CN201714899U - Adaptive dual control magnetorheological damper - Google Patents

The utility model discloses an adaptive dual control magnetorheological damper which comprises a working cylinder, a piston with large and small holes at a core part, a piston rod and a built-in linear generator. Two sets of magnet exciting coils are wound at the middle part of the piston. When the piston rod drives the piston to move in the working cylinder, the piston drives a rotor of the built-in linear generator fixed at the bottom of the large hole of the piston to do linear movement in a stator to generate electric energy, the electric energy is transmitted to one set of the magnet exciting coils of the piston, and the piston of the adaptive dual control magnetorheological damper generates magnetic field to generate damping force. As the electric energy output by the built-in linear generator is directly proportional to the speed of movement of the piston in the working cylinder, the adaptive dual control magnetorheological damper can automatically adjust the size of the output damping force according to the movement speed of the piston. The adaptive dual control magnetorheological damper can also control the other set of the magnet exciting coils on the piston of the adaptive dual control magnetorheological damper.

Technical field

The utility model belongs to a kind of MR damper, is specifically related to a kind of adaptive double-control magneto-rheological damper.

Background technique

MR damper is a kind of intelligent vibration damping device, the size of its damping force can be carried out remote stepless by the control power supply and be regulated, therefore, common MR damper must be equipped with the control power supply and could realize MR damper is exported the purpose that damping force is regulated; People have developed permanent magnet type magnetic current variable damper in order to reduce MR damper again to the dependence of control power supply, although can not needing to control power supply, permanent magnet type magnetic current variable damper works alone, be difficult to adapt to different vibration damping occasions but the output performance of its damping force is single, for this reason, people have developed the MR damper that carries electricity generating device again, as Chinese patent application number number be: 200910103744.5 " a kind of self-powered MR damper " and application number number are: 200710034309.2 " self-power-supply magnetorheological intelligent vibration damping device ", although these the two kinds MR damper that carry electricity generating device can solve the power issue of MR damper, but they all have rotational motion mechanism and complex structure, and break down in case carry electricity generating device, this MR damper will lose damping function fully, therefore, to carry the reliability of MR damper of electricity generating device not high for this class.

Summary of the invention

At existing MR damper complicated in mechanical structure and the not high deficiency of reliability that carries electricity generating device, the utility model proposes a kind of adaptive double-control magneto-rheological damper, the advantage of adaptive double-control magneto-rheological damper is: the power supply that this damper only need utilize its built-in linear electric generator to provide just can make the damping force of its output adapt to the needs of outside vibration damping automatically, can utilize outside control power supply to come the damping force of its output is regulated again, therefore, the reliability of adaptive double-control magneto-rheological damper is higher, and adaptive double-control magneto-rheological damper adopts built-in linear electric generator that electric energy is provided, and does not have rotational motion mechanism thereby simple in structure.

The technical solution of the utility model is as follows:

A kind of adaptive double-control magneto-rheological damper, it comprises clutch release slave cylinder, piston, piston rod and built-in linear electric generator; The piston that the middle part is wound with two groups of field coils is contained in the clutch release slave cylinder, and field coil adds protective layer outward, and this protective layer flushes with the piston periphery wall, leaves the mobile gap of magnetic flow liquid between piston periphery wall and protective layer and the clutch release slave cylinder inner circle wall; There is the through hole that is interconnected at the center of piston rod and piston, and the central through bore of piston is big small structure, and the entrance part of piston macropore is provided with seal arrangement and bearing; One end of piston rod and an end of piston are fixed, and the other end of piston rod stretches out from clutch release slave cylinder one end by the seal arrangement and the bearing of clutch release slave cylinder end face; Be full of magnetic flow liquid in the clutch release slave cylinder.Also be provided with the external diameter built-in linear electric generator identical in the clutch release slave cylinder with the external diameter of piston rod, in the macropore that the seal arrangement and the bearing of one end of built-in linear electric generator urceolus by piston macropore entrance part stretches into piston, the other end of built-in linear electric generator urceolus is fixed on the bottom of clutch release slave cylinder, and the mover of built-in linear electric generator is fixed on the bottom of piston macropore.

The mover of built-in linear electric generator is bonding or connect or embed a cylindrical permanent magnet and form at an end of a cylindrical not magnetic conductive metal, and cylindrical permanent magnet axially is being divided into two magnetic poles; The stator of built-in linear electric generator by in the magnetic conductive metal cylinder axially on embed 2 groups of shapes, size, solenoid coil that the number of turn is identical constitutes, these 2 groups of coils adopt the series connection of coiling reversal connection in the same way; The external diameter of cylindrical permanent magnet is less than the internal diameter of stator cylinder shape coil and leave the free gap.The lighting outlet of one group of field coil at piston middle part leads to outside the clutch release slave cylinder by the piston rod center hole, and another group field coil at piston middle part is perfectly straight to be connect with coil on the built-in linear generating machine stator and be connected.

The mover of built-in linear electric generator also can by cylindrical metal axially on be wound with 2 groups of shapes, size, coil that the number of turn is identical constitutes, these 2 groups of coils adopt the series connection of coiling reversal connection in the same way; The stator of built-in linear electric generator then is to be embedded in the magnetic conductive metal urceolus by a cylindrical shape permanent magnet to constitute, and the cylindrical shape permanent magnet is divided into two magnetic poles in the axial direction; The internal diameter of cylindrical shape permanent magnet is greater than the external diameter of mover coil and leave the free gap.The lighting outlet of one group of field coil at piston middle part leads to outside the clutch release slave cylinder by the piston rod center hole, and another group field coil at piston middle part is perfectly straight to be connect with coil on the built-in linear electric generator mover and be connected.

The existing structure that is coil with built-in linear electric generator mover, implementation procedure of the present utility model is described: when piston rod promotion piston moves in clutch release slave cylinder, piston rod enter or the cylinder of deactivating in, built-in linear electric generator also enters or withdraws from the macropore of piston, because of the external diameter of piston rod identical with built-in linear electric generator, so the actual volume when piston moves in clutch release slave cylinder in the clutch release slave cylinder remains unchanged;

When piston rod promotion piston moves in clutch release slave cylinder, the mover that piston drives the built-in linear electric generator that is fixed on piston macropore bottom moves in stator, make 2 groups of coils being on the mover under different magnetic poles cutting magnetic line and produce induced potential in stator, because 2 groups of coils on the mover adopt the series connection of coiling reversal connection in the same way, so the induced potential of built-in linear electric generator output is the closing of 2 groups of coil-induced electromotive forces on the mover; Because of the output terminal of 2 groups of coils on the mover directly is connected with one group of field coil of piston, so this induced potential will make in one group of field coil of piston and produce induction current, this induction current generates an electromagnetic field piston; Again because the induced potential of built-in linear electric generator output is relevant with the speed of mover coil cutting magnetic line, that is: with built-in linear electric generator mover and stator between relative velocity relevant, so, piston is in clutch release slave cylinder during with a certain movement velocity, to make built-in linear electric generator produce a certain induced potential, this electromotive force is applied on one group of field coil of piston, to on piston external diameter and clutch release slave cylinder internal diameter gap, produce certain magnetic field, this magnetic field uprises the viscosity of the magnetic flow liquid in the gap, the damping force that the piston that moves in clutch release slave cylinder is subjected to becomes big, and the speed that this damping force can make piston move in clutch release slave cylinder again reduces; Therefore, when the speed that piston moves in clutch release slave cylinder is big more, the induced potential that built-in linear electric generator produces is high more, make the induction current of one group of field coil by piston big more, the magnetic intensity that piston is produced is high more, make the magnetic flow liquid viscosity in piston external diameter and the clutch release slave cylinder internal diameter gap high more, damping force suffered when piston is moved in clutch release slave cylinder is also big more, like this, the speed that piston moves in clutch release slave cylinder just reduces soon more, that is to say that damping force suffered when piston moves is directly proportional with the speed that piston moves in clutch release slave cylinder in clutch release slave cylinder, vice versa, that is: this damper can be adjusted the size of its output damping force automatically according to the movement velocity of piston, makes the damping force of adaptive double-control magneto-rheological damper output and the movement velocity of piston that certain adaptivity just arranged.When piston rod promotion piston was done acceleration or retarded motion in clutch release slave cylinder, situation was similar with it, and the adaptive double-control magneto-rheological damper function that built-in linear electric generator mover is cylindrical permanent magnet is also identical with it, all repeats no more herein.

Adopt external power supply identical with common MR damper to the control action of another group field coil on the adaptive double-control magneto-rheological damper piston, except the damping force that can make adaptive double-control magneto-rheological damper output obtains the wider adjusting, the adaptive double-control magneto-rheological damper functional reliability is greatly improved.Since two groups of field coils on the adaptive double-control magneto-rheological damper piston by two independently power supply control, therefore, compare with the existing MR damper that carries electricity generating device, adaptive double-control magneto-rheological damper of the present utility model has following advantage:

1, the damping force of adaptive double-control magneto-rheological damper output can adapt to the needs of outside vibration damping automatically.

2, the mechanical structure of adaptive double-control magneto-rheological damper reliability simple and work is higher.

3, two of adaptive double-control magneto-rheological damper groups of field coils respectively by two two independently power supply control, its control mode is more flexible.

Description of drawings

Fig. 1 is that the utility model mover is a kind of structural representation of coil.

Fig. 2 is built-in linear electric generator working principle schematic representation, and among Fig. 2, L1 and L2 are 2 groups of coils of mover (or stator), and E is the induced potential that coil is in operation and produces, V be built-in linear electric generator mover with stator between relative motion speed.

Fig. 3 is the generalized section of Fig. 1

Fig. 4 is that the utility model mover is a kind of structural representation of permanent magnet.

Embodiment

Describe structure of the present utility model in detail below in conjunction with accompanying drawing: