刮板式洗砂机的工作原理是电机通过蜗轮减速机变速,并由蜗轮轴上的两个圆盘带动连杆作往复运动,同时刮板也跟着作往复运动,进行洗砂,并将洗净的砂推出洗砂槽(见图1)。这种洗砂机是变速传动,圆盘每转一周,圆盘与连杆铰结处的加速度有两点为零,因此,洗砂机在工作时,操作者稍不注意,多加一点砂,就出现“闷车”现象,影 The working principle of the scraper type sand washer is that the motor shifts the speed through the worm gear reducer, and the two discs on the worm gear shaft drive the connecting rod to reciprocate, and the scraper also follows the reciprocating motion to perform sand washing and wash. The sand pushes out the sand washing tank (see Figure 1). This type of sand washer is a variable speed drive. For each revolution of the disc, the acceleration at the joint between the disc and the connecting rod has two zero points. Therefore, when the sand washer is in operation, the operator does not pay much attention and adds a little sand. There was a phenomenon of “stingy car”.