Mixer for gas engine

Abstract

The utility model provides a mixer for a gas engine, which relates to the technical field of mixers and comprises a mixer body, a gas inlet connecting component is arranged at the joint of the mixer body, a sealing mounting component is arranged at the joint of the gas inlet connecting component, and a flow control component is arranged in the sealing mounting component. The sealing installation assembly is connected with the mixer body through the connecting gas inlet assembly, the flow control assembly is used for controlling the gas inlet area in the sealing installation assembly so as to control the flow, a transition piece is arranged between the sealing installation assembly and the connecting gas inlet assembly, and the transition piece is used for smooth transition movement of gas so as to control the flow. And by arranging the flow control assembly, an electric push rod in the flow control assembly can flexibly drive a blocking plate to move in a quadrilateral variable air inlet groove under cooperative control of a controller and an ECU, the exposed area of the air inlet groove is changed in real time, and the air inlet amount is accurately controlled.

Description

Technical Field

[0001] This utility model relates to the field of mixer technology, and in particular to a mixer for a gas engine. Background Technology

[0002] An engine that uses natural gas as fuel has a specific air supply line, which basically includes a gas supply line, an air supply line, an air filter, and a mixer. The gas supply line is directly connected to the mixer, the air supply line is first connected to the air filter, the air filter is then connected to the mixer, and the mixer is connected to the engine.

[0003] In traditional gas engine mixer designs, the air intake port of the air intake manifold is typically a fixed structure, and its dimensions cannot be adjusted according to the engine's real-time operating conditions after manufacturing. When the engine is idling, the required air volume decreases significantly, but the intake port area remains constant, resulting in a low air velocity entering the mixer. This leads to poor mixing of the gas and air, making it difficult for them to fully contact and blend, resulting in incomplete combustion. This not only wastes energy but also increases pollutant emissions in the exhaust.

[0004] When an engine is under high load conditions such as acceleration or full load, it has a strong demand for air intake. However, the fixed-size air intake limits the amount of air that can enter, failing to meet the engine's power requirements under high load operation. The engine is forced to operate at lower efficiency, limiting its output power and affecting the overall performance and efficiency of the equipment.

[0005] This traditional design, which cannot flexibly adjust the size of the air intake according to engine operating conditions, makes it difficult for the mixer to maintain a good working condition under various operating conditions, becoming a key factor restricting the improvement of gas engine performance and energy conservation and emission reduction.

[0006] Therefore, we propose a mixer for gas engines. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies. Traditional gas engine mixers have a fixed air intake port, which cannot be adjusted in real time according to engine operating conditions. At idle, the unchanged intake port results in low flow rate, poor mixing, and incomplete combustion; under high load, the intake volume is limited, leading to low engine efficiency. Therefore, there is an urgent need to develop technology that can adjust the intake port size in real time to improve engine performance.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A gas engine mixer includes a mixer body, a connecting intake assembly at the connection point of the mixer body, a sealing mounting assembly at the connection point of the connecting intake assembly, a flow control assembly inside the sealing mounting assembly, and the sealing mounting assembly being connected to the mixer body via the connecting intake assembly. The flow control assembly is used to control the intake area within the sealing mounting assembly, thereby controlling the flow rate. A transition member is provided between the sealing mounting assembly and the connecting intake assembly for smooth gas transition movement, avoiding gas turbulence that could cause unsmooth intake.

[0010] As a preferred embodiment of this utility model, there are two connecting intake components, which are respectively installed on both sides of the sealing installation component, wherein the right side is used for connection between the mixer bodies, and the left side is used for connection with the main intake pipe.

[0011] As a preferred embodiment of this utility model, the connecting air intake assembly includes a connecting pipe, a second connecting flange is installed on the outer wall of the connecting pipe, and an insertion sealing plate is provided on the inner side wall of the connecting pipe.

[0012] As a preferred embodiment of this utility model, the sealing installation assembly includes a cylindrical mounting base, with annular insertion grooves provided on both sides of the inner side of the cylindrical mounting base near the outer side, and a quadrilateral variable air inlet groove provided at the center of the inner side of the cylindrical mounting base, and two sealing gaskets provided on the inner walls of the two annular insertion grooves.

[0013] As a preferred embodiment of this utility model, the flow control component includes a mounting housing, a baffle plate is provided at the bottom inside the mounting housing, two electric push rods are provided at the top of the baffle plate, a controller is provided between the two controllers, and a connecting cable is provided at the top of the controller.

[0014] As a preferred embodiment of this utility model, the controller is connected to the ECU via a connecting cable, and the electric push rod can drive the baffle plate to move within the quadrilateral variable intake slot, thereby changing the exposed area of ​​the quadrilateral variable intake slot and realizing the control of gas flow.

