CN109540390A - The method and dynamic balancing mandrel of high speed rotor removal amount of unbalance - Google Patents
The method and dynamic balancing mandrel of high speed rotor removal amount of unbalance Download PDFInfo
- Publication number
- CN109540390A CN109540390A CN201811558999.6A CN201811558999A CN109540390A CN 109540390 A CN109540390 A CN 109540390A CN 201811558999 A CN201811558999 A CN 201811558999A CN 109540390 A CN109540390 A CN 109540390A
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- Prior art keywords
- mandrel
- high speed
- unbalance
- rotor
- speed rotor
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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
- G01M1/30—Compensating unbalance
- G01M1/34—Compensating unbalance by removing material from the body to be tested, e.g. from the tread of tyres
-
- 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
- G01M1/02—Details of balancing machines or devices
- G01M1/04—Adaptation of bearing support assemblies for receiving the body to be tested
Abstract
The invention discloses the methods and dynamic balancing mandrel of a kind of high speed rotor removal amount of unbalance, under hard support system, need mandrel and rotor whole dynamic balance, amount of unbalance is removed by weight reduction, and rotor high speed rotation is by producing the mandrel containing weight, rotor rotation is driven under high speed rotation, and the dynamic balancing processing that loss of weight obtains rotor is carried out on rotor.The present invention can quickly and accurately measure high speed rotor and control its unbalancing value.
Description
Technical field
The present invention relates to high speed rotation rotor dynamic balancing methods, and in particular to the integral wheel system part of aviation field and
The dynamic balancing processing method of high speed rotor class part.
Background technique
With the development of science and technology, the performance of aviation machine is continuously improved, the rotor as aviation machine important component
Just develop towards the direction of high revolving speed, big L/D ratio, working speed is often higher than crooked critical rotary speed, and structure is increasingly complicated.Its
Dynamic characteristics have the characteristics that it is obvious, for example, very sensitive to vibration caused by amount of unbalance, and caused by high speed rotor is uneven
Vibration is the one of the major reasons of complete machine oscillation, according to statistics, since vibration cause leads to about the 60% of equipment failure
~70%, wherein research rotor balancing problem has important since the ratio of rotor unbalance failure is 30% or so
Meaning.
Mass Distribution of the rotor of rotating machinery due to being influenced by quality of materials and machining accuracy etc., on rotor
Relative to rotation center it is not possible that absolute is symmetrical, therefore any one rotor can not accomplish " absolute equilibrium ", rotor quality
Always with the presence of certain eccentricity between center and rotation centerline, this allows for forming periodic centrifugation when rotor rotation
Power generates dynamic loading on bearing, vibrates machine.Dynamic balancing can be divided into 2 classes by supporting form: soft support and hard branch
Support.
Soft support dynamic balancing machine surveys width type, detects that the amount of unbalance directly proportional to amplitude, V-arrangement are supported by sensor,
Two length of support are determined with the axial dimension (150mm) and counterbalance effect, that is, stability of workpiece and belt pulley, are driven skin
Band is press-down type, and when balance axially can vibration.Generally require revolving speed at 3 times of resonance speed or more, revolving speed is higher, and weight-loss ratio is brighter
It is aobvious.Since time of measuring is longer；Practical calibration is needed, overweight measurement has certain measurement.Therefore, domestic mainly to be made of hard support
Balance test.
Hard support dynamic balancing machine, force measurement type detect the amount of unbalance directly proportional to centrifugal force by sensor.Support side
Formula is roller wheel bearing, and two length of support are servo-actuated the length (300mm) of balance shaft and determine, driving belt is press-down type, axis both ends
Have and only go here and there idler wheel, when balance axially can not vibration.
It is that need to consider that rotor degree of disturbing influences when revolving speed is higher than a certain critical value.The dynamic balance principle of flexible rotor is than rigid
Property rotor it is complicated, reason is exactly that rotary machine rotor can generate due to the effect of centrifugal force after revolving speed is more than first critical speed
Deflection deformation, when the revolving speed difference of flexible rotor, uneven centrifugal force size is also different, therefore rotor has different flexures
Deformation, the deflection deformation of rotor changes the Mass Distribution of rotor, also just changes the distribution of amount of unbalance, so flexible rotor
Unbalance condition be the variation with revolving speed and change.
Rotor dynamic balancing need to consider the amount of unbalance of rotor mandrel when measuring, need to first remove mandrel not in dynamic balancing measurement
Aequum, then the amount of unbalance of whole air plug gauge and rotor, are removed amount of unbalance.The shape of rotor mandrel removes not
The method of aequum is most important to the dynamic balancing of rotor.
Summary of the invention
Lead to complete machine oscillation Problem of Failure for high speed rotor unbalance dynamic, the object of the present invention is to provide a kind of high speeds to turn
The method and dynamic balancing mandrel of son removal amount of unbalance need mandrel and rotor whole dynamic balance, by subtracting under hard support system
Weight method removes amount of unbalance, and rotor high speed rotation drives rotor rotation by producing the mandrel containing weight under high speed rotation
Turn, the dynamic balancing processing method that loss of weight obtains rotor is carried out on rotor.
The present invention is achieved by following technical solution:
The method of high speed rotor removal amount of unbalance, comprising the following steps:
Step 1 carries out dynamic balancing measurement to the mandrel for the part being assembled in addition to high speed rotor and (does not fill on mandrel
With high speed rotor, but it is assembled with other parts), weight reduction is used to mandrel until mandrel amount of unbalance is less than according to measurement result
Setting value t, t are less than the allowable amount of unbalance T of high speed rotor；
Mandrel and high speed rotor are assembled laggard action balance and measured, adopted according to measurement result to high speed rotor by step 2
With weight reduction until amount of unbalance is less than or equal to the allowable amount of unbalance T of high speed rotor.
In the step 1, Assembly part includes gasket, driving key and nut.
The weight reduction is the method by drilling removal metal.
The dynamic balancing measurement uses hard supporting way.
A kind of dynamic balancing mandrel for above-mentioned high speed rotor removal amount of unbalance method, the mandrel includes clump weight,
Clump weight is the cylindrical body coaxial with mandrel, and the outer diameter of cylindrical body is greater than the maximum outside diameter of mandrel.
Two end faces of the clump weight are metal removal face.
The mandrel material is 38Cr, and hardness meets HRC30~35, and surface carries out processing of turning blue, sharp edge rounding
High speed rotor dynamic balancing of the invention is to measure on support dynamic balancing machine firmly to all kinds of high speed rotors, is passed through
To dynamic balancing mandrel counterweight block size, diameter, length, amount of unbalance require optimum organization to realize.
Compared with prior art, the features of the present invention is embodied in: can quickly and accurately measure high speed rotor simultaneously using this method
Control its unbalancing value.Using the present invention can eliminate rotor speed it is excessive when, generate degree of disturbing deform bring amount of unbalance, disappear
Except driving the mandrel amount of unbalance of rotor rotation to influence, removal amount of unbalance is quick.It can be used repeatedly for mandrel of the invention, and
Material selection steel can also select the material of other more high rigidity.
Detailed description of the invention
Fig. 1 is the part schematic diagram that mandrel is corresponded in embodiment；
Fig. 2 is dynamic balancing operation mode schematic diagram；
Fig. 3 is the structural schematic diagram of mandrel whole dynamic balance；
Fig. 4 is the schematic diagram of mandrel and rotor whole dynamic balance；
Fig. 5 is the display interface schematic diagram of Pasio-50 dynamic balancing machine in embodiment.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described, but required protection scope be not limited to it is described.
By taking helicopter environmental control system controls impeller (high speed rotor) unbalancing value as an example, which is
0.2gcm can cause rotor radial rotation to lead to rotor oscillation when rotor residual unbalance, is excessive under high speed rotation,
Rotor fails can seriously be caused.
It is processed, is embodied as follows using dynamic balancing processing method of the invention:
1. selecting equipment: selecting the dynamic balancing machine with good dynamic and stability, select model in the present embodiment
The dynamic balancing machine of Pasio-50；
2. selecting mandrel: as shown in Figure 1, mandrel uses counter weight construction, i.e. a cylindrical shaped weight block, mandrel selects material
It is processed for the bar of 38Cr, guarantees that mandrel hardness meets HRC30~35 after being heat-treated, mandrel surface carries out place of turning blue
Reason, size is as shown in Figure 1, sharp edge rounding R0.2；
3. mandrel dynamic balancing: as shown in figure 3, gasket 3, driving key 2, nut 4 are assembled to mandrel, using weight reduction (in Fig. 3
In the clump weight surface drilling pointed out, i.e. dynamic balancing in Fig. 3 goes to metal sites, including the face M), removal metal is until mandrel is surplus
Remaining amount of unbalance is less than or equal to 0.03gcm；In dynamic balancing machine balanced mode selection such as Fig. 2 mode, mandrel is two correction sides.If
Setting parameter includes distance a, distance b, distance c, radius R1 and radius R2.Then mandrel, driving key 2, gasket 3, nut 4 are whole does
Dynamic balancing, parameter is arranged: balancing speed is (700 ± 50 rpms), and direction of rotation selection rotates forward, and remaining imbalance does not permit
Perhaps it is greater than 0.03gcm.
4. dynamic balancing after the assembly of mandrel rotor: mandrel assembles rotor and carries out dynamic balancing, mode of operation and mandrel dynamic balancing phase
Together, such as Fig. 4, two sides are supported using dynamic balancing machine bracket, are driven by driving belt.In the selection of dynamic balancing machine balanced mode as schemed
2 modes, mandrel rotor are two correction sides, and setting parameter includes distance a, distance b, distance c, radius R1 and radius R2.Revolving speed choosing
2000 rpms (critical speeds 10%) are selected, remove metal (face A and the face C as shown in Figure 4) on high speed rotor until remaining
Amount of unbalance is less than or equal to 0.2gcm.Detailed process is as follows: setting parameter balance revolving speed is 2000 rpms of (critical speeds
10%), amount of unbalance selects 0.2gcm.First start motor, motor speed is slowly adjusted to (1000~1100) revolutions per minute
Clock, and (15~30) minute is operated under the revolving speed, dynamic balancing machine is preheated.Dynamic balancing rotational speed regulation to (2000~
2100) rpm, amount of unbalance selects 0.2gcm grade, after waiting dynamic balancing revolving speed basicly stable, visits and sees dynamic balancing measurement
The uneven magnitude of the high speed rotor shown in software interface pulls with hand driving belt, band after motor shuts down completely
Dynamic dynamic balancing mandrel and high speed rotor rotate slowly together, when high speed rotor turns in a certain angular range, can be observed
Angle indicator in dynamic balancing measurement software interface can be highlighted (as shown in figure 5, being respectively rotor assembly A at arrow meaning
The uneven magnitude in face and the uneven magnitude in the face rotor assembly C), illustrate to need in the high speed rotor (leaf i.e. in the present embodiment
Wheel) in the angular range in remove uneven metal, it is soft that the uneven weight metal for needing to remove is shown in dynamic balancing measurement
The lower section at part interface.
By the processing of above method, impeller (high speed rotor) residual unbalance, is less than or equal to allowable amount of unbalance, to the greatest extent
The removal of metal is potentially reduced, guarantees the structural strength and surface quality of impeller (high speed rotor), greatly increases impeller
(high speed rotor) processing quality.
Claims (7)
1. the method for high speed rotor removal amount of unbalance, which comprises the following steps:
Step 1 carries out dynamic balancing measurement to the mandrel for the part being assembled in addition to high speed rotor, according to measurement result to mandrel
Using weight reduction until mandrel amount of unbalance is less than setting value t, t is less than the allowable amount of unbalance T of high speed rotor；
Mandrel and high speed rotor are assembled laggard action balance and measured, used and subtracted to high speed rotor according to measurement result by step 2
Weight method is until amount of unbalance is less than or equal to the allowable amount of unbalance T of high speed rotor.
2. the method for high speed rotor removal amount of unbalance according to claim 1, it is characterised in that: in the step 1,
Assembly part includes gasket, driving key and nut.
3. the method for high speed rotor removal amount of unbalance according to claim 1, it is characterised in that: the weight reduction is logical
The method for crossing drilling removal metal.
4. the method for high speed rotor removal amount of unbalance according to claim 1, it is characterised in that: the dynamic balancing measurement
Using hard supporting way.
5. a kind of dynamic balancing mandrel for claim 1,2,3 or the 4 high speed rotor removal amount of unbalance methods, feature
Be: the mandrel includes clump weight, and clump weight is the cylindrical body coaxial with mandrel, and the outer diameter of cylindrical body is greater than mandrel most
Big outer diameter.
6. dynamic balancing mandrel according to claim 5, it is characterised in that: two end faces of the clump weight are metal removal
Face.
7. dynamic balancing mandrel according to claim 5, it is characterised in that: the mandrel material is 38Cr, and hardness meets
HRC30~35, surface carry out processing of turning blue, sharp edge rounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558999.6A CN109540390B (en) | 2018-12-19 | 2018-12-19 | Method for removing unbalance of high-speed rotor and dynamic balance mandrel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558999.6A CN109540390B (en) | 2018-12-19 | 2018-12-19 | Method for removing unbalance of high-speed rotor and dynamic balance mandrel |
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| CN109540390A true CN109540390A (en) | 2019-03-29 |
| CN109540390B CN109540390B (en) | 2021-08-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132492A (en) * | 2019-04-28 | 2019-08-16 | 沈阳透平机械股份有限公司 | A kind of dynamic balance of impeller duplicate removal automatic barring gear and method |
| CN110261112A (en) * | 2019-07-11 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of dynamic balancing appraisal procedure of ultraprecise journal wear situation |
| CN110319976A (en) * | 2019-07-04 | 2019-10-11 | 重庆水轮机厂有限责任公司 | A kind of francis turbine runner dynamic balance running method |
| CN110608845A (en) * | 2019-10-21 | 2019-12-24 | 山西汾西重工有限责任公司 | Dynamic balance test mechanism and dynamic balance test method for lamellar propeller |
| CN111174976A (en) * | 2020-01-15 | 2020-05-19 | 中国南方航空股份有限公司 | Method for controlling unbalance amount of APU rotor assembly |
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| CN103115725A (en) * | 2013-01-16 | 2013-05-22 | 长沙赛尔透平机械有限公司 | Balancing device and balancing method for dynamic balancing test before impeller over speed |
| CN103439054A (en) * | 2013-08-21 | 2013-12-11 | 重庆江增船舶重工有限公司 | Blind hole impeller dynamic balancing testing device |
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| CN102332796A (en) * | 2011-06-24 | 2012-01-25 | 东方电气（乐山）新能源设备有限公司 | Dynamic balance emendation method of 1.5MW wind power generator with radial fan and rotor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132492A (en) * | 2019-04-28 | 2019-08-16 | 沈阳透平机械股份有限公司 | A kind of dynamic balance of impeller duplicate removal automatic barring gear and method |
| CN110319976A (en) * | 2019-07-04 | 2019-10-11 | 重庆水轮机厂有限责任公司 | A kind of francis turbine runner dynamic balance running method |
| CN110261112A (en) * | 2019-07-11 | 2019-09-20 | 中国航发哈尔滨东安发动机有限公司 | A kind of dynamic balancing appraisal procedure of ultraprecise journal wear situation |
| CN110608845A (en) * | 2019-10-21 | 2019-12-24 | 山西汾西重工有限责任公司 | Dynamic balance test mechanism and dynamic balance test method for lamellar propeller |
| CN111174976A (en) * | 2020-01-15 | 2020-05-19 | 中国南方航空股份有限公司 | Method for controlling unbalance amount of APU rotor assembly |
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|---|---|
| CN109540390B (en) | 2021-08-17 |
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