Among the parameters of micro vacuum pump, the concepts of "vacuum degree", "pumping rate" and so on are often mentioned.
The so-called vacuum refers to the gas state with pressure lower than 101325pa in a given space. In vacuum, the rarefied degree of gas is usually expressed by the pressure value of gas. Obviously, the smaller the pressure value is, the thinner the gas is.
There are all kinds of vacuum pumps in industry. There are prescribed test methods to test the performance of all kinds of pumps. The main parameters are as follows:
1. Limit vacuum (usually called vacuum degree): connect the vacuum pump with the detection container, put in the gas to be measured, and continuously pump for a long time. When the gas pressure in the container no longer drops and maintains a certain value, this pressure is called the limit vacuum of the pump. The smaller the value is, the closer it is to the theoretical vacuum.
The vacuum value (i.e. gauge pressure) measured by ordinary vacuum meter is the relative vacuum degree, which is expressed by negative number and refers to the difference between the measured gas pressure and atmospheric pressure.
2. Pumping rate: the volume of gas flowing through the suction port of the vacuum pump in unit time.
The volume of traditional industrial vacuum pump is generally large, and the work of the pump needs special vacuum pump oil and lubricating oil, and the medium gas will contain a lot of oil mist.
With the development of instrument industry and people's requirements for environmental protection, micro oil-free vacuum pump emerges as the times require. There are generally the following rules: the price of the pump is closely related to the vacuum index.
Vacuum index is the main index pursued by manufacturers all over the world. It reflects the overall strength of the corresponding mechanical processing, sealing technology, material science and other fields. It is also an important means for manufacturers to obtain profits. In order to improve the vacuum index, we must have higher sealing conditions, so we need to use parts with more accurate size and better material performance, so the production cost is greatly increased. Moreover, the increase of price is far greater than that of vacuum index. Of course, the increase of pumping rate will also cause the price to rise, but the increase is not large. Therefore, when choosing the micro vacuum pump, we need to seriously consider the vacuum index, pumping rate index, their own use, so as to give better consideration to the performance and cost.
Cisco scroll technology (Hangzhou) Co., Ltd. is engaged in the R & D, production and sales of high-performance scroll compressors and vacuum pumps. The company has a number of original invention patents, occupying the forefront of oil-free floating vortex technology innovation and application.
The company is one of the world's leading scroll technology innovation centers. In 2010, a domestic scroll technology R & D center was set up in Shanghai, China; a postdoctoral workstation was set up in Hangzhou to conduct personnel training and technology R & D jointly with high-level universities at home and abroad. In recent years, the company's R & D investment exceeds 10 million yuan, and maintains a high growth in R & D investment. Every year, the company can launch a number of new products according to the market needs. The company's self-developed floating scroll technology solves the long-standing reliability and stability problems of traditional fixed disturbance radius scroll technology, and makes the product performance reach a higher level. Our oil-free mechanical design makes our products and solutions more clean, energy-saving and environment-friendly.
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