CN103413486B - The soft monolateral support dynamic balancing machine of a kind of rigid rotator - Google Patents
The soft monolateral support dynamic balancing machine of a kind of rigid rotator Download PDFInfo
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- CN103413486B CN103413486B CN201310253499.2A CN201310253499A CN103413486B CN 103413486 B CN103413486 B CN 103413486B CN 201310253499 A CN201310253499 A CN 201310253499A CN 103413486 B CN103413486 B CN 103413486B
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- monolateral
- soft
- worktable
- dynamic balancing
- balancing machine
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Abstract
The present invention relates to the soft monolateral support dynamic balancing machine of a kind of rigid rotator, by worktable (1), vialog (2), switchgear building (3), equilibrator forms, and equilibrator is arranged on worktable (1), and equilibrator exports and is connected with the sensor installed in worktable (1) cabinet, sensor sends to vialog (2) signal, and then the test of settling signal.The present invention can carry out transient equilibrium and repeatedly test, and makes the transient equilibrium data obtained progressively tend to theoretical values, thus contributes to improving the manipulative ability of student and the comprehension to theory.
Description
Technical field
The invention belongs to rote teaching Instrument technology field, particularly relate to the soft monolateral support dynamic balancing machine of a kind of rigid rotator.
Background technology
At present in the many science and engineering Scientific Research in University Laboratory of China in order to improve the quality of teaching better, help positively, improve undergraduate manipulative ability, focus on the cultivation of laser hybrid welding, fully in conjunction with the concrete teaching affairs in this school, under the condition that school is in power, give undergraduate course classmate and create more chance and more suitably experimental facilities, be beneficial to learning interest and the manipulative ability of cultivating university students, greatly extensively expand their visual field.
We know when machine operation, and the inertial force that each component produces and inertia couple, cause additional dynamic pressure and friction force by each kinematic pair, thus accelerate the wearing and tearing of pairing element, reduce mechanical efficiency and weaken the intensity of component.Because the size direction of inertial force and inertia couple is transported with machinery, transferred to periodic change, machinery and basis thereof will be made to produce forced vibration.Will resonance be caused when the natural frequency of vibration frequency close to mechanical system, cause machinery to be difficult to normally run, by the safety of entail dangers to surrounding buildings and personnel time serious.Therefore must manage inertial force and inertia couple are balanced or partial equilibrium, to reduce the harmful effect that it produces as far as possible, thus improve the serviceability of machinery, its serviceable life will be extended simultaneously.
Summary of the invention
Technical matters to be solved by this invention is to provide the soft monolateral support dynamic balancing machine of a kind of rigid rotator, is not suitable in Scientific Research in University Laboratory, carry out the confinement problems used of imparting knowledge to students with the industrial dynamic balancing machine that original rigid bilateral support is traditional to solve.
The soft monolateral support dynamic balancing machine of a kind of rigid rotator, comprise worktable, vialog, switchgear building, it described switchgear building is worktable, the protruding back up pad in worktable side, back up pad is fixed with vialog, a monolateral supporting base is fixed above worktable, monolateral supporting base is provided with V-type back-up block, V-type back-up block is provided with by front, afterframe and a left side, the general frame of correct frame composition, position, axis on general frame is parallel has placed balancing axle, balancing axle there are four balance wheels, before, afterframe includes slide bar and slide block, slide block string is on slide bar, near a left side for supporting base side, correct frame is below by above the worktable that is connected of extension spring and extension spring set collar, near a left side for extension spring position, a sensor steel wire is also fixed with below correct frame, sensor steel wire is connected with the sensor in the cabinet of worktable through work top straight down, wherein before one side, the worktable in the outside of afterframe is fixed with electric machine support, electric machine support is provided with motor base, motor base middle chamber is fixed with motor, motor base one side-lower is connected with the adjustment knob on electric machine support by buckle, motor base opposite side protrudes formation trip(ping) lever handle to the top of general frame, there is a follower shaft in the outside of trip(ping) lever handle upper end, abrasive band is connected with between follower shaft and motor output shaft.
Main entrance, power supply emergency stop switch are installed before described switchgear building.
Described monolateral supporting base is installed with V-type back-up block respectively by the monolateral support spring sheet that its left and right side two inclination angle is relative.
By two on left and right framework, pair mandrel contact bearing is parallel has placed balancing axle in position, axis on described general frame.
Described balancing axle is placed on mandrel contact bearing by the mandrel raceway at its two ends.
Described sensor is connected with vialog by connecting line.
Described electric machine support is provided with motor base by installation shaft.
Described motor lower portion stretches out a power lead.
The outside of described trip(ping) lever handle upper end is fixed with a follower shaft by tense-lax adjustment bolt.
The equilibrium problem of machinery can be divided into the large class of the balance two of the balance of solid of revolution (rotor) and mechanism.The soft monolateral support dynamic balancing machine of a kind of rigid rotator is mainly for the balance of solid of revolution (rotor): the balance meaning inertial force around stationary shaft revolving member and inertia couple.It can be divided into again the balance of the balance of rigidity revolving meber and flexible revolving meber.The former is considered as rigid body revolving meber, the elastic deformation caused under ignoring its inertial force effect, during this balance method is generally applied to, low-speed machinery; Revolving meber as flexible piece process, must be considered the unbalanced factor caused by elastic deformation by the latter, and this balance method is applied to high speed machine.
In the balance of rigid rotator, rotor as shown in Figure 9, d is diameter, and width is b, m
1, m
2for unbalance mass, the intersection point O of axis of rotation and central principal inertia axis line, when this rotor rotates with constant angular velocity ω, the inertial force that on rotor, each point produces can be reduced to an inertial force F by barycenter C place and moment of inertia M.
F＝F
1+F
2
M＝F
1l
1+F
2l
2
When
time, because width b is comparatively large, the unevenness of mass distribution is not often in same plane, and moment of inertia M can not ignore and disregards, if engine crankshaft, motor rotor etc. are the example of this type of rotor typical.The centrifugal force produced when the rotor is turning is not plane force system, but space force system.Even if total centroid position of this type of rotor is on axis of rotation, during revolution, the imbalance of moment of inertia also can show, so the balance of class rotor is transient equilibrium.Transient equilibrium can be just the balance of inertial force and moment of inertia.
Beneficial effect
Industry dynamic balancing machine settles the experimental result of formula at one go, classmates can not be met and understand the slow process that transient equilibrium progressively revises, and the present invention is when testing, be different from the rigid dual-gripper experiment of industrial dynamic balancing machine, it fully allows classmates do it yourself repeatedly to test at an enterprising action balance of experimental facilities, the transient equilibrium data obtained are made progressively to tend to theoretical values, experiment also tends to progressively complete, thus make classmates can have progressively understanding and the process known from experience, there is the experimental period that more gradual, also be satisfactorily complete within the laboratory time controlled, once enlightening experiment effect so extremely manifests.
Accompanying drawing explanation
Fig. 1 is LOOK RIGHT overall appearance schematic diagram of the present invention.
Fig. 2 is schematic diagram on the left of dynamic balancing machine of the present invention.
Fig. 3 is balance wheel of the present invention and mandrel schematic diagram.
Fig. 4 is off working state schematic diagram on the left of dynamic balancing machine of the present invention.
Fig. 5 is that dynamic balancing machine balance wheel mandrel of the present invention settles bearing schematic diagram.
Fig. 6 is dynamic balancing machine left rear side schematic diagram of the present invention.
Fig. 7 is dynamic balancing machine right lateral side schematic diagram of the present invention.
Fig. 8 is LOOK LEFT overall work view of the present invention.
Fig. 9 is rotor block trimming moment figure.
Figure 10 is principle of the invention figure.
Figure 11 is the dynamic balance principle figure of uneven solid of revolution.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Embodiment 1
As shown in Fig. 1 ~ Fig. 8, the soft monolateral support dynamic balancing machine of a kind of rigid rotator, comprise worktable 1, vialog 2, switchgear building 3, attaching plug 4, main entrance 5, power supply emergency stop switch 6, before, afterframe 7, monolateral support spring sheet 8, monolateral supporting base 9, left, correct frame 10, balance wheel 11, balancing axle 12, mandrel raceway 13, slide bar 14, slide block 15, mandrel contact bearing 16, installation shaft 17, trip(ping) lever handle 18, tense-lax adjustment bolt 19, adjustment knob 20, electric machine support 21, motor power-supply wire 22, follower shaft 23, abrasive band 24, motor base 25, motor 26, motor output shaft 27, V-type back-up block 28, extension spring 29, extension spring set collar 30, sensor steel wire 31, vialog panel 32, connecting line 33, sensor 34, described switchgear building 3 is worktable 1, the protruding back up pad in worktable 1 side, back up pad is fixed with vialog 2, worktable 1 fixes a monolateral supporting base 9 above, monolateral supporting base 9 is provided with V-type back-up block 28, V-type back-up block 28 is provided with by front, afterframe 7 and a left side, the general frame that correct frame 10 forms, position, axis on general frame is parallel has placed balancing axle 12, balancing axle 12 there are four balance wheels 11, before, afterframe 7 includes slide bar 14 and slide block 15, slide block 15 is gone here and there on slide bar 14, near a left side for supporting base 9 side, correct frame 10 is below by above the worktable 1 that is connected of extension spring 29 and extension spring set collar 30, near a left side for extension spring 29 position, correct frame 10 is also fixed with a sensor steel wire 31 below, sensor steel wire 31 is connected with the sensor 34 in the cabinet of worktable 1 through worktable 1 straight down, wherein before one side, the worktable 1 in the outside of afterframe 7 is fixed with electric machine support 21, electric machine support 21 is provided with motor base 25, motor base 25 middle chamber is fixed with motor 26, motor base 25 1 side-lower is connected with the adjustment knob 20 on electric machine support 21 by buckle, motor base 25 opposite side protrudes formation trip(ping) lever handle 18 to the top of general frame, there is a follower shaft 23 in the outside of trip(ping) lever handle 18 upper end, abrasive band 24 is connected with between follower shaft 23 and motor output shaft 27.
Described switchgear building 3 is provided with main entrance 5, power supply emergency stop switch 6 above.
Described monolateral supporting base 9 is installed with V-type back-up block 28 respectively by the monolateral support spring sheet 8 that its left and right side two inclination angle is relative.
Position, axis on described general frame has placed balancing axle 12 by two pairs of mandrel contact bearings 16 on left and right framework 10 are parallel.
Described balancing axle 12 is placed on mandrel contact bearing 16 by the mandrel raceway 13 at its two ends.
Described sensor 34 is connected with vialog 2 by connecting line 33.
Described electric machine support 21 is provided with motor base 25 by installation shaft 17.
A power lead 22 is stretched out in described motor 26 bottom.
The outside of described trip(ping) lever handle 18 upper end is fixed with a follower shaft 23 by tense-lax adjustment bolt 19.
The soft monolateral support dynamic balancing machine of a kind of rigid rotator is that rigid rotator implements dynamic balance method, and is a kind of soft supporting transient equilibrium in the method (the angle of revolution speed when rotor balancing is higher than the natural frequency ω >3 ω of rotor and supporting system thereof).
Utilize soft monolateral support dynamic balancing machine to carry out the experiment of revolving-body dynamic-balancing, Figure 10 is the schematic diagram of this equilibrator device, and framework is connected with frame by cross elastic bearing, and framework and test specimen and spring form a vibrational system.When framework acts on by external force (rotor unbalance inertial force), must vibrate around cross elastic bearing axis A-A, its amplitude is recorded faithfully by vialog.Wherein speed pickup utilizes electromagnetic induction principle, and the frame vibration speed caused by unbalance inertia force becomes voltage signal and passes to vialog, has integrating circuit rate signal is reduced into displacement signal thus obtains amplitude signal in vialog.
By revolving member dynamic balance principle we know, when each several part on a uneven revolving member, due to the centrifugal intertia force that uneven weight produces, it always can be decomposed into two power parallel to each other, Figure 11 is the dynamic balance principle figure of uneven solid of revolution, figure midplane I-I and II-II be optional two parallel to each other and perpendicular to the plane of axis of rotation, in figure, P II is the inertial force of plane decomposition in Planar Mechanism-II, will have unbalance inertia force P I equally in plane I-I.In I-I and II-II plane, respectively static equilibrium is carried out to P I and P II like this, make
wherein G1, G2 are equivalent to produce inertial force P I and the uneven weight of P II in plane I-I and II-II respectively,
be respectively the turning radius of uneven weight; G
1b, G
2bfor the counterweight added in I-I and II-II plane,
be respectively its turning radius, now this component reaches transient equilibrium.
Soft monolateral support dynamic balancing machine experimental provision can measure the uneven mass-redius product in two planes respectively
with
size and Orientation, make test specimen reach transient equilibrium.Rotor II-II plane is placed on A-A axis, makes the unbalance inertia force generation in I-I plane around the oscillatory torque M of A-A axis so when the rotor is turning
1=P
u1cos (ω t), thus make frame system produce forced vibration to axis A-A.Produce when its vibration frequency is identical with the natural frequency of frame system itself and resonate, the peak swing A of now steady-state vibration is directly proportional to exciting force value.
Also balance test can be carried out to II-II plane with same method.
1, the soft monolateral support dynamic balancing machine experiment of rigid rotator
(1) power-on makes instrument energising preheating 10 minutes; Select knob to be placed on X (f>1) shelves vialog 2 function, range switch is placed in 300 μ shelves.
(2) press dynamic balancing machine trip(ping) lever handle 18, motor 26 rotates, and by abrasive band 24, balance wheel 11 is rotated, rotating speed is higher than the natural frequency of vibrational system; (note: make abrasive band contact equilibrium wheel 11 gently)
(3) after balance wheel 11 stabilization of speed, slowly lift dynamic balancing machine trip(ping) lever handle 18, balance wheel 11 inertia freely rotates, because the rotating speed of the effect balance wheel 11 of friction is by declining gradually soon and slowly, when rotating speed is close to resonance region, gauge pointer occurrence dynamics change on panel 32, classmate just can record vialog 2 data (in triplicate).
(4) respectively balance test is carried out to planar I-I and II-II.
Above-mentioned steps carries out first time balance, and its precision generally can reach 5 μ, unbalance residual content 5gmm.Can carry out second time balance on this basis to improve precision, the range switch of vialog 2 is placed in 10 μ shelves, now measuring accuracy improves 30 times, because balance wheel 11 has tended to close to balance, and G
tunsuitable excessive, get G
t=0.2--0.3g, repeats step during first time balance.
(5) off-test, takes off balancing axle 12, powered-down.
Claims (9)
1. the soft monolateral support dynamic balancing machine of rigid rotator, comprise worktable (1), vialog (2), switchgear building (3), it is characterized in that: described switchgear building (3) is upper is worktable (1), the protruding back up pad in worktable (1) side, back up pad is fixed with vialog (2), worktable (1) fixes a monolateral supporting base (9) above, monolateral supporting base (9) is provided with V-type back-up block (28), V-type back-up block (28) is provided with by front, afterframe (7) and a left side, the general frame that correct frame (10) forms, position, axis on general frame is parallel has placed balancing axle (12), balancing axle (12) there are four balance wheels (11), before, afterframe (7) includes slide bar (14) and slide block (15), slide block (15) string is on slide bar (14), near a left side for supporting base (9) side, correct frame (10) is below by above the worktable that is connected (1) of extension spring (29) and extension spring set collar (30), near a left side for extension spring (29) position, correct frame (10) is also fixed with a sensor steel wire (31) below, sensor steel wire (31) is connected with the sensor (34) in the cabinet of worktable (1) through worktable (1) face straight down, described worktable (1) is fixed with electric machine support (21), before described electric machine support (21) is positioned at, the outside of the arbitrary framework in afterframe (7), described electric machine support (21) is provided with motor base (25), motor base (25) middle chamber is fixed with motor (26), motor base (25) one side-lower is connected with the adjustment knob (20) on electric machine support (21) by buckle, motor base (25) opposite side protrudes formation trip(ping) lever handle (18) to the top of general frame, there is a follower shaft (23) in the outside of trip(ping) lever handle (18) upper end, abrasive band (24) is connected with between follower shaft (23) and motor output shaft (27).
2. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: described switchgear building (3) is provided with main entrance (5), power supply emergency stop switch (6) above.
3. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: described monolateral supporting base (9) is installed with V-type back-up block (28) respectively by the monolateral support spring sheet (8) that its left and right side two inclination angle is relative.
4. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: the position, axis on described general frame has placed balancing axle (12) by two pairs of mandrel contact bearings (16) on left and right framework (10) are parallel.
5. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 4, is characterized in that: described balancing axle (12) is placed on mandrel contact bearing (16) by the mandrel raceway (13) at its two ends.
6. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: described sensor (34) is connected with vialog (2) by connecting line (33).
7. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: described electric machine support (21) is provided with motor base (25) by installation shaft (17).
8. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: a power lead (22) is stretched out in described motor (26) bottom.
9. the soft monolateral support dynamic balancing machine of a kind of rigid rotator according to claim 1, is characterized in that: the outside of described trip(ping) lever handle (18) upper end adjusts bolt (19) by tense-lax and is fixed with a follower shaft (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310253499.2A CN103413486B (en) | 2013-06-24 | 2013-06-24 | The soft monolateral support dynamic balancing machine of a kind of rigid rotator |
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| CN201310253499.2A CN103413486B (en) | 2013-06-24 | 2013-06-24 | The soft monolateral support dynamic balancing machine of a kind of rigid rotator |
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| CN103413486B true CN103413486B (en) | 2016-01-13 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103606334B (en) * | 2013-12-02 | 2019-05-10 | 新昌县屹然智能科技有限公司 | Mechanical balance experiment instrument |
| CN104318852B (en) * | 2014-11-14 | 2016-09-21 | 重庆理工大学 | A kind of magnetic force dynamic balancing machine |
| 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 |
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| CN2478196Y (en) * | 2001-03-30 | 2002-02-20 | 西安交通大学 | Intelligent teaching test dynamic balancing machine |
| CN101246071A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Shafting dynamic balance experimental bench |
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| CN202393562U (en) * | 2011-12-14 | 2012-08-22 | 上海市计量测试技术研究院 | Supporting type soft bearing and hard bearing integrated multifunctional dynamic balancing machine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5464966B2 (en) * | 2009-10-19 | 2014-04-09 | 株式会社長浜製作所 | Dynamic balance testing machine and vibration part support device |
| JP5818537B2 (en) * | 2011-06-30 | 2015-11-18 | 大和製衡株式会社 | Dynamic balancer for tire and calibration method thereof |
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2013
- 2013-06-24 CN CN201310253499.2A patent/CN103413486B/en not_active Expired - Fee Related
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|---|---|---|---|---|
| CN2478196Y (en) * | 2001-03-30 | 2002-02-20 | 西安交通大学 | Intelligent teaching test dynamic balancing machine |
| CN101246071A (en) * | 2008-02-29 | 2008-08-20 | 西安交通大学 | Shafting dynamic balance experimental bench |
| CN101533580A (en) * | 2009-04-17 | 2009-09-16 | 哈尔滨工业大学 | Dynamic balancing test device of rigid double-disk rotor |
| CN202393562U (en) * | 2011-12-14 | 2012-08-22 | 上海市计量测试技术研究院 | Supporting type soft bearing and hard bearing integrated multifunctional dynamic balancing machine |
Non-Patent Citations (2)
| Title |
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| 软支撑刚性转子动平衡测试系统设计;余先涛;《机械与电子》;20001231;第3卷;第44页-46页 * |
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