CN110552980A - Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system - Google Patents
Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system Download PDFInfo
- Publication number
- CN110552980A CN110552980A CN201910743470.XA CN201910743470A CN110552980A CN 110552980 A CN110552980 A CN 110552980A CN 201910743470 A CN201910743470 A CN 201910743470A CN 110552980 A CN110552980 A CN 110552980A
- Authority
- CN
- China
- Prior art keywords
- brake
- braking
- connecting lever
- axial force
- servo motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- -1 equipment Substances 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/226—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is moved axially, e.g. floating caliper disc brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
- F16D65/095—Pivots or supporting members therefor
- F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
- F16D65/0971—Resilient means interposed between pads and supporting members or other brake parts transmitting brake actuation force, e.g. elements interposed between brake piston and pad
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/24—Electric or magnetic using motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention belongs to the technical field of brake control of mine hoisting equipment, and provides an electromechanical actuator for increasing axial force brake, which comprises a servo motor, a brake bracket, a left connecting lever, a right connecting lever and two brake heads, wherein the two brake heads are symmetrically arranged at two sides of a brake disc, one end of each brake head is provided with a brake shoe matched with the brake disc, and the other end of each brake head is fixedly connected with one end of the left connecting lever and one end of the right connecting lever; the stator of the servo motor is arranged on the brake bracket, two ends of the rotor of the servo motor are respectively connected with the other ends of the left connecting lever and the right connecting lever through a first lead screw with a left end thread and a second lead screw with a right end thread on the surface, and the directions of the left end thread and the right end thread are opposite; the left connecting lever and the right connecting lever are respectively arranged on two sides of the brake bracket through a spherical fulcrum. The invention has the advantages of simple structure, reliable operation, high precision and high efficiency, and can be widely applied to the field of braking of mine hoists.
Description
Technical Field
The invention belongs to the technical field of braking control of mine hoisting equipment, and particularly relates to an all-electric braking system and an all-electric braking system of the mine hoisting equipment, in particular to an electromechanical actuator for increasing axial force braking and a braking system of the mine hoisting equipment.
Background
The mine hoisting equipment comprises a mine hoist and a mine hoisting winch, is throat equipment for mining, and is used for carrying important tasks of conveying minerals, equipment, materials and personnel between the upper part and the lower part of the mine, and the performance of the mine hoisting equipment is very important for safe production of the mine. Wherein the braking system, i.e. the braking system, is a key component in relation to improving the safety performance of the equipment. At present, the working braking and safety braking processes of a braking system of a lifting device are mainly completed by a hydraulic braking system, and the braking system is composed of a disc brake, a hydraulic station, an electric control cabinet, a hydraulic pipeline and a connecting cable. The main working principle is that a hydraulic control valve is adopted to adjust the oil pressure of the system in the braking process of the lifting equipment, but the system has poor pollution resistance, high cost, large maintenance workload and low reliability. If equipment maintenance is somewhat inadvertent, a significant safety hazard may occur during safety braking. Therefore, an all-electric brake system and an all-electric brake system of the mine hoisting equipment are developed. The mine hoisting equipment all-electric brake system is characterized in that all brake devices of the mine hoisting equipment adopt electric transmission devices as power driving sources, and the mine hoisting equipment all-electric brake system adopts an electric transmission device except all brake devices of the mine hoisting equipment, and a main dragging motor of the mine hoisting equipment also adopts an electric brake mode of variable frequency feedback braking as an auxiliary brake mode to participate in braking. The disc brake device (patent application number ZL 201610654914.9) for the voice coil motor transmission special for the mine hoist is developed by adopting electric energy to replace hydraulic energy transmission, but the defect that the axial force of the voice coil motor is too small in practical use exists, and the disc brake device can only meet the use requirement of small-sized hoisting equipment, and large-sized hoisting equipment, particularly a multi-rope friction type hoist, has large corresponding braking force requirement due to large hoisting force. Therefore, the electromechanical actuator of the full electric braking mine hoisting equipment for increasing the axial force is developed, so that the full electric braking technology can meet the use requirement of the braking force of all mine hoisting equipment.
Disclosure of Invention
the invention overcomes the defects of the prior art, and solves the technical problems that: the electromechanical actuator for increasing the axial force brake is provided, so that the full electric brake of the mine hoisting equipment is realized, and the operation safety of the mine hoisting equipment is improved.
In order to solve the technical problems, the invention adopts the technical scheme that: an electromechanical actuator for increasing axial force braking comprises a servo motor, a brake bracket, a left connecting lever, a right connecting lever and two brake heads, wherein the two brake heads are symmetrically arranged at two sides of a brake disc, one end of each brake head is provided with a brake shoe matched with the brake disc, and the other end of each brake head is fixedly connected with one end of the left connecting lever and one end of the right connecting lever respectively; the servo motor comprises a stator, a rotor, a left connecting lever, a right connecting lever, a left connecting lever, a right connecting; the left connecting lever and the right connecting lever are respectively arranged on two sides of the brake bracket through a spherical fulcrum.
