Today, I will explain the performance and knowledge points of screw air compressor

Screw air compressor is pre configured screw air compressor, which only needs a single power connection and compressed air connection, and has a built-in cooling system, which greatly simplifies the operation of the device. The screw type air compressor consistently provides high-quality compressed air for all walks of life with its advantages of high function, high effect, no protection and high reliability. The screw type air compressor is pre packaged, which only needs a single power connection and compressed air connection, and has a built-in cooling system, which greatly simplifies the operation of the device.

The screw tightening components in the screw type air tightening machine are manufactured internally by a relatively new type of CNC grinder, and online laser skills are used to ensure accurate manufacturing tolerances. Its reliability and function can ensure that the operating cost of the compactor is always ultra-low in the service period. Adjustment compactor, integrated compactor and desiccant series are all new products in L / LS series compactor.

The screw type air compressor provides high-quality compressed air for all walks of life with its advantages of high efficiency, high power, no protection and high reliability.

Introduction to strengths

High function, high power, unattended

Air compressor equipment - screw type air compressor selects high-capacity tightening components, its rotor outer circle speed is low, and it achieves better oil injection, which completes reliability. Ultra new planning ensures that the system temperature and compressed air temperature are ultra-low. Ensure that all components reach a better cooling effect and an extra high service life.

1. Screw air compressor has the advantages of high stability, high power, small vibration and low noise.

2. The cooperation between the male and female rotors and the rotor and the casing is set, so that there is less backflow and leakage of gas, and there is no spare void volume together, so the power is high.

3. The injected smooth oil has the functions of sealing, cooling, noise reduction and smoothing

4. Compared with piston machine, it has fewer wearing parts and lower failure rate.

5. The screw tightening operation curve is smooth, with small vibration and low noise compared with the piston machine.

6. Cooling methods are generally divided into water cooling and air cooling.

7. Heat dissipation system: the plate fin structure and high-quality data are selected to ensure that the cooler has high pressure resistance, high heat dissipation power and good corrosion resistance.

8. Air filter: heavy-duty, multi-stage air inlet filter, dust removal accuracy of 1um (98% filtered), large working surface, long relative service life.

9. Oil / gas separator: the new generation separator uses brand-new filter data, with higher power and air oil content less than 2ppm.

10. Intelligent controller: all the operation and relevant data of the air compressor are displayed on the control panel, which can be controlled between your fingers easily, conveniently and accurately.

Air compressor equipment - screw air compactor common compactor planning saves unnecessary protection costs. Long life planning is adopted for all parts, and large-sized inlet filter, oil filter and fine separator ensure better compressed air quality. All oil filters and separators of various types within 22KW (30HP) are of centrifugal type, which further reduces the repair time. "Suda repair point" enables repair operations to be completed in a few minutes, reducing downtime and repair costs.

Built in intelligent control

In order to reduce the operating cost, fine operation and control are indispensable.

Principle introduction

Contraction principle (1) suction process: the motor drives the rotor. When the tooth groove space of the main and slave rotors is turned to the opening of the air inlet end wall, the space is large and the outside air fills it. When the end face of the rotor on the air inlet side 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) Tightening process: at the end of inhalation, the closed volume formed by the tooth peak of the main and secondary rotors and the casing is reduced with the change of the rotor viewpoint and moves in a spiral shape, which is the "tightening process".

(3) Tightening gas and injection process: during the delivery process, the volume is continuously reduced, the gas is continuously tightened, the pressure is improved, and the temperature is increased. Together, the mist like smoothness due to the pressure difference is injected into the tightening chamber, and then the function of tightening, lowering the temperature sealing and smoothing is achieved.

(4) Exhaust process: when the closed tooth peak of the rotor rotates to meet the exhaust port of the casing, the compressed air starts to be discharged until the matching surface between the tooth peak and the tooth groove moves to the exhaust end face, and at this time, the space of the tooth groove is zero, that is, the exhaust process is completed. Together with this, the other pair of tooth grooves of the master and slave rotors have rotated to the intake end, forming a super large space and starting the intake process, thus starting a new tightening cycle.

The volume of air discharged by the air compressor per unit time and converted into the air volume in the suction state.

Factors affecting the actual exhaust volume of screw air compressor

1. Equipment speed:

The exhaust volume of screw air compressor is directly proportional to the rotation speed, which often changes with the voltage and frequency of the power grid. When the voltage drops or the frequency drops, the rotation speed will drop, reducing the exhaust volume of the screw air compressor.

