CN217681920U

CN217681920U - Prevention pager oil closed respiratory

Info

Publication number: CN217681920U
Application number: CN202221989454.2U
Authority: CN
Inventors: 卞光祥; 邹文鹏; 叶飞; 陈志宇; 李楠
Original assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd; Weichai Power Co Ltd
Current assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd; Weichai Power Co Ltd
Priority date: 2022-07-30
Filing date: 2022-07-30
Publication date: 2022-10-28
Anticipated expiration: 2032-07-30

Abstract

The utility model discloses a prevention calling machine oil closed respiratory, including the engine, be equipped with the cylinder head on the engine, be equipped with integrated respiratory cylinder head cover and engine air intake system on the cylinder head, be equipped with the air inlet pipeline on the engine air intake system, the air inlet pipeline end is equipped with the air filter that admits air, is equipped with respiratory closed pipeline between air inlet pipeline and the integrated respiratory cylinder head cover, be equipped with pressure check valve and pressure anomaly alarm device on the respiratory closed pipeline. The utility model discloses a be equipped with pressure check valve and pressure anomaly alarm device on respiratory closed pipeline, can effectively avoid appearing because of the too big calling oil phenomenon that leads to of closed respiratory pipeline negative pressure.

Description

Prevention pager oil closed respiratory

Technical Field

The utility model relates to a diesel engine technical field especially relates to a prevention calling set oil closed respiratory.

Background

In order to reduce the emission of pollutants of the diesel engine, crankcase waste gas is reintroduced into an air inlet system of the diesel engine to participate in secondary combustion after oil-gas separation, so that the waste gas is completely sealed in the combustion process of the diesel engine, the pollution to the environment is reduced, and the system is called a closed circulation breathing system. And the diesel engine adopting the closed breathing system often has the phenomenon that engine oil is breathed out through the breathing system due to overlarge negative pressure of a crankcase, so that a supercharger and the whole air inlet system are polluted, the performance emission is deteriorated, and the like, and a piston is caused to melt a top in serious conditions. In the prior art, when the phenomena of abnormal blockage and the like of the air filter of the engine cause that the air inlet negative pressure in a pipeline of an air inlet system and the negative pressure of a crankcase of a breathing system are abnormal and overlarge, the phenomenon of calling oil of the breathing system cannot be avoided.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide a prevention pager oil closed respiratory to effectively avoid appearing because of the too big pager oil phenomenon that leads to of closed respiratory pipeline negative pressure.

For solving the technical problem, the utility model discloses an engine is equipped with the cylinder head on the engine, is equipped with integrated respiratory cylinder head cover and engine air intake system on the cylinder head, is equipped with the air inlet pipeline on the engine air intake system, and the air inlet pipeline end is equipped with the air filter that admits air, is equipped with respiratory closed pipeline between air inlet pipeline and the integrated respiratory cylinder head cover, and its structural feature is be equipped with the pressure check valve on the respiratory closed pipeline.

And a pressure abnormity alarm device is arranged on the closed pipeline of the respiratory system.

The inner diameter of the closed pipeline of the respiratory system is 1/5-1/4 of the inner diameter of the air inlet pipeline.

After the structure is adopted, because the closed pipeline of the breathing system is provided with the pressure one-way valve, when the air filter of the air inlet system of the engine is normal, the air inlet negative pressure in the pipeline is normal, the negative pressure in the closed breathing system pipeline is less than P1 (the normal negative pressure, namely the difference between the atmospheric pressure and the pressure in the breathing system pipeline), and the pressure one-way valve is in a closed non-working state; when the air inlet negative pressure in the pipeline of the air inlet system is abnormally excessive due to the abnormal phenomena of air filter blockage and the like of the engine, the negative pressure in the pipeline of the closed breathing system is more than or equal to P1, the pressure check valve is opened to be in a working state, air in the atmosphere flows into the pipeline through the check valve, the negative pressure in the pipeline is released, and engine oil in the engine is prevented from being exhaled through the breathing system. And the breathing system closed pipeline is provided with a pressure abnormity alarm device, when the air inlet negative pressure in the air inlet system pipeline is abnormally too high due to abnormal phenomena such as air filter blockage of the engine, the negative pressure in the closed breathing system pipeline is not less than P1, the pressure abnormity alarm device is triggered, and a client is reminded to detect relevant systems of the engine and maintain the relevant systems.

Drawings

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

Referring to the attached drawings, the preventive pager oil closed type breathing system comprises an engine 1, a cylinder cover 2 is arranged on the engine 1, an integrated breathing system cylinder cover hood 3 and an engine air inlet system 9 are arranged on the cylinder cover 2, an air inlet pipeline 8 is arranged on the engine air inlet system 9, an air inlet air filter 7 is arranged at the tail end of the air inlet pipeline 8, a breathing system closed type pipeline 6 is arranged between the air inlet pipeline 8 and the integrated breathing system cylinder cover hood 3, the cylinder cover 2, the integrated breathing system cylinder cover hood 3, the engine air inlet system 9, the air inlet pipeline 8, the structural relation between the air inlet air filter 7 and the breathing system closed type pipeline 6 and the structure of the air inlet air filter 7 and the breathing system closed type pipeline 6 are the prior art, and are not repeated. A pressure one-way valve 4 and a pressure abnormity warning device 5 are arranged on a respiratory system closed pipeline 6, the inner diameter of the respiratory system closed pipeline 6 is 1/5-1/4 of the inner diameter of an air inlet pipeline 8, the pressure in the respiratory system closed pipeline 6 is about 1/4-1/2 of the pressure in the air inlet pipeline 8, and the specific pressure relation is determined by the pipe diameter, the pipe length, the pipe shape and the respiratory system structure of the specific respiratory system pipeline and the actual air blowby quantity in an engine crankcase; the pressure one-way valve 4 is a general gas pressure one-way valve, and only air in the atmosphere can flow into a closed pipeline of the respiratory system through the one-way valve, otherwise, the one-way valve is in a closed state. When the difference between the atmospheric pressure and the pressure in the breathing system pipeline is larger than or equal to P1 (normal negative pressure, namely the difference between the atmospheric pressure and the pressure in the breathing system pipeline, the same below), the one-way valve is automatically opened, air in the atmosphere flows into the closed pipeline of the breathing system through the one-way valve, and the pressure in the pipeline is lifted and balanced. When the difference between the atmospheric pressure and the pressure in the breathing system pipeline is less than P1 (namely when the atmospheric pressure is close to the pressure in the breathing system pipeline), the pressure one-way valve is in a closed state; the pressure abnormity warning device 5 is a general pressure abnormity warning device, when the difference between the atmospheric pressure and the pressure in the respiratory system pipeline is not less than P1, the warning device recognizes the abnormal pressure, triggers warning and prompts a driver, and detects and maintains the related system of the engine. When the difference between the atmospheric pressure and the pressure in the breathing system pipeline is less than P1 (namely, when the atmospheric pressure is close to the pressure in the breathing system pipeline), the alarm device identifies normal pressure and does not trigger alarm. The structure of the pressure one-way valve 4 and the pressure abnormity warning device 5 belongs to the known technology, the pressure one-way valve 4 and the pressure abnormity warning device 5 can be installed on a closed pipeline 6 of a respiratory system in any known mode, and the pressure abnormity warning device 5 can be integrated into a cab during actual use.

The utility model discloses a theory of operation is: a pressure one-way valve 4 and a pressure abnormity alarm device 5 are arranged on a closed pipeline 6 of the respiratory system, when the air filter of an engine air inlet system is normal, the air inlet negative pressure in the pipeline is normal, the negative pressure in the closed respiratory system pipeline is less than P1, and the pressure one-way valve is in a closed non-working state. When the air inlet negative pressure in the pipeline of the air inlet system is abnormally excessive due to the abnormal phenomena of air filter blockage and the like of the engine, the negative pressure in the pipeline of the closed breathing system is more than or equal to P1, the pressure check valve is opened to be in a working state, air in the atmosphere flows into the pipeline through the check valve, the negative pressure in the pipeline is released, and engine oil in the engine is prevented from being exhaled through the breathing system. In addition, the pressure abnormity warning device is triggered at the same time, so that a client is reminded to detect and maintain the relevant system of the engine. The system can effectively avoid the phenomena that engine oil is breathed out due to overlarge negative pressure of a closed breathing system pipeline, a supercharger and the whole air inlet system are polluted, performance emission deterioration occurs, and the like. The control process of the rear power take-off simulation load of the pressure one-way valve and the pressure abnormity warning device is shown in the table 1.

In the table: p1 is the normal negative pressure, i.e., the difference between atmospheric pressure and the pressure in the breathing system circuit.

Claims

1. The utility model provides a prevention calling machine oil closed respiratory, includes engine (1), is equipped with cylinder head (2) on engine (1), is equipped with integrated respiratory cylinder head cover (3) and engine air intake system (9) on cylinder head (2), is equipped with air intake pipeline (8) on engine air intake system (9), and air intake pipeline (8) end is equipped with air inlet air filter (7), is equipped with respiratory closed pipeline (6), characterized by between air intake pipeline (8) and integrated respiratory cylinder head cover (3) be equipped with pressure check valve (4) on respiratory closed pipeline (6).

2. The breath-protection oil closed breathing system according to claim 1, wherein the breathing system closed pipeline (6) is provided with a pressure abnormity alarm device (5).

3. A preventive pager oil closed type respiratory system as set forth in claim 1 or 2, wherein the inner diameter of the respiratory system closed circuit (6) is 1/5 to 1/4 of the inner diameter of the intake circuit (8).