1. When selecting a vacuum pump, the identified product should ensure that the various gases released in the process can be pumped out smoothly. In the application process of vacuum pump, there are a variety of gaseous media, such as flammable, explosive, easy to condense, easy to reverse, easy to corrode, etc. The selected vacuum pump must ensure its suitability. For example, a large amount of water vapor will be generated in the process, and the vacuum pump chosen must be suitable for water vapor extraction.
2. The ultimate vacuum of the vacuum pump must be higher than the vacuum required for process production, at least an order of magnitude higher, and the equipment is suitable for working within the required working vacuum range. The ultimate vacuum of a vacuum pump is the vacuum that can be achieved at a zero pump speed. Therefore, in order to ensure that the suction speed of the vacuum pump is within the working vacuum, it must meet the requirements that its ultimate vacuum degree is greater than the working vacuum, and a large suction speed is required in this range.
3. The pumping speed of the vacuum pump should be greater than the maximum displacement in the process. In order to ensure the vacuum level, if the selection of the vacuum pump involves continuous degassing in the process, the pumping speed of the vacuum pump or vacuum system should be greater than the maximum degassing speed in the process. If the system is equipped with a cold trap or baffle, the effective pumping speed with the addition of the trap or baffle should be greater than the maximum gas release in the process. If there is a sudden large amount of gas release during this process, the effective pumping speed of the system should be increased appropriately, usually 2-3 times the maximum gas release.
Fourth, the selection of vacuum pump, the selection of vacuum pump working medium and manufacturing materials must meet the process requirements. It is suitable for vacuum pump applications, especially in the fields of medicine, chemical industry, batteries, etc. The extracted medium is often corrosive gas, which requires corresponding anti-corrosion measures. For example, acidic and alkaline gases need to have corresponding anti-corrosion coatings, or the material of the pump is changed to stainless steel to prevent corrosion; For gases containing dust or particles, a dust collector, filter, or the pump itself should be added before the pump inlet, etc.
5. In the process of continuous production, the vacuum pump must meet the needs of continuous production. If necessary, a spare vacuum pump is set up that can be automatically replaced to reduce production interruptions caused by accidents. If less and less gas is released during the process, a maintenance pump can be set up to save energy and reduce consumption. Sixth, the use of vacuum pump is economical. In the process of vacuum pump selection, when a variety of vacuum pumps meet the process requirements at the same time, the economic analysis of cost and operating cost should be carried out, and the vacuum pump with good economy, reliable operation, small maintenance and easy use and maintenance should be selected.
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Precautions for the use of vacuum pump oil.
The service life of the vacuum pump is not only related to the quality of the vacuum pump itself, but also requires the user to use it in strict accordance with the specified requirements. How to use vacuum pump oil to share this question.
The uses of vacuum pump oil are as follows:
1. The oil window must be cleaned, and it is strictly forbidden to expose it to the sun and store it in the open air, and it should be stored in a dark, dry and ventilated place to prevent water and dust from mixing.
2. When taking oil or loading oil, the light rain around the barrel cover must be removed to prevent debris from mixing into the oil and causing wear and tear of the pump.
3. Vacuum pump oil of different brands and varieties cannot be mixed, and new and old oil cannot be mixed.
4. Strictly avoid mixing vacuum oil with other lubricating oils, let alone with light oil, otherwise it will affect the vacuum performance. 5. Vacuum pumps should avoid pumping solvents, water vapor and corrosive gases as much as possible. It must be used during regular inspections and the oil should be changed regularly.
6. When changing the oil, the old oil of the pump body should be used to discharge, and after injecting the new oil, slowly rotate the pump shaft, clean the pump chamber to discharge the residual oil, and clean it several times, such as clearing.
Wash it off and change to fresh oil.
7. When the pump is overhauled, all parts of the pump must be cleaned with solvent or cleaning agent, and the parts must be dried.
8. The refueling appliance must be dedicated and should not be present with other oil or solvent containers.
9. When mineral oil and vinegar oil or other synthetic oil are exchanged, the pump should be disassembled for thorough cleaning. All parts included must be immersed in ester oil to prevent contamination.
10. If inhalation of chemical gases and solvents, the pollution of vacuum pump oil must be cleaned during oil treatment.
Ten. 1. Oil change cycle:
1.When the vacuum degree of vacuum pump oil decreases and cannot meet the needs;
2.When the vacuum pump oil turns black and brown, it should be replaced.