the splash lubrication in the crankcase and oil vapor evaporated at high temperature are mixed with the blowby gas of the cylinder, ultra-fine aerosol with most particles with the particle size less than 1 mu m is formed, and the process is the formation process of the oil-gas mixture in the blowby gas of the crankcase.

The existing crankcase ventilation closed circulation system mainly adopts a labyrinth and an oil-gas separator mode, namely, a labyrinth is arranged on a cylinder cover, oil gas enters the oil-gas separator after passing through the labyrinth and then is output to an air inlet main pipe, most of oil drops can be separated, and the efficiency can basically reach 90%. However, with the continuous improvement of the requirements on emission and energy consumption, the efficiency of the existing oil-gas separation mode cannot meet the requirements.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and aims to provide an oil-gas separation system of an engine, which can improve the oil-gas separation efficiency.

The technical scheme of the invention is as follows: the utility model provides an engine oil-gas separation system, is including the labyrinth structure that is located the cylinder head, still includes initiative centrifugal oil and gas separator, three way connection, oil droplet collecting pipe, filter element formula filtering mechanism, oil droplet concentration photometer, control module, labyrinth structure's input port intercommunication crankcase, labyrinth structure's delivery outlet is equipped with the air-vent valve, the air-vent valve connects gradually through the connecting pipe initiative centrifugal oil and gas separator, three way connection, oil droplet collecting pipe, filter element formula filtering mechanism, oil droplet concentration photometer, engine intake pipe, initiative centrifugal oil and gas separator's pivot is connected with the motor, initiative centrifugal oil and gas separator passes through oil return pipe intercommunication the crankcase, three way connection's lower extreme is equipped with the oil storage tank, oil droplet collecting pipe is the structure of upwards extending, the crankcase is equipped with first pressure sensor, the control module is electrically connected with the pressure regulating valve, the first pressure sensor, the motor and the oil drop concentration photometer.

As a further improvement, the control module detects the pressure in the crankcase through the first pressure sensor, and controls the opening of the pressure regulating valve and the rotation speed of the motor to enable the pressure in the crankcase to meet the requirement.

Further, the control module detects the oil content in the output oil gas through the oil drop concentration photometer, and informs a user to check the oil-gas separation system when the oil content exceeds a set range.

Furthermore, the oil drop collecting pipe comprises a pipe body, baffle plates which are arranged at an upper interval and a lower interval are arranged in the pipe body, and a staggered structure is arranged between every two adjacent baffle plates.

Further, the baffle is the structure that the slope upwards extends, be equipped with between the upper end of baffle and the body inner wall and cross the gas groove, the lower extreme of baffle is equipped with the oil leak hole.

Furthermore, the upper end of the baffle is provided with a hook plate extending downwards.

Further, the outside of body is equipped with electric connection control module's fan.

Further, filter element formula filtering mechanism includes the casing, be equipped with the filter core in the casing, the diapire of casing is equipped with the support the second pressure sensor of filter core, second pressure sensor electric connection control module.

Further, the connecting pipe at the top of the oil drop collecting pipe is arranged close to the top of the engine cabin.

Furthermore, a one-way valve is arranged on a connecting pipe between the oil drop concentration photometer and an engine air inlet pipe.

Advantageous effects

Compared with the prior art, the invention has the advantages that:

the oil-gas separation device mainly filters oil drops with the particle size of more than 2 microns through a labyrinth structure, then the oil gas passes through the active centrifugal oil-gas separator to separate most of the oil drops, the oil gas passes through the oil drop collecting pipe, oil mist or small oil drops are condensed into oil drops with larger particle sizes under the cooling action of the fan and fall into the oil storage tank to be collected, finally the oil drops with the particle size of less than 1 micron are separated through the filter element type filtering mechanism, the oil-gas separation efficiency can reach more than 99%, the oil content in the output oil gas is detected through the oil drop concentration photometer, and a user is informed to check the oil-gas separation system when the oil content exceeds a set range.

Drawings

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

FIG. 2 is a schematic view of an oil drop collection tube according to the present invention;

fig. 3 is a schematic structural view of the filter element type filtering mechanism of the present invention.

Wherein: 1-cylinder cover, 2-active centrifugal oil-gas separator, 3-three-way joint, 4-oil drop collecting pipe, 5-filter element type filtering mechanism, 6-oil drop concentration photometer, 7-input port, 8-crankcase, 9-output port, 10-pressure regulating valve, 11-connecting pipe, 12-engine air inlet pipe, 13-motor, 14-oil return pipe, 15-oil storage tank, 16-first pressure sensor, 17-pipe body, 18-baffle, 19-air passing groove, 20-oil leaking hole, 21-hook plate, 22-fan, 23-shell, 24-filter element, 25-second pressure sensor and 26-one-way valve.

Detailed Description

The invention will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 1-3, an engine oil-gas separation system comprises a labyrinth structure positioned in a cylinder cover 1, and further comprises an active centrifugal oil-gas separator 2, a three-way joint 3, an oil drop collecting pipe 4, a filter element type filtering mechanism 5, an oil drop concentration photometer 6 and a control module, wherein the control module is an ECU or a single chip microcomputer. An input port 7 of the labyrinth structure is communicated with a crankcase 8, an output port 9 of the labyrinth structure is provided with a pressure regulating valve 10, and the pressure regulating valve 10 is sequentially connected with an active centrifugal oil-gas separator 2, a three-way joint 3, an oil drop collecting pipe 4, a filter element type filtering mechanism 5, an oil drop concentration photometer 6 and an engine air inlet pipe 12 through a connecting pipe 11. The rotating shaft of the driving centrifugal type oil-gas separator 2 is connected with a motor 13, the driving centrifugal type oil-gas separator 2 is communicated with a crankcase 8 through an oil return pipe 14, an oil storage tank 15 is arranged at the lower end of the three-way joint 3, and the oil drop collecting pipe 4 is of an upward extending structure. The crankcase 8 is provided with a first pressure sensor 16, and the control module is electrically connected with the pressure regulating valve 10, the first pressure sensor 16, the motor 13 and the oil drop concentration photometer 6.

The control module detects the pressure in the crankcase 8 through the first pressure sensor 16, and controls the opening of the pressure regulating valve 10 and the rotation speed of the motor 13 to enable the pressure in the crankcase 8 to meet the requirement. The control module detects the oil content in the output oil gas through the oil drop concentration photometer 6, and informs a user to check the oil-gas separation system when the oil content exceeds a set range.

The oil drop collecting pipe 4 comprises a pipe body 17, baffle plates 18 which are arranged at intervals up and down are arranged in the pipe body 17, and a staggered structure is arranged between every two adjacent baffle plates 18. The baffle 18 is a structure extending obliquely upwards, an air passing groove 19 is arranged between the upper end of the baffle 18 and the inner wall of the pipe body 17, and an oil leakage hole 20 is arranged at the lower end of the baffle 18. The upper end of the baffle plate 18 is provided with a downwardly extending hook plate 21. The outer side of the tube body 17 is provided with a fan 22 electrically connected with the control module. Make oil mist or little oil drop condense into the oil drop of great particle diameter at the refrigerated effect of fan 22 to make the oil drop separate under baffle 18's effect, and collect at oil storage tank 15, the lateral wall of oil storage tank 15 is equipped with the observation window, and oil storage tank 15 threaded connection is at the lower extreme of three way connection 3, pours the oil water mixture in the oil storage tank 15 when oil storage tank 15 is full, or pours the oil water mixture in the oil storage tank 15 at regular intervals (like 1 month).

The filter element type filtering mechanism 5 comprises a shell 23, a filter element 24 is arranged in the shell 23, a second pressure sensor 25 for supporting the filter element 24 is arranged on the bottom wall of the shell 23, and the second pressure sensor 25 is electrically connected with the control module. The filter cartridge 24 filters the oil droplets with a gradual increase in weight, and the control module notifies the user to replace the filter cartridge 24 when the second pressure sensor 25 detects that the weight of the filter cartridge 24 exceeds a set value.

The connecting pipe 11 at the top of the oil drop collecting pipe 4 is arranged along the top of the engine cabin, so that the height of the oil drop collecting pipe 4 can be increased as much as possible, and the oil-gas separation effect is improved.

A one-way valve 26 is arranged on a connecting pipe 11 between the oil drop concentration photometer 6 and the engine air inlet pipe 12, so that the air inlet backflow can be prevented.

The oil-gas separation device mainly filters oil drops with the particle size of more than 2 microns through a labyrinth structure, then the oil gas passes through the active centrifugal oil-gas separator to separate most of the oil drops, the oil gas passes through the oil drop collecting pipe, oil mist or small oil drops are condensed into oil drops with larger particle sizes under the cooling action of the fan and fall into the oil storage tank to be collected, finally the oil drops with the particle size of less than 1 micron are separated through the filter element type filtering mechanism, the oil-gas separation efficiency can reach more than 99%, the oil content in the output oil gas is detected through the oil drop concentration photometer, and a user is informed to check the oil-gas separation system when the oil content exceeds a set range.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.