The purpose of this study is to slide the impeller left and right according to the water temperature of the cooling water delivered by the pump, so as to change the escorting capacity of the water tank, so as to prevent the impeller of the hydrocolloid from providing variable structure.In order to achieve this goal, this study is to install the impeller in combination with the spline gear and sliding formed on the rotating shaft of the water pump. According to the water temperature of the cooling water flowing into the space of the water pump, the impeller is left and right, The impeller of the water pump, including the modulator arranged on the shell, is characterized by variable structure in order to make the pump slip.
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