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China hydraulic pump manufacturers,
Piston overhaul
(1) Check the plunger there is no scar and corrosion phenomenon, when necessary, should be replaced new.
(2) Check the plunger deputy with the situation. The plunger tip is inserted into the plunger comprising a tilt of about 60 °, if the plunger can slow the decline in its role as a good fit.
(3) Check the plunger seal deputy. Hold the plunger sleeve, two fingers to block the plunger tip and the side of the inlet. Pull the plunger with the other hand, feel a greater attraction, relax plunger is retracted immediately situ, indicating piston secondary seal is good, or to replac the piston pair.
(4) Check the oil pressure valve annulus vice is not worn or injuries have stepped phenomenon, when necessary, should be replaced.
(5) check out the situation with the deputy of the oil valve. Use your fingers to block the oil valve under the hole, with the other fingers to gently press down the valve when the valve finger from the upper end of time, it can automatically spring back into place, it indicated that the valve secondary seal is good, otherwise should replac the oil valve deputy.
(6) Check quite cylinder. Standard fuel pump body and the very cylinder gap between the 0 ~ 0.03mm, such as more than 0.2mm, it should replac the parts.
Gap (7) Check the plunger flange and the control sleeve between the grooves, should be 0.02 ~ 0.08mm, such as more than 0.12mm, you must replac the control units.
Electric pumps are providing pressurized fluid to the hydraulic drive a hydraulic components, is a type of pump. Electric hydraulic pump function is to power machine (such as an internal combustion engine and electric motor, etc.) of the mechanical energy is converted to pressure energy of the liquid. Output flow can be adjusted according to need is called a variable pump, flow can not be adjusted is called a metering pump. Electric hydraulic pump system often used gear pumps, piston pumps and pump three blades. Gear pumps: smaller, simpler structure, for the cleanliness of the oil is not critical, cheaper; however unbalanced shaft by force, badly worn, leaking large. Vane pumps: vane pump into a double-acting and single acting pumps. The pump flow evenly, smooth operation, low noise, operating pressure and volumetric efficiency is higher than a gear pump, the structure is more complex than the gear pump.
Use hydraulic tank
The important role of the hydraulic oil tank in the hydraulic system for the separation of oil, heat the oil contained in the air and eliminate foam. Choose to use the tank first thing to consider its capacity, general mobile equipment take 2 to 3 times the maximum pump flow rate, fixed equipment to take 3 to 4 times; Second, consider the oil tank when the system is all hydraulic oil tank may not extend below the minimum oil level when the oil level after retracting the cylinder must not exceed the maximum oil level; and finally consider the tank structure, the traditional fuel tank separator and precipitated dirt can not play the role
