What is a Roots Vacuum Pump? 5, What is Roots Vacuum Pump?

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Roots vacuum pump refers to a mechanical vacuum pump with a pair of sole-shaped rotors with synchronous high-speed rotation, this pump can not be pumped alone, and the pre-stage needs to be equipped with oil seals, water rings, etc. Schematic.

Outline drawing of a model.

Its structure and working principle are similar to those of roots blowers, and its suction port is connected to the vacuum vessel or the main pumping pump of the vacuum system when working. The rotor and rotor of this vacuum pump, and between the rotor and the pump casing, are not in contact with each other, and the gap is generally millimeters; No oil lubrication is required. Rotor profiles include arc lines, involute lines, and cycloids.

The volume utilization rate of the involute rotor pump is high, and the machining accuracy is easy to guarantee, so the rotor profile is mostly involute type. The speed of the roots vacuum pump can be as high as 3450 4100 rpm; The pumping rate is 30 10000 litres per second (1 litre = 10-3 m3); Ultimate vacuum: 1 10-3 Pa for single stage and 1 10-3 bar for double stage.

The biggest advantage of roots vacuum pump is that it has a higher pumping rate at lower inlet pressure, but it can not be used alone, there must be a front vacuum pump in series, the pressure in the pumping system is pumped by the front vacuum pump to the roots vacuum pump when the inlet pressure is allowed, the roots vacuum pump can start to work, and in general, the roots vacuum pump is not allowed to work with high differential pressure, otherwise it will be overloaded and overheated and damaged, so the use of roots vacuum pump must be reasonable to choose the front vacuum pump, install the necessary protection equipment.

Generally, the backing vacuum pump can choose an oil-sealed mechanical pump or a liquid ring vacuum pump, especially when pumping out a gas with a large amount of water vapor, it is ideal to use a water ring vacuum pump as a backing pump.

Roots vacuum pump is a kind of vacuum pump, vacuum pump is divided into many kinds, such as liquid ring pump, mechanical pump, roots pump is a kind of mechanical pump, anyway, they are all vacuumed, you can refer to the encyclopedia of roots vacuum pump.

There are two kinds, one is direct vacuuming, and the other is the main pump of other vacuum equipment as a differential pressure pump to improve the vacuum level.

Roots vacuum pump can only be used as a 2-stage pump, must have a front pump used in series, liquid ring pump is common, roots pump working conditions must be used under negative pressure, the roots vacuum unit used in series has a high pumping rate.

The blowing is the roots blower, the suction is the vacuum pump, the machine is the same, but the way of use is different.

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.

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. Hello, roots vacuum pump is an oil circulation pump, 1 roots vacuum pump (abbreviation: roots pump) refers to the pump is equipped with two vane-shaped rotors rotating synchronously in opposite directions, and there is a small gap between the rotors, rotors and the inner wall of the pump casing and does not contact each other.

2.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.

Vacuum pump accessories are used as vacuum pump silencers for noise control of vacuum pumps.

Is a roots vacuum pump an oil circulation pump.

Hello, roots vacuum pump is an oil circulation pump, 1 roots vacuum pump (abbreviation: roots pump) refers to the pump is equipped with two vane-shaped rotors rotating synchronously in opposite directions, and there is a small gap between the rotors, rotors and the inner wall of the pump casing and does not contact each other. 2.

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. Vacuum pump accessories are used as vacuum pump silencers for noise control of vacuum pumps.

How to add? Is it here?

If it is a foreign roots pump, it is best to refuel according to the requirements of the pump factory, for example, Leybold roots pump, generally add N62 high vacuum pump oil. Generally, the domestic roots pump can use mechanical pump oil, and its function is lubrication, just add No. 100 vacuum pump oil.

Should be. Dear this, we are not professional can only help you solve some simple problems, if it is really a factory, it is better to consult a professional.

There is no need to be relatively closed, the roots pump is an intermediate compression pump, and it cannot be used separately from other vacuum pumps. The water ring vacuum pump is a backing pump, which is used directly into the atmosphere. The two can already be compared without conflict, and can be used in tandem.

Therefore, the two of them are partners and Duan Ling is not opposite. There's no better way to say that. What I am describing here is a general roots vacuum pump, excluding multi-stage roots and air-cooled roots.

A multistage roots vacuum pump is a commonly used mechanical pump that consists of two or more roots impellers engaged to each other to achieve high pumping speeds and low ultimate pressures. Its main advantages are as follows:1

High-efficiency pumping: The multi-stage roots vacuum pump continuously increases the number of impellers in the operation, so as to improve the gas emission and pumping efficiency per unit time. 2.

Wide applicability: Multistage roots vacuum pumps can handle most gases, including common noble gases, vapors and dust, etc., and are widely used in high vacuum and ultra-high vacuum technology, semiconductors, electronics, aerospace and chemistry. 3.

Simple maintenance: The multistage roots vacuum pump has a simple structure, no wearing parts, and has a long service life, and is relatively easy to maintain. 5.

Stable operation: The multi-stage roots vacuum pump is equipped with advanced control system and automatic monitoring function, which can achieve long-term stable work and ensure low noise and low vibration during operation. To sum up, multistage roots vacuum pumps have the advantages of high efficiency pumping, wide application, fast pumping speed, simple maintenance, stable operation, etc., and have been widely used in industrial production and scientific research.