CN106337973A - Self-induction Magneto-rheological Damping Pipe Clamp - Google Patents

Abstract

The invention discloses a self-induction magneto-rheological damping pipe clamp, which comprises a fixed top cover, upper and lower pipe clamps, a damping rubber sleeve, a miniature energy conversion unit, and a fixed bottom plate. The rubber cavity of the vibration-damping rubber sleeve is filled with magnetorheological fluid material. The micro energy conversion unit sets the metal coil in the vibration-damping rubber sleeve and winds it on the outside of the magnetorheological fluid material. The two ends of the coil are connected to the MEMS The vibrating micro-energy device is electrically connected, and when the pipeline vibrates, the MEMS vibrating micro-energy device absorbs the vibration energy of the pipeline and converts it into electrical energy, so that a magnetic field is generated after the coil is energized, and the magnetorheological fluid material is solidified under the action of the magnetic field, and the curing degree It increases with the strength of the magnetic field, thereby changing the rigidity of the damping rubber sleeve, increasing the clamping degree of the pipeline, and finally reducing the vibration of the pipeline. The invention can realize the vibration reduction and vibration absorption of the pipeline, can self-adjust the rigidity and clamping degree of the pipe clamp according to the vibration degree of the pipeline, and can realize the absorption and reuse of vibration energy.

Description

A self-induction magneto-rheological damping tube clamp

technical field

The invention belongs to the field of mechanical engineering and relates to the fixing and vibration reduction of pipelines, in particular to a self-induction magneto-rheological vibration damping pipe clamp, which is especially suitable for fixing and vibration reduction of aviation hydraulic pipelines.

Background technique

Pipe clamps are an indispensable component for pipe fixing and connection. It is necessary to ensure sufficient connection strength and ensure the tightness of pipe connections. The vibration effect of the existing pipe clamp is poor, and strong vibration will damage the pipeline or even cause it to break, thereby affecting the safety of the entire system.

The rapid development of modern aerospace drives the development of aircraft towards large-scale and high-speed. The number of aviation pipelines of a single aircraft has also increased significantly, the aircraft pipeline system is more complex, and the space limitations are large. Coupled with the continuous increase of flight speed, the vibration and deformation of the airframe have reached an unprecedented level, which has great impact on The fixing and vibration reduction of aircraft piping system put forward higher requirements. Since ordinary pipe clamps generally only have the function of installing and fixing the pipeline, it cannot reduce the vibration of the pipeline and the impact caused by the vibration in the case of pipeline vibration. In severe cases, it may cause damage to the pipeline and lead to accidents. According to statistics, more than 90% of structural failures of aircraft engines are caused by or related to vibration. The use of traditional aviation pipe clamps may be able to meet the requirements of pipeline fixing, but the vibration reduction effect is not ideal, and the working life is short and the efficiency is low. At the same time, the energy of pipeline vibration cannot be used reasonably, resulting in waste. Therefore, the vibration reduction of the pipeline is an important issue that must be considered in aviation.

The Chinese invention patent application with the publication number CN102996905A discloses a double-hole pipe clamp, which contains anti-slip depressions and pipeline support ribs in the upper and lower pipe clamp parts, and forms a sound-absorbing cavity between adjacent support ribs. Reduced vibration and noise of pipe clamps. However, it does not substantially weaken the pipeline vibration, and the pipeline vibration still affects the safety of the system.

The Chinese invention patent with the notification number CN103104646B discloses a clamp-type damper for controlling the multi-dimensional vibration of a tubular structure. Axial and circumferential damping springs, rubber damping rings and anti-collision pads are respectively arranged outside the tubular structure, which can reduce the The axial and circular vibrations of the tubular structure, but the structure is complex, and it is inconvenient to install and fix the pipeline, which cannot guarantee the stability of the system. Damage to the road system, resulting in safety accidents.

Contents of the invention

In view of the above existing problems, the present invention aims to provide a self-induction magneto-rheological damping pipe clip, which not only has the functions of pipe fixing and vibration reduction, ensures the life and reliability of the pipe, but also makes full use of the pipe The energy of road vibration can ensure the safety of aircraft hydraulic system.

The technical solution adopted by the present invention to solve the technical problem is: a self-induction magneto-rheological damping tube clamp, which is characterized in that it includes a fixed top cover, an upper tube clamp, a vibration-damping rubber sleeve, a miniature energy conversion unit, a lower pipe clamp, fixed bottom plate; the damping rubber sleeve includes a rubber sleeve and a magneto-rheological fluid material filled in the inner cavity of the rubber sleeve, and the miniature energy conversion unit includes a metal coil and a MEMS vibrating micro-energy device, The metal coil is set in the vibration-damping rubber sleeve and wound on the outside of the magneto-rheological fluid material, the MEMS vibrating micro-energy device is attached to the pipeline, the vibration-damping rubber sleeve is wrapped on the pipeline, and the metal The joints at both ends of the coil are electrically connected to the MEMS vibrating micro-energy device. The upper and lower tube clamps are fastened on the vibration-damping rubber sleeve. The fixed top cover and fixed bottom plate connect the upper and lower The pipe clamp is fixed; when the pipeline vibrates, the MEMS vibrating micro-energy device absorbs the vibration energy of the pipeline and converts it into electrical energy, so that the metal coil generates a magnetic field after being energized, and the magnetorheological fluid material is generated under the action of the magnetic field. Curing, and the degree of curing increases with the strength of the magnetic field, thereby changing the rigidity of the damping rubber sleeve, increasing the clamping degree of the pipeline, and finally reducing the vibration of the pipeline.

The magnetorheological fluid material used in the present invention is a suspension composed of tiny soft magnetic particles with high magnetic permeability and low magnetic hysteresis and a non-magnetic liquid. It exhibits low-viscosity Newtonian Fluid properties; under the action of a strong magnetic field, it presents the characteristics of high viscosity and low fluidity Bingham body (Bingham body), and its rheology under the action of a magnetic field is instantaneous and reversible, and the shear after rheology The shear yield strength has a stable corresponding relationship with the magnetic field strength. The rubber sleeve of the present invention can already play a damping role, and the rubber sleeve is sufficient to reduce the vibration of the pipeline when the vibration of the pipeline is small. When the pipeline vibrates severely and the amplitude is large, the magnetorheological fluid material inside the rubber sleeve will solidify under the action of the magnetic field, changing the elastic coefficient of the rubber sleeve, increasing its rigidity, and clamping the pipeline. The degree is higher, and then the pipeline vibration is weakened, and the greater the vibration, the greater the vibration damping strength, ensuring its stability, and at the same time making full use of the energy of pipeline vibration to ensure the safety of the aircraft hydraulic system.

The present invention can realize the following functions: ensure the installation and position of the pipeline, have sufficient connection strength and tightness of the pipeline connection, etc., and can automatically adjust the stiffness of the vibration-damping rubber sleeve according to the vibration intensity of the pipeline to realize the pipeline The vibration reduction effect ensures the stability of the pipeline, improves the service life and reliability of the pipeline; the fastening bolts and supporting nuts for fixing the upper and lower pipe clamps can be selected and replaced according to the form and size of the connecting parts, and other components can also be replaced. Replacement is easy and convenient.

Compared with the existing aviation pipe clamp, the present invention has the following beneficial effects:

1. It can realize the vibration reduction of the pipeline, and can self-adjust the rigidity and clamping degree of the pipe clamp according to the degree of pipeline vibration, so as to ensure the stability and reliability of the pipeline.

2. It can make full use of energy. In the whole pipe clamp, the energy is converted from the mechanical energy of pipeline vibration into electrical energy, and then the electrical energy is converted into magnetic field energy. Then the elastic coefficient of the rubber sleeve can be changed by the magnetic field energy, which acts on the pipeline, and finally Reduce the vibration of the pipeline.

Description of drawings

Fig. 1 is the external structure drawing of the present invention.

Fig. 2 is a cross-sectional view of the structure of the present invention.

Figure 3(a) is the effect diagram of the damping rubber sleeve.

Figure 3(b) is a cross-sectional view of the structure of the damping rubber sleeve.

Figure 4(a) is the front view when the vibration-damping rubber sleeve is unfolded.

Figure 4(b) is a top view of the vibration-damping rubber sleeve when it is unfolded.

Figure 4(c) is the left side view when the vibration-damping rubber sleeve is unfolded.

Figure 4(d) is the right view when the vibration-damping rubber sleeve is unfolded.

Fig. 5 is an effect diagram of the micro energy conversion unit.

specific implementation plan

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 and 2, a self-induction magneto-rheological damping pipe clamp according to an embodiment of the present invention has a damping rubber sleeve 9 on the outside of the pipeline 1, and there is a magnetorheological fluid inside the damping rubber sleeve. Material 8 and metal coil 3, the two ends of the wire of this metal coil are connected to a MEMS vibrating micro-energy device 2 attached to the outer wall of the pipeline, the upper and lower tube clamps 4, 10 are buckled on the vibration-damping rubber sleeve, the upper 1. The lower pipe clamp is fixed by two pairs of hexagon socket bolts 6 and nuts 7 through the fixed top cover 5 and the fixed bottom plate 11. The upper and lower pipe clamps are equipped with anti-slip depressions (see Figure 2). This design can not only ensure the clamping degree, but also reduce the overall weight of the pipe clamp, and also play a role in absorbing pipeline vibration and noise.

As shown in FIG. 3 , there are magneto-rheological fluid materials 8 and metal coils 3 inside the vibration-damping rubber sleeve, and the two ends of the metal coils are connected to the MEMS vibrating micro-energy device 2 . When the metal coil is energized, a magnetic field will be generated in the middle of the metal coil, and under the action of a strong magnetic field, the magnetorheological fluid exhibits the Bingham liquid characteristics of high viscosity and low fluidity, and the solidification degree of the magnetorheological fluid varies with the magnetic field The strengthening of the rubber sleeve will change the rigidity of the rubber sleeve, increase the clamping degree of the pipeline, and finally reduce the vibration of the pipeline.

As shown in Figure 4, during the manufacturing process of the damping rubber sleeve 9, the magneto-rheological fluid material 8 is filled into the cavity inside it, and the metal coils 3 are arranged in the rubber sleeve and placed in the magneto-rheological fluid. On the outside of the material, the connection of the rubber sleeve is connected by a pinhole interface. When in use, roll up the rubber sleeve 9 and wrap it on the outside of the pipeline, and connect the pinhole ports A and B together, so that the magnetorheological fluid material will be wrapped on the outside of the pipeline, and the metal coil will also form a A closed coil loop encloses the magnetorheological fluid material and tubing.

As shown in FIG. 5 , the metal coil 3 is wound on the outside of the magneto-rheological fluid material and the pipeline, and both ends of the metal coil are connected to a MEMS vibrating micro-energy device 2 attached to the outer wall of the pipeline. Metal coils and MEMS vibration micro energy devices together form a micro energy conversion device. The MEMS vibrating micro-energy device can convert the vibration energy of the pipeline into electrical energy, and energize the coil to make the damping tube clamp play a role.

The invention not only can play the function of common pipe clamps to install and fix the pipelines, but also can achieve the vibration reduction effect, fully utilize the energy, and reasonably damp the vibrations of the pipelines. It is suitable for occasions with complex environments, frequent vibrations, and infrequent disassembly and assembly, and the stiffness of the damping rubber sleeve and the clamping degree of the pipeline can be adjusted in real time according to the vibration intensity of the pipeline to form a self-adjusting system. Protect the pipeline to the greatest extent and improve the safety of the aircraft pipeline system. At the same time, the self-induction magneto-rheological damping pipe clamp has a simple structure, low cost, and is easy to install. It does not require professional installation and protection. It can also be used for pipe fixing of pipe systems in other environments. It has a wide range of applications and is safe. High coefficient, strong reliability. Therefore, in the industrial field, it has broad application prospects.

Claims (3)

1. a kind of self-induction magneto-rheological vibration damping pipe clamp is it is characterised in that include fixed roof, upper pipe clamp, vibration isolation rubber sleeve, micro- Type energy conversion unit, lower tube clip, fixing base plate；Described vibration isolation rubber sleeve includes rubber bush and is filled in rubber bush Magnetorheological fluid materials in portion's cavity, described miniature energy converting unit includes wire coil and mems vibrates the energy device that declines Part, described wire coil is arranged in vibration isolation rubber sleeve and is wrapped in the outside of magnetorheological fluid materials, described mems oscillatory type Micro- energy device is attached on pipeline, and described vibration isolation rubber sleeve is wrapped on pipeline, and the two ends of described wire coil and mems shake The micro- energy device of dynamic formula electrically connects, and described upper, lower tube clip is combined on vibration isolation rubber sleeve, described fixed roof, fixing base plate By fastening bolt and matching nut, upper, lower tube folder is fixed；During pipeline vibration, described mems vibrates the energy device that declines and inhales The vibrational energy on closed tube road is simultaneously converted into electric energy, produces magnetic field, described magnetorheological fluid materials are in magnetic after making described wire coil energising Solidifying under field action, and state of cure strengthens with magnetic field intensity and strengthens, thus changing the rigidity of vibration isolation rubber sleeve, increasing Plus the clamping degree to pipeline, finally weaken the vibration of pipeline.

2. a kind of self-induction magneto-rheological vibration damping pipe clamp according to claim 1 is it is characterised in that described vibration isolation rubber sleeve Two connection ends adopt pin hole interface mode wiring so that described wire coil formed closed-loop path.

3. a kind of self-induction magneto-rheological vibration damping pipe clamp according to claim 1 and 2 is it is characterised in that described upper and lower pipe clamp Inside it is equipped with anti-slip recess.