Overall arrangement structure and installation of vacuum pump

Now the field of vacuum pump is becoming more and more extensive, so now there are more kinds of products. Now with the continuous development of vacuum technology and the requirements of scientific research field for its pressure are becoming wider and wider. Basically, the vacuum pumping system composed of several vacuum pumps can meet the production after common pumping. 

At present, the departments concerned are quite familiar with the working pressure range of the vacuum pump, so any type of vacuum pump will not be fully applicable to all working ranges, and different types of vacuum pumps can only be selected according to different working requirements and pressure ranges.

In order to be more convenient to use, vacuum pumps with different performance will be combined according to their different requirements in the process of vacuum technology. The use of products is an essential main pump in the application of vacuum technology in various industries of our national economy.

The overall layout structure of the vacuum pump will directly determine the overall structure of the pump. The vertical structure, the horizontal device of the air inlet and exhaust port and the connected pipeline are more convenient, but the center of gravity of the pump is relatively high when it is used, so its stability performance will be poor when it is running at high speed.

When the horizontal pump is installed, its exhaust port needs to be below, while the air inlet needs to be above. Sometimes, in the process of installation, for the convenience of system pipeline installation and connection, the exhaust port can be connected from the horizontal direction, and the direction of air inlet and exhaust is perpendicular to each other.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Concept of critical compression ratio of water ring vacuum pump

 When the operating condition of water ring vacuum pump exceeds the critical contraction ratio, how to modify the internal structure to reduce the air loss of the pump to the minimum and the performance of the pump to achieve the optimal, which has important reference significance for application and system transformation. 

As a variable volume gas delivery equipment, water ring vacuum pump can not only be used as a vacuum pump to remove gas to make the system obtain negative pressure, but also as a tightening machine to tighten the gas so as to make the system get positive pressure. However, whether it is a vacuum pump or a tightening machine, its internal water ring volume changes and completes the suction and exhaust principle is the same, so the work of water ring pump in different states is fundamental It can be divided into several stages.

The working principle of water ring vacuum pump is to use eccentric impeller device in the pump body. The impeller rotates to throw the water in the pump cavity to the surrounding. The water ring with different thickness is formed in the pump cavity. The water ring and adjacent blades form an alternating space to complete the suction and exhaust function. The gas delivery channels are crescent shaped spaces designed on the disk, but their functions are not only "channels". The influence of the opening size and position of the suction and exhaust holes on the pump performance is very obvious. The suction volume of the vacuum pump decreases with the increase of the contraction ratio. When the critical contraction ratio is exceeded, the efficiency of the water ring pump will obviously decline.

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Vacuum gauge commonly used in semiconductor operation

The common vacuum gauges in semiconductor industry include resistance vacuum gauge (Pirani vacuum gauge), thermocouple vacuum gauge, capacitance vacuum gauge, electric ion vacuum gauge, cold cathode ionization vacuum gauge and full range vacuum gauge. The cold cathode ionization vacuum gauge can be divided into penning gauge, magnetron gauge and anti magnetron gauge. 

Full range vacuum gauge is a combination of low vacuum gauge and high vacuum gauge; resistance vacuum gauge has wide measuring range and is commonly used; thermoelectric vacuum gauge has narrow vacuum measuring range and simple structure, which is not easy to be damaged; the measurement value of capacitance vacuum gauge is not affected by gas variety; ionization vacuum gauge belongs to high vacuum gauge and will generate heat; cold cathode ionization vacuum gauge belongs to high vacuum gauge, which is not hot and easy to repair; Full range vacuum gauge active range switching, easy to use. 

