WO2013000202A1 - 一种液压卷扬机构控制方法及系统 - Google Patents

一种液压卷扬机构控制方法及系统 Download PDF

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Publication number
WO2013000202A1
WO2013000202A1 PCT/CN2011/079696 CN2011079696W WO2013000202A1 WO 2013000202 A1 WO2013000202 A1 WO 2013000202A1 CN 2011079696 W CN2011079696 W CN 2011079696W WO 2013000202 A1 WO2013000202 A1 WO 2013000202A1
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WIPO (PCT)
Prior art keywords
hydraulic
performance parameter
hoisting mechanism
control
preset target
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PCT/CN2011/079696
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English (en)
French (fr)
Inventor
郑捷
Original Assignee
长沙中联重工科技发展股份有限公司
湖南中联重科专用车有限责任公司
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Application filed by 长沙中联重工科技发展股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 长沙中联重工科技发展股份有限公司
Publication of WO2013000202A1 publication Critical patent/WO2013000202A1/zh

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/40Control devices
    • B66D1/48Control devices automatic

Definitions

  • the present invention relates to the technical field of hydraulic hoisting mechanisms, and more particularly to a hydraulic hoisting mechanism control method for controlling the operating state of a control member of a hydraulic hoisting mechanism.
  • the invention also relates to a hydraulic hoist mechanism control system. Background technique
  • the hydraulic hoisting mechanism is a commonly used lifting mechanism, which has the advantages of overload protection function, impact protection function, explosion-proof performance, etc., and is widely used in various lifting equipment occasions.
  • the hydraulic hoisting mechanism usually includes a power source, a hydraulic pump, a hydraulic circuit, a hydraulic motor, a reducer, a reel and a brake.
  • the power output end of the power source is connected to the power input end of the hydraulic pump, and the oil outlet of the hydraulic pump passes through the hydraulic circuit.
  • the oil inlet of the hydraulic motor is connected, the power output end of the hydraulic motor is connected with the power input end of the reducer, and the power output end of the reducer is connected to the rotating shaft of the reel, and the brake provides braking force to the reel to brake it.
  • the hydraulic pump outputs high-pressure hydraulic oil.
  • the high-pressure hydraulic oil enters the hydraulic motor through the action of various hydraulic valves in the hydraulic circuit, and drives the hydraulic motor to rotate.
  • the driving force provided by the hydraulic motor is increased and decreased after the speed reduction of the reducer. Transfer to the reel and drive the reel to rotate.
  • the hydraulic reel mechanism of the prior art generally controls the working state of the control component of the hydraulic hoisting mechanism by directly controlling the hydraulic circuit by using a hydraulic handle, which mainly depends on the experience of the operator, has low control precision, and the hydraulic hoisting mechanism works.
  • the stability of the hydraulic system is poor; and if the hydraulic system fails, the operator's experience often fails to judge the fault in time or it takes a long time to judge the fault, resulting in an accident or serious damage to the device.
  • a first object of the present invention is to provide a hydraulic hoist mechanism control method by which the control accuracy of the hydraulic hoisting mechanism and the stability of the hydraulic hoisting mechanism during operation can be improved.
  • a second object of the present invention is to provide a hydraulic hoist mechanism control system.
  • the present invention provides a hydraulic hoist mechanism control method for controlling the operating state of a control component of a hydraulic hoisting mechanism, including the following steps:
  • Step A detecting performance parameters of the control component in real time
  • Step B comparing the detected performance parameter with a preset target value, and if the performance parameter deviates from the preset target value, sending a control signal to the control component, and controlling the performance parameter of the control component to be close to The preset target value.
  • control component comprises a hydraulic pump, a hydraulic motor, a hydraulic circuit, a brake; a performance parameter of the hydraulic pump is a displacement, a performance parameter of the hydraulic motor is a displacement, and a performance parameter of the hydraulic circuit is a pressure. p, the performance parameter of the brake is the braking force F.
  • the method further includes:
  • Step C detecting the actual rotational speed V of the reel of the hydraulic hoisting mechanism in real time
  • Step D the actual rotational speed V and the preset target rotational speed V.
  • a comparison is made if the actual rotational speed V deviates from the preset target rotational speed v . , according to the formula of the reel speed
  • V f (F, P, q, q 2 ), issuing a control signal to one or more of the control components, changing the performance parameters of the control component such that the actual rotational speed V is close to the predetermined target rotational speed ⁇ . .
  • the method further includes:
  • Step E detecting the actual torque T of the reel of the hoisting mechanism in real time
  • Step F the actual torque T and the preset target torque T.
  • a comparison is made if the actual torque T deviates from the preset target torque T.
  • generating a control signal to one or more of the control components according to a reel torque calculation formula T g(F, P, 3 ⁇ 41 , q 2 ), changing a performance parameter of the control component, such that the actual torque T is close to the preset target torque! .
  • the method further includes:
  • Step A1 comparing the detected performance parameter with a preset threshold, and if the performance parameter is greater than the preset threshold, issuing an alarm signal or / and controlling the hydraulic hoisting mechanism to stop working.
  • the method further includes:
  • Step C1 comparing the detected actual speed V with a preset threshold, and if the actual speed V is greater than the preset threshold, issuing an alarm signal or / and controlling the hydraulic hoisting mechanism to stop working.
  • the method further includes:
  • step E1 the detected actual torque T is compared with a preset threshold. If the actual torque T is greater than the preset threshold, an alarm signal is issued or / and the hydraulic hoisting mechanism is stopped.
  • the hydraulic hoisting mechanism control method calculates the optimal performance parameter of the corresponding control component under the working condition by a corresponding algorithm, and sets the performance parameter as a preset target value, Detecting performance parameters of the control component in real time, comparing the detected performance parameter with a preset target value, and if the performance parameter deviates from the preset target value, sending a control signal to the control component, and controlling the control component
  • the performance parameter is close to the preset target value.
  • the hydraulic winch control method can realize the closed-loop control of the hydraulic system of the hydraulic hoisting mechanism, so that the control component always works under the preset performance parameter or the working condition close to the preset performance parameter, and the control precision is high, thereby making the whole
  • the hydraulic hoisting mechanism works under optimal conditions and can achieve precise control of the rotational speed and torque of the reel.
  • the detected performance parameter is compared with a preset threshold, and if the performance parameter is greater than the preset threshold, an alarm is issued or / and the hydraulic hoisting mechanism is stopped.
  • the hydraulic system can be judged according to the detected performance parameter signal to detect whether there is leakage, overpressure, wear and the like, and an alarm or / and control of the hydraulic hoisting mechanism to stop the operation, thereby avoiding accidents or serious damage of the device.
  • the present invention provides a hydraulic hoist mechanism control system,
  • the working state of the control unit for controlling the hydraulic hoisting mechanism including:
  • a detecting device configured to detect performance parameters of the control component in real time, and send a detection signal to the controller
  • a controller configured to receive the detection signal, compare the detected performance parameter with a preset target value, and if the performance parameter deviates from the preset target value, send a control signal to the control component, and control The performance parameter of the control component is close to the preset target value.