The brake head comprises a connecting bolt, a connecting shaft, an adjusting nut, a disc spring and a cylinder body, one end of the connecting shaft is fixedly connected with the brake shoe, the other end of the connecting shaft is fixedly connected with the left connecting lever or the right connecting lever through the connecting bolt, the adjusting nut is arranged on the periphery of the connecting bolt and is connected with the brake shell through threads, the cylinder body is arranged on the outer side of the circumference of the connecting shaft, one end of the cylinder body is fixedly connected with the brake shoe, and one end, close to the cylinder body, of the adjusting nut is provided with a groove matched with the other; the disc spring is arranged between the cylinder body and the connecting shaft, and two ends of the disc spring are respectively contacted with the cylinder body and the adjusting nut.
The electromechanical actuator for increasing the axial force braking further comprises a sliding sleeve arranged on the outer side of the circumference of the connecting shaft and a spring pad arranged between the belleville spring and the adjusting nut.
The electromechanical actuator for increasing the axial force braking further comprises an electromagnetic clutch, and the electromagnetic clutch is arranged on an output shaft of the servo motor.
The electromechanical actuator for increasing the axial force braking further comprises an electric control device, the output end of the electric control device is connected with the electromagnetic clutch and the control end of the servo motor, a normal working braking mode and an emergency safety braking mode are arranged in the electric control device, and the electric control device controls the servo motor to work in the normal working braking mode; and under the emergency safety braking mode, the electric control device controls the electromagnetic clutch to work.
The electromechanical actuator for increasing the axial force braking further comprises a detection feedback device, wherein the detection feedback device comprises a position sensor, a pressure sensor and a speed measurement sensor, the position sensor is used for measuring the position of a lead screw, the pressure sensor is arranged on a brake shoe and used for measuring the braking pressure of the electromechanical actuator, and the speed measurement sensor is used for measuring the rotating speed of a servo motor; and the output ends of the position sensor, the pressure sensor and the speed measuring sensor are connected with the input end of the electric control device.
In addition, the invention also provides a mine hoisting equipment braking system for increasing axial force braking, which comprises a plurality of electromechanical actuators.
The plurality of electromechanical actuators are averagely divided into at least two groups, and the electric control device is used for starting electromagnetic clutches of the electromechanical actuators in different groups in a grading manner to brake in an emergency safety braking mode.
The input end of the electric control device is connected with the identification control system for identifying the running direction of the hoist, and is used for outputting emergency braking torques with different magnitudes according to different running directions.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention replaces the oil cylinder pusher with the electromechanical actuator, and the whole mine hoist system removes a hydraulic station system, thereby simplifying the system configuration and having the advantages of simple structure, reliable operation, high precision and high efficiency; meanwhile, the electrical servo control performance is comparable to that of hydraulic proportional control, even the performance index is more excellent, the overall material cost is reduced, and the development of the electric and electronic motion mechanisms such as a servo motor, a linear motor of an electromechanical actuator and the like is rapid, so that the possibility is brought to the high-speed development of the electrification, informatization and intelligentization technology of the full electric braking technology of the mine hoist.
2. By adopting the technical scheme of the invention, the full-electric braking system has the function of performing bidirectional regulation on the braking deceleration, has good conditions for realizing constant closed-loop control, and has the braking performance of high response speed and high control precision. Meanwhile, the electric drive is adopted to replace the hydraulic drive, so that the problems of oil leakage, pollution, complex system, difficult maintenance and the like are fundamentally solved.
3. By adopting the technical scheme of the invention, the number of the brakes can be adjusted according to the braking torque requirement, and the braking force can be changed by adjusting the current of the linear motor when the number of the brakes is fixed. The electromechanical actuator electric brake system for increasing the axial force can meet the requirement of all lifting equipment on the braking torque.
4. electrification converts hydraulic and pneumatic operations into electromechanical motion, and machine performance can be remarkably improved and cost advantages can be obtained through electrification. The cost of the electric actuator is lower than that of a hydraulic and pneumatic system with the same function. Especially, the constant deceleration braking system adopting the electromechanical actuator of the all-electric braking system saves the cost by at least 50 percent compared with the original hydraulic constant deceleration braking system.
5. Hydraulic systems require fluid replacement, leak repair, and other routine maintenance, while electric linear actuators avoid the environmental problems and costs associated with hydraulic fluid leaks and fluid handling and are maintenance free and create cleaner and healthier environments.
6. The electromechanical actuator has high integration level: the controller, the motor and the sensor are integrally designed, and the high power density and miniaturization design of the actuator are realized. Greatly reducing the area of the lifting equipment garage. On the premise of achieving the same function, the electric linear actuator is installed more quickly and conveniently than a plurality of hydraulic and pneumatic components. The method is more significant for underground lifting equipment or derrick type lifting equipment. Outstanding precision and repeatability are connected and the automatic synchronization process, and convenient remote control uses electronic linear actuator to replace the pneumatic cylinder, can simplify the installation and reduce the equipment size, reduces the control degree of difficulty, reduces the energy cost, improves the precision, reduces the maintenance volume and noise reduction.
Drawings
FIG. 1 is a schematic diagram of an electromechanical actuator for providing increased axial force braking in accordance with an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a brake head according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a power driving source according to an embodiment of the present invention;
In the figure: the brake device comprises a servo motor 1, a left connecting lever 2, a lever spherical fulcrum 3, a brake head 4, a brake shoe 5, a right connecting lever 6, a brake disc 7, a brake support 8, an electromagnetic clutch 9, an end cover 11, a connecting bolt 12, an adjusting nut 13, a disc spring 14, a cylinder body 15, a brake shell 16, a connecting shaft 17, a spring pad 18, a sliding sleeve 19, a groove 20, a first lead screw 21, a second lead screw 22, a left connecting shaft 23, a right connecting shaft 24 and a position sensor 25.
Detailed Description
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 ~ 3, an embodiment of the present invention provides an electromechanical actuator for increasing axial force braking, including a servo motor 1, a brake bracket 8, a left connecting lever 2, a right connecting lever 6, and two brake heads 4, where the two brake heads are symmetrically disposed on two sides of a brake disk 7, one end of each brake head is provided with a brake shoe 5 engaged with the brake disk 7, and the other end is fixedly connected with one end of the left connecting lever 2 and one end of the right connecting lever 6, respectively, a stator of the servo motor 1 is disposed on the brake bracket 8, two ends of a rotor thereof are connected with the other ends of the left connecting lever 2 and the right connecting lever 6 through a first lead screw 21 provided with a left end thread and a second lead screw 22 provided with a right end thread, respectively, directions of the left end thread and the right end thread are opposite, and the left connecting lever 2 and the right connecting lever 6 are disposed on two sides of the brake bracket 8 through a spherical fulcrum.
In this embodiment, the two brake heads 4 are the executing parts of the whole electromechanical actuator, the servo motor 1 is the power driving source of the whole electromechanical actuator device, and the left and right link mechanisms are lever mechanisms, which serve to connect the electric driving device with the mechanical executing device and amplify and transmit the power of the motor driving device, and the difference of the pivot positions determines the difference of the amplification factors. The two brake heads 4 are used as the executing parts of the electromechanical actuator, the braking force exerted on the brake disc is equal in magnitude and opposite in direction, and the braking force is strong on the brake disc. In addition, the electromechanical actuator also comprises an electric control device which is used for controlling the electric motor device 1 to simultaneously control two brake heads in one electromechanical actuator to perform brake releasing or braking according to engineering requirements through a link mechanism according to a program.
Specifically, as shown in fig. 2, the brake head 4 includes a connecting bolt 12, a connecting shaft 17, an adjusting nut 13, a disc spring 14, and a cylinder 15, one end of the connecting shaft 17 is fixedly connected with the brake shoe 5, the other end of the connecting shaft 17 is fixedly connected with the left connecting lever 2 or the right connecting lever 6 through the connecting bolt 12, the adjusting nut 13 is disposed on the periphery of the connecting bolt 12 and connected with the brake housing 16 through a thread, the cylinder 15 is disposed on the outer side of the circumference of the connecting shaft 17, and one end of the cylinder 15 is fixedly connected with the brake shoe 5, and one end of the adjusting nut 13 close to the cylinder 15 is provided with a groove 11 matched with the other end; the disc spring 14 is disposed between the cylinder 15 and the connecting shaft 17, and both ends are in contact with the cylinder 15 and the adjusting nut 13, respectively.
Specifically, the present embodiment provides an electromechanical actuator for increasing axial force braking, further comprising a sliding sleeve 19 disposed on the outer circumference of the connecting shaft 17 and a spring pad 18 disposed between the belleville spring 14 and the adjusting nut.
Specifically, as shown in fig. 1 and 3, the electromechanical actuator for increasing axial force braking provided by the present embodiment further includes an electromagnetic clutch 9, and the electromagnetic clutch 9 is disposed on an output shaft of the servo motor 1.
As shown in fig. 3, a left connecting shaft 23 and a right connecting shaft 24 are further respectively disposed at two ends of the rotor of the servo motor 1, and are respectively disposed at the outer sides of the first lead screw 21 and the second lead screw 22, and the left connecting shaft 23 and the right connecting shaft 24 are used for disposing a fastening nut to fasten the motor rotor and the connecting lever.
Specifically, the electromechanical actuator for increasing the axial force braking provided by this embodiment further includes an electric control device, an output end of the electric control device is connected to the electromagnetic clutch 9 and a control end of the servo motor 1, a normal working braking mode and an emergency safety braking mode are provided in the electric control device, and the electric control device controls the servo motor 1 to work to realize braking in the normal working braking mode; in the emergency safety braking mode, the electric control device controls the electromagnetic clutch 9 to work to realize braking. The servo linear motor device 1 and the electromagnetic clutch 9 are coaxially designed, so long as the electromagnetic clutch 9 acts, no matter what working state the servo motor device is, the electromagnetic clutch can instantly act, the left connecting lever and the right connecting lever can be automatically separated, under the pushing of the internal force released by the disc spring group 14, the cylinder body 15 and the brake shoe 5 can approach to the direction of the brake disc at the fastest speed until the brake disc is completely contacted, the disc spring group 14 releases the residual precompression force to the brake disc, the brake is in a braking state, the lifting equipment can be emergently and safely braked, and the safety of the mine lifting equipment is guaranteed to the maximum extent.
The working principle of the invention is as follows: the electromechanical actuator generates braking force by a disc spring and rotates by a servo motor to drive a connecting lever to rotate so as to pull a connecting shaft to overcome the braking force of the disc spring to release the brake; and in the braking state, the spring force of the disc spring group is utilized to perform brake-on braking. When the current of the servo linear motor is reduced to zero (in the process of braking), the spring force generated by the disk spring pre-tightening acts on the brake shoe through the connecting shaft arranged in the disk spring, and the applied forward spring force enables the brake shoe to be attached to the brake disc to generate braking positive pressure, so that the rotation trend of the brake disc can be restricted. The current of the servo linear motor is increased (in the brake releasing process), when the current is gradually increased to the rated working current, the cylinder body connected with the brake shoe is driven to overcome the pretightening force of the disc spring and compress the disc spring to generate displacement in the opposite direction of the brake disc, the cylinder body drives the brake shoe to move backwards through the connecting stud and the connecting shaft arranged in the disc spring, a gap is formed between the brake shoe and the brake disc, and therefore the brake positive pressure acting on the brake disc is relieved.
The specific working process is as follows: when the servo motor is electrified and then rotates, the reverse threads (the left end threads and the right end threads) at the two ends of the rotor enable the lower ends of the left connecting lever and the right connecting rod to move inwards, the upper end of the rotor pulls the connecting bolt 12 to drive the cylinder body 15 to move in the direction away from the brake disc 7, so that the disc spring group 14 is in a pre-compression state, the current of the servo motor is continuously increased to the maximum designed current value, and the disc spring group 14 is in the maximum pre-compression state. At this time, the adjusting nut 13 is rotated to bring the brake shoe 5 together with the connecting bolt 12 and the cylindrical body 15, and the whole moves closer to the brake disk 7. When the clearance between the brake shoe 5 and the brake disc 7 reaches a preset value (generally less than or equal to 1mm), the rotation is stopped and the brake is locked. At the moment, with the reduction of the external current, under the pushing of the internal force released by the disc spring set 14, the cylinder 15 and the brake shoe 5 continue to approach the brake disc 7 until the cylinder and the brake shoe are completely contacted; the current is further reduced to zero, and the disc spring assembly 14 releases the remaining pre-compression force to the brake disc, so that the brake is in a braking state, and the force is the maximum braking force generated by the disc brake. When current with preset working pressure is introduced into the linear motor again, the connecting bolt 12 pushes the cylinder 15 and the brake shoe 5 to move outwards, and the cylinder 15 and the brake shoe 5 are separated from the brake disc 7 by a certain distance, and the disc spring group 14 is in a pre-compression state again, namely a brake release state. The disc brake repeatedly works in a braking state and a brake releasing state according to working requirements. When the current of the motor stator of the electromechanical actuator is reduced to the lowest value of the system, the positive pressure acting on the brake disc reaches the maximum value, the friction force generated between the disc brake and the brake disc is the working braking force of the elevator, and the elevator is in a normal working braking state.
When the mine hoisting equipment needs emergency braking due to an emergency or power failure in the hoisting process, no matter the servo motor device works at any position, the electric control device inputs signals to control the electromagnetic clutch 9 to act instantaneously, one part of the coil of the electromagnetic clutch is powered off, the left and right connecting lever devices are disconnected, under the pushing of the internal force released by the disk spring group 14, the cylinder body 15 and the brake shoe 5 approach to the direction of the brake disc at the fastest speed until the cylinder body and the brake shoe are completely contacted, the disk spring group 14 releases the residual precompression force to the brake disc, the brake is in a braking state, the hoisting equipment is decelerated according to a certain deceleration, after the preset delay time is reached, the coil of the residual electromagnetic clutch is powered off, at the moment, the disk spring applies the preset braking force on the brake disc, and the brake disc brake of the brake has the maximum positive pressure on the, the friction between the disc brake and the brake disc is the maximum braking force of the hoisting system, and the hoisting machine is stopped and in a safe braking state.
Specifically, the electromechanical actuator for increasing the axial force braking provided by this embodiment further includes a detection feedback device, where the detection feedback device includes a position sensor, a pressure sensor and a speed sensor, the position sensor is used to measure the position of the lead screw, the pressure sensor is disposed on the brake shoe 5 and is used to measure the braking pressure of the electromechanical actuator, and the speed sensor is used to measure the rotation speed of the servo motor 1; and the output ends of the position sensor, the pressure sensor and the speed measuring sensor are connected with the input end of the electric control device. When the linear motor device cannot work due to faults (such as sudden faults of the motor device and blockage of a special screw rod device) or the system fails to work due to power failure, the electromagnetic clutch can instantaneously act to disconnect the left and right connecting lever devices, and the brake head can automatically enter an emergency safety braking mode to act, so that a lifting equipment system is protected, and other accidents are prevented.
In addition, in this embodiment, the controller of the electronic control unit is implemented using a microprocessor-based printed circuit board, with additional software allowing communication between remote networks, with built-in CAN bus support, and continuous monitoring of critical motor parameters (e.g., voltage, speed, force and temperature) CAN protect the actuators and machinery by preventing movement beyond normal limits. The built-in stroke end limit switch is installed in the actuator, ensuring smooth and repeatable operation and protecting the connecting equipment and the actuator. The device CAN additionally communicate with any other equipment with a CAN field bus. Specifically, the servo motor 1 can select a 24V dc servo motor device as a driving power supply, and since 24V is a safe voltage, personal casualty accidents caused by motor leakage can be avoided.
In the embodiment of the invention, the method for increasing the braking force by the lever mechanism can meet the use requirements of all mine hoisting equipment, and the design of the electromagnetic clutch device also ensures the requirements of the national coal mine safety regulation on the brake. The original hydraulic mechanical brake execution part function is reserved, a hydraulic station part and an oil pipe part are omitted, the mechanism is simple, and the cost is obviously reduced. Meanwhile, the electromechanical actuator is easy to control, the precision is improved, and the maintenance is convenient. In addition, in the embodiment of the invention, the electromechanical actuator device is internally provided with the communication device and the integrated current monitoring function, when the motor of the electromechanical actuator is overloaded during running, the device can automatically cut off the power supply, so that the motor cannot be burnt, and meanwhile, a fault feedback signal is sent to the electric control system of the hoist, so that the safe running of the mine hoisting equipment is ensured. The invention adopts the electromechanical actuator to replace hydraulic transmission, thereby thoroughly avoiding the phenomena of oil pollution, high failure rate, inconvenient maintenance, leakage and the like caused by a hydraulic station and an oil pipeline, and the common problems of hydraulic transmission, such as incapability of automatically controlling the oil cylinder, low production efficiency and the like. The method has high control precision, is convenient for automatic control, and is environment-friendly, safe and reliable.
The invention can be applied to mine hoist, mine hoisting winch, belt transmission equipment, building hoist, crane and elevator equipment, and the braking working principle is the same as that of the mine hoisting equipment. The electromechanical actuator has simple structure and small size, so the electromechanical actuator is applied to the existing reconstruction equipment, does not need to change the mechanical size of the brake of the original mine hoisting equipment, and is very easy to reconstruct the existing equipment.
Specifically, embodiments of the present invention also provide a mine hoist braking system with increased axial force braking, including multiple pairs of electromechanical actuators as shown in FIG. 1 ~ 3, the electromechanical actuators are symmetrically used in pairs, and no additional side load is generated on the brake disc and the winding drum.
During safe braking, the brakes can be divided into two groups, one group is firstly put into operation, and the second group is put into operation after a certain time interval, so that a two-stage braking constant torque braking mode is conveniently realized. The special software can also be designed into a double-second-stage braking constant-torque braking mode based on direction automatic identification, and the double-second-stage braking constant-torque braking mode has an automatic direction identification control system for lifting and lowering the hoister, so that when the lifting and lowering working conditions are automatically identified, the second-stage braking is implemented according to different requirements of different emergency braking torques in the direction and different emergency braking requirements, and the requirement of the double-second-stage braking constant-torque braking function is met. In addition, no hardware facilities are required to be added, and the emergency safety braking mode can be designed into a constant deceleration braking mode by matching with special constant deceleration control software.
Specifically, in the electromechanical braking system provided in this embodiment, the emergency safety braking mode in the electronic control device is designed to be a two-stage constant torque braking mode, the number of the configured braking head devices is different according to different models of the mine hoisting equipment, generally, at least four pairs of braking heads are configured, the braking heads are equally distributed into two groups, and one group of instantaneous braking generates a first-stage braking torque, so that the hoisting equipment generates a deceleration rate meeting the requirements of the coal mine safety regulations, thereby ensuring that the whole hoisting system decelerates stably and reliably. And the other group delays for a period of time after calculation to apply all the second-stage braking torque, so that the lifting equipment generates braking torque meeting the regulation of coal mine safety regulations, and finally, the lifting equipment is safely in a static state. The emergency safety braking mode can also be designed as a multistage constant-torque braking mode. The braking heads are evenly distributed into a plurality of groups, so that the working time of each group is different, and a multistage constant torque braking mode can be realized.
In addition, in this embodiment, the emergency safety braking mode may be configured with dedicated constant deceleration control software to be designed as a constant deceleration braking mode. The emergency safety braking mode can be designed into a double-second-stage braking constant-torque braking mode based on direction automatic identification according to special software, and the automatic direction identification control system is used for lifting and lowering the hoister, so that when the lifting and lowering working conditions are automatically identified, second-stage braking is implemented according to different requirements of different emergency braking torques in directions and different emergency braking requirements, and the requirement of a double-second-stage braking constant-torque braking function is met.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. the electromechanical actuator for increasing the axial force brake is characterized by comprising a servo motor (1), a brake support (8), a left connecting lever (2), a right connecting lever (6) and two brake heads (4), wherein the two brake heads are symmetrically arranged on two sides of a brake disc (7), one end of each brake head is provided with a brake shoe (5) matched with the brake disc (7), and the other end of each brake head is fixedly connected with one end of the left connecting lever (2) and one end of the right connecting lever (6) respectively; the stator of the servo motor (1) is arranged on a brake support (8), two ends of a rotor of the servo motor are respectively connected with the other ends of a left connecting lever (2) and a right connecting lever (6) through a first lead screw (21) and a second lead screw (22), the surfaces of the first lead screw and the second lead screw are provided with left end threads, and the thread directions of the left end threads and the right end threads are opposite; the left connecting lever (2) and the right connecting lever (6) are respectively arranged on two sides of the brake bracket (8) through a spherical fulcrum.
2. The electromechanical actuator for increasing the axial force brake is characterized in that the brake head (4) comprises a connecting bolt (12), a connecting shaft (17), an adjusting nut (13), a disc spring (14) and a cylinder body (15), one end of the connecting shaft (17) is fixedly connected with the brake shoe (5), the other end of the connecting shaft is fixedly connected with the left connecting lever (2) or the right connecting lever (6) through the connecting bolt (12), the adjusting nut (13) is arranged on the periphery of the connecting bolt (12) and is connected with the brake shell (16) through threads, the cylinder body (15) is arranged on the outer side of the circumference of the connecting shaft (17), one end of the cylinder body (15) is fixedly connected with the brake shoe (5), and a groove (20) matched with the other end of the cylinder body (15) is arranged at one end, close to the cylinder body (15), of the adjusting nut (13); the disc spring (14) is arranged between the cylinder body (15) and the connecting shaft (17), and two ends of the disc spring are respectively contacted with the cylinder body (15) and the adjusting nut (13).
3. An electromechanical actuator with increased axial force braking according to claim 2, characterised by a sliding sleeve (19) arranged outside the circumference of the connecting shaft (17) and a spring washer (18) arranged between the belleville spring (14) and the adjusting nut (13).
4. An electro-mechanical actuator with increased axial force braking according to claim 1, characterised by further comprising an electromagnetic clutch (9), the electromagnetic clutch (9) being arranged on the output shaft of the servo motor (1).
5. The electromechanical actuator for increasing the axial force braking according to claim 4, further comprising an electric control device, wherein an output end of the electric control device is connected with the electromagnetic clutch (9) and a control end of the servo motor (1), a normal working braking mode and an emergency safety braking mode are arranged in the electric control device, and the electric control device controls the servo motor (1) to work in the normal working braking mode; under the emergency safety braking mode, the electric control device controls the electromagnetic clutch (9) to work.
6. The electromechanical actuator for increasing the axial force brake as claimed in claim 4, further comprising a detection feedback device, wherein the detection feedback device comprises a position sensor, a pressure sensor and a speed sensor, the position sensor is used for measuring the position of the screw, the pressure sensor is arranged on the brake shoe (5) and is used for measuring the brake pressure of the electromechanical actuator, and the speed sensor is used for measuring the rotating speed of the servo motor (1); and the output ends of the position sensor, the pressure sensor and the speed measuring sensor are connected with the input end of the electric control device.
