CN114759722A - Piezoelectric stack vibration damper and motor - Google Patents
Piezoelectric stack vibration damper and motor Download PDFInfo
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- CN114759722A CN114759722A CN202210499357.3A CN202210499357A CN114759722A CN 114759722 A CN114759722 A CN 114759722A CN 202210499357 A CN202210499357 A CN 202210499357A CN 114759722 A CN114759722 A CN 114759722A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
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- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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Abstract
The application discloses piezoelectric stack vibration damper and motor, piezoelectric stack vibration damper includes outer loop, inner ring, piezoelectric stack, interior elastic support and outer elastic support, the inner ring is installed the outer loop inboard and with form annular space between the outer loop, piezoelectric stack, interior elastic support and outer elastic support install in the annular space, outer elastic support's the outside with the outer loop is connected, interior elastic support's the inboard with interior annular connection, outer elastic support's the inboard with interior elastic support's the outside is along radially staggering, piezoelectric stack is even outer elastic support's the inboard with between interior elastic support's the outside. The piezoelectric stack vibration damper has the advantages of good vibration damping and noise reduction effects, simplicity and convenience in assembly, small overall size, light weight, high rigidity, small change of natural frequency of a motor structure after being coupled with a motor and the like.
Description
Technical Field
The application relates to the technical field of vibration reduction, in particular to a piezoelectric stack vibration reduction device which can be applied to a motor or other mechanisms needing vibration reduction.
Background
The electromagnetic noise is a main sound source of the vibration noise of the motor, the radial electromagnetic force acts on the stator iron core along the radial direction and radiates the noise outwards through the motor shell, and when the frequency of the electromagnetic force is close to the modal frequency of the motor, the motor resonates to trigger the violent vibration noise of the motor. The control and the attenuation of the vibration of the motor have important practical significance.
The existing motor vibration reduction structure is mainly characterized in that vibration-proof materials such as rubber pads are arranged below a motor base, but the rubber materials are greatly influenced by temperature and are easy to age, the vibration reduction effect is limited, the function is single, the problem of noise generated by a motor cannot be well solved, the rigidity of the rubber materials is small, and the natural frequency of the motor can be changed after the rubber materials are coupled with the motor. Or the motor is arranged in a vibration damper, a spring is arranged in the vibration damper, when the motor is impacted, the vibration damper reduces the vibration of the motor body through the energy dissipation of the spring in the motion process, the structural parameters of the vibration damper are optimally set aiming at the motor with a specific model under a specific working condition, and the parameters cannot be changed once being set, so that the vibration damper does not have the capability of adaptively reducing the vibration of the motor and lacks the flexibility in control.
Therefore, the improvement of the vibration damping structure of the motor is a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
For solving above-mentioned technical problem, this application provides a piezoelectric stack vibration damper, piezoelectric stack vibration damper includes outer loop, inner ring, piezoelectric stack, interior elastic support and outer elastic support, the inner ring is installed the outer loop inboard and with form annular space between the outer loop, piezoelectric stack, interior elastic support and outer elastic support install in the annular space, outer elastic support's the outside with the outer loop is connected, interior elastic support's the inboard with interior annular connection, outer elastic support's the inboard with interior elastic support's the outside is along radially staggering, piezoelectric stack is even outer elastic support's the inboard with between interior elastic support's the outside.
In one embodiment of the damping device for the piezoelectric stacks, the number of the inner elastic supports and the number of the outer elastic supports are respectively multiple, the piezoelectric stacks are uniformly arranged at intervals along the whole circumference, and each piezoelectric stack is correspondingly arranged between one inner elastic support and one outer elastic support.
In one embodiment of the vibration damping device for the piezoelectric stack, pressure plates are arranged on the outer side of the inner elastic support and the inner side of the outer elastic support, the pressure plates are perpendicular to the radial direction, and the outer end surface and the inner end surface of the piezoelectric stack are respectively attached to the pressure plate of the inner elastic support and the pressure plate of the outer elastic support;
The inner elastic support and the outer elastic support are both provided with support arms, the inner end of the support arm of the outer elastic support is connected with the pressure plate, the outer end of the support arm of the outer elastic support is connected with the outer ring, the outer end of the support arm of the inner elastic support is connected with the pressure plate, the inner end of the support arm of the inner elastic support is connected with the inner ring, and elastic deformation is realized through the angle change of the support arm relative to the pressure plate.
One embodiment of the vibration damper for the piezoelectric stack is characterized in that the inner elastic support and the outer elastic support are provided with a plurality of support arms, the inner end of each support arm of the inner elastic support inclines towards the direction far away from the pressing plate, and the outer end of each support arm of the outer elastic support inclines towards the direction far away from the pressing plate.
One implementation mode of the piezoelectric stack vibration damping device comprises an inner base and an outer base, wherein the outer side of the outer elastic support is connected with the outer base, the outer base is detachably arranged on the outer ring, the inner side of the inner elastic support is connected with the inner base, and the inner base is detachably arranged on the inner ring.
An embodiment of the vibration damper for the piezoelectric stack is characterized in that the outer elastic support, the outer base, the inner elastic support and the inner base are respectively inserted into the groove and the protrusion, at least one end of the groove forms a socket, and the protrusion can be inserted into or pulled out of the socket along the axial direction.
In one embodiment of the vibration damper for a piezoelectric stack, the outer base is connected to the outer ring by a threaded fastener, and the inner base is connected to the inner ring by a threaded fastener.
According to one embodiment of the piezoelectric stack vibration damper, an outer ring boss is arranged on the inner periphery of the outer ring, an inner ring boss is arranged on the outer periphery of the inner ring, the outer base is connected to the outer ring boss, and the inner base is connected to the inner ring boss.
In one embodiment of the vibration damper for the piezoelectric stack, the inner circumferential surface of the inner ring is provided with an inner ring conical surface area.
An embodiment of piezo-electric pile vibration damper, piezo-electric pile vibration damper still includes the supporting ring subassembly, the supporting ring subassembly includes first supporting ring, second supporting ring and fastener, first supporting ring and second supporting ring are equipped with and are used for connecting the connecting hole of fastener, first supporting ring with the second supporting ring is in the fastening force effect of fastener cooperation down is pressed from both sides tightly the both ends of outer loop.
According to one embodiment of the piezoelectric stack vibration damping device, the first supporting ring and the second supporting ring are provided with axial through holes, and the axial through holes and the connecting holes are alternately arranged in a staggered mode one by one along the circumferential direction.
In addition, the application also provides an electric motor, which comprises a housing barrel and the piezoelectric stack vibration damping device as claimed in any one of the claims, wherein the inner ring of the piezoelectric stack vibration damping device is sleeved outside the housing barrel.
In an embodiment of the motor, an outer circumferential surface of the outer casing is provided with an outer casing conical surface area, an inner circumferential surface of an inner ring of the piezoelectric stack vibration damping device is provided with an inner ring conical surface area, and the inner ring conical surface area is sleeved outside the outer casing conical surface area and is matched with the outer casing conical surface area to realize positioning of the inner ring and the outer casing.
An embodiment of the motor, wherein the device for damping piezo-electric stack is as defined in claim, the motor includes a long screw rod and a nut adapted to the long screw rod, the long screw rod is inserted into the axial through hole of the support ring assembly, and the nuts are connected to two ends of the axial through hole of the long screw rod.
An embodiment of motor, the motor is in including blocking the first end cover of shell section of thick bamboo one end, blocking the second end cover of the shell section of thick bamboo other end, with the first ring flange that first end cover links to each other, with the second ring flange that the second end cover links to each other, wear to locate respectively at the both ends of long screw the hole that connects of first ring flange with the hole that connects of second ring flange, and both ends even have the nut, utilize both ends the nut compresses tightly first ring flange with the second ring flange.
The piezoelectric stack vibration damper has the advantages of good vibration and noise reduction effect, simplicity and convenience in assembly, small overall size, light weight, high rigidity, small change of the natural frequency of a motor structure after being coupled with a motor and the like, and certain order squealing noise of the motor can be controlled to the maximum extent by adjusting the resistance and inductance parameters in an external circuit of the piezoelectric stack.
