CN216741771U - Gas mixer for engine - Google Patents
Gas mixer for engine Download PDFInfo
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- CN216741771U CN216741771U CN202220337365.3U CN202220337365U CN216741771U CN 216741771 U CN216741771 U CN 216741771U CN 202220337365 U CN202220337365 U CN 202220337365U CN 216741771 U CN216741771 U CN 216741771U
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Abstract
The utility model discloses a gas mixer for an engine, which is provided with a body, a choke plate and a throttle plate, wherein an air inlet channel and a gas inlet channel I are arranged in the body, the choke plate and the throttle plate are arranged in the body, the air outlet end of the gas inlet channel I is communicated with the air inlet channel, the choke plate, the air outlet end of the gas inlet channel I and the throttle plate are arranged one by one in the conveying direction of the air inlet channel, a gas inlet channel II is also arranged in the body, the air outlet end of the gas inlet channel II is communicated with the air inlet channel, and the air outlet ends of the throttle plate and the gas inlet channel II are arranged one by one in the conveying direction of the air inlet channel. The position of the output end of the channel for delivering the fuel gas in the idling state on the mixer is optimized, and the delivery performance of the channel for delivering the fuel gas becomes smooth and stable, thereby maintaining the stability of the engine in the idling operation.
Description
Technical Field
The utility model relates to a gas mixer for an engine.
Background
Engines fueled by combustible gases such as methane, propane, butane, etc. have a specific air supply line that basically includes a pipe for delivering the gas, a pipe for delivering air, and a mixer. The pipeline for conveying gas and the pipeline for conveying air are connected with the mixer, and the mixer is connected with the engine. Therefore, an engine using gas requires two gases, one being combustible gas and the other being air. The two paths of gas are mixed by a mixer to form mixed gas with a certain proportion and finally enter an engine. The pipeline for conveying the fuel gas on the mixer has two paths, one path plays a main role in controlling the starting performance and the idling stability of the engine when the engine runs at an idle speed, and the other path plays a main role in controlling the high-speed stability and the rated power of the engine when the engine runs at a high speed. In the prior art, although a pipeline serving an engine in an idle state is communicated with a pipeline for conveying air, the connecting part of the pipeline for conveying air and the pipeline for conveying air is in a region where a negative pressure condition is not easily obtained, and the idle state of the engine is unstable.
Disclosure of Invention
The utility model aims to solve the technical problem of ensuring the stable conveying performance of a channel for conveying gas at idle speed, thereby obtaining a gas mixer for an engine.
In order to solve the technical problems, the utility model adopts the following technical scheme: the gas mixer for the engine is provided with a body, a choke plate and a throttle plate, wherein an air inlet channel and a gas inlet channel I are arranged in the body, the choke plate and the throttle plate are arranged in the body, the air outlet end of the fuel gas inlet channel I is communicated with the air inlet channel, the air resisting door plate, the air outlet end of the fuel gas inlet channel I and the air throttle plate are arranged one by one in the conveying direction of the air inlet channel, a gas inlet channel II is also arranged in the body, the gas inlet end of the gas inlet channel II is communicated with the gas inlet channel I, the air outlet end of the fuel gas inlet channel II is communicated with the air inlet channel, the throttle plate and the air outlet end of the fuel gas inlet channel II are arranged one by one in the conveying direction of the air inlet channel, the minimum cross section area of the gas inlet channel I is larger than that of the gas inlet channel II.
The air intake channel is used for conveying air and is in the structure of a Venturi tube; the gas inlet channel I is mainly used for conveying gas when the engine runs at a high speed; and the gas inlet channel II is mainly used for conveying gas when the engine runs at idle speed. On the whole, the design idea of this technical scheme is to place gas inlet channel II in the end that is closer to air inlet channel, even be located the low reaches of throttle plate. The opening amount of the throttle plate is used for controlling the gas outlet amount of combustible gas of the gas inlet channel I and the gas inlet channel II. Because the throttle plate is located gas inlet channel I, gas inlet channel II, when the opening of throttle plate is less than one fourth of maximum opening, the negative pressure at II exits of gas inlet channel is greater than the negative pressure at I exits of gas inlet channel, at this moment, I no combustible gas of gas inlet channel is carried in air inlet channel's venturi, the combustible gas that gets into in the engine combustion chamber from I enters of gas inlet channel reduces, the gas mainly gets into the engine combustion chamber through II entrances of gas inlet channel, because II cross sectional areas of gas inlet channel are little, the gas quantity of carrying from II entrances of gas inlet channel is less, thereby a small amount of gas obtains the gas mixture of suitable air-fuel ratio in air inlet channel, just so can make the engine be in low rotational speed. Because the throttle plate is closer to the engine, the negative pressure condition can be obtained more sufficiently, the process of conveying gas through the gas inlet channel II becomes smooth and stable, and the stability of the engine under idle running is further maintained.
When the opening amount of throttle plate was greater than the quarter of maximum aperture, the negative pressure in II exits of gas inlet channel equaled I exit negative pressure of gas inlet channel, and this moment, gas inlet channel I and gas inlet channel II all have combustible gas output, because the minimum cross sectional area of gas inlet channel I is far greater than gas inlet channel II and is little year face area, so, the combustible gas of the output of gas inlet channel I was used as the owner this moment. The larger the opening amount of the throttle plate is, the larger the negative pressure at the outlet of the gas inlet channel I is, and the more combustible gas is output. Combustible gas enters the venturi tube of the air inlet channel through the outlet of the gas inlet channel I and is mixed with air to form mixed gas with proper air-fuel ratio, and the mixed gas enters the combustion chamber of the engine to be combusted. To achieve stability and rated power output at high engine speeds.
In a low-temperature environment, when the engine is started in a cold machine, the engine can be started better only by using the mixed gas with higher concentration. Therefore, when the low-temperature starting is carried out, the throttle plate is firstly arranged at the opening position with the maximum opening degree, and the choke plate is arranged at the closing state. Because the choke door plant is located air inlet channel and is located the upper reaches of gas inlet channel I, gas inlet channel II, so when the choke door board was closed, the negative pressure increase of the department of giving vent to anger of gas inlet channel I, gas inlet channel II, the combustible gas of output increases, and the air that gets into in the air inlet channel simultaneously reduces to obtain more dense combustible gas mixture, thereby realize starting the engine smoothly under the low temperature environment. After the engine is started, the choke plate is opened.
The purity of combustible gas sources of different manufacturers is different, and slight difference exists between cylinder pressures of different engines, so that the phenomenon that a mixer is not matched with the engine under different engines and different use conditions can occur, and structures capable of adjusting the opening degree of a channel are respectively arranged on a gas inlet channel I and a gas inlet channel II. Concretely, be equipped with needle valve screw I corresponding to gas inlet channel I and needle valve screw II corresponding to gas inlet channel II on the body, the motion range of needle valve screw I intersects with gas inlet channel I, the motion range of needle valve screw II intersects with gas inlet channel II, the crossing region of inlet end, needle valve screw I and gas inlet channel I of gas inlet channel II arranges one by one on gas inlet channel I's direction of delivery. The minimum cross section areas of the gas inlet channel I and the gas inlet channel II can be changed by adjusting the extension of the needle valve screw into the channel, so that the throughput of combustible gas under the same opening degree obtained based on the throttle plate is changed, the slight adjustment of the mixing ratio of the combustible gas entering the engine is realized, and the adaptability of the mixer is improved.
Preferably, the minimum cross-sectional area of the gas inlet channel I is at least eight times the minimum cross-sectional area of the gas inlet channel II. This technical feature is the most rational design in practice.
After the technical scheme is adopted, the utility model comprises the following steps: the position of the output end of the channel for delivering the fuel gas in the idling state on the mixer is optimized, and the delivery performance of the channel for delivering the fuel gas becomes smooth and stable, thereby maintaining the stability of the engine in the idling operation.
Drawings
The present invention will be described in more detail with reference to the accompanying drawings and embodiments.
FIG. 1 is a front view of a gas mixer for an engine of the present invention;
FIG. 2 is a perspective view of a gas mixer for an engine according to the present invention;
FIG. 3 is a schematic structural diagram I of a gas mixer for an engine according to the present invention;
FIG. 4 is a schematic structural diagram II of a gas mixer for an engine according to the present invention;
fig. 5 is a schematic structural diagram of a gas inlet channel i and a gas inlet channel ii of the gas mixer for the engine.
Detailed Description
As shown in fig. 1, 2, 3, 4, and 5, the gas mixer for an engine includes a body 1, a choke plate 2, and a throttle plate 3. An air inlet channel 4, a fuel gas inlet channel I5 and a fuel gas inlet channel II 6 are arranged in the body 1. The choke plate 2 and the throttle plate 3 are movably arranged in the body 1 in a rotating mode; the air outlet end of the gas inlet channel I5 and the air outlet end of the gas inlet channel II 6 are communicated with the air inlet channel 4. The air outlet ends of the air resisting door plate 2, the air outlet end of the fuel gas inlet channel I5, the air throttle plate 3 and the air outlet end of the fuel gas inlet channel II 6 are arranged one by one in the conveying direction of the air inlet channel 4. The air inlet end of the fuel gas inlet channel II 6 is communicated with the fuel gas inlet channel I5, and the minimum cross-sectional area of the fuel gas inlet channel I5 is eight times of the minimum cross-sectional area of the fuel gas inlet channel II 6. The body 1 is provided with a needle valve screw I7 corresponding to the gas inlet channel I5 and a needle valve screw II 8 corresponding to the gas inlet channel II 6, and the needle valve screw I7 and the needle valve screw II 8 are both fixed on the body 1 through threads. After the needle valve screw I7 is screwed, one end of the needle valve screw I7 can extend into the gas inlet channel I5, so that the movement range of the needle valve screw I7 is intersected with the gas inlet channel I5, and the minimum cross section of the gas inlet channel I5 can be formed at the position occupied by the needle valve screw I7 of the gas inlet channel I5. After the needle valve screw II 8 is screwed, one end of the needle valve screw II 8 can extend into the gas inlet channel II 6, so that the movement range of the needle valve screw II 8 is intersected with the gas inlet channel II 6, and the minimum cross section of the gas inlet channel II 6 can be formed at the part of the gas inlet channel II 6 occupied by the needle valve screw II 8. The gas inlet end of the gas inlet channel II 6 and the intersecting area of the needle valve screw I7 and the gas inlet channel I5 are arranged one by one in the conveying direction of the gas inlet channel I5, namely the gas inlet end of the gas inlet channel II 6 is positioned at the downstream of the intersecting area of the needle valve screw I7 and the gas inlet channel I5.
When the engine is idling, the fuel required is small and the throttle plate 3 is opened by a small amount. Because the end of giving vent to anger of gas inlet channel I5 is located the upper reaches of throttle plate 3, and the end of giving vent to anger of gas inlet channel II 6 is located the low reaches of throttle plate 3 and is close to the position of engine air inlet, so the negative pressure in gas inlet channel II 6 is greater than the negative pressure that gas inlet channel I5 was given vent to anger and is held, the gas that provides for the engine this moment mainly comes from gas inlet channel II 6, because II 6 cross-sections of gas inlet channel are little, make the gas that provides less relatively, but can satisfy the demand of engine idling operation.
When the engine runs at a high speed, more fuel is needed, the opening momentum of the throttle plate 3 is large, the negative pressure difference between the air outlet end of the gas inlet channel I5 and the air outlet end of the gas inlet channel II 6 is not large, the gas inlet channel I5 and the gas inlet channel II 6 supply gas to the engine at the same time, and the minimum cross section area of the gas inlet channel I5 is far larger than that of the gas inlet channel II 6, so that the provided combustible gas amount is far larger than that of the engine during idling, and the high-speed running requirement of the engine is met.
When starting the engine in a low temperature environment, a richer mixture is required. When the throttle plate is started, the throttle plate 3 needs to be arranged at the maximum opening position, and the choke plate 2 needs to be arranged at the closing position. At the moment, the combustible gas is supplied to the gas inlet channel I5 and the gas inlet channel II 6. Because the choke plate 2 is closed, the air entering the air inlet passage 4 is greatly reduced, so that the obtained richer mixed gas enters the combustion chamber of the engine, and the purpose of easier starting is achieved.
Needle valve screw I7 and needle valve screw II 8's tip are the toper, cooperate with body 1 through the screw thread, its tip inserts respectively in gas inlet channel I5 and gas inlet channel II 6, through rotatory needle valve screw I7 and needle valve screw II 8, the control inserts the depth of gas inlet channel I5 and gas inlet channel II 6, thereby change the minimum cross sectional area of gas inlet channel I5 and gas inlet channel II 6, change the air input of gas, make the blender have wider adaptability.
Claims (2)
1. The utility model provides a gas mixer for engine, gas mixer for engine is equipped with body (1), choke plate (2), throttle plate (3), body (1) inside is equipped with air inlet channel (4) and gas inlet channel I (5), choke plate (2) and throttle plate (3) are installed inside body (1), the end of giving vent to anger and air inlet channel (4) intercommunication of gas inlet channel I (5), the end of giving vent to anger, throttle plate (3) of choke plate (2), gas inlet channel I (5) are arranged its characterized in that on the direction of delivery of air inlet channel (4) one by one: the body (1) is inside still to be equipped with gas inlet channel II (6), the inlet end and the gas inlet channel I (5) intercommunication of gas inlet channel II (6), the end and the air inlet channel (4) intercommunication of giving vent to anger of gas inlet channel II (6), the end of giving vent to anger of throttle plate (3) and gas inlet channel II (6) is arranged on the direction of delivery of air inlet channel (4) one by one, the minimum cross sectional area of gas inlet channel I (5) is greater than the minimum cross sectional area of gas inlet channel II (6).
2. The gas mixer for an engine according to claim 1, wherein: be equipped with needle valve screw I (7) corresponding to gas inlet channel I (5) on body (1) and needle valve screw II (8) corresponding to gas inlet channel II (6), the motion range of needle valve screw I (7) is crossing with gas inlet channel I (5), the motion range of needle valve screw II (8) is crossing with gas inlet channel II (6), the region that inlet end, needle valve screw I (7) and gas inlet channel I (5) of gas inlet channel II (6) are crossing arranges one by one on the direction of delivery of gas inlet channel I (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220337365.3U CN216741771U (en) | 2022-02-20 | 2022-02-20 | Gas mixer for engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220337365.3U CN216741771U (en) | 2022-02-20 | 2022-02-20 | Gas mixer for engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216741771U true CN216741771U (en) | 2022-06-14 |
Family
ID=81918290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220337365.3U Active CN216741771U (en) | 2022-02-20 | 2022-02-20 | Gas mixer for engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216741771U (en) |
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2022
- 2022-02-20 CN CN202220337365.3U patent/CN216741771U/en active Active
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