1, for the radiator cooling air channel between the chip is dust, Clipping and blocking coverage of issues, cast bronze should take the following measures:
⑴ change the location of cooling air imports. Currently small and medium wheeled tractor engine from the tractor front-end cooling air is inhaled into the tank by cooling fan radiator. Harvest operations, bronze bushing cut front-end as cutting, conveying raised dust, clippings and other debris easily through the front of locomotives to be bothered by the wind shield tank cooling chip. In order to change this situation, we must try to change the import location of cooling air, so that the air inlet above the tractor front cover, so the dust cutting table, dry bushing Clipping for easy access to the radiator, the delayed effect of elevated water temperature.
⑵ At the inlet (the top 10 centimeters) to set a block dust board, with an area greater than the tractor front casing the area around the same time should be slightly bent backwards. Raising the cutting table so that the front most of the dust and clippings blocking plate is blocked or driven into the dust surrounding air. plain bearing At the same time yet to replace the original grille wind around 40 mesh wire, and possibly into the places where the wind up blocked by barbed wire, so that inhalation of dust, clippings, etc. would be greatly reduced, delaying the temperature increase can also .
⑶ dust cover in the set, while retaining an additional Vice-tank, increasing the capacity of cooling water,sleeve bushing thus delaying the speed of the cooling water temperature.
⑷ change the placement of the cooling water tank. Remove the original cooling water tank, design a water tank and fan support will be placed in the same vertical plane than the original tank top, to not block the operator a high degree of attention is appropriate, the engine is connected with the water tank at the original cycle, DU bushing and with the proper length triangle connecting the fan belt. This method can improve the working conditions of the cooling water tank, not only dust, Clipping easy to stick to the radiator up, but also greatly improved ventilation.bushing This method also has better cooling effect.
⑸ conditions in no way, temporarily removed the front tractor cover, let the engine and cooling system directly exposed to the air,brass bushing which also has some cooling effect, but it looks very unsightly, not to use under normal circumstances.
2, the non-overload operation, the hot season in the 90% load control to prevent the water temperature is too high.
3, the engine should bear the clean soft water,Mould guide plate operations should always check whether the water and leaking water tanks.
4, according to the operation guide to adjust the fan belt tension check the degree of order to ensure proper fan speed, provides enough air flow to the tank or the body to cool down.
5, the use of longer periods of time cleaning the engine cooling system should be comprehensive,plasic bushing clear scale. Cleaning, remove the thermostat first, then 20 kg of water, 1.5 kg of caustic soda, kerosene, the ratio of 0.5 kg formulated cleaning fluid into the tank and start the engine when the fast to slow speed, running 5-10 minutes, until the water temperature increases to 70-80 ℃ when the flame, standing 10-12 hours, and then start the engine, running on medium speed for 5-10 minutes, then turn off, let go of hot cleaning solution, then add water, 4-5 minutes in the release speed operation to flush cooling system, so cleaning two or three times, replace the thermostat coupled with adequate cooling water.
6, check the working performance of the thermostat, if necessary, can be removed (in hot weather), to prevent the failure of the thermostat of the normal circulation of cooling water, reducing cooling.
7 pumps to work longer to deal with the water pump impeller and the pump shell holes, water pump shaft and bearing friction losses and the seal components to be checked. Such as the friction loss will cause a displacement of less than serious, affecting the cooling of the water cycle, when the need for timely repair.
8, the use of longer engine valve seal should be tested, and properly adjust the valve clearance check. If a bad valve seal leakage will cause high pressure gas, causing the engine temperature. The main reason for not sealing valve seat and the valve is generally a bad contact, the spring elastic weak. If the valve off loose, should be promptly repaired.
9, the fuel supply advance angle adjustment accuracy, ensure the injection timing. Fuel pump long-term use, the cam shaft, wheel, and with the moving column and other parts badly worn, it will cause oil too late, causing diesel fuel is not injected into the cylinder late in a timely and thorough combustion, or causes a burning, so that the engine overheating. Therefore, we must promptly examine and adjust the fuel supply advance angle.
10, examine and adjust the fuel injector, the injection pressure, spray, spray angle to meet the requirements. If the injector spray, spray cone angle is not good, will make the fuel and air are not well mixed, resulting in decreased burning rate, extend the burning time, causing the engine temperature.
11, need to be considered in the design.
Combine a long time because of work, environment, high temperature, poor ventilation, and walked slowly, in the work under such adverse conditions, the ability to work the engine cooling system is very important. Should be designed with the engine at high temperature, full load conditions to determine when the demand for cooling capacity. To increase the cooling capacity, proposals should consider the following two questions: on the one hand the need to improve the volumetric efficiency of the fan, fan belt drive to improve capacity, reduce the slip rate, choose the best ventilated location, reducing the flow of cooling air resistance, increasing the inlet air quantity; the other hand, need to improve the fan blades from the streamlined hood design and construction to start, increasing the cooling area, and fundamentally improve the cooling capacity.
12, such as combine harvesters optional air-cooled engine, you need to consider the appropriate capacity to improve their ventilation to reduce heat bad situation.