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挖掘机加长臂工作速度过快的解决方法

日期:2018-09-19   来源:/
1、原因形成:
1, causes:
配装了加长臂工作装置的挖掘机,由于其动臂和斗杆较长、工作范围较大,按正常挖掘机工作速度设定时,其动臂及斗杆线速度过快,操作手难以控制,容易发生安全事故。故需解决加长臂工作装置动作速度过快问题。
The excavator equipped with the working device of the extended arm has a long arm and bucket bar, and has a large working range. When the working speed of the excavator is set according to the normal working speed, the linear speed of the arm and bucket bar is too fast for the operator to control, and it is easy to cause safety accidents. Therefore, it is necessary to solve the problem of excessive speed of the long arm working device.
2、选择改进方案:
2, choose the improvement plan:
挖掘机工作装置的主控阀由先导压力油控制,先导压力油进入主控阀阀芯端部,推动主控阀阀芯左、右移动,将主控阀回路打开。可采用减小主控阀通径的方法进行改进。
The main control valve of the excavator working device is controlled by the pilot pressure oil. The pilot pressure oil enters the end of the main control valve spool, pushes the main control valve spool to move left and right, and opens the main control valve loop. The method of reducing the diameter of the main control valve can be used for improvement.
根据该主控阀阀芯行程和通流面积曲线可以看出,主控阀阀芯开启过程是逐渐增大的,阀芯行程越大,主控阀通流面积就越大。当阀芯运动到行程的末端,开口达到最大时,通过主控阀的流量达到最大。
加长臂挖掘机出租
According to the curve of the spool stroke and flow area of the main control valve, it can be seen that the opening process of the main control valve spool is gradually increasing. The larger the spool stroke, the larger the flow area of the main control valve. When the spool moves to the end of the stroke and the opening reaches the maximum, the flow through the main control valve reaches the maximum.
由此可见,对主控阀阀芯进行限位,可以减小阀芯行程。当主控阀阀芯向左、右端移动时,控制主控阀阀芯不能达到全行程,主控阀阀口开度不能达到最大值,就可减小通流面积,降低流向液压缸的流量,从而降低工作装置速度。
It can be seen that the valve core can be reduced by limiting the spool of the main control valve. When the spool of the main control valve moves to the left and right, the spool of the main control valve can not reach the full stroke, and the opening of the main control valve can not reach the maximum value, so the flow area can be reduced and the flow to the hydraulic cylinder can be reduced, thus reducing the speed of the working device.
3、实施及验证:
3, implementation and verification:
根据以上分析,通过对主控阀测量,确认其阀芯全行程量为10mm。安装主控阀阀芯行程限位接头后,工作装置速度明显降低。
According to the above analysis, through the measurement of the main control valve, it is confirmed that the full stroke of the spool is 10mm. After installing the main control valve spool, the working speed of the device is obviously reduced.
以动劈下降为例,安装行程限位接头后进行操纵性及协调性试验,发现安装限制行程为2.5mm的阀芯行程限位接头时,动臂下降的各项指标及整机的操纵性及协调性均达到标准工作装置挖掘机动臂下降速度,能够满足挖掘机出要求。
Taking the moving wedge descent as an example, the maneuverability and coordination tests were carried out after installing the stroke limit joint. It was found that when installing the valve core stroke limit joint with the limit stroke of 2.5mm, the indexes of the arm descent and the maneuverability and coordination of the whole machine all reached the standard working device, and the arm descending speed of the excavator could meet the requirements of the excavator. .
有了上面的小总结,希望对广大客户有所帮助,如果有什么不理解的或者寻求帮助的请点击我们的官方网站:加长臂挖掘机租赁
With the above summary, I hope it will be helpful to our customers. If you don't understand or ask for help, please click our official website: Extended Arm Excavator Rental
或者来电咨询,我们会尽全力为您解决
or call for consultation, we will do our best to solve it for you.

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