  • control component comprises a hydraulic pump, a hydraulic motor, a hydraulic circuit, a brake; a performance parameter of the hydraulic pump is a displacement, a performance parameter of the hydraulic motor is a displacement, and a performance parameter of the hydraulic circuit is a pressure. p, the performance parameter of the brake is the braking force F.
  • the hydraulic pump is a metering pump.
  • the detecting means comprises a pressure sensor for detecting the pressure P of the hydraulic circuit.
  • the detecting device further comprises a speed sensor for detecting the actual rotational speed V of the reel of the hydraulic hoisting mechanism in real time.
  • the detecting means further comprises a torque sensor for detecting the actual torque ⁇ of the reel of the hydraulic hoisting mechanism in real time.
  • an alarm device is further included, and the alarm device is configured to receive an alarm signal sent by the controller.
  • the brake is a spool brake disposed on the spool.
  • the brake is an electromagnetic brake disposed on a power output end of the hydraulic motor.
  • the hydraulic hoisting mechanism control system comprises a detecting device and a controller; the detecting device is configured to detect the performance parameter of the control component in real time, and sends a detection signal to the controller; the controller is configured to receive the detection signal, and The detected performance parameter is compared with a preset target value, and if the performance parameter deviates from the preset target value, the control component is issued control And controlling a performance parameter of the control component to be close to the preset target value.
  • the hydraulic hoisting mechanism control system can realize the closed-loop control of the hydraulic system of the hydraulic hoisting mechanism, so that the control component always works under the preset performance parameter or the working condition close to the preset performance parameter, and the control precision is high, thereby making the whole
  • the hydraulic hoisting mechanism works under optimal conditions and can achieve precise control of the rotational speed and torque of the reel.
  • FIG. 1 is a flow chart of a specific embodiment of a hydraulic winch control method according to the present invention.
  • Fig. 2 is a schematic view showing the structure of a specific embodiment of a hydraulic hoisting mechanism control system according to the present invention. detailed description
  • FIG. 1 is a flow chart of a specific embodiment of a hydraulic winch control method according to the present invention.
  • the hydraulic hoist mechanism control method for controlling the operating state of the control member of the hydraulic hoisting mechanism provided by the present invention comprises the following steps.
  • Step S11 detecting performance parameters of the control component in real time.
  • the hydraulic hoisting mechanism includes a power source, a hydraulic pump, a hydraulic circuit, a hydraulic motor, a reducer, a reel, a brake, and the like, and the control component of the hydraulic hoist mechanism includes the hydraulic pump, the hydraulic motor, the hydraulic circuit, and the brake
  • the performance parameter of the hydraulic pump is displacement
  • the performance parameter of the hydraulic motor is displacement
  • the performance parameter of the hydraulic circuit is pressure p
  • the performance parameter of the brake is braking force F.
  • the hydraulic pump may be a quantitative pump or a partial quantitative pump
  • the pressure pump sends a hydraulic pump displacement signal in real time, or installs a proportional valve in the hydraulic circuit, and the proportional valve controls the displacement of the hydraulic pump to obtain the displacement of the hydraulic pump ;
  • the pressure sensor can be installed in the hydraulic circuit, and the pressure sensor is real-time.
  • the hydraulic motor can use a quantitative motor or a part of a quantitative motor, the hydraulic motor can output a hydraulic motor displacement signal, or install a proportional valve in the hydraulic circuit, and the proportional valve controls the displacement of the hydraulic motor to
  • the displacement of the hydraulic motor can be obtained in real time by using a braking force detecting device such as a brake pressure sensor to detect the braking force F of the brake in real time.
  • Step S12 comparing the detected performance parameter with a preset target value, and if the performance parameter deviates from the preset target value, sending a control signal to the control component, and controlling the performance parameter of the control component to be close to The preset target value.
  • the optimal performance parameter of the control component under the working condition is calculated by the corresponding algorithm, and the optimal performance parameter is set as the preset target value, and the step S11 is performed.
  • the detected performance parameter is compared with a preset target value. If the detected performance parameter deviates from the preset target value, a control signal is sent to the control component, and the performance parameter of the control control component is close to the preset target value.
  • the detected displacement of the hydraulic pump may be compared with a preset target value, and if the displacement qi of the hydraulic pump deviates from a preset target value, the displacement to the hydraulic pump (or to the control hydraulic pump)
  • the proportional valve sends a control signal to make the displacement of the hydraulic pump close to the preset target value
  • the displacement of the detected hydraulic motor can be compared with the preset target value, if the displacement of the hydraulic motor deviates from the preset target value , a control signal is sent to the hydraulic motor (or a proportional valve that controls the displacement of the hydraulic motor) so that the displacement of the hydraulic motor approaches a preset target value
  • the pressure p in the detected hydraulic circuit can be preset with a target value
  • a control signal is sent to the corresponding control valve in the hydraulic circuit, so that the pressure p in the hydraulic circuit approaches a preset target value
  • the detected brake can be The braking force F is
  • the hydraulic winch control method can realize the closed-loop control of the hydraulic system of the hydraulic hoisting mechanism, so that the control component always works under the preset performance parameter or the working condition close to the preset performance parameter, and the control precision is high, thereby making the whole
  • the hydraulic hoisting mechanism works under optimal conditions and can achieve precise control of the rotational speed and torque of the reel.
  • the method may further include:
  • Step S13 detecting the actual rotational speed V of the reel of the hydraulic hoisting mechanism in real time.
  • the speed sensor may be used to detect the actual rotational speed V of the reel in real time, and the speed sensor may be disposed on the reducer or on the reel. .
  • Step S14 the actual rotational speed V and the preset target rotational speed V.
  • a comparison is made if the actual rotational speed V deviates from the preset target rotational speed V. , according to the formula of the reel speed
  • V f(F, P, q, q 2 ), issuing a control signal to one or more of the control components, changing a performance parameter of the control component such that the actual rotational speed V is close to the predetermined target rotational speed ⁇ . .
  • the optimal speed of the reel under the working condition is calculated by a corresponding algorithm, and the optimal rotational speed is set as the preset target rotational speed v . , the detected actual speed V and the preset target speed V. A comparison is made if the actual rotational speed V deviates from the preset target rotational speed V.
  • the displacement of the hydraulic pump can be 3 ⁇ 4 ⁇ , the displacement of the hydraulic motor 3 ⁇ 4 2, the pressure P in the hydraulic circuit, the braking force of the brake
  • One or more of the performance parameters such as F, as a variable, send a control signal to one or more of the hydraulic pump, the hydraulic motor, the hydraulic circuit, the brake, and change the corresponding performance parameter such that the actual rotational speed V is close to the preset Target speed V. , can accurately control the rotation of the reel, so that the reel speed is always in the optimal working condition.
  • the method may further include:
  • Step S15 detecting the actual torque T of the reel of the hydraulic hoisting mechanism in real time.
  • the torque sensor may be used to detect the actual torque T of the reel in real time, and the torque sensor may be set on the speed reducer, or may be set. On the reel.
  • step S16 the actual torque T is compared with the preset target torque T. A comparison is made if the actual torque ⁇ deviates from the preset target torque ⁇ . , according to the formula for the reel torque
  • T g(F, P, q, q 2 ), issuing a control signal to one or more of the control components, changing a performance parameter of the control component such that the actual torque T is close to the preset target torque ! .
  • a control signal is sent to one or more of the hydraulic pump, the hydraulic motor, the hydraulic circuit, the brake, and the corresponding performance parameter is changed such that the actual torque ⁇ is close to the preset target Torque ⁇ .
  • the torque of the reel can be precisely controlled, so that the torque of the reel is always in the optimal condition.
  • the brake is a spool brake disposed on the spool.
  • the brake may also be an electromagnetic brake disposed on the power output end of the hydraulic motor.
  • a control signal may be sent to the electromagnetic valve for controlling the electromagnetic brake, by controlling the opening of the electromagnetic valve. The degree of braking force of the electromagnetic brake is controlled.
  • step S15 and the step S16 are located in the step S14, the hydraulic hoisting mechanism control method provided by the present invention is not limited thereto, and the present invention does not perform the steps S15, S16, S13, and S14.
  • Step S15, step S16 may be directly performed after step S12, and step S13, step S14 may be performed after step S16; or After step S12, step S13, step S14 and step S15, step S16 can be performed synchronously. It can be understood that step S14 must be performed after step S13, and step S16 must be performed after step S15, and all of the above solutions should be in the protection scope of the present invention. Inside.
  • the method may further include:
  • Step S11 (this step is not shown in FIG. 1), comparing the detected performance parameter with a preset threshold, and if the performance parameter is greater than the preset threshold, issuing an alarm or/and controlling The hydraulic hoisting mechanism stops working.
  • the hydraulic circuits of each part of the hydraulic system have a normal working pressure range. If the measured pressure deviates from the working pressure range or suddenly changes widely, a problem occurs in the reaction hydraulic system, and the detected performance parameters and presets can be If the threshold value is greater than the preset threshold value, it can be judged that the hydraulic system has a fault such as leakage, overpressure, wear, etc., and an alarm or/and the hydraulic hoisting mechanism can be controlled to stop the operation, thereby avoiding an accident or a device. damaged severely.
  • step S13 and before step S14 the method further includes:
  • Step S131 (this step is not shown in FIG. 1), comparing the detected actual speed V with a preset threshold, and if the actual speed V is greater than the preset threshold, an alarm or / And controlling the hydraulic hoisting mechanism to stop working. If the rotation speed of the reel exceeds the normal working range, it can be judged that the hydraulic hoisting mechanism has a fault, and an alarm signal / can be issued at this time to control the hydraulic hoisting mechanism to stop working, thereby avoiding an accident or serious damage of the device.
  • step S15 and before step S16 the method further includes:
  • Step S151 (this step is not shown in FIG. 1), comparing the detected actual torque T with a preset threshold, and if the actual torque T is greater than the preset threshold, an alarm is issued. Signal or / and control the hydraulic hoisting mechanism to stop working. If the torque of the reel exceeds the normal working range, it can be judged that the hydraulic hoisting mechanism has a fault, and an alarm signal / can be issued at this time to control the hydraulic hoisting mechanism to stop working, thereby avoiding an accident or serious damage of the device.
  • the invention also provides a hydraulic hoist mechanism control system, comprising a detecting device and a controller.
  • the detecting means is for detecting the performance parameters of the control unit in real time.
  • the hydraulic hoisting mechanism includes a power source, a hydraulic pump, a hydraulic circuit, a hydraulic motor, a reducer, a reel, a brake, and the like, and the control component of the hydraulic hoist mechanism includes the hydraulic pump, the hydraulic motor, the hydraulic circuit, and the brake
  • the performance parameter of the hydraulic pump is displacement
  • the performance parameter of the hydraulic motor is displacement
  • the performance parameter of the hydraulic circuit is pressure p
  • the performance parameter of the brake is braking force F.
  • the hydraulic pump may use a quantitative pump or a partial quantitative pump, and the hydraulic pump discharges a hydraulic pump displacement signal in real time, or installs a proportional valve in the hydraulic circuit, and the proportional valve controls the displacement of the hydraulic pump to obtain
  • the displacement of the hydraulic pump ;
  • the pressure sensor can be installed in the hydraulic circuit, the pressure sensor P can detect the pressure P in the hydraulic circuit in real time;
  • the hydraulic motor can use the quantitative motor or part of the quantitative motor, and the hydraulic motor can output the hydraulic motor displacement signal, or
  • a proportional valve is installed in the hydraulic circuit, and the displacement of the hydraulic motor is controlled by the proportional valve to obtain the displacement of the hydraulic motor in real time.
  • the braking force F of the brake pressure sensor can be used to detect the braking force F of the brake in real time.
  • a controller configured to receive a detection signal sent by the detecting device, compare the detected performance parameter with a preset target value, and if the performance parameter deviates from the preset target value, send the control component to the control component And a control signal that controls a performance parameter of the control component to be close to the preset target value.
  • the controller calculates the optimal performance parameter of the control component under the operating condition according to the control command issued by the operator, the working state of the system, etc., and sets the optimal performance parameter as the preset target value.
  • the detected performance parameter is compared with a preset target value. If the detected performance parameter deviates from the preset target value, a control signal is sent to the control component, and the performance parameter of the control control component is close to the preset target value.
  • the controller receives the displacement signal of the hydraulic pump, and compares the detected displacement of the hydraulic pump with a preset target value, and if the displacement of the hydraulic pump deviates from a preset target value, A control signal is sent to the hydraulic pump (or to a proportional valve that controls the displacement of the hydraulic pump) such that the displacement of the hydraulic pump approaches a predetermined target value.
  • the controller receives the displacement signal of the hydraulic motor, and compares the detected displacement of the hydraulic motor with a preset target value. If the displacement of the hydraulic motor deviates from the preset target value, the hydraulic motor (or the control hydraulic pressure) The proportional valve of the motor displacement sends a control signal that causes the displacement of the hydraulic motor to approach a preset target value.
  • the controller receives the pressure signal, and compares the detected pressure p in the hydraulic circuit with a preset target value. If the pressure p in the hydraulic circuit deviates from the preset target value, the control is issued to the corresponding control valve in the hydraulic circuit. The signal causes the pressure p in the hydraulic circuit to approach a preset target value.
  • the controller receives the braking force signal, and compares the detected braking force F of the brake with a preset target value. If the braking force F of the brake deviates from the preset target value, a control signal is sent to the brake to cause the braking force of the brake. F is close to the preset target value.
  • the hydraulic hoisting mechanism control system can realize the closed-loop control of the hydraulic system of the hydraulic hoisting mechanism, so that the control component always works under the preset performance parameter or the working condition close to the preset performance parameter, and the control precision is high, thereby making the whole
  • the hydraulic hoisting mechanism works under optimal conditions and can achieve precise control of the rotational speed and torque of the reel.
  • the detecting device further includes a speed sensor for detecting the actual rotational speed V of the reel of the hydraulic hoisting mechanism in real time, and the speed sensor can be set.
  • the controller receives the rotational speed signal from the speed sensor, and the actual rotational speed V and the preset target rotational speed V. A comparison is made if the actual rotational speed V deviates from the preset target rotational speed v .
  • the controller passes the corresponding calculation according to the control command issued by the operator, the working state of the system, etc.
  • the method calculates the optimal rotational speed of the reel under the working condition, and sets the optimal rotational speed to the preset target rotational speed v . , the detected actual speed V and the preset target speed V.
  • One or more of the performance parameters are used as variables to issue a control signal to one or more of the hydraulic pump, the hydraulic motor, the hydraulic circuit, the brake, and change the corresponding performance parameter such that the actual rotational speed V approaches the predetermined target rotational speed. ⁇ . , can accurately control the rotation of the reel, so that the reel speed is always in the optimal working condition.
  • the detecting device further includes a torque sensor for detecting the actual torque ⁇ of the reel of the hydraulic hoisting mechanism in real time
  • the controller calculates the optimal torque of the reel under the operating condition according to the control command issued by the operator, the working state of the system, etc., and sets the optimal torque as the preset target torque ⁇ .
  • the actual torque ⁇ is compared with the preset target torque ⁇ . A comparison is made if the actual torque ⁇ deviates from the preset target torque ⁇ .
  • the reel torque calculation formula T g (F, P, q, q 2 ), the displacement of the hydraulic pump ⁇ , the displacement of the hydraulic motor, the pressure P in the hydraulic circuit, the braking force F of the brake
  • One or more of the performance parameters are used as variables to issue a control signal to one or more of the hydraulic pump, the hydraulic motor, the hydraulic circuit, the brake, and change the corresponding performance parameter such that the actual torque T approaches the preset Target torque T. , can precisely control the torque of the reel, making the reel The torque is always in optimum condition.
  • the brake is a spool brake disposed on the spool.
  • the brake may also be an electromagnetic brake disposed on the power output end of the hydraulic motor.
  • a control signal may be sent to the electromagnetic valve for controlling the electromagnetic brake, by controlling the opening of the electromagnetic valve.
  • the degree of braking force of the electromagnetic brake is controlled.
  • the brake can also include both a spool brake and an electromagnetic brake.
  • an alarm device is also included, and the alarm device is configured to receive an alarm signal sent by the controller.
  • the controller compares the detected performance parameter with a preset threshold, and if the performance parameter is greater than the preset threshold, sends an alarm signal to the alarm device, or/and controls the hydraulic hoist mechanism to stop working .
  • the hydraulic circuits of each part of the hydraulic system have a normal working pressure range. If the measured pressure deviates from the working pressure range or suddenly changes widely, a problem occurs in the reaction hydraulic system, and the detected performance parameters and presets can be If the threshold value is greater than the preset threshold, it can be judged that the hydraulic system has faults such as leakage, overpressure, wear, etc., so as to avoid accidents or serious damage of the device.
