CN213711140U

CN213711140U - Multistage oil-gas separation system of engine

Info

Publication number: CN213711140U
Application number: CN202022729983.6U
Authority: CN
Inventors: 黄第云
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Marine and Genset Power Co Ltd
Priority date: 2020-11-23
Filing date: 2020-11-23
Publication date: 2021-07-16
Anticipated expiration: 2030-11-23

Abstract

The utility model discloses a multistage oil-gas separation system of engine relates to engine oil-gas separation technical field, solves the technical problem that current oil-gas separation mode is inefficient, the system includes first separating mechanism, second separating mechanism, third separating mechanism, and first separating mechanism is located the cylinder head cover, and first separating mechanism connects second separating mechanism through first oil gas pipe, and second separating mechanism connects third separating mechanism through second oil gas pipe, connects the oil pan through first oil return pipe, and third separating mechanism connects the oil pan through second oil return pipe, connects the booster through the muffler, is equipped with the governing valve on the first oil gas pipe; the pressure sensor and the control module are electrically connected with the pressure sensor and the regulating valve. The utility model discloses a first separating mechanism, second separating mechanism, third separating mechanism can improve the separation efficiency of oil gas to more than 99%.

Description

Multistage oil-gas separation system of engine

Technical Field

The utility model relates to an engine oil-gas separation technical field, more specifically say, it relates to a multistage oil-gas separation system of engine.

Background

When the engine works, a part of mixed gas containing fuel oil, engine oil, water vapor and other steam enters a crankcase due to gaps among the cylinder wall, the piston and the piston ring, and the waste of the fuel oil and the engine oil is caused. Most engines at present adopt a forced crankcase ventilation system, and a part of oil gas in a crankcase is returned to a cylinder for combustion through an intake manifold by utilizing the negative pressure of the intake manifold, so that engine oil steam in the crankcase is inevitably consumed, the engine oil consumption is high, and the performance of the engine is affected by the serious carbon deposition of a valve and a combustion chamber. In addition, a part of oil gas can enter an air filter to cause dust accumulation and even cause the throttle body to be blocked. Therefore, there is a need for effective filtering of crankcase blow-off gasses.

The existing two-stage separation device mainly adopts a labyrinth and centrifugal separation mode, most of oil drops can be separated, and the efficiency can basically reach 90%. However, with the increasing requirements for emissions and energy consumption, the efficiency of existing oil-gas separation devices has not been able to meet the relevant requirements.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, the utility model aims at providing a multistage oil-gas separation system of engine that can raise the efficiency.

The technical scheme of the utility model is that: a multistage oil-gas separation system of an engine comprises a first separation mechanism, a second separation mechanism and a third separation mechanism, wherein the first separation mechanism is located in a cylinder head cover and communicated with a crankcase, the first separation mechanism is connected with the second separation mechanism through a first oil-gas pipe, the second separation mechanism is connected with the third separation mechanism through a second oil-gas pipe, an oil pan is connected through a first oil return pipe, the third separation mechanism is connected with the oil pan through a second oil return pipe, the oil pan is connected with a supercharger through an air return pipe, and a regulating valve is arranged on the first oil-gas pipe; the pressure sensor is used for detecting the air pressure in the crankcase in real time, and the control module is electrically connected with the pressure sensor and the regulating valve.

As further improvement, first separating mechanism includes sealing connection the labyrinth plate of cylinder head cover, form labyrinth chamber between cylinder head cover and the labyrinth plate, the one end of labyrinth plate is equipped with first air inlet, the cylinder head cover be equipped with the first gas outlet that the other end of labyrinth plate corresponds, be equipped with a plurality of baffles and a plurality of oil gallery on the labyrinth plate respectively, it is a plurality of be equipped with the gas passing mouth of dislocation arrangement between the baffle.

Furthermore, a filter screen is arranged in the air passing hole.

Further, the sectional area of the first air inlet is 3-5 times of that of the first air outlet.

Further, the second separation mechanism is a centrifugal oil-gas separator.

Further, the third separating mechanism comprises a shell, a third air inlet and a third air outlet are formed in the two sides of the shell respectively, a filter element is arranged in the shell, and an oil outlet is formed in the shell below the filter element.

Further, the filter element is made of metal wire mesh or fibers.

Furthermore, a bypass pipe is connected in parallel on the first oil gas pipe, and an exhaust fan and a control valve which are electrically connected with the control module are arranged on the bypass pipe.

Further, the control module is an ECU or a singlechip.

