CN206513437U - A kind of double fuel locomotive engine - Google Patents

Abstract

The utility model provides a dual-fuel locomotive engine, which comprises a fuel oil supply system, a gas supply system, an air intake system and a cylinder (9). The fuel supply system includes a fuel injection pump (21) connected by a pipeline and The fuel nozzle (20), the fuel nozzle (20) communicates with the working cavity of the cylinder (9), the air intake system communicates with the air inlet of the cylinder (9), and the gas supply system includes Gas injection valve (22) and gas nozzle (8), described gas nozzle (8) is communicated with cylinder (9) working cavity. The utility model can cancel the spark plug on the traditional locomotive engine, and by using gas to replace part of the fuel, it can also reduce the consumption of fuel accordingly, improve the replacement rate of fuel, not only can effectively reduce the operating cost of the locomotive engine, but also The emission pollution of the locomotive engine can be reduced, and the environmental protection level of the locomotive engine is improved.

Description

A dual-fuel locomotive engine

technical field

The utility model relates to the technical field of locomotive engines, in particular to a dual-fuel locomotive engine applied to high-power medium-speed locomotives.

Background technique

At present, the engines used on domestic high-power and medium-speed locomotives are all fueled by diesel oil. The locomotives are pulled by using diesel engines completely, so that the operating costs of the locomotives remain high; at the same time, due to the use of fuel power Emission pollution is also subject to increasingly strict restrictions. Therefore, on the basis of meeting the requirements of locomotives for traction power, how to effectively reduce the locomotive traction cost and reduce emission pollution has become an increasingly urgent realistic demand.

Utility model content

The technical problem to be solved by the utility model is to provide a dual-fuel locomotive engine to reduce the operating cost and emission pollution of the locomotive engine in view of the problems existing in the prior art.

The technical problem to be solved by the utility model is achieved by the following technical solutions: a dual-fuel locomotive engine, including a fuel oil supply system, an air intake system, a gas supply system and a cylinder, and the fuel oil supply system includes a pipeline The connected fuel injection pump and fuel nozzle, the fuel nozzle communicates with the working cavity of the cylinder, the air intake system communicates with the cylinder intake passage, and the gas supply system includes a gas injection valve and a gas nozzle connected by pipelines , the gas nozzle communicates with the working cavity of the cylinder.

Preferably, it also includes a governor and an actuator, the governor is electrically connected to the actuator, and the actuator is electrically connected to the fuel injection pump.

Preferably, the gas supply system further includes a gas controller, and the gas controller is electrically connected to the governor and the gas injection valve respectively.

Preferably, an exhaust explosion-proof system is also included, the exhaust explosion-proof system includes a holder, an explosion-proof cover and an exhaust explosion-proof cylinder, a bursting disc is fixedly installed on the holder, and the explosion-proof cover and the exhaust explosion-proof cylinder are composed It has a movable connection structure, and the explosion-proof cover is opened or closed relative to the outlet of the exhaust explosion-proof cylinder, the inlet of the clamper communicates with the total exhaust pipe of the engine, and the outlet of the clamper communicates with the exhaust explosion-proof cylinder.

Preferably, the air intake system includes a supercharger and an intercooler connected by pipelines, the supercharger communicates with the air intake pipe, and the intercooler communicates with the cylinder intake passage.

Preferably, a turbine turbine tee pipe is also included, and the turbine turbine tee pipe communicates with the supercharger, the clamper inlet, and the total exhaust pipe outlet respectively.

Preferably, the air intake system further includes a surge tank, and the surge tank communicates with the intercooler and the cylinder intake duct respectively.

Preferably, the fuel supply system further includes a fine fuel filter, and the outlet of the fine fuel filter communicates with the inlet of the fuel injection pump.

Compared with the prior art, the beneficial effect of the utility model is that the fuel oil and the air are respectively delivered to the cylinder through the fuel oil supply system and the air intake system, and the fuel oil and the air are mixed in the internal cavity of the cylinder, and are pressed by the piston Combustion of fuel oil, after the gas is pressed into the working cavity of the cylinder through the gas supply system, the gas can be ignited by the compression-ignited fuel oil, so as to realize the co-combustion of fuel oil and gas, and make the engine do work externally. The spark plug ignites fuel oil and gas, so that the spark plug on the traditional locomotive engine can be canceled, and because gas can be used to replace part of the fuel, the consumption of fuel and fuel is reduced accordingly, and the replacement rate of fuel is increased, so that it can effectively The operating cost of the locomotive engine is reduced, the emission pollution of the locomotive engine is also reduced, and the environmental protection level of the locomotive engine is improved.

Description of drawings

Fig. 1 is a structural schematic diagram of a dual-fuel locomotive engine of the present invention.

Fig. 2 is a sectional view of a dual-fuel locomotive engine of the present invention.

Fig. 3 is a structural schematic diagram of a gas system of a dual-fuel locomotive engine of the present invention.

