Monitorable shaft end sealing system and control method

A shaft end sealing and monitoring technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve problems such as safety accidents, shortened service life of mechanical seals, equipment shutdown, etc., to achieve safe and stable operation, improve sealing performance, Ensure long-term effects

Active Publication Date: 2018-07-31
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

However, liquid film seals generally can only operate stably at the design operating point. In the case of high parameters or variable operating conditions, the end film thickness may be too large, serious leakage may occur, or excessive end load may cause The severe wear of the sealing end face greatly shortens the service life of the mechanical seal; it may also cause problems such as environmental pollution, energy waste, equipment shutdown and even safety accidents, and the loss far exceeds the cost of the seal itself

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  • Monitorable shaft end sealing system and control method
  • Monitorable shaft end sealing system and control method
  • Monitorable shaft end sealing system and control method

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Embodiment Construction

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0056] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "inner", "upper", "lower", "left", "right" etc. is based on the positional relationship shown in the drawings, only It is for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only...

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Abstract

The invention provides a monitorable shaft end sealing system and a control method. The shaft end sealing system comprises a first-grade gap sealer and a second-grade contact sealer arranged in a serial connecting manner, a liquid auxiliary system and a control system; the first-grade gap sealer is a liquid film sealer; the liquid auxiliary system comprises an isolation cavity between the first-grade gap sealer and the second-grade contact sealer, and a conveying pipeline for conveying isolation liquid into the isolation cavity; and the control system comprises a first pressure adjusting device arranged on the conveying pipeline and capable of adjusting the pressure of the isolation liquid, a sensor for detecting the liquid film thickness of the first-grade gap sealer, and a main controller. Through arrangement of the first-grade gap sealer and the second-grade contact sealer in the serial connecting manner, the shaft end sealing tightness of fluid equipment is improved; and the control system is provided for guaranteeing maintenance of the liquid film thickness in a set numerical value range and guaranteeing operation of the first-grade gap sealer in an optimal working condition point always, so that safe and stable long-period operation of the shaft end sealing system is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of shaft end dynamic sealing of fluid conveying equipment, and in particular relates to a monitorable shaft end sealing system and a control method with the shaft end sealing system. Background technique [0002] Fluid conveying equipment such as pumps and compressors are widely used in petrochemical, metal smelting, papermaking and other industries. As society pays more and more attention to environmental protection, in order to realize the transportation of fluid, the fluid must have a certain pressure, and the leakage requirements for the shaft end seal of fluid transportation equipment are becoming more and more stringent. The American Society of Tribology and the Society of Lubrication Engineers have formulated some easy The guideline for the quantitative control of volatile matter emission requires the shaft end seal to develop from zero leakage to zero escape. At the same time, in order to extend the ...

Claims

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Application Information

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IPC IPC(8): F16J15/34F16J15/40
CPCF16J15/3492F16J15/406
Inventor 李勇凡李振涛郝木明任宝杰刘柯炜王赟磊徐鲁帅
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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