A new precombustion chamber

Abstract

The utility model discloses a novel precombustion chamber belongs to engine technical field, solved the problem that existing precombustion chamber check valve is easy to fail. The precombustion chamber includes precombustion chamber body and with the lower end of precombustion chamber body connection's precombustion chamber nozzle, precombustion chamber nozzle inside be provided with precombustion chamber, precombustion chamber body top side be equipped with check valve mounting hole, check valve mounting hole inside be equipped with check valve, check valve one side top be equipped with air inlet section, check valve other side bottom be equipped with air outlet section, air inlet section, air outlet section with check valve mounting hole inner wall between respectively be equipped with air inlet flat channel and air outlet flat channel, check valve inside be equipped with connecting hole, connecting hole bottom be equipped with air inlet hole, air inlet hole diameter is less than connecting hole, air inlet hole top be equipped with first sealing ball. The utility model discloses a novel precombustion chamber can effectively improve the leakproofness to avoid precombustion chamber gas backflow, improve gas engine performance.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a novel pre-combustion chamber. Background Technology

[0002] With the implementation of the national energy structure adjustment and the national energy conservation and emission reduction strategy, the development of high-efficiency, high-power gas engines using natural gas, biogas, landfill gas, associated gas from oil fields, and wood gas as alternative fuels has received strong support from national and local policies, and there is strong market demand.

[0003] Existing high-power gas engines generally employ a pre-combustion chamber ignition method. The one-way valve's function is to supply a suitable amount of gas to the engine's pre-combustion chamber when open, and to prevent the flame from propagating into the pre-combustion pipeline when closed. If the one-way valve fails, it may cause backflow of gases produced during combustion within the pre-combustion chamber, leading to a malfunction. A search revealed that CN105318047A, a patent application for a one-way valve, gas engine pre-combustion chamber, and gas engine, describes a one-way valve comprising a valve body, a valve seat, and a steel ball. The steel ball is positioned between the lower end of the valve body and the valve seat. The valve seat includes a steel ball support portion with a through hole and an airflow guide portion with an airflow channel. The through hole is connected to the airflow channel, and the longitudinal axis of the through hole forms an angle with the longitudinal axis of the airflow channel. When the gas engine is in the intake stroke, the gas pressure is greater than the cylinder pressure, and the steel ball... At the bottom, the one-way valve is open. When the engine is in the compression, combustion, and exhaust strokes, the cylinder pressure is greater than the gas intake pressure, the steel ball is at the top, and the one-way valve is closed. Although the disclosed solution can improve the service life of the one-way valve to a certain extent, pits will still appear in the sealing part after long-term use, and the problem of the steel ball not sealing properly at the top is still not solved. In addition, when the gas pressure in the pre-combustion chamber is not very high, the steel ball cannot be completely lifted and squeezed into the sealing part. At this time, gas leakage and backflow will occur. Backflow will lead to insufficient pressure in the pre-combustion chamber and a decrease in internal combustion energy. This will significantly reduce the speed, temperature, and turbulence intensity of the ejected flame jet, making it impossible to effectively ignite the main combustion chamber. The pre-combustion chamber ignition fails, and the lean mixture in the main combustion chamber cannot be reliably ignited, resulting in misfire or increased combustion cycle variation, thereby affecting the engine performance. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a new type of pre-combustion chamber that addresses the above-mentioned shortcomings of the prior art. This new type of pre-combustion chamber can effectively improve the sealing performance, thereby preventing backflow of gas in the pre-combustion chamber and improving the performance of the gas engine. It has the characteristics of wide applicability and strong practicality.

[0005] The technical solution adopted by this utility model is as follows: a novel pre-combustion chamber, including a pre-combustion chamber body and a pre-combustion chamber nozzle connected to the lower end of the pre-combustion chamber body. A pre-combustion chamber cavity is provided inside the pre-combustion chamber nozzle. A one-way valve mounting hole is provided on one side of the upper part of the pre-combustion chamber body. A one-way valve is provided in the one-way valve mounting hole. An air inlet section is provided above one side of the one-way valve, and an air outlet section is provided below the other side of the one-way valve. An air inlet channel and an air outlet channel are respectively provided between the air inlet section, the air outlet channel and the inner wall of the one-way valve mounting hole. A connecting hole is provided inside the one-way valve. An air inlet hole is provided below the connecting hole. The diameter of the air inlet hole is smaller than that of the connecting hole. A first sealing ball is provided at the top of the air inlet hole. The air inlet channel communicates with the air inlet hole. One end of the air outlet channel communicates with the connecting hole, and the other end communicates with the pre-combustion chamber.

[0006] As a further improvement, the one-way valve includes a valve body and a valve core. The valve body is installed in the one-way valve mounting hole, and a threaded hole communicating with the connection hole is opened at the bottom of the valve body. The valve core is threadedly connected to the threaded hole, and the air inlet is opened at the top of the valve core.

[0007] Furthermore, the valve body is provided with a first air hole and a second air hole, the valve core is provided with a third air hole, the air inlet and the air inlet channel are connected through the second air hole and the third air hole, and the air outlet channel and the connecting hole are connected through the first air hole.

[0008] Furthermore, the one-way valve has an air intake channel at its top, which is connected to the upper end of the air intake channel.

[0009] Furthermore, a spark plug mounting hole is provided on the other side above the pre-combustion chamber.

[0010] Furthermore, the pre-combustion chamber body is provided with a first channel for connecting the pre-combustion chamber and the gas outlet channel.

[0011] Furthermore, the first sealing ball is a steel ball, the diameter of the first sealing ball is larger than that of the air inlet, and the diameter of the first sealing ball is smaller than that of the connecting hole.

[0012] Furthermore, the valve core at the top of the air inlet is provided with a spherical surface, the first sealing ball is arranged on the spherical surface, the air inlet is provided with a step that is wider at the top and narrower at the bottom, and a second sealing ball is movably arranged on the step.

[0013] Furthermore, a plurality of injection channels are provided below the nozzle of the pre-combustion chamber, which are evenly distributed along the circumference of the nozzle, and the injection channels are connected to the pre-combustion chamber.

[0014] Furthermore, the upper end of the valve body is provided with multiple annular grooves, and sealing rings are provided on the annular grooves.

[0015] Beneficial effects

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This utility model discloses a novel pre-combustion chamber. Through a novel one-way valve structure, it employs a bottom-inlet and top-outlet airflow method, effectively utilizing the weight of the first sealing ball to achieve a seal, preventing gas from the pre-combustion chamber from backflowing into the intake pipe, thus effectively improving engine performance. During operation, the combustion gas enters through the intake passage, travels along the intake channel, passes through the second and third air holes, and enters the intake port. When the pressure is sufficient, it pushes open the first and second sealing balls, allowing the gas to enter the connection hole of the one-way valve and then flow along the outlet channel into the pre-combustion chamber. The gas then contacts the spark plug in the pre-combustion chamber to produce... The flame is generated and enters the cylinder through the pre-combustion chamber nozzle to ignite the combustion gas. When the gas backflows, the gas pressure and the weight of the ball itself cause it to fall downwards above the first sealing ball, thus achieving a sealing effect. Compared with existing technologies, no matter how much backflow gas pressure there is, under the influence of the ball's own weight, there will be no leakage from the first and second sealing balls, effectively improving the sealing performance, ensuring the gas pressure in the pre-combustion chamber, achieving efficient ignition, and improving engine performance. Furthermore, this structure has a small external size due to the setting of the flat channel, which is conducive to installation and layout, and has the characteristics of being easy to use and having a wide range of applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is an enlarged schematic diagram of the one-way valve in this utility model;

[0020] Figure 3 This is an enlarged schematic diagram of the cross-sectional structure of the one-way valve in this utility model.

