CN110988775B - Anti-reverse power transmission calibration device for electric dynamometer - Google Patents
Anti-reverse power transmission calibration device for electric dynamometer Download PDFInfo
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- CN110988775B CN110988775B CN201911362365.8A CN201911362365A CN110988775B CN 110988775 B CN110988775 B CN 110988775B CN 201911362365 A CN201911362365 A CN 201911362365A CN 110988775 B CN110988775 B CN 110988775B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
- G01L25/006—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring work or mechanical power or mechanical efficiency
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Abstract
The invention belongs to the technical field of electronic engineering, and relates to an anti-reverse power transmission calibration device for an electric dynamometer. Through setting up resistance assembly, control module gathers output current through the mutual inductance module of electric current in advance, gather the produced electric current size of dynamometer machine through the current control module that goes backward simultaneously, control module carries out the loading with resistance assembly's resistance strip combination, resistance assembly is totally with the produced unnecessary electric energy consumption of electric power dynamometer machine, avoids electric energy acting will the feedback public electric wire netting, guarantees the security effect of public electric wire netting power supply, fully ensures public electric wire netting's accurate operation.
Description
Technical Field
The invention belongs to the technical field of electric power engineering, and particularly relates to an anti-reverse power transmission calibration device of an electric dynamometer.
Background
The generator needs to test various performance parameters of the motor before the product leaves the factory, the working done by the rotation of the rotor is not utilized to a certain extent when the motor is tested, therefore, an electric dynamometer is needed to be used for converting the working done by the motor when the motor is tested into electric energy to do work, the dynamometer is also called a dynamometer and is mainly used for testing the power of the engine and also can be used as loading equipment of a gear box, a speed reducer and a gear box, the device is used for testing the transmission power of the device and mainly comprises a hydraulic dynamometer, an eddy current dynamometer and an electric dynamometer, wherein the electric dynamometer utilizes a motor to measure the torque output by various power mechanical shafts, and incorporate rotational speeds to determine power, since the power machine being measured may have different rotational speeds, therefore, the motor used as the electric dynamometer needs to be a motor capable of smoothly regulating speed, and the existing dynamometer and calibration device have the following defects in the use process:
however, even if the dynamometer is adopted to reduce the waste of electric energy for doing work in the final effect, if the electric energy which is reversely sent to the public power grid by the electric dynamometer does work more than the electric energy consumed by the motor, the electric energy is sent back to the public power grid, which not only brings greater security threat to the power supply of the public power grid, but also interferes the accurate operation of the public power grid, for a test bed of an electric dynamometer, static calibration of torque needs to be carried out on a rotor of the dynamometer, the existing calibration device generally adopts the lever principle of a balance, however, the lever of the balance is easy to bend in the long-term use process, so that the precision of the lever keeping balance under the lever principle is gradually reduced, when the resistance value of the existing resistance component needs to be adjusted, generally, a sliding rheostat with a complex structure is needed, the complex rheostat is troublesome to disassemble when maintenance is needed, and the rheostat with a simple structure is not beneficial to efficient automatic resistance value adjustment.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an anti-reverse power transmission calibration device for an electric dynamometer.
The technical scheme adopted by the invention for solving the technical problems is as follows: an anti-reverse power transmission calibration device of an electric dynamometer comprises a first power distribution cabinet, a second power distribution cabinet, a third power distribution cabinet, a fourth power distribution cabinet and a base, wherein a wire inlet unit, a feeder unit, a test wire outlet unit and a load unit are respectively arranged in the first power distribution cabinet, the second power distribution cabinet, the third power distribution cabinet and the fourth power distribution cabinet;
the dynamometer comprises a dynamometer body, an inlet wire unit, a load unit, a test wire outlet unit, a feeder line unit and a load unit, wherein the inlet wire unit is connected with a public power grid;
the load unit comprises a leading current mutual inductance module, a control module, an indication module, an electromechanical module, a resistance assembly and a trailing current mutual inductance module, the control module is in bidirectional electric connection with the leading current mutual inductance module and the trailing current mutual inductance module, the input end of the indication module and the input end of the relay module are in electric connection with the output end of the control module, the input end of the resistance assembly is in electric connection with the output end of the relay module, the test wire outlet unit and the feeder unit are respectively in bidirectional electric connection with the leading current mutual inductance module and the trailing current mutual inductance module, and the output end of the resistance assembly is in electric connection with the input end of the test wire outlet unit;
the calibration assembly comprises a cross, a square groove plate is fixedly connected to the center of the cross, a rotor connecting block fixedly connected to a rotor of the dynamometer body is inserted into the square groove plate, a main ring is fixedly connected to the outer ring of the cross, fan-shaped plates are fixedly connected between the top end and one end of the cross and between the bottom and the other end of the cross, a through shaft is fixedly connected to the center line of the long shaft of each fan-shaped plate, hanging chains located at the front and the rear of the cross are movably connected to each through shaft through a bearing, and a balancing weight is fixedly connected to the bottom of each hanging chain;
the resistance assembly comprises two insulating rings, inner rings of the two insulating rings are provided with inner rotary rings, resistance strips of annular arrays are fixedly connected between the two insulating rings, and outer rings of the inner rotary rings are fixedly connected with contact blocks.
Specifically, wires are arranged at the top and the bottom of the resistor strips on two sides of the upper half vertical part of the gap between the insulating double-ring bodies respectively, and the wires of the inner rings of the resistor strips penetrate through the surfaces of the inner rings of the insulating double-ring inner rings and are in lap joint with the contact blocks.
Specifically, the pivot of the motor that awaits measuring and the pivot of dynamometer body are located same straight line and through coupling subassembly fastening connection, the coupling subassembly includes a shaft coupling section of thick bamboo, the equal fixedly connected with in shaft coupling bottom and top keeps off the ring, a shaft coupling section of thick bamboo divide into and is located the motor end section of thick bamboo of the motor output shaft that awaits measuring and is located the dynamometer body rotor end respectively and measure dynamometer end section of thick bamboo, the end branch in opposite directions of motor and dynamometer body pivot of awaiting measuring is by fixedly connected with male plug and female plug, male plug and female plug are the two fixed connection of participating in of carousel non-rotation axle fixed connection.
Specifically, the inner ring joint of the coupling cylinder is fixedly connected with and lapped with a fixed semi-ring and a movable semi-ring respectively, the groove side of the fixed semi-ring is movably connected with a threaded shaft through a bearing, and the threaded shaft and the movable semi-ring are in threaded connection and penetrate through the side part of the coupling cylinder.
Specifically, the double pins are inserted between the movable semi-ring and the fixed semi-ring, the bottoms of the turntables of the male plug and the female plug are in lap joint with the top of the threaded shaft, a combined plug is arranged between the motor end cylinder and the dynamometer end cylinder, and the combined plug is formed by fixedly connecting one sides of the male plug and the female plug, which are far away from the double pins.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention relates to an anti-reverse power transmission calibration device for an electric dynamometer, which comprises a resistance component, an inlet wire unit takes power from a public power grid and transmits the power to a test outlet wire unit, the test outlet wire unit supplies power to a motor to be tested to drive a motor rotating shaft to rotate, a rotor of an electric dynamometer body is connected with an output shaft of the motor to be tested through a coupler, kinetic energy generated by the rotation of the motor is converted into electric energy, the electric energy is fed back to the inlet wire unit through a feeder unit, a control module collects output current through a leading current mutual inductance module, the generated current of dynamometer machine size is gathered through the backward current control module simultaneously, and control module carries out the loading with resistance strip combination of resistance assembly, and resistance assembly consumes the produced unnecessary electric energy of electric dynamometer machine totally, avoids the electric energy to do work and will send back public electric wire netting, guarantees the safe effect of public electric wire netting power supply, fully ensures public electric wire netting's accurate operation.
(2) According to the calibration device for preventing reverse power transmission of the electric dynamometer, disclosed by the invention, the balancing weight is combined with the main ring when the static calibration of the torque of the rotor of the dynamometer is required, so that the lever structure of the cross is conveniently protected by using the ring-shaped main ring protection structure, meanwhile, the balancing weight can accurately calibrate and calibrate the rotor connecting block, the inner rotating ring is connected with the servo motor by arranging the inner rotating ring, the inner rotating ring is accurately rotated, so that a plurality of resistance strips are connected in series in different quantities, and the resistance value can be automatically adjusted by using the resistance component with a simple structure.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic structural diagram of an anti-reverse power transmission calibration device for an electric dynamometer provided by the present invention;
FIG. 2 is a schematic diagram of a load unit system of an anti-reverse power transmission calibration apparatus for an electric dynamometer provided by the present invention;
FIG. 3 is a diagram of an anti-reverse power transmission calibration device for an electric dynamometer provided by the present invention;
FIG. 4 is a schematic structural diagram of a calibration assembly of the anti-reverse power transmission calibration apparatus for the electric dynamometer provided by the present invention;
FIG. 5 is a schematic diagram of a balance state of a calibration component of an anti-reverse power transmission calibration apparatus for an electric dynamometer provided by the present invention;
FIG. 6 is a schematic structural diagram of a coupling assembly of an anti-reverse power transmission calibration apparatus for an electric dynamometer provided by the present invention;
FIG. 7 is a schematic diagram of a resistor assembly structure of an anti-reverse power transmission calibration apparatus for an electric dynamometer provided by the present invention;
fig. 8 is a schematic diagram of an electrical connection portion of a resistor assembly of the anti-reverse power transmission calibration apparatus for an electric dynamometer provided by the present invention.
In the figure: 1. a first power distribution cabinet; 11. a wire inlet unit; 2. a second power distribution cabinet; 21. a feeder unit; 3. a third power distribution cabinet; 31. a test outlet unit; 4. a fourth power distribution cabinet; 41. a load unit; 5. a base; 51. a slide plate; 6. a dynamometer body; 7. a motor to be tested; 8. a coupling assembly; 81. a coupling cylinder; 811. a baffle ring; 812. a motor end cylinder; 813. a dynamometer end cylinder; 814. a stationary half ring; 815. a movable half ring; 816. a threaded shaft; 82. a male plug; 83. a female plug; 831. double pins; 84. a combined plug; 9. calibrating the component; 91. a main ring; 92. a cross; 93. a square groove plate; 94. a sector plate; 95. penetrating the shaft; 96. a counterweight block; 97. a rotor connecting block; 10. a resistance component; 101. insulating double circles; 102. a resistor strip; 103. an inner swivel; 1031. and a contact block.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1-8, the anti-reverse power transmission calibration device for the electric dynamometer comprises a first power distribution cabinet 1, a second power distribution cabinet 2, a third power distribution cabinet 3, a fourth power distribution cabinet 4 and a base 5, wherein a wire inlet unit 11, a feeder unit 21, a test wire outlet unit 31 and a load unit 41 are respectively arranged in the first power distribution cabinet 1, the second power distribution cabinet 2, the third power distribution cabinet 3 and the fourth power distribution cabinet 4, the top of the base 5 is movably connected with a sliding plate 51 through a sliding rail, the top of the sliding plate 51 is fixedly connected with a dynamometer body 6, the top of the base 5 is fixedly connected with a motor 7 to be tested, and one end of a rotor of the dynamometer body 6 is fixedly connected with a calibration assembly 9;
the inlet wire unit 11 is connected with a public power grid, the output end of the inlet wire unit 11 is electrically connected with the test outlet wire unit 31, the output end of the test outlet wire unit 31 is electrically connected with the input end of the motor 7 to be tested, the output end of the dynamometer body 6 is electrically connected with the input end of the feeder wire unit 21, and the feeder wire unit 21 is electrically connected with the load unit 41 and the input end of the inlet wire unit 11;
