CN200979557Y - A dynamic stress experiment set - Google Patents
A dynamic stress experiment set Download PDFInfo
- Publication number
- CN200979557Y CN200979557Y CN 200620126415 CN200620126415U CN200979557Y CN 200979557 Y CN200979557 Y CN 200979557Y CN 200620126415 CN200620126415 CN 200620126415 CN 200620126415 U CN200620126415 U CN 200620126415U CN 200979557 Y CN200979557 Y CN 200979557Y
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- disk
- motor
- speed
- tests
- optoelectronic switch
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Abstract
A dynamic stress experimental device employs a free beam or a cantilever beam structure, which comprises a revolution testing system consisting of a speed testing disk, a trough photoelectric switch, and a revolution counter, wherein the speed testing disk with holes synchronously and coaxially rotates with the motor, the disk is fixed on the output axle of the motor, the trough photoelectric switch is installed on the part to be tested by a sole plate, the aperture of the disk is arranged at the circumference of the pan surface which is inserted into the trough of the photoelectric switch, and the trough photoelectric switch outputs the impulse signals to the revolution counter by wires. The utility model enables to accurately measure the revolution of the motor and therefore guarantees the accuracy of the dynamic stress experiment.
Description
Technical field:
The utility model relates to experimental provision, a kind of experimental provision that is used to understand and study the dynamic stress characteristic of member under dynamic load effect of more specifically saying so.
Background technology:
In engineering structures such as machinery, vehicle, building and bridge, exist a large amount of vibrations and shock problem, member in these structures moving (attitude) stress state under dynamic load effect is paid close attention to by people always, also is one of important content of science and engineering class Major " mechanics of materials " course simultaneously.Existing experimental provision is the form that adopts free beam or semi-girder, dynamic loading is realized by eccentric motor, eccentric motor just on the output shaft of motor the setting-up eccentricity mass realize, and change the size and the frequency of dynamic loading by the rotating speed that the input voltage that pressure regulator is adjusted motor changes motor.The measurement mechanism that on conventional device, does not have motor rotary speed, thereby can't directly obtain the actual speed of motor.Though can adopt the method by input voltage conversion motor rotary speed, because motor is when under-voltage, quality can seriously descend, and there is very big error in the rotating speed that obtains by converting.Obviously, can't obtain this important parameter of motor rotary speed, whether the dynamic stress that also just can't confirmatory measurement goes out is correct.
The utility model content:
The utility model is for avoiding above-mentioned existing in prior technology weak point, providing a kind of and can accurately measure motor rotary speed, to guarantee the dynamic stress experimental provision of dynamic stress experiment accuracy.
The technical scheme that the utility model technical solution problem is adopted is:
The utility model is beam with the test specimen, and the test specimen both-end supports or the single-ended cantilever-type that is is supported on the support; Motor is directly installed on the test specimen, is installed with eccentric massblock on the output shaft of motor;
Design feature of the present utility model is that the tachometric survey mechanism that is made of the disk that tests the speed, slot type optoelectronic switch and tachometer gage is set, the described disk that tests the speed is the disk with holes of and synchronous rotation coaxial with motor, the disk that tests the speed is fixedly mounted on the output shaft of motor, and the slot type optoelectronic switch is installed on the test specimen by substrate; The unthreaded hole on the disk of testing the speed is in the periphery of its disc face, and the periphery of the disk that tests the speed of unthreaded hole position is intercalated in the groove of described slot type optoelectronic switch, and slot type optoelectronic switch output pulse signal is sent to tachometer gage by lead.
During motor operations, the disk that tests the speed rotates thereupon, produces pulse signal in the slot type optoelectronic switch, and is sent to tachometer gage by lead, and tachometer gage is converted into the actual speed of motor with this pulse signal, and in advance to show.Direct supply provides operating voltage for slot type optoelectronic switch and tachometer gage.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model can directly obtain the rotating speed exact value of motor under different voltages.The size and the frequency of corresponding dynamic loading can be obtained by the rotating speed that records, thereby the dynamic stress theoretical value of measurement point on free beam or the semi-girder can be obtained.Like this, can compare with the data that dynamic strain indicator records.Thereby guarantee the accuracy of dynamic stress experiment.
2, the speed measuring device in the utility model also can be used in other occasions that need measure motor speed.
Description of drawings:
Fig. 1 adopts the structural representation of free beam for the utility model.
Fig. 2 adopts the structural representation of semi-girder for the utility model
Fig. 3 is the utility model velocity measurement mechanisms structural representation.
