Low-vacuum high-temperature carrier gas circulating pump and high-temperature carrier gas driving method and application thereof

The invention discloses a low-vacuum high-temperature carrier gas circulating pump. The low-vacuum high-temperature carrier gas circulating pump comprises a gas driving device, an output driving device and a transmission device arranged between the gas driving device and the output driving device. According to the low-vacuum high-temperature carrier gas circulating pump, the gas driving device is driven by a gas source to rotate, and then a power blade is driven by the transmission device to rotate, so that gas circulation is realized. According to the low-vacuum high-temperature carrier gas circulating pump, the problem that a traditional motor-driven blade cannot work normally due to the fact that magnetism is damaged by high-temperature gas is solved, and the requirement of a high-temperature gas circulating experiment is met. In addition, a gas driving cavity, a connecting shaft cavity and an output driving cavity are matched to form a closed space, and when gas which is the same as high-temperature gas a