Methanol liquid supply device of methanol dual-fuel diesel engine

Abstract

The utility model relates to a methanol liquid supply device of a methanol dual-fuel diesel engine, which relates to the technical field of diesel engines and comprises a methanol rail and a row of methanol injectors which are positioned below the methanol rail, are distributed at equal intervals and are inserted into a cylinder of the diesel engine, and a processing barrel for purifying and heating methanol is arranged between the methanol rail and the methanol injectors. An upper flexible connecting pipe for connecting the top end of the treatment barrel with the methanol rail is arranged between the top end of the treatment barrel and the methanol rail; a lower flexible connecting pipe for connecting the bottom end of the treatment barrel with the methanol injector is arranged between the bottom end of the treatment barrel and the methanol injector; the water bath box is used for heating the treatment cylinders; and the number of the treatment cylinders is in one-to-one correspondence with that of the methanol ejectors. According to the methanol liquid supply device, methanol is purified and heated by arranging the filtering barrel, the heating barrel, the filtering assembly and the heating assembly, the purity of the methanol entering the air cylinder is ensured, the combustion stability and efficiency are ensured, the atomization quality of the methanol is improved through ultrasonic waves, and the mixing uniformity of the methanol and diesel oil is promoted.

Description

Technical Field

[0001] The utility model belongs to the technical field of diesel engines, and specifically relates to a methanol supply device for a methanol dual-fuel diesel engine. Background Technique

[0002] The methanol supply device is a system specially designed to supply methanol fuel to a diesel engine. It is a fuel system that transports methanol from a storage container to the engine for co-combustion with diesel. The methanol supply device usually consists of a methanol tank, an alcohol pump, an alcohol rail, a rail pressure sensor, a filter, a heating device, and a series of control valves and pipelines. The methanol tank is used to store methanol fuel, and the alcohol pump is responsible for pumping methanol out of the methanol tank and pressurizing it to transport it into the alcohol rail. The alcohol rail is a closed pipeline system used to store and distribute methanol fuel to each injection point. The rail pressure sensor is used to monitor the pressure inside the alcohol rail to ensure the stability of methanol supply. The filter is used to filter impurities in methanol to prevent nozzle blockage or damage to engine components. The heating device is used to heat methanol when needed to improve its fluidity and atomization effect.

[0003] After retrieval, the patent publication number CN105156245B, and the publication date November 14, 2017 discloses a fuel rail assembly, including a fuel rail body and a heating device. The heating device includes a housing connected to the fuel rail body and a heating resistor disposed inside the housing. The fuel rail assembly of the present utility model, by providing a heating device connected to the fuel rail body and arranging a heating resistor inside the heating device, has a small overall structure volume, is conducive to layout, can save layout space, and at the same time, compared with a heating injector, the cost is relatively small, taking into account the advantages of technology and cost.

[0004] The following are the deficiencies of this patent:

[0005] 1. It is difficult for this fuel rail to filter and heat methanol simultaneously. Due to the relatively high viscosity of methanol, the filtration efficiency of a general filter is low. Only using the heating resistor in the text to heat methanol results in high heating energy consumption, and there are disadvantages such as uneven heating or uneven heat distribution, leading to unstable temperature control of methanol and an unsatisfactory preheating effect.

[0006] 2. The heating energy-saving performance of this fuel rail is not very ideal. The waste heat generated in the diesel engine cylinder is a potential energy source, and this device fails to make full use of this waste heat for heating, resulting in energy waste.

[0007] Therefore, we provide a methanol supply device for a methanol dual-fuel diesel engine to solve the above problems. Content of the Utility Model

[0008] The purpose of the present utility model is to provide a methanol supply device for a methanol dual-fuel diesel engine in view of the problems in the background technique.

[0009] The present utility model realizes the above object through the following technical solutions:

[0010] A methanol supply device for a methanol dual-fuel diesel engine, comprising an alcohol rail and a row of methanol injectors evenly distributed at equal intervals below the alcohol rail and inserted into the diesel engine cylinder. A treatment cylinder for purifying and heating methanol is provided between the alcohol rail and the methanol injector. An upper flexible connecting pipe for connecting the two is provided between the top end of the treatment cylinder and the alcohol rail, and a lower flexible connecting pipe for connecting the two is provided between the bottom end of the treatment cylinder and the methanol injector.

