Large-scale cryogenic refrigeration equipment is the sole way to realize the cryogenic environment for scientific facilities such as space technology, quantum computer and magnetic levitation. As one of the key moving components in cryogenic system, the helium compressor determines the reliability and performance of the whole cryogenic system. The twin screw compressor is a promising choice to be used in large-scale cryogenic refrigeration system due to its high efficiency and reliability. It can also be used in helium refrigeration cycle to produce liquid hydrogen for hydrogen fuel cells which are paid much attention recently. This paper presents the development of a high-efficiency oil-injected helium twin-screw compressor. In order to realize its high efficiency and reliability, several methods were adopted to overcome some intractable problems about leakage and high temperature rise. The profile was designed specially for this application. Optimized design and control of clearances were planned to compensate the thermal deformation due to the heat of compression. In addition, a special layout of two-stage mechanical seal was established to prevent helium from leaking into outside environment. To keep the purity of helium, the combined oil separator was selected to separate oil from discharge helium. Moreover, a performance test of the compressor has been carried out. The results demonstrate that the developed oil-injected helium twin-screw compressor has excellent performance.

大型低温制冷设备是实现诸如航天技术，量子计算机和磁悬浮等科学设施的低温环境的唯一途径。氦压缩机作为低温系统中的关键运动部件之一，决定了整个低温系统的可靠性和性能。双螺杆压缩机由于其高效率和可靠性而成为在大型低温制冷系统中使用的有前途的选择。它也可以用于氦制冷循环中以生产氢燃料电池的液态氢，这是近来备受关注的问题。本文介绍了一种高效喷油氦双螺杆压缩机的开发。为了实现其高效率和可靠性，采取了几种方法来克服一些有关泄漏和高温升高的棘手问题。该配置文件是专门为此应用程序设计的。规划了间隙的优化设计和控制，以补偿由于压缩热而引起的热变形。此外，建立了特殊的两级机械密封布局，以防止氦气泄漏到外部环境中。为了保持氦的纯度，选择了组合式油分离器以从排出的氦中分离出油。此外，已经进行了压缩机的性能测试。结果表明，所开发的注油氦双螺杆压缩机具有优异的性能。规划了间隙的优化设计和控制，以补偿由于压缩热而引起的热变形。此外，建立了特殊的两级机械密封布局，以防止氦气泄漏到外部环境中。为了保持氦的纯度，选择了组合式油分离器以从排出的氦中分离出油。此外，已经进行了压缩机的性能测试。结果表明，所开发的注油氦双螺杆压缩机具有优异的性能。规划了间隙的优化设计和控制，以补偿由于压缩热而引起的热变形。此外，建立了特殊的两级机械密封布局，以防止氦气泄漏到外部环境中。为了保持氦的纯度，选择了组合式油分离器以从排出的氦中分离出油。此外，已经进行了压缩机的性能测试。结果表明，所开发的注油氦双螺杆压缩机具有优异的性能。选择组合式油分离器以从排出的氦中分离出油。此外，已经进行了压缩机的性能测试。结果表明，所开发的注油氦双螺杆压缩机具有优异的性能。选择组合式油分离器以从排出的氦中分离出油。此外，已经进行了压缩机的性能测试。结果表明，所开发的注油氦双螺杆压缩机具有优异的性能。