Advantageous effects

Compared with the prior art, the utility model, the advantage that has does:

1. the utility model discloses a set up first separating mechanism, second separating mechanism, third separating mechanism, the governing valve, first separating mechanism is labyrinth separation, oil drop more than the main separation 2um particle diameter, second separating mechanism is centrifugal separation, oil drop of main separation 1-2um particle diameter, third separating mechanism filters for the filter core, oil drop below the main separation 1um particle diameter, through first separating mechanism, second separating mechanism, third separating mechanism can improve the separation efficiency of oil gas to more than 99%, can effectively satisfy the requirement of emission and energy consumption, opening degree through the control governing valve makes the actual pressure in the messenger's crankcase within 1 kPa.

2. The utility model discloses a set up bypass pipe, air exhauster, control valve, when the governing valve is actual pressure in the crankcase still is greater than 1kPa when opening entirely, can control air exhauster, control valve and open, make actual pressure in the crankcase within 1 kPa.

Drawings

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

fig. 2 is a schematic structural diagram of a first separating mechanism in the present invention;

FIG. 3 is a schematic structural view of a labyrinth plate according to the present invention;

fig. 4 is a schematic structural diagram of a third separating mechanism in the present invention.

Wherein: 1-a first separation mechanism, 2-a second separation mechanism, 3-a third separation mechanism, 4-a cylinder cover, 5-a crankcase, 6-a first oil gas pipe, 7-a second oil gas pipe, 8-a first oil return pipe, 9-an oil pan, 10-a second oil return pipe, 11-an air return pipe, 12-a supercharger, 13-a regulating valve, 14-a pressure sensor, 15-a labyrinth plate, 16-a first air inlet, 17-a first air outlet, 18-a baffle, 19-an oil return hole, 20-an air vent, 21-a filter screen, 22-a shell, 23-a third air inlet, 24-a third air outlet, 25-a filter element, 26-an oil outlet, 27-a bypass pipe, 28-an exhaust fan and 29-a control valve.

Detailed Description

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

Referring to fig. 1-4, a multi-stage oil-gas separation system for an engine includes a first separation mechanism 1, a second separation mechanism 2, and a third separation mechanism 3. First separating mechanism 1 is located cylinder head cover 4 and communicates crankcase 5, and first separating mechanism 1 connects second separating mechanism 2 through first oil gas pipe 6, and second separating mechanism 2 connects third separating mechanism 3 through second oil gas pipe 7, connects oil pan 9 through first oil return pipe 8, and third separating mechanism 3 returns oil pipe 10 through the second and connects oil pan 9, connects booster 12 through muffler 11, is equipped with governing valve 13 on the first oil gas pipe 6. The system also comprises a pressure sensor 14 for detecting the air pressure in the crankcase 5 in real time and a control module electrically connected with the pressure sensor 14 and the regulating valve 13. First separating mechanism is the labyrinth separation, oil drop more than the main separation 2um particle diameter, second separating mechanism is centrifugal separation, oil drop of main separation 1-2um particle diameter, third separating mechanism filters for the filter core, oil drop below the main separation 1um particle diameter, through first separating mechanism, second separating mechanism, third separating mechanism can improve the separation efficiency of oil gas to more than 99%, can effectively satisfy the requirement of emission and energy consumption, opening through the control governing valve makes the actual pressure in the crankcase within 1 kPa.

In this embodiment, the first separating mechanism 1 includes a labyrinth plate 15 hermetically connected to the cylinder head cover 4, a labyrinth cavity is formed between the cylinder head cover 4 and the labyrinth plate 15, one end of the labyrinth plate 15 is provided with a first air inlet 16, the cylinder head cover 4 is provided with a first air outlet 17 corresponding to the other end of the labyrinth plate 15, the labyrinth plate 15 is provided with a plurality of baffles 18 and a plurality of oil return holes 19, and air passing ports 20 arranged in a staggered manner are provided between the plurality of baffles 18. The air passing opening 20 is internally provided with a filter screen 21, and the filter screen 21 is inserted into the air passing opening 20 from top to bottom. First separating mechanism 1 adopts the labyrinth mode, increases the area of contact of oil-gas mixture, utilizes the swirl that the labyrinth formed, deposits great machine oil hybrid particle, and gaseous and vapor separation go out. The labyrinth plate 15 may be made of steel plate by stamping, or reinforced nylon or cast aluminum. Preferably, the cross-sectional area of the first gas inlet 16 is 3 to 5 times the cross-sectional area of the first gas outlet 17.

