螺桿式風機工作原理及特點

一、螺桿風機的結構

1、 Structure of screw fan

以山東螺桿鼓風機為例，螺桿風機一般主要由外罩、主機、電機、空氣過濾器、消音器、油泵油箱以及油慮等部分構成。錦工雙螺桿鼓風機可根據客戶要求進行定制，比如去掉外罩、改為無油系統(tǒng)等。

Taking shandong screw blower as an example, the screw blower is generally composed of cover, main engine, motor, air filter, muffler, oil pump, oil tank and oil filter. Jingong twin screw blower can be customized according to customer requirements, such as removing the cover, changing to oil-free system, etc.

螺桿主機作為螺桿風機的核心部件，其結構直接決定了風機性能的優(yōu)劣。螺桿主機主要由機殼、螺桿轉子、齒輪箱、軸承、軸封等主要部件構成。

As the core component of screw fan, the structure of screw host directly determines the performance of the fan. The screw host is mainly composed of casing, screw rotor, gearbox, bearing, shaft seal and other main parts.

二、螺桿風機的運行原理

2、 Operating principle of screw fan

螺桿式風機的運行原理是兩根平行的陰陽轉子在“∞”形氣缸中相互嚙合形成工作容積，通過同步齒輪，轉子作反向高速轉動，隨著轉子轉動工作容積的大小發(fā)生周期性的變化，在氣體輸送過程中同時實現氣體的壓縮。螺桿式風機的工作循環(huán)可分為吸氣、壓縮和排氣三個過程。其循環(huán)過程如下所示：

The operation principle of screw fan is that two parallel male and female rotors mesh with each other in "∞" shaped cylinder to form working volume. Through synchronous gear, the rotor rotates at high speed in reverse direction. With the rotor rotating, the working volume changes periodically, and the gas compression is realized in the process of gas transmission. The working cycle of screw fan can be divided into three processes: suction, compression and exhaust. The cycle process is as follows:

1、吸氣過程

1. Inspiratory process

氣體經吸氣口進入轉子齒間容積，隨著轉子的轉動，齒間容積不斷擴大，當齒間容積達到一定程度時，齒間容積與吸氣口斷開，吸氣過程結束。

The gas enters the inter tooth volume of the rotor through the suction port. With the rotation of the rotor, the inter tooth volume expands continuously. When the inter tooth volume reaches a certain degree, the inter tooth volume is disconnected from the suction port, and the suction process ends.

3、排氣過程

3. Exhaust process

齒間容積與排氣口連通后，排氣過程開始。轉子轉動過程中，齒間容積不斷減小，將壓縮后的氣體送排氣管。此過程一直延續(xù)到該容積達

After the volume between teeth is connected with the exhaust port, the exhaust process begins. During the rotation of the rotor, the volume between the teeth decreases continuously, and the compressed gas is sent to the exhaust pipe. This process continues until the volume reaches

三、螺桿式風機的特點

3、 Characteristics of screw fan

與羅茨風機等不同，螺桿式風機在腔體內氣體輸送的過程中實現了內壓縮，因此螺桿擁有羅茨大部分的優(yōu)點之外，同時比羅茨具備更高的效率，且氣體的輸送壓縮的過程是連續(xù)漸進的，氣流脈動更低，排氣噪音、溫度控制等均要優(yōu)于羅茨等傳統(tǒng)風機。

Different from roots blower, screw blower achieves internal compression in the process of gas transmission in the cavity. Therefore, screw blower has most of the advantages of Roots blower, and has higher efficiency than roots blower. Moreover, the process of gas transmission and compression is continuous and gradual, with lower air flow pulsation, better exhaust noise and temperature control than roots blower.