CN110808676A - Energy-saving magnetic intelligent speed regulation coupling - Google Patents
Energy-saving magnetic intelligent speed regulation coupling Download PDFInfo
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- CN110808676A CN110808676A CN201911079094.5A CN201911079094A CN110808676A CN 110808676 A CN110808676 A CN 110808676A CN 201911079094 A CN201911079094 A CN 201911079094A CN 110808676 A CN110808676 A CN 110808676A
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- rotor
- magnetic
- energy
- speed regulation
- cage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
Abstract
The invention provides an energy-saving magnetic intelligent speed regulation coupling, and belongs to the technical field of electromagnetic speed regulation transmission. One end of the telescopic device is connected with the magnetic rotor, and one end of the cage-shaped rotor extends into the magnetic rotor; the telescopic device is connected with a closed-loop control system, and the telescopic state of the telescopic device is controlled by the closed-loop control system; the cage rotor can slide relatively to the magnetic rotor along the central shaft of the magnetic rotor to change the coupling area between the cage rotor and the magnetic rotor, so as to change the rotating speed, and the other end of the cage rotor is connected with a rotating shaft. The invention has high power transmission efficiency, relieves the problem of serious heating of the coupler, avoids the reduction of power factor of a power grid caused by the low-load operation of a motor, can replace a throttle valve, a mechanical coupler, a vortex coupler, a frequency converter and the like, realizes the speed regulation of a fan and a water pump according to requirements, controls the flow of the fan and the water pump, and achieves the effect of energy conservation.
Description
Technical Field
The invention relates to the technical field of electromagnetic speed regulation transmission, in particular to a magnetic intelligent speed regulation coupling which can replace a throttle valve, a mechanical coupling, an eddy coupling, a frequency converter and the like, realize speed regulation of a fan and a water pump according to requirements, control the flow of the fan and the water pump and achieve an energy-saving effect.
Background
The principle of the intelligent speed-regulating magnetic coupling is similar to that of a rotary induction motor, and the difference is that a magnetic rotor of the intelligent speed-regulating magnetic coupling is excited by a permanent magnet, and the rotary motor is excited by electricity. Compared with a rotating motor, the magnetic rotor of the intelligent speed regulation magnetic coupling does not have copper loss generated by a winding, so that the loss and the heating energy of the intelligent speed regulation magnetic coupling with reasonable design are reduced to be very low.
Another difference with the rotating motor is that the coupling area of the magnetic rotor and the induction rotor of the intelligent speed-regulating magnetic coupling can be adjusted according to the requirement. The coupling slip ratio of the coupler can be controlled by adjusting the coupling area of the stator magnetic rotor and the induction rotor, so that the speed of the fan water pump is adjusted.
According to the similarity law of the pumps, when the rotating speed of the fan and the water pump is reduced by 10%, the efficiency of the pump per se is improved, and the required electric energy is saved by 20%. Compared with a frequency converter, when the rotating speed is reduced by 10 percent at the same time, the efficiency of the pump is the same. However, the frequency converter has many disadvantages such as the need of replacing the frequency conversion motor, generation of harmonic wave, large initial investment, etc.
The traditional eddy current coupling rotor adopts a solid steel plate, a motor drives a magnetic rotor to rotate to generate a rotating magnetic field, and the rotating magnetic field generates induction eddy currents on the steel plate, so that electromagnetic force is generated to drive the induction rotor to rotate in a side load mode. The resistivity of the steel plate is high, and the axial edge effect enables an air gap magnetic field to be small and eddy current loss to be high, so that power transmission is difficult and a coupler generates heat seriously.
When reducing shaft coupling stator rotor coupling area and realizing the speed governing, can make the induction rotor conducting bar increase that generates heat because the slip increases, but the coupling area reduces and can reduce the rotor and generate heat, so under the effect of these two aspects, the temperature of intelligence speed governing magnetic coupling can increase earlier along with load side rotational speed reduction and reduce afterwards to can be when 66% of rated revolution, the shaft coupling generates heat most seriously. When the slip of the coupler is reduced, the rotating speed of the motor side is increased, the motor runs under low load, and the power factor of a power grid is reduced.