Drawings
FIG. 1 is a perspective view of one embodiment of an electric machine provided herein;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged view of the circled portion of FIG. 2;
FIG. 4 is a perspective view of a support ring assembly of the piezo-electric stack vibration damping device;
FIG. 5 is a sectional view taken along line B-B of the first support ring of FIG. 4;
FIG. 6 is a sectional view taken along line B-B of the second support ring of FIG. 4
FIG. 7 is a perspective view of a piezoelectric stack vibration damping device;
FIG. 8 is a perspective view of the assembled state of the outer ring, the inner ring, the outer elastic support, the inner elastic support, the outer base, the inner base and the piezo-electric stack of the piezo-electric stack vibration damping device;
FIG. 9 is a perspective view of the assembled state of the inner base, the inner ring, the outer base and the outer ring of the vibration damper of the piezoelectric stack;
FIG. 10 is a perspective view of an outer ring of the piezo stack damping device;
FIG. 11 is a perspective view of an inner ring of the piezo stack vibration damping device;
FIG. 12 is a perspective view of an inner or outer base of the piezoelectric stack vibration damping device;
fig. 13 is a perspective view of the assembled state of the inner elastic support, the outer elastic support and the piezoelectric stack of the piezoelectric stack vibration damping device.
The reference numerals are explained below:
100 motor, 101 shell cylinder, 101a shell cylinder conical surface area, 102 long screw rod, 103 nut, 104 first end cover, 105 second end cover, 106 first flange, 107 second flange;
200 piezoelectric stack vibration damping devices, M vibration damping components, 201 outer rings and 201a outer ring bosses; 202 inner ring, 202a inner ring boss, 202B inner ring conical surface area, 203 piezoelectric stack, 203a outer end surface, 203B inner end surface, 204 inner elastic support, 205 outer elastic support, A pressure plate, B support arm, C protrusion, 206 outer base, 207 inner base, D groove, E socket, F seat hole, G threaded fastener, 208 support ring assembly, 2081 first support ring, 2082 second support ring, 2083 fastener, 2084 connecting hole, 2085 through hole.
Detailed Description
The application provides a piezoelectric stack vibration damper, this piezoelectric stack vibration damper can be applied to the motor, can show the vibration and the noise problem that improves the motor when this piezoelectric stack vibration damper is applied to the motor. In addition, the application also provides a motor comprising the piezoelectric stack vibration damping device. In order to make those skilled in the art better understand the technical solution of the present application, the piezoelectric stack vibration damping device and the motor provided in the present application will be described in further detail below with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 and 2, the motor 100 includes a housing 101 and a piezo stack vibration damper 200, and the piezo stack vibration damper 200 is sleeved outside the housing 101.
In this embodiment, the motor 100 further includes a first end cap 104 and a second end cap 105, and the first end cap 104 and the second end cap 105 block both ends of the casing 101, respectively. The electric machine 100 also includes a first flange 106 and a second flange 107. The first flange 106 and the second flange 107 are provided with threaded holes. The first flange 106 is connected to the first end cap 104 and one end of the casing 101 through threaded holes and bolts inserted into the threaded holes, and the second flange 107 is connected to the second end cap 105 and the other end of the casing 101 through threaded holes and bolts inserted into the threaded holes.
In this embodiment, the motor 100 further includes a long screw 102 and a nut 103. The first flange 106 and the second flange 107 are provided with connection holes. One end of the long screw rod 102 is inserted through the hole of the first flange 106, and the other end of the long screw rod 102 is inserted through the hole of the second flange 107. Nuts 103 are connected to both ends of the long screw 102, and the first flange 106 and the second flange 107 are pressed by the nuts 103 at both ends.
As shown in fig. 4-6, in this embodiment, the device 200 is provided with a support ring assembly 208 for supporting, but in some embodiments, the support ring assembly 208 may not be provided.
