Vacuum pump is a kind of rotary variable volume pump. It can be used only with the cooperation of the front stage pump. It has a large pumping speed in a wide pressure range. It is insensitive to dust and water vapor in the extracted gas. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries.

然而，通常情况下，真空泵排气孔喷油有两种原因所致：

However, in general, there are two reasons for the injection of vacuum pump exhaust hole

1、真空加油过量，导致真空泵在工作时真空油随排气口喷出。

1. When vacuum pump is working, the vacuum oil will be ejected with the exhaust port.

2、密封溶剂太大，选用的真空泵抽气速率太小。

2. The sealing solvent is too large and the vacuum pump is too low.

随着真空技术在各个应用领域的不断扩大，直联旋片泵的需求量越来越大。由于这种泵数量很多，加工装配工作量很大，价格又很低，所以有的国外真空厂商在中国建立专业厂。国产中小型直联旋片泵在技术上已经过关，价格又远比国外的泵便宜，所以国产泵仍然有竞争优势，关键是要解决轴封漏油以及旋片材料和真空泵油的性能质量问题，确保直联泵在高速、高温下性能稳定和运行可靠，同时还要进一步提高国产直联旋片泵抽除水蒸气的能力。

With the continuous expansion of vacuum technology in various application fields, the demand for direct coupled vane pump is increasing. Because of the large quantity of this kind of pump, the workload of processing and assembling is very large, and the price is very low, some foreign vacuum manufacturers have set up professional factories in China. Domestic small and medium-sized direct vane pump has passed the technical requirements and its price is much cheaper than foreign pumps. Therefore, domestic pumps still have competitive advantages. The key is to solve the problems of shaft seal oil leakage, performance and quality of rotary vane materials and vacuum pump oil, so as to ensure stable performance and reliable operation of direct coupled pump at high speed and high temperature, and further improve the steam extraction of domestic direct coupled vane pump Ability.