  • the controller compares the detected actual speed V with a preset threshold, and if the actual speed V is greater than the preset threshold, the alarm device is issued to issue an alarm signal, or/and control
  • the hydraulic hoisting mechanism stops working. If the rotation speed of the reel exceeds the normal working range, it can be judged that the hydraulic hoisting mechanism has a fault, and an alarm signal / can be issued at this time to control the hydraulic hoisting mechanism to stop working, thereby avoiding an accident or serious damage of the device.
  • the controller compares the detected actual torque ⁇ with a preset threshold, and if the actual torque ⁇ is greater than the preset threshold, sends an alarm signal to the alarm device, or And controlling the hydraulic hoisting mechanism to stop working. If the torque of the reel exceeds the normal working range, it can be judged that the hydraulic hoisting mechanism has malfunctioned, thereby avoiding an accident or serious damage of the device.

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Abstract

公开了一种液压卷扬机构控制方法及系统,用于控制液压卷扬机构的控制部件的工作状态。该控制方法包括以下步骤:实时检测所述控制部件的性能参数;将所检测到的性能参数与预设目标值进行比较,若所述性能参数偏离所述预设目标值,则向所述控制部件发出控制信号,控制所述控制部件的性能参数接近所述预设目标值。该控制方法可提高液压卷扬机构的控制精度及液压卷扬机构工作时的稳定性。

Description

一种液压卷扬机构控制方法及系统
技术领域
本发明涉及液压卷扬机构技术领域, 尤其涉及一种用于控制液压卷扬 机构的控制部件的工作状态的液压卷扬机构控制方法。 本发明还涉及一种 液压卷扬机构控制系统。 背景技术
液压卷扬机构是一种常用的提升机构, 其具有过载保护功能、 冲击保 护功能、 防爆性能等优点, 广泛应用于各种起重设备场合。
液压卷扬机构通常包括动力源、 液压泵、 液压回路、 液压马达、 减速 机、 卷筒及制动器, 动力源的动力输出端与液压泵的动力输入端连接, 液 压泵的出油口通过液压回路与液压马达的进油口连通, 液压马达的动力输 出端与减速机的动力输入端连接, 减速机的动力输出端连接卷筒的转轴, 制动器向卷筒提供制动力对其进行制动。
在动力源驱动下, 液压泵输出高压液压油, 高压液压油经过液压回路 中各种液压阀的作用后进入液压马达, 驱动液压马达旋转, 液压马达提供 的驱动力经过减速机降速增扭后传递至卷筒, 带动卷筒旋转。
现有技术中的液压卷筒机构, 通常采用液压手柄直接控制液压回路的 方式控制液压卷扬机构的控制部件的工作状态, 其主要依靠操作者的经验 来控制, 控制精度低, 液压卷扬机构工作时的稳定性较差; 而且若液压系 统出现故障, 操作者的经验往往不能及时判断故障或者需要较长时间才能 判断出故障, 从而导致事故发生或器件的严重损坏。
因此, 如何提高液压卷扬机构的控制精度及液压卷扬机构工作时的稳 定性, 成为本领域技术人员亟待解决的技术难题。 发明内容
本发明的第一个目的是提供一种液压卷扬机构控制方法, 通过该液压 卷扬机构控制方法可提高液压卷扬机构的控制精度及液压卷扬机构工作时 的稳定性。 本发明的第二个目的是提供一种液压卷扬机构控制系统。
为了实现上述第一个目的, 本发明提供了一种液压卷扬机构控制方法, 用于控制液压卷扬机构的控制部件的工作状态, 包括以下步骤:
步骤 A、 实时检测所述控制部件的性能参数;
步骤 B , 将所检测到的性能参数与预设目标值进行比较, 若所述性能 参数偏离所述预设目标值, 则向所述控制部件发出控制信号, 控制所述控 制部件的性能参数接近所述预设目标值。
优选的, 所述控制部件包括液压泵、 液压马达、 液压回路、 制动器; 所述液压泵的性能参数为排量 , 所述液压马达的性能参数为排量 , 所 述液压回路的性能参数为压力 p, 所述制动器的性能参数为制动力 F。
优选的, 所述步骤 B之后还包括:
步骤 C, 实时检测液压卷扬机构的卷筒的实际转速 V;
步骤 D, 将所述实际转速 V与预设目标转速 V。进行比较, 若所述实际 转速 V 偏离所述预设目标转速 v。, 则根据卷筒转速计算公式
V = f (F, P, q, q2), 向一个或多个所述控制部件发出控制信号, 改变该控制 部件的性能参数, 使得所述实际转速 V接近所述预设目标转速¥。。
优选的, 所述步骤 B之后或所述步骤 D之后, 还包括:
步骤 E, 实时检测卷扬机构的卷筒的实际转矩 T;
步骤 F,将所述实际转矩 T与预设目标转矩 T。进行比较,若实际转矩 T 偏离所述预设目标转矩 T。, 则根据卷筒转矩计算公式 T = g(F, P, ¾1, q2), 向 一个或多个所述控制部件发出控制信号, 改变该控制部件的性能参数, 使 得所述实际转矩 T接近所述预设目标转矩! 。 优选的, 所述步骤 A之后、 步骤 B之前还包括:
步骤 A1 , 将所检测到的性能参数与预设阀值进行比较, 若所述性能参 数大于所述预设阀值,则发出报警信号或 /并控制该液压卷扬机构停止工作。
优选的, 所述步骤 C之后、 步骤 D之前还包括:
步骤 C1 , 将所检测到的实际转速 V与预设阀值进行比较, 若所述实际 转速 V大于所述预设阀值, 则发出报警信号或 /并控制该液压卷扬机构停止 工作。
优选的, 所述步骤 E之后、 步骤 F之前还包括:
步骤 E1 , 将所检测到的实际转矩 T与预设阀值进行比较, 若所述实际 转矩 T大于所述预设阀值, 则发出报警信号或 /并控制该液压卷扬机构停止 工作。
本发明提供的液压卷扬机构控制方法, 这种液压卷扬机构控制方法, 通过相应的算法计算出相应控制部件在该工况下的最优性能参数, 将该性 能参数设定为预设目标值, 实时检测控制部件的性能参数, 将所检测到的 性能参数与预设目标值进行比较, 若所述性能参数偏离预设目标值, 则向 所述控制部件发出控制信号, 控制所述控制部件的性能参数接近预设目标 值。 这种液压卷扬机构控制方法可实现液压卷扬机构的液压系统的闭环控 制, 使得控制部件始终以预设的性能参数或接近预设的性能参数的工况下 工作, 控制精度较高, 进而使得整个液压卷扬机构工作在最优的工况下, 并可实现对卷筒的转速、 转矩的精确控制。
优选方案中, 将所检测到的性能参数与预设阀值进行比较, 若所述性 能参数大于所述预设阀值,则发出报警或 /并控制该液压卷扬机构停止工作。 可根据检测到的性能参数信号及时判断液压系统是否存在泄漏、 超压、 磨 损等情况, 发出报警或 /并控制液压卷扬机构停止工作, 从而可避免事故发 生或器件的严重损坏。
为了实现上述第二个目的, 本发明提供了一种液压卷扬机构控制系统, 用于控制液压卷扬机构的控制部件的工作状态, 包括:
检测装置, 用于实时检测所述控制部件的性能参数, 并向控制器发出 检测信号;
控制器, 用于接收所述检测信号, 将所检测到的性能参数与预设目标 值进行比较, 若所述性能参数偏离所述预设目标值, 则向所述控制部件发 出控制信号, 控制所述控制部件的性能参数接近所述预设目标值。
优选的, 所述控制部件包括液压泵、 液压马达、 液压回路、 制动器; 所述液压泵的性能参数为排量 , 所述液压马达的性能参数为排量 , 所 述液压回路的性能参数为压力 p, 所述制动器的性能参数为制动力 F。
优选的, 所述液压泵为定量泵。
优选的, 所述检测装置包括压力传感器, 所述压力传感器用于检测液 压回路的压力 P。
优选的, 所述检测装置还包括速度传感器, 所述速度传感器用于实时 检测液压卷扬机构的卷筒的实际转速 V。
优选的, 所述检测装置还包括转矩传感器, 所述转矩传感器用于实时 检测液压卷扬机构的卷筒的实际转矩 τ。
优选的, 还包括报警装置, 该报警装置用于接收所述控制器发出的报 警信号。
优选的, 所述制动器为设置在所述卷筒上的卷筒制动器。
优选的, 所述制动器为设置在所述液压马达动力输出端上的电磁制动 器。
本发明提供的液压卷扬机构控制系统包括检测装置、 控制器; 检测装 置用于实时检测所述控制部件的性能参数, 并向控制器发出检测信号; 控 制器, 用于接收所述检测信号, 将所检测到的性能参数与预设目标值进行 比较, 若所述性能参数偏离所述预设目标值, 则向所述控制部件发出控制 信号, 控制所述控制部件的性能参数接近所述预设目标值。 这种液压卷扬 机构控制系统可实现液压卷扬机构的液压系统的闭环控制, 使得控制部件 始终以预设的性能参数或接近预设的性能参数的工况下工作, 控制精度较 高, 进而使得整个液压卷扬机构工作在最优的工况下, 并可实现对卷筒的 转速、 转矩的精确控制。 附图说明
图 1 为本发明所提供的液压卷扬机构控制方法的一种具体实施方式的 流程框图;
图 2为本发明所提供的液压卷扬机构控制系统的一种具体实施方式的 原理结构示意图。 具体实施方式
为了使本领域的技术人员更好的理解本发明的技术方案, 下面结合附 图和具体实施方式对本发明作进一步的详细说明。
请参考图 1,图 1为本发明所提供的液压卷扬机构控制方法的一种具体 实施方式的流程框图。
如图 1 所示, 本发明提供的用于控制液压卷扬机构的控制部件的工作 状态的液压卷扬机构控制方法, 包括以下步骤。
步骤 S11, 实时检测所述控制部件的性能参数。液压卷扬机构包括动力 源、 液压泵、 液压回路、 液压马达、 减速机、 卷筒及制动器等, 液压卷扬 机构的控制部件包括所述液压泵、 所述液压马达、 所述液压回路、 所述制 动器构; 所述液压泵的性能参数为排量 , 所述液压马达的性能参数为排 量 ,所述液压回路的性能参数为压力 p,所述制动器的性能参数为制动力 F。
具体的实施方式中, 液压泵可以采用定量泵或部分采用定量泵, 由液 压泵实时发出液压泵排量信号, 或者在液压回路中安装比例阀, 由比例阀 控制液压泵的排量, 以得到液压泵的排量 ; 可在液压回路中安装压力传 感器, 由压力传感器实时检测液压回路中的压力 P; 液压马达可以采用定量 马达或部分采用定量马达, 由液压马达发出液压马达排量信号, 或者在液 压回路中安装比例阀, 由比例阀控制液压马达的排量, 以实时得到液压马 达的排量 可采用制动压力传感器等制动力检测装置实时检测制动器的 制动力 F的大小。
步骤 S12,将所检测到的性能参数与预设目标值进行比较,若所述性能 参数偏离所述预设目标值, 则向所述控制部件发出控制信号, 控制所述控 制部件的性能参数接近所述预设目标值。
根据操作者发出的控制指令、 系统的工作状态等通过相应的算法计算 出控制部件在该工况下的最优性能参数, 将该最优性能参数设定为预设目 标值, 将步骤 S11 中所检测到的性能参数与预设目标值进行比较, 若所检 测到的性能参数偏离预设目标值, 则向控制部件发出控制信号, 控制控制 部件的性能参数接近所述预设目标值。
具体方案中, 可将所检测到的所述液压泵的排量 与预设目标值进行 比较, 若液压泵的排量 qi偏离预设目标值, 则向液压泵 (或向控制液压泵 排量的比例阀) 发出控制信号, 使得液压泵的排量 接近预设目标值; 可 将所检测到的液压马达的排量 与预设目标值进行比较, 若液压马达的排 量 偏离预设目标值, 则向液压马达 (或向控制液压马达排量的比例阀) 发出控制信号, 使得液压马达的排量 接近预设目标值; 可将所检测到的 液压回路中的压力 p与预设目标值进行比较, 若液压回路中的压力 p偏离 预设目标值, 则向液压回路中的相应控制阀发出控制信号, 使得液压回路 中的压力 p接近预设目标值; 可将所检测到的制动器的制动力 F与预设目 标值进行比较, 若制动器的制动力 F偏离预设目标值, 则向制动器发出控 制信号, 使得制动器的制动力 F接近预设目标值。
这种液压卷扬机构控制方法可实现液压卷扬机构的液压系统的闭环控 制, 使得控制部件始终以预设的性能参数或接近预设的性能参数的工况下 工作, 控制精度较高, 进而使得整个液压卷扬机构工作在最优的工况下, 并可实现对卷筒的转速、 转矩的精确控制。
优选方案中, 为了对液压卷扬机构的卷筒的转速进行精确控制, 在步 骤 S12之后还可以包括:
步骤 S13 ,实时检测液压卷扬机构的卷筒的实际转速 V,具体的方案中, 可采用使速度传感器实时检测卷筒的实际转速 V, 速度传感器可设置在减 速机上, 也可设置在卷筒上。
步骤 S14, 将所述实际转速 V与预设目标转速 V。进行比较, 若所述实 际转速 V 偏离所述预设目标转速 V。, 则根据卷筒转速计算公式
V = f(F, P, q, q2), 向一个或多个所述控制部件发出控制信号, 改变该控制 部件的性能参数, 使得所述实际转速 V接近所述预设目标转速¥。。
根据操作者发出的控制指令、 系统的工作状态等通过相应的算法计算 出卷筒在该工况下的最优转速, 将该最优转速设定为预设目标转速 v。, 将 所检测到的实际转速 V与预设目标转速 V。进行比较, 若所述实际转速 V偏 离所述预设目标转速 V。,则根据卷筒转速计算公式 V = f(F, P, q, q2),可将 液压泵的排量 ¾ι、 液压马达的排量 ¾ 2、 液压回路中的压力 P、 制动器的制动 力 F等性能参数中的一个或多个作为变量, 向液压泵、 液压马达、 液压回 路、 制动器中的一个或多个发出控制信号, 改变相应的性能参数, 以使得 实际转速 V接近所述预设目标转速 V。, 可精确控制卷筒的转度, 使卷筒的 转速始终处于最优的工况。
优选方案中, 为了对液压卷扬机构的卷筒的转矩进行精确控制, 在步 骤 S14之后还可以包括:
步骤 S15 ,实时检测液压卷扬机构的卷筒的实际转矩 T,具体的方案中, 可采用使转矩传感器实时检测卷筒的实际转矩 T,转矩传感器可设置在减速 机上, 也可设置在卷筒上。
步骤 S16, 将所述实际转矩 T与预设目标转矩 T。进行比较, 若所述实 际转矩 τ 偏离所述预设目标转矩 τ。, 则根据卷筒转矩计算公式
T = g(F, P, q, q2), 向一个或多个所述控制部件发出控制信号, 改变该控制 部件的性能参数, 使得所述实际转矩 T接近所述预设目标转矩! 。
