概述：1、自上料搅拌车的维修数据应用不当1 Improper application of maintenance data of self feeding mixer在自上料搅拌车维修中不
1. Improper application of maintenance data of self feeding mixer
In the maintenance of self loading mixer, it is an important reason that the maintenance data can not be selected scientifically. For example, the width of the contact surface between the valve and the valve seat is specified as 1-2.2mm for the inlet valve and 1.5-2.5mm for the exhaust valve. However, in the actual maintenance, many people think that it is better to be wider than narrow, and they are used to choosing the upper limit or close to the upper limit value, because the width of the working face of the newly repaired valve is close to the service limit. Another example is the valve foot clearance, which is generally 0.2-0.25 mm. However, in maintenance and adjustment, it is considered that a larger clearance is better than a smaller one. Therefore, if the valve foot clearance is used beyond the upper limit, it will not only reduce the engine power, but also cause knocking noise and early damage.
2. Smooth grinding of valve of self feeding mixer
In the maintenance of the self feeding mixer, if the valve is ablated, pitted and sunken, it should be polished. Generally, it is carried out on the polishing mill. Four problems should be paid attention to during the operation: first, ensure that the valve head is concentric with the rod, otherwise, straighten it first; second, the smaller the smooth grinding vehicle can grind out the complete conical surface, the smaller the better; the third is to improve the surface finish as much as possible; the fourth is to ensure that the valve head is concentric with the rod, otherwise it should be straightened first The depression at the end of the valve stem should be ground smooth.
3. Hinge pin of valve guide from loading mixer
The fit clearance between the valve stem and the valve guide is the key to determine the service life of the valve guide. Therefore, when the valve guide is replaced with a new one, the fit clearance should be strictly controlled when the pin is hinged. The service life can be effectively extended by using the lower limit of the clearance specified for each mixer.
4. Grinding of valve of self feeding mixer
The grinding of the valve of the self loading mixer can be divided into two situations: one is that the valve and valve seat have only slight pockmarks, which need not be polished and reamed; the other is that both the valve and the valve seat are polished and grinded after hinge pin. The former is first ground with full gold steel sand, and then the pitting is ground off, and then the fine emery is used for grinding. Finally, oil is applied to grind until the seal meets the requirements and the width meets the requirements. The latter can only be ground when the sealing performance can not meet the requirements. However, attention must be paid during operation, and it is strictly forbidden to knock the valve up and down, otherwise concave sand marks will appear, which will affect the maintenance quality.
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罐体容积大不只影响购车的本钱，还影响车辆功用，行车安 全系数低，罐体越大重 心越高，车辆稳定性差。所以车主朋友们应根据搅拌车作业的