Other means of regulating flow: for example, the throttle valve is forcibly blocked, so a large pressure difference is generated before and after throttling, and the pressure loss of the controlled fluid is large, that is, the pressure after throttling is reduced, and the energy-saving effect cannot be achieved. The liquid transmission throttling transmission liquid is easy to leak, overheated and inconvenient to maintain. The eddy current coupler is throttled, the efficiency of the coupler is low, and heat is serious. The frequency converter is throttled, and is with high costs, and the motor is overheated during the speed reduction, produces the harmonic, produces the axle current, damages the bearing, easily receives the lightning influence.
Disclosure of Invention
The invention aims to provide a magnetic intelligent speed regulating coupler which can replace a throttle valve, a mechanical coupler, a vortex coupler, a frequency converter and the like, realize speed regulation of a fan and a water pump according to needs, control the flow of the fan and the water pump and achieve an energy-saving effect, so as to solve at least one technical problem in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an energy-saving magnetic intelligent speed regulation coupling, which comprises:
one end of the telescopic device is connected with the magnetic rotor, and one end of the cage-shaped rotor extends into the magnetic rotor;
the telescopic device is connected with a closed-loop control system, and the telescopic state of the telescopic device is controlled by using the closed-loop control system;
the cage type rotor can relatively slide along the central shaft of the magnetic rotor and the magnetic rotor so as to change the coupling area between the cage type rotor and the magnetic rotor;
the other end of the cage-shaped rotor is connected with a rotating shaft.
Preferably, one end of the magnetic rotor is an end plate, and the telescopic device is connected with the end plate.
Preferably, the magnetic rotor is formed by mutually connecting a plurality of strip-shaped permanent magnets with arc-shaped cross sections, and the plurality of strip-shaped permanent magnets are vertically fixed on the same surface of the end plate.
Preferably, the telescopic device is a telescopic shaft.
Preferably, the closed-loop control system comprises a main control end computer, a PLC controller, a driver, and a speed sensor and a torque sensor mounted on the rotating shaft and the telescopic shaft.
Preferably, the main control end computer sends an instruction to the PLC controller according to speed and torque signals fed back by the speed sensor and the torque sensor, and the PLC controller sends a response pulse to the driver according to the instruction signal to drive the linear actuator to adjust the extension or the relaxation of the telescopic shaft.
Preferably, the cage rotor includes a rotor core, a plurality of rotor slots are uniformly formed in the rotor core, guide bars are arranged in the rotor slots, two ends of each guide bar are respectively connected with an end ring, and the end rings are arranged at two ends of the rotor core;
the rotor slots are communicated with the radial end faces of the rotor iron cores, and rotor teeth are arranged between the adjacent rotor slots.
Preferably, the strip-shaped permanent magnet is made of a rare earth permanent magnet material.
Preferably, the conducting bar is made of copper material.
Preferably, the end ring is made of copper material.
The invention has the beneficial effects that: the power transmission efficiency is high, the problem of serious heating of the coupler is relieved, the power factor reduction of a power grid caused by low-load operation of a motor is avoided, a throttling valve, a mechanical coupler, a vortex coupler, a frequency converter and the like can be replaced, the speed of a fan and a water pump can be regulated according to needs, the flow of the fan and the water pump can be controlled, and the energy-saving effect is achieved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an exploded view of an energy-saving magnetic intelligent speed regulation coupling according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of an energy-saving magnetic intelligent speed regulation coupling according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a cage rotor of the energy-saving magnetic intelligent speed regulation coupling according to the embodiment of the invention.
Fig. 4 is a schematic view of a use state of the energy-saving magnetic intelligent speed regulation coupling according to the embodiment of the invention.
Wherein: 1-a telescopic device; 2-a magnetic rotor; 3-a cage rotor; 4-a rotating shaft; 5-end plate; 6-bar permanent magnet; 7-a rotor core; 8-rotor slots; 9-conducting bars; 10-an end ring; 11-rotor teeth; 12-a torque sensor; 13-a speed sensor; 14-a linear actuator; 15-fixed station.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by way of the drawings are illustrative only and are not to be construed as limiting the invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
For the purpose of facilitating an understanding of the present invention, the present invention will be further explained by way of specific embodiments with reference to the accompanying drawings, which are not intended to limit the present invention.
It should be understood by those skilled in the art that the drawings are merely schematic representations of embodiments and that the elements shown in the drawings are not necessarily required to practice the invention.
Examples
As shown in fig. 1 to fig. 3, an embodiment of the present invention provides an energy-saving magnetic intelligent speed regulation coupling, including: one end of the telescopic device 1 is connected with the magnetic rotor 2, and one end of the cage-shaped rotor 3 extends into the magnetic rotor 2;
the telescopic device 1 is connected with a closed-loop control system, and the telescopic state of the telescopic device is controlled by the closed-loop control system;
the cage rotor 3 can relatively slide along the central axis of the magnetic rotor 2 and the magnetic rotor 2 so as to change the coupling area between the cage rotor 3 and the magnetic rotor 2;
the other end of the cage-shaped rotor 3 is connected with a rotating shaft 4.
One end of the magnetic rotor 2 is an end plate 5, and the telescopic device 1 is connected with the end plate 5.
The magnetic rotor 2 is formed by mutually connecting and enclosing a plurality of strip-shaped permanent magnets 6 with arc-shaped cross sections, and the strip-shaped permanent magnets 6 are vertically fixed on the same surface of the end plate 5.
The telescopic device 1 is a telescopic shaft.
The cage type rotor 3 comprises a rotor core 7, a plurality of rotor slots 8 are uniformly formed in the rotor core 7, guide bars 9 are arranged in the rotor slots 8, two ends of each guide bar 9 are respectively connected with an end ring 10, and the end rings 10 are arranged at two ends of the rotor core 7. The rotor slots 8 are communicated with the radial end faces of the rotor iron cores 7, and rotor teeth 11 are arranged between the adjacent rotor slots 8.
The intelligent speed regulation coupling provided by the embodiment of the invention comprises the following structures:
(1) a rotor core: the material and specification of the induction motor rotor are basically the same, the magnetic conduction function is achieved, and the size of the groove is matched with the shape and size of the conducting bar.
(2) An end ring: mainly plays a role in diversion, so the requirement on the conductivity of the material is higher, and the material is generally made of copper.
(3) Conducting strip: the use of copper conductors is based primarily on two considerations: efficiency and reliability. Therefore, the magnetic couplings using copper bars are all medium-large-sized couplings. The copper conducting bar is made of a material mainly considering the influence of resistance on the performance of the motor. Pure copper has small resistivity, so the efficiency is high; but the starting torque and overload capability are slightly poor. The cast aluminum conductors have a somewhat lower efficiency with higher resistance but higher starting torque and overload capacity. Compared with a cast aluminum conducting bar, the fault rate of the copper conducting bar is lower; the current density and the overcurrent capacity of the high-voltage switch are both greatly improved. Almost fault-free operation of the coupling can be achieved.
The shape of the bar also has some effect on the coupling, e.g. round bars have a higher efficiency but a lower starting torque. The trapezoidal conducting bar has high starting torque but low efficiency. The performance of the round and trapezoidal double-layer conducting bar is between the round and trapezoidal double-layer conducting bars.
