Novel active dynamic pressure-type air film end face sealing device and intelligent control method therefor
An end face sealing and active technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of sealing failure, inability to realize self-adaptive and real-time control, and influence of sealing performance, so as to prevent sealing surface wear and reduce Risk of seal failure, effect of maintaining stable operation
Active Publication Date: 2021-02-02
CHINA JILIANG UNIV
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Problems solved by technology
[0004] At present, there are relatively mature technologies for the detection of sealing parameters of mechanical sealing systems in China, but due to the limitation of backward control equipment, most of the control of the sealing system needs to be carried out manually, and self-adaption and real-time control cannot be realized. Therefore, the film thickness Real-time changes will have a great impact on the sealing performance, causing the seal to fail
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[0033] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the schematic embodiments and descriptions are only used to explain the present invention, but not as improper limitations to the present invention.
[0034] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0035] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used ...
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The invention discloses a novel active dynamic pressure-type air film end face sealing device and an intelligent control method therefor. The device comprises an air film end face sealing device and an external monitoring and control system. The air film end face sealing device comprises a moving ring, a static ring, a magnetically controlled shape memory alloy, a pneumatic control spring, magnetexciting coils, a dynamic pressure groove and a static ring base. The external monitoring and control system comprises a flow meter, an air pressure regulating valve, an air source, a voltage regulator, a power supply and a controller. The intelligent control method comprises the steps: the flow meter transmits the real-time leakage rate to the controller, and the closing force regulating amount can be obtained according to a difference value between the real-time leakage rate and the target leakage rate; the air pressure regulating valve and the voltage controller are controlled through the controller; the stiffness of the pneumatic control spring and the spring compression amount are changed; and finally self-adaptive control over the closing force is achieved. The device is simple in structure, small in size, and high in regulation and control speed, is suitable for occasions with variable working conditions and high-parameter working conditions, and is capable of maintaining stableoperation of sealing and reducing the risk of a sealing failure.
Description
technical field [0001] The invention relates to the field of shaft sealing, in particular to a novel active dynamic pressure type gas film end face sealing device and an intelligent control method thereof. Background technique [0002] The dry gas seal is a non-contact end face seal with gas as the sealing medium. Through the gas dynamic pressure effect, a layer of micron-sized gas film is formed between the dynamic and static rings to realize non-contact operation. With its low leakage and long life The advantages of life and less wear are widely used in shaft end seals of various rotating machines, such as centrifugal compressors. [0003] Because the mechanical seal is inevitably subjected to shaft vibration during operation, especially with the development of mechanical equipment to ultra-high speed, the vibration of the shaft is more severe, and the mechanical seal will inevitably experience seal failure, resulting in media leakage and severe wear. Problems not only ca...
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Login to View More IPC IPC(8): F16J15/34F16J15/40
CPCF16J15/34F16J15/3444F16J15/3492F16J15/40
Inventor 陈源商浩李孝禄王冰清彭旭东李雨诗
Owner CHINA JILIANG UNIV