CN110880828A - Torque motor capable of monitoring rotating speed and compensating output - Google Patents
Torque motor capable of monitoring rotating speed and compensating output Download PDFInfo
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- CN110880828A CN110880828A CN201911304658.0A CN201911304658A CN110880828A CN 110880828 A CN110880828 A CN 110880828A CN 201911304658 A CN201911304658 A CN 201911304658A CN 110880828 A CN110880828 A CN 110880828A
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- 238000003825 pressing Methods 0.000 claims description 4
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- 230000033001 locomotion Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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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
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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
-
- 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 provided with a first end and a second end; 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 torque 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 on the inner side of the rear end cover, the friction disc is located between the rotating speed monitoring structure and the armature, and the friction disc assembly is located between the armature and the friction disc and comprises a friction ring and a connecting diaphragm. The torque output structure can monitor the torque output rotating speed in real time, can perform emergency braking on the torque output structure in an emergency, can supplement the insufficient output torque of the torque motor, and improves 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 characteristics and wide speed regulation range; the shaft of the motor outputs power not at constant power but at constant torque; the device is divided into a direct current torque output device and an alternating current torque output structure. The moment is generated by driving the transmission shaft by utilizing the principle that an electrified coil generates ampere force in a magnetic field, and the rotating speed is detected by detecting the height of output voltage by utilizing the principle that the coil moves in the magnetic field to generate current, so that the instant output rotating speed of the motor is detected. The torque output structure is widely applied to a plurality of mechanical devices and position control devices, for example, a high-precision stable platform, a speed turntable, a printing and dyeing device transmission part and the like all need to adopt a torque motor to carry out motion output.
In the prior art, a torque output structure mainly adopts a combination of a torque motor and an encoder or a torque motor and a speed measuring motor to jointly control the movement position, and the two control modes are position or speed control and cannot brake the motor in an emergency. If the tail end of the system fails in the working process of the torque motor, the emergency braking of the torque motor cannot be directly carried out, and the tail end braking is mainly adopted, so that the internal structure of the torque motor or a transmission device between the torque motor and the tail end can be damaged. Meanwhile, the rated output torque of the traditional torque output structure is mostly fixed, and after the upper limit is reached, larger torque can not be further output.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to solve the problems that the torque output structure cannot brake the motor in an emergency, 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 the prior art, and provides the torque motor capable of monitoring the rotating speed and compensating the output.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: the utility model provides a can monitor rotational speed and compensation output's torque motor which characterized in that: the emergency braking 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 a shaft hole 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 penetrates through the front end cover and the shaft hole and is rotatably connected with the shell through a bearing; the front end of the shell is provided with a first accommodating groove which surrounds the shell by a circle, the rear end of the shell is provided with a second accommodating groove which surrounds the shell by a circle, and the torque 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, and the outer side of the torque motor stator is tightly attached to the side wall of the first accommodating groove and fixedly connected with the shell; the torque motor rotor is positioned on 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 tightly attached to the side wall of the second accommodating groove and is fixedly connected with the shell; the speed measuring motor rotor is positioned on 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 is formed in the inner side of the rear end cover and surrounds the rear end cover, and the excitation coil is installed in the coil groove; the armature is positioned on the inner side of the rear end cover, a plurality of spring grooves are distributed around the outer side of the coil groove, a return spring is installed in each spring groove, one end of each return spring is fixedly connected with the bottom of each spring groove, and the other end of each return 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 support; 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 formed among the friction ring, the armature and the friction disc; in the initial state, the excitation coil is electrified to enable the armature iron and the rear end cover to be tightly attached together, and after the excitation coil is powered off, the armature iron moves towards the friction disc direction under the action of the return spring and can tightly press the friction disc assembly and the friction ring.
The speed measuring motor further comprises a power supply device and a voltmeter, two ends of the speed measuring motor rotor are connected with two ends of the power supply device, and a control switch is also 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 respectively 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 support, and the speed measuring motor rotor is sleeved on the outer cylinder of the second rotor support; wherein the rear end of the second rotor support extends to the outside of the rear end of the transmission shaft.
Furthermore, 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 tightly attached to the bearing, and the front end of the inner cylinder of the first rotor bracket is locked and positioned by a retaining ring; the front end of the inner cylinder of the second rotor support is also tightly attached to the bearing, and the rear end of the inner cylinder of the second rotor support is pressed and fixed by a pressing plate fixed to the rear end of the transmission shaft.
Furthermore, the inner side of the connecting diaphragm is tightly pressed and fixed on the second rotor bracket through an inner pressure ring, and the outer side of the connecting diaphragm is tightly pressed and fixed on the friction ring through an outer pressure ring; and two friction plates surrounding the friction ring are respectively fixed on two sides of the friction ring.
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 lengthened, the positioning precision of the transmission shaft is improved, the bounce of the transmission shaft can be reduced, and the transmission stability 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 emergency, the armature is pushed by the return spring by disconnecting the power supply of the magnet exciting coil, so that the torque motor is emergently braked, and the torque motor, the transmission part and the motion tail end are protected.
4. When the torque motor can not drive the load, the output voltage of the speed measuring motor is zero, at the moment, the speed measuring motor rotor is powered by the speed measuring motor rotor, the working mode of the speed measuring motor is changed, the output voltage is changed into the input current, the speed measuring motor is changed into the torque motor, the output torque of the whole torque motor is increased, overload work is carried out in a short time, and the strain capacity of the torque motor is improved.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
In the figure: the speed measuring device comprises a shell, a transmission shaft, a front end cover, a rear end cover, a torque motor stator, a torque motor rotor, a speed measuring motor stator, a speed measuring motor rotor, a.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Example (b): referring to fig. 1 and 2, a torque motor capable of monitoring a rotating speed and compensating an output comprises a housing 1 (a motor base), a transmission shaft 2, a torque output structure, a rotating speed monitoring structure and an emergency braking structure.
The shell 1 is cylindrical, the middle part of the shell is provided with a shaft hole 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 penetrates through the front end cover 3 and the shaft hole and is rotatably connected with the shell 1 through a bearing; during the concrete implementation, transmission shaft 2 is close to shaft hole both ends department and links to each other with casing 1 through the bearing respectively, like this, can guarantee transmission shaft 2's rotational stability. The front end of the shell 1 is provided with a first accommodating groove which surrounds the shell by a circle, the rear end of the shell 1 is provided with a second accommodating groove which surrounds the shell by a circle, and the torque 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 fixedly connected with the shell 1. The torque motor rotor 6 is located on 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 bracket 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 tightly attached to the side wall of the second accommodating groove and fixedly connected with the shell 1. The speed measuring motor rotor 9 is located inside 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 rotate synchronously. The torque motor stator 5 and the speed measuring motor stator 8 are both composed of an even number of wound permanent magnets, and the polarities of the two adjacent permanent magnets are opposite; the torque motor rotor 6 and the speed measuring motor rotor 9 are respectively composed of a coil support and a coil winding 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 specific implementation, the first rotor support 7 and the second rotor support 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 corresponding to the positions of the transmission shaft 2 and the second rotor support 10. The inner cylinders of the first rotor support 7 and the second rotor support 10 are sleeved on the transmission shaft 2 and are connected with the transmission shaft 2 through splines. A torque motor rotor 6 is sleeved on the outer cylinder of the first rotor bracket 7, and a 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 outer side of the rear end of the transmission shaft 2; by adopting the structure, 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 retaining ring 17, and the retaining 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 tightly attached to the bearing, the rear end of the inner cylinder is tightly pressed and fixed by a pressure plate 18 fixed with the rear end of the transmission shaft 2, and the pressure plate 18 is connected with the rear end of the transmission shaft 2 through a bolt; thus, the first rotor support 7 and the second rotor support 10 can be effectively positioned, and the overall stability is effectively improved.
In this scheme, whole motor front end is torque motor, and the rear end is speed motor, and like this, the axial positioning of whole motor is elongated, and the positioning accuracy of transmission shaft 2 improves, can reduce the beating 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 can not drive the load, the output voltage of the speed measuring motor is zero, at the moment, the speed measuring motor rotor 9 is powered by the through, the working mode of the speed measuring motor is changed, the output voltage is changed into the input current, the speed measuring motor is changed into the torque motor, the output torque of the whole torque motor is increased, overload work is carried out in a short time, and the strain capacity of the torque motor is improved.
The emergency brake structure includes an excitation coil 11, an armature 12, a friction disc 13, and a friction disc assembly. A coil groove is formed around the inner side of the rear end cover 4, and the excitation coil 11 is installed in the coil groove; the armature 12 is positioned on the inner side of the rear end cover 4; in this way, the rear end cover 4 and the excitation coil 11 form an electromagnet structure, and when the excitation coil 11 is electrified, the armature 12 can be adsorbed, so that the armature 12 is tightly attached to the rear end cover 4. A plurality of spring grooves are distributed around the outer side of the coil groove, a return spring 14 is installed in each spring groove, one end of each return spring 14 is fixedly connected with the groove bottom of each spring groove, and the other end of each return spring is fixedly connected with the armature 12. The friction disc 13 is positioned between the rotating speed monitoring structure and the armature 12 and is fixedly connected with the second rotor support 10; in specific implementation, the friction disc 13 is annular, is sleeved on the outer cylinder of the second rotor support 10, and is connected with the outer cylinder through a spline. The friction plate assembly is positioned between the armature 12 and the friction plate 13 and comprises a friction ring 15 and a connecting diaphragm 16; the connecting diaphragm 16 is an elastic sheet with 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 among the friction ring 15, the armature 12 and the friction disc 13. In specific implementation, the inner side of the connecting diaphragm 16 is pressed and fixed on the second rotor support 10 through the inner pressing ring 19, and the outer side of the connecting diaphragm is pressed and fixed on the friction ring 15 through the outer pressing ring 20; thus, the installation stability of the whole friction assembly is better. Friction plates 21 are fixed to both sides of the friction ring 15 for one rotation around the friction ring 15, respectively, so that the friction effect can be improved and the friction torque can be increased. In an initial state, the excitation coil 11 is electrified, so that the armature 12 is tightly attached to the rear end cover 4; after the exciting coil 11 is powered off, the armature 12 moves towards the friction disc 13 under the action of the return spring 14, and can overcome the elastic force of the connecting diaphragm 16 to press the friction disc assembly and the friction ring 15 tightly, so as to brake the transmission shaft 2; when the exciting coil 11 is energized again, the armature 12 moves toward the rear end cover 4 under the action of the magnetic force generated by the exciting coil 11 until the armature is closely attached to the rear end cover 4, at this time, the connecting diaphragm 16 recovers due to the loss of the pressure applied thereto, and drives the friction ring 15 to separate from the friction disc 13, so that the brake is not performed any more. This scheme, in emergency, can be through the power supply of disconnection excitation coil 11 to through reset spring 14 promotion armature 12, thus carry out emergency braking to the torque motor, protection torque motor, transmission part and motion end.
In the specific implementation process, a brush holder assembly is fixed at the front end of the torque motor stator 5, a carbon brush on the brush holder assembly is in contact with a phase change sheet on the torque motor rotor 6, and a lead-out wire of the carbon brush is led out of the motor through a threading hole in the shell 1 and is connected with an external power supply. An external power supply enables a winding coil of the torque motor rotor 6 to be electrified with direct current through the carbon brush, and the current generates ampere force in a 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 holder assembly, a carbon brush on the brush holder assembly is contacted with a phase changing sheet on the speed measuring motor rotor 9, and a leading-out wire 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 driving 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 to generate induction current, and the current is transmitted to the outside of the motor through a leading-out wire 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 to a 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 speed measuring motor generates an ampere force, and the output torque of the whole torque motor is increased. In addition, two ends of the excitation coil 11 on the rear end cover 4 are led out from a threading hole formed on the rear end cover 4 and then connected with an external power supply.
