螺杆式(即双螺杆)制冷压缩机具有一对互相啮合、相反旋向的螺旋形齿的转子。
同时，由于双螺杆压缩机受力不好，轴承受力大，其机械噪声也要比单螺杆压缩机要大。
At the same time, because of double screw compressor stress is bad, bearing load, its mechanical noise than single screw compressor.
因此，双螺杆压缩机与蜗杆压缩机相比，在相同转速下单位内排气次数少，气流脉动大，气流噪声大。
Therefore, double screw compressor and worm compressor compared, in the same speed of the units inside less number of exhaust air ripple, big air flow noise.
世界上没有永不磨损的机器，无论双螺杆压缩机还是蜗杆压缩机，在若干年后，均需对主机进行维修保养。
The world does not have never worn machine, no matter double screw compressor or worm compressor, in a few years, all needs to carry out the maintenance of the host.
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