Self-circulating lubricating and cooling submerged electric pump

Abstract

The invention relates to a self-circulating lubricating and cooling submerged electric pump. The self-circulating lubricating and cooling submerged electric pump comprises an impeller, a guide vane body and a motor arranged in a motor shell, wherein the motor shell is connected with the guide vane body through a motor end cover of the motor by means of locking screws, the lower end of a main shaft of the motor sequentially penetrates through the motor end cover and the guide vane body to be connected with the external impeller, and the main shaft is supported by the motor end cover and the guide vane body through a radial bearing and a thrust bearing. The self-circulating lubricating and cooling submerged electric pump is characterized in that a bearing chamber is formed by the thrust bearing, the main shaft and the guide vane body in a surrounding mode, an oil pool is packaged through the motor end cover and the guide vane body, a lubricating hole is formed in the guide vane body or the thrust bearing or the main shaft, and the bearing chamber and the oil pool are communicated through the lubricating hole.

Description

technical field [0001] The invention relates to a submersible electric pump, in particular to a submersible electric pump capable of self-circulation lubrication and cooling. Background technique [0002] Large-scale submersible electric pumps are widely used in water conservancy flood control and drainage, industrial and agricultural water transfer, municipal water supply and other occasions. Most of their structures are coaxial connections between the submersible motor and the impeller, one of the hydraulic components. The shaft is equipped with a mechanical seal and withstands axial and radial pressure. Force bearing, its lubrication and cooling depends on the lubricating oil in the oil cavity in the guide vane body, one of the hydraulic components, and plays a cooling role at the same time. Due to structural limitations, the height of the oil level in the oil chamber cannot ensure sufficient lubrication and cooling of the thrust bearing bearing the axial force, so th...

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Problems solved by technology

[0003] Aiming at the problem that the lubrication and cooling effect of the thrust bearing in the existing large-scale submersible pump technology is not good, and the working temperature of the bearing cannot be detected, the present invention provides a simple and effective pump that can solve the above problems with a slight modification on the basis of the original pump. Technical solution, adopting this solution can improve the lubrication and cooling state of the thrust bearing, greatly reduce the working temperature of the bearing, and transmit the working temperature of the bearing to the outside in real time

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