Dynamic sealing isolation cavity used for rotation component of propellant and explosive dust environment

Abstract

The invention discloses a dynamic sealing isolation cavity used for a rotation component of a propellant and explosive dust environment. The problem that in the propellant and explosive dust environment, propellant and explosive dust deposition and friction exist at the position of the rotation component, andthe burning explosion danger is caused is solved. The dynamic sealing isolation cavity comprises an isolation cavity shell (1), a conductive sponge sealing layer A (2), a conductive sponge sealing layer B (3), a conductive brush sealing layer (4), springs (5), a conductive gasket (6) and bolts (7); the isolation cavity shell (1) comprises a front end face (11), a rear end face (12), a side face (13), a cavity body (14), fixing columns (15), cleaning holes (16), a front shaft hole (17), a rear shaft hole (18) and bolt through holes (19). The dynamic sealing isolation cavity is simple in structure, element replacing and removing are convenient, the spring form is adopted in chaining of the whole device, and hard friction and other dangerous stimulation do not exist during element replacing, soft friction exists in the equipment working process, and dynamic removing of the propellant and explosive dust can be achieved.

Description

technical field [0001] The invention belongs to the field of mechanical design, and relates to a device for external isolation and sealing by using a multi-stage flexible sealing layer, in particular to a dynamic sealing isolation chamber for rotating parts in an explosive dust environment. Background technique [0002] For ordinary materials in the civil industry, the main function of sealing is to isolate dust and prevent leakage. For rotating parts, dynamic seals are used, as long as they can isolate the material, the material can deposit or even rub against the sealing ring. However, for explosives and other hazardous materials industries, the seal can not cause hard friction to the materials while it plays an isolation role. [0003] During the manufacturing process of explosives, a dust environment is often involved, and dust materials, especially ultra-fine dust, can deposit and spread in the gaps of the rotating parts of the equipment, resulting in difficulties in c...

AI Technical Summary

Problems solved by technology

However, due to the relative movement between the bearing seat and the shaft, the gap cannot be zero, which may cause friction once the explosive dust enters the gap and accumulates; on the other hand, because the gap is very small, It is difficult to observe and clean up the entering explosive powder dust, and it is difficult to judge whether the dust enters the bearing, forming a dangerous point

[0005] By searching the prior art, for rotating parts with dust, it is generally sealed in the form of an air seal. For example, patent CN200920111976 discloses a dust-proof sealing device, which uses an air chamber at the end of the shaft, such as a certain pressure of air, to prevent dust from entering the chamber. In the body, on the one hand, the gas leaked in the sealing area will cause additional dust to fly; on the other hand, it cannot prevent the dust from depositing on the outside of the gas chamber in the sealing area, resulting in the hard friction of the seal against the dust

[0006] At present, there are mainly the following problems in the sealing of rotating parts in the dust environment of propellants and explosives: (1) The existing propellants and explosives are sealed with traditional sealing technology, and there is no targeted technical improvement or upgrade, and the safety applicability is not good; ( 2) In the existing sealing forms, there is a risk of hard friction between the seal and the bearing seat or shaft due to explosive dust; (3) It is difficult to judge whether the existing seal is damaged or whether dust enters the seal, and the seal During the replacement of parts, the disassembly workload of the equipment is large, and the risk of accidents during the disassembly process is high

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