CN110880828B - Moment motor capable of monitoring rotating speed and compensating output - Google Patents
Moment motor capable of monitoring rotating speed and compensating output Download PDFInfo
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- CN110880828B CN110880828B CN201911304658.0A CN201911304658A CN110880828B CN 110880828 B CN110880828 B CN 110880828B CN 201911304658 A CN201911304658 A CN 201911304658A CN 110880828 B CN110880828 B CN 110880828B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 52
- 230000005284 excitation Effects 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007812 deficiency Effects 0.000 abstract 1
- 239000013589 supplement Substances 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
- H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/26—Devices for sensing voltage, or actuated thereby, e.g. overvoltage protection devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K26/00—Machines adapted to function as torque motors, i.e. to exert a torque when stalled
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
- H02K7/1023—Magnetically influenced friction brakes using electromagnets
- H02K7/1025—Magnetically influenced friction brakes using electromagnets using axial electromagnets with generally annular air gap
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a torque motor capable of monitoring rotating speed and compensating output, which comprises a shell, a transmission shaft, a torque output structure, a rotating speed monitoring structure and an emergency braking structure, wherein the shell is arranged on the transmission shaft; the front end of the shell is provided with a first accommodating groove, the rear end of the shell is provided with a second accommodating groove, and the moment output structure and the rotating speed monitoring structure are respectively arranged in the first accommodating groove and the second accommodating groove; the emergency braking structure comprises an excitation coil, an armature, a friction disc and a friction plate assembly; the armature is located the inboard of rear end cap, the friction disc is located between rotational speed monitoring structure and the armature, the friction disc subassembly is located between armature and the friction disc, and it includes friction ring and connection diaphragm. The invention can monitor the torque output rotating speed in real time in the torque output structure, can carry out emergency braking on the torque output structure under emergency, can supplement the output torque deficiency of the torque motor and improve the adaptability of the torque motor.
Description
Technical Field
The invention relates to the technical field of torque motors, in particular to a torque motor capable of monitoring rotating speed and compensating output.
Background
The torque motor is a special motor with soft mechanical property and wide speed regulation range; the shaft of the motor outputs power not with constant power but with constant torque; the device is divided into a direct current torque output device and an alternating current torque output structure. The torque is generated by driving the transmission shaft by utilizing the principle that an electrified coil generates ampere force in a magnetic field, and the rotation speed is detected by utilizing the principle that the coil moves in the magnetic field to generate current so as to detect the output voltage, thereby detecting the instantaneous output rotation speed of the motor. The moment output structure is widely applied to a plurality of mechanical equipment and position control devices, for example, a high-precision stable platform, a speed turntable, a printing and dyeing equipment transmission part and the like all need to adopt a moment motor to carry out motion output.
In the prior art, the moment output structure mainly adopts a combination of a moment motor and an encoder or a moment motor and a speed measuring motor to control the movement position in a combined way, and the two control modes are position or speed control, so that the motor cannot be braked under an emergency condition. If the tail end of the system fails in the working process of the moment motor, the moment motor cannot be directly braked in an emergency mode, and the internal structure of the moment motor or a transmission device between the moment motor and the tail end can be damaged mainly by adopting tail end braking. Meanwhile, the rated output torque of the traditional torque output structure is mostly fixed, and after the upper limit is reached, only larger torque cannot be further output.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to solve the problems that in the prior art, a torque output structure cannot brake a motor under an emergency condition, the torque output rotating speed cannot be monitored in real time in the torque output structure, and the maximum output torque of the torque motor is fixed.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a torque motor capable of monitoring rotational speed and compensating output, characterized in that: the device comprises a shell, a transmission shaft, a torque output structure, a rotating speed monitoring structure and an emergency braking structure;
The shell is cylindrical, the middle part of the shell is provided with shaft holes penetrating through the two ends of the shell, the front end of the shell is connected with the front end cover, and the rear end of the shell is connected with the rear end cover; the rear end of the transmission shaft passes through the front end cover and the shaft hole and is rotationally connected with the shell through a bearing; the front end of the shell is provided with a first accommodating groove around the front end of the shell, the rear end of the shell is provided with a second accommodating groove around the front end of the shell, and the moment output structure and the rotating speed monitoring structure are respectively arranged in the first accommodating groove and the second accommodating groove;
The torque output structure comprises a torque motor stator and a torque motor rotor, wherein the outer side of the torque motor stator is tightly attached to the side wall of the first accommodating groove and is fixedly connected with the shell; the torque motor rotor is positioned at the inner side of the torque motor stator, the inner side of the torque motor rotor is fixedly connected with the transmission shaft through the first rotor bracket, and the transmission shaft can synchronously rotate along with the torque motor rotor; the rotating speed monitoring structure comprises a speed measuring motor stator and a speed measuring motor rotor, wherein the outer side of the speed measuring motor stator is clung to the side wall of the second accommodating groove and is fixedly connected with the shell; the speed measuring motor rotor is positioned at the inner side of the speed measuring motor stator, the inner side of the speed measuring motor rotor is fixedly connected with the transmission shaft through the second rotor bracket, and the transmission shaft can drive the speed measuring motor rotor to synchronously rotate;
The emergency braking structure comprises an excitation coil, an armature, a friction disc and a friction plate assembly; a coil groove which is wound around the inner side of the rear end cover is formed in the inner side of the rear end cover, and the exciting coil is arranged in the coil groove; the armature is positioned at the inner side of the rear end cover, a plurality of spring grooves are distributed around the periphery of the outer side of the coil groove, a reset spring is arranged in the spring groove, one end of the reset spring is fixedly connected with the bottom of the spring groove, and the other end of the reset spring is fixedly connected with the armature; the friction disc is positioned between the rotating speed monitoring structure and the armature and is fixedly connected with the second rotor bracket; the friction plate assembly is positioned between the armature and the friction plate and comprises a friction ring and a connecting diaphragm; the connecting diaphragm is an elastic sheet, the middle part of the connecting diaphragm is fixedly connected with the second rotor, the inner side of the friction ring is fixedly connected with the outer side of the connecting diaphragm, and gaps are reserved among the friction ring, the armature and the friction disc; in the initial state, the exciting coil is electrified to enable the armature iron to be clung to the rear end cover, and after the exciting coil is powered off, the armature iron moves towards the direction of the friction disc under the action of the reset spring and can compress the friction plate assembly and the friction ring.
Further, the speed measuring motor also comprises a power supply device and a voltmeter, wherein two ends of the speed measuring motor rotor are connected with two ends of the power supply device, and a control switch is connected in series between the speed measuring motor rotor and the power supply device; the voltmeter is connected with the speed measuring motor rotor in parallel.
Further, the first rotor support and the second rotor support comprise an inner cylinder, an outer cylinder and a connecting plate for connecting the inner cylinder and the outer cylinder; the inner cylinders of the first rotor bracket and the second rotor bracket are sleeved on the transmission shaft and are connected with the transmission shaft through splines; the torque motor rotor is sleeved on the outer cylinder of the first rotor bracket, and the speed measuring motor rotor is sleeved on the outer cylinder of the second rotor bracket; wherein the rear end of the second rotor support extends to the outer side of the rear end of the transmission shaft.
Further, a bearing is respectively arranged between the transmission shaft and the two ends of the shell, wherein the rear end of the inner cylinder of the first rotor bracket is clung to the bearing, and the front end is locked and positioned by a check ring; the front end of the inner cylinder of the second rotor bracket is also clung to the bearing, and the rear end is pressed and fixed by a pressing plate fixed with the rear end of the transmission shaft.
Further, the inner side of the connecting diaphragm is fixedly pressed on the second rotor bracket through an inner pressing ring, and the outer side of the connecting diaphragm is fixedly pressed on the friction ring through an outer pressing ring; a friction plate which winds the friction ring around is fixed on two sides of the friction ring respectively.
Compared with the prior art, the invention has the following advantages:
1. the front end of the whole motor is a torque motor, the rear end of the whole motor is a speed measuring motor, the axial positioning of the whole motor is prolonged, the positioning precision of the transmission shaft is improved, the jumping of the transmission shaft can be reduced, and the stability of the transmission is improved.
2. When the speed measuring motor is not electrified, the rotating speed of the transmission shaft can be monitored in real time by monitoring the real-time output voltage of the speed measuring motor.
3. In an emergency, the power supply of the exciting coil is disconnected, so that the armature is pushed by the reset spring, the moment motor is braked emergently, and the moment motor, the transmission part and the movement tail end are protected.
4. When the torque motor can not drive a load, the output voltage of the speed measuring motor is zero, at the moment, the rotor of the speed measuring motor can be powered, the working mode of the speed measuring motor is changed, and the output voltage is changed into input current, so that the speed measuring motor is changed into the torque motor, the output torque of the whole torque motor is increased, overload work is performed in a short time, and the strain capacity of the torque motor is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: 1-shell, 2-transmission shaft, 3-front end cover, 4-rear end cover, 5-torque motor stator, 6-torque motor rotor, 7-first rotor support, 8-speed motor stator, 9-speed motor rotor, 10-second rotor support, 11-exciting coil, 12-armature, 13-friction disc, 14-return spring, 15-friction ring, 16-connection diaphragm, 17-retainer ring, 18-pressing plate, 19-inner pressing ring, 20-outer pressing ring and 21-friction plate.
Detailed Description
The invention will be further described with reference to the drawings and examples.
Examples: referring to fig. 1 and 2, a torque motor capable of monitoring rotation speed and compensating output includes a housing 1 (motor base), a transmission shaft 2, a torque output structure, a rotation speed monitoring structure, and an emergency braking structure.
The shell 1 is cylindrical, the middle part of the shell is provided with shaft holes penetrating through two ends of the shell, the front end of the shell 1 is connected with the front end cover 3, and the rear end of the shell is connected with the rear end cover 4; the rear end of the transmission shaft 2 passes through the front end cover 3 and the shaft hole and is rotationally connected with the shell 1 through a bearing; in specific implementation, the two ends of the transmission shaft 2 close to the shaft hole are respectively connected with the shell 1 through bearings, so that the rotation stability of the transmission shaft 2 can be ensured. The front end of the shell 1 is provided with a first accommodating groove around the front end, the rear end of the shell 1 is provided with a second accommodating groove around the front end, and the moment output structure and the rotating speed monitoring structure are respectively arranged in the first accommodating groove and the second accommodating groove.
The torque output structure comprises a torque motor stator 5 and a torque motor rotor 6, wherein the outer side of the torque motor stator 5 is tightly attached to the side wall of the first accommodating groove and is fixedly connected with the shell 1. The torque motor rotor 6 is located at the inner side of the torque motor stator 5, the inner side of the torque motor rotor 6 is fixedly connected with the transmission shaft 2 through the first rotor support 7, and the transmission shaft 2 can synchronously rotate along with the torque motor rotor 6. The rotating speed monitoring structure comprises a speed measuring motor stator 8 and a speed measuring motor rotor 9, wherein the outer side of the speed measuring motor stator 8 is clung to the side wall of the second accommodating groove and is fixedly connected with the shell 1. The speed measuring motor rotor 9 is located at the inner side of the speed measuring motor stator 8, the inner side of the speed measuring motor rotor 9 is fixedly connected with the transmission shaft 2 through the second rotor support 10, and the transmission shaft 2 can drive the speed measuring motor rotor 9 to synchronously rotate. The moment motor stator 5 and the speed measuring motor stator 8 are formed by winding permanent magnets in even numbers, and the polarities of two adjacent permanent magnets are opposite; the torque motor rotor 6 and the speed measuring motor rotor 9 are both composed of a coil support and a coil winding which is wound on the coil support, and the coil support is correspondingly and fixedly connected with the first rotor support 7 and the second rotor support 10. In the specific implementation, the first rotor bracket 7 and the second rotor bracket 10 both comprise an inner cylinder, an outer cylinder and a connecting plate for connecting the inner cylinder and the outer cylinder; and a yielding groove is formed in the inner side of the rear end cover 4 and corresponds to the transmission shaft 2 and the second rotor bracket 10. Wherein, the inner cylinders of the first rotor bracket 7 and the second rotor bracket 10 are sleeved on the transmission shaft 2 and are connected with the transmission shaft 2 through splines. The torque motor rotor 6 is sleeved on the outer cylinder of the first rotor bracket 7, and the speed measuring motor rotor 9 is sleeved on the outer cylinder of the second rotor bracket 10; wherein the rear end of the second rotor support 10 extends to the outside of the rear end of the drive shaft 2; the whole structure is simpler, and the processing and the manufacturing are more convenient. The rear end of the inner cylinder of the first rotor bracket 7 is tightly attached to the bearing, the front end of the inner cylinder is locked and positioned by a check ring 17, and the check ring 17 is in threaded fit connection with the transmission shaft 2; the front end of the inner cylinder of the second rotor bracket 10 is also clung to the bearing, the rear end is pressed and fixed by a pressing plate 18 fixed with the rear end of the transmission shaft 2, and the pressing plate 18 is connected with the rear end of the transmission shaft 2 through a bolt; in this way, the first rotor holder 7 and the second rotor holder 10 can be effectively positioned, and the overall stability can be effectively improved.
In this scheme, whole motor front end is moment motor, and the rear end is the motor that tests the speed, and like this, the axial positioning of whole motor becomes longer, and the positioning accuracy of transmission shaft 2 improves, can reduce the beat of transmission shaft 2, promotes driven stationarity. When the speed measuring motor is not electrified, the rotating speed of the transmission shaft 2 can be monitored in real time by monitoring the real-time output voltage of the speed measuring motor. When the torque motor cannot drive a load, the output voltage of the speed measuring motor is zero, at the moment, the power can be supplied to the rotor 9 of the speed measuring motor, the working mode of the speed measuring motor is changed, and the output voltage is changed into input current, so that the speed measuring motor is changed into the torque motor, the output torque of the whole torque motor is increased, overload work is performed in a short time, and the strain capacity of the torque motor is improved.
The emergency braking structure comprises an exciting coil 11, an armature 12, a friction disc 13 and a friction plate assembly. A coil groove around which the exciting coil 11 is arranged is formed on the inner side of the rear end cover 4; the armature 12 is positioned on the inner side of the rear end cover 4; in this way, the rear cover 4 and the exciting coil 11 have an electromagnet structure, and when the exciting coil 11 is energized, the armature 12 can be attracted to the rear cover 4, thereby bringing the armature 12 into close contact with the rear cover 4. A plurality of spring grooves are distributed around the periphery of the coil groove outside the coil groove, a return spring 14 is arranged in the spring groove, one end of the return spring 14 is fixedly connected with the bottom of the spring groove, and the other end of the return spring 14 is fixedly connected with the armature 12. The friction disk 13 is positioned between the rotating speed monitoring structure and the armature 12 and is fixedly connected with the second rotor bracket 10; in specific implementation, the friction disk 13 is annular, sleeved on the outer cylinder of the second rotor bracket 10 and connected with the outer cylinder through a spline. The friction plate assembly is positioned between the armature 12 and the friction disk 13 and comprises a friction ring 15 and a connecting diaphragm 16; the connecting diaphragm 16 is an elastic sheet with a certain rigidity, such as a thin steel plate, and the middle part of the connecting diaphragm is fixedly connected with the second rotor, the inner side of the friction ring 15 is fixedly connected with the outer side of the connecting diaphragm 16, and gaps are formed between the friction ring 15 and the armature 12 and between the friction ring 15 and the friction disc 13. In specific implementation, the inner side of the connecting diaphragm 16 is fixed on the second rotor bracket 10 through an inner pressing ring 19 in a pressing manner, and the outer side of the connecting diaphragm is fixed on the friction ring 15 through an outer pressing ring 20 in a pressing manner; in this way, the installation stability of the entire friction pack is better. Friction plates 21 are fixed to both sides of the friction ring 15 around the friction ring 15, respectively, so that the friction effect and the friction torque can be improved. In the initial state, the exciting coil 11 is electrified to enable the armature 12 and the rear end cover 4 to be clung together; after the exciting coil 11 is powered off, under the action of the return spring 14, the armature 12 moves towards the friction disc 13 and can overcome the elastic force of the connecting diaphragm 16 to compress the friction disc assembly and the friction ring 15 so as to brake the transmission shaft 2; when the exciting coil 11 is electrified again, the armature 12 moves towards the rear end cover 4 under the action of the magnetic force generated by the exciting coil 11 until the armature is tightly attached to the rear end cover 4, at the moment, the connecting diaphragm 16 is restored to the original state due to the disappearance of the received pressure, and the friction ring 15 is driven to be separated from the friction disc 13, so that braking is not performed any more. In the scheme, in an emergency, the power supply of the exciting coil 11 can be disconnected, so that the armature 12 is pushed by the reset spring 14, the moment motor is braked emergently, and the moment motor, the transmission part and the movement tail end are protected.
In the specific implementation process, the front end of the torque motor stator 5 is fixed with a brush frame assembly, carbon brushes on the brush frame assembly are contacted with a picture changing picture on the torque motor rotor 6, and outgoing lines of the carbon brushes are led out of the motor through threading holes on the shell 1 and are connected with an external power supply. The external power supply enables the winding coil of the rotor 6 of the torque motor to be electrified with direct current through the carbon brush, and the current generates ampere force in the magnetic field provided by the stator assembly, so that the torque motor moves, and torque is output through the transmission shaft 2. Correspondingly, the rear end of the speed measuring motor stator 8 is also provided with a brush frame assembly, a carbon brush on the brush frame assembly is contacted with a picture changing piece on the speed measuring motor rotor 9, and an outgoing line of the carbon brush is led out of the motor through a threading hole on the shell 1; the speed measuring motor rotor 9 rotates under the drive of the torque motor, a winding coil of the speed measuring motor rotor 9 moves in a magnetic field provided by the speed measuring motor stator 8, induced current is generated, and the current is transmitted to the outside of the motor through an outgoing line of the carbon brush for detection. When the torque provided by the torque motor is insufficient, the outgoing line of the carbon brush is connected with an external power supply, so that direct current is conducted on the rotor 9 of the speed measuring motor, and the speed measuring motor is changed into the torque motor; the coil of the rotor 9 of the tachometer motor generates an ampere force to increase the output torque of the whole torque motor. The two ends of the exciting coil 11 on the rear cover 4 are led out from the threading holes formed in the rear cover 4 and then connected to an external power supply.
In this scheme, still include voltmeter and power supply unit. The voltmeter is connected with the tachometer motor rotor 9 in parallel; like this, can monitor the output voltage of speed measuring motor in real time to monitor the rotational speed of whole motor. The two ends of the speed measuring motor rotor 9 are connected with the two ends of the power supply device, and a control switch is connected in series between the speed measuring motor rotor 9 and the power supply device; therefore, the power supply to the tachometer motor rotor 9 can be realized, so that the working mode of the tachometer motor is changed, and in the operation process, the tachometer motor rotor can be controlled manually or automatically after receiving the voltage signal of the voltmeter through the controller.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.
