CN213879296U - Rotary driving mechanism and construction equipment - Google Patents
Rotary driving mechanism and construction equipment Download PDFInfo
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- CN213879296U CN213879296U CN202022609927.9U CN202022609927U CN213879296U CN 213879296 U CN213879296 U CN 213879296U CN 202022609927 U CN202022609927 U CN 202022609927U CN 213879296 U CN213879296 U CN 213879296U
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Abstract
The utility model provides a rotary driving mechanism and construction equipment relates to rotary system technical field. The utility model discloses a rotary driving mechanism, including electrical system and mechanical transmission system, electrical system includes main transformer, two rectification repayment units, public direct current generating line and the frequency conversion-dc-to-ac converter that electricity is connected in proper order, mechanical transmission system includes the motor, the frequency conversion-dc-to-ac converter with the motor is connected. According to the technical scheme of the utility model, two sets of rectification feedback units are arranged, so that the energy conversion efficiency is improved, and the energy loss is reduced; the motor is provided with a stable power supply under the working condition, the braking force is converted into electric energy through the motor under the rotary braking condition, the energy recycling is realized, and the disturbance to a power grid is not caused during the energy recycling; meanwhile, the condition of inversion failure is not generated, and the state conversion mode of the motor-generator is optimized; the voltage of the common direct current bus circuit is constant and is not influenced by the voltage fluctuation of the power grid.
Description
Technical Field
The utility model relates to a rotation system technical field particularly, relates to a rotary driving mechanism and construction equipment.
Background
The electric shovel is the main equipment of open-pit mining, mainly comprises operating device, system of getting on the bus and system of getting off the bus, and wherein the system of getting on the bus mainly contains rotary platform and rotary drive system, plays to rise system, weight box, ventilation dust removal, canopy and electrical accessories etc. to operating device installs on rotary platform. The slewing system can realize 360-degree full slewing of the platform and the upper mounting part, can realize reliable braking in emergency, and is one of necessary systems for the electric shovel to realize excavation and loading and unloading operations.
At present, in a slewing system, an electric shovel slewing drive electrical system mainly adopts an alternating current variable frequency speed regulation system, only one set of rectifying unit is arranged in the alternating current variable frequency speed regulation system, and the alternating current variable frequency speed regulation system does not have the function of rectifying feedback.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be that the slewing drive mechanism energy consumption is higher.
In order to solve the above problems, the present invention provides a rotary driving mechanism, which comprises an electrical system and a mechanical transmission system, wherein the electrical system comprises a main transformer, two rectification feedback units, a common dc bus and a frequency conversion-inverter, which are electrically connected in sequence, the mechanical transmission system comprises a motor, and the frequency conversion-inverter is connected with the motor; when the rotary driving mechanism is in an operation working condition, the main transformer is used for providing alternating current, the output end of the main transformer is connected with the two rectification feedback units, the rectification feedback units are used for converting the alternating current into direct current, the direct current is suitable for entering the variable frequency-inverter through the common direct current bus, and the variable frequency-inverter is used for converting the direct current into the alternating current to drive the motor; when the rotary driving mechanism is in a rotary braking working condition, the motor is used for providing alternating current, the frequency conversion-inverter is used for converting the alternating current into direct current, the direct current is suitable for entering the two rectification feedback units through the public direct current bus, the rectification feedback units are used for converting the direct current into the alternating current and transmitting the alternating current to the main transformer, and the main transformer is used for boosting the alternating current and transmitting the alternating current to a power grid.
The rotary driving mechanism of the utility model improves the energy conversion efficiency and reduces the energy loss by arranging two sets of rectification feedback units; the motor is provided with a stable power supply under the working condition, the braking force is converted into electric energy through the motor under the rotary braking condition, the energy recycling is realized, and the disturbance to a power grid is not caused during the energy recycling; meanwhile, the condition of inversion failure is not generated, and the state conversion mode of the motor-generator is optimized; the voltage of the common direct current bus circuit is constant and is not influenced by the voltage fluctuation of the power grid.
Preferably, the electric system further comprises a high-voltage current collector, a high-voltage load switch, an isolating switch and a main contactor which are connected in sequence, wherein the main contactor is connected with the main transformer, and the high-voltage current collector is used for receiving the alternating current transmitted by the power grid and transmitting the alternating current to the main transformer sequentially through the high-voltage load switch, the isolating switch and the main contactor.
Slewing drive mechanism, through setting up high voltage current-collector, high voltage load switch, isolator and main contactor and entering main transformer's switchgear as the high-tension electricity, effectively improved main transformer's security.
Preferably, the two rectification feedback units are arranged in parallel, when the rotary driving mechanism is in an operation working condition, the common direct current bus is a direct current output bus of the two rectification feedback units, and when the rotary driving mechanism is in a rotary braking working condition, the common direct current bus is a direct current input bus of the two rectification feedback units.
Rotary driving mechanism, through setting up the parallelly connected setting of two rectification repayment units, improved energy conversion efficiency, effectively reduced energy loss.
Preferably, the inverter-inverter includes an inverter portion having a rectifying state and an inverting state, the inverter portion is adapted to convert the ac power provided by the motor into dc power and transmit the dc power to the common dc bus in the rectifying state, and the inverter portion is adapted to convert the dc power provided by the common dc bus into ac power to drive the motor in the inverting state.
The rotary driving mechanism carries out AC-DC conversion through the inversion part of the frequency conversion-inverter, and realizes the normal operation of an electrical system and a mechanical transmission system under the working condition and the rotary braking working condition.
Preferably, the mechanical transmission system further comprises a brake, a rotary speed reducer, a rotary platform, a roller set, a gear ring, a lower frame, a rotary shaft, a gear and a central connecting shaft, the motor is connected with the brake and the rotary speed reducer respectively, the rotary speed reducer is connected with the rotary platform, the rotary platform is connected with the gear ring through the roller set, the gear ring is installed on the lower frame, the upper end of the rotary shaft is connected with the rotary speed reducer, the gear is meshed with the gear ring, and the central connecting shaft is connected with the rotary platform, the roller set, the gear ring and the lower frame respectively.
Gyration actuating mechanism, convert braking force into the electric energy through setting up mechanical transmission system, realize the recovery of braking energy and recycle.
Preferably, the motor comprises an output shaft, the rotary speed reducer comprises a parallel shaft pinion and a parallel shaft bull gear, the output shaft is connected with the parallel shaft pinion, and the parallel shaft pinion is meshed with the parallel shaft bull gear.
Slewing drive mechanism, through output shaft and the parallel axis pinion connection who sets up the motor, parallel axis pinion and parallel axis gear wheel meshing realize the power transmission of motor.
Preferably, the rotary speed reducer further comprises a planetary gear transmission, and an output end of the planetary gear transmission is connected with the rotary shaft key.
Slewing drive mechanism, through setting up planetary gear drive's output and revolving axle key-type connection, realize the transmission of moment of torsion.
Preferably, the motor is connected with the rotary speed reducer through a fastener, and a power output end of the motor is connected with the parallel shaft pinion key.
Slewing drive mechanism, pass through the fastener through setting up the motor and be connected with the slewing reducer, the power take off end and the parallel axis pinion key-type connection of motor realize the transmission of moment of torsion.
The utility model also provides a construction equipment, including a plurality of above slewing drive mechanism. The construction equipment has the same advantages as the rotary driving mechanism compared with the prior art, and the detailed description is omitted.
Preferably, any one of the rotary drive mechanisms comprises a motor, and a plurality of the motors are mechanically coupled.
Construction equipment, through setting up mechanical coupling between the motor, promote the operating efficiency.
Drawings
Fig. 1 is a single-line schematic diagram of an electrical system and an electric machine according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mechanical transmission system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a mechanical transmission system according to an embodiment of the present invention;
fig. 4 is a schematic view of a transmission structure of a rotary fully parallel shaft of an electric shovel according to an embodiment of the present invention;
fig. 5 is a schematic view of the transmission of the rotary parallel shaft and the planetary reducer of the electric shovel according to the embodiment of the present invention.
Description of reference numerals:
1-a high voltage current collector; 2-high voltage load switch; 3-an isolating switch; 4-a main contactor; 5-a main transformer; 6-a rectification feedback unit; 7-a common dc bus; 8-frequency conversion-inverter; 9-motor, 901-output shaft; 10-a brake; 11-a rotary speed reducer, 1101-a parallel shaft pinion, 1102-a parallel shaft bull gear, 1103-a planetary gear transmission; 12-a rotating platform; 13-a set of rollers; 14-a gear ring; 15-lower frame; 16-a rotating shaft; 17-a gear; 18-a central connecting shaft; 19-parallel axis reducer; 20-rotating the vertical shaft; 21-high speed stage parallel shaft deceleration; 22-low-speed stage planetary stage reduction.
Detailed Description
The electric shovel is the main equipment of open-pit mining, mainly comprises operating device, system of getting on the bus and system of getting off the bus, and wherein the system of getting on the bus mainly contains rotary platform and rotary drive system, plays to rise system, weight box, ventilation dust removal, canopy and electrical accessories etc. to operating device installs on rotary platform. The slewing system can realize 360-degree full slewing of the platform and the upper mounting part, can realize reliable braking in emergency, and is one of necessary systems for the electric shovel to realize excavation and loading and unloading operations.
The electric shovel rotation driving system mainly has the following forms: a generator-motor DC speed regulating system, a silicon controlled DC voltage and speed regulating system and an AC frequency conversion speed regulating system. The alternating current variable frequency speed control system has the advantages of advanced technology, high efficiency, energy conservation, low failure rate and the like, and gradually becomes the mainstream. At present, the mainstream alternating current variable frequency speed control system mainly has the following two forms: firstly, a rectifying unit and a public direct current bus variable frequency speed regulating system are arranged; and the silicon controlled rectifier rectification feedback unit and the public direct current bus variable frequency speed control system. The ordinary rectification speed regulation performance is good, the reliability is high, but under the working condition of rotary braking, an independent braking unit needs to be designed, electric energy generated by braking is consumed through heating of a resistor, energy feedback cannot be achieved, and the energy consumption is high. The silicon controlled rectifier rectification feedback unit has excellent speed regulation performance, can realize the feedback of braking energy to a power grid, has low energy consumption, but has the condition of inversion failure and interference on the power grid, so an independent inverter bridge loop needs to be designed.
In combination with the transmission of the full parallel shaft speed reducer shown in fig. 4, the transmission of the full parallel shaft speed reducer comprises a motor 9, a parallel shaft speed reducer 19 and a rotary vertical shaft 20, and the transmission of the primary parallel shaft and a planetary speed reducer shown in fig. 5 comprises a motor 9, a rotary vertical shaft 20, a high-speed stage parallel shaft speed reducer 21 and a low-speed stage planetary speed reducer 22. However, the first stage parallel shaft (high speed stage) in the existing parallel shaft + planetary reducer structure is designed in a reducer box body, and a driving motor shaft is connected with an external spline of a reducer input shaft to transmit torque. Because high-speed level is inside the speed reducer casing, the maintenance and the change of high-speed level pinion need take whole speed reducer upper cover apart just can go on to the pinion if the condition such as breakage fracture appears, the piece that drops can cause huge damage to planetary stage transmission, has great risk. In addition, the outer gear ring of the planet stage and the shell of the speed reducer are of an integrated structure at present, so that torsional impact load borne by the speed reducer is transmitted to the shell of the speed reducer in the rotation working process of the electric shovel, the connection between the shells and the connection part of the shell and the rotation platform are greatly impacted, and the connection reliability is reduced. Finally, due to the structural limitation of the speed reducer, when the output end of the planetary stage is connected with the rotary vertical shaft, the planetary stage of the speed reducer must be firstly disassembled to mount and fix the rotary vertical shaft in place, and then the speed reducer is assembled, so that the mounting and dismounting engineering quantity is large, the mounting and dismounting is very complex, and the efficiency is very low.