Inertial -type vibration exciter based on integration twin coil structure

Technical Field

The utility model relates to the technical field of mechanical vibration, in particular to a double-coil structure based on the integration of the inertia of the vibration isolator the type stirs up.

Background Art

Vibration exciter (abbreviated as vibration exciter, is also called actuator) is a transform electric energy into mechanical energy of the vibration exciting apparatus, under the drive of the input signal, in order to output power by energizing the target produce the desired vibration. As the technology advances, in scientific research, military, automobile, the fields of entertainment, as the vibration generating or demand controlled increasingly strongly, the application of the vibration exciter is also more and more widespread.

Transducer device according to the different, vibration exciter can be divided into electromagnetic, piezoelectric, magnetostrictive, hydraulic, or the like. Wherein the piezoelectric, magnetostriction vibration exciter own strength impedance is relatively large, allowing displacement is low, in general suitable for the high-frequency excitation; hydraulic vibration exciter need of additional external hydraulic system, the structure is complicated and allow displacement is low, but the force value is larger; and electromagnetic vibration exciter additional impedance is small, to allow displacement large, low-frequency excitation occasions demand the general selection.

According to the structure and mounting of the different ways of, vibration exciter can be divided into the ordinary vibration exciter and inertial vibration exciter. Ordinary vibration exciter general consists of a base and a force output end of the, mounting to the base and force the output end of a fixed, its mounting structure is complicated and the high precision requirements, additional impedance but strength output is very small, and the lower limit of the exciter relatively low working frequency, is generally applied to research precision testing occasions demand. With the ordinary vibration exciter different, inertia the type stirs upthe strength loses end of the vibration isolator does not exist, only the base is fixed and can work normally, so it is simple and easy to install, more extensive application, however, the lower limit of the ordinary working frequency higher than that of ordinary vibration exciter.

The growth of the application requirements of the exciter, the more the performance index of the high requirements. How does not increase the volume, the weight under the condition of the strength of the exciter current output capacity is the main purpose of the design of the exciter. Increasing the coil current is the most direct method, however, the coils heat power increase, the heat dissipation performance of the exciter by the requirements of the higher. At present, in most of the vibration exciter, through the glue between the coil and the outer shell, such as Bakelite spring not good heat conduction performance is connected with the material, and small contact area, heat generated by the coil is difficult to be effectively conducted to the housing, so that the coil under big current high-temperature heat generation is not apt to accumulate. There are also some vibration exciter through to the internal injection of cold air to reduce the temperature of the coil, however, the method requires complex auxiliary equipment, not utility. Therefore, how to improve the radiating performance of the effective vibration exciter, inhibit the temperature of the coil is the important issue of designing vibration exciter, can directly enhance its output capacity.

Content of the utility model

The purpose of the utility model is that, to solve the problems that the prior vibration exciter of poor heat dissipation performance, energy density is low, the disadvantages of complicated installation structure, provides a novel integrated double-coil structure of the inertial vibration exciter, the exciter the type stirs up using the inertia of the heat dissipation capacity can be improved, a long time is improved, the reliability of high power operation.

In order to achieve the above-mentioned purpose, the present utility model provides a double-coil structure based on the integration of inertial vibration exciter, with double coil and single-action magnet structure, is a moving-iron type vibration exciter, including: moving magnet, the housing, plate spring, the upper coil and the lower coil. The plate spring the ring plate-shaped elastic structure, used for the moving magnet support in the casing, braking and non-axial displacement of the magnet, the two ends of the movable magnet is provided on the ring-shaped tubular structure, causing the moving magnetic fields generated by the magnets, the pipe wall of the tubular structure along an annular form a loop, in each a ring on the outer end face of the tubular structure is provided with an annular hole, used for placing the coil, the ring of the ring-shaped hole with the outside of the tubular structure through the inner cavity, the upper coil, the coil and the outer shell is an integral structure, the upper coil and the lower coil of symmetrically arranged on the one end of the two ends of the outer shell, the other ends of which are symmetrically located in two annular hole, when the two reverse alternating current flows through the coils, the upper coil, lower coil and the moving magnet in the same direction is generated between the electromagnetic inoperative position, the moving magnet and the outer shell form produces a relative movement between the vibration excitation.

