1. Roots pump + water ring pump:
The function of the water ring pump in the unit is to create the reserve vacuum needed by the Roots pump. Generally speaking, the limit vacuum of the single-stage water ring pump is not high, but the pre-vacuum required by the roots pump produced in our country is high, so the single-stage water ring pump is not actually used as the front-stage pump of the Roots pump, and the two-stage water ring pump which can improve the limit vacuum is used. As a front stage pump, the double stage water ring pump can also improve the limit vacuum of the unit.
2. Roots pump + roots pump + water ring pump:
The limit vacuum degree of a Roots pump is lower, especially when it is combined with a water ring pump, the use range is limited, and the limit vacuum degree of the whole unit may be lower. But if two Roots pumps are connected in series with a water ring pump, the limit vacuum degree of the unit can be greatly improved.
3. Roots pump + roots pump + roots pump + water ring pump:
If two Roots pump and water ring pump can not meet the vacuum requirement, one Roots pump can be added. This kind of Roots water ring vacuum unit has been widely used in vacuum freeze-drying and other high vacuum technology.dry-screw-vacuum-pump-vacuum-distillation-process
2018年10月18日星期四
2018年10月17日星期三
Water ring vacuum pump principle
Water-ring vacuum pump because of its simple structure, low manufacturing accuracy requirements, easy processing and other related characteristics by many manufacturers like, super-high performance and affordable prices make it stand out among the many types of vacuum pumps, the following mini-series for your popular science about water-ring vacuum pump structure and working principle Related introduction.
Brief introduction of structure and working principle of water ring vacuum pump
1. The working principle is that the gas enters the vacuum pump or compressor through the pipeline through the valve, and then discharges into the gas-water separator through the air-guide bend pipe, and discharges through the gas-water separator exhaust pipe.vacuum-system-in-heavy-steel-industry-application
2. Water-ring vacuum pump (abbreviated as water-ring pump) is a kind of coarse vacuum pump. The limit vacuum it can obtain is 2000-4000Pa, and the vacuum degree of the vacuum pump unit can reach 1-600Pa. Water ring pump can also be used as compressor, called water ring compressor, is a low-pressure compressor, its pressure range is 1 ~ 2 *105Pa meter pressure.
Brief introduction of structure and working principle of water ring vacuum pump
1. The working principle is that the gas enters the vacuum pump or compressor through the pipeline through the valve, and then discharges into the gas-water separator through the air-guide bend pipe, and discharges through the gas-water separator exhaust pipe.vacuum-system-in-heavy-steel-industry-application
2. Water-ring vacuum pump (abbreviated as water-ring pump) is a kind of coarse vacuum pump. The limit vacuum it can obtain is 2000-4000Pa, and the vacuum degree of the vacuum pump unit can reach 1-600Pa. Water ring pump can also be used as compressor, called water ring compressor, is a low-pressure compressor, its pressure range is 1 ~ 2 *105Pa meter pressure.
Double stage rotary vane vacuum pump
The double stage rotary vane vacuum pump is mainly composed of pump body, rotor, rotary vane, end cover, spring and so on. A rotor is eccentrically installed in the cavity of the rotary vane pump. The outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between them). Two rotary vanes with springs are installed in the rotor slot, and the stator is divided into two working cavities (high and low working cavities).
When rotating, the top of the rotary vane keeps contact with the inner wall of the pump cavity by centrifugal force and spring tension. The rotor rotation drives the rotary vane to slide along the inner wall of the pump cavity, which makes the volume of the high-level working chamber expand periodically and suck air. The volume of the low-level working chamber reduces periodically and compresses gas with the help of the pressure of gas and oil. The exhaust valve is pushed off to achieve vacuum.dry-vacuum-pump
When the suction pressure is high (e.g. starting from atmospheric pressure), the gas is compressed in the high-level chamber and the pressure increases sharply, then part of the compressed gas is discharged directly from the auxiliary exhaust valve, and the other part of the gas is compressed and enters the low-level chamber through the interstage passage in the middle wall, and is discharged from the low-level exhaust valve after being compressed again. When the suction pressure is low (e.g. after a period of pump operation), the gas enters the high-level chamber from the suction port, and the pressure produced by the compression of the gas in the high-level chamber is not enough to push the auxiliary exhaust valve and directly enters the low-level working chamber through the interstage channel, and then discharges from the low-level exhaust valve after compression.vacuum-unit-high-vacuum-acquisition-equipment
When rotating, the top of the rotary vane keeps contact with the inner wall of the pump cavity by centrifugal force and spring tension. The rotor rotation drives the rotary vane to slide along the inner wall of the pump cavity, which makes the volume of the high-level working chamber expand periodically and suck air. The volume of the low-level working chamber reduces periodically and compresses gas with the help of the pressure of gas and oil. The exhaust valve is pushed off to achieve vacuum.dry-vacuum-pump
When the suction pressure is high (e.g. starting from atmospheric pressure), the gas is compressed in the high-level chamber and the pressure increases sharply, then part of the compressed gas is discharged directly from the auxiliary exhaust valve, and the other part of the gas is compressed and enters the low-level chamber through the interstage passage in the middle wall, and is discharged from the low-level exhaust valve after being compressed again. When the suction pressure is low (e.g. after a period of pump operation), the gas enters the high-level chamber from the suction port, and the pressure produced by the compression of the gas in the high-level chamber is not enough to push the auxiliary exhaust valve and directly enters the low-level working chamber through the interstage channel, and then discharges from the low-level exhaust valve after compression.vacuum-unit-high-vacuum-acquisition-equipment
2018年10月16日星期二
Rotary vane vacuum pump lubricant
Many users may ask this question: can rotary vane pumps use oil? The answer is not. Why should rotary vane pumps use the specified smooth oil?
