WO2020056730A1

WO2020056730A1 - Active and passive integrated vibration isolator system

Info

Publication number: WO2020056730A1
Application number: PCT/CN2018/106978
Authority: WO
Inventors: 陈凡; 李东昱; 王国辉; 魏巍
Original assignee: 中科振声（苏州）电子科技有限公司
Priority date: 2018-09-17
Filing date: 2018-09-21
Publication date: 2020-03-26
Also published as: CN108999925A

Abstract

An active and passive integrated vibration isolator system, comprising a signal collection apparatus (18), a control apparatus, and a damping apparatus, the signal collection apparatus (18) collecting vibration signals of a mechanical device and conveying the signals to the control apparatus, and the control apparatus controlling the damping apparatus to implement damping on the basis of the signals; the damping apparatus comprises a housing, and a passive vibration isolator and an active vibration isolator (1) arranged in the housing and secured relative to the housing; and the passive vibration isolator and the active vibration isolator (1) are connected in series.

Description

Active and passive integrated vibration isolator system

Technical field

The invention relates to a vibration isolator system, in particular to an active-passive integrated vibration isolator system.

Background technique

In modern industry and the transportation industry, the vibration of mechanical equipment often adversely affects the accuracy, stability, safety, comfort, and service life of the entire system. For example, in the automotive field, reducing the transmission of the engine to the frame Vibration can effectively improve the car's riding comfort and the reliability of mechanical systems; in the field of military ships, isolating the vibration of small and medium-sized equipment (such as compressors) can improve the concealment of military ships and reduce the detected Possibility; In the field of aerospace, isolating bad working conditions such as the impact of severe vibration on precision instruments can improve system operation reliability, etc. With the development of modern machinery towards higher precision and higher reliability requirements, the suppression of mechanical vibration is becoming more and more necessary. According to different suppression methods, vibration control technology can be divided into vibration damping, vibration isolation, vibration absorption, and vibration damping. And dynamic design. Among these five vibration control technologies, vibration isolation is the most widely used.

The vibration isolation device is a device that isolates the vibration influence between the mechanical equipment and the foundation platform. Generally, the power equipment and its mounting members are supported on the base platform through a vibration isolation device. The vibration isolation device is a key component that determines the vibration isolation performance of the vibration isolation device.

Chinese patent with the application number of 201610534518.2, applied on July 7, 2016, is a type of driven disk with inertial channel and an upper and lower liquid cavity connected to an actuator, which is proposed in an active control hydraulic suspension of an automobile powertrain. Structure, under high-frequency working conditions, the structure of the active control hydraulic suspension of the automobile power assembly cannot play a role in canceling vibration, and reducing the main power will lead to an increase in work in order to meet the need to cancel the excitation force. The output force of the actuator can only satisfy the function of the magnetostrictive actuator with too long longitudinal size, which makes the size of the entire device too large to meet the actual installation requirements and reduces the working efficiency of the entire system.

The Chinese patent active control engine hydraulic suspension with an application number of 201410031596.1 filed on January 23, 2014 proposed that the "main spring, upper liquid chamber, inertial channel and decoupling membrane, lower liquid chamber" of the traditional passive vibration isolator The "lower liquid chamber" in the structure is moved above the main spring, which is upside down from the upper and lower liquid chambers of the traditional passive isolator. The structure has the following problems: 1. The upper liquid chamber is formed by the vulcanization of the top film and the rubber main spring. This setting makes the upper liquid chamber compressed by the main spring when the main spring compresses the lower liquid chamber, and the pressure difference between the upper and lower liquid chambers becomes smaller. As a result, the flow through the inertial channel becomes smaller, which reduces the ability of the inertial channel to dissipate vibration energy. 2. The effective area of the structure decoupling membrane acting on the lower liquid chamber is equal to the effective area of the main spring acting on the lower liquid chamber, so that the actuator vibration force directly offsets the exciting force, and the actuator output force is required to increase. This results in increased system energy consumption, increased volume, and reduced efficiency.

Chinese Patent Application No. 201710317821.1 on May 18, 2017, with active control type external suspension of voice coil actuator, using "main spring, upper liquid chamber, inertial channel and decoupling membrane, lower liquid chamber" configuration The decoupling membrane is connected with the actuator, and the actuator generates the driving force to be applied to the decoupling membrane. The structure has the following problems: 1. The coil bracket and the lower baffle plate are sealed by oil in the lower chamber, that is, the sound There is relative sliding in the up-down direction between the coil support of the coil of the motor and the lower plate. When the suspension is subjected to a static load, the pressure of the upper and lower liquid chambers is large, and this structure cannot meet the sealing requirements under complicated working conditions when the car is running. This kind of design will make micro leakage in the liquid cavity serious during the working process, which will affect the reliability of the product. 2. The effective area of the decoupling membrane acting on the upper and lower liquid chambers is almost the same as the effective area of the main spring acting on the upper liquid chambers. This setting method will reduce the vibration isolation efficiency.

The above several design schemes have defects in sealing, vibration isolation effect and volume efficiency, which limit their practical applications. Therefore, it is of great significance to develop an active and passive hybrid vibration isolation device with high efficiency and small volume.

Summary of the Invention

The purpose of the present invention is to provide an active-passive integrated vibration isolator system, which is used to reduce the vibration of mechanical equipment and improve the accuracy, stability, safety, comfort and service life of mechanical equipment.

In order to solve the above technical problems, the technical solution of the present invention is:

An active and passive integrated vibration isolation device includes a signal acquisition device, a control device, and a vibration reduction device. The signal acquisition device collects vibration signals of mechanical equipment and transmits the signals to the control device. The control device controls the signals according to the signals. The vibration reduction device performs vibration reduction.

The vibration damping device includes a casing, a mutually connected passive vibration isolator and an active vibration isolator provided in the casing. The passive vibration isolator and the active vibration isolator are connected through a connection mechanism, and the connection mechanism adopts a shaft sleeve, the shaft sleeve is fixed on the active vibration isolator, and the passive vibration isolator is fixed on the shaft sleeve. on. The shaft sleeve is fixed on the active vibration isolator by a fixing bolt, and the passive vibration isolator is fixed on the shaft sleeve by a fixing screw.

The passive vibration isolator includes a rubber main spring and an inertia channel mechanism. The inertia channel mechanism includes an upper disk, a lower disk, a decoupling membrane, and a leather bowl. The rubber main spring, the upper disk, the lower disk, and the leather bowl are arranged in this order. The upper plate and the lower plate are arranged to form an inertia channel, and the decoupling film is provided between the upper plate and the lower plate. The fixing screw passes through the decoupling membrane and the leather bowl and is fixed on the shaft sleeve in order.

Preferably, the fixing screw passes through the central hole of the decoupling membrane and the central hole of the leather bowl in order to be fixed on the shaft sleeve.

Preferably, the upper surface of the decoupling membrane, the upper plate and the rubber main spring constitute an upper fluid chamber, the lower surface of the decoupling membrane, the lower plate and a leather bowl constitute a lower fluid chamber, and the inertia channel communicates with the upper fluid chamber And the lower liquid chamber.

Preferably, the active vibration isolator includes a coil wound in an iron core in the axial direction, a mover assembly embedded with a permanent magnet, a stator, and a reed connecting the mover assembly and the stator, and the shaft sleeve is sleeved on The mover assembly is on.

Preferably, the mover assembly includes a mover outer ring, a mover mandrel, and a mover flywheel connecting the two, and the sleeve is sleeved on the mover mandrel.

Preferably, the housing comprises an upper protective cover, a base connecting piece and a lower protective cover in order, and the outer edges of the rubber main spring, the upper plate, the lower plate and the cup are pressed and pressed into a whole by the edges of the base connecting pieces. The stator is pressed on the base connector through a lower protective cover, and the signal acquisition device is disposed on the base connector.

Preferably, a metal skeleton is embedded in the decoupling film to improve the rigidity of the decoupling film and to ensure that the effective area of the decoupling film to the upper and lower liquid chambers does not change greatly within the stroke range.

Preferably, a metal skeleton is embedded in the outer edge of the leather bowl and the edge of the central hole to ensure its tightness.

Compared with the prior art, the present invention has the following advantages: after the signal acquisition device collects the vibration signals of the mechanical equipment, the signals are transmitted to the control device, the control device judges the vibration frequency, and when the rubber main spring is excited by the low frequency When the force is applied, the active and passive integrated vibration isolation device works in passive mode, the passive vibration isolator works, the active vibration isolator does not work, and the pressure and volume of the upper and lower liquid chambers of the passive vibration isolator cause the liquid to be in the inertia channel. Flow, the inertial channel with a specific liquid volume and liquid resistance will consume part of the vibration energy, thereby inhibiting the transmission of vibration to the base. When the rubber main spring is subjected to medium and high frequency vibration force, the active and passive integrated vibration isolation device works in active mode, and the active vibration isolator is controlled by the control system to generate upward main power transmission to the decoupling membrane, which is amplified and transmitted to the upper fluid chamber Rubber main spring. The rubber main spring gives a downward reaction force to the base to cancel it out, thereby suppressing the transmission of vibration to the base. The effective area of the decoupling film of the integrated vibration isolator acting on the upper and lower liquid chambers is smaller than the effective area of the main spring acting on the upper liquid chamber. The main power generated by the active isolator is transmitted to the rubber main body through the upper liquid chamber. The spring force is amplified, and its reaction force is the main force applied to the base, and this force is also amplified. The main power applied to the base by the active vibration isolator is amplified in the working frequency band by the passive vibration isolator, and is offset by the force transmitted from the vibration source to the base, thereby improving the vibration isolation efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are for explanatory purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportions, and the like of each component in the figures are only schematic, and are used to help the understanding of the present invention, and do not specifically limit the shapes and proportions of each of the components of the present invention. A person skilled in the art can implement the present invention by selecting various possible shapes and proportional sizes according to the specific circumstances under the teaching of the present invention. In the drawings:

1 is a schematic structural diagram of an active-passive integrated vibration isolation device according to a specific embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an active vibration isolator according to a specific embodiment of the present invention.

Shown in the picture: 1-active vibration isolator, 2-rubber main spring, 3-upper plate, 4-upper plate, 5-decoupling membrane, 6-cup, 7-connector assembly, 8-up protection Cover, 9-lower protective cover, 10-base connector, 11-iron core, 12-coil, 13-permanent magnet, 14-mover assembly, 15-reed, 16-decoupling membrane metal skeleton, 17 -Leather bowl metal skeleton, 18-signal acquisition device, 20-mover outer ring, 21-mover mandrel, 22-mover flywheel, 23-shaft sleeve, 24-screw.

detailed description

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the protection scope of the present invention.

It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not meant to be the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

1 and FIG. 2, an active-passive integrated vibration isolation device includes a signal acquisition device 18, a control device, and a vibration reduction device. The signal acquisition device 18 collects vibration signals of a mechanical device and transmits the signals to the device. A control device that controls the vibration reduction device to perform vibration reduction according to a signal.

In this embodiment, the signal acquisition device 18 uses an acceleration sensor, and the acceleration sensor measures the vibration signal transmitted to the base as a control error signal. The control device uses an industrial computer, an on-board computer, a microcomputer, and an embedded computer. Digital signal processor (DSP) or editable logic device (FPGA), etc.

The vibration damping device includes a housing, a passive vibration isolator and an active vibration isolator 1 disposed in the housing and fixedly disposed relative to the housing. The passive vibration isolator and the active vibration isolator 1 are connected in series.

The passive vibration isolator and the active vibration isolator 1 are connected by a connecting member assembly 7, and the connecting member assembly 7 includes a shaft sleeve 23 which is fixed on the active vibration isolator 1. The passive vibration isolator is fixed on the shaft sleeve 23.

The housing includes an upper protective cover 8, a base connector 10, and a lower protective cover 9 connected in order. The base connector 10 includes a connection portion and a flange portion connected in sequence. The upper protective cover 8 is connected to a housing. The flange portion is fixed with screws, and the signal acquisition device 18 is disposed on the flange portion.

The passive vibration isolator includes a rubber main spring 2 and an inertia channel mechanism. The inertia channel mechanism includes an upper disk 3, a lower disk 4, a decoupling membrane 5, and a leather bowl 6. The rubber main spring 2, the upper disk 3, The lower plate 4 and the leather bowl 6 are arranged in this order, and the outer edges of the rubber main spring 2, the upper plate 3, the lower plate 4, and the leather bowl 6 are pressed against the flange portion. The upper plate 3 and the lower plate 4 are arranged to form an inertia channel, and the decoupling film 5 is provided between the upper plate 3 and the lower plate 4. The upper surface of the decoupling membrane, the upper plate 3 and the rubber main spring 2 constitute an upper fluid chamber, the lower surface of the decoupling membrane, the lower plate 4 and the leather bowl 6 constitute a lower fluid chamber, and the inertia passage communicates with the upper fluid Chamber and lower liquid chamber. The decoupling film 5 has a decoupling film metal frame 16 embedded therein, which improves the rigidity of the decoupling film 5 and ensures that the effective area of the upper and lower liquid chambers of the decoupling film 5 does not change greatly within the stroke range. The outer edge of the leather bowl 6 and the edge of the central hole are embedded with the metal skeleton 17 of the leather bowl to ensure its tightness.

The active vibration isolator 1 includes a coil wound in an iron core 11 in the axial direction, a mover assembly 14 in which a permanent magnet 13 is embedded, a stator, and a reed 15 connecting the mover assembly 14 and the stator. The mover assembly 14 includes a mover outer ring 20, a mover mandrel 21, and a mover flywheel 22 connecting the two. In this embodiment, the active vibration isolator 1 uses an electromagnetic actuator.

The sleeve 23 is sleeved on the mover mandrel 21, and the sleeve 23 and the mover mandrel 21 are fixed by fixing bolts. The connector assembly 7 further includes screws 24, and the passive The vibration isolator passes the central hole of the decoupling membrane 5 and the central hole of the leather bowl 6 in order by using screws 24 and is fixed on the shaft sleeve 23, so that the passive vibration isolator and the active vibration isolator 1 connected in series. The effective area of the decoupling membrane 5 of the integrated vibration isolator acting on the upper and lower liquid chambers is smaller than the effective area of the rubber main spring 2 acting on the upper liquid chamber. The effective area of the rubber main spring 2 acting on the upper liquid chamber is at least decoupled. The membrane acts on twice the effective area of the upper liquid chamber. The main power generated by the active vibration isolator is transmitted to the rubber main spring through the upper liquid chamber. The force is amplified, and the reaction force is the main power applied to the base. This force is also amplified. The main power applied to the base by the active vibration isolator 1 is amplified in the working frequency band by the passive vibration isolator, and is offset by the force transmitted from the vibration source to the base, thereby improving the vibration isolation efficiency. The electromagnetic actuator mover assembly 14 is sealed with the bowl 6 and the decoupling membrane 5 by a seal ring. The connection of the leather bowl 6 moves up and down with the mover assembly 14 and the electromagnetic actuator mover assembly 14 There is no mutual movement with the leather bowl 6 and the decoupling membrane 5. Ensures that the lower liquid chamber is well sealed. The adopted electromagnetic actuator is composed of a coil wound in the iron core 11 in the axial direction, an assembly 14 in which a permanent magnet 13 is embedded, and a reed 15 connecting the assembly 14 and a stator, and has a simple structure and low cost. Reduce power consumption and volume of integrated vibration isolator.

The specific steps of the vibration reduction method of the active-passive integrated vibration isolation device are as follows:

During installation, the rubber main spring 2 is connected to the base. When the signal acquisition device 18 collects the vibration signals of the mechanical equipment, it transmits the signals to the control device. The control device determines the vibration frequency. When the spring 2 receives low-frequency excitation force, the active-passive integrated vibration isolation device works in a passive mode, the passive vibration isolator works, and the active vibration isolator 1 does not work. The pressure and volume of the upper and lower liquid chambers cause the liquid to inertia. The flow in the channel, the inertial channel with a specific liquid volume and liquid resistance will consume part of the vibration energy, thereby inhibiting the transmission of vibration to the base, and generating a vibration isolation effect. When the rubber main spring 2 is subjected to medium and high frequency excitation force, the active-passive integrated vibration isolation device works in an active mode, and both the passive vibration isolator and the active vibration isolator 1 work. The main force, this force acts on the decoupling membrane 5, because the area of the upper fluid chamber acting on the decoupling membrane 5 is smaller than the area of the rubber main spring 2 acting on the upper fluid chamber, the force of the rubber main spring 2 to the base is amplified , Which cancels out the transmitted vibration force, thereby suppressing the transmission of vibration to the base and generating a vibration isolation effect, that is, the force transmitted by the active isolator 1 is amplified by the liquid chamber and finally transmitted to the base, and is transmitted to the base. The vibration forces on the counterbalance. For example, an upward exciting force acting on the rubber main spring 2 is also an upward vibration force transmitted to the base through the rubber main spring 2. The acceleration sensor at the base detects the vibration, and the active vibration isolator 1 controlled by the control device also generates upward main power to be transmitted to the decoupling membrane 5 and amplified and transmitted to the rubber main spring 2 through the upper liquid chamber. The rubber main The spring 2 counteracts a downward reaction force on the base, thereby suppressing transmission of vibration to the base.

The control method adopted by the control device is an FxLMS algorithm. The vibration acceleration signal collected by the acceleration sensor is the error signal e (k). The vibration acceleration signal obtained at the vibration source is the reference signal x (k). The reference signal x (k) is extracted and sampled and input to a horizontal direction in the control device. Filter w (n) to obtain the filtered signal u (k) = x (k) × w (k) × T; u (k) is output from the controller and passes through the secondary channel S (z) (the secondary channel includes Power amplifier, electromagnetic actuator, the transfer function of the electromagnetic actuator output force to the vibration force at the base, the transfer function of the vibration force at the base to the acceleration at the base, etc. y (k) = u (k) × S (z). This main dynamic acceleration signal is superimposed on the vibration acceleration d (k) excited at the base by the exciting force to obtain a true vibration acceleration signal e (k) at the base. The control purpose is to make the error signal e (k) 0 by updating the weight of the transverse filter w (n). The implementation method is to pass the reference signal x (k) into the secondary channel S (z) to obtain a filtered reference signal.

Reuse signal

And error signal e (k), update formula by weight

Update the weights, where μ is the convergence factor, and control the convergence speed of the transverse filter weights. The active-passive integrated vibration isolation device and the FxLMS algorithm together form an integrated vibration isolator system to achieve active control of vibration.

It should be understood that the above description is for illustration and not for limitation. From reading the above description, many embodiments and applications beyond the examples provided will be apparent to those skilled in the art. Therefore, the scope of the present teachings should not be determined with reference to the foregoing description, but should be determined with reference to the foregoing claims and the full scope of equivalents that such claims possess. For the purposes of completeness, all publications and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to abandon that subject matter, nor should the applicant consider that the subject matter was not considered part of the disclosed inventive subject matter.

Claims

An active-passive integrated vibration isolator system includes a signal acquisition device, a control device, and a vibration reduction device. The signal acquisition device collects vibration signals of mechanical equipment and transmits the signals to the control device. The control device is based on the signals. Controlling the vibration damping device to reduce vibration, characterized in that the vibration damping device includes a casing, a passive vibration isolator and an active vibration isolator which are disposed in the casing and fixedly disposed relative to the casing, The vibration isolator and the active vibration isolator are connected in series. The passive vibration isolator and the active vibration isolator are connected by a shaft sleeve. The shaft sleeve is fixed on the active vibration isolator, and the passive vibration isolator is fixed on the vibration isolator. Mentioned sleeve.
The active-passive integrated vibration isolator system according to claim 1, wherein the housing comprises an upper protective cover, a base connecting member, and a lower protective cover, which are sequentially connected, and the base connecting member includes sequentially connecting A connecting portion and a flange portion, the upper protective cover is connected to the flange portion, and the signal acquisition device is disposed on the flange portion.
The active-passive integrated vibration isolator system according to claim 2, wherein the passive vibration isolator includes a rubber main spring and an inertia channel mechanism, and the inertia channel mechanism includes an upper disc, a lower disc, and a decoupling membrane And a rubber bowl, the rubber main spring, upper plate, lower plate, and cup are arranged in this order, and the outer edges of the rubber main spring, upper plate, lower plate, and cup are pressed against the flange portion, so The upper plate and the lower plate are arranged to form an inertia channel, the decoupling film is provided between the upper plate and the lower plate, and the passive vibration isolator is fixed by a fixing screw passing through the decoupling film and the leather bowl in order. On the sleeve.
The active-passive integrated vibration isolator system according to claim 3, wherein the upper surface of the decoupling membrane, the upper disk and the rubber main spring constitute an upper liquid chamber, and the lower surface of the decoupling membrane, the lower disk and The leather bowl constitutes a lower liquid chamber, and the inertia passage communicates with the upper liquid chamber and the lower liquid chamber.
The active-passive integrated vibration isolator system according to claim 3, wherein a metal skeleton is embedded in the decoupling film.
The active-passive integrated vibration isolator system according to claim 2, wherein the active vibration isolator comprises a coil wound in an iron core in the axial direction, a mover assembly embedded with a permanent magnet, a stator, and The reed connecting the mover assembly and the stator, the stator is pressed on the base connecting member through the lower protective cover, and the sleeve is sleeved on the mover assembly.
The active-passive integrated vibration isolator system according to claim 6, wherein the mover assembly includes a mover outer ring, a mover mandrel, and a mover flywheel connecting the two, and the shaft sleeve is sleeved On the mover mandrel.