Most of today's vacuum gauge probes and signal processing circuits work together, which enables anti-interference ability and promotes its miniaturization. Most probes use metal material instead of glass material, which is more robust and delicate. The vacuum gauge display controller also requires miniaturization. Some of them have a volume of 105mmx110mmx250mm and a mass of 1.3KG, with three connectors. Each connector can be connected with a resistance vacuum gauge or a cold cathode ionization vacuum gauge. This intelligent vacuum meter controller is easy to carry and use.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Knowledge of vacuum pump shell material

There are many kinds of vacuum pump materials, such as metal alloy, ceramic, rubber plastic, glass quartz, carbon fiber and so on. And the vacuum pump shell material is mainly two categories: metal and glass. 

As the material of vacuum shell, metal mainly includes iron, copper and aluminum based metals and various alloys, such as low carbon steel, stainless steel, oxygen free copper, red copper, aluminum and steel or iron materials coated with aluminum, copper and nickel. They have good mechanical strength and machinability. Various metal materials have different performance and outgassing rate according to different vacuum application characteristics. The physical and mechanical properties of various metal alloys can be inquired.

Glass is mainly used in some glass vacuum system (such as glass diffusion pump, valve), observation window and some regulatory shell, high-voltage electrode insulator, etc. it has the advantages of transparency, low price, easy processing and insulation, but the disadvantage is low strength and fragile. According to the different softening temperature and expansion coefficient, there are soft glass, hard glass and quartz glass with different properties.

Whether it is metal or glass, the shell material of vacuum pump needs to have: certain mechanical strength and stiffness, which can ensure that it can withstand atmospheric pressure at normal temperature and baking temperature without deformation; good air tightness, without defects such as porous structure, cracks and other leakage; low gas outlet rate and penetration rate; low saturated vapor pressure under working temperature and baking temperature It has good chemical stability, is not easy to oxidize and corrode, and will not react with the working medium in the system; it has good temperature stability and can maintain its vacuum performance and mechanical property within a certain temperature range; it is easy to process, has good welding performance and good economy.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces 

Characteristics of large vacuum pump and micro vacuum pump

With the rapid development of China's economy, the demand for vacuum pump in industry and other fields is growing. In the face of fierce competition in the vacuum pump market, how should users choose their products? What is the difference between large vacuum pump and micro vacuum pump. 

The characteristics of large vacuum pump: high power, high limit vacuum, but high price, large volume, large weight, high noise, high energy consumption, need regular maintenance, not easy to move, etc. Some must use vacuum pump oil or lubricating oil, which will produce oil mist in work, but it will be wasted in low vacuum situation. For example, in the laboratory, only a small amount of gas needs to be sampled, analyzed, circulated, vacuum adsorbed, gas transferred, pressurized, indirectly absorbed water and drained by pump, many disadvantages of large vacuum pump have been exposed. So how to reduce these shortcomings is a very difficult job for professional staff, but it is still worth our expectation.

Micro vacuum pump features: small size, low noise, low power consumption, easy to operate, easy to carry, maintenance free, 24-hour continuous operation, also allows the medium rich in water vapor. The most important thing is that it is dry and oil-free and does not need vacuum pump oil or lubricating oil, so it will not pollute the working medium and interfere with the analysis of medium. And the price is much cheaper.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Mixing principle of vacuum pump oil

According to the understanding of the vacuum pump factory: at present, the vacuum pump oil is not supplied in time in the market or there is a lack of suitable varieties in the market. Sometimes, there are problems of mixed use of vacuum pump oil in the process of using, including domestic oil and foreign oil, different types of oil in domestic oil, different manufacturers or different brands of the same kind of oil, mixing of new oil with "old" oil in use, etc. 

At present, many users have a lot of randomness in choosing alternative oil or mixed use of vacuum pump oil. However, it should be noted that different types of vacuum pump oil have different physical and chemical properties. Its chemical composition, viscosity, acid value and various additives (anti-wear agent, preservative, antioxidant, rust inhibitor) and other main components and indicators directly affect the operation of the machine. Zhaoqing vacuum pump factory is located here The improper use of the pump will not only remind the user of the use of oil, but also change the service life of the pump. Therefore, the following principles should be observed when using the mixed oil.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Water supply regulation of water ring vacuum pump

 Water ring vacuum pump plays a very important role in our life, because it occupies a great position in industry and agriculture, which not only benefits from its simple and easy operation, but also its high efficiency is also an important point. In these applications, it plays the role of vacuum extraction, and the use can be reflected by the water supply, so how to adjust its water supply? 

1. Since the water supply of vacuum pump has a certain range, in order to obtain the standard water supply and save water, the water supply valve can be adjusted according to the program. 2. When the water ring vacuum pump operates normally, open the water supply valve properly, and then observe the pressure of the inlet vacuum gauge. 3. Slowly turn down the opening of the water supply valve. When the pointer of the vacuum gauge starts to fluctuate or drop, the water supply is not enough. Open the water supply valve again slowly. When the pointer of the vacuum gauge is stabilized again, the water supply is the standard water supply.

Here we should pay attention to that when the water supply is insufficient, the pumping capacity of the equipment will decrease, and the work will be unstable. If the water supply is too much, it will cause waste of water resources, increase the shaft power of the pump, and even burn out the motor.


CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Key points of single stage rotary vane vacuum pump

Single stage rotary vane vacuum pump is also called XD rotary vane vacuum pump. Generally, single-stage rotary vane vacuum pump oil conforming to sh0528-92 specification should be used for single-stage rotary vane vacuum pump. Single stage rotary vane vacuum pump oil with ISO ~ vg100 viscosity grade at ambient temperature of 10 ℃ ~ 40 ℃. When the ambient temperature is 0 ℃ ~ 10 ℃, the vacuum pump oil of ISO ~ vg32 viscosity grade is used. When the vacuum pump is running, the oil level must be 1 / 2-4 / 5 of the oil window height. 

Oil level and oil contamination should be checked regularly (once a week is recommended). If the oil level is too low, the single-stage rotary vane vacuum pump should be stopped and suitable vacuum pump oil should be 4 / 5 of the oil window height. If the oil is polluted, the oil will be blackened, emulsified and thickened, and the oil should be changed in time. The single-stage rotary vane vacuum pump is recommended to change oil after 150 hours of operation for the first time. After that, change the oil every 500 hours. At the same time, the oil filter should be changed. If the oil is polluted, blackened, emulsified and thickened, the oil should be changed in time. Clean the pump before adding new oil. 

In the cleaning and oil changing steps, stop the single-stage rotary vane vacuum pump and drain the hot oil. Screw on the drain plug and run for 5 ~ 10 seconds. Drain the oil completely. Fill cleaning oil (No. 32 ordinary machine oil) to 3 / 4 of oil window height. Run the single-stage rotary vane vacuum pump for 5-10 minutes. Stop the pump and drain the oil. If the oil cannot reach the request, repeat steps 4 and 5. Screw on the drain plug and run for 5 ~ 10 notes.

If the temperature of the pump rises obviously, the motor current reaches or exceeds the rated current, and there is oil smoke at the exhaust port of the pump, it is necessary to check whether the exhaust filter is blocked. If it is blocked, it should be replaced in time. The exhaust pressure gauge can be installed at the oil filling hole of the pump to check whether the filter is blocked. When the pressure exceeds 0.6 bar (gauge pressure), change the exhaust filter.

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Maintenance of oil free vacuum pump

Oil free vacuum pump is a kind of mechanical vacuum pump which can work without any oil for smooth operation. The utility model has the advantages of simple structure, convenient operation and maintenance, and no environmental pollution. Oil free vacuum pump is a durable vacuum pump. It is a vacuum pump for vacuumizing, tightening and dual-purpose. It is the basic equipment to obtain vacuum and has a wide range of applications. Compared with the oil pump, the oil-free vacuum pump has the advantages of low vacuum degree, small volume, convenient installation, simple maintenance, easy to move, no oil fume and no environmental pollution. 

