The specific embodiment
The invention will be further described below in conjunction with accompanying drawing and embodiment.
As Fig. 1 to a kind of low-axis-load large-power AC transmission freight diesel locomotive shown in Figure 12, locomotive divides upper and lower two parts, top is car body 38, car body is provided with five road partitions, partition 1, partition 2 13, partition 3 24, partition 4 32, partition 5 34, car body is divided into six chambers, and turning left from the right side is followed successively by I driver's cab 8, electric panel room 10, power room 23, cooling room 25, ancillary chamber 33, II driver's cab 35.The main layout of each chamber is:
I driver's cab and II driver's cab:
The layout of I driver's cab 8 and II driver's cab 35 is basic identical, and the handgrip of hand brake device 39 only is set on the partition 5 34 of II driver's cab.
Driver's cab free from worry bright, the visual field good, be convenient to watch from a height or a distance.Front screen adopts double glazing, and side window adopts the aluminum alloy window frame, forward and backward moving.
Settled whole driving and information control apparatus on the operating console 54, the left side is that main driver's desk, right side are assistant driver's desk.Console structure and equipment installation site are according to the ergonomics principle design, positive driver's side is furnished with brake activation valve, control handle, reversing handle, master cock, button, instrument, fault centralized displaying screen, LJK2000 operation monitoring telltale and computer display, and secondary driver's side is provided with information control apparatus, household electricity stoves such as master cock.
In order to improve the bus attendant service conditions, be provided with space heating apparatus in the driver's cab.In addition, also be provided with roof-mounted air-condition 1, make bus attendant work in summer more comfortable.
Heat insulation, the body insulation of wall filling around indoor makes it form the hermetically-sealed construction of heat insulation a, sound insulation, makes room noise reach the requirement of GB3450 regulation.
The top is provided with top ceiling, is mounted with illuminating lamp and electric fan on it.
In addition, also be provided with facilities such as emergency vent valve, fire extinguisher plant on the partition of driver's cab rear.The double glazing of front window can be selected electric heating glass for use according to customer requirements.The front window bottom is provided with windshield wiper and glass automatic washer, and is bright with the cleaning that keeps front screen.
Electric panel room:
Electric panel room 10 left sides are traction current transformation cabinet 12, its inside comprises main rectifier cabinet, and carries water-cooling system, axle prosecutor formula, traction current transformation cabinet 12 tops are to be the set aluminum external air inlet air flue 14 of its cooling, and cooling air is discharged to the car body bottom behind traction current transformation cabinet 12.Rear portion, electric panel room right side is an Electric Appliance Cabinet 11, and its inside comprises low-voltage electrical apparatus, contactless switch, locomotive level microcomputer, traffic safety device etc.On the Electric Appliance Cabinet sidewall at microcomputer case EXP layout place, be provided with miniature forced ventilation fan, go out on advancing down, in order to cooling microcomputer case.
Electric panel room front end top is two horizontal braking resistors 7, and its erecting frame is designed to the structure of integral hoisting, so that the lifting of traction convertor, Electric Appliance Cabinet.
Partition 2 13 upper right side at electric panel room 10 and power room 23 are provided with forecarriage traction electric machine fan motor group, its exhaust passage and partition 2 13 are integrated, also can provide positive draft simultaneously, for each electrical equipment in the electric panel room 10 is created good working environment to electric panel room 10.This layout of this ventilating set can make full use of the locomotive upper space, and shortens the locomotive longitudinal length.
Electric panel room 10 left side walls are provided with the louver of band filter screen, are beneficial to the heat radiation in summer.
Power room:
The middle part is the diesel power generation unit in the power room 23, and diesel engine 4 is the R16V280ZJ type, and main generator 5 is the JF222 type, brushless excitation, and adopt the self-ventilation mode.Main generator 5 is from the air draught of car body bottom, and behind the cooling main generator 5, a part of row is outside car, and another part comes power room 23 inside, makes power room set up certain malleation, is beneficial to the normal operation of diesel engine 4.
Main generator 5 links to each other with the DC starting generator that exchanges auxiliary generator 51, right side 16 in left side respectively by versatile spindle 15, front gear box.
Diesel power generation unit right side is provided with the work reservoir in fuel preheater, the Pneumatic brake systems, and the left side is provided with two groups of fuel feed pump-group of motors, fuel prefilter, and left back end is established the fuel oil micronic filter.
Power room 23 left and right sides wall front ends be equipped with the band filter screen louver, can as the door open so that the maintenance in tool for transmitting and the replacing parts.Both sides, power room 23 middle part are equipped with pressure-increasing air purifier 20, and top, right side wall rear portion is provided with two trolley body ventilating sets.
Preceding partition 2 13 is provided with air purification unit 19, auxiliary generator excitation control cabinet 17, and the top is the aluminum external air inlet passage 14 of forecarriage traction electric machine ventilating set 6.
Back partition 3 24 middle parts are the water tank 45 that runs through the dry cooling systems of power room 23 and cooling room 25 partitions 3 24, are furnished with measuring device 4 on it.These water tank 45 double partition functions.
Cooling room:
Cooling room 25 tops are cooling mechanism, and its top is overhead type radiator 28, and the bottom is 26 groups of two cooling fan 27-electrical motors.
Cooling mechanism lower front end left side is board-like lubricating oil heat exchanger 43, and the centre is a water tank 45, and the right side is starting lubricating oil pump 29, chemical fibre lubricating oil filter 30.
Cooling mechanism is provided with two air compressor group of motors 42 in the middle of the below, and Air compressor is a TSA-330A type screw pump, joins ZD319A type DC motor.
Left side, rear end, cooling mechanism below is a trailing truck traction motor blower 41-group of motors, from ancillary chamber 33 air draughts.The right side is the board-like erecting frame 31 of brake valve class.
Partition 4 32 left sides, cooling room 25 back are provided with rail rail lubricating system control capsule, and the centre is the electric emergency vent valve of traffic safety device.
Establish 6 side louvers on cooling room 25 two sides altogether, its first half can be according to cooling water temperature and self-opening, close, and adopts the pneumatic reservoir of solenoid control to drive the temperature control mechanism of louver again.
Ancillary chamber:
Ancillary chamber 33 is provided with air-conditioning unit inverter 2 and control box, diesel engine EFI control box 37 and locomotive interface box thereof, rerailer 40, aluminum tool box and climbs up staircase 36 of roof etc.
The side louver is established in ancillary chamber 33 two sides, for 41 groups of air draughts of trailing truck traction motor blower motor.
Mainly be provided with following system on the locomotive:
Driving system:
Driving system comprises the main transmission accessory drive system of unifying.
The locomotive main transmission adopts hands over the orthogonal electric tramsmission, and axle prosecutor formula mainly is made up of main alternator 5, main converter and traction convertor (being made of one), alternating current asynchronous traction electric machine 49 and braking resistor 7 etc.Main generator unit stator is the double star winding, output two-way three plase alternating current, each road is rectified into stable middle dc voltage by a three phase full wave rectification bridge with three plase alternating current, be transformed into the three plase alternating current of voltage magnitude, frequency adjustable again through three groups of traction convertors, supply with three alternating current asynchronous traction motors 49 on the bogie truck 53 respectively, realize the variable voltage variable frequency speed governing of electrical motor, thus the speed and the tractive force of control locomotive.
Locomotive adopts distributed computer control system; functions such as detection, protection and trouble diagnosing demonstration with locomotive traction and rheostatic brake control, load control certainly, adhesion control and subsidiary engine alternating current transmission control, each system of locomotive make locomotive in traction, rheostatic brake with all be in optimum regime work under the various operating modes such as load certainly.Microprocessor control system has more perfect diagnosis, Presentation Function, and data are carried out automatic record before and after fault can being taken place, and can pass through the IC-card dump, for analysis.Microcomputer system adopts MVB to control fiber buss, reliable communications in real time.Locomotive level microcomputer system adopts the two-shipper cold spare, can switch to another microcomputer system by a change-over swith during fault and work on, to improve the locomotive work reliability.
