What are the types of compressed air coolers principle

Compressed air coolers, also known as air compressor coolers, are mainly divided into air-cooled compressed air coolers and water-cooled compressed air coolers; The main function of a compressed air cooler is to cool, cool and separate the water in the compressed gas from the cylinder.

Taiwan DPC will answer the working principle of air-cooled compressed air cooler.

Air-cooled compressed air coolers are characterized by the use of air as a medium for heat exchange, and the heat is carried away through the air. When the high-temperature compressed air enters the channel in the air cooler core, the heat of the compressed air is quickly transferred to the aluminum alloy core with good thermal conductivity. The air passes through the air tunnel at high speed, forcing the heat away and lowering the temperature of the compressed air.

This is repeated until the system is thermally equilibrated so that the temperature of the compressed air is controlled within the permissible range, and the air-cooled compressed air cooler is placed behind the compressor.

How water-cooled compressed air coolers work.

The high-temperature compressed air discharged from the air compressor enters the aftercooler from the air inlet, flows through the heat exchange tube in the core, and it exchanges heat with the cooling water in the shell, and the temperature is lowered and flows out of the air outlet. In the process of cooling high-temperature compressed air, water vapor and oil vapor are condensed into water droplets and oil droplets, which are discharged from the sewage outlet. The cooling water enters the housing through the inlet pipe, exchanges heat with the compressed air, and then discharges from the outlet.

Thermal expansion and contraction, in turn, vaporization and heat absorption.

Answer]: B, C, D

In air compressors, the commonly used aftercooling finch number fierce devices include Liebisun tube type, heat sink type, casing type, etc.

An air compressor is a device used to compress air into a higher pressure gas. Its principle of operation is based on the moving parts inside the compressor, which usually include pistons, rotors, or screws. The following is a common working principle of air compressors, based on the working principle of piston compressors::

1.Suction phase: When the piston moves downward, a negative pressure area is formed in the cylinder of the compressor. At this time, the air enters the cylinder through the suction valve.

2.Compression phase: When the piston moves upwards, the air inside the cylinder is compressed. The cylinder in the upper part of the piston compresses the air, pushing it towards the outlet.

3.Exhaust stage: When the piston reaches its highest point, the compressed air in the cylinder flows out through the exhaust valve and enters the compressed air system.

This process is repeated over and over again, resulting in continuous gas compression and exhaust. By increasing the speed of the piston and increasing the compression ratio, the air compressor can provide higher pressures. Air compressors are also usually equipped with a cooling system to reduce the heat generated during compression and ensure the proper functioning of the equipment.

The type and working principle of air compressors can vary according to different designs and applications, such as screw type, turbine type, etc. Each type of air compressor has its own range of applications and performance characteristics. <>

The heat medium of the tubular cooler is the tube inlet on the cylinder, and flows in a zigzag way to the tube outlet through each baffle channel. The cooler medium is flowed through two pipes, that is, the cooler medium enters half of the cooler pipe from the water inlet through the water distribution cap, and then flows from the return cover to the other half of the cooler pipe to the other side of the water distribution cover and the outlet pipe. In the process of double pipe flow, the cold medium absorbs the waste heat released by the hot medium and discharges it from the water outlet, so that the working medium can maintain the rated working temperature.

Brief introduction of the functions of the precision filter at all levels: Q level: the first filtration.

In addition to the main pipeline of large grain water 3U P grade: the second filtration, water removal 1U S level: degreasing, it is best to have P-level protection on it, supporting it.

Class C: It is an activated carbon material Grade introduction: Class Q - main line filter It is mostly used after the cooler at the rear of the air compressor or before the refrigeration dryer and other filters to protect the whole system.

It can filter out a large amount of liquid and solid particles above 3 microns, and achieve a minimum residual oil content of only 5ppmw w. P-class - air line filter is mostly installed in front of tools, machinery, motors, cylinders and other equipment, as well as Class A ultra-high efficiency degreasing filter, or after the adsorption dryer to remove water and particles. It can filter out liquid and solid particles as small as 1 micron to achieve the lowest residual oil content only.