[0015] As a preferred embodiment of this utility model, the plug sealing plate of the connecting pipe is inserted into the annular plug groove, and the plug sealing plate is connected and squeezed with two sealing gaskets to form a seal. The connecting pipe is connected to the first connecting flange of the cylindrical mounting base through the second connecting flange, and the two are fixed together by bolts.

[0016] As a preferred embodiment of this utility model, the shape of the transition piece is a transitional shape from a quadrilateral to a circular arc, so as to adapt to the connection between the quadrilateral variable intake slot and the connecting pipe, and to avoid the extension of protruding edges when the two are connected, which would cause unstable airflow turbulence.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] In this invention, by setting up a flow control component, the electric push rod can flexibly drive the baffle plate to move within the quadrilateral variable intake slot under the coordinated control of the controller and ECU, thereby changing the exposed area of ​​the intake slot in real time and precisely controlling the intake volume. This solves the problem that traditional fixed intake ports cannot adjust the intake volume according to engine operating conditions. At idle speed, the intake area can be reduced to increase the air velocity, promote full mixing of fuel and air, improve combustion efficiency, and reduce energy waste and pollutant emissions. At high load, the intake area can be increased to fully meet the engine's demand for intake volume, thereby improving the engine's output power and working efficiency.

[0019] Secondly, the design of the sealing installation assembly and the connecting air intake assembly ensures good sealing performance. The plug sealing plate of the connecting pipe is tightly squeezed against the sealing gasket in the annular plug groove, and then fixed with bolts to the first connecting flange of the cylindrical mounting base through the second connecting flange, which effectively prevents gas leakage and ensures the stability and reliability of the mixer operation.

[0020] Furthermore, the unique quadrilateral-to-circular arc transition design of the transition component perfectly matches the connection between the quadrilateral variable intake slot and the connecting pipe, avoiding airflow instability caused by the protruding edge extension at the connection point. This allows the gas to move smoothly through the transition, further improving the smoothness of gas flow and mixing effect within the mixer, thereby comprehensively enhancing the overall performance of the gas engine. Attached Figure Description

[0021] Figure 1 A schematic diagram of the main structure of a mixer for a gas engine provided by this utility model;

[0022] Figure 2 A schematic diagram of the main body unfolded structure of a mixer for a gas engine provided by this utility model;

[0023] Figure 3 A schematic diagram of a flow control component for a gas engine mixer provided by this utility model;

[0024] Figure 4 A cross-sectional structural diagram of a gas engine mixer provided by this utility model;

[0025] Figure 5 This utility model provides a schematic diagram showing the connection between the main body of a gas engine mixer and the mixer body.

[0026] Legend: 1. Mixer body; 21. Cylindrical mounting base; 22. First connecting flange; 23. Annular plug groove; 24. Quadrilateral variable air inlet groove; 25. Sealing gasket; 31. Mounting housing; 32. Baffle plate; 33. Electric push rod; 34. Controller; 35. Connecting cable; 41. Connecting pipe; 42. Second connecting flange; 43. Plug sealing plate; 5. Transition piece. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be provided below with reference to relevant embodiments, and several embodiments of this utility model will be given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this utility model more thorough and complete.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Unless otherwise defined, 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Example

[0032] like Figure 1-5As shown, this utility model provides a technical solution: the flow control component set in this utility model plays a key role in improving the performance of the gas engine mixer. The main structure of the component is the mounting housing 31, which is made of high-strength aluminum alloy with good heat dissipation performance. It can effectively resist the high temperature and mechanical vibration generated during engine operation and ensure the stable operation of internal components. At the bottom of the mounting housing 31, the baffle plate 32 is firmly fixed by high-precision machining process. The design of the baffle plate 32 is extremely ingenious. Its shape is precisely matched with the cross-sectional shape of the quadrilateral variable intake groove 24, which can accurately control the effective flow area of ​​the intake groove.

[0033] The top of the baffle plate 32 is equipped with two electric push rods 33, which consist of a high-performance motor and a lead screw transmission mechanism. The high-performance motor adopts DC brushless motor technology, which has the advantages of fast response speed, high control precision, stable operation and long service life. The rotor inside the motor is made of rare earth permanent magnet material. Under the action of the rotating magnetic field generated by the stator, it can achieve efficient and stable rotation. The lead screw transmission mechanism converts the rotational motion of the motor into linear motion. Its working principle is based on the transmission characteristics of the screw pair. The screw screw surface is engraved with a precision thread, which cooperates with the nut. When the motor drives the screw to rotate, the nut will move linearly along the axial direction of the screw, thereby pushing the baffle plate 32 to move up and down in the quadrilateral variable air intake slot 24.