Marks in the figure: 1-body assembly, 2-total exhaust pipe, 3-turbine turbine tee pipe, 4-holder, 5-explosion-proof cover, 6-exhaust explosion-proof cylinder, 7-supercharger, 8-Gas nozzle, 9-Cylinder, 10-Gas intake manifold, 11-Fuel fine filter, 12-Control rod, 13-Cable, 14-Actuator, 15-Gas controller, 16-Governor, 17- Fuel pipeline, 18-air intake pipe, 19-intercooler, 20-fuel nozzle, 21-fuel injection pump, 22-gas injection valve, 23-bellows, 24-support frame.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

The dual-fuel locomotive engine shown in Figure 1 and Figure 2 mainly includes a body assembly 1, a fuel supply system, an air intake system, a gas supply system, an engine electrical system and a cylinder 9, the fuel supply system Including a fuel fine filter 11, a fuel injection pump 21 and a fuel nozzle 20, the outlet of the fuel fine filter 11 communicates with the inlet of the fuel injection pump 21 through the fuel pipeline 17, and the fuel injection pump 21 communicates with the fuel nozzle 20 through a pipeline connection , the ejection port of the fuel nozzle 20 communicates with the working cavity of the cylinder 9 . The air intake system includes a supercharger 7, an intercooler 19 and a surge tank, the supercharger 7 communicates with the air intake pipe 18 through a pipeline connection, and the intercooler 19 is respectively connected to the supercharger 7, the cylinder 9 intake port is connected; preferably, between the intercooler 19 and the cylinder 9, a surge tank can be added, and the pressure stabilizer box passes through the intercooler 19 and the cylinder 9 intake port respectively. The pipes are connected.

As shown in Figure 3, the gas supply system includes a gas intake manifold 10, a gas injection valve 22 and a gas nozzle 8, the gas intake manifold 10 is fixedly installed on a support frame 24, and the support frame 24 Fixedly connected to the body assembly 1, the gas injection valve 22 communicates with the gas inlet main pipe 10 and the gas nozzle 8 through pipeline connections, and the gas nozzle 8 communicates with the working cavity of the cylinder 9. In order to improve the safety of the dual-fuel locomotive engine, the multi-point injection technology of the intake branch pipe is adopted, so that there is no combustible gas in the components in the intake system such as the supercharger 7, the intercooler 19, and the surge tank. Preferably, a corrugated pipe 23 may be provided in the connecting pipeline between the gas intake main pipe 10 and the gas injection valve 22, so as to improve the working stability and reliability of the gas supply system.

The engine electrical system can continuously collect and monitor multiple key parameters such as engine speed, temperature, and pressure in real time, and issue commands such as alarm, load reduction, and shutdown according to different overruns or failures.

When the above-mentioned dual-fuel locomotive engine is running, the fuel is first filtered through the fine fuel filter 11, and then pressed into the working cavity of the cylinder 9 through the fuel injection pump 21 and the fuel nozzle 20, and the external air flows through the supercharger 7, the middle After the cooler 19 and the surge tank enter the intake port of the cylinder 9, the fuel and air are mixed with each other in the working cavity of the cylinder 9, and then the fuel is compressed and ignited by the movement of the piston; After the fuel gas is pressed into the working cavity, the gas can be ignited by the compression-ignited fuel oil, thereby realizing the co-combustion of the fuel oil and the gas, so that the engine can perform external work. Since there is no need for a spark plug to ignite fuel and gas during the work of the engine, the spark plug on the traditional locomotive engine can be eliminated; at the same time, because gas can be used to replace part of the fuel, the consumption of fuel and fuel can be correspondingly reduced and improved. The replacement rate of fuel oil is improved, the operating cost of the locomotive engine is effectively reduced, and the emission pollution of the locomotive engine is also reduced.

Further, the fuel injection pump 21 is electrically connected to the actuator 14 on the engine, the actuator 14 is electrically connected to the governor 16 on the engine through a cable 13, and the actuator 14 is connected to the control rod 12, and The action of the fuel injection pump 21 is controlled by the control rod 12; the governor 16 is electrically connected to the gas controller 15 through the cable 13, and at the same time, the gas controller 15 is electrically connected to the gas injection valve 22 . The accelerator position signal is sent to the actuator 14 and the gas controller 15 through the governor 16, and the actuator 14 regulates the action of the fuel injection pump 21 through the control rod 12, so that the fuel injection quantity can be adjusted. The gas intake is precisely controlled by the gas injection valve 22 to reduce the residence time of the gas in the engine.

Therefore, the dual-fuel locomotive engine of the utility model can work in the diesel mode and the dual-fuel mode respectively, and can switch between the two modes conveniently. When a sudden change in load occurs, the engine can automatically switch back to diesel mode for quick response, maintaining the same dynamic characteristics as the original diesel engine; when it reaches a new stable operating state, the engine automatically switches back to dual-fuel mode, in which, the engine's The speed stabilization and adjustment are realized by the governor 16 controlling the injection quantity of diesel, and the gas controller 15 only controls the substitution quantity of gas, and does not participate in the speed regulation and load response of the engine.

In order to further enhance the operational safety of the above-mentioned dual-fuel locomotive engine, an exhaust explosion-proof system can be added, and the exhaust explosion-proof system is shown in Figure 1, including a turbine turbine tee pipe 3, a holder 4, an explosion-proof The cover 5 and the exhaust explosion-proof cylinder 6, the holder 4 is fixedly equipped with a burst disc, and the explosion-proof cover 5 and the exhaust explosion-proof cylinder 6 form a movable connection structure through a hinged manner, so that the explosion-proof cover 5 can Open or close relative to the outlet port of the exhaust explosion-proof cylinder 6. The turbine turbine tee pipe 3 communicates with the outlet of the supercharger 7, the holder 4 inlet, and the total exhaust pipe 2 of the engine respectively, and the outlet of the holder 4 communicates with the exhaust explosion-proof cylinder 6. The holder 4 inlet communicates with the total exhaust pipe 2 of the engine. When there is a serious failure of the engine and the pressure in the cylinder 9 is suddenly increased or the pressure is abnormally increased, when the discharged high-pressure and high-temperature gas passes through the turbine turbine tee pipe 3, if the gas pressure exceeds the pressure in the holder 4 When the bursting disc is under pressure, the bursting disc fails, and the explosion-proof cover 5 is opened relative to the exhaust explosion-proof cylinder 6, and the high-temperature and high-pressure gas is released through the exhaust explosion-proof cylinder 6, so as to quickly and timely relieve the pressure of the exhaust system, and At the same time, the alarm signal is output to the engine control system, and the control system performs operations such as cutting off gas, reducing load, reducing speed, and stopping, so as to effectively prevent the expansion of accidents.

The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. It should be pointed out that any modification, equivalent replacement and improvement made within the spirit and principles of the utility model, etc., All should be included within the protection scope of the present utility model.

Claims (8)

1. a dual-fuel locomotive engine, comprising a fuel oil supply system, an air intake system and a cylinder (9), said fuel oil supply system comprising a fuel injection pump (21) and a fuel injection nozzle (20) connected by a pipeline, so The fuel nozzle (20) communicates with the working inner cavity of the cylinder (9), and the air intake system communicates with the air inlet of the cylinder (9), and is characterized in that it also includes a gas supply system, and the gas supply system includes The gas injection valve (22) and the gas nozzle (8) connected by the pipeline, the gas nozzle (8) communicates with the working cavity of the cylinder (9). 2. A kind of dual fuel locomotive engine according to claim 1, is characterized in that: also comprise governor (16) and actuator (14), described governor (16) and actuator (14) electric The actuator (14) is electrically connected with the fuel injection pump (21). 3. A kind of dual-fuel locomotive engine according to claim 2, characterized in that: the gas supply system also includes a gas controller (15), and the gas controller (15) is connected with the governor ( 16), the gas injection valve (22) is electrically connected. 4. A kind of dual-fuel locomotive engine according to any one of claims 1-3, characterized in that: it also includes an exhaust explosion-proof system, and the exhaust explosion-proof system includes a holder (4), an explosion-proof cover (5 ) and the exhaust explosion-proof cylinder (6), the rupture disc is fixedly installed on the holder (4), the explosion-proof cover (5) and the exhaust explosion-proof cylinder (6) form a movable connection structure, and the explosion-proof cover (5) Open or close relative to the outlet of the exhaust explosion-proof cylinder (6), the inlet of the holder (4) communicates with the total exhaust pipe (2) of the engine, and the outlet of the holder (4) communicates with the exhaust explosion-proof cylinder (6) ) are connected. 5. A kind of dual-fuel locomotive engine according to any one of claims 1-3, characterized in that: said air intake system comprises a supercharger (7) and an intercooler (19) connected by pipelines ), the supercharger (7) communicates with the air intake pipe (18), and the intercooler (19) communicates with the cylinder (9) inlet. 6. a kind of dual-fuel locomotive engine according to claim 5, is characterized in that: also comprise turbine turbine three-way pipe (3), described turbine turbine three-way pipe (3) is connected with supercharger ( 7), the inlet of the holder (4) and the outlet of the total exhaust pipe (2) are connected. 7. A kind of dual-fuel locomotive engine according to claim 5, characterized in that: the air intake system also includes a surge tank, and the surge tank is respectively connected to the intercooler (19), the cylinder (9 ) The air inlets are connected. 8. A kind of dual-fuel locomotive engine according to any one of claims 1-3, characterized in that: the fuel oil supply system also includes a fuel fine filter (11), and the fuel fine filter (11) The outlet communicates with the inlet of the fuel injection pump (21).