一.SD8高驱动履带推土机突破了传统的履带推土机设计方法,将驱动链轮脱离了行走架,布置到与终传动、转向制动离合器,中央传动同一轴线上,履带呈三角形布置,消除了地面直接传递给驱动链轮的冲击载荷,使传动系统的寿命提高了30%。
二.行走系统采用弹性悬挂装置,便于引导轮越过障碍,连续的副悬挂装置,通过其浮动作用,可以紧贴地面行驶。缓冲装置吸收地面冲击载核,减小了传至底盘约50%的冲击载荷,改善了车辆行走的平稳性和司机的舒适性、增加了履带与地面的接触面积(增大约15%),提高了整机的牵引性。行走架与机架的绞接由枢轴式取代了传统的八字梁结构,提高了行车架与机架的连接刚度。整机重心布置可方便地调节,以满足不同机具对整机重心的使用要求。
四.液力机械变矩器采用外分流机械、液力两部分输出, (液力输出占70%,机械输出占30%),兼备了液力传动能自动适应载荷的变化和机械传动通过性能好的特点,拓宽了发动机与变矩器匹配的高效范围,提高了传动效率。
五.动力换档变速箱采用行星式结构,紧凑合理,体积小,传动效率高,变速箱离合器采用多片湿式,油压结合,弹簧分离,摩擦片采用强制冷却润滑,最大限度地提高了离合器寿命。
六.转向与制动离合器均为免调式,湿式多片离合器,制动离合器为碟簧压紧,液压分离的常结合离合器,转向离合器为常分离,液压结合离合器;转向与制动离合器联动手操纵,可实现缓转弯、急转弯、整车制动、脚踏板实现整车总制动;设有锁车机构,起动发动机时可使整机保持制动状态,保证坡道起动发动机不溜车,使整机作业更加安全可靠。
八.工作装置液压系统采用压力补偿回路,减小了液压功耗,提高了作业平稳性,降低了司机作业的技术要求。工作装置油缸靠近机身近乎垂直地面布置,提高了铲刀的铲掘力,铲刀采用S型,容量大,其推土作业效率大大优于普通型推土机。
九.松土装置采用全液压、可调式、单钩裂土器,使用四根油缸,其中两根油缸为转角油缸,调整此油缸可改变松土钩角度,以便更好地插入、掘起和碎裂岩石,另外两根油缸为松土油缸,调整此油缸可改变裂土深度,上下可调的松土钩提高了生产率和延长松土钩的使用寿命,流线型设计的松土器及柴油箱后背使司机在处于水平时能看到松土器的铲尖,便于司机的操作。同时大大地提高了松土器的强度及可靠性,使其具有独特的裂土功能。
十一.由声光电三级报警的电子监控系统取代了传统的仪表监视系统,在推土机工作时分别对柴油机的水温、油压;底盘液压系统和工作装置液压系统的工作油温,油压;柴油箱中的油量等参数进行记录监控。推土机一旦发生故障,电子监控仪即发出报警,避免了由于小故障的发生未能及时处理而造成推土机的严重损坏。
SD8高驱动履带推土机系行走系统弹性悬挂、驱动链轮高置、液力机械传动、液压操纵式履带推上机,配装S型铲刀、单钩松土器。整机关键结构采用高强度板材,能够满足在多石、恶劣地面环境中作业。装有防倾翻的司机驾驶室以及舒适的司机座椅。
SD8 is elevated sprocket, track-type bulldozer. Its undercarriage system is elastic suspended, elevated sprocket, hydraulic direct drive, and hydraulic controls. SD8 dozer can be equipped with S-blade, single shank ripper. Main structure uses high strength plate and is suitable for working in stony, worse earth condition. The cab is installed Rops device and comfortable seat.
整机性能参数
使用质量(不包括松土器): 40000㎏
松土器重量: 4300 ㎏
发动机飞轮功率/转速: 246kw(335HP)/1900r/min
履带接地长度: 3280mm
接地比压(不带松土器): 105 kPa
履带中心距: 2200mm
外型尺寸(长×宽×高)
(带单钩松土器): 8090×4172 ×3952 mm
坡行角度: 纵向30°,横向25°
最小离地间隙: 485mm
理论行驶速度: km/h
前进一档0~3.9 倒退一档0~4.8
前进二档0~6.8 倒退二档0~8.4
前进三档0~11.9 倒退二档0~14.8
推土作业率(运距40m) 452m3/h
Main specifitions
Operating weight(not including ripper) 40000㎏
Ripper weight 4300㎏
Engine flywheel power/RPM 246 kw(335HP)/1900r/min
Track ground contact length 3280 mm
Ground pressure(without ripper) 105 kPa
Track contact length 2200 mm
Overall dimensions(L×W×H)
8090×4172×3952(with single shank ripper)
Gradeability latitude30 ° transverse 25°
Ground clearance 485mm
Theory travel speed (km/h)
1st gear forward 0-3.9 1st gear backward 0-4.8
2nd gear forward 0-6.8 2nd gear backward 0-8.4
3rd gear forward 0-11.9 3rd gear backward 0-14.8
Dozing operating rate (moving distance 40m) 452m3/h
发动机性能参数
Diesel engine specifications
柴油机型号: NTA855-C400(BCⅢ)
柴油机型式: 水冷、单行、四冲程、涡轮增压、六缸、140mm缸径
额定转速: 1900r/min
飞轮功率: 246kw(335HP)
发动机扭矩储备系数: 24.5%
起动方式 24V电起动
Model NTA855-C400 (BCⅢ)
Type water cooled, single line, four strokes, turbocharged, 6-cylinders, diameter 140mm
Rated speed 1900r/min
Flywheel power 246kw(335HP)
Torque storage coefficient 24.5%
Start mode 24v electric starting
变矩器部件
Torque converter
SD8高驱动履带推土机采用输出端外分流液力机械传动单级变矩器。
Power separating, hydraulic-mechanic drive, single stage torque converter is used in SD8 elevale sprocket bulldozer.
变速总成
Transmission assembly
独到的结构将中央传动、变速箱和变速控制阀构造成为一个整体部件。可将总成或其中任一部件拆装,极其便于维修。变速箱为多级行星传动,完全实现了积木式拆装,并通过性能优良的多功能控制阀可在前进或倒退一、二、三各档位之间任意快速地变换。
It integrates center drive, transmission and speed changing control valve into one component. It can be assembled or disassembled as assembly or as a part. It is very convenient to service. Transmission is multi-stage planetary drive to realize modular assembling and disassembling. Gear the shift can be changed among 1st gear, 2nd gear, 3rd gear forward or reverse rapidly, through multi-functional control valve.
转向与制动离器部件
Steering and braking clutch
转向离合器与制动离合器均为免调式、湿式多片离合器。制动离合器为碟簧压紧、液压分离的常结合离合器;转向离合器为全液压压紧的非常结合离合器。转向与制动离合器联动手操作,可实现缓转弯、急转弯、整机制动,脚踏板实现整机总制动,设计有制动拨杆,起动发动机时行走系保持制动状态,保证坡道起动发动机不溜车。
Steering and braking clutch are adjustment-free, oil-type, multi-disc clutch. The braking clutch is pressed by spring, separated hydraulicly, constant meshed type. Steering clutch is hydraulic pressed, non-constant engaged clutch. Steering and braking acts simultaneously, operated manually to realize steering slowly, sharply and braking. The braking of entire machine can be realized through the pedal. Braking rod is designed to keep the undercarriage system in braking condition and guarantee the machine not to slip on slope when starting the engine.
终传动
Final drive
终传动为两级行星传动减速机构,装在转向与制动离合器外侧,组合式链齿,拆装维修十分方便。
Final drive is two-stage planetary reduction gear mechanism. It is mounted at outside of steering and braking clutch. Combined sprocket segment is very convenient for assembling, disassembling and service.
左右行走系统
undercarriage system
SD8高驱动履带推土机的行走系统采用了弹性安装的新型行走系统,履带呈三角型布置,驱动链轮高置。连续的副悬挂装置,通过其浮动作用,可以紧贴地面障碍物行走,改善了车辆行走的平稳性和驾驶员的舒适性,增加了履带与地面的接触面积,提高了整机的行走和牵引性能。
SD8 dozer utilizes elastic-mounted undercarriage. The track is triangle shape. The sprocket is elevated. Through floating function of continuous auxiliary suspension device, the machine can travel near obstacle on the ground to improve travelling stability and comfortable of the driver. Ground contact area is increased. Performance of travelling and traction is raised.
防倾翻保护的隔离安装的驾驶室
R.o.p.s cab
驾驶室为六边形薄壁箱形结构,六面均装有玻璃,视野开阔,后面是推拉玻璃。根据用户需求可配装空调。翻车防护架刚性强,推土机在非常状态时能有效地保护司机的安全。全部可调的新型司机座椅向右偏15°,加上倾斜的燃油箱、发动机罩和履带,使司机具有极好的前后方视野。
The cab is hexagonal thin wall box-type structure. Glass is mounted at six sides with wide viewing range. Pulling and pushing glass is mounted at back side. Air conditioner can be installed according to the requirement of customer. The structure of Rops is rigid. It can protect the driver efficiently when the bulldozer is in special condition. Adjustable operator’s seat bias to right 15° and fuel tank, engine hood, track are tilting, the driver can has a good front and rear sighting range.
工作装置液压系统
Implement hydraulic system
工作装置液压系统控制铲刀的升降、侧倾以及松土装置的动作,主要由泵、油缸、阀组、油箱管路及操纵部份组成。工作装置泵采用双联叶片泵,其主要性能参数为:
前泵: 排量 129 ml/r 额定压力 21 MPa
额定转速:2000 r/min
后泵: 排量 56 ml/r 额定压力 21 MPa
额定转速:2000 r/min
铲刀提升系统额定工作压力为: 17.5 MPa
侧倾系统额定工作压力为: 18.3 MPa
Implement hydraulic system can control lifting, lowering and tilting of the blade. It also can control the moving of ripper. It mainly consists of oil pump, cylinder, valve group, oil tank line and controlling parts. Implement pump is two group vane type pump. The main specification is as following:
Front pump Displacement 129ml/r
Rated pressure 21MPa
Rated speed 2000r/min
Rear pump Displacement 56ml/r
Rated pressure 21MPa
Rated speed 2000r/min
Rated operation pressure of blade lifting system 17.5MPa
Rated operation pressure of tilting system 18.3MPa
底盘液压系统
Hydraulic system of tractor
底盘液压系统由油泵、变速控制阀、转向与制动控制阀、顺序阀、变矩器出口溢流阀、滤油器以及管路等组成。主泵采用三联齿轮泵,其主要性能参数为:
润滑泵: 公称排量90ml/r 额定压力0.4 MPa
额定转速2000 r/min
工作泵: 公称排量115ml/r 额定压力3.1 MPa
额定转速2000 r/min
排油泵: 公称排量160ml/r 额定压力0 .5 MPa
额定转速2000 r/min
It is composed of oil pump, transmission control valve, steering and braking control valve, sequence valve, torque converter outlet relief valve, filler and oil line, etc. Main pump is three group gear pump. The main performance is as following:
Lubricating pump Rated displacement 90 ml/r
Rated pressure 0.4 MPa
Rated speed 2000 r/min
Working pump Rated displacement 115 ml/r
Rated pressure 3.1 MPa
Rated speed 2000 r/min
Oil draining pump Rated displacement 160 m/r
Rated pressure 0.5 MPa
Rated speed 2000 r/min
维修保养加注容量
Maintenance filling capacity
柴油箱: 753升
水箱及柴油机冷却水 125升
发动机曲轴箱 47升
后桥箱底盘液压系统用油 167升
最终传动用油(单侧) 23升
行走缓冲弹簧箱(每侧): 30升
枢轴润滑用油 13升
装置系统油箱: 89升
Fuel tank 753L
Water tank and diesel engine cooling water 125L
Camshaft case of diesel engine 47L
Bevel gear case hydraulic system of tractor 167L
Final drive (one side) 23L
Rear seat buffer spring case (each side) 30L
Pivot lubricating 13L
Implement system oil tank 89L
工作装置部分
Blade
铲刀型式 高 度 宽 度 容 量
S型铲刀 1765mm 4172 mm 13.0 m3
Type Height Width Capacity
s-blade 1765mm 4172 mm 13.0 m3
松土装置
Ripper
形式: 单钩可调全液压松土器
松土角度: 45°
最大松上深度 1150mm
最大提升高度 830mm
Type single, adjustable hydraulic ripper
Rippering angle 45°
Max. penetration 1150mm
Max. lifting height 830mm
铲刀
型式
|
履带接地长度A
|
整机长度B
|
铲刀
高度C
|
整机
高度D
|
铲刀
宽度E
|
履带接地中心距F
|
挖掘
深度
|
提升
高度
|
铲刀
容量
|
直倾铲(S型铲刀)(带松土器)
|
3280
|
8090
|
1765
|
3952
|
4172
|
2200
|
614
|
1288
|
13.0
|
直倾铲(S型铲刀)(带牵引机构)
|
3280
|
6755
|
1765
|
3952
|
4172
|
2200
|
614
|
1288
|
13.0
|
Blade type
|
Ground contact length(A)
|
Overall Lenght(B)
|
Blade height(C)
|
Overall height(D)
|
Blade width(E)
|
Track center distance(F)
|
Penetrating length
|
Lifting height
|
Blade capacity
|
Straight tilting blade(s-blade)
(with ripper)
|
3280
|
8090
|
1765
|
3952
|
4172
|
2200
|
614
|
1288
|
13.0
|
Straight tilting blade(S-blade)
(with traction machanism)
|
3280
|
6755
|
1765
|
3952
|
4172
|
2200
|
614
|
1288
|
13.0
|