Oil free vacuum pump is a kind of mechanical vacuum pump which can run without any oil lubrication. The oil-free vacuum pump can only be used with the cooperation of the front stage pump. It has a large pumping speed in a wide pressure range and is not sensitive to dust and water vapor in the extracted gas. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries.

Knowledge of oil free vacuum pump

Advantages and disadvantages

It has the advantages of simple structure, easy operation, convenient maintenance and no environmental pollution. The oil-free vacuum pump has good durability. It is a vacuum pump, compression and dual-purpose vacuum pump. It is a basic equipment with a wide range of applications to obtain vacuum.

Compared with oil pump, oil-free vacuum pump has low vacuum degree and small pumping capacity, but it is small in size, easy to install, easy to maintain, convenient to move, no oil fume and no pollution to the environment, especially in the laboratory with high requirements. It is also one of the most common equipment in the laboratory.

Therefore, when purchasing the oil-free vacuum pump, the vacuum degree required to work must be determined first. If the demand is high, the vacuum pump selected should be higher than the required vacuum degree. Otherwise, the vacuum pump can not meet the requirements of vacuum pumping, and the working requirements will not be met. Secondly, the pumping rate of oil-free vacuum pump should be slightly greater than the required pumping rate, so as to better meet the needs. Finally, see whether the extracted gas is corrosive. Corrosive gas will corrode the pump, so special materials must be used to meet the demand.

working principle

Its working principle is the same as that of general positive displacement pump. It is composed of stator, rotor, rotating blade, cylinder block, motor and other main parts. The rotor with rotating blades is eccentrically installed in the stator cylinder. When the rotor rotates at high speed, the four radial sliding blades in the rotor slot divide the pump chamber into four working rooms. Due to the centrifugal force, the rotating blades are close to the cylinder wall, separating the stator inlet and outlet. The operation is repeated to change the volume and discharge the inhaled gas from the exhaust port, so as to achieve the purpose of air extraction.

Knowledge of oil free vacuum pump

Scope of application

Oil free vacuum pump can be used in the following work:

1. Automatic packaging line of vacuum suction pull open bag, loading.

2. The vacuum suction of paper on a printing machine.

3. High efficiency vacuum filling of various liquids into bottles.

4. Vacuum blister forming of various plastic products.

5. Air tightness test of object surface in vacuum state.

6. Label of cartons and bottles, vacuum suction and paste.

7. Photographic plate making with fixed vacuum suction.

8. The gas analysis is guided by pressure difference in vacuum.

9. All kinds of medical machinery automatic line supporting use.

10. The vacuum chuck clamp is used for clamping non-magnetic parts on machining.

11. Leak detection test of various vessels under vacuum condition.

12. Application of food processing machinery.

13. Chinese and Western Medicine Factory vacuum distillation drying.

14. Vacuum suction in hospital operating room.

15. Laboratory gas analysis, physical and chemical experiments in colleges, research institutes, factories and mines.

16. The use of various medical instruments.

Use and maintenance methods

1. It should have sufficient and good ventilation conditions and an ambient temperature lower than 40 ℃.

2. Clean place without dust and dirt.

3. No water, oil and other liquids will fall on the pump.

4. Not directly exposed to the sun.

5. There is enough surrounding space to facilitate the inspection, maintenance and assembly and disassembly of the pump.

6. The pump must be mounted on a flat surface.

7. It is best to place the pump on a hard foundation similar to concrete. If there is no condition, the pump can also be installed firmly on the steel or wooden frame.

8. It must be ensured that the pump does not vibrate due to the foundation is not firm.

9. The connecting pipe with the pump should not be too long or smaller than the pump inlet diameter, which will affect the pumping speed. Pay attention to check whether there is air leakage in the vacuum connecting pipe.

10. When connecting wires, attention should be paid to the wiring requirements specified on the motor name plate. Three phase electric pump should pay attention to the motor rotation direction should be consistent with the direction of the marked arrow on the pump.