CN104848990B - A kind of ultraprecise dynamic poise device suitable for miniature rotor - Google Patents
A kind of ultraprecise dynamic poise device suitable for miniature rotor Download PDFInfo
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- CN104848990B CN104848990B CN201510266284.3A CN201510266284A CN104848990B CN 104848990 B CN104848990 B CN 104848990B CN 201510266284 A CN201510266284 A CN 201510266284A CN 104848990 B CN104848990 B CN 104848990B
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- 238000004458 analytical method Methods 0.000 claims description 2
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Abstract
The invention discloses a kind of ultraprecise dynamic poise device suitable for miniature rotor, and part is monitored comprising device fixed part, Rotor carriage part, rotor drive mechanism part and unbalance vibration.The support frame fixed frame of device fixed part can be slided on guide rail, and the base for installing guide rail is fixed on bottom plate；The amplification of faint unbalance vibration can be achieved in Rotor carriage part, and can be divided into two kinds of supporting construction forms according to different vibration magnification ratios；The motor of rotor drive mechanism part can drive unbalanced rotor to rotate by belt transmissioning mode；Unbalance vibration monitoring part obtains rotor unbalance vibration amplitude and phase respectively by displacement transducer, phase demodulation sensor.Compared with traditional dynamic poise device, apparatus structure involved in the present invention is simple, small volume, high to the measurement accuracy of faint unbalance vibration, is more suitable for the ultraprecise dynamic balancing of miniature rotor.
Description
Technical field
The present invention relates to a kind of rotor dynamic balancing device, more particularly to a kind of ultraprecise dynamic balancing suitable for miniature rotor
Device.
Background technology
Imbalance is to cause the principal element of slewing vibration, and small imbalance can also cause high vibration under high speed,
The control of rotor unbalance residual content just only be can guarantee that into the safe and reliable operation of slewing in small scope.Therefore, state
Inside and outside enterprise, research institution have carried out years of researches how entering action balance to rotor, and achieve good dynamic balancing
Effect.However, with the development of industrial technology, industrial products are miniaturized increasingly, precise treatment, the processing detection to key components and parts
Performance it is also proposed new requirement.
The used most rotation axial workpieces for normal size of traditional dynamic balancing machine are tested in the market,
But for lighter weight (quality is less than 0.5kg), the Miniature precision rotor of small volume (diameter is less than 3cm), it tends to be difficult to reach
To preferable required precision.Traditional mechanism generally use spring damping form measurement amount of unbalance, the processed complex of such mechanism,
Precision modulability is poor.
The content of the invention
The shortcomings that it is an object of the invention to overcome above-mentioned prior art, there is provided a kind of simple in construction, small volume, to micro-
The high ultraprecise dynamic poise device suitable for miniature rotor of the measurement accuracy of weak unbalance vibration.
To achieve the above objectives, the technical solution adopted by the present invention is：A kind of ultraprecise suitable for miniature rotor is dynamic flat
Weighed device, including bottom plate, in addition to device fixed part, Rotor carriage part, rotor drive mechanism part and imbalance are shaken
Dynamic monitoring part；
Described device fixed part includes rotor, base, guide rail, support frame fixed frame；Wherein support frame fixed frame with
It is fixed between the base on bottom plate and is slidably connected, and can realizes that position of the support frame fixed frame on base is fixed；
Described Rotor carriage part, which is provided in support frame fixed frame, is used to realize that rotor vibration displacement to amplify work(
The unbalance vibration support frame of energy；The both ends of the rotor are set up on one group of roller respectively, and the roller is fixed on imbalance
Vibrate on support frame, roller is rotated by contacting rotor driven with rotor rolling friction；
Described rotor drive mechanism part includes pulley one, belt one, belt two, belt transmission support and motor,
Connecting belt two between motor and pulley one, connecting belt one between pulley one and pulley two, pulley two and the axis of pulley one
It is parallel to each other；Rolling friction contacts between belt one and rotor；
Described unbalance vibration monitoring portion point includes displacement transducer and phase demodulation biography in support frame fixed frame
Sensor.
Above-mentioned unbalance vibration support frame is bilateral symmetry, to realize rotor vibration displacement two level enlarging function,
The unbalance vibration support frame includes horizontally disposed second rigid rod, the 3rd rigid rod that vertical direction is set, positioned at the 3rd
The 5th rigid rod, the 4th rigid rod, the 6th rigid rod, the 7th rigid rod, the first well of horizontal positioned setting below rigid rod
Font Stiff Block and the first rigid rod；Wherein roller is coupled with the first intersecting parallels Stiff Block by smooth hinge, the second rigidity
Bar left and right horizontal is set, and is coupled with support frame fixed frame by smooth hinge, and the 4th rigid rod is fixed with support frame fixed frame to be joined
Connect, between the first intersecting parallels Stiff Block and the first rigid rod, between the first rigid rod and the second rigid rod, the second rigid rod and
Between three rigid rods, between the 3rd rigid rod and the 5th rigid rod, between the 4th rigid rod and the 5th rigid rod, the 5th rigid rod
Coupled respectively by flexible hinge between the 6th rigid rod and between the 6th rigid rod between the 7th rigid rod；Institute's rheme
Displacement sensor is located at the lower section of the 7th rigid rod.
Above-mentioned unbalance vibration support frame is bilateral symmetry, to realize rotor vibration displacement level Four enlarging function,
The unbalance vibration support frame includes the 9th rigid rod, the tenth rigid rod, the 11st rigid rod, the 12nd rigid rod, the 13rd
Rigid rod, the 14th rigid rod, the 15th rigid rod, the 16th rigid rod, the 17th rigid rod, the 18th rigid rod, the tenth
Nine rigid rods and the 20th rigid rod；Wherein roller is coupled with the second intersecting parallels Stiff Block by smooth hinge, the 9th rigidity
Bar is coupled with support frame fixed frame by smooth hinge, and the 11st rigid rod, the 17th rigid rod and support frame fixed frame are fixed
Connection, the 15th rigid rod be located at below the second intersecting parallels Stiff Block, are fixedly connected with support frame fixed frame, the 8th rigid rod and
Between second intersecting parallels Stiff Block, between the 9th rigid rod and the 8th rigid rod, between the tenth rigid rod and the 9th rigid rod,
Between 12 rigid rods and the tenth rigid rod, between the 12nd rigid rod and the 11st rigid rod, the 13rd rigid rod and the tenth
Between two rigid rods, between the 14th rigid rod and the 13rd rigid rod, between the 16th rigid rod and the 14th rigid rod,
Between 18 rigid rods and the 16th rigid rod, between the 18th rigid rod and the 17th rigid rod, the 19th rigid rod and
Coupled respectively by flexible hinge between 18 rigid rods and between the 20th rigid rod and the 19th rigid rod；Wherein second
Ten rigid rods are horizontally disposed with, and institute's displacement sensors are located at the lower section of the 20th rigid rod.
Above-mentioned support frame fixed frame and relative slip is fixed between the base on bottom plate, and support frame can be realized
Position of the fixed frame on base is fixed, and its concrete structure is：Support frame fixed frame is slidably connected with guide rail, and support frame is fixed
Frame can be fixed on guide rail by pin.
Above-mentioned displacement transducer is fixedly connected with support frame fixed frame.
The 15th above-mentioned rigid rod is fixed by threaded connection with support frame fixed frame.
Beneficial effects of the present invention：Compared with existing apparatus, the present invention has advantages below：
1. the present invention is met miniature by devising the new unbalanced rotor support frame based on flexure hinge mechanism
The measurement by magnification demand of the faint unbalance vibration of rotor；
2. simple in construction be easy to process, be conveniently adjusted to meet different type rotor demand；
3. being in tension state under whole mechanism working condition, the drawbacks of compliant mechanism compression is unstable is avoided, is had
Effect enhances the stability of system.
For a clearer understanding of the present invention, below in conjunction with accompanying drawing, the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the structural representation of the vibration support frame for realizing two level enlarging function of the present invention；
Fig. 3 is the structural representation of the vibration support frame for realizing level Four enlarging function of the present invention.
