CN109061469B - Ultrasonic motor life test platform - Google Patents
Ultrasonic motor life test platform Download PDFInfo
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- CN109061469B CN109061469B CN201810954267.2A CN201810954267A CN109061469B CN 109061469 B CN109061469 B CN 109061469B CN 201810954267 A CN201810954267 A CN 201810954267A CN 109061469 B CN109061469 B CN 109061469B
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- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 239000006247 magnetic powder Substances 0.000 abstract description 8
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to an ultrasonic motor life test platform, which comprises a base, wherein an ultrasonic motor is arranged on the base, a motor shaft sleeve is sleeved on a motor shaft of the ultrasonic motor, and the ultrasonic motor life test platform also comprises a transmission shaft, one end of the transmission shaft is connected with the motor shaft sleeve through a first coupler, the other end of the transmission shaft is communicated with a variable load module through a second coupler, and the load is continuously variable through the variable load module; the motor mounting plate is characterized by further comprising a sleeve structure which is arranged at the central position of the motor mounting plate, wherein the sleeve structure is sheathed at the connecting position of the first coupler and the motor shaft sleeve, and the sleeve structure, the first coupler and the motor shaft sleeve are coaxially arranged; the ultrasonic motor also comprises a mechanical property measuring module which is used for measuring the torque, the rotating speed and the temperature of the ultrasonic motor when in operation; the invention solves the problems of low measurement accuracy or short service life caused by a magnetic powder brake due to the use of a friction plate of the conventional test platform.
Description
Technical Field
The invention relates to an ultrasonic motor life test platform, and belongs to the field of motor test platforms.
Background
The ultrasonic motor is a novel micro-special motor which utilizes the inverse piezoelectric effect of piezoelectric ceramics and the friction coupling of a motor stator and a motor rotor to realize motor driving, has the advantages of quick response, high positioning precision, low-speed large torque, power-off self-locking, no interference of magnetic fields and the like, and has wider application prospects in the fields of aerospace, medical appliances, precise instruments, novel weaponry and the like. Therefore, in practical application, the service life of the ultrasonic motor is an important index for meeting the working requirements, especially for some service scenes with special loads and high requirements on the service life of the motor.
In view of this, the life test experiment of the ultrasonic motor is important to researching various mechanical properties of the ultrasonic motor in the specific working condition life time and the motor life stage, at present, the existing life test is mostly that a load is provided by a magnetic powder brake or a friction device composed of friction rotating plates, although the magnetic powder brake proposed by the invention patent 201310455638.X can provide a relatively constant load, for some working conditions requiring continuous change of the load, the magnetic powder brake can cause larger temperature change of the magnetic powder due to continuous irregular movement of the magnetic powder, so that the service life of the magnetic powder brake is reduced, and the long-term motor life test requirement cannot be met;
the friction device proposed in patent 201710700274.5 changes the load by adjusting the self friction force, but the friction plate is severely worn after long-term working, the required friction force cannot be continuously provided, and meanwhile, a large amount of heat is accumulated on the friction device due to the action of friction heat generation, so that the corresponding components in the friction device are deformed and damaged.
Disclosure of Invention
The invention provides an ultrasonic motor life test platform, which solves the problems of low measurement accuracy or short life caused by a magnetic powder brake due to the use of a friction plate of the existing test platform.
The technical scheme adopted for solving the technical problems is as follows:
The ultrasonic motor life test platform comprises a base, an ultrasonic motor is arranged on the base, a motor shaft sleeve is sleeved on a motor shaft of the ultrasonic motor, and the ultrasonic motor life test platform further comprises a transmission shaft, one end of the transmission shaft is connected with the motor shaft sleeve through a first coupler, the other end of the transmission shaft is communicated with a variable load module through a second coupler, and the load is continuously variable through the variable load module;
The motor mounting plate is characterized by further comprising a sleeve structure which is arranged at the central position of the motor mounting plate, wherein the sleeve structure is sheathed at the connecting position of the first coupler and the motor shaft sleeve, and the sleeve structure, the first coupler and the motor shaft sleeve are coaxially arranged;
the ultrasonic motor also comprises a mechanical property measuring module which is used for measuring the torque, the rotating speed and the temperature of the ultrasonic motor when in operation;
As a further preferred aspect of the present invention, the variable load module includes a load wheel, a center position of the load wheel is inserted through a load supporting shaft, two sliding grooves symmetrical to the center of the load wheel are radially formed in the load wheel, at least one eccentric balancing weight is installed in the sliding grooves symmetrical to both sides of the load wheel, and the total number of the eccentric balancing weights is a multiple of 2;
As a further preferred aspect of the present invention, the load supporting shaft is provided with a first bearing housing and a second bearing housing at both ends thereof, respectively, and the load supporting shaft is supported by the first bearing housing and the second bearing housing;
as a further preferable mode of the invention, the invention further comprises a third bearing seat and a fourth bearing seat which are respectively arranged at two ends of the transmission shaft;
the sleeve structure of the motor mounting plate is mounted on the fifth bearing seat in a matched manner through a bearing;
As a further preferred aspect of the present invention, the aforementioned mechanical property measurement module includes a pressure sensor, a photoelectric switch sheet, a photoelectric switch and a thermistor, the top of the pressure sensor is fixedly connected with the side of the motor mounting plate by a screw, and the bottom thereof is fixed on the base by a sensor bracket;
The photoelectric switch sheet is arranged at a shaft shoulder of the transmission shaft, which is close to the fourth bearing seat, through a fixing nut, and the photoelectric switch is arranged on the fourth bearing seat;
The thermistor is arranged on the ultrasonic motor;
as a further preferable mode of the invention, the load wheel disc and the load supporting shaft are connected through keys, and the length of the sliding groove is 0.4-0.8 times of the diameter of the load wheel disc;
as a further preferable mode of the invention, the eccentric balancing weight is of a cylindrical structure, a circular through hole is formed in the center of the eccentric balancing weight, and tungsten steel or tungsten copper alloy materials are selected for manufacturing the eccentric balancing weight;
The two symmetrical sliding grooves on the two sides of the load wheel disc are respectively provided with an eccentric balancing weight, the fixed bolt penetrates through the eccentric balancing weight on one side of the eccentric balancing weight, and the fixed bolt is fixedly connected with the eccentric balancing weight on the other side through a nut;
as a further preferred aspect of the present invention, the sleeve structure is a hollow cylindrical structure having an inner diameter larger than an outer diameter of the first coupling.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
The eccentric distance between the eccentric balancing weight and the load wheel disc can be changed by adjusting the position of the eccentric balancing weight in the chute, and the length of the arm of force corresponding to the maximum torque is changed accordingly, so that the effect of changing the maximum torque is achieved;
when the load wheel disc and the ultrasonic motor rotate simultaneously, the horizontal distance between the eccentric balancing weight and the center of the load wheel disc changes periodically, and the length of a moment arm corresponding to the continuously variable torque also changes accordingly, so that the effect of continuously variable load is realized;
The bearing seat connected with the motor mounting plate can eliminate the eccentric torsion quantity generated between the motor shaft and the transmission shaft of the ultrasonic motor when the motor shaft of the ultrasonic motor is connected with the coupling, so that the motor shaft and the transmission shaft are concentric, and the error caused by the eccentric measurement on the mechanical characteristics is reduced.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the overall structure of an ultrasonic motor life test platform according to a preferred embodiment of the present invention;
FIG. 2 is a schematic view of a front view partially in section of an ultrasonic motor life test platform according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of the load sheave structure of an ultrasonic motor life test platform according to a preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of the eccentric weight of the ultrasonic motor life test platform according to the preferred embodiment of the present invention;
Fig. 5 is a schematic diagram of the motor mounting plate structure of the ultrasonic motor life test platform according to the preferred embodiment of the present invention.
