WO2015078083A1 - Electric drive system for heading machine and heading machine - Google Patents

Electric drive system for heading machine and heading machine Download PDF

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Publication number
WO2015078083A1
WO2015078083A1 PCT/CN2013/090773 CN2013090773W WO2015078083A1 WO 2015078083 A1 WO2015078083 A1 WO 2015078083A1 CN 2013090773 W CN2013090773 W CN 2013090773W WO 2015078083 A1 WO2015078083 A1 WO 2015078083A1
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WO
WIPO (PCT)
Prior art keywords
cutting motor
converter
controller
transmission system
switch
Prior art date
Application number
PCT/CN2013/090773
Other languages
French (fr)
Chinese (zh)
Inventor
李国锋
李勇斌
夏建民
赵豆
陈建峰
杨伟
Original Assignee
永济新时速电机电器有限责任公司
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Application filed by 永济新时速电机电器有限责任公司 filed Critical 永济新时速电机电器有限责任公司
Publication of WO2015078083A1 publication Critical patent/WO2015078083A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
    • E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/08—Arrangements for controlling the speed or torque of a single motor

Definitions

  • the invention relates to roadheader technology, in particular to an electric drive system and a roadheader. Background technique
  • the roadheader is a machine for cutting straight underground roadways and is widely used in coal mines, tunnels, urban subway tunnels and other fields.
  • the roadheader mainly includes a cutting mechanism, a shipping mechanism, a traveling mechanism, a hydraulic system, an electrical system, and a dust removal spray system.
  • the cutting mechanism includes a cutting head, a gear box and a cutting motor, and the cutting head cuts coal or rock during the rotation process, and is broken and transported by the loading mechanism.
  • the existing cutting motor adopts a power frequency AC motor with two sets of working windings, and the two sets of working windings respectively drive the motor to rotate at a high speed or at a low speed.
  • Each set of working windings is connected to the working power supply through a normally open contact of a set of contacts, and a set of contactors is controlled by the electrical system to be closed, and the corresponding working windings are turned on to operate the power supply to drive the cutting motor to rotate.
  • the two sets of working windings drive the cutting motor at high speed and low speed respectively to accommodate coal or rock of different hardness.
  • the present invention provides an excavation electromechanical transmission system and a roadheader for solving the problem that the existing roadheader adjusts the inflexible speed of the cutting motor to achieve adaptive adjustment of the rotational speed and torque.
  • An embodiment of the present invention provides an electric drive system for tunneling, including a main power supply and a switch, and further includes: a converter, a frequency conversion cutting motor, and a controller;
  • variable frequency cutting motor, the converter and the switch are sequentially connected and connected to the main power source;
  • the converter is further connected to the controller, and is configured to adjust a voltage output by the converter according to a control signal sent by the controller to adjust a rotation speed and a torque of the frequency conversion cutting motor.
  • the rotor core in the variable frequency cutting motor is a silicon steel sheet, and the rotor winding is a copper bar.
  • the insulation structure in the variable frequency cutting motor is made of a material having high dielectric strength.
  • the bearing in the inverter cutting motor is a resin insulated bearing.
  • the converter includes a rectifying circuit, an intermediate direct current circuit, and an inverter circuit which are sequentially connected.
  • the switch comprising a pre-charge switch and a working switch
  • One end of the pre-charge switch is connected to the main power source, and the other end is connected to an input end of the converter;
  • One end of the working switch is connected to the main power source, and the other end is connected to an input end of the converter.
  • the electromechanical transmission system is provided, and the converter is provided with an explosion-proof casing; each of the devices in the converter is an explosion-proof device.
  • the boring electromechanical transmission system as described above further includes a voltage sensor and/or a current sensor; the probe of the voltage sensor is connected to the input end of the frequency conversion cutting motor, the signal output end of the voltage sensor and the control Connected to detect the voltage of the input end of the variable frequency cutting motor and send it to the controller;
  • a probe of the current sensor is serially connected to an input end of the variable frequency cutting motor, and a signal output end of the current sensor is connected to the controller for detecting a current of an input end of the frequency conversion cutting motor, and transmitting Give the controller.
  • the boring electromechanical transmission system as described above further includes a RC absorption circuit
  • the RC absorption circuit is coupled to the input end of the variable frequency cutting motor for absorbing the reverse potential generated by the variable frequency cutting motor at the moment of power failure.
  • Embodiments of the present invention also provide a roadheader including the tunneling electromechanical transmission system as described above.
  • the driving electromechanical transmission system and the roadheading machine provided by the embodiment of the invention can adjust the rotation speed and the torque of the frequency conversion cutting motor by using the converter, and can adaptively adjust the rotation speed and the torque according to the change of the load, thereby achieving smooth adjustment to adapt to different Hardness of coal or a delayed cutting process.
  • the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed and constant power operation, and effectively improve the efficiency of the tunneling operation.
  • FIG. 1 is a schematic structural view 1 of an excavation electromechanical transmission system according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view 2 of an excavation electromechanical transmission system according to an embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram 1 of an excavation electromechanical transmission system according to the present invention.
  • FIG. 2 is a schematic structural diagram 2 of an excavation electromechanical transmission system according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the embodiment provides an excavation.
  • the electromechanical transmission system includes a main power source 1 and a switch 2, and further includes: a converter 3, a frequency conversion cutting motor 4, and a controller 5. Among them, the frequency conversion cutting motor 4, the converter 3 and the switch 2 are sequentially connected and connected to the main power source 1.
  • the converter 3 is connected to the controller 5 for adjusting the voltage output from the converter 3 in accordance with a control signal from the controller 5 to adjust the speed and torque of the inverter motor 4.
  • the tunneling electromechanical transmission system provided in this embodiment can be installed in the roadheader and is suitable for the fields of coal mining, tunnel excavation and the like.
  • its main power supply 1 usually receives 1140V three-phase alternating current, and an isolating switch is provided at the output end of the main power supply 1. When the isolating switch is closed, each device in the electric drive system receives power from the main power supply 1, when isolated When the switch is turned off, each device is powered off.
  • the converter 3 can adopt a converter commonly used in the prior art, for example, a rectifier circuit, an intermediate DC circuit and an inverter circuit which are sequentially connected, wherein the input end of the rectifier circuit is connected to the main power source 1 through the switch 2, Convert the input three-phase AC power into DC power.
  • the rectifier circuit can be a controllable rectifier circuit or an uncontrolled rectifier circuit.
  • the output end of the rectifier circuit is connected to the intermediate DC circuit, and the intermediate DC circuit is also connected to the input end of the inverter circuit.
  • the inverter circuit is used to convert the DC power into three-phase AC power, and adjust the voltage amplitude and frequency of the three-phase AC power.