The description of symbols of accompanying drawing 1：1st, bottom plate；2nd, base；3rd, support frame fixed frame；4th, rotor；5th, guide rail 6, motor；7th, belt
One；8th, belt two；9th, pulley one；10th, belt transmission support；11st, phase demodulation sensor；12nd, pulley two；13rd, roller；14th, first
Intersecting parallels Stiff Block；15th, the first rigid rod；16th, the second rigid rod；17th, the 3rd rigid rod；18th, the 4th rigid rod；19th, the 5th
Rigid rod；20th, the 6th rigid rod；21st, the 7th rigid rod；22nd, displacement transducer；23rd, the second intersecting parallels Stiff Block；24th, the 8th
Rigid rod；25th, the 9th rigid rod；26th, the tenth rigid rod；27th, the 11st rigid rod；28th, the 12nd rigid rod；29th, the ten three
Rigid rod；30th, the 14th rigid rod；31st, the 15th rigid rod；32nd, the 16th rigid rod；33rd, the 17th rigid rod；34th,
18 rigid rods；35th, the 19th rigid rod；36th, the 20th rigid rod.
Embodiment
Embodiment 1：
The invention provides a kind of ultraprecise dynamic poise device suitable for miniature rotor as shown in Figure 1, including bottom plate
1, in addition to device fixed part, Rotor carriage part, rotor drive mechanism part and unbalance vibration monitoring part；
Described device fixed part includes rotor 4, base 2, guide rail 5, support frame fixed frame 3；Wherein support frame is fixed
It is slidably connected between frame 3 and the base 2 being fixed on bottom plate 1, and position of the support frame fixed frame 3 on base 2 can be realized
Fixation is put, specifically support frame fixed frame can be fixed on guide rail by pin.
Described Rotor carriage part, which is provided in support frame fixed frame 3, is used to realize that rotor vibration displacement to amplify work(
The unbalance vibration support frame of energy；The both ends of the rotor 4 are set up on one group of roller 13 respectively, and the roller 13 is fixed on not
On balance vibration support frame, roller 13 is rotated by contacting rotor driven 4 with the rolling friction of rotor 4.
Described rotor drive mechanism part includes pulley 1, belt 1, belt 28, belt transmission support 10 and electricity
Motivation 6, connecting belt 28 between motor 6 and pulley 1, connecting belt 1 between pulley 1 and pulley 2 12, pulley two
12 are parallel to each other with the axis of pulley 1；Rolling friction contacts between belt 1 and rotor 4；
Described unbalance vibration monitoring portion point includes displacement transducer 22 and phase demodulation in support frame fixed frame 3
Sensor 11；Displacement transducer 22 is fixedly connected with support frame fixed frame 3.
As shown in figure 1, the unbalance vibration support frame of the present invention is bilateral symmetry, two support frames in Fig. 1
A set of, the enlarging function of achievable rotor vibration displacement is each provided with fixed frame 3.Support frame has two kinds of structure types, can divide
The function of displacement amplification of different stage is not realized.
As shown in Fig. 2 when realizing displacement two level enlarging function, the concrete structure of the unbalance vibration support frame is：Should
Unbalance vibration support frame includes horizontally disposed second rigid rod 16, the 3rd rigid rod 17 that vertical direction is set, positioned at the
5th rigid rod 19 of the lower section of three rigid rod 17, the 4th rigid rod 18, the 6th rigid rod 20, the 7th rigidity of horizontal positioned setting
Bar 21, the first intersecting parallels Stiff Block 14 and the first rigid rod 15；The wherein intersecting parallels Stiff Block 14 of roller 13 and first passes through light
Sliding hinge-coupled, the left and right horizontal of the second rigid rod 16 set, coupled with support frame fixed frame 3 by smooth hinge, the 4th rigidity
Bar 18 is fixedly connected with support frame fixed frame 3, between the first intersecting parallels Stiff Block 14 and the first rigid rod 15, the first rigid rod 15
Between the second rigid rod 16, between the second rigid rod 16 and the 3rd rigid rod 17, the 3rd rigid rod 17 and the 5th rigid rod 19
Between, between the 4th rigid rod 18 and the 5th rigid rod 19, between the 5th rigid rod 19 and the 6th rigid rod 20 and the 6th is firm
Coupled respectively by flexible hinge between the 7th rigid rod 21 between property bar 20；Institute's displacement sensors 22 are located at the 7th rigidity
The lower section of bar 21.
As shown in figure 3, when realizing displacement level Four enlarging function, the unbalance vibration support frame is similarly symmetrical knot
Structure, a set of, the now concrete structure of the unbalance vibration support frame is each provided with two support frame fixed frames 3 in Fig. 1
It is：The unbalance vibration support frame includes the 9th rigid rod 25, the tenth rigid rod 26, the rigidity of the 11st rigid rod the 27, the 12nd
Bar 28, the 13rd rigid rod 29, the 14th rigid rod 30, the 15th rigid rod 31, the 16th rigid rod 32, the 17th rigid rod
33rd, the 18th rigid rod 34, the 19th rigid rod 35 and the 20th rigid rod 36；The wherein intersecting parallels of roller 13 and second rigidity
Block 23 is coupled by smooth hinge, and the 9th rigid rod 25 is coupled with support frame fixed frame 3 by smooth hinge, the 11st rigid rod
27th, the 17th rigid rod 33 is fixedly connected with support frame fixed frame 3, and the 15th rigid rod 31 is located at the second intersecting parallels Stiff Block 23
Lower section, it is fixedly connected with support frame fixed frame 3, especially by the connection that is screwed.8th rigid rod 24 and the second intersecting parallels are firm
Between property block 23, between the 9th rigid rod 25 and the 8th rigid rod 24, between the tenth rigid rod 26 and the 9th rigid rod 25, the tenth
Between two rigid rods 28 and the tenth rigid rod 26, between the 12nd rigid rod 28 and the 11st rigid rod 27, the 13rd rigid rod
Between 29 and the 12nd rigid rod 28, between the 14th rigid rod 30 and the 13rd rigid rod 29, the 16th rigid rod 32 and
Between 14 rigid rods 30, between the 18th rigid rod 34 and the 16th rigid rod 32, the 18th rigid rod 34 and the 17th firm
Between property bar 33, between the 19th rigid rod 35 and the 18th rigid rod 34 and the 20th rigid rod 36 and the 19th rigid rod
Coupled respectively by flexible hinge between 35；Wherein the 20th rigid rod 36 is horizontally disposed, and institute's displacement sensors 22 are located at the
The lower section of 20 rigid rods 36.
It following present specific implementation process of the present invention in engineering practice：
1. structure is installed and fixed
Base 2 is placed on bottom plate 1, and is bolted, there is guide rail base both sides, and support frame is engaged with guide rail,
When it is determined that rotor to be measured length when, X-direction adjust left and right sidesing supporting frame fixed frame between distance, the position of left and right sidesing supporting frame
Also determine therewith, and positioned and fixed by positioning hole；Rotor vibration displacement enlarger is placed in support frame fixed frame, ready to balance
Rotor is placed on the roller above support frame；Motor is fixedly connected with bottom plate 1, passes through second belt transmission turning motor
It is dynamic to be transferred to ready to balance rotor, it can adjust height with the size of ready to balance rotor along Z-direction with the belt of rotor rolling friction
Degree；
2. dynamic balancing detects
1) when detecting the amount of unbalance of ready to balance rotor, motor is rotated, driving ready to balance is driven by second belt
Rotor is rotated, and unbalance vibration response will be exaggerated by compliant mechanism and pass to displacement transducer；
2) rotor oscillation start-phase is obtained by phase demodulation sensor, obtaining rotor unbalance by displacement transducer vibrates
Response, and then data transfer is to control computer, data acquisition, analysis and uneven calculating.
To sum up, compared with existing apparatus, the present invention has advantages below：
1. the present invention is met miniature by devising the new unbalanced rotor support frame based on flexure hinge mechanism
The measurement by magnification demand of the faint unbalance vibration of rotor；
2. apparatus structure of the present invention is simple, easy to process, and can adjust multiplication factor to meet that different type turns
Sub- demand；
3. the flexible link in whole mechanism is all in tension state in the operating condition, avoids compliant mechanism and be pressurized not
The drawbacks of stable, effectively enhance the stability of system.
Part, technique and letter that embodiment does not describe in detail represent the well-known components and conventional means of the category industry
And general knowledge, do not describe one by one here.Exemplified as above is only for example, not forming the protection to the present invention to the present invention's
The limitation of scope, it is every to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (4)
1. a kind of ultraprecise dynamic poise device suitable for miniature rotor, including bottom plate (1), it is characterised in that：Also include device
Fixed part, Rotor carriage part, rotor drive mechanism part and unbalance vibration monitoring part；Described device fixed part
Dividing includes rotor (4), base (2), guide rail (5), support frame fixed frame (3)；Wherein support frame fixed frame (3) is with being fixed on bottom
It is slidably connected between base (2) on plate (1), and position of the support frame fixed frame (3) on base (2) can be realized
It is fixed；Described Rotor carriage part, which is provided in support frame fixed frame (3), is used to realize that rotor vibration displacement to amplify work(
The unbalance vibration support frame of energy；The both ends of the rotor (4) are set up on one group of roller (13) respectively, the roller (13)
It is fixed on unbalance vibration support frame, roller (13) is rotated by contacting rotor driven (4) with rotor (4) rolling friction；
Described rotor drive mechanism part includes pulley one (9), belt one (7), belt two (8), belt transmission support (10) and electricity
Motivation (6), connecting belt two (8) between motor (6) and pulley one (9), joins between pulley one (9) and pulley two (12)
Lace one (7), pulley two (12) are parallel to each other with pulley one (9) axis；Rolled between belt one (7) and rotor (4)
CONTACT WITH FRICTION；Described unbalance vibration monitoring portion point includes the displacement transducer (22) in support frame fixed frame (3)
And phase demodulation sensor (11)；The unbalance vibration support frame is bilateral symmetry, to realize rotor vibration displacement two
Level enlarging function, the unbalance vibration support frame include horizontally disposed second rigid rod (16), the 3rd that vertical direction is set
Rigid rod (17), the 5th rigid rod (19) below the 3rd rigid rod (17), the 4th rigid rod (18), the 6th rigid rod
(20), the 7th rigid rod (21) of horizontal positioned setting, the first intersecting parallels Stiff Block (14) and the first rigid rod (15)；Its
Middle roller (13) is coupled with the first intersecting parallels Stiff Block (14) by smooth hinge, and the second rigid rod (16) left and right horizontal is set
Put, coupled with support frame fixed frame (3) by smooth hinge, the 4th rigid rod (18) and the fixed connection of support frame fixed frame (3)
Connect, between the first intersecting parallels Stiff Block (14) and the first rigid rod (15), the first rigid rod (15) and the second rigid rod (16)
Between, between the second rigid rod (16) and the 3rd rigid rod (17), the 3rd rigid rod (17) and the 5th rigid rod (19) it
Between, between the 4th rigid rod (18) and the 5th rigid rod (19), between the 5th rigid rod (19) and the 6th rigid rod (20)
And the 6th coupled by flexible hinge between rigid rod (20) respectively between the 7th rigid rod (21)；The displacement sensing
Device (22) is located at the lower section of the 7th rigid rod (21)；The unbalance vibration support frame is bilateral symmetry, to realize
Rotor vibration displacement level Four enlarging function, the unbalance vibration support frame include the 9th rigid rod (25), the tenth rigid rod (26),
It is 11st rigid rod (27), the 12nd rigid rod (28), the 13rd rigid rod (29), the 14th rigid rod (30), the 15th firm
Property bar (31), the 16th rigid rod (32), the 17th rigid rod (33), the 18th rigid rod (34), the 19th rigid rod (35)
And the 20th rigid rod (36)；Wherein roller (13) is coupled with the second intersecting parallels Stiff Block (23) by smooth hinge, the
Nine rigid rods (25) are coupled with support frame fixed frame (3) by smooth hinge, the 11st rigid rod (27), the 17th rigid rod
(33) it is fixedly connected with support frame fixed frame (3), the 15th rigid rod (31) is located under the second intersecting parallels Stiff Block (23)
Side, is fixedly connected with support frame fixed frame (3), between the 8th rigid rod (24) and the second intersecting parallels Stiff Block (23), the 9th
Between rigid rod (25) and the 8th rigid rod (24), between the tenth rigid rod (26) and the 9th rigid rod (25), the 12nd
Between rigid rod (28) and the tenth rigid rod (26), between the 12nd rigid rod (28) and the 11st rigid rod (27),