[0034] When the controller 34 receives a signal from the ECU (Electronic Control Unit), the electric push rod 33 starts working based on the principle of forward and reverse rotation of the motor. The ECU integrates advanced sensor signal acquisition and processing technology. It monitors the engine's operating condition in real time through sensors connected to key parts of the engine, such as the crankshaft position sensor, throttle position sensor, and intake pressure sensor, and accurately obtains key parameters such as engine speed, load, and intake pressure. When the engine is idling, the intake pressure sensor detects that the intake pressure is low. Combined with the low speed information fed back by the crankshaft position sensor, the ECU comprehensively judges that the engine's intake air demand is reduced at this time, and sends a corresponding control command to the controller 34. After receiving the command, the controller 34 accurately transmits the electrical signal to the electric push rod 33 through the connecting cable 35. The motor of the electric push rod 33 starts after receiving the signal. Its internal electronic commutator accurately controls the forward and reverse rotation direction of the motor according to the signal sent by the controller 34, so that the screw drive mechanism pushes the baffle plate 32 to move upward in the quadrilateral variable intake slot 24.

[0035] According to fluid mechanics principles, in the gas flow formula Q = vA (where Q is the flow rate, v is the velocity, and A is the cross-sectional area), as the baffle plate 32 moves upward, the exposed area A of the quadrilateral variable intake slot 24 decreases. Under relatively stable gas pressure, according to Bernoulli's equation, the velocity v will increase accordingly. A higher air velocity allows for more thorough mixing of the fuel gas and air in a shorter time. For example, in traditional fixed-intake mixers, the mixing time between fuel gas and air is long and the mixing uniformity is low, resulting in a combustion efficiency of only 70%-80%. However, with the flow control component of this invention, the mixing uniformity is significantly improved under idling conditions, and the combustion efficiency can be increased to 90%-95%. This effectively reduces energy waste and pollutant emissions. Conversely, when the engine is under high load, the intake pressure sensor detects an increase in intake pressure. Combined with the large opening information from the throttle position sensor, the ECU senses that the engine needs more intake air and sends a command to the controller 34. The controller 34 transmits the signal to the electric push rod 33 through the connecting cable 35. The motor of the electric push rod 33 moves in the opposite direction, driving the screw transmission mechanism to move the baffle plate 32 downward, increasing the exposed area of ​​the quadrilateral variable intake slot 24, meeting the engine's demand for intake air, and improving the engine's output power and working efficiency. Under high load conditions, the engine's output power can be increased by 10%-15% compared to traditional mixers.

[0036] Its workflow is as follows: The ECU monitors the engine operating condition in real time through sensors connected to various parts of the engine, performs high-speed calculation and analysis on the large amount of data collected, and sends precise control signals to the controller 34 according to the operating condition. After receiving the signal, the controller 34 transmits the electrical signal to the electric push rod 33 through the connecting cable 35. The motor of the electric push rod 33 starts according to the signal and drives the baffle plate 32 to move precisely within the quadrilateral variable intake slot 24 through the lead screw transmission mechanism, thereby changing the exposed area of ​​the intake slot and realizing precise control of the intake volume to adapt to the needs of different engine operating conditions.

[0037] The cylindrical mounting base 21 of the sealing mounting assembly is made of high-strength aluminum alloy. This aluminum alloy undergoes a special heat treatment process, giving it excellent strength and corrosion resistance. In the complex working environment of the engine, it must withstand not only mechanical vibration and gas pressure, but also the effects of humidity and corrosive gases. The high-strength aluminum alloy effectively resists these adverse factors, ensuring the structural integrity and long-term stability of the cylindrical mounting base 21. On both sides of the cylindrical mounting base 21, near the outer side, annular insertion grooves 23 are carefully designed using precision machining. The two sealing gaskets 25 installed in the grooves are made of highly elastic and aging-resistant nitrile rubber. Nitrile rubber has excellent compression set recovery ability, and its molecular structure contains special polar groups, which allow it to tightly adhere to the contact surface when compressed, forming an efficient sealing barrier. Even under long-term high pressure and high temperature environments, the sealing gaskets 25 can still maintain good elasticity and sealing performance, effectively preventing gas leakage.

