CN104358285A - Energy-saving rotary table driving system of excavator based on dual motors and hydraulic energy accumulator - Google Patents
Energy-saving rotary table driving system of excavator based on dual motors and hydraulic energy accumulator Download PDFInfo
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Abstract
本发明公开了一种基于双马达和液压蓄能器的挖掘机的节能型转台驱动系统，当转台减速制动时，辅助液压泵/马达工作在泵模式，对液压蓄能器进行充油，回转制动动能转换成液压能储存在液压蓄能器中，避免了转台制动过程中的溢流损失；此外，在由于液压蓄能器的压力不可突变，减小了转台制动过程中的冲击。在液压挖掘机转台加速旋转时，辅助液压泵/马达工作在马达模式，液压蓄能器释放液压油，驱动辅助液压泵/马达辅助液压马达驱动转台加速，降低了发动机的能量损耗；辅助液压泵/马达将液压蓄能器的压力变化转换成扭矩变化再和液压马达通过扭矩耦合，解决了单个液压马达驱动转台时，在当转台减速制动时的液压蓄能器压力变化对转台操作性能的影响。
The invention discloses an energy-saving turntable drive system of an excavator based on dual motors and hydraulic accumulators. When the turntable decelerates and brakes, the auxiliary hydraulic pump/motor works in pump mode to charge the hydraulic accumulator with oil. The kinetic energy of slewing braking is converted into hydraulic energy and stored in the hydraulic accumulator, which avoids the overflow loss during the braking process of the turntable; shock. When the hydraulic excavator turntable accelerates, the auxiliary hydraulic pump/motor works in motor mode, the hydraulic accumulator releases hydraulic oil, drives the auxiliary hydraulic pump/motor, and the auxiliary hydraulic motor drives the turntable to accelerate, reducing the energy loss of the engine; the auxiliary hydraulic pump The /motor converts the pressure change of the hydraulic accumulator into a torque change and then couples with the hydraulic motor through torque, which solves the problem of the pressure change of the hydraulic accumulator when the turntable decelerates and brakes the turntable's operability when a single hydraulic motor drives the turntable. Influence.
Description
技术领域technical field
本发明涉及一种基于双马达和液压蓄能器的挖掘机的节能型转台驱动系统。The invention relates to an energy-saving turntable driving system of an excavator based on dual motors and hydraulic accumulators.
背景技术Background technique
液压挖掘机是一种功率比较大的工程机械，但是其能量的总利用率较低。液压挖掘机实现节能减排一直是业界努力追求的目标。Hydraulic excavator is a kind of construction machinery with relatively high power, but its total utilization rate of energy is low. Energy saving and emission reduction for hydraulic excavators has always been the goal pursued by the industry.
液压挖掘机转台的惯性较大，摆动比较频繁，在转台制动时，液压马达制动时，供油和回油油路均被切断，回油管路压力因马达惯性而升高，回转机构制动时主要通过溢流阀建立制动转矩使回转系统逐渐减速，由于挖掘机回转机构惯性较大、回转运动频繁，导致大量的制动能量转化成溢流损失。The rotary table of the hydraulic excavator has a large inertia and swings frequently. When the rotary table brakes or the hydraulic motor brakes, the oil supply and oil return circuits are cut off, and the pressure of the oil return pipeline increases due to the inertia of the motor. When moving, the braking torque is mainly established through the overflow valve to gradually decelerate the slewing system. Due to the large inertia of the slewing mechanism of the excavator and frequent slewing movements, a large amount of braking energy is converted into overflow loss.
当回转先导操作手柄从转台回转回到中位时，由于上部转台的惯性力作用，会产生很大的惯性冲击。目前，液压挖掘机虽然采用具有两级压力阶跃的溢流阀控制油压上升速度，使油压实现两级压力控制，降低了压力冲击。但仍然存在较大的压力冲击。When the rotary pilot operating handle is rotated from the turntable back to the neutral position, due to the inertial force of the upper turntable, a large inertial impact will be generated. At present, although the hydraulic excavator adopts a relief valve with two-stage pressure steps to control the rising speed of the oil pressure, the oil pressure can be controlled in two stages and the pressure shock is reduced. But there is still a large pressure shock.
发明内容Contents of the invention
本发明提供了一种基于双马达和液压蓄能器的挖掘机的节能型转台驱动系统，其克服了背景技术中转台制动过程中溢流损失、转台回到中位时惯性冲击大的缺点，同时，还具有使转台在加速过程中减少发动机能量损耗的优点。The present invention provides an energy-saving turntable drive system for an excavator based on dual motors and hydraulic accumulators, which overcomes the shortcomings of overflow loss during the braking process of the turntable in the background technology and large inertial impact when the turntable returns to the neutral position , At the same time, it also has the advantage of reducing the energy loss of the engine during the acceleration of the turntable.
本发明解决其技术问题的所采用的技术方案是：The adopted technical scheme that the present invention solves its technical problem is:
基于双马达和液压蓄能器的挖掘机的节能型转台驱动系统，包括先导操作手柄、先导泵、变量泵、发动机、多路阀、Y型三维四通液控换向阀、第一阻尼孔、第二阻尼孔、第一两位两通液控换向阀、第二两位两通液控换向阀，第一液控单向阀、第二液控单向阀、第三两位三通液控换向阀、第四两位三通液控换向阀、第一梭阀、第二梭阀、液压马达、辅助液压泵/马达、减速器、转台、M型三位四通液控换向阀、液压蓄能器、负流量控制压力检测单元、第五两位三通液控换向阀和第六两位三通液控换向阀；An energy-saving turntable drive system for excavators based on dual motors and hydraulic accumulators, including pilot operating handles, pilot pumps, variable pumps, engines, multi-way valves, Y-shaped three-dimensional four-way hydraulic control reversing valves, and the first damping hole , the second damping hole, the first two-position two-way hydraulic control reversing valve, the second two-position two-way hydraulic control reversing valve, the first hydraulic control one-way valve, the second hydraulic control one-way valve, the third two-position Three-way hydraulic control directional valve, fourth two-position three-way hydraulic control directional valve, first shuttle valve, second shuttle valve, hydraulic motor, auxiliary hydraulic pump/motor, reducer, turntable, M type three-position four-way Hydraulic control directional valve, hydraulic accumulator, negative flow control pressure detection unit, fifth two-position three-way hydraulic control directional valve and sixth two-position three-way hydraulic control directional valve;
其中：in:
发动机、先导泵和变量泵同轴机械相连，变量泵的进油口接油箱；多路阀的P口和P1口均连接变量泵的出油口，多路阀的T口接油箱；多路阀的D口和负流量控制压力检测单元相连；多路阀的A口至少分四路：第一路和液压马达的A腔相连，第二路和第一梭阀的进油口A2相连，第三路和第五两位三通液控换向阀的控制油口相连，第四路通过第一两位两通液控换向阀接油箱；多路阀的B口至少分四路：第一路和液压马达的B腔相连，第二路和第二梭阀的进油口A2相连，第三路和第六两位三通液控换向阀的控制油口相连，第四路通过第二两位两通液控换向阀接油箱；The engine, the pilot pump and the variable pump are mechanically connected with the same shaft, and the oil inlet of the variable pump is connected to the fuel tank; the P port and P1 port of the multi-way valve are connected to the oil outlet of the variable pump, and the T port of the multi-way valve is connected to the fuel tank; The D port of the valve is connected to the negative flow control pressure detection unit; the A port of the multi-way valve is divided into at least four routes: the first route is connected to the A chamber of the hydraulic motor, the second route is connected to the oil inlet A2 of the first shuttle valve, The third line is connected to the control oil port of the fifth two-position three-way hydraulic control directional valve, and the fourth line is connected to the oil tank through the first two-position two-way hydraulic control directional valve; the B port of the multi-way valve is divided into at least four lines: The first line is connected to the chamber B of the hydraulic motor, the second line is connected to the oil inlet A2 of the second shuttle valve, the third line is connected to the control oil port of the sixth two-position three-way hydraulic control reversing valve, and the fourth line Connect to the oil tank through the second two-position two-way hydraulic control reversing valve;
液压马达、辅助液压泵/马达、减速器和转台机械相连；辅助液压泵/马达的A腔和M型三维四通液控换向阀的P口、第一梭阀的进油口A1相连；辅助液压泵/马达的B腔和M型三位四通液控换向阀的T口、第二梭阀的进油口A1相连；M型三位四通液控换向阀的B口接油箱，M型三位四通液控换向阀的A口和液压蓄能器相连；The hydraulic motor, auxiliary hydraulic pump/motor, reducer are mechanically connected to the turntable; the chamber A of the auxiliary hydraulic pump/motor is connected to the P port of the M-type three-dimensional four-way hydraulic control reversing valve, and the oil inlet A1 of the first shuttle valve; The B chamber of the auxiliary hydraulic pump/motor is connected to the T port of the M-type three-position four-way hydraulic control directional valve and the oil inlet A1 of the second shuttle valve; the B port of the M-type three-position four-way hydraulic control directional valve is connected to The oil tank, the A port of the M-type three-position four-way hydraulic control reversing valve is connected with the hydraulic accumulator;
先导泵的进油口和油箱相连，先导泵的出油口至少分四路：第一路接先导操作手柄的油口P；第二路接第一液控单向阀的B口，第一液控单向阀的A口接第五两位三通液控换向阀的P口，第五两位三通液控换向阀的T口接油箱，第五两位三通液控换向阀的控制油口接液压马达的A腔，第五两位三通液控换向阀的A口和第三两位三通液控换向阀的P口相连，第三两位三通液控换向阀的T口和第二两位三通液控换向阀的A口相连、第二阻尼孔的一个油口相连，第二阻尼孔的另一个油口与第二两位两通液控换向阀的控制油口相连，第三两位三通液控换向阀的A口与M型三位四通液控换向阀的控制油口K1相连；第三路接Y型三位四通液控换向阀的P口，Y型三位四通液控换向阀的T口接油箱，Y型三位四通液控换向阀的A口和第一两位三通液控换向阀的P口相连，第一两位三通液控换向阀的T口接油箱，Y型三位四通液控换向阀的B口和第二两位三通液控换向阀的P口相连，第二两位三通液控换向阀的T口接油箱，Y型三维四通液控换向阀的两个控制油口K1和K2分别和第一梭阀、第二梭阀的出油口相连；第四路接第二液控单向阀的B口，第二液控单向阀的A口接第六两位三通液控换向阀的P口，第六两位三通液控换向阀的T口接油箱，第六两位三通液控换向阀的控制油口接液压马达的B腔，第六两位三通液控换向阀的A口和第四两位三通液控换向阀的T口相连，第四两位三通液控换向阀的P口和第一两位三通液控换向阀的A口、第一阻尼孔的一个油口相连，第一阻尼孔的另一个油口与第一两位两通液控换向阀的控制油口相连，第四两位三通液控换向阀的A口与M型三位四通液控换向阀的控制油口K2相连；The oil inlet of the pilot pump is connected to the oil tank, and the oil outlet of the pilot pump is divided into four lines at least: the first line is connected to the oil port P of the pilot operating handle; the second line is connected to the B port of the first hydraulic control check valve; The A port of the hydraulic control check valve is connected to the P port of the fifth two-position three-way hydraulic control reversing valve, the T port of the fifth two-position three-way hydraulic control reversing valve is connected to the oil tank, and the fifth two-position three-way hydraulic control reversing valve is connected to the oil tank. The control oil port of the directional valve is connected to the A cavity of the hydraulic motor, the A port of the fifth two-position three-way hydraulic control directional valve is connected with the P port of the third two-position three-way hydraulic control directional valve, and the third two-position three-way The T port of the hydraulic control reversing valve is connected with the A port of the second two-position three-way hydraulic control reversing valve, one oil port of the second damping hole is connected, and the other oil port of the second damping hole is connected with the second two-position two-way The port A of the third two-position three-way hydraulic control valve is connected to the control oil port K1 of the M-type three-position four-way hydraulic control valve; the third line is connected to Y The P port of the type three-position four-way hydraulic control reversing valve, the T port of the Y-type three-position four-way hydraulic control reversing valve is connected to the oil tank, the A port and the first two positions of the Y-type three-position four-way hydraulic control reversing valve The P port of the three-way hydraulic control reversing valve is connected, the T port of the first two-position three-way hydraulic control reversing valve is connected to the oil tank, the B port of the Y-type three-position four-way hydraulic control reversing valve and the second two-position three-way The P port of the hydraulic control directional valve is connected, the T port of the second two-position three-way hydraulic control directional valve is connected to the oil tank, and the two control oil ports K1 and K2 of the Y-type three-dimensional four-way hydraulic control directional valve are respectively connected to the first The shuttle valve and the oil outlet of the second shuttle valve are connected; the fourth road is connected to the B port of the second hydraulic control check valve, and the A port of the second hydraulic control check valve is connected to the sixth two-position three-way hydraulic control reversing valve The P port of the sixth two-position three-way hydraulic control valve is connected to the oil tank, the control oil port of the sixth two-position three-way hydraulic control valve is connected to the B cavity of the hydraulic motor, and the sixth two-position three-way hydraulic control valve is connected to the oil tank. The A port of the control reversing valve is connected with the T port of the fourth two two three way hydraulic control reversing valve, the P port of the fourth two two three way hydraulic control reversing valve is connected with the first two two three way hydraulic control reversing valve The A port of the first damping hole is connected to one oil port of the first damping hole, the other oil port of the first damping hole is connected to the control oil port of the first two-two two-way hydraulic control directional control valve, and the fourth two-two three-way hydraulic control changeover valve The A port of the directional valve is connected with the control oil port K2 of the M-type three-position four-way hydraulic control directional valve;
先导操作手柄的输出先导压力信号b1分四路控制：第一路接多路阀的控制油口K2，第二路接第一两位三通液控换向阀的控制油口，第三路接第一液控单向阀的控制油口，第四路接第三两位三通液控换向阀的控制油口；先导操作手柄的输出先导压力信号b2分四路控制：第一路接多路阀的控制油口K1，第二路接第二两位三通液控换向阀的控制油口，第三路接第二液控单向阀的控制油口，第四路接第四两位三通液控换向阀的控制油口。The output pilot pressure signal b1 of the pilot operating handle is controlled in four ways: the first way is connected to the control oil port K2 of the multi-way valve, the second way is connected to the control oil port of the first two-position three-way hydraulic control reversing valve, and the third way Connect to the control oil port of the first hydraulic control check valve, and the fourth road to connect to the control oil port of the third two-position three-way hydraulic control reversing valve; the output pilot pressure signal b2 of the pilot operating handle is divided into four roads for control: the first road Connect to the control oil port K1 of the multi-way valve, the second line to the control oil port of the second two-position three-way hydraulic control reversing valve, the third line to the control oil port of the second hydraulic control check valve, and the fourth line to The control oil port of the fourth two-position three-way hydraulic control directional valve.
一实施例之中：还包括其他执行器驱动系统，其进油口与变量泵的出油口相连。In one embodiment: it also includes other actuator driving systems, the oil inlet of which is connected with the oil outlet of the variable displacement pump.
一实施例之中：还包括传统转台液压马达驱动附属单元，多路阀A口的第五路接传统转台液压马达驱动附属单元，多路阀B口的第五路接传统转台液压马达驱动附属单元。In one embodiment: it also includes a traditional rotary table hydraulic motor drive accessory unit, the fifth channel of the multi-way valve A port is connected to the traditional rotary table hydraulic motor drive accessory unit, and the fifth channel of the multi-way valve B port is connected to the traditional rotary table hydraulic motor drive accessory unit unit.
一实施例之中：还包括第一溢流阀，所述先导泵的出油口的第五路接第一溢流阀的进油口，第一溢流阀的出油口接油箱。In one embodiment: a first overflow valve is also included, the fifth channel of the oil outlet of the pilot pump is connected to the oil inlet of the first overflow valve, and the oil outlet of the first overflow valve is connected to the oil tank.
一实施例之中：还包括第二溢流阀，其进油口连接变量泵4的出油口，其出油口接油箱。In one embodiment: it also includes a second relief valve, the oil inlet of which is connected to the oil outlet of the variable displacement pump 4, and the oil outlet of which is connected to the oil tank.
一实施例之中：还包括第三溢流阀，其进油口连接M型三位四通液控换向阀的A口，其出油口接油箱。In one embodiment: it also includes a third relief valve, the oil inlet of which is connected to port A of the M-type three-position four-way hydraulically controlled reversing valve, and the oil outlet of which is connected to the oil tank.
一实施例之中：所述负流量控制压力检测单元包括第三阻尼孔和第四溢流阀，第三阻尼孔的一个油口与多路阀的D口相连，另一个油口接油箱，第四溢流阀的进油口与多路阀的D口相连，出油口接油箱。In an embodiment: the negative flow control pressure detection unit includes a third damping hole and a fourth overflow valve, one oil port of the third damping hole is connected to the D port of the multi-way valve, and the other oil port is connected to the oil tank, The oil inlet of the fourth overflow valve is connected with the D port of the multi-way valve, and the oil outlet is connected with the oil tank.
一实施例之中：所述其他执行器驱动系统为动臂驱动系统或斗杆驱动系统或行走驱动系统。In an embodiment: said other actuator driving system is a boom driving system or a stick driving system or a traveling driving system.
本技术方案与背景技术相比，它具有如下优点：Compared with the background technology, this technical solution has the following advantages:
1、当转台减速制动时，辅助液压泵/马达工作在泵模式，对液压蓄能器进行充油，回转制动动能转换成液压能储存在液压蓄能器中，充分利用了液压蓄能器的可快速储存能量的优点，避免了转台制动过程中的溢流损失。同时通过液压马达制动腔的压力卸荷实现了转台制动动能尽可能分配给辅助液压泵/马达的制动腔，保证了能量回收效率。此外，在由于液压蓄能器的压力不可突变，减小了转台制动过程中的冲击。1. When the turntable decelerates and brakes, the auxiliary hydraulic pump/motor works in the pump mode to charge the hydraulic accumulator, and the kinetic energy of the rotary braking is converted into hydraulic energy and stored in the hydraulic accumulator, making full use of the hydraulic energy storage The advantage of fast energy storage of the converter avoids the overflow loss during the braking process of the turntable. At the same time, through the pressure unloading of the brake chamber of the hydraulic motor, the braking kinetic energy of the turntable is distributed to the brake chamber of the auxiliary hydraulic pump/motor as much as possible, ensuring the energy recovery efficiency. In addition, since the pressure of the hydraulic accumulator cannot change abruptly, the impact during the braking process of the turntable is reduced.
2、在液压挖掘机转台加速旋转时，辅助液压泵/马达工作在马达模式，液压蓄能器释放液压油，驱动辅助液压泵/马达辅助液压马达驱动转台加速，降低了发动机的能量损耗；2. When the hydraulic excavator turntable accelerates, the auxiliary hydraulic pump/motor works in motor mode, and the hydraulic accumulator releases hydraulic oil to drive the auxiliary hydraulic pump/motor to drive the turntable to accelerate, reducing the energy loss of the engine;
3、该整个转台驱动系统通过检测先导操作手柄输出的压力信号及各液压阀之间形成的油路逻辑关系能将转台静止、左旋转，左旋转能量回收制动，左旋转节流制动、右旋转，右旋转能量回收制动，右旋转节流制动等多种工作模式自动识别；3. The entire turntable drive system can make the turntable stand still, rotate left, brake with energy recovery for left rotation, throttling brake for left rotation, and Automatic recognition of various working modes such as right rotation, right rotation energy recovery braking, right rotation throttling braking, etc.;
4、辅助液压泵/马达将液压蓄能器的压力变化转换成扭矩变化再和液压马达通过扭矩耦合，解决了单个液压马达驱动转台时，在当转台减速制动时的液压蓄能器压力变化对转台操作性能的影响。4. The auxiliary hydraulic pump/motor converts the pressure change of the hydraulic accumulator into a torque change and then couples with the hydraulic motor through torque, which solves the pressure change of the hydraulic accumulator when the turntable decelerates and brakes when a single hydraulic motor drives the turntable Influence on the operating performance of the turntable.
附图说明Description of drawings
下面结合附图和实施例对本发明作进一步说明。The present invention will be further described below in conjunction with drawings and embodiments.
图1绘示了本发明之较佳实施例的具体系统结构图。FIG. 1 shows a specific system structure diagram of a preferred embodiment of the present invention.
具体实施方式Detailed ways
请查阅图1，其示出了本发明之较佳实施例的具体体统结构图，基于双马达和液压蓄能器的挖掘机的节能型转台驱动系统，包括先导操作手柄1、第一溢流阀2、先导泵3、变量泵4、发动机5、第二溢流阀6、其他执行器驱动系统7、多路阀8、传统转台液压马达驱动附属单元9、Y型三位四通液控换向阀10、第一两位三通液控换向阀11、第二两位三通液控换向阀12、第一阻尼孔13、第二阻尼孔14、第一两位两通液控换向阀15、第二两位两通液控换向阀16、第一液控单向阀17、第二液控单向阀18、第三两位三通液控换向阀19、第四两位三通液控换向阀20、第一梭阀21、第二梭阀22、液压马达23、辅助液压泵/马达24、减速器25、转台26、M型三位四通液控换向阀27、第三溢流阀28、液压蓄能器29、第三阻尼孔30、第四溢流阀31、第五两位三通液控换向阀32、第六两位三通液控换向阀33；Please refer to Fig. 1, which shows a specific system structure diagram of a preferred embodiment of the present invention, an energy-saving turntable drive system of an excavator based on dual motors and hydraulic accumulators, including a pilot operating handle 1, a first overflow Valve 2, pilot pump 3, variable pump 4, engine 5, second relief valve 6, other actuator drive system 7, multi-way valve 8, traditional turntable hydraulic motor drive auxiliary unit 9, Y-type three-position four-way hydraulic control Reversing valve 10, the first two-position three-way hydraulic control selector valve 11, the second two-position three-way hydraulic control selector valve 12, the first damping hole 13, the second damping hole 14, the first two-position two-way liquid control reversing valve 15, the second two-position two-way hydraulic control reversing valve 16, the first hydraulic control check valve 17, the second hydraulic control check valve 18, the third two-position three-way hydraulic control reversing valve 19, The fourth two-position three-way hydraulic control reversing valve 20, the first shuttle valve 21, the second shuttle valve 22, the hydraulic motor 23, the auxiliary hydraulic pump/motor 24, the reducer 25, the turntable 26, the M-type three-position four-way fluid control reversing valve 27, third overflow valve 28, hydraulic accumulator 29, third damping hole 30, fourth overflow valve 31, fifth two-position three-way hydraulic control reversing valve 32, sixth two-position three-way Through the hydraulic control reversing valve 33;
其中：in:
发动机5、先导泵3和变量泵4同轴机械相连；变量泵4的进油口和油箱相连；第二溢流阀6的进油口、其他执行器驱动系统7的进油口以及多路阀8的P口和P1口均连接变量泵4的出油口，第二溢流阀6的出油口接油箱，多路阀8的T口连接油箱，多路阀8的D口和第四溢流阀31的进油口以及第三节流口30的进油口相连，第三节流口30的出油口和第四溢流阀31的出油口均连接油箱；多路阀8的A口分为五路：第一路和液压马达23的A腔相连，第二路和第一梭阀21的进油口A2相连，第三路和第五两位三通液控换向阀32的控制油口相连，第四路通过第一两位两通液控换向阀15接油箱，第五路接传统转台液压马达驱动附属单元9；多路阀8的B口分为五路：第一路和液压马达23的B腔相连，第二路和第二梭阀22的进油口A2相连，第三路和第六两位三通液控换向阀33的控制油口相连，第四路通过第二两位两通液控换向阀16连接油箱，第五路接传统转台液压马达驱动附属单元9；The engine 5, the pilot pump 3 and the variable pump 4 are coaxially connected mechanically; the oil inlet of the variable pump 4 is connected with the oil tank; the oil inlet of the second overflow valve 6, the oil inlet of other actuator drive systems 7 and the Port P and P1 of valve 8 are connected to the oil outlet of variable pump 4, the oil outlet of second relief valve 6 is connected to the oil tank, the T port of multi-way valve 8 is connected to the oil tank, and the D port of multi-way valve 8 is connected to the first oil tank. The oil inlet of the four overflow valve 31 is connected to the oil inlet of the third throttle port 30, and the oil outlet of the third throttle port 30 and the oil outlet of the fourth overflow valve 31 are all connected to the fuel tank; the multi-way valve The port A of 8 is divided into five routes: the first route is connected with the chamber A of the hydraulic motor 23, the second route is connected with the oil inlet A2 of the first shuttle valve 21, and the third route is connected with the fifth two-position three-way hydraulic control switch. The control oil port of the directional valve 32 is connected, the fourth line is connected to the oil tank through the first two-position two-way hydraulic control reversing valve 15, and the fifth line is connected to the traditional turntable hydraulic motor drive auxiliary unit 9; the B port of the multi-way valve 8 is divided into Five routes: the first route is connected to chamber B of the hydraulic motor 23, the second route is connected to the oil inlet A2 of the second shuttle valve 22, and the third route is connected to the control oil of the sixth two-position three-way hydraulic control reversing valve 33. The fourth road is connected to the fuel tank through the second two-position two-way hydraulic control reversing valve 16, and the fifth road is connected to the traditional turntable hydraulic motor to drive the auxiliary unit 9;
液压马达23、辅助液压泵/马达24、减速器25和转台26机械相连；辅助液压泵/马达24的A腔和M型三位四通液控换向阀27的P口、第一梭阀21的进油口A1相连；辅助液压泵/马达24的B腔和M型三位四通液控换向阀27的T口、第二梭阀22的进油口A1相连；M型三位四通液控换向阀27的B口接油箱，M型三位四通液控换向阀27的A口和液压蓄能器29、第三溢流阀28的进油口相连，第三溢流阀28的出油口接油箱。The hydraulic motor 23, the auxiliary hydraulic pump/motor 24, the reducer 25 and the turntable 26 are mechanically connected; the chamber A of the auxiliary hydraulic pump/motor 24, the P port of the M-type three-position four-way hydraulic control reversing valve 27, and the first shuttle valve The oil inlet A1 of 21 is connected; the B chamber of the auxiliary hydraulic pump/motor 24 is connected with the T port of the M-type three-position four-way hydraulic control reversing valve 27 and the oil inlet A1 of the second shuttle valve 22; the M-type three-position The B port of the four-way hydraulic control reversing valve 27 is connected to the oil tank, the A port of the M-type three-position four-way hydraulic control reversing valve 27 is connected with the oil inlet of the hydraulic accumulator 29 and the third overflow valve 28, and the third The oil outlet of the relief valve 28 is connected to the oil tank.
先导泵3的进油口和油箱相连，先导泵3的出油口分五路：第一路接先导操作手柄1的油口P；第二路接第一液控单向阀17的B口，第一液控单向阀17的A口接第五两位三通液控换向阀32的P口，第五两位三通液控换向阀32的T口接油箱，第五两位三通液控换向阀32的控制油口接液压马达23的A腔，第五两位三通液控换向阀32的A口和第三两位三通液控换向阀19的P口相连，第三两位三通液控换向阀19的T口和第二两位三通液控换向阀12的A口、第二阻尼孔14的一个油口相连，第二阻尼孔14的另一个油口与第二两位两通液控换向阀16的控制油口相连,第三两位三通液控换向阀19的A口与M型三位四通液控换向阀27的控制油口K1相连；第三路接Y型三位四通液控换向阀10的P口，Y型三位四通液控换向阀10的T口接油箱，Y型三位四通液控换向阀10的A口和第一两位三通液控换向阀11的P口相连，第一两位三通液控换向阀11的T口接油箱，Y型三位四通液控换向阀10的B口和第二两位三通液控换向阀12的P口相连，第二两位三通液控换向阀12的T口接油箱，Y型三位四通液控换向阀10的两个控制油口K1和K2分别和第一梭阀21、第二梭阀22的出油口相连；第四路接第二液控单向阀18的B口，第二液控单向阀18的A口接第六两位三通液控换向阀33的P口，第六两位三通液控换向阀33的T口接油箱，第六两位三通液控换向阀33的控制油口接液压马达23的B腔，第六两位三通液控换向阀33的A口和第四两位三通液控换向阀20的T口相连，第四两位三通液控换向阀20的P口和第一两位三通液控换向阀11的A口、第一阻尼孔13的一个油口相连，第一阻尼孔13的另一个油口与第一两位两通液控换向阀15的控制油口相连,第四两位三通液控换向阀20的A口与M型三位四通液控换向阀27的控制油口K2相连；第五路接第一溢流阀2的进油口，第一溢流阀2的出油口接油箱；；The oil inlet of the pilot pump 3 is connected to the oil tank, and the oil outlet of the pilot pump 3 is divided into five routes: the first route is connected to the oil port P of the pilot operating handle 1; the second route is connected to the B port of the first hydraulic control check valve 17 , the A port of the first hydraulic control check valve 17 is connected to the P port of the fifth two-position three-way hydraulic control reversing valve 32, the T port of the fifth two-position three-way hydraulic control reversing valve 32 is connected to the fuel tank, and the fifth two The control oil port of the three-position three-way hydraulic control reversing valve 32 is connected to the A chamber of the hydraulic motor 23, the A port of the fifth two-two three-way hydraulic control reversing valve 32 and the third two-two three-way hydraulic control reversing valve 19 The P port is connected, the T port of the third two-position three-way hydraulic control reversing valve 19 is connected with the A port of the second two-position three-way hydraulic control reversing valve 12, and an oil port of the second damping hole 14, and the second damping The other oil port of the hole 14 is connected to the control oil port of the second two-position two-way hydraulic control reversing valve 16, and the A port of the third two-two three-way hydraulic control reversing valve 19 is connected to the M-type three-position four-way hydraulic control valve. The control oil port K1 of the reversing valve 27 is connected; the third road is connected to the P port of the Y-type three-position four-way hydraulic control reversing valve 10, and the T port of the Y-type three-position four-way hydraulic control reversing valve 10 is connected to the oil tank. The A port of the three-position four-way hydraulic control directional valve 10 is connected to the P port of the first two-position three-way hydraulic control directional valve 11, and the T port of the first two-position three-way hydraulic control directional valve 11 is connected to the fuel tank. The B port of the Y-type three-position four-way hydraulic control reversing valve 10 is connected to the P port of the second two-position three-way hydraulic control reversing valve 12, and the T port of the second two-position three-way hydraulic control reversing valve 12 is connected to the fuel tank , the two control oil ports K1 and K2 of the Y-type three-position four-way hydraulic control reversing valve 10 are respectively connected to the oil outlets of the first shuttle valve 21 and the second shuttle valve 22; the fourth road is connected to the second hydraulic control unit The B port of the directional valve 18, the A port of the second hydraulic control check valve 18 is connected to the P port of the sixth two-position three-way hydraulic control reversing valve 33, and the T port of the sixth two-position three-way hydraulic control reversing valve 33 Connected to the oil tank, the control oil port of the sixth two-position three-way hydraulic control reversing valve 33 is connected to the B chamber of the hydraulic motor 23, the sixth two-position three-way hydraulic control reversing valve 33 A port and the fourth two two-three-way liquid The T port of the control reversing valve 20 is connected, the P port of the fourth two-position three-way hydraulic control reversing valve 20 is connected with the A port of the first two-two three-way hydraulic control reversing valve 11, and an oil connection of the first damping hole 13 The other oil port of the first damping hole 13 is connected with the control oil port of the first two-position two-way hydraulic control reversing valve 15, and the A port of the fourth two-position three-way hydraulic control reversing valve 20 is connected with the M-type The control oil port K2 of the three-position four-way hydraulic control reversing valve 27 is connected; the fifth road is connected to the oil inlet of the first relief valve 2, and the oil outlet of the first relief valve 2 is connected to the oil tank;
先导操作手柄1的输出先导压力信号b1分四路：第一路接多路阀8的控制油口K2，第二路接第一两位三通液控换向阀11的控制油口，第三路接第一液控单向阀17的控制油口，第四路接第三两位三通液控换向阀19的控制油口；先导操作手柄1的输出先导压力信号b2分四路：第一路接多路阀8的控制油口K1，第二路接第二两位三通液控换向阀12的控制油口，第三路接第二液控单向阀18的控制油口，第四路接第四两位三通液控换向阀20的控制油口；The output pilot pressure signal b1 of the pilot operating handle 1 is divided into four routes: the first route is connected to the control port K2 of the multi-way valve 8, the second route is connected to the control port of the first two-position three-way hydraulic control reversing valve 11, and the second route is connected to the control port of the first two-position three-way hydraulic control reversing valve 11. Three lines are connected to the control oil port of the first hydraulic control check valve 17, and the fourth line is connected to the control oil port of the third two-position three-way hydraulic control reversing valve 19; the output pilot pressure signal b2 of the pilot operating handle 1 is divided into four lines : The first road is connected to the control oil port K1 of the multi-way valve 8, the second road is connected to the control oil port of the second two-position three-way hydraulic control reversing valve 12, and the third road is connected to the control of the second hydraulic control check valve 18 Oil port, the fourth road is connected to the control oil port of the fourth two-position three-way hydraulic control reversing valve 20;
本实施例中，该其他执行器驱动系统12为动臂驱动系统、斗杆驱动系统、行走驱动系统等；多路阀8还包括用于控制其他执行器驱动系统的控制单元(图中未示出)；该先导操作手柄1还包括用于控制其他执行器驱动系统的控制单元(图中未示出)；In this embodiment, the other actuator drive systems 12 are boom drive systems, arm drive systems, travel drive systems, etc.; the multi-way valve 8 also includes a control unit (not shown in the figure) for controlling other actuator drive systems. out); the pilot operating handle 1 also includes a control unit (not shown in the figure) for controlling other actuator drive systems;
下面详述本实施例的工作原理：The working principle of this embodiment is described in detail below:
在液压系统中的多路阀8的中位回油通道上设置了一个第四溢流阀31和第三节流口30而组成负流量控制压力检测单元，油液通过第三节流口30产生压差，进而控制变量泵4的排量。由于先导操作手柄1的结构原因，任何时刻，其先导输出压力b1，b2不可能两个同时都大于零。A fourth relief valve 31 and a third throttle port 30 are set on the middle oil return channel of the multi-way valve 8 in the hydraulic system to form a negative flow control pressure detection unit, and the oil passes through the third throttle port 30 A pressure difference is generated to control the displacement of the variable displacement pump 4 . Due to the structure of the pilot operating handle 1, at any moment, the pilot output pressures b 1 and b 2 cannot both be greater than zero at the same time.
