Normal-temperature self-gas-sealing device for bearing

Abstract

A normal-temperature self-gas-sealing device for a bearing comprises a static seal part, a movable seal part and the bearing. The static seal part comprises a bearing pedestal bottom cover and a bearing pedestal upper cover. The bearing pedestal bottom cover is composed of a bottom plate inner lip part, a bottom plate outer lip part and a bottom plate. The bearing pedestal upper cover is composed of an upper cover inner lip part, an upper cover outer lip part and a connection plate. The upper cover outer lip part and the bottom plate outer lip part are connected in an extending manner. A lubrication chamber used for storing lubricating oil is formed between the bearing pedestal bottom cover and the bearing pedestal upper cover. The movable seal part comprises a shaft lip part A and a shaft lip part B which are arranged on a stirring shaft in a sleeving manner. The shaft lip part A is located between the bottom plate inner lip part and the bottom plate outer lip part in the radial direction. The shaft lip part A, the bottom plate outer lip part and the upper cover outer lip part are buckled in a staggered manner in the axial direction. The shaft lip part B and the upper cover inner lip part are buckled in a staggered manner in the axial direction. The upper cover inner lip part is located in the shaft lip part B. The bearing is located between the bottom plate inner lip part and the shaft lip part A in the radial direction. The normal-temperature self-gas-sealing device can be suitable for high-sped or low-speed stirring reactions and can be suitable for both inert gas shielding reactions and reaction systems with toxic and harmful gas.

Description

technical field [0001] The invention relates to the technical field of bearing sealing, in particular to a bearing normal pressure self-air sealing device. Background technique [0002] In the field of chemical industry, it is often faced with the problem of chemical reactions at atmospheric pressure that require both stirring and hermetic sealing. For example, inert gas protection reactions, or products and reactants containing toxic and volatile substances, or non-toxic but inexpensive volatile reactants or products, all require a relatively independent reaction space, and at the same time require Stir. For this problem, there are currently three methods: one is to install a shaft sealing device outside the bearing; the other is to install a sealing device with a sealing lip between the inner and outer bearings; the third is to continuously feed the reaction system Inert gas, so as to achieve the purpose of air-tight reaction or inert gas protection under stirring condit...

AI Technical Summary

Problems solved by technology

The first and second methods cannot solve the problem of "sliding friction is easy to generate heat, waste power and easily damage friction parts". It can still be used for reactions that only require low-speed stirring, but for those that require high-speed stirring React simply cannot be used

The third method, for the inert gas protection reaction, continuously feeds the inert gas. Although it can solve the problem of high-speed stirring reaction, it faces a large amount of inert gas waste. It is necessary to avoid the waste of inert gas, or for products and reactants containing toxic substances. of volatile substances, the third method is powerless

As an improvement of the third method, adding an inert gas circulation device can reduce the waste of inert gas, but at the same time increases equipment investment

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