CN220505209U

CN220505209U - Diesel engine air inlet system, diesel engine and vehicle

Info

Publication number: CN220505209U
Application number: CN202320744280.1U
Authority: CN
Inventors: 张波; 屈传水; 黄以兵
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2024-02-20
Anticipated expiration: 2033-04-03

Abstract

The utility model relates to the technical field of engines, in particular to a diesel engine air inlet system, a diesel engine and a vehicle. A diesel engine air intake system comprising: the air conditioner comprises an air compressor and an intercooler, wherein a one-way conduction valve is arranged on a pipeline, communicated with the air compressor, of the intercooler, the one-way conduction valve comprises at least two air inlet pipes which are arranged in parallel, an inner channel of each air inlet pipe is of a Tesla structure, each air inlet pipe is provided with an air inlet and an air outlet, the air inlet of each air inlet pipe is communicated with the air compressor, and the air outlet of each air inlet pipe is communicated with the intercooler. The utility model solves the problems that the burning chamber high-temperature fuel gas is strung out of the external environment to cause the burning fault and the gas path is directly cut off to limit the application range of the diesel engine.

Description

Diesel engine air inlet system, diesel engine and vehicle

Technical Field

The utility model relates to the technical field of engines, in particular to a diesel engine air inlet system, a diesel engine and a vehicle.

Background

The diesel engine can not work under the external environment condition containing combustible and explosive gas, so that the external environment of the diesel engine has a plurality of factors of the combustible and explosive gas, wherein one of the factors is that when the diesel engine is accidentally air-in and tempered, high-temperature fuel gas is strung out from a combustion chamber and flows to the air filtering direction of a supercharger through an air inlet cavity, so that the combustible and explosive gas is generated in the external environment of the diesel engine.

In the prior art, a stop valve is arranged on an air inlet pipeline of a diesel engine, when the combustible and explosive gas in the external environment of the diesel engine is detected to exceed the standard, the stop valve arranged on the air inlet pipeline is cut off to further cut off the air path, the diesel engine stops working immediately, the use range of the diesel engine is greatly limited, and the severe fault can be possibly caused if the environment state cannot be effectively identified.

Disclosure of Invention

Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide a diesel engine air inlet system so as to solve the problems that the burning chamber high-temperature fuel gas is strung out of the external environment to cause the burning fault and the gas path is directly cut off to limit the use range of the diesel engine.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

a diesel engine air intake system comprising: the air conditioner comprises an air compressor and an intercooler, wherein a one-way conduction valve is arranged on a pipeline, communicated with the air compressor, of the intercooler, the one-way conduction valve comprises at least two air inlet pipes which are arranged in parallel, an inner channel of each air inlet pipe is of a Tesla structure, each air inlet pipe is provided with an air inlet and an air outlet, the air inlet of each air inlet pipe is communicated with the air compressor, and the air outlet of each air inlet pipe is communicated with the intercooler.

Preferably, the tesla structure comprises a plurality of conducting units, and the conducting units are sequentially communicated.

Preferably, each of the conducting units comprises an air inlet section and a cut-off section, the cut-off section comprises an arc section and a straight pipe section, a first end of the arc section is communicated with the air inlet section, a second end of the arc section is communicated with the first end of the straight pipe section, and a second end of the straight pipe section is communicated with the air inlet section.

Preferably, the straight pipe section and the air inlet section are arranged at an acute angle.

Preferably, the one-way conduction valve is of an integrated structure.

Preferably, the one-way conduction valve is of an integrally cast structure.

Preferably, the air filter is further included, and the air filter is communicated with an air inlet of the compressor.

Preferably, the engine further comprises a combustion chamber, and an exhaust port of the intercooler is communicated with the combustion chamber.

The utility model also provides a diesel engine, comprising the diesel engine air inlet system.

The utility model also provides a vehicle comprising a diesel engine as described above.

One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:

1. the utility model sets the one-way-conduction Tesla valve structure in front of the rear intercooler of the diesel engine compressor, when the accidental air intake is tempered, the high-temperature fuel gas flows out from the combustion chamber in series and flows to the air filtering direction of the supercharger through the air intake cavity. When the high-temperature gas flows through the one-way conduction valve, the flow is in reverse circulation, and the air flow in the backflow collides to generate a non-return effect, so that the flow is cut off, the high-temperature gas is blocked from overflowing from the air filter of the supercharger due to tempering, the problem that the burning chamber high-temperature gas is struggled out of the external environment to cause the strong fault is solved, the gas path is not required to be cut off, and the application range of the diesel engine is enlarged.

2. The one-way conduction valve adopts a plurality of exhaust pipes which are arranged in parallel, namely, the exhaust pipes are connected in parallel. A plurality of conduction units are connected in series in each exhaust pipe, so that the unidirectional conduction efficiency is improved, and the unidirectional conduction effect is ensured; meanwhile, the plurality of exhaust pipes are arranged in parallel, so that the gas flow velocity in a single exhaust pipe is reduced, the forward conduction resistance is reduced, and the power density is improved.

Additional aspects of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of a diesel engine air intake system provided by an embodiment of the present utility model;

FIG. 2 is a schematic view of a single air inlet pipe provided by an embodiment of the present utility model;

FIG. 3 is a schematic diagram of forward conduction of an air inlet pipe according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of reverse cut-off of an air inlet pipe according to an embodiment of the present utility model;

in the figure: 1. a compressor; 2. an intercooler; 3. an air filter; 4. a one-way conduction valve; 41. an air inlet; 42. an air inlet section; 43. a circular arc section; 44. a straight pipe section; 45. an exhaust port; 5. a combustion chamber;

the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the utility model clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The terms "mounted," "connected," "secured," and the like in the present utility model are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the terms "mechanically coupled" and "directly coupled" may be used interchangeably to refer to either a mechanical coupling, an indirect coupling via an intermediary, an internal coupling of two elements, or an interaction of two elements, as would be understood by one of ordinary skill in the art, and the terms are to be understood in the specific sense of the present utility model as appropriate. The terms "first," "second," and the like of the present utility model are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.

Term interpretation section:

tesla valve: the earliest proposal of Nigla Tesla is a unidirectional conduction structure.

Unidirectional conductivity: a characteristic of making the fluid flow in only one direction or having small forward flow resistance and large reverse flow resistance.

And (3) a gas compressor: and a part for applying work to the air by using the blades rotating at high speed to increase the air pressure in the gas engine.

An intercooler: the temperature of the high-temperature air after supercharging is reduced, so that the heat load of the engine is reduced, the air inflow is improved, and the power of the engine is further increased. For supercharged engines, the charge air cooler is an important component of the supercharging system. Whether it is a turbocharged engine or a supercharged engine, an intercooler needs to be installed between the supercharger and the intake manifold.

Power density: the specific power is a comprehensive index for measuring the dynamic performance of the automobile, and specifically refers to the ratio of the maximum power of an automobile engine to the total mass of the automobile.

As mentioned in the background, diesel engines cannot operate directly in a flammable gas environment. Many factors exist in the environment of a diesel engine, for example, the diesel engine works near a coal mine, and the environment in which the diesel engine is located itself has combustible and explosive gases. The self structure of the diesel engine also causes the problems, when the diesel engine is accidentally air-in and tempered, high-temperature fuel gas flows out from the combustion chamber in series and flows to the air filtering direction of the supercharger through the air inlet cavity, so that combustible and explosive gas is generated in the external environment of the diesel engine.

In view of the above problems, diesel engines are equipped with a self-safety system, i.e., a shut-off valve is provided on the air intake pipe of the diesel engine. The accidental or continuous exceeding of combustible gas in the external environment can trigger the self-security system of the diesel engine to stop the diesel engine, so that the application range of the diesel engine is greatly restricted, and if the security system cannot effectively identify the environment state, the severe fault can be possibly caused.

The utility model aims to solve the problem of the factor of backfire of air inlet of a diesel engine, and provides an air inlet system with unidirectional conduction aiming at the dimension of backfire detonation environment of the air inlet, which conducts the air inlet and simultaneously cuts off reverse high-speed air flow, so as to avoid high-temperature fuel gas in a combustion chamber from being strung out of the external environment. The diesel engine can work under the 'severe' condition or the gas engine can directly breathe in and burn in the high-concentration combustible gas environment by combining with other dimensional solutions, and a new mode of gas engine operation is developed.

As shown in fig. 1, in one embodiment of the present utility model, a diesel engine air intake system is provided, including: the air compressor 1 and the intercooler 2, be provided with one-way conduction valve 4 on the pipeline that air compressor 1 with intercooler 2 is linked together, one-way conduction valve 4 includes two at least intake pipes that set up side by side, the internal passage of intake pipe is tesla structure, and the intake pipe has air inlet 41 and gas vent 45, every air inlet 41 of intake pipe communicates air compressor 1, every gas vent 45 of intake pipe communicates intercooler 2.

As shown in fig. 1, the diesel engine air intake system further comprises an air filter 3 and a combustion chamber 5, wherein the air filter 3 is communicated with the air inlet of the compressor 1, and the air outlet of the intercooler 2 is communicated with the combustion chamber 5. The gas enters the system through the air filter 3, the gas is cleaned through the air filter 3, the cleaned gas enters the gas compressor 1, the gas pressure is increased through the gas compressor 1, the pressurized gas enters the intercooler 2 through the one-way conduction valve 4, the temperature of the pressurized high-temperature gas is reduced through the intercooler 2, and finally the pressurized high-temperature gas enters the combustion chamber 5.

The utility model sets the one-way-conduction Tesla valve structure in front of the intercooler 2 behind the diesel engine compressor 1, when the accidental air intake is tempered, the high-temperature fuel gas flows out from the combustion chamber 5 in series and flows to the air filtering direction of the supercharger through the air intake cavity. When the high-temperature gas flows through the one-way conduction valve 4, the flow is in reverse circulation, and the air flow in the backflow collides to generate a non-return effect (shown in fig. 3 and 4), so that the flow is stopped, the high-temperature gas is blocked from overflowing from the air filter of the supercharger due to tempering, the problem that the burning chamber is in high-temperature gas to be in series with the external environment to cause the burning fault is solved, the gas path is not required to be cut off, and the application range of the diesel engine is enlarged. And no movable part exists in the Tesla valve, and the operation is reliable.

In addition, even a trace amount of knocking in the intake chamber is insufficient to cause a strong failure of a large environmental explosion. If the air inlet cavity has a large amount of deflagration, the explosion-proof valve structure arranged in the air inlet cavity can effectively reduce the pressure of deflagration gas.

As shown in fig. 2, the tesla structure includes a plurality of conducting units, where the conducting units are serially connected, and the conducting units are sequentially connected, that is, the outlet of the previous conducting unit is connected to the inlet of the next conducting unit. The reverse blocking effect is enhanced by the series connection of a plurality of pass cells.

In research and development, the applicant finds that although the reverse blocking effect is improved by connecting a plurality of conducting units in series in each air inlet pipe, the simple series combination also causes superposition of fluid delay layer loss, one-way conduction of the tesla structure is generated by collision of air flows in backflow, so that the one-way conduction is realized, but the one-way conduction is also blocked to the forward conduction, and the blocking is aggravated when the air flow rate of each air inlet pipe is larger due to the thinner pipe diameter of the conducting units, so that the fluid pressure is reduced when the air flow rate is higher, and when the air inlet pipe is applied to an air inlet system of a diesel engine, the large air inlet pressure loss is unfavorable for improving the power density.

In view of this, the one-way conduction valve 4 of the present utility model employs a plurality of exhaust pipes arranged in parallel, that is, a plurality of exhaust pipes are connected in parallel as shown in fig. 1. A plurality of conduction units are connected in series in each exhaust pipe, so that the unidirectional conduction efficiency is improved, and the unidirectional conduction effect is ensured; meanwhile, the plurality of exhaust pipes are arranged in parallel, so that the gas flow velocity in a single exhaust pipe is reduced, the forward conduction resistance is reduced, and the power density is improved. The practicality of this structure is promoted in parallelly connected combination arrangement of multi-unit structure, and the fluid flow satisfies the design demand.

As shown in fig. 2, each of the conducting units includes an air inlet section 42 and a cut-off section, the cut-off section includes an arc section 43 and a straight pipe section 44, a first end of the arc section 43 is communicated with the air inlet section 42, a second end of the arc section 43 is communicated with a first end of the straight pipe section 44, a second end of the straight pipe section 44 is communicated with the air inlet section 42, and the straight pipe section 44 and the air inlet section 42 are arranged at an acute angle.

The one-way conduction valve 4 is of an integrated structure. Specifically, it may be an integrally cast structure. The one-way conduction of the air inlet flow is realized by using the integrated casting structure without other mechanical parts, so that the product can be kept to have higher reliability and stability.

Based on the above air intake system, the embodiment of the utility model also provides a diesel engine and a vehicle, in which the air intake system described in the above embodiment is provided.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims

1. A diesel engine air intake system, comprising: the device comprises an air compressor and an intercooler, wherein a one-way conduction valve is arranged on a pipeline, communicated with the air compressor and the intercooler, of the pipeline, the one-way conduction valve comprises at least two air inlet pipes which are arranged in parallel, an internal channel of each air inlet pipe is of a Tesla structure, each air inlet pipe is provided with an air inlet and an air outlet, the air inlet of each air inlet pipe is communicated with the air compressor, and the air outlet of each air inlet pipe is communicated with the intercooler;

the tesla structure comprises a plurality of conducting units, and the conducting units are sequentially communicated; each conducting unit comprises an air inlet section and a cut-off section, the cut-off section comprises an arc section and a straight pipe section, the first end of the arc section is communicated with the air inlet section, the second end of the arc section is communicated with the first end of the straight pipe section, and the second end of the straight pipe section is communicated with the air inlet section.

2. The diesel engine air intake system of claim 1, wherein said straight tube section is disposed at an acute angle to said air intake section.

3. The diesel engine air intake system of claim 1, wherein the one-way conduction valve is of unitary construction.

4. A diesel engine air intake system as set forth in claim 3 wherein said one-way conduction valve is of integrally cast construction.

5. The diesel air intake system of claim 1 further comprising an air filter in communication with the air inlet of the compressor.

6. The diesel air intake system of claim 1, further comprising a combustion chamber, wherein an exhaust port of the intercooler communicates with the combustion chamber.

7. A diesel engine comprising a diesel engine air intake system as claimed in any one of claims 1 to 6.

8. A vehicle comprising the diesel engine of claim 7.