7. A mine hoist braking system with increased axial force braking comprising a plurality of electromechanical actuators as claimed in claim 1.
8. The mine hoist braking system with increased axial force braking of claim 7, wherein the plurality of electromechanical actuators are equally divided into at least 2 groups and the electrical control device is configured to activate electromagnetic clutch braking of the electromechanical actuators in different groups in stages in the emergency safety braking mode.
9. The system of claim 7, wherein the input of the electrical control device is connected to a recognition control system for recognizing the direction of travel of the elevator, for outputting different magnitudes of the emergency braking torque according to different directions of travel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743470.XA CN110552980B (en) | 2019-08-13 | 2019-08-13 | Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743470.XA CN110552980B (en) | 2019-08-13 | 2019-08-13 | Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110552980A true CN110552980A (en) | 2019-12-10 |
| CN110552980B CN110552980B (en) | 2020-08-07 |
Family
ID=68737280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910743470.XA Active CN110552980B (en) | 2019-08-13 | 2019-08-13 | Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110552980B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237362A (en) * | 2020-01-14 | 2020-06-05 | 山西卓仕科技有限公司 | Electric cylinder hydraulic disc brake system and brake method |
| CN114506626A (en) * | 2022-03-09 | 2022-05-17 | 焦作神华重型机械制造有限公司 | Scraper conveyor for coal mining and control method |
| CN117902241A (en) * | 2024-01-24 | 2024-04-19 | 泰安市德众矿山机械有限公司 | Braking device applied to synchronous permanent magnet electric roller |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134459A (en) * | 1960-10-20 | 1964-05-26 | Bendix Corp | Caliper type spot brake |
| GB959118A (en) * | 1961-12-09 | 1964-05-27 | Mb Wild & Co Ltd | Improvements in or relating to brakes for mine winding gear |
| FR2262230A1 (en) * | 1974-02-27 | 1975-09-19 | Dba | |
| SU507473A2 (en) * | 1974-10-17 | 1976-03-25 | Коммунарский Горнометаллургический Институт | Brake for mine trolleys |
| SU551231A1 (en) * | 1975-05-28 | 1977-03-25 | Safety device in case of emergency vessel re-lifting at the lifting installation | |
| EP0220092A1 (en) * | 1985-10-11 | 1987-04-29 | Valeo | Control device for a coupling means such as a clutch or a gear box or a brake or the like |
| CN2398474Y (en) * | 1999-11-12 | 2000-09-27 | 李德一 | Foot hydraulic brake |
| CN2748696Y (en) * | 2004-10-13 | 2005-12-28 | 焦作瑞塞尔盘式制动器有限公司 | Electric failure caliper disc brake |
| CN2769602Y (en) * | 2005-02-05 | 2006-04-05 | 浙江矿山机械有限公司 | Spring braking disc-shape braker |
| CN2866970Y (en) * | 2006-02-23 | 2007-02-07 | 焦作瑞塞尔盘式制动器有限公司 | Power-failure protection clamp disc type brake |
| CN201896888U (en) * | 2010-10-20 | 2011-07-13 | 浙江科宝传动技术有限公司 | Disc brake braking mechanism |
| CN205780447U (en) * | 2016-05-25 | 2016-12-07 | 无锡天宝电机有限公司 | A kind of motor brake |
| CN109305633A (en) * | 2018-11-26 | 2019-02-05 | 山西腾然科技有限公司 | The full electrical brake system of mine hoist |
-
2019
- 2019-08-13 CN CN201910743470.XA patent/CN110552980B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3134459A (en) * | 1960-10-20 | 1964-05-26 | Bendix Corp | Caliper type spot brake |
| GB959118A (en) * | 1961-12-09 | 1964-05-27 | Mb Wild & Co Ltd | Improvements in or relating to brakes for mine winding gear |
| FR2262230A1 (en) * | 1974-02-27 | 1975-09-19 | Dba | |
| SU507473A2 (en) * | 1974-10-17 | 1976-03-25 | Коммунарский Горнометаллургический Институт | Brake for mine trolleys |
| SU551231A1 (en) * | 1975-05-28 | 1977-03-25 | Safety device in case of emergency vessel re-lifting at the lifting installation | |
| EP0220092A1 (en) * | 1985-10-11 | 1987-04-29 | Valeo | Control device for a coupling means such as a clutch or a gear box or a brake or the like |
| CN2398474Y (en) * | 1999-11-12 | 2000-09-27 | 李德一 | Foot hydraulic brake |
| CN2748696Y (en) * | 2004-10-13 | 2005-12-28 | 焦作瑞塞尔盘式制动器有限公司 | Electric failure caliper disc brake |
| CN2769602Y (en) * | 2005-02-05 | 2006-04-05 | 浙江矿山机械有限公司 | Spring braking disc-shape braker |
