Hole cluster end face mechanical sealing structure like sensitive plant type

Abstract

A hole cluster end face mechanical sealing structure like a sensitive plant type comprises a movable ring and a static ring. One side of an end face of the movable ring and one side of an end face of the static ring serve as high pressure sides, namely upstream, and the other side of the end face of the movable ring and the other side of the end face of the static ring serve as low pressure sides, namely downstream. A movable pressure type hole cluster which is composed of a directional millimeter level hole cluster and like a sensitive plant type is evenly distributed on at least one end face of the movable ring or the static ring in the circumferential direction. An annular belt is arranged at the upstream of the end faces, and an annular sealing dam with the smooth surface is arranged at the downstream of the annular belt. The hole cluster end face mechanical sealing structure like the sensitive plant type has the advantage that double rows of inclined holes which are circumferentially and symmetrically arranged are suitable for one-way rotating machinery and two-way rotating machinery, the fluid movable pressure effect generated by the inclined holes can enhance the quick opening capacity of the end faces in the low-speed low-pressure situation, radial holes formed in the upstream sides have flow guide functions and functions of improving the lubricating states between the end faces, the upstream pumping function of the inclined hole cluster reduces the leakage rate, the millimeter level holes have the advantage of absorbing large-diameter solid particles, the wear resistance is improved, and long-time stable operation of mechanical sealing in the severe work condition is guaranteed.

Description

technical field [0001] The invention relates to a mechanical sealing device of a fluid machine, which is suitable for the shaft end sealing device of the rotary shafts of compressors, pumps and kettle agitators in the fields of aerospace, petroleum and petrochemical, energy and electric power, and chemical and pharmaceutical industries, and particularly relates to a shy Grass-shaped hole cluster end face mechanical seal structure, especially suitable for liquid sealing occasions. Background technique [0002] Mechanical seal technology has been widely used in aerospace, petrochemical, energy and power, chemical and pharmaceutical fields. With the development of science and technology, higher requirements have been put forward for mechanical seals. While reducing the leakage rate, it is required Reduce the temperature of the end face, reduce thermal deformation, increase the wear resistance of the end face, etc. Compared with traditional mechanical seals, non-contact mechani...

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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing sealing technology such as limited dynamic pressure effect, insufficient pressure and wear resistance, poor start-stop effect at low speed and low pressure, large leakage rate, and unsuitable for bidirectional rotation, etc., the present invention proposes a dynamic sealing technology. Good pressure effect, good start-stop effect at low speed and low pressure, low leakage rate, excellent end face lubrication and cooling effect, suitable for bidirectional rotation, high reliability, and long service life Mimosa-like millimeter-level upstream pumping hole cluster end face mechanical seal structure

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