Transmission system cooling
As the altitude increases and the air is thin, as the supercharger speed increases, the supercharging degree increases, and the diesel engine thermal load increases, which causes the cooling water temperature to rise, which also adversely affects the heat dissipation of the entire transmission system. In addition to the influence of daily temperature difference and seasonal temperature difference, the construction machinery used in the desert area is often subjected to radiant high temperature of 60e or more above the surface of the ground, causing the engine to work overheated and undercooled, and the original design capability of the chassis transmission system cooling system. It is also far from meeting the actual needs. At this time, it is necessary to recalculate the heat balance of each part, and take necessary heat dissipation measures and conduct industrial tests to ensure the reliability and service life of the whole machine.
In the choice of structural schemes, the high-efficiency air hood should be considered first, the pump speed should be increased to increase the coolant flow, and the fan speed can be increased to increase the fan's heat dissipation capacity; the inlet and outlet pipes should avoid hard bends, small radius elbows, and increase the pipe. Diameter to reduce the flow resistance in the cooling pipeline; increase the blinds in the radiator; carry out repeated experiments on the proposed improvement scheme, in order to meet the requirements of use on the basis of minimizing costs and reducing the amount of modification. Due to the low boiling point of the high-altitude air, the heat dissipation performance of the coolant is lowered, and the pressure limiting valve of the water tank on the water tank should be increased to ensure the normal operation of the cooling system. Increasing the heat sink under the conditions of the installation space is the most effective and quickest way to improve the heat dissipation capacity, but the impact of the installation space and the resulting cost increase cannot be underestimated.
| Technical Parameters | ||||||
| Model | 754 | 804 | 904 | 1004 | 1104 | |
|
General Parameter |
Drive Type | 4WD | ||||
| Dimensions LxWxH (mm) | 4520×2135×2750 | 4520×2135×2750 | 4520×2170×2850 | 4520×2170×2850 | 4650×2150×3040 | |
| Front Wheel Track (mm) | 1569-2005 | 1630-1960 | ||||
| Rear Wheel Track (mm) | 1500-2100 | 1520-2120 | ||||
| Wheel Base(mm) | 2325mm | |||||
| Ground Clearance (mm) | 370 mm | 430mm | 440mm | |||
| Rated Traction Force (kN) | 16.5 kn | 17.6 kn | 19.8kn | 24kn | 26kn | |
| Min. use weight (Kg) | 3540kg | 3675kg | 3920kg | |||
| Min. Turning Radius (m) | ≤5.3 m | |||||
| Speed range | 1.55-27.99Km/H | 1.57-28.35Km/H | 1.6-33.77Km/H | |||
| Diesel Engine | Model | YT4B4-23 | YT4B4-23 | LR4M5-23 | LR4V5-23 | LR6B3-23 |
| Type |
4 Cylinder , 4-Stoke Cycle Water Cooled,Vertical aligned |
6 Cylinder , 4-Stoke Cycle Water Cooled, Vertical aligned |
||||
| Rated Power (kw/hp) | 55.1kw75HP | 58.8kw/80HP | 66.1kw/90HP | 73.5kw/100HP | 80.8kw/110HP | |
| Rated Speed (rpm) | 2300 | 2300 | 2300 | 2300 | 2300 | |
| Bore x Stroke (mm) | 108×130 | 108×130 | 112×135 | 115x135 | 108x125 | |
|
Rated fuel consumptio rate |
≤242 (g/Kw.h) | |||||
|
Transmission System |
Gear Box |
Combined 12F+4R 12 forward gears , 4 reverse gears,creeper shift (24F+8R) or shuttle shift (12F+12R) for option |
||||
| Rear axle--Central transmission | Spiral Bevel gear | |||||
| Rear axle--Differential | 4 planet bevel gears | |||||
| Rear axle--Differentila Lock | Locking pin type | |||||
| Rear axle--Final Transmission | Single planet bevel gear,outer mounted at both sides of rear axle | |||||
| Front drive --Transmission shaft | Central Transmission shaft | |||||
| Front drive -Central transmission | Spiral Bevel gear | |||||
| Front drive -Front diffenential | 2 planet bevel gears | |||||
| Front drive-Final Transmission | Single-planet gearsing | |||||
| Clutch | dry style double action | |||||
|
Traveling Mechanism |
Front Tyre | 11.2-24 | 11.2-28 | 13.6-24 | ||
| Rear Tyre | 16.9-30 | 13.6-38 | 16.9-34 | |||
| Steering Gear | Hydraulic Steering | |||||
| Brake | Oil Immersed Multiplate Disc | |||||
|
Working Device |
Oil fuel tank | 145 L | ||||
|
Lifting Capacity (at 610 mmBehind LiftPoint (N)) |
≥13.3kN | ≥14.2kN | ≥15.9kN | ≥17.6kN | ≥19.5kN | |
| Hydraulic System: | 3-Point Suspension | |||||
|
P.T.O shaft : Rotating Speed (rpm) |
540/1000 | |||||
| Spline Size | 6-Ø35 Rectangular Spline | |||||
1. Matching the 485 diesel engine, Large torque reserve, Strong power;
2. Using 8 + 2 meshing swap file, reasonable matching speed, high efficiency;
3. Power emissions upgrades, performance, low fuel consumption, high reliability;
4. The body is small, short wheelbase, compact structure;
5. Using underneath type exhaust pipe bending, rear accumulator, overall appearance is narrow;
6. The power output double speed 540/720, can form a complete set of various agricultural machinery;
7.Flat floor, hanging pedal, flexible and easy to operate;
8.Hydraulic steering, steering is more flexible.
1. Matching the 485 diesel engine, Large torque reserve, Strong power;
2. Using 8 + 2 meshing swap file, reasonable matching speed, high efficiency;
3. Power emissions upgrades, performance, low fuel consumption, high reliability;
4. The body is small, short wheelbase, compact structure;
5. Using underneath type exhaust pipe bending, rear accumulator, overall appearance is narrow;
6. The power output double speed 540/720, can form a complete set of various agricultural machinery;
7.Flat floor, hanging pedal, flexible and easy to operate;
8.Hydraulic steering, steering is more flexible.
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