In this embodiment, the support ring assembly 208 includes a first support ring 2081 and a second support ring 2082. The first support ring 2081 and the second support ring 2082 are provided with a plurality of through holes 2085 and a plurality of connecting holes 2084, and the through holes 2085 and the connecting holes 2084 are arranged in a staggered manner one by one along the circumferential direction.
As shown in fig. 1, the through holes 2085 of the first support ring 2081 and the through holes 2085 of the second support ring 2082 are axially aligned one by one, and long screws 102 are inserted into the through holes, nuts 103 are connected to the long screws 102 on two sides of the first support ring 2081 and the second support ring 2082, and the first support ring 2081 and the second support ring 2082 are pressed by the nuts 103 on two sides. The connecting holes 2084 of the first support ring 2081 and the connecting holes 2084 of the second support ring 2082 are axially aligned one by one, and fasteners 2083 are arranged through the connecting holes to fasten the first support ring 2081 and the second support ring 2082 together. In the connection structure, the long screw 102 and the nut 103 are used for realizing the axial positioning of the piezoelectric stack vibration reduction device 200, the axial position of the piezoelectric stack vibration reduction device 200 can be adjusted by loosening the nut 103, and the axial position of the piezoelectric stack vibration reduction device 200 can be determined by performing vibration noise simulation analysis on the motor 100.
As shown in fig. 3, in this embodiment, the outer peripheral surface of the outer casing 101 has an outer casing conical surface region 101a, the inner peripheral surface of the piezoelectric stack vibration damping device 200, that is, the inner peripheral surface of the inner ring 202, has an inner annular conical surface region 202b, the inner annular conical surface region 202b is sleeved outside the outer casing conical surface region 101a, and the diameter of the inner annular conical surface region 202b and the diameter of the outer casing conical surface region 101a are tapered or increased in the same direction. The inner ring conical surface area 202b is matched with the outer shell cylinder conical surface area 101a, and the radial accurate positioning of the piezoelectric stack vibration damping device 200 and the further accurate positioning of the axial position of the piezoelectric stack vibration damping device 200 are realized by the matching of the outer shell cylinder conical surface area 101a and the inner ring conical surface area 202 b.
As shown in fig. 7 and 8, the piezo stack vibration damping device 200 includes a vibration damping assembly M including at least an outer ring 201, an inner ring 202, a piezo stack 203, an inner elastomeric mount 204, and an outer elastomeric mount 205. The outer ring 201 is clamped by a first support ring 2081 and a second support ring 2082. The inner ring 202 is mounted inside the outer ring 201, and an annular space is formed between the inner ring and the outer ring 201. Mounted in the annular space are a piezoelectric stack 203, an inner elastomeric mount 204, and an outer elastomeric mount 205. The outer side of the outer elastomeric support 205 is connected to the outer ring 201 and the inner side of the inner elastomeric support 204 is connected to the inner ring 202. The inner side of the outer elastomeric support 205 is radially offset from the outer side of the inner elastomeric support 204. The piezoelectric stack 203 is attached between the inside of the outer elastomeric support 205 and the outside of the inner elastomeric support 204.
With the piezoelectric stack vibration damping device 200, when radial electromagnetic force is transmitted to the outer shell 101 of the motor 100 through the stator of the motor 100 to cause the outer shell 101 to vibrate, the inner elastic support 204 and the outer elastic support 205 of the piezoelectric stack vibration damping device 200 extrude the piezoelectric stack 203 under the action of vibration force, so that the piezoelectric stack 203 radially stretches, the piezoelectric stack 203 generates a positive piezoelectric effect, and mechanical energy generated by vibration is converted into electric energy under the action of the positive piezoelectric effect. The piezoelectric stack 203 is connected with an external circuit, a resistance element and an inductance element are connected in series or in parallel on the external circuit, and electric energy is dissipated by the resistance element in the external circuit, so that the vibration and noise are effectively controlled. Certain-order squeal noise of the motor 100 can be controlled to the maximum extent by adjusting resistance parameters and inductance parameters in an external circuit.
