Maintenance Of Roots Vacuum Pump Unit

Roots Pump-Water ring pump unit is widely used in vacuum distillation, vacuum evaporation, dehydration and crystallization in chemical industry; freeze drying in food industry; vacuum drying in pharmaceutical industry; polyester chips in light textile industry; high altitude simulation test and other vacuum systems.

Roots Vacuum Pump Unit has a very big development prospect in our country, with the development of industry is increasing demand, but such a large workload of use, for the equipment itself, if not timely maintenance and maintenance, for our future use is very unfavorable, for quality will also have a certain harm. Therefore, we must do a good job in the corresponding work. Next we will know the maintenance of it.

Maintenance steps of Roots vacuum pump unit:

1. Roots Vacuum Pump Unit is very hot, this is because we choose the front pump pumping speed is not enough, resulting in excessive compression ratio high inlet pressure, poor cooling, gear box lubricant is too high, rotor and pump shell contact, gear, bearing, oil seal lubrication is not good. The solution is not difficult, as long as we re-select the front pump, adjust, control the inlet pressure, smooth cooling, adjust the amount of oil, repair, to ensure that the amount of oil appropriate, good lubrication;

2. In Roots Vacuum Pump Unit operation instability, excessive noise, low efficiency and so on, these problems are actually related to our own maintenance, the first work instability, because of voltage, improper assembly and other reasons. Too much noise is caused by smooth installation or insufficient lubrication, so try to lubricate the machine.

3. Sometimes the pipeline conductivity of Roots vacuum pump unit is not enough, the pumping speed of the front-stage pump decreases, the relief valve leaks, resulting in insufficient pumping speed and so on. The absolute solution is to increase the pipeline conductivity, repair or replace the front-stage pump, and clean up the relief valve.

The use and maintenance of Roots Vacuum Pump Unit still depends on the actual method. If there are problems in the equipment, we should analyze and judge according to the actual situation. We can’t make a final conclusion. If we pay more attention to the daily life, we will avoid many problems.

Vacuum Pump Ultimate Pressure

The function of the vacuum pump is to extract gas molecules from the vacuum chamber, reduce the pressure of the gas in the vacuum chamber, so as to achieve the required vacuum.

The function of the vacuum pump is to extract gas molecules from the vacuum chamber, reduce the pressure of the gas in the vacuum chamber, so as to achieve the required vacuum. Generally speaking, there is a large range from the atmosphere to the very high vacuum, and so far no vacuum system can cover this range. Therefore, in order to meet the technical specifications of different products, work efficiency and equipment life requirements, different vacuum sections need to choose different vacuum system configuration.

The absolute pressure of vacuum pump means absolute pressure, which is the real vacuum pressure generated by vacuum pump. Absolute vacuum is absolute vacuum pressure. Absolute pressure = local atmospheric pressure + surface pressure (relative pressure), the smaller the absolute pressure is, the closer to vacuum!


Limit vacuum indicates that there is no substance (including molecule, atom, etc.) in this state, which is only a state of existence in theory and is impossible to achieve; it is an important parameter of vacuum pump, is the characteristic value of the pumping capacity of reaction pump, is a value related to vacuum pump, different vacuum pumps can have Different limiting vacuum; it is a concept in theoretical research and an ideal vacuum state refined by excluding the influence of various practical factors. So they are two different descriptions of the vacuum degree of the vacuum pump.

Ultimate pressure of vacuum pump:

The partial pressure is the pressure of the non condensable gas in the gas. The total pressure refers to all gases in the gas.

The pressure of the pressure. In vacuum applications, partial pressure and total pressure have their own application areas. Study on the current vacuum pump

In the nuclear standard, if the total pressure is not specified, the limit pressure index is all partial pressure. 10-3 Torr = 1.33 * 10-1 PA slide valve pump and rotary vane pump can reach; now domestic and foreign rotary vane pump can be 6 * 10-2 Pa Avenue

OIL DIFFUSION PUMP PRICE

The oil diffusion pump should also be applied to electronic industry, chemical industry, atomic energy industry and space simulation test. Oil diffusion pump is used for high vacuum and ultra-high vacuum pumping high vacuum system without serious harm to the working fluid gas, it can not directly exhaust to the atmosphere, the need to equip the front pump.

OIL DIFFUSION PUMP STRUCTURE:

The oil diffusion pump is mainly composed of pump body, diffusion nozzle, steam conduit, oil pan, heater, diffuser, cooling system and jet nozzle.

THE WORKING PRINCIPLE OF OIL DIFFUSION PUMP:

The current stage pump pumps the diffusion pump into the pre-vacuum of about 10 pa, and the working fluid with low saturated vapor pressure at room temperature is heated by a heater. The generated oil vapor moves upward along the steam duct, directed by several stages of nozzles and spews out at high speed, bringing the gas diffused in the oil vapor to the front stage. The oil vapor is ejected into the air from the front stage pump. After the pump wall is cooled, the oil vapor flows back to the bottom of the pump and repeats its work to achieve high vacuum.

What Is The Piston Vacuum Pump

Piston Vacuum Pump is a kind of variable capacity gas transmission pump. It has the advantages of good energy saving effect, high vacuum and large pumping capacity. In addition, compared with rotary pump, the durability of the slide valve pump has more advantages.