2. Inhalation status:

Screw air compressor is a volume type compactor, and the suction volume remains unchanged. When the suction temperature increases, or the suction pressure decreases due to the excessive resistance of the suction pipeline, the density of the gas decreases, and the exhaust volume of the screw air compressor will be reduced accordingly;

3. Gas leakage:

There is no contact between the rotors and between the rotor and the housing during operation, and there is a certain gap, so gas leakage will occur. When the gas with increased pressure leaks through the gap to the suction pipe and the meshing groove, the exhaust volume will be reduced. In order to reduce leakage, sealing teeth are provided on the tooth top of the driven rotor, sealing grooves are provided on the tooth root of the driving rotor, and ring or strip-shaped sealing teeth are also processed on the end face. If these sealing lines are worn, the leakage will be increased, so these factors should be taken into account in the ordinary protection;

4. Cooling effect:

During the contraction process, the temperature of the gas will rise, and the temperature of the rotor and the casing will rise accordingly. Therefore, during the suction process, the gas will be heated by the rotor and the casing and expand, so the suction volume will be reduced accordingly. Some rotors of screw type air compressor are cooled by oil and the casing is cooled by water. One of the purposes is to reduce its temperature. When the cooling effect is not good, the temperature will rise, and the exhaust volume of the screw air compressor will be reduced.

Application protection

Safety precautions

1. Qualified personnel are required to operate, repair and maintain the compressor.

2. The tightening machine cannot be reversed. After the initial start or maintenance of the electronic control system, before starting the tightening machine, first confirm whether the rotation direction of the motor is the same as the regular rotation.

3. When disassembling high-temperature components, wait until the temperature is cooled to the ambient temperature.

4. Introduce the use of special oil for screw tightening machine. Smooth oils of different trademarks shall not be mixed.

5. Do not make any changes or add any devices that affect the safety and reliability of the tightening machine without the permission of the manufacturer.

6. The original spare parts of the tightening machine are specially planned and made. The use of authentic spare parts is recommended to ensure the reliability and safety of the tightening machine operation.

7. It is not allowed to block the air inlet of the compactor during operation.

8. Unless it is indicated that it can be used for breathing, it is not allowed to use compressed air for breathing.

9. The tightening machine cannot be operated under the condition of exceeding the regular pressure and temperature.

10. Once abnormal operation of the tightening machine is found, the tightening machine shall be stopped immediately and the abnormality shall be eliminated in time.

11. Use the right things to maintain and repair the compactor.

12. After repair and before startup, confirm that all safety devices have been reinstalled and everything has been removed from the compactor.

Protection and maintenance

1. Check the oil level, exhaust temperature and exhaust pressure every day to see if there is abnormal sound;

2. Turn over the drain valve of the separator to drain the condensed water before starting the machine every week, check whether there is leakage everywhere, check the safety valve, and check the wear condition of the belt (visual inspection);

3. Regularly check the air inlet control valve, the extra small pressure valve, the electric control box terminal, the safety valve and the cooling fan;

4. Regularly clean and clean the cooler and test the reliability of the safety valve;

5. Regularly replace the engine oil filter core, oil separator filter element, intake filter element and smooth oil.

Common troubleshooting

1. The machine does not start: check the main switch and power cord, and check the motor;

2. The machine does not load after startup: adjust the setting value of the pressure switch or replace the pressure switch, check or replace the solenoid valve;

3. The tightening machine does not unload and the safety valve discharges: adjust the setting value of the pressure switch or replace the pressure switch, check or replace the solenoid valve;

4. Excessive oil consumption: use oil according to the recommendation, lower the oil level to the normal position, remove the oil return pipeline for cleaning, and replace the filter element of the oil-gas separator;

5. The exhaust pressure is lower than the regular value: reduce the gas consumption or add a compressor, check the leakage of the system, clean or replace the air inlet filter core, replace the oil-gas separator filter element, check or replace the solenoid valve, overhaul the air inlet control valve, replace the belt, and adjust the setting value of the pressure switch;

6. High temperature protection shutdown of the tightening machine: improve the environmental ventilation conditions, clean or clean the cooler, add oil to the regular position, and replace the oil filter;

7. During unloading operation of the tightening machine, the exhaust pressure still rises slowly, and the safety valve discharges: check or replace the solenoid valve, overhaul the air inlet control valve, and overhaul the unloading pipeline;

8. Relief of safety valve: overhaul or replace safety valve, overhaul extra small pressure valve, replace filter element of oil-gas separator, overhaul or replace pressure switch, and check intake control valve or solenoid valve.

