SNUBBER FOR SHOVEL DIPPER

A damper for dampening rotation of a dipper door relative to a dipper body of a mining shovel includes a shaft, an arm, and a high pressure fluid seal. The shaft supported for rotation about a shaft axis, and rotation of the shaft is dampened by fluid in an enclosed chamber. The high pressure fluid seal engages an outer surface of the shaft at a position between the first end of the shaft and thesecond end of the shaft. The high pressure fluid seal engages an outer surface of the shaft and includes a low pressure side and a high pressure side adjacent a shaft cavity. The arm includes a firstend coupled to the first end of the shaft, and a second end coupled to the dipper door or the dipper body such that rotation of the dipper door drives the arm to rotate the shaft. 种用于抑制铲斗门相对于采矿机铲的铲斗体旋转的阻尼器，该阻尼器包括轴、臂和高压流体密封。所述轴被支撑，用于围绕轴线旋转，轴的旋转受到封闭腔室中的流体的抑制。在轴的第端与第二端之间的位置处，高压流体密封接合轴的外表面。高压流体密封接合轴的外表面，并且包括低压侧和靠近轴腔的高压侧。臂包括第端和第二端，所述臂的第端连接到轴的第端，所述臂的第二端连接到铲斗门或铲斗体，从而铲斗门的旋转驱动臂而使所述轴旋转。