干式螺桿真空泵是洹過泵腔內(nèi)—對作等速反向旋轉螺桿的皓合作用， 吸入并排出被抽氣體而形成離真空， 其結構如右圖所示。 螺桿真空泵的螺桿轉子型線采用自主設計的專利型線， 由—對斜齒齒輪驅(qū)動， 以順時針方向轉動（從電機風扇端側觀察）。 在螺桿旋轉時， 二個螺桿之間、 螺桿和泵體之間都保持—定的間隙且互不接觸， 因而運轉時泵腔內(nèi)無摩擦，可以實現(xiàn)轉子的離轉速運轉。 依靠轉子間隙和泵腔間隙進行密封， 將被抽氣體被螺桿轉子平順地壓送到排氣口， 并直接排出泵腔， 螺桿泵兩端的軸封確保齒輪箱內(nèi)的潤滑油無法進入泵腔內(nèi)部。 螺桿真空泵為臥式結構， 采用聯(lián)軸器與電機直聯(lián)。 TYLG100-TYLG220型號的螺桿泵電機采用端面法蘭形式安裝于螺桿泵前蓋端面處， TYLG300及以上型號的電機則采用端面加底腳的形式， 與泵整體安裝在同—機架上。 為了減少泵的排氣噪聲， 泵的排氣口可配置消聲器。

The dry screw vacuum pump forms a high vacuum by sucking and discharging the pumped gas through the meshing action of a pair of constant-speed and counter-rotating screws in the pump chamber. Its structure 1s shown in ther1ght figure.The screw 

rotorprofile of the screw vacuum pump adopts a self-designed patent profile, which 1s driven by a pair of helical gears and rotates in a clockwise direction (viewed from the end of the motor fan). When the screw rotates, a certain gap is ma1nta1ned 

between the two screws, and between the screw and the pump body and does not touch each otherTherefore, there 1s no frict1on 1n the pump cavity dur 1ng operat1on, and the high-speed operation of the rotorcan be real1zed.Relying on the rotorgap and the pump cavity gap for sealing, the pumped gas 1s smoothly pressed by the screw rotor to the exhaust port and directly discharged from the pump cavity. The shaft seals at both ends of the screw pump ensute that the lubricat1ng oil 1n the gearbox cannot enter the pump cavity .. The screw vacuum pump is a horizontal structu「e, which is directly connected to the mototbya

coupling. The TYLGl 00-TYLG220 screw pump motor is installed on the end face of the front cover of the screw pump in the form of an end face flange, while the motor of TYLG300 and above adopts the end face and foot form and 1s installed on the same 

frame as the pump. In orderto reduce the exhaust noise of the pump, the exhaust port of the pump can be equipped with a muffler.