CN207437668U - Magnetic suspension low frequency vibration damping device - Google Patents

Abstract

The utility model discloses a magnetic levitation low-frequency shock absorber, which comprises a shock absorbing unit group installed between an upper base and a lower base, and each shock absorbing unit in the shock absorbing unit group includes a metal wire rubber sleeve and a The upper and lower iron core rods in the silk rubber sleeve are respectively provided with upper and lower energized coils, the upper end of the upper iron core rod is installed and connected with the upper bearing bearing on the upper base, and the lower iron core rod The lower end of the upper and lower iron core rods is installed and connected with the lower support bearing on the lower base. The opposite ends of the upper and lower iron core rods are respectively provided with upper and lower magnets, and the upper and lower iron core rods are provided with displacement sensors. The coil and the displacement sensor are respectively connected to the control adjustment system through the lead wire of the energized coil and the lead wire of the sensor. The utility model detects the displacement value of the iron core rod through the displacement sensor, feeds back the received displacement value to the control and adjustment system to adjust the current, and performs negative feedback adjustment to the magnetic force, thereby realizing the optimal regulation of the heavy-duty microwave vibration.

Description

Magnetic Suspension Low Frequency Shock Absorber

technical field

The utility model relates to vibration and noise control technology, in particular to a magnetic suspension low-frequency shock absorber.

Background technique

With the continuous development of the manufacturing process, it has been difficult to control the vibration problems of many manufacturing equipment, especially the low-frequency resonance problems caused by the mismatch of the inertia of the mechanical system.

Common types of shock absorbers include metal springs, rubber springs, air springs, oil-gas springs, hydraulic springs, and magnetorheological springs. Among them, rubber sleeves and air springs are the most commonly used for vibration reduction in China, but these vibration isolators do not have a good vibration isolation effect on the low-frequency vibration generated by the exciter in some cases.

Utility model content

Aiming at the deficiencies of the existing technology, the technical problem to be solved by the utility model is to propose a magnetically suspended low-frequency shock absorber which realizes the isolation and control of microwave vibration under heavy load and improves the low-frequency anti-vibration performance of the bearing mechanical structure.

The magnetic levitation low-frequency shock absorber that can solve the above-mentioned problems, its technical solution includes a group of shock-absorbing units installed between the upper and lower bases, the group of shock-absorbing units includes several shock-absorbing units, the difference is that each shock-absorbing The vibration unit includes a metal wire rubber sleeve and upper and lower iron core rods arranged in the metal wire rubber sleeve. The upper and lower iron core rods are respectively spirally wound with upper and lower energized coils, and the upper end of the upper iron core rod protrudes from the wire. The top of the rubber sleeve is connected to the upper load-bearing bearing at the corresponding position on the upper base, the lower end of the lower iron core rod extends out of the metal wire, and the bottom of the rubber sleeve is installed and connected with the lower supporting bearing at the corresponding position on the lower base. The upper end of the lower iron core rod is respectively provided with relative upper and lower magnets, and the upper iron core rod or the lower iron core rod is provided with a displacement sensor. The upper and lower energized coils are respectively connected to the control and adjustment system through the corresponding energized coil lead wires. The above-mentioned displacement sensor is connected to the control adjustment system through the sensor lead-out line.

Preferably, the upper and lower magnets are made of NdFeB material.

The displacement sensor is preferably an infrared sensor.

One optimization scheme is: the vertical symmetry planes of the upper and lower bases are used as the reference, and the left and right damping units at the symmetrical positions of the front, rear or left and right are inclined and symmetrical.

Another optimization scheme is: the vertical symmetry plane of the upper and lower bases is used as the reference, the left and right vibration damping units at the symmetrical positions of the front, rear or left and right are oblique and symmetrical, and the vibration damping units on the vertical symmetry plane Vertical setting.

In the above two optimization schemes, the left and right damping units are installed symmetrically and obliquely. By decomposing the load force, it can be seen that this installation method is equivalent in the vertical direction compared with the vertical placement, and the force in the horizontal position Since the symmetrical relationship can cancel each other out, but at this time, the load vibration impact force along the direction of the iron core rod has been greatly reduced compared with the vertical method, thus improving the vibration isolation efficiency and service life, and can also adapt to the XY plane The influence of the impact force in all directions avoids the defect that the original vertical mode can only accept the vibration impact in the vertical direction.

The beneficial effects of the utility model:

1. The magnetic suspension low-frequency shock absorber of this utility model overcomes the defect that the traditional rubber sensor has poor low-frequency control effect. With the help of magnetic force, the damping coefficient is increased, and the good vibration-absorbing characteristics of rubber are used to isolate the transmission of vibration; at the same time, the connection received by the sensor is used. The amplitude of the rod displacement signal is judged, and the current value of the excitation coil is adaptively adjusted in the control center to change the repulsion force of the magnet to realize the damping control of the vibration isolator.

