CN110778653B - Active elastic ring dry friction damper of rotor supporting structure of rotary machine - Google Patents
Active elastic ring dry friction damper of rotor supporting structure of rotary machine Download PDFInfo
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- CN110778653B CN110778653B CN201911026913.XA CN201911026913A CN110778653B CN 110778653 B CN110778653 B CN 110778653B CN 201911026913 A CN201911026913 A CN 201911026913A CN 110778653 B CN110778653 B CN 110778653B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
Abstract
The invention discloses an active elastic ring dry friction damper of a rotor supporting structure of a rotary machine. Wherein, the dynamic friction plate is arranged on the inner ring of the elastic ring to form a dynamic friction assembly; the static friction plate and the force sensor are fixed on the static friction plate bracket to form a static friction assembly. And a friction pair is formed between the dynamic friction component and the static friction component. The active elastic ring dry friction damper can change the positive pressure on the friction pair through the matching of an electromagnet coil and a C-shaped magnet or the driving of a left axial disc-shaped split spring and a right axial disc-shaped split spring with a piezoelectric actuator, so as to control the friction force and realize the active control on the vibration and the stability of a rotary mechanical rotor system. Therefore, the method has wide application prospect in the active control of the vibration of the rotary mechanical rotor system.
Description
Technical Field
The invention relates to the field of rotary machinery, in particular to a driving elastic ring dry friction damper of a rotor supporting structure of rotary machinery.
Background
Any rotating machine has natural vibration, and when the external excitation frequency is the same as the natural frequency, the rotating rotor generates self-excited vibration, which can cause very serious consequences when serious, especially for high-speed rotor systems (such as aircraft engines, gas turbines, turboexpanders, turbochargers, high-speed blowers, etc.) with continuously rising rotating speed, and the operating rotating speed of the high-speed rotor systems often spans the critical rotating speed of the first order, the second order or even the third order. When the rotation speed is close to or passes through the critical rotation speed, the rotor generates large vibration, especially in a rotor system supported by pure rolling bearings (with rigidity and without damping). In order to solve the problem, a damping link is often added to a rolling bearing support to meet the requirements of rigidity and damping when a rotor system runs at a high speed, so that the vibration of the rotor system is effectively controlled, the stability of the rotor system is improved, external damping is increased in transmission, complex nonlinear response can be caused by the serious nonlinear characteristic of the method, and finally the vibration suppression effect of the elastic support fails.
With the advent of industry 4.0, the rotors of most rotating machines in modern industrial technology have been developed towards flexible structures. The traditional elastic support is widely applied to the suppression of the supercritical vibration of the flexible rotor due to the characteristics of simple structure, easiness in implementation and the like. However, in general, the elastic support, especially the elastic support adopting the rolling bearing, can provide very little damping for the rotor system, and cannot meet the requirement of the rotor system on the damping, so the elastic support function adopting the elastic ring to adjust the support rigidity enables the rotor system to work safely under the conditions of high speed and large unbalance. However, most of the existing elastic ring dry friction dampers belong to passive control, and the problems that the optimal vibration control cannot be realized according to the vibration state of a rotor and the like exist. Therefore, it is very necessary to provide an active vibration control method to realize real-time control of the damping force of the elastic ring dry friction damper.
Disclosure of Invention
The invention provides an active elastic ring dry friction damper of a rotor supporting structure of a rotary machine, aiming at overcoming the defects that the prior elastic ring dry friction damper as a passive control damping mechanism can not carry out optimal control according to the vibration state of a rotor and the friction surface of an elastic ring is overheated for a long time.
The purpose of the invention is realized by the following technical scheme: a dry friction damper of an active elastic ring of a rotor supporting structure of a rotary machine comprises a rotating shaft, a bearing, a left dynamic friction plate, a right dynamic friction plate, an elastic ring outer ring, an elastic ring inner ring, a radial spring, a left static friction plate, a right static friction plate, a left force sensor, a right force sensor, a left static friction plate support, a right static friction plate support, a left positioning ball, a right positioning ball and a damper shell. The dynamic friction plate and the elastic ring inner ring form a dynamic friction assembly; the left and right static friction plates, the left and right force sensors and the left and right static friction plate supports respectively form a left static friction assembly and a right static friction assembly.
