CN85100047A - The fan blade dynamic balancing machine of band microprocessor system - Google Patents
The fan blade dynamic balancing machine of band microprocessor system Download PDFInfo
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- CN85100047A CN85100047A CN 85100047 CN85100047A CN85100047A CN 85100047 A CN85100047 A CN 85100047A CN 85100047 CN85100047 CN 85100047 CN 85100047 A CN85100047 A CN 85100047A CN 85100047 A CN85100047 A CN 85100047A
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- dynamic balancing
- fan blade
- balancing machine
- machine according
- rods
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Abstract
A kind of fan blade dynamic balancing machine with microprocessor system belongs to the fan blade dynamic balancing machine field.Characteristics of the present invention are that mechanical system adopts flexible elastic support rod device, have three degree of freedom, it can responsive fan blade because of the out-of-balance force of mass eccentricity and the asymmetric generation of fan blade.Adopt non-contact eddy current sensor in the test macro, to the auto-tracking filter circuit in the testing tool done temperature compensation, waveform changing circuit has been done phase compensation.In the vibration signal processing device, be furnished with microsystem, directly calculate the size and the position of printing unbalanced weight, good balance effect, production efficiency height.
Description
The present invention relates to the electric fan blade dynamic balancing machine.
Electric fan is a middling speed rotation class machinery, and rotary body is dimerous by rotor and blade.Rotor and fan blade imbalance are the main causes that causes vibration, wherein because the flabellum radius is big, moment of inertia is big, therefore the flabellum imbalance is the principal contradiction that causes vibration, the vibration of electric fan can cause friction, the wearing and tearing of movement parts, and this can shorten the life-span of electric fan greatly, moreover, vibration can cause noise, and the vibration problem that therefore solves electric fan is one of problem of being concerned about the most of electric fan factory.
For addressing this problem, common way is carried out transient equilibrium to fan blade.The EVP-10.1 type single face vertical dynamic balancing machine that Japan's " Tianjin, island Huffman " produces is exactly a kind of equilibrator that is used for the balance electric fan blade, its structure as shown in Figure 1, (1) be base, (2) are spring leafs, and (3) are motors, (4) be motor shaft, (5) be flabellum, (6) are sensors, and this equilibrator is the one degree of freedom system, it can only the balance fan blade mass unbalance, it can't solve because the asymmetric vibration that cause of three blades in the technology allowed band of fan blade.
The objective of the invention is to provide a kind of advanced person's fan fan blade dynamic balancing machine, the vibration that it not only can the mass unbalance of balance fan blade causes, and can the asymmetric vibration that causes of overall equilbrium fan blade in margin tolerance.
Mechanical system of the present invention has changed the method for designing of traditions of the past, adopts flexible elastic support rod device, and this device is two systems with one degree of freedom, it can responsive fan blade because the power of mass unbalance and the asymmetric generation of fan blade.
Measuring system of the present invention has been carried out temperature compensation to field effect transistor in narrow band tracking filter, in waver reference signal has been carried out phase compensation, and pulse makes measurement result accurate, stable as degree to adopt 720fn.
Signal processing system of the present invention adopts a kind of resolver (comprising single card microcomputer, interface circuit, printer) and system software, and it can be determined to add the hole number of repeated hole automatically and add weight, and prints on printer and resolve the result.
Fig. 2 is the schematic diagram of rods elastic bearing fan blade dynamic balancing machine mechanical part.Rotating shaft (8) is a rods, and when acting on unbalanced wind-force and centrifugal intertia force on the fan blade, bar will be out of shape, and the size of distortion is decided by the length of bar, the rigidity of the position of supporting-point and front support bracket (7).Front support bracket (7) is an elastic support, and its rigidity value is higher than general soft support dynamic balancing machine, is lower than the support stiffness of hard support dynamic balancing machine.The working condition of electric fan of the various models of different electric fan factory production just can be simulated in the position of regulating diameter, length, the supporting-point of rods.The natural frequency of vibration of mechanical system should satisfy 0.6＜ω/ω
n＜0.8, ω is a working speed, ω
nBe the critical rotary speed of system.The diameter of rods is φ 9～φ 11mm, and length is controlled at 300～320mm, and through modified R
c28～26, quenching HRC40, material adopts T8A.Amplitude measurement adopts non-contact eddy current sensor (9), and its sensitivity should guarantee 〉=50mV/ μ.
Fig. 3 is the narrow band filter schematic diagram, and it is the part of phase place, amplitude measurement circuit.The signal that sensor records is measured its amplitude, phase place, I among the figure through auto-tracking filter circuit
C1I
C2, IC
3Be three-stage operational amplifier, T
1, T
2Be field effect transistor, f
0Be gating pulse, R
tFor compensation is 3.3-4.7K Ω with its numerical value of thermal sensing element.Compensation back phase megadyne temperature float be 0.03 ° of %/℃.
Fig. 4 is a waver, and it also is the part of phase place, amplitude measurement circuit.IC wherein
1Be operational amplifier, IC
2Be this schmitt trigger, C
pFor its value of phase compensation electric capacity is 2000-2400pF.Compensation back phase error＜2 °.
Fig. 5 is the part of phase place display circuit, wherein IC
1, IC
2, IC
4Be frequency divider, IC
3It is main door.P is a phase impulse, and 720fn is number of degrees pulse, gets average 5 times, is guaranteeing that sample rate doubles under the equal accuracy, has therefore guaranteed measuring accuracy.
The amplitude that is recorded by test macro, phase place, tach signal be by resolver, calculates and print the hole number that adds repeated hole and add weight.This resolver is formed (11) by single card microcomputer, interface circuit and printer.
Fig. 6 is a resolver system software process flow diagram.First frame wherein, the dish that increases the weight of in corresponding 9,10,1215 holes is provided with start key respectively.Second frame is to programmable parallel interface (PI
0) and the given initial parameter of programmable timer (CTC).Third and fourth frame is sampled to the analog quantity of unbalanced amplitude (G) and phase place (Q), is converted to digital quantity and sends into internal memory.Regularly use interrupt mode 2 with sampling.The 5th frame according to phase place and pitch of holes β, is extrapolated and is added repeated hole N, N+1 and angle α thereof.Six, seven frames according to the resolution of force principle, with uneven amplitude G, decompose N, and N+1 goes in the hole, calculates G
1, G
2Two add weight.The 8th frame is raw data G, Q and resolve N as a result, N+1, G
1, G
2Deliver to print zone, and get the result.
The mechanical system of this equilibrator adopts the working condition of two degree of freedom analog electrical fans, can carry out overall equilbrium to the imbalance that mass eccentricity and wind-force cause, adopt noncontact high-sensitivity vortex flow sensor, test macro and signal Processing, as long as just can find out the position and the size that should increase the weight of by a point measurement.Qualification rate brings up to 95% from original 70%, and efficient is brought up to original 2.8 times.
Claims (6)
1, a kind of fan dynamic machine is made up of mechanical system, display instrument and sensor, it is characterized in that mechanical part has adopted rods [8], elastic bearing [7], adopt the narrow-band percolation device temperature compensation in the display instrument circuit, wave converter phase compensation, phase place shows employing 720fn as the degree pulse, and signal processing system TP801 single card microcomputer resolves, and sensor adopts non-contact sensor.
2, dynamic balancing machine according to claim 1 is characterized in that rods (8), the system that elastic bearing (7) and fan blade (10) constitute, and it is 0.6＜ω/ω that the natural frequency of vibration of system should satisfy
n＜0.8.
3, dynamic balancing machine according to claim 2 is characterized in that the diameter D=9～11mm of rods, and its length is controlled at 300～320mm, and material adopts T8A or same type of material, modified Rc30～25, quenching HRc40.
4, dynamic balancing machine according to claim 1, it is characterized in that with thermal sensing element narrow band filter being done temperature compensation in the display instrument, its numerical value is 3.3～4.7K Ω, with mica capacitor reference signal being made its numerical value of phase compensation is 2000～2400PF, phase place shows that employing 720fn is as the degree pulse, 1 ° of display precision, phase error be 0.03 ° of %/℃.
5, dynamic balancing machine according to claim 1 is characterized in that adopting non-contact eddy current sensor, sensitivity 〉=50mV/ μ.
6, dynamic balancing machine according to claim 1 is characterized in that analog signal conversion is a digital quantity, and according to increasing the weight of to coil pass, computing machine (11) is determined to add the hole number of repeated hole automatically and added weight and print on printer and resolve the result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100047A CN85100047B (en) | 1985-04-01 | 1985-04-01 | The fan blade dynamic balancing machine of band microprocessor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100047A CN85100047B (en) | 1985-04-01 | 1985-04-01 | The fan blade dynamic balancing machine of band microprocessor system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100047A true CN85100047A (en) | 1985-10-10 |
| CN85100047B CN85100047B (en) | 1985-10-10 |
Family
ID=4790843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100047A Expired CN85100047B (en) | 1985-04-01 | 1985-04-01 | The fan blade dynamic balancing machine of band microprocessor system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100047B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539072A (en) * | 2012-01-18 | 2012-07-04 | 山东电力研究院 | Field dynamic balance measuring device and method for utility boiler side fan |
| CN108956012A (en) * | 2018-10-10 | 2018-12-07 | 安徽正华电气有限公司 | A kind of batch detection motor blower fan dynamic poise device |
| CN110871341A (en) * | 2018-08-31 | 2020-03-10 | 蒂森克虏伯发动机系统(大连)有限公司 | Method for producing toothed camshaft |
-
1985
- 1985-04-01 CN CN85100047A patent/CN85100047B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102539072A (en) * | 2012-01-18 | 2012-07-04 | 山东电力研究院 | Field dynamic balance measuring device and method for utility boiler side fan |
| CN102539072B (en) * | 2012-01-18 | 2014-12-10 | 山东电力研究院 | Field dynamic balance measuring device and method for utility boiler side fan |
| CN110871341A (en) * | 2018-08-31 | 2020-03-10 | 蒂森克虏伯发动机系统(大连)有限公司 | Method for producing toothed camshaft |
| CN108956012A (en) * | 2018-10-10 | 2018-12-07 | 安徽正华电气有限公司 | A kind of batch detection motor blower fan dynamic poise device |
| CN108956012B (en) * | 2018-10-10 | 2020-04-24 | 安徽正华电气有限公司 | Dynamic balance device for detecting motor fan blades in batches |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100047B (en) | 1985-10-10 |
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