2. The utility model overcomes the defect that the traditional shock absorber can only accept vibration isolation in the vertical direction, and the obliquely symmetrical installation of the symmetrical base reduces the impact value of axial vibration; at the same time, the symmetrical property can be used for load excitation in different directions Converted to axial component force, breaking through the limitation of traditional one-way vibration isolation.

3. The utility model has strong practicability, and is applicable to vibration-proof control of equipment in many fields of machinery, and the vibration-proof effect is ideal.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of a vibration damping unit in the present invention.

Fig. 2 is a schematic diagram of the installation of the damping unit in Fig. 1 .

FIG. 3 is a schematic diagram of the installation positions and directions of the damping unit groups in the present invention.

Drawing number identification: 1. Damping unit; 2. Metal wire rubber sleeve; 3. Upper iron core rod; 4. Lower iron core rod; 5. Upper energized coil; 6. Lower energized coil; 7. Upper bearing bearing; 8 1. Lower support bearing; 9. Upper magnet; 10. Lower magnet; 11. Displacement sensor; 12. Lead wire of energized coil; 13. Lead wire of sensor; 14. Upper base; 15. Lower base.

Detailed ways

The technical solution adopted by the utility model is to use the functional relationship between the magnetic force and the iron core rod inside the metal wire rubber sleeve 2 to change the magnitude of the excitation current through the control and adjustment system to realize the control of the magnetic force of the magnetic pole to control the shock absorber. The damping coefficient is adjusted by feedback to meet the control requirements for vibrations of different amplitudes and frequencies.

The technical solutions of the present utility model will be further described below in conjunction with the embodiments shown in the accompanying drawings.

The magnetic suspension low-frequency shock absorber of the present utility model includes a group of shock-absorbing units installed between the upper and lower bases 14 and 15, and the group of shock-absorbing units includes several shock-absorbing units 1 .

Each damping unit 1 includes a wire rubber sleeve 2, and the upper and lower iron core rods 3, 4 are coaxially arranged in the wire rubber sleeve 2, and the upper end of the upper iron core rod 3 is guided by the top of the wire rubber sleeve 2. The sleeve protrudes and is connected and installed with the upper load-bearing bearing 7 at the corresponding position on the bottom of the upper base 14, and the lower end of the lower iron core rod 4 protrudes through the guide sleeve at the bottom of the metal wire rubber sleeve 2 and is connected with the corresponding position on the top of the lower base 15. The lower supporting bearing 8 is connected and installed, and the opposite ends of the upper and lower iron core rods 3,4 in the wire rubber sleeve 2 are respectively flat upper and lower magnets 9,10 (made by neodymium iron boron material), and the wire rubber The upper and lower iron core rods 3 and 4 in the sleeve 2 are respectively spirally wound with upper and lower energized coils 5 and 6, and the upper and lower energized coils 5 and 6 are respectively connected to the control and adjustment system through their respective energized coil lead wires 12. An infrared displacement sensor 11 is provided on the iron core rod 4, and the displacement sensor 11 is connected to a control and adjustment system through a sensor lead wire 13, as shown in FIG. 1 .

Initially, due to the remanence effect of the upper and lower magnets 9 and 10, the upper and lower energized coils 5 and 6 are pre-passed with a certain value of reverse excitation current, so that the magnetic poles generate a certain repulsion force. When the vibration is transmitted from the base to the damping In unit 1, if the amplitude is relatively large, it will drive the lower iron core rod 4 and the lower magnet 10 to generate a certain displacement. At this time, the displacement sensor 11 will transmit the displacement value generated by the lower iron core rod 4 through the sensor lead-out line 13 in real time. To the control and adjustment system, the control and adjustment system will change the current value on the upper and lower energized coils 5 and 6 according to the displacement, so as to control the magnetic force to adjust the damping coefficient of the damping unit 1 accordingly, so as to realize the vibration of different frequency amplitudes. Self-adaptive adjustment to realize isolated control of microwave.

The installation method of each damping unit 1 is as follows:

1. Each vibration-damping unit 1 in the vibration-damping unit group is installed vertically between the upper and lower bases 14 , 15 .

2. Each damping unit 1 in the damping unit group is installed obliquely between the upper and lower bases 14 and 15. As shown in Figure 2, when the vibration is transmitted from the top, the resultant impact force F is decomposed into The component forces F1 and F2 in the direction of the iron core rod reduce the vibration impact value along the axis. When the vibration is transmitted from the bottom, the same impact resultant force is decomposed by the oblique iron core rod.

1. Based on the vertical symmetry planes of the upper and lower bases 14 and 15, the left and right vibration damping units 1 on the left and right symmetrical positions are inclined and symmetrical.

2. The vertical symmetry planes of the upper and lower bases 14, 15 are used as the reference, the left and right vibration damping units 1 on the left and right symmetrical positions are inclined and symmetrical, and the vibration damping units 1 on the vertical symmetry planes are vertically arranged.

specific:

①. On the vertically symmetrical surfaces of the upper and lower bases 14 and 15, a row of front and rear shock absorbing units 1 (seven pieces) are arranged, and seven equally spaced shock absorbing units 1 are arranged vertically.

②, the left and right first rows of the vertical symmetry planes of the upper and lower bases 14 and 15 are respectively provided with a row of damping units 1 (seven pieces) forward and backward, and each damping unit 1 in the left and right rows The vibration units 1 are correspondingly and symmetrically tilted, that is, the left row of seven equally spaced vibration damping units 1 is tilted upward to the left, and the right row of seven equidistantly spaced vibration damping units 1 is tilted upwardly to the right.

③, the left and right second rows of the vertical symmetry planes of the upper and lower bases 14 and 15 are respectively provided with a row of vibration damping units 1 (seven pieces) forward and backward, and each damping unit 1 in the left and right rows of vibration damping units 1 The vibration units 1 are correspondingly and symmetrically tilted, that is, the left row of seven equally spaced vibration damping units 1 is tilted upward to the right, and the right row of seven equidistantly spaced vibration damping units 1 is tilted upward to the left.

④, the left and right third rows of the upper and lower bases 14,15 vertical symmetry planes are respectively provided with a row of damping units 1 (five) in the front and rear directions, and each damping unit 1 in the left and right rows of damping units 1 The vibration units 1 are correspondingly and symmetrically tilted, that is, the five equally spaced vibration damping units 1 in the left row are tilted upward to the left, and the five equidistantly spaced vibration damping units 1 in the right row are tilted upward to the right, as shown in Figure 3 shown.

In the above two schemes 1 and 2, the vibration damping unit 1 in the vibration damping unit group is arranged obliquely and symmetrically according to the shape of the base, which can offset the component force of vibration impact in the horizontal direction, so that it can deal with multi-directional vibration impact and improve vibration absorption. Efficiency of vibration isolation.

Claims (5)

1. magnetic suspension low frequency vibration damping device, including the damper unit group being installed between upper and lower pedestal (15,16), the vibration damping Cell group includes several damper units (1), it is characterised in that：Each damper unit (1) includes wire rubber sleeve (2) and is arranged on Upper and lower iron core bar (3,4) in wire rubber sleeve (2) is respectively screw on upper and lower iron core bar (3,4) and is wound with upper and lower energization Coil (5,6), the upper end of upper core bar (3) stretch out at the top of wire rubber sleeve (2) on top base (15) correspondence position it is upper Wire rubber sleeve (2) bottom and bottom base (16) on pair are stretched out in load-bearing bearing (7) installation connection, the lower end of lower core bar (4) Answer the lower supporting bearing (8) of position that connection is installed, the lower end and the upper end of lower core bar (4) of upper core bar (3) are respectively equipped with phase To upper and lower magnet (9,10), upper core bar (3) or lower core bar (4) are equipped with displacement sensor (11), upper and lower live wire It encloses (5,6) and controlling and regulating system is connected by corresponding hot-wire coil lead-out wire (12) respectively, institute's displacement sensors (11) are logical Cross sensor lead-out wire (13) connection controlling and regulating system.

2. magnetic suspension low frequency vibration damping device according to claim 1, it is characterised in that：Upper and lower magnet (9,10) uses neodymium iron Boron material makes.

3. magnetic suspension low frequency vibration damping device according to claim 1, it is characterised in that：Institute's displacement sensors (11) are infrared Line sensor.

4. the magnetic suspension low frequency vibration damping device according to any one in claims 1 to 3, it is characterised in that：Above, bottom base On the basis of the vertical symmetry plane of (14,15), the left and right damper unit (1) in forward and backward or left and right each symmetric position is tilting and right Claim.

5. the magnetic suspension low frequency vibration damping device according to any one in claims 1 to 3, it is characterised in that：Above, bottom base On the basis of the vertical symmetry plane of (14,15), the left and right damper unit (1) in forward and backward or left and right each symmetric position is tilting and right Claim, the damper unit (1) in vertical symmetry plane is vertically arranged.