CN212563381U - Negative pressure oil-gas separator respirator - Google Patents
Negative pressure oil-gas separator respirator Download PDFInfo
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- CN212563381U CN212563381U CN202020799827.4U CN202020799827U CN212563381U CN 212563381 U CN212563381 U CN 212563381U CN 202020799827 U CN202020799827 U CN 202020799827U CN 212563381 U CN212563381 U CN 212563381U
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Abstract
The utility model discloses a negative pressure oil-gas separator respirator, including respirator body (1), respirator lid (5), the respirator bottom is equipped with inside and outside linking arm (12) of connecting former separator to and meticulous damping net (3) on the linking arm including setting up, form annular inlet channel (7), characterized by between the inside and outside linking arm: the cover above the respirator body is internally provided with a flow pressure regulating device (6), the cover and the inner wall of the respirator body are separated into an external annular airflow cavity (8) and a middle columnar airflow regulating cavity (9) through the device, a driving air source channel (11) is arranged below the airflow regulating cavity, the small opening end of the driving air source channel is communicated with an air outlet pipe 4 provided with an expansion chamber (12), one side of the large opening end of the driving air source channel is a driving air source flow cavity (10), a movable driving air source pressure regulating valve (2) is arranged in the cavity, and a channel is reserved between the airflow regulating cavity and the expansion chamber.
Description
Technical Field
The utility model relates to a crankcase oil-gas separation system of automobile engine especially relates to a negative pressure oil-gas separator respirator.
Background
As is well known, when an automobile engine works, a certain gap is always formed between a piston ring and a cylinder sleeve of the engine, and the gap is continuously enlarged along with the abrasion of the piston ring, so that part of combustible mixed gas and combusted waste gas always flow into a crankcase of the engine from the gap, the pressure in the crankcase is increased, and engine oil leaks and runs off from a crankshaft oil seal, a crankcase gasket, an oil pan gasket and the like; the waste gas after combustion which flows into the crankcase is continuously mixed with the engine oil during the working period of the engine due to high temperature, so that the engine oil is carbonized at high temperature, becomes thin and has deteriorated performance, and secondary waste gas is generated at the same time; the water vapor in the secondary exhaust gas is condensed in the engine oil to form foam, which affects the supply of the engine oil, and the phenomenon is particularly serious in winter; sulfur dioxide in the secondary waste gas generates sulfurous acid when meeting water, and the sulfurous acid generates sulfuric acid in the air, so that not only is the engine oil deteriorated, but also engine parts are corroded; therefore, the waste gas in the crankcase of the engine must be discharged to prevent the engine oil from deteriorating and leaking due to overlarge pressure; however, since the crankcase waste gas contains a large amount of combustible gas, combustion waste gas and secondary waste gas in the crankcase, and also contains a large amount of water vapor, sulfur dioxide, liquid engine oil, vaporized engine oil, carbon black generated by high-temperature deterioration of the engine oil and the like, if the complex oil-gas mixed gas is directly discharged into the atmosphere, not only is the environment seriously polluted, but also a large amount of engine oil consumption is brought.
The automobile emission standard published in China is specified as follows: crankcase exhaust gases from class a and class B vehicles are not allowed to vent directly to atmosphere; the Euro II and Euro III automotive emission standards also specify: crankcase waste gas of all engines must be separated again, engine oil is recycled to the crankcase, and the waste gas enters the combustion chamber again for combustion and then is discharged uniformly; meanwhile, PM2.5 monitoring started in China from 2012 does not allow direct emission to the atmosphere.
The problem of crankcase waste gas treatment has been better solved to current patent 201210199599.7-independent outer hanging multistage oil-gas separation assembly, but this technical scheme can not form stronger negative pressure, can't effectively suck out crankcase waste gas, consequently can't make the crankcase maintain under certain negative pressure state, causes the risk that oil leak appears in crankcase internal pressure more than atmospheric pressure, can't effectively reach the latest "[ light automobile pollutant emission limit value and measuring method (sixth stage in china) ] crankcase pollutant emission test (III type test) requirement, the engine is under any operating mode, crankcase internal pressure must not be greater than atmospheric pressure" the regulation.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an application "venturi" benefit forms the negative pressure in order to overcome prior art not enough, and cooperation crude oil gas separator is effective just to suck out crankcase waste gas, makes the engine under any operating mode, can both maintain under certain negative pressure state in the crankcase, prevents that crankcase internal pressure is greater than atmospheric pressure and leads to a negative pressure oil gas separator respirator of oil leak risk.
The specific technical scheme is as follows: a respirator with negative pressure oil-gas separator comprises a respirator body and a respirator cover, wherein the bottom of the respirator is provided with an inner connecting arm and an outer connecting arm which are connected with an original separator, and a fine damping net which is arranged on the inner connecting arm, an annular air inlet channel is formed between the inner connecting arm and the outer connecting arm.
