Operating characteristics of vacuum unit

In the process of application of vacuum pump unit, its main role is to improve the vacuum degree of vacuum system and the pumping speed under high vacuum environment. Since there is no gas contraction in the operating process of roots pump, when roots pump directly discharges into the atmosphere, the pressure difference between suction port and exhaust port is too large, which will overload the vacuum pump. If the power of vacuum pump motor is simply increased, it will constitute a vacuum pump Heat causes the tiny gap between the vacuum pump rotors to be quickly blocked by heat shrinkage. 

In order to ensure that the vacuum pump unit can reach a higher vacuum, it is necessary to ensure the gap between the vacuum pump rotors. Therefore, it is necessary to set up a front stage pump when the vacuum pump is used. The vacuum pump can be started when the pressure in the system is pumped to a certain range with the front stage pump, so as to avoid overload of the vacuum pump. The front stage pump can choose screw vacuum pump, rotary vane vacuum pump, scroll vacuum pump and other vacuum pumps which can discharge air directly.

Under normal conditions, the vacuum degree of a single screw vacuum pump can be better than 2-3 water ring or reciprocating vacuum unit. If the demand still insists on higher pumping speed in high vacuum environment, it is recommended to use with vacuum pump. Our vacuum pump adopts hydraulic coupling planning, which can start the unit at the same time under normal pressure. Due to the early intervention of the pump, the pumping speed of our unit is increased by more than 30% compared with the traditional unit.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

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

The material transportation uses the jet device

At present, pneumatic jet, a kind of powder conveying device, has appeared in the market, and how powerful its claimed function is. The principle of its use is to use the "Venturi principle" jet principle to drive the flow of high-pressure gas in the pipeline to form a vacuum, so that powder can be sucked. 

However, the application of the jet device has low vacuum degree, low material suction height, high gas consumption and low efficiency. 

The water ring vacuum pump is very practical in material transportation. Many people do not understand the installation points of water ring vacuum pump and the requirements of material pipeline. Through collecting the actual requirements of users, a variety of water ring vacuum pump material transportation systems are designed, which are simple, convenient, environmental protection and fully adapt to the needs of material transportation in various industries.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces 

Pressure parameters of vacuum system

Pressure parameter can be seen everywhere in vacuum system, which refers to the vertical force of gas on the surface of solid or liquid, and it is synonymous with pressure in vacuum system.

The most common pressure parameter is naturally the limit pressure. Limit pressure is one of the main parameters of vacuum pump performance in vacuum system. Popular understanding is that in the process of vacuum system pumping, after a long time of pumping, when the pumping speed of vacuum pump or vacuum unit is 0 or the pressure parameters of vacuum chamber are always maintained at a certain value, that is the limit pressure of vacuum pump or vacuum unit.

The second is work pressure. Working pressure is the pressure parameter necessary to ensure the process implementation and product quality in the enterprise production process. In the process of vacuum equipment selection, in order to meet the process requirements, the limit pressure of the equipment will be about an order of magnitude lower than the working pressure.

Foundation pressure. In some process fields or technicians, the base pressure is also called background pressure, which refers to the pressure in the vacuum chamber when the production process begins to be implemented. For example, magnetron sputtering applications may need to pump the local pressure to 10-4 PA, while the working pressure of sputtering process may be about 1 PA.

Residual pressure. In some cases, residual pressure is the same as the limit pressure, which refers to the total pressure of residual gas in the vacuum chamber after a period of pumping operation of vacuum pump or vacuum unit. If the vacuum system has no pumping speed at this time, the residual pressure is the limit pressure of vacuum pump or vacuum unit.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Regeneration of cryogenic vacuum pump

Unlike other gas transfer pumps, cryogenic pumps will be saturated in the process of gas capture, so it is necessary to release the adsorbed trapped gas to recover the trapping capacity, which is called regeneration process. 

The regeneration of cryogenic vacuum pump includes partial regeneration (only releasing the gas adsorbed by the secondary cold plate) and total regeneration (releasing all the gas adsorbed by the cold plate). This paper is to understand the low temperature pump regeneration of several ways.

In the regeneration process of cryogenic vacuum pump, the released gas needs to be removed in time to prevent possible damage to the pump body or the glass tube shell of vacuum gauge, or even explosion. Because when the temperature rises to a certain temperature, the desorption speed of the permanent gas is very fast, and the pressure in the pump body can be increased to more than one atmospheric pressure in a few minutes.

Roots Vacuum Pump In Vacuum Metallurgy Industry

Vacuum Pump Heat Dissipation And Cooling Techniques

Water Ring Vacuum Pump In Gas Drainage Pumping Station 

Scroll vacuum pump

The research of vortex vacuum pump began in the late 1980s. A vertical self rotating oil lubricated scroll water ring vacuum pump with pumping speed of 200L / min was developed. Compared with revolution type vortex vacuum pump, the radial clearance of the pump has the advantages of easy sealing and control. Compared with the vane pump, the scroll pump has higher volumetric efficiency, and the vibration and noise levels in the pump are reduced. In addition, due to its more compact structure, the weight and volume of the machine are reduced by 12% and 40% respectively. The research shows the high efficiency of the scroll vacuum pump, and puts forward the effective methods of how to eliminate the clearance volume and control the clearance. With the continuous expansion of the application of vortex vacuum pump in semiconductor industry, people began to devote themselves to the research of dry scroll vacuum pump. The difference between dry scroll vacuum pump and oil lubricated scroll vacuum pump is that there is no oil and liquid in the pump cavity. Therefore, to solve the problem of sealing and cooling in the pump is the key to the research of dry scroll vacuum pump. 

The ultimate pressure that the pump can reach is 5 × 10 - 3T. It uses water cooling method to solve the lubrication and cooling problems of various parts in the pump. The research shows the feasibility of the dry scroll vacuum pump, and effectively solves the problems such as the contact caused by the thermal deformation of the moving disk and the vibration caused by the centrifugal force. Although the cooling problem of dry scroll vacuum pump can be effectively solved by using water cooling method, the structure of the cooling water circuit is more complicated. Two cooling fans are installed on the main shaft, which are respectively located at the ends of the two stationary disks. When the main shaft rotates, the fans rotate together to achieve the cooling effect on the vortex disk. At the same time, it adopts a semi closed structure to solve the cooling problem of the motor. The pump adopts a totally enclosed structure, the vortex disk is a single vortex ring structure, and the cooling fan is installed at the end of the static disk.


Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Development and classification of imported vacuum pump oil

After many years of polishing, China's vacuum technology has made rapid development. At present, it has become an independent basic science with the continuous development of many industrial companies, such as aerospace science, vacuum coating, vacuum smelting, high energy physics, controlled thermonuclear reaction, surface research, etc. The progress of science and vacuum technology is interdependent. As a special lubricating oil for various mechanical vacuum pumps, the imported vacuum pump oil plays the functions of lubrication, sealing and cooling in the vacuum pump. 

Because the mechanical vacuum pump has different models, so the vacuum pump oil must also have suitable viscosity, excellent oil-water separation, good thermal stability and oxidation stability, as low as possible saturated vapor pressure, because the quality of vacuum pump oil indirectly affects the limit pressure, pumping rate, back pressure and oil return rate of vacuum pump equipment. In recent years, with the continuous development of vacuum technology, mechanical vacuum pump develops to high speed, low noise and miniaturization. The linear velocity of the friction pair surface in the pump cavity increases, and the oil temperature rises. Because the mechanical vacuum pump oil tends to be low viscosity, it is required to maintain a low vapor pressure under the working temperature of the pump.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump