CN113865785B - Braking torque loading device for dynamic torque sensor calibration and application method thereof - Google Patents
Braking torque loading device for dynamic torque sensor calibration and application method thereof Download PDFInfo
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- CN113865785B CN113865785B CN202111112011.5A CN202111112011A CN113865785B CN 113865785 B CN113865785 B CN 113865785B CN 202111112011 A CN202111112011 A CN 202111112011A CN 113865785 B CN113865785 B CN 113865785B
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- 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
- G01L25/003—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency for measuring torque
Abstract
The invention discloses a braking torque loading device for calibrating a dynamic torque sensor and a use method thereof, wherein the device comprises a stand column, a hydraulic expansion sleeve, a magnetic powder brake fixing plate, a column sleeve, a magnetic powder brake, a lifting thread sleeve, a screw rod, a coupler, an electromagnetic clutch, a diaphragm coupler, a lower limit switch, an upper limit switch, a screw rod power mechanism, a driving mechanism and a control system, wherein the screw rod power mechanism comprises an asynchronous motor and a worm gear mechanism, the driving mechanism comprises a 90-degree speed reducer, a torque rotating speed sensor and a servo motor, and the control system comprises a driving control cabinet 20 and an industrial personal computer; the invention can generate step dynamic moment, is mainly applied to the calibration device of the braking dynamic torque sensor, and solves the problems of complex structure, high manufacturing cost and high calibration cost of the existing braking torque loading device.
Description
Technical Field
The invention relates to a braking torque loading device for dynamic torque sensor calibration and a using method thereof, belonging to the technical field of torque sensor calibration.
Background
The torque sensor is widely applied to various fields of aviation, aerospace, ships, automobiles, oil drilling and the like, and in a mechanical transmission system, the torque is an important parameter for measuring and calculating the output power of a power system and an important index for monitoring the working state and the health condition of the power system. Because the torque value transmitted by the power system is changed in the rotating or swinging process, the dynamic parameter of the torque sensor is an important reference standard for measuring whether the torque sensor meets the measurement requirement, and the dynamic parameter is calibrated before the dynamic torque is applied in the application occasion of measuring the dynamic torque parameter, so that the accuracy and reliability of the measured parameter are ensured.
So far, the tracing of dynamic torque parameters is still a difficult problem to be solved in the industry, a great deal of related research work is carried out at home and abroad, and main testing methods comprise a negative step method, an impact method and a sine excitation method. The negative step method is to apply moment by using weights, remove the moment within tens of microseconds, and measure the vibration parameters of the sensor to analyze the natural frequency and damping, and the current domestic possible technical indexes are as follows: amplitude ranges (1-200) Nm and frequency ranges (0.1-100 Hz), and the amplitude gradually decreases along with the rising of the frequency; the impact method is to excite the sensor by utilizing pulse force, and to obtain the natural frequency and damping of the torque sensor by collecting the output signal of the torque sensor, the output signal of the force hammer and the output signal of the acceleration sensor for modal analysis, wherein the current domestic possible technical indexes are as follows: amplitude range (0-5) Nm, and pulse width is not more than 3ms; the sine excitation method utilizes a vibration exciter and a dynamic force sensor to carry out sine excitation on the torque sensor by matching with a force arm, and measures damping and resonance frequency of the torque sensor, and the current domestic possible technical indexes are as follows: the amplitude range (10-100) Nm and the time constant are not less than 0.05ms.
In addition, the relevant metering mechanism adopts a comparison method to calibrate dynamic torque parameters, namely, under the condition of applying dynamic sweep frequency moment, the output values of the standard torque sensor and the calibrated torque sensor are compared, the standard torque sensor is a dynamic torque sensor purchased abroad, and the frequency and torque amplitude range is limited. In the aspect of dynamic torque parameter calibration, the German PTB adopts a calibration method that a torque motor is used as a sine torque excitation device, a pendulum bob and an acceleration measuring device are matched, and the output value of a torque sensor is compared with a calculated value according to the moment of inertia and the acceleration value of the pendulum bob, and the technical indexes are as follows: amplitude range (0-20) Nm, frequency range (0-1000) Hz, and amplitude gradually decreases with rising frequency.
In summary, the prior art has a limited calibration amplitude range for the torque sensor, and cannot calibrate the torque sensor with a larger amplitude range.
Based on the above problems, the chinese patent No. 2019112854829 discloses a device and a method for dynamically calibrating a torque sensor by a braking natural frequency method, which comprises a mechanical calibration device and an electrical control system, wherein the mechanical calibration device comprises a foundation, a support frame, a servo motor, a clutch, a connecting shaft, a brake, a lower coupler, a torque sensor, an upper coupler, a standard inertia disc, an air bearing, a glass round grating and a grating reading head; the electric control system comprises an angle signal conditioning and collecting device, a torque measuring instrument, a brake control device, a motor control device and a computer. The calibration amplitude of the torque sensor can be effectively improved by comparing and calibrating the torque amplitude curve measured by the grating reading head with the torque waveform measured by the torque measuring instrument.
The brake is an excitation device for calibrating a dynamic torque sensor, and the existing dynamic torque sensor calibration device in China at present is divided according to an excitation mode and comprises a sine-method dynamic torque calibration device and a negative-step-method dynamic torque calibration device. The sine method dynamic torque sensor calibration device adopts an angular swinging type torque motor as an excitation device, the type of torque motor needs to overcome larger inertia effect during movement, and the internal structure and the control system are complex and have higher cost; the exciting device of the dynamic torque sensor calibration device of the negative step method is a rotary torque motor and an explosion bolt, after the torque motor applies stable torque, the explosion bolt detonates, the torque is instantaneously unloaded, and negative step loading is realized, but the explosion bolt has higher cost.
Therefore, it is needed to develop a new braking torque loading device, which is not only used for dynamic calibration of a torque sensor by a braking natural frequency method, but also solves the problems of complex structure, high manufacturing cost and high calibration cost of the current torque loading device (exciting device), and can be used on test equipment needing dynamic torque excitation.
Disclosure of Invention
Based on the problems, the invention provides a braking torque loading device for calibrating a dynamic torque sensor and a use method thereof, which simplify the structure of the device and greatly reduce the calibration cost and the equipment cost of the dynamic torque sensor.
The technical scheme adopted by the invention is that the braking torque loading device for calibrating the dynamic torque sensor comprises: the magnetic powder brake comprises upright posts, an upper limit switch, a lower limit switch, magnetic powder brake fixing plates, magnetic powder brakes, a screw rod, a coupler, an electromagnetic clutch, a diaphragm coupler, a screw rod power mechanism, a driving mechanism and a control system, wherein four upright posts are vertically arranged at intervals of a preset distance in a matrix, the upper limit switch and the lower limit switch are respectively arranged on the upright posts at intervals of a preset distance, two groups of magnetic powder brake fixing plates are horizontally arranged at intervals of a preset distance between the upper limit switch and the lower limit switch, four corners of the magnetic powder brake fixing plates are rigidly connected with column sleeves through screws, the column sleeves are arranged on the upright posts and are connected with the upright posts through hydraulic expansion sleeves, magnetic powder brakes are rigidly connected between the two groups of magnetic powder brake fixing plates, a magnetic powder brake main shaft is coaxial with the central axis of the magnetic powder brake fixing plates, the upper end and the lower end of the magnetic powder brake main shaft respectively penetrate through the two groups of the magnetic powder brake fixing plates, the lower end of the magnetic powder brake main shaft is coaxially rigidly connected with the coupler through expansion sleeves, the coupler is coaxially connected with the electromagnetic clutch through a key, the lower end of the electromagnetic clutch is connected with the diaphragm coupler through an expansion sleeve, the diaphragm coupler is connected with the driving mechanism, the magnetic powder brake fixing plates are positioned on two sides of the lifting and the lifting mechanism through the lifting mechanism, the lifting mechanism is in a thread-type, and is connected with the screw rod power mechanism, and the lifting mechanism is connected with the screw rod power mechanism through the lifting mechanism;
when the hydraulic expansion sleeve is expanded, the magnetic powder brake fixing plate is fixedly connected with the upright post through the column sleeve, and when the hydraulic expansion sleeve is loosened, the column sleeve is not connected with the upright post, and the magnetic powder brake fixing plate can move up and down.
Preferably, the braking torque loading device further comprises a foundation and a steel base, wherein the foundation is made of reinforced concrete, a groove is formed in the foundation, foundation bolts are arranged on the foundation, the steel base is horizontally arranged on the foundation and is rigidly connected with the foundation through nuts and the foundation bolts, T-shaped through holes are formed in the steel base, and the upright post is fastened on the steel base through the T-shaped through holes by adopting nuts and expansion sleeves.
Preferably, the driving mechanism comprises a 90-degree speed reducer, a torque rotating speed sensor and a servo motor which are arranged in the foundation groove, an output shaft of the 90-degree speed reducer is connected with the diaphragm coupler through a key, an input shaft of the 90-degree speed reducer is connected with the torque rotating speed sensor through a coupler, and the torque rotating speed sensor is connected with the servo motor through a coupler.
Preferably, the lower end of the screw rod is connected with the output end of the worm and gear mechanism, the input end of the worm and gear mechanism is connected with the asynchronous motor through a coupler, and the asynchronous motor is fixed on the steel base.
Preferably, the control system comprises a drive control cabinet and an industrial personal computer, wherein the magnetic powder brake, the electromagnetic clutch, the torque rotating speed sensor, the servo motor, the asynchronous motor, the lower limit switch and the upper limit switch are electrically connected with the drive control cabinet, and the drive control cabinet is electrically connected with the industrial personal computer.
Preferably, the lifting thread sleeve is positioned on a midline of a connecting line between the central axis of the magnetic powder brake fixing plate and the edge of the corresponding magnetic powder brake fixing plate.
Preferably, the distance between the upper limit switch and the lower limit switch is 500-650mm.
The application method of the braking torque loading device for dynamic torque sensor calibration comprises the following steps:
firstly, determining positions of an upper limit switch and a lower limit switch on an upright post when a test is started so as to ensure the lifting range of a magnetic powder brake, wherein a hydraulic expansion sleeve is in a loose state, and an electromagnetic clutch and a diaphragm coupler are in an unfastened connection state;
step two, sending an instruction to a drive control cabinet through an industrial personal computer, electrifying the asynchronous motor to rotate positively, and rotating a screw rod to lift the magnetic powder brake fixing plate so that the magnetic powder brake rises along with the magnetic powder brake, wherein when a column sleeve or the magnetic powder brake fixing plate touches an upper limit switch, the asynchronous motor stops rotating, and the screw rod stops lifting the magnetic powder brake fixing plate;
expanding the hydraulic expansion sleeve to ensure that the column sleeve is rigidly connected with the upright column, fixing the magnetic powder brake at a designed position, and ensuring that the electromagnetic clutch and the diaphragm coupler are in a fastening connection state;
step four, sending an instruction to a driving control cabinet through an industrial personal computer, and supplying power to an electromagnetic clutch by the driving control cabinet, wherein the electromagnetic clutch is attracted;
step five, the industrial personal computer sends an instruction to the driving control cabinet, the driving control cabinet supplies power to the servo motor and controls the rotation speed of the servo motor to rise until the rotation speed of the main shaft of the magnetic powder brake reaches a set rotation speed, and meanwhile, the industrial personal computer sends an instruction to the driving control cabinet, the driving control cabinet supplies power to the magnetic powder brake and enables the braking torque of the magnetic powder brake to rise gradually to a set braking torque, and in the process of rising the braking torque, the driving torque of the servo motor is increased gradually until the braking torque is equal to the driving torque;
step six, maintaining the rotating speed of the main shaft of the magnetic powder brake at a set value, and in the process, driving a control cabinet to acquire an output signal of a torque rotating speed sensor and sending the output signal to an industrial personal computer, wherein the industrial personal computer displays a moment and rotating speed change curve output by a servo motor at the stage on a display interface;
step seven, the industrial personal computer sends an instruction to the drive control cabinet, the drive control cabinet cuts off a power supply circuit of the electromagnetic clutch, so that the main shaft of the magnetic powder brake and a part connected with the main shaft only receive braking torque, and the rising time of the braking torque is equal to the time when the electromagnetic clutch is cut off, thereby realizing rapid loading of the braking torque;
and step eight, after the test is completed, the industrial personal computer sends an instruction to the driving control cabinet, the driving control cabinet cuts off a power supply circuit of the magnetic powder brake, the hydraulic expansion sleeve is loosened, the connecting part of the electromagnetic clutch and the diaphragm coupler is loosened, the industrial personal computer sends the instruction to the driving control cabinet, the asynchronous motor is electrified and reversely rotated, the screw rod rotates to enable the magnetic powder brake fixing plate to descend, the magnetic powder brake descends along with the descending, when the column sleeve or the magnetic powder brake fixing plate touches the lower limit switch, the asynchronous motor stops rotating, the magnetic powder brake stops descending, and the whole working process is finished.
Compared with the prior art, the invention has the beneficial effects that: the device and the method can generate step dynamic moment, the excitation time of the step dynamic moment is related to the separation time of the electromagnetic clutch, the ascending time parameter of the dynamic torque excitation curve is determined after the separation time constant of the electromagnetic clutch is determined, the electromagnetic clutch is not required to be replaced when the electromagnetic clutch is calibrated each time, and the device and the method are mainly applied to a brake type dynamic torque sensor calibration device.
According to the magnetic powder brake fixing plate, the column sleeve is connected with the upright column through the hydraulic expansion sleeve, the electromagnetic clutch is connected with the diaphragm coupler through the expansion sleeve, the fastening position can be adjusted up and down, the magnetic powder brake is adjusted up and down through the screw rod and the worm gear mechanism, the torque sensor is convenient to install, the use is flexible, and the applicability is strong.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a flow chart of a method of loading usage of the present invention;
FIG. 4 is a braking torque loading sub-flow chart of the present invention;
fig. 5 is a schematic view of the electrical connection of the present invention.
The marks in the figure: 1. the hydraulic expansion sleeve comprises a stand column, 2, a hydraulic expansion sleeve, 3, a magnetic powder brake fixing plate, 4, a column sleeve, 5, a magnetic powder brake, 6, a lifting thread sleeve, 7, a screw rod, 8, a coupler, 9, an electromagnetic clutch, 10, a diaphragm coupler, 11, a steel base, 12, a foundation, 13, a 90-degree speed reducer, 14, a torque rotation speed sensor, 15, a servo motor, 16, an asynchronous motor, 17, a worm and gear mechanism, 18, a lower limit switch, 19, an upper limit switch, 20, a drive control cabinet, 21 and an industrial personal computer.
Detailed Description
The invention will be further explained in relation to the drawings of the specification, so as to be better understood by those skilled in the art.
Example 1
As shown in fig. 1-2, a brake torque loading device for dynamic torque sensor calibration, comprising: the hydraulic pressure expanding sleeve 2, the magnetic powder brake fixed plate 3, the column sleeve 4, the magnetic powder brake 5, the lifting thread sleeve 6, the screw rod 7, the coupler 8, the electromagnetic clutch 9, the diaphragm coupler 10, the steel base 11, the foundation 12, the lower limit switch 18, the upper limit switch 19, the screw rod power mechanism, the driving mechanism and the control system; the screw power mechanism comprises an asynchronous motor 16 and a worm gear mechanism 17, and the driving mechanism comprises a 90-degree speed reducer 13, a torque rotation speed sensor 14 and a servo motor 15; the control system comprises a drive control cabinet 20 and an industrial personal computer 21.
The foundation 12 is made of reinforced concrete, a groove is formed in the foundation 12 and used for accommodating the 90-degree speed reducer 13, the torque rotation speed sensor 14, the servo motor 15 and the connecting and fixing device, foundation bolts are arranged on the foundation 12, the steel base 11 is horizontally placed on the foundation 12 and is rigidly connected with the foundation 12 through the nuts and the foundation bolts, T-shaped through holes are formed in the steel base 11, threads are formed in the lower end of the steel base, and the steel base 11 is fastened through the T-shaped through holes by adopting the nuts and the expansion sleeves.
The four stand columns 1 are vertically arranged on the steel base 11 at intervals of a preset distance in a matrix, and an upper limit switch 19 and a lower limit switch 18 are respectively arranged at the upper part of the stand columns 1 at intervals of 500-650mm, so that the installation of the magnetic powder brake 5 and the use of a torque sensor are met; the two groups of magnetic powder brake fixing plates 3 are horizontally arranged between the upper limit switch 19 and the lower limit switch 18 at intervals of a preset distance, four corners of each magnetic powder brake fixing plate 3 are rigidly connected with the column sleeve 4 through screws, the column sleeve 4 is sleeved on the column 1 and is connected with the column 1 through the hydraulic expansion sleeve 2, when the hydraulic expansion sleeve 2 is expanded, the magnetic powder brake fixing plates 3 are fixedly connected with the column 1 through the column sleeve 4, when the hydraulic expansion sleeve 2 is loosened, the column sleeve 4 is not connected with the column 1, and the magnetic powder brake fixing plates 3 can move up and down.
The upper end and the lower end of the main shaft of the magnetic powder brake 5 are respectively and rigidly connected between two groups of magnetic powder brake fixing plates 3 through 12 screws, so that measurement accuracy is guaranteed, the upper end and the lower end of the main shaft of the magnetic powder brake 5 penetrate through the two groups of magnetic powder brake fixing plates 3 respectively and are respectively connected with a coupler 8, the lower end of the main shaft of the magnetic powder brake 5 is coaxially and rigidly connected with the coupler 8 through a swelling sleeve, the coupler 8 is coaxially connected with an electromagnetic clutch 9 through a key, swelling sleeves are arranged at the upper end and the lower end of a diaphragm coupler 10, a connecting shaft is arranged at the lower end of the electromagnetic clutch 9, the connecting shaft at the lower end of the electromagnetic clutch 9 is connected with the diaphragm coupler 10 through the swelling sleeves, the swelling sleeves are loosened, the hydraulic swelling sleeves 2, the magnetic powder brake fixing plates 3, a column sleeve 4, the magnetic powder brake 5, a lifting thread sleeve 6, the coupler 8 and the electromagnetic clutch 9 can change the upper position and the lower position when a lead screw 7 rotates, and the electromagnetic clutch 10 is locked with the diaphragm coupler 10 through the swelling sleeves after reaching a preset position.
The magnetic powder brake fixing plate 3 is used for installing and fixing the magnetic powder brake 5, the column sleeve 4 is adopted by the magnetic powder brake fixing plate 3 to be connected with the upright column 1 through the hydraulic expansion sleeve 2, so that the mechanical abrasion of the device is reduced, the whole supporting structure is ensured to have enough rigidity, the usability and the measurement accuracy are improved, the height of the magnetic powder brake 5 can be flexibly adjusted when the hydraulic expansion sleeve 2 is loosened, the installation of a torque sensor during calibration is facilitated, and the applicability is strong; the electromagnetic clutch 9 is connected with the driving mechanism through the diaphragm coupler 10, on one hand, the diaphragm coupler 10 can compensate radial, axial and angular offset between the two, so that the measurement accuracy is ensured, and on the other hand, the connection fastening position of the electromagnetic clutch 9 and the diaphragm coupler 10 can be adjusted, so that the up-and-down movable adjustment of the magnetic powder brake fixing plate 3 and the magnetic powder brake 5 is realized.
Specifically, the driving mechanism comprises a 90-degree speed reducer 13, a torque rotating speed sensor 14 and a servo motor 15, wherein the 90-degree speed reducer 13, the torque rotating speed sensor 14 and the servo motor 15 are arranged in a groove of a foundation 12, an output shaft of the 90-degree speed reducer 13 is connected with a diaphragm coupler 10 through a key, an input shaft of the 90-degree speed reducer 13 is connected with the torque rotating speed sensor 14 through a coupler, and the torque rotating speed sensor 14 is connected with the servo motor 15 through a coupler.
In this embodiment, the lower end of the screw rod 7 is connected with the output end of the worm gear mechanism 17, the input end of the worm gear mechanism 17 is connected with the asynchronous motor 16 through a coupling, and the asynchronous motor 16 is fixed on the steel base 11.
As shown in fig. 5, the upper limit switch 19, the lower limit switch 18, the magnetic powder brake 5, the electromagnetic clutch 9, the driving mechanism and the screw power mechanism are electrically connected with a control system; the control system comprises a drive control cabinet 20 and an industrial personal computer 21, namely a magnetic powder brake 5, an electromagnetic clutch 9, a torque rotation speed sensor 14, a servo motor 15, an asynchronous motor 16, a lower limit switch 18 and an upper limit switch 19 are connected with the drive control cabinet 20 through wires, and the drive control cabinet 20 is connected with the industrial personal computer 21 through wires.
