DF8BJ type internal combustion locomotive is AC drive six-axle mainline freight internal combustion locomotive, is the capital machine company and Zhuzhou Institute of joint development, by the capital machine company design and manufacture of AC drive mainline freight internal combustion locomotive. The locomotive has a rated power of 3710kW, wheel diameter of 1050mm axle Co-Co, 25t axle weight, maximum running speed of 120km/h, maximum starting traction force of 560kN, sustained traction force of 410kN, constant power speed range of 22~110km/h, sustained speed of 28.8km/h, and a minimum curve radius of 145m. 16V280ZJG type EFI diesel engine, the maximum operating power of 4000kW (5500hp). DF8BJ type internal combustion locomotive developed in 2001, *** production of 1, car number 0001. 2002 in Zhengzhou, a fixed traction packages in the north of Shangqiu Express. 2006 to complete the prototype assessment of the dismantling and inspection, restoration of the placement of capital machine company.
2. The overall DF8BJ internal combustion locomotive is an internal corridor, truss-type side wall bearing structure. The upper part of the car is divided into 6 rooms by 5 partition walls, which are I-end driver's room, electrical room, power room, cooling room, auxiliary room, and II-end driver's room; the lower part of the car is the fuel tank, battery box, and two interchangeable three-axle bogies. The two driver's cabins have the same maneuvering function, the equipment layout is basically the same, with a driver and deputy driver console, the driver and deputy driver seats, the driver's console is installed with the driver's controller, the brake device automatic brake valve and individual brake valve, a variety of manipulation buttons, instrumentation and signal display devices, etc., but also has a heater, electric fans, electric stoves, etc., electrical room is installed in the braking resistor cabinets, electrical cabinets, traction converter cabinets, three equipment and tool box. The starting gearbox of the auxiliary drive is connected with the starting generator and the ventilator of the front bogie traction motor. The valve mounting bracket and the three equipment and tool cabinets are located on the rear wall of the electrical room. Electrical cabinet is installed in the driver's room at the back wall, in the driver's room can be on the electrical cabinet for maintenance, traction converter cabinet is installed in the starter generator and electrical cabinet between the power room is mainly installed in the diesel engine, traction generator set and for it to serve the air filter, fuel filter, fuel transfer pump, auxiliary lubricating oil pumps, the cooling water system pipelines and valves, expansion tanks and so on. Sidewalls are equipped with a body ventilator, used to discharge the cooling chamber is equipped with a radiator set, cooling fan, hydrostatic motor. Radiator group is equipped with hydrostatic gearbox in the lower part, after the indoor smoke bogie traction motor ventilator, lubricating oil filter, lubricating oil heat exchanger, air compressor, etc. Auxiliary indoor left example for the preheating boiler circulating water pump, the right side for the preheating boiler. The left side of the front wall is equipped with a wind source purification device (double tower type). There is an escalator on the left side of the back wall that leads to the roof, and a preheating boiler control box on the right side. Lower center with a hand brake transmission device, the lower two sides of the re-railers, the lower center of the frame suspended fuel tanks, fuel tanks on both sides of the battery packs, front and rear ends are equipped with a total wind cylinder auxiliary transmission device mainly by mechanical transmission, hydrostatic transmission and DC motor drive three forms of components. Mechanical transmission device by the universal shaft, start gearbox, drive shaft and rear gearbox and their input shaft, output shaft and coupling components. The hydrostatic gearbox is driven by the crankshaft at the free end of the diesel engine, which is connected by a drive shaft. The rear gearbox has three output shafts, two of which drive two hydrostatic pumps of identical structure, and the other drives the rear ventilator through a polyamide rope drive shaft. The cooling fan is driven by a hydrostatic motor, which realizes stepless speed change and automatic control.
3. Traction electric drive system
(1)The main drive system of DF8BJ internal combustion locomotive includes rectifier, three-phase traction inverter module, resistance braking device and over-voltage chopper switching module, all kinds of voltage and current sensors, input contactors, etc. The traction circuit includes the power supply circuit of the traction generator to the traction motor, the protection circuit of the traction circuit and measurement circuit and the excitation circuit of the traction generator. The traction circuit includes the power supply circuit from the traction generator to the traction motor, the protection circuit and measurement circuit of the traction circuit and the excitation circuit of the traction generator. The AC traction drive system of the locomotive adopts the bogie control mode. The armature of the traction generator is a double winding, two sets of three-phase alternating current issued by the winding, respectively, through the two sets of independent traction rectifier unit into high-voltage direct current, high-voltage direct current and then through the traction inverter inverter into three-phase alternating current for a bogie on the three parallel traction motor power supply, the locomotive is equipped with two sets of resistive braking unit, respectively, parallel in the intermediate DC circuit of the two sets of traction inverters.
