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随着石油化学工业的发展,用泵抽送高温易燃、易爆和有毒等特殊液体逐渐增多,密封的使用条件更加复杂苛刻。本文介绍机械密封装置在高温萘油泵上的一个成功用例。萘油泵密封装置的工作条件:泵型80Y—60,泵轴直径φ35毫米,泵轴转速2950转/分,介质萘油,压力4公斤/厘米~2,温度260℃。(萘油泵低于80℃时产生片状结晶物,开泵和停泵时要用压力为8公斤的蒸汽进行清理)。从上列数据看出,密封装置必须在高温恶劣条件下工作。但在我国JB1472-75标准中所列的机械密封中,所使用的O形圈、
With the development of the petrochemical industry, pumping of high temperature flammable, explosive and toxic special liquid gradually increased, the sealing conditions of use more complex and demanding. This article describes a successful use case of a mechanical seal on a high temperature naphthalene oil pump. Naphthalene oil pump sealing device operating conditions: pump type 80Y-60, shaft diameter φ35 mm, shaft speed 2950 rev / min, medium naphthalene oil, pressure 4 kg / cm ~ 2, temperature 260 ℃. (Naphthalene oil pump below 80 ℃ produce flaky crystals, open the pump and stop the pump with a pressure of 8 kg of steam to clean). Seen from the above data, the sealing device must work under harsh conditions of high temperature. However, in our country JB1472-75 standard listed in the mechanical seal, the use of O-ring,