为印证相关判断，这里我们对液压回路及相关液压阀进行了以下排查，下面冷再生机租赁厂家为您解答。

In order to confirm the relevant judgment, here we have conducted the following troubleshooting for the hydraulic circuit and related hydraulic valves, and the cold regeneration machine rental manufacturer will answer for you.

检查比例换向阀，发现该阀阀块下面有4个圆形油道口，采取对各油道通入压缩空气的方法测试，以检验其阀芯密封性好坏。检查结果表明，比例换向阀密封良好。

Check the proportional directional valve and find that there are four circular oil passages under the valve block. Test the tightness of the valve core by injecting compressed air into each oil passage. The inspection results show that the proportional reversing valve is well sealed.

检查压差阀和平衡阀阀座、阀芯是否有磨损以及密封件有无破损老化情况。在该回路中，只有压差阀和平衡阀的阀体上带有密封件，如其密封不好，会影响系统压力。

Check whether the valve seat and valve core of differential pressure valve and balance valve are worn and whether the seals are damaged and aged. In this circuit, only the valve bodies of the differential pressure valve and the balance valve are equipped with seals. If the seal is not good, the system pressure will be affected.

检查发现，压差阀和平衡阀外部金属阀座及密封没有明显磨损及细小划痕，平衡阀内部密封圈上有缺口及破损，由此确定问题在平衡阀。对平衡阀进行更换后，冷再生机可以在高温环境中长期可靠运转，没有再出现被刨鼓不能提升的故障。

Through inspection, it was found that the metal valve seat and seal outside the differential pressure valve and balance valve were free of obvious wear and small scratches, and there were gaps and damages on the internal sealing ring of the balance valve, so it was determined that the problem was in the balance valve. After the balance valve is replaced, the cold regenerator can operate reliably in a high temperature environment for a long time, without the failure of being unable to lift by the planing drum.

该故障产生的机理如下：当操纵铁刨鼓提升时，换向阀将压力油导入右侧平衡阀油路，压力油流经右侧平衡阀和单向阀去往升降缸有杆腔后位于左侧平衡阀回油路上的平衡阀发生泄漏，即该阀阀芯右端的先导油发生泄漏、压力降低，不能克服平衡阀阀芯左侧弹簧作用力，使阀芯左移从而打开回油通道。洗刨鼓转子升降缸活塞无杆腔的液压油无法排岀，活塞不能向上移动，使铁刨鼓转子不能提升。

The mechanism of the fault is as follows: when the iron planer drum is operated to lift, the reversing valve directs the pressure oil into the oil circuit of the right balance valve, and the pressure oil flows through the right balance valve and the check valve to the rod chamber of the lifting cylinder. After that, the balance valve on the return oil circuit of the left balance valve leaks, that is, the pilot oil at the right end of the valve core leaks, and the pressure decreases, which cannot overcome the force of the left spring of the balance valve core, so that the valve core moves left to open the oil return channel. The hydraulic oil in the rod cavity of the lifting cylinder piston of the planer drum rotor cannot be discharged, and the piston cannot move upward, so that the planer drum rotor cannot be lifted.

检查故障前，须研究液压系统资料，在掌握液压系统回路及每个液压阀的工作原理的基础上，再进行具体的液压零部件的拆检判断，才能快速精准的解决问题。有关内容就来我们网站咨询！

Before checking the fault, it is necessary to study the data of the hydraulic system, and on the basis of mastering the working principle of the hydraulic system circuit and each hydraulic valve, carry out the disassembly and inspection judgment of the specific hydraulic components, so as to solve the problem quickly and accurately. Please visit our website for relevant content consulting service