Between 13 rigid rods (29) and the 12nd rigid rod (28), the 14th rigid rod (30) and the 13rd rigid rod (29) it
Between, between the 16th rigid rod (32) and the 14th rigid rod (30), the 18th rigid rod (34) and the 16th rigid rod
(32) between, between the 18th rigid rod (34) and the 17th rigid rod (33), the 19th rigid rod (35) and the 18th
Joined respectively by flexible hinge between rigid rod (34) and between the 20th rigid rod (36) and the 19th rigid rod (35)
Connect；Wherein the 20th rigid rod (36) is horizontally disposed, and institute's displacement sensors (22) are located under the 20th rigid rod (36)
Side；
The specific implementation process of the device：
Structure is installed and fixed
Base is placed on bottom plate, and is bolted, there is guide rail base both sides, and support frame is engaged with guide rail,
When it is determined that rotor to be measured length when, X directions adjust left and right sidesing supporting frame fixed frame between distance, left and right sidesing supporting frame
Position also determine therewith, and pass through positioning hole positioning fix；Rotor vibration displacement enlarger is placed in support frame fixed frame,
Ready to balance rotor is placed on the roller above support frame；Motor is fixedly connected with bottom plate (1), and being driven by second belt will
The rotation of motor is transferred to ready to balance rotor, and the belt with rotor rolling friction can be along Z directions with the big of ready to balance rotor
It is small and adjust height；
Dynamic balancing detects
1) when detecting the amount of unbalance of ready to balance rotor, motor is rotated, driving ready to balance rotor is driven by second belt
Rotate, unbalance vibration response will be exaggerated by compliant mechanism and pass to displacement transducer；
2) rotor oscillation start-phase is obtained by phase demodulation sensor, obtaining rotor unbalance vibration by displacement transducer rings
Should, and then data transfer is to control computer, data acquisition, analysis and uneven calculating.
A kind of 2. ultraprecise dynamic poise device suitable for miniature rotor as described in claim 1, it is characterised in that：It is described
Support frame fixed frame (3) and the base (2) that is fixed on bottom plate (1) between it is relative slide, and support frame can be realized
Position of the fixed frame (3) on base (2) is fixed, and its concrete structure is：Support frame fixed frame is slidably connected with guide rail, and props up
Support fixed frame can be fixed on guide rail by pin.
A kind of 3. ultraprecise dynamic poise device suitable for miniature rotor as described in claim 1, it is characterised in that：It is described
Displacement transducer (22) be fixedly connected with support frame fixed frame (3).
A kind of 4. ultraprecise dynamic poise device suitable for miniature rotor as described in claim 1, it is characterised in that：It is described
The 15th rigid rod (31) be fixed by threaded connection with support frame fixed frame (3).
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| CN201510266284.3A CN104848990B (en) | 2015-05-22 | 2015-05-22 | A kind of ultraprecise dynamic poise device suitable for miniature rotor |
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| CN201510266284.3A CN104848990B (en) | 2015-05-22 | 2015-05-22 | A kind of ultraprecise dynamic poise device suitable for miniature rotor |
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| CN104848990B true CN104848990B (en) | 2018-01-16 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571783B (en) * | 2016-01-12 | 2018-01-02 | 西安电子科技大学 | A kind of rotor high accuracy dynamic poise device based on differential type capacitance sensing principle |
| JP6692181B2 (en) | 2016-02-29 | 2020-05-13 | 国際計測器株式会社 | Dynamic balance test equipment |
| CN105865714B (en) * | 2016-03-31 | 2018-02-09 | 西安电子科技大学 | A kind of rotor unbalance measurement apparatus based on grating scale feedback signal |
| CN107270843B (en) * | 2017-07-31 | 2020-10-27 | 中核(天津)科技发展有限公司 | Balancing machine based on cavity type positioning in string support and detection method |
| CN107228643B (en) * | 2017-07-31 | 2020-10-27 | 中核(天津)科技发展有限公司 | Chord support inner cavity type cylindrical part positioning device and positioning method |
| CN108827539B (en) * | 2018-03-30 | 2020-02-21 | 江苏大学 | Online dynamic balance test device for multi-rotor assembly |
| CN111168244B (en) * | 2020-01-08 | 2021-02-02 | 西安交通大学 | Double-sided online de-weighting dynamic balance system of ultra-precise flexible rotor |
| CN114878076B (en) * | 2022-07-11 | 2022-09-09 | 日照朝力信息科技有限公司 | Dynamic balance testing device of flexible rotor |
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