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, an embodiment of the present invention provides a rotary driving mechanism, which includes an electrical system and a mechanical transmission system, wherein the electrical system includes a main transformer 5, two rectification feedback units 6, a common dc bus 7 and a frequency conversion-inverter 8, which are electrically connected in sequence, the mechanical transmission system includes a motor 9, and the frequency conversion-inverter 8 is connected to the motor 9; when the rotary driving mechanism is in an operation working condition, the main transformer 5 is used for providing alternating current, the output end of the main transformer 5 is connected with the two rectification feedback units 6, the rectification feedback units 6 are used for converting the alternating current into direct current, the direct current is suitable for entering the frequency conversion-inverter 8 through the common direct current bus 7, and the frequency conversion-inverter 8 is used for converting the direct current into the alternating current to drive the motor 9; when the rotary driving mechanism is in a rotary braking working condition, the motor 9 is used for providing alternating current, the frequency conversion-inverter 8 is used for converting the alternating current into direct current, the direct current is suitable for entering the two rectification feedback units 6 through the common direct current bus 7, the rectification feedback units 6 are used for converting the direct current into the alternating current and transmitting the alternating current to the main transformer 5, and the main transformer 5 is used for boosting the alternating current and transmitting the alternating current to a power grid.
Specifically, in the present embodiment, the slewing drive mechanism includes an electrical system and a mechanical transmission system, wherein the electrical system includes a main transformer 5, two rectification feedback units 6, a common dc bus 7 and a frequency conversion-inverter 8, which are electrically connected in sequence, the mechanical transmission system includes a motor 9, and the frequency conversion-inverter 8 is connected to the motor 9.
When the rotary driving mechanism is in an operation condition, the main transformer 5 reduces the high-voltage 10kV alternating current to 690V alternating current, two output loops of the main transformer 5 are respectively connected with a master AFE (active front end, which is called a front end because it is located on a power supply line inlet side) and a slave AFE (active front end), the rectified output is 690V direct current, the direct current enters a frequency conversion-inverter 8 through a common direct current bus 7, and the 690V direct current is converted into 690V alternating current through inversion and provided for a motor 9.
When the rotary driving mechanism is in a rotary braking working condition, as shown in fig. 2, the motor 9 is matched with the brake 10 and other components to convert braking force into electric energy, the motor 9 becomes a power generation state and outputs 690V alternating current, at the moment, the inverter 8 is in a rectification state, the 690V alternating current is converted into direct current, the direct current passes through the common direct current bus 7 and can be provided for a lifting, pushing and walking motor to use, and the direct current can also directly enter the rectification feedback unit 6, the two sets of rectification feedback units 6 can ensure that the voltage of the common direct current bus 7 is stable, redundant electric energy can be inverted and boosted by the main transformer 5 and then fed back to a power grid, inversion failure cannot occur, harmonic waves cannot be generated, no influence is caused on the power grid, and the reliability is very high. And a braking resistance unit is not required to be connected in series on the direct current common bus.
In the embodiment, two sets of rectification feedback units are arranged, so that the energy conversion efficiency is improved, and the energy loss is reduced; the motor is provided with a stable power supply under the working condition, the braking force is converted into electric energy through the motor under the rotary braking condition, the energy recycling is realized, and the disturbance to a power grid is not caused during the energy recycling; meanwhile, the condition of inversion failure is not generated, and the state conversion mode of the motor-generator is optimized; the voltage of the common direct current bus circuit is constant and is not influenced by the voltage fluctuation of the power grid.
Optionally, the electrical system further includes a high-voltage current collector 1, a high-voltage load switch 2, an isolation switch 3, and a main contactor 4, which are connected in sequence, the main contactor 4 is connected to the main transformer 5, and the high-voltage current collector 1 is configured to receive the alternating current transmitted by the power grid, and sequentially transmits the alternating current to the main transformer 5 through the high-voltage load switch 2, the isolation switch 3, and the main contactor 4.
Specifically, in this embodiment, as shown in fig. 1, the electrical system further includes a high-voltage current collector 1, a high-voltage load switch 2, an isolating switch 3, and a main contactor 4, which are connected in sequence, wherein a 10kV high-voltage ac power is input through the high-voltage current collector 1, and enters the main transformer 5 after passing through the high-voltage load switch 2, the isolating switch 3, and the main contactor 4, and is then dropped to a 690V ac power through the main transformer 5, and in the slewing braking condition, the redundant electric energy can be inverted through the rectification feedback unit 6 and fed back to the power grid after being boosted by the main transformer 5, so that no inversion failure occurs, no harmonic is generated, no influence is caused on the power grid, and the reliability is high.
In the embodiment, the high-voltage current collector, the high-voltage load switch, the isolating switch and the main contactor are arranged as the switch equipment for the high-voltage current to enter the main transformer, so that the safety of the main transformer is effectively improved.
Optionally, the two rectification feedback units 6 are arranged in parallel, when the rotary driving mechanism is in an operation condition, the common dc bus 7 is a dc output bus of the two rectification feedback units 6, and when the rotary driving mechanism is in a rotary braking condition, the common dc bus 7 is a dc input bus of the two rectification feedback units 6.
Specifically, in this embodiment, referring to fig. 1, two rectification feedback units 6 are arranged in parallel, when the slewing drive mechanism is in the operation condition, the common dc bus 7 is the dc output bus of the two rectification feedback units 6, and when the slewing drive mechanism is in the slewing braking condition, the common dc bus 7 is the dc input bus of the two rectification feedback units 6.
In the embodiment, the two rectification feedback units are arranged in parallel, so that the energy conversion efficiency is improved, and the energy loss is effectively reduced.
Optionally, the inverter-inverter 8 includes an inverter portion, the inverter portion includes a rectification state and an inversion state, the inverter portion is adapted to convert the alternating current provided by the motor 9 into direct current in the rectification state and transmit the direct current to the common direct current bus 7, and the inverter portion is adapted to convert the direct current provided by the common direct current bus 7 into alternating current in the inversion state to drive the motor 9.
Specifically, in the present embodiment, the inverter-inverter 8 includes an inverter portion and an inverter portion, the inverter portion is an ac controller and does not have an inverting and rectifying function, the inverter portion is adapted to convert ac power supplied from the motor 9 into dc power in a rectifying state and transmit the dc power to the common dc bus 7, and the inverter portion is adapted to convert dc power supplied from the common dc bus 7 into ac power in an inverting state to drive the motor 9. The inverter part of the frequency conversion-inverter 8 is used for carrying out alternating current-direct current conversion, so that the normal operation of an electric system and a mechanical transmission system under the working condition and the rotary braking condition is realized.
In the embodiment, the inverter part of the frequency conversion-inverter is used for carrying out alternating current-direct current conversion, so that the normal operation of the electrical system and the mechanical transmission system under the working condition and the rotation braking condition is realized.
Optionally, the mechanical transmission system further includes a brake 10, a rotary speed reducer 11, a rotary platform 12, a roller set 13, a gear ring 14, a lower frame 15, a rotary shaft 16, a gear 17, and a central connecting shaft 18, the motor 9 is connected to the brake 10 and the rotary speed reducer 11, the rotary speed reducer 11 is connected to the rotary platform 12, the rotary platform 12 is connected to the gear ring 14 through the roller set 13, the gear ring 14 is mounted on the lower frame 15, an upper end of the rotary shaft 16 is connected to the rotary speed reducer 11, the gear 17 is engaged with the gear ring 14, and the central connecting shaft 18 is connected to the rotary platform 12, the roller set 13, the gear ring 14, and the lower frame 15.
Specifically, in this embodiment, as shown in fig. 2, the mechanical transmission system further includes a brake 10, a rotary speed reducer 11, a rotary platform 12, a roller set 13, a gear ring 14, a lower frame 15, a rotary shaft 16, a gear 17, and a central connecting shaft 18, the brake 10 is mounted on an upper end of the rotary motor 9, a lower end of the rotary motor 9 is mounted on an upper surface of the rotary speed reducer 11, a lower surface of the rotary speed reducer 11 is mounted on an upper surface of the rotary platform 12, an upper end of the rotary shaft 16 is connected to the rotary speed reducer 11, the rotary shaft 16 passes through the rotary platform 12, another lower end of the rotary shaft 16 is exposed from a lower surface of the rotary platform 12 and is connected to the gear 17, the gear 17 is engaged with the gear ring 14, the rotary platform 12 is connected to the gear ring 14 through the roller set 13, and the gear ring 14 is mounted on an upper surface of the lower frame 15. The rotary platform 12, the roller group 13, the gear ring 14 and the lower frame 15 are connected through a central connecting shaft 18, wherein the rotary platform 12 and the central connecting shaft 18 are connected through a fastener, and the central connecting shaft 18 and the lower frame 15 can rotate relatively. The braking torque of the brake 10 is transmitted to the gear 17 through the motor 9, the rotary speed reducer 11 and the rotary shaft 16, through gear engagement, the braking torque enables the relative motion of the rotary platform 12 and the lower frame 15 to be reduced, the rotary platform 12 and other components mounted on the upper portion of the rotary platform integrally reduce the rotary motion of the lower frame 15, and then braking is achieved, in the rotary braking process, the rotary motor 9 is passively reversed to form a generator, the braking force can be reversed through the generator to convert kinetic energy into electric energy, and recycling of the braking energy is achieved.
When the rotary driving mechanism is in an operation working condition, the motor 9 is driven by an electric system to provide the functions of rotation, lifting, pushing, walking and the like; when the rotary driving mechanism is in a rotary braking working condition, the motor 9 is converted into a generator, braking force is converted into electric energy through the brake 10 and other components, and the recycling of braking energy is realized.
In the embodiment, a mechanical transmission system is arranged to convert the braking force into electric energy, so that the braking energy is recycled.
Optionally, the motor 9 includes an output shaft 901, the slewing reducer 11 includes a parallel-axis pinion 1101 and a parallel-axis gearwheel 1102, the output shaft 901 is connected to the parallel-axis pinion 1101, and the parallel-axis pinion 1101 is meshed with the parallel-axis gearwheel 1102.
Specifically, in the present embodiment, as shown in fig. 3, the motor 9 includes an output shaft 901, the slewing reduction gear 11 includes a parallel-axis pinion 1101 and a parallel-axis bull gear 1102, the output shaft 901 is connected to the parallel-axis pinion 1101, and the parallel-axis pinion 1101 is meshed with the parallel-axis bull gear 1102. The shell of the motor 9 is fixedly connected with the shell of the rotary speed reducer 11 through a fastener, and the power output end of the motor 9 is connected with a parallel shaft pinion 1101 of the rotary speed reducer 11 through a key to transmit driving torque.
In the embodiment, the output shaft of the motor is connected with the parallel shaft pinion, and the parallel shaft pinion is meshed with the parallel shaft gearwheel, so that the power transmission of the motor is realized.
Optionally, the rotary speed reducer 11 further includes a planetary gear train 1103, and an output end of the planetary gear train 1103 is keyed to the rotary shaft 16.
Specifically, in this embodiment, as shown in fig. 3, the rotary speed reducer 11 further includes a planetary gear drive 1103, an output end of the planetary gear drive 1103 is connected to a rotary shaft 16, such as a spline, the rotary shaft 16 is supported by the rotary platform 12 through a bearing, a lower end of the rotary shaft 16 is connected to a gear 17 through a spline, and the gear 17 is limited by an end stop.
When the gear 17 of the rotary speed reducer 11 is maintained, the gear 17 can be taken out by directly removing the rotary motor 9 from the upper part, the whole rotary speed reducer 11 does not need to be disassembled, and the maintenance is very convenient; an oil sump is arranged below the parallel shaft pinion 1101, so that the mechanical structure of the planetary reduction is not influenced even if the gear 17 is damaged and chippings fall off, and the safety is high. The planet level is independent structure, and the moment of torsion of electric shovel gyration in-process can not transmit 11 shells of rotary reducer, has guaranteed security and the reliability that shell and platform are connected. In addition, when the rotating shaft 16 is installed or disassembled, the rotating shaft 16 can be directly pulled out from the lower part only by detaching the gear 17 and the lower end cover from the lower part of the rotating platform 12, and the rotating speed reducer 11 above the rotating platform 12 does not need to be disassembled, so the installation and the maintenance are very convenient.
In the embodiment, the transmission of the torque is realized by arranging the output end of the planetary gear transmission to be connected with the rotary shaft key.
Optionally, the motor 9 is connected with the rotary speed reducer 11 through a fastener, and a power output end of the motor 9 is connected with the parallel shaft pinion 1101 in a key mode.
Specifically, in the present embodiment, as shown in fig. 2 and 3, the motor 9 is connected to the rotary speed reducer 11 by a fastener, and the power output end of the motor 9 is keyed to the parallel shaft pinion 1101, so that torque transmission is realized. The first stage of the rotary speed reducer 11 is in parallel shaft gear transmission, and the second stage and the third stage of the rotary speed reducer 11 are in planetary gear transmission.
In this embodiment, pass through the fastener through setting up motor and rotary reducer and be connected, the power take off end and the parallel axis pinion key-type connection of motor realize the transmission of moment of torsion.
Optionally, the slewing reducer 11 is connected to the slewing platform 12 through a spigot and a flange bolt.
Specifically, in this embodiment, the rotary speed reducer 11 is connected with the rotary platform 12 through the spigot and the flange bolt, so that the connection strength and the matching degree of the rotary speed reducer 11 and the rotary platform 12 are improved, and the operation smoothness of the mechanical transmission system under the working condition and the rotary braking condition is improved.
In this embodiment, pass through tang and flange bolted connection through setting up rotary reducer and rotary platform to improved rotary reducer and rotary platform's joint strength and cooperation degree, be favorable to under operating condition and the gyration braking operating mode mechanical transmission system's the smooth degree of operation promotion.
Another embodiment of the present invention provides a construction apparatus, comprising a plurality of rotary driving mechanisms as described above. The construction equipment has the same advantages as the rotary driving mechanism compared with the prior art, and the detailed description is omitted.
Optionally, any one of the slewing drive mechanisms includes one motor 9, and a plurality of the motors 9 are mechanically coupled.
Specifically, in the present embodiment, the mechanical transmission system of the multiple rotary driving mechanisms includes multiple motors 9, the motors 9 are mechanically coupled, for example, during the operation, there is mechanical coupling between two rotary motors, and the frequency conversion-inverter 8 adopts a torque master-slave control, mainly uses a torque control and secondarily uses a speed control, so as to improve the operation efficiency. The mechanical coupling means a measure that two or more motors 9 depend on each other, and is usually represented by the degree of association of gear meshing transmission and the like.
In this embodiment, through setting up mechanical coupling between the motor, promote the operating efficiency.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, which will fall into the scope of the present disclosure.
Claims (10)
1. A rotary driving mechanism is characterized by comprising an electrical system and a mechanical transmission system, wherein the electrical system comprises a main transformer (5), two rectification feedback units (6), a common direct current bus (7) and a frequency conversion-inverter (8) which are sequentially and electrically connected, the mechanical transmission system comprises a motor (9), and the frequency conversion-inverter (8) is connected with the motor (9);
when the rotary driving mechanism is in an operation working condition, the main transformer (5) is used for providing alternating current, the output end of the main transformer (5) is connected with the two rectification feedback units (6), the rectification feedback units (6) are used for converting the alternating current into direct current, the direct current is suitable for entering the frequency conversion-inverter (8) through the common direct current bus (7), and the frequency conversion-inverter (8) is used for converting the direct current into the alternating current to drive the motor (9);
when the rotary driving mechanism is in a rotary braking working condition, the motor (9) is used for providing alternating current, the frequency conversion-inverter (8) is used for converting the alternating current into direct current, the direct current is suitable for entering the two rectification feedback units (6) through the common direct current bus (7), the rectification feedback units (6) are used for converting the direct current into the alternating current and transmitting the alternating current to the main transformer (5), and the main transformer (5) is used for boosting the alternating current and transmitting the alternating current to a power grid.
2. The slewing drive mechanism according to claim 1, characterized in that the electrical system further comprises a high-voltage current collector (1), a high-voltage load switch (2), a disconnector (3) and a main contactor (4) connected in sequence, wherein the main contactor (4) is connected to the main transformer (5), and the high-voltage current collector (1) is configured to receive the alternating current transmitted by the power grid and transmit the alternating current to the main transformer (5) through the high-voltage load switch (2), the disconnector (3) and the main contactor (4) in sequence.
3. The swing drive mechanism according to claim 1, wherein two of the rectifying feedback units (6) are arranged in parallel, and when the swing drive mechanism is in the operating condition, the common dc bus (7) is a dc output bus of the two rectifying feedback units (6), and when the swing drive mechanism is in the swing braking condition, the common dc bus (7) is a dc input bus of the two rectifying feedback units (6).
4. The swing drive mechanism according to claim 1, wherein the inverter-inverter (8) comprises an inverter portion comprising a rectifying state and an inverting state, the inverter portion being adapted to convert alternating current provided by the electric motor (9) into direct current and to transmit the direct current to the common direct current bus (7) in the rectifying state, the inverter portion being adapted to convert direct current provided by the common direct current bus (7) into alternating current to drive the electric motor (9) in the inverting state.
5. The swing drive mechanism according to claim 1, wherein the mechanical transmission system further comprises a brake (10), a swing reducer (11), a swing platform (12), a roller set (13), a ring gear (14), a lower frame (15), a swing shaft (16), a gear (17), and a central connecting shaft (18), the motor (9) is connected to the brake (10) and the swing reducer (11), the swing reducer (11) is connected to the swing platform (12), the swing platform (12) is connected to the ring gear (14) through the roller set (13), the ring gear (14) is mounted on the lower frame (15), an upper end of the swing shaft (16) is connected to the swing reducer (11), the gear (17) is engaged to the ring gear (14), and the central connecting shaft (18) is connected to the swing platform (12), respectively, The roller group (13), the gear ring (14) and the lower frame (15) are connected.
6. A slewing drive mechanism according to claim 5, characterized in that the motor (9) comprises an output shaft (901), the slewing reducer (11) comprises a parallel-axis pinion (1101) and a parallel-axis gearwheel (1102), the output shaft (901) is connected with the parallel-axis pinion (1101), and the parallel-axis pinion (1101) meshes with the parallel-axis gearwheel (1102).
7. A slewing drive mechanism according to claim 6, characterized in that the slewing reducer (11) further comprises a planetary gear drive (1103), the output of the planetary gear drive (1103) being keyed to the slewing shaft (16).
8. The slewing drive mechanism according to claim 6, characterized in that the motor (9) is connected with the slewing reducer (11) by a fastener, and a power output end of the motor (9) is keyed with the parallel-axis pinion (1101).
9. A construction machine comprising a plurality of slewing drive mechanisms as claimed in any one of claims 1 to 8.
10. Construction equipment according to claim 9, wherein any of said rotary drive mechanisms comprises one motor (9), and a plurality of said motors (9) are mechanically coupled to each other.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022609927.9U CN213879296U (en) | 2020-11-12 | 2020-11-12 | Rotary driving mechanism and construction equipment |
| PCT/CN2020/132095 WO2022099802A1 (en) | 2020-11-12 | 2020-11-27 | Rotary driving mechanism and construction device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022609927.9U CN213879296U (en) | 2020-11-12 | 2020-11-12 | Rotary driving mechanism and construction equipment |
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| CN213879296U true CN213879296U (en) | 2021-08-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271753A (en) * | 2020-11-12 | 2021-01-26 | 中铁工程机械研究设计院有限公司 | Rotary driving mechanism and construction equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112271753A (en) * | 2020-11-12 | 2021-01-26 | 中铁工程机械研究设计院有限公司 | Rotary driving mechanism and construction equipment |
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