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发明公开
CN102619776A 风机中主轴的气密封装置 无效 - 撤回

风机中主轴的气密封装置
摘要：
本发明涉及一种风机中主轴的气密封装置，包括套装在主轴外部的波纹节，波纹节的一端与风机后侧板相密封连接，波纹节的另一端与轴承座相密封连接，所述波纹节上设置有氮气接口，氮气接口连接氮气源，氮气源的气体压力不小于风机输送气体的压力。本发明适用于高温离心防爆型风机，其结构简单、成本低廉，在目前所使用的高温离心风机中主轴处稍作改进，就能实现可靠的密封，并且使用寿命长、维修简单。
摘要（英）：

The invention relates to an air sealing device for a main shaft in a fan. The air sealing device comprises a corrugated section which is sleeved outside the main shaft. One end of the corrugated section is in sealing connection with a rear side plate of the fan, and the other end of the corrugated section is in sealing connection with a bearing block. A nitrogen port is formed in the corrugated section, and is connected with a nitrogen source. The gas pressure of the nitrogen source is not lower than the pressure of a gas delivered by the fan. The air sealing device is applied to a high-temperature centrifugal explosion-proof fan, and is simple in structure, low in cost, long in service life and easy to maintain; and reliable sealing can be realized only by making little improvement on the main shaft in the conventional high-temperature centrifugal fan.

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