(2) traction generator and shaft-assisted generator locomotive TQFR-4000 three-phase AC brushless excitation synchronous traction generator, traction generator stator stellar double-winding structure, rated power of 4000kV?A, rated voltage of 2030V, rated current 2X570A, rated speed speed into a positive locomotive ZQF413 starter generator, rated power of 90kW, rated voltage of 2030V, rated current of 2X570A, the locomotive used ZQF413 starter generator. Rated power 90kW, rated voltage 110V, rated speed 1078 ~ 1,000 r/min rate 150Hz2728r/min. In the start of the diesel engine, the motor for the series-excited motor operation, that is, the starter winding works, powered by the battery, due to the series-excited, the motor turned to diesel engine traction, into a generator run by its excitation, regulated by the voltage regulator output of 110V constant direct Winding resistance is very small, start the instantaneous current is very large, on the shaft can produce a large enough torque to make the diesel engine start. When the diesel engine start traction converter has a rectifier and traction inverter composition. Traction inverter using 3000A / 4500VGTO device.
(3) traction converter power module of the traction inverter using half-bridge circuit, by the upper and lower arms of the two GTO switching elements and its triangular absorption circuit and anti-parallel diodes. Traction inverter control cabinet, cooling system (except heat exchanger) are placed in an electrical cabinet.
(4)The locomotive adopts D120 AC traction motor with rated power of 50kW, rated voltage of 1,288V, rated current of 280A and maximum current of 386A, rated speed of 889r/min and maximum speed of 3,546r/min, and the cooling method adopts the strong chasing air-cooling, and the ventilation amount of each traction motor is 88m2/min.
() 5) resistance braking device locomotive using two sets of horizontal braking resistor unit mounted on a mounting frame, two sets of resistance braking respectively through two new wave branch circuit and the middle of the DC circuit connected to the rated power of 2 × 1900kW, rated voltage of 2600V, the ventilator is driven by DC motors, the power supply by the braking resistor taps supply.
4. Auxiliary electrical system
DF8BJ type internal combustion locomotive auxiliary circuit includes starter generator power circuit, battery charging circuit, fixed power generation circuit, body ventilator circuit, air compressor starting circuit and other control circuits control circuits include locomotive power supply circuits, diesel engine starting circuits, locomotive operating circuits and control circuits protection circuits, lighting circuits and signal circuits, traveling safety circuits. signaling circuits, driving safety circuits, electronic injection control circuits and preheating boiler control circuits.
5. Microcomputer network control system
DF8BJ type internal combustion locomotive microcomputer excitation regulator through the control of the excitation system of the excitation current, so that the output current, voltage and power of the traction generator in the prescribed range, and with the EFI system, so that the diesel engine constant power operation. It can control the traction generator current so that it has the best growth rate, so that the locomotive has good traction start and acceleration performance.
6. Body
The body of DF8BJ internal combustion locomotive consists of two major parts: the steel structure of the body and the body equipment. The body adopts truss-type side wall bearing, and its steel structure mainly consists of the upper two ends of the compartment, side walls, roof, partition wall welded into a whole all-steel welded structure, and the lower part of the chassis, the end of the lower skeleton, the baffle, traction buffer device. The main load-carrying components are made of Q345C low alloy steel, the vertical load of the car body is borne by the frame and the sidewalls *** with the main load-carrying rods are made of box-type structure, the hooks are made of the internal combustion and electric locomotives with lower-acting hooks according to the standard of TB/T1595, and the buffer is made of the buffer of the MT-3 type. 7. Bogie DF8BJ type internal combustion locomotive running part is two interchangeable three-axle bogie, no center disk, no guide frame, tie rod axle box positioning, bogie mainly consists of frame, wheelset, axle box, bypass bearings, traction device, motor suspension and basic braking device and so on. The axlebox is a rolling bearing axlebox with elastic tie-rod positioning, and the suspension of the bogie consists of springs on both sides of the axlebox and vibration dampers installed at the end of the axlebox. Bogie two system suspension device by each bogie four rubber side bearing composition, support the locomotive upper mass, bogie fruit take the lead device is a four-bar mechanism, so that the bogie and the body connected together, speed traction and braking force. The traction motor adopts the axle suspension type, one end of the motor is suspended on the axle through the bearing, and the other end is suspended on the bogie frame through the elastic boom. The locomotive's basic braking device adopts one set of single-side single-tile road braking device for each wheel, and it has an automatic adjuster for the original between the unwinding tiles.