Main generator 5 is the JF222 type, and rated capacity 4200kVA adopts self-ventilation brushless excitation mode, has saved the ventilating set, exciting dynamo and the excitation rectifier cabinet that add.Main generator 5 adopts three-phase salient pole type brushless excitation synchronous main alternator, establish the excitation winding of main generator and the three phase armature winding of exciting dynamo on the rotor of electrical generator, the exciting dynamo output voltage is through being arranged on the excitation winding power supply of same epitrochanterian rotary rectifier to main generator 5, and the excitation winding of exciting dynamo then is located on the stator of main generator.Exciting current is regulated the 110V direct current (DC) by locomotive control level microcomputer and is supplied with through copped wave, control the output voltage of main generator by regulating exciting current, thus the control middle dc voltage.Middle dc voltage rises by the linear changing relation with the rising of diesel engine speed, and the relation curve of voltage and rotating speed is a zero passage straight line, and the middle dc voltage of corresponding diesel engine speed 1000r/min is 1500V.
The product of traction convertor Switzerland BOMBARDIR company, adopt axle prosecutor formula, its inside also comprises main rectifier cabinet, main rectifier cell model is ZPA2000-44, converter module adopts IGBT (3300V/1200A) element, two kinds of elements all adopt water-cooling pattern, carry cooling-water cycle and fan cooling system in the cabinet, only need provide the external air inlet air flue to get final product.Main rectifier cell is provided by the Zhuzhou, and converter module is then general with subway, for condition has been created in current transformer production domesticization later on.
Traction motor is the phase asynchronous traction motor of JD123 type, with respect to traditional DC traction motor, have a series of significant advantage such as power is big, adhesive performance good, maintenance capacity is few, improved the tractive property of locomotive greatly, adhesion factor reaches 0.38, and maximum starting tractive effort reaches 560kN, Daheng merit speed reaches 120km/h; Simultaneously, because its weight has only 1800kg, every the light approximately 1200kg of ZD109C type DC traction motor than east wind 8B helps reducing the locomotive unsprung weight, reduces the wheel track action firmly, and this is particularly important to high power AC transmission locomotive.
Locomotive is established rheostatic brake, and with the braking resistor input, braking resistor 7 is established two groups to glancing impact, horizontal installation by current transformer control.Maximum power 2 * 2050kW can satisfy from loading test requirements document.Under the rheostatic brake operating mode, all B.P.s of the wheel of locomotive are about 3600kW, and the locomotive maximum braking force is 220kN.
Because main gear has adopted friendship orthogonal system, except that current transformer, there is not any High-Voltage Electrical Appliances, so electric elements are according to the principle of centralized arrangement, be about to low-voltage electrical apparatus, contactless switch, locomotive level microcomputer, traffic safety device etc. and be arranged in the Electric Appliance Cabinet 11 compact in design.Advance and reliability are considered in selecting for use of components and parts as far as possible, select for use as direct solenoid contactless switch and intermediate relay and to introduce " the Sha Ertebao electrical equipment " that German Sha Ertebao technology is produced, AC contactor adopts " the strange bt appliance " of Australian CLIPSAL company cooperative production.
Diesel engine 4 adopts the electron spraying system of pump-pipe-mouth patterns, and control system adopts the controller of the MVC01-10/20 of German Heinzmann company, and automatically controlled pump is the product of Austrian Bosch company.This system have oil spout control accurately, the diesel engine slow speed of revolution stablizes, helps advantages such as environmental protection.
