Ultrahigh-temperature lubricating device

The utility model belongs to the technical field of mechanical engineering and provides an ultrahigh-temperature lubricating device which mainly comprises an oil tank (1), an electric heating element, a high-temperature-resistant main oil pump (5), an oil return pump (9), a filter (6), an overflow valve (7), a throttle valve (8) and a cooling element. One end of the main oil pump (5) is communicated with the oil tank (1), and the other end of the main oil pump (5) is connected to a test bearing of a tester through the filter (6), the overflow valve (7) and the throttle valve (8), so that an oil supply pipeline providing the test bearing with lubricating oil is formed. One end of the oil return pump (9) is communicated with a lubricating oil storage chamber, namely a main oil tank, of the tester, and the other end of the oil return pump (9) is communicated with the oil tank (1) through the cooling element, so that an oil return pipeline is formed. The ultrahigh-temperature lubricating device has the advantages