In the figure: 1 is a first bearing seat, 2 is a load wheel disc, 3 is an eccentric balancing weight, 4 is a second bearing seat, 5 is a second coupling, 6 is a third bearing seat, 7 is a transmission shaft, 8 is a fourth bearing seat, 9 is a photoelectric switch sheet, 10 is a photoelectric switch, 11 is a fifth bearing seat, 12 is a motor mounting plate, 13 is a screw, 14 is an ultrasonic motor, 15 is a thermistor, 16 is a pressure sensor, 17 is a sensor bracket, 18 is a base, 19 is a first coupling, 20 is a motor shaft sleeve, 21 is a load supporting shaft, 22 is a chute, 23 is a circular through hole, and 24 is a sleeve structure.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
As shown in fig. 1-5, the present invention includes the following features: 1 is a first bearing seat, 2 is a load wheel disc, 3 is an eccentric balancing weight, 4 is a second bearing seat, 5 is a second coupling, 6 is a third bearing seat, 7 is a transmission shaft, 8 is a fourth bearing seat, 9 is a photoelectric switch sheet, 10 is a photoelectric switch, 11 is a fifth bearing seat, 12 is a motor mounting plate, 13 is a screw, 14 is an ultrasonic motor, 15 is a thermistor, 16 is a pressure sensor, 17 is a sensor bracket, 18 is a base, 19 is a first coupling, 20 is a motor shaft sleeve, 21 is a load supporting shaft, 22 is a chute, 23 is a circular through hole, and 24 is a sleeve structure.
1-2, The ultrasonic motor life test platform comprises a base, an ultrasonic motor is arranged on the base, a motor shaft sleeve is sleeved on a motor shaft of the ultrasonic motor, and a transmission shaft is further arranged on the motor shaft of the ultrasonic motor, one end of the transmission shaft is connected with the motor shaft sleeve through a first coupler, the other end of the transmission shaft is communicated with a variable load module through a second coupler, and load continuous variation is realized through the variable load module;
The motor mounting plate is characterized by further comprising a sleeve structure which is arranged at the central position of the motor mounting plate, wherein the sleeve structure is sheathed at the connecting position of the first coupler and the motor shaft sleeve, and the sleeve structure, the first coupler and the motor shaft sleeve are coaxially arranged;
the ultrasonic motor also comprises a mechanical property measuring module which is used for measuring the torque, the rotating speed and the temperature of the ultrasonic motor when in operation;
As a further preferred embodiment of the present invention, as shown in fig. 3 to fig. 4, the variable load module includes a load wheel disc, the center of the load wheel disc is inserted with a load supporting shaft, two sliding grooves symmetrical to the center of the load wheel disc are radially formed on the load wheel disc, at least one eccentric balancing weight is installed in the sliding grooves symmetrical to the two sides of the load wheel disc, and the total number of the eccentric balancing weights is a multiple of 2;
When the load wheel disc and the ultrasonic motor coaxially rotate, the horizontal distance between the eccentric balancing weight and the center of the load wheel disc can continuously and periodically change along with time, and meanwhile, the torque generated by the eccentric balancing weight also continuously changes so as to meet the specific working condition requirements in actual work.
As a further preferred aspect of the present invention, the load supporting shaft is provided with a first bearing housing and a second bearing housing at both ends thereof, respectively, and the load supporting shaft is supported by the first bearing housing and the second bearing housing;
as a further preferable mode of the invention, the invention further comprises a third bearing seat and a fourth bearing seat which are respectively arranged at two ends of the transmission shaft;
The sleeve structure of the motor mounting plate is mounted on the fifth bearing seat in a matched manner through a bearing; the motor mounting plate is provided with mounting holes with different sizes, and the motor shaft sleeve are connected in an inserting way, so that ultrasonic motors with different types can be conveniently replaced and mounted; the eccentric amount can be generated when the motor shaft is connected with the first coupler, so that the motor shaft and the transmission shaft are not concentric, and the fifth bearing seat connected with the motor mounting plate can correct the eccentric amount generated when the motor shaft is connected with the transmission shaft, so that the motor shaft and the transmission shaft are concentric.