Example 2
3-4, a method for using a braking torque loading device for calibrating a dynamic torque sensor comprises the following steps:
firstly, when a test starts, the positions of an upper limit switch 19 and a lower limit switch 18 on an upright post 1 are determined to ensure the lifting range of a magnetic powder brake 5, a hydraulic expansion sleeve 2 is in a loose state, and an electromagnetic clutch 9 and a diaphragm coupler 10 are in an unfastened connection state;
step two, after the preparation work is finished, namely after other corresponding testing mechanisms are installed, an instruction is sent to a drive control cabinet 20 through an industrial personal computer 21, a forward rotation control circuit main switch of an asynchronous motor 16 is closed, the asynchronous motor 16 is electrified to rotate forward, a lead screw 7 rotates to lift a magnetic powder brake fixing plate 3, so that a magnetic powder brake 5 rises along with the forward rotation control circuit main switch, when a column sleeve 4 or the magnetic powder brake fixing plate 3 touches an upper limit switch 19, the asynchronous motor 16 is disconnected, the asynchronous motor 16 stops rotating, a lead screw 7 stops lifting the magnetic powder brake fixing plate 3, the industrial personal computer 21 sends the instruction to the drive control cabinet 20, and the forward control circuit main switch of the asynchronous motor 16 is disconnected;
expanding the hydraulic expansion sleeve 2 to ensure that the column sleeve 4 is rigidly connected with the upright column 1, fixing the magnetic powder brake 5 at a designed position, and ensuring that the electromagnetic clutch 9 and the diaphragm coupler 10 are in a fastening connection state;
step four, sending an instruction to a drive control cabinet 20 through an industrial personal computer 21, and supplying power to the electromagnetic clutch 9 by the drive control cabinet 20, wherein the electromagnetic clutch 9 is attracted;
step five, the industrial personal computer 21 sends an instruction to the driving control cabinet 20, the driving control cabinet 20 supplies power to the servo motor 15 and controls the rotation speed of the servo motor 15 to rise until the rotation speed of the main shaft of the magnetic powder brake 5 reaches a set rotation speed, meanwhile, the industrial personal computer 21 sends an instruction to the driving control cabinet 20, the driving control cabinet 20 supplies power to the magnetic powder brake 5 and enables the braking torque of the magnetic powder brake 5 to rise gradually to a set braking torque, and in the process of rising the braking torque, the driving torque of the servo motor 15 is increased gradually until the braking torque is equal to the driving torque;
step six, maintaining the rotation speed of the main shaft of the magnetic powder brake 5 at a set value, in the process, driving the control cabinet 20 to collect the output signal of the torque rotation speed sensor 14 and send the output signal to the industrial personal computer 21, and displaying the moment and rotation speed change curve output by the servo motor 15 at the stage on a display interface by the industrial personal computer 21;
step seven, the industrial personal computer 21 sends an instruction to the drive control cabinet 20, the drive control cabinet 20 cuts off a power supply circuit of the electromagnetic clutch 9, so that a main shaft of the magnetic powder brake 5 and a part connected with the main shaft only receive braking torque, and the rising time of the braking torque is equal to the time for cutting off the electromagnetic clutch 9, thereby realizing rapid loading of the braking torque;
step eight, after the test is completed, the industrial personal computer 21 sends an instruction to the drive control cabinet 20, the drive control cabinet 20 cuts off a power supply circuit of the magnetic powder brake 5, the hydraulic expansion sleeve 2 is loosened, the connecting component of the electromagnetic clutch 9 and the diaphragm coupler 10 is loosened, the industrial personal computer 21 sends an instruction to the drive control cabinet 20, the main switch of the asynchronous motor 16 reverse rotation control circuit is closed, the asynchronous motor 16 is electrified and reversely rotates, the screw rod 7 rotates to enable the magnetic powder brake fixing plate 3 to descend, the magnetic powder brake 5 descends along with the main switch, when the column sleeve 4 or the magnetic powder brake fixing plate 3 touches the lower limit switch 18, the asynchronous motor 16 reversely rotates, the asynchronous motor 16 stops rotating, the magnetic powder brake 5 stops descending, the industrial personal computer 21 sends an instruction to the drive control cabinet 20, the main switch of the asynchronous motor 16 reverse control circuit is disconnected, and the whole working process is finished.
