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Pipeline active vibration reduction and isolation device based on piezoelectric stack drive and control system

A control system, piezoelectric stacking technology, applied in vibration suppression adjustment, pipe components, springs/shock absorbers, etc., can solve the problems of not being able to understand the pipeline operation status in real time, difficult to achieve vibration reduction and isolation effects, and high manufacturing costs , to achieve the effect of easy installation and maintenance, optimized pipeline layout, good vibration reduction and isolation effect

Inactive Publication Date: 2019-11-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing anti-vibration and isolation measures for various types of pipelines have complex structures and high manufacturing costs.

Method used

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  • Pipeline active vibration reduction and isolation device based on piezoelectric stack drive and control system
  • Pipeline active vibration reduction and isolation device based on piezoelectric stack drive and control system
  • Pipeline active vibration reduction and isolation device based on piezoelectric stack drive and control system

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Experimental program
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Effect test

Embodiment 1

[0028] see Figure 1-6 with Figure 8 , the present invention provides a technical solution: an active vibration reduction and isolation device and control system for pipelines driven by a piezoelectric stack, including a vibration reduction and isolation support, and the vibration reduction and isolation support is composed of an actuator casing 6, a pipeline Clip, movable push rod 3, high-strength spring 4, actuator 5 and sensor 7, the inner cavity of the actuator jacket 6 is provided with an actuator 5, and the upper side of the actuator 5 is provided with a high-strength spring 4. The high-strength spring 4 is arranged on the movable ejector rod 3 and between the movable ejector rod 3 and the actuator casing 6. The high-strength spring 4 is preloaded so that the movable ejector rod 3 and the actuator 5 are fully tightened to ensure the operation. Efficient transmission of power. Arranging the high-strength spring 4 can also make the vibration-reducing and isolating devic...

Embodiment 2

[0040] see Figure 7 , A construction method for a pipeline vibration reduction and isolation device. When the span of the pipeline structure is large, the vibration reduction and isolation support at only one point can only control the vibration of the pipeline at a certain point, but the overall control effect on the pipeline is poor, and it is difficult to achieve the required control effect. At this time, continuous Arrange multiple anti-vibration and isolation supports under the pipeline. When multiple vibration-reducing and isolating bearings are arranged in parallel, multiple sensors 7 input the motion state information of the pipeline at each position to the DSPACE device 8 through multiple channels, and the computer 9 compares the measured vibration state and the expected vibration-reducing state of each position to obtain the Position error input. By inputting the error signal into the MCS adaptive algorithm for calculation, the position control forces required to ...

Embodiment 3

[0042] A construction method for a pipeline vibration reduction and isolation device, the structure of which is similar to that of Embodiment 2, the difference is that when there is a corner in the pipeline, the vibration reduction and isolation support in one direction cannot control the vibration in multiple directions caused by the corner of the pipeline. Vibration-reducing and isolating supports can be arranged in two directions at the corner position of the pipeline. The sensors 7 of the vibration-reducing and isolating supports in both directions record the vibration state of the pipeline structure in two directions and transmit the state information to the control system. According to the control algorithm The calculated control force can effectively control the vibration of the pipeline structure in two directions.

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Abstract

The invention discloses a pipeline active vibration reduction and isolation device based on piezoelectric stack drive and a control system. The pipeline active vibration reduction and isolation devicebased on the piezoelectric stack drive comprises a vibration reduction and isolation support seat, wherein the vibration reduction and isolation support seat is composed of an actuator housing, a pipeline clip, a movable push rod, a high strength spring, an actuator and a sensor, the actuator is arranged in an inner cavity of the actuator housing, the high strength spring is arranged on the upperside of the actuator, the movable push rod is inserted into the high strength spring, a ball head of a free end of the actuator is abutted against a ball head of the movable push rod, the pipeline clip is arranged at the top of the actuator housing, and the vibration reduction and isolation support seat is electrically connected with the control system. The sensor outputs a signal to a DSPACE (digital space) device, and then the DSPACE device inputs the signal after being processed into a computer for operation. An MSC (multiplicative scatter correction) self-adaptive control algorithm is used for calculating out the magnitude of needed control force of all points according to the overall status of a pipeline structure, and the magnitude of the control force is output to a high voltage power source. The high voltage power source outputs voltage needed by the actuator according to a signal of the needed control force, and a voltage excitation signal acts on the actuator and generates actuation force so as to achieve the target vibration reduction and isolation control effect.

Description

technical field [0001] The invention relates to the technical field of pipeline vibration reduction and isolation devices, and the specific field is an active vibration reduction and isolation device and a control system for pipelines driven by piezoelectric stacks. Background technique [0002] The pipeline structure is widely used in electric power, petroleum, shipbuilding and other industries. When the liquid or gas flows in the pipeline, the pressure pulsation will be generated on the pipeline, which will cause the pipeline to vibrate. Pipeline vibration can easily cause wear and fatigue of the pipeline, affecting the service life of the pipeline structure; structural vibration can easily lead to damage to the joints of the pipeline, causing catastrophic accidents; pipeline vibration can cause damage to pipeline valves, make key components out of control, and cause system shutdown. [0003] Existing methods to reduce pipeline vibration mainly include: optimizing pipeline...

Claims

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Application Information

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IPC IPC(8): F16L55/035F16F15/00
CPCF16F15/002F16F15/007F16L55/035
Inventor 涂建维吴雨航高经纬
Owner WUHAN UNIV OF TECH
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