The normal operation of the full-automatic mixer truck is completed by the drive of the hydraulic system, and the hydraulic pump and hydraulic motor are also very key components of the hydraulic system, especially the hydraulic pump. The following small series will introduce the precautions for the use of its hydraulic pump.
Before use, make sure whether the hydraulic pump is installed in place, whether the screws are tightened, and whether the coupling installation meets the requirements. Then check whether the pump body is filled with hydraulic oil conforming to the label. Check again whether the steering of the pump is consistent with the oil inlet and outlet, and whether the safety valve of the hydraulic system is adjusted to the specified pressure value.
When using the hydraulic pump of the full-automatic mixer truck, it is not allowed to start at full speed. The continuous no-load operation can be carried out only after the prime mover switch is jogged several times under the unloading state of the system. The purpose is to eliminate the air in the pipeline as much as possible. After no-load operation for 1-2min, there shall be no abnormal phenomenon, and then gradually load. During the loading process, there shall be no abnormal vibration, noise and leakage. Otherwise, stop the machine immediately for inspection and analysis and troubleshooting.
Pay attention to changing the hydraulic oil after long-term use, so as to ensure that the oil pump is in good working condition.
Precautions for use of hydraulic pump of automatic mixer truck:
① When the hydraulic pump is started, it shall be inched for several times. After the oil flow direction and sound are normal, it shall be operated under low pressure for 5-10min and then put into normal operation. Before starting the plunger pump, it is necessary to fill the pump with clean working oil through the oil drain port on the casing.
② The viscosity of oil changes with the influence of temperature, and the viscosity decreases with the increase of oil temperature. Therefore, the oil temperature is required to be kept below 60 ℃. In order to enable the hydraulic pump to work stably under different operating temperatures, the selected oil shall have the oil temperature characteristics with little influence of temperature change, as well as better chemical stability and anti foam performance. L-hm32 or l-hm46 (gb11118.1-94) anti-wear hydraulic oil is recommended.
③ The oil shall be clean and shall not be mixed with mechanical impurities and corrosive substances. The hydraulic system without filter device on the oil suction pipeline shall be filtered by the oil filter truck (the filtering accuracy is less than 25 μ m) Add oil to the oil tank.
④ The high pressure and high rotation speed of the hydraulic pump refer to the allowable peak value in a short time during use. Long term use shall be avoided, otherwise the service life of the hydraulic pump will be affected.
⑤ The normal working oil temperature of the hydraulic pump is 15 ~ 65 ℃, and the high temperature on the pump shell is generally 10 ~ 20 ℃ higher than the oil temperature at the pump inlet in the oil tank. When the oil temperature in the oil tank reaches 65 ℃, the high temperature on the pump shell does not exceed 75 ~ 85 ℃.
The above are the precautions for the use of the hydraulic pump of the automatic mixer truck. I hope you can learn to use the hydraulic pump correctly in the future to avoid unnecessary consequences. For more information, please visit our website http://zhaoyanfilter.com Consult and understand.