CN209839046U

CN209839046U - Energy feedback type damping self-control vibration damper

Info

Publication number: CN209839046U
Application number: CN201920445557.4U
Authority: CN
Inventors: 史文库; 江逸飞; 张曙光; 陈志勇
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2019-12-24
Anticipated expiration: 2029-04-03

Abstract

The utility model discloses a belong to the technical field of vibration damping and vibration isolation, in particular to an energy feedback type damping self-control vibration damping device, which comprises a piezoelectric energy feedback unit and an electromagnetic induction self-control unit, wherein the piezoelectric energy feedback unit comprises an upper hinged support assembly, a piston rod, a piezoelectric ceramic lamination and an upper spring seat, the top of the upper hinged support assembly is in interference fit connection with the piston rod, the bottom of the upper hinged support assembly is bonded with the piezoelectric ceramic lamination, the bottom of the piezoelectric ceramic lamination is bonded with the upper spring seat, the bottom of the upper spring seat is fixedly provided with a coil spring, the bottom of the inner wall of the coil spring is fixedly inserted with an oil storage cylinder barrel, the inner wall of the oil storage cylinder barrel is fixedly provided with a working cylinder barrel, the utility model adopts semi-active control, realizes the optimal damping characteristic by adjusting the magnetic field intensity, and can effectively isolate the transmission of vibration in a, meanwhile, the control of an external ECU is not needed, and the comprehensive effect of low cost is achieved.

Description

Energy feedback type damping self-control vibration damper

Technical Field

The utility model relates to a damping vibration isolation technical field specifically is an energy feedback formula damping is from control vibration damper.

Background

Vibration (vibration) refers to the reciprocating motion of an object around its equilibrium position or the variation of a physical quantity of the system back and forth around its average (or equilibrium value). Vibration is one of the most common phenomena in the nature, and widely exists in daily life or production practice, such as the vibration of a pendulum, the vibration of strings, the beating of the heart, the vibration of eardrums and vocal cords, and the like.

In the field of engineering, the vibration phenomena are more than ever, such as the vibrations of the locomotive, the vehicle itself, and the vibrations of the lines and bridges supporting it; vibration of a plant or a dam caused by operation of machine equipment or an earthquake; the pulsating pressure of wind makes the buildings such as transmission lines, chimneys, water towers, bridges and the like vibrate; vibration of a ship or an airplane during navigation, and the like.

The violent vibration can cause the damage of the structure or the machine parts; for precision instruments or machining, vibration will affect its sensitivity or accuracy; the vibrations consume energy and thus reduce the efficiency of the machine; vibrations and simultaneous noise worsen the working conditions; the vibrations of airplanes, vehicles, ships, etc. affect the physical health of passengers and even endanger safety, etc. Attempts should be made to eliminate or mitigate these unwanted vibrations. In recent years, with the increasing requirements of people on comfort and mechanical precision, the traditional suspension and passive vibration absorber is difficult to meet the requirements of customers on vibration reduction and vibration isolation.

Vibration damper among the prior art can not realize automatic control, and the effect of damping is relatively poor, and the vibration damper who often has now often needs plus ECU to control, has improved the cost greatly, and the action of the vibrations of shock absorber is great simultaneously, and the reliability is lower, secondly does not have the ability of presenting function, consequently needs a urgent need to develop one kind and presents the ability formula damping from control vibration damper.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a present ability formula damping from control vibration damper to solve and to realize automatic control, the effect of damping is relatively poor, and the vibration damper who often has often needs plus ECU to control, has improved the cost greatly, and the action of the vibrations of shock absorber is great simultaneously, the lower scheduling characteristic's of reliability problem.

