Screw air compressor belongs to what type of equipment

Screw air compressor, is a kind of air compressor, there are two kinds of single and double screw. The invention of the twin screw air compressor is more than ten years later than the single screw air compressor, and the design of the double screw air compressor is more reasonable and advanced.

The twin-screw air compressor overcomes the shortcomings of single-screw air compressor imbalance and bearing vulnerability, and has the advantages of long life, low noise and more energy saving. After the technology matured in the 1980 s, its scope of application was expanding day by day.

It has become an inevitable trend to replace the piston air compressor with high reliability screw air compressor. According to statistics: Japan screw compressor 1976 accounted for only 27%, in 1985 rose to 85%. The western developed countries screw air compressor market share of 80%, and maintain the upward momentum. The screw air compressor has the advantages of simple structure, small size, no wearing parts, reliable work, long life, and simple maintenance.

Single screw air compressor is also called worm air compressor. The meshing pair of single screw air compressor consists of a 6-head screw and 2 11-tooth star wheels. The worm meshes with the two star wheels at the same time, even if the force of the worm is balanced, the displacement is doubled. The volume of the air compressor is small, only 9 cubic meters per minute (9m 3/min). The weight of the worm air compressor is only 1/6 of the piston type.

Advantages

high performance and high efficiency

air compressor equipment-screw air compressor adopts high-capacity compression components, its rotor outer circle speed is low and the best oil injection is achieved, achieving high efficiency and high reliability. Until 2012, the manufacturer's design ensures that the system temperature and compressed air temperature are extremely low. All components are guaranteed to achieve the best cooling effect and maximum service life.

Driving concept

air compressor equipment-Screw air compressors drive the compression assembly at the optimum speed for the application through an efficient transmission system. No maintenance at all during normal operation. It has the advantages of maintenance-free, high reliability and high efficiency.

Low maintenance costs

air compressor equipment-screw air compressor original compressor design saves unnecessary maintenance costs. All components are designed for long life, and the large size of the inlet filter, oil filter and fine separator ensure the best compressed air quality. All oil filters and all types of separator components within the 22kW (30hp) are centrifugal open and close, further reducing maintenance time. "Speed up the repair point" so that the repair work can be completed in a few minutes, downtime and maintenance costs greatly reduced.

Built-in intelligent control

to reduce operating costs, precise operational control is essential. All screw compressors are equipped with an intelligent control system, and the control menu is easy to use.

Structure principle

screw compressor is a working volume for rotary motion of the volumetric gas compression machinery. The compression of gas depends on the change of volume, and the change of volume is achieved by the rotary motion of a pair of rotors of the compressor in the casing.

The basic structure of the screw air compressor: in the body of the compressor, a pair of spiral rotors meshing with each other are arranged in parallel. Usually, the rotor with convex teeth outside the pitch circle is called male rotor or male screw. The rotor with concave teeth in the pitch circle is called the female rotor or the female screw. Generally, the male rotor is connected with the prime mover. The male rotor drives the female rotor to rotate the last pair of bearings on the rotor to achieve axial positioning and bear the compressor. Axial force. The cylindrical roller bearings at both ends of the rotor enable the rotor to achieve radial positioning and withstand the radial forces in the compressor. At both ends of the compressor body, orifices of a certain shape and size are respectively opened. One is for suction, called the intake port; the other is for exhaust, called the exhaust port.

Intake

the air intake process of the detailed analysis of the working process of the screw air compressor: when the rotor rotates, the space of the tooth groove of the male and female rotor is the largest when it is turned to the opening of the air intake end wall. at this time, the space of the tooth groove of the rotor is connected with the air intake. because the gas in the tooth groove is completely discharged during exhaust, the tooth groove is in a vacuum state when it is turned to the air intake, enter the tooth groove of the male and female rotor along the axial direction. When the gas fills the entire tooth groove, the end face of the rotor inlet side turns away from the casing inlet, and the gas in the tooth groove is closed.

Compression

detailed analysis of the working process of screw air compressor compression process: when the yin-yang rotor is inhaling, the tooth tip of the yin-yang rotor will be closed with the casing, and the gas will no longer flow out in the tooth groove. The engagement surface gradually moves toward the exhaust end. The tooth groove space between the meshing surface and the exhaust port is gradually smaller, and the gas in the tooth groove is compressed and the pressure is increased.

Exhaust

exhaust process of detailed analysis of the working process of screw air compressor: when the meshing end surface of the rotor turns to communicate with the exhaust port of the casing, the compressed gas starts to be discharged until the meshing surface of the tooth tip and the tooth groove moves to the exhaust end surface. at this time, the tooth groove space between the meshing surface of the male and female rotor and the exhaust port of the casing is 0, I .e. the exhaust process is completed, at the same time, the length of the tooth groove between the meshing surface of the rotor and the air inlet of the casing reaches the longest, and the air intake process is carried out again.

compression principle

compression principle of screw air compressor

(1) Inspiratory process:

motor drive/internal combustion engine rotor, when the tooth groove space of the main and slave rotors is turned to the opening of the intake end wall, the space is large, and the outside air is filled with it. When the intake side end surface of the rotor turns away from the air inlet of the shell, The air between the tooth grooves is enclosed between the main and slave rotors and the casing to complete the suction process.

(2) Compression process:

at the end of the suction, the closed volume formed by the main and slave rotor tooth peaks and the casing decreases with the change of the rotor angle, and moves in a spiral shape, which is the "compression process".

(3) Compressed gas and fuel injection process:

during the transportation process, the volume continues to decrease, the gas is continuously compressed, the pressure increases, and the temperature rises. At the same time, the lubricating oil that becomes misty due to the air pressure difference is sprayed into the compression cavity to achieve compression and lower temperature sealing and lubrication. effect.

(4) Exhaust process:

when the closed tooth peak of the rotor rotates to meet the exhaust port of the casing, the compressed air begins to be discharged until the coincident surface of the tooth peak and the tooth groove moves to the exhaust end surface. At this time, the tooth groove space is zero, which completes the exhaust process. At the same time, the other pair of tooth grooves of the master-slave rotor has rotated to the intake end, forming the maximum space, and starting the suction process, thus starting a new compression cycle.