Screw Drive Compressor

1.Optional setting pressure, and maintain a constant water pressure.

2.To save energy.

3.High efficiency power-saving.

4.More reliable.

5.Energy conservation and environmental protection, equipment in place, enabling immediately.

6.To reduce the noise of the air compressor.

7.Scientific development of energy saving and emission reduction.

8.Prolong the service life of air compressor.

Troubleshooting and Improvement of Excessive Exhaust Temperature of Screw Air Compressor

High exhaust temperature is a more common failure of screw drive compressor, and it is more harmful. Normally the working temperature of screw air compressor is between 65℃～85℃. The higher exhaust temperature of this machine is set to 100℃. When this temperature is exceeded, it will automatically stop and alarm. If the equipment is operated under high exhaust temperature conditions for a long time, the excessively high temperature will cause changes in the physical coefficient values ??of the rotor and bearing materials, causing abnormal friction losses in the bearings, and even bearing loose ball accidents. Excessive oil temperature will also reduce the gas transmission coefficient and increase power consumption, and the viscosity of lubricating oil will also decrease. Excessive temperature will also cause the lubricating oil to undergo thermal decomposition under the catalysis of metals, generating free carbon and acids that are harmful to work. Material and moisture (carbon build-up), in severe cases, the screw of the entire main engine may be stuck or stop jumping. Although the air compressor is equipped with a protection device to prevent high temperature, the existence of the fault causes the device to operate frequently, which affects the normal production of the enterprise. Krupp fluid air compressor manufacturers teach you a few tips.

Troubles Caused by Excessive Oil Temperature of Air Compressor Cooler

Immediately entering the hot summer, the temperature of the air compressor room has exceeded 40°C, and a customer's air compressor high temperature alarm has stopped. Because the system urgently needs to use wind to transport ash, the operator violated the regulations without finding out the cause of the fault. After several startups and stops, the temperature control device was disconnected and the equipment was put into operation. After more than ten minutes of operation, the main engine screw was stuck. . After disassembling the main engine, it was found that the bearings were damaged, the female and male rotors and stators were strained, and the end covers were severely worn. After disassembling the oil cooler, circulation pipeline and other components, analyze and confirm that the cooling water pipeline in the faulty oil cooler is blocked by scale, which causes the efficiency of the lubricating oil radiator to decrease, and the bearing is damaged by the excessively high oil inlet temperature. The increase causes the axial movement and radial displacement of the yin and yang rotors, causing strains on the yin and yang rotors and stators, and serious wear of the end covers. The main reason for the high oil temperature is the failure of the oil cooler. Due to the thin cooling water pipe in the oil cooler, the pipe will be blocked after the water is heated and scaled, resulting in insufficient cooling water flow, and the oil temperature cannot be lowered.

In response to the problems that emerged from the accident, solving the cooling water problem has become a top priority. Most of the failures of the oil cooler are closely related to the water cooling system. The conventional treatment method for the cooling pipeline is to add descaling agent and chemicals to the cooling water, and then pump the pressurized water into the oil cooling water pipeline to soak and repeatedly flush and dredge. This method has a better cleaning effect and can remove the scale. . However, the descaling agent is very corrosive. Frequent flushing will make the pipe wall thinner and affect the pressure resistance and service life of the pipe. To fundamentally solve the problem, we must first start with the water source.

When the cooling water was put into use, drinking tap water was used. With the scarcity of water resources and the rise of water prices, it is not a small economic burden for enterprises. After repeated trials and demonstrations, the use of reclaimed water from the sewage treatment plant to replace drinking tap water as cooling water saves resources and reduces costs. It is a good choice for enterprises in terms of economic benefits and environmental protection. At the same time, it avoids unstable water pressure and large cooling temperature fluctuations caused by the shortage of tap water, and also reduces failures caused by scaling or blockage of the pipe wall of the cooling water system.

1. Install a set of water treatment system to soften, purify and reprocess the reclaimed water so that it is not easy to scale. Use a pressure pump to drive into the cooling pipeline to increase the pressure. Install a filter at the water inlet and clean the filter regularly. This is simple and convenient to maintain, and at the same time reduces the equipment failure rate and prolongs the system life cycle.

2. Remove the original water inlet main pipe, increase the diameter of the pipe mouth (from the original ∮20cm to ∮40cm) to increase the flow area, remove the original backwash water pipe, replace it with a stainless steel pipe with a smooth inner wall and enlarge it The pipe orifice diameter (increased from the original ∮15 cm to ∮20 cm) to reduce the formation of scale on the pipe wall, and the series pipelines in the unit are changed to parallel pipelines. After the transformation, the resistance of the cooling pipeline is reduced, and the amount of water entering the oil cooler is increased, achieving the purpose of lowering the oil temperature and exhaust temperature.

After the system is reformed and used, the cooling effect of the equipment is obviously improved, and the temperature rise phenomenon is basically eliminated. The air quality becomes better, the fuel consumption is reduced, and the efficiency of the air compressor is correspondingly improved. Through the above transformation measures, the air compressor has been running continuously so far, and the phenomenon of high exhaust temperature has basically not occurred again. The air compressor runs for a long time under any weather conditions and load conditions, and the exhaust temperature can also be controlled at 80℃～90℃ In between, it runs completely within the ideal temperature range of the screw drive compressor, and the economic benefits of the enterprise are also significantly improved.

In order to ensure the long-term stable and reliable operation of the screw drive compressor and prolong the service life of the unit, it is necessary to strictly follow the equipment operating procedures, formulate a detailed maintenance plan, regularly check and maintain the equipment, keep the equipment clean, and reduce the intrusion of dust and debris into the oil cooler and cooling. Pipes, etc. to ensure that the cooling system is unobstructed.

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