In order to achieve the above object, the utility model provides a following technical scheme: an energy feedback type damping self-control vibration damper comprises a piezoelectric energy feedback unit and an electromagnetic induction self-control unit, wherein the piezoelectric energy feedback unit comprises an upper hinged support assembly, a piston rod, a piezoelectric ceramic lamination and an upper spring seat, the top of the upper hinged support assembly is connected with the piston rod in an interference fit manner, the bottom of the upper hinged support assembly is bonded with the piezoelectric ceramic lamination, the bottom of the piezoelectric ceramic lamination is bonded with the upper spring seat, the bottom of the upper spring seat is fixedly provided with a spiral spring, the bottom of the inner wall of the spiral spring is fixedly inserted with an oil storage cylinder barrel, the inner wall of the oil storage cylinder barrel is fixedly provided with a working cylinder barrel, the top of the working cylinder barrel is fixedly provided with a guider assembly, the bottom of the working cylinder barrel is fixedly provided with a bottom valve assembly, the piston rod penetrates through the top of the working cylinder barrel, and the middle part of the inner wall of the working cylinder barrel, the spiral channel type assembly comprises an adjusting gasket, a spiral piston, a control coil and a locking nut, the control coil is fixedly installed on the outer wall of the bottom end of the piston rod, the spiral piston is fixedly installed on the inner wall of the control coil, the spiral piston is fixedly installed at the bottom of the piston rod through the locking nut, the adjusting gasket is fixedly installed on the top of the spiral piston, an electromagnetic induction self-control unit is fixedly installed on the right side wall of the upper hinged support assembly, the electromagnetic induction self-control unit comprises a lower spring seat, a fixing bolt, a permanent magnet, an elastic washer, a permanent magnet fixing nut, a feedback coil, an external cylinder barrel, a control unit, an external cylinder barrel guider, a lead and a guide rod, the guide rod is inserted and connected in the vertical direction in the middle of the inner wall of the external cylinder barrel, and the external cylinder barrel guider is fixedly installed between the top of the external cylinder barrel, the feedback coil is fixedly installed at the bottom of the inner wall of the external cylinder barrel, the permanent magnet fixing nut, the elastic washer and the permanent magnet are sequentially installed in the middle of the guide rod from top to bottom, the bottom end of the guide rod is installed at the top of the lower spring seat through the fixing bolt, and the feedback coil and the control coil are both electrically connected with the control unit through wires.

Preferably, the outer wall of the piezoceramic stack is coated with an insulating layer.

Preferably, a piston assembly is fixedly mounted at the bottom end of the piston rod through the locking nut, the piston assembly is located on the inner wall of the working cylinder barrel, and the piston assembly is connected with the working cylinder barrel in a sliding fit mode.

Preferably, the outer wall of the external cylinder barrel is provided with an opening, and the wire is inserted into the opening.

Preferably, the piston rod reciprocates on the inner wall of the working cylinder, and the spiral spring stretches or compresses in a reciprocating manner along with the up-and-down movement of the piston rod.

Preferably, the inner hole of the piston rod is in transition fit connection with the piston rod, the dimensional tolerance of the piston rod fitting hole is H7/m6, and the roughness of the piston rod fitting surface is Ra1.6.

Preferably, a plurality of spiral-line-shaped inertia channels are milled on the outer surface of the spiral piston, and the interior of the spiral piston is hollow.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides an energy feedback type damping self-control vibration damper utilizes the control unit to realize semi-automatic control, the control unit controls the control coil and the feedback coil, the induced current sent by the feedback coil will also change, after the treatment such as rectification and pressure rise, the magnetic field intensity in the spiral inertia channel passing through the spiral piston changes with the induced current, the change of the magnetic field intensity affects the viscosity of the magnetic rheological fluid in the inertia channel, thereby the liquid resistance received by the spiral piston is changed to change the damping of the vibration damper, the magnetic field intensity sent by the control coil is reduced, thereby the viscosity of the magnetic rheological fluid flowing through the spiral piston inertia channel is reduced, the damping force generated by the vibration damper is reduced, the pressure on the piezoelectric ceramic lamination is reduced, the current generated by the piezoelectric effect is reduced, the current sent by the feedback coil is superposed after the reaction, the master control current is increased, the magnetic field intensity sent by the, therefore, the viscosity of the magnetorheological fluid flowing through the spiral inertia channel in the spiral piston is increased, the damping force generated by the shock absorber is increased, the passive self-control function of the shock absorber damping is realized, the control unit is fixedly arranged on the shock absorber device and is used for directly controlling, the cost is reduced, the reliability is improved, meanwhile, the control unit can be used for recovering and storing the vibration energy, and the economy of the applied occasion is improved.

Drawings

FIG. 1 is a front view of an energy-feedback damping self-controlling vibration damping device;

FIG. 2 is a cross-sectional view of a helical channel piston assembly;

FIG. 3 is an external view of the spiral channel piston;

FIG. 4 is a three-dimensional view of the profile of a spiral channel piston;

FIG. 5 is a view of the piezoelectric energy feedback device;

FIG. 6 is a cross-sectional view of an electromagnetic induction device;

FIG. 7 is a top view of a second alternative channel profile piston;

FIG. 8 is a top view of a third alternative channel profile piston;

FIG. 9 is a flowchart of a control strategy for implementing passive autonomous control of a damping device;

fig. 10 is a schematic diagram of coil current flow.