The elastic ring inner ring and the elastic ring outer ring form an elastic ring, the elastic ring is provided with a plurality of annular cylinder sleeves, rectangular bosses are uniformly distributed in an inner-outer staggered mode, bosses on the elastic ring inner ring are called inner bosses, bosses on the elastic ring outer ring are called outer bosses, and an elastic body structure is arranged between the inner bosses and the outer bosses on the circumference of the elastic ring; the axial length of the elastic ring is not less than the outside size of the bearing; the axial length of the lug boss on the elastic ring is more than or equal to the width of the bearing.
The left and right movable friction plates are respectively fixed on two sides of the inner ring of the elastic ring, the left and right movable friction plates protrude out of two sides of the inner ring of the elastic ring, and the inner circular surface of the inner ring of the elastic ring is connected with the rotating shaft through a bearing. The static friction plate is fixed on the force sensor, the force sensor is fixed on the static friction plate bracket, and the static friction plate protrudes out of the static friction plate bracket; certain gaps are reserved between the left and right static friction plates, the outer rings of the left and right force sensors and the left and right static friction plate supports, and the left and right static friction plate supports are matched with positioning balls in the damper shell to complete radial and circumferential positioning.
Furthermore, the left and right dynamic friction plates and the left and right static friction components are of symmetrical structures and have the characteristic of self-balancing force.
Furthermore, the dynamic friction plate and the static friction plate can be circular rings with equal thickness or fan-shaped or annular structures with base body structures, and the materials of the dynamic friction plate and the static friction plate can be combinations of steel, copper, powder metallurgy, carbon-carbon composite materials and the like.
Further, the damper may be driven by electromagnet coils in conjunction with C-magnets or left and right axial disc-shaped split springs with piezoelectric actuators.
The invention has the beneficial effects that:
(1) the invention can realize the active vibration control of the active elastic ring dry friction damper of the rotor supporting structure of the rotary machine on the rotor through electromagnetic control or piezoelectric control.
(2) When the dry friction damper is electromagnetically controlled, a magnetic field is generated under the action of the current of the coil to form axial suction, so that the static friction component moves inwards, an axial positive pressure which changes along with the current of the coil is generated on the friction pair, and the dry friction damper can be easily adjusted by adjusting the current, so that the active vibration control of the dry friction damper on the rotor is realized.
(3) When the dry friction damper is controlled by piezoelectricity, the voltage on the piezoelectric actuator is controlled to control the axial force of the left and right axial disc-shaped split springs on the static friction component, the axial positive pressure on the two friction pairs is changed, and the magnitude of the friction force is controlled, so that the necessary damping is added to a rotor system through the elastic support, and the vibration and the stability of the rotor system are actively controlled.
(4) The invention adopts the elastic ring, has good rigidity performance matching degree, compact structure space and stronger self-adaptability, and is beneficial to improving the nonlinear and rotating states of the damper.
Drawings
FIG. 1(a) is a schematic diagram of the right half of an active elastic ring dry friction damper of a rotor supporting structure of a rotary machine in an electromagnetic structure;
FIG. 1(b) is a cross-sectional view of an active elastic ring dry friction damper of a rotor supporting structure of a rotary machine in an electromagnetic structure;
FIG. 2(a) is a schematic diagram and its cross-sectional view of an active elastic ring dry friction damper of a rotary machine rotor support structure in a piezoelectric configuration;
FIG. 2(b) is a cross-sectional view of an active elastic ring dry friction damper of a rotary machine rotor support structure in a piezoelectric configuration;
FIG. 3 is a front and side view of the elastic ring;
FIG. 4 is a block diagram of an axial Belleville spring;
in the figure: 1. a rotating shaft; 2. a bearing; 3. an elastic ring inner ring; 4. a support spring; 5. an elastic ring outer ring; 6A, a right damper shell; 6B, a left damper shell; 7A, a right axial disc-shaped split spring; 7B, a left axial disc-shaped split spring; 8A, a right force sensor; 8B, a left force sensor; 9A, a right static friction plate; 9B, a left static friction plate; 10A, a right dynamic friction plate; 10B, a left dynamic friction plate; 11A, a right static friction plate bracket; 11B, a left static friction plate bracket; 12A, a right outer positioning ball; 12B, a left outer positioning ball; 13. an upper damper housing; a C-type magnet; 15. an electromagnet coil; 16. a ring spring.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The invention provides an active elastic ring dry friction damper of a rotor supporting structure of a rotary machine, which comprises a rotating shaft 1; a bearing 2; an elastic ring inner ring 3; an axial spring 4; a spring ring outer ring 5; a right damper housing 6A; a left damper housing 6B; a right force sensor 8A; a left force sensor 8B; a right static friction plate 9A; a left static friction plate 9B; a right dynamic friction plate 10A; a left movable friction plate 10B; a right friction plate holder 11A; a left friction plate holder 11B; a right outer positioning ball 12A; the left outer positioning ball 12B.
As shown in fig. 3, the elastic ring inner ring 3 and the elastic ring outer ring 5 form an elastic ring, the elastic ring has a plurality of annular sleeves with rectangular bosses distributed inside and outside in a staggered manner, the bosses on the elastic ring inner ring 3 are called inner bosses, the bosses on the elastic ring outer ring 5 are called outer bosses, and on the circumference of the elastic ring, an elastic body structure is arranged between the inner bosses and the outer bosses, and metal rubber can be selected; the axial length of the elastic ring is not less than the outside size of the bearing; the axial length of the lug boss on the elastic ring is more than or equal to the width of the bearing.
The left and right dynamic friction plates and the left and right static friction components are of symmetrical structures and have the characteristic of self-balancing force. The right movable friction plate 10A and the left movable friction plate 10B are respectively fixed on two sides of the elastic ring inner ring 3, the right movable friction plate 10A and the left movable friction plate 10B protrude out of two sides of the elastic ring inner ring 3, and the inner circular surface of the elastic ring inner ring 3 is connected with the rotating shaft 1 through a bearing 2. The right static friction plate 9A is fixed on the right force sensor 8A, the right force sensor 8A is fixed on the right static friction plate bracket 11A, the left static friction plate 9B is fixed on the left force sensor 8B, the left force sensor 8B is fixed on the left static friction plate bracket 11B, and the left static friction plate and the right static friction plate protrude out of the left static friction plate bracket and the right static friction plate bracket; certain gaps are reserved between the left and right static friction plates, the outer rings of the left and right force sensors and the left and right static friction plate supports, and the left and right static friction plate supports are matched with a right outer positioning ball 12A and a left outer positioning ball 12B in the damper shell to complete radial and circumferential positioning.
The dynamic friction plate and the static friction plate can be rings with equal thickness or fan-shaped or annular structures with base body structures, and the materials of the dynamic friction plate and the static friction plate can be combinations of steel, copper, powder metallurgy, carbon-carbon composite materials and the like.
An active elastic ring dry friction damper of a rotor supporting structure of a rotary machine can be driven by an electromagnet coil matched with a C-shaped magnet or a left and right axial disc-shaped split spring with a piezoelectric actuator.
Example 1
As shown in fig. 1(a), the active elastic ring dry friction damper of the rotor supporting structure of the rotating machine is driven by an electromagnet coil 15 in cooperation with a C-shaped magnet 14, and the electromagnet coil 15 wound in the circumferential direction is placed on the C-shaped magnet 14 to form an electromagnet assembly, and the electromagnet assembly is located between a static friction plate support and an elastic ring outer ring 5. The right static friction plate bracket 11A and the left static friction plate bracket 11B are made of magnetic materials with good magnetic conductivity; the material of other parts can be magnetic conductive material or non-magnetic conductive material. The right movable friction plate is fixed on the outer side of the elastic ring outer ring 5, the static friction plate is arranged on the outer side of the movable friction plate, the movable friction plate and the static friction plate are both circular rings, the outer diameter of the movable friction plate is slightly smaller than the outer diameter of the static friction plate, and the inner diameter of the movable friction plate is slightly larger than the inner diameter of the static friction plate.
The outer side of the static friction plate support is fixed on the right damper outer shell 6A, and the outer surface of the static friction plate support is in clearance-free or micro-clearance fit with the right outer positioning ball 12A in the upper damper outer shell 13, as shown in fig. 2(b), radial and circumferential positioning is completed, but flexible movement in the axial direction is possible. The upper end of the C-shaped magnet 14 is positioned by a positioning surface on the upper damper housing 13, and the right side of the upper damper housing 13 is tightly connected with the right damper housing 6A. The static friction plate bracket is connected with the right damper shell 6A through an elastic gasket. The annular spring 16 between the inner side of the static friction plate bracket and the outer ring 5 of the elastic ring is positioned at the outer side of the electromagnet assembly; an annular spring 16 is fixed inside the plate holder and under the C-shaped magnet 13. The annular spring is in a normal state or a compressed state in an initial state, and outward axial force is guaranteed between the static friction components. A gap is reserved between the outer side of the electromagnet assembly and the outer ring 5 of the elastic ring. A gap is reserved between the electromagnet assembly and the static friction plate bracket to realize the axial movement of the static friction assembly, and the gap is smaller than the gap between the dynamic friction plate and the elastic ring outer ring 5.
