Roots vacuum pump unit, is the roots vacuum pump an oil circulation pump

Roots vacuum pump (abbreviation: roots pump) refers to a kind of variable capacity vacuum pump that is equipped with two vane-shaped rotors rotating synchronously in opposite directions, and there is a small gap between the rotors and between the rotor and the inner wall of the pump casing without contacting each other.

The water ring vacuum pump is equipped with an eccentric rotor with fixed blades, which throws water (liquid) to the stator wall, and the water (liquid) forms a liquid ring concentric with the stator, and the liquid ring and the rotor blades together form a rotating variable volume vacuum pump.

Roots vacuum pumps have been tested for long-term operation in petroleum, chemical, plastic, pesticide, steam turbine rotor dynamic balancing, aerospace space simulation and other devices, so they should be vigorously promoted and applied in China. At the same time, it is also widely used in petroleum, chemical, metallurgy, textile and other industries. The vacuum pump accessories are vacuum pump silencers for vacuum pump noise control.

Water ring vacuum pumps are mainly used in coal mines (gas pumping), chemical, pharmaceutical, mining, papermaking, food, beer, building materials, plastics, metallurgy, electrical appliances and other industries.

The characteristics of roots vacuum pump are: fast start, less power consumption, low operation and maintenance costs, large pumping speed, high efficiency, insensitive to a small amount of water vapor and dust contained in the pumped gas, and a large pumping rate in the pressure range of 100 1 Pa, which can quickly eliminate the gas released suddenly. This pressure range is exactly between the oil-sealed mechanical vacuum pump and the diffusion pump.

For this reason, it is often connected in series between a diffusion pump and an oil-sealed mechanical vacuum pump to increase the pumping capacity in the intermediate pressure range. At this time, it is also called a mechanical booster pump.

The advantages of the water ring vacuum pump are simple structure, low manufacturing accuracy requirements, easy processing, compact structure, high speed of the pump, generally can be directly connected with the motor, no need for deceleration device. Therefore, with small structural size, large exhaust volume can be obtained, the floor area is also small, the suction is uniform, the work is stable and reliable, the operation is simple, and the maintenance is convenient, but the disadvantage is that the efficiency is low, generally about 30%, and the better one can reach 50%, and the vacuum degree is low.

Knowledge of Roots Vacuum Pump Unit Ventilation:

1. The air forms a convection blow from the air inlet to the roots vacuum pump unit, in this process, the doors and windows near the unit are kept closed, and the forced air flows into the workshop by the door and window compensation on the side of the air inlet, and the air flows into the workshop from the air inlet in an orderly manner, flows through the workshop, and is discharged from the workshop.

2. Thorough and efficient air exchange, the air exchange rate can be as high as 99%, through specific engineering design, according to the need to design the air exchange speed and wind speed, any high heat, harmful gases, dust and smoke can be quickly discharged out of the workshop, any poor ventilation problems can be completely solved at one time, and can be reached within a few seconds from the opening station.

3. The roots vacuum pump unit discharges air to the outside to reduce the indoor air pressure, the indoor air becomes thinner, the characteristics of the water ring vacuum pump form a negative pressure area, and the air flows into the room due to the air pressure difference compensation, in the practical application of the industrial plant, it is concentrated on one side of the plant, and the air inlet is on the other side of the plant.

Good Kaiderotz vacuum pump unit does a good ventilation process, which can reduce the loss caused by resistance and improve efficiency.

Summary. Vacuum pump refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to pump air from the pumped container to obtain vacuum. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in an enclosed space.

According to the working principle of vacuum pumps, vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transfer pumps. It is widely used in metallurgy, chemical industry, food, electronic coating and other industries.

Dear, hello, glad for your question, for you to retrieve the roots vacuum pump is an oil circulation pump<> vacuum pump refers to the use of mechanical, physical, chemical or physicochemical methods to pump the container to obtain vacuum device or equipment. In layman's terms, a vacuum pump is a device that uses various methods to improve, generate and maintain vacuum in an enclosed space. According to the working principle of vacuum pumps, vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transfer pumps.

It is widely used in metallurgy, chemical industry, food, electronic coating and other industries.

In a wide range of pressure, it has a very stable large pumping speed, which can quickly discharge the gas released suddenly, making up for the shortcomings of the oil-sealed mechanical stuffy hall pump and diffusion pump, and has a good performance in mechanical pressurization.

There is no gas compression in the pump chamber, and there are gaps between the moving parts, which is insensitive to dust and water vapor in the extraction gas, so condensable vapors can be extracted.

The design is advanced, the structure is reasonable, there is a gap between the rotor and the pump, no contact with each other, no lubrication, directly reduces the friction to a minimum, can use a lower power or a larger pumping speed, has a very significant energy-saving effect.

The moving parts in the pump chamber do not need to be lubricated with oil, which can avoid the contamination of the vacuum system by steam, and is conducive to or without oil vacuum.

There is no need to install the inlet valve and the exhaust valve, the structure is very simple, the noise is relatively low, the moving parts in the pump chamber do not touch each other, it is not easy to be damaged, and the maintenance of the pump is very low.

The rotor has good geometric symmetry, the work is very stable, and the method of increasing the speed can be used to increase the speed or the pumping speed can be used to achieve a compact structure, small volume and light weight.

The start-up is very fast, and the ants can reach the limit vacuum in a short time.

1) There is a large pumping speed in the pressure range that is wider than the potato;

2) Reputation and fast movement, able to work immediately;

3) Insensitive to dust and water vapor contained in the pumped gas;

4) The rotor does not need to be lubricated, and there is no oil in the pump chamber;

5) The vibration is small, the rotor dynamic balance condition is good, and there is no exhaust valve;

6) Small driving power and small mechanical friction loss;

7) Compact structure and small footprint;

8) Low operation and maintenance costs.

The characteristic advantages of roots vacuum pump are fast start-up and high efficiency; The rotor does not need to be lubricated, and there is no oil in the pump chamber; The vibration is small, and the rotor dynamic balance conditions are good; The driving power is small, and the mechanical friction loss is small; Compact structure and small footprint; Low operation and maintenance costs.

Roots vacuum pump has the following characteristics:

Large pumping velocity over a wide range of pressures;

Fast start-up, less power consumption, low operation and maintenance costs;

Insensitive to dust and water vapor contained in the pumped gas;

The rotor does not have to be lubricated, and there is no oil in the pump chamber, but it is difficult to process and inspect the surface of the rotor;

Low vibration, smooth operation, no exhaust valve;

Roche vacuum pump, it is relatively simple in structure, well, more stable, and then what about the pressure? It can be recirculated and pressurized, well, is a particularly good water pump.

The advantages of this vacuum pump are obvious, it has better water absorption, and it is of high quality.

Cost-effective, the sound is relatively small at work.

The pumping speed is high and the power is small, and the efficiency is improved.

Summary. Since the ordinary roots vacuum pump can only be started at a certain allowable inlet pressure (a certain vacuum degree), a backing pump must be equipped at the outlet of the roots vacuum pump as a pre-pump. If the roots vacuum pump starts too early, it will cause the roots vacuum pump to be overloaded or even damage the motor or damage the roots vacuum pump, so the starting pressure of the roots vacuum pump must be strictly controlled.

For the liquid ring single roots vacuum unit, the backing pump of the main pump is the water ring vacuum pump. The starting sequence of the vacuum pump at all levels is as follows: start the pre-water ring vacuum pump first, and then start the middle roots vacuum pump and the main pump roots vacuum pump step by step when the water ring vacuum pump pumps pump to the starting pressure of the roots vacuum pump.

Pre-stage, because the ordinary roots vacuum pump must be under a certain allowable inlet pressure (a certain vacuum degree) to start, so the outlet of the roots vacuum pump must be equipped with a backing pump as a pre-pumping. If the roots vacuum pump starts too early, it will cause the roots vacuum pump to be overloaded or even damage the motor or damage the roots vacuum pump, so the starting pressure of the roots vacuum pump must be strictly controlled. For the liquid ring single roots vacuum unit, the backing pump of the main pump is the water ring true absolute sensitive collapse pump.

The starting sequence of the hidden vacuum pump at all levels is as follows: start the pre-water ring vacuum pump first, and then start the middle roots vacuum pump and the main pump roots vacuum pump when the water ring vacuum pump pumps pump the system pressure to the parallel circular starting pressure of the roots vacuum pump.