As a further improvement of the above-mentioned technical scheme, the moves the magnet including: iron core, the permanent magnet, the permanent magnet, the upper yoke, the lower yoke; said iron core is of a hollow tubular structure, the upper, and lower ends are arranged on the outer wall of an annular support, two annular support between a ring-shaped groove is arranged along the circumferential direction; the upper permanent magnet mounted in an annular support between the upper yoke, the upper end of the iron core, the permanent magnet and the yoke are combined to form a ring-shaped tubular structure; the permanent magnet is fixed to the other of an annular bracket between the lower yoke, the lower end of the iron core, the permanent magnet and the lower yoke iron combination to form another ring-shaped tubular structure.

As a further improvement of the above-mentioned technical scheme, the shell includes: an upper cover plate, the lower cover plate and casing, the upper cover plate and lower cover plate are respectively covered on the shell of the upper port and a lower port; the upper cover plate and lower cover plate are both provided with a central of an annular cylinder, are respectively used as the coil wound on the coil frame and the lower coil of the skeleton, the upper coil and the lower coil are respectively wound around the end of an annular cylinder.

As a further improvement of the above-mentioned technical scheme, an annular cylinder and the outer shell of the arc-shaped chamfer angle of the joint, an annular cylinder in order to increase the structure strength and heat dissipation function.

As a further improvement of the above-mentioned technical scheme, the upper end of the iron core with the outer walls of the upper yoke is arranged between a gap forming an annular hole, the outer wall of the lower end of the iron core is arranged between the lower yoke is formed another annular hole. At this moment the upper coil, are respectively positioned under the main body of the coil and the iron core of an upper yoke, the yoke and the core in the magnetic gap is formed.

As a further improvement of the above-mentioned technical scheme, the side in the number of two; the two flat springs are circular ring plate-shaped elastic structure, for supporting the weight of the moving magnet, the outer edge of one of the leaf spring is fixed between the upper cover plate and the casing, its inner edge is fixed to the upper yoke on the outer wall of, the outer edge of another leaf spring is used between the cover plate and the shell, its inner edge is fixed on the outer wall of the lower yoke. The upper cover plate and lower cover plate are arranged on the edge of the flange through which the two leaf spring is fixed on the shell.

As a further improvement of the above-mentioned technical scheme, the upper permanent magnet, polarized in the axial direction the upper and lower permanent magnets, and the use of the iron core and the yoke; and the, lower yoke iron is fixed, after installation on the core and the opposite side of the same polarity.

As a further improvement of the above-mentioned technical scheme, the iron core, the yoke, the use of the yoke forming the whole processing of the soft magnetic material.

As a further improvement of the above-mentioned technical scheme, the upper permanent magnet, the use of the upper and lower permanent magnets of permanent magnet material the whole processing into an annular structure, or the permanent magnet material processing into a plurality of fan-shaped structure, and assembling into a circular ring.

The utility model has the double-coil structure based on the integration of inertial vibration exciter has the advantages of:

The utility model inertial vibration exciter coil in the integrated design of the housing, the heat generated by the coil can be effectively conducted to the housing, the heating of coil the shell can be directly transferred to the outside, to greatly enhance the heat dissipation performance, improve its high-power, long-term working reliability of the; two ends of the movable magnet, the ring-shaped tubular structure, causing the moving magnetic fields generated by the magnets, the pipe wall of the tubular structure along an annular form a loop, this loop restrain the inside of most of the magnetic field, so as to greatly enhance the magnetic field within the ring-shaped hole, the stronger is the force of the generating coil, the double-coil structure, the same volume of the vibration exciter, has higher weight force output capacity, can inspire more strong vibration; at the same time, the inertial vibration exciter can work under at any mounting angle, improves the scope of application.

Description of drawings

Figure 1 is the section view of embodiment of a double-coil structure based on the integration of inertial of the exciter of the present utility model.

With photo identification:

1, moving magnet 2, housing 3, iron core

4, upper permanent magnet 5, the lower permanent magnet 6, the upper yoke

7, the lower yoke 8, the plate spring 9, the lower leaf spring

10, the upper cover plate 11, a lower cover plate 12, shell

13, the upper coil 14, lower coil 15, ring support

16, an annular cylinder 17, an annular hole 18, the annular groove

Mode of execution

The embodiment of Figures and combined to the present utility model has the advantages of a double-coil structure based on the integration of inertial vibration exciter for a detailed description of.

As shown in Figure 1, the utility model provides a double-coil structure based on the integration of inertial vibration exciter comprises: moving magnet 1, a shell 2, the upper leaf spring 8, the lower leaf spring 9, the upper coil 13, lower coil 14. next spring the on spring and 9 are in the shape of circular ring plate-shaped elastic structure, used for the moving magnet 1 is supported on the casing 2 the inner, and to the brake magnet 1 of the non-axial displacement, the movable magnet 1 is the two ends of the symmetric arrangement of the ring-shaped tubular structure, so that the moving magnet 1 along the ring of the magnetic field generated by the pipe wall of the tubular structure to form a loop, in each a ring on the outer end face of the tubular structure is provided with an annular hole 17, used for placing the coil, the annular hole 17 of the inner cavity of the ring-shaped tubular structure through the outside, the upper coil 13, lower coil 14 and the outer shell 2 are integrated structure, the upper coil 13 and next coil 14 are symmetrically arranged at one end of the casing 2 the two ends of the in, the other ends of which are symmetrically located in two annular hole 17 the inner, when the access-reverse alternating current, the upper coil 13, lower coil 14 and moves the magnet 1 in the same direction is generated between the electromagnetic inoperative position, moving the magnet 1 and the shell 2 relative movement generated between the vibration excitation. The upper coil 13, lower coil 14 by the reverse current, can adopt the cascade or in parallel can be driven by an external power amplifier.

Inertial vibration exciter based on the above-mentioned structure, as shown in Figure 1, in this embodiment, the movable magnet 1 including: iron core 3, upper permanent magnet 4, the upper and lower permanent magnets 5, the upper yoke 6, the lower yoke 7 ; the iron core 3 is a molded structure of the special rotating body, which comprises a central tubular structure and on the core, the lower end of the two arranged on the outer wall of the annular support 15 ; the upper permanent magnet 4, the lower permanent magnet 5 can be designed to a circular ring structure are, are respectively mounted on the above-mentioned two annular bracket 15 on; the upper yoke 6 and next yokes 7 for the special cyclic structure, are respectively installed on the permanent magnet 4 and the lower permanent magnet 5 on. In this embodiment, the movable magnet 1 can be made of iron core 3, upper permanent magnet 4, the upper and lower permanent magnets 5, the upper yoke 6, the lower yoke 7 and a combined bonding, so that the iron core 3 at the upper end, upper permanent magnet 4 and the upper yoke 6 are combined to form a ring-shaped tubular structure, the iron core 3 at the lower end, the lower permanent magnet 5 and next yokes 7 are combined to form another ring-shaped tubular structure, as moves the magnet 1 the provision of the magnetic field generated by the magnetic circuit the transmission medium. The upper permanent magnet 4, the upper and lower permanent magnets 5 opposite to the surface should have the same polarity, the opposite polarity, were originally two independent closed magnetic circuit will produce the coupling, the magnetic induction intensity of the coil are affected. Furthermore, the two annular bracket 15 can be provided along the circumferential direction between the annular groove 18, so that the two annular line-phase separation, in order to avoid two annular tubular mutual interference of the magnetic field in the structure. The iron core 3 with the outer walls of the upper of the upper end of the yoke 6 is arranged between a gap forming an annular hole 17, the iron core 3 and the outer wall of the lower end of the yoke 7 is provided with a gap forming between another annular hole 17, at this moment the upper coil 13, lower coil 14 are respectively located in the main body of an upper yoke 6 and the iron core 3 at the upper end, the lower yoke 7 and the core in the magnetic gap is formed at the lower end. In this embodiment, the upper permanent magnet 4, the lower permanent magnet 5 can utilize permanent magnetic material into a ring structure the whole processing of the, other embodiments, can also be divided into a plurality of fan-shaped part of the manufacturing process, and in installing the ring into a whole. The iron core, the yoke, the use of the yoke forming the whole processing of the soft magnetic material. The two poles of the permanent magnet are in contact with the soft magnetic material, so that the majority of the magnetic field produced by the restrain inside the loop of the soft magnetic material, so as to greatly enhance the magnetic field within the ring-shaped hole, the stronger is the force of the coil generates.

The housing 2 can include: the upper cover plate 10, the lower cover plate 11 and shell body 12 ; the upper cover plate 10, the lower cover plate 11 can be designed as a circular plate-like structure, the upper cover plate 10 and a lower cover plate 11 are respectively covered on the casing 12 of the upper port and a lower port, and the middle is provided with an annular cylinder 16 ; are respectively used as the coil wound on the coil frame and the lower coil of the skeleton, the ring-shaped cylinder 16 are symmetrically arranged on the cover plate 10 and a lower cover plate 11 the two ends of the inside, and with the upper cover plate 10, the lower cover plate 11 into a whole structure, the upper coil 13 and next coil 14 are respectively wound in the above-mentioned ring-shaped cylinder 16 end. The housing 2 of the part can be made of a light metal material, in order to further reduce the overall weight of the vibration exciter.

In this embodiment, the upper cover plate 10, the lower cover plate 11 are the use of magnesium-aluminum alloy material formed by integrated processing, its light weight, better heat conductivity. In other embodiments, the upper cover plate 10, the lower cover plate 11 can also use other material forming or the welding forming integrated processing, specific materials and processing mode according to the actual need of the determined weight and heat dissipation demand. The ring-shaped tube 16 and the outer shell 2 of the arc-shaped chamfer structure can be designed to, in order to increase an annular cylinder 16 the structure strength and heat dissipation function.

The on spring 8, the lower leaf spring 9 are circular ring plate-shaped elastic structure, on spring 8 is fixed in the upper outer edge of the cover plate 10 and the housing 12 between, its inner edge is affixed to the on yokes 6 on the outer wall of, the lower leaf spring 9 is fixed at the lower outer edge of the cover plate 11 and the shell 12 between, its inner edge is fixed at the lower yoke 7 on the outer wall of the, is used for supporting the moving magnet 1 the weight, at the same time, because on spring 8, the lower leaf spring 9 with an axial rigidity is low, the characteristic of high radial rigidity, can be greatly restrained moves the magnet 1 of the non-axial displacement, the work along the arbitrary angle can be of the exciter.

Furthermore, inertial vibration exciter by the flat spring and moves the magnet in a resonant frequency of the vibration system, only in this frequency in the band of the above, can be effective inertial vibration exciting force of the vibration. Therefore, in order to expand the working frequency band of the vibration exciter, the above-mentioned resonance frequency should be the lower, the better. However, the frequency is low, the spring is soft, under the action of gravity in the quality of the static displacement also. When the static displacement after more than a certain limit, not only the coil will jump out of the action range of the magnetic field, the leaf spring is also easy because the displacement of the damage is too large. Therefore, infinite reduce the inherent frequency is not possible, the minimum value thereof and can tolerate the maximum static displacement is correlated. Generally speaking, the greater the size of the whole of the exciter, the vibration between the movable magnet and the outer shell the greater the maximum amplitude of, the most that can be tolerated by the large static displacement is large, the lower the corresponding natural frequency. In this embodiment, the overall height of the design of the inertial vibration exciter 100 mm, moving magnet 1 relative to the housing 2 for the maximum amplitude of vibration of 5 mm, the moves the magnet 1 and on spring 8, the lower leaf spring 9 of a simple harmonic oscillator inherent frequency of 20Hz, at this time moves the magnet 1 the static displacement about 0.6 mm, with the above-mentioned parameter the type stirs up vibration isolator can meet the inertia of most audio application requirements. In other embodiments, the size of the inertial of the exciter can be expanded or shrunk, the maximum amplitude of vibration and can also be based on inherent frequency to increase or decrease the actual demand.

In other embodiments, the movable magnet 1 and its various components can also be square or other shape of the columnar structure, in this case, the upper coil 13, lower coil 14 and the upper leaf spring 8, the lower leaf spring 9 can also be provided with a corresponding shape. The housing 2 and its various components can also be square or other shape of the columnar structure, can also be the surface of the through hole, notch, sticking radiator and other ways to improve the radiating performance of the of the exciter.

The finally should be understood that, the above-mentioned embodiment in order to illustrate the technical solution of the utility model and non-limiting. Although reference to the embodiment of the detailed description of the utility model, the ordinary technical personnel in this field should be understood, to the technical solution of the utility model of the equivalent modification or replacement, will not break away from the technical scheme of the utility model the spirit and scope of, its should be covered in the utility model the right among range of requirements.