The electromagnet coil 15, the C-shaped magnet 14 and the static sheet support in the electromagnet assembly described in fig. 1 form a closed magnetic circuit. The magnetic field is generated under the action of the coil current to form axial suction force, so that the static friction component moves inwards, an axial positive pressure which changes along with the coil current is generated on the friction pair, and when the right dynamic friction plate 10A moves along with the elastic ring inner ring 3 in the radial direction, a dry friction force is generated, and necessary damping is added to a rotor system through the elastic ring. The right damper shell 6A is connected with the static friction plate support through a bolt, an elastic gasket is arranged between the right damper shell and the static friction plate support, the annular spring is in a free state or a compression state under the initial state by adjusting the pretightening force on the fixing bolt, and the output of the positive pressure on the force sensor is zero or a set value. When the positive pressure output is zero, the static friction-free work of the dry friction damper can be realized, and the influence of the static friction on the dynamic characteristics of the rotor system is reduced.
During assembly:
when the active elastic ring dry friction damper of the rotor supporting structure of the rotary machine is driven by matching the electromagnet coil 15 with the C-shaped magnet 14, firstly, the electromagnet coil 15 and the C-shaped magnet 14 are combined into an electromagnet assembly according to the structural position requirement, and the coil leading-out wires are connected in parallel. Secondly, fixing the static friction plate on the force sensor according to the structural position requirement, fixing the force sensor on a static friction plate support, and enabling the static friction plate to protrude out of the static friction plate support after installation to form a static friction assembly. And finally, installing an outer positioning ball and a lubricating material in the damper shell according to the structural position requirement, and fixing the outer positioning ball and the lubricating material at the end part.
Further, the dry friction damper is assembled, and the dynamic friction assembly is installed. Firstly, fixing the dynamic friction plate on one side of the inner ring of the elastic ring, and after the installation, the dynamic friction plate protrudes out of the inner ring of the elastic ring. And secondly, an electromagnet assembly is arranged in the upper damper shell outside the outer ring of the elastic ring and is fastened on the upper damper shell. Then, the static friction component is arranged on the inner side of the right damper shell according to requirements, the outer side of the static friction component is fixed by the right damper shell, and the upper side of the static friction component is tightly combined with an outer positioning ball in the upper damper shell; finally, an annular spring is fixed on the lower side of the electromagnet assembly and the inner side of the static friction plate bracket.
Further, the assembled dry friction damper is debugged, the annular spring is in a free state or a compression state under the initial state by adjusting the pretightening force on the bolt of the right damper shell, and the positive pressure output on a force sensor in the static friction assembly is zero or a set value. And finally, fixing the upper damper shell on the outer ring of the elastic ring to complete the assembly of the whole dry friction damper.
When vibration and stability of a rotor system need to be controlled through external damping, firstly, the magnitude of control current needed to be applied to a coil of an electromagnet assembly is determined according to the magnitude of required dry friction force, under the action of the coil current, axial electromagnetic attraction is carried out on a static friction assembly, the static friction assembly overcomes the elastic force of an annular spring to approach a dynamic friction plate, axial positive pressure is generated on a friction pair formed by the dynamic friction plate and the static friction plate, and then the dry friction force is generated, so that necessary damping is provided for a rotor system. The dry friction force on the friction pair can be controlled in real time through the current on the electromagnet coil, so that the vibration and the stability of the rotor system can be actively controlled.
Example 2
As shown in fig. 2(a), the active elastic ring dry friction damper of the rotary machine rotor support structure is driven by left and right axial disc-shaped split springs with piezoelectric actuators.
