Vertical centrifugal oil pump

Abstract

The invention relates to the field of fluid machinery, in particular to a vertical centrifugal oil pump. The vertical centrifugal oil pump comprises a pump body, wherein a pump cover is connected to the bottom end of the pump body; a bearing bracket is connected to the upper end of the pump body; a main shaft is mounted inside the bearing bracket through a bearing; the tail end of the main shaft is connected with the impeller; a sealing ring is connected to the pump body, and a gap is formed between the sealing ring and the impeller; an oil draining hole is formed in the side wall of the pump body above the sealing ring on the back side of the impeller; a pump base is connected to the upper end of the bearing bracket; the oil pump is integrally arranged vertically; the pump base is connected to the top of an oil tank; a part below the pump base stretches into the oil tank; the outlet of the pump body is connected with an oil outlet pipeline. The oil pump is integrally mounted inside the oil tank, and the pump body and the impeller are immersed in oil, so that the leakage problem of the original mechanical seal is solved, the vertical centrifugal oil pump is compact in structure and less in area occupation, and the problems that auxiliary mechanical mounting of a horizontal oil pump on the oil tank of a centralized oil station is difficult and the like are solved; the minimum liquid level of the pump is greatly lowered while an axial force is balanced, so that the effective volume of the oil tank is increased.

Description

technical field [0001] The invention relates to the field of fluid machinery, in particular to a vertical centrifugal oil pump for transporting lubricating oil. Background technique [0002] When large-scale mechanical equipment such as steam turbines, oxygen generators, compressors, multi-stage axial flow fans, and auxiliary machinery are in operation, lubricating oil and hydraulic oil must be supplied from oil stations. Existing fuel pumps such as figure 1 As shown, a horizontal centrifugal pump is used. This horizontally arranged centrifugal pump must be equipped with a high-pressure shaft seal, and the main shaft bearing needs to be lubricated. As the service time increases, the shaft seal of the horizontal centrifugal oil pump will age. There are often problems such as oil leakage, insufficient bearing lubrication, and large vibration and noise. [0003] Traditional vertical centrifugal pumps (ie submerged pumps) are mainly used in occasions where the medium is water....

AI Technical Summary

Problems solved by technology

The installation position of the traditional check valve has the problem that it is difficult to open the backup pump after the main pump is turned on, because the air compression of the oil outlet pipeline of the backup pump causes the outlet pressure of the oil pump to be too high

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