CN104343874B - A kind of shearing damp vibration damper of rotor and system thereof - Google Patents
A kind of shearing damp vibration damper of rotor and system thereof Download PDFInfo
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- CN104343874B CN104343874B CN201410482456.6A CN201410482456A CN104343874B CN 104343874 B CN104343874 B CN 104343874B CN 201410482456 A CN201410482456 A CN 201410482456A CN 104343874 B CN104343874 B CN 104343874B
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- bearing plate
- force bearing
- vibration damper
- iron core
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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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
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- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of shearing damp vibration damper and system thereof of rotor, wherein, this vibration insulating system comprises DC electrical source, the size of current that DC electrical source is connected for regulating field coil with the field coil on vibration damper iron core; Vibration damper is arranged on Laboratory Furniture, gives stressed of vibration to provide shearing damp by the magnetic fluid in housing; The output shaft of motor is connected with one end of rotating shaft by coupling, the other end of rotating shaft passes the through hole of T-shaped carriage center, rotating shaft is separately installed with current vortex sensor in horizontal and vertical directions, and the vibration displacement signal of two current vortex sensor collections is transferred to computer through conditioning unit and data acquisition unit.The present invention utilizes that the shear yield stress of magnetic fluid is large, power electric is forced down and the feature such as good temperature stability it can be used as the vibration damping of rotating shaft, mechanical system rotor vibration damping field can be used in, the harm that the Oscillation Amplitude of effective reduction rotor thus damping vibration bring, extends machine service life.
Description
Technical field:
The invention belongs to mechanical system rotor antivibration area, be specifically related to a kind of shearing damp vibration damper and system thereof of rotor, it is based on the rheological properties of magnetic fluid, is reduced the vibration of rotor by the way applying extra damping to rotor.
Background technique:
Rotating machinery refers to the machinery such as steam turbine, gas turbine, generator, motor.Its main composition parts have the bearing of rotor, support rotor, stator or machine case, coupling etc.Due to the defect of the structure of rotating machinery and the processing of component and installation aspect, machine is made easily to cause vibration in running.
Vibrate the significant damage brought and very large negative effect is created to national product.Mainly contain sound part to the harm of equipment to rub, sound partial frictional is very easily caused under larger vibration, not only directly cause the damage of sound parts thus, and rotor axial thrust is increased after labyrinth clearance is large, cause thrust bearing shoe temperature to raise, even thrust bearing shoe damage accident can occur.Due to vibration, make some parts produce excessive dynamic stress, thus cause fatigue damage to make some fastening piece fracture occur and get loose.Excessive vibration makes bearing support crack on anchor bolt and some part occur loosen and come off, and loses original function, thus causes unit to have an accident.
Oscillation damping method for different machines is of a great variety.Magnetic fluid is because its shear yield stress is large, power electric is forced down and the feature such as good temperature stability, and the application prospect in vibration damping has attracted to note widely.Easily there is the problems such as magnetic fluid leaks, installation process is not easily located in magnetic fluid vibration damper common at present.
Summary of the invention:
The defect that object of the present invention exists for prior art or deficiency, provide a kind of shearing damp vibration damper and system thereof of rotor, its maximum feature is the symmetry properties of force application part, be convenient to location, working medium is contained in relative on the position that the vertical guide of shaft axis and four of horizontal plane symmetry do not rely on axle to support excessively simultaneously, can not leaking because of vibration, eliminating in null field situation magnetic fluid because of being subject to the adverse effect of gravity to rotor operation, as caused, axle is stressed bends.
For achieving the above object, the present invention is realized by following technical proposals:
A kind of shearing damp vibration damper of rotor, comprise the lower force bearing plate all in I shape and upper force bearing plate, and be symmetricly set on the first side plate and second side plate of this lower force bearing plate and upper force bearing plate both sides, upper force bearing plate is positioned at directly over lower force bearing plate, the center of the first side plate and the second side plate respectively offers a square through hole, and the center of upper force bearing plate offers a square through hole; Second pair of iron core is arranged on the upper-end surface of lower force bearing plate, and this second pair of iron core comprises two symmetrically arranged U-shaped iron cores, is respectively provided with a housing between two end faces of two U-shaped iron cores, and this housing is the hollow cuboid of one end open; T-shaped Bracket setting is between upper force bearing plate and second pair of iron core, the center of this T-shaped support offers for the through hole through rotating shaft, two external parts of T-shaped support transverse direction lay respectively in the square through hole at the first side plate and the second side plate center, the external part of T-shaped support longitudinal direction passes the square through hole at upper force bearing plate center, and crossbeam is arranged on the end face of the external part of T-shaped support longitudinal direction; First pair of iron core is arranged on the upper-end surface of force bearing plate, and this first pair of iron core comprises two symmetrically arranged U-shaped iron cores, is respectively provided with a housing between two end faces of two U-shaped iron cores; One end of two stressed is connected with two external parts of T-shaped support transverse direction respectively, and this other end of two stressed stretches in two housings in the middle of second pair of iron core respectively; Two other one end of stressed is connected with the two ends of crossbeam respectively, this the other end of two stressed stretches in two housings in the middle of first pair of iron core respectively, and be all filled with magnetic fluid in four housings, first pair of iron core and second pair of iron core are all wound with field coil.
The present invention further improves and is: the bottom of lower force bearing plate offers the square groove for being located on Laboratory Furniture.
The present invention further improves and is: lower force bearing plate adopts the positioning block on Laboratory Furniture to be stuck in square groove and locates and be bolted on Laboratory Furniture.
The present invention further improves and is: the material of housing is plexiglass, is formed, its one end open by two and half case bondings, is convenient to inject magnetic fluid.
The present invention further improves and is: upper force bearing plate is made up of aluminium sheet.
The present invention further improves and is: the through hole of T-shaped carriage center is shoulder hole, deep groove ball bearing is provided with in this shoulder hole, and by cover plate, this deep groove ball bearing being closed in the shoulder hole of T-shaped carriage center, during use, the inner ring of deep groove ball bearing is enclosed within rotating shaft.
The present invention further improves and is: adopt saturation magnetic field intensity to be 200G, kinetic viscosity is the magnetic fluid of 4000CP.
The present invention further improves and is: field coil diameter is 0.44mm, and the coiling number of turn is 2000 circles.
A shearing damp vibration insulating system for rotor, comprises DC electrical source, the size of current that DC electrical source is connected for regulating field coil with the field coil on vibration damper iron core, thus regulates the size of resistance; Vibration damper is arranged on Laboratory Furniture, gives stressed of vibration to provide shearing damp by the magnetic fluid in housing; Governing box is used for changing the rotating speed of motor, the output shaft of motor is connected with one end of rotating shaft by coupling, the other end of rotating shaft passes the through hole of T-shaped carriage center, rotating shaft is separately installed with current vortex sensor in horizontal and vertical directions, and the vibration displacement signal of two current vortex sensor collections is transferred to computer through conditioning unit and data acquisition unit.
Compared with prior art, the present invention has following technique effect:
1, whole vibration damper only have support and the crossbeam be fixed on support, stressed be connected with rotating shaft by deep groove ball bearing, remaining heavier part has special supporting portion, greatly reduces the load of axle thus, avoids axle to produce distortion.
2, the symmetrical configuration of whole vibration damper, avoids the appearance of simply supported beam, course of working simple and fast, also effectively can raise the efficiency, shorten the time when staff carries out installation location.
3, vibration insulating system comprises DC electrical source, the size of current that DC electrical source is connected for regulating field coil with the field coil on vibration damper iron core, thus regulates the size of resistance; Vibration damper is arranged on Laboratory Furniture, gives stressed of vibration to provide shearing damp by the magnetic fluid in housing; Governing box is used for changing the rotating speed of motor, the output shaft of motor is connected with one end of rotating shaft by coupling, the other end of rotating shaft passes the through hole of T-shaped carriage center, rotating shaft is separately installed with current vortex sensor in horizontal and vertical directions, the vibration displacement signal of two current vortex sensor collections is transferred to computer through conditioning unit and data acquisition unit, Treatment Analysis is carried out, to evaluate the actual effect of vibration damper for user.
Accompanying drawing illustrates:
Fig. 1 is the structured flowchart of the shearing damp vibration insulating system of a kind of rotor of the present invention;
Fig. 2 is the 3 dimensional drawing of vibration damper of the present invention;
Fig. 3 is the front view of vibration damper of the present invention;
Fig. 4 is the 3 dimensional drawing of T-shaped support;
Fig. 5 is the 3 dimensional drawing of lower force bearing plate;
Fig. 6 is the 3 dimensional drawing of upper force bearing plate;
Fig. 7 is the rumble spectrum figure not adding magnetic field;
Fig. 8 is the rumble spectrum figure after adding magnetic field.
In figure: 1 is lower force bearing plate, 2 is the first side plate, and 3 is the second side plate, and 4 is upper force bearing plate, and 5 is T-shaped support, and 6 is crossbeam, and 7 is first pair of iron core, and 8 is second pair of iron core, and 9 is stressed, and 10 is housing, and 11 is cover plate, and 101 is square groove.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in further details.
As shown in Fig. 2 to 6, the shearing damp vibration damper of a kind of rotor of the present invention, comprise the lower force bearing plate 1 all in I shape and upper force bearing plate 4, and be symmetricly set on the first side plate 2 and the second side plate 3 of this lower force bearing plate 1 and upper force bearing plate 4 both sides, two side plates are responsible for supporting the power along vertical that force bearing plate 4 bears, upper force bearing plate 4 is positioned at directly over lower force bearing plate 1, the center of the first side plate 2 and the second side plate 3 respectively offers a square through hole, and the center of upper force bearing plate 4 offers a square through hole; Second pair of iron core 8 is arranged on the upper-end surface of lower force bearing plate 1, and this second pair of iron core 8 comprises two symmetrically arranged U-shaped iron cores, is respectively provided with a housing 10 between two end faces of two U-shaped iron cores, and this housing 10 is the hollow cuboid of one end open; T-shaped support 5 is arranged between force bearing plate 4 and second pair of iron core 8, the center of this T-shaped support 5 offers for the through hole through rotating shaft, two external parts of T-shaped support 5 transverse direction lay respectively in the square through hole at the first side plate 2 and the second side plate 3 center, the external part of T-shaped support 5 longitudinal direction passes the square through hole at upper force bearing plate 4 center, and crossbeam 6 is arranged on the end face of the external part of T-shaped support 5 longitudinal direction; First pair of iron core 7 is arranged on the upper-end surface of force bearing plate 4, and this first pair of iron core 7 comprises two symmetrically arranged U-shaped iron cores, is respectively provided with a housing 10 between two end faces of two U-shaped iron cores; One end of two stressed 9 is connected with two external parts of T-shaped support 5 transverse direction respectively, this the other end of two stressed 9 stretches in two housings 10 in the middle of second pair of iron core 8 respectively, certain space is had with the four sides of housing 10, stressed 9 is made fully to contact with magnetic fluid, like this when vibration passing to when stressed 9 can not directly and housing 10 collide, and surround the damping force producing and need because of full magnetic fluid; Two other one end of stressed 9 is connected with the two ends of crossbeam 6 respectively, this the other end of two stressed 9 stretches in two housings 10 in the middle of first pair of iron core 7 respectively, certain space is had with the four sides of housing 10, stressed 9 is made fully to contact with magnetic fluid, like this when vibration passing to when stressed 9 can not directly and housing 10 collide, and surround the damping force producing and need because of full magnetic fluid, first pair of iron core 7 and second pair of iron core 8 are all wound with field coil.
Further, the bottom of lower force bearing plate 1 offers the square groove 101 for being located on Laboratory Furniture.During use, lower force bearing plate 1 adopts the positioning block on Laboratory Furniture to be stuck in square groove 101 and locates and be bolted on Laboratory Furniture.
Further, the material of housing 10 is plexiglass, is formed, its one end open by two and half case bondings, is convenient to inject magnetic fluid.Upper force bearing plate 4 is made up of aluminium sheet.
Further, the through hole at T-shaped support 5 center is shoulder hole, is provided with deep groove ball bearing in this shoulder hole, and is closed in the shoulder hole at T-shaped support 5 center by this deep groove ball bearing by cover plate 11, and during use, the inner ring of deep groove ball bearing is enclosed within rotating shaft.T-shaped support 5 is connected with rotating shaft by deep groove ball bearing, even transmitting vibrations and do not cause axle vibrate time cause damper structure to occur fatigue crack.
As shown in Figure 1, the shearing damp vibration insulating system of a kind of rotor of the present invention, comprises DC electrical source, the size of current that DC electrical source is connected for regulating field coil with the field coil on vibration damper iron core, thus regulates the size of resistance; Vibration damper is arranged on Laboratory Furniture, gives stressed 9 of vibration to provide shearing damp by the magnetic fluid in housing 10; Governing box is used for changing the rotating speed of motor, the output shaft of motor is connected with one end of rotating shaft by coupling, the other end of rotating shaft passes the through hole at T-shaped support 5 center, rotating shaft is separately installed with current vortex sensor in horizontal and vertical directions, the vibration displacement signal of two current vortex sensor collections is transferred to computer through conditioning unit and data acquisition unit, Treatment Analysis is carried out, to evaluate the actual effect of vibration damper for user.
Utilizing the rheological properties of magnetic fluid to provide the function of damping to rotating shaft for realizing the present invention, the magnetic fluid of different parameters can be adopted according to the Vibration Condition of rotating shaft.Adopt saturation magnetic field intensity to be 200G in the present invention, kinetic viscosity is the magnetic fluid of 4000CP.Field coil diameter is 0.44mm, and coiling number of turn number is 2000 circles.Different magnetic fluids and coil turn can be selected according to actual needs.
In order to understand further the present invention, now an explanation is done to principle of the present invention:
Magnetic fluid is under magnetic fields, and huge change can occur the apparent viscosity of fluid, even in magnetic field is strong, can be subject to the shearing damp effect from magnetic fluid in the process of motion.Magnetic intensity can be changed by regulating the size of current of field coil, thus change stressed 9 resistance be subject to.
As shown in Figure 7 and Figure 8, Fig. 7 is the rumble spectrum figure carrying out when verification experimental verification does not add magnetic field to the present invention, and its power frequency vibration amplitude is 363.09.Fig. 8 is that the present invention carries out verifying the spectrogram after applying magnetic field, and its power frequency vibration amplitude is 275.86.
Can see from above-mentioned test result, applying the more original vibration of magnetic fluid shearing damp after vibration response has had and has comparatively significantly reduced, and the amplitude of vibration have dropped 24%.Test shows, the present invention can reduce the vibration of rotor effectively.
Above content is in conjunction with concrete experimental condition further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination scope of patent protection.
Claims (9)
1. the shearing damp vibration damper of a rotor, it is characterized in that: comprise the lower force bearing plate (1) all in I shape and upper force bearing plate (4), and be symmetricly set on the first side plate (2) and second side plate (3) of this lower force bearing plate (1) and upper force bearing plate (4) both sides, upper force bearing plate (4) is positioned at directly over lower force bearing plate (1), the center of the first side plate (2) and the second side plate (3) respectively offers a square through hole, and the center of upper force bearing plate (4) offers a square through hole; Second pair of iron core (8) is arranged on the upper-end surface of lower force bearing plate (1), this second pair of iron core (8) comprises two symmetrically arranged U-shaped iron cores, a housing (10) is respectively provided with, the hollow cuboid that this housing (10) is one end open between two end faces of two U-shaped iron cores; T-shaped support (5) is arranged between force bearing plate (4) and second pair of iron core (8), the center of this T-shaped support (5) offers for the through hole through rotating shaft, two external parts of T-shaped support (5) transverse direction lay respectively in the square through hole at the first side plate (2) and the second side plate (3) center, the external part of T-shaped support (5) longitudinal direction passes the square through hole at upper force bearing plate (4) center, and crossbeam (6) is arranged on the end face of the longitudinal external part of T-shaped support (5); First pair of iron core (7) is arranged on the upper-end surface of force bearing plate (4), this first pair of iron core (7) comprises two symmetrically arranged U-shaped iron cores, is respectively provided with a housing (10) between two end faces of two U-shaped iron cores; Two external parts that the one end of two stressed (9) is horizontal with T-shaped support (5) are respectively connected, and the other end of these two stressed (9) stretches in two housings (10) in the middle of second pair of iron core (8) respectively; The one end of two other stressed (9) is connected with the two ends of crossbeam (6) respectively, the other end of these two stressed (9) stretches in two housings (10) in the middle of first pair of iron core (7) respectively, and be all filled with magnetic fluid in four stressed (9) corresponding four housings (10), first pair of iron core (7) and second pair of iron core (8) are all wound with field coil.
2. the shearing damp vibration damper of a kind of rotor according to claim 1, is characterized in that: the bottom of lower force bearing plate (1) offers the square groove (101) for being located on Laboratory Furniture.
3. the shearing damp vibration damper of a kind of rotor according to claim 2, is characterized in that: lower force bearing plate (1) adopts the positioning block on Laboratory Furniture to be stuck in square groove (101) and locates and be bolted on Laboratory Furniture.
4. the shearing damp vibration damper of a kind of rotor according to claim 1, is characterized in that: the material of housing (10) is plexiglass, is formed, its one end open by two and half case bondings, is convenient to inject magnetic fluid.
5. the shearing damp vibration damper of a kind of rotor according to claim 1, is characterized in that: upper force bearing plate (4) is made up of aluminium sheet.
6. the shearing damp vibration damper of a kind of rotor according to claim 1, it is characterized in that: the through hole at T-shaped support (5) center is shoulder hole, deep groove ball bearing is provided with in this shoulder hole, and by cover plate (11), this deep groove ball bearing is closed in the shoulder hole at T-shaped support (5) center, during use, the inner ring of deep groove ball bearing is enclosed within rotating shaft.
7. the shearing damp vibration damper of a kind of rotor according to claim 1, is characterized in that: adopt saturation magnetic field intensity to be 200G, kinetic viscosity is the magnetic fluid of 4000CP.
8. the shearing damp vibration damper of a kind of rotor according to claim 1, is characterized in that: field coil diameter is 0.44mm, and the coiling number of turn is 2000 circles.
9. the shearing damp vibration insulating system of a rotor, it is characterized in that, this vibration insulating system adopts the vibration damper according to any one of claim 1 to 8, comprise DC electrical source, the size of current that DC electrical source is connected for regulating field coil with the field coil on vibration damper iron core, thus the size regulating resistance; Vibration damper is arranged on Laboratory Furniture, provides shearing damp to stressed (9) of vibration by the magnetic fluid in housing (10); Governing box is used for changing the rotating speed of motor, the output shaft of motor is connected with one end of rotating shaft by coupling, the other end of rotating shaft passes the through hole at T-shaped support (5) center, rotating shaft is separately installed with current vortex sensor in horizontal and vertical directions, and the vibration displacement signal of two current vortex sensor collections is transferred to computer through conditioning unit and data acquisition unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410482456.6A CN104343874B (en) | 2014-09-19 | 2014-09-19 | A kind of shearing damp vibration damper of rotor and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410482456.6A CN104343874B (en) | 2014-09-19 | 2014-09-19 | A kind of shearing damp vibration damper of rotor and system thereof |
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| CN104343874A CN104343874A (en) | 2015-02-11 |
| CN104343874B true CN104343874B (en) | 2016-03-30 |
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| CN105108583B (en) * | 2015-05-29 | 2017-08-11 | 哈尔滨理工大学 | Based on vibration isolation type electric vortex sensor measuring dynamic milling power apparatus and measuring method |
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| JPH10196713A (en) * | 1997-01-16 | 1998-07-31 | N H K Eng Service | Vibration control device for television camera |
| US6129185A (en) * | 1997-12-30 | 2000-10-10 | Honeywell International Inc. | Magnetically destiffened viscous fluid damper |
| CN201733191U (en) * | 2010-06-25 | 2011-02-02 | 河北省电力建设第一工程公司 | Bearing base for installing motor rotor |
| CN102022472B (en) * | 2010-12-23 | 2012-08-22 | 上海应用技术学院 | Rotary foam metal magnetorheological fluid damper |
| CN103161861A (en) * | 2013-04-10 | 2013-06-19 | 王夜辉 | Electromagnetic anti-vibration apparatus |
| CN203362934U (en) * | 2013-07-23 | 2013-12-25 | 山东科技大学 | Active control electromagnetic damper for rotor vibration |
| CN203770500U (en) * | 2014-02-28 | 2014-08-13 | 同济大学 | Self-control electromagnetic damper |
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