  • the output end of the inverter circuit is connected to the winding of the inverter cutting motor 4, and the output of the inverter circuit is not
  • the three-phase alternating current with the same voltage amplitude and frequency can drive the variable frequency cutting motor 4 to rotate at the corresponding rotational speed.
  • the switch 2 may include a precharge switch 21 and a work switch 22.
  • one end of the pre-charge switch 21 is connected to the main power source 1, and the other end is connected to the input end of the converter 3, specifically connected to the input end of the rectifier circuit, and can be used to pass through the rectifier circuit to the middle when the pre-charge switch 21 is closed
  • the DC circuit is precharged.
  • one end of the working switch 22 is connected to the main power source 1, and the other end is connected to the input end of the converter 3, specifically connected to the input end of the rectifying circuit, and when the working switch 22 is closed, the rectifying circuit is powered.
  • the controller 5 can be connected to the converter 3, specifically to the driving end of each switching device in the inverter circuit, and the controller 5 issues pulse signals of different duty ratios, and controls each switching device to be turned on and off as a control signal. , to adjust the amplitude and frequency of the output voltage of the inverter circuit. If the rectifying circuit selects a controllable rectifying circuit, the controller 5 is also connected to the driving end of the switching device in the rectifying circuit for controlling the rectifying circuit to convert the alternating current into direct current.
  • the controller 5 can also be connected to the switch 2, and the controller 5 can issue a control signal for controlling the switch 2 to be closed or opened.
  • the coil of the precharge switch 21 is connected to the controller 5, and the normally open contact of the precharge switch 21 is connected to the input terminal of the rectifier circuit.
  • the pre-charge switch 21 can be a common circuit breaker having two pairs of normally-open contacts that operate synchronously. One end of a pair of normally-open contacts is connected to one of the main power sources 1 and the other end is connected to one end of the input end of the rectifier circuit. Connected, one end of the other pair of normally open contacts is connected to the other of the main power source 1, and the other end is connected to the other end of the input end of the rectifier circuit.
  • the controller 5 outputs an electrical signal and forms a closed loop with the coil of the precharge switch 21, the coil of the precharge switch 21 is energized such that the two pairs of normally open contacts of the precharge switch 21 are closed to charge the intermediate DC circuit.
  • the coil of the work switch 22 is connected to the controller 5, and the normally open contact of the work switch 22 is connected to the main power source 1 and the input terminal of the rectifier circuit.
  • the working switch 22 can be a vacuum circuit breaker having three pairs of normally-open contacts that are synchronously operated. One end of the pair of normally-open contacts is connected to one of the main power sources 1 and the other end is connected to one input end of the rectifier circuit. The two pairs of normally open contacts are respectively connected to the remaining two phases of the main power source 1 and the remaining two inputs of the rectifier circuit.
  • the excavating electromechanical transmission system includes the above-mentioned variable frequency cutting motor 4 provided by the embodiment, and further includes an oil pump motor, a second motor and a dust removing motor, which are respectively connected to the main power source 1 through a vacuum contactor, and receive power from the main power source 1 respectively. .
  • the oil pump motor, the second motor and the dust removing motor can be used as power frequency motors commonly used in the prior art.
  • the main power supply 1 of the excavation electromechanical transmission system receives 1140V AC power, and distributes four outputs through the switch box.
  • One of the channels is supplied to the inverter cutting motor 4 through the converter 3 output 260KW AC, and the other three channels are power frequency output, respectively supplied to the oil pump.
  • Motor, second motor and dust removal motor are supplied to the oil pump.
  • the cutting motor for realizing the digging function uses the variable frequency cutting motor 4 provided in this embodiment, and adjusts the rotation speed and torque of the inverter cutting motor 4 according to the voltage output from the converter 3.
  • the frequency conversion cutting motor 4 can adopt a motor with strong anti-harmonic capability and high insulation strength in the prior art, or can also improve the ordinary power frequency motor, so that it has strong anti-harmonic capability and high. The insulation strength.
  • the motor Since the harmonics of the output voltage signal of the inverter 3 are large, in order to keep the motor speed stable, the motor needs to be improved.
  • the rotor core of the inverter cutting motor 4 can be set as a silicon steel sheet, and the rotor winding is copper.
  • the guide bar, the way in which the copper bar is embedded on the silicon steel sheet enables the variable frequency cutting motor 4 to withstand large harmonic signals.
  • the insulation structure in the motor is made of high dielectric strength materials commonly used in the prior art to enhance the insulation performance and avoid high voltage breakdown.
  • the bearings in the motor are made of resin-insulated bearings, which further enhance the insulation performance.
  • the stator coils in the motor can be bent by copper bars.
  • the frequency conversion cutting motor 4 can directly adopt the frequency conversion speed regulating motor commonly used in the prior art, and the rotor winding is connected with the output end of the converter 3, and the rotation speed and torque of the motor are adjusted according to the voltage outputted by the converter 3.
  • the working process of the above-mentioned tunneling electromechanical transmission system is: when the heading head reaches the working position, the controller 5 controls the pre-charging switch 21 to close, first charging the intermediate DC circuit in the converter 3, when the current of the intermediate DC circuit reaches the setting At the time of the value, the controller 5 controls the operation switch 22 to be closed, and the rectifier circuit converts the three-phase alternating current supplied from the main power source 1 into direct current.
  • the inverter circuit receives the pulse signal from the controller 5, converts the direct current into three-phase alternating current, and adjusts the voltage amplitude and frequency of the three-phase alternating current.
  • the frequency conversion cutting motor 4 receives the three-phase alternating current outputted by the inverter circuit, and outputs corresponding speed and torque according to different voltage amplitudes and frequencies to drive the head movement.
  • the controller 5 knows that the rotation speed of the inverter cutting motor 4 is decreased, the duty ratio of the output pulse signal can be adjusted to change the switching frequency of the switching device in the inverter circuit, and adjust the amplitude and frequency of the output voltage of the inverter circuit to Reduce the speed of the inverter cutting motor 4 and keep the torque constant. If the texture of the coal or rock is soft, the controller 5 can control the variable frequency cutting motor 4 to rotate at a constant power at a high speed to achieve rapid cutting.
  • the technical solution provided by the embodiment adjusts the rotation speed and the torque of the variable frequency cutting motor by using the converter, and can adaptively adjust the rotation speed and the torque according to the change of the load, thereby achieving smooth adjustment to adapt to coal of different hardness or delay.
  • the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed constant power operation, and effectively improve the efficiency of the tunneling operation.
  • the tunneling electromechanical transmission system may further comprise a line detecting device for implementing overcurrent, overload, phase failure and leakage detection of each motor, and protecting against overvoltage and undervoltage of the power source.
