CN106525336A - Rotor system unbalanced quantitative measurement system based on magnetorheological fluid and measurement method - Google Patents
Rotor system unbalanced quantitative measurement system based on magnetorheological fluid and measurement method Download PDFInfo
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- CN106525336A CN106525336A CN201610968118.2A CN201610968118A CN106525336A CN 106525336 A CN106525336 A CN 106525336A CN 201610968118 A CN201610968118 A CN 201610968118A CN 106525336 A CN106525336 A CN 106525336A
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- coil
- rotor
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- unbalance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining unbalance
- G01M1/16—Determining unbalance by oscillating or rotating the body to be tested
- G01M1/20—Determining unbalance by oscillating or rotating the body to be tested and applying external forces compensating forces due to unbalance
Abstract
The invention discloses a rotor system unbalanced quantitative measurement system based on a magnetorheological fluid and a measurement method, which belongs to the field of rotating machinery rotor dynamic balance. The measurement system comprises a magnetic fluid ring, a piezoelectric pressure sensor, a preamplifier, a data collector, a computer, a controller and a D/A converter. The piezoelectric pressure sensor is connected with the input end of the preamplifier. The output end of the preamplifier is connected with the input end of the data collector. The output end of the data collector is connected with the computer. The computer is connected with the controller. The controller is connected with the D/A converter. The D/A converter outputs current to the magnetic fluid ring through a wire. The piezoelectric pressure sensor is arranged above the turntable of a rotor system. The magnetic fluid ring is arranged on the surface of the turntable. The center of the magnetic fluid ring is coincident with the center of the turntable. The measurement method has the advantages of simple use and high efficiency, and can be used to determine unbalance and unbalanced positions of a rotor at one time. The measurement system has the advantages of small size and light weight, and can be applied to various types of rotor systems.
Description
Technical field
The invention belongs to rotary machine rotor dynamic balancing technique field, more particularly to a kind of rotor system based on magnetic flow liquid
System amount of unbalance quantitative measurement system and measuring method.
Background technology
Key and basic technology of the dynamic balancing technique as rotating machinery, is constantly subjected to the close of industrial quarters and academia
Cut concern.Substantial amounts of statistical data shows that the imbalance of rotor typically causes the main cause of rotating machinery vibrating.It is uneven
The flexure and internal stress change of rotor can be caused, aggravated machine vibration, reduced the work efficiency of machine, when serious, can also cause each
The accident of kind.Imbalance is not only the main exciting source of rotating machinery, is also the risk factor of various self-excited vibrations, and equilibrium condition is obtained
To improvement, other some failures also will be alleviated therewith or disappear.So the development of dynamic balancing technique and perfect, to rotating machinery
Normal operation important in inhibiting.
At present, rotor unbalance value is determined with balancing machine, with amount of unbalance obtained by balancing machine measurement rotor, is balancing machine
The amount of unbalance of itself and the vector of rotor unbalance value, as balancing machine measurement zero datum is never solved, accordingly
Ground can not obtain accurate rotor unbalance value；In addition, when different angle zero degree reference points are arranged, rotor relative to flat
Weighing apparatus machine rotates to an angle, and the angle zero degree reference point on rotor is moved identical angle, work along the opposite direction that rotor rotates
Sequence is complex.
The content of the invention
It is quantitative that the technical problem to be solved is to provide a kind of rotor-support-foundation system amount of unbalance based on magnetic flow liquid
Measuring system and measuring method, the measuring method can disposably determine rotor unbalance value and imbalance using simple, efficiency high
Position；Measuring system small volume, the light weight, are applicable to the rotor-support-foundation system of various models.
To solve above-mentioned technical problem, the technical solution used in the present invention is：A kind of rotor system based on magnetic flow liquid
System amount of unbalance quantitative measurement system, including magnetic pendular ring, piezoelectric pressure indicator, preamplifier, data acquisition unit, meter
Calculation machine, controller, D/A converter, piezoelectric pressure indicator are connected with the input of preamplifier, preamplifier it is defeated
Go out end to be connected with the input of data acquisition unit, the outfan of the data acquisition unit is connected to computer, the computer and
Controller is connected, and the controller is connected with D/A converter, and D/A converter gives magnetic pendular ring by wire output current；It is described
Piezoelectric pressure indicator is installed on the top of rotor-support-foundation system rotating disk, and its one end is fixed on the support of rotor-support-foundation system, the other end
Contact with rotating disk；The magnetic pendular ring is installed on disc surfaces, and the center of magnetic pendular ring is overlapped with center of turntable.
Further technical scheme, the magnetic pendular ring include annular hollow pipeline, wire outer tube, annular hollow pipeline
Built with magnetic flow liquid, along some coils that are evenly distributed in of annular hollow pipeline, leading between D/A converter and magnetic pendular ring
Line is through in wire outer tube, and the coil is connected with the wire in wire outer tube respectively, and the quantity of the coil is according to tested turn
Depending on subsystem rotor maximum gauge size, rotor maximum gauge is bigger, and number of coils accordingly increases.
Further technical scheme, the wire outer tube are donut of the diameter less than annular hollow pipeline.
Further technical scheme, is provided with slip ring, the wire Jing on the wire between D/A converter and magnetic pendular ring
Slip ring is connected with coil.
Further technical scheme, the quantity of the coil are no less than 32.
Further technical scheme, the coil adopt dry cell power supply, the capacity of aneroid battery and specification according to coil
Depending on quantity.
Further technical scheme, the minimum current of the power supply aneroid battery is 2A.
The present invention also provides a kind of measuring method of the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid,
Comprise the following steps：
First, magnetic pendular ring and piezoelectric pressure indicator are installed on rotor-support-foundation system, by electrical wire interface and pressure on magnetic pendular ring
Electric-type pressure transducer cable interface connects on the controller, by controller with computer mutually in succession；It is installed on rotor-support-foundation system rotating disk
Top, its one end is fixed on the support of rotor-support-foundation system, and the other end is contacted with rotating disk；Magnetic pendular ring is installed on disc surfaces,
The center of magnetic pendular ring is overlapped with center of turntable；After rotor-support-foundation system operating, piezoelectric pressure indicator gathers the signal of rotating disk, leads to
Preamplifier, data acquisition unit are crossed, computer is transferred to, computer issues instructions to controller, it is Jing after D/A converter, defeated
Go out electric current and give magnetic pendular ring；
2nd, rotors system, and the rotation that remains a constant speed, rotating speed are not less than 50r/min, and keep, no less than 10s, making magnetic liquid
Magnetic flow liquid inside ring keeps being uniformly distributed substantially；
The 3rd, the steady state value of each coil current for 0.1A of magnetic pendular ring be set, the magnetic flow liquid in magnetic pendular ring is presented at a slow speed
Circulation status；
4th, coil is divided into two classes according to function：The current value of active coil and passive coil, wherein active coil always greater than or
Equal to the current value of passive coil；Passive coil is used to store magnetic flow liquid, and active coil is used to make up system amount of unbalance
Size, active coil or passive coil are determined according to the actual amount of unbalance of system under test (SUT)；
5th, active coil current value is set as I, passive coil current value is I', and coil sum is N, and active coil only has 1, then
Passive coil has N-1；
Each coil current value constraints is as follows：
（1）；
（2）, size of the dry cell capacity depending on measured rotor system, the number with coil
Amount is relevant, and total current value is no less than 2A in principle；
6th, the information fed back according to piezoelectric force transducer, controller carry out intelligent optimizing, and optimization aim is piezoelectric forces
The measurement amplitude of sensor is minimum；Optimization object is：Active coil and passive coil current value；Optimized algorithm is as follows：
（1）Coil 1 is made for active coil, remaining coil is passive coil, mean allocation total current value makes each coil value equal；
（2）Increase active coil electric current, while reducing passive coil electric current, but ensures that each passive coil electric current is equal；
（3）Check whether the amplitude that piezoelectric pressure indicator feeds back diminishes；
If piezoelectric pressure indicator amplitude diminishes, continue increase active coil electric current, until piezoelectric pressure indicator width
Value is zero, stops test, records numerical value；If piezoelectric pressure indicator amplitude becomes big, show that coil 1 is not suitable as master
Moving winding, changes and defines coil 2 for active coil, the like, repeat（2）-（4）Operation, until meeting piezoelectric type pressure
The condition that force transducer amplitude diminishes；
7th, after optimization terminates, each current value is preserved, terminates test；
8th, according to each coil current value for preserving, the size for calculating amount of unbalance of equal value, and relevant position is recorded, amount of unbalance
Computational methods are as follows：
。
Using the beneficial effect produced by above-mentioned technical proposal it is：
（1）The influence characteristic of electromagnetic field is received using magnetic flow liquid, for allocating Mass Distribution, to realize dynamically balanced purpose；
（2）Through once allocating the calculating for being capable of achieving computing ballance correction, it is not necessary to test repeatedly；
（3）Can accurately at calculating amount of unbalance size and location；
（4）Application scenario is more flexible, is applicable to the rotor system of the insurmountable large-scale, labyrinth of other dynamic balancing machines
System.
Description of the drawings
Fig. 1 is the structure chart of measuring system of the present invention；
Fig. 2 is the structure chart of magnetic pendular ring of the present invention；
Fig. 3 is the profile of A-A in Fig. 2；
Fig. 4 is the flow chart of measuring method of the present invention；
In figure：1st, annular hollow pipeline；2nd, coil；3rd, wire outer tube；4th, magnetic flow liquid；5th, wire；6th, D/A converter；7th, it is sliding
Ring.
Specific embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
The present invention can change this feature of sticky nature under the influence of electromagnetic field using magnetic flow liquid, it is proposed that one
New rotor-support-foundation system imbalance method for quantitative measuring and measuring system are planted, as shown in figure 1, the system includes magnetic pendular ring, number
Font piezoelectric pressure indicator, preamplifier, data acquisition unit, computer, controller and D/A converter 6.Wherein magnetic
Pendular ring simple structure, can select according to the flexible in size of measured rotor, and the structure of magnetic pendular ring is as shown in Fig. 2 including in annular
Blank pipe road 1, magnetic flow liquid 4, coil 2, wire outer tube 3, annular hollow pipeline 1 built with magnetic flow liquid 4, along annular hollow pipe
Road 1 is evenly distributed in some coils 2, and the wire 5 between D/A converter 6 and magnetic pendular ring is through in wire outer tube 3, such as Fig. 3
Shown, coil 2 is connected with the wire in wire outer tube 3 respectively, and the quantity of coil 2 is according to measured rotor system rotor maximum gauge
Depending on size, rotor maximum gauge is bigger, and 2 quantity of coil accordingly increases.Wire outer tube 3 is that diameter is less than annular hollow pipeline 1
Donut.Slip ring 7 is provided with wire 5 between D/A converter 6 and magnetic pendular ring, 5 Jing slip rings 7 of wire are connected with coil 2
Connect, whole magnetic pendular ring can rotate.The method of testing can disposably determine rotor unbalance value using simple, efficiency high
And non-equilibrium site.Test system small volume, the light weight, are applicable to the rotor-support-foundation system of various models.
The operation principle of measuring system provided by the present invention is as follows：Pressure transducer is installed on the rotating disk of rotor-support-foundation system
Support is fixed in side, its one end, and end thereof contacts are in rotating disk.Magnetic pendular ring is installed on into disc surfaces, and in ensureing magnetic pendular ring
The heart is coincide with center of turntable.After rotor-support-foundation system operating, pressure transducer collects signal, by preamplifier, data acquisition
Device, is transferred to computer, and computer issues instructions to controller afterwards, and Jing after D/A converter 6, output current gives magnetic pendular ring,
For controlling the current value of each coil 2 in magnetic pendular ring.Depending on 2 quantity of coil is according to the size of system under test (SUT), in principle much
In 32, system rotor maximum gauge is bigger, and 2 quantity of coil is more.2 quantity of coil is more, the measurement knot of system amount of unbalance
Fruit is more accurate.It is depending on coil 2 relies on dry cell power supply, aneroid battery quantity and specification according to measured rotor system size, former
Minimum current 2A is gone up then.It is parallel-connection structure between each coil 2, is controlled by the controller respectively.
