Pressure adaptive mechanical seal

A mechanical seal device and self-adaptive technology, applied in the direction of engine seal, mechanical equipment, engine components, etc., can solve problems such as seal failure, and achieve the effect of simple structure

Inactive Publication Date: 2011-12-14
BEIJING UNIV OF CHEM TECH
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  • Description
  • Claims
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Problems solved by technology

In engineering practice, after the first-level seal fails, if the second-level seal cannot withstand excessive pressure, the seal will fail
[0004] Based on

Method used

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  • Pressure adaptive mechanical seal
  • Pressure adaptive mechanical seal
  • Pressure adaptive mechanical seal

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[0025] The above-mentioned content of the present invention will be further described in detail below in conjunction with the specific implementation manners shown in the accompanying drawings. However, it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited only to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0026] like figure 1 As shown, a pressure adaptive mechanical seal device of the present invention includes a sealing dynamic ring assembly that rotates with the rotating shaft 14, and a sealing static ring assembly that is paired with the dynamic ring assembly. The structure of the sealing dynamic ring assembly is: the sealing dynamic ring 13 is installed on the dynamic ring sea...

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Abstract

The invention discloses a pressure self-adaptive mechanical seal device, which relates to the field of mechanical seal devices, and comprises a static ring assembly fixedly connected to the static part of the seal and a dynamic ring assembly that can rotate with the shaft. Discontinuous cavities uniformly distributed in the circumferential direction are processed on the radial side. There are through holes on the lower surface of each cavity. The through holes communicate with the low pressure area. The discontinuous cavities are sealed by sealing rings. According to different sealing conditions, the different The continuous cavity can adopt different structural forms to achieve the best sealing effect. This sealing device well solves the problem of seal end face wearing and tearing failure caused by sealing pressure fluctuations. Its notable feature is that it can adapt to sealing conditions with a wide pressure range. As the pressure of the sealed fluid increases, the bearing capacity of the seal will increase. The enhancement is adaptive.

Description

technical field [0001] The invention relates to the technical field of mechanical sealing devices, and is suitable for sealing devices of rotating shafts of fluid machines such as reactors and pumps, especially for end face sealing of rotating shafts of large vertical equipment. Background technique [0002] Whether the traditional mechanical seal is a contact seal or a non-contact seal, it is generally designed under certain working conditions. If the pressure of the sealed fluid increases, the seal will fail because it cannot withstand excessive pressure. However, in many occasions, the pressure that the seal can withstand is required to have a wide range. For example, the sealing system of the main pump of a nuclear power plant is composed of three different seals, which are arranged in a sealed housing. The first seal is the main seal. It is a hydrostatic pressure type, and under normal working conditions, the pressure can be reduced from 15.51MPa to 0.21MPa. The second...

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Application Information

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IPC IPC(8): F16J15/46F16J15/34
Inventor 李双喜张秋翔蔡纪宁张树强
Owner BEIJING UNIV OF CHEM TECH
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