The device and the method can generate step dynamic moment, the excitation time of the step dynamic moment is related to the separation time of the electromagnetic clutch, and the device and the method are mainly applied to a brake type dynamic torque sensor calibration device.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (8)
1. A braking torque loading device for dynamic torque sensor calibration, comprising: the magnetic powder brake comprises upright posts (1), an upper limit switch (19), a lower limit switch (18), a magnetic powder brake fixing plate (3), magnetic powder brakes (5), a screw rod (7), a coupler (8), an electromagnetic clutch (9), a diaphragm coupler (10), a screw rod power mechanism, a driving mechanism and a control system, wherein four upright posts (1) are vertically arranged at intervals of a preset distance, the upper limit switch (19) and the lower limit switch (18) are respectively arranged on the upright posts (1) at intervals of a preset distance, two groups of magnetic powder brake fixing plates (3) are horizontally arranged at intervals of a preset distance between the upper limit switch (19) and the lower limit switch (18), four corners of the magnetic powder brake fixing plates (3) are rigidly connected with column sleeves (4) through screws, the column sleeves (4) are sleeved on the upright posts (1) and are connected with the upright posts (1) through hydraulic expansion sleeves (2), the magnetic powder brakes (5) are rigidly connected between the two groups of magnetic powder brake fixing plates (3), a main shaft of the magnetic powder brakes (5) is coaxial with the upright posts (3), the main shaft of the magnetic powder brakes (5) is coaxial with the magnetic powder brake fixing plates (3) at intervals, the main shaft of the magnetic powder brakes (5) are respectively, the magnetic powder brakes are respectively connected with the two ends of the magnetic powder brakes (8) through the coaxial magnetic powder brake fixing plates (8) through the coaxial expansion sleeves (8), the lower end of the electromagnetic clutch (9) is connected with the diaphragm coupler (10) through an expansion sleeve, the diaphragm coupler (10) is connected with the driving mechanism, lifting thread sleeves (6) are symmetrically arranged on two sides of the central axis of the magnetic powder brake fixing plate (3), a lead screw (7) is arranged in the lifting thread sleeves (6) to form a thread pair, the lower end of the lead screw (7) is connected with a lead screw power mechanism, and the upper limit switch (19), the lower limit switch (18), the magnetic powder brake (5), the electromagnetic clutch (9), the driving mechanism and the lead screw power mechanism are electrically connected with the control system;
when the hydraulic expansion sleeve (2) is expanded, the magnetic powder brake fixing plate (3) is fixedly connected with the upright post (1) through the column sleeve (4), and when the hydraulic expansion sleeve (2) is loosened, the column sleeve (4) is not connected with the upright post (1), and the magnetic powder brake fixing plate (3) can move up and down.
2. The braking torque loading device for calibrating the dynamic torque sensor according to claim 1, further comprising a foundation (12) and a steel base (11), wherein the foundation (12) is made of reinforced concrete, a groove is formed in the foundation (12), foundation bolts are arranged on the foundation (12), the steel base (11) is horizontally placed on the foundation (12) and is rigidly connected with the foundation (12) through nuts and the foundation bolts, T-shaped through holes are formed in the steel base (11), and the upright post (1) is fastened on the steel base (11) through the nuts and the expansion sleeves through the T-shaped through holes.
3. The braking torque loading device for calibrating a dynamic torque sensor according to claim 2, wherein the driving mechanism comprises a 90-degree speed reducer (13), a torque rotation speed sensor (14) and a servo motor (15) which are installed in a groove of a foundation (12), an output shaft of the 90-degree speed reducer (13) is connected with a diaphragm coupler (10) through a key, an input shaft of the 90-degree speed reducer is connected with the torque rotation speed sensor (14) through a coupler, and the torque rotation speed sensor (14) is connected with the servo motor (15) through a coupler.
4. The braking torque loading device for calibrating the dynamic torque sensor according to claim 1, wherein the lower end of the screw rod (7) is connected with the output end of a worm gear mechanism (17), the input end of the worm gear mechanism (17) is connected with an asynchronous motor (16) through a coupling, and the asynchronous motor (16) is fixed on a steel base (11).
5. The braking torque loading device for calibrating the dynamic torque sensor according to claim 4, wherein the control system comprises a driving control cabinet (20) and an industrial personal computer (21), the magnetic powder brake (5), the electromagnetic clutch (9), the torque rotation speed sensor (14), the servo motor (15), the asynchronous motor (16), the lower limit switch (18) and the upper limit switch (19) are electrically connected with the driving control cabinet (20), and the driving control cabinet (20) is electrically connected with the industrial personal computer (21).
6. The braking torque loading device for calibrating a dynamic torque sensor according to claim 1, wherein the lifting thread sleeve (6) is positioned on a midpoint line of a connecting line between a central axis of the magnetic powder brake fixing plate (3) and an edge of the corresponding magnetic powder brake fixing plate (3).
7. A dynamic torque sensor calibration braking torque loading device according to claim 1, characterized in that the distance between the upper limit switch (19) and the lower limit switch (18) is 500-650mm.
