The difference between water ring vacuum pump and water ring compressor unit

Time：

2021-07-06

The working principle of the water ring vacuum unit and the water ring compressor unit is exactly the same, and the basic type and structure are also roughly the same. The difference lies in the following four aspects. Let's take a look at them together.

1. The circumferential speed range of the impeller is different

The circumferential speed of the impeller is mainly determined by the pressure difference between the suction chamber and the compression chamber. Since the suction pressure of the compressor is generally atmospheric pressure, and the discharge pressure of the vacuum pump is generally atmospheric pressure, the pressure difference of the compressor is large, and the required circumferential speed is also large. When the same water ring pump is used as a vacuum pump and a compressor, its performance is different. If the vacuum pump is used as a compressor, it can only work economically if the speed is increased accordingly.

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2. Different optimal compression ratio ranges

The so-called optimal compression ratio is a more efficient compression ratio. Generally speaking, the optimal compression ratio of vacuum pumps is higher than that of compressors.

3. Different shaft power

　When a water ring pump of the same size is used as a compressor, its effective power is greater than that of a vacuum pump. In addition, the circumferential speed of the impeller is generally selected according to the requirements of the vacuum pump, so when it is used as a compressor, it is in the low-efficiency zone, running, and the required shaft power is greater. Therefore, the matching power of the compressor is greater than that of the vacuum pump.

4. The structure of the gas-water separator is different

The air-water separator of the water ring vacuum pump is a flat-top type, and the overflow pipe is an ordinary water pipe. The top of the air-water separator of the water ring compressor unit is spherical, and the overflow pipe is controlled by a float regulating valve to prevent the compressed gas from escaping when the water level is lower than the overflow pipe, reducing the gas pressure and effective gas volume.

The above is a detailed introduction to the difference between the water ring vacuum pump and the water ring compressor unit. The main reason is that the different optimal compression ratio ranges are different, and the circumferential speed range of the impeller is different. The circumferential speed of the impeller is mainly determined by the pressure difference between the suction chamber and the compression chamber. Since the suction pressure of the compressor is generally atmospheric pressure, and the discharge pressure of the vacuum pump is generally atmospheric pressure, the pressure difference of the compressor is large, and the required circumferential speed is also large. Different shaft powers have different structures of gas-water separators. The gas-water separator of the water ring vacuum pump is a flat-top type, and the overflow pipe is an ordinary water pipe. The top of the gas-water separator of the water ring compressor unit is spherical, and the overflow pipe is controlled by a float regulating valve to prevent the compressed gas from escaping when the water level is lower than the overflow pipe, reducing the gas pressure and effective gas volume. If you have other related questions, please feel free to consult us.