本发明公开一种核燃料包壳管双轴蠕变稳压单元，包括供气源、增压组件、稳压组件；所述供气源用于向包壳管提供增压用的气体介质；所述稳压组件与供气源连接，稳压组件用于调节供气源提供的气体介质的压力；所述增压组件连接于稳压组件与包壳管之间，增压组件用于对气体介质进行增压，并将增压后的气体介质输出至包壳管内。本发明采用PWM高频无泄漏电磁阀进行泄压控压，消除充压过程中，因高温真空炉的温度变化而带来的压力波动问题，同时，采用恒温缓冲器消除环境温度变化对压力波动的影响，可实现输出压力可调、升压速率可调、长周期内输出高精度稳定的压力等功能，同时，可减少空气压缩机工作时间和启动频率，达到节能的目的。

The invention discloses a biaxial creep pressure stabilizing unit of a nuclear fuel cladding tube, which comprises an air supply source, a pressurization component and a pressure stabilizing component. The air supply source is used to provide a pressurized gas medium for the cladding tube; The pressure stabilizer component is connected with the air supply source, and the pressure stabilizer component is used to adjust the pressure of the gas medium provided by the air supply source; The pressurization component is connected between the regulator component and the cladding tube. The pressurization component is used to pressurize the gas medium and output the pressurized gas medium to the cladding tube. The invention adopts PWM high frequency non-leakage solenoid valve for pressure relief and pressure control, eliminating pressure fluctuation caused by temperature change of high temperature vacuum furnace in the process of charging. Meanwhile, constant temperature buffer is adopted to eliminate the influence of environmental temperature change on pressure fluctuation, which can realize adjustable output pressure, adjustable pressure boost rate, high precision and stable output pressure in a long period, and other functions. It can reduce the working time and startup frequency of the air compressor to achieve the purpose of energy saving.