8. A method of using a dynamic torque sensor calibration braking torque loading device according to any one of claims 1 to 7, comprising the steps of:
firstly, when a test starts, the positions of an upper limit switch (19) and a lower limit switch (18) on a stand column (1) are determined, the lifting range of a magnetic powder brake (5) is ensured, a hydraulic expansion sleeve (2) is in a loose state, and an electromagnetic clutch (9) and a diaphragm coupler (10) are in an unfastened connection state;
step two, sending an instruction to a drive control cabinet (20) through an industrial personal computer (21), electrifying an asynchronous motor (16) to rotate positively, and rotating a lead screw (7) to lift a magnetic powder brake fixing plate (3) so that a magnetic powder brake (5) rises along with the lead screw, wherein when a column sleeve (4) or the magnetic powder brake fixing plate (3) touches an upper limit switch (19), the asynchronous motor (16) stops rotating, and the lead screw (7) stops lifting the magnetic powder brake fixing plate (3);
expanding the hydraulic expansion sleeve (2) to ensure that the column sleeve (4) is rigidly connected with the upright column (1), fixing the magnetic powder brake (5) at a designed position, and tightly connecting the electromagnetic clutch (9) with the diaphragm coupler (10);
step four, sending an instruction to a drive control cabinet (20) through an industrial personal computer (21), and supplying power to an electromagnetic clutch (9) by the drive control cabinet (20), wherein the electromagnetic clutch (9) is attracted;
step five, the industrial personal computer (21) sends an instruction to the driving control cabinet (20), the driving control cabinet (20) supplies power to the servo motor (15) and controls the rotation speed of the servo motor (15) to rise until the rotation speed of the main shaft of the magnetic powder brake (5) reaches a set rotation speed, meanwhile, the industrial personal computer (21) sends an instruction to the driving control cabinet (20), the driving control cabinet (20) supplies power to the magnetic powder brake (5) and enables the braking torque of the magnetic powder brake (5) to rise gradually to a set braking torque, and in the process of rising the braking torque, the driving torque of the servo motor (15) is increased gradually until the braking torque is equal to the driving torque;
step six, maintaining the rotating speed of the main shaft of the magnetic powder brake (5) at a set value, in the process, acquiring an output signal of a torque rotating speed sensor (14) by a driving control cabinet (20) and sending the output signal to an industrial personal computer (21), and displaying a moment and rotating speed change curve output by a servo motor (15) at the stage on a display interface by the industrial personal computer (21);
step seven, the industrial personal computer (21) sends an instruction to the drive control cabinet (20), the drive control cabinet (20) cuts off a power supply circuit of the electromagnetic clutch (9), and then a main shaft of the magnetic powder brake (5) and a part connected with the main shaft only receive braking torque, and the rising time of the braking torque is equal to the time of cutting off the electromagnetic clutch, so that the rapid loading of the braking torque is realized;
step eight, after the test is finished, the industrial personal computer (21) sends an instruction to the drive control cabinet (20), the drive control cabinet (20) cuts off a power supply circuit of the magnetic powder brake (5), the hydraulic expansion sleeve (2) is loosened, the connecting part of the electromagnetic clutch (9) and the diaphragm coupler (10) is loosened, the industrial personal computer (21) sends an instruction to the drive control cabinet (20), the asynchronous motor (16) is electrified and reversely rotated, the screw rod (7) rotates to enable the magnetic powder brake fixing plate (3) to descend, the magnetic powder brake (5) descends along with the instruction, and when the column sleeve (4) or the magnetic powder brake fixing plate (3) touches the lower limit switch (18), the asynchronous motor (16) stops rotating, the magnetic powder brake (5) stops descending, and the whole working process is finished.
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| CN202111112011.5A CN113865785B (en) | 2021-09-18 | 2021-09-18 | Braking torque loading device for dynamic torque sensor calibration and application method thereof |
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| CN113865785B true CN113865785B (en) | 2023-06-20 |
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| US7647808B2 (en) * | 2008-04-14 | 2010-01-19 | Junkers John K | Apparatus for calibration of fluid-operated power torque tools |
| CN101596870B (en) * | 2009-06-23 | 2011-11-16 | 江苏大学 | Self-excitation retarder drive controller |
| CN103323175B (en) * | 2013-06-07 | 2015-08-19 | 济南大学 | Multi-functional force loading device and six-dimension force sensor calibration method |
| CN106706207B (en) * | 2016-11-10 | 2019-02-26 | 合肥工业大学 | A kind of step force generating apparatus for force snesor dynamic calibration |
| CN107024350A (en) * | 2017-04-17 | 2017-08-08 | 哈尔滨工业大学 | High pulling torque freewheel clutch testing fatigue multi-function test stand |
| CN112393843A (en) * | 2020-11-26 | 2021-02-23 | 中国船舶重工集团公司第七0四研究所 | Combined torque measuring system with one machine for two purposes |
| CN113125072A (en) * | 2021-05-14 | 2021-07-16 | 贵州航天计量测试技术研究所 | Standard inertia device for torque sensor calibration and use method thereof |
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