The right axial disc-shaped split spring 7A is arranged between the right static friction plate bracket 11A and the right damper shell 6A, fixedly connected with the right damper shell 6A and slidably connected with the right static friction plate bracket 11A, and the left axial disc-shaped split spring 7B is arranged between the left static friction plate bracket 11B and the left damper shell 6B, fixedly connected with the left damper shell 6B and slidably connected with the left static friction plate bracket 11B. The right dynamic friction plate 10A, the left dynamic friction plate 10B, the right static friction plate 9A and the left static friction plate 9B are all annular, and the outer diameter of the dynamic friction plates is slightly smaller than that of the static friction plates; the inner diameter of the dynamic friction plate is slightly larger than that of the static friction plate. The right dynamic friction plate 10A and the left dynamic friction plate 10B are respectively fixed on two sides of the elastic ring inner ring 3, and the left dynamic friction plate 10A and the right dynamic friction plate 10B both protrude out of the elastic ring inner ring 3.
The right static friction plate 9A and the left static friction plate 9B are fixed on the right force sensor 8A and the left force sensor 8B, then the right force sensor 8A and the left force sensor 8B are respectively fixed on the right static friction plate support 11A and the left static friction plate support 11B, and gaps are reserved between the right static friction plate support 11A and the left static friction plate support 11B respectively for the right static friction plate 9A, the left static friction plate 9B, the right force sensor 8A and the left force sensor 8B. The right static friction plate 9A and the left static friction plate 9B are both higher than the static friction plate bracket. The outer surfaces of the left and right friction plate brackets 11A and 11B are fitted with the left and right outer positioning balls 12A and 12B in the left and right damper outer cases 6A and 6B without a gap or a slight gap, as shown in fig. 2(B), so that radial and circumferential positioning is accomplished, but flexible movement in the axial direction is possible.
As shown in fig. 4, each of the left and right axial disc-shaped split springs 7A and 7B is provided with a piezoelectric actuator, which can be arranged on one side or both sides of each split spring, and the voltage on the piezoelectric actuator is controlled to control the axial force of the left and right axial disc-shaped split springs on the static friction component, change the axial positive pressure on the two friction pairs, and control the magnitude of the friction force, thereby realizing the active control of adding necessary damping to the rotor system through the elastic support and the vibration and stability of the rotor system.
In order to improve the control accuracy, axial force and shear force sensors 8A and 8B are provided between the left and right static friction plates 9A and 9B and the left and right static friction plate holders 11A and 11B, and the positive pressure on the friction pair between the dynamic friction plates 10A and 10B and the static friction plates 9A and 9B and the generated dry friction force are accurately measured.
During assembly:
when the active elastic ring dry friction damper of the rotor supporting structure of the rotating machinery is driven by a left axial disc-shaped split spring and a right axial disc-shaped split spring with a piezoelectric actuator, the piezoelectric actuator is firstly installed on each split of the axial disc-shaped split spring according to the structural position requirement and connected with an outgoing line of the piezoelectric actuator in parallel. Then, a right dynamic friction plate 10A and a left dynamic friction plate 10B are respectively fixed on two sides of the elastic ring inner ring 3, the outer surfaces of the two dynamic friction plates are kept parallel, and the dynamic friction plates 10A and 10B protrude out of the elastic ring inner ring 3 after installation.
According to the structural position requirement, left and right static friction plates 9A and 9B are respectively fixed on left and right force sensors 8A and 8B, the force sensors are respectively fixed on static friction plate supports 11A and 11B, and after installation, the static friction plates 9A and 9B protrude out of the static friction plate supports 11A and 11B to form left and right static and dynamic friction assemblies. The left and right outer positioning balls 12A and 12B and the lubricating material are installed in the left and right damper housings 6A and 6B according to the structural position requirements, and are simply fixed at the ends. Then, the left and right axial disc-shaped split springs 7A and 7B are installed in the left and right damper casings 6A and 6B as required in the structural position, and the lead wires are fixed.
Assembling the dry friction damper according to the structural position requirement, namely mounting the left static friction component on the inner side of the left damper shell 6B through the left axial disc-shaped split spring 7B according to the requirement; then installing a dynamic friction component; and finally, a right static friction component and a right damper shell 6A with a right axial disc-shaped split spring 7A are installed and fixed on the right side of the right damper shell 6A.
The assembled dry friction damper is debugged, the left and right axially pre-pressed disc-shaped split springs 7A and 7B are in a pre-pressed state by adjusting the voltage on the left and right axially pre-pressed disc-shaped split springs 7A and 7B, and a zero-pressure contact state or a required positive pressure contact state on the friction pair is realized. Finally, the whole dry friction damper housing is fixed on the elastic ring outer ring 5, and the whole dry friction damper assembly is completed.