What is the piston vacuum pump：

Slide valve pumps have single-stage H-type, two-stage 2H-type slide valve vacuum pumps for the suction of air and other general gases, when the use of gas ballast, can also suck containing a small amount of palm condensable gases (such as water vapor). Additional devices should be used when sucking gases that contain excessive oxygen, are explosive, are corrosive to ferrous metals, and react chemically with vacuum oil.

Application range of piston vacuum pump:

This type of pump can be used alone, also can be used as diffusion pump, oil booster pump, roots pump and other high vacuum pump front pump, relative to rotary vane vacuum pump, H type slide valve pump is more durable, long service life. The pump is widely used in vacuum coating, vacuum heat treatment, vacuum sintering, molecular distillation and aviation simulation test.

Oil Diffusion Pump Operation

Oil diffusion pump is a vacuum pump using low pressure, high speed and directional flow of oil vapor jet. The limit vacuum of this pump is 10-4-10-5 Pa, the working pressure range is 10-1-10-4 Pa, the pumping speed range is several hundred thousand liters/sec (1 liter = 10-3 m 3). Oil diffusion pump is the main equipment to obtain high vacuum. It is widely used in vacuum smelting, vacuum coating, space simulation test and some vacuum systems insensitive to oil pollution.

Operation procedure of oil diffusion pump:

The operation of the oil diffusion pump includes two operations: opening the pump and stopping the pump.

The pump opening sequence of oil diffusion pump:

1. Turn on the cooling water of the diffusion pump, pre-vacuum with the mechanical pump, after the pressure of the diffusion pump is lower than 10-1Pa, turn on the power supply of the diffusion pump to heat the electric furnace and heat the diffusion pump.

2. For small pumps below K-400, the pump can work normally after 45 minutes of heating, and for large pumps between K-500 and K-1200, it needs 45-65 minutes of heating before it can work normally. Therefore, when using the diffusion pump vacuum system, we should pay attention to arranging the start-up time of the diffusion pump.

3. open the diffusion pump population valve, the pump can work normally.

2SK Liquid Ring Vacuum Pump

The 2SK-P1 series two-stage liquid ring vacuum pump-air jet pump unit mainly works under the adiabatic pressure of 10-50mmHg, but its efficiency is low in the high vacuum region. If the Roots water-ring vacuum unit is needed for long-term operation, the best pumping efficiency in the high vacuum region can be obtained.

2SK liquid ring vacuum pump and 2SK-P1 series two-stage liquid ring vacuum pump-atmospheric jet pump unit are used to pump air and other non-corrosive, water-insoluble, non-solid particles in order to obtain a higher vacuum in an airtight container.

2SK liquid ring vacuum pump is widely used in food, textile, chemical, pharmaceutical and metallurgical industries and electronic fields such as vacuum evaporation, vacuum concentration, vacuum moisture regain, vacuum impregnation, vacuum drying and vacuum smelting.

The 2SK series is used for working conditions with suction pressure below – 0.08MPa, and the 2SK – P1 series is used for working conditions with suction pressure below – 0.096MPa.

Features of 2SK liquid ring vacuum pump：

1. Compared with SK series single-stage liquid ring vacuum pump, it has the characteristics of high vacuum and high pumping speed in high vacuum region.

2. Under the same pumping speed, the shaft power is obviously higher than that of 2BV and 2BE series water ring vacuum pumps.

3. because the structure is a double leaf wheel structure, manufacturing and maintenance are more complex and more vulnerable parts.

HOW TO CHOOSE VACUUM PUMP SYSTEM

Vacuum pump unit is composed of pump as the main pump and other types of pump as the front pump in series. Therefore, when choosing vacuum pump unit, we should first combine its application field and application site to select the pump body properties of each part of the vacuum pump unit.

SELECTION OF VACUUM PUMP UNITS:

1. choose the vacuum pump unit correctly. Each pump has a certain range of working pressure, in such a wide range of pressure, pump speed varies with pressure. Therefore, the working point of pump should be selected in this range.

2. Requirements for vacuum equipment for oil pollution. If the equipment strictly requires oil-free, should choose a variety of oil-free pumps, such as: water ring pump, molecular sieve adsorption pump, sputtering ion pump, cryogenic pump. If the requirements are not strict, you can choose an oil pump, coupled with some anti-oil pollution measures, such as cooling trap, baffle, oil trap, etc., can also meet the requirements of clean vacuum.

3. correctly combined vacuum pump unit. Because the vacuum pump has selective pumping, so sometimes choose a pump can not meet the pumping requirements, the need for several pumps combined to complement each other to meet the pumping requirements. Some vacuum pumps can not work under atmospheric pressure, need pre-vacuum; some vacuum pump outlet pressure is lower than atmospheric pressure, need the front pump, so we need to use the pump together.

POINTS FOR ATTENTION IN THE USE OF VACUUM PUMP UNIT:

1. between the distillation system and the vacuum pump unit, the absorption device must be installed.

2. Before distillation, the steam of organic solvent must be thoroughly pumped out of the system.
3. If the pump can be used to pump, then try to pump, such as distillation substances containing volatile substances, can first pump pressure reduction pumping, and then switch to oil pumps.