As a further preferred aspect of the present invention, the aforementioned mechanical property measurement module includes a pressure sensor, a photoelectric switch sheet, a photoelectric switch and a thermistor, the top of the pressure sensor is fixedly connected with the side of the motor mounting plate by a screw, and the bottom thereof is fixed on the base by a sensor bracket;
The photoelectric switch sheet is arranged at a shaft shoulder of the transmission shaft, which is close to the fourth bearing seat, through a fixing nut, and the photoelectric switch is arranged on the fourth bearing seat;
The thermistor is arranged on the ultrasonic motor;
as a further preferable mode of the invention, the load wheel disc and the load supporting shaft are connected through keys, and the length of the sliding groove is 0.4-0.8 times of the diameter of the load wheel disc;
as a further preferable mode of the invention, the eccentric balancing weight is of a cylindrical structure, a circular through hole is formed in the center of the eccentric balancing weight, and tungsten steel or tungsten copper alloy materials are selected for manufacturing the eccentric balancing weight;
the two symmetrical sliding grooves on the two sides of the load wheel disc are respectively provided with an eccentric balancing weight, the fixed bolt penetrates through the eccentric balancing weight on one side of the eccentric balancing weight, and the fixed bolt is fixedly connected with the eccentric balancing weight on the other side through a nut; the eccentric distance between the center of the eccentric balancing weight and the center of the load wheel disc can be changed by radially moving the position of the eccentric balancing weight through the adjusting bolt, so that the purpose of adjusting the maximum torque generated by the eccentric balancing weight is achieved.
As a further preferred aspect of the present invention, the sleeve structure is a hollow cylinder structure having an inner diameter larger than an outer diameter of the first coupling to ensure normal rotation of the motor shaft, the motor shaft sleeve, the first coupling and the transmission shaft.
The specific operation method using the test platform is as follows:
The first step: inserting a motor shaft of an ultrasonic motor into a motor shaft sleeve, and fixing the ultrasonic motor on a motor mounting plate through a mounting hole on the motor mounting plate;
And a second step of: symmetrically arranging two eccentric balancing weights with the same size on two sides of a chute of a load wheel disc, enabling a fixing bolt to pass through a circular through hole in the center of the eccentric balancing weights and the load wheel disc, radially moving the fixing bolt in the chute according to actual working condition requirements, adjusting eccentricity, setting maximum load torque, screwing a fixing nut, and fixing the position of the eccentric balancing weights;
And a third step of: setting the rotating speed, the working time and the stopping time of the motor according to specific working condition requirements, and sending a command to a lower computer through an upper computer to control the ultrasonic motor to work;
fourth step: starting an ultrasonic motor, wherein in the operation process of the ultrasonic motor, the output torque is multiplied by the horizontal distance between a motor shaft of the ultrasonic motor and a screw hole by a pressure value measured by a pressure sensor, when a switch piece of a photoelectric switch piece fixed on a transmission shaft rotates synchronously with the motor shaft of the ultrasonic motor, the running speed of the ultrasonic motor is measured by a photoelectric switch arranged on a fifth bearing seat through the rotation of the switch piece of the photoelectric switch piece, and the temperature of the ultrasonic motor is measured by a thermistor clung to a motor shell; the data are displayed by the upper computer and synchronously stored in the computer so as to analyze the change of various mechanical characteristics in the operation process of the ultrasonic motor while carrying out life test.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present application means that each exists alone or both exist.