the load unit 41 comprises a leading current mutual inductance module, a control module, an indication module, an electromechanical module, a resistance assembly 10 and a trailing current mutual inductance module, the control module is in bidirectional electric connection with the leading current mutual inductance module and the trailing current mutual inductance module, the indication module is in electric connection with the input end of a relay module and the output end of the control module, the input end of the resistance assembly 10 is in electric connection with the output end of the relay module, the test outlet unit 31 and the feeder unit 21 are respectively in bidirectional electric connection with the leading current mutual inductance module and the trailing current mutual inductance module, the output end of the resistance assembly 10 is in electric connection with the input end of the test outlet unit 31, the inlet unit 11 takes electricity from a public power grid and transmits the electricity to the test outlet unit 31, the test outlet unit 31 supplies power to the motor 7 to be tested to drive a motor rotating shaft to rotate, and the rotor of the electric dynamometer body 6 is connected with the output shaft of the motor 7 to be tested through a coupler, the kinetic energy generated by the rotation of the motor is converted into electric energy, the electric energy is reversely fed back to the wire inlet unit 11 through the feeder line unit 21, the control module collects output current through the antecedent current mutual inductance module, meanwhile, the current generated by the dynamometer is collected through the backward current control module, the control module carries out load reduction on the resistor strip 102 combination of the resistor assembly 10, the resistor assembly 10 consumes redundant electric energy generated by the electric dynamometer, the electric energy is prevented from being reversely fed back to the public power grid when acting, the safety effect of power supply of the public power grid is guaranteed, and the accurate operation of the public power grid is fully guaranteed;
the calibration component 9 comprises a cross 92, a square groove plate is fixedly connected to the center of the cross 92, a rotor connecting block 97 fixedly connected to a rotor of the dynamometer body 6 is inserted into the square groove plate, a main ring 91 is fixedly connected to an outer ring of the cross 92, sector plates 94 are fixedly connected between the top end and one end of the cross 92 and between the bottom and the other end of the cross 92, a through shaft 95 is fixedly connected to a center line of a long shaft of the sector plates 94, hanging chains located at the front and rear parts of the cross 92 are movably connected to the through shaft 95 through bearings, a balancing weight 96 is fixedly connected to the bottom of each hanging chain, the balancing weight 96 is combined with the main ring 91 when static calibration of torque is required to be performed on the rotor of the dynamometer through the calibration component 9, the lever structure of the cross 92 is conveniently protected by using a ring-shaped main ring 91 protection structure, and the rotor connecting block 97 can be precisely calibrated by the balancing weight 96, by arranging the inner rotary ring 103, the inner rotary ring 103 is connected with the servo motor, and the inner rotary ring 103 is precisely rotated, so that the plurality of resistor strips 102 are connected in series in different quantities, and the resistor component 10 with a simple structure is convenient to automatically adjust the resistance value;
the resistor component 10 comprises an insulating double ring 101, an inner rotating ring 103 is arranged on the inner ring of the insulating double ring 101, resistor strips 102 in an annular array are fixedly connected between the insulating double ring 101, and a contact block 1031 is fixedly connected to the outer ring of the inner rotating ring 103.
Specifically, conducting wires are arranged at the top and the bottom of the resistor strips 102 on two sides of the upper half vertical part of the gap between the ring bodies of the insulating double-ring 101, and the conducting wires of the inner rings of the resistor strips 102 penetrate through the surfaces of the inner rings of the insulating double-ring inner ring and are lapped with the contact blocks 1031.
Specifically, the pivot of the motor 7 that awaits measuring and the pivot of dynamometer body 6 are located same straight line and through 8 fastening connections of shaft coupling subassembly, shaft coupling subassembly 8 includes a shaft coupling section of thick bamboo 81, the equal fixedly connected with in shaft coupling section of thick bamboo 81 bottom and top keeps off ring 811, a shaft coupling section of thick bamboo 81 divide into and is located the motor end section of thick bamboo 812 of the motor 7 output shaft that awaits measuring and is located the dynamometer end section of thick bamboo 813 of dynamometer body 6 rotor end respectively, the end branch in opposite directions of the motor 7 that awaits measuring and dynamometer body 6 pivot is by fixedly connected with male plug 82 and female plug 83, male plug 82 and female plug 83 are the two base pin 831 fixed connection of carousel non-rotation axle fixed connection.
Specifically, a fixed half ring 814 and a movable half ring 815 are fixedly connected and lapped on the inner ring joint side of the coupling cylinder 81 respectively, a threaded shaft 816 is movably connected to the groove side of the fixed half ring 814 through a bearing, and the threaded shaft 816 and the movable half ring 815 are in threaded connection and penetrate through the side portion of the coupling cylinder 81.
Specifically, the double-pin 831 is inserted between the movable half-ring 815 and the fixed half-ring 814, the bottoms of the rotating discs of the male plug 82 and the female plug 83 are overlapped with the top of the threaded shaft 816, the combined plug 84 is arranged between the motor end cylinder 812 and the dynamometer end cylinder 813, the combined plug 84 is formed by fixedly connecting one side of the male plug 82 and one side of the female plug 83, which are far away from the double-pin 831, and the threaded shaft 816 is rotated to enable the movable half-ring 815 to leave the double-pin 831, so that the motor end cylinder 812 and the dynamometer end cylinder 813 are separated.
When the electric dynamometer is used, the wire inlet unit 11 takes electricity from a public power grid and transmits the electricity to the test wire outlet unit 31, the test wire outlet unit 31 supplies power to the motor 7 to be tested to drive a motor rotating shaft to rotate, a rotor of the electric dynamometer body 6 is connected with an output shaft of the motor 7 to be tested through a coupler to convert kinetic energy generated by the rotation of the motor into electric energy, the electric energy is reversely fed back to the wire inlet unit 11 through the feeder unit 21, the control module collects output current through the antecedent current mutual inductance module and collects the magnitude of the current generated by the dynamometer through the backward current control module, the control module combines the resistance strips 102 of the resistance component 10 to add and subtract load, the inner rotating ring 103 is connected with the servo motor, the inner rotating ring 103 is precisely rotated, so that the plurality of resistance strips 102 are connected in series in different quantities, the resistance component 10 consumes the redundant electric energy generated by the dynamometer, and when the calibration is needed, the threaded shaft 816 is rotated to make the movable half ring 815 leave the double-plug 831, the motor end cylinder 812 and the dynamometer end cylinder 813 are separated, the square groove disc 93 of the cross 92 is inserted into the rotor connecting block 97, and the cross 92 is finally kept in a balanced state under the action of the balancing weight 96 and the hinge.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the embodiments and descriptions given above are only illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides an electric power dynamometer machine prevents reverse transmission of electricity calibration device, includes first switch board (1), second switch board (2), third switch board (3), fourth switch board (4) and base (5), its characterized in that: the first power distribution cabinet (1), the second power distribution cabinet (2), the third power distribution cabinet (3) and the fourth power distribution cabinet (4) are internally provided with a wire inlet unit (11), a feeder line unit (21), a test wire outlet unit (31) and a load unit (41) respectively, the top of the base (5) is movably connected with a sliding plate (51) through a sliding rail, the top of the sliding plate (51) is fixedly connected with a dynamometer body (6), the top of the base (5) is fixedly connected with a motor (7) to be tested, and one end of a rotor of the dynamometer body (6) is fixedly connected with a calibration assembly (9);
the power meter comprises a wire inlet unit (11), a test wire outlet unit (31), a dynamometer body (6), a load unit (41), a wire inlet unit (11), a test wire outlet unit (31), a dynamometer body and a power supply unit (11), wherein the wire inlet unit (11) is connected with a public power grid;
the load unit (41) comprises an advanced current mutual inductance module, a control module, an indication module, an electromechanical module, a resistance assembly (10) and a backward current mutual inductance module, the control module is in bidirectional electric connection with the advanced current mutual inductance module and the backward current mutual inductance module, the input end of the indication module and the input end of a relay module are in electric connection with the output end of the control module, the input end of the resistance assembly (10) is in electric connection with the output end of the relay module, the test wire outlet unit (31) and the feeder line unit (21) are respectively in bidirectional electric connection with the advanced current mutual inductance module and the backward current mutual inductance module, and the output end of the resistance assembly (10) is in electric connection with the input end of the test wire outlet unit (31);
