干式螺桿真空泵是洹過(guò)泵腔內(nèi)—對(duì)作等速反向旋轉(zhuǎn)螺桿的皓合作用， 吸入并排出被抽氣體而形成離真空， 其結(jié)構(gòu)如右圖所示。 螺桿真空泵的螺桿轉(zhuǎn)子型線采用自主設(shè)計(jì)的專(zhuān)利型線， 由—對(duì)斜齒齒輪驅(qū)動(dòng)， 以順時(shí)針?lè)较蜣D(zhuǎn)動(dòng)（從電機(jī)風(fēng)扇端側(cè)觀察）。 在螺桿旋轉(zhuǎn)時(shí)， 二個(gè)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(yùn)轉(zhuǎn)時(shí)泵腔內(nèi)無(wú)摩擦，可以實(shí)現(xiàn)轉(zhuǎn)子的離轉(zhuǎn)速運(yùn)轉(zhuǎn)。 依靠轉(zhuǎn)子間隙和泵腔間隙進(jìn)行密封， 將被抽氣體被螺桿轉(zhuǎn)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(rùn)滑油無(wú)法進(jìn)入泵腔內(nèi)部。 螺桿真空泵為臥式結(jié)構(gòu)， 采用聯(lián)軸器與電機(jī)直聯(lián)。 TYLG100-TYLG220型號(hào)的螺桿泵電機(jī)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(hào)的電機(jī)則采用端面加底腳的形式， 與泵整體安裝在同—機(jī)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.