Self-lubricating system and method of sea water pump

Abstract

The invention discloses a self-lubricating system and method of a sea water pump. The self-lubricating system of the sea water pump comprises a main pipeline, an external water pipeline and two backwashing pipelines. A first gate valve, a booster water pump, a second gate valve, a two-position two-way valve, a pressure transmitter and a flow switch are sequentially arranged on the main pipeline. The two-position two-way valve is arranged on the external pipeline, one end of one backwashing pipeline is connected with a sewage discharge pipe, and the other end of one backwashing pipeline is connected with one two-position three-way valve. One end of the other backwashing pipeline is communicated with the main pipeline, and the other end of the other backwashing pipeline is connected with the other two-position three-way valve. Sea water of a pump set itself is fetched from a pump set discharge opening and used as a lubricating water source, after the water source is filtered by a filter, a large part of the water source is used as pump set lubricating water, a small part of the water source is used as a backwashing water source, therefore, fresh water resources are saved, energy is saved, environment friendliness is achieved, and the function that the sea water pump is safely and stably operated for a long time is guaranteed.

Description

technical field [0001] The invention relates to the technical field of fluid machinery, in particular to a seawater pump self-lubricating system and a self-lubricating method. Background technique [0002] Existing seawater pump lubricating water system, such as Figure 4 As shown, there are the following disadvantages: [0003] 1. Most of the water intake is external lubricating water, which causes a waste of precious fresh water resources and violates the country's call for energy conservation and emission reduction during the "Twelfth Five-Year Plan" period. [0004] 2. Most of the self-lubricating filters are Y-type filters 15, and Y-type filters 15 generally have defects such as small dirt holding capacity, easy to be blocked by dirt, complicated cleaning work, and will affect the work of the pump group during the cleaning process. [0005] 3. The backwashing mode of the existing filter is backwashing with external source pressure water, which needs to provide clean ex...

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Problems solved by technology

[0004] 2. Most of the self-lubricating filters are Y-type filters 15. Y-type filters generally have defects such as small dirt holding capacity, easy to be blocked by dirt, complicated cleaning work, and will affect the work of the pump unit during the cleaning process.

[0005] 3. The backwashing mode of the existing filter is backwashing with external source pressure water, which needs to provide clean external source pressure water throughout the process, resulting in waste of resources, and if there is a problem with the external source pressure water (such as unstable water volume, polluted water source, etc.) , the filter backwash will fail, resulting in safety hazards

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