WO2013134921A1 - 空气弹簧支撑***充排气控制装置 - Google Patents

空气弹簧支撑***充排气控制装置 Download PDF

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Publication number
WO2013134921A1
WO2013134921A1 PCT/CN2012/072244 CN2012072244W WO2013134921A1 WO 2013134921 A1 WO2013134921 A1 WO 2013134921A1 CN 2012072244 W CN2012072244 W CN 2012072244W WO 2013134921 A1 WO2013134921 A1 WO 2013134921A1
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WIPO (PCT)
Prior art keywords
support system
spring support
solenoid valve
air spring
exhaust
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PCT/CN2012/072244
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English (en)
French (fr)
Inventor
石军
郑晖
张华�
王磊
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青岛四方车辆研究所有限公司
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Application filed by 青岛四方车辆研究所有限公司 filed Critical 青岛四方车辆研究所有限公司
Priority to BR112014022603-2A priority Critical patent/BR112014022603B1/pt
Priority to IN1762KON2014 priority patent/IN2014KN01762A/en
Priority to PCT/CN2012/072244 priority patent/WO2013134921A1/zh
Publication of WO2013134921A1 publication Critical patent/WO2013134921A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics

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  • the invention relates to a railway vehicle fatigue and vibration test bed air spring support system, in particular to a railway freight car fatigue and vibration test stand air spring support system charge and exhaust control device.
  • the air spring support system In the fatigue test condition of the railway vehicle body, the air spring support system mainly plays the static bearing effect on the railway truck body and the longitudinal loading rod. When the vehicle body is tested, it is followed by the vehicle body loading actuator, the air spring. The system does not perform charging and exhausting operations. Due to the different weights of different truck bodies, it is necessary to make the air spring system have different bearing capacity. The bearing capacity of the air spring bearing system is realized by adjusting the compressed air pressure inside the air spring. Therefore, a special charging and exhausting is required.
  • the control device implements charge and exhaust control of the air spring support system. At the same time, in order to make the air spring support system have a stable working state, the charge and exhaust control system should also have the functions of overpressure alarm, leakage alarm and automatic charging and exhausting. At present, there is no device capable of realizing the control function of the professional.
  • the present invention is a device specially developed for the problem of charge and exhaust control of the air spring support system of the railway truck fatigue and vibration test bed.
  • the object of the present invention is to provide the air spring support system charge and exhaust control device for the air spring support system of the railway freight car fatigue and vibration test stand, which is used for the fatigue and vibration of the railway vehicle.
  • the test bed air spring support system realizes the charge and exhaust control of the air spring, and the air spring can have different inflation pressures, thereby realizing static load on different vehicle body weights.
  • the technical solution of the present invention is: an air spring support system charging and exhausting control device, the charging and exhausting control device is provided with a field control box and an indoor control box, and a pneumatic solenoid valve and an exhaust solenoid valve are installed in the field control box.
  • One end of the pneumatic solenoid valve is connected to the main air supply line, and one end is connected with an additional air chamber of the air spring support system for inflating the air spring support system, and one end of the exhaust solenoid valve is connected with the additional air chamber of the air spring support system.
  • a PLC controller is installed in the indoor control box, and a human-machine interface is connected with the PLC controller, and the PLC controller is respectively connected with the gas-filled solenoid valve and the row
  • the gas solenoid valve is electrically connected and electrically connected to a pressure transmitter disposed on the additional air chamber of the air spring support system;
  • each of which is connected to the main air supply line, and one end is connected to an additional air chamber of the air spring support system; each exhaust solenoid valve One end is connected to an additional air chamber of the air spring support system, and one end is connected to the atmosphere;
  • both the pneumatic solenoid valve and the exhaust solenoid valve are two-position two normally closed solenoid valves
  • the on-site control box is provided with an inflation button and an exhaust button, which are respectively connected with the inflation solenoid valve and the exhaust solenoid valve for controlling the charging and exhausting of the air spring support system;
  • the indoor control box is provided with a pressure alarm device for overpressure alarm and pressure leakage alarm;
  • the pressure alarm device is a pressure alarm, and the pressure alarm is connected to the PLC controller;
  • the main air supply line is provided with a ball valve for controlling charging and exhausting, and the main air supply line, the gas filling electromagnetic valve and the exhaust electromagnetic valve are respectively connected with a pressure gauge, and the exhaust electromagnetic valve is connected with a muffler;
  • the main air supply line is connected to an air compressor, and the first oil water filter, the gas storage tank, the second oil water filter and the pressure reducing valve are sequentially connected between the main air supply line and the air compressor.
  • the invention has the beneficial effects that the invention controls the action of the pneumatic solenoid valve and the exhaust solenoid valve through the PLC controller, and the air spring support system is charged and exhausted, so that the air spring support system has different inflation pressures, and the different vehicles are realized. Static load of body weight.
  • the charging and exhausting control device of the invention can simultaneously realize the simultaneous charging and discharging control of the six-way air spring, and can also perform the charging and exhausting control of the single air spring, and at the same time, the pressure alarm device is provided, and the overpressure alarm and the pressure leakage alarm are provided. The function ensures that the air spring has the bearing capacity required by the test bench.
  • FIG. 1 is an electrical schematic diagram of a specific embodiment of the present invention.
  • FIG. 2 is a piping layout diagram of an air spring support system in accordance with an embodiment of the present invention.
  • FIG. 3 is an electrical schematic diagram of a field control box in accordance with an embodiment of the present invention.
  • an air spring support system charging and exhausting control device is provided with a field control box 1 and an indoor control box 2, and 6 pneumatic solenoid valves are installed in the field control box.
  • 6 exhaust solenoid valves 4 the pneumatic solenoid valve 3 and the exhaust solenoid valve 4 are both two-position two normally closed solenoid valves, each of which is connected to the main air supply line at one end and supported by an air spring at one end.
  • the additional air chambers 9 of the system are connected to form an inflation pipeline for inflating the air spring support system; each of the exhaust solenoid valves is connected at one end to an additional air chamber 9 of the air spring support system, and one end is connected to the atmosphere to form An exhaust line for exhausting the air spring support system; the field control box 1 is provided with an inflation button and an exhaust button, respectively connected to the charge solenoid valve 3 and the exhaust solenoid valve 4 for controlling the air spring Charge and exhaust of the support system.
  • a PLC controller and a man-machine interface are installed in the indoor control box 2, and the man-machine interface is connected with the PLC controller as a feedback input of the logic control input and the detection signal; the PLC controller is respectively associated with the charge solenoid valve 3 and the exhaust
  • the solenoid valve 4 is electrically connected for controlling the action of the charge solenoid valve 3 and the exhaust solenoid valve 4, achieving charge and exhaust control, and electrically connecting with the pressure transmitter 5 disposed on the additional air chamber of the air spring support system to receive the pressure.
  • indoor control box 2 is provided with pressure alarm device for overpressure alarm and pressure leakage alarm; pressure alarm device is pressure alarm, the pressure alarm is connected with PLC controller, when When the pressure detected by the pressure transmitter exceeds the set value, or the pressure is lower than the set value and the set value cannot be reached within 15 minutes, an alarm is issued.
  • the main air supply line is provided with a ball valve 6 for controlling charging and exhausting, and the main air supply line, the gas filling solenoid valve 3 and the exhaust electromagnetic valve 4 are respectively connected with a pressure gauge 7, and the exhaust electromagnetic valve 4 is connected with a muffler 8; the main air supply pipe
  • the road is connected to an air compressor 10, and a first oil water filter 11, a gas storage tank 12, a second oil water filter 13, and a pressure reducing valve 14 are sequentially connected between the main air supply line and the air compressor 10.
  • the single-actual-manual control function of the indoor control box sets the control function to “single-manual” on the man-machine interface.
  • the 6-way inflation pipelines are independent and need to be inflated for a certain way on the human-machine interface. Click the inflation button, the PLC controller outputs the command, and the inflation solenoid valve that controls the road can be inflated. Click the inflation button again to close the inflation solenoid valve to complete the inflation process.
  • the exhaust button on the man-machine interface the PLC controller outputs a command, and the exhaust solenoid valve that controls the way can be exhausted, and the exhaust button is clicked again. That is, the exhaust solenoid valve is closed to complete the exhaust process.
  • the single-action-automatic control function of the indoor control box sets the control function to “single-action-automatic” on the man-machine interface.
  • the 6-channel inflation pipelines are independent, and need to be charged for a certain road.
  • the PLC controller sets the pressure value in the loop parameter of a certain channel on the machine interface, and then click the inflation button, the PLC controller outputs the command, and the inflation solenoid valve that controls the way can be inflated. If the pressure reaches the set value, the inflation is turned off. The solenoid valve completes the inflation process; if the pressure exceeds the set value, the PLC controller outputs a command to turn on the exhaust solenoid valve that controls the passage to perform the exhaust operation. When the pressure reaches the set value, the exhaust solenoid valve is closed to complete the exhaust process.
  • the interlocking-manual control function of the indoor control box sets the control function to “linkage-manual” on the man-machine interface.
  • the 6-way inflation pipelines are associated with each other, and at the same time, the charging and exhausting actions are performed, and when the 6-way inflation is required, Click on the inflating button of any circuit on the man-machine interface, the PLC controller outputs the command, and the 6 pneumatic solenoid valves that control the 6-way inflation pipeline can be inflated. Click the inflation button again to close the 6 inflatable electromagnetics. Valve to complete the inflation process.
  • the interlocking-automatic control function of the indoor control box sets the control function to “linkage-automatic” on the man-machine interface.
  • the 6-channel inflation pipelines are associated with each other, and at the same time, the inflation operation is performed, and the 6-channel inflation pipeline needs to be automatically
  • the PLC controller When inflating, it is necessary to set the pressure value of each channel in the loop parameters of the 6-channel inflation pipeline on the man-machine interface, and then click the inflation button of any loop, the PLC controller outputs the command, and the control of the 6-channel inflation pipeline is turned on.
  • the pneumatic solenoid valve can be inflated for 6 channels.
  • the pneumatic solenoid valve of this way is closed, the inflation process is completed, and the other pipelines continue to be inflated to the set value, then the pneumatic solenoid valve is closed, and 6 channels are completed.
  • the PLC controller outputs a command to turn on the exhaust solenoid valve that controls the road to perform the exhausting action, and the pressure reaches the set value type, that is, the exhaust solenoid valve is closed. , complete the exhaust process of the road.
  • the manual inflation function of the on-site control box installs a manual button for each of the inflation solenoid valve and the exhaust solenoid valve on the panel of the field control box, which can perform simple charge and exhaust control, and the pointer pressure is set on the field control box.
  • the table shows the internal pressure of the 6-way air spring support system.
  • Overpressure alarm and leakage alarm function on the man-machine interface of the indoor control box, set the pressure fluctuation range for a certain road, and the pressure transmitter feeds back the detected pressure signal to the PLC controller.
  • the pressure alarm will alarm, the alarm light will light up, and a beep will sound.
  • the pressure will not reach the set value within fifteen minutes, indicating the pipeline.
  • the pressure alarm starts to alarm, the alarm light lights up, and a beep sounds. Click the alarm on the man-machine interface to silence the sound, and the pressure alarm returns to the initial state to re-detect the air spring.
  • the pressure of the support system changes.
  • the inflatable solenoid valve and the exhaust solenoid valve can also be set to 3, 4, 5, which constitutes 3, 4, and 5 channels of charge and exhaust pipes for charge and exhaust control, and even more road charge and exhaust control, Realize the charge and exhaust control of the multi-channel air spring support system.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Fluid Pressure (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

一种空气弹簧支承***充排气控制装置，包括现场控制箱（1）和室内控制箱（2）。现场控制箱（1）内安装有充气电磁阀（3）和排气电磁阀（4）。室内控制箱（2）内安装有一个PLC控制器，PLC控制器分别与充气电磁阀（3）和排气电磁阀（4）电连接，并与设置在空气弹簧支承***附加气室（9）上的压力变送器（5）电连接。通过PLC控制器控制充气电磁阀（3）和排气电磁阀（4）动作，对空气弹簧支承***进行充排气，使空气弹簧支承***具有不同的充气压力，实现了对不同车体重量的静态承载。

Description

空气弹簧支撑***充排气控制装置 技术领域
本发明涉及一种铁路车辆疲劳与振动试验台空气弹簧支承***，具体地说，涉及一种铁路货车疲劳与振动试验台空气弹簧支承***充排气控制装置 。
 背景技术
在铁路车辆车体进行疲劳试验工况中，空气弹簧支承***主要是对铁路货车车体和纵向加载杆其静态承载作用，在车体进行试验时与车体加载作动器随动，空气弹簧***不进行充排气动作。由于不同货车车体重量不同，需要使空气弹簧***具有不同的承载能力，空气弹簧支承***的承载能力是通过调节空气弹簧内部的压缩空气压力来实现的，因此，需要一种专门的充排气控制装置来实现对空气弹簧支承***的充排气控制。同时，为了使空气弹簧支承***具有稳定的工作状态，充排气控制***还应具有超压报警，泄漏报警和自动充排气的功能。而目前还没有一种装置能够实现此项专业的控制功能，本发明就是针对此问题而研制的专门用于铁路货车疲劳与振动试验台空气弹簧支承***充排气控制的一种装置。
 发明内容
本发明的目的在于针对铁路货车疲劳与振动试验台的空气弹簧支承***存在上述充排气控制问题，提供了一种空气弹簧支承***充排气控制装置，该控制装置用于铁路车辆疲劳与振动试验台空气弹簧支承***，实现对空气弹簧的充排气控制，可以使空气弹簧具有不同的充气压力，从而实现对不同车体重量的静态承载。
本发明的技术方案为：一种空气弹簧支承***充排气控制装置，该充排气控制装置设置有现场控制箱和室内控制箱，现场控制箱内安装有充气电磁阀和排气电磁阀，充气电磁阀一端与主供气管路连接，一端与空气弹簧支承***的附加气室连接，用于对空气弹簧支承***进行充气控制，排气电磁阀一端与空气弹簧支承***的附加气室连接，一端与大气连通，用于对空气弹簧支承***进行排气控制；室内控制箱内安装有一个PLC控制器、以及一个与PLC控制器连接的人机界面，PLC控制器分别与充气电磁阀和排气电磁阀电连接，并与设置在空气弹簧支承***附加气室上的压力变送器电连接；
优选的是，充气电磁阀和排气电磁阀均设置有6个，每个充气电磁阀均一端与主供气管路连接，一端与空气弹簧支承***的附加气室连接；每个排气电磁阀均一端与空气弹簧支承***的附加气室连接，一端与大气连通；
优选的是，充气电磁阀和排气电磁阀均采用二位二通常闭电磁阀；
优选的是，现场控制箱上设置有充气按钮和排气按钮，分别与充气电磁阀和排气电磁阀连接，用于控制空气弹簧支承***的充排气；
优选的是，室内控制箱内设置有压力报警装置，用于超压报警和压力泄露报警；
优选的是，所述的压力报警装置为压力报警器，该压力报警器与PLC控制器连接；
优选的是，主供气管路上设置有控制充排气的球阀，主供气管路、充气电磁阀和排气电磁阀分别连接有压力表，排气电磁阀与一个***连接；
优选的是，主供气管路与一个空气压缩机连接，主供气管路与空气压缩机之间依次连接有第一油水过滤器、储气罐、第二油水过滤器和减压阀。
本发明的有益效果为：本发明通过PLC控制器控制充气电磁阀和排气电磁阀动作，对空气弹簧支承***进行充排气，使空气弹簧支承***具有不同的充气压力，实现了对不同车体重量的静态承载。本发明充排气控制装置可同时实现对六路空气弹簧进行同时充排气控制，也可以对单独一路空气弹簧进行充排气控制，同时，设置有压力报警装置，具有超压报警、压力泄露报警功能，保证了空气弹簧具有试验台要求的承载能力。
 附图说明
图1为本发明具体实施例的电气原理图。
图2为本发明具体实施例空气弹簧支承***的管路布置图。
图3为本发明具体实施例现场控制箱的电气原理图。
 具体实施方式
以下结合附图对本发明作进一步说明。
如图1至3所示，一种空气弹簧支承***充排气控制装置，该充排气控制装置设置有现场控制箱1和室内控制箱2，现场控制箱内安装有6个充气电磁阀3和排6个排气电磁阀4，充气电磁阀3和排气电磁阀4均采用二位二通常闭电磁阀，每个充气电磁阀3均一端与主供气管路连接，一端与空气弹簧支承***的附加气室9连接，构成充气管路，用于对空气弹簧支承***进行充气控制；每个排气电磁阀均一端与空气弹簧支承***的附加气室9连接，一端与大气连通，构成排气管路，用于对空气弹簧支承***进行排气控制；现场控制箱1上设置有充气按钮和排气按钮，分别与充气电磁阀3和排气电磁阀4连接，用于控制空气弹簧支承***的充排气。室内控制箱2内安装有一个PLC控制器和一个人机界面，人机界面与PLC控制器连接，作为逻辑控制的输入与检测信号的反馈显示；PLC控制器分别与充气电磁阀3和排气电磁阀4电连接，用于控制充气电磁阀3和排气电磁阀4动作，实现充排气控制，并与设置在空气弹簧支承***附加气室上的压力变送器5电连接，接收压力信号，进行压力的实时显示与检测；室内控制箱2内设置有压力报警装置，用于超压报警和压力泄露报警；压力报警装置为压力报警器，该压力报警器与PLC控制器连接，当压力变送器检测的压力超过设定值、或者压力低于设定值且在15分钟内不能达到设定值时，进行报警。主供气管路上设置有控制充排气的球阀6，主供气管路、充气电磁阀3和排气电磁阀4分别连接有压力表7，排气电磁阀4与一个***8连接；主供气管路与一个空气压缩机10连接，主供气管路与空气压缩机10之间依次连接有第一油水过滤器11、储气罐12、第二油水过滤器13和减压阀14。
工作原理：
室内控制箱的单动-手动控制功能，在人机界面上将控制功能设置成“单动-手动”，此时6路充气管路各自独立，需要为某一路充气时，在人机界面上点击充气按钮，PLC控制器输出指令，接通控制这一路的充气电磁阀即可为其充气，再次点击充气按钮，即关闭充气电磁阀，完成充气过程。同理，需要为某一路排气时，在人机界面上点击排气按钮，PLC控制器输出指令，接通控制这一路的排气电磁阀即可为其排气，再次点击排气按钮，即关闭排气电磁阀，完成排气过程。
室内控制箱的单动-自动控制功能，在人机界面上将控制功能设置成“单动-自动”，此时6路充气管路各自独立，需要为某一路充排气时，需要在人机界面上某一路的回路参数中设置好压力值，然后点击充气按钮，PLC控制器输出指令，接通控制这一路的充气电磁阀即可为其充气，如果压力达到设定值，即关闭充气电磁阀，完成充气过程；如有压力超过设定值，PLC控制器输出指令，接通控制这一路的排气电磁阀，进行排气动作。压力达到设定值式，即关闭排气电磁阀，完成排气过程。
室内控制箱的联动-手动控制功能，在人机界面上将控制功能设置成“联动-手动”，此时6路充气管路彼此关联，同时进行充排气动作，需要为6路充气时，在人机界面上点击任一回路的充气按钮，PLC控制器输出指令，接通控制6路充气管路的6个充气电磁阀即可为其充气，再次点击充气按钮，即关闭6个充气电磁阀，完成充气过程。同理，需要为6路排气时，在人机界面上点击任一回路的排气按钮，PLC控制器输出指令，接通控制6路排气管路的6个排气电磁阀即可为其排气，再次点击排气按钮，即关闭6个排气电磁阀，完成排气过程。
室内控制箱的联动-自动控制功能，在人机界面上将控制功能设置成“联动-自动”，此时6路充气管路彼此关联，同时进行充气动作，需要为6路充气管路进行自动充气时，需要在人机界面上6路充气管路的回路参数中设置好每一路的压力值，然后点击任一回路的充气按钮，PLC控制器输出指令，接通控制6路充气管路的充气电磁阀即可为6路充气，如果某一路压力达到设定值，即关闭这一路的充气电磁阀，完成充气过程，其它管路继续充气至设定值后关闭充气电磁阀，完成6路的充气过程，如果某一路压力超过设定值，PLC控制器输出指令，接通控制这一路的排气电磁阀，进行排气动作，压力达到设定值式，即关闭该路排气电磁阀，完成该路的排气过程。
现场控制箱的手动充气功能，在现场控制箱的面板上为每一个充气电磁阀和排气电磁阀安装了一个手动按钮，可以进行简单的充排气控制，现场控制箱上设置有指针式压力表，可以显示6路空气弹簧支承***的内部压力。需要为某一路充气时，只需按下这一路的充气按钮，充气电磁阀即可为这一路充气，停止充气时只需再次按下充气按钮，关闭充气电磁阀，即可完成充气功能。同理，需要为某一路排气时，只需按下这一路的排气按钮，排气电磁阀即可为这一路排气，停止排气时只需再次按下排气按钮，关闭排气电磁阀，即可完成排气功能。
超压报警、泄漏报警功能，在室内控制箱的人机界面上，为某一路设置压力的波动范围，压力变送器将检测的压力信号反馈给PLC控制器, 当压力超过设定值时，压力报警器即报警，报警灯亮起，并发出蜂鸣声，等压力持续低于设定值时，压力在十五分钟内不能达到设定值时，表明管路有泄露或主供风管路中压力不足，此时压力报警器开始报警，报警灯亮起，并发出蜂鸣声，点击人机界面上的报警器消音，压力报警器恢复初始状态重新检测空气弹簧支承***的压力变化。
其中，充气电磁阀和排气电磁阀还可以设置为3、4、5个，构成3路、4路、5路充排气管路进行充排气控制，甚至更多路充排气控制，实现多路空气弹簧支承***的充排气控制。
以上具体实施方式仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围，其均应涵盖在本发明的权利要求范围当中。

Claims (8)

1. 一种空气弹簧支承***充排气控制装置，其特征在于：该充排气控制装置设置有现场控制箱和室内控制箱，现场控制箱内安装有充气电磁阀和排气电磁阀，充气电磁阀一端与主供气管路连接，一端与空气弹簧支承***的附加气室连接，用于对空气弹簧支承***进行充气控制，排气电磁阀一端与空气弹簧支承***的附加气室连接，一端与大气连通，用于对空气弹簧支承***进行排气控制；室内控制箱内安装有一个PLC控制器、以及一个与PLC控制器连接的人机界面，PLC控制器分别与充气电磁阀和排气电磁阀电连接，并与设置在空气弹簧支承***附加气室上的压力变送器电连接。
2. 根据权利要求1所述的空气弹簧支承***充排气控制装置，其特征在于：充气电磁阀和排气电磁阀均设置有6个，每个充气电磁阀均一端与主供气管路连接，一端与空气弹簧支承***的附加气室连接；每个排气电磁阀均一端与空气弹簧支承***的附加气室连接，一端与大气连通。
3. 根据权利要求1或2任意一项所述的空气弹簧支承***充排气控制装置，其特征在于：充气电磁阀和排气电磁阀均采用二位二通常闭电磁阀。
4. 根据权利要求1所述的空气弹簧支承***充排气控制装置，其特征在于：现场控制箱上设置有充气按钮和排气按钮，分别与充气电磁阀和排气电磁阀连接，用于控制空气弹簧支承***的充排气。
5. 根据权利要求1所述的空气弹簧支承***充排气控制装置，其特征在于：室内控制箱内设置有压力报警装置，用于超压报警和压力泄露报警。
6. 根据权利要求5所述的空气弹簧支承***充排气控制装置，其特征在于：所述的压力报警装置为压力报警器，该压力报警器与PLC控制器连接。
7. 根据权利要求1或2任意一项所述的空气弹簧支承***充排气控制装置，其特征在于：主供气管路上设置有控制充排气的球阀，主供气管路、充气电磁阀和排气电磁阀分别连接有压力表，排气电磁阀与一个***连接。
8. 根据权利要求7所述的空气弹簧支承***充排气控制装置，其特征在于：主供气管路与一个空气压缩机连接，主供气管路与空气压缩机之间依次连接有第一油水过滤器、储气罐、第二油水过滤器和减压阀。
PCT/CN2012/072244 2012-03-13 2012-03-13 空气弹簧支撑***充排气控制装置 WO2013134921A1 (zh)

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