CN115506899A

CN115506899A - Gas supply valve for precombustion chamber of gas internal combustion engine

Info

Publication number: CN115506899A
Application number: CN202211290207.8A
Authority: CN
Inventors: 邹淑华; 王自飞
Original assignee: Taihu Power Technology Wuhan Co ltd
Current assignee: Taihu Power Technology Wuhan Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2022-12-23

Abstract

The invention discloses a novel gas supply valve for a pre-combustion chamber of a gas internal combustion engine, which comprises a valve body, wherein an air passage is arranged in the valve body, the valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected with a one-way valve through double-headed screws; go up the valve body upper end and connect outside air supply pipe, stud is connected to the lower extreme, the air flue intercommunication of through-hole and valve body has in the stud, the check valve is connected to the stud lower extreme, the check valve lateral wall is equipped with the side gas outlet, be equipped with reset spring in the cavity of check valve, the reset spring upper end is equipped with the valve block, the bottom contact and the airtight of valve block and stud, stud and check valve set up in the cavity of valve body down, lower valve body is still connected to the lower extreme of going up the valve body, the air inlet of internal-combustion engine precombustion chamber is connected to the lower extreme of lower valve body. Compared with a valve rod type air supply valve, the air supply valve is of a valve plate type, and has the advantages of low requirement on machining precision, low machining cost, long service life, high reaction speed and low maintenance cost.

Description

Gas supply valve for precombustion chamber of gas internal combustion engine

Technical Field

The invention belongs to the technical field of internal combustion engines, and particularly relates to a novel gas supply valve for a precombustion chamber of a gas internal combustion engine.

Background

An internal combustion engine is a power machine, and is a heat engine that directly converts heat energy released by burning fuel inside the machine into power. The internal combustion engine in a broad sense includes not only a reciprocating piston type internal combustion engine, a rotary piston type engine and a free piston type engine but also a gas turbine of a rotary vane type, a jet engine and the like, but the internal combustion engine is generally referred to as a piston type internal combustion engine. Piston internal combustion engines are the most common of the reciprocating piston types. The piston type internal combustion engine mixes fuel and air and burns in a cylinder of the engine, and the released heat energy enables the cylinder to generate high-temperature and high-pressure fuel gas. The gas expands to push the piston to do work, and then the mechanical work is output through a crank-link mechanism or other mechanisms to drive the driven machinery to work. Common diesel engines and gasoline engines convert internal energy into mechanical energy, and change the internal energy by doing work.

At present, the combustion organization mode of the gas internal combustion engine is increasingly adopting the ignition of the precombustion chamber, and the air intake control of the precombustion chamber also has various modes, including mechanical cam control, electromagnetic valve control and the like. Mechanical cam driven valve control: the structure is complicated, the control is extensive, and the accurate control can not be carried out along with the internal-combustion engine working condition. Controlling an electromagnetic valve: the ECU can realize accurate control, but the structure and the control system are complex, and the reliability of the electromagnetic valve is poor.

The most used precombustion chamber air supply valve in the market at present is a valve rod type, and is typically an air supply valve on a Yan Bahe Jenbacher J620 generating set, the Yan Bahe original factory accessory number is 433894, the valve rod type air supply valve is high in machining precision requirement, easy to generate carbon deposition to influence the reaction speed, generally needs to be replaced after about 1 year of use, and is high in use cost.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the novel gas supply valve for the pre-combustion chamber of the gas internal combustion engine, and the gas supply valve has the advantages of long service life, low requirement on processing precision, low processing cost and simple maintenance.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel gas supply valve for a pre-combustion chamber of a gas internal combustion engine comprises a valve body, wherein an air passage is arranged in the valve body, the valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected with a one-way valve through a double-headed screw;

go up the valve body upper end and connect outside air supply pipe, the lower extreme is connected the stud, have the through-hole in the stud with the air flue intercommunication of valve body, the stud lower extreme is connected the check valve, the check valve lateral wall is equipped with the side gas outlet, be equipped with reset spring in the cavity of check valve, the reset spring upper end is equipped with the valve block, the valve block with the bottom contact of stud and airtight, stud and check valve set up in the cavity of valve body down, the lower extreme of going up the valve body still connects lower valve body, the air inlet of internal-combustion engine precombustion chamber is connected to the lower extreme of valve body down.

In above technical scheme, it is equipped with external screw thread and internal thread to go up the valve body lower extreme, stud lateral wall upper end is equipped with the upper end external screw thread, the inner chamber upper end of valve body is equipped with the internal thread down, go up the external screw thread connection of valve body lower extreme the internal thread of valve body inner chamber upper end down, go up the internal thread connection of valve body lower extreme the upper end external screw thread of stud.

In above technical scheme, stud lateral wall lower extreme is equipped with the lower extreme external screw thread, the cavity that link up from top to bottom has in the check valve, the cavity with the air flue intercommunication of valve body, the cavity upper end of check valve is equipped with the internally mounted screw thread, the lower extreme external screw thread connection of stud the unidirectional internally mounted screw thread.

In the above technical scheme, a circle of steps is arranged at the bottom of the double-headed screw, a spring accommodating part is arranged in a cavity of the check valve, the spring accommodating part is internally provided with the return spring, the upper end of the return spring is provided with the valve block, and the valve block is in contact with and is hermetically sealed with the steps at the bottom of the double-headed screw.

In above technical scheme, be equipped with the installation department in the cavity of lower valve body, double-end screw and check valve wholly set up in the installation department of lower valve body, the lateral wall of check valve with the clearance has between the inside wall of the installation department of lower valve body.

In the above technical scheme, the upper valve body and the double-headed screw are of an integrated structure.

In the above technical solution, the upper end of the upper valve body is connected with the external air supply pipe through a thread.

In the above technical solution, the lower end of the lower valve body is connected with the air inlet of the pre-combustion chamber of the internal combustion engine through a thread.

The invention has the beneficial effects that: compared with a valve rod type air supply valve, the air supply valve is of a valve plate type, and has the advantages of low requirement on machining precision, low machining cost, long service life, high reaction speed and low maintenance cost.

Drawings

FIG. 1 is a schematic view of the gas supply valve of the present invention;

FIG. 2 is an exploded view of the gas supply valve of the present invention;

FIG. 3 is an exploded view of the gas supply valve of the present invention;

FIG. 4 is an exploded view showing the inner structure of the air supply valve according to the present invention;

FIG. 5 is a schematic view showing a check valve structure of the air supply valve of the present invention;

FIG. 6 is a schematic view of a double-headed screw structure of the air supply valve of the present invention;

FIG. 7 is an enlarged view of portion A of FIG. 4;

wherein, 1, an upper valve body; 2. a double-headed screw; 21. the upper end is threaded; 22. a spanner position; 23. lower end screw threads; 24. a step; 3. a valve plate; 4. a return spring; 5. a one-way valve; 51. internally mounting threads; 52. a side gas outlet; 53. a spring receiving portion; 6. a lower valve body; 61. a mounting portion.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific embodiments. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the present invention will only be defined by the appended claims.

As shown in fig. 1-7, the novel gas supply valve for the pre-combustion chamber of the gas internal combustion engine comprises a valve body, wherein an air passage is arranged in the valve body, the valve body is divided into an upper valve body 1 and a lower valve body 6, and the upper valve body 1 and the lower valve body 6 are connected through a double-headed screw 2 and a one-way valve 5. In addition, the upper valve body 1 and the stud screw 2 may be formed as an integral structure. Go up 1 upper end of valve body and be equipped with helicitic texture, through the outside air supply pipe of threaded connection, go up 1 lower extreme of valve body and be equipped with external screw thread and internal thread.

Have the through-hole in the double-end screw 2, the through-hole communicates with the air flue in the last valve body 1, and the lateral wall from the top down of double-end screw 2 is equipped with upper end external screw thread 21, spanner position 22, lower extreme external screw thread 23 and step 24 in proper order, and spanner position 22 makes things convenient for the dismantlement of air feed valve to overhaul.

A cavity which is communicated up and down is arranged in the one-way valve 5, and the cavity is communicated with the through hole of the double-headed screw 2 and the air passage in the upper valve body 1. The upper end of the cavity is provided with internal mounting threads 51, the side surface is provided with a side air outlet 52 penetrating through the side wall, the lower end is provided with a spring accommodating part 53, the spring accommodating part 53 is of a step type structure, and the spring is arranged on the step so as to limit the spring downwards. Wherein, the side air outlet 52 is provided with a plurality of, evenly set up on the lateral wall of check valve 5.

The upper end of the cavity of the lower valve body 6 is provided with an internal thread, the middle part of the cavity is provided with an installation part 61, the installation part 61 is of a step structure, and the double-headed screw 2 and the one-way valve 5 which are installed in the installation part are limited downwards.

