Low-temperature device of rolling contact fatigue test machine

The invention belongs to the technical field of rolling contact fatigue test equipment, and discloses a low-temperature device of a rolling contact fatigue test machine. The device is characterized inthat a computer is connected with a data collector through a second data line, and the data collector is connected with a temperature sensor in a low-temperature air chamber through a first data line; the low-temperature air chamber is connected with a gas-liquid separator through a mixed oil-gas pipe, and the lower end of the gas-liquid separator is provided with an oil outlet pipe; the gas-liquid separator is connected with a refrigerating device through a normal-temperature gas pipe, and the refrigerating device is provided with a water inlet pipe and a water outlet pipe; the low-temperature air chamber is connected with the refrigerating device through a low-temperature gas pipe, and the computer is connected with the refrigerating device through a third data line. According to the invention, the test environ