CN2217792Y - Speed-regulating ac. electric-power dynamometer - Google Patents
Speed-regulating ac. electric-power dynamometer Download PDFInfo
- Publication number
- CN2217792Y CN2217792Y CN 94242966 CN94242966U CN2217792Y CN 2217792 Y CN2217792 Y CN 2217792Y CN 94242966 CN94242966 CN 94242966 CN 94242966 U CN94242966 U CN 94242966U CN 2217792 Y CN2217792 Y CN 2217792Y
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- CN
- China
- Prior art keywords
- speed
- threephase asynchronous
- control circuit
- slip clutches
- regulating
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- 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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Abstract
The utility model discloses a speed-regulating ac. electric-power dynamometer, which comprises a three-phase asynchronous motor and an electromagnetic slipping clutch. The dynamometer is characterized in that casings of the three-phase asynchronous motor and the electromagnetic slipping clutch are linked as a whole, both ends of the casing of the whole are supported by a bearing bracket, balance arms which are provided with torque measurement apparatuses are arranged at both sides of the motor casing, and a control circuit is connected with the three-phase asynchronous motor and the electromagnetic slipping clutch. The utility model has the advantages of simple structure, accurate and reliable working, low cost, high measuring precision, high stability and favorable effect in energy saving.
Description
The utility model relates to the device of measurement mechanical power, is a kind of device of measuring the original machine power value by the measurement torque value.
Present domestic use power measurement arrangement more, that be used for internal combustion engine is hydraulic dynamometer and eddy current absorption dynamometer, and these two kinds of dynamometers all are medium with water, absorbs the energy that engine sent, and it is become the hot water emission, promptly wastes water, and energy can not reclaim again.In recent years, developed the interchange dynamometer both at home and abroad again, external as Austria " AVL " company, the Carl Schenck AG of Germany, their product has preferable performance, but complex structure, silicon-controlled device is equipped with cost an arm and a leg, and the electric control part branch generating irregularity of wave form height, electricity of poor quality.Domesticly mainly contain two kinds, a kind of is to use the gear case speed change, another kind is to use the electromagnetic slip clutches speed change, these two kinds of variators all are fixed, the power that absorbs in transmitting the moment of torsion process and consume can not directly reflect, and this consumption is to change with the change of load and the passing of time, therefore will demarcate with special instrument, and this can't demarcate and show in actual use at random.With the interchange dynamometer of gear case speed change, can only carry out deciding working condition measurement; With the dynamometer of electromagnetic slip clutches, though can carry out speed governing, efficient is very low, and precision is difficult to guarantee, and as testing tool, can measuring accuracy guarantee and be vital.
The purpose of this utility model provide a kind of simple in structure, measuring accuracy is high, the speed-regulating type alternative current dynamometer of good energy-conserving effect.
Technical solution of the present utility model is: a kind of speed-regulating type alternative current dynamometer, comprise threephase asynchronous and electromagnetic slip clutches, the difference of itself and prior art is: threephase asynchronous and electromagnetic slip clutches shell are connected as a single entity, threephase asynchronous that is connected as a single entity and electromagnetic slip clutches shell two supports are on bearing bracket stand, there is balance arm threephase asynchronous shell both sides, torque-measuring apparatus is housed on the balance arm, has a control circuit to be connected with threephase asynchronous and electromagnetic slip clutches.
Torque-measuring apparatus described in the utility model adopts standard test weight or tension-compression sensor.
Tension-compression sensor described in the utility model has digital displaying meter, wherein comprises in order to eliminate the pulsation influence and to carry out the microcomputer that equalization is handled.Certainly, also can adopt other suitable tension-compression sensors.
Control circuit described in the utility model is made up of threephase asynchronous control and electromagnetic slip clutches exciting current regulating circuit.Certainly, also can adopt other suitable control circuits.
Also comprise overload protecting circuit and diesel engine fault holding circuit in the control circuit described in the utility model.Certainly, also can comprise other appropriate circuit arrangement.
The utility model has the advantages that: simple in structure, cost is low, measuring accuracy is accurate, and reliable and stable, and water not during test can also transfer the mechanical energy of engine to electric energy and be incorporated into the power networks, and energy-saving effect is remarkable, social and economic benefits and good.Can also realize remote control, automatic control, reduce labor intensity, easy for operation.Combine the advantage of domestic two kinds of interchange dynamometers at present, and overcome mutual shortcoming, especially be fit to China's national situation.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of a kind of speed-regulating type alternative current dynamometer of the present utility model.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is the power supply connecting circuit in the utility model.
Fig. 4 is the state control circuit in the utility model.
Fig. 1, Fig. 2 have described an embodiment of the present utility model.The shell of the shell of threephase asynchronous 1 and electromagnetic slip clutches 2 combines as a whole, be that both are as a whole, the axle head of the magnetic pole of electromagnetic slip clutches 2 has a shaft coupling 3 on bearing bracket stand 6 by 5 on bearing respectively at the monolithic case two ends, so that link with internal combustion engines such as tested diesel engines.Shell both sides at threephase asynchronous 1 are fixed with balance arm 7 respectively, and balance arm 7 can be equipped with standard test weight mechanism 9 or install tension-compression sensor 10 additional, and divider 8 plays limit and lives effect.Said mechanism has just formed balance type structure, has guaranteed that the moment of resistance of the moment of torsion that whole dynamometer input end imports into all is reflected on the monolithic case, makes the direct-reading of measuring accuracy and accuracy all obtain guarantee.
In the time will starting tested bavin and survey machine, only need tested diesel engine 4 is linked by shaft coupling 3 and dynamometer, close a main switch, make threephase asynchronous 1 energising, drive the rotation of electromagnetic slip clutches armature, when electromagnetic slip clutches do not pass through exciting current, the magnetic pole of electromagnetic slip clutches is actionless, feed exciting current, just produce interactional electromagnetic force between magnetic pole and armature, make magnetic pole follow armature and begin rotation, increase along with exciting current, the speed that magnetic pole drives diesel engine 4 rotations also constantly raises, and when rotating speed was elevated to 300 rev/mins of left and right sides, dynamometer turned round in the motor mode.
After diesel engine 4 is by starting, exciting current is decreased to zero, makes between the magnetic pole of electromagnetic slip clutches 2 and armature and lose electromagnetic force, at this moment will lose interaction between diesel engine 4 and the threephase asynchronous thereupon, both are independent of each other, separately with rotation speed operation independently.If the rotating speed of tested diesel engine 4 is risen to test speed above threephase asynchronous 1 synchronous rotational speed, simultaneously apply load to diesel engine 4, connect the exciting current of electromagnetic slip clutches 2, the armature of electromagnetic slip clutches 2 is just followed the magnetic pole rotation like this, make the rotor speed of threephase asynchronous 1 also be higher than synchronous rotational speed, at this moment, threephase asynchronous just enters the generator duty, electric energy can be sent into electrical network.
Because threephase asynchronous 1 is connected as a single entity with electromagnetic slip clutches 2, and be bearing on the bearing bracket stand, when machine shaft transmits moment of torsion, the moment of resistance that reflects on the monolithic case and carry-over moment equal and opposite in direction, direction are opposite, this moment (with standard test weight 9 or tension-compression sensor 10) can be easily measured, the power of tested prime mover (diesel engine) can be measured exactly.And numerical value is comparatively accurately with stable.
Fig. 3, Fig. 4 have described the adoptable a kind of control circuit of the utility model.Comprise threephase asynchronous 1 in the dynamometer in the circuit, A.C. contactor C1 and corresponding contact thereof, power meter KW melts disconnected device RD, 1RD, switch DK, DK1, time relay sj 1 and corresponding contact thereof, temperature relay QTA1, pilot lamp D1 etc.Melt disconnected device and temperature relay and can play overload and diesel engine fault protective effect, with the protection motor.
When the utility model adopts tension-compression sensor to survey moment of torsion, can in tension-compression sensor, add the band digital displaying meter, encourage situation in order to eliminate the arteries and veins that ectocine causes, can adopt single-chip microcomputer, with averaging processing, make test result more accurate and stable.
Claims (5)
1, a kind of speed-regulating type alternative current dynamometer, comprise threephase asynchronous and electromagnetic slip clutches, it is characterized in that: threephase asynchronous and electromagnetic slip clutches shell are connected as a single entity, motor that is connected as a single entity and clutch outer member two supports are on bearing bracket stand, there is balance arm the motor casing both sides, torque-measuring apparatus is housed on the balance arm, has a control circuit to be connected with threephase asynchronous and electromagnetic slip clutches.
2, speed-regulating type alternative current dynamometer according to claim 1 is characterized in that: described torque-measuring apparatus adopts standard test weight or tension-compression sensor.
3, speed-regulating type alternative current dynamometer according to claim 2, it is characterized in that: described tension-compression sensor has digital displaying meter, wherein comprises in order to eliminate the pulsation influence and to carry out the microcomputer that equalization is handled.
4, according to claim 1 or 2,3 described speed-regulating type alternative current dynamometers, it is characterized in that: described control circuit is made up of threephase asynchronous control circuit and electromagnetic slip clutches exciting current regulating circuit.
5, speed-regulating type light stream Electric Dynamometer according to claim 4 is characterized in that: also comprise overload protecting circuit and diesel engine fault holding circuit in the described control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94242966 CN2217792Y (en) | 1994-11-22 | 1994-11-22 | Speed-regulating ac. electric-power dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94242966 CN2217792Y (en) | 1994-11-22 | 1994-11-22 | Speed-regulating ac. electric-power dynamometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2217792Y true CN2217792Y (en) | 1996-01-17 |
Family
ID=33849456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94242966 Expired - Fee Related CN2217792Y (en) | 1994-11-22 | 1994-11-22 | Speed-regulating ac. electric-power dynamometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2217792Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998042A (en) * | 2012-12-10 | 2013-03-27 | 重庆青山工业有限责任公司 | Clutch drag torque measuring device |
-
1994
- 1994-11-22 CN CN 94242966 patent/CN2217792Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998042A (en) * | 2012-12-10 | 2013-03-27 | 重庆青山工业有限责任公司 | Clutch drag torque measuring device |
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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 |