In the scheme, the device further comprises a voltmeter and a power supply device. The voltmeter is connected with the speed measuring motor rotor 9 in parallel; therefore, the output voltage of the speed measuring motor can be monitored in real time to monitor the rotating speed of the whole motor. Two ends of the speed measuring motor rotor 9 are connected with two ends of the power supply device, and a control switch is also connected in series between the speed measuring motor rotor 9 and the power supply device; like this, can realize supplying power to tacho motor rotor 9 to change tacho motor's working method, in the operation process, can control by hand, also can control automatically after the voltage signal of voltmeter is accepted through the controller.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.
Claims (5)
1. The utility model provides a can monitor rotational speed and compensation output's torque motor which characterized in that: the emergency braking 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 a shaft hole 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 penetrates through the front end cover and the shaft hole and is rotatably connected with the shell through a bearing; the front end of the shell is provided with a first accommodating groove which surrounds the shell by a circle, the rear end of the shell is provided with a second accommodating groove which surrounds the shell by a circle, and the torque 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, and the outer side of the torque motor stator is tightly attached to the side wall of the first accommodating groove and fixedly connected with the shell; the torque motor rotor is positioned on 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 tightly attached to the side wall of the second accommodating groove and is fixedly connected with the shell; the speed measuring motor rotor is positioned on 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 is formed in the inner side of the rear end cover and surrounds the rear end cover, and the excitation coil is installed in the coil groove; the armature is positioned on the inner side of the rear end cover, a plurality of spring grooves are distributed around the outer side of the coil groove, a return spring is installed in each spring groove, one end of each return spring is fixedly connected with the bottom of each spring groove, and the other end of each return 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 support; 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 formed among the friction ring, the armature and the friction disc; in the initial state, the excitation coil is electrified to enable the armature iron and the rear end cover to be tightly attached together, and after the excitation coil is powered off, the armature iron moves towards the friction disc direction under the action of the return spring and can tightly press the friction disc assembly and the friction ring.
2. A torque motor capable of monitoring rotational speed and compensating output according to claim 1, wherein: the speed measuring motor comprises a speed measuring motor rotor, 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; the voltmeter is connected with the speed measuring motor rotor in parallel.
3. A torque motor capable of monitoring rotational speed and compensating output according to claim 1, wherein: the first rotor support and the second rotor support respectively 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 support, and the speed measuring motor rotor is sleeved on the outer cylinder of the second rotor support; wherein the rear end of the second rotor support extends to the outside of the rear end of the transmission shaft.
4. A torque motor capable of monitoring rotational speed and compensating output according to claim 3, 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 tightly attached to the bearing, and the front end of the inner cylinder of the first rotor bracket is locked and positioned by a retainer ring; the front end of the inner cylinder of the second rotor support is also tightly attached to the bearing, and the rear end of the inner cylinder of the second rotor support is pressed and fixed by a pressing plate fixed to the rear end of the transmission shaft.
5. A torque motor capable of monitoring rotational speed and compensating output according to claim 1, wherein: the inner side of the connecting diaphragm is tightly pressed and fixed on the second rotor bracket through an inner pressure ring, and the outer side of the connecting diaphragm is tightly pressed and fixed on the friction ring through an outer pressure ring; and two friction plates surrounding the friction ring are respectively fixed on two sides of the friction ring.
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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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| CN201911304658.0A CN110880828B (en) | 2019-12-17 | 2019-12-17 | Moment motor capable of monitoring rotating speed and compensating output |
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| CN110880828B CN110880828B (en) | 2024-05-28 |
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| Publication number | Publication date |
|---|---|
| CN110880828B (en) | 2024-05-28 |
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