The lower end of the lower valve body 6 is provided with a thread structure which is connected with an air inlet of the pre-combustion chamber of the internal combustion engine.

The internal thread at the lower end of the upper valve body 1 is connected with the upper external thread 21 of the double-headed screw 2, and the lower external thread 23 of the double-headed screw 2 is connected with the internal installation thread 51 of the check valve 5. A return spring 4 is arranged in a spring accommodating part 53 of the check valve 5, a valve plate 3 is arranged at the upper end of the return spring 4, and the valve plate 3 is in contact with and hermetically sealed with a step 24 at the bottom of the double-headed screw 2. The double-headed screw 2 and the check valve 5 are integrally provided in the mounting portion 61 of the lower valve body 6, a gap is provided between the outer side wall of the check valve 5 and the inner side wall of the mounting portion 61 of the lower valve body 6, the side gas outlet 52 of the check valve 5 communicates with the gap, and gas can flow into the gap from the cavity of the check valve 5 through the side gas outlet 52. The internal thread at the upper end of the lower valve body 6 is connected with the external thread at the lower end of the upper valve body 1.

Wherein, the return spring 4 can be a tower spring or a straight spring, and can also be replaced by an elastic sheet.

The gas supply valve of the present invention can be applied to a prechamber system having the patent application number 2012800642017 entitled "prechamber system for an internal combustion engine" and is provided on the gas introduction device in this patent.

Yan Bahe Jenbacher J620 generator set used original factory air supply valve with fitting number 433894, applicant found that the service life of the air supply valve is less than 1 year, carbon deposition is easily generated to affect reaction speed, and the air supply valve needs to be replaced after being scrapped, thereby increasing equipment maintenance cost. The service life of the air supply valve is greatly prolonged after the air supply valve is replaced by the air supply valve, and the reaction speed also reaches the standard. The air supply valve is of a valve plate type, the requirement on machining precision is low, the production cost is lower, the maintenance is simple, the valve plate is deformed after long service life, a new valve plate is replaced, the connection modes of the air supply valve are threaded connection, and replacement of accessories is simple.

The working process is as follows: when the pre-combustion chamber of the internal combustion engine needs to intake air when working, the internal combustion engine starts to exhaust air, the internal pressure of the pre-combustion chamber is reduced, the air pressure in an air supply pipeline connected with an air inlet of the upper valve body 1 is higher than the internal air pressure of the pre-combustion chamber of the internal combustion engine, the air in the air supply pipeline enters the upper end of the one-way valve 5 through an air passage in the upper valve body 1 and a through hole in the double-headed screw 2 to push the valve plate 3 to move downwards to compress the return spring 4, at the moment, the sealing state of the valve plate 3 and a step 24 at the bottom of the double-headed screw 2 is released, the air supply valve is opened, and the air enters the pre-combustion chamber through a side air outlet 52 of the one-way valve 5, a gap between the cavity of the one-way valve 5 and the cavity of the lower valve body 6 and an air passage of the lower valve body 6.

When the gas concentration in the precombustion chamber meets the requirement, the spark plug is ignited, the gas in the precombustion chamber explodes, the internal pressure of the precombustion chamber is suddenly increased, the gas pressure in the precombustion chamber is higher than the gas pressure in the gas supply pipeline, the gas in the precombustion chamber enters the cavity of the one-way valve 5 through the gas passage of the lower valve body 6 and the bottom hole of the cavity of the one-way valve 5 and pushes the valve plate 3 to move upwards, when the valve plate 3 is tightly attached to the surface of the step 24 at the bottom of the double-thread 2, the valve plate 3 and the surface of the step 24 at the bottom of the double-thread 2 form a gas seal, and the gas supply valve is closed.

Test experiments

And (3) testing a product: gas supply valve for precombustion chamber of gas IC engine

And (3) testing time: 29/7/2021/2022/10/1/2021

Test site: tianmen refuse landfill

Test equipment and tools: yan Bahe Jenbacher J620, a set of socket head wrenches, a monkey wrench, protective working clothes, and other disassembling tools.

And (3) testing process: stopping a generating set of the Yanbach Jenbacher J620, after the generating set is cooled, disassembling and assembling workers wear protective clothing, wear safety equipment, disassembling 8 original air supply valves on Yan Bahe, respectively installing 4 Yanbach original factory accessories 433894 gas internal combustion engine pre-combustion chamber air supply valves and 4 novel gas internal combustion engine pre-combustion chamber air supply valves according to the sequence, then respectively making marks on two groups of gas internal combustion engine pre-combustion chamber air supply valves 1-8, respectively marking original factory accessories 433894 gas internal combustion engine pre-combustion chamber air supply valves as #1, #2, #3 and #4, respectively marking the novel gas internal combustion engine pre-combustion chamber air supply valves as #5, #6, #7, #8, finally restoring Yan Bahe Jenbacher J620 other parts, once again checking Yan Bahe zero idle speed of the parts of the generating set installation work and whether various parameters of the Yanbach unit meet the normal operation or not, checking whether the generating set operates normally, and checking the generating set operates without errors after the operating normally for 15 minutes.

In the following operation process of the generator set, the service life of the air supply valve of the prechamber of the 8-branch gas internal combustion engine is recorded respectively, and the recording results are as follows:

and (4) test conclusion: the service life of the air supply valve of the precombustion chamber of the novel gas internal combustion engine is about 2/3 longer than that of the air supply valve of the precombustion chamber of the original factory accessory 433894.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. The utility model provides a novel gas internal-combustion engine precombustion chamber air feed valve, includes the valve body, be equipped with the air flue in the valve body, its characterized in that: the valve body is divided into an upper valve body (1) and a lower valve body (6), and the upper valve body (1) and the lower valve body (6) are connected with a one-way valve (5) through a double-headed screw (2);

go up valve body (1) upper end connection outside air supply pipe, the lower extreme is connected stud (2), have in stud (2) the through-hole with the air flue intercommunication of valve body, stud (2) lower extreme is connected check valve (5), check valve (5) lateral wall is equipped with side gas outlet (52), be equipped with reset spring (4) in the cavity of check valve (5), reset spring (4) upper end is equipped with valve block (3), valve block (3) with the bottom contact and the airtight of stud (2), stud (2) and check valve (5) set up in the cavity of lower valve body (6), the lower extreme of going up valve body (1) still connects lower valve body (6), the air inlet of combustion engine precombustion chamber is connected to the lower extreme of lower valve body (6).

2. A new gas engine pre-chamber gas supply valve as claimed in claim 1, wherein: go up valve body (1) lower extreme and be equipped with external screw thread and internal thread, stud (2) lateral wall upper end is equipped with upper end external screw thread (21), the inner chamber upper end of valve body (6) is equipped with the internal thread down, go up the external screw thread connection of valve body (1) lower extreme the internal thread of valve body (6) inner chamber upper end down, go up the internal thread connection of valve body (1) lower extreme the upper end external screw thread (21) of stud (2).

3. The new gas engine precombustion chamber air supply valve according to claim 1, characterized in that: double-end screw (2) lateral wall lower extreme is equipped with lower extreme external screw thread (23), the cavity that link up from top to bottom has in check valve (5), the cavity with the air flue intercommunication of valve body, the cavity upper end of check valve (5) is equipped with internally mounted screw thread (51), the lower extreme external screw thread (23) of double-end screw (2) are connected the internally mounted screw thread (51) of check valve (5).

4. The new gas engine precombustion chamber air supply valve according to claim 1, characterized in that: double-end screw (2) bottom is equipped with round step (24), be equipped with spring holding portion (53) in the cavity of check valve (5), be equipped with in spring holding portion (53) reset spring (4), reset spring (4) upper end is equipped with valve block (3), valve block (3) with step (24) contact and airtight of double-end screw (2) bottom.

5. A new gas engine pre-chamber gas supply valve as claimed in claim 1, wherein: be equipped with installation department (61) in the cavity of lower valve body (6), double-end screw (2) and check valve (5) whole set up in installation department (61) of lower valve body (6), the lateral wall of check valve (5) with the clearance has down between the inside wall of installation department (61) of valve body (6).

6. A new gas engine pre-chamber gas supply valve as claimed in claim 1, wherein: go up valve body (1) and double-end screw (2) formula structure as an organic whole.

7. A new gas engine pre-chamber gas supply valve as claimed in claim 1, wherein: the upper end of the upper valve body (1) is connected with the external air supply pipe through threads.

8. A new gas engine pre-chamber gas supply valve as claimed in claim 1, wherein: the lower end of the lower valve body (6) is connected with an air inlet of the pre-combustion chamber of the internal combustion engine through threads.