(1)停止模式(1) Stop mode
当先导操作手柄1的输出压力信号b1和b2均小于某个先导压力阈值pi(pi为一个大于零较小正值，为了避免受到手柄处于中位时的噪声干扰)转台26静止时，液压马达23的两腔压力较小，所有的两位三通液控换向阀11、12、19、20、32和33、均工作在初始工位，M型三位四通液控换向阀27工作在中位，Y型三位四通液控换向阀10工作在中位，第一两位两通液控换向阀15和第二两位两通液控换向阀16工作在初始工位，第一液控单向阀17和第二液控单向阀18反向截止；机械制动(图中未示出1)工作，多路阀8处于中位，变量泵4的全部液压油通过多路阀8的油路P1-D和第三节流口30回油箱。When the output pressure signals b 1 and b 2 of the pilot operating handle 1 are both less than a certain pilot pressure threshold p i (p i is a small positive value greater than zero, in order to avoid noise interference when the handle is in the neutral position) the turntable 26 is stationary , the two-chamber pressure of the hydraulic motor 23 is relatively small, and all the two-position three-way hydraulically controlled reversing valves 11, 12, 19, 20, 32 and 33 are working at the initial positions, and the M-type three-position four-way hydraulically controlled The reversing valve 27 works in the neutral position, the Y-type three-position four-way hydraulic control reversing valve 10 works in the neutral position, the first two-position two-way hydraulic control reversing valve 15 and the second two-position two-way hydraulic control reversing valve 16 works at the initial position, the first hydraulically controlled check valve 17 and the second hydraulically controlled check valve 18 reverse cut-off; the mechanical brake (1 not shown in the figure) works, the multi-way valve 8 is in the neutral position, and the variable All the hydraulic oil of the pump 4 returns to the oil tank through the oil passage P1-D of the multi-way valve 8 and the third throttle port 30 .
(2)转台旋转模式(2) Turntable rotation mode
当先导操作手柄1的其中一个输出压力信号b1和b2大于某个先导压力阈值pi时，转台处于左旋转模式或右旋转模式(这里以右旋转为例，左旋转工作原理参考右旋转模式)。When one of the output pressure signals b 1 and b 2 of the pilot operating handle 1 is greater than a certain pilot pressure threshold p i , the turntable is in the left rotation mode or the right rotation mode (here, right rotation is taken as an example, and the working principle of left rotation refers to right rotation model).
当先导操作手柄1的输出压力信号b2逐渐变大并大于某个先导压力阈值pi时，多路阀8的控制油口K1与b2相通，多路阀8工作在左工位，油口P-A和B-T相通，转台处于右旋转模式。When the output pressure signal b2 of the pilot operating handle 1 gradually increases and is greater than a certain pilot pressure threshold p i , the control oil port K1 of the multi-way valve 8 communicates with b2, the multi-way valve 8 works in the left position, and the oil port PA and BT are connected, and the turntable is in the right rotation mode.
