CN2382027Y - Instrument for measuring output power of motor - Google Patents
Instrument for measuring output power of motor Download PDFInfo
- Publication number
- CN2382027Y CN2382027Y CN 98244117 CN98244117U CN2382027Y CN 2382027 Y CN2382027 Y CN 2382027Y CN 98244117 CN98244117 CN 98244117 CN 98244117 U CN98244117 U CN 98244117U CN 2382027 Y CN2382027 Y CN 2382027Y
- Authority
- CN
- China
- Prior art keywords
- motor
- detent
- output power
- force
- moving support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a motor output power dynamometer, composed of a force measuring sensor 1, a movable support frame 2, a fixed support frame 3, a brake, etc. The utility model is characterized in that the brake is fixedly arranged; a motor is movably arranged; torque is measured by counter torque of a casing of the motor.
Description
The present invention relates to a kind of motor output power measurement device, i.e. torque, tachometer of measuring (be referred to as to call dynamometer machine usually, hysteresis, asynchronous system, magnetic formula etc. are arranged).
In known hysteresis dynamometer machine, the output torque of measured motor mode shown in accompanying drawing one is measured, by measured motor 1, by shaft joint 2, drive the rotation axis 3 in the detent, drive rotor (also claiming the rotor cup) 4 rotations that are installed on the axle by rotation axis, shown in accompanying drawing one, rotor cup 4 and rotating shaft 3 are mounted in by front end end cover 5, field core 6, among the detent that rear bearing shelves 7 are formed, its supporting mass is two ball bearing 8, therefore rotation axis and rotor cup can rotate freely in detent, but because of the rotor cup is made with hard magnetic material 2J23, be wound with field coil in the field core 6, so when field coil passes to exciting current, field core promptly produces magnetic field, rotor cup by the hard magnetic material manufacturing, in this magnetic field, produce hysteresis effect, damping force that Here it is, just because of this magnetic hysteresis effect, when motor shaft end output torque, 6 pairs of rotor cups of iron core 4 produce damping force, with because iron core 6 and front end end cover 5, rear bearing shelves 7 are to be fixed into an integral body, be installed on the frame 10 by two ball bearing 9, when the little ball bearing 12 of two at the dynamometry fulcrum that force cell 11 is not installed, whole braking physical efficiency rotates freely, after two ball bearing 12 of force cell 11 and dynamometry fulcrum have been installed, its detent just has a counter braking force to the damping force of rotor cup 4, this counter braking force is recorded by force cell exactly, the output power that is to say measured motor is to reflect with output torque and rotating speed, the output power of motor is consumed by detent exactly, converting heat to comes out, just because of become heat by the output power of measured motor, as shown in Figure 1, its force cell 11 that is installed in the detent rear portion just has a temperature variation, this marked change is floated sensor generation temperature, (because of card on the sensor has resistance strain gage, along with the variation of temperature resistance also changes), cause the output electric signal misalignment, influence accuracy of detection, this is an one; It two is heated when sensor, the length N of sensor body then changes (it is elongated to expand), but little because of the frame temperature rise, size L is more stable, then equaling size M shortens, along with shortening of M, it is posted on top foil gauge under identical power effect, and the dependent variable during than cold conditions is little, reduce in response to variable, the also corresponding minimizing of the electric signal of its output causes measurement variation in the test process, influences accuracy of detection.Its three heating because of detent, its heat transferred ball bearing 9 causes bearing inner race to expand, and bearing clearance reduces, and makes in the transmittance process of sensor moment and causes resistance, influences accuracy of detection.
Task of the present invention promptly is these several problems that solve dynamometer machine existence in the past, makes no matter dynamometer machine is in cold conditions, still generates heat after the regular hour of having worked, and its measuring accuracy all meets the requirements.
The present invention is directed to the problem of existence, taked the method for thorough radical cure, change the driven installation of former detent into fixed installation exactly, to then be changed into moving the installation by measured motor from fixed installation, shown in accompanying drawing two, to be installed on the moving support 3 by measured motor, 7 pairs on hard-wired detent is applied adjustable resistive torque by measured motor 4, by the output shaft torque, of measured motor 4 then is that reacting force by motor housing passes to sensor 1, because of sensor 1, bearing 2 is all away from the detent 7 that generates heat, the distance that heat is transmitted is very long, therefore can not cause the temperature rise of sensor, just there has not been temperature float expansion with sensor body yet, bearing 2 also can not cause the minimizing of play because of bigger temperature rise, simultaneously because of being that counter-force with motor housing records by the shaft torque of measured motor, according to the principle that acting force and reacting force equate, its testing result is accurate.
Enforcement of the present invention also is to carry out as the method for accompanying drawing two, has reached the effect of estimating after the enforcement fully, and its zero degree and full scale are more stable, make dynamometer machine precision in the course of the work reach the quiet school of the cold conditions of defined precision in the national standard.
Description of drawings:
Figure one is the structural drawing of existing dynamometer machine.
Number in the figure: 1. by 5. front end end cover 6. field cores of measured motor 2. shaft couplings, 3. rotation axiss, 4. rotors (rotor cup)
7. rear bearing shelves 8. ball bearing 9. ball bearing 10. frames 11. force cells 12. fulcrum rollers
13. base plate
Figure two is a dynamometer machine structural drawing of the present utility model.
Number in the figure: 1. sensor 2. ball bearing 3. moving supports 4. are by measured motor 5. shaft couplings 6. fixed racks 7. detents
8. fulcrum roller
Claims (2)
1, a kind of motor output power tester, form by detent (7), sensor (1), motor mounting rack (3), shaft coupling (5) etc., the mounting bracket that it is characterized in that motor is moving support (3), force cell (1) is mounted on the moving support (3), detent is fixedly mounted on the fixed rack (6), is linked to each other with detent by shaft coupling (5) by measured motor.
2, claim 1 is described, and motor mounting rack is moving support (3), and it is supported by two ball bearing (2), and when motor links to each other with detent (7), motor is applied in load, and its power passes to force cell with the shell counter-force of motor by moving support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98244117 CN2382027Y (en) | 1998-10-08 | 1998-10-08 | Instrument for measuring output power of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98244117 CN2382027Y (en) | 1998-10-08 | 1998-10-08 | Instrument for measuring output power of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382027Y true CN2382027Y (en) | 2000-06-07 |
Family
ID=33990344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98244117 Expired - Fee Related CN2382027Y (en) | 1998-10-08 | 1998-10-08 | Instrument for measuring output power of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382027Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109399A (en) * | 2010-12-21 | 2011-06-29 | 宁波菲仕电机技术有限公司 | Servo motor test bench and test method |
| CN102226728A (en) * | 2011-04-07 | 2011-10-26 | 重庆麦田机电有限公司 | Small-power motor power testing apparatus with power loss-free and wide measuring range properties |
| CN105548880A (en) * | 2015-12-02 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Multifunctional general motor test stand |
-
1998
- 1998-10-08 CN CN 98244117 patent/CN2382027Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109399A (en) * | 2010-12-21 | 2011-06-29 | 宁波菲仕电机技术有限公司 | Servo motor test bench and test method |
| CN102109399B (en) * | 2010-12-21 | 2012-07-25 | 宁波菲仕电机技术有限公司 | Servo motor test bench and test method |
| CN102226728A (en) * | 2011-04-07 | 2011-10-26 | 重庆麦田机电有限公司 | Small-power motor power testing apparatus with power loss-free and wide measuring range properties |
| CN105548880A (en) * | 2015-12-02 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Multifunctional general motor test stand |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |