螺杆式空压机工作原理

1、吸气过程：

1. Inspiratory process:

螺杆式的进气侧吸气口，必须设计得使压缩室可以充分吸气，而螺杆式压缩机并无进气与排气阀组，进气只靠一调节阀的开启、关闭调节，当转子转动时，主副转子 的齿沟空间在转至进气端壁开口时，其空间最大，此时转子的齿沟空间与进气口之自由空气相通，因在排气时齿沟之空气被全数排出，排气结束时，齿沟乃处于真空 状态，当转到进气口时，外界空气即被吸入，沿轴向流入主副转子的齿沟内。当空气充满整个齿沟时，转子之进气侧端面转离了机壳之进气口，在齿沟间的空气即被 封闭，以上为，[进气过程]。

The screw type suction port at the inlet side must be designed so that the compression chamber can fully absorb air. However, there is no intake and exhaust valve group in the screw compressor. The air intake is only regulated by the opening and closing of a regulating valve. When the rotor rotates, the main and auxiliary rotors The groove space of the rotor is the largest when it turns to the inlet end wall opening. At this time, the groove space of the rotor is connected with the free air of the air inlet. Because the air in the groove is completely discharged during the exhaust, the groove is in a vacuum state at the end of the exhaust. When it is turned to the air inlet, the outside air is inhaled and flows into the groove of the main and auxiliary rotors along the axial direction. When the air fills the whole gear groove, the end face of the inlet side of the rotor turns away from the air inlet of the casing, and the air between the tooth grooves is closed.

2、封闭及输送过程：

2. Sealing and conveying process:

主副两转子在吸气结束时，其主副转子齿峰会与机壳闭封，此时空气在齿沟内闭封不再外流，即[封闭过程]。两转子继续转动，其齿峰与齿沟在吸气端吻合，吻合面逐渐向排气端移动，此即[输送过程]。

At the end of the suction, the teeth of the main and auxiliary rotors are closed with the casing. At this time, the air is closed in the groove and no longer flows out. When the two rotors continue to rotate, their tooth peaks coincide with the tooth groove at the suction end, and the anastomosis surface gradually moves to the exhaust end, which is called "transportation process".

3、压缩及喷油过程：

3. Compression and injection process:

在输送过程中，啮合面逐渐向排气端移动，亦即啮合面与排气口间的齿沟间渐渐减小，齿沟内之气体逐渐被压缩，压力提高，此即[压缩过程]。而压缩同时润滑油亦因压力差的作用而喷入压缩室内与室气混合。

In the process of transportation, the meshing surface gradually moves to the exhaust end, that is to say, the gap between the meshing surface and the exhaust port gradually decreases, and the gas in the groove is gradually compressed and the pressure is increased, which is called "compression process". At the same time, the lubricating oil is also injected into the compression chamber to mix with the chamber air due to the effect of pressure difference.

4、排气过程：

4. Exhaust process:

当转子的啮合端面转到与机壳排气相通时，（此时压缩气体之压力最高）被压缩之气体开始排出，直至齿峰与齿沟的啮合面移至排气端面，此时两转子啮合面与机壳 排气口这齿沟空间为零，即完成（排气过程），在此同时转子啮合面与机壳进气口之间的齿沟长度又达到最长，其吸气过程又在进行。

When the meshing end face of the rotor turns to be connected with the exhaust of the casing, the compressed gas begins to be discharged until the meshing surface of the tooth peak and the tooth groove moves to the exhaust end face, and the meshing surface of the two rotors is connected with the casing At the same time, the length of the groove between the meshing surface of the rotor and the inlet of the casing reaches the longest, and the suction process is in progress.