[0011] It further includes a water bath tank for heating the treatment cylinder. The number of the treatment cylinders corresponds to the number of the methanol injectors one by one, and a plurality of the treatment cylinders are evenly distributed in a circumferential direction in the water bath tank; an ultrasonic component for driving the treatment cylinder to vibrate at a high frequency is further provided in the water bath tank.

[0012] As a further optimized solution of the present utility model, the upper flexible connecting pipe is fixedly penetrated and fixed on the top surface of the water bath tank, and the lower flexible connecting pipe is fixedly penetrated and fixed on the bottom surface of the water bath tank.

[0013] As a further optimized solution of the present utility model, the treatment cylinder includes a vibration cylinder body, a filter cylinder body located at the bottom end of the vibration cylinder body and threadedly connected thereto, and a heating cylinder body located at the bottom end of the filter cylinder body and threadedly connected thereto; the lower end of the vibration cylinder body is located at the water surface of the water bath tank.

[0014] As a further optimized solution of the present utility model, the ultrasonic component includes an ultrasonic generator fixed at the center of the water bath tank and a ring body fixed on the inner wall of the upper end of the water bath tank; a plurality of transmission frames corresponding to the treatment cylinders one by one are provided around the ultrasonic generator, and the vibration cylinder body is located in the transmission frame and abuts against it; support plates fixed on the ring body are provided on both side surfaces of the transmission frame, and a first spring is fixedly provided between the support plate and the transmission frame.

[0015] As a further optimized solution of the present utility model, the bottom end of the ultrasonic generator is located at the lower end of the water body in the water bath tank, and the top end of the ultrasonic generator is located above the water surface of the water bath tank; the transmission frame and the ring body are both located above the water surface of the water bath tank.

[0016] As a further optimized solution of the present utility model, a plurality of heat pipes evenly distributed in a circumferential direction are embedded and fixed on the bottom surface of the water bath tank, and the bottom ends of the heat pipes are inserted into the diesel engine cylinder; an auxiliary electric heating component is further provided in the water bath tank.

[0017] As a further optimization solution of the utility model, a filtering component for purifying methanol is arranged inside the filtering cylinder body. The filtering component includes an inner cylinder body and two first elastic rings fixedly sleeved at both ends of the inner cylinder body; the first elastic rings are also fixed on the inner wall of the filtering cylinder body, and a plurality of second springs evenly distributed along the circumference are arranged between the inner cylinder body and the filtering cylinder body.

[0018] As a further optimization solution of the utility model, a plurality of baffles distributed at equal intervals and staggered are arranged inside the inner cylinder body, and a filter screen is arranged on the side of each baffle.

[0019] As a further optimization solution of the utility model, a heating component for heating methanol is arranged inside the heating cylinder body. The heating component includes two ring plates respectively fixed at both ends of the heating cylinder body and a plurality of heating plates evenly distributed between the two ring plates; a plurality of third springs evenly distributed along the circumference are arranged between the heating plates and the ring plates and between adjacent heating plates, and a second elastic ring is fixedly arranged between the heating plate and the heating cylinder body; a blanking hole for methanol to flow down is arranged on the heating plate, and a material guiding hopper for guiding methanol to flow to the center of the lower heating plate is arranged at the bottom of the heating plate.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. By arranging a filtering cylinder body, a heating cylinder body, a filtering component and a heating component, the utility model purifies and heats methanol, ensures the purity of methanol entering the cylinder, makes it easier to mix with air, guarantees the stability and efficiency of combustion. At the same time, the filtering component and the heating component can vibrate along with the vibration of ultrasonic waves, greatly improving the purification and heating effects of methanol.

[0022] 2. By arranging a water bath tank and heat pipes, the utility model assists in heating methanol in the treatment cylinder, reduces the failure risk of the diesel engine caused by poor methanol supply, and at the same time makes full use of the waste heat generated during the operation of the diesel engine, realizes the recycling of energy, and improves the energy utilization efficiency.