Some rotary vane vacuum pump operators in order to save money and use the general oil instead of the use of vacuum pump special oil, which to a certain extent not only increased the use of vacuum pump, repair costs, but also seriously affected the service life of the vacuum pump.
1. vacuum pump special oil has a certain viscosity, the viscosity of the concavo-convex decision of the vacuum pump sealing, viscosity is too small, sealing is not good; too high viscosity, will increase the conflict between the pump blade and cylinder block strength, smooth effect will be worse, together, rotor rotation will become difficult, the pressure of the motor will change The higher the temperature, the higher the oil temperature. The increase of oil temperature will accelerate the emulsification degree of the pump oil, and really affect the concave and convex of the vacuum degree.
2.The chemical properties of special oil for vacuum pump tend to be more stable, and the contents of water, water-soluble acid, insoluble alkali and other impurities are much smaller. The use of special oil can avoid the doubts of replacing vacuum pump oil repeatedly and ensuring the cleanliness of the pump.
3. The saturated vapor pressure of the special oil of the vacuum pump is low and the evaporated light distillate is less. If it is a general vacuum pump oil or oil is very simple evaporation, the use of non-vacuum pump oil is often facing the situation of refueling.vacuum-pump-application-in-vacuum-degassing
Some rotary vane vacuum pump operators in order to save money and use the general oil instead of the use of vacuum pump special oil, which to a certain extent not only increased the use of vacuum pump, repair costs, but also seriously affected the service life of the vacuum pump.
1. vacuum pump special oil has a certain viscosity, the viscosity of the concavo-convex decision of the vacuum pump sealing, viscosity is too small, sealing is not good; too high viscosity, will increase the conflict between the pump blade and cylinder block strength, smooth effect will be worse, together, rotor rotation will become difficult, the pressure of the motor will change The higher the temperature, the higher the oil temperature. The increase of oil temperature will accelerate the emulsification degree of the pump oil, and really affect the concave and convex of the vacuum degree.
2.The chemical properties of special oil for vacuum pump tend to be more stable, and the contents of water, water-soluble acid, insoluble alkali and other impurities are much smaller. The use of special oil can avoid the doubts of replacing vacuum pump oil repeatedly and ensuring the cleanliness of the pump.
3. The saturated vapor pressure of the special oil of the vacuum pump is low and the evaporated light distillate is less. If it is a general vacuum pump oil or oil is very simple evaporation, the use of non-vacuum pump oil is often facing the situation of refueling.vacuum-pump-application-in-vacuum-degassing
2018年10月15日星期一
Pumping principle of turbo molecular pump
Turbo molecular pumps must work in molecular flow. Because when the pressure of the gas contained in a certain volume vessel is reduced, the mean free path of the gas molecule increases accordingly.
At atmospheric pressure, the average free path of the air molecule is only 0.06 micron, which means that a gas molecule may collide with the second gas molecule as long as it moves in space at 0.06 micron. At 1.3Pa, the mean free path between molecules can reach 4.4mm. If the mean free path is larger than the distance between the vessel walls, the collision probability between the gas molecules and the vessel walls will be greater than that between the gas molecules.vacuum-pump-oil
In the range of molecular flow, the average free path length of gas molecules is much longer than the distance between the blades of the molecular pump. When the wall is composed of a stationary stator blade and a moving rotor blade, more gas molecules will be injected into the rotor and stator blades, laying the foundation for the formation of the directional movement of gas molecules.