根据操作者发出的控制指令、 系统的工作状态等通过相应的算法计算 出卷筒在该工况下的最优转矩, 将该最优转矩设定为预设目标转矩 τ。, 将 所述实际转矩 τ与预设目标转矩 Τ。进行比较, 若所述实际转矩 Τ偏离所述 预设目标转矩 Τ。, 则根据卷筒转矩计算公式 T = g(F, P, q, q2), 可将液压泵 的排量 q 液压马达的排量 、 液压回路中的压力 P、制动器的制动力 F等 性能参数中的一个或多个作为变量, 向液压泵、 液压马达、 液压回路、 制 动器中的一个或多个发出控制信号, 改变相应的性能参数, 以使得实际转 矩 τ接近所述预设目标转矩 τ。, 可精确控制卷筒的转矩, 使卷筒的转矩始 终处于最优的工况。
具体的方案中, 所述制动器为设置在所述卷筒上的卷筒制动器。 所述 制动器还可以为设置在所述液压马达动力输出端上的电磁制动器, 控制电 磁制动器的制动力大小时, 可向用于控制该电磁制动器的电磁阀发出控制 信号, 通过控制电磁阀的开度控制电磁制动器的制动力的大小。
上述实施例中, 步骤 S15、 步骤 S16位于步骤 S14之后, 本发明所提 供的液压卷扬机构控制方法并不局限于此, 本发明对步骤 S15、 步骤 S16 与步骤 S13、 步骤 S14的执行顺序不做限制, 步骤 S12之后还可以直接执 行步骤 S15、 步骤 S16, 步骤 S16之后可再执行步骤 S13、 步骤 S14; 或者 步骤 S12之后, 步骤 S13、 步骤 S14与步骤 S15、 步骤 S16可同步执行, 可 以理解,步骤 S13之后必须执行步骤 S14,步骤 S15之后必须执行步骤 S16, 以上几种方案均应在本发明的保护范围内。
优选方案中, 当液压系统出现故障时, 为了能够及时判断故障, 在步 骤 S11之后、 步骤 S12之前还可以包括:
步骤 S11 (该步骤未能在附图 1中显示), 将所检测到的性能参数与预 设阀值进行比较, 若所述性能参数大于所述预设阀值, 则发出报警或 /并控 制该液压卷扬机构停止工作。 液压系统的各部分液压回路均具有正常工作 压力范围, 各若测量到的压力脱离该工作压力范围或突然大范围变化, 就 反应液压系统中出现了问题, 可将所检测到性能参数与预设阀值比较, 若 大于该预设阀值, 则可判断液压系统出现了泄漏、 超压、 磨损等故障, 可 发出报警或 /并控制该液压卷扬机构停止工作, 从而可避免事故发生或器件 的严重损坏。
优选方案中, 步骤 S13之后、 步骤 S14之前还包括:
步骤 S131 (该步骤未能在附图 1 中显示), 将所检测到的实际转速 V 与预设阀值进行比较, 若所述实际转速 V大于所述预设阀值, 则发出报警 或 /并控制该液压卷扬机构停止工作。 若卷筒的转速超过正常工作范围, 则 可判断液压卷扬机构出现了故障, 此时可发出报警信号 /并控制该液压卷扬 机构停止工作, 从而可避免事故发生或器件的严重损坏。
优选方案中, 步骤 S15之后、 步骤 S16之前还包括:
步骤 S151 (该步骤未能在附图 1 中显示), 将所检测到的实际转矩 T 与预设阀值进行比较, 若所述实际转矩 T大于所述预设阀值, 则发出报警 信号或 /并控制该液压卷扬机构停止工作。若卷筒的转矩超过正常工作范围, 则可判断液压卷扬机构出现了故障, 此时可发出报警信号 /并控制该液压卷 扬机构停止工作, 从而可避免事故发生或器件的严重损坏。
本发明还提供了一种液压卷扬机构控制系统, 包括检测装置、 控制器。 检测装置用于实时检测所述控制部件的性能参数。 液压卷扬机构包括 动力源、 液压泵、 液压回路、 液压马达、 减速机、 卷筒及制动器等, 液压 卷扬机构的控制部件包括所述液压泵、 所述液压马达、 所述液压回路、 所 述制动器构; 所述液压泵的性能参数为排量 ^, 所述液压马达的性能参数 为排量 ,所述液压回路的性能参数为压力 p,所述制动器的性能参数为制 动力 F。
具体的实施方式中, 液压泵可以采用定量泵或部分采用定量泵, 由液 压泵实时发出液压泵排量信号, 或者在液压回路中安装比例阀, 由比例阀 控制液压泵的排量, 以得到液压泵的排量 ; 可在液压回路中安装压力传 感器, 由压力传感器实时检测液压回路中的压力 P; 液压马达可以采用定量 马达或部分采用定量马达, 由液压马达发出液压马达排量信号, 或者在液 压回路中安装比例阀, 由比例阀控制液压马达的排量, 以实时得到液压马 达的排量 可采用制动压力传感器等制动力检测装置实时检测制动器的 制动力 F的大小。
控制器, 用于接收所述检测装置发出的检测信号, 将所检测到的性能 参数与预设目标值进行比较, 若所述性能参数偏离所述预设目标值, 则向 所述控制部件发出控制信号, 控制所述控制部件的性能参数接近所述预设 目标值。
控制器根据操作者发出的控制指令、 系统的工作状态等通过相应的算 法计算出控制部件在该工况下的最优性能参数, 将该最优性能参数设定为 预设目标值, 将所检测到的性能参数与预设目标值进行比较, 若所检测到 的性能参数偏离预设目标值, 则向控制部件发出控制信号, 控制控制部件 的性能参数接近所述预设目标值。
具体方案中, 控制器接收液压泵的排量信号, 可将所检测到的所述液 压泵的排量 与预设目标值进行比较, 若液压泵的排量 偏离预设目标值, 则向液压泵 (或向控制液压泵排量的比例阀) 发出控制信号, 使得液压泵 的排量 接近预设目标值。
控制器接收液压马达的排量信号, 可将所检测到的液压马达的排量 与预设目标值进行比较, 若液压马达的排量 偏离预设目标值, 则向液压 马达 (或向控制液压马达排量的比例阀) 发出控制信号, 使得液压马达的 排量 接近预设目标值。
控制器接收压力信号, 可将所检测到的液压回路中的压力 p与预设目 标值进行比较, 若液压回路中的压力 p偏离预设目标值, 则向液压回路中 的相应控制阀发出控制信号, 使得液压回路中的压力 p接近预设目标值。
控制器接收制动力信号, 可将所检测到的制动器的制动力 F与预设目 标值进行比较, 若制动器的制动力 F偏离预设目标值, 则向制动器发出控 制信号, 使得制动器的制动力 F接近预设目标值。
这种液压卷扬机构控制系统可实现液压卷扬机构的液压系统的闭环控 制, 使得控制部件始终以预设的性能参数或接近预设的性能参数的工况下 工作, 控制精度较高, 进而使得整个液压卷扬机构工作在最优的工况下, 并可实现对卷筒的转速、 转矩的精确控制。
优选方案中, 为了对液压卷扬机构的卷筒的转速进行精确控制, 所述 检测装置还包括速度传感器, 所述速度传感器用于实时检测液压卷扬机构 的卷筒的实际转速 V, 速度传感器可设置在减速机上, 也可设置在卷筒上; 控制器接收速度传感器发出的转速信号, 将所述实际转速 V与预设目标转 速 V。进行比较, 若所述实际转速 V偏离所述预设目标转速 v。, 则根据卷筒 转速计算公式 V = f (F, P, q, q2), 向一个或多个所述控制部件发出控制信 号, 改变该控制部件的性能参数, 使得所述实际转速 V接近所述预设目标 转速 v。。
控制器根据操作者发出的控制指令、 系统的工作状态等通过相应的算 法计算出卷筒在该工况下的最优转速, 将该最优转速设定为预设目标转速 v。, 将所检测到的实际转速 V与预设目标转速 V。进行比较, 若所述实际转 速 V 偏离所述预设目标转速 v。 , 则根据卷筒转速计算公式 v = f(F, p, ¾1, q2), 可将液压泵的排量 q、 液压马达的排量 、 液压回路中 的压力 p、制动器的制动力 F等性能参数中的一个或多个作为变量, 向液压 泵、 液压马达、 液压回路、 制动器中的一个或多个发出控制信号, 改变相 应的性能参数, 以使得实际转速 V接近所述预设目标转速¥。, 可精确控制 卷筒的转度, 使卷筒的转速始终处于最优的工况。
优选方案中, 为了对液压卷扬机构的卷筒的转矩进行精确控制, 所述 检测装置还包括转矩传感器, 所述转矩传感器用于实时检测液压卷扬机构 的卷筒的实际转矩 τ, 转矩传感器可设置在减速机上, 也可设置在卷筒上; 控制器接收所述转矩传感器发出的转矩信号, 将所述实际转矩 τ与预设目 标转矩 T。进行比较, 若所述实际转矩 T偏离所述预设目标转矩 τ。, 则根据 卷筒转矩计算公式 T = g(F, P, q, q2),向一个或多个所述控制部件发出控制 信号, 改变该控制部件的性能参数, 使得所述实际转矩 T接近所述预设目 标转矩 T。。
控制器根据操作者发出的控制指令、 系统的工作状态等通过相应的算 法计算出卷筒在该工况下的最优转矩, 将该最优转矩设定为预设目标转矩 Τ。, 将所述实际转矩 Τ与预设目标转矩 Τ。进行比较, 若所述实际转矩 Τ偏 离所述预设目标转矩 Τ。, 则根据卷筒转矩计算公式 T = g(F, P, q, q2), 可将 液压泵的排量 ^、 液压马达的排量 、 液压回路中的压力 P、 制动器的制动 力 F等性能参数中的一个或多个作为变量, 向液压泵、 液压马达、 液压回 路、 制动器中的一个或多个发出控制信号, 改变相应的性能参数, 以使得 实际转矩 T接近所述预设目标转矩 T。, 可精确控制卷筒的转矩, 使卷筒的 转矩始终处于最优的工况。
具体的方案中, 所述制动器为设置在所述卷筒上的卷筒制动器。 所述 制动器还可以为设置在所述液压马达动力输出端上的电磁制动器, 控制电 磁制动器的制动力大小时, 可向用于控制该电磁制动器的电磁阀发出控制 信号, 通过控制电磁阀的开度控制电磁制动器的制动力的大小。 所述制动 器还可以同时包括卷筒制动器和电磁制动器。
优选方案中, 当液压系统出现故障时, 为了能够及时判断故障, 还包 括报警装置, 该报警装置用于接收所述控制器发出的报警信号。
控制器将所检测到的性能参数与预设阀值进行比较, 若所述性能参数 大于所述预设阀值, 则向所述报警装置发出报警信号, 或 /并控制该液压卷 扬机构停止工作。 液压系统的各部分液压回路均具有正常工作压力范围, 各若测量到的压力脱离该工作压力范围或突然大范围变化, 就反应液压系 统中出现了问题, 可将所检测到性能参数与预设阀值比较, 若大于该预设 阀值, 则可判断液压系统出现了泄漏、 超压、 磨损等故障, 从而可避免事 故发生或器件的严重损坏。
优选方案中, 控制器将所检测到的实际转速 V与预设阀值进行比较, 若所述实际转速 V大于所述预设阀值,则发出所述报警装置发出报警信号, 或 /并控制该液压卷扬机构停止工作。 若卷筒的转速超过正常工作范围, 则 可判断液压卷扬机构出现了故障, 此时可发出报警信号 /并控制该液压卷扬 机构停止工作, 从而可避免事故发生或器件的严重损坏。
优选方案中, 控制器将所检测到的实际转矩 τ与预设阀值进行比较, 若所述实际转矩 τ大于所述预设阀值, 则向所述报警装置发出报警信号, 或 /并控制该液压卷扬机构停止工作。 若卷筒的转矩超过正常工作范围, 则 可判断液压卷扬机构出现了故障, 从而可避免事故发生或器件的严重损坏。
本文中应用了具体个例对本发明的原理及实施方式进行了阐述, 以上 实施例的说明只是用于帮助理解本发明的方法及其核心思想。 应当指出, 对于本技术领域的普通技术人员来说, 在不脱离本发明原理的前提下, 还 可以对本发明进行若干改进和修饰, 这些改进和修饰也落入本发明权利要 求的保护范围内。

Claims

权利要求
1、 一种液压卷扬机构控制方法, 用于控制液压卷扬机构的控制部件的 工作状态, 其特征在于, 包括以下步骤:
步骤 A、 实时检测所述控制部件的性能参数;
步骤 B, 将所检测到的性能参数与预设目标值进行比较, 若所述性能 参数偏离所述预设目标值, 则向所述控制部件发出控制信号, 控制所述控 制部件的性能参数接近所述预设目标值。
2、 根据权利要求 1所述的液压卷扬机构控制方法, 其特征在于, 所述 控制部件包括液压泵、 液压马达、 液压回路、 制动器; 所述液压泵的性能 参数为排量 , 所述液压马达的性能参数为排量 , 所述液压回路的性能 参数为压力 p, 所述制动器的性能参数为制动力 F。
3、 根据权利要求 2所述的液压卷扬机构控制方法, 其特征在于, 所述 步骤 B之后还包括:
步骤 C, 实时检测液压卷扬机构的卷筒的实际转速 V;
步骤 D, 将所述实际转速 V与预设目标转速 V。进行比较, 若所述实际 转速 V 偏离所述预设目标转速 V。, 则根据卷筒转速计算公式
V = f(F, P, q, q2), 向一个或多个所述控制部件发出控制信号, 改变该控制 部件的性能参数, 使得所述实际转速 V接近所述预设目标转速 V。。
4、 根据权利要求 2或 3所述的液压卷扬机构控制方法, 其特征在于, 所述步骤 B之后或所述步骤 D之后, 还包括:
步骤 E, 实时检测卷扬机构的卷筒的实际转矩 T;
步骤 F, 将所述实际转矩 T与预设目标转矩 T。进行比较, 若所述实际 转矩 τ 偏离所述预设目标转矩 τ。, 则根据卷筒转矩计算公式
T = g(F, P, q, q2), 向一个或多个所述控制部件发出控制信号, 改变该控制 部件的性能参数, 使得所述实际转矩 T接近所述预设目标转矩! 。
5、 根据权利要求 1所述的液压卷扬机构控制方法, 其特征在于, 所述 步骤 A之后、 步骤 B之前还包括:
步骤 A1 , 将所检测到的性能参数与预设阀值进行比较, 若所述性能参 数大于所述预设阀值,则发出报警信号或 /并控制该液压卷扬机构停止工作。
6、 根据权利要求 3所述的液压卷扬机构控制方法, 其特征在于, 所述 步骤 C之后、 步骤 D之前还包括:
步骤 C1 , 将所检测到的实际转速 V与预设阀值进行比较, 若所述实际 转速 V大于所述预设阀值, 则发出报警信号或 /并控制该液压卷扬机构停止 工作。
7、 根据权利要求 4所述的液压卷扬机构的控制方法, 其特征在于, 所 述步骤 E之后、 步骤 F之前还包括:
步骤 E1 , 将所检测到的实际转矩 T与预设阀值进行比较, 若所述实际 转矩 T大于所述预设阀值, 则发出报警信号或 /并控制该液压卷扬机构停止 工作。
8、 一种液压卷扬机构的控制系统, 用于控制液压卷扬机构的控制部件 的工作状态, 其特征在于, 包括:
检测装置, 用于实时检测所述控制部件的性能参数, 并向控制器发出 检测信号;
控制器, 用于接收所述检测信号, 将所检测到的性能参数与预设目标 值进行比较, 若所述性能参数偏离所述预设目标值, 则向所述控制部件发 出控制信号, 控制所述控制部件的性能参数接近所述预设目标值。
9、 根据权利要求 8所述的液压卷扬机构控制系统, 其特征在于, 所述 控制部件包括液压泵、 液压马达、 液压回路、 制动器; 所述液压泵的性能 参数为排量 , 所述液压马达的性能参数为排量 , 所述液压回路的性能 参数为压力 p, 所述制动器的性能参数为制动力 F。
10、 根据权利要求 9所述的液压卷扬机构控制系统, 其特征在于, 所 述液压泵为定量泵。
11、 根据权利要求 9所述的液压卷扬机构控制系统, 其特征在于, 所 述检测装置包括压力传感器, 所述压力传感器用于检测液压回路的压力 P。
12、 根据权利要求 9所述的液压卷扬机构控制系统, 其特征在于, 所 述检测装置还包括速度传感器, 所述速度传感器用于实时检测液压卷扬机 构的卷筒的实际转速 V。
13、 根据权利要求 9所述的液压卷扬机构控制系统, 其特征在于, 所 述检测装置还包括转矩传感器, 所述转矩传感器用于实时检测液压卷扬机 构的卷筒的实际转矩 T。
14、 根据权利要求 8所述的液压卷扬机构控制系统, 其特征在于, 还 包括报警装置, 该报警装置用于接收所述控制器发出的报警信号。
15、 根据权利要求 9所述的液压卷扬机构的控制方法, 其特征在于, 所述制动器为设置在所述卷筒上的卷筒制动器。
16、根据权利要求 9或 15所述的液压卷扬机构控制系统,其特征在于, 所述制动器为设置在所述液压马达动力输出端上的电磁制动器。
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