[0023] 3. By arranging an ultrasonic component, the utility model effectively refines methanol liquid into tiny methanol droplets by using the cavitation effect and mechanical vibration of ultrasonic waves, promotes the atomization and evaporation of methanol liquid, improves the atomization quality of methanol, promotes the mixing uniformity of methanol and diesel, forms a more uniform mixture in the combustion chamber, and improves the combustion efficiency. Description of the Drawings

[0024] Figure 1 is a three-dimensional schematic diagram of the overall structure of the utility model;

[0025] Figure 2 is a schematic diagram of the connection structure of the methanol rail, the treatment cylinder and the methanol injector of the utility model;

[0026] Figure 3 Schematic diagram of the internal structure of the water bath box of the present utility model;

[0027] Figure 4 Schematic diagram of the structure of the ultrasonic component of the present utility model;

[0028] Figure 5 Schematic diagram of the explosion structure of the processing cylinder of the present utility model;

[0029] Figure 6 Front sectional view of the structure of the filtering component of the present utility model;

[0030] Figure 7 Front sectional view of the structure of the heating component of the present utility model;

[0031] Figure 8 Schematic diagram of the three-dimensional structure of the heating component of the present utility model Figure 1 ;

[0032] Figure 9 Schematic diagram of the three-dimensional structure of the heating component of the present utility model Figure 2 。

[0033] In the figure:

[0034] 1, alcohol rail; 2, methanol injector; 3, processing cylinder; 301, vibrating cylinder body; 302, filtering cylinder body; 303, heating cylinder body; 304, filtering component; 304a, inner cylinder body; 304b, first elastic ring; 304c, second spring; 304d, baffle; 304e, filter screen; 305, heating component; 305a, ring plate; 305b, heating plate; 305c, third spring; 305d, second elastic ring; 305e, blanking hole; 305f, material guiding hopper; 4, upper flexible connecting pipe; 5, lower flexible connecting pipe; 6, water bath box; 601, heat pipe; 7, ultrasonic component; 701, ultrasonic generator; 702, transmission frame; 703, first spring; 704, ring body; 705, support plate. Specific embodiments

[0035] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0036] Embodiment 1

[0037] In order to solve the problem that the existing methanol supply device is difficult to purify and heat methanol simultaneously, has high heating energy consumption, and has the disadvantages of uneven heating or uneven heat distribution, resulting in unstable temperature control of methanol and unsatisfactory preheating effect, please refer to Figure 1 - Figure 2 , a methanol supply device for a methanol dual-fuel diesel engine provided by the present utility model includes an alcohol rail 1 and a row of methanol injectors 2 that are equally spaced and inserted into the diesel engine cylinder below the alcohol rail 1. A treatment cylinder 3 for purifying and heating methanol is provided between the alcohol rail 1 and the methanol injector 2. An upper flexible connecting pipe 4 for connecting the two is provided between the top end of the treatment cylinder 3 and the alcohol rail 1. A lower flexible connecting pipe 5 for connecting the two is provided between the bottom end of the treatment cylinder 3 and the methanol injector 2. It can purify methanol through the treatment cylinder 3 to ensure the purity of methanol entering the cylinder, heat the methanol to make it easier to mix with air, and ensure the stability and efficiency of combustion.

[0038] For the convenience of installation and maintenance of the treatment cylinder 3, as Figure 5 shown, the treatment cylinder 3 includes a vibrating cylinder body 301, a filtering cylinder body 302 threadedly connected to the bottom end of the vibrating cylinder body 301, and a heating cylinder body 303 threadedly connected to the bottom end of the filtering cylinder body 302. The split design enables the treatment cylinder 3 to be conveniently taken out for maintenance and replacement of corresponding damaged parts. Regular maintenance can maintain its good filtering performance and heating performance, extend the service life, and ensure the treatment effect.

[0039] As Figure 5 - Figure 6 shown, a filtering assembly 304 for purifying methanol is provided inside the filtering cylinder body 302. The filtering assembly 304 includes an inner cylinder body 304a and two first elastic rings 304b fixedly sleeved at both ends of the inner cylinder body 304a; the first elastic rings 304b are also fixed on the inner wall of the filtering cylinder body 302; a plurality of baffles 304d are arranged at equal intervals and staggered inside the inner cylinder body 304a, and a filter screen 304e is provided on the side of each baffle 304d. The high-pressure methanol in the alcohol rail 1 enters the treatment cylinder 3 through the upper flexible connecting pipe 4, then enters the filtering cylinder body 302 through the vibrating cylinder body 301, and after being purified by a plurality of filter screens 304e, it can effectively intercept particulate matters and impurities in methanol.

[0040] As Figure 5 、 Figure 7 - Figure 9As shown in the figure, a heating assembly 305 for heating methanol is provided inside the heating cylinder 303. The heating assembly 305 includes two ring plates 305a respectively fixed at both ends of the heating cylinder 303 and a plurality of equally spaced heating discs 305b located between the two ring plates 305a; a second elastic ring 305d is fixedly provided between the heating disc 305b and the heating cylinder 303; a blanking hole 305e for the methanol to flow down is provided on the heating disc 305b, and a material guiding hopper 305f for guiding the methanol to the center of the lower heating disc 305b is provided at the bottom of the heating disc 305b. The methanol flowing down from the filtering cylinder 302 enters the heating cylinder 303 and drips onto the heating disc 305b. The heating disc 305b uses the principle of resistance heating to heat the methanol. When the current passes through the resistance material of the heating disc 305b, heat will be generated, thereby heating the methanol to the required temperature, and then flowing through the blanking hole 305e and the material guiding hopper 305f to the lower heating disc 305b for continuous heating. After being heated by multiple layers of heating discs 305b, it enters the methanol injector 2 through the lower flexible connecting pipe 5; the setting of multiple layers of heating discs 305b can provide a more uniform heat distribution, avoid local overheating, ensure uniform heating of methanol, reduce heat loss, improve the overall heating efficiency, and make the heating process faster and more energy-saving.

[0041] Embodiment Two

[0042] On the basis of Embodiment One, in order to further improve the heating energy-saving performance of the methanol supply device, as Figure 1 、 Figure 3 shown, it further includes a water bath tank 6 for heating the treatment cylinder 3. The number of treatment cylinders 3 corresponds one-to-one to the number of methanol injectors 2, and multiple treatment cylinders 3 are evenly distributed along the circumference inside the water bath tank 6; the upper flexible connecting pipe 4 is fixedly penetrated and fixed on the top surface of the water bath tank 6, the lower flexible connecting pipe 5 is fixedly penetrated and fixed on the bottom surface of the water bath tank 6, and the lower end of the vibration cylinder 301 is located at the water surface of the water bath tank 6. It can assist in heating the methanol in the treatment cylinder 3 through the water bath tank 6, reduce the failure risk of the diesel engine caused by poor methanol supply, and at the same time the water bath tank 6 also plays a role in heat preservation and protection, enabling the treatment cylinder 3 to be safely placed therein.

[0043] A plurality of heat pipes 601 evenly distributed along the circumference are fixedly embedded on the bottom surface of the water bath tank 6, and the bottom ends of the heat pipes 601 are inserted into the diesel engine cylinder; an auxiliary electric heating assembly is also provided inside the water bath tank 6. The heat pipes 601 absorb the heat in the diesel engine cylinder to heat the water bath tank 6, make full use of the waste heat generated during the operation of the diesel engine, realize the recovery and utilization of energy, improve the energy utilization efficiency, enhance the stability and reliability of the liquid supply system, and contribute to environmental protection and sustainable development.

[0044] Embodiment Three

[0045] Based on the first and second embodiments, in order to enhance the purification and heating effect of the treatment cylinder 3, as Figure 1 , Figure 4 shown, an ultrasonic component 7 for driving the treatment cylinder 3 to vibrate at high frequency is further provided in the water bath tank 6. The ultrasonic component 7 can apply ultrasonic treatment to the methanol in the treatment cylinder 3. By utilizing the cavitation effect and mechanical vibration of ultrasonic waves, the methanol liquid can be effectively refined into tiny methanol droplets, improving the atomization effect of methanol, promoting the mixing uniformity of methanol and diesel, enabling the fuel to form a more uniform mixture in the combustion chamber, and improving the combustion efficiency.