(4) A magnetic rotor: the permanent magnet consists of permanent magnets (namely strip permanent magnets) with N poles and S poles arranged in sequence. Because the rare earth permanent magnetic material has excellent magnetic performance, the rare earth permanent magnetic material can establish a strong permanent magnetic field without external energy after being magnetized, and the rare earth permanent magnetic material is used for replacing a magnetic coupling made of a traditional electric excitation field, has high efficiency, simple structure and reliable operation, can also achieve small volume and light weight, and can achieve the high performance which cannot be compared with the traditional electric excitation coupling.
(5) A telescopic shaft: and a mechanical mechanism which can adjust the extension of the rotor on line is matched and used for adjusting the coupling area of the magnetic rotor and the squirrel cage rotor so as to achieve the effect of speed regulation. In summary, the embodiments of the present invention are described.
As shown in fig. 4, one end of the coupler is connected with a load, the other end is connected with a motor, the motor is installed on a fixed table 15, and the closed-loop control system comprises a main control end computer, a PLC controller, a driver, a rotating shaft 4, a speed sensor 13 and a torque sensor 12 which are installed on the telescopic shaft.
After the motor rotates, the speed sensor 13 and the torque sensor 12 acquire speed information and torque information in real time, the main control end computer sends an instruction to the PLC according to speed and torque signals fed back by the speed sensor 13 and the torque sensor 12, the PLC sends a response pulse according to the instruction signal to the driver to drive the linear actuator 14 to adjust the stretching or the relaxation of the stretching shaft, so that the coupling area of the squirrel cage rotor and the excitation rotor is controlled, and the purposes of speed regulation and energy conservation are achieved.
In conclusion, the energy-saving magnetic intelligent speed regulation coupler provided by the embodiment of the invention has high power transmission efficiency, relieves the problem of serious heating of the coupler, avoids the reduction of power factor of a power grid caused by low-load operation of a motor, can replace a throttle valve, a mechanical coupler, an eddy current coupler, a frequency converter and the like, realizes speed regulation of a fan and a water pump according to needs, controls the flow of the fan and the water pump, and achieves an energy-saving effect.
Those of ordinary skill in the art will understand that: the components in the device in the embodiment of the present invention may be distributed in the device in the embodiment according to the description of the embodiment, or may be correspondingly changed in one or more devices different from the embodiment. The components of the above embodiments may be combined into one component, or may be further divided into a plurality of sub-components.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an energy-saving magnetism intelligence speed governing shaft coupling which characterized in that includes:
one end of the telescopic device (1) is connected with the magnetic rotor (2), and one end of the cage-shaped rotor (3) extends into the magnetic rotor (2);
the telescopic device (1) is connected with a closed-loop control system, and the telescopic state of the telescopic device is controlled by the closed-loop control system;
the cage-type rotor (3) can relatively slide along the central shaft of the magnetic rotor (2) and the magnetic rotor (2) so as to change the coupling area between the cage-type rotor (3) and the magnetic rotor (2);
the other end of the cage-shaped rotor (3) is connected with a rotating shaft (4).
2. The energy-saving magnetic intelligent speed regulation coupling of claim 1, characterized in that one end of the magnetic rotor (2) is an end plate (5), and the telescoping device (1) is connected with the end plate (5).
3. An energy-saving magnetic intelligent speed regulation coupling according to claim 2, characterized in that the magnetic rotor (2) is formed by mutually connecting and enclosing a plurality of permanent bar magnets (6) with arc-shaped cross sections, and the plurality of permanent bar magnets (6) are vertically fixed on the same surface of the end plate (5).
4. An energy-saving intelligent speed regulation coupling according to claim 1, characterized in that the telescoping device (1) is a telescopic shaft.
5. The energy-saving intelligent speed regulation coupling of claim 4, characterized in that the closed-loop control system comprises a main control computer, a PLC controller, a driver, and a speed sensor (13) and a torque sensor (12) installed on the rotating shaft (4) and the telescopic shaft.
6. The energy-saving intelligent speed regulation coupling of claim 5, characterized in that, the computer of the main control end sends out instructions to the PLC controller according to the speed and torque signals fed back by the speed sensor (13) and the torque sensor (12), and the PLC controller sends out responding pulses according to the instruction signals and sends the pulses to the driver to drive the linear actuator (14) to adjust the extension or the relaxation of the telescopic shaft.
7. The energy-saving intelligent speed regulation coupling according to any one of claims 1 to 6, characterized in that the cage rotor (3) comprises a rotor core (7), a plurality of rotor slots (8) are uniformly arranged on the rotor core (7), a conducting bar (9) is arranged in each rotor slot (8), two ends of each conducting bar (9) are respectively connected with an end ring (10), and the end rings (10) are arranged at two ends of the rotor core (7); the rotor slots (8) are communicated with the radial end faces of the rotor iron cores (7), and rotor teeth (11) are arranged between the adjacent rotor slots (8).
8. An energy-saving magnetic intelligent speed regulation coupling according to claim 7, characterized in that the bar permanent magnets (6) are made of rare earth permanent magnet material.
9. The energy-saving intelligent speed regulation coupling of claim 8, wherein the conducting bars are made of copper material.
10. The energy efficient intelligent speed regulation coupling of claim 9, wherein the end ring is made of a copper material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079094.5A CN110808676A (en) | 2019-11-07 | 2019-11-07 | Energy-saving magnetic intelligent speed regulation coupling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911079094.5A CN110808676A (en) | 2019-11-07 | 2019-11-07 | Energy-saving magnetic intelligent speed regulation coupling |
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| CN110808676A true CN110808676A (en) | 2020-02-18 |
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| CN201911079094.5A Pending CN110808676A (en) | 2019-11-07 | 2019-11-07 | Energy-saving magnetic intelligent speed regulation coupling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245195A (en) * | 2020-03-03 | 2020-06-05 | 东南大学 | Brushless power feedback type permanent magnet speed regulator with squirrel cage conductor rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3683249A (en) * | 1969-09-27 | 1972-08-08 | Fukuo Shibata | Electric machine arrangement combining electromagnetic coupling with electric rotating machine |
| CN103401398A (en) * | 2013-08-06 | 2013-11-20 | 大连交通大学 | Magnetic coupler |
| CN106130075A (en) * | 2016-08-17 | 2016-11-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupled speed-regulating wind group of motors and control method thereof |
| CN109341913A (en) * | 2018-10-30 | 2019-02-15 | 中国科学院电工研究所 | A kind of torque measuring device |
| CN110044611A (en) * | 2019-04-25 | 2019-07-23 | 江苏利得尔电机有限公司 | A kind of electromagnetic type shaft coupling combination property test desk and its test method |
-
2019
- 2019-11-07 CN CN201911079094.5A patent/CN110808676A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3683249A (en) * | 1969-09-27 | 1972-08-08 | Fukuo Shibata | Electric machine arrangement combining electromagnetic coupling with electric rotating machine |
| CN103401398A (en) * | 2013-08-06 | 2013-11-20 | 大连交通大学 | Magnetic coupler |
| CN106130075A (en) * | 2016-08-17 | 2016-11-16 | 青岛大学 | A kind of self-styled closed form electromagnetic coupled speed-regulating wind group of motors and control method thereof |
| CN109341913A (en) * | 2018-10-30 | 2019-02-15 | 中国科学院电工研究所 | A kind of torque measuring device |
| CN110044611A (en) * | 2019-04-25 | 2019-07-23 | 江苏利得尔电机有限公司 | A kind of electromagnetic type shaft coupling combination property test desk and its test method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245195A (en) * | 2020-03-03 | 2020-06-05 | 东南大学 | Brushless power feedback type permanent magnet speed regulator with squirrel cage conductor rotor |
| CN111245195B (en) * | 2020-03-03 | 2021-11-02 | 东南大学 | Brushless power feedback type permanent magnet speed regulator with squirrel cage conductor rotor |
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Application publication date: 20200218 |
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