Maintenance of air inlet filter element

The air filter is a component that filters dust and dirt from the air, and the filtered clean air enters the screw rotor tightening chamber for tightening. Because the internal clearance of the screw machine only allows particles within 15u to be filtered out. If the air filter element is blocked and damaged, many particles larger than 15u will enter the screw machine for circulation, which will not only greatly shorten the service life of the oil filter element and the oil fine separation core, but also lead to many particles directly entering the bearing cavity, accelerate the wear of the bearing, make the rotor gap larger, shrink the power, and even make the rotor dry and bite.

Replacement of oil filter

After 500 hours of operation on the first day of the new machine, the oil core should be replaced, and the oil filter element should be removed by reverse rotation with a special wrench. Screw oil should be added before installing the new filter element. Screw the seal of the filter element back to the oil filter base with both hands and tighten it firmly. It is recommended to replace the new filter element every 1500-2000 hours. When changing the engine oil, replace the oil filter element together. The replacement cycle should be shortened when using in a bad environment. It is forbidden to use the engine oil filter element beyond the time limit, otherwise, because the filter element is blocked seriously, the pressure difference exceeds the bearing boundary of the bypass valve, and the bypass valve opens actively, many dirt and particles will directly enter the screw engine with the engine oil, resulting in serious consequences. The replacement of diesel engine oil filter element and diesel filter element of diesel screw engine shall comply with the maintenance requirements of diesel engine, and the replacement method is similar to that of screw oil core.

Protection and replacement of oil and gas separator

The oil-gas separator is a component that separates the screw smooth oil from the compressed air. Under normal operation, the service life of the oil-gas separator is about 3000 hours, but the quality of smooth oil and the filtering accuracy of air have a great impact on its service life. It can be seen that the maintenance and replacement cycle of the air filter element can be shortened and the installation of the front air filter can be considered under the harsh operating environment. The oil-gas separator shall be replaced when it expires or when the front and rear pressure difference exceeds 0.12mpa. Otherwise, the motor will be overloaded, the oil and gas separator will be damaged and the oil will escape. Replacement method: remove all control pipe joints of the device on the oil and gas barrel cover. Take out the oil return pipe extending into the oil and gas barrel from the cover of the oil and gas barrel, and remove the fastening bolts of the upper cover of the oil and gas barrel. Remove the upper cover of the oil and gas barrel and take out the oil. Remove the asbestos pad and dirt stuck on the upper cover plate. Install a new oil and gas separator, and pay attention to the nailing and binding of the upper and lower asbestos pads. The asbestos pads must be placed in order when they are pressed, otherwise they will cause cushion flushing. Install the upper cover plate, oil return pipe and control pipes as they are to check for leakage.

Maintenance and replacement

The quality of screw oil has a decisive impact on the function of the oil injection screw machine. Good oil products have good antioxidant stability, quick separation, good bubble clearing, high viscosity and good anti-corrosion function. Therefore, users use pure special screw oil. The first oil replacement shall be carried out after the running in period of the new machine is 500 hours, and the new oil shall be replaced every 2000 hours in the future. Replace the oil filter when changing the oil. It can be used in places with harsh environment to shorten the replacement cycle. Alternative: start the air compressor and run it for 5 minutes, so that the oil temperature rises above 50 ℃ and the viscosity of the oil decreases. Stop the operation. When there is 0.1MPa pressure in the oil and gas barrel, turn over the oil drain valve at the bottom of the oil and gas barrel and connect the oil storage tank. The oil drain valve should be opened slowly to avoid splashing of smooth oil with pressure and temperature and hurting people and dirt. Close the oil drain valve after the smooth oil becomes drops. Unscrew the oil filter element, drain the smooth oil in each pipeline together, and replace with a new oil filter element. Open the screw plug of the oil filler, inject new oil, make the oil level within the range of the oil scale mark, tighten the screw plug of the oil filler, and check whether there is leakage. The smooth oil shall be checked frequently during operation. If the oil level is found to be too low, the new oil shall be added in time. Condensate shall also be discharged frequently during operation of the smooth oil. In general, it shall be discharged once a week, and in high-temperature climate, it shall be discharged once every 2-3 days. Shut down for more than 4 hours, open the oil valve when there is no pressure in the oil and gas barrel, drain the condensed water, and quickly close the valve when there is oil flowing out. It is forbidden to mix and use different brands of smooth oil, and it is forbidden to use the smooth oil beyond the time limit. Otherwise, the quality of smooth oil will decline, the smoothness will be poor, and the flash point will drop. It is very simple to shut down at high temperature, causing spontaneous combustion of oil products.