[0021] Wherein: 1-Pre-combustion chamber body, 2-One-way valve, 3-Pre-combustion chamber nozzle, 4-One-way valve mounting hole, 5-Pre-combustion chamber, 6-Inlet section, 7-Outlet section, 8-Inlet channel, 9-Outlet channel, 10-Connecting hole, 11-Inlet hole, 12-First sealing ball, 13-Third air hole, 14-Second air hole, 15-First air hole, 16-Inlet channel, 17-Annular groove, 18-Sealing ring, 19-Spark plug mounting hole, 20-First channel, 21-Valve body, 22-Valve core, 23-Injection channel, 24-Threaded hole, 25-Second sealing ball. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0023] See Figure 1-3As shown, a novel pre-combustion chamber of this utility model includes a pre-combustion chamber body 1 and a pre-combustion chamber nozzle 3 connected to the lower end of the pre-combustion chamber body 1. A pre-combustion chamber cavity 5 is provided inside the pre-combustion chamber nozzle 3. A one-way valve mounting hole 4 is provided on one side of the upper part of the pre-combustion chamber body 1, and a one-way valve 2 is provided inside the one-way valve mounting hole 4. The one-way valve 2 is characterized by having an air inlet section 6 above one side and an air outlet section 7 below the other side. Air inlet channels 8 are respectively provided between the air inlet section 6, the air outlet section 7, and the inner wall of the one-way valve mounting hole 4. The gas outlet channel 9 and the one-way valve 2 are equipped with a connecting hole 10. Below the connecting hole 10 is an air inlet 11, the diameter of which is smaller than that of the connecting hole 10. A first sealing ball 12 is located at the top of the air inlet 11. The air inlet channel 8 communicates with the air inlet 11. One end of the gas outlet channel 9 communicates with the connecting hole 10, and the other end communicates with the pre-combustion chamber 5. By setting up a novel one-way valve structure, and adopting a bottom-entry and top-exit method, when the gas in the pre-combustion chamber backflows, the weight of the first sealing ball is effectively used to achieve sealing. To prevent gas from backflowing into the intake manifold in the pre-combustion chamber 5, effectively improving engine performance, during operation, the combustion gas enters through the intake passage 16, travels along the intake channel 8 through the second and third air holes 14 and into the intake port 11. When the pressure is high enough, it pushes open the first sealing ball 12 and the second sealing ball 25, allowing the gas to enter the connection hole 10 of the one-way valve 2 and then enter the pre-combustion chamber 5 along the outlet channel 9. The gas then contacts the spark plug in the pre-combustion chamber 5 to generate a flame, which enters the cylinder through the pre-combustion chamber nozzle 3 to ignite the combustion gas. When gas backflows, the gas pressure and the ball's own weight cause it to sink, thus achieving a sealing effect. Compared to existing technologies, regardless of the backflow gas pressure, the ball's own weight prevents leakage from the first sealing ball 12 and the second sealing ball 25, effectively improving sealing performance, ensuring the gas pressure in the pre-combustion chamber 5, achieving efficient ignition, and improving engine performance. Furthermore, this structure, with its channel design, has a smaller overall size, facilitating installation and layout.

[0024] Specifically, the one-way valve 2 includes a valve body 21 and a valve core 22. The valve body 21 is installed in the one-way valve mounting hole 4. A threaded hole 24 communicating with the connecting hole 10 is opened at the bottom of the valve body 21. The valve core 22 is threadedly connected to the threaded hole 24. The air inlet hole 11 is opened on the top of the valve core 22. The threaded connection facilitates the installation of the first sealing ball 12 and the valve core 22, and also facilitates disassembly and maintenance in the future.

[0025] Preferably, the valve body 21 is provided with a first air hole 15 and a second air hole 14, and the valve core 22 is provided with a third air hole 13. The air inlet 11 and the air inlet channel 8 are connected through the second air hole 14 and the third air hole 13, and the air outlet channel 9 is connected to the connecting hole 10 through the first air hole 15. By arranging the opening positions of the first air hole 15 and the second air hole 14, air can be introduced from the bottom of the first sealing ball 12 and the second sealing ball 25 and exited from the top. When the gas backflows, the gravity of the ball is used to achieve effective sealing.

[0026] Furthermore, the one-way valve 2 has an air inlet channel 16 at the top, which is connected to the upper end of the air inlet channel 8. The top air inlet facilitates the installation and arrangement of the upper connecting pipe.

[0027] Furthermore, a spark plug mounting hole 19 is provided on the other side above the pre-combustion chamber 1 for installing a spark plug, so that the spark plug can be stably installed on the pre-combustion chamber 1.

[0028] Furthermore, a first channel 20 is provided on the pre-combustion chamber body 1 for connecting the pre-combustion chamber 5 and the gas outlet flat channel 9. By connecting the first channel 20 and the gas outlet flat channel 9, the gas can be ignited in the pre-combustion chamber 5.

[0029] Furthermore, the first sealing ball 12 is a steel ball, and the diameter of the first sealing ball 12 is larger than that of the air inlet 11, ensuring that the valve core 2 can smoothly support the first sealing ball 12 and realize air intake through the air inlet 11. The diameter of the first sealing ball 12 is smaller than that of the connecting hole 10, ensuring that the first sealing ball 12 can smoothly move up and down in the connecting hole 10.

[0030] Furthermore, the valve core 22 at the top of the air inlet 11 is provided with a spherical surface, and the first sealing ball 12 is arranged on the spherical surface. The air inlet 11 is provided with a step that is wider at the top and narrower at the bottom. A second sealing ball 25 is movably arranged on the step. The top surface of the step is also a spherical surface. The spherical surface and the first sealing ball 12 can fit better, effectively improving the sealing performance. The double sealing of the first sealing ball 12 and the second sealing ball 25 effectively improves the sealing performance and prevents gas backflow.

[0031] Furthermore, multiple injection channels 23 are evenly distributed around the nozzle circumference below the pre-combustion chamber nozzle 3. The injection channels 23 are connected to the pre-combustion chamber 5. The flame burning in the pre-combustion chamber 5 is injected into the main combustion chamber of the engine through the injection channels 23 of the pre-combustion chamber nozzle 3. The high-energy flame instantly ignites the lean mixture in the main combustion chamber of the engine, achieving lean combustion.

[0032] Furthermore, the upper end of the valve body 21 is provided with multiple annular grooves 17, and sealing rings 18 are provided on the annular grooves 17. The sealing rings 18 are O-rings to prevent the one-way valve 2 from loosening and to improve the reliability of the one-way valve 2 installation.

[0033] In this embodiment, a novel pre-combustion chamber is used such that the gas enters through the intake channel 16, passes through the second air hole 14 and the third air hole 13 along the intake channel 8, and enters the intake hole 11. When the pressure is high enough, it pushes open the first sealing ball 12 and the second sealing ball 25, allowing the gas to enter the connection hole 10 of the one-way valve 2 and enter the pre-combustion chamber 5 along the outlet channel 9. In the pre-combustion chamber 5, the gas comes into contact with the spark plug to generate a flame, which enters the cylinder through the pre-combustion chamber nozzle 3 to ignite the gas. When the gas backflows, the gas pressure and the ball's own weight cause it to move downwards above the first sealing ball 12, thus achieving a sealing effect. Compared with the prior art, no matter how much backflow gas pressure there is, under the influence of the ball's own weight, there will be no leakage from the first sealing ball 12 and the second sealing ball 25, effectively improving the sealing performance, ensuring the gas pressure in the pre-combustion chamber 5, achieving efficient ignition, and improving engine performance. Furthermore, this structure, by setting the channel, has a smaller overall size, which is conducive to installation and layout. This invention provides a novel pre-combustion chamber that effectively improves sealing, thereby preventing backflow of gas in the pre-combustion chamber and improving the performance of gas engines. It is characterized by its wide applicability and strong practicality.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A novel pre-combustion chamber, comprising a pre-combustion chamber body (1) and a pre-combustion chamber nozzle (3) connected to the lower end of the pre-combustion chamber body (1), wherein a pre-combustion chamber cavity (5) is provided inside the pre-combustion chamber nozzle (3), and a one-way valve mounting hole (4) is provided on one side of the upper part of the pre-combustion chamber body (1), wherein a one-way valve (2) is provided inside the one-way valve mounting hole (4), characterized in that, The one-way valve (2) has an air inlet section (6) on one side above and an air outlet section (7) on the other side below. The air inlet section (6), the air outlet section (7) and the inner wall of the one-way valve mounting hole (4) are respectively provided with an air inlet channel (8) and an air outlet channel (9). The one-way valve (2) has a connecting hole (10) inside. The connecting hole (10) has an air inlet hole (11) below it. The diameter of the air inlet hole (11) is smaller than that of the connecting hole (10). The top of the air inlet hole (11) is provided with a first sealing ball (12). The air inlet channel (8) is connected to the air inlet hole (11). One end of the air outlet channel (9) is connected to the connecting hole (10) and the other end is connected to the pre-combustion chamber (5).

2. The novel pre-combustion chamber according to claim 1, characterized in that, The one-way valve (2) includes a valve body (21) and a valve core (22). The valve body (21) is installed in the one-way valve mounting hole (4). A threaded hole (24) communicating with the connecting hole (10) is provided below the valve body (21). The valve core (22) is threadedly connected to the threaded hole (24). The air inlet (11) is opened on the top of the valve core (22).

3. The novel pre-combustion chamber according to claim 1, characterized in that, The valve body (21) is provided with a first air hole (15) and a second air hole (14), the valve core (22) is provided with a third air hole (13), the air inlet (11) and the air inlet channel (8) are connected through the second air hole (14) and the third air hole (13), and the air outlet channel (9) and the connecting hole (10) are connected through the first air hole (15).

4. The novel pre-combustion chamber according to claim 1, characterized in that, The one-way valve (2) has an air intake channel (16) at the top, and the air intake channel (16) is connected to the upper end of the air intake channel (8).

5. A novel pre-chamber as claimed in claim 1, wherein, A spark plug mounting hole (19) is provided on the other side above the pre-combustion chamber body (1).

6. A novel pre-chamber as claimed in claim 1, wherein, The pre-combustion chamber body (1) is provided with a first channel (20) for connecting the pre-combustion chamber (5) and the gas outlet flat channel (9).

7. A novel pre-combustion chamber according to claim 1, characterized in that, The first sealing ball (12) is a steel ball, the diameter of the first sealing ball (12) is larger than that of the air inlet (11), and the diameter of the first sealing ball (12) is smaller than that of the connecting hole (10).

8. A novel pre-chamber as claimed in claim 2, wherein, The valve core (22) at the top of the air inlet (11) is provided with a spherical surface, the first sealing ball (12) is arranged on the spherical surface, the air inlet (11) is provided with a step that is wider at the top and narrower at the bottom, and a second sealing ball (25) is movably arranged on the step.

9. A novel pre-chamber as claimed in claim 1, wherein, The pre-combustion chamber nozzle (3) is provided with multiple injection channels (23) evenly distributed along the circumference of the nozzle below it, and the injection channels (23) are connected to the pre-combustion chamber (5).

10. A novel pre-combustion chamber according to claim 2, characterized in that, The valve body (21) has multiple annular grooves (17) at its upper end, and a sealing ring (18) is provided on the annular grooves (17).

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