Centrifugal type slurry pump

Abstract

The invention discloses a centrifugal type slurry pump. The centrifugal type slurry pump comprises a pump cover, a pump shell connected with the pump cover, a bearing base connected with the pump shell, an impeller positioned in the pump shell and a rotary main shaft connected with the impeller, wherein the rotary main shaft extends out of the pump shell, and is connected with the bearing base; a shaft seal is arranged on a contact part of the rotary main shaft and the pump shell; the shaft seal comprises a sealing box connected with the pump shell, a sealing box pressure cover, a main seal close to the pump shell side, and a secondary seal at the rear side of the main seal; the secondary seal is an external type mechanical seal; the main seal is formed by superposing a plurality of lip-shaped sealing rings; the lip-shaped sealing rings are sealing rings with filter devices; each sealing ring with the filter device comprises a ring-shaped rubber basal body and a reinforcing framework embedded into the rubber basal body, wherein a sealing lip is arranged at the inner ring of the rubber basal body, one side of the rubber basal body is a flow-in side, the other side of the rubber basal body is a flow-out side, a filter part is arranged between the rubber basal body and the sealing lip, and the filter part comprises an accommodating cavity filled with a filter element body and a penetrating channel for enabling the accommodating cavity to communicate with the flow-out side of the rubber basal body;and slurry enters each accommodating cavity from the corresponding flow-in side, and is filtered through the corresponding filter element body, so that filtered clean liquor enters the corresponding flow-out side from the corresponding penetrating channel.

Description

technical field [0001] The invention relates to the field of centrifugal pump manufacture. Background technique [0002] Centrifugal slurry pump is a common conveying equipment used to transport various slurries in the industrial field. It is widely used in chemical industry, smelting, mineral product processing, environmental protection engineering and other industrial fields. At present, there are several centrifugal slurry pumps in operation in China. million units. [0003] Commonly used seals for centrifugal slurry pumps include double-end mechanical seals, lip-shaped rubber dynamic seals, packing seals, etc. These seals have two problems that have been difficult to solve for a long time, namely: first, solids such as sand will enter the seal combination, The shaft seal is worn out; the second is that no matter what kind of pump shaft seal it is, it will damage the seal due to rotation, friction and heat. In order to solve the above problems, the common method is to c...

AI Technical Summary

Problems solved by technology

Flushing with cooling water can properly increase the service life of the seal, but it must consume a large amount of cooling water. Each pump consumes more than 4 tons of water resources per day. At the same time, secondary pollution of cooling water will occur, increasing the pressure of wastewater treatment. thereby increasing environmental costs

[0004] Furthermore, in the original technology, the seal of the slurry pump cannot run dry without liquid, and the seal will be damaged immediately if it is operated without external cooling water

[0005] Therefore, the above-mentioned shortcomings are problems that have been difficult to solve in the industry for a long time, and there is no effective solution so far, and there is no product that can effectively overcome such problems on the market, so there is still room for innovation and improvement

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