After the Hydraulic Vane Pumps is damaged, it must first check the appearance, internal and related phenomena. When the following conditions occur, its corresponding cause can be determined:
1. Bearing damage: When the pump core is severely damaged in many places, as long as the bearing is damaged, it is considered to be caused by improper installation. (Because the bearing is damaged first, when the bearing is damaged, the shaft will move, telling that other parts will be damaged under swing)
2. There is rust in the liner. When the pump core is seriously damaged in many places, as long as there are rust marks. The list is considered to be caused by water in the oil (because the oil will never rust when the oil is normal)
3. Poor oil quality: When the pump core is severely damaged, as long as there are stolen objects, foreign objects in the oil, or the oil has turned black. All are considered to be caused by dirty oil and bad oil quality.
4. Pump shaft fracture: should try to check the fracture location. If the material or heat treatment is not good, the damage point should be the weakest link, that is, the smallest diameter or spline. Improper installation, too much coaxiality deviation.
5. When inspecting the material, the composition, metallographic structure, hardness, etc. of the material should be inspected. Colleagues should also analyze the sequence and causality of the damaged parts, and finally find out the cause.
The following items are quality issues in product manufacturing:
1. High noise: As long as other reasons are eliminated, it should be a quality problem.
2. Scratching of parts: The scratches of the rotor and the side plate are symmetrical, and the phenomenon of diagonal scratches should be a quality problem.
3. Shaft fracture: When the fracture is at the weakest place, and the other parts are intact at the same time, it is the quality of the shaft.
4. Rotor break: No other parts are broken, only the rotor is broken, which is a quality problem.
5. Blade break: No other parts are broken, only the blade is broken, which is a quality problem.
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