A Cooling Structure of Centrifugal Water Pump Shaft Seal

Abstract

The invention discloses a cooling structure of a centrifugal pump shaft seal. The cooling structure is characterized in that a flow channel is arranged in a centrifugal pump shaft seal base, the flow channel is composed of two through holes which are perpendicular to each other and intersect, one through hole is parallel to the axis of the shaft seal base and is close to the outer side of the shaft seal base, the other through hole is perpendicular to the axis of the shaft seal base and is arranged in the radial direction, and a blocking stopper is arranged at the hole opening, leading to the exterior of the shaft seal base, of the through hole which is arranged in the radial direction; when a centrifugal pump works, water pressure around an impeller and water pressure in the flow channel are larger than water pressure in a shaft seal cavity of the shaft seal base, water flows into the shaft seal cavity through the flow channel, the water in the shaft seal cavity is thrown out along with back blades of the impeller, a loop is formed, and friction heat of contact end faces of a static shaft seal ring and a movable shaft seal is guided out in time. By means of the flow channel structure, air in the cavity can be exhausted conveniently when a pump conducts water pre-filling, the friction heat of the contact end faces of the static shaft seal ring and the movable shaft seal ring can be guided out in time, and the service period of the pump is greatly prolonged.

Description

technical field [0001] The invention relates to a cooling structure for a shaft seal of a water pump, and in particular discloses a cooling structure for a shaft seal of a centrifugal water pump. By adding a structure to the shaft seal seat of the water pump, a cooling water circuit is formed with the shaft seal chamber to solve the problem of the shaft seal of the water pump. The problem that the heat cannot be cooled when the water pump turns back and forth is solved. Background technique [0002] Water pumps are widely used in the crushing and transportation of sewage, dirty oil, etc. Due to equipment installation and operating conditions, vertical installation is often used. Before the water pump runs, the water pump needs to be pre-filled with water. At this time, the shaft seal chamber is at the highest point in the pump body, and it is difficult to completely discharge the internal gas. When the water pump starts to run normally, the contact surface of the shaft seal...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the shaft seal of the water pump in the prior art cannot be cooled when the water pump turns and heats up, and discloses a cooling structure for the shaft seal of the centrifugal water pump. A shaft seal cooling structure is added to the seal seat, which not only facilitates the discharge of all the gas in the shaft seal chamber when pre-filling the water pump, but also forms a shaft seal cooling circuit composed of water flow and the shaft seal chamber, and timely leads out the two contacting end surfaces of the shaft seal. frictional heat

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