Views:2001 Author:Site Editor Publish Time: 2019-08-28 Origin:Site
A sewage suction truck has a vertical suction stroke of 7-9 meters. In general, a vertical suction stroke can reach 8 meters, which is an excellent suction truck. The horizontal suction distance is generally extended to about 45 meters in the case of better sealing. This suction has been able to meet the needs of most people.
However, the demand is endless. In order to pursue ultra-high suction, the vacuum pump used by the powerful suction truck is getting more and more large, which in turn causes the input power and volume to increase. The traditional side force type can not meet the vacuum pump. The power demand, so someone came up with a method to drive the vacuum pump with a dedicated engine. The sub-engine hard connection is directly combined with the vacuum pump and placed between the tank and the cab, which perfectly solves the problem of the power source of the vacuum pump.
But the problem then comes. First, because there is a hard connection between the engine and the vacuum pump, there is no gear system or pulley system cushioning when starting and closing. The instantaneous high torque load is very likely to cause shaft breakage and damage.
Then the hard connection does not have any speed ratio conversion mechanism. The power output of the engine cannot match the speed required by the pump. If it is too small, the pump will not exert its proper efficiency. If it is too large, it will irreversibly damage the pump itself. In this way, frequent replacement of suction truck parts is also a big expense.
Moreover, the auxiliary engine itself has a large volume and weight, which increases the self-weight of the suction truck at the time of no-load, and plays a great role in increasing the fuel consumption of the vehicle, and the economic cost is not cost-effective. In order to drive the vacuum pump, the sub-engine lacking the shifting mechanism mostly uses a model that is much larger than the input power required by the pump, and the fuel consumption of the sub-engine is also an unavoidable consumption. Noise and emissions are the most intuitive manifestations. Most of the auxiliary engines are not original authentic, the quality is unstable, and the cost of damage replacement is also scary.
Therefore, Chengli suction truck manufacturers do not recommend vacuum suction trucks with auxiliary hair. In the context of the country's current promotion of energy conservation and environmental protection, the auxiliary engine can be said to be a technology that is on the verge of elimination. What should the real mainstream technology be? The Lord is coming — the transfer case.
Simply speaking, the transfer case is to drive the main power of the vacuum suction truck chassis to the different shafts through the transfer case, thereby driving the water pump and the vacuum pump. In this way, the power output of different special equipments can be realized only by the engine power of the automobile itself, and all the equipments can be operated at the same time, and the professional power matching of the equipment can be better, and the best efficiency of the equipment can be exerted.