The differences are: different performance characteristics, different application ranges, and different working principles.

1. Different performance characteristics: the characteristics of roots vacuum pump are: fast start, less power consumption, operation and maintenance costs, high pumping speed, high efficiency, and insensitive to a small amount of water vapor and dust contained in the pumped gas; The water ring vacuum pump has a compact structure, the pump speed is high, and it can generally be directly connected with the motor without a deceleration device.

The suction is uniform, the work is stable and reliable, the operation is simple, and the maintenance is convenient.

2. Different application ranges: roots vacuum pumps are widely used in smelting, degassing, rolling in vacuum metallurgy, as well as vacuum distillation, vacuum concentration and vacuum drying in chemical, food and pharmaceutical industries. It is mainly used in coal mining (gas pumping), chemical, pharmaceutical, mining, papermaking, food, beer, building materials, plastics, metallurgy, electrical appliances and other industries.

3. The working principle is different: the roots vacuum pump pump is equipped with two vane-shaped rotors that rotate synchronously in opposite directions, and there is a small gap between the rotors, between the rotors and the inner wall of the pump casing and does not contact each other. The water ring pump relies on the change of the volume of the pump chamber to achieve suction, compression and exhaust, so it belongs to the variable volume vacuum pump.

Roots vacuum pump and water ring vacuum pump are two different types of vacuum pumps, their working principle and structure are different, the main differences are as follows:

1.Working principle: The roots vacuum pump adopts a double rotor structure, which sucks the gas from the air inlet through the rotation of the rotor, and then compresses the gas and discharges it.

The water ring vacuum pump sucks in the brigade gas through the rotation of the water ring, and then discharges the gas through the compression of the water ring.

2.Pumping capacity: The roots vacuum pump has a higher pumping capacity than the water ring vacuum pump, which can achieve a higher vacuum level.

3.Scope of application: Roots vacuum pump is suitable for the extraction of a variety of gases, including dry gas, moisture, steam, etc., with a wide range of applications. Water ring vacuum pumps are suitable for pumping condensate gases such as moisture and steam.

4.Maintenance: Roots vacuum pump has a simple structure and is easy to maintain and maintain, while the water ring vacuum pump needs to replace the water ring and clean the water circuit regularly.

In short, roots vacuum pump and water ring vacuum pump have their own advantages and disadvantages, and the suitable vacuum pump should be selected according to the specific use needs.

Summary. Kiss <>

We are honored to answer that the reason for the positive pressure of the roots vacuum pump is the failure of the inlet valve of the vacuum pump: when the inlet valve is damaged or does not work, it will cause outside air to enter the pump body and increase the pressure. Leaks:

There is a leak in the vacuum pump, which allows the gas to enter the pump body through the leak, which increases the pressure. Gas is swallowed into the turbine: A large amount of gas is swallowed into the turbine due to impurities attached to components such as turbine impellers or rotors, increasing the pressure.

Incorrect operation of the pump: If the pump is operated incorrectly, such as excessive heating, excessive start and stop, etc., it will cause positive pressure. <>

Positive pressure is present in the roots vacuum pump.

Kiss the virtual Huai Wang <>

We are honored to answer that the reason for the positive pressure of the roots vacuum pump is the failure of the inlet valve of the vacuum pump: when the inlet valve is damaged or does not work, it will cause outside air to enter the pump body and increase the pressure. Leaks:

There is a leak in the vacuum pump, which allows the gas to enter the pump body through the leakage, which increases the pressure. Gas is swallowed into the turbine: A large amount of gas is swallowed into the turbine due to impurities attached to components such as turbine impellers or rotors, increasing the pressure.

Incorrect operation of the pump: If the pump is operated incorrectly, such as excessive heating, excessive start and stop, etc., it will cause positive pressure. [Big Red Flower Mingyun] <>

When the roots vacuum pump has a positive pressure problem, the measures taken are: check whether the inlet valve is damaged or not working, and replace or repair it in time. Inspect the pump lift body for leaks and repair or replace damaged parts immediately.

Regularly clean the turbine bridge and rotor to prevent the formation of impurities and prevent gas from being swallowed into the turbine. Operate the roots vacuum pump correctly according to the operation manual, avoid excessive start-stop, heating and other operations, and ensure normal operation. <>