At atmospheric pressure, the average free path of the air molecule is only 0.06 micron, which means that a gas molecule may collide with the second gas molecule as long as it moves in space at 0.06 micron. At 1.3Pa, the mean free path between molecules can reach 4.4mm. If the mean free path is larger than the distance between the vessel walls, the collision probability between the gas molecules and the vessel walls will be greater than that between the gas molecules.vacuum-pump-oil
In the range of molecular flow, the average free path length of gas molecules is much longer than the distance between the blades of the molecular pump. When the wall is composed of a stationary stator blade and a moving rotor blade, more gas molecules will be injected into the rotor and stator blades, laying the foundation for the formation of the directional movement of gas molecules.
Roots vacuum pump rotor
Roots Vacuum Pump as a necessary supporting equipment in the unit, is more important in all respects, although the production of Roots Pump is a conventional product, but also in the deep processing of the product should be in place, for the rotor technology should also be further improved than the previous stage, only to ensure that the Roots Pump products Performance, in the use of the unit to show the proper performance, performance will play out the overall performance of the unit, conducive to supporting the production process of enterprises.
Increasing the technological improvement of Roots vacuum pump rotor is to improve the overall performance of the pump. As long as the quality of the main components is reliable, coupled with strict process requirements and assembly quality, the use of the pump is very consistent with the standards, there will be no abnormalities, in the normal production process can play a good role. Use to enhance the practicability of the unit. Therefore, the process is very important for the integrity of the pump, the times are progressing, the process should also be improved, only advanced technical ability to adapt to the development of products.
Roots vacuum pump is also tightly dependent on advanced technology to achieve today's success, only to refine the product, can have room to play, can effectively provide the enterprise with room for development, this is the product ductility, but also the most important part of the enterprise.molecular-pump-application-in-energy-saving-lamp-manufacturing-process
Increasing the technological improvement of Roots vacuum pump rotor is to improve the overall performance of the pump. As long as the quality of the main components is reliable, coupled with strict process requirements and assembly quality, the use of the pump is very consistent with the standards, there will be no abnormalities, in the normal production process can play a good role. Use to enhance the practicability of the unit. Therefore, the process is very important for the integrity of the pump, the times are progressing, the process should also be improved, only advanced technical ability to adapt to the development of products.
Roots vacuum pump is also tightly dependent on advanced technology to achieve today's success, only to refine the product, can have room to play, can effectively provide the enterprise with room for development, this is the product ductility, but also the most important part of the enterprise.molecular-pump-application-in-energy-saving-lamp-manufacturing-process
Vacuum pump price
Vacuum pump is a kind of equipment that every manufacturer will buy, and the price is a very important factor in the choice of time, in fact, its price will be affected by many factors in practice, then what specific include? The following vacuum pump manufacturers will introduce to you:
First, for the same parameters, category of vacuum pump brand is the main factor affecting the price, because this is not only a simple name, but also represents the post-sale and maintenance work, which is now very much valued by everyone.
Two, for the equipment itself, because of different materials, the price deviation is bigger, for example:
1. Stainless steel: Stainless steel has strong corrosion resistance and high tensile strength, so the wall thickness of the parts can be relatively thin, thus further reducing the cost. The price is relatively cheap.vacuum-pump-oil-price
2. Cast iron: the price is relatively cheaper, the drawback is easy to be corroded, parts thick, we can choose according to their actual use.
3. Copper alloy: Strength is about 1/2 of stainless steel castings, so the thickness of the two parts is much thicker than the wall thickness, so that its weight is heavier, is also one of the reasons for the higher price of parts.Dry-vacuum-pump-manufacturer
First, for the same parameters, category of vacuum pump brand is the main factor affecting the price, because this is not only a simple name, but also represents the post-sale and maintenance work, which is now very much valued by everyone.
Two, for the equipment itself, because of different materials, the price deviation is bigger, for example:
1. Stainless steel: Stainless steel has strong corrosion resistance and high tensile strength, so the wall thickness of the parts can be relatively thin, thus further reducing the cost. The price is relatively cheap.vacuum-pump-oil-price
2. Cast iron: the price is relatively cheaper, the drawback is easy to be corroded, parts thick, we can choose according to their actual use.
3. Copper alloy: Strength is about 1/2 of stainless steel castings, so the thickness of the two parts is much thicker than the wall thickness, so that its weight is heavier, is also one of the reasons for the higher price of parts.Dry-vacuum-pump-manufacturer
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