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渦旋真空泵的工作腔是由一對型線共軛的渦旋盤副嚙合安裝組成。渦旋盤就是在盤面開有一個或幾個漸開線螺旋槽的渦旋型盤狀結構體。一個靜渦旋盤與一個動渦旋盤相互交錯組裝在一起，動、靜盤之間由防自轉機構保證180°相位差，這樣組成的一對渦旋盤副構成了無油渦旋真空泵的抽氣機構。

靜渦旋盤與動渦旋盤彼此之間在幾條直線（ 在橫截面上是幾個點） 上接觸形成幾對月牙形封閉腔，動渦旋盤在曲軸的驅動下繞靜渦旋盤的渦旋體中心運動，接觸點沿渦旋曲面移動實現吸氣、壓縮與排氣。

在電機的帶動下，曲軸每轉一圈，就有一組新的月牙封閉腔形成，從而實現渦旋真空泵的吸氣、壓縮、排氣循環，對被抽氣體形成包容和強制輸送。

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.