CN107032265A - It is a kind of to be used for the direct electric drive pump control energy conserving system of double mast forklift trucks - Google Patents
It is a kind of to be used for the direct electric drive pump control energy conserving system of double mast forklift trucks Download PDFInfo
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- CN107032265A CN107032265A CN201710307970.XA CN201710307970A CN107032265A CN 107032265 A CN107032265 A CN 107032265A CN 201710307970 A CN201710307970 A CN 201710307970A CN 107032265 A CN107032265 A CN 107032265A
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- 230000001360 synchronised effect Effects 0.000 claims abstract description 35
- 230000001172 regenerating effect Effects 0.000 claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 claims description 21
- 239000000523 sample Substances 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 abstract description 7
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 46
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/205—Arrangements for transmitting pneumatic, hydraulic or electric power to movable parts or devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Physics & Mathematics (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Analytical Chemistry (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
本发明涉及叉车液压节能领域，特别是涉及一种用于双门架叉车的节能系统。它包括泵驱动控制组件、控制安全阀组件、执行组件和传感控制组件。泵驱动控制组件包括上位机、连接面板、再生制动变频器、永磁同步电动机和液压泵；控制安全阀组件包括双向常闭提升安全阀、三位四通电磁换向阀和减压阀；执行组件包括第一单作用液压缸、分流集流平衡阀和第二单作用液压缸等。本发明具有的有益效果是：双门架在各自的上升区域提升运动时，利用再生制动变频器控制对永磁同步电动机的供电频率，使永磁同步电动机驱动液压泵输出的液压油的流量和压力与实际工作所需要的流量压力相匹配，避免了不必要的能量浪费，提高能量利用率，减少有害物质的排放。
The invention relates to the field of forklift hydraulic energy saving, in particular to an energy saving system for double mast forklifts. It includes pump drive control components, control safety valve components, executive components and sensing control components. The pump drive control components include upper computer, connection panel, regenerative braking frequency converter, permanent magnet synchronous motor and hydraulic pump; the control safety valve components include two-way normally closed lift safety valve, three-position four-way electromagnetic reversing valve and pressure reducing valve; The executive assembly includes a first single-acting hydraulic cylinder, a diverter-collection balance valve, a second single-acting hydraulic cylinder, and the like. The beneficial effect of the present invention is: when the double gantry lifts in the respective rising areas, the regenerative braking frequency converter is used to control the frequency of power supply to the permanent magnet synchronous motor, so that the permanent magnet synchronous motor drives the hydraulic oil flow output by the hydraulic pump Matching the pressure with the flow pressure required by the actual work avoids unnecessary waste of energy, improves energy utilization and reduces the emission of harmful substances.
Description
技术领域technical field
本发明涉及叉车液压节能领域，特别是涉及一种用于双门架叉车的节能系统。The invention relates to the field of forklift hydraulic energy saving, in particular to an energy saving system for double mast forklifts.
背景技术Background technique
在叉车等行走式工程机械中，如双门架叉车，由于内门架和外门架分别承担不同提升阶段的升举功能，所以内门架和外门架对应的驱动油缸具有不同的升降速度和不同的位移量。现有技术中的双门架叉车的液压系统能量利用率较低：1、在两门架的上升过程中，无法实现液压泵输出的流量、压力与实际工作的液压油路所需要的流量、压力相匹配，而造成能量的浪费；2、为了保证两门架以适当的速度平稳下降，现有技术常使高压油液直接通过节流阀节流口回油箱，这种节流调速的方式，容易使高压油液在节流过程中产生大量热量，导致液压系统油温升高，造成能量的浪费，并且容易导致液压元件的老化损坏；3、两门架在下降过程中，驱动液压泵的电机处于制动状态，返回的高压油液还会驱动电机反转，带动电机发电，电机旋转的动能被损失掉，并且下降中的两门架的高位势能也被浪费掉。In walking construction machinery such as forklifts, such as double-gantry forklifts, since the inner mast and the outer mast are respectively responsible for the lifting functions of different lifting stages, the driving cylinders corresponding to the inner mast and the outer mast have different lifting speeds. and different displacements. The energy utilization rate of the hydraulic system of the double mast forklift in the prior art is low: 1. During the rising process of the two masts, it is impossible to realize the output flow and pressure of the hydraulic pump and the flow and pressure required by the actual working hydraulic oil circuit. 2. In order to ensure that the two masts descend steadily at an appropriate speed, the existing technology often makes the high-pressure oil return to the oil tank directly through the throttle port of the throttle valve. This throttling speed regulation way, it is easy to make the high-pressure oil generate a lot of heat during the throttling process, resulting in an increase in the oil temperature of the hydraulic system, resulting in a waste of energy, and it is easy to cause aging and damage to the hydraulic components; The motor of the pump is in the braking state, and the returned high-pressure oil will also drive the motor to reverse and drive the motor to generate electricity. The kinetic energy of the motor rotation is lost, and the high-level potential energy of the falling two masts is also wasted.
因此，对于双门架叉车，需要设计一种新的液压系统，实现对内门架和外门架在不同提升阶段的驱动，并实现动能和势能的回收利用，提高能量利用率。Therefore, for a double-mast forklift, it is necessary to design a new hydraulic system to drive the inner and outer masts at different lifting stages, and realize the recovery of kinetic energy and potential energy to improve energy utilization.
发明内容Contents of the invention
本发明要解决的问题就是针对以上不足而提供一种用于双门架叉车的能对门架高位势能和电机转子动能量进行有效回收利用的节能系统。其技术方案如下：The problem to be solved by the present invention is to provide an energy-saving system for a double-gantry forklift that can effectively recycle the high-level potential energy of the mast and the kinetic energy of the motor rotor to address the above shortcomings. Its technical scheme is as follows:
它包括泵驱动控制组件、控制安全阀组件、执行组件和传感控制组件，其关键技术在于：It includes pump drive control components, control safety valve components, executive components and sensor control components, and its key technologies are:
所述泵驱动控制组件包括上位机、连接面板、再生制动变频器、永磁同步电机和液压泵，上位机通过连接面板连接再生制动变频器，再生制动变频器连接永磁同步电机，永磁同步电机连接液压泵；The pump drive control component includes a host computer, a connection panel, a regenerative braking frequency converter, a permanent magnet synchronous motor and a hydraulic pump. The host computer is connected to the regenerative braking frequency converter through the connection panel, and the regenerative braking frequency converter is connected to the permanent magnet synchronous motor. The permanent magnet synchronous motor is connected to the hydraulic pump;
所述控制安全阀组件包括双向常闭提升安全阀、三位四通电磁换向阀和减压阀，双向常闭提升安全阀的进油口和减压阀的进油口分别连接到液压泵的出油口，双向常闭提升安全阀的出油口与三位四通电磁换向阀的进油口连通；The control safety valve assembly includes a two-way normally closed lift safety valve, a three-position four-way electromagnetic reversing valve and a pressure reducing valve, and the oil inlet of the two-way normally closed lift safety valve and the oil inlet of the pressure reducing valve are respectively connected to the hydraulic pump The oil outlet of the two-way normally closed lift safety valve is connected with the oil inlet of the three-position four-way electromagnetic reversing valve;
所述执行组件包括第一单作用液压缸、分流集流平衡阀和第二单作用液压缸，所述三位四通电磁换向阀的两个工作油口分别连接第一单作用液压缸的无杆腔和分流集流平衡阀进油口，分流集流平衡阀的两个出油口分别连接两个第二单作用液压缸的无杆腔，所述第一单作用液压缸驱动叉车内门架，第二单作用液压缸驱动叉车外门架；The executive assembly includes a first single-acting hydraulic cylinder, a diverting flow-collecting balance valve and a second single-acting hydraulic cylinder, and the two working oil ports of the three-position four-way electromagnetic reversing valve are respectively connected to the The rodless chamber and the oil inlet port of the diversion-collection balance valve, the two oil outlets of the diversion-concentration balance valve are respectively connected to the rodless chambers of the two second single-acting hydraulic cylinders, and the first single-acting hydraulic cylinder drives the forklift Mast, the second single-acting hydraulic cylinder drives the outer mast of the forklift;
所述传感控制组件包括第一压力传感器、第二压力传感器、第一SGW/SGI位移编码器和第二SGW/SGI位移编码器，第一压力传感器设置在液压泵的出油口和双向常闭提升安全阀进油口之间的油路上，第二压力传感器设置在双向常闭提升安全阀与所述三位四通电磁换向阀之间的油路上，第二SGW/SGI位移编码器与所述分流集流平衡阀的进油口连通，第一SGW/SGI位移编码器连接在三位四通电磁换向阀与第一单作用液压缸之间的油路上；The sensing control assembly includes a first pressure sensor, a second pressure sensor, a first SGW/SGI displacement encoder and a second SGW/SGI displacement encoder, and the first pressure sensor is arranged at the oil outlet of the hydraulic pump and the bidirectional normal The second pressure sensor is set on the oil circuit between the two-way normally closed lift safety valve and the three-position four-way electromagnetic directional valve, and the second SGW/SGI displacement encoder It communicates with the oil inlet port of the split-flow-collection balance valve, and the first SGW/SGI displacement encoder is connected to the oil circuit between the three-position four-way electromagnetic reversing valve and the first single-acting hydraulic cylinder;
所述双向常闭提升安全阀和三位四通电磁换向阀之间的油路上连接蓄能器。An accumulator is connected on the oil circuit between the two-way normally closed lifting safety valve and the three-position four-way electromagnetic reversing valve.
进一步，再生制动变频器包括并联的制动电阻Rbrake和并联的储电电容；Further, the regenerative braking frequency converter includes a parallel braking resistor R brake and a parallel storage capacitor;
进一步，再生制动变频器通过相电流探头和相电压探头连接永磁同步电机。Further, the regenerative braking frequency converter is connected to the permanent magnet synchronous motor through a phase current probe and a phase voltage probe.
进一步，永磁同步电机带有旋转变压器。Further, the permanent magnet synchronous motor has a resolver.
进一步，第一压力传感器还与减压阀连接。Further, the first pressure sensor is also connected with the decompression valve.
进一步，第一压力传感器、第二压力传感器、第二SGW/SGI位移编码器和第一SGW/SGI位移编码器均连接到连接面板上。Further, the first pressure sensor, the second pressure sensor, the second SGW/SGI displacement encoder and the first SGW/SGI displacement encoder are all connected to the connection panel.
进一步，上位机具有磁盘空间管理命令模块和可编程计算机控制器。Further, the upper computer has a disk space management command module and a programmable computer controller.
进一步，蓄能器是弹簧式蓄能器或者隔膜式蓄能器。Further, the accumulator is a spring accumulator or a diaphragm accumulator.
进一步，制动电阻Rbrake利用开关实现通断控制。Further, the braking resistor R brake uses a switch to realize on-off control.
与现有技术相比，本发明具有如下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
1、双门架在各自的上升区域提升运动时，利用再生制动变频器控制对永磁同步电机的供电频率，使永磁同步电机驱动液压泵输出的液压油的流量和压力与实际工作所需要的流量压力相匹配，避免了不必要的能量浪费，提高能量利用率，减少有害物质的排放。1. When the double masts are lifting in their respective rising areas, use the regenerative braking frequency converter to control the frequency of power supply to the permanent magnet synchronous motor, so that the flow and pressure of the hydraulic oil output by the permanent magnet synchronous motor driven by the hydraulic pump are consistent with the actual working conditions The required flow pressure is matched to avoid unnecessary waste of energy, improve energy utilization and reduce the emission of harmful substances.
2、在双门架下降时，利用蓄能器对第一单作用液压缸和第二单作用液压缸中高压油液的压力能进行回收存储；对永磁同步电机制动，并且高压油液推动液压泵反转作为液压马达推动永磁同步电机转动，永磁同步电机发电产生再生电能，可以利用再生制动变频器采用耗能制动，利用制动电阻消耗永磁同步电机反转产生的再生电能，使直流电压UDC处于正常状态，保护再生制动变频器，也可以利用储能电容将永磁同步电机反转产生的再生电能存储，当门架上升时，作为辅助电源向永磁同步电机供电，有利于节能；2. When the double mast is lowered, use the accumulator to recover and store the pressure energy of the high-pressure oil in the first single-acting hydraulic cylinder and the second single-acting hydraulic cylinder; brake the permanent magnet synchronous motor, and the high-pressure oil Promote the reverse rotation of the hydraulic pump as a hydraulic motor to drive the permanent magnet synchronous motor to rotate, and the permanent magnet synchronous motor generates regenerative electric energy. The regenerative braking inverter can be used for energy consumption braking, and the braking resistor can be used to consume the permanent magnet synchronous motor reversed. Regenerate electric energy, make the DC voltage U DC in a normal state, protect the regenerative braking inverter, and also use the energy storage capacitor to store the regenerative electric energy generated by the reverse rotation of the permanent magnet synchronous motor. When the mast rises, it is used as an auxiliary power supply to the permanent magnet Synchronous motor power supply is beneficial to energy saving;
3、在双门架下降时，利用再生制动变频器的调速和降压阀降压作用后，高压油液返回油箱，避免了传统的节流调速产生的热量，而带来油液温度的升高和能量的浪费。3. When the double mast is lowered, the high-pressure oil returns to the oil tank after the speed regulation of the regenerative braking frequency converter and the pressure reduction function of the pressure relief valve are used to reduce the pressure, which avoids the heat generated by the traditional throttling speed regulation and brings oil Increase in temperature and waste of energy.
附图说明Description of drawings
图1，为本发明的用于双门架叉车的直接电驱动泵控节能系统图。Fig. 1 is a diagram of a direct electric drive pump control energy-saving system for a double mast forklift according to the present invention.
具体实施方式detailed description
如图1所示，本发明包括泵驱动控制组件、控制安全阀组件、执行组件和传感控制组件，其关键技术在于：As shown in Figure 1, the present invention includes a pump drive control assembly, a control safety valve assembly, an executive assembly and a sensor control assembly, and its key technologies lie in:
所述泵驱动控制组件包括上位机1、连接面板2、再生制动变频器3、带旋转变压器的永磁同步电机4和液压泵5，上位机1通过连接面板2连接再生制动变频器3，再生制动变频器3的相电流探头18和相电压探头19连接带旋转变压器的永磁同步电机4，带旋转变压器的永磁同步电机4通过联轴器连接液压泵5；The pump drive control assembly includes an upper computer 1, a connection panel 2, a regenerative braking frequency converter 3, a permanent magnet synchronous motor with a resolver 4 and a hydraulic pump 5, and the upper computer 1 is connected to the regenerative braking frequency converter 3 through the connection panel 2 , the phase current probe 18 and the phase voltage probe 19 of the regenerative braking frequency converter 3 are connected to the permanent magnet synchronous motor 4 with a resolver, and the permanent magnet synchronous motor 4 with a resolver is connected to the hydraulic pump 5 through a coupling;
所述控制安全阀组件包括双向常闭提升安全阀6、三位四通电磁换向阀7和减压阀11，双向常闭提升安全阀6的进油口和减压阀11的进油口分别连接到液压泵5的出油口，双向常闭提升安全阀6的出油口与三位四通电磁换向阀7的进油口连通；The control safety valve assembly includes a two-way normally closed lifting safety valve 6, a three-position four-way electromagnetic reversing valve 7 and a pressure reducing valve 11, the oil inlet of the two-way normally closed lifting safety valve 6 and the oil inlet of the pressure reducing valve 11 Connected to the oil outlet of the hydraulic pump 5 respectively, the oil outlet of the two-way normally closed lift safety valve 6 communicates with the oil inlet of the three-position four-way electromagnetic reversing valve 7;
所述执行组件包括一个第一单作用液压缸8、分流集流平衡阀9和两个第二单作用液压缸10，所述三位四通电磁换向阀7的两个工作油口分别连接第一单作用液压缸8的无杆腔和分流集流平衡阀9进油口，分流集流平衡阀9的两个出油口分别连接两个第二单作用液压缸10的无杆腔，所述第一单作用液压缸8驱动叉车内门架，叉车的内门架在第一提升区域内运动，第二单作用液压缸10驱动叉车外门架的稳定上升，叉车的外门架在第二提升区域内运动；The executive assembly includes a first single-acting hydraulic cylinder 8, a diverting flow-collecting balance valve 9 and two second single-acting hydraulic cylinders 10, and the two working oil ports of the three-position four-way electromagnetic reversing valve 7 are respectively connected to The rodless chamber of the first single-acting hydraulic cylinder 8 and the oil inlet port of the diversion-collection balance valve 9, the two oil outlets of the diversion-concentration balance valve 9 are respectively connected to the rodless chambers of the two second single-acting hydraulic cylinders 10, The first single-acting hydraulic cylinder 8 drives the inner mast of the forklift, and the inner mast of the forklift moves in the first lifting area, and the second single-acting hydraulic cylinder 10 drives the stable rise of the outer mast of the forklift, and the outer mast of the forklift moves in the first lifting area. Movement in the second lifting area;
