Oil filter equippedSeveral common faults of axial piston pum

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Oil filter equippedSeveral common faults of axial piston pum

Messagede yanyan » Mar 11 Aoû 2020 10:57

Axial piston pump in the long after the work, or improper operation and maintenance, often occur fault, hengyu hydraulic for you to briefly introduce a few common axial piston pump fault and cause analysis.

1, the output flow is not enough or no oil: high suction resistance or suction air; Poor axial force; Return spring or return disk damaged; There is dirt between the plate and the cylinder; Damage to plunger or plunger hole; The variable mechanism is not in the right position; Oil temperature is too high; Poor assembly.

2. No pressure increase or no pressure increase at all: the above mentioned flow insufficiency may cause; The variable mechanism is not well adjusted; Other reasons.

3, pump noise, pressure fluctuations: inhalation of air; Variable piston motion is not flexible; Triangle groove Angle is too small; The stiffness of variable mechanism is small; Sliding boots and ball head cooperate loose; Large leakage of variable mechanism.

4, pump heating, oil temperature rise is too high: plunger and plunger hole, valve plate and cylinder joint surface wear, leakage is large; The motion pair in the pump is severely worn and pulled, and the mechanical efficiency is low. Small eccentric pump or low working pressure; Large oil viscosity, small tank volume; Bearing wear and transmission strain.

5. Serious oil leakage (internal and external leakage) in the leaking pipe: the cylinder body and the distribution plate, the plunger and the plunger hole are worn; Variable piston wear, resulting in leakage; Joint seal damaged; The oil seal leaks oil.

6, the pump can not turn: the plunger stuck; Slippery boots fall off; The ball head is broken; Return disk rupture; The cylinder body is sintered with the plate;

7. Failure of variable mechanism: The circular surface of variable head bearing bush is seriously worn; Control oil channel blockage; The variable Viseca is dead; Control spool spring damage; Variable mechanism leakage

8. The fitting surface of the distribution plate and the cylinder body is worn or burned out: the oil is dirty; No oil in the pump when starting; The distributing disc is not hard enough; The cylinder body is of poor quality; High temperature and high pressure deformation of distribution plate; The coaxiality difference between the supporting hole in the pump shell and the transmission shaft; The fit clearance between cylinder block and bearing is too large; Transmission shaft spline mating clearance is too small; The distribution surface of the cylinder block is not perpendicular to the rotation center; Drive shaft bending; Oