CN102635539B - The power system of long-range nurse tanker water pump and the long-range nurse tanker of this system is housed - Google Patents
The power system of long-range nurse tanker water pump and the long-range nurse tanker of this system is housed Download PDFInfo
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Abstract
本发明涉及远程供水车领域，针对现有技术中水泵动力系统结构复杂、体积庞大或者能量损失大、泵易损坏的问题，本发明提出一种动力系统，其包括发动机、由发动机驱动的比例排量变量泵、与比例排量变量泵的出油口连接并且相互并联的安全卸荷阀和开关阀、与开关阀的出口连接并且驱动水泵的液压马达、过滤器、油箱及液压油管路；当开关阀关闭并且安全卸荷阀起卸荷阀作用时，液压马达的进油管路封闭；当开关阀开启并且安全卸荷阀起安全阀作用时，液压马达的转速通过调节比例排量变量泵的排量而最终控制水泵转速，进而调节水泵工况。采用比例排量变量泵，其排量可根据工况变化按预先设定的程序自动调节。这样就克服了现有技术中的技术问题。
The invention relates to the field of remote water supply vehicles. Aiming at the problems of complex structure, bulky volume, large energy loss and easy damage of the pump power system in the prior art, the invention proposes a power system, which includes an engine and a proportional exhaust driven by the engine. Quantitative variable pump, safety unloading valve and on-off valve connected to the oil outlet of the proportional displacement variable pump in parallel, hydraulic motor connected to the outlet of the on-off valve and driving the water pump, filter, oil tank and hydraulic oil pipeline; When the on-off valve is closed and the safety unloading valve acts as an unloading valve, the oil inlet pipeline of the hydraulic motor is closed; when the on-off valve is opened and the safety unloading valve acts as a safety valve, the speed of the hydraulic motor is adjusted by the proportional displacement variable pump. Displacement and finally control the speed of the pump, and then adjust the working condition of the pump. Proportional displacement variable pump is adopted, and its displacement can be automatically adjusted according to the preset program according to the change of working conditions. This overcomes the technical problems in the prior art.
Description
技术领域 technical field
本发明涉及远程供水车领域，尤其涉及用于远程供水车水泵的动力系统。The invention relates to the field of remote water supply vehicles, in particular to a power system for a water pump of a remote water supply vehicle.
背景技术 Background technique
在人类抗击各种重大灾难如进行消防灭火、应急供水及城市排涝时，远程供水车会起到重要作用。因此，远程供水车受到各个国家和各级政府的高度重视，具有广阔的市场。在远程供水车中，水泵的动力系统是关键部件之一。现有的远程供水车的水泵的动力系统主要有两种，一种是柴油机-发电机-电动机构成的电动动力系统，即柴油机带动发电机发电，然后供给电动机带动水泵吸水，这种动力系统的主要缺陷是结构复杂、体积庞大、布置欠灵活、受现场环境因素制约大；另一种是柴油机-定量液压泵-液压马达构成的液压动力系统，即柴油机带动定量液压泵，然后通过液体介质流动将能量输送给液压马达，带动水泵吸水，这种动力系统的主要缺陷是系统能量损失大，主要表现为溢流损失，而且水泵工况调节通过柴油机变速来实现，这种方式易造成液压泵损坏。Remote water supply vehicles will play an important role in the fight against various major disasters such as fire fighting, emergency water supply and urban drainage. Therefore, remote water supply vehicles are highly valued by various countries and governments at all levels, and have a broad market. In the remote water supply vehicle, the power system of the water pump is one of the key components. There are two main power systems for the water pumps of existing remote water supply vehicles. One is the electric power system composed of diesel engine-generator-motor, that is, the diesel engine drives the generator to generate electricity, and then supplies the electric motor to drive the water pump to absorb water. The power system of this kind The main disadvantages are complex structure, large volume, inflexible layout, and great constraints from on-site environmental factors; the other is the hydraulic power system composed of diesel engine-quantitative hydraulic pump-hydraulic motor, that is, the diesel engine drives the quantitative hydraulic pump, and then flows through the liquid medium The energy is sent to the hydraulic motor to drive the water pump to absorb water. The main defect of this power system is the large energy loss of the system, which is mainly manifested as overflow loss, and the adjustment of the working condition of the water pump is realized through the variable speed of the diesel engine. This method is easy to cause damage to the hydraulic pump. .
发明内容 Contents of the invention
为解决现有技术中水泵动力系统造成的问题，即要么结构复杂、体积庞大、布置欠灵活，要么能量损失大、液压泵易损坏，本发明提出一种动力系统，该动力系统包括发动机、由该发动机驱动的比例排量变量泵、与该比例排量变量泵的出油口连接并且相互并联的安全卸荷阀和开关阀、与所述开关阀的出口连接并且驱动水泵的液压马达、过滤器、油箱及液压油管路；当所述开关阀关闭并且安全卸荷阀起卸荷阀作用时，液压马达的进油管路封闭；当所述开关阀开启并且所述安全卸荷阀起安全阀作用时，所述液压马达的转速通过调节比例排量变量泵的排量而最终控制水泵转速，进而调节水泵工况。In order to solve the problems caused by the power system of the water pump in the prior art, that is, the structure is complex, the volume is large, the layout is not flexible, or the energy loss is large, and the hydraulic pump is easily damaged. The present invention proposes a power system, which includes an engine, a The proportional displacement variable pump driven by the engine, the safety unloading valve and the on-off valve connected to the oil outlet of the proportional displacement variable pump in parallel, the hydraulic motor connected to the outlet of the on-off valve and driving the water pump, the filter When the on-off valve is closed and the safety unloading valve acts as an unloading valve, the oil inlet line of the hydraulic motor is closed; when the on-off valve is opened and the safety unloading valve acts as a safety valve When functioning, the rotational speed of the hydraulic motor finally controls the rotational speed of the water pump by adjusting the displacement of the proportional displacement variable pump, thereby adjusting the working condition of the water pump.
由于液压传动的高功率密度特征、软管柔性连接特征及电液比例变量泵容积调速的无级平滑过渡特征，使得系统结构紧凑、布置灵活、调节方便且节能，可以克服柴油机-发电机-电动机的电动驱动系统的结构复杂、体积庞大、布置欠灵活受现场环境因素制约大和柴油机-定量液压泵-液压马达的液压驱动系统的能量损失大、水泵工况调节通过柴油机变速实现易造成液压泵损坏等缺陷。Due to the high power density characteristics of hydraulic transmission, the flexible connection characteristics of hoses and the stepless smooth transition characteristics of volumetric speed regulation of electro-hydraulic proportional variable pumps, the system has compact structure, flexible layout, convenient adjustment and energy saving, and can overcome diesel engine-generator- The structure of the electric drive system of the electric motor is complex, bulky, and the layout is not flexible. It is restricted by site environmental factors and the energy loss of the hydraulic drive system of diesel engine-quantitative hydraulic pump-hydraulic motor is large. Defects such as damage.
优选地，所述比例排量变量泵包括基泵、位置传感器、变量缸和比例阀。Preferably, the proportional displacement variable pump includes a base pump, a position sensor, a variable cylinder and a proportional valve.
优选地，所述安全卸荷阀为由第一先导阀、调压盖板和压力插件构成的二通插装型安全卸荷阀。Preferably, the safety unloading valve is a two-way cartridge type safety unloading valve composed of a first pilot valve, a pressure regulating cover plate and a pressure insert.
优选地，所述开关阀为由第二先导阀、梭阀盖板及方向插件构成的二通插装型液控开关阀。Preferably, the on-off valve is a two-way cartridge-type hydraulic control on-off valve composed of a second pilot valve, a shuttle valve cover plate and a direction insert.
本发明还提供一种远程供水车，该远程供水车中装有上述任意一种动力系统。The present invention also provides a remote water supply vehicle, which is equipped with any one of the above-mentioned power systems.
优选地，该远程供水车还包括将动力系统中的液压马达的高压油管路和低压油管路卷绕起来或放开的油管卷管系统；该油管卷管系统包括第一电磁换向阀、高压油管卷管马达、高压油管卷筒、高压回转接头以及低压油管卷管马达、低压油管卷筒和低压回转接头；所述高压油管卷筒设置在所述液压马达的进油管路上并且与所述高压回转接头配合而卷绕或放开所述高压油管路；所述低压油管卷筒设置在所述液压马达的排油管路上并且与所述低压回转接头配合而卷绕或放开所述低压油管路；所述第一电磁换向阀为中位机能为“Y”型的电磁换向阀并且该第一电磁换向阀的进油口和回油口分别与比例排量变量泵的出油口和过滤器的进油口相连；所述第一电磁换向阀的工作油口与所述高压油管卷管马达和所述低压油管卷管马达的进油口和出油口连接；经过所述第一电磁换向阀的液压油并联通向所述高压油卷管马达和低压油卷管马达，并且从所述高压油卷管马达和所述低压油卷管马达排出的液压油并联经过所述第一电磁换向阀返回所述油箱；所述油管卷管系统收放油管的速度通过调节所述比例排量变量泵的排量进行。Preferably, the remote water supply vehicle also includes an oil pipe reel system for winding or releasing the high-pressure oil pipeline and the low-pressure oil pipeline of the hydraulic motor in the power system; the oil pipe reel system includes a first electromagnetic reversing valve, a high-pressure oil pipe reel motor, high pressure oil pipe reel, high pressure rotary joint and low pressure oil pipe reel motor, low pressure oil pipe reel and low pressure rotary joint; the high pressure oil pipe reel is set on the oil inlet pipeline of the hydraulic motor and connected with the high pressure The swivel joint cooperates to wind or unwind the high-pressure oil pipeline; the low-pressure oil pipe reel is arranged on the oil discharge line of the hydraulic motor and cooperates with the low-pressure swivel joint to wind or unwind the low-pressure oil pipeline The first electromagnetic reversing valve is an electromagnetic reversing valve whose median function is "Y" type, and the oil inlet and oil return port of the first electromagnetic reversing valve are respectively connected with the oil outlet of the proportional displacement variable pump. It is connected with the oil inlet of the filter; the working oil port of the first electromagnetic reversing valve is connected with the oil inlet and the oil outlet of the high-pressure oil pipe reel motor and the low-pressure oil pipe reel motor; through the The hydraulic oil of the first electromagnetic reversing valve leads to the high-pressure oil coil motor and the low-pressure oil coil motor in parallel, and the hydraulic oil discharged from the high-pressure oil coil motor and the low-pressure oil coil motor passes through the The first electromagnetic reversing valve returns to the fuel tank; the speed of retracting and releasing the oil pipe of the oil pipe reel system is carried out by adjusting the displacement of the proportional displacement variable pump.
优选地，所述远程供水车还包括用于放下或提起液压马达和水泵的钢丝绳绞车系统，该钢丝绳绞车系统包括具有中位机能为“Y”型的第二电磁换向阀、绞车马达、梭阀、平衡阀和制动器；所述第二电磁换向阀的进油口和回油口分别与比例排量变量泵的出油口和过滤器的进油口相连，第二电磁换向阀的第一工作油口与绞车马达的正向进油口相连，绞车马达的正向出油口经平衡阀与第二电磁换向阀的第二工作油口相连，梭阀跨接第二电磁换向阀的第一工作油口和第二工作油口，取压油口接制动器；当所述第二电磁换向阀为中位时，绞车进出油口与回油通，油压为零，绞车在制动器的作用下制动，锁定外负荷；当所述第二电磁换向阀处于工作位并且所述安全卸荷阀起安全阀作用时，可进行外负荷收放所述液压马达和水泵；绞车的转速通过调控所述比例排量变量泵进行。Preferably, the remote water supply vehicle further includes a wire rope winch system for lowering or raising the hydraulic motor and the water pump. The wire rope winch system includes a second electromagnetic reversing valve with a "Y"-type neutral function, a winch motor, a shuttle Valve, balance valve and brake; the oil inlet and oil return port of the second electromagnetic reversing valve are respectively connected with the oil outlet of the proportional displacement variable pump and the oil inlet of the filter, and the oil inlet of the second electromagnetic reversing valve The first working oil port is connected with the positive oil inlet port of the winch motor, and the positive oil outlet port of the winch motor is connected with the second working oil port of the second electromagnetic reversing valve through the balance valve, and the shuttle valve is connected to the second electromagnetic reversing valve. The first working oil port and the second working oil port of the directional valve, and the pressure oil port is connected to the brake; when the second electromagnetic directional valve is in the neutral position, the oil inlet and outlet of the winch are connected to the return oil, and the oil pressure is zero. The winch brakes under the action of the brake to lock the external load; when the second electromagnetic reversing valve is in the working position and the safety unloading valve acts as a safety valve, the hydraulic motor and the water pump can be retracted by the external load ; The rotational speed of the winch is carried out by regulating the proportional displacement variable pump.
