Find the animation of the working principle of the screw compressor

Compressor 3D Animation - Twin Screw Compressor 3D Animation - Air Compressor 3D Animation - Compressor Operation Principle 3D Animation - Product Demonstration 3D Animation.

The principle of screw compressor is introduced, the cylinder of the screw compressor is equipped with a pair of spiral yin and yang rotors that mesh with each other, and both rotors have several concave teeth, and the two 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. So there is no metal contact in the drive (theoretically).

The length and diameter of the rotor determine the compressor discharge volume (flow) and discharge pressure, the longer the rotor, the higher the pressure; The larger the rotor diameter, the greater the flow rate. 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 seal it. 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.

Each rotor of the screw machine is supported by anti-friction bearings, which are held in place by an end cover close to the end of the shaft. The inlet end is supported by a roller bearing, and the exhaust end is supported by a counterparting cone roller, usually the bearing at the exhaust end to position the rotor, that is, the thrust bearing, resists axial thrust, bears radial loads, and provides the necessary minimum clearance for axial operation.

The duty cycle can be divided into three processes: suction, compression and exhaust. As the rotor rotates, each pair of teeth meshing with each other completes the same work cycle one after the other.

1. Inhalation process.

When the rotor rotates, the cogging volume gradually expands with the rotation of the rotor, and is connected to the suction inlet, and the gas from the evaporation system enters the cogging volume through the orifice for gas inhalation. After the rotor is rotated to a certain angle, the interdental volume is disconnected from the suction orifice beyond the suction orifice, and the suction process ends.

2. Compression process.

When the rotor continues to rotate, the gas in the cogging enclosed by the body, suction end seat and exhaust end seat is pressed to the exhaust end due to the mutual meshing of the yin and yang rotors and the mutual filling of the teeth, and the pressure gradually increases for the compression process.

3. Exhaust process.

When the rotor is rotated to make the cogging space communicate with the exhaust orifice on the exhaust end seat, the gas is pressed out and discharged from the exhaust flange to complete the exhaust process. Due to the above three processes in the working cycle of each cogging space, when the compressor is running at high speed, several pairs of cogging work volume repeat the suction, compression and exhaust cycles, so that the gas delivery of the compressor is continuous and stable.

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.

The screw compressor was invented in 1934 by Lysholm, a professor at the Royal Swedish Institute of Technology. Due to the limitations of design and manufacturing level, the development of screw compressors was relatively slow before the sixties; In the early sixties, the oil injection technology was introduced into the screw compressor, which reduced the requirements for the machining accuracy of the screw rotor profile, and at the same time had a favorable impact on the noise, structure, and speed of the unit. At present, the oil-injected screw compressor has become the main model in the aerodynamic, refrigeration and air-conditioning industry, and the screw compressor has occupied a leading position in the market in the air power device with medium volume flow rate and refrigeration device with medium refrigeration capacity.

TOKA extra-high brand air compressor].

1. Inhalation process.

The screw type intake side suction port must be designed so that the compression chamber can fully inhale, and the screw air compressor does not have an air intake and exhaust valve group, the air intake only depends on the opening and closing of a regulating valve, when the rotor rotates, the groove space of the main and auxiliary rotor is the largest when it is turned to the opening of the inlet end wall, the groove space of the rotor is communicated with the free air of the air intake, because the air of the groove is fully discharged when exhausting, and at the end of exhaust, the groove is in a vacuum state, and when it is turned to the air intake, the outside air is inhaled, which flows axially into the groove of the main and auxiliary rotors. Screw air compressor maintenance reminds that when the air fills the entire groove, the end face of the inlet side of the rotor is turned away from the air inlet of the casing, and the air between the grooves is sealed.

2. Closure and conveying process:

At the end of the suction of the main and auxiliary rotors, the tooth peaks of the main and auxiliary rotors are closed with the casing, and the air is closed in the groove and no longer flows out, that is, [sealing process]. The two rotors continue to rotate, and their tooth peaks and grooves coincide at the suction end, and the anastomosis surface gradually moves towards the exhaust end. Screw air compressor maintenance process three.

