静涡旋盘与动涡旋盘彼此之间在几条直线（ 在横截面上是几个点） 上接触形成几对月牙形封闭腔，动涡旋盘在曲轴的驱动下绕静涡旋盘的涡旋体中心运动，接触点沿涡旋曲面移动实现吸气、压缩与排气。
The working chamber of scroll vacuum pump is composed of a pair of scroll disk pairs with conjugate profile. A scroll disk is a scroll disk-shaped structure with one or several involute spiral grooves on the disk surface. A static scroll disk and a moving scroll disk are staggered and assembled together, and the 180 ° phase difference between the moving and static disks is guaranteed by the anti rotation mechanism. A pair of scroll disk pairs formed in this way constitute the air extraction mechanism of the oil-free scroll vacuum pump.
The static scroll disk and the moving scroll disk contact each other on several straight lines (several points on the cross section) to form several pairs of crescent shaped closed cavities. The moving scroll disk moves around the center of the vortex body of the static scroll disk driven by the crankshaft, and the contact point moves along the vortex surface to realize suction, compression and exhaust.
Driven by the motor, a group of new crescent closed cavities are formed every time the crankshaft rotates, so as to realize the suction, compression and exhaust cycle of the scroll vacuum pump, and contain and forcibly transport the extracted gas.