When vibration and stability of the rotor system need to be controlled through external damping, firstly, the voltage required on the piezoelectric actuator on the axial disc-shaped split spring is determined according to the magnitude of the required dry friction force, so that positive pressure generated on friction pairs of the dynamic friction plates 10A and 10B and the static friction plates 9A and 9B is adjusted, the dry friction force is controlled, and necessary damping is provided for the rotor system. The dry friction force between the dynamic friction plate and the static friction plate can be controlled in real time through the control voltage on the piezoelectric actuator, so that the vibration and the stability of the rotor system can be actively controlled.
The above-described embodiments are intended to illustrate rather than to limit the invention, and any modifications and variations of the present invention are within the spirit of the invention and the scope of the appended claims.
Claims (5)
1. An active elastic ring dry friction damper of a rotary machine rotor supporting structure is characterized by comprising a rotating shaft, a bearing, left and right dynamic friction plates, an elastic ring outer ring, an elastic ring inner ring, a radial spring, left and right static friction plates, left and right force sensors, left and right static friction plate supports, left and right positioning balls and a damper shell; the dynamic friction plate and the elastic ring inner ring form a dynamic friction assembly; the left and right static friction plates, the left and right force sensors and the left and right static friction plate brackets respectively form a left static friction assembly and a right static friction assembly;
the active control mode of the active elastic ring dry friction damper can be realized by matching an electromagnet coil with a C-shaped magnet or a left and right axial disc-shaped split spring with a piezoelectric actuator;
the elastic ring inner ring and the elastic ring outer ring form an elastic ring, the elastic ring is provided with a plurality of annular cylinder sleeves, rectangular bosses are uniformly distributed in an inner-outer staggered mode, bosses on the elastic ring inner ring are called inner bosses, bosses on the elastic ring outer ring are called outer bosses, and an elastic body structure is arranged between the inner bosses and the outer bosses on the circumference of the elastic ring; the axial length of the elastic ring is not less than the outside size of the bearing; the axial length of the boss on the elastic ring is greater than or equal to the width of the bearing;
the left and right dynamic friction plates are respectively fixed on two sides of the inner ring of the elastic ring, the left and right dynamic friction plates protrude out of two sides of the inner ring of the elastic ring, and the inner circular surface of the inner ring of the elastic ring is connected with the rotating shaft through a bearing; the static friction plate is fixed on the force sensor, the force sensor is fixed on the static friction plate bracket, and the static friction plate protrudes out of the static friction plate bracket; certain gaps are reserved between the left and right static friction plates, the outer rings of the left and right force sensors and the left and right static friction plate supports, and the left and right static friction plate supports are matched with positioning balls in the damper shell to complete radial and circumferential positioning.
2. The active elastic ring dry friction damper for rotor supporting structure of rotary machine as claimed in claim 1, wherein said left and right dynamic friction plates and left and right static friction components are symmetrical structure with self-balancing force.
3. The active elastic ring dry friction damper for rotor supporting structure of rotary machine according to claim 1, wherein said dynamic friction plate and said static friction plate are circular rings of equal thickness.
4. The active elastic ring dry friction damper for rotor supporting structure of rotary machine according to claim 1, wherein said dynamic friction plate and static friction plate are fan-shaped or ring-shaped structures with matrix structure.
5. The active elastic ring dry friction damper for rotor support structures of rotating machines of claim 1 wherein said dynamic and static friction plates are made of a combination of steel, copper, powder metallurgy, carbon-carbon composites.
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| CN1657800A (en) * | 2004-12-03 | 2005-08-24 | 西北工业大学 | Method and device for suppression of vibration of rotor system with elastic support |
| CN101275619A (en) * | 2007-03-30 | 2008-10-01 | 西北工业大学 | Electric control device of cartridge branch dry damping device |
| CN104653699A (en) * | 2015-01-22 | 2015-05-27 | 南京航空航天大学 | Vibration reduction device and vibration reduction method for super-critical rotor by using combined type vibration reduction strategy |
| CN105526304A (en) * | 2015-12-02 | 2016-04-27 | 西北工业大学 | Elastic support dry-friction damper with intelligent structure |
| RU2606884C1 (en) * | 2016-01-18 | 2017-01-10 | Олег Савельевич Кочетов | Aseismic building |
| CN105927708A (en) * | 2016-03-24 | 2016-09-07 | 南京航空航天大学 | Rigidity and damping adjustable active vibration reduction support |
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