CN101303259A - Electromagnetic clutch dynamic torque automatic test method and apparatus of automobile air conditioner compressor - Google Patents
Electromagnetic clutch dynamic torque automatic test method and apparatus of automobile air conditioner compressor Download PDFInfo
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- CN101303259A CN101303259A CNA2007100543883A CN200710054388A CN101303259A CN 101303259 A CN101303259 A CN 101303259A CN A2007100543883 A CNA2007100543883 A CN A2007100543883A CN 200710054388 A CN200710054388 A CN 200710054388A CN 101303259 A CN101303259 A CN 101303259A
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Abstract
The present invention provides an automatic test method and apparatus for vehicle air conditioner compressor electromagnetic clutch dynamic torsional moment, comprising a mainly supporting component (2), a torque revolution speed transducer (3), an electric eddy current dynamometer (4) and an electrical control system, wherein the electromagnetic clutch (1) is installed on the left end of the supporting component to form a cantilever structure, and is driven to rotate through a belt pulley of the electromagnetic clutch driven by a frequency conversion motor; the right end of the supporting component is linked with the torque revolution speed transducer and the electric eddy current dynamometer separately by a coupling, the torque revolution speed transducer and the electric eddy current dynamometer are both installed on each seat to ensure the axiality to be consistent with the supporting component main shaft. The automatic test method and apparatus can simulate air conditioner electromagnetic clutch actual use condition factually, test dynamic parameter variation regularity with the existing of revolution speed spectrum and torque loading spectrum, observe and research dynamic procedure in full, and provide science foundation for evaluating performance, lifetime and reliability thereof.
Description
Technical field
The invention belongs to electromagnetic clutch for compressor testing equipment technical field, specially refer to automatic test method of a kind of automobile air conditioner compressor electromagnetic clutch dynamic torque and device.
Background technology
Automobile air conditioner compressor generally is installed in the next door of motor car engine, drives it by its sustainer or donkey engine through belt pulley.Except that part is directly driven by donkey engine, link to each other with engine belt pulley by the belt (1.2) on the compressor of air conditioner electromagnetic clutch belt pulley (1.3) mostly.When clutch solenoid (1.4) cut off the power supply, clutch coupling was separated with the electromagnetic clutch belt pulley by spring friction plate assembly (1.1), and Fig. 1 is seen in clutch pulley (1.3) idle running; When clutch solenoid (1.4) is switched on, electromagnetic force makes clutch pulley (1.3) and spring friction plate assembly (1.1) adhesive, the moment of torsion that engine spreads out of, contact the moment of torsion that engine is spread out of by the frictional disk on the belt pulley (1.3) with clutch plate spring friction plate assembly (1.1) and pass to compressor rotation shaft, see Fig. 2.There is profile line partly to be rotary part among Fig. 1, Fig. 2.
At present, the measuring method of automobile air conditioner compressor electromagnetic clutch moment of torsion is: manually with the fixing chucking of electromagnetic clutch belt pulley, allow after the clutch solenoid energising, measure moment of torsion with dial torque wrench.
This single individual event manual test mode, the science that is difficult to reflects that accurately the air-conditioning electromagnetic clutch is in dynamic property, life parameter indexs such as different rotating speeds, different loads, different clutch frequency, different running period and temperature rise variation, friction factor variation, electromagnetic attraction, clutch bearings, the actual applying working condition of analog electrical magnet clutch has limited developing of automobile industry speed truly.
So far, life-span, method for testing performance and test unit thereof to the compressor of air conditioner electromagnetic clutch carries out simulation loading and dynamic torque test thereof yet there are no relevant report.
Summary of the invention
For overcoming the weak point of manual test compressor of air conditioner electromagnetic clutch moment of torsion, the invention provides automatic test method of a kind of automobile air conditioner compressor electromagnetic clutch dynamic torque and device, this automatic test method and device can be simulated the actual applying working condition of air-conditioning electromagnetic clutch truly, test its dynamic parameter under rotating speed spectrum, torque load spectrum and change the rule rate, observe and study its dynamic process in detail, provide scientific basis for estimating its performance, life-span and reliability.
In order to realize the foregoing invention purpose, the present invention has adopted following technical scheme:
The automatic test method of described automobile air conditioner compressor electromagnetic clutch dynamic torque: this automatic test method is installed in the electromagnetic clutch assembly cantilever end of main shaft in the bearing assembly, the other end of main shaft connects as electrical loading apparatus with the load electric eddy current dynamometer by torque rotary speed sensor, main shaft is applied retarding torque, and variable-frequency motor connects by belt with the electromagnetic clutch assembly and applies active torque, with this simulated automotive compressor of air conditioner operating mode; The torque rotary speed sensor design and installation detects torque and rotating speed in the automatic test equipment between bearing assembly and load electric eddy current dynamometer; For avoiding on the sensor elastic shaft, producing moment of flexure, guarantee measuring accuracy, adopt flexible coupling to connect, and the right alignment between bearing assembly, torque rotary speed sensor, the load electric eddy current dynamometer three is controlled in the 0.02mm; Automatically the control of the electrical system of test method is controlled voltage signal to frequency converter by the computing machine output speed, and frequency converter drives the variable-frequency motor running, and variable-frequency motor is by the rotation of belt drives electromagnetic clutch, and when clutch solenoid cut off the power supply, belt pulley dallied; When clutch solenoid was switched on, electromagnetic force made the adhesive of spring friction plate assembly, drive the rotation of main shaft and torque rotary speed sensor and electric eddy current dynamometer, and the disengaging of electromagnetic clutch/adhesive action was controlled by computing machine output I/O command signal equally; Computing machine is according to the tach signal value of torque rotary speed sensor feedback, come the rotating speed of closed-loop control variable-frequency motor speed governing to required test, also the closed-loop control electric eddy current dynamometer is exported the test torsion load that needs, the variable-frequency motor revolution electric current value that same collection electromagnetic clutch temperature inside sensor values in real time and frequency converter feed back.
Described automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment, this automatic test equipment mainly is made up of bearing assembly, torque rotary speed sensor, electric eddy current dynamometer and electric control system, wherein the electromagnetic clutch design and installation is at the left end of bearing assembly, form a cantilever design, the belt pulley that is driven electromagnetic clutch by variable-frequency motor makes its rotation; The right-hand member of bearing assembly connects torque rotary speed sensor, electric eddy current dynamometer respectively by shaft coupling, and torque rotary speed sensor and electric eddy current dynamometer all are placed on separately the base, guarantee that its right alignment is consistent with the bearing assembly main shaft.
Described automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment, go to upper and lower the upper shell of semicircle shape and lower house in its bearing assembly by Bolt Connection and be fixed on the worktable, in the left and right hole of housing, be provided with left lining and right lining, with main shaft wherein by two cover block bearings; At right-hand member, right inner end cap is by being bolted on the right lining, the inner ring of bearing by the right side nut by thread connection at main shaft and regulate its degree of tightness, the outer ring of bearing is fixed by right outer end cap, right outer end cap is by being bolted on the right lining, and the right-hand member of main shaft connects half a coupler; At left end, left side inner end cap is by being bolted on the left lining, the inner ring of bearing is pressed closer by the left side nut by thread connection at main shaft and regulate its degree of tightness by cover in the transition again, the outer ring of bearing is pressed closer by compression spring and afterburning ring again and is fixed by left outer end cap, right outer end cap is by being bolted on the left lining, simultaneously on the outer face of left lining, spacer shell is arranged by bolt, by bolt bolster is arranged on the spacer shell, dispose the axial location ring on the bolster respectively, circumferential register pin and be used for temperature sensor mounted mounting hole, the axial location ring is fixed on the front end of bolster by left-hand threaded nut; Also be connected with the extension bar axle in main shaft left end internal thread hole, extension bar axle and bolster leave the gap, so that the extension bar axle can together rotate with main shaft.
Described vehicle compressor air-conditioning electromagnetic clutch dynamic torque automatic test equipment, its electric control system comprise main shaft frequency conversion speed-adjusting system control, the control of main shaft torque loading system, clutch on-off action and frequency control, this wherein:
1) main shaft frequency conversion speed-adjusting system: frequency conversion speed-adjusting system is made up of VFD055A43A intelligent type frequency-conversion device and a YVF5.5KW variable-frequency motor, by the transmission of one-level V-belt, variable-frequency motor is linked to each other with the electromagnetic clutch belt pulley; Because it is 7500r/min that main shaft requires rotating speed, exceed the variable-frequency motor maximum amount and decide tachometer value, so the design ratio of gear is 1: 1.5,, thereby drive the clutch pulley rotation with the realization speedup; Computing machine sends the control voltage signal, sends into the intelligent type frequency-conversion device and carries out stepless speed regulation, and torque rotary speed sensor feeds back to computing machine with the speed of mainshaft that measures and surveys supervisory system, carries out forming closed loop control mode after PID regulates;
2) main shaft torque loading system: the torque loading system adopts electric eddy current dynamometer electromagnetism load mode, after the control signal that computing machine is given enters the Dynamometer Control device, electric eddy current dynamometer can be followed the size of current of Dynamometer Control driver output automatically, the torsion load that change produces main shaft loads for the test electromagnetic clutch; Computing machine comes the test torsion load that the closed-loop control electric eddy current dynamometer is exported to be needed according to the dtc signal value from the torque rotary speed sensor feedback;
3) clutch on-off action and frequency control: clutch control system is made up of the solenoid of direct supply, dc solid-state relay and electromagnetic clutch, by computing machine by the test requirement of the clutch time interval, send corresponding I/O command signal, control the electromagnetic clutch adhesive and separate.
Owing to adopted technical scheme as mentioned above, the present invention has following superiority:
1) this test method adopts the cantilever end that underproof compressor of air conditioner electromagnetic clutch is placed bearing assembly, and this structure support form simulation is strong, is convenient to do various performance tests and the detection of some special parameters, as surveying inner ring temperature etc.
2) this test method and device succeed in developing a difficult problem that has solved this type of design experiment examination of automobile, make the design, material, processing technology, technical feature etc. of automobile product be updated and improve.
3) for guaranteeing the fine transmission of moment of torsion under the fair speed, block bearing is selected angular contact ball bearing for use.
4) with electric eddy current dynamometer rotary main shaft is applied torque load, come simulated automotive compressor of air conditioner operating mode, it is little to have a volume, and do not have and impact, noiseless, pollution-free, advantage such as reaction velocity is fast.
5) adopt this test method and device, its measuring accuracy height, dynamic response are fast, and the stable industrial control computer of do as one likes energy is implemented to survey, supervisory system, improve automatic measurement and controlling level in the electromagnetic clutch dynamic torque process of the test, thereby realized the closed-loop control of load, rotating speed.
Description of drawings
Fig. 1 electromagnetic clutch components apart state sketch;
Fig. 2 electromagnetic clutch assembly attracting state sketch;
Fig. 3 apparatus structure synoptic diagram of the present invention;
Fig. 4 bearing assembly of the present invention and electromagnetic clutch component installation structure synoptic diagram;
The electric control system sketch of Fig. 5 device of the present invention;
Geometrical clamp location synoptic diagram during the static survey of Fig. 6 electromagnetic clutch moment of torsion.
Among the above-mentioned figure: the 1-electromagnetic clutch; 1.1-spring friction plate assembly; 1.2-belt; 1.3-belt pulley; 1.4-solenoid; The 2-bearing assembly; 2.1-key; 2.2-nut; 2.3-stop washer; 2.4-adjusting play packing ring; 2.5-left-hand threaded nut; 2.6-extension bar axle; 2.7-bolster; 2.8-axial location ring; 2.9-circumferential register pin; 2.10-left side nut; 2.11-left outer end cap; 2.12-interior cover; 2.13-afterburning ring; 2.14-compression spring; 2.15-spacer shell; 2.16-left lining; 2.17-left inner end cap; 2.18-lower house; 2.19-worktable; 2.20-upper shell; 2.21-right lining; 2.22-right inner end cap; 2.23-block bearing; 2.24-right outer end cap; 2.25-main shaft; 2.26-right side nut; 2.27-half a coupler; The 3-torque rotary speed sensor; The 4-electric eddy current dynamometer; The 5-geometrical clamp.
Embodiment
Shown in Fig. 3,4: automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment of the present invention, its automatic test equipment mainly is made up of bearing assembly (2), torque rotary speed sensor (3), electric eddy current dynamometer (4) and electric control system, wherein electromagnetic clutch (1) design and installation is at the left end of bearing assembly (2), form a cantilever design, the belt pulley that is driven electromagnetic clutch (1) by variable-frequency motor makes its rotation; The right-hand member of bearing assembly (2) connects torque rotary speed sensor (3), electric eddy current dynamometer (4) respectively by shaft coupling, torque rotary speed sensor (3) and electric eddy current dynamometer (4) all are placed on separately the base, guarantee that its right alignment is consistent with bearing assembly (2) main shaft.The upper shell (2.20) that wherein goes to upper and lower semicircle shape in the bearing assembly and lower house (2.18) are by Bolt Connection and be fixed on the worktable (2.19), in the left and right hole of housing, be provided with left lining (2.16) and right lining (2.21), with main shaft (2.25) wherein by two cover block bearings (2.23); At right-hand member, right inner end cap (2.22) is by being bolted on the right lining (2.21), the inner ring of bearing (2.23) by right side nut (2.26) by thread connection at main shaft (2.25) and regulate its degree of tightness, the outer ring of bearing (2.23) is fixing by right outer end cap (2.24), right outer end cap (2.24) is by being bolted on the right lining (2.21), and the right-hand member of main shaft (2.25) connects half a coupler (2.27); At left end, left side inner end cap (2.17) is by being bolted on the left lining (2.16), the inner ring of bearing (2.23) is pressed closer by left side nut (2.10) by thread connection at main shaft (2.25) and regulate its degree of tightness by cover (2.12) in the transition again, the outer ring of bearing (2.23) presses closer fixing by left outer end cap (2.11) by compression spring (2.14) and afterburning ring (2.13) again, right outer end cap (2.24) is by being bolted on the left lining (2.16), simultaneously on the outer face of left lining (2.16), spacer shell (2.15) is arranged by bolt, spacer shell (2.15) is gone up has bolster (2.7) by bolt, dispose axial location ring (2.8) on the bolster (2.7) respectively, circumferential register pin (2.9) and be used for temperature sensor mounted mounting hole, axial location ring (2.8) is fixed on the front end of bolster (2.7) by left-hand threaded nut (2.5); Also be connected with extension bar axle (2.6) in main shaft (2.25) left end internal thread hole, extension bar axle (2.6) leaves the gap with bolster (2.7), so that extension bar axle (2.6) can together rotate with main shaft (2.25).