Claims (3)
1. A torque motor capable of monitoring rotational speed and compensating output, characterized in that: the device comprises a shell, a transmission shaft, a torque output structure, a rotating speed monitoring structure and an emergency braking structure;
The shell is cylindrical, the middle part of the shell is provided with shaft holes penetrating through the two ends of the shell, the front end of the shell is connected with the front end cover, and the rear end of the shell is connected with the rear end cover; the rear end of the transmission shaft passes through the front end cover and the shaft hole and is rotationally connected with the shell through a bearing; the front end of the shell is provided with a first accommodating groove around the front end of the shell, the rear end of the shell is provided with a second accommodating groove around the front end of the shell, and the moment output structure and the rotating speed monitoring structure are respectively arranged in the first accommodating groove and the second accommodating groove;
The torque output structure comprises a torque motor stator and a torque motor rotor, wherein the outer side of the torque motor stator is tightly attached to the side wall of the first accommodating groove and is fixedly connected with the shell; the torque motor rotor is positioned at the inner side of the torque motor stator, the inner side of the torque motor rotor is fixedly connected with the transmission shaft through the first rotor bracket, and the transmission shaft can synchronously rotate along with the torque motor rotor; the rotating speed monitoring structure comprises a speed measuring motor stator and a speed measuring motor rotor, wherein the outer side of the speed measuring motor stator is clung to the side wall of the second accommodating groove and is fixedly connected with the shell; the speed measuring motor rotor is positioned at the inner side of the speed measuring motor stator, the inner side of the speed measuring motor rotor is fixedly connected with the transmission shaft through the second rotor bracket, and the transmission shaft can drive the speed measuring motor rotor to synchronously rotate;
The emergency braking structure comprises an excitation coil, an armature, a friction disc and a friction plate assembly; a coil groove which is wound around the inner side of the rear end cover is formed in the inner side of the rear end cover, and the exciting coil is arranged in the coil groove; the armature is positioned at the inner side of the rear end cover, a plurality of spring grooves are distributed around the periphery of the outer side of the coil groove, a reset spring is arranged in the spring groove, one end of the reset spring is fixedly connected with the bottom of the spring groove, and the other end of the reset spring is fixedly connected with the armature; the friction disc is positioned between the rotating speed monitoring structure and the armature and is fixedly connected with the second rotor bracket; the friction plate assembly is positioned between the armature and the friction plate and comprises a friction ring and a connecting diaphragm; the connecting diaphragm is an elastic sheet, the middle part of the connecting diaphragm is fixedly connected with the second rotor, the inner side of the friction ring is fixedly connected with the outer side of the connecting diaphragm, and gaps are reserved among the friction ring, the armature and the friction disc; in the initial state, the exciting coil is electrified to enable the armature iron to be clung to the rear end cover, and after the exciting coil is powered off, the armature iron moves towards the direction of the friction disc under the action of the reset spring and can compress the friction plate assembly and the friction ring;
The first rotor support and the second rotor support comprise an inner cylinder, an outer cylinder and a connecting plate for connecting the inner cylinder and the outer cylinder; the inner cylinders of the first rotor bracket and the second rotor bracket are sleeved on the transmission shaft and are connected with the transmission shaft through splines; the torque motor rotor is sleeved on the outer cylinder of the first rotor bracket, and the speed measuring motor rotor is sleeved on the outer cylinder of the second rotor bracket; wherein the rear end of the second rotor bracket extends to the outer side of the rear end of the transmission shaft;
The inner side of the connecting diaphragm is fixed on the second rotor bracket through an inner pressing ring in a pressing manner, and the outer side of the connecting diaphragm is fixed on the friction ring through an outer pressing ring in a pressing manner; a friction plate which winds the friction ring around is fixed on two sides of the friction ring respectively.
2. A torque motor capable of monitoring rotational speed and compensating output as claimed in claim 1, wherein: the speed measuring motor comprises a speed measuring motor rotor, a power supply device, a voltmeter, a control switch and a control switch, wherein the two ends of the speed measuring motor rotor are connected with the two ends of the power supply device; the voltmeter is connected with the speed measuring motor rotor in parallel.
3. A torque motor capable of monitoring rotational speed and compensating output as claimed in claim 1, wherein: a bearing is respectively arranged between the transmission shaft and two ends of the shell, wherein the rear end of the inner cylinder of the first rotor bracket is clung to the bearing, and the front end is locked and positioned by a check ring; the front end of the inner cylinder of the second rotor bracket is also clung to the bearing, and the rear end is pressed and fixed by a pressing plate fixed with the rear end of the transmission shaft.
Priority Applications (1)
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| CN201911304658.0A CN110880828B (en) | 2019-12-17 | 2019-12-17 | Moment motor capable of monitoring rotating speed and compensating output |
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| CN110880828A (en) | 2020-03-13 |
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