the rotating shaft of the motor (7) to be tested and the rotating shaft of the dynamometer body (6) are located on the same straight line and are fixedly connected through a coupling assembly (8), the coupling assembly (8) comprises a coupling barrel (81), the bottom and the top of the coupling barrel (81) are fixedly connected with baffle rings (811), the coupling barrel (81) is divided into a motor end barrel (812) and a dynamometer end barrel (813), the motor end barrel and the dynamometer end barrel are respectively located on the output shaft of the motor (7) to be tested, the dynamometer end barrel and the dynamometer end barrel are located on the rotor end of the dynamometer body (6), opposite ends of the rotating shafts of the motor (7) to be tested and the dynamometer body (6) are fixedly connected with a male plug (82) and a female plug (83), and the male plug (82) and the female plug (83) are fixedly connected with a double plug pin (831) through non-rotating shaft fixed connection of a rotary table;
the calibration assembly (9) comprises a cross (92), a square groove plate is fixedly connected to the center of the cross (92), a rotor connecting block (97) fixedly connected to a rotor of the dynamometer body (6) is inserted into the square groove plate, a main ring (91) is fixedly connected to the outer ring of the cross (92), sector plates (94) are fixedly connected between the top end and one end of the cross (92) and between the bottom and the other end of the cross (92), a through shaft (95) is fixedly connected to the center line of the long shaft of the sector plate (94), hanging chains located at the front and rear portions of the cross (92) are movably connected to the through shaft (95) through bearings, and a balancing weight (96) is fixedly connected to the bottom of each hanging chain;
the resistor assembly (10) comprises insulating double rings (101), inner rotating rings (103) are arranged on inner rings of the insulating double rings (101), resistor strips (102) in an annular array are fixedly connected between the insulating double rings (101), and contact blocks (1031) are fixedly connected to outer rings of the inner rotating rings (103);
the inner ring joint of the coupling cylinder (81) is fixedly connected and lapped with a fixed semi-ring (814) and a movable semi-ring (815) respectively, the groove side of the fixed semi-ring (814) is movably connected with a threaded shaft (816) through a bearing, and the threaded shaft (816) and the movable semi-ring (815) are in threaded connection and penetrate through the side part of the coupling cylinder (81);
the double-pin (831) is inserted between the movable half ring (815) and the fixed half ring (814), the bottoms of the rotating discs of the male plug (82) and the female plug (83) are in lap joint with the top of the threaded shaft (816), a combined plug (84) is arranged between the motor end cylinder (812) and the dynamometer end cylinder (813), and the combined plug (84) is formed by fixedly connecting one sides, far away from the double-pin (831), of the male plug (82) and the female plug (83).
2. The anti-reverse power transmission calibration device of the electric dynamometer according to claim 1, wherein: the top and the bottom of the resistor strip (102) on two sides of the upper half vertical part of the gap between the ring bodies of the insulating double rings (101) are respectively provided with a conducting wire, and the conducting wire of the inner ring of the resistor strip (102) penetrates through the surface of the inner ring of the insulating double ring inner ring and is lapped with the contact block (1031).
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| CN201911362365.8A CN110988775B (en) | 2019-12-26 | 2019-12-26 | Anti-reverse power transmission calibration device for electric dynamometer |
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| CN110361649A (en) * | 2019-08-12 | 2019-10-22 | 北京理工大学 | A kind of motor correlation calibration system and scaling method based on dynamometer machine and simulated calibration |
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