[0046] The ultrasonic component 7 includes an ultrasonic generator 701 fixed at the exact center of the water bath tank 6 and a ring body 704 fixed on the inner wall of the upper end of the water bath tank 6; a plurality of transmission frames 702 corresponding to the treatment cylinder 3 one by one are provided around the ultrasonic generator 701, and the vibrating cylinder body 301 is located within the transmission frame 702 and abuts against it; support plates 705 fixed on the ring body 704 are provided on both side surfaces of the transmission frame 702, and a first spring 703 is fixedly provided between the support plate 705 and the transmission frame 702; the bottom end of the ultrasonic generator 701 is located below the water level in the water bath tank 6, and the top end of the ultrasonic generator 701 is located above the water surface of the water bath tank 6; both the transmission frame 702 and the ring body 704 are located above the water surface of the water bath tank 6. During use, the ultrasonic generator 701 emits high-frequency vibrations. On the one hand, the vibrations are transmitted to the surrounding transmission frames 702. The transmission frames 702 drive the first spring 703 to vibrate, and drive the treatment cylinder 3 to vibrate. The treatment cylinder 3 drives the methanol liquid therein to vibrate. The transmission frames 702 play a magnifying effect, enabling the ultrasonic generator 701 to drive multiple treatment cylinders 3 to vibrate simultaneously. On the other hand, the ultrasonic generator 701 directly applies ultrasonic waves to the water body in the water bath tank 6. The ultrasonic waves are transmitted to the treatment cylinder 3 through the water body, and ultrasonic treatment is performed on the methanol in the treatment cylinder 3. The dual action of ultrasonic waves on the treatment cylinder 3 greatly improves the ultrasonic effect, and the action of ultrasonic waves on the water body can improve the heat transfer in the water bath tank 6, ensuring uniform heating of methanol.

[0047] In order to enhance the purification effect of the filtering component 304, as Figure 6 shown, a plurality of second springs 304c evenly distributed along the circumference are provided between the inner cylinder 304a and the filtering cylinder 302. When the ultrasonic waves drive the treatment cylinder 3 to vibrate at high frequency, the second springs 304c vibrate at high frequency. The second springs 304c drive the inner cylinder 304a to vibrate, and the inner cylinder 304a drives the filter screen 304e inside to vibrate. By utilizing the strong vibrations and cavitation effect generated by ultrasonic waves, it helps the tiny particles or bubbles in methanol to disperse and mix better, improving the filtering efficiency and enhancing the filtering effect. At the same time, the vibration effect of ultrasonic waves helps to prevent the blockage of the filtering medium and extends the filtering cycle.

[0048] To enhance the heating effect of the heating component 305, as Figure 7 - Figure 8 shown, a plurality of third springs 305c evenly distributed along the circumference are provided between the heating plate 305b and the ring plate 305a and between adjacent heating plates 305b. When the ultrasonic wave drives the processing cylinder 3 to vibrate at a high frequency, the third spring 305c vibrates at a high frequency. The third spring 305c drives the heating plate 305b to vibrate, and the heating plate 305b drives the methanol thereon to vibrate, so that the methanol is more evenly mixed during the heating process, improving the heating uniformity and heating efficiency.

[0049] The above-described embodiments merely represent one implementation manner of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A methanol supply device for a methanol dual-fuel diesel engine, comprising a fuel rail (1) and a row of methanol injectors (2) which are equally spaced and inserted into the cylinders of the diesel engine below the fuel rail (1), characterized in that: A processing cylinder (3) for purifying and heating methanol is provided between the alcohol rail (1) and the methanol injector (2). An upper flexible connecting pipe (4) for connecting the two is provided between the top end of the processing cylinder (3) and the alcohol rail (1), and a lower flexible connecting pipe (5) for connecting the two is provided between the bottom end of the processing cylinder (3) and the methanol injector (2). It further includes a water bath tank (6) for heating the processing cylinder (3). The number of the processing cylinders (3) corresponds to the number of the methanol injectors (2) one by one, and the multiple processing cylinders (3) are evenly distributed along the circumference in the water bath tank (6). An ultrasonic component (7) for driving the processing cylinder (3) to vibrate at a high frequency is further provided in the water bath tank (6).

