A mechanical seal preload adjustment device

Abstract

The invention provides a mechanical seal pretightening force adjusting device. The device comprises four parts, namely an adjusting sleeve, a bolt set, a locking nut set and a bearing cover; the adjusting sleeve is coaxial with the bearing cover, and two surfaces are in bolt connection through the bolt set and locking nuts; the adjusting sleeve is inserted in the bearing cover; the flange outer side surface of the adjusting sleeve, the flange inner side surface of the adjusting sleeve, the small flange outer side surface of the bearing cover and the small flange inner side surface of the bearing cover are arranged in sequence to guarantee a correct mounting direction; through separate fixation by multipoint nuts, the device can continuously work under the condition of failure of one nut; the perpendicularity between the surface of a stationary seal ring and a shaft is strictly guaranteed through precise measurement, so that uniform distribution of pretightening force is guaranteed; the bearing cover and the adjusting sleeve are central symmetry rotating pieces, and can be machined through turning to guarantee higher surface roughness, peripheral degree and coaxiality; and as the multipoint nuts are used for locking, the adjustment is convenient and fast, and the time is saved when vibration is resisted. The device is simple in structure and excellent in manufacturability, and achieves a practical value.

Description

technical field [0001] The invention relates to a mechanical seal pretightening force adjustment device, in particular to an adjustment device applied to a vibration test bench with strict requirements on vibration resistance, anti-loosening and stepless adjustment of pretightening force. It belongs to the technical field of mechanical seals. Background technique [0002] The repeated and random high-intensity vibration on the vibration test bench and the rapid adjustment requirements of the mechanical seal experiment make the anti-vibration, anti-loosening and stepless adjustment of the pre-tightening force of the mechanical seal an urgent problem to be solved. Since there are very few mechanical seal vibration test benches at present, the existing mechanical seal pretightening force adjustment devices cannot withstand high-intensity and repeated vibrations, and will gradually loosen, making the mechanical seal have no pretightening force, resulting in test failure. In ord...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mechanical seal pre-tightening force adjustment device, which overcomes the lack of anti-loosening in the prior art, and avoids mechanical anti-loosening by adding stoppers so that the pre-tightening force can only be adjusted step by step It provides a mechanical seal pre-tightening force adjustment device that does not require mechanical loosening of stoppers, and can be quickly adjusted through frictional anti-loosening and pre-tightening force.

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