Cooling device for natural gas oil injection screw rod compressor

Abstract

The invention discloses a cooling device for a natural gas oil injection screw rod compressor, and relates to the technical field of screw rod compressors. The cooling device solves the technical problems of air exhausting and lubricating oil of a cooling compressor. The device comprises a ventilation cavity, a cooling cover shell, an air side cooler, an oil side cooler and cooling fans, and the cooling cover shell, the air side cooler, the oil side cooler and the cooling fan are respectively arranged in the ventilation cavity. A ventilation opening is formed in the ventilation cavity. The cooling device is characterized in that an inner cavity of the cooling cover shell is separated into an air output channel and two air input channels by partition plates. Outlets of the two air input channels pass through the air output channel and are led out of the cooling cover shell, and the air side cooler and the oil side cooler are arranged on the outlet portions of the two air input channels respectively. The two cooling fans are arranged on the inlet portions of the two air input channels respectively, and the air output ends of the two cooling fans exactly face inlets of the two air input channels respectively. The cooling device is suitable for the natural gas oil injection screw rod compressor.

Description

technical field [0001] The invention relates to screw compressor technology, in particular to a cooling device for natural gas oil-injected screw compressors. Background technique [0002] The natural gas oil-injected screw compressor is equipped with a gas cooler and a lubricating oil cooler, which are respectively used to cool the exhaust gas and lubricating oil of the natural gas oil-injected screw compressor, so that the temperature of the exhaust gas and lubricating oil can meet the requirements. [0003] Natural gas is flammable and explosive. For the exhaust temperature of the process gas, it is generally required to be lower than the ambient temperature +10°C in summer, and the exhaust temperature is required to be 5-15°C in winter. However, in the existing natural gas oil-injected screw compressor, the gas cooler and the lubricating oil cooler are installed in the same ventilation cavity, and share a fan to realize heat dissipation, and the start and stop of the fan...

AI Technical Summary

Problems solved by technology

Therefore, when the lubricating oil temperature does not meet the fan start-up conditions, the gas cooler will cause the exhaust temperature of the compressor to be too high because there is no cooling wind to help it dissipate heat. Similarly, when the lubricating oil temperature meets the fan start-up conditions, the gas cooler will The exhaust temperature of the compressor will be too low due to the cooling air to help it dissipate heat.

[0004] For example, when the natural gas oil-injected screw compressor is first started in summer, since the lubricating oil temperature does not meet the fan start-up conditions, the gas cooler cannot be used to dissipate heat from the compressor exhaust, which will cause the compressor exhaust temperature to fail to meet the requirements;

[0005] As another example, when the compressor exhaust does not need heat dissipation (such as when the ambient temperature is -30°C in winter), if the lubricating oil temperature meets the fan start-up conditions, the fan will blow air to simultaneously dissipate heat from the gas cooler and lubricating oil cooler , so that the gas cooler can dissipate heat from the compressor exhaust, causing the compressor exhaust temperature to drop to about -20°C, which will cause the exhaust pipeline to freeze and freeze, causing irreparable losses

[0006] In addition, the gas cooler and lubricating oil cooler in the existing natural gas oil-injected screw compressor have single functions, and only play a cooling role for compressor exhaust and lubricating oil, and their use needs to be further expanded

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