Two-stage conical surface-end surface series contact type mechanical sealing device for sewage pump

Abstract

The invention provides a two-stage conical surface-end surface series contact type mechanical sealing device for a sewage pump, and belongs to the technical field of liquid mechanical sealing devices.The two-stage conical surface-end surface series contact type mechanical sealing device comprises a rotating shaft, wherein a shaft sleeve is arranged on the outer side of the rotating shaft in a sleeving mode, a main sealing assembly body and a secondary sealing assembly body are arranged on the outer side of the shaft sleeve in a series connection and sleeving mode, and a main sealing side gland and a secondary sealing side gland are correspondingly arranged on the outer sides of the main sealing assembly body and the secondary sealing assembly body correspondingly; and a sealing device fixing body is arranged on one side of the main sealing side gland, the other side of the main sealing side gland is matched with the secondary sealing side gland, and the main sealing side gland, the sealing device fixing body and the sealing side gland are connected and fixed to form a whole. According to the two-stage conical surface-end surface series contact type mechanical sealing device, a main sealing movable ring and a main sealing static ring are in conical surface sealing fit, so that the adhesion wear degree of suspended solid particles in a medium is reduced; and in addition, a secondary sealing push ring and a secondary sealing static ring are in end surface sealing fit, so that series two-stage sealing is formed, the leakage amount is effectively reduced, and the sealing safetyand stability are improved.

Description

technical field [0001] The invention belongs to the technical field of liquid mechanical seal devices, and in particular relates to a two-stage cone-end face series contact mechanical seal device for sewage pumps. Background technique [0002] As a device used to solve the sealing between the rotating shaft and the body, the mechanical seal mainly relies on the preloading of the elastic element on the end face seal pair of the moving ring and the static ring, and the compression of the medium pressure and the elastic element to achieve the axial end face of the seal. Sealing means. Mechanical seals are widely used in rotating machinery such as compressors, pumps, and reactors due to their significant performance advantages such as low leakage, low power consumption, and long life. The application of high-tech equipment such as high-tech equipment puts forward higher requirements for low power consumption and high reliability of the seal. [0003] Sewage pump is a device th...

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, it is often impossible to effectively prevent the leakage of the sealed medium due to many reasons, especially the failure of the blocking fluid auxiliary system, especially for process pumps that transport high-solid particle media, frequently start and stop, and are easy to evacuate , the reliability of the seal is far from satisfactory

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