This is one of the most common devices in the laboratory. Therefore, when purchasing an oil-free vacuum pump, it is necessary to confirm the work request of vacuum degree. If the vacuum degree is high and the vacuum degree is higher than the requested vacuum degree, or the vacuum degree cannot be satisfied, the work request cannot be satisfied. The second is the pumping speed of oil-free vacuum pump, which will be slightly higher than the requested pumping speed in order to better meet the demand.

Finally, to see whether the gas can be corrosive and whether the corrosive gas can corrode the pump, special data must be used to meet the demand. The working principle of edit pump is the same as ordinary positive displacement pump. It is composed of stator, rotor, rotor, cylinder, motor and other main components. When the rotor rotates at high speed, the four radial sliding rotors in the rotor slot divide the pump chamber into four chambers.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Development of water ring vacuum pump

As we all know, water ring vacuum pump and water ring compressor are widely used in all walks of life because of their simple structure and convenient maintenance. Especially with the characteristics of isothermal compression, it is easy to pump and compress flammable and explosive gases.

In recent years, many large-scale capital construction and technological transformation projects have been launched in China. The real children of these projects need a lot of PVC materials. Especially the prosperity of real estate has promoted the development of PVC industry. According to the statistics of chlor alkali industry, China produced 4.1 million tons of PVC last year and imported 200 tons. According to the forecast of the industry, the national demand will reach 8 million tons in 2005, and 15 million tons in 2010. It is precisely because of the rapid increase in demand that the enterprises in the chlor alkali industry in China will be transformed and expanded, and many new enterprises have been established in the past one or two years. For the development of chlor alkali enterprises, water ring air pump and water ring compressor must be equipped. The largest water ring vacuum pump and water ring compressor used to pump and compress acetylene and hydrogen were only 30m3 / min in the past. However, the enterprises with an annual output of 100000 tons of caustic soda and 100000 tons of PVC now need more than 70m3 / min of water ring vacuum pump and water ring compressor.

For a long time, when the suction pressure is 1 atm or slightly lower than the upper pressure, the discharge pressure is 0.1MPa, that is, the compression ratio is 2. Some enterprises have produced water ring compressors with discharge pressure up to 25mpag, and only 1-2 specifications. In order to adapt to the production of polyvinyl chloride, 91 former State Council major equipment office put forward the research and development of vinyl chloride recovery water ring compressor in the "Eighth Five Year Plan" major technical equipment research and development of 4 tons of low polymerization degree PVC equipment. This kind of water ring compressor for recovery of vinyl chloride monomer requires that the discharge pressure be under normal pressure or micro negative pressure The force should reach 0.55-0.6mpag and the displacement should reach 700m3 / min.

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dry screw vacuum pump market potential

dry screw vacuum pump market potential

At present, the application of dry screw vacuum pump is very extensive, and the demand is infinite, so the development prospect of dry screw vacuum pump is also excellent, mainly from these aspects. The development prospect of the total dry screw vacuum pump is very good.

In the future, for the oil industry in oil production, oil transportation and oil refining, the demand for high-efficiency water injection pump, heavy oil pump, oil pipeline pump and screw pump will increase greatly, and the demand for different types of industrial pumps will be about 140000-150000 sets. For the three chemical pumps, the market for large-scale fertilizer Methylamine Pump, large and medium-sized high-temperature and high-pressure magnetic pump, and special material non-metallic chemical pump will also expand, and the demand for all kinds of chemical pumps will be 100000-120000.

At present, the model of dry screw vacuum pump is used in many working occasions. The whole adaptability of dry screw vacuum pump is strong and its efficiency is high. Recently, the design trend of dry screw vacuum pump is mainly designed for specific working conditions, which is more targeted, and the designed screw pump has high efficiency.

Dry screw vacuum pump is widely used in many industries, such as chemical plants, mines, pharmaceutical plants, food factories and so on. Now, the application of dry screw vacuum pump is very extensive, the demand is infinite, so the development prospect of dry screw vacuum pump is excellent, mainly from these aspects.

1、 With the development of industry, the application of dry screw vacuum pump is larger, and the service life of dry screw vacuum pump is longer;

2、 This kind of dry screw vacuum pump is a better one at present. It will be used for a long time in the future, and it is unique. It is difficult to replace other equipment.

industrial vacuum pumps,vacuum furnaces
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How to clean the scale of water ring vacuum pump

The work of water ring vacuum pump is related to water, and it is easy to get scale after a long time. The appearance of scale is easy to affect the normal use of water ring vacuum pump. Then, how to clean the scale of water ring vacuum pump?

1. Traditional cleaning methods, such as mechanical methods (scraping, brushing), high-pressure water, can clean the equipment, but in the specific cleaning process, we should pay attention to many aspects, and hope our manufacturers can pay attention to them.

2. A small amount of dilute sulfuric acid is used to etch the scale in the pot several times, so that the residual acid can be washed out with clean water after the scale is removed. When acid pickling is used, the quantity and concentration shall be less (about 30%); attention shall be paid to safety to prevent acid from touching human body and clothes and corroding kettle.

The above is the main content of how to clean the scale of water ring vacuum pump

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How to operate roots vacuum pump better

How to operate roots vacuum pump better?

Roots vacuum pump unit has been applied in metallurgy, petrochemical industry, paper industry, food industry, electronic industry, etc. the application range of Roots vacuum pump is extremely wide. Many users are specially equipped with one or several standby pumps, and some of them are temporarily placed due to the long-term non operation of the project. In this case, there is a very important issue to be noted, which is also to ensure roots A standard of vacuum pump life is that the long-term idle equipment should empty the cooling water in the pump cavity in time to protect the pump itself.

The actual production of Roots vacuum pump is carried out through various processes. While strengthening the quality of blank, it is also necessary to strictly carry out the process of deep processing. For the emergence of waste products, it is necessary to timely make a management system conducive to production. Without affecting its order production, it is necessary to effectively deal with the waste parts, and control the working hour quota, and do a good job in these bases On the basis of basic work, we should timely respond to the needs of the market and strengthen the optimization of product processing technology. How to operate roots vacuum pump better?

The application strength of Roots vacuum pump has become an important condition for promoting the development of enterprise productivity. It has different application capabilities for its application in different industries, but the same thing is that it can not be used as a single pump, but can only be used as a unit product assembled with other equipment, which plays a mutual driving strength foundation. Through its own application performance, it can be effective For the use of other equipment to achieve a higher performance strength, improve the driving effect of product use.

Under the premise of speeding up the development of practical effect of Roots vacuum pump, we should make the strength of product application and performance continuously reflected, further enhance the improvement of product advantage, let the application of product drive the development of enterprise productivity, promote the continuous improvement of application performance in all aspects, fully accelerate the driving of product application ability, and make it continuously reflected on the basis of reasonable application The outstanding performance of the product application effect reflects the applicable performance of the equipment.

In order to improve the quality of Roots vacuum pump, it is necessary to improve the development of its overall application strength in combination with the application of the product, and constantly realize the overall drive of the product application ability, so that it can enhance the continuous improvement of its quality advantage under the function of reasonable application, and make it reflect the internal application advantage in the development process.

VACUUM FURNACE

industrial vacuum pumps,vacuum furnaces

Heat treatment equipment

Vacuum pressure impregnation equipment

The design is generally divided into four sections during the design of the vacuum pressure dip coating section: the dip-coating zone, the machine room, the control room and the drying room zone. Under the premise that the fire rating of the vacuum pressure dipping zone is determined, in order to design and construct the plant economically and reasonably, it is necessary to design the plant in a sub-region.