Class S-Ultra High Efficiency Degreasing Filters are mostly used upstream of adsorption dryers or downstream of refrigeration dryers to ensure that the air used in the system is completely oil-free. It can filter out liquid and solid particles as small as microns, and achieve the lowest residual oil content, just remember to install a P-class air line filter upstream to protect it.

The working principle of twin-screw air compressor.

The main engine is the core component of the screw machine, and a pair of helical rotors that mesh with each other are arranged in parallel in the main machine, and the rotor with raised teeth outside the pitch circle is usually called the male rotor or male screw; The rotor with concave teeth in the pitch circle 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.

Two rotors that do not touch each other do reverse movement at the same speed in the cylinder, the teeth of the two rotors are inserted into each other's cogging during operation, and the teeth that are inserted into each other's cogging move to the exhaust end with the rotation of the rotor, so that the volume enclosed by the other tooth is gradually reduced, the pressure is gradually increased, the high-speed airflow moves to the moment when the exhaust port is connected with the exhaust port, because there is a higher pressure gas backflow, the pressure in the working volume rises again at this time, and the gas is transported out.

When a cogging is inserted by the other tooth that is meshed with it, two separated spaces are formed, the cogging close to the suction end is the suction volume, the volume of compressed gas is close to the exhaust end, and the volume of compressed gas is close to the exhaust end. With the operation of the compressor, the teeth of the other rotor inserted into the cogging move to the exhaust end, so that the suction volume continues to expand, and the volume of the compressed gas continues to shrink, so as to realize the suction compression process in each cogging, when the gas pressure of the compressed gas in the cogging reaches the required exhaust pressure, the cogging is just communicating with the exhaust orifice, and the exhaust process begins. The suction volume and compression volume divided by the teeth of the opposing rotor into cogging change repeatedly, so that the compressor can continuously suction, compress and discharge.

Under normal circumstances, there are three lines inside the screw air compressor, which are the gas circuit system, the oil circuit system and the circuit system. Installation and precautions of screw air compressor.

1.Classification of air compressors.

The air compressor is the main body in the air source device, it is a device that converts the mechanical energy of the prime mover (usually an electric motor) into gas pressure energy, and it is a pressure generating device for compressed air.

There are many types of air compressors, which can be divided into positive displacement compressors and speed compressors according to their working principles. The working principle of positive displacement compressor is to compress the volume of gas, so that the density of gas molecules in the unit volume increases to increase the pressure of compressed air; The working principle of the speed compressor is to increase the movement speed of the gas molecules, so that the kinetic energy of the gas molecules is converted into the pressure energy of the gas, thereby increasing the pressure of the compressed air.

2.The working principle of a piston air compressor.

In pneumatic transmission, positive displacement piston air compressors are usually used. Here are two typical structures to help understand how an air compressor works. Figure Animation) and Figure Animation) respectively give the working principle diagram of vertical and horizontal air compressors.

The cylinder centerline of a vertical air compressor is perpendicular to the ground, while the cylinder centerline of a horizontal air compressor is parallel to the ground. The rotary motion of the prime mover (electric motor or internal combustion engine) is converted into the reciprocating linear motion of the piston by the crank linkage mechanism. air compressor.

The air intake and exhaust process is similar to the oil suction and oil pressure process of the hydraulic pump, and will not be repeated here.

3.Choice of air compressor.

The choice of air compressor is mainly based on the working pressure and flow rate of the pneumatic system.

The working pressure of the air source should be about 20% higher than the maximum working pressure in the pneumatic system, because the loss along the gas supply pipeline and local losses should be considered. If there are areas in the system where the operating pressure requirements are low, a pressure reducing valve can be used to supply the air. The rated discharge pressure of an air compressor is divided into low pressure (medium pressure ().

High voltage (10 100MPa) and ultra-high pressure (above 100MPa) can be selected according to actual needs.

Electrician knowledge: the working principle of the air compressor, the wiring steps are explained one by one, and the operation is demonstrated.