CN219176467U

CN219176467U - Oil return joint mechanism of air-cooled diesel engine

Info

Publication number: CN219176467U
Application number: CN202320415096.2U
Authority: CN
Inventors: 刘海云; 郭禹; 侯轩; 张超; 王国民
Original assignee: Beinei Diesel Engine Tianjin Co ltd
Current assignee: Beinei Tianjin Technology Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-06-13
Anticipated expiration: 2033-03-07

Abstract

The utility model discloses an oil return joint mechanism of an air-cooled diesel engine, which relates to the technical field of electric control air-cooled diesel engines and specifically comprises a mechanism body, wherein a machine body fixing hole is formed in the middle of one end of the mechanism body, an oil sprayer oil return hole is formed in the top of one end, close to the machine body fixing hole, of an inner cavity of the mechanism body, a high-pressure oil pump oil return hole is formed in the top of the other end of the inner cavity of the mechanism body, an oil return check valve is arranged in the inner cavity of the mechanism body, and a fuel system oil return pipe joint hole is formed in the middle of the other end of the mechanism body. The oil return joint mechanism of the air-cooled diesel engine is simple in structure and simple in use method, except for the conventional oil return function, the oil return joint mechanism is upwards connected with the first inlet of the oil return joint body through the oil return outlet of the high-pressure oil pump, and at the moment, the oil return pipeline passes through a small section of upwards oil return pipeline, so that fuel in the pipeline cannot be completely discharged, air cannot flow back after the effect of thermal expansion and cold contraction, and a series of starting problems caused by air inlet of the low-pressure oil pipeline are avoided.

Description

Oil return joint mechanism of air-cooled diesel engine

Technical Field

The utility model relates to the technical field of electric control air-cooled diesel engines, in particular to an oil return joint mechanism of an air-cooled diesel engine.

Background

The high-pressure common rail system in the existing electronic control fuel injection technology generally comprises a high-pressure fuel supply pump, a common rail pipe, a fuel injector and an electronic control unit, wherein the fuel supply system is divided into a high-pressure fuel part and comprises: high-pressure oil pump, common rail pipe and oil sprayer; a low pressure fuel portion comprising: the device comprises a fuel tank, a fuel filter, a high-pressure oil pump and an oil return pipe.

When the fuel supply system starts to work, the fuel pump of the high-pressure oil pump pumps the fuel sucked from the fuel tank through the filtering action of the fuel filter, then enters the high-pressure common rail pump to pressurize, stabilizes the high-pressure fuel in the common rail pipe, and finally completes the fuel injection of the fuel injector through the ECU control signal, so that the ignition start of the diesel engine is realized, and the residual fuel in the high-pressure oil pump, the fuel injector and the common rail pipe (without returning oil in part of the common rail pipes) flows back to the fuel tank through the return oil pipe. When the diesel engine is stopped or is not used for a long time, the residual fuel in the fuel return pipe flows back to the fuel tank due to the gravity, and at the moment, the fuel return pipe is in an empty state, the thermal expansion and cold contraction are easy to enter air, so that the low-pressure fuel pipe is used for air intake, and when the diesel engine is restarted, the low-pressure fuel pipe is used for air intake, so that the normal supply of the fuel can be blocked after the diesel engine is pressurized by the high-pressure fuel pump, the diesel engine is difficult to start, and even a fuel system is damaged under compression, and the problems of engine overhaul and high-pressure fuel pump replacement are caused.

Therefore, a new oil return mode of a high-pressure common rail diesel engine is needed to avoid air entering from an oil return pipeline after a hot car of the diesel engine is stopped, so that the starting performance of the diesel engine is improved, and all components in a fuel supply system of the diesel engine are protected.

Disclosure of Invention

The utility model provides an oil return joint mechanism of an air-cooled diesel engine, which solves the problems that the diesel engine is difficult to start or the diesel engine needs to be manually exhausted every time when the low-pressure oil way of the diesel engine exists air in the prior art.

The utility model provides the following technical scheme: the utility model provides an oil return joint mechanism of forced air cooling diesel engine, is upwards connected through high-pressure oil pump oil return export and the first entry of the oil return joint body, and the oil return pipeline passes through the pipeline of a short section upwards oil return this moment for the fuel in the pipeline can not be completely emptied, and air can't flow back after the expend with heat and contract with cold effect, thereby has avoided a series of starting problems that the low pressure oil way admitted air to bring.

The utility model provides an oil return joint mechanism of forced air cooling diesel engine, includes the mechanism body, the middle part of mechanism body one end is equipped with the organism fixed orifices, the top that the mechanism body inner chamber is close to the one end of organism fixed orifices is equipped with the sprayer oil return hole, the top of mechanism body inner chamber other end is equipped with the high-pressure oil pump oil return hole, be equipped with the oil return check valve in the inner chamber of mechanism body, the middle part of mechanism body other end is equipped with fuel system oil return pipe joint hole, the oil return check valve is located between fuel system oil return pipe joint hole and the high-pressure oil pump oil return hole.

Preferably, the installation position of the mechanism body is higher than the position of the oil return port of the high-pressure oil pump.

Compared with the prior art, the utility model has the following beneficial effects:

1. the oil return joint mechanism of the air-cooled diesel engine is simple in structure and simple in use method, except for the conventional oil return function, the oil return joint mechanism is upwards connected with the first inlet of the oil return joint body through the oil return outlet of the high-pressure oil pump, and at the moment, the oil return pipeline passes through a small section of upwards oil return pipeline, so that fuel in the pipeline cannot be completely discharged, air cannot flow back after the effect of thermal expansion and cold contraction, and a series of starting problems caused by air inlet of the low-pressure oil pipeline are avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present utility model;

FIG. 2 is a schematic perspective view of the structure of the present utility model;

FIG. 3 is a schematic bottom view of the structure of FIG. 2 of the present utility model;

FIG. 4 is a schematic diagram of the structure of the present utility model using wiring.

In the figure: 1. a body fixing hole; 2. oil return holes of the oil injector; 3. an oil return hole of the high-pressure oil pump; 4. an oil return check valve; 5. a fuel system return pipe joint hole; 6. a high-pressure oil pump return pipe; 7. an oil return pipe of the fuel system; 8. a mechanism body; 9. oil return pipe of oil sprayer.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides an oil return joint mechanism of an air-cooled diesel engine, which comprises a mechanism body 8, wherein a machine body fixing hole 1 is formed in the middle of one end of the mechanism body 8, the mechanism can be fixed on the engine body through the arrangement of the machine body fixing hole 1, an oil sprayer oil return hole 2 is formed in the top of one end, close to the machine body fixing hole 1, of an inner cavity of the mechanism body 8, an oil return hole 3 of a high-pressure oil pump is formed in the top of the other end of the inner cavity of the mechanism body 8, an oil return check valve 4 is arranged in the inner cavity of the mechanism body 8, and installation errors such as: the oil inlet and return pipe is reversely connected, and the special reasons cause reverse support of the engine and the like, so that return oil is reversed, the safety of the mechanism is improved, a fuel system oil return pipe joint hole 5 is arranged in the middle of the other end of the mechanism body 8, and an oil return check valve 4 is positioned between the fuel system oil return pipe joint hole 5 and the high-pressure oil pump oil return hole 3.

The mounting position of the mechanism body 8 is higher than the position of the oil return port of the high-pressure oil pump, and the mechanism is arranged in such a way that the mechanism can not completely empty fuel in a pipeline under the condition of having a conventional oil return function, and air can not flow back after the effect of thermal expansion and cold contraction, so that a series of starting problems caused by air inlet of a low-pressure oil way are avoided.

To sum up: when the oil return joint mechanism of the air-cooled diesel engine is used, an M16x1.5 bolt is used to penetrate through the engine body fixing hole 1 to be fixed on the engine body; the oil return pipe 9 of the oil sprayer is provided with an oil return joint and is arranged on the oil return hole 2 of the oil sprayer through a hollow bolt; the high-pressure oil pump oil return pipe 6 and the common rail pipe oil return pipe (if any) are arranged on the high-pressure oil pump oil return hole 3 through a hollow bolt; finally, the fuel system oil return pipe joint hole 5 is connected into the fuel system oil return pipe 7, and the installation position of the mechanism is higher than the position of the oil outlet of the high-pressure oil pump.

Standard parts used in the present utility model can be purchased from the market, the special-shaped parts can be customized according to the descriptions of the specification and the drawings, the specific connection modes of the parts are conventional means such as bolts, rivets, welding and the like which are mature in the prior art, and the machines, the parts and the equipment are conventional models in the prior art, so that details which are not described in detail in the specification belong to the prior art which is well known to the person skilled in the art, and although the embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an oil return joint mechanism of forced air cooling diesel engine, includes mechanism body (8), its characterized in that: the middle part of mechanism body (8) one end is equipped with organism fixed orifices (1), the top that the one end that mechanism body (8) inner chamber is close to organism fixed orifices (1) is equipped with sprayer oil return hole (2), the top of mechanism body (8) inner chamber other end is equipped with high-pressure oil pump oil return hole (3), be equipped with oil return check valve (4) in the inner chamber of mechanism body (8), the middle part of mechanism body (8) other end is equipped with fuel system oil return pipe joint hole (5).

2. The oil return joint mechanism of an air-cooled diesel engine according to claim 1, wherein: the installation position of the mechanism body (8) is higher than the position of the oil return port of the high-pressure oil pump.

3. The oil return joint mechanism of an air-cooled diesel engine according to claim 1, wherein: the oil return check valve (4) is positioned between the oil return pipe joint hole (5) of the fuel system and the oil return hole (3) of the high-pressure oil pump.