The vertical suction distance of a suction truck is 7-9 meters. Generally speaking, the vertical suction distance can reach 8 meters, which is an excellent suction truck. In general, the horizontal distance of suction can be extended to about 45 meters under the condition of better sealing. This suction distance has been able to meet the needs of most people.
But the demand is endless. In order to pursue super-high suction range, the vacuum pump displacement of the powerful suction truck is increasing, which also causes the increase of input power and volume. The traditional side-pulling mode can not meet the power demand of the vacuum pump, so some people have come up with a special engine to drive the vacuum pump. The hard connection of the auxiliary engine is directly combined with the vacuum pump and placed between the tank body and the cab, which perfectly solves the problem of the power source for the vacuum pump.
But then comes the problem. Firstly, instantaneous large torque load is very easy to cause shaft fracture and damage because that there is the hard connection between the engine and the vacuum pump and there is no gear system or belt wheel system buffer when starting and closing.
Then there is no speed ratio conversion mechanism in the hard connection. The power output of the engine can not match the speed required by the pump. If the pump is too small, it will not play its due efficiency, and if it is too large, it will cause irreversible damage to the pump itself. In this way, the frequent replacement of the parts of the suction truck is also a big expense.
Moreover, the auxiliary engine itself has a larger volume and weight, which increases the weight of the suction vehicle when there is no load, and plays a great role in the increase of vehicle fuel consumption. However, it is not economic. In order to drive the vacuum pump, the auxiliary engine lacking transmission mechanism mostly chooses a model with much higher input power than the pump, and the fuel consumption of the auxiliary engine can not be avoided. Noise and emission pollution are the most intuitive manifestations. Most of the sub-engines are not original products, and the quality is not stable. Once it is damaged and replaced, the cost is too scary.
Therefore, Chengli suction truck manufacturers do not recommend vacuum suction trucks with side functions. Under the background of vigorously advocating energy conservation and environmental protection at the present stage of the country, the auxiliary engine can be said to be a technology on the verge of elimination. What should be the real mainstream technology? Here comes the main thing———the transmission box.
Simply speaking, the transfer box is to output the main force of the chassis of the vacuum suction truck to different axles through the transfer box, thus driving the operation of the water pump and the vacuum pump. In this way, the power output of different special equipment can be realized only by the engine power of the automobile itself, and all the equipment can run at the same time, and the professional power matching of the equipment can be done better, and the best efficiency of the equipment can be brought into play.