High-temperature centrifugal pump sealing structure

The invention provides a high-temperature centrifugal pump sealing structure. According to the technical scheme, a mechanical sealing structure and a pump cover structure are improved, and a white oilcirculating passage is introduced to cool and lubricate mechanical seal moving rings. Particular, a mechanical seal stationary ring mounting position is additionally arranged in a pump cover. Meanwhile, a shaft sleeve of an original mechanical seal stationary ring is designed and transformed into a shaft sleeve of the newly mounted mechanical seal moving rings, and the moving rings of two mechanical seals are mounted on the shaft sleeve; a parallel connecting manner is adopted, a pumping ring is newly designed on the shaft sleeve, and the circulating effect of cooling and lubricating double-mechanical-seal white oil is ensured. In addition, a white oil tank is newly added, white oil is circulated among the mechanical seal moving rings, the pump cover and the while oil tank under the action of the pumping ring, th