Locomotive control and lighting circuit employing 110V direct supply, the machine that rises is preceding by being powered by DC starting generator 16 behind locomotive storage batteries 47 power supplies, the machine.
The locomotive accessory drives adopts mechanical drive, the transmission of subsidiary engine alternating current, three kinds of forms of subsidiary engine direct current (DC) transmission, rear transmission gear box habitual on the AC-to-DC transmission locomotive and mechanical drive and hydrostatic transmissions systems such as back versatile spindle, elastic clutch have been cancelled, still keep traditional diesel engine starting device, establish a three-phase alternating current auxiliary generator 51 that drives through change speed gear box 52 by diesel engine in addition, thereby realize the transmission of subsidiary engine alternating current.
Exchanging auxiliary generator 51 is JQF409C type non-salient pole three phase synchronous generator, link to each other with diesel engine 4 by change speed gear box 52, constant voltage and frequency ratio control, the three plase alternating current of output is supplied with cooling fan motor 26, traction electric machine fan motor and traction convertor in-to-in cooling fan motor and circulation-water pump electric machine.When diesel engine 4 rotating speeds were 1000r/min, output voltage was the alternating current of 400V, 101.6Hz, and the rated capacity that exchanges auxiliary generator 51 is 400kVA.The type of cooling is the protected type self-ventilation.Exchange auxiliary generator excitation control cabinet 17 and adopt double copies, switch to another excitation controlling device during fault and work on.
Diesel engine 4 is by complete stacked DC starting generator 16 startings of ZQF412 type, and than east wind 8B, the light 135kg of east wind 11 locomotive general-duty ZQF-80 type DC starting generator, electric property is constant.
Starter generator 16 and interchange auxiliary generator 51 adopt mechanical drive.
During diesel engine 4 startings, to starter generator 16 power supplies, drive diesel engine 4 startings by change speed gear box 52, versatile spindle 15 by storage battery 47; Diesel engine 4 starting backs are by versatile spindle 15, change speed gear box 52 direct drive DC starting generator 16 and exchange auxiliary generator 51.
After diesel engine 4 startings, exchange auxiliary generator 51, realize the transmission of subsidiary engine alternating current to two traction motor blowers and traction convertor in-to-in cooling fan motor and circulation-water pump electric machine power supply.Two cooling fans are driven by two pole-changing alternating-current motor/AC motors 26 respectively, according to the cooling needs, each motor are carried out pole-changing control, make that it stops, half speed or full rotating speed, and the different permutation and combination by two rotation speeds of the fan, realize that many grades of different capacities export.Two ventilating sets of locomotive all adopt three-phase AC asynchronous motor to drive, and make its control convenient, simple in structure, safe and reliable.
After diesel engine 4 startings, DC starting generator 16 is to the power supply of accessory equipments such as air compressor motor, starting lubricating oil pump motor, fuel charger motor and car body ventilating set, and this part is a direct current subsidiary engine electric tramsmission.
Cooling water system:
Be provided with the cooling water system oil system of unifying at cooling room 25..Cooling water system has cooling mechanism, and cooling mechanism is designed to the structure of integral hoisting, is made up of radiator 28, steel structure, cooling fan motor group etc.Radiator 28 adopts overhead type, is made up of 8 board-like dual channel copper radiators, and adopts dry cooling systems, and promptly when the diesel engine water temperature was low, cooling water expansion tank directly flowed back to diesel engine 4 through water tank 45 without radiator 28; When diesel engine 4 water temperatures were higher, cooling water expansion tank just passed through radiator 28, flows back to diesel engine 4 through water tank 45 again after the cooling.This system helps reducing the locomotive auxiliary power, improves the locomotive operation economy.Cooling fan 27 is whole cast aluminium structure, presses the wind formula, diameter phi 1500mm, and high workload rotating speed is 1500r/min, is driven by JD363 type ac pole-changing motor.