The second separation mechanism 2 is a centrifugal oil-gas separator. The second separation mechanism 2 is a gas-driven oil-gas separator, and compressed air of the gas-driven oil-gas separator is from an automobile gas tank or a supercharger 12. The second separating mechanism 2 can also be an oil displacement gas separator, and high-pressure oil of the oil displacement gas separator is sourced from a high-pressure engine oil main oil gallery of the engine.

The third separating mechanism 3 comprises a casing 22, a third air inlet 23 and a third air outlet 24 are respectively arranged on two sides of the casing 22, a filter element 25 is arranged in the casing 22, an oil outlet 26 is arranged on the casing 22 below the filter element 25, and the oil outlet 26 is connected with the second oil return pipe 10. The filter element 25 is made of wire mesh or fiber.

A bypass pipe 27 is connected in parallel on the first oil gas pipe 6, and an exhaust fan 28 and a control valve 29 which are electrically connected with the control module are arranged on the bypass pipe 27. When the actual pressure in the crankcase is still larger than 1kPa when the regulating valve is fully opened, the exhaust fan and the control valve can be controlled to be opened, so that the actual pressure in the crankcase is within +/-1 kPa. The control module is an ECU or a singlechip.

The utility model discloses a multistage oil-gas separation system can realize following control mode at least:

the pressure sensor 14 acquires the actual pressure in the crankcase 5 in real time and sends the actual pressure to the control module;

the control module controls the opening of the regulating valve 13 according to the actual pressure to enable the actual pressure in the crankcase 5 to be within +/-1 kPa;

when the actual pressure in the crankcase 5 is still greater than 1kPa when the regulating valve 13 is fully open, the control module controls the suction fan 28 and the control valve 29 to open so that the actual pressure in the crankcase 5 is within ± 1 kPa.

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

Claims

1. The multistage oil-gas separation system of the engine is characterized by comprising a first separation mechanism (1), a second separation mechanism (2) and a third separation mechanism (3), wherein the first separation mechanism (1) is located in a cylinder head cover (4) and communicated with a crankcase (5), the first separation mechanism (1) is connected with the second separation mechanism (2) through a first oil-gas pipe (6), the second separation mechanism (2) is connected with the third separation mechanism (3) through a second oil-gas pipe (7), and is connected with an oil pan (9) through a first oil-gas pipe (8), the third separation mechanism (3) is connected with the oil pan (9) through a second oil-gas pipe (10), is connected with a supercharger (12) through an air return pipe (11), and is provided with a regulating valve (13) on the first oil-gas pipe (6); the pressure sensor (14) for detecting the air pressure in the crankcase (5) in real time and the control module electrically connected with the pressure sensor (14) and the regulating valve (13) are further included.

2. The multistage oil-gas separation system of the engine according to claim 1, characterized in that the first separation mechanism (1) comprises a labyrinth plate (15) which is in sealing connection with the cylinder head cover (4), a labyrinth cavity is formed between the cylinder head cover (4) and the labyrinth plate (15), one end of the labyrinth plate (15) is provided with a first air inlet (16), the cylinder head cover (4) is provided with a first air outlet (17) corresponding to the other end of the labyrinth plate (15), the labyrinth plate (15) is respectively provided with a plurality of baffles (18) and a plurality of oil return holes (19), and a plurality of air passing holes (20) which are arranged in a staggered manner are formed between the baffles (18).

3. The engine multi-stage oil-gas separation system according to claim 2, characterized in that a filter screen (21) is arranged in the air passing opening (20).

4. The engine multi-stage oil-gas separation system according to claim 2, wherein the cross-sectional area of the first gas inlet (16) is 3-5 times the cross-sectional area of the first gas outlet (17).

5. The engine multi-stage oil-gas separation system according to claim 1, characterized in that the second separation mechanism (2) is a centrifugal oil-gas separator.

6. The multistage oil-gas separation system of the engine as claimed in claim 1, wherein the third separation mechanism (3) comprises a housing (22), a third air inlet (23) and a third air outlet (24) are respectively arranged on two sides of the housing (22), a filter element (25) is arranged in the housing (22), and an oil outlet (26) is arranged on the housing (22) below the filter element (25).

7. The engine multistage oil-gas separation system according to claim 6, characterized in that the filter element (25) is made of wire mesh or fiber.

8. The multi-stage oil-gas separation system of the engine according to claim 1, wherein a bypass pipe (27) is connected in parallel to the first oil-gas pipe (6), and an exhaust fan (28) and a control valve (29) which are electrically connected with the control module are arranged on the bypass pipe (27).

9. The engine multi-stage oil-gas separation system according to claim 1, wherein the control module is an ECU or a single chip microcomputer.