為印證相關判斷，這里我們對液壓回路及相關液壓閥進行了以下排查，下面冷再生機租賃廠家為您解答。

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.

檢查比例換向閥，發現該閥閥塊下面有4個圓形油道口，采取對各油道通入壓縮空氣的方法測試，以檢驗其閥芯密封性好壞。檢查結果表明，比例換向閥密封良好。

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.

檢查壓差閥和平衡閥閥座、閥芯是否有磨損以及密封件有無破損老化情況。在該回路中，只有壓差閥和平衡閥的閥體上帶有密封件，如其密封不好，會影響系統壓力。

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.

檢查發現，壓差閥和平衡閥外部金屬閥座及密封沒有明顯磨損及細小劃痕，平衡閥內部密封圈上有缺口及破損，由此確定問題在平衡閥。對平衡閥進行更換后，冷再生機可以在高溫環境中長期可靠運轉，沒有再出現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.

該故障產生的機理如下：當操縱鐵刨鼓提升時，換向閥將壓力油導入右側平衡閥油路，壓力油流經右側平衡閥和單向閥去往升降缸有桿腔后位于左側平衡閥回油路上的平衡閥發生泄漏，即該閥閥芯右端的先導油發生泄漏、壓力降低，不能克服平衡閥閥芯左側彈簧作用力，使閥芯左移從而打開回油通道。洗刨鼓轉子升降缸活塞無桿腔的液壓油無法排岀，活塞不能向上移動，使鐵刨鼓轉子不能提升。

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.

檢查故障前，須研究液壓系統資料，在掌握液壓系統回路及每個液壓閥的工作原理的基礎上，再進行具體的液壓零部件的拆檢判斷，才能快速精準的解決問題。有關內容就來我們網站http://lvuee.com咨詢！

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 http://lvuee.com consulting service