A magnetic sealing system for centrifugal pumps suitable for high temperature, high pressure, and non-clean working conditions
A technology for magnetic seals and centrifugal pumps, which is applied to parts of pumping devices for elastic fluids, non-variable pumps, pumps, etc., can solve problems such as lack of improvement, achieve lower temperature, lower failure rate, and enhanced stability sexual effect
Active Publication Date: 2022-04-08
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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Problems solved by technology
However, for high temperature (150-350°C), high pressure (0.5Mpa-6 Mpa), non-clean (containing particles or easy-to-clean medium) working conditions (such as the slag pool circulating water pump used in the gasification unit in the coal-to-olefins industry, the medium Cartridge mechanical seals containing particle dross, high temperature and high pressure medium), lack of relevant improvements
Method used
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[0020] The following describes the present invention in detail, and the features and advantages of the present invention will become more clear and definite along with these descriptions.
[0021] The present invention provides a centrifugal pump magnetic sealing system suitable for high temperature, high pressure and unclean working conditions, such as figure 1 As shown, including stationary unit and rotating unit,
[0022] The static unit includes a pump cover 1, a mechanical seal gland 13 and a static ring 11, wherein the static ring 11 is embedded in the mechanical seal gland 13, and is fixed on the pump cover 1 through the mechanical seal gland 13, and the pump cover 1 is connected by threads fixed on the pump casing of the centrifugal pump by other means; the pump cover 1, the machine seal gland 13 and the rotating unit form a chamber A and a chamber C on both sides of the static ring 11 respectively, and the chamber A is close to the pump cover 1; A fourth permanent ma...
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The invention provides a centrifugal pump magnetic sealing system suitable for high temperature, high pressure and unclean working conditions, which includes a stationary unit and a rotating unit, and adopts the repulsive force of permanent magnetic materials as the pressing force of the moving ring and the static ring, which can provide relatively Large pressing force, suitable for high-pressure working conditions; secondly, a five-degree-of-freedom stable rotor system is formed by the radial force of at least two sets of radial permanent magnet rings to enhance the stability of the rotor during rotation; in addition, a seal flushing pipeline is set , so that only a small part of high-temperature and unclean medium will enter the sealing cavity, and reduce the temperature of the mechanical seal; finally, a cooling water cavity is set in the sealing gland, and the cooling water cycle is used to reduce the temperature of the mechanical seal and increase the service life. The magnetic sealing system in the present invention has a uniform pressing force and is insensitive to external factors such as vibration and yaw of the rotating shaft; according to the different permanent magnet materials, a smaller-sized permanent magnet can be selected to generate a larger pressing force, which is suitable for high pressure Working conditions, and the applicable speed range is wide, the speed can be from 1500rpm to 6000rpm.
Description
technical field [0001] The invention belongs to the technical field of centrifugal pump sealing, in particular to a centrifugal pump magnetic sealing system suitable for high temperature, high pressure and unclean working conditions. Background technique [0002] Mechanical seals are an indispensable and important part of power mechanical equipment. In petrochemical plants, most of the media are corrosive, flammable, explosive and toxic. Once the seal fails and the medium leaks, it will not only affect normal production, but may also cause a fire , explosion and other major accidents, which seriously endanger personal safety. According to literature statistics, the failure of centrifugal pumps caused by mechanical seal failure accounts for about 22% of the overall failure, and the maintenance cost accounts for about 26% of the overall maintenance cost. Therefore, it is necessary to optimize and improve the structure and form of the mechanical seal. [0003] At present, the ...
Claims
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IPC IPC(8): F04D29/12F04D29/02F04D29/58F04D29/70
CPCF04D29/126F04D29/026F04D29/708F04D29/586
Inventor 孟庆涛于海力郝晓林侯杰邓晶刘海丽齐彬彬李雪
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD