查看混凝土攪拌車(chē)液壓泵是否能輸出液壓油。如果是新的液壓泵,無(wú)液壓油輸出,可能是泵體有鑄造缺陷(縮孔、砂眼等),使吸油腔和壓油腔相通,失去壓油能力,應及時(shí)找廠(chǎng)家更換。若不是新的液壓泵,無(wú)液壓油輸出,可能是泵的轉向不對,零件磨損嚴重或損壞,及時(shí)更換。
Check whether the hydraulic pump of concrete mixer truck can output hydraulic oil. If it is a new hydraulic pump without hydraulic oil output, it may be that the pump body has casting defects (shrinkage cavity, sand hole, etc.), which connects the oil suction chamber and oil pressure chamber and loses the oil pressure capacity. It should be replaced by the manufacturer in time. If it is not a new hydraulic pump and there is no hydraulic oil output, it may be that the steering of the pump is wrong, and the parts are seriously worn or damaged. Replace them in time.
若混凝土攪拌車(chē)液壓泵有油液輸出,查看溢流閥工作是否正常。若不正常,則可能是壓力油路中的某個(gè)閥有污物或其他原因卡住,處于回油位置,致使壓力油路與溢流回路短路,也可能是管接頭松脫,或處于壓力油路中的某些閥泄漏嚴重,或液壓缸、液壓馬達的密封損壞,嚴重泄漏。排除方法是拆開(kāi)有關(guān)閥進(jìn)行清洗,檢查密封間隙的大小及各種密封裝置,密封裝置損壞應更換。
If the hydraulic pump of concrete mixer truck has oil output, check whether the overflow valve works normally. If it is abnormal, it may be that a valve in the pressure oil circuit is stuck due to dirt or other reasons and is in the oil return position, resulting in a short circuit between the pressure oil circuit and the overflow circuit, or the pipe joint is loose, or some valves in the pressure oil circuit leak seriously, or the seals of the hydraulic cylinder and hydraulic motor are damaged and leak seriously. The troubleshooting method is to disassemble the relevant valves for cleaning, check the size of the sealing gap and various sealing devices, and replace the damaged sealing devices.
若水泥小型混凝土攪拌車(chē)的液壓泵輸出流量隨壓力升高而顯著(zhù)減小,且壓力達不到規定值,則是由于液壓泵磨損后間隙變大所致。排除方法是測定液壓泵的容積效率,即可確定該泵是否能繼續使用,對磨損嚴重的零件,應進(jìn)行修配或更換。
If the output flow of the hydraulic pump of the small cement concrete mixer decreases significantly with the increase of pressure, and the pressure cannot reach the specified value, it is due to the larger clearance after the hydraulic pump is worn. The elimination method is to measure the volumetric efficiency of the hydraulic pump to determine whether the pump can continue to be used. The parts with serious wear should be repaired or replaced.
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