2. The methanol supply device of a methanol dual-fuel diesel engine according to claim 1, characterized in that: The upper flexible connecting pipe (4) is fixedly penetrated and fixed on the top surface of the water bath tank (6), and the lower flexible connecting pipe (5) is fixedly penetrated and fixed on the bottom surface of the water bath tank (6).

3. The methanol supply device of a methanol dual-fuel diesel engine according to claim 1, characterized in that: The processing cylinder (3) includes a vibrating cylinder body (301), a filtering cylinder body (302) located at the bottom end of the vibrating cylinder body (301) and threadedly connected thereto, and a heating cylinder body (303) located at the bottom end of the filtering cylinder body (302) and threadedly connected thereto. The lower end of the vibrating cylinder body (301) is located at the water surface of the water bath tank (6).

4. The methanol supply device of a methanol dual-fuel diesel engine according to claim 3, characterized in that: The ultrasonic component (7) includes an ultrasonic generator (701) fixed at the center of the water bath tank (6) and a ring body (704) fixed on the inner wall of the upper end of the water bath tank (6). A plurality of transmission frames (702) corresponding to the processing cylinders (3) one by one are provided around the ultrasonic generator (701), and the vibrating cylinder body (301) is located in the transmission frame (702) and abuts against it. Support plates (705) fixed on the ring body (704) are provided on both side surfaces of the transmission frame (702), and a first spring (703) is fixedly provided between the support plate (705) and the transmission frame (702).

5. The methanol supply device of a methanol dual-fuel diesel engine according to claim 4, characterized in that: The bottom end of the ultrasonic generator (701) is located below the water body in the water bath tank (6), and the top end of the ultrasonic generator (701) is located above the water surface of the water bath tank (6). Both the transmission frame (702) and the ring body (704) are located above the water surface of the water bath tank (6).

6. The methanol supply device of a methanol dual-fuel diesel engine according to claim 1, characterized in that: A plurality of heat pipes (601) evenly distributed along the circumference are embedded and fixed on the bottom surface of the water bath tank (6), and the bottom ends of the heat pipes (601) are inserted into the diesel engine cylinder. An auxiliary electric heating component is further provided in the water bath tank (6).

7. The methanol supply device of a methanol dual-fuel diesel engine according to claim 3, characterized in that: A filtering component (304) for purifying methanol is provided in the filtering cylinder body (302). The filtering component (304) includes an inner cylinder body (304a) and two first elastic rings (304b) fixedly sleeved at both ends of the inner cylinder body (304a). The first elastic ring (304b) is also fixed on the inner wall of the filtering cylinder body (302), and a plurality of second springs (304c) evenly distributed along the circumference are provided between the inner cylinder body (304a) and the filtering cylinder body (302).

8. The methanol supply device of a methanol dual-fuel diesel engine according to claim 7, characterized in that: A plurality of baffles (304d) are arranged at equal intervals and staggered inside the inner cylinder body (304a), and a filter screen (304e) is provided on the side of each baffle (304d).

9. The methanol supply device of a methanol dual-fuel diesel engine according to claim 3, characterized in that: A heating assembly (305) for heating methanol is provided inside the heating cylinder body (303). The heating assembly (305) includes two ring plates (305a) respectively fixed at two ends of the heating cylinder body (303) and a plurality of heating discs (305b) evenly distributed at equal intervals between the two ring plates (305a). A plurality of third springs (305c) evenly distributed along the circumference are provided between the heating disc (305b) and the ring plate (305a) and between adjacent heating discs (305b). A second elastic ring (305d) is fixedly provided between the heating disc (305b) and the heating cylinder body (303). A blanking hole (305e) for the methanol to flow down is provided on the heating disc (305b). A material guiding hopper (305f) for guiding the methanol to the center of the lower heating disc (305b) is provided at the bottom of the heating disc (305b).

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