所述传感控制组件包括第一压力传感器13、第二压力传感器14、第一SGW/SGI位移编码器21和第二SGW/SGI位移编码器15，第一压力传感器13设置在液压泵5的出油口和双向常闭提升安全阀6进油口之间的油路上，第一压力传感器13还与减压阀11连接，第二压力传感器14设置在双向常闭提升安全阀6与所述三位四通电磁换向阀7之间的油路上，第二SGW/SGI位移编码器15与所述分流集流平衡阀9的进油口连通，第一SGW/SGI位移编码器21连接在三位四通电磁换向阀7与第一单作用液压缸8之间的油路上，第一压力传感器13、第二压力传感器14、第二SGW/SGI位移编码器15和第一SGW/SGI位移编码器21均连接到连接面板2上；The sensing control assembly includes a first pressure sensor 13, a second pressure sensor 14, a first SGW/SGI displacement encoder 21 and a second SGW/SGI displacement encoder 15, and the first pressure sensor 13 is arranged on the hydraulic pump 5 On the oil path between the oil outlet and the oil inlet of the bidirectional normally closed poppet safety valve 6, the first pressure sensor 13 is also connected to the pressure reducing valve 11, and the second pressure sensor 14 is arranged between the bidirectional normally closed poppet safety valve 6 and the On the oil circuit between the three-position four-way electromagnetic reversing valve 7, the second SGW/SGI displacement encoder 15 communicates with the oil inlet port of the diversion-collection balance valve 9, and the first SGW/SGI displacement encoder 21 is connected to On the oil circuit between the three-position four-way electromagnetic reversing valve 7 and the first single-acting hydraulic cylinder 8, the first pressure sensor 13, the second pressure sensor 14, the second SGW/SGI displacement encoder 15 and the first SGW/SGI The displacement encoders 21 are all connected to the connecting panel 2;
所述双向常闭提升安全阀6和三位四通电磁换向阀7之间的油路上连接蓄能器20。An accumulator 20 is connected to the oil circuit between the two-way normally closed lift safety valve 6 and the three-position four-way electromagnetic reversing valve 7 .
进一步，再生制动变频器3包括并联的制动电阻Rbrake16和并联的储电电容，制动电阻Rbrake16利用开关实现通断控制Further, the regenerative braking frequency converter 3 includes a parallel braking resistor R brake 16 and a parallel storage capacitor, and the braking resistor R brake 16 uses a switch to realize on-off control
进一步，上位机1具有磁盘空间管理命令模块和可编程计算机控制器。Further, the host computer 1 has a disk space management command module and a programmable computer controller.
进一步，蓄能器20是弹簧式蓄能器或者隔膜式蓄能器。Further, the accumulator 20 is a spring accumulator or a diaphragm accumulator.
本发明用于双门架叉车的直接电驱动泵控节能系统主要的工作过程如下：The main working process of the direct electric drive pump control energy-saving system used in the double mast forklift of the present invention is as follows:
1、双门架在各自的上升区域提升运动时，上位机1打开三相交流电源，并向再生制动变频器3发出控制指令，利用再生制动变频器3控制对永磁同步电机4的供电频率，使永磁同步电机4驱动液压泵5输出的液压油的流量和压力与实际工作所需要的流量压力相匹配，驱动第一单作用液压缸8在第一上升区域内上升；然后，调节三位四通电磁换向阀7，再驱动第二单作用液压缸10在第二上升区域内上升，避免了不必要的能量浪费，提高能量利用率。1. When the double masts are moving in their respective rising areas, the upper computer 1 turns on the three-phase AC power supply, and sends a control command to the regenerative braking inverter 3, and uses the regenerative braking inverter 3 to control the rotation of the permanent magnet synchronous motor 4. The power supply frequency makes the flow and pressure of the hydraulic oil output by the permanent magnet synchronous motor 4 drive the hydraulic pump 5 match the flow pressure required by the actual work, and drives the first single-acting hydraulic cylinder 8 to rise in the first rising area; then, Adjust the three-position four-way electromagnetic reversing valve 7, and then drive the second single-acting hydraulic cylinder 10 to rise in the second rising area, avoiding unnecessary waste of energy and improving energy utilization.
2、在双门架下降时，利用蓄能器20对第一单作用液压缸8和第二单作用液压缸10中高压油液的压力能进行回收存储；电源停止对永磁同步电机4供电，处于制动状态的永磁同步电机转子由于惯性作用正在旋转，但此时会产生电能，高压油液一部分经减压阀11回流到油箱，另一部分驱动液压泵5作为马达反转，带动永磁同步电机4转动，此时永磁同步电机4相当于发电机，永磁同步电机4发电产生再生电能，当需要快速制动时，可以接通并联制动电阻Rbrake的开关，利用再生制动变频器采用耗能制动，永磁同步电机4产生的再生电能转化为制动电阻Rbrake的热量，同时永磁同步电机转子受力制动，利用制动电阻消耗永磁同步电机4转动产生的再生电能，使直流电压UDC17处于正常状态，保护再生制动变频器3；如果电源的稳定性较好，门架下降时，可以断开制动电阻的控制开关，永磁同步电机转动产生的交流电AC，逆变为直流电DC，利用储能电容将永磁同步电机反转产生的再生电能存储，当门将上升时，直流电DC逆变为交流电AC，储能电容作为辅助电源向永磁同步电机供电，有利于能量的回收利用。2. When the double mast is lowered, use the accumulator 20 to recover and store the pressure energy of the high-pressure oil in the first single-acting hydraulic cylinder 8 and the second single-acting hydraulic cylinder 10; the power supply stops supplying power to the permanent magnet synchronous motor 4 , the permanent magnet synchronous motor rotor in the braking state is rotating due to inertia, but at this time electric energy will be generated, part of the high-pressure oil will flow back to the oil tank through the pressure reducing valve 11, and the other part will drive the hydraulic pump 5 as a motor to reverse, driving the permanent The magnetic synchronous motor 4 rotates. At this time, the permanent magnet synchronous motor 4 is equivalent to a generator. The permanent magnet synchronous motor 4 generates power to generate regenerative electric energy. The dynamic frequency converter adopts energy-consuming braking, and the regenerative electric energy generated by the permanent magnet synchronous motor 4 is converted into the heat of the braking resistor R brake . The generated regenerative electric energy keeps the DC voltage U DC 17 in a normal state and protects the regenerative braking inverter 3; if the stability of the power supply is good, when the mast is lowered, the control switch of the braking resistor can be disconnected, and the permanent magnet synchronous motor The alternating current AC generated by the rotation is converted into direct current DC, and the regenerative electric energy generated by the permanent magnet synchronous motor is stored by using the energy storage capacitor. The magnetic synchronous motor is used for power supply, which is conducive to the recovery and utilization of energy.
3、在双门架下降时，蓄能器20回收存储第一单作用缸8和第二单作用缸10的高压油液的压力能，当门架再次上升时，蓄能器20作辅助驱动，向第一单作用缸8和第二单作用缸10的高压油液提供压力油，实现能量的回收利用，利用再生制动变频器的调速和减压阀的降压作用，高压油液返回油箱，避免了传统的节流调速产生的热量，而带来油液温度的升高和对液压元件的损害。3. When the double mast is lowered, the accumulator 20 recovers and stores the pressure energy of the high-pressure oil in the first single-acting cylinder 8 and the second single-acting cylinder 10. When the mast rises again, the accumulator 20 serves as an auxiliary drive , to provide pressure oil to the high-pressure oil in the first single-acting cylinder 8 and the second single-acting cylinder 10 to realize energy recovery and utilization, and use the speed regulation of the regenerative braking frequency converter and the pressure-reducing effect of the pressure-reducing valve to reduce the pressure of the high-pressure oil Returning to the oil tank avoids the heat generated by the traditional throttling and speed regulation, which brings about the increase of the oil temperature and the damage to the hydraulic components.
4、在门架上升下降的过程中，第一压力传感器13、第二压力传感器14分别向连接面板2传递采集到的压力信号，SGW/SGI位移编码器15、21分别向连接面板2传递采集到的内门架、外门架在第一、第二提升区域的位移信号，上位机采集这些信号，经过处理向再生制动变频器3发出准确的控制指令。4. During the rising and falling process of the gantry, the first pressure sensor 13 and the second pressure sensor 14 transmit the collected pressure signals to the connection panel 2 respectively, and the SGW/SGI displacement encoders 15 and 21 transmit the collected pressure signals to the connection panel 2 respectively. The upper computer collects the displacement signals of the inner and outer masts in the first and second lifting areas, and sends accurate control instructions to the regenerative braking inverter 3 after processing.
图中12是液压油箱。12 among the figure is hydraulic oil tank.
以上实施例仅用以说明本发明的技术方案而非对其限制；尽管参照较佳实施例对本发明进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本发明的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本发明技术方案的精神，其均应涵盖在本发明请求保护的技术方案范围当中。The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the specific implementation of the present invention can still be carried out Modification or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, all of them shall be included in the scope of the technical solution claimed in the present invention.
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