Who knows which manufacturer s screw compressor is doing better?

Fangxiang compressor is very good, this manufacturer's screw compressor is of good quality and trustworthy.

There is no need to denigrate other companies, only those that suit you are the best, just like when we choose clothes, there are expensive and poor, but expensive and good are not necessarily the most suitable.

Don't buy Japanese air compressors, in addition to patriotism, there is also a high maintenance annoyance.

Atlas Copco: Atlas Copco is a Sweden-based company that specializes in the manufacture of industrial equipment, which includes air compressors and vacuum pumps. The company's screw air compressors are of excellent quality, strong stability and long service life.

Ingersoll Rand: Ingersoll Rand is a global industrial technology company that manufactures air compressors, vacuum pumps, and more. Its screw air compressor adopts Hela's advanced technology and high-quality materials, which has the characteristics of high efficiency and energy saving, low noise, etc., and is deeply loved by users.

Sullair: Sullair is a U.S.-based company that specializes in manufacturing industrial compressors and vacuum pumps. Its screw air compressor adopts advanced control system and intelligent technology, which can achieve efficient and stable air compression and treatment.

Kaeser: Kaser is a German-based company that manufactures industrial compressors and gas processing equipment. Its screw air compressor has the characteristics of high efficiency and energy saving, stability and reliability, and is deeply loved by users.

It should be noted that the brand selection of screw air compressor should be comprehensively considered according to the specific use requirements and actual situation. In addition to the brand, you also need to consider the performance, power, noise and other factors of the screw air compressor to choose the right product for your own use.

The advantages of screw compressors are as follows:

1) High reliability. The screw compressor has few parts and no wearing parts, so it operates reliably, has a long service life, and the overhaul interval can reach 4-80,000 hours.

2) Easy to operate and maintain.

3) Good power balance. It is especially suitable for use as a portable compressor, with small size, light weight and small footprint.

4) Adaptable. The screw compressor has the characteristics of forced gas delivery, the volumetric flow rate is almost not affected by the discharge pressure, and can maintain high efficiency in a wide range, and is suitable for a variety of working fluids without any change in the compressor structure.

5) Multi-phase mixed transport. There is actually a gap between the tooth surfaces of the rotor of the screw compressor, so it can resist liquid impact and can transport liquid-containing gases, dust-containing gases, easy-to-polymerize gases, etc.

The main disadvantages of screw compressors:

1) High cost. Since the rotor tooth surface of the screw compressor is a spatial curved surface, it needs to be machined on the most expensive special equipment with special tools. In addition, there are also high requirements for the machining accuracy of the screw compressor cylinder.

2) It cannot be used in high-pressure occasions. Due to the limitations of rotor stiffness and bearing life, screw compressors can only be used in the medium and low pressure range, and the discharge pressure generally does not exceed 3MPa.

3) It cannot be used for miniature occasions. Screw compressors rely on gap sealing gas, and generally only when the volumetric flow rate is greater than that, the screw compressor has superior performance.

Screw compressors are also known as screw compressors. In the 50s of the 20th century, there was an oil-injected screw compressor applied in the refrigeration device, because of its simple structure, few wearing parts, under the working conditions of large pressure difference or pressure ratio, the exhaust temperature is low, the refrigerant contains a large amount of lubricating oil (often called wet stroke) is not sensitive, has good gas transmission volume regulation, and soon occupies the use range of large-capacity reciprocating compressor, and continues to extend to the medium capacity range, widely used in refrigeration, refrigeration, air conditioning and chemical process and other refrigeration devices. The screw heat pump with it as the main engine has been used for heating and air conditioning since the early 70s of the 20th century, including air heat source type, water heat pump type, heat pump type, ice storage type, etc.

In the industrial sector, screw heat pumps are also used for heat consumption in order to save energy**.

What are the advantages of screw compressors: high reliability, convenient operation and maintenance, good power balance, multi-phase mixed transportation;

Screw compressors are rotary positive displacement compressors (achieved by forced movement of rotating elements);

Usually what we call a screw compressor refers to a twin-screw compressor, in the main engine of the compressor is arranged in parallel with a pair of mutually meshing spiral rotors, usually the rotor with raised teeth outside the pitch circle (from the cross-section), called the male rotor or male screw; The rotor with concave teeth in the pitch circle (seen from the cross-section) is called a female rotor or female screw. Generally, the male rotor is used as an active rotor, and the male rotor drives the negative rotor to rotate. Ball bearings on the rotor position the rotor axially and withstand the axial forces in the compressor.

Tapered roller thrust bearings at both ends of the rotor position the rotor radially and subjected to the radial and axial forces in the compressor. Orifice of a certain shape and size are set up at both ends of the compressor host, and a suction port is called for suction; The other one for exhaust is called the exhaust port.

Composition of screw air compressor:

An oil-injected screw air compressor unit is mainly composed of two parts: the main engine includes the main engine of the screw air compressor and the main motor, and the auxiliary equipment includes the intake and exhaust system, the oil injection and oil-gas separation system, the cooling system, the control system and the electrical system.

In the intake and exhaust system, the free air enters the suction port of the air compressor after being filtered out of dust and impurities through the intake filter, and is mixed with the lubricating oil injected during the compression process. The compressed oil-gas mixture is discharged into the oil-gas separation barrel.

The primary and secondary oil and gas are separated, and then sent into the use system through the minimum pressure valve, rear cooler and gas-water separator.

In the oil injection and oil-oil separation system, when the air compressor is running normally, the lubricating oil in the oil-air separation barrel depends on the exhaust pressure of the air compressor and the pressure difference at the fuel injection port to maintain the flow in the circuit. Under the action of this pressure difference, the lubricating oil enters the oil cooler through the temperature control valve, and then removes the impurities and particles through the oil filter, and most of the lubricating oil is injected into the compression cavity of the air compressor to play the role of lubrication, sealing, cooling and noise reduction; The rest of the lubricating oil is injected into the bearing chamber and the gearbox, respectively. The part of the oil injected into the compression chamber is discharged into the oil and gas separation barrel along with the compressed air, and the vast majority of the lubricating oil is separated after centrifugal separation, and a small amount of lubricating oil is separated by the filter element for secondary separation, and the lubricating oil that is separated by the second time is returned to the low-pressure end such as the suction port of the air compressor through the return pipe.

Huitong Electromechanical].

It is a machine that uses a screw to compress air.

The cylinder of a screw compressor is equipped with a pair of intermeshing spiral yin and yang rotors, both of which have several concave teeth that rotate in opposite directions. The gap between the rotors and between the casing and the rotor is only 5 10 wires, and the main rotor (also known as the male rotor or convex rotor) is driven by the engine or electric motor (mostly driven by the electric motor), and the other rotor (also known as the cathode rotor or concave rotor) is driven by the main rotor through the oil film formed by the oil injection formation, or by the synchronous gears of the main rotor end and the concave rotor end.

The grooves of the spiral rotor are filled with gas as they pass through the suction port. When the rotor rotates, the rotor groove is closed by the casing wall to form a compression chamber, and when the rotor groove is closed, the lubricating oil is sprayed into the compression chamber to play the role of sealing cooling and lubrication. When the rotor rotates to compress the lubricant + gas (referred to as the oil-air mixture), the volume of the compression chamber decreases, and the oil-gas mixture is compressed to the exhaust port.

As the compression chamber passes through the exhaust port, the air-gas mixture is discharged from the compressor to complete a suction-compression-exhaust process.

Screw compressors, also known as screw compressors, include screw air compressors and screw process compressors (vinyl chloride compressors, etc.), and the screw machine is a volumetric twin-screw fuel injection compressor, which is generally a box-type skid structure. Zhiyun Refrigeration is happy to answer for you.

Low noise, high efficiency, low energy consumption.

1.The cost is high, because the rotor tooth surface of the screw machine is a space curved surface, it is necessary to use special tools to process on the most expensive special imitation sail equipment, and the processing accuracy of the screw machine cylinder is also higher than that of the hail.

2.It can not be used in ultra-high pressure occasions, due to the limitations of the rotor and bearing life, the screw machine is only suitable for low, medium and high pressure ranges, and the exhaust pressure is generally not more than 10MPa, and the ultra-high pressure is dominated by the reciprocating machine.

The screw compressor has simple structure, few wearing parts, can work under the working condition of large pressure difference or pressure ratio, has low exhaust temperature, is insensitive to a large amount of lubricating oil in the refrigerant, and has good air transmission adjustment characteristics.

The first screw compressor used in refrigeration units was the open type, and later developed into semi-hermetic and fully hermetic types.

Compared with reciprocating compressors, the advantages of screw compressors are:

1. The movement of the compressed gas of the screw rotor is a rotary motion, and the rotor speed can be improved, so when the gas transmission volume is the same, the screw compressor appears to be small, occupies a small area, is light in weight, has no reciprocating inertia force in the movement, and does not have high requirements for the ground foundation.

2. The structure of the machine is simple, the number of parts is only one-tenth of that of the reciprocating compressor, there are few wearing parts, there is no suction and exhaust valve, no expansion process, the single-stage pressure ratio is large, and it is not sensitive to liquid shock.

3. It can adapt to a wide range of working conditions, especially for heat pump units, and its volumetric efficiency is not as obvious as that of reciprocating compressors.

4. The gas transmission volume can be adjusted steplessly, and in the range of more than 50%, the power decreases proportionally to the gas transmission volume.

Open-type screw compressors have the disadvantages of high noise, easy leakage of refrigerant, and complex oil circuit. Therefore, in addition to the use of ammonia working fluid or electricity can not be used, small and medium-sized screw machines are developing towards closed type.