Details how to operate the hydraulic pump and his maintenance precautions

Details how to operate the hydraulic pump and his maintenance precautions 1, to ensure the normal state of the hydraulic oil pump system The problem of hydraulic oil has always been the culprit is the culprit leading to hydraulic system failure, due to space limitations, not repeat them here , Only some of the individual sample questions to make some affirmations. 2, the viscosity of oil should be appropriate, such as the ZB-type pump proposed the use of viscosity with the oil temperature changes small hydraulic oil, the viscosity of the scale within 20 ~ 100cst, the scene temperature above 15 ℃, the proposed use of thick 40-3, 30 No. 30 mechanical oil, machine oil No. 30, the scene temperature below 25 ℃, the proposed use of YH-10 aviation hydraulic oil; domestic α and CB-4 gear pump, YB-type vane pump recommended the 20th machine oil. The connection of oil and clean, the connection must be the oil filter accuracy 1), the axial piston pump end gap can take the initiative to compensate, the gap is small, thin oil film, oil filtration requirements of the highest. 2), sloping disc axial piston pump oil filter accuracy of 10 ~ 15μm. 3), solid impurities cause wear and tear, and the efficiency of the decline, leading to through-hole, variable bodies, parts, such as the infarction and jamming. 4) Once the hydraulic fluid is infected, it should be replaced in full and rinsed with clean oil. 4, the working oil temperature appropriate 1), individual working oil temperature should be 10 ~ 50 ℃, the maximum should be less than 65 ℃, some short-term should be less than 90 ℃. 2), low temperature should be light or no load to start until the oil temperature normal and then resume normal operation. Individual temperature below 10 ℃, should be no-load operation 20min above the ability to load: If the temperature below 0 ℃ or above 35 ℃, should be heated or cooled; start region or winter oil temperature should be raised above 15 ℃ Can be loaded; banned below -15 ℃ can be activated. Hydraulic oil pump work is strictly prohibited when the hot oil into the hot components, or hot oil filled into the cold components, in order to prevent the temperature is too large, expansion or shortening divergence and killed. In winter or in the icy area, if an electric heater is used to heat the oil in the tank, the pump and motor are still cold and easily stuck. 5, to protect the normal working conditions 1), the normal suction conditions of course, hydraulic pumps are positive displacement pumps, there is a certain self-priming capacity, but the internal sealing surface of mercury friction and more self-absorption capacity is limited, especially the internal pump flow channel complex , Individual sucking height (tank oil level to pump core) is low, about 12 ~ 50cm, while some mercury expressly does not promise self-priming, such as type ZB227, so it should consider its inhalation conditions as much as possible Inhalation resistance: 2), Suction hydraulic pipe shall not be installed filter, or negative suction or auxiliary pump oil supply; 3), it is best to make the tank above the suction pump, or auxiliary pump oil. Such as: ZB hydraulic pump (except ZB227 type) at an additional speed (1500r / min) below the turn, promised self-absorption, but this will lead to the content and the number of drops of about 5%, and will certainly affect its operating life, Individual manufacturers do not recommend this type of operating system; manufacturers are mostly recommended sub-pump oil, live by the pressure of about 0.7MPa. CY oil Mercury promises self-priming when operating at an extra speed. Oil sump height ≤500mm. When operating at maximum speed, and when the oil suction pipe is small, it promises to use the height of the flow column. The suction height is 300 ~ 500mm. Large, the hydraulic pump must be used for auxiliary mercury supply, supply pressure ≤ 0.4Mpa.