Oil system:
Compare with east wind 8B locomotive, lubricating oil heat exchanger 43 is changed into board-like by original shell-and-tube, and under identical volume, weight, heat-exchange capacity is bigger; The filter core of machine oil chemical fibre fil 30 is arranged and is changed " L " shape into by original "-" font, has both satisfied performance requriements in the limited space to be implemented in, and it is smooth more to help runner again, and structural arrangement is more reasonable.
Fuel oil system:
Fuel oil system is provided with the secondary filtering by the requirement design of diesel engine distribution control injection pump.At fuel charger the one-level filtering is set in the fuel tank inlet line, filtering accuracy is 75~80 μ m, with the impurity of larger particles in the elimination fuel oil.To the pipeline of diesel engine precision filter the secondary filtering is set in addition at the fuel pump outlet pipeline, filtering accuracy is 25 μ m.
Fuel oil is established the preheating facility.
Fuel tank 48 is a unitary construction.Fuel tank 48 design capacities are 7500L, and effective capacity reaches 7000L.Storage battery 47 is installed in fuel tank 48 left and right sides.Tank surface spraying damping slurry is made protective cover, and outside face covers sheet steel again, makes fuel tank 48 that heat-insulating property preferably be arranged.
Heat-insulation system:
Because locomotive adopts dry cooling systems; after diesel engine 4 is shut down; water not in the radiator 28 has reduced dissipating area widely, and the cooling water expansion tank heat radiation of 47 li in water tank is slow; can keep water temperature in a long time; so cancelled traditional preheating boiler, adopt starting diesel engine 4 to come recycle oil, water, utilize diesel engine 4 work self heated diesel 4; and utilize the electric heater power supply of starter generator 16 in being arranged in water tank 47 simultaneously, shorten greatly and beat the temperature time.
Air filtration system:
In order to reduce diesel engine 4 blwr air intake resistances, change the air-breathing elbow of former blwr into one-sided air inlet through hollow shaft straight tube 22, simultaneously for loss of weight, airfilter 20 air inlet ducts adopt the aluminium sheet welded structure.
Supercharged air adopts the secondary filtering, and the first order is 8 ND
5Locomotive whirlwind tube fil, the second stage is 22 east wind 11 locomotives papery fils.
The traction electric machine ventilation system:
Owing to adopted subsidiary engine alternating current driving system, it is very flexible that the locomotive traction motor ventilating set is arranged.Locomotive is established 2 identical traction electric machine ventilating sets altogether, by JD342 type alternating-current motor/AC motor individual drive, ventilates for forward and backward bogie truck traction motor respectively.Wherein forecarriage traction motor blower 6 adopts external air inlets, and positive draft is provided in electric apparatus room simultaneously, and trailing truck traction motor blower 41 is from the ancillary chamber air draught, tacks with the cooling fan of cooling room preventing.
Pneumatic brake systems:
Adopt JZ-7 type air damper, adorn with 2 TSA-330A screw type air compressors 42, wind supply quantity is 2 * 2.4m3/min.Air compressor 42 is driven by DC motor, through the opening and closing of 704-1 type pressure regulator control air compressor 42, total reservoir 46 air pressures is remained in 750~900kPa scope.Total reservoir 46 is installed in the rear end of vehicle frame bottom fuel tank 48.Be provided with wind regime clean-up device 19 (double-tower type) between air compressor 42 and total reservoir 46, this wind regime clean-up device 19 is installed on the power room 23 preceding partitions.Empty Electricity Federation locking device, air horn and the windshield wiper etc. of air brake and rheostatic brake also are housed in the Pneumatic brake systems.
Be provided with diesel engine 4 and starter generator 16 at power room 23, be separately installed with bogie truck 53 at two ends, vehicle frame bottom, the centre is provided with fuel tank 48, fuel tank 48 both sides are storage battery 47, be hung with total reservoir 46 at bottom of frame, wheel 50 and alternating current asynchronous traction motor 49 are installed on the bogie truck 53, and locomotive is provided with driving system, cooling water system, oil system, fuel oil system, heat-insulation system, air filtration system, traction electric machine ventilation system, Pneumatic brake systems.