| CN2866970Y (en) * | 2006-02-23 | 2007-02-07 | 焦作瑞塞尔盘式制动器有限公司 | Power-failure protection clamp disc type brake |
| CN201896888U (en) * | 2010-10-20 | 2011-07-13 | 浙江科宝传动技术有限公司 | Disc brake braking mechanism |
| CN205780447U (en) * | 2016-05-25 | 2016-12-07 | 无锡天宝电机有限公司 | A kind of motor brake |
| CN109305633A (en) * | 2018-11-26 | 2019-02-05 | 山西腾然科技有限公司 | The full electrical brake system of mine hoist |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111237362A (en) * | 2020-01-14 | 2020-06-05 | 山西卓仕科技有限公司 | Electric cylinder hydraulic disc brake system and brake method |
| CN114506626A (en) * | 2022-03-09 | 2022-05-17 | 焦作神华重型机械制造有限公司 | Scraper conveyor for coal mining and control method |
| CN114506626B (en) * | 2022-03-09 | 2024-02-23 | 焦作神华重型机械制造有限公司 | Scraper conveyor for coal mining and control method |
| CN117902241A (en) * | 2024-01-24 | 2024-04-19 | 泰安市德众矿山机械有限公司 | Braking device applied to synchronous permanent magnet electric roller |
| CN117902241B (en) * | 2024-01-24 | 2024-06-21 | 泰安市德众矿山机械有限公司 | Braking device applied to synchronous permanent magnet electric roller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110552980B (en) | 2020-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110552980B (en) | Electromechanical actuator for increasing axial force braking and mine hoisting equipment braking system | |
| CN102030280B (en) | Mine-hoist constant deceleration safety braking system and braking method thereof | |
| US5226508A (en) | Disc brake for elevator drive sheave | |
| CN108622814B (en) | The integrated hoister system of the major-minor brake of one kind and its control method | |
| CN2810016Y (en) | Electric push rod | |
| CN105293247B (en) | A kind of limiter of speed and its application method | |
| CN208686672U (en) | A kind of mine hoist safety arrestment perseverance deceleration hydraulic control device | |
| EP0203758A2 (en) | Caliper disc brake assembly | |
| CN103697133B (en) | A kind of lifting device speed reducer | |
| CN107654545B (en) | Elevator host machine brake shoe abrasion detection device and detection method | |
| CN103711819A (en) | Electric brake actuator comprising signal conditioning module | |
| CN212225830U (en) | Hydraulic disc brake system of electric cylinder | |
| CN112963469B (en) | Caliper disc brake for monitoring braking positive pressure and monitoring method thereof | |
| CN109019391A (en) | A kind of winch booster brake device | |
| CN109305633A (en) | The full electrical brake system of mine hoist | |
| CN203474151U (en) | Overspeed governor provided with electromagnet trigger device | |
| CN203548769U (en) | Speed reducer of lifting device | |
| CN105302052B (en) | A kind of mining elevator electric control gear system and control method | |
| CN106115533B (en) | A kind of disc brake device of the special voice coil motor drive of mine hoist | |
| CN111237362B (en) | Electric cylinder hydraulic disc brake system and brake method | |
| CN207361670U (en) | A kind of mine hoist torque-controllable sure brake system | |
| CN206033106U (en) | Driven disc brake device of special voice coil motor of mine winder | |
| CN213479007U (en) | Explosion-proof brake device structure based on hydraulic system | |
| CN2765000Y (en) | Electromagnetic electricity-losing brake with high pulling torque | |
| CN204873325U (en) | Speed limiter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201012 Address after: No.706-17, 7 / F, block a, Shengjiu building, No.52 Longsheng street, Tanghuai Park, Taiyuan City, Shanxi Province Patentee after: Shanxi Zhuoshi Technology Co.,Ltd. Address before: 030001 Nanhua gate 19, Xinghualing District, Taiyuan, Shanxi Patentee before: Zhao Ruifeng |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240207 Address after: 030082, No. 206, Xijia North Street, Tanghuai Industrial Park, Shanxi Transformation and Comprehensive Reform Demonstration Zone, Taiyuan City, Shanxi Province Patentee after: Shanxi Xinfusheng Heavy Machinery Co.,Ltd. Country or region after: China Address before: Room 706-17, 7th Floor, Building A, Shengjiu Building, No. 52 Longsheng Street, Taiyuan Tanghuai Park, Shanxi Comprehensive Reform Demonstration Zone, Xiaodian District, Taiyuan City, Shanxi Province, 030006 Patentee before: Shanxi Zhuoshi Technology Co.,Ltd. Country or region before: China |