"Connected" as used herein means either a direct connection between components or an indirect connection between components via other components.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (5)
1. The utility model provides an ultrasonic motor life-span test platform, includes the base, installs ultrasonic motor on the base, overlaps on ultrasonic motor's motor shaft and establishes motor shaft sleeve, its characterized in that: the variable load device also comprises a transmission shaft, wherein one end of the transmission shaft is connected with the shaft sleeve of the motor shaft through a first coupler, the other end of the transmission shaft is communicated with the variable load module through a second coupler, and the load is continuously variable through the variable load module;
The motor mounting plate is characterized by further comprising a sleeve structure which is arranged at the central position of the motor mounting plate, wherein the sleeve structure is sheathed at the connecting position of the first coupler and the motor shaft sleeve, and the sleeve structure, the first coupler and the motor shaft sleeve are coaxially arranged;
the ultrasonic motor also comprises a mechanical property measuring module which is used for measuring the torque, the rotating speed and the temperature of the ultrasonic motor when in operation;
The variable load module comprises a load wheel disc, a load supporting shaft is inserted in the center position of the load wheel disc, two sliding grooves which are symmetrical relative to the center of the load wheel disc are formed in the load wheel disc along the radial direction, at least one eccentric balancing weight is arranged in each sliding groove which is symmetrical on two sides of the load wheel disc, and the total number of the eccentric balancing weights is a multiple of 2;
When the load wheel disc and the ultrasonic motor coaxially rotate, the horizontal distance between the eccentric balancing weight and the center of the load wheel disc continuously and periodically changes along with time, and meanwhile, the torque generated by the eccentric balancing weight also continuously changes;
the two ends of the load supporting shaft are respectively provided with a first bearing seat and a second bearing seat, and the load supporting shaft is supported by the first bearing seat and the second bearing seat;
the transmission shaft is provided with a transmission shaft, and the transmission shaft is provided with a first bearing seat and a second bearing seat;
the sleeve structure of the motor mounting plate is mounted on the fifth bearing seat in a matched manner through a bearing;
The bearing seat connected with the motor mounting plate can eliminate the eccentric torsion quantity generated between the motor shaft and the transmission shaft of the ultrasonic motor when the motor shaft of the ultrasonic motor is connected with the coupling, so that the motor shaft and the transmission shaft are concentric, and the error caused by the eccentric measurement on the mechanical characteristics is reduced.
2. The ultrasonic motor life test platform of claim 1, wherein: the mechanical characteristic measuring module comprises a pressure sensor, a photoelectric switch sheet, a photoelectric switch and a thermistor,
The top of the pressure sensor is fixedly connected with the side edge of the motor mounting plate through a screw, and the bottom of the pressure sensor is fixed on the base through a sensor bracket;
The photoelectric switch sheet is arranged at a shaft shoulder of the transmission shaft, which is close to the fourth bearing seat, through a fixing nut, and the photoelectric switch is arranged on the fourth bearing seat;
the thermistor is mounted on the ultrasonic motor.
3. The ultrasonic motor life test platform of claim 1, wherein: the load wheel disc is connected with the load supporting shaft through a key, and the length of the sliding groove is 0.4-0.8 times of the diameter of the load wheel disc.
4. The ultrasonic motor life test platform of claim 1, wherein: the eccentric balancing weight is of a cylindrical structure, a circular through hole is formed in the center of the eccentric balancing weight, and tungsten steel or tungsten copper alloy materials are selected for manufacturing the eccentric balancing weight;
And the two symmetrical sliding grooves on two sides of the load wheel disc are respectively provided with an eccentric balancing weight, the fixing bolt penetrates through the eccentric balancing weight on one side of the eccentric balancing weight, and the fixing bolt is fixedly connected with the eccentric balancing weight on the other side through a nut.
5. The ultrasonic motor life test platform of claim 1, wherein: the sleeve structure is a hollow cylinder structure, and the inner diameter of the sleeve structure is larger than the outer diameter of the first coupler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810954267.2A CN109061469B (en) | 2018-08-21 | 2018-08-21 | Ultrasonic motor life test platform |
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| CN201810954267.2A CN109061469B (en) | 2018-08-21 | 2018-08-21 | Ultrasonic motor life test platform |
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| CN109061469A CN109061469A (en) | 2018-12-21 |
| CN109061469B true CN109061469B (en) | 2024-05-17 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109633445B (en) * | 2019-01-29 | 2020-11-17 | 吉林工程技术师范学院 | New energy automobile motor testboard |
| CN114486038A (en) * | 2022-03-01 | 2022-05-13 | 北京牧风科技有限公司 | Motor shaft material stress detection device |
| CN116164885B (en) * | 2023-04-23 | 2023-07-21 | 四川富生汽车零部件有限公司 | Motor life test fixture |
| CN118226255B (en) * | 2024-05-27 | 2024-07-19 | 河南康源电力工程有限公司 | Motor detection device |
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| CN204202792U (en) * | 2014-09-24 | 2015-03-11 | 江苏丰科超声电机科技有限公司 | A kind of Novel ultrasonic dynamo dynamometer machine |
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