关键词: 低温, BOG 压缩机, 立式迷宫, 隔冷结构, 流量调节

Abstract: As the operating temperature is extremely low (-161℃), the materials of the parts that are in contact with low-temperature media in a cryogenic (low-temperature) BOG compressor are prone to be coldly crisp and broken. The conduction of the coldness to the lubrication and motion system can make the compressor unable to work properly. Therefore, such equipment in China is long-term dependent on imports. Combined with operating conditions, the China Huanqiu Contracting & Engineering Corp. and Shenyang Yuanda Compressor Co. Ltd. developed jointly an ultra-low temperature, easy-forming material - cryogenic ductile iron (spheroidal graphite cast iron) or nodular cast iron material and cold-insulation structure with excellent mechanical properties at low temperature. The cooling capacity is guided to the lubricating oil cooling system of the compressor through the cold-isolation structure, which avoids the transmission of the cooling capacity in the cryogenic components to the room temperature parts through the medium body, and realizes the recycling of the cold energy. The product uses a vertical labyrinth (maze) structure, making the wearing parts greatly reduced. The operation is economy, and can achieve flow adjustment in various gears. The actual operation shows that the compressor performance fully meets the design target of expectations.