Seal monitoring device of immersed pump

Abstract

The invention discloses a seal monitoring device of an immersed pump, and belongs to the technical field of marine machinery. An auxiliary seal monitoring component is arranged on a main pump body, sothat a seal cavity is formed among the auxiliary seal monitoring component, the main pump body and a connecting shaft. Monitoring oil is poured into a monitoring box and enters the seal cavity alonga connecting pipe for connecting the monitoring box with the seal cavity until the seal cavity is filled, and gas inside the seal cavity is exhausted by an exhaust pipe. The pressure of the monitoringoil is lower than that of hydraulic oil inside the main pump body, when a mechanical seal between the main pump body and the connecting shaft is damaged, the hydraulic oil inside the main pump body can be leaked into the seal cavity, so that the volume of the monitoring oil inside the seal cavity is increased, part of the monitoring oil is extruded into the monitoring box, and the position of themonitoring oil inside the monitoring box can rise. A worker can judge whether the mechanical seal between the main pump body and the connecting shaft is damaged according to the volume change of themonitoring oil inside the monitoring box, and then the mechanical seal can be changed or maintained timely, so that the working stability of the immersed pump is improved.

Description

technical field [0001] The invention relates to the technical field of marine machinery, in particular to a submersible pump seal monitoring device. Background technique [0002] A submersible pump is a pump that is immersed in the liquid cargo tank of an oil tanker for liquid cargo transfer, and is widely used in oil tankers such as product oil tankers and chemical tankers. The structure of the submersible pump mainly includes the pump main body and the impeller, and the pump main body and the impeller are connected through a connecting shaft. The part connected between the pump body and the impeller needs to be immersed in the liquid cargo medium to realize the function of the pump body and the impeller to extract the liquid cargo medium and transport it to other parts. Prevent the hydraulic oil in the pump main body from seeping into the liquid cargo medium, which will affect the normal operation of the submersible pump. [0003] However, since the part connecting the p...

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Problems solved by technology

[0003] However, since the part connecting the pump main body and the impeller is immersed in the liquid cargo medium, even if the mechanical seal at the part where the pump main body is connected to the connecting shaft is damaged and the hydraulic oil in the pump main body seeps into the liquid cargo medium, it is difficult for the staff to notice , the working stability of the submersible pump is affected

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