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Screw groove non-contact leak-less mechanical seal system for centrifugal pump

A technology of mechanical seals and mechanical seal devices, applied to mechanical equipment, pumps, pump components, etc., can solve problems such as sealing function failure and leakage

Inactive Publication Date: 2004-04-28
徐万福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to their inevitable leakage, friction and wear often lead to the failure of their sealing function (70% of pump shutdown maintenance is caused by seal failure), even if they are running normally, they consume a lot of energy (such as soft packing seal The power consumption is about 5% of the pump power)

Method used

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  • Screw groove non-contact leak-less mechanical seal system for centrifugal pump
  • Screw groove non-contact leak-less mechanical seal system for centrifugal pump
  • Screw groove non-contact leak-less mechanical seal system for centrifugal pump

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Embodiment Construction

[0015] The spiral groove non-contact non-leakage mechanical seal system for centrifugal pumps is composed of non-contact non-leakage mechanical seals, non-contact auxiliary shaft seals, buffer fluid support systems, pump shafts and pump bodies. The rotating ring 4 of the sealing device is installed on the rotating shaft 1 of the centrifugal pump, and the floating ring 5 of the mechanical sealing device of the spiral groove non-contact reverse flow pump is installed on the pump body 14 (see figure 1 ) to form a non-contact and leak-free mechanical seal system; the seal chamber 9 provides a buffer fluid with a pressure lower than the negative leakage of the pump working chamber 2 through the seal support system 8 (such as oil, water and other neutral media, which must be mixed with the pump process medium In addition, a screw pump cylindrical surface non-contact auxiliary seal is installed on the outside, the rotating part 6 is installed on the pump shaft 1, and the stationary pa...

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Abstract

The present invention relates to mechanical non-contact spiral groove sealing system for centrifugal pump. The sealing system is installed on the rotation shaft of centrifugal pump to form mechanical non-contact sealing system, and the sealing cavity provides the sealing system with buffering fluid with pressure lower than that in pump work cavity. Besides, externally non-contact cylindrical sealing is provided as auxiliary sealing. The non-contact sealing has no friction loss and no leakage, and makes centrifugal pump operate safely and reliably.

Description

Technical field: [0001] The invention relates to the technical field of mechanical seals, specifically the application of a spiral groove non-contact and leak-free mechanical seal system on the rotating shaft of centrifugal pumps (Pumps). Background technique: [0002] As the shaft seal of centrifugal pumps of fluid machinery, soft packing seals (Soft Packings), floating ring seals (Floating Ring Seals) and mechanical seals (Mechanical Seals) are usually used. In addition to their inevitable leakage, friction and wear often lead to the failure of their sealing function (70% of pump shutdown maintenance is caused by seal failure), even if they are running normally, they consume a lot of energy (such as soft packing seal The power consumption is about 5% of the pump power). At the end of the last century, a spiral groove non-contact end face mechanical seal appeared. Its end face structure consists of two parts: one is a set of spiral grooves (Spiral Groove), which is evenly ...

Claims

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Application Information

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IPC IPC(8): F04D29/12
Inventor 徐万福
Owner 徐万福
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