Fig. 4 is the utility model disk unthreaded hole synoptic diagram that tests the speed.
Fig. 5 is the utility model tachometric survey electrical block diagram.
Number in the figure: 1 support, 2 direct supplys, 3 tachometer gages, 4 test specimens, 5 pressure regulators, 6 motors, 7 substrates, 8 slot type optoelectronic switches, 9 test the speed disk, 10 eccentric massblocks, 11 connecting rods, 12 unthreaded holes.
Below pass through embodiment, and in conjunction with the accompanying drawings the utility model be further described:
Embodiment:
Figure 1 shows that the version that adopts free beam, is beam with test specimen 4, and the both-end of test specimen 4 is supported on the support 1; Motor 6 is directly installed on the middle part of test specimen 4, is installed with eccentric massblock 10 by connecting rod 11 on the output shaft of motor 6.
Figure 2 shows that the version that adopts semi-girder, is to be beam with test specimen 4 equally, and the single-ended cantilevered that is of test specimen 4 is supported on the support 1.
Referring to Fig. 3 and Fig. 4, the tachometric survey mechanism that setting is made of the disk 9 that tests the speed, slot type optoelectronic switch 8 and tachometer gage 3, the disk 5 that tests the speed is disks with holes of and synchronous rotation coaxial with motor 3, the disk 5 that tests the speed is fixedly mounted on the output shaft of motor 3, and slot type optoelectronic switch 6 is installed on the test specimen 4 as beam by substrate 7; The unthreaded hole 12 on the disk 9 of testing the speed is in the periphery of its disc face, and the periphery of the disk 9 that tests the speed of unthreaded hole 12 positions is intercalated in the groove of slot type optoelectronic switch 8, and slot type optoelectronic switch 8 output pulse signals are sent to tachometer gage 3 by lead.
Referring to Fig. 1, Fig. 2 and Fig. 5, constitute metering circuit by slot type optoelectronic switch 8, direct supply 2 and tachometer gage 3.The positive and negative electrode of the transmitter of slot type optoelectronic switch 8 is connected with the positive and negative electrode of direct supply 2 respectively, and seals in the resistance of suitable resistance in the loop.Output signal with slot type optoelectronic switch 8 connects tachometer gage 3.Tachometer gage 3 adopts connection altogether, and positive source links to each other with the positive pole of direct supply.
In concrete the enforcement, pressure regulator 5 should be set routinely, be used to change motor 6 input voltages, thereby change the rotating speed of motor 6.
Claims (1)
1, dynamic stress experimental provision, the version of employing free beam or semi-girder is beam with test specimen (4), test specimen (4) supports for both-end or the single-ended cantilever-type that is is supported on the support (1); Motor (6) is directly installed on the test specimen (4), is installed with eccentric massblock (10) on the output shaft of motor (6); It is characterized in that being provided with the tachometric survey mechanism that constitutes by the disk that tests the speed (9), slot type optoelectronic switch (8) and tachometer gage (3), the described disk that tests the speed (9) is the disk with holes of and synchronous rotation coaxial with motor (6), the disk (9) that tests the speed is fixedly mounted on the output shaft of motor (6), and slot type optoelectronic switch (8) is installed on the test specimen (4) by substrate (7); The unthreaded hole (12) on the disk (9) of testing the speed is in the periphery of its disc face, the periphery of the disk that tests the speed (9) of unthreaded hole (12) position is intercalated in the groove of described slot type optoelectronic switch (8), and slot type optoelectronic switch (8) output pulse signal is sent to tachometer gage (3) by lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126415 CN200979557Y (en) | 2006-10-14 | 2006-10-14 | A dynamic stress experiment set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620126415 CN200979557Y (en) | 2006-10-14 | 2006-10-14 | A dynamic stress experiment set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200979557Y true CN200979557Y (en) | 2007-11-21 |
Family
ID=38979938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620126415 Expired - Fee Related CN200979557Y (en) | 2006-10-14 | 2006-10-14 | A dynamic stress experiment set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200979557Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808479A (en) * | 2014-02-25 | 2014-05-21 | 南京捷诺环境技术有限公司 | Standard sample for verifying vibration testing capacity |
-
2006
- 2006-10-14 CN CN 200620126415 patent/CN200979557Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103808479A (en) * | 2014-02-25 | 2014-05-21 | 南京捷诺环境技术有限公司 | Standard sample for verifying vibration testing capacity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071121 Termination date: 20101014 |