High-pressure controllable slide valve type mechanical combination sealing system

Abstract

The invention discloses a high-pressure controllable slide-valve type mechanical combined sealing system. The system comprises a controllable slide valve stationary seal assembly and a rotating mechanical seal assembly; the controllable slide valve stationary seal assemble comprises a slide valve gland (13), a slide valve (11) and a tapered shaft sleeve (12) sheathed on a shaft shoulder, the tapered shaft sleeve (12) is positioned inside the slide valve gland (13), the slide valve (11) which is partially positioned in a flange (16) is hermetically connected with the tapered shaft sleeve (12) in a sliding way, and the flange (16) is provided with a pressure source channel I (161) and a pressure source channel II (162) which are respectively used for controlling the slide valve (11) to slide leftwards or slide rightwards; the rotating mechanical seal assembly comprises a rotating seat (9) which is fixedly connected with a shaft sleeve (10), a rotating ring (17) and a stationary ring (7) which are closely jointed on a seal face and the like. The sealing system can help greatly reduce and avoid leakage of dangerous fluid and serious accidents.

Description

technical field [0001] The invention relates to a combined rotary shaft seal, more specifically a combined rotary shaft seal composed of a multi-stage sealing structure, which belongs to the technical field of sealing. Background technique [0002] The combined sealing system is widely used in fluid machinery and other transmission power equipment to meet the needs of sealing and maintenance in different operating conditions. At present, the traditional combined seals that are widely used mainly include packing-mechanical seals, mechanical seals- Inflatable seal, auxiliary impeller-slide valve seal, mechanical seal-centrifugal parking seal, etc. [0003] The packing-mechanical seal combined seal is a combined seal used in combination with a packing seal and a rotary combined seal. The packing seal can be used as a backup rotary seal of the mechanical seal and an emergency seal in the parking state, and can realize high-pressure sealing. However, its overall axial length is ...

AI Technical Summary

Problems solved by technology

This type of sealing structure is also relatively simple and does not require external human intervention. However, the existence of the centrifuge often reduces the dynamic stability of the rotating spindle, so it is not suitable for use at high speeds, and the sealing pressure in the parking state is not high.

[0007] To sum up, most of the combined sealing products commonly used at present have low parking sealing pressure, poor sealing reliability, and poor operability for maintenance of sealing components, and none of them can meet the high-pressure reliable sealing of hazardous chemical media and the online pressure of sealing components. Disassembly and replacement

Images