In this embodiment, the number of the piezoelectric stacks 203, the number of the inner elastic supports 204, and the number of the outer elastic supports 205 are plural, the piezoelectric stacks 203 are arranged at regular intervals in the circumferential direction, the inner elastic supports 204 are arranged at regular intervals in the circumferential direction, and the outer elastic supports 205 are also arranged at regular intervals in the circumferential direction. Each piezoelectric stack 203 is disposed between the outside of an inner elastomeric support 204 and the inside of an outer elastomeric support 205. By the arrangement, in the vibration reduction and noise reduction process, the expansion degrees of the piezoelectric stacks 203 at different positions in the circumferential direction can be different, so that the vibration forces in different radial directions can be better consumed. More preferably, the number of the piezoelectric stacks 203 is even, and the piezoelectric stacks 203 are symmetric with respect to each other in pairs about the circumferential center, so that the coupling effect of the piezoelectric stacks 203 can be fully exerted, and good vibration and noise reduction effects can be achieved in different radial directions of the motor 100. Of course, in other embodiments, only one piezoelectric stack 203, one inner elastic support 204 and one outer elastic support 205 may be provided, such that the piezoelectric stack 203, the inner elastic support 204 and the outer elastic support 205 are distributed over the entire circumference.
Referring to fig. 8 and 9, in this embodiment, the piezoelectric stack vibration damping device 200 further includes an inner base 207 and an outer base 206, the outer side of the outer elastic support 205 is connected to the outer base 206, the outer base 206 is detachably mounted to the outer ring 201, the inner side of the inner elastic support 204 is connected to the inner base 207, and the inner base 207 is detachably mounted to the inner ring 202. Because the inner base 207 and the outer base 206 can be formed separately from the inner ring 202 and the outer ring 201, a connecting structure for connecting the inner elastic support 204 and the outer elastic support 205 can be conveniently formed on the inner base 207 and the outer base 206, in addition, the inner base 207 and the outer base 206 can prevent the inner elastic support 204 and the outer elastic support 205 from being worn to the inner ring 202 and the outer ring 201 in the deformation process, and the inner base 207 and the outer base 206 can be replaced after the inner base 207 and the outer base 206 are worn.
Specifically, the inner elastic support 204 and the inner ring 202 and the outer elastic support 205 and the outer ring 201 can be detachably connected by a threaded fastener G, and the detachable connection is stable and reliable and is easy to disassemble and assemble, and certainly, the detachable connection is not limited to threaded connection and can also be clamped.
Specifically, as shown in fig. 10 and 11, the inner circumference of the outer ring 201 may be provided with an outer ring boss 201a, the outer circumference of the inner ring 202 may be provided with an inner ring boss 202a, the outer base 206 may be connected to the outer ring boss 201a, and the inner base 207 may be connected to the inner ring boss 202 a. The arrangement of the outer ring boss 201a and the inner ring boss 202a is beneficial to enhancing the structural strength of the outer ring 201 and the inner ring 202, and can ensure the structural strength of the connection position of the outer base 206 and the outer ring 201 and the connection position of the inner base 207 and the inner ring 202 and increase the overall rigidity of the piezoelectric stack vibration damper.
Specifically, the inner base 207 and the outer base 206 may have the same structure, so as to facilitate mass production and reduce the production cost.
Specifically, the inner base 207 and the inner elastic support 204, and the outer base 206 and the outer elastic support 205 may be plugged through the groove D and the protrusion C, respectively. In the illustrated embodiment, as shown in fig. 12 and 13, the groove D is disposed on the inner base 207 or the outer base 206, and the protrusion C is disposed on the inner elastic support 204 or the outer elastic support 205, although the positions of the groove D and the protrusion C may be reversed. In addition, a socket E is formed at least at one end of the groove D, so that the protrusion C can be inserted into or pulled out of the groove D along the axial direction through the socket E, and thus, the inner elastic support 204 and the outer elastic support 205 can be disassembled without disassembling other components of the piezoelectric stack vibration damping device 200, and the whole piezoelectric stack vibration damping device 200 is more convenient to disassemble, assemble, repair and maintain.
Specifically, as shown in fig. 13, in this embodiment, a pressing plate a is disposed on both the outer side of the inner elastic support 204 and the inner side of the outer elastic support 205. The pressing plate A is perpendicular to the radial direction, the outer end surface 203a and the inner end surface 203b of the piezoelectric stack 203 are respectively attached to the pressing plate A of the inner elastic support 204 and the pressing plate A of the outer elastic support 205, and the outer end surface 203a and the inner end surface 203b of the piezoelectric stack 203 are perpendicular to the polarization direction of the piezoelectric stack 203. Thus, when the piezoelectric stack 203 is subjected to radial force, the radial force uniformly acts on the piezoelectric stack 203 through the pressing plate A, the piezoelectric stack 203 can be guaranteed to be basically only subjected to the radial force without being subjected to the shearing force along the circumferential direction, and the problem that the piezoelectric stack 203 is prone to failure due to the shearing force is solved.
In particular, in this embodiment, the inner elastic support 204 and the outer elastic support 205 are both provided with a support arm B. The inner end of the arm B of the outer elastic support 205 is connected with the pressure plate A of the outer elastic support 205, and the outer end is directly connected with the outer ring 201 or indirectly connected with the outer ring 201 through the outer base 206. The outer end of arm B of inner spring support 204 is connected to pressure plate A of inner spring support 204, and the inner end is connected to inner ring 202 directly or indirectly through inner base 207 to inner ring 202. In this embodiment, the inner ends of arms B of inner resilient support 204 and the outer ends of arms B of outer resilient support 205 form protrusions C that mate with grooves D on inner base 207 and outer base 206.
Through the arrangement of the support arm B, the elastic deformation of the inner elastic support 204 and the outer elastic support 205 is realized by utilizing the angle change of the support arm B relative to the pressure plate A, and the inner elastic support 204 and the outer elastic support 205 in the structure are easier to deform when bearing radial force, so that the piezoelectric stack 203 can be pressed under the action of smaller radial force, and the smaller radial force can be timely converted into electric energy by the piezoelectric stack 203. Preferably, the arm B is of a thin sheet-like structure, which is more easily deformable. Preferably, the number of the arms B of the inner elastic support 204 and the outer elastic support 205 is multiple, and the inner end of each arm B of the inner elastic support 204 is inclined relative to the outer end in a direction away from the pressure plate a, and the outer end of each arm B of the outer elastic support 205 is inclined relative to the inner end in a direction away from the pressure plate a, so that the inner elastic support is easier to deform and easier to guide the force to the pressure plate a in a concentrated manner.
During assembly, the vibration damping component M can be assembled firstly: firstly, the inner end face and the outer end face of the piezoelectric stack 203 are respectively stuck between a pressure plate A of the inner elastic support 204 and a pressure plate A of the outer elastic support 205, then the inner base 207 and the outer base 206 are fixed on the inner ring boss 202a and the outer ring boss 201a by using a threaded fastener 2083G, and then the inner elastic support 204 and the outer elastic support 205 which are assembled with the piezoelectric stack 203 are respectively inserted into the grooves D of the inner base 207 and the outer base 206 along the axial direction.
The vibration damping module M is then assembled outside the casing 101 of the electric machine 100.
The support ring assembly 208 is then installed: the first support ring 2081 and the second support ring 2082 are fixed by a threaded fastener 2083, then the long screw 102 penetrates into the through holes 2085 of the first support ring 2081 and the second support ring 2082, then the nut 103 is screwed on the positions of the long screw 102 at the two sides of the first support ring 2081 and the second support ring 2082, and the first support ring 2081 and the second support ring 2082 are pressed by the nut 103 at the two sides.
Then, the first flange 106 and the second flange 107 are installed, nuts 103 are screwed on both ends of the long screw 102, and the first flange 106 and the second flange 107 are pressed by the nuts 103 on both ends.
The first end cap 104 and the second end cap 105 are then installed and the first end cap 104 and the first flange 106 and the second end cap 105 and the second flange 107 are bolted together.
Note that, in the description of the present application, a position relatively close to the circumferential center is set as an inner position, and a position relatively far from the circumferential center is set as an outer position.
In general, the piezoelectric stack vibration damping device 200 provided by the application has the advantages of good vibration damping and noise reduction effects, simplicity and convenience in assembly, small overall size, light weight, large rigidity, small change in the natural frequency of the structure of the motor 100 after being coupled with the motor 100, and the like, and can control squeaking noise of a certain order of the motor 100 to the maximum extent by adjusting the resistance and inductance parameters in the external circuit of the piezoelectric stack 203.
The foregoing has been a description of the principles and embodiments of the present application using specific examples, which are provided only to assist in understanding the method and the core concepts of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (15)
1. The piezoelectric stack vibration damper is characterized in that the piezoelectric stack vibration damper (200) comprises an outer ring (201), an inner ring (202), a piezoelectric stack (203), an inner elastic support (204) and an outer elastic support (205), the inner ring (202) is arranged inside the outer ring (201) and forms an annular space with the outer ring (201), the piezoelectric stack (203), the inner elastic support (204) and the outer elastic support (205) are arranged in the annular space, the outer side of the outer elastic support (205) is connected with the outer ring (201), the inner side of the inner elastic support (204) is connected with the inner ring (202), the inner side of the outer elastic support (205) is staggered with the outer side of the inner elastic support (204) along the radial direction, the piezoelectric stack (203) is connected between the inner side of the outer elastic support (205) and the outer side of the inner elastic support (204).
2. The device for damping the piezoelectric stack according to claim 1, wherein the number of the piezoelectric stacks (203), the number of the inner elastic supports (204) and the number of the outer elastic supports (205) are respectively multiple, the piezoelectric stacks (203) are uniformly spaced along the whole circumference, and each piezoelectric stack (203) is correspondingly arranged between one inner elastic support (204) and one outer elastic support (205).
3. The vibration reduction device for the piezoelectric stack according to claim 1, wherein a pressure plate (A) is arranged on the outer side of the inner elastic support (204) and on the inner side of the outer elastic support (205), the pressure plates (A) are perpendicular to the radial direction, and the outer end surface (203a) and the inner end surface (203b) of the piezoelectric stack (203) are respectively attached to the pressure plate (A) of the inner elastic support (204) and the pressure plate (A) of the outer elastic support (205);
interior elastic support seat (204) with outer elastic support seat (205) all is equipped with support arm (B), the support arm (B) of outer elastic support seat (205) inner with clamp plate (A) are connected, the outer end with outer ring (201) are connected, the outer end of support arm (B) of interior elastic support seat (204) with clamp plate (A) are connected, the inner with inner ring (202) are connected, through support arm (B) is relative the angular variation of clamp plate (A) realizes elastic deformation.
4. The device for damping the vibration of the piezoelectric stack according to claim 3, wherein a plurality of support arms (B) are arranged on the inner elastic support (204) and the outer elastic support (205), the inner end of each support arm (B) of the inner elastic support (204) inclines towards the direction far away from the pressure plate (A) relative to the outer end, and the outer end of each support arm (B) of the outer elastic support (205) inclines towards the direction far away from the pressure plate (A) relative to the inner end.
5. The device according to claim 1, wherein the device (200) comprises an inner base (207) and an outer base (206), the outer side of the outer elastic support (205) is connected to the outer base (206), the outer base (206) is detachably mounted to the outer ring (201), the inner side of the inner elastic support (204) is connected to the inner base (207), and the inner base (207) is detachably mounted to the inner ring (202).
6. The device according to claim 5, characterized in that the outer elastic support (205) and the outer base (206) and the inner elastic support (204) and the inner base (207) are respectively inserted by a groove (D) and a protrusion (C), at least one end of the groove (D) forms a socket (E), so that the protrusion (C) can be axially inserted into or pulled out of the groove (D) through the socket (E).
7. The device according to claim 6, characterized in that the outer base (206) is connected to the outer ring (201) by means of threaded fasteners (G), and the inner base (207) is connected to the inner ring (202) by means of threaded fasteners (G).
8. The device according to claim 7, wherein the outer ring (201) is provided with an outer ring boss (201a) on the inner circumference, the inner ring (202) is provided with an inner ring boss (202a) on the outer circumference, the outer base (206) is connected to the outer ring boss (201a), and the inner base (207) is connected to the inner ring boss (202 a).
