Variable-damping vibration attenuation and noise reduction device for valve
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A technology of vibration reduction, noise reduction and variable damping, which is applied to valve devices, devices for absorbing fluid energy of valves, shock absorbers, etc. It can solve problems such as difficult design, lower fluid speed, and short service life, and achieve the installation position Flexible space, reduced vibration and noise, easy loading and unloading and installation
Active Publication Date: 2016-03-30
BEIJING UNIV OF CHEM TECH
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[0005] There are many reasons for the vibration and noise of valves. The existing vibration and noise reduction methods are often only effective for certain vibration and noise. The injection noise downstream of the valve is ineffective; multi-stage decompression can reduce the fluid velocity in the valve, reduce the vortex in the valve cavity, and improve the coupling vibration and noise betwe
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0031] The invention is a variable damping vibration reduction and noise reduction device for valves, which monitors the valve vibration in real time, continuously and actively adjusts the damping force of the magneto-rheological fluid damper on-line, and realizes the stable working condition, variable working condition and valve operation of the valve in the pipeline system. Vibration and noise control under variable opening. figure 1 It is a typical structural diagram of the variable damping vibration reduction and noise reduction device installed on the threaded valve stem. The device is driven by the control system of the variable damping vibration reduction and noise reduction device. The device mainly includes a vibration transmission clamp and a magneto-rheological fluid damper; the vibration transmission clamp is composed of a threaded bushing 9, a ro...
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Abstract
The invention discloses a variable-damping vibration attenuation and noise reduction device for a valve and belongs to the field of vibration control. The combined variable-damping vibration attenuation and noise reduction device comprises a vibration transmission clamp, a magnetorheological fluid damper and a vibration collection analysis and control system. According to the device, the vibration transmission clamp mounted on a valve rod is used for transmitting vibration to the magnetorheological fluid damper to drive a movable shearing sheet to do shearing motion in magnetorheological fluid and to produce the damping force to offset the vibration energy of the valve; the vibration collection analysis and control system is used for monitoring the change of vibration parameters of the valve in real time, and adjusting the magnitude of the damping force of the damper according to the vibration parameters and in combination with the size and type of the valve and the structural parameters of the damper, so the active closed-loop control of the valve system vibration is realized. The combined variable-damping vibration attenuation and noise reduction device has the advantages that the vibration of different valves by different reasons can be effectively reduced, and the vibration and noise control of the valve under variable working conditions and opening degrees is realized.
Description
technical field [0001] The invention is a variable damping vibration reduction and noise reduction device applied to valves, which is mainly used to control the vibration and noise of various valves in the pipeline system, including ball valves, gate valves, butterfly valves, stop valves and control valves, etc., belonging to vibration control technology field. technical background [0002] In recent years, with the rapid development of petrochemical, metallurgy, electric power, shipbuilding, aerospace and other industries, large-scale and integration have become the development trend, making the safety and stability of the pressure piping system more and more the focus of attention. The medium conveyed in the pressure piping system is often flammable, explosive, toxic, high temperature, high pressure, etc., which are highly dangerous. Once a little careless, it may cause leakage, explosion, combustion, poisoning, environmental pollution, etc. in the pressure piping. ACCIDE...
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