[0038] The connecting pipe 41, which connects to the intake assembly, is also made of aluminum alloy. Its inner wall's insert sealing plate 43 undergoes fine surface treatment, with surface roughness controlled to an extremely low level to ensure a tight fit with the sealing gasket 25. The second connecting flange 42 mounted on the outer wall of the connecting pipe 41 and the first connecting flange 22 of the cylindrical mounting base 21 are both manufactured using forging technology, possessing high strength and flatness. During connection, high-strength bolts are used for fixing. These bolts are made of high-quality alloy steel and undergo special heat treatment, possessing high strength and good fatigue resistance. When tightening the bolts, a torque wrench is used to precisely control the tightening force, ensuring a tight fit between the two flanges. When the plug-in sealing plate 43 is inserted into the annular plug-in groove 23, it is squeezed against the sealing gasket 25. According to the sealing principle, this multi-seal structure greatly increases the resistance to gas leakage. For gas to leak, it must pass through multiple sealing interfaces. Each layer of sealing gasket 25 and plug-in sealing plate 43 plays a blocking role. For example, in a traditional simple sealing structure, the gas leakage rate may reach 1%-2%, while with the multi-seal structure of this utility model, the gas leakage rate can be reduced to 0.1%-0.2%, effectively preventing gas leakage from the connection part, ensuring the stability and reliability of the mixer during operation, and avoiding problems such as mixing ratio imbalance and power reduction caused by gas leakage.

[0039] The workflow is as follows: During installation, firstly, clean the plug-in sealing plate 43 of the connecting pipe 41 to ensure that the surface is free of impurities. Then, slowly insert the plug-in sealing plate 43 into the annular plug-in groove 23 of the cylindrical mounting base 21. During the insertion process, ensure that the plug-in sealing plate 43 and the sealing gasket 25 are in uniform contact and tightly pressed. Next, align the second connecting flange 42 of the connecting pipe 41 with the first connecting flange 22 of the cylindrical mounting base 21. Use high-strength bolts to pass through the bolt holes on the flanges in sequence, and tighten the bolts with a torque wrench according to the specified torque value to complete the connection between the sealing mounting assembly and the connecting air intake assembly, ensuring the overall sealing performance of the mixer.

[0040] The transition piece 5 is made of a special aluminum alloy, which not only has good machinability but also excellent corrosion resistance and thermal conductivity. The transition piece 5 is made through precision casting and multiple high-precision machining processes to ensure that its dimensional accuracy and surface quality reach extremely high standards. Its unique quadrilateral to circular arc transition design contains ingenious fluid dynamics principles. Due to its shape characteristics, the gas output from the quadrilateral variable intake slot 24 will undergo a drastic change in gas flow line when entering the circular connecting pipe 41 without the transition piece 5. According to the boundary layer theory in fluid dynamics, when the gas flows through the pipe with a sudden change in shape, a separation zone will be formed at the corner, resulting in unstable airflow turbulence and generating a large number of eddies and turbulence, which seriously affects the smooth flow and mixing effect of the gas.

[0041] The curved design of transition piece 5 guides the gas through a smooth transition. As the gas flows within transition piece 5, its streamlines gradually change. The inner wall of transition piece 5 is finely polished, resulting in extremely low surface roughness, further reducing the resistance to gas flow. According to the fluid continuity equation, under ideal conditions, the gas velocity and flow rate within transition piece 5 remain stable. For example, without transition piece 5, the velocity fluctuation at the connection point may reach 10%-20%, while with transition piece 5, the velocity fluctuation can be reduced to 1%-2%, thus significantly improving the smoothness of gas flow within the mixer. Smooth gas flow helps the gas and air mix more evenly, further enhancing the mixing effect. In practical applications, using transition piece 5 can improve the uniformity of gas-air mixing within the mixer by 15%-20%, ultimately comprehensively improving the overall performance of the gas engine, making the engine run more smoothly and efficiently, and improving fuel economy by 8%-10% compared to traditional mixers.

[0042] Its working process is as follows: when the gas flows out from the quadrilateral variable intake slot 24, it first enters the transition piece 5. Under the guidance of the transition piece 5, the gas flow line changes smoothly according to the designed arc. The gas enters the connecting pipe 41 with a stable flow rate and flow rate, ensuring the smooth flow and mixing of the gas in the mixer, laying the foundation for the subsequent efficient combustion process.

[0043] Summarize the work process

[0044] When the gas engine is working, the ECU monitors the engine's operating condition in real time through sensors connected to key parts of the engine, such as the crankshaft position sensor, throttle position sensor, and intake pressure sensor. These sensors convert the collected analog signals such as engine speed, load, and intake pressure into digital signals and transmit them quickly to the ECU. The ECU performs high-speed calculations and analysis on this large amount of data and sends precise control signals to the controller 34 of the flow control component according to the operating conditions. After receiving the signal, the controller 34 transmits the electrical signal to the electric push rod 33 through the connecting cable 35. The motor of the electric push rod 33 starts according to the signal and drives the baffle plate 32 to move precisely within the quadrilateral variable intake slot 24 through the lead screw transmission mechanism, changing the exposed area of ​​the intake slot and realizing precise control of the intake volume.