  • the line detecting device may specifically include a voltage sensor 6 and/or a current sensor (not shown).
  • the probe of the voltage sensor is connected to the input end of the frequency conversion cutting motor 4, and the signal output end of the voltage sensor is connected with the controller 5 for detecting the voltage of the input end of the frequency conversion cutting motor 4, And sent to the controller 5.
  • the probe of the current sensor 6 is connected in series to the input end of the variable frequency cutting motor 4, and the signal output end of the current sensor 6 is connected to the controller 5 for detecting the current of the input terminal of the inverter cutting motor 4 and transmitting it to the controller 5.
  • the controller 5 can obtain the state of the input voltage of each motor through the voltage sensor and /current sensor 6. If an overcurrent or overload phenomenon occurs, the controller 5 can timely control the corresponding switch to open to protect each motor.
  • a resistance-capacitance absorbing circuit 7 may be disposed on the input circuit of each motor. Taking the variable-frequency cutting motor 4 as an example, the RC absorption circuit 7 is connected to the input end of the variable-frequency cutting motor 4 for absorbing the frequency-frequency cutting. The reverse potential generated by the motor 4 at the moment of power failure.
  • the RC absorption circuit 7 can be implemented by a circuit which is common in the prior art, and the connection manner can also be realized by referring to the prior art.
  • the controller 5 in the above technical solution may be a Programmable Logic Controller (PLC) commonly used in the field, or a dedicated controller may be independently developed to implement the above functions.
  • PLC Programmable Logic Controller
  • the controller 5 can perform data interaction with an operation panel through a Controller Area Network (CAN) bus, and can receive user commands sent from the operation panel, and can also send data to the operation panel for display, which is good. Human-computer interaction capabilities. If applied to coal mining, the controller 5 and the operation panel should also have anti-explosion capability and good seismic resistance, which is suitable for long-term bad work.
  • CAN Controller Area Network
  • the embodiment further provides a roadheader comprising the tunneling electromechanical transmission system of the above technical solution.
  • the roadheader adopts the excavation electromechanical transmission system provided by the above technical solution.
  • the converter By adopting the converter to adjust the speed and torque of the variable frequency cutting motor, the speed and torque can be adaptively adjusted according to the change of the load, so as to achieve smooth adjustment to adapt to different Hardness of coal or a delayed cutting process.
  • the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed and constant power operation, and effectively improve the efficiency of the tunneling operation.
  • each of these devices is set to have an explosion-proof function, which can be applied to the field of coal mining, and achieve maximum protection of personnel and equipment while improving production efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

An electric drive system for a heading machine and a heading machine having same. The electric drive system for the heading machine comprises: a main power supply (1) and a switch (2), as well as a converter (3), a variable-frequency cutting motor (4) and a controller (5); the variable-frequency cutting motor (4), the converter (3) and the switch (2) are connected in sequence and are also connected to the main power supply (1); the converter (3) is connected with the controller (5), and used for regulating a voltage output by the converter (3) according to the control signal sent by the controller (5), in order to adjust the rotating speed and torque of the variable-frequency cutting motor (4). The electric drive system for the heading machine and the heading machine can resolve the problem that the rotating speed of the cutting motors in the existing heading machines cannot be flexibly adjusted, thus realizing adaptive adjustment for rotating speed.

Description

掘进机电传动***及掘进  Excavating electromechanical transmission system and excavation
技术领域 Technical field
本发明涉及掘进机技术， 尤其涉及一种掘进机电传动***及掘进机。 背景技术  The invention relates to roadheader technology, in particular to an electric drive system and a roadheader. Background technique
掘进机是用于开凿平直地下巷道的机器， 广泛用于煤矿、 隧道、 城市 地铁隧道等领域。 掘进机主要包括切割机构、 装运机构、 行走机构、 液压 ***、 电气***以及除尘喷雾***。 其中， 切割机构包括切割头、 齿轮箱 和截割电机， 切割头在旋转的过程中切割煤炭或岩石， 使其破碎后通过装 运机构运输出去。  The roadheader is a machine for cutting straight underground roadways and is widely used in coal mines, tunnels, urban subway tunnels and other fields. The roadheader mainly includes a cutting mechanism, a shipping mechanism, a traveling mechanism, a hydraulic system, an electrical system, and a dust removal spray system. Among them, the cutting mechanism includes a cutting head, a gear box and a cutting motor, and the cutting head cuts coal or rock during the rotation process, and is broken and transported by the loading mechanism.
现有的截割电机采用具有两组工作绕组的工频交流电机，两组工作绕 组通电后分别驱动电机高速转动或低速转动。每组工作绕组通过一组接触 器的常开触点接至工作电源， 由电气***控制一组接触器闭合， 则对应的 工作绕组接通工作电源驱动截割电机转动。两组工作绕组分别驱动截割电 机高速和低速转动， 以适应不同硬度的煤炭或岩石。  The existing cutting motor adopts a power frequency AC motor with two sets of working windings, and the two sets of working windings respectively drive the motor to rotate at a high speed or at a low speed. Each set of working windings is connected to the working power supply through a normally open contact of a set of contacts, and a set of contactors is controlled by the electrical system to be closed, and the corresponding working windings are turned on to operate the power supply to drive the cutting motor to rotate. The two sets of working windings drive the cutting motor at high speed and low speed respectively to accommodate coal or rock of different hardness.
当截割电机高速旋转时， 若遇到较坚硬的煤炭或岩石， 切割头受到较 大的阻力停止转动， 但截割电机仍输出转矩， 导致了截割电机堵转， 则需 通过切换接触器闭合的方式断开高速工作绕组的电源，接通低速工作绕组 的电源， 将截割电机切换至低速旋转工作模式， 以继续切割。 因此， 现有 的掘进机调节截割电机转速的方式不灵活， 直接影响了切割的进度， 而且 还降低了截割电机的机械强度， 缩短了掘进机的使用寿命。 发明内容 本发明提供一种掘进机电传动***及掘进机， 用于解决现有的掘进机 调节截割电机转速不灵活的问题， 以实现自适应调节转速和转矩。  When the cutting motor rotates at a high speed, if the hard coal or rock is encountered, the cutting head is subjected to a large resistance to stop the rotation, but the cutting motor still outputs the torque, which causes the cutting motor to stall, and then needs to be switched. The device is closed to disconnect the power of the high speed working winding, turn on the power of the low speed working winding, and switch the cutting motor to the low speed rotating mode to continue cutting. Therefore, the existing roadheader adjusts the speed of the cutting motor inflexibly, which directly affects the cutting progress, and also reduces the mechanical strength of the cutting motor and shortens the service life of the roadheader. SUMMARY OF THE INVENTION The present invention provides an excavation electromechanical transmission system and a roadheader for solving the problem that the existing roadheader adjusts the inflexible speed of the cutting motor to achieve adaptive adjustment of the rotational speed and torque.
本发明实施例提供一种掘进机电传动***， 包括主电源和开关， 还包 括： 变流器、 变频截割电机和控制器；  An embodiment of the present invention provides an electric drive system for tunneling, including a main power supply and a switch, and further includes: a converter, a frequency conversion cutting motor, and a controller;
所述变频截割电机、 变流器和开关依次连接， 并连接至所述主电源； 所述变流器还与所述控制器连接， 用于根据所述控制器发出的控制信 号调节所述变流器输出的电压， 以调整所述变频截割电机的转速和转矩。 The variable frequency cutting motor, the converter and the switch are sequentially connected and connected to the main power source; The converter is further connected to the controller, and is configured to adjust a voltage output by the converter according to a control signal sent by the controller to adjust a rotation speed and a torque of the frequency conversion cutting motor.
如上所述的掘进机电传动***， 所述变频截割电机中的转子铁芯为硅 钢片， 转子绕组为铜导条。  In the electromechanical transmission system as described above, the rotor core in the variable frequency cutting motor is a silicon steel sheet, and the rotor winding is a copper bar.
如上所述的掘进机电传动***， 所述变频截割电机中的绝缘结构采用 高绝缘强度材料制成。  In the boring electromechanical transmission system as described above, the insulation structure in the variable frequency cutting motor is made of a material having high dielectric strength.
如上所述的掘进机电传动***， 所述变频截割电机中的轴承为树脂绝 缘轴承。  In the tunneling electromechanical transmission system as described above, the bearing in the inverter cutting motor is a resin insulated bearing.
如上所述的掘进机电传动***， 所述变流器包括依次连接的整流电 路、 中间直流电路和逆变电路。  The boring electromechanical transmission system as described above, the converter includes a rectifying circuit, an intermediate direct current circuit, and an inverter circuit which are sequentially connected.
如上所述的掘进机电传动***， 所述开关包括预充电开关和工作开 关；  Excavating an electromechanical transmission system as described above, the switch comprising a pre-charge switch and a working switch;
所述预充电开关的一端连接至所述主电源， 另一端连接至所述变流器 的输入端；  One end of the pre-charge switch is connected to the main power source, and the other end is connected to an input end of the converter;
所述工作开关的一端连接至所述主电源， 另一端连接至所述变流器的 输入端。  One end of the working switch is connected to the main power source, and the other end is connected to an input end of the converter.
如上所述的掘进机电传动***， 所述变流器设置有防爆外壳； 所述变流器中的各器件均采用防爆器件。  As described above, the electromechanical transmission system is provided, and the converter is provided with an explosion-proof casing; each of the devices in the converter is an explosion-proof device.
如上所述的掘进机电传动***， 还包括电压传感器和 /或电流传感器； 所述电压传感器的探头并接在所述变频截割电机的输入端， 所述电压 传感器的信号输出端与所述控制器连接， 用于检测所述变频截割电机的输 入端的电压， 并发送给所述控制器；  The boring electromechanical transmission system as described above further includes a voltage sensor and/or a current sensor; the probe of the voltage sensor is connected to the input end of the frequency conversion cutting motor, the signal output end of the voltage sensor and the control Connected to detect the voltage of the input end of the variable frequency cutting motor and send it to the controller;
所述电流传感器的探头串接在所述变频截割电机的输入端， 所述电流 传感器的信号输出端与所述控制器连接， 用于检测所述变频截割电机的输 入端的电流， 并发送给所述控制器。  a probe of the current sensor is serially connected to an input end of the variable frequency cutting motor, and a signal output end of the current sensor is connected to the controller for detecting a current of an input end of the frequency conversion cutting motor, and transmitting Give the controller.
如上所述的掘进机电传动***， 还包括阻容吸收电路；  The boring electromechanical transmission system as described above further includes a RC absorption circuit;
所述阻容吸收电路连接在所述变频截割电机的输入端， 用于吸收所述 变频截割电机在断电瞬间产生的反向电势。  The RC absorption circuit is coupled to the input end of the variable frequency cutting motor for absorbing the reverse potential generated by the variable frequency cutting motor at the moment of power failure.
本发明实施例还提供一种掘进机， 包括如上所述的掘进机电传动系 统。 本发明实施例提供的掘进机电传动***和掘进机， 通过采用变流器调 节变频截割电机的转速和转矩， 能根据负载的变化自适应调整转速和转 矩， 实现平滑调节， 以适应不同硬度的煤炭或延时的切割进程。 并且， 本 实施例提供的技术方案具有无级调速、 无切换电流冲击的优点， 其控制方 式较灵活， 能实现低速恒转矩， 高速恒功率运行， 有效地提高了掘进作业 的效率。 附图说明 Embodiments of the present invention also provide a roadheader including the tunneling electromechanical transmission system as described above. The driving electromechanical transmission system and the roadheading machine provided by the embodiment of the invention can adjust the rotation speed and the torque of the frequency conversion cutting motor by using the converter, and can adaptively adjust the rotation speed and the torque according to the change of the load, thereby achieving smooth adjustment to adapt to different Hardness of coal or a delayed cutting process. Moreover, the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed and constant power operation, and effectively improve the efficiency of the tunneling operation. DRAWINGS
图 1为本发明实施例提供的掘进机电传动***的结构示意图一； 图 2为本发明实施例提供的掘进机电传动***的结构示意图二。 具体实施方式  1 is a schematic structural view 1 of an excavation electromechanical transmission system according to an embodiment of the present invention; FIG. 2 is a schematic structural view 2 of an excavation electromechanical transmission system according to an embodiment of the present invention. detailed description
图 1为本发明提供的掘进机电传动***的结构示意图一， 图 2为本发 明实施例提供的掘进机电传动***的结构示意图二， 如图 1和图 2所示， 本实施例提供一种掘进机电传动***， 包括主电源 1和开关 2， 另外还包 括： 变流器 3、 变频截割电机 4和控制器 5。 其中， 变频截割电机 4、 变流 器 3和开关 2依次连接， 并连接至主电源 1。 变流器 3与控制器 5连接， 用于根据控制器 5发出的控制信号调节变流器 3输出的电压， 以调整变频 截割电机 4的转速和转矩。  1 is a schematic structural diagram 1 of an excavation electromechanical transmission system according to the present invention. FIG. 2 is a schematic structural diagram 2 of an excavation electromechanical transmission system according to an embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the embodiment provides an excavation. The electromechanical transmission system includes a main power source 1 and a switch 2, and further includes: a converter 3, a frequency conversion cutting motor 4, and a controller 5. Among them, the frequency conversion cutting motor 4, the converter 3 and the switch 2 are sequentially connected and connected to the main power source 1. The converter 3 is connected to the controller 5 for adjusting the voltage output from the converter 3 in accordance with a control signal from the controller 5 to adjust the speed and torque of the inverter motor 4.
本实施例提供的掘进机电传动***可设置在掘进机中， 适用于煤矿挖 掘、 隧道挖掘等领域。 对于掘进机而言， 其主电源 1通常接收 1140V三相 交流电， 在主电源 1的输出端设置隔离开关， 当隔离开关闭合时， 电传动 ***中的各器件从主电源 1获电， 当隔离开关断开时， 各器件断电。  The tunneling electromechanical transmission system provided in this embodiment can be installed in the roadheader and is suitable for the fields of coal mining, tunnel excavation and the like. For the roadheader, its main power supply 1 usually receives 1140V three-phase alternating current, and an isolating switch is provided at the output end of the main power supply 1. When the isolating switch is closed, each device in the electric drive system receives power from the main power supply 1, when isolated When the switch is turned off, each device is powered off.
变流器 3可采用现有技术中常用的变流器， 例如可包括依次连接的整 流电路、 中间直流电路和逆变电路， 其中， 整流电路的输入端通过开关 2 连接至主电源 1， 用于将输入的三相交流电转换成直流电。 整流电路可以 采用可控整流电路， 也可以采用不可控整流电路。 整流电路的输出端与中 间直流电路连接， 中间直流电路还与逆变电路的输入端连接， 逆变电路用 于将直流电再转换为三相交流电， 并且调整三相交流电的电压幅值和频 率。 逆变电路的输出端与变频截割电机 4的绕组连接， 逆变电路输出的不 同电压幅值和频率的三相交流电能够驱动变频截割电机 4以对应的转速转 动。 The converter 3 can adopt a converter commonly used in the prior art, for example, a rectifier circuit, an intermediate DC circuit and an inverter circuit which are sequentially connected, wherein the input end of the rectifier circuit is connected to the main power source 1 through the switch 2, Convert the input three-phase AC power into DC power. The rectifier circuit can be a controllable rectifier circuit or an uncontrolled rectifier circuit. The output end of the rectifier circuit is connected to the intermediate DC circuit, and the intermediate DC circuit is also connected to the input end of the inverter circuit. The inverter circuit is used to convert the DC power into three-phase AC power, and adjust the voltage amplitude and frequency of the three-phase AC power. The output end of the inverter circuit is connected to the winding of the inverter cutting motor 4, and the output of the inverter circuit is not The three-phase alternating current with the same voltage amplitude and frequency can drive the variable frequency cutting motor 4 to rotate at the corresponding rotational speed.
对应于上述采用中间直流电路的变流器 3而言， 开关 2可以包括预充 电开关 21和工作开关 22。 其中， 预充电开关 21的一端连接至主电源 1， 另一端连接至变流器 3的输入端， 具体可连接至整流电路的输入端， 当预 充电开关 21闭合时可用于通过整流电路向中间直流电路进行预充电。 另 夕卜，工作开关 22的一端连接至主电源 1，另一端连接至变流器 3的输入端， 具体可连接至整流电路的输入端， 当工作开关 22闭合时， 整流电路受电。  Corresponding to the above-described converter 3 employing an intermediate DC circuit, the switch 2 may include a precharge switch 21 and a work switch 22. Wherein, one end of the pre-charge switch 21 is connected to the main power source 1, and the other end is connected to the input end of the converter 3, specifically connected to the input end of the rectifier circuit, and can be used to pass through the rectifier circuit to the middle when the pre-charge switch 21 is closed The DC circuit is precharged. In addition, one end of the working switch 22 is connected to the main power source 1, and the other end is connected to the input end of the converter 3, specifically connected to the input end of the rectifying circuit, and when the working switch 22 is closed, the rectifying circuit is powered.
控制器 5—方面可以与变流器 3连接， 具体可连接至逆变电路中各开 关器件的驱动端， 控制器 5发出不同占空比的脉冲信号， 作为控制信号控 制各开关器件实现通断， 以调节逆变电路输出电压的幅值和频率。 若整流 电路选用可控整流电路， 则控制器 5还与整流电路中的开关器件的驱动端 连接， 用于控制整流电路将交流电转换为直流电。  The controller 5 can be connected to the converter 3, specifically to the driving end of each switching device in the inverter circuit, and the controller 5 issues pulse signals of different duty ratios, and controls each switching device to be turned on and off as a control signal. , to adjust the amplitude and frequency of the output voltage of the inverter circuit. If the rectifying circuit selects a controllable rectifying circuit, the controller 5 is also connected to the driving end of the switching device in the rectifying circuit for controlling the rectifying circuit to convert the alternating current into direct current.
另一方面，控制器 5还可以与开关 2连接，控制器 5可发出控制信号， 用于控制开关 2闭合或断开。 例如， 预充电开关 21的线圈与控制器 5连 接， 预充电开关 21的常开触点与整流电路的输入端连接。 预充电开关 21 可以为常用断路器， 具有两对同步动作的常开触点， 一对常开触点的一端 与主电源 1中的一相连接， 另一端与整流电路的输入端中的一端连接， 另 一对常开触点的一端与主电源 1中的另一相连接， 另一端与整流电路的输 入端中的另一端连接。 当控制器 5输出电信号并且与预充电开关 21的线 圈形成闭合回路时， 预充电开关 21的线圈得电， 使得预充电开关 21的两 对常开触点闭合， 向中间直流电路充电。  On the other hand, the controller 5 can also be connected to the switch 2, and the controller 5 can issue a control signal for controlling the switch 2 to be closed or opened. For example, the coil of the precharge switch 21 is connected to the controller 5, and the normally open contact of the precharge switch 21 is connected to the input terminal of the rectifier circuit. The pre-charge switch 21 can be a common circuit breaker having two pairs of normally-open contacts that operate synchronously. One end of a pair of normally-open contacts is connected to one of the main power sources 1 and the other end is connected to one end of the input end of the rectifier circuit. Connected, one end of the other pair of normally open contacts is connected to the other of the main power source 1, and the other end is connected to the other end of the input end of the rectifier circuit. When the controller 5 outputs an electrical signal and forms a closed loop with the coil of the precharge switch 21, the coil of the precharge switch 21 is energized such that the two pairs of normally open contacts of the precharge switch 21 are closed to charge the intermediate DC circuit.
又例如， 工作开关 22的线圈与控制器 5连接， 工作开关 22的常开触 点与主电源 1和整流电路的输入端连接。工作开关 22可以为真空断路器， 具有三对同步动作的常开触点， 一对常开触点的一端与主电源 1中的一相 连接， 另一端与整流电路的一个输入端连接， 另外两对常开触点分别与主 电源 1中的其余两相和整流电路的其余两个输入端连接。 当控制器 5输出 电信号并且与工作开关 22的线圈形成闭合回路时， 工作开关 22的线圈得 电， 使得工作开关 22的三个同步常开触点闭合， 向整流电路提供三相交 流电。 掘进机电传动***除了包括本实施例提供的上述变频截割电机 4之 夕卜， 还包括油泵电机、 二运电机和除尘电机， 分别通过真空接触器连接至 主电源 1， 从主电源 1获电。 油泵电机、 二运电机和除尘电机可以为现有 技术常用的工频电机。 掘进机电传动***的主电源 1接收 1140V交流电， 经开关箱分配四路输出， 其中一路通过变流器 3输出 260KW交流电提供 给变频截割电机 4， 其余三路为工频输出， 分别提供给油泵电机、 二运电 机和除尘电机。 For another example, the coil of the work switch 22 is connected to the controller 5, and the normally open contact of the work switch 22 is connected to the main power source 1 and the input terminal of the rectifier circuit. The working switch 22 can be a vacuum circuit breaker having three pairs of normally-open contacts that are synchronously operated. One end of the pair of normally-open contacts is connected to one of the main power sources 1 and the other end is connected to one input end of the rectifier circuit. The two pairs of normally open contacts are respectively connected to the remaining two phases of the main power source 1 and the remaining two inputs of the rectifier circuit. When the controller 5 outputs an electrical signal and forms a closed loop with the coil of the working switch 22, the coil of the working switch 22 is energized such that the three synchronous normally open contacts of the working switch 22 are closed, providing three-phase alternating current to the rectifier circuit. The excavating electromechanical transmission system includes the above-mentioned variable frequency cutting motor 4 provided by the embodiment, and further includes an oil pump motor, a second motor and a dust removing motor, which are respectively connected to the main power source 1 through a vacuum contactor, and receive power from the main power source 1 respectively. . The oil pump motor, the second motor and the dust removing motor can be used as power frequency motors commonly used in the prior art. The main power supply 1 of the excavation electromechanical transmission system receives 1140V AC power, and distributes four outputs through the switch box. One of the channels is supplied to the inverter cutting motor 4 through the converter 3 output 260KW AC, and the other three channels are power frequency output, respectively supplied to the oil pump. Motor, second motor and dust removal motor.
而用于实现挖掘功能的截割电机则采用本实施例提供的变频截割电 机 4， 根据变流器 3输出的电压调节变频截割电机 4的转速和转矩。 变频 截割电机 4可采用现有技术中抗谐波能力较强且绝缘强度较高的电机， 或 者也可以对普通的工频电机进行改进， 使其具有较强的抗谐波能力和较高 的绝缘强度。  The cutting motor for realizing the digging function uses the variable frequency cutting motor 4 provided in this embodiment, and adjusts the rotation speed and torque of the inverter cutting motor 4 according to the voltage output from the converter 3. The frequency conversion cutting motor 4 can adopt a motor with strong anti-harmonic capability and high insulation strength in the prior art, or can also improve the ordinary power frequency motor, so that it has strong anti-harmonic capability and high. The insulation strength.
由于变频器 3输出电压信号的谐波较大， 因此， 为了使电机转速保持 平稳， 需对电机进行改进， 例如： 变频截割电机 4中的转子铁芯可以设置 为硅钢片， 转子绕组为铜导条， 将铜导条镶嵌在硅钢片上的方式使得变频 截割电机 4能够抵抗较大的谐波信号。  Since the harmonics of the output voltage signal of the inverter 3 are large, in order to keep the motor speed stable, the motor needs to be improved. For example, the rotor core of the inverter cutting motor 4 can be set as a silicon steel sheet, and the rotor winding is copper. The guide bar, the way in which the copper bar is embedded on the silicon steel sheet enables the variable frequency cutting motor 4 to withstand large harmonic signals.
另外， 对于电机中的绝缘结构， 都采用现有技术中常用的高绝缘强度 材料制成， 以增强绝缘性能， 避免高压击穿现象发生。 电机中的轴承采用 树脂绝缘轴承， 也能够进一步增强绝缘性能。 电机中的定子线圈可以采用 铜排弯绕而成。  In addition, the insulation structure in the motor is made of high dielectric strength materials commonly used in the prior art to enhance the insulation performance and avoid high voltage breakdown. The bearings in the motor are made of resin-insulated bearings, which further enhance the insulation performance. The stator coils in the motor can be bent by copper bars.
或者变频截割电机 4可以直接采用现有技术中常用的变频调速电机， 其转子绕组与变流器 3的输出端连接， 根据变流器 3输出的电压调节电机 的转速和转矩。  Or the frequency conversion cutting motor 4 can directly adopt the frequency conversion speed regulating motor commonly used in the prior art, and the rotor winding is connected with the output end of the converter 3, and the rotation speed and torque of the motor are adjusted according to the voltage outputted by the converter 3.
上述掘进机电传动***的工作过程为： 当掘进头到达工作位置时， 控 制器 5控制预充电开关 21闭合， 首先给变流器 3中的中间直流电路充电， 当中间直流电路的电流达到设定值时， 控制器 5控制工作开关 22闭合， 整流电路将主电源 1提供的三相交流电转换为直流电。逆变电路接收控制 器 5发出的脉冲信号， 将直流电转换为三相交流电， 并且调节三相交流电 的电压幅值和频率。 变频截割电机 4接收逆变电路输出的三相交流电， 根 据不同的电压幅值和频率输出对应的转速和转矩， 带动掘进头转动。 掘进头在转动的过程中， 若遇到较坚硬的煤炭或岩石时， 掘进头的转 动收到较大的阻力， 相应的变频截割电机 4的转速下降， 但转矩不变。 控 制器 5获知变频截割电机 4的转速下降时，可调节输出脉冲信号的占空比， 以改变逆变电路中开关器件的通断频率， 调节逆变电路输出电压的幅值和 频率， 以降低变频截割电机 4的转速， 并保持转矩不变。 若煤炭或岩石的 质地较软， 控制器 5可控制变频截割电机 4以恒定功率高速转动， 实现快 速切割。 The working process of the above-mentioned tunneling electromechanical transmission system is: when the heading head reaches the working position, the controller 5 controls the pre-charging switch 21 to close, first charging the intermediate DC circuit in the converter 3, when the current of the intermediate DC circuit reaches the setting At the time of the value, the controller 5 controls the operation switch 22 to be closed, and the rectifier circuit converts the three-phase alternating current supplied from the main power source 1 into direct current. The inverter circuit receives the pulse signal from the controller 5, converts the direct current into three-phase alternating current, and adjusts the voltage amplitude and frequency of the three-phase alternating current. The frequency conversion cutting motor 4 receives the three-phase alternating current outputted by the inverter circuit, and outputs corresponding speed and torque according to different voltage amplitudes and frequencies to drive the head movement. During the process of turning in the head, if the hard coal or rock is encountered, the rotation of the head will receive a large resistance, and the rotation speed of the corresponding frequency cutting motor 4 will decrease, but the torque will not change. When the controller 5 knows that the rotation speed of the inverter cutting motor 4 is decreased, the duty ratio of the output pulse signal can be adjusted to change the switching frequency of the switching device in the inverter circuit, and adjust the amplitude and frequency of the output voltage of the inverter circuit to Reduce the speed of the inverter cutting motor 4 and keep the torque constant. If the texture of the coal or rock is soft, the controller 5 can control the variable frequency cutting motor 4 to rotate at a constant power at a high speed to achieve rapid cutting.
本实施例提供的技术方案， 通过采用变流器调节变频截割电机的转速 和转矩， 能根据负载的变化自适应调整转速和转矩， 实现平滑调节， 以适 应不同硬度的煤炭或延时的切割进程。 并且， 本实施例提供的技术方案具 有无级调速、 无切换电流冲击的优点， 其控制方式较灵活， 能实现低速恒 转矩， 高速恒功率运行， 有效地提高了掘进作业的效率。  The technical solution provided by the embodiment adjusts the rotation speed and the torque of the variable frequency cutting motor by using the converter, and can adaptively adjust the rotation speed and the torque according to the change of the load, thereby achieving smooth adjustment to adapt to coal of different hardness or delay. The cutting process. Moreover, the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed constant power operation, and effectively improve the efficiency of the tunneling operation.
在上述技术方案的基础上， 掘进机电传动***还可以包括线路检测器 件， 用于实现对各电机的过流、 过载、 断相和漏电检测， 以及对电源的过 压和欠压起到保护作用。线路检测器件具体可包括电压传感器 6和 /或电流 传感器 （图中未画出） 。  On the basis of the above technical solutions, the tunneling electromechanical transmission system may further comprise a line detecting device for implementing overcurrent, overload, phase failure and leakage detection of each motor, and protecting against overvoltage and undervoltage of the power source. . The line detecting device may specifically include a voltage sensor 6 and/or a current sensor (not shown).
以变频截割电机 4为例， 电压传感器的探头并接在变频截割电机 4的 输入端， 电压传感器的信号输出端与控制器 5连接， 用于检测变频截割电 机 4的输入端的电压， 并发送给控制器 5。 电流传感器 6的探头串接在变 频截割电机 4的输入端， 电流传感器 6的信号输出端与控制器 5连接， 用 于检测变频截割电机 4的输入端的电流， 并发送给控制器 5。 控制器 5可 通过电压传感器和 /电流传感器 6获取到各电机输入电压的状态，若发生过 流或过载现象， 控制器 5可以及时控制相应的开关断开， 以保护各电机。  Taking the variable frequency cutting motor 4 as an example, the probe of the voltage sensor is connected to the input end of the frequency conversion cutting motor 4, and the signal output end of the voltage sensor is connected with the controller 5 for detecting the voltage of the input end of the frequency conversion cutting motor 4, And sent to the controller 5. The probe of the current sensor 6 is connected in series to the input end of the variable frequency cutting motor 4, and the signal output end of the current sensor 6 is connected to the controller 5 for detecting the current of the input terminal of the inverter cutting motor 4 and transmitting it to the controller 5. The controller 5 can obtain the state of the input voltage of each motor through the voltage sensor and /current sensor 6. If an overcurrent or overload phenomenon occurs, the controller 5 can timely control the corresponding switch to open to protect each motor.
另外， 在各电机的输入电路上还可以设置阻容吸收电路 7， 以变频截 割电机 4为例， 该阻容吸收电路 7连接在变频截割电机 4的输入端， 用于 吸收变频截割电机 4在断电瞬间产生的反向电势。 阻容吸收电路 7可采用 现有技术中常见的电路来实现， 其连接方式也可参照现有技术来实现。  In addition, a resistance-capacitance absorbing circuit 7 may be disposed on the input circuit of each motor. Taking the variable-frequency cutting motor 4 as an example, the RC absorption circuit 7 is connected to the input end of the variable-frequency cutting motor 4 for absorbing the frequency-frequency cutting. The reverse potential generated by the motor 4 at the moment of power failure. The RC absorption circuit 7 can be implemented by a circuit which is common in the prior art, and the connection manner can also be realized by referring to the prior art.
针对应用于煤炭挖掘的掘进机， 需符合国家标准规定的防爆等级要 求， 因此， 本领域技术人员可以在变流器 3的***设置防爆外壳， 将变流 器 3包覆在内部， 并且变流器 3中的各器件， 例如接线、 端子及按钮等均 采用防爆器件。 For the roadheader applied to coal excavation, it is required to meet the explosion-proof grade requirements stipulated by the national standard. Therefore, those skilled in the art can install an explosion-proof casing on the periphery of the converter 3, wrap the converter 3 inside, and change the flow. Devices in device 3, such as wiring, terminals, and buttons Use explosion-proof devices.
上述技术方案中的控制器 5可以为本领域内常用的可编程逻辑控制器 ( Programmable Logic Controller, 简称 PLC ) ， 也可以自主研发专用控制 器， 以实现上述功能。控制器 5可以通过控制器局域网络（Controller Area Network, 简称 CAN) 总线与一操作面板进行数据交互， 可以接收操作面 板发来的用户指令， 也可以向操作面板发送数据用于显示， 达到很好的人 机交互能力。 若应用在煤炭挖掘中， 该控制器 5和操作面板也应当具备防 爆能力， 且具有较好的抗震能力， 适用于长期恶劣的工作。  The controller 5 in the above technical solution may be a Programmable Logic Controller (PLC) commonly used in the field, or a dedicated controller may be independently developed to implement the above functions. The controller 5 can perform data interaction with an operation panel through a Controller Area Network (CAN) bus, and can receive user commands sent from the operation panel, and can also send data to the operation panel for display, which is good. Human-computer interaction capabilities. If applied to coal mining, the controller 5 and the operation panel should also have anti-explosion capability and good seismic resistance, which is suitable for long-term bad work.
本实施例还提供一种掘进机， 包括上述技术方案中的掘进机电传动系 统。 掘进机采用上述技术方案所提供的掘进机电传动***， 通过采用变流 器调节变频截割电机的转速和转矩， 能根据负载的变化自适应调整转速和 转矩， 实现平滑调节， 以适应不同硬度的煤炭或延时的切割进程。 并且， 本实施例提供的技术方案具有无级调速、 无切换电流冲击的优点， 其控制 方式较灵活， 能实现低速恒转矩， 高速恒功率运行， 有效地提高了掘进作 业的效率。  The embodiment further provides a roadheader comprising the tunneling electromechanical transmission system of the above technical solution. The roadheader adopts the excavation electromechanical transmission system provided by the above technical solution. By adopting the converter to adjust the speed and torque of the variable frequency cutting motor, the speed and torque can be adaptively adjusted according to the change of the load, so as to achieve smooth adjustment to adapt to different Hardness of coal or a delayed cutting process. Moreover, the technical solution provided by the embodiment has the advantages of stepless speed regulation and no switching current impact, and the control mode is flexible, and can realize low speed constant torque, high speed and constant power operation, and effectively improve the efficiency of the tunneling operation.
并且将其中各器件均设置为具有防爆功能， 则可以适用于煤炭挖掘领 域， 在提高生产效率的同时， 实现最大限度的保护人员和设备安全。  And each of these devices is set to have an explosion-proof function, which can be applied to the field of coal mining, and achieve maximum protection of personnel and equipment while improving production efficiency.
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非 对其限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的 普通技术人员应当理解： 其依然可以对前述各实施例所记载的技术方案进 行修改， 或者对其中部分或者全部技术特征进行等同替换； 而这些修改或 者替换， 并不使相应技术方案的本质脱离本发明各实施例技术方案的范 围。  It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

权 利 要 求 书 claims
1、 一种掘进机电传动***， 包括主电源和开关， 其特征在于， 还包 括： 变流器、 变频截割电机和控制器； 1. An excavation electromechanical transmission system, including a main power supply and a switch, characterized in that it also includes: a converter, a variable frequency cutting motor and a controller;
所述变频截割电机、 变流器和开关依次连接， 并连接至所述主电源； 所述变流器还与所述控制器连接， 用于根据所述控制器发出的控制信 号调节所述变流器输出的电压， 以调整所述变频截割电机的转速和转矩。 The frequency conversion cutting motor, converter and switch are connected in sequence and connected to the main power supply; the converter is also connected to the controller for adjusting the control signal according to the control signal sent by the controller. The voltage output by the converter is used to adjust the speed and torque of the variable frequency cutting motor.
2、 根据权利要求 1所述的掘进机电传动***， 其特征在于， 所述变 频截割电机中的转子铁芯为硅钢片， 转子绕组为铜导条。 2. The excavation electromechanical transmission system according to claim 1, characterized in that the rotor core in the variable frequency cutting motor is a silicon steel sheet, and the rotor winding is a copper conductor bar.
3、 根据权利要求 2所述的掘进机电传动***， 其特征在于， 所述变 频截割电机中的绝缘结构采用高绝缘强度材料制成。 3. The excavation electromechanical transmission system according to claim 2, characterized in that the insulation structure in the variable frequency cutting motor is made of high insulation strength materials.
4、 根据权利要求 3所述的掘进机电传动***， 其特征在于， 所述变 频截割电机中的轴承为树脂绝缘轴承。 4. The excavation electromechanical transmission system according to claim 3, characterized in that the bearings in the variable frequency cutting motor are resin insulated bearings.
5、 根据权利要求 1-4任一项所述的掘进机电传动***， 其特征在于， 所述变流器包括依次连接的整流电路、 中间直流电路和逆变电路。 5. The excavation electromechanical transmission system according to any one of claims 1 to 4, characterized in that the converter includes a rectifier circuit, an intermediate DC circuit and an inverter circuit connected in sequence.
6、 根据权利要求 5所述的掘进机电传动***， 其特征在于， 所述开 关包括预充电开关和工作开关； 6. The excavation electromechanical transmission system according to claim 5, characterized in that the switch includes a precharge switch and a working switch;
所述预充电开关的一端连接至所述主电源， 另一端连接至所述变流器 的输入端； One end of the precharge switch is connected to the main power supply, and the other end is connected to the input end of the converter;
所述工作开关的一端连接至所述主电源， 另一端连接至所述变流器的 输入端。 One end of the working switch is connected to the main power supply, and the other end is connected to the input end of the converter.
7、 根据权利要求 6所述的掘进机电传动***， 其特征在于， 所述变 流器设置有防爆外壳； 7. The excavation electromechanical transmission system according to claim 6, characterized in that the converter is provided with an explosion-proof shell;
所述变流器中的各器件均采用防爆器件。 Each component in the converter adopts explosion-proof components.
8、 根据权利要 7所述的掘进机电传动***， 其特征在于， 还包括电 压传感器和 /或电流传感器； 8. The excavation electromechanical transmission system according to claim 7, further comprising a voltage sensor and/or a current sensor;
所述电压传感器的探头并接在所述变频截割电机的输入端， 所述电压 传感器的信号输出端与所述控制器连接， 用于检测所述变频截割电机的输 入端的电压， 并发送给所述控制器； The probe of the voltage sensor is connected in parallel to the input end of the frequency conversion cutting motor, and the signal output end of the voltage sensor is connected to the controller for detecting the voltage at the input end of the frequency conversion cutting motor and sending to said controller;
所述电流传感器的探头串接在所述变频截割电机的输入端， 所述电流 传感器的信号输出端与所述控制器连接， 用于检测所述变频截割电机的输 入端的电流， 并发送给所述控制器。 The probe of the current sensor is connected in series to the input end of the variable frequency cutting motor, and the signal output end of the current sensor is connected to the controller for detecting the output of the variable frequency cutting motor. input current and sent to the controller.
9、 根据权利要 8所述的掘进机电传动***， 其特征在于， 还包括阻 容吸收电路； 9. The excavation electromechanical transmission system according to claim 8, further comprising a resistance-capacitance absorption circuit;
所述阻容吸收电路连接在所述变频截割电机的输入端， 用于吸收所述 变频截割电机在断电瞬间产生的反向电势。 The resistance-capacitance absorption circuit is connected to the input end of the frequency conversion cutting motor and is used to absorb the reverse potential generated by the frequency conversion cutting motor at the moment of power outage.
10、 一种掘进机， 其特征在于， 包括如权利要求 1-9任一项所述的掘 进机电传动***。 10. A boring machine, characterized in that it includes the boring machine electric transmission system according to any one of claims 1 to 9.
PCT/CN2013/090773 2013-11-29 2013-12-27 Electric drive system for heading machine and heading machine WO2015078083A1 (en)

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