According to the design specifications for electrical installations in fire hazard environments, the explosive atmosphere shall be partitioned according to the frequency and duration of the explosive gas mixture as follows:

Zone 0: an environment in which continuous or long-term explosive gas mixtures occur;

Zone 1: An environment in which a gas mixture may explode during normal operation;

Zone 2: An environment in which an explosive gas mixture is unlikely to occur during normal operation, or an environment where only a short-lived explosive gas mixture is present, even if it occurs.

The immersion paint tank and the paint storage tank are arranged in the immersion paint zone, and the entire varnishing process of the motor is completed in the varnishing zone. The paint storage tank is a tank for storing insulating paint. Under normal circumstances, the lid of the paint storage tank will not open, and the tank is in a vacuum state. If the tank is not filled with an inert gas such as nitrogen, then the paint liquid in the paint storage tank The surface is a continuous release source. The dip-coating tank is a jar of motor immersion paint. The motor is hoisted in the immersion paint tank after vacuuming, painting, pressing, painting, and painting. Before the can lid is opened, the residual styrene vapor in the dip tank is pumped to the exhaust gas purification treatment device through the suction device of the tank body and the tank mouth, and is discharged at a high altitude, even though a small portion may be volatilized into the ambient air of the dip tank. It is only a short time.

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liquid ring vacuum pump working fluid

When the impeller of the liquid ring vacuum pump rotates, the water is thrown around by the impeller. Because of the action of centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. In the working process, the suction port is connected with the pumped system, and the system is sucked to form a vacuum. The pump body is equipped with a proper amount of water called working fluid. There are some matters needing attention in its operation.piston-vacuum-pump-in-vacuum-tube

1. The working fluid is usually clean water at room temperature. If the water quality is easy to scale, it should be softened and reused.
2. During operation, part of the working fluid in the liquid-ring vacuum pump will be continuously supplied to the liquid-ring vacuum pump as the gas is discharged.
3. When using different working fluids, it is necessary to pay attention to the material of the flow passage parts.
4. When the working fluid is clean water at room temperature, the working water at lower temperature should be used as far as possible.
5. The working fluid should not contain solid particles, if mixed with dirt or particles, filters should be installed on the feeding pipeline to prevent parts from wearing or impellers from being jammed in the liquid ring vacuum pump.

The liquid ring vacuum pump has many advantages, such as close to isothermal compression, insensitive to dust, gas inhalation can entrap liquid or a large amount of water vapor, etc. It has been widely used in power, petrochemical, pharmaceutical and other fields. The working fluid in the pump body not only plays the role of forming liquid ring, but also takes away the heat of gas compression and the clearance between the sealing distribution plate and the impeller end face. Pay attention to some operating requirements of working fluid, which is also beneficial to equipment.vacuum-system-in-aviation-industry

Oil-free vacuum pump manufacturers

The oil free vacuum pump is a mechanical vacuum pump that does not need any oil to lubricate. The utility model has the advantages of simple structure, easy operation, convenient maintenance, and no pollution to the environment. Oil-free vacuum pump has good durability, is a vacuum pumping, compression, dual-purpose vacuum pump, is a very wide range of applications to obtain vacuum basic equipment.

Compared with oil pumps, oil-free vacuum pumps have low vacuum and small pumping capacity, but they are compact, easy to install, simple to maintain, convenient to move, no smoke, no pollution to the environment, especially in laboratories with higher requirements. It is also one of the most permanent equipment in the laboratory.vacuum-pump-application

Therefore, when choosing and purchasing oil-free vacuum pumps, we should first determine the vacuum required to work. If the demand is high, the vacuum pumps selected should be higher than the vacuum required. Otherwise, it will not meet the requirements of vacuum pumping, and it will not meet the working requirements. Secondly, the pumping rate of the oil-free vacuum pump should be slightly higher than the required pumping rate when selecting the type, so as to better meet the needs. Finally, see whether the extracted gas is corrosive, corrosive gas will corrode the pump, we must use special materials to meet the demand.liquid-ring-vacuum-pump-installation