During test, earlier extension bar axle (2.6) is installed in the main shaft (2.25), then spacer shell (2.15) is fixed together with screw and left lining (2.16), bolster (2.7) is fixed together with screw and spacer shell (2.15), again solenoid (1.4) after being assembled into, axial location ring (2.8) is packed on the bolster (2.7), note this moment circumferential register pin (2.9) is packed in the pilot hole of solenoid (1.4) side, belt pulley (1.3) is installed then to bolster (2.7), fixing with left-hand threaded nut (2.5).Adjusting play packing ring (2.4) is packed on the extension bar axle (2.6), check that the gap should be 0.5mm. if improperly need to adjust and change the thickness of its adjusting play packing ring (2.4) to requiring gap width.Afterwards, add stop washer (2.3) and fix, belt (1.2) is installed to belt pulley (1.3) with nut (2.2).When solenoid (1.4) was charged, spring friction plate assembly (1.1) drove extension bar axle (2.6) with Pulley shaft bearing assembly (1.3) adhesive by key (2.1) and drives main shaft (2.25) running; Belt pulley (1.3) idle running when electromagnetic coil assembly (1.4) dead electricity, main shaft (2.25) does not turn round.After tested electromagnetic clutch installed, and with nylon rope with each shaft coupling connect good after, can call through test device general supply.
As shown in Figure 5: vehicle compressor air-conditioning electromagnetic clutch dynamic torque automatic test equipment of the present invention, its electric control system comprise main shaft frequency conversion speed-adjusting system control, the control of main shaft torque loading system, clutch on-off action and frequency control, this wherein:
1) main shaft frequency conversion speed-adjusting system: frequency conversion speed-adjusting system is made up of VFD055A43A intelligent type frequency-conversion device and a YVF5.5KW variable-frequency motor, by the transmission of one-level V-belt, variable-frequency motor is linked to each other with the electromagnetic clutch belt pulley; Because it is 7500r/min that main shaft requires rotating speed, exceed the variable-frequency motor maximum amount and decide tachometer value, so the design ratio of gear is 1: 1.5,, thereby drive the clutch pulley rotation with the realization speedup; Computing machine sends the control voltage signal, sends into the intelligent type frequency-conversion device and carries out stepless speed regulation, and torque rotary speed sensor feeds back to computing machine with the speed of mainshaft that measures and surveys supervisory system, carries out forming closed loop control mode after PID regulates;
2) main shaft torque loading system: the torque loading system adopts electric eddy current dynamometer electromagnetism load mode, after the control signal that computing machine is given enters the Dynamometer Control device, electric eddy current dynamometer can be followed the size of current of Dynamometer Control driver output automatically, the torsion load that change produces main shaft loads for the test electromagnetic clutch; Computing machine comes the test torsion load that the closed-loop control electric eddy current dynamometer is exported to be needed according to the dtc signal value from the torque rotary speed sensor feedback;
3) clutch on-off action and frequency control: clutch control system is made up of the solenoid of direct supply, dc solid-state relay and electromagnetic clutch, by computing machine by the test requirement of the clutch time interval, send corresponding I/O command signal, control the electromagnetic clutch adhesive and separate.
The electric control system control method is as follows:
At first computing machine is exported switching value I/O signal, the control solenoid is charged, clutch coupling is an attracting state, clutch pulley and main shaft become one → follow computing machine output speed control voltage signal to frequency converter, frequency converter drives the variable-frequency motor running, the belt pulley of variable-frequency motor drives the rotation of electromagnetic clutch belt pulley by belt, and belt pulley drives main shaft and torque rotary speed sensor and electric eddy current dynamometer rotation.Computing machine is according to the tach signal value from the torque rotary speed sensor feedback, come the control of conversion electric machine speed regulation to the rotating speed of required test → then computing machine output Loading Control voltage signal is given the electric eddy current dynamometer driver with closed-loop fashion, and according to dtc signal value from the torque rotary speed sensor feedback, control the computing machine of the torsion load that electric eddy current dynamometer applies out required test → under above-mentioned rotating speed, loaded-up condition by the clutch frequency setting value requirement of electromagnetic clutch with closed-loop fashion, the outage of control solenoid/charged makes the disengaging/adhesive of clutch coupling.Have only electromagnetic clutch belt pulley fast idle when electromagnetic clutch is thrown off, main shaft remains static.And the rotating speed that is main shaft when electromagnetic clutch adhesive its load electric eddy current dynamometer rotating shaft of moment will produce from zero to suddenling change with the band idling speed of belt pulley synchronous high-speed running, its main shaft torque and variable-frequency motor electric current moment are increased greatly, moment later electromagnetic clutch promptly be tending towards the carrying of normal value band and change.So dynamically long-time test examination by designing requirement; if electromagnetic clutch inner ring temperature detection value is too high in test examination process, the main shaft torque is excessive, the variable-frequency motor electric current is excessive; can judge that clutch coupling principal and subordinate Moving plate is that faults such as sliding friction, load be overweight appear in electromagnetic clutch belt pulley and electromagnetic spring clutch friction plate inter-module, the test unit shutdown of will reporting to the police automatically.