Fig. 4 is the flow chart of measuring method of the present invention, and measuring process is as follows：
First, magnetic pendular ring and piezoelectric force transducer are installed on rotor-support-foundation system, by electrical wire interface and sensing on magnetic pendular ring
Device cable interface is even on the controller.By controller with computer mutually in succession；
2nd, rotors system, and the rotation that remains a constant speed, rotating speed are not less than 50r/min, and keep, no less than 10s, making magnetic liquid
4 basic holding of magnetic flow liquid inside ring is uniformly distributed；
The 3rd, the steady state value of 2 electric current of each coil for 0.1A of magnetic pendular ring be set, the magnetic flow liquid 4 in magnetic pendular ring is presented slowly
Fast circulation status；
4th, coil 2 is divided into two classes according to function：The current value of active coil and passive coil, wherein active coil always greater than
Or equal to the current value of passive coil.Passive coil is used to store magnetic flow liquid 4, and active coil is used to make up system amount of unbalance
Size.Actively or passively specifying for coil is determined according to the actual amount of unbalance of system under test (SUT)；
5th, active coil current value is set as I, passive coil current value is I', and coil sum is N, and active coil only has 1, and
Passive coil has N-1；
Each coil current value constraints is as follows：
（1）；
（2）, size of the aneroid battery capacity depending on measured rotor system, the number with coil
Amount is relevant, namely the quantity of coil is more, and the capacity of aneroid battery is bigger, and total current value is no less than 2A in principle；
6th, the information fed back according to piezoelectric force transducer, controller carry out intelligent optimizing, and optimization aim is piezoelectric forces
The measurement amplitude of sensor is minimum；Optimization object is active and passive coil current value；Optimized algorithm is as follows：
（1）Coil 1 is made for active coil, remaining coil is passive coil, mean allocation total current value makes each coil value equal；
（2）Increase active coil electric current, while reducing passive coil electric current, but ensures that each passive coil electric current is equal；
（3）Check whether the amplitude that piezoelectric pressure indicator feeds back diminishes；
（4）If sensor magnitudes diminish, continue increase active coil electric current, until sensor magnitudes are zero, stop test, note
Record numerical value；If sensor magnitudes become big, show that coil 1 is not suitable as active coil, change and define moving-wire based on coil 2
Circle, the like, repeat（2）-（4）Operation, until meeting the condition that sensor magnitudes diminish；
7th, after optimization terminates, each current value is preserved, terminates test；
8th, according to each coil current value for preserving, the size for calculating amount of unbalance of equal value, and record relevant position.Amount of unbalance
Computational methods are as follows：
。
The present invention is the influence characteristic using magnetic rheological liquid by electromagnetic field, for allocating Mass Distribution, dynamic flat to realize
The purpose of weighing apparatus；Through once allocating the calculating for being capable of achieving computing ballance correction, it is not necessary to test repeatedly；Can be accurately uneven at calculating
The size and location of amount；Application scenario is more flexible, is applicable to other dynamic balancing machines insurmountable large-scale, labyrinth
Rotor-support-foundation system.
Claims (8)
1. a kind of rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid, it is characterised in that including magnetic pendular ring,
Piezoelectric pressure indicator, preamplifier, data acquisition unit, computer, controller, D/A converter (6), piezoelectric pressure
Sensor is connected with the input of preamplifier, and the outfan of preamplifier is connected with the input of data acquisition unit, institute
The outfan for stating data acquisition unit is connected to computer, and the computer is connected with controller, the controller and D/A converter
(6) it is connected, D/A converter (6) gives magnetic pendular ring by wire (5) output current；The piezoelectric pressure indicator is installed on
The top of rotor-support-foundation system rotating disk, its one end are fixed on the support of rotor-support-foundation system, and the other end is contacted with rotating disk；The magnetic pendular ring
Disc surfaces are installed on, the center of magnetic pendular ring is overlapped with center of turntable.
2. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 1, its feature exist
In the magnetic pendular ring includes annular hollow pipeline (1), wire outer tube (3), and annular hollow pipeline (1) is built with magnetic flow liquid
(4), some coils (2), the wire between D/A converter (6) and magnetic pendular ring are evenly distributed in along annular hollow pipeline (1)
(5) it is through in wire outer tube (3), the coil (2) is connected with the wire in wire outer tube (3) respectively, the number of the coil (2)
Depending on amount is according to measured rotor system rotor maximum gauge size, rotor maximum gauge is bigger, and coil (2) quantity accordingly increases.
3. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 2, its feature exist
In the wire outer tube (3) is donut of the diameter less than annular hollow pipeline (1).
4. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 2, its feature exist
In, be provided with slip ring (7) on the wire (5) between D/A converter (6) and magnetic pendular ring, the wire (5) Jing slip rings (7) with
Coil (2) connects.
5. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 2, its feature exist
In the quantity of the coil (2) is no less than 32.
6. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 2, its feature exist
In depending on the coil (2) adopts the quantity of dry cell power supply, the capacity of aneroid battery and specification according to coil (2).
7. the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid according to claim 6, its feature exist
In the minimum current of the power supply aneroid battery is 2A.
8. a kind of measuring method of the rotor-support-foundation system amount of unbalance quantitative measurement system based on magnetic flow liquid, comprises the following steps：
First, magnetic pendular ring and piezoelectric pressure indicator are installed on rotor-support-foundation system, by electrical wire interface and pressure on magnetic pendular ring
Electric-type pressure transducer cable interface connects on the controller, by controller with computer mutually in succession；It is installed on rotor-support-foundation system rotating disk
Top, its one end is fixed on the support of rotor-support-foundation system, and the other end is contacted with rotating disk；Magnetic pendular ring is installed on disc surfaces,
The center of magnetic pendular ring is overlapped with center of turntable；After rotor-support-foundation system operating, piezoelectric pressure indicator gathers the signal of rotating disk, leads to
Preamplifier, data acquisition unit are crossed, computer is transferred to, computer issues instructions to controller, Jing after D/A converter (6),
Output current gives magnetic pendular ring；
2nd, rotors system, and the rotation that remains a constant speed, rotating speed are not less than 50r/min, and keep, no less than 10s, making magnetic liquid
Magnetic flow liquid inside ring keeps being uniformly distributed substantially；
The 3rd, the steady state value of each coil (2) electric current for 0.1A of magnetic pendular ring be set, make the magnetic flow liquid in magnetic pendular ring be presented slow
Fast circulation status；
4th, coil (2) is divided into two classes according to function：The current value of active coil and passive coil, wherein active coil is always big
In or equal to the current value of passive coil；Passive coil is used to store magnetic flow liquid, and active coil is used to make up system imbalance
The size of amount, active coil or passive coil are determined according to the actual amount of unbalance of system under test (SUT)；
5th, active coil current value is set as I, passive coil current value is I', and coil sum is N, and active coil only has 1, then
Passive coil has N-1；
Each coil current value constraints is as follows：
（1）；
（2）, size of the dry cell capacity depending on measured rotor system, the number with coil
Amount is relevant, and total current value is no less than 2A in principle；
6th, the information fed back according to piezoelectric force transducer, controller carry out intelligent optimizing, and optimization aim is piezoelectric forces
The measurement amplitude of sensor is minimum；Optimization object is：Active coil and passive coil current value；Optimized algorithm is as follows：
（1）Coil 1 is made for active coil, remaining coil is passive coil, mean allocation total current value makes each coil value equal；
（2）Increase active coil electric current, while reducing passive coil electric current, but ensures that each passive coil electric current is equal；
（3）Check whether the amplitude that piezoelectric pressure indicator feeds back diminishes；
（4）If piezoelectric pressure indicator amplitude diminishes, continue increase active coil electric current, until piezoelectric pressure indicator
Amplitude is zero, stops test, records numerical value；If piezoelectric pressure indicator amplitude becomes big, show that coil 1 is not suitable as
Active coil, changes and defines coil 2 for active coil, the like, repeat（2）-（4）Operation, until meeting piezoelectric type
The condition that pressure transducer amplitude diminishes；
7th, after optimization terminates, each current value is preserved, terminates test；
8th, according to each coil current value for preserving, the size for calculating amount of unbalance of equal value, and relevant position is recorded, amount of unbalance
Computational methods are as follows：
。
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|---|---|---|---|
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| CN110905731A (en) * | 2019-11-14 | 2020-03-24 | 许昌许继风电科技有限公司 | Wind driven generator, dynamic balance method of wind driven generator and dynamic balance device |
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| Publication number | Publication date |
|---|---|
| CN106525336B (en) | 2018-11-02 |
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