In the figure: the device comprises an upper hinged support assembly 1, a piston rod 2, a piezoelectric ceramic lamination 3, an upper spring seat 4, a spiral spring 5, a guider assembly 6, an adjusting gasket 7, a spiral piston 8, a control coil 9, a locking nut 10, a working cylinder 11, an oil storage cylinder 12, a bottom valve assembly 13, a lower spring seat 14, a fixing bolt 15, a permanent magnet 16, an elastic washer 17, a permanent magnet fixing nut 18, a feedback coil 19, an external cylinder 20, a control unit 21, an external cylinder guider 22, a lead 23, a guide rod 24, a piezoelectric energy-feedback unit 25, a spiral channel type assembly 26 and an electromagnetic induction self-control unit 27.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a technical scheme: an energy-feedback type damping self-control vibration damper is used for realizing semi-automatic control and improving safety and reliability, and please refer to fig. 1-6 and 8, and comprises a piezoelectric energy-feedback unit 25 and an electromagnetic induction self-control unit 27, wherein the piezoelectric energy-feedback unit 25 comprises an upper hinged support assembly 1, a piston rod 2, a piezoelectric ceramic lamination 3 and an upper spring seat 4, the top of the upper hinged support assembly 1 is connected with the piston rod 2 in an interference fit manner, an inner hole of the piston rod 2 is connected with the piston rod 2 in a transition fit manner, the matching surface of the piston rod 2 is processed by grinding, the matching hole of the piston rod 2 is finely bored, the dimensional tolerance of the matching hole of the piston rod 2 is H7/m6, the roughness of the matching surface of the piston rod 2 is Ra1.6, the piezoelectric ceramic lamination 3 is bonded at the bottom of the upper hinged support assembly 1, an insulating layer is coated on the outer wall of the piezoelectric ceramic, the bottom end of the piston rod 2 is clamped with a piston assembly through a lock nut 10, the piston assembly is positioned on the inner wall of the working cylinder 11, the piston assembly is connected with the working cylinder 11 in a sliding fit manner, the up-and-down movement of the oil storage cylinder 12 on the piston rod 2 is realized, the piston rod 2 reciprocates on the inner wall of the working cylinder 11, the coil spring 5 is stretched or compressed in a reciprocating manner along with the up-and-down movement of the piston rod 2, the vibration damping effect is realized by the coil spring 5, the bottom of the piezoelectric ceramic lamination 3 is adhered with the upper spring seat 4, the bottom of the upper spring seat 4 is adhered with the coil spring 5, the oil storage cylinder 12 is inserted at the bottom of the inner wall of the coil spring 5, the working cylinder 11 is integrally formed on the inner wall of the oil storage cylinder 12, the working cylinder 11 is made of 304 stainless steel, the 304 stainless steel, the magnetic leakage is prevented to maximally utilize a generated magnetic field, a guider assembly 6 is installed at the top of a working cylinder 11 through a bolt, a bottom valve assembly 13 is fixedly installed at the bottom of the working cylinder 11 through a bolt, a piston rod 2 is connected with the top of the working cylinder 11 in a penetrating manner, a spiral channel type assembly 26 is sleeved at the middle part of the inner wall of the working cylinder 11, an electromagnetic induction self-control unit 27 is welded on the right side wall of an upper hinged support assembly 1, a control coil 9 is electrically connected with the control unit 21 through a wire 23, the control unit 21 is an ECU, the control unit 21 is used for inducing and controlling the magnetic field intensity of the control coil 9, please refer to the figure 1 and figure 2, the spiral channel type assembly 26 comprises an adjusting gasket 7, a spiral piston 8, a control coil 9 and a locking nut 10, the outer wall of the bottom end of the piston rod 2 is screwed with the control coil 9, the inner wall of the control coil 9, the interior of the spiral piston 8 is hollow, the spiral piston 8 is fixedly installed at the bottom of the piston rod 2 through a lock nut 10, the top of the spiral piston 8 is clamped with an adjusting gasket 7, please refer to fig. 1 and 6, an electromagnetic induction self-control unit 27 comprises a lower spring seat 14, a fixing bolt 15, a permanent magnet 16, an elastic washer 17, a permanent magnet fixing nut 18, a feedback coil 19, an external cylinder 20, a control unit 21, an external cylinder guider 22, a lead 23 and a guide rod 24, an opening is formed in the outer wall of the external cylinder 20, the lead 23 is inserted into the opening, the lead 23 on the feedback coil 19 is electrically connected with the control unit 21 by inserting the lead 23 into the opening, the guide rod 24 is inserted in the middle of the inner wall of the external cylinder 20 in the up-down direction, the guide rod 24 is clamped between the top of the external cylinder 20 and the guide rod 24, the bottom of the inner, the middle part of the guide rod 24 is sequentially provided with a permanent magnet fixing nut 18, an elastic washer 17 and a permanent magnet 16 from top to bottom, the permanent magnet fixing nut 18 is used for clamping the permanent magnet 16 and the elastic washer 17 in the middle part of the guide rod 24, and the bottom end of the guide rod 24 is arranged at the top of the lower spring seat 14 through a fixing bolt 15.

In specific use, as needs the utility model discloses along with the change of 8 velocities of motion of helical piston in the in-process that uses, induced-current size that feedback coil 19 sent also will change, after handling such as the rectification steps up, the electric current size that acts on control coil 9 becomes positive correlation with 8 velocities of motion of helical piston, then passes helical piston 8 and goes up the change of magnetic field intensity thereupon in the spiral inertial channel, the change of magnetic field intensity influences the viscosity of magnetic current becomes liquid in the inertial channel, therefore change the liquid resistance that helical piston 8 receives and then change the shock absorber damping. In the compression stroke, because the pressure on the piezoelectric ceramic lamination 3 is increased, the current generated by the piezoelectric effect is increased, and after the current is reversely superposed with the current sent by the feedback coil 19, the total control current is reduced, the magnetic field intensity sent by the control coil 9 is reduced, so that the viscosity of the magnetorheological liquid flowing through the inertia channel of the spiral piston 8 is reduced, and the damping force generated by the shock absorber is reduced; in the extension stroke, the pressure on the piezoelectric ceramic lamination 3 is reduced, the current generated by the piezoelectric effect is reduced, and is superposed with the current sent by the feedback coil 19 after being reversed, so that the total control current is increased, the magnetic field intensity sent by the control coil 9 is increased, the viscosity of the magnetorheological liquid flowing through the spiral inertia channel in the spiral piston 8 is increased, and the damping force generated by the shock absorber is increased. The passive self-control function of the shock absorber damping is realized.

Fig. 2-4 show that the utility model discloses it is from the first embodiment of control vibration damper to present energy formula damping, and the difference with above-mentioned embodiment is that spiral channel formula assembly 26 adopts spiral inertia damping passageway, and the controllable inertia passageway length of this kind of structure is long and be the curve passageway, and the direction of motion is inconsistent with the liquid flow direction, and basic damping is great, and low frequency vibration isolation is effectual.

Fig. 7 shows the second embodiment of the present invention, different from the above embodiments, the spiral channel type assembly 26 adopts a square linear inertia damping channel, the length of the controllable inertia channel of the structure is short, and the linear channel is parallel to the axis of the piston, the passive damping is smaller than that of the first structure, and the middle frequency vibration isolation effect is better.

Fig. 2-4 show the third embodiment of the present invention, which is different from the above embodiments, in that the spiral channel assembly 26 adopts a dovetail linear inertia damping channel, and changes the arrangement of the axial ring coil into six sets of control coils 9 distributed along the radial circumference, and this structure has the characteristics of high magnetic flux rate of the inertia channel and high magnetic field utilization rate, the controllable range of damping is higher, but the basic passive damping is lower than the above structure, and is suitable for wide frequency band vibration isolation.

Referring to fig. 9, when the shock absorber works, the magnitude of the induced current generated by the feedback coil 19 changes with the change of the movement speed of the spiral piston 8, after the treatment of rectification, pressure increase and the like, the magnitude of the current acting on the control coil 9 is in positive correlation with the movement speed of the spiral piston 8, the magnetic field strength in the spiral inertial channel passing through the spiral piston 8 changes therewith, and the change of the magnetic field strength affects the viscosity of the magnetorheological fluid in the inertial channel, so as to change the fluid resistance borne by the piston, thereby realizing the damping force self-control of the shock absorber, in the compression stroke, as the pressure on the piezoelectric ceramic lamination 3 increases, the current generated by the piezoelectric effect increases, and after the reversal, the current is superposed with the feedback coil 19, so that the total control current is reduced, the magnetic field strength generated by the control coil 9 is reduced, and the viscosity of the magnetorheological fluid flowing through the, the damping force generated by the shock absorber is reduced, in the extension stroke, the pressure on the piezoelectric ceramic lamination 3 is reduced, the current generated by the piezoelectric effect is reduced, the current is superposed with the current sent by the feedback coil 19 after the current is reversed, the total control current is increased, the magnetic field intensity sent by the control coil 9 is increased, the viscosity of the magnetorheological liquid flowing through the spiral inertia channel in the spiral piston 8 is increased, and the damping force generated by the shock absorber is increased.