As shown in Figure 6, the peak torque when measuring electromagnetic clutch static state as if need, on device of the present invention, can take following mode:
The nylon rope at torque speed sensor and main shaft shaft coupling place is taken off → belt is shed → to belt pulley put another big specification belt → geometrical clamp (5) dress thereon → allow solenoid charged → clutch coupling adhesive → carry out the static torque measurement with the digital display spanner.
Claims (4)
1, the automatic test method of a kind of automobile air conditioner compressor electromagnetic clutch dynamic torque, it is characterized in that: this automatic test method is installed in the electromagnetic clutch assembly cantilever end of main shaft in the bearing assembly, the other end of main shaft connects as electrical loading apparatus with the load electric eddy current dynamometer by torque rotary speed sensor, main shaft is applied retarding torque, and variable-frequency motor connects by belt with the electromagnetic clutch assembly and applies active torque, with this simulated automotive compressor of air conditioner operating mode; The torque rotary speed sensor design and installation detects torque and rotating speed in the automatic test equipment between bearing assembly and load electric eddy current dynamometer; For avoiding on the sensor elastic shaft, producing moment of flexure, guarantee measuring accuracy, adopt flexible coupling to connect, and the right alignment between bearing assembly, torque rotary speed sensor, the load electric eddy current dynamometer three is controlled in the 0.02mm; Automatically the control of the electrical system of test method is controlled voltage signal to frequency converter by the computing machine output speed, and frequency converter drives the variable-frequency motor running, and variable-frequency motor is by the rotation of belt drives electromagnetic clutch, and when clutch solenoid cut off the power supply, belt pulley dallied; When clutch solenoid was switched on, electromagnetic force made the adhesive of spring friction plate assembly, drive the rotation of main shaft and torque rotary speed sensor and electric eddy current dynamometer, and the disengaging of electromagnetic clutch/adhesive action was controlled by computing machine output I/O command signal equally; Computing machine is according to the tach signal value of torque rotary speed sensor feedback, come the rotating speed of closed-loop control variable-frequency motor speed governing to required test, also the closed-loop control electric eddy current dynamometer is exported the test torsion load that needs, the variable-frequency motor revolution electric current value that same collection electromagnetic clutch temperature inside sensor values in real time and frequency converter feed back.
2, a kind of automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment, it is characterized in that: this automatic test equipment mainly is made up of bearing assembly (2), torque rotary speed sensor (3), electric eddy current dynamometer (4) and electric control system, wherein electromagnetic clutch (1) design and installation is at the left end of bearing assembly (2), form a cantilever design, the belt pulley that is driven electromagnetic clutch (1) by variable-frequency motor makes its rotation; The right-hand member of bearing assembly (2) connects torque rotary speed sensor (3), electric eddy current dynamometer (4) respectively by shaft coupling, torque rotary speed sensor (3) and electric eddy current dynamometer (4) all are placed on separately the base, guarantee that its right alignment is consistent with bearing assembly (2) main shaft.
3, automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment as claimed in claim 2, it is characterized in that: the upper shell (2.20) that goes to upper and lower semicircle shape in the bearing assembly and lower house (2.18) are by Bolt Connection and be fixed on the worktable (2.19), in the left and right hole of housing, be provided with left lining (2.16) and right lining (2.21), with main shaft (2.25) wherein by two cover block bearings (2.23); At right-hand member, right inner end cap (2.22) is by being bolted on the right lining (2.21), the inner ring of bearing (2.23) by right side nut (2.26) by thread connection at main shaft (2.25) and regulate its degree of tightness, the outer ring of bearing (2.23) is fixing by right outer end cap (2.24), right outer end cap (2.24) is by being bolted on the right lining (2.21), and the right-hand member of main shaft (2.25) connects half a coupler (2.27); At left end, left side inner end cap (2.17) is by being bolted on the left lining (2.16), the inner ring of bearing (2.23) is pressed closer by left side nut (2.10) by thread connection at main shaft (2.25) and regulate its degree of tightness by cover (2.12) in the transition again, the outer ring of bearing (2.23) presses closer fixing by left outer end cap (2.11) by compression spring (2.14) and afterburning ring (2.13) again, right outer end cap (2.24) is by being bolted on the left lining (2.16), simultaneously on the outer face of left lining (2.16), spacer shell (2.15) is arranged by bolt, spacer shell (2.15) is gone up has bolster (2.7) by bolt, dispose axial location ring (2.8) on the bolster (2.7) respectively, circumferential register pin (2.9) and be used for temperature sensor mounted mounting hole, axial location ring (2.8) is fixed on the front end of bolster (2.7) by left-hand threaded nut (2.5); Also be connected with extension bar axle (2.6) in main shaft (2.25) left end internal thread hole, extension bar axle (2.6) leaves the gap with bolster (2.7), so that extension bar axle (2.6) can together rotate with main shaft (2.25).
4, automobile air conditioner compressor electromagnetic clutch dynamic torque automatic test equipment as claimed in claim 2, it is characterized in that: this electric control system comprises main shaft frequency conversion speed-adjusting system control, the control of main shaft torque loading system, clutch on-off action and frequency control, this wherein:
1) main shaft frequency conversion speed-adjusting system: frequency conversion speed-adjusting system is made up of VFD055A43A intelligent type frequency-conversion device and a YVF5.5KW variable-frequency motor, by the transmission of one-level V-belt, variable-frequency motor is linked to each other with the electromagnetic clutch belt pulley; Because it is 7500r/min that main shaft requires rotating speed, exceed the variable-frequency motor maximum amount and decide tachometer value, so the design ratio of gear is 1: 1.5,, thereby drive the clutch pulley rotation with the realization speedup; Computing machine sends the control voltage signal, sends into the intelligent type frequency-conversion device and carries out stepless speed regulation, and torque rotary speed sensor feeds back to computing machine with the speed of mainshaft that measures and surveys supervisory system, carries out forming closed loop control mode after PID regulates;
2) main shaft torque loading system: the torque loading system adopts electric eddy current dynamometer electromagnetism load mode, after the control signal that computing machine is given enters the Dynamometer Control device, electric eddy current dynamometer can be followed the size of current of Dynamometer Control driver output automatically, the torsion load that change produces main shaft loads for the test electromagnetic clutch; Computing machine comes the test torsion load that the closed-loop control electric eddy current dynamometer is exported to be needed according to the dtc signal value from the torque rotary speed sensor feedback;
3) clutch on-off action and frequency control: clutch control system is made up of the solenoid of direct supply, dc solid-state relay and electromagnetic clutch, by computing machine by the test requirement of the clutch time interval, send corresponding I/O command signal, control the electromagnetic clutch adhesive and separate.
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| CNB2007100543883A CN100573072C (en) | 2007-05-11 | 2007-05-11 | Automatic test method of automobile air conditioner compressor electromagnetic clutch dynamic torque and device |
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| CNB2007100543883A CN100573072C (en) | 2007-05-11 | 2007-05-11 | Automatic test method of automobile air conditioner compressor electromagnetic clutch dynamic torque and device |
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| CN100573072C CN100573072C (en) | 2009-12-23 |
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