CN105094164A - Flexible shaft torque overload protection method and flexible shaft with torque overload protection - Google Patents
Flexible shaft torque overload protection method and flexible shaft with torque overload protection Download PDFInfo
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- CN105094164A CN105094164A CN201510495273.2A CN201510495273A CN105094164A CN 105094164 A CN105094164 A CN 105094164A CN 201510495273 A CN201510495273 A CN 201510495273A CN 105094164 A CN105094164 A CN 105094164A
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Abstract
The invention discloses a flexible shaft with torque overload protection and a flexible shaft torque overload protection method. The flexible shaft with torque overload protection comprises a flexible shaft. One end of the flexible shaft is connected with a motor and the other end is connected with a load device. The flexible shaft is connected with an information acquisition device for detecting rotation angles at two ends of the flexible shaft or torque. The information acquisition device is electrically connected with a control device. The control device is electrically connected with the motor for controlling the motor to work. The rotation angles at two ends of the flexible shaft or the flexible shaft torque is acquired by the information acquisition device, the obtained data are transmitted to the connected control device, the control device calculates an angle difference at two ends of the flexible shaft according to the received information and a specified formula, the obtained result is compared with a built-in standard value, the control device controls the motor to work according to the comparison result, and thus, the flexible shaft is protected, and the problems that due to an over large torsion angle difference at two ends of the flexible shaft, permanent deformation happens and the motor and the load device at two ends of the flexible shaft are influenced can be solved.
Description
Technical field
The present invention relates to the method for torque overload protection and a kind of flexible axle, especially a kind of method of flexible axle torque overload protection and the flexible axle of band torque overload protection.
Background technology
Flexible axle is a kind of transmission shaft of flexibility, formed by multilayer steel wire wound, be used for transmitting and rotate and torque, the common application of flexible axle as shown in Figure 1, flexible axle one end connects power source (motor), and the other end of flexible axle connects load device, the rotation of motor and transmission of torque to load device, are completed setting task by flexible axle.
Due to the flexible speciality of flexible axle, in the transmission process of flexible axle, the two ends of flexible axle have asynchrony phenomenon, especially when electric motor starting or load device end stall, flexible axle two ends have angle reverse nonsynchronous situation occur, as motor just start time, the motor side of moment of torsion starts to reverse, and the other end (load device end) not yet synchronous axial system, so in the instant of electric motor starting, flexible axle two ends have angle to reverse.Another situation is, load device end just in case fault unexpected stall when, and now motor does not stop, also be rotated further, this time, flexible axle also can be twisted, and now as closed down motor not in time, flexible axle can be caused to exceed maximum application moment of torsion, cause flexible axle permanent strain even to rupture, even likely also involve motor and burn in the lump.
Summary of the invention
Object of the present invention is exactly to solve the above-mentioned problems in the prior art, the flexible axle of a kind of method providing flexible axle torque overload to protect and the protection of band torque overload.
Object of the present invention is achieved through the following technical solutions:
The guard method of a kind of flexible axle torque overload, comprises the steps:
S1, information acquisition step: information collecting device gathers the anglec of rotation at flexible axle two ends or the moment of torsion of flexible axle, and the data obtained is transferred to connected control device;
S2, comparison step: described control device is according to the information received and specify the windup-degree at flexible axle two ends described in formulae discovery poor, and result of calculation or the moment of torsion recorded and built-in standard value are compared;
S3, Electric Machine Control step: described control device, according to comparative result, controls the work of described motor.
Preferably, described flexible axle torque overload guard method, wherein: in described S3 step, record the differential seat angle at described flexible axle two ends or moment of torsion when being more than or equal to the first standard value, described control device sends the order stopping motor; Record described differential seat angle or moment of torsion when being in the second standard value, described control device reduces the rotating speed of described motor in proportion; Record described differential seat angle or moment of torsion when being less than the second standard value, do not adjust the duty of described motor.
Preferably, described flexible axle torque overload guard method, wherein: described first standard value is 95% of flexible axle maximum twist angle or peak torque.
Preferably, described flexible axle torque overload guard method, wherein: described second standard value is the 85%-95% of flexible axle maximum twist angle or peak torque.
Preferably, described flexible axle torque overload guard method, wherein: the ratio that the rotating speed of described motor reduces is [maximum twist angle/(maximum twist angle-record torsion angle difference)] * 0.01.
A kind of flexible axle with torque overload protection; comprise flexible axle; one end of described flexible axle connects motor; the other end connects load device; described flexible axle is connected with the information collecting device for detecting the flexible axle two ends anglec of rotation or flexible axle moment of torsion; described information collecting device is electrically connected to a control device, and described control device is electrically connected to described motor, and controls described machine operation.
Preferably, the flexible axle of described band torque overload protection, wherein: described information collecting device is the one in photoelectric encoder, torsion angle phase difference sensor.
Preferably, the flexible axle of described band torque overload protection, wherein: described control device is the one in programmable logic controller (PLC), single-chip microcomputer.
Preferably, the flexible axle of described band torque overload protection, wherein: described control device is electrically connected with audible-visual annunciator.
The advantage of technical solution of the present invention is mainly reflected in:
Deft design of the present invention, simple to operate, accommodation can be carried out according to the duty of the real work situation of the flexible axle pair motor be connected with flexible axle, avoid flexible axle because the windup-degree at two ends exceedes maximum bearing and reverse angle thus occur irreversible permanent strain, cause the problem that flexible axle is wasted, be conducive to cost-saving; Simultaneously owing to being provided with multiple regulation and control instruction, make it possible to adjust according to the different operating situation of flexible axle, avoid stopping motor causing the reduction of work efficiency immediately; The process control of robotization is conducive to the whole work efficiency of raising system.
Owing to being provided with audible-visual annunciator, and reserve warning amount in advance, when the differential seat angle at flexible axle two ends is greater than the alarming value of specifying, can report to the police in time, remind staff pay close attention to and adjust system.
Accompanying drawing explanation
Fig. 1 is the structural representation in background technology;
Fig. 2 is the structural front view of the embodiment of the present invention 1.
Embodiment
Object of the present invention, advantage and disadvantage, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below.These embodiments are only the prominent examples of application technical solution of the present invention, allly take equivalent replacement or equivalent transformation and the technical scheme that formed, all drop within the scope of protection of present invention.
Embodiment 1
In order to avoid the damage of the flexible axle permanent deformation that causes under there is kind of the failure condition of two described in background technology and the motor that may cause and load device, now whole drive path is optimized, monitoring feedback unit is added in drive path, when finding that flexible axle two ends windup-degrees difference or moment of torsion reach the certain value that flexible axle can bear, send instruction at once and be given to the running of Electric Machine Control motor, avoid motor to continue transmission or too fast flexible axle permanent strain and the flexible axle of causing of rotating speed is out of shape the motor/load plant failure that may cause.
Concrete, a kind of flexible axle with torque overload protection that the present invention discloses, as shown in Figure 2, comprise flexible axle 1, described flexible axle 1 can be known any flexible axle, in this way Wound-rotor type, universal coupling formula or spring.
One end of described flexible axle 1 connects motor 2, the other end connects load device 3, it is characterized in that: on described flexible axle 1, be connected with the information collecting device 4 for detecting the anglec of rotation or flexible axle moment of torsion, described information collecting device 4 is preferably photoelectric encoder, described photoelectric encoder is the sensor by opto-electronic conversion, the geometry of machinery displacement on output shaft being converted to pulse or digital quantity, described photoelectric encoder is 2 and is set in the two ends of described flexible axle 1 respectively, described photoelectric encoder is all electrically connected to a control device 5, described control device 5 is programmable logic controller (PLC)s, one in single-chip microcomputer, be preferably programmable logic controller (PLC), described programmable logic controller (PLC) adopts the storer that can program to perform stored logic computing and sequential control, regularly, the instruction of the operation such as counting and arithmetical operation, and by input (I) that is digital or that simulate and output (O) interface, control various types of plant equipment or production run, described programmable logic controller (PLC) is electrically connected to described motor 2, and controls described motor 2 and work.
Consider that the space structure of each parts may produce to influence each other, described programmable logic controller (PLC) can be arranged on described motor 2 or load device 3, is preferably arranged on motor 2, and by wire and described photoelectric encoder wired connection; Certainly, described programmable logic controller (PLC) and described photoelectric encoder also can carry out both-way communication by wireless communication module, realize wireless connections; Now, the installation site of described programmable logic controller (PLC) is not limited to flexible axle near zone, can further adjust, and to make the space structure of each parts more reasonable, reduces the mutual interference of each parts.
Further, described programmable logic controller (PLC) is also wired or be wirelessly connected with audible-visual annunciator 6, and controls described audible-visual annunciator 6 and work; When described programmable logic controller (PLC) according to described photoelectric encoder detect data show that the windup-degree difference at described flexible axle 1 two ends or moment of torsion reach 95% of maximum twist angle or peak torque time, described programmable logic controller (PLC) starts described audible-visual annunciator 6 and reminds staff to note.
During the flexible axle practical application of above-mentioned band torque overload protection, its course of work is as follows:
S1, information acquisition step: the information collecting device 4 at described flexible axle 1 two ends, namely photoelectric encoder gathers the anglec of rotation at described flexible axle 1 two ends respectively, and the data obtained is transferred to connected control device 5, i.e. described programmable logic controller (PLC);
S2, comparison step: described programmable logic controller (PLC) receives the data of described photoelectric encoder transmission, and the windup-degree at flexible axle 1 two ends is poor according to built-in formulae discovery, then acquired results and built-in standard value is compared; Wherein, described standard value comprises the first standard value, the second standard value, described first standard value is 95% of flexible axle maximum twist angle or peak torque, the permission torsion angle value of general transmission shaft and flexible axle is 0.5 ° ~ 1 °/m, require that the permission torsion angle value of high flexible axle is 0.25 ° ~ 0.5 °/m, require that the permission torsion angle value of lower flexible axle is 1 ° ~ 2 °/m; Described second standard value is the 85%-95% of flexible axle maximum twist angle or peak torque, comprises two end points 85% and 95%.
S3, Electric Machine Control step: described programmable logic controller (PLC), according to comparative result, controls the work of described motor 2.Concrete, described programmable logic controller (PLC) operationally carries out the control of described motor 2 according to following process: when according to the numerical evaluation recorded, described programmable logic controller (PLC) show that the windup-degree at described flexible axle 1 two ends is poor or moment of torsion is more than or equal to described first standard value, described programmable logic controller (PLC) sends the order stopping motor 2; When recording described windup-degree difference or flexible axle moment of torsion is in the second standard value, described programmable logic controller (PLC) reduces the rotating speed of described motor 2 in proportion, wherein, the ratio that the rotating speed of described motor 2 reduces is [maximum twist angle/(maximum twist angle-record torsion angle difference)] * 0.01, under this formula, when the windup-degree difference recorded or flexible axle moment of torsion larger, then to reduce the rotating speed ratio of described motor 2 larger for described programmable logic controller (PLC); On the contrary, when the windup-degree difference recorded or flexible axle moment of torsion less, then to reduce the rotating speed ratio of described motor 2 also less for described programmable logic controller (PLC), and reduction method and the real work situation of this rotating speed are fitted more, science more, farthest can ensure work efficiency; When recording described windup-degree difference or flexible axle moment of torsion is less than the second standard value, do not adjust the duty of described motor 2.
Embodiment 2
The present embodiment is identical with the one-piece construction of embodiment 1, its distinctive points is: described information collecting device 4 is set to torsion angle phase difference sensor, described torsion angle phase difference sensor is for measuring the torque capacity of flexible axle, it is by being installed with two groups of numbers of teeth at the two ends of flexible axle, shape and the identical gear of setting angle, one is respectively installed with close to (magnetic or light) sensor in the outside of gear, when rotating soft axle, this two sensors just can measure two group pulse ripples, relatively the phase differential on the edge, front and back of this two group pulses ripple just can calculate the torque capacity that elastic shaft bears.Its principle of work is identical with embodiment 1, does not repeat them here.
The present invention still has numerous embodiments; as as described in information collecting device can also be the device, high-performance wireless torque sensor etc. of being measured flexible axle moment of torsion by strain measurement technology; all employing equivalents or equivalent transformation and all technical schemes formed, all drop within protection scope of the present invention.
Claims (9)
1. a flexible axle torque overload guard method, is characterized in that: comprise the steps:
S1, information acquisition step: information collecting device (4) gathers the anglec of rotation at flexible axle (1) two ends or the moment of torsion of flexible axle, and the data obtained is transferred to connected control device (5);
S2, comparison step: described control device (5) is according to the information received and specify the windup-degree at flexible axle (1) two ends described in formulae discovery poor, and result of calculation or the moment of torsion recorded and built-in standard value are compared;
S3, Electric Machine Control step: described control device (5), according to comparative result, controls the work of described motor (2).
2. flexible axle torque overload according to claim 1 guard method, it is characterized in that: in described S3 step, record the differential seat angle at described flexible axle (1) two ends or moment of torsion when being more than or equal to the first standard value, described control device (5) sends the order stopping described motor (2); Record described differential seat angle or moment of torsion when being in the second standard value, described control device (5) reduces the rotating speed of described motor (2) in proportion; Record described differential seat angle or moment of torsion when being less than the second standard value, do not adjust the duty of described motor (2).
3. flexible axle torque overload according to claim 2 guard method, is characterized in that: described first standard value is 95% of flexible axle maximum twist angle or peak torque.
4. flexible axle torque overload according to claim 2 guard method, is characterized in that: described second standard value is the 85%-95% of flexible axle maximum twist angle or peak torque.
5. flexible axle torque overload according to claim 2 guard method, is characterized in that: the ratio that the rotating speed of described motor (2) reduces is [maximum twist angle/(maximum twist angle-record torsion angle difference)] * 0.01.
6. the flexible axle with torque overload protection; comprise flexible axle (1); one end of described flexible axle (1) connects motor (2); the other end connects load device (3); it is characterized in that: on described flexible axle (1), be connected with the information collecting device (4) for detecting the flexible axle two ends anglec of rotation or flexible axle moment of torsion; described information collecting device (4) is electrically connected to a control device (5); described control device (5) is electrically connected to described motor (2), and controls described motor (2) work.
7. the flexible axle of band torque overload protection according to claim 6, is characterized in that: described information collecting device (4) is the one in photoelectric encoder, torsion angle phase difference sensor.
8. the flexible axle of band torque overload protection according to claim 6, is characterized in that: described control device (5) is the one in programmable logic controller (PLC), single-chip microcomputer.
9., according to the flexible axle of the arbitrary described band torque overload protection of claim 6-8, it is characterized in that: described control device (5) is electrically connected with audible-visual annunciator (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510495273.2A CN105094164B (en) | 2015-08-13 | 2015-08-13 | The method and the flexible axle with torque overload protection of flexible axle torque overload protection |
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| CN201510495273.2A CN105094164B (en) | 2015-08-13 | 2015-08-13 | The method and the flexible axle with torque overload protection of flexible axle torque overload protection |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112945289A (en) * | 2021-03-08 | 2021-06-11 | 徐州淮海电子传感工程研究所有限公司 | Sensor detection device |
| CN113824270A (en) * | 2020-06-19 | 2021-12-21 | 哈尔滨理工大学 | A rotating electrical machine overload protection device |
| CN115793733A (en) * | 2022-11-24 | 2023-03-14 | 联宝(合肥)电子科技有限公司 | Rotating shaft torque adjusting method and device, electronic equipment and storage medium |
| WO2026037180A1 (en) * | 2024-08-15 | 2026-02-19 | 苏州中天医疗器械科技有限公司 | Apparatus and method for protecting flexible shaft of thrombus volume reduction rotary cutting device |
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2015
- 2015-08-13 CN CN201510495273.2A patent/CN105094164B/en active Active
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113824270A (en) * | 2020-06-19 | 2021-12-21 | 哈尔滨理工大学 | A rotating electrical machine overload protection device |
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| WO2026037180A1 (en) * | 2024-08-15 | 2026-02-19 | 苏州中天医疗器械科技有限公司 | Apparatus and method for protecting flexible shaft of thrombus volume reduction rotary cutting device |
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