9. The piezoelectric stack vibration damping device according to claim 1, characterized in that the inner peripheral surface of the inner ring (202) is provided with an inner ring conical surface area (202 b).
10. The device according to any one of claims 1 to 9, wherein the device (200) further comprises a support ring assembly (208), the support ring assembly (208) comprises a first support ring (2081), a second support ring (2082) and a fastener (2083), the first support ring (2081) and the second support ring (2082) are provided with connecting holes (2084) for connecting the fastener (2083), and the first support ring (2081) and the second support ring (2082) are matched with each other to clamp two ends of the outer ring (201) under the action of the fastening force of the fastener (2083).
11. The piezoelectric stack vibration damping device according to claim 10, wherein the first support ring (2081) and the second support ring (2082) are provided with axial through holes (2085), and the plurality of axial through holes (2085) and the plurality of connecting holes (2084) are alternately arranged in a staggered manner one by one along the circumferential direction.
12. Electrical machine, characterized in that the electrical machine (100) comprises a housing cylinder (101) and a piezo stack vibration damper (200) according to any of claims 1 to 11, the inner ring (202) of the piezo stack vibration damper (200) being fitted around the housing cylinder (101).
13. The motor according to claim 12, wherein an outer peripheral surface of the outer shell (101) is provided with an outer shell conical surface area (101a), an inner peripheral surface of an inner ring (202) of the piezoelectric stack vibration damper (200) is provided with an inner annular conical surface area (202b), and the inner annular conical surface area (202b) is sleeved outside the outer shell conical surface area (101a) and is matched with the outer shell conical surface area (101a) to realize the positioning of the inner ring (202) and the outer shell (101).
14. The electric machine according to claim 13, wherein the piezoelectric stack vibration damping device (200) is the piezoelectric stack vibration damping device (200) according to claim 11, the electric machine (100) comprises a long screw (102) and a nut (103) matched with the long screw (102), the long screw (102) is arranged in an axial through hole (2085) of the support ring assembly (208) in a penetrating manner, and the nut (103) is connected to the long screw (102) at two ends of the axial through hole (2085).
15. The motor according to claim 14, wherein the motor (100) comprises a first end cover (104) blocking one end of the housing cylinder (101), a second end cover (105) blocking the other end of the housing cylinder (101), a first flange (106) connected with the first end cover (104), and a second flange (107) connected with the second end cover (105), two ends of the long screw (102) are respectively arranged through a connecting hole of the first flange (106) and a connecting hole of the second flange (107), and two ends are connected with nuts (103), and the nuts (103) at two ends are used for pressing the first flange (106) and the second flange (107).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210499357.3A CN114759722A (en) | 2022-05-09 | 2022-05-09 | Piezoelectric stack vibration damper and motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210499357.3A CN114759722A (en) | 2022-05-09 | 2022-05-09 | Piezoelectric stack vibration damper and motor |
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| Publication Number | Publication Date |
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| CN114759722A true CN114759722A (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210499357.3A Pending CN114759722A (en) | 2022-05-09 | 2022-05-09 | Piezoelectric stack vibration damper and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306698A (en) * | 2022-07-08 | 2022-11-08 | 潍柴动力股份有限公司 | Wear testing device |
-
2022
- 2022-05-09 CN CN202210499357.3A patent/CN114759722A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115306698A (en) * | 2022-07-08 | 2022-11-08 | 潍柴动力股份有限公司 | Wear testing device |
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Country or region after: China Address after: No.197a, Fushou East Street, Weifang hi tech Industrial Development Zone, Shandong 261000 Applicant after: WEICHAI POWER Co.,Ltd. Applicant after: Weichai New Energy Power Technology Co.,Ltd. Address before: No.197a, Fushou East Street, Weifang hi tech Industrial Development Zone, Shandong 261000 Applicant before: WEICHAI POWER Co.,Ltd. Country or region before: China Applicant before: Weichai New Energy Technology Co.,Ltd. |
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