8. Braking system
DF8BJ type internal combustion locomotive air system by the air brake device and axle with wind device two parts, the air brake device by the locomotive air source system and JZ-7 air brake machine is composed of the JZ-7 air brake machine is mainly composed of automatic braking valve, separate brake valve, equalization of the air cylinder, relay valve, overfill air cylinder, distribution valves, the role of the read, Variable reading, dust filter check valve, emergency brake reading, etc. There are two NPT5-type air compressors for air supply.
9. Diesel engine
DF8BJ-type internal combustion locomotives are equipped with 16V2802ZJG diesel engine. Diesel engine body for the casting structure, cylinder arrangement V-shaped 50 ° angle, four-stroke, electronic fuel injection, direct injection combustion chamber, exhaust gas turbocharging, pressurized air intercooling, the use of high-strength forged steel crankshaft, side-by-side connecting rods, cylinder diameter of 280mm, the piston stroke of 285mm, the number of cylinders 16, the calibrated speed of 1,000/min, the minimum no-load speed of 400r/min, the calibrated power auxiliary system includes fuel system, lubrication system, the power of the engine, the power of the engine, the fuel system, the lubrication system, the power of the engine, the fuel system, the fuel system, the fuel system, the lubrication system. Power auxiliary system including fuel system, lubricating oil, cooling water, preheating, air filtration system and traction motor ventilation system 4200kW, loaded power 4000kW fuel system by the diesel fuel system and diesel engine other than the locomotive fuel system consists of two parts, is set up for the supply of diesel engines and preheating the boiler fuel oil, the locomotive fuel system by the fuel tank, fuel roughness filter, fuel Locomotive fuel system consists of fuel tank, fuel coarse filter, fuel transfer pump, fuel preheater, safety valve, check valve and shut-off valve, instrumentation and pipe fittings, and with the diesel fuel system of the head and tail, constituting the entire locomotive unified circulatory system. Diesel fuel system includes fuel fine filter, low-pressure fuel pipeline, fuel injection, high-pressure fuel pipeline, fuel injector, electronic injection control system, pressure limiting valve and injection pump and fuel injector return pipeline system. The system is equipped with two parallel fuel delivery elephants, which can work at the same time or separately, and the fuel coarse filter is RC-40W type screen packing type. The fuel transfer pump is an external gear oil pump, driven by DC motor. Fuel preheater adopts oil and water heat transfer, using hot water to cool the diesel engine to heat the fuel to ensure the quality of fuel atomization lubrication system by the locomotive lubricating oil system and diesel engine lubricating oil system *** with the composition of a complete lubricating oil circulation system. Locomotive lubricating oil system mainly consists of lubricating oil filter, lubricating oil heat exchanger, start lubricating oil pumps, as well as valves, piping and instrumentation, to ensure that the diesel engine to supply a certain pressure, temperature and capacity of clean lubricating oil: diesel lubricating oil system by the diesel engine sump, the main lubricating oil pumps, lubricating oil filter, lubricating oil heat exchanger, lubricating oil filter, lubricating oil inside the lubrication and cooling premises, piping and so on. Composition of the cooling water system is divided into high and low temperature cooling system. The main components are expansion tank, cooling water pump, air cooler (intercooler), lubricating oil heat exchanger, radiator, cooling fan, hydrostatic oil heat exchanger and backstop, piping and so on. High-temperature water system uses water to directly cool the parts that are in direct contact with gas, such as cylinder liner, cylinder head and turbocharger shell; low-temperature water system cools the lubricating oil through lubricating oil heat exchanger, and cools the pressurized air through air cooler (intercooler). Radiator using copper tube rib type, V-shaped mounted on the cooling chamber of the steel skeleton, **** 54 groups. High and low temperature cooling water system each has a fan high and low temperature cooling water pump are centrifugal composition. Preheating system by the spiral tube preheating boiler, fuel pumps, water pumps, wind group, fuel injection ignition device and electronic control equipment air filtration system for the four-stage filtration, the first level for the anti-sand mesh, the main filtering out the air in the quality of the larger impurities; the second level of inertial air filters; the third level for the paper fine filter; the fourth level for the aluminum mesh filters. Filter elements are installed in the filter housing. Two sets of air filtration devices were installed in the locomotive powerhouse body on the left and right side wall, the front and rear of the two supercharger intake air filtering. Traction motor ventilation system *** set up two traction motor ventilation with a blower, is the forward blade type centrifugal ventilator, respectively, by the diesel engine through the front and rear gearbox output shafts and driven by nylon rope for the front and rear of the locomotive bogie ventilation of the three traction motors.