3. Compression and fuel injection process

During the conveying process, the meshing surface gradually moves to the exhaust end, that is, the groove between the meshing surface and the exhaust port gradually decreases, and the gas in the groove is gradually compressed, and the pressure increases, which is the [compression process]. At the same time of compression, the lubricating oil is also sprayed into the compression chamber and mixed with the room air due to the effect of pressure difference.

4. Exhaust process:

When the meshing end face of the rotor is transferred to communicate with the exhaust gas of the casing during the maintenance of the screw air compressor, (the pressure of the compressed gas is the highest at this time) the compressed gas begins to be discharged, until the meshing surface of the tooth peak and the tooth groove moves to the exhaust end face, at this time, the groove space between the meshing surface of the two rotors and the exhaust port of the casing is zero, that is, it is completed (exhaust process), and at the same time, the length of the groove between the rotor meshing surface and the air inlet of the casing reaches the longest, and the suction process is carried out again.

Screw compressors, also known as screw compressors, are divided into single-screw compressors and twin-screw compressors. The single-screw compressor was developed in the 70s by the French Sinn, because of its more reasonable structure, quickly applied to the field of national defense, and was protected by the development country, and the technology has been relatively independent. The twin-screw compressor was first proposed by the Germans in 1878, and it was not until 1934 that the Royal Institute of Technology in Sweden laid the screw compressor SRM technology and began to be applied in industry, achieving rapid development.

The semi-hermetic oil-injected screw compressor used in SLEA is a positive displacement compressor consisting of three parts: motor, rotor and primary oil separator. The semi-hermetic motor has a speed of 3000 rpm and is cooled by suction air.

The cooling capacity of a single head is 209 709 kW and the cooling capacity of two heads is 791 1419 kW. The two compressors of a two-head unit can be the same or different. The compressor has only three moving parts:

Male and female rotors and a spool valve. The male rotor is directly driven by the motor and drives the female rotor, each with its own bearing.

The twin-screw host introduced the working process: the inter-tooth primitive volume (that is, the working volume formed by each pair of teeth) gradually expands with the rotation of the rotor, and communicates with the air intake orifice in the lower left of the machine, and the gas enters the primitive volume through the orifice, and the air intake process begins; After the rotor rotates to a certain angle, the volume of the intertooth primitives exceeds the position of the air inlet orifice, and it is disconnected from the air inlet orifice, and the air intake process ends; After the rotor is turned to a certain angle, the volume of the primitives between the two isolated teeth intrudes into the concave teeth of the cathode screw due to the convex teeth of the male screw, and the volume of the primitives begins to shrink at the same time, so as to realize the compression process of gas. Until the moment when a pair of primitive volumes are connected to the exhaust orifice; After the primitive volume and the exhaust orifice are connected, the exhaust process begins, and the exhaust process continues until the two teeth are completely engaged, that is, the volume of the two primitives is equal to zero due to the complete meshing of the two rotors.

Operation 1: Before the start of the operation.

1. Check to confirm whether the valves in each part are in the correct position.

2 Check that all guards and safety accessories are in good condition.

3. Check whether the lubricating oil surface meets the standard.

II. Steps.

1 First press the "on" button of the air dryer and let the air dryer run for more than 5 minutes. Observe whether the dryer is running normally and smoothly.

2 Press the air compressor "start" button (or "*" key).

3 Slowly open the exhaust valve until fully open.

3. Shutdown.

1 Press the air compressor "Stop" button (or "O" key).

2 Press the "OFF" button of the air dryer.

3 Close the exhaust valve.

4. Safety and precautions.

1 When the ambient temperature is close to 30 degrees Celsius, the exhaust fan should be turned on to reduce the indoor temperature.

2 When the ambient temperature exceeds 30 degrees Celsius, the induced draft fan should be turned on to reduce the indoor temperature.

3 When the indoor noise is greater than 90db (a), protective earmuffs should be worn.