The flow pressure regulating device comprises a flow pressure regulating valve diaphragm, a flow pressure regulating valve spring and a spring seat, wherein the flow pressure regulating valve spring is sleeved between the diaphragm and the spring seat and is positioned in the airflow regulating cavity, and the spring seat is fixed on the wall of the driving air source channel.
The expansion chamber is trumpet-shaped, and the caliber of the expansion chamber is gradually increased from inside to outside.
The driving air source pressure regulating valve comprises a tubular valve wall, a valve core, a valve seat and a regulating spring, wherein the valve wall is formed by integrally molding a respirator, the valve seat is arranged at the bottom of the valve core and is sleeved in the valve wall together, the regulating spring is sleeved at the tip end of the valve core, and the other end of the regulating spring abuts against the outer edge of the large opening of the driving air source channel.
The valve core is in a hollow column shape, a plurality of parallel ribs are arranged on the outer wall of the valve core, a driving gas channel is formed between every two adjacent ribs, and the tip end of the valve core is in a conical shape.
The technical scheme has the advantages that: 1. the device can be directly sleeved on a separation foundation part of a crude oil gas separator and can be used; 2. the respirator body utilizes a Venturi effect to generate negative pressure to actively suck out waste gas of a crankcase, so that the pressure in the crankcase can be maintained in a certain negative pressure state under any working condition of the engine (according to the requirements of a crankcase pollutant emission test (III test) in the emission limit value and the measurement method of pollutants for light automobiles (sixth stage of China), the pressure in the crankcase cannot be greater than atmospheric pressure under any working condition of the engine), the risk of oil leakage caused by the fact that the pressure in the crankcase is greater than the atmospheric pressure is prevented, and the engine meets the national emission regulation; 3. the driving air source pressure regulating valve can be used for actively regulating the size of the air inlet under the combined action of the driving air source pressure regulating valve and the spring under the condition of air source pressure fluctuation, so that the generated negative pressure is always kept unchanged; 4. the negative pressure in the crankcase can be adjusted under the combined action of the flow pressure adjusting valve membrane and the spring.
Drawings
FIG. 1 is a schematic sectional view of a negative pressure oil-gas separator respirator of the present invention;
fig. 2 is a schematic view of a three-dimensional structure of a valve core of a driving air source pressure regulating valve of a negative pressure oil-gas separator respirator.
Detailed Description
The flow pressure adjusting device 6 comprises a flow pressure adjusting valve diaphragm 6-1, a flow pressure adjusting valve spring 6-2 and a spring seat, wherein the flow pressure adjusting valve spring is sleeved between the diaphragm and the spring seat and is positioned in the air flow adjusting cavity, and the spring seat is fixed on the wall of the driving air source channel.
The expansion chamber 13 is trumpet-shaped, and the caliber of the expansion chamber is gradually increased from inside to outside.
The driving air source pressure regulating valve comprises a tubular valve wall 2-7, a valve core 2-1, a valve seat 2-2 and a regulating spring 2-3, wherein the valve wall is formed by integrally molding a respirator, the valve seat is arranged at the bottom of the valve core and is sleeved in the valve wall together, the regulating spring is sleeved at the tip end part 2-4 of the valve core, and the other end of the regulating spring abuts against the outer edge of a large opening of a driving air source channel.
The valve core is in a hollow cylindrical shape, the outer wall of the valve core is provided with a plurality of parallel ribs 2-6, a driving gas channel 2-5 is formed between every two adjacent ribs, and the tip end of the valve core is in a conical shape.
The technical scheme of the embodiment can be seen that: the driving air source flow cavity 10, the driving air source channel 11 and the expansion chamber 13 form a structure similar to a Venturi tube, according to the Venturi tube principle, when a driving air source sequentially passes through the air source flow cavity, the air source channel and the expansion chamber, negative pressure is formed at the root of the expansion chamber, negative pressure suction can be generated on the air flow adjusting cavity 9, namely negative pressure suction is generated on a crankcase, and after crankcase waste gas passes through the crude oil gas separator, the crankcase waste gas rapidly passes through the air flow inlet channel 7, the air flow cavity 8 and the air flow adjusting cavity 9 and then enters the expansion chamber 13 to be discharged together with the driving air flow (namely, the separated mixed gas enters the rear end of the turbocharger).
The working principle of the driving air source pressure regulating valve is that after a compressed air source of an automobile air storage tank enters a valve seat of the driving air source pressure regulating valve, the compressed air enters a gas channel 2-5 on the side wall of a valve core from the bottom of the valve core, the gas channel is formed by the side wall of the valve core, a tubular valve wall 2-7 and adjacent ribs 2-6, and then high-pressure driving gas sequentially enters a driving air source flow cavity 10, a driving air source channel 11 and an expansion chamber 13 from the gas channel and is discharged. When the pressure of the driving air source is increased, the force borne by the valve core is enhanced, the valve core moves forwards by overcoming the spring, the tip end of the valve core is plugged into the driving air source channel, and the gas flow surface of the channel is gradually reduced, namely, the gas flow is reduced when the pressure of the driving air source is increased, and the root negative pressure of the expansion chamber is ensured to be stable; in a similar way, when the pressure of the driving air source is reduced, the force borne by the valve core is reduced, the valve core moves backwards under the action of the spring, the channel of the driving air source is opened, namely the air flow is increased when the pressure of the driving air source is reduced, and the stability of the root negative pressure of the expansion chamber is also ensured. Therefore, the air source pressure regulating valve is driven to actively regulate the size of the air inlet under the combined action of the air source pressure fluctuation and the spring, so that the generated negative pressure is always kept unchanged.
The working principle of the flow pressure regulating device 6 is that the flow surfaces of the airflow cavity 8 and the airflow regulating cavity 9 can be reduced by applying pressure to the diaphragm 6-1 of the flow pressure regulating valve and overcoming the elasticity of a spring, so that the negative pressure is reduced; on the contrary, the adjusting diaphragm is released, and under the action of the spring, the flow surface of the airflow cavity and the airflow adjusting cavity is increased, the gas flow rate is increased, and the negative pressure is enhanced. Therefore, the negative pressure in the crankcase can be adjusted through the combined action of the flow pressure adjusting valve membrane and the spring.
Claims (5)
1. The utility model provides a negative pressure oil-gas separator respirator, includes respirator body (1), respirator lid (5), and the respirator bottom is equipped with inside and outside linking arm (12) of connecting former separator to and set up meticulous damping net (3) on the linking arm, form annular inlet channel (7), characterized by between the inside and outside linking arm: the cover above the respirator body is internally provided with a flow pressure regulating device (6), the cover and the inner wall of the respirator body are separated into an external annular airflow cavity (8) and a middle columnar airflow regulating cavity (9) through the device, a driving air source channel (11) is arranged below the airflow regulating cavity, the small opening end of the driving air source channel is communicated with an air outlet pipe 4 provided with an expansion chamber (13), one side of the large opening end of the driving air source channel is a driving air source flow cavity (10), a movable driving air source pressure regulating valve (2) is arranged in the cavity, and a channel is reserved between the airflow regulating cavity and the expansion chamber.
2. The negative pressure oil-gas separator respirator of claim 1, wherein: the flow pressure regulating device (6) comprises a flow pressure regulating valve diaphragm (6-1), a flow pressure regulating valve spring (6-2) and a spring seat, wherein the flow pressure regulating valve spring is sleeved between the diaphragm and the spring seat and is positioned in the air flow regulating cavity, and the spring seat is fixed on the wall of the driving air source channel.
3. The negative pressure oil-gas separator respirator of claim 1, wherein: the expansion chamber (13) is trumpet-shaped, and the caliber of the expansion chamber is gradually increased from inside to outside.
4. The negative pressure oil-gas separator respirator of claim 1, wherein: the driving air source pressure regulating valve comprises a tubular valve wall (2-7), a valve core (2-1), a valve seat (2-2) and a regulating spring (2-3), wherein the valve wall is formed by integrally molding a respirator, the valve seat is arranged at the bottom of the valve core and is sleeved in the valve wall together, the regulating spring is sleeved at the tip end (2-4) of the valve core, and the other end of the regulating spring abuts against the outer edge of a large opening of a driving air source channel.
5. The negative pressure oil-gas separator respirator of claim 4, wherein: the valve core is in a hollow column shape, the outer wall of the valve core is provided with a plurality of parallel ribs (2-6), a driving gas channel (2-5) is formed between every two adjacent ribs, and the tip end of the valve core is in a conical shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020799827.4U CN212563381U (en) | 2020-05-14 | 2020-05-14 | Negative pressure oil-gas separator respirator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020799827.4U CN212563381U (en) | 2020-05-14 | 2020-05-14 | Negative pressure oil-gas separator respirator |
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| CN212563381U true CN212563381U (en) | 2021-02-19 |
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| CN202020799827.4U Active CN212563381U (en) | 2020-05-14 | 2020-05-14 | Negative pressure oil-gas separator respirator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985872A (en) * | 2021-05-20 | 2021-06-18 | 成都康拓兴业科技有限责任公司 | Oil mist separation and transportation test bed and test method of aviation oil mist separator |
-
2020
- 2020-05-14 CN CN202020799827.4U patent/CN212563381U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985872A (en) * | 2021-05-20 | 2021-06-18 | 成都康拓兴业科技有限责任公司 | Oil mist separation and transportation test bed and test method of aviation oil mist separator |
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