[0045] Meanwhile, outside air enters the mixer through the connecting pipe 41 connecting the intake assembly. Under the sealing effect of the installed sealing mounting assembly, the plug sealing plate 43 of the connecting pipe 41 and the sealing gasket 25 in the annular plug groove 23 of the cylindrical mounting seat 21 are tightly fitted. After the bolts are tightened, a reliable sealing structure is formed, effectively preventing air leakage. During the air intake process, the air first passes through the transition piece 5. The unique shape design of the transition piece 5 guides the airflow line to change smoothly and enter the quadrilateral variable intake slot 24 in a stable state. In the quadrilateral variable intake slot 24, the air and gas are fully mixed according to the precisely controlled ratio. The mixed gas enters the mixer body 1 through the side connecting the intake assembly and the mixer body 1 and participates in the combustion process of the engine. In the combustion chamber, the mixed gas burns rapidly after the spark plug is ignited, generating high-temperature and high-pressure gas, which drives the piston to move, converting chemical energy into mechanical energy and driving the engine to run. The whole process realizes the function of the gas engine mixer to flexibly adjust the intake volume according to the engine operating conditions, ensure gas sealing and smooth flow, and improve the overall performance of the engine, so that the engine can maintain a high-efficiency and stable operating state under different operating conditions.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mixer for a gas engine, comprising a mixer body (1), characterized in that: The mixer body (1) is provided with a connecting air intake assembly at the connection point. The connecting air intake assembly is provided with a sealing installation assembly at the connection point. The sealing installation assembly is provided with a flow control assembly inside. The sealing installation assembly is connected to the mixer body (1) through the connecting air intake assembly. The flow control assembly is used to control the air intake area inside the sealing installation assembly, thereby controlling the flow rate. A transition piece (5) is provided between the sealing installation assembly and the connecting air intake assembly. The transition piece (5) is used for smooth gas transition movement to avoid gas turbulence causing unsmooth air intake.

2. A mixer for a gas engine according to claim 1, characterized in that: The number of the connecting air intake components is two, which are respectively installed on both sides of the sealing installation component. The right side is used for connection between the mixer body (1), and the left side is used for connection with the main air intake pipe.

3. A mixer for a gas engine according to claim 2, characterized in that: The connecting air intake assembly includes a connecting pipe (41), a second connecting flange (42) is installed on the outer wall of the connecting pipe (41), and an insertion sealing plate (43) is provided on the inner side wall of the connecting pipe (41).

4. A mixer for a gas engine according to claim 3, characterized in that: The sealing mounting assembly includes a cylindrical mounting base (21), with annular insertion grooves (23) on both sides of the cylindrical mounting base (21) near the outer side, and a quadrilateral variable air intake groove (24) at the center of the cylindrical mounting base (21). Two sealing gaskets (25) are provided on the inner walls of the two annular insertion grooves (23).

5. A mixer for a gas engine according to claim 4, characterized in that: The flow control assembly includes a mounting housing (31), a baffle plate (32) is provided at the bottom inside the mounting housing (31), two electric push rods (33) are provided at the top of the baffle plate (32), a controller (34) is provided between the two electric push rods (33), and a connecting cable (35) is provided at the top of the controller (34).

6. A mixer for a gas engine according to claim 5, characterized in that: The controller (34) is connected to the ECU via a connecting cable (35). The electric push rod (33) can drive the baffle plate (32) to move within the quadrilateral variable intake slot (24), thereby changing the exposed area of ​​the quadrilateral variable intake slot (24) and controlling the gas flow rate.

7. A mixer for a gas engine according to claim 6, characterized in that: The plug sealing plate (43) of the connecting pipe (41) is inserted into the annular plug groove (23), and the plug sealing plate (43) is connected and squeezed with the two sealing gaskets (25) to form a seal. The connecting pipe (41) is connected to the first connecting flange (22) of the cylindrical mounting base (21) through the second connecting flange (42), and the two are fixed by bolts.

8. A mixer for a gas engine according to claim 7, characterized in that: The transition piece (5) is in the shape of a quadrilateral to a circular arc transition to adapt to the connection between the quadrilateral variable intake slot (24) and the connecting pipe (41), so as to avoid the extension of the protruding edge when the two are connected, which would cause airflow turbulence and instability.

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