Referring to fig. 10, the feedback coil 19 and the piezoelectric unit transmit signals to the control unit 21, and the control unit 21 controls the operation of the control coil 9 after data processing.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the description of such combinations is not exhaustive in the present specification only for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. An energy feedback type damping self-control vibration attenuation device is characterized in that: the piezoelectric energy feedback device comprises a piezoelectric energy feedback unit (25) and an electromagnetic induction self-control unit (27), wherein the piezoelectric energy feedback unit (25) comprises an upper hinged support assembly (1), a piston rod (2), a piezoelectric ceramic lamination (3) and an upper spring seat (4), the top of the upper hinged support assembly (1) is connected with the piston rod (2) in an interference fit manner, the bottom of the upper hinged support assembly (1) is bonded with the piezoelectric ceramic lamination (3), the bottom of the piezoelectric ceramic lamination (3) is bonded with the upper spring seat (4), the bottom of the upper spring seat (4) is fixedly provided with a spiral spring (5), the bottom of the inner wall of the spiral spring (5) is fixedly inserted with an oil storage cylinder barrel (12), the inner wall of the oil storage cylinder barrel (12) is fixedly provided with a working cylinder barrel (11), and the top of the working cylinder barrel (11) is fixedly provided with a guider assembly (6, the bottom of the working cylinder barrel (11) is fixedly provided with a bottom valve assembly (13), the piston rod (2) is connected with the top of the working cylinder barrel (11) in a penetrating manner, the middle of the inner wall of the working cylinder barrel (11) is fixedly provided with a spiral channel assembly (26), the spiral channel assembly (26) comprises an adjusting gasket (7), a spiral piston (8), a control coil (9) and a locking nut (10), the outer wall of the bottom end of the piston rod (2) is fixedly provided with the control coil (9), the inner wall of the control coil (9) is fixedly provided with the spiral piston (8), the spiral piston (8) is fixedly arranged at the bottom of the piston rod (2) through the locking nut (10), the top of the spiral piston (8) is fixedly provided with the adjusting gasket (7), the right side wall of the upper hinged support assembly (1) is fixedly provided with an electromagnetic induction self-control unit (27), the electromagnetic induction self-control unit (27) comprises a lower spring seat (14), a fixing bolt (15), a permanent magnet (16), an elastic washer (17), a permanent magnet fixing nut (18), a feedback coil (19), an external cylinder (20), a control unit (21), an external cylinder guider (22), a lead (23) and a guide rod (24), wherein the guide rod (24) penetrates through and is inserted in the middle of the inner wall of the external cylinder (20) in the vertical direction, the external cylinder guider (22) is fixedly installed between the top of the external cylinder (20) and the guide rod (24), the feedback coil (19) is fixedly installed at the bottom of the inner wall of the external cylinder (20), the permanent magnet fixing nut (18), the elastic washer (17) and the permanent magnet (16) are sequentially installed in the middle of the guide rod (24) from top to bottom, the bottom end of the guide rod (24) is installed at the top of the lower spring seat (14) through the fixing bolt (15), the feedback coil (19) and the control coil (9) are electrically connected with the control unit (21) through leads (23).

2. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: the outer wall of the piezoelectric ceramic lamination (3) is coated with an insulating layer.

3. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: the bottom end of the piston rod (2) is fixedly provided with a piston assembly through the locking nut (10), the piston assembly is positioned on the inner wall of the working cylinder barrel (11), and the piston assembly is connected with the working cylinder barrel (11) in a sliding fit manner.

4. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: the outer wall of the external cylinder barrel (20) is provided with an opening, and the wire (23) is inserted into the opening.

5. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: the piston rod (2) reciprocates on the inner wall of the working cylinder barrel (11), and the spiral spring (5) stretches or compresses in a reciprocating mode along with the up-and-down movement of the piston rod (2).

6. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: the inner hole of the piston rod (2) is in transition fit connection with the piston rod (2), the size tolerance of the fit hole of the piston rod (2) is H7/m6, and the roughness of the fit surface of the piston rod (2) is Ra1.6.

7. The energy feedback type damping self-controlling vibration damping device according to claim 1, wherein: a plurality of spiral linear inertia channels are milled on the outer surface of the spiral piston (8), and the interior of the spiral piston (8) is hollow.