Mechanical seal structure

Abstract

The invention discloses a mechanical seal structure. The mechanical seal structure comprises a sealing port and a sealing cover. A boss is arranged on the outermost side of the sealing port. A sealinghole in the sealing port is a counter bore. The aperture of the portion, at the boss, of the sealing hole is greater than that of the position, on the inner side of the boss, of the sealing hole. Theinner wall of the portion, on the inner side of the boss, of the sealing hole is provided with an internal thread. A unidirectional rotating limiting device is arranged at the boss. The sealing covercomprises a threaded section and a limiting section connected into a whole. An external thread of the threaded section is matched with the internal thread. The outer diameter of the limiting sectionis matched with the aperture of the portion, at the boss, of the sealing hole. At least three limiting grooves are uniformly distributed in the peripheral surface of the limiting section. The limitinggrooves are matched with the unidirectional rotating limiting device and can limit the sealing cover so that the sealing cover can only rotate unidirectionally. Through cooperation of the limiting grooves and the unidirectional rotating limiting device, the sealing cover is self-locked. The sealing cover cannot be tightened in the forward direction and cannot be screwed out in the reverse direction. The phenomenon that the sealing cover is located in a vibration environment for a long time and is likely to get loose and fall off can be effectively avoided.

Description

technical field [0001] The invention relates to the field of mechanical seals, in particular to a mechanical seal structure. Background technique [0002] At present, many sealing caps are sealed with ports to be sealed through threaded connections. The sealing cover is designed with internal threads (or external threads), and the sealing port is designed with matching external threads (or internal threads). When sealing, the sealing cover can be screwed tightly on the sealing port through the cooperation relationship between the internal and external threads, and the sealing can be realized. [0003] These seals are tightened by forward rotation of the seal cap and unscrewed by reverse rotation of the seal cap. In some special environments or occasions, such as long-term vibration of the device, the long-term vibration will cause the originally tightened sealing cap to loosen, causing the sealing cap to loosen due to vibration. [0004] Therefore, it is necessary to desi...

AI Technical Summary

Problems solved by technology

In some special environments or occasions, such as long-term vibration of the device, the long-term vibration will cause the already tightened sealing cap to loosen, causing the sealing cap to loosen due to vibration

[0004] Therefore, it is necessary to design a sealing structure with self-locking function. Under normal circumstances, the sealing cover can only be screwed forward and cannot be screwed out in the reverse direction.

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