优选地，所述远程供水车还包括散热系统，所述散热系统包括风冷却器，该风冷却器的进油口与所述比例排量变量泵的泄漏油口相连，所述风冷却器的出油口与所述油箱相连。Preferably, the remote water supply vehicle also includes a heat dissipation system, the heat dissipation system includes an air cooler, the oil inlet of the air cooler is connected with the leakage oil port of the proportional displacement variable pump, and the air cooler The oil outlet is connected with the oil tank.
本发明构思了一种全液压驱动的远程供水车，它的液压系统具有高功率密度、安装布置灵活、调节方便及受现场环境因素制约少等优点，可广泛应用于消防、城市应急供水、快速排涝等领域。。The present invention conceives a fully hydraulically driven remote water supply vehicle. Its hydraulic system has the advantages of high power density, flexible installation and arrangement, convenient adjustment and less restriction by site environmental factors, etc. It can be widely used in fire protection, urban emergency water supply, rapid Drainage and other fields. .
本发明与背景技术相比，具有的有益效果是：Compared with the background technology, the present invention has the beneficial effects of:
1、结构紧凑、布置灵活，可远距离吸水。本发明系统驱动水泵的液压马达可与离心水泵集成安装，发挥液压系统的高功率密度优势，体积小重量轻，采用高压软管通油，软管长度根据水源远近可收放，实现远距离吸水且管路可任意布置，受环境空间约束小；1. Compact structure, flexible layout, and long-distance water absorption. The hydraulic motor driving the water pump in the system of the present invention can be integrated with the centrifugal water pump to take advantage of the high power density of the hydraulic system. It is small in size and light in weight. It uses a high-pressure hose to pass oil, and the length of the hose can be retracted according to the distance of the water source to realize long-distance water absorption. And the pipeline can be arranged arbitrarily, which is less restricted by the environmental space;
2、系统节能、操作调节自动化程度高。本发明系统变量泵调节采用电液比例控制技术，水泵工况采用液压容积调速方案通过变转速调节，无节流和溢流损失，系统效率高，自动化程度及可靠性高；2. The system is energy-saving and has a high degree of automation in operation and adjustment. The system variable pump adjustment of the present invention adopts the electro-hydraulic proportional control technology, and the water pump working condition adopts the hydraulic volume speed regulation scheme through the variable speed adjustment, without throttling and overflow loss, and the system has high efficiency, high degree of automation and high reliability;
3、本发明系统可广泛应用于消防、城市应急供水、快速排涝等多个领域。3. The system of the present invention can be widely used in many fields such as fire protection, urban emergency water supply, and rapid drainage.
附图说明 Description of drawings
图1是本发明的远程供水车水泵的动力系统回路及其他辅助功能回路的原理图。Fig. 1 is a schematic diagram of the power system circuit and other auxiliary function circuits of the water pump of the remote water supply vehicle of the present invention.
具体实施方式 Detailed ways
如图1所示，本发明的远程供水车水泵的动力系统包括发动机13(在这里，通常指柴油发动机)、由发动机13驱动的比例排量变量泵1、起调定压力作用的安全卸荷阀4、起开关作用的开关阀5、驱动水泵的液压马达9、油箱14、液压管路及回油管路上的过滤器3。在这里，比例排量变量泵1包括基泵1.1、位置传感器1.2、变量缸1.3和比例阀1.4。优选地，安全卸荷阀4包括第一先导阀4.1、调压盖板4.2和压力插件4.3，它们构成二通插装型安全卸荷阀4，其可以调定两个高压；开关阀5包括第二先导阀5.1、梭阀盖板5.2和方向插件5.3，它们构成二通插装型液控开关阀阀5，其用来开关通向液压马达9的油路。安全卸荷阀4和开关阀5并联，它们的进油口与比例排量变量泵1的出油口P相连，安全卸荷阀4的出油口与过滤器3的进油口T1相连，开关阀5的出油口A经过管路与液压马达9的进油口A1相连，液压马达9的出油口B1经过管路与过滤器3的进油口T1相连，过滤器3出油口T通过回油管路通向油箱14。As shown in Figure 1, the power system of the water pump of the remote water supply vehicle of the present invention includes an engine 13 (here, generally refers to a diesel engine), a proportional displacement variable pump 1 driven by the engine 13, a safety unloader that plays a role in setting pressure Valve 4, on-off valve 5 for switching, hydraulic motor 9 for driving the water pump, oil tank 14, filter 3 on the hydraulic pipeline and oil return pipeline. Here, the proportional displacement variable pump 1 includes a base pump 1.1, a position sensor 1.2, a variable cylinder 1.3 and a proportional valve 1.4. Preferably, the safety unloading valve 4 includes a first pilot valve 4.1, a pressure regulating cover plate 4.2 and a pressure insert 4.3, which constitute a two-way cartridge type safety unloading valve 4, which can adjust two high pressures; the switch valve 5 includes The second pilot valve 5.1, the shuttle valve cover plate 5.2 and the direction plug-in 5.3 constitute a two-way plug-in type hydraulic control switch valve 5, which is used to switch the oil circuit leading to the hydraulic motor 9. The safety unloading valve 4 and the on-off valve 5 are connected in parallel, and their oil inlets are connected with the oil outlet P of the proportional displacement variable pump 1, and the oil outlet of the safety unloading valve 4 is connected with the oil inlet T1 of the filter 3, The oil outlet A of the switch valve 5 is connected to the oil inlet A1 of the hydraulic motor 9 through the pipeline, the oil outlet B1 of the hydraulic motor 9 is connected to the oil inlet T1 of the filter 3 through the pipeline, and the oil outlet of the filter 3 is T leads to the oil tank 14 through the oil return line.
该动力系统采用比例排量变量泵，其排量可根据工况变化按预先设定的程序由比例阀1.4自动调节，当系统需要流量大时，比例阀1.4给定的控制电流大，反之则给定电流小。The power system adopts a proportional displacement variable pump, and its displacement can be automatically adjusted by the proportional valve 1.4 according to the change of working conditions according to the preset program. When the flow required by the system is large, the control current given by the proportional valve 1.4 is large. The given current is small.
针对上述动力系统，为优化功能，本发明还提供了油管卷管系统、钢丝绳绞车系统和散热系统。For the above power system, in order to optimize the function, the present invention also provides an oil pipe reel system, a wire rope winch system and a cooling system.
油管卷管系统主要用来卷绕或放开高压油管路和低压油管路，如图1所示，其包括第一电磁换向阀11、高压油管卷管马达6.1、高压油管卷筒8.1和高压回转接头7.1以及低压油管卷管马达6.2、低压油管卷筒8.2及低压回转接头7.2。第一电磁换向阀11为中位机能为“Y”型的电磁换向阀。第一电磁换向阀11的进油口和回油口分别与比例排量变量泵1的出油口P和过滤器3的进油口T1相连；第一电磁换向阀11的油口a2和b2分别与高低压油管卷管马达6.1、6.2的油口A2、A3和B2、B3相连。The oil hose reel system is mainly used to wind or unwind the high-pressure oil pipeline and the low-pressure oil pipeline. Rotary joint 7.1 and low-pressure oil pipe reel motor 6.2, low-pressure oil pipe reel 8.2 and low-pressure rotary joint 7.2. The first electromagnetic reversing valve 11 is a "Y" type electromagnetic reversing valve with a neutral function. The oil inlet and oil return port of the first electromagnetic reversing valve 11 are respectively connected with the oil outlet P of the proportional displacement variable pump 1 and the oil inlet T1 of the filter 3; the oil port a2 of the first electromagnetic reversing valve 11 and b2 are respectively connected with the oil ports A2, A3 and B2, B3 of the high and low pressure tubing reel motors 6.1, 6.2.
钢丝绳绞车系统包括具有中位机能为“Y”型的第二电磁换向阀10、绞车马达12.1、梭阀12.2、平衡阀12.3和制动器12.4。第二电磁换向阀10的进油口和回油口分别与比例排量变量泵1的出油口P和过滤器3的进油口T1相连，第二电磁换向阀10的油口a4与绞车马达油口A4相连，绞车马达油口B4经平衡阀12.3与第二电磁换向阀10的油口b4相连，梭阀12.2跨接油口a4、b4，取压油口接制动器12.4。钢丝绳绞车系统主要用来放下或提起液压马达9和水泵构成的集成块。The wire rope winch system includes a second electromagnetic reversing valve 10 with a "Y" type of neutral function, a winch motor 12.1, a shuttle valve 12.2, a balance valve 12.3 and a brake 12.4. The oil inlet and the oil return port of the second electromagnetic reversing valve 10 are respectively connected with the oil outlet P of the proportional displacement variable pump 1 and the oil inlet T1 of the filter 3, and the oil port a4 of the second electromagnetic reversing valve 10 It is connected with the oil port A4 of the winch motor, the oil port B4 of the winch motor is connected with the oil port b4 of the second electromagnetic reversing valve 10 through the balance valve 12.3, the shuttle valve 12.2 bridges the oil ports a4, b4, and the pressure oil port is connected with the brake 12.4. The wire rope winch system is mainly used to put down or lift the integrated block that the hydraulic motor 9 and the water pump constitute.
散热系统包括风冷却器2，其进油口与比例排量变量泵1的泄漏油口相连，出油口与油箱14相连。The cooling system includes an air cooler 2 , the oil inlet of which is connected with the leakage oil port of the proportional displacement variable pump 1 , and the oil outlet is connected with the oil tank 14 .
上述动力系统及三个辅助系统工作过程如下：The working process of the above power system and three auxiliary systems is as follows:
动力系统：回路控制元件采用二通插装阀结构，具有通流能力强、密封性能好，结构紧凑等优点，回路包括二通插装型安全卸荷阀4和二通插装型开关阀5两部分，两阀均由主阀插件、盖板、先导阀三部分组成。二通插装型安全卸荷阀4与二通插装型开关阀5并联，其进油口与比例排量变量泵的出油口相通，二通插装型安全卸荷阀4的出油口通过滤器3，二通插装型液控开关阀5的出油口经高压回转接头7.1通向液压马达A1口，液压马达B 1口经低压回转接头7.2通过滤器3。当1DT、2DT及3DT均断电时，二通插装型安全卸荷阀4起卸荷阀作用，动力源来油直接回油箱，泵卸荷，二通插装型液控开关阀5关闭，正反向均不通油，此时液压马达9的进油管路封闭，可防止水泵回水引起马达反转；当1DT、3DT断电、2DT通电时，二通插装型安全卸荷阀4的调压盖板4.2中第二调压阀4.2.2起作用，可设定主回路安全压力；当1DT、2DT断电、3DT通电时，二通插装型安全卸荷阀4的调压盖板4.2中第一调压阀4.2.1起作用，可设定油管卷管系统回路及钢丝绳绞车系统回路的安全压力；当1DT、2DT通电、3DT断电时，二通插装型液控开关阀5开启，二通插装型安全卸荷阀4做安全阀用，动力源来油通液压马达9的进油口A1，液压马达9的回油口B1通油箱14，液压马达9的转速通过比例阀1.4控制变量缸1.3调节变量泵1.1排量，从而控制水泵转速，调节水泵工况。Power system: The circuit control element adopts a two-way cartridge valve structure, which has the advantages of strong flow capacity, good sealing performance, and compact structure. The circuit includes a two-way cartridge safety unloading valve 4 and a two-way cartridge switch valve 5 Two parts, the two valves are composed of three parts: the main valve insert, the cover plate and the pilot valve. The two-way plug-in safety unloading valve 4 is connected in parallel with the two-way plug-in switching valve 5, and its oil inlet is connected with the oil outlet of the proportional displacement variable pump, and the oil outlet of the two-way plug-in safety unloading valve 4 The port passes through the filter 3, and the oil outlet of the two-way plug-in hydraulic control switch valve 5 leads to the hydraulic motor A1 port through the high-pressure rotary joint 7.1, and the hydraulic motor B1 port passes through the filter 3 through the low-pressure rotary joint 7.2. When 1DT, 2DT and 3DT are all powered off, the two-way plug-in type safety unloading valve 4 acts as an unloading valve, the oil from the power source is directly returned to the oil tank, the pump is unloaded, and the two-way plug-in type hydraulic control switch valve 5 is closed , the forward and reverse directions are not connected to oil, and the oil inlet pipeline of the hydraulic motor 9 is closed at this time, which can prevent the motor from reversing caused by the backwater of the water pump; The second pressure regulating valve 4.2.2 in the pressure regulating cover plate 4.2 works and can set the main circuit safety pressure; The first pressure regulating valve 4.2.1 in the cover plate 4.2 works, and can set the safety pressure of the circuit of the tubing reel system and the circuit of the wire rope winch system; The switch valve 5 is opened, the two-way plug-in safety unloading valve 4 is used as a safety valve, the power source oil is connected to the oil inlet A1 of the hydraulic motor 9, the oil return port B1 of the hydraulic motor 9 is connected to the oil tank 14, and the oil of the hydraulic motor 9 is connected to the oil tank 14. The speed is controlled by the proportional valve 1.4 to control the displacement of the variable cylinder 1.3 to adjust the displacement of the variable pump 1.1, thereby controlling the speed of the water pump and adjusting the working condition of the water pump.
油管卷管系统：该系统包括高压油管卷管和低压油管卷管两个支路，这两个支路成并联关系，均由第一电磁换向阀11控制，第一电磁换向阀11的进回油口分别与动力源P口、T口相通，第一电磁换向阀11的工作油口a2、b2分别与高低压油管卷管马达6.1、6.2的进出油口A2、A3与B2、B3相通。当6DT、7DT断电时，第一电磁换向阀11的中位“Y”型机能，可实现高低压油管卷管马达和高低压油管卷筒浮动，在外力作用下可收放高低压油管；当6DT、7DT分别通电、3DT通电时，油管卷管系统收放油管速度由比例阀1.4控制变量缸1.3通过调节变量泵1.1排量来实现控制。Tubing reel system: This system includes two branches of high pressure reel and low pressure reel, these two branches are connected in parallel, both are controlled by the first electromagnetic reversing valve 11, the first electromagnetic reversing valve 11 The inlet and outlet ports are connected to the P port and T port of the power source respectively, and the working oil ports a2 and b2 of the first electromagnetic reversing valve 11 are respectively connected to the inlet and outlet ports A2, A3 and B2 of the high and low pressure tubing reel motors 6.1 and 6.2. B3 is connected. When 6DT and 7DT are powered off, the middle position "Y" function of the first electromagnetic reversing valve 11 can realize the floating of the high and low pressure oil pipe reel motor and the high and low pressure oil pipe reel, and the high and low pressure oil pipe can be retracted and retracted under the action of external force ; When 6DT and 7DT are energized and 3DT is energized respectively, the oil pipe reel system retracts and unwinds the oil pipe speed by the proportional valve 1.4 to control the variable cylinder 1.3 by adjusting the displacement of the variable pump 1.1 to realize control.
钢丝绳绞车系统，该系统主要包括第二电磁换向阀10和绞车12组成。当4DT、5DT均断电时，因第二电磁换向阀10中位为“Y”型机能，绞车进出油口与回油通，油压为零，绞车在制动器12.4的作用下制动，锁定外负荷；当4DT、5DT分别通电、3DT通电时，因梭阀12.2跨接绞车马达12.1油口A4、B4，故可选择高压油通往制动器12.4，松开制动，实现外负荷收放，绞车12的转速由比例阀1.4控制变量缸1.3通过调节变量泵1.1排量来实现控制。A wire rope winch system mainly includes a second electromagnetic reversing valve 10 and a winch 12. When both 4DT and 5DT are powered off, because the middle position of the second electromagnetic reversing valve 10 is a "Y" function, the oil inlet and outlet of the winch are connected to the oil return, the oil pressure is zero, and the winch brakes under the action of the brake 12.4. Lock the external load; when 4DT and 5DT are energized respectively and 3DT is energized, because the shuttle valve 12.2 bridges the oil ports A4 and B4 of the winch motor 12.1, the high-pressure oil can be selected to lead to the brake 12.4, and the brake is released to realize the external load retraction , The rotational speed of the winch 12 is controlled by the proportional valve 1.4 and the variable cylinder 1.3 is controlled by adjusting the displacement of the variable pump 1.1.
散热系统，该系统回路主要元件为风冷却器2，其进油口与液压泵泄漏油口相通，出油口与油箱相通，依靠比例排量变量泵1内泄漏油液的流动，将泵中因各种损失而产生的热量带走通过散热器散发掉，维持液压系统的热平衡。同时由于散热器的主动散热，还可减小油箱自身的体积，使整个液压系统更紧凑。The heat dissipation system, the main component of the system circuit is the air cooler 2, the oil inlet of which communicates with the leakage oil port of the hydraulic pump, and the oil outlet communicates with the oil tank, relying on the flow of the leakage oil in the proportional displacement variable pump 1, the pump will The heat generated by various losses is taken away and dissipated through the radiator to maintain the thermal balance of the hydraulic system. At the same time, due to the active heat dissipation of the radiator, the volume of the oil tank itself can also be reduced, making the entire hydraulic system more compact.
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