Mentality of designing of the present invention mainly is to the light-weight design of freight locomotive and the raising of power, is mainly reflected in:
One. the light-weight design of freight machine:
1. adopt valve controlling sealed alkaline secondary cell to substitute former acid maintenance-free battery, but about 1 ton of loss of weight, and also volume also reduces about 1/6.
2. adopt lightweight material,, adopted Al-alloy parts in the design as: the external air inlet road of traction convertor water-cooling system, front haulage electrical motor external air inlet road, diesel engine airfilter to the air channel of blwr, tool box etc.
3. the optimal design main generator is determined rational capacity, makes its weight under the prerequisite that meets the demands be reduced to minimum.Because main generator adopts self-ventilation brushless excitation mode, so can also save ventilating set, exciting dynamo and the excitation rectifier cabinet that adds, further loss of weight makes general layout more convenient simultaneously in addition.
4. adopt the new lighter parts of weight such as complete stacked DC starting generator, screw type air compressor unit, not only alleviated weight, and performance is promoted further.
5. main rectifier cabinet and traction convertor unite two into one, and can save independently rectifier cabinet mounting structure.
6. cancel the pre-heating system of traditional band preheating boiler, adopt the electric heating thermal insulation system that starts diesel engine and generating, and the also corresponding shortening of ancillary chamber longitudinal length, more help loss of weight.
7. adopt bearing-type fuel tank technology.Through sufficient investigation, demonstration, and use for reference the pioneering technology of external locomotive, bearing-type fuel tank technology is adopted in decision, optimize the fuel tank structure simultaneously, manage to reduce the invalid volume of fuel tank, not only make locomotive weight reach requirement, and increasing substantially owing to diesel engine supporting part rigidity, resistance to shock to diesel engine and even whole locomotive has great raising, thereby can significantly reduce and avoid owing to the various failure problems that cause of vibration.
Two. aspect raising diesel locomotive power, adopt the R16V280ZJ diesel engine.
The R16V280ZJ diesel engine is for satisfying the further requirement of " speed-raising, heavy duty " of railway transportation, and design-calculated a new generation high-power locomotive diesel engine.The software for calculation by utilizing AVL advanced person and the mass data of data bank, by a large amount of development experiments and the ongoing on this basis improvement of carrying out, the main performance index of diesel engine reaches the requirement of design objective expected value substantially, particularly fuel consumption rate is lower, and the oil consumption curve is smooth, and has passed through UIC100 hour performance test and durability test in UIC360 hour.
Adopt two three, no cartridge, axlebox rod formula two stage suspension bogie truck, the alternating current asynchronous traction motor adopts the antifriction-bearing box nose suspension, axle box adopts antifriction-bearing box to add the locate mode of pull bar, adopt low level draw bar device between car body and the bogie truck, wheel is to adopting the whole wrought steel wheel of full processing import.The main difference part of this bogie truck and east wind 8B engine truck is---motor suspension adopts antifriction-bearing box seize structure, wheel to adopt full processing import monobloc steel wheel, suspension parameter to adjust according to the dynamic performance result calculated.In addition, some mature structures of east wind 8B type locomotive bogie truck have also been continued to use during design, as welded frame, draw bar device, unit brake etc.
Three. maximum utilization speed is the operating needs of 120km/h when weighing in order to satisfy locomotive 23t axle, and bogie truck has been carried out optimal design.
Carry out detailed dynamic performance computation optimization during development, and carried out the adjustment of locomotive suspension parameter according to the dynamic performance result calculated.Carry out structural adjustment design and making by the suspension parameter after optimizing in design and the manufacturing process, realized the optimization result that dynamic performance calculates.The motor suspension system has also carried out adapting to the specific aim design of higher running velocity, selected for use import driving bearing, optimized the structure of rolling axle suspension bearing box; For adapting to the requirement of AC traction electric motor, the traction driving gear adopts the interpolation type over-surplus fit structure with cooperating of motor shaft, has set up the tackling key problem group during development, and has improved at the problem that occurs in the development process, has satisfied the needs of locomotive real-world operation.
The dynamic performance test shows that locomotive has dynamic performance preferably, has satisfied the drive ability requirement of locomotive full speed degree section.The situation of opening and inspecting of post-installation review after date also shows, respectively is that key element, interpolation type traction gear structure and other various stressed parts such as the driving bearing of suspension, motor antifriction-bearing box newspaper axle system and axle suspension bearing box are in good condition.
Four. be this locomotive customized design development of new dry cooling systems efficiently.
Dry cooling systems has been used for reference ND in design and manufacturing process
5The mature technology of type locomotive cooling system.Dry cooling systems shows that through the high temperature cooling test its every technical performance parameter satisfies the requirement of the normal utilization of AC drive locomotive fully, has higher functional reliability, maintainability and economy.
This system is divided into two circulation loops of size with locomotive high-low-temperature system, controls big or small on-cycle work by the coolerstat that installs additional in the cooling water system.Radiator 28 is an overhead type bulk type dual channel radiator, cooling fan is arranged in its underpart, fan 27 adopts the wind formula of pressing, and cooling fan is driven by the double speed alternating current dynamo, and motor speed jointly controls two fans, 27 rotating speeds by microcomputer according to locomotive high-low-temperature system water temperature 5 kinds of combinations.2 coolerstats of locomotive cooling water system have been selected the temperature control valve of Britain Amot company for use, control the big short circle of high and low temperature water system respectively.
As the main line shipping high power AC transmission locomotive of domestic first platform employing dry cooling systems, east wind
8CJThe type alternating current electric locomotive has carried out positive trial aspect the high powered diesel locomotive cooling approach seeking to solve.Preliminary practice shows: the dry type cooling water system can make diesel engine work cost-effectively in range of set temperature.Adopt bulk type dual channel radiator to make the cooling mechanism compact conformation, help locomotive general layout.
Five. as light-weight design the bearing-type fuel tank.
The Structure Mechanism of carrying fuel tank 48 is to utilize the steel structure weight of original fuel tank and the load-carrying capacity that steel structure of car body is strengthened in its shared space; The oil-bearing structure of the repetitive structure of minimizing car body middle part carrying structure and fuel tank hoisting structure, change fuel tank is to reduce the purpose that steel structure and end oilreserves reach loss of weight.Owing to adopted the fuel tank carrying structure, the rigidity at car body middle part is greatly improved.By modal analysis, the rigidity that supports span lengthening aftercarriage at car body and car body will reduce.And after having adopted the fuel tank carrying structure, car body rigidity obtains to improve greatly, has satisfied designing requirement.Prove the ratio of rigidity east wind of this car body by the car body test of static strength
8BBy force.After 150,000 kilometers post-installation review, all right through opening and inspecting all, distortion and rhegma do not appear.Fuel tank bottom collection dirt, discharging pollution function is good substantially.Use and open and inspect the result to show, the fuel tank that adopts participates in the truss-like steel structure of car body of carrying first, and is not only in light weight, and car body middle part good rigidity, the car body reasonable integral structure, and strength and stiffness all adhere to specification, and can satisfy and use needs.
Six. adopted high-power braking resistor
The braking resistor 7 of locomotive makes 12 of moving resistance units altogether, and per 6 cell resistance are formed a resistor box, and each resistor box disposes a cover blower motor group power supply unit cooling respectively and uses.Big, the withstand voltage height of this rating of set, the unit resistance is big, scantling of structure is compact, and resistive band, insulating material have all adopted new material, new construction during development.Through test, performance perameter all meets design requirement.