第二两位三通液控换向阀12和第四两位三通液控换向阀20的控制油口、第二液控单向阀18的控制油口和先导压力信号b2相通，第一两位三通液控换向阀11和第三两位三通液控换向阀19的控制油口、第一液控单向阀17的控制油口和先导压力信号b1相通，此时由于先导操作手柄1的输出压力信号b1接近零值而b2大于先导压力阈值pi，第二两位三通液控换向阀12和第四两位三通液控换向阀20工作在右边位，第二液控单向阀18反向导通，第六两位三通液控换向阀33的控制油口和液压马达23的B腔相连，由于右旋转时，液压马达23的B腔的压力很小，第六两位三通液控换向阀33工作在右工位，因此先导泵3的出口先导控制压力油经第二液控单向阀18、第六两位三通液控换向阀33的油口P-A,第四两位三通液控换向阀20的油口T-A作用在M型三位四通液控换向阀27的控制油口K2，而M型三位四通液控换向阀27的控制油口K1经第三两位三通液控液控换向阀19的油口A-T，第二两位三通液控换向阀12的油口A-T接油箱，因此M型三位四通液控换向阀27工作在右工位，辅助液压泵/马达24的A腔通过M型三位四通液控换向阀27的油口P-A和液压蓄能器29相连，液压蓄能器29释放液压油，驱动辅助液压泵/马达24工作在马达模式辅助液压马达23驱动转台26,液压蓄能器29在辅助液压泵/马达24的两腔产生一个压差，对转台26产生一个驱动力矩，实现转台26的加速过程。由于辅助液压泵/马达24的对转台26的驱动力矩，降低了液压马达23的A腔压力，进而变量泵4的出口压力较小，降低了发动机5的能量损耗。The control oil port of the second two-position three-way hydraulic control reversing valve 12 and the fourth two-position three-way hydraulic control reversing valve 20, the control oil port of the second hydraulic control check valve 18 and the pilot pressure signal b2 are connected, The control oil port of the first two-position three-way hydraulic control reversing valve 11 and the third two-position three-way hydraulic control reversing valve 19, the control oil port of the first hydraulic control check valve 17 and the pilot pressure signal b1 are connected, At this time, because the output pressure signal b 1 of the pilot operating handle 1 is close to zero and b 2 is greater than the pilot pressure threshold p i , the second two-position three-way hydraulic control reversing valve 12 and the fourth two-position three-way hydraulic control reversing valve 20 works in the right position, the second hydraulic control check valve 18 conducts reversely, and the control oil port of the sixth two-position three-way hydraulic control reversing valve 33 is connected with the B chamber of the hydraulic motor 23. The pressure in chamber B of 23 is very small, and the sixth two-position three-way hydraulic control reversing valve 33 works in the right position, so the outlet pilot control pressure oil of the pilot pump 3 passes through the second hydraulic control check valve 18 and the sixth two-way valve. The oil port PA of the three-position three-way hydraulic control directional valve 33, the oil port TA of the fourth two-position three-way hydraulic control directional valve 20 acts on the control oil port K2 of the M-type three-position four-way hydraulic control directional valve 27, And the control oil port K1 of the M-type three-position four-way hydraulic control directional valve 27 passes through the oil port AT of the third two-position three-way hydraulic control hydraulic control directional valve 19, and the second two-position three-way hydraulic control directional valve 12 The oil port AT of the oil tank is connected to the oil tank, so the M-type three-position four-way hydraulic control reversing valve 27 works in the right position, and the A chamber of the auxiliary hydraulic pump/motor 24 passes through the oil of the M-type three-position four-way hydraulic control reversing valve 27. Port PA is connected to hydraulic accumulator 29, hydraulic accumulator 29 releases hydraulic oil, drives auxiliary hydraulic pump/motor 24 to work in motor mode, auxiliary hydraulic motor 23 drives turntable 26, and hydraulic accumulator 29 operates in auxiliary hydraulic pump/motor 24 A pressure difference is generated between the two cavities, and a driving torque is generated to the turntable 26 to realize the acceleration process of the turntable 26. Due to the driving torque of the auxiliary hydraulic pump/motor 24 against the turntable 26 , the pressure in chamber A of the hydraulic motor 23 is reduced, and the outlet pressure of the variable displacement pump 4 is smaller, which reduces the energy loss of the engine 5 .
(3)制动模式(3) Brake mode
以左旋转制动为例，右旋转制动参考左旋转制动；Take left rotation brake as an example, right rotation brake refers to left rotation brake;
1)能量回收制动模式1) Energy recovery braking mode
当先导操作手柄1松开回到中位时，其输出压力信号b1和b2均小于某个先导压力阈值pi时，多路阀8处于中位，多路阀8的油口A-T或者B-T完全堵死，转台处于能量回收制动模式。由于转台26的惯性，在液压马达23的A腔会在先导操作手柄1回中位的瞬间产生高压液压油，液压马达23的A腔的高压液压油通过第一梭阀21的油口A2和出油口，作用在Y型三位四通液控换向阀10的控制油口K1，Y型三位四通液控换向阀10的控制油口K2通过第二梭阀22和液压马达23的B腔或者辅助液压泵/马达24的B腔相连，由于液压马达的B腔和辅助液压泵/马达24的B腔的压力均较小，Y型三位四通液控换向阀10工作在左工位，先导操作手柄1的输出压力信号b1和b2均接近零值，第一两位三通液控换向阀11和第三两位三通液控换向阀19工作在右工位，第二两位三通液控换向阀12和第四两位三通液控换向阀20工作在左工位，第一液控单向阀17和第二液控单向阀18均反向截止，因此先导泵3的出口先导控制压力油经Y型三位四通液控换向阀10的油口P-A,第一两位三通液控换向阀11的油口P-A,第四两位三通液控换向阀20的油口P-A作用在M型三位四通液控换向阀27的控制油口K2，而M型三位四通液控换向阀27的控制油口K1经第三两位三通液控液控换向阀19的油口A-T，第二两位三通液控换向阀12的油口P-A,Y型三位四通液控换向阀10的油口B-T接油箱，因此M型三位四通液控换向阀27工作在右工位，辅助液压泵/马达24的A腔通过M型三位四通液控换向阀27的油口P-A和液压蓄能器29相连，转台26由于继续旋转带动辅助液压泵/马达24工作在泵模式，对液压蓄能器29进行充油，同时液压蓄能器29在辅助液压泵/马达24的两腔产生一个压差，对转台26产生一个反向制动力矩，实现转台26的制动过程。When the pilot operating handle 1 is released and returns to the neutral position, when its output pressure signals b 1 and b 2 are both lower than a certain pilot pressure threshold p i , the multi-way valve 8 is in the neutral position, and the oil port AT of the multi-way valve 8 or The BT is completely blocked and the turntable is in regenerative braking mode. Due to the inertia of the turntable 26, the chamber A of the hydraulic motor 23 will generate high-pressure hydraulic oil at the moment when the pilot operating handle 1 returns to the neutral position, and the high-pressure hydraulic oil in the chamber A of the hydraulic motor 23 passes through the oil ports A2 and The oil outlet acts on the control oil port K1 of the Y-type three-position four-way hydraulic control reversing valve 10, and the control oil port K2 of the Y-type three-position four-way hydraulic control reversing valve 10 passes through the second shuttle valve 22 and the hydraulic motor The chamber B of 23 or the chamber B of the auxiliary hydraulic pump/motor 24 are connected. Since the pressures in the chamber B of the hydraulic motor and the chamber B of the auxiliary hydraulic pump/motor 24 are relatively small, the Y-type three-position four-way hydraulic control reversing valve 10 Working in the left station, the output pressure signals b 1 and b 2 of the pilot operating handle 1 are close to zero, the first two-two three-way hydraulic control directional valve 11 and the third two-two three-way hydraulic control directional valve 19 work In the right station, the second two-position three-way hydraulically controlled reversing valve 12 and the fourth two-position three-way hydraulically controlled reversing valve 20 work in the left station, and the first hydraulically controlled one-way valve 17 and the second hydraulically controlled one-way valve Both direction valves 18 are reversely cut off, so the outlet pilot control pressure oil of the pilot pump 3 passes through the oil port PA of the Y-type three-position four-way hydraulic control selector valve 10, and the oil of the first two-position three-way hydraulic control selector valve 11 Port PA, the oil port PA of the fourth two-position three-way hydraulic control reversing valve 20 acts on the control oil port K2 of the M-type three-position four-way hydraulic control reversing valve 27, while the M-type three-position four-way hydraulic control reversing valve The control oil port K1 of the valve 27 passes through the oil port AT of the third two-position three-way hydraulic control valve 19, the oil port PA of the second two-position three-way hydraulic control valve 12, and the Y-type three-position four-way The oil port BT of the hydraulic control reversing valve 10 is connected to the oil tank, so the M-type three-position four-way hydraulic control reversing valve 27 works in the right position, and the A cavity of the auxiliary hydraulic pump/motor 24 is controlled by the M-type three-position four-way hydraulic control valve. The oil port PA of the reversing valve 27 is connected to the hydraulic accumulator 29, and the turntable 26 continues to rotate to drive the auxiliary hydraulic pump/motor 24 to work in the pump mode, and the hydraulic accumulator 29 is charged with oil, and the hydraulic accumulator 29 is at the same time The two chambers of the auxiliary hydraulic pump/motor 24 generate a pressure difference, which generates a reverse braking torque on the turntable 26 to realize the braking process of the turntable 26 .
同时，通过第一阻尼孔13产生的一个时间滞后，M型三位四通液控换向阀27工作在右工位后，第一两位两通液控换向阀15才工作在左工位，实现液压马达23的A腔压力的卸荷，使得转台26的制动力矩全部由辅助液压泵/马达24提供，避免了转台26的制动动能消耗在传统转台液压马达驱动附属单元9的制动溢流阀(未图示)，提高了能量回收效率。Simultaneously, after a time lag generated by the first damping hole 13, the M-type three-position four-way hydraulic control reversing valve 27 works in the right position, and the first two-position two-way hydraulic control reversing valve 15 works in the left position. position, to realize the unloading of the pressure in cavity A of the hydraulic motor 23, so that the braking torque of the turntable 26 is all provided by the auxiliary hydraulic pump/motor 24, which avoids the consumption of the braking kinetic energy of the turntable 26 in the traditional turntable hydraulic motor driving the auxiliary unit 9 The brake relief valve (not shown) improves energy recovery efficiency.
2)节流制动模式2) Throttle braking mode
当先导操作手柄1逐渐回到中位时，其输出压力信号b1逐渐减小但均大于某个先导压力阈值pi时，多路阀8并没有处于中位，多路阀8的油口A-T并没有完全关闭，转台处于半制动模式。液压马达23的A腔的制动压力由多路阀8的油口A-T的开度建立，多路阀8的油口A-T的开度越小，液压马达23的A腔的制动压力越大，转台26的制动力矩越大，反之多路阀8的油口A-T的开度越大，液压马达23的A腔的制动压力越小，转台26的制动力矩越小。When the pilot operating handle 1 gradually returns to the neutral position, its output pressure signal b 1 gradually decreases but is greater than a certain pilot pressure threshold p i , the multi-way valve 8 is not in the neutral position, and the oil port of the multi-way valve 8 The AT is not fully off, the turntable is in half brake mode. The braking pressure of chamber A of the hydraulic motor 23 is established by the opening degree of the oil port AT of the multi-way valve 8, the smaller the opening degree of the oil port AT of the multi-way valve 8, the greater the braking pressure of the chamber A of the hydraulic motor 23 , the greater the braking torque of the turntable 26, otherwise the larger the opening of the oil port AT of the multi-way valve 8, the smaller the braking pressure of the A cavity of the hydraulic motor 23, and the smaller the braking torque of the turntable 26.
此时由于先导操作手柄1的输出压力信号b2接近零值而b1大于先导压力阈值pi，第一两位三通液控换向阀11、第三两位三通液控换向阀19的的控制油口、第一液控单向阀17的控制油口和先导压力信号b1相通，第一两位三通液控换向阀11和第三两位三通液控换向阀19的控制油口工作在左工位，第一液控单向阀17反向导通，第五两位三通液控换向阀32的控制油口和液压马达23的A腔相连，由于液压马达23的A腔为高压侧，第五两位三通液控换向阀32工作在右工位，At this time, because the output pressure signal b 2 of the pilot operating handle 1 is close to zero and b 1 is greater than the pilot pressure threshold p i , the first two-position three-way hydraulic control reversing valve 11 and the third two-position three-way hydraulic control reversing valve The control oil port of 19, the control oil port of the first hydraulic control check valve 17 and the pilot pressure signal b1 are connected, the first two-position three-way hydraulic control reversing valve 11 and the third two-position three-way hydraulic control reversing The control oil port of the valve 19 works at the left position, the first hydraulic control check valve 17 conducts reversely, and the control oil port of the fifth two-position three-way hydraulic control reversing valve 32 is connected with the A chamber of the hydraulic motor 23, because The chamber A of the hydraulic motor 23 is the high-pressure side, and the fifth two-position three-way hydraulic control reversing valve 32 works at the right position.
因此M型三位四通液控换向阀27的控制油口K1通过第三两位三通液控换向阀19的油口P-A、第五两位三通液控换向阀32的油口A-T后和油箱相连；而M型三位四通液控换向阀27的控制油口K2经第四两位三通液控液控换向阀20的油口P-A，第一两位三通液控换向阀11的油口A-T接油箱，因此M型三位四通液控换向阀27工作在中位，辅助液压泵/马达24的A腔通过M型三位四通液控换向阀27直接和B腔相连。Therefore, the control oil port K1 of the M-type three-position four-way hydraulic control directional valve 27 passes through the oil port P-A of the third two-position three-way hydraulic control directional valve 19 and the oil of the fifth two-position three-way hydraulic control directional valve 32. The port A-T is connected to the oil tank; while the control oil port K2 of the M-type three-position four-way hydraulic control directional valve 27 passes through the oil port P-A of the fourth two-position three-way hydraulic control hydraulic control directional valve 20, the first two-position three-way The oil port A-T of the hydraulic control reversing valve 11 is connected to the fuel tank, so the M-type three-position four-way hydraulic control reversing valve 27 works in the neutral position, and the A cavity of the auxiliary hydraulic pump/motor 24 is controlled by the M-type three-position four-way hydraulic control valve. Reversing valve 27 directly links to each other with B cavity.
以上所述，仅为本发明较佳实施例而已，故不能依此限定本发明实施的范围，即依本发明专利范围及说明书内容所作的等效变化与修饰，皆应仍属本发明涵盖的范围内。The above is only a preferred embodiment of the present invention, so the scope of the present invention cannot be limited accordingly, that is, the equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still be covered by the present invention within range.
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Application publication date: 20150218 Assignee: Xiamen guoxineng Construction Machinery Co.,Ltd. Assignor: HUAQIAO University Contract record no.: X2024980005399 Denomination of invention: Energy saving turntable drive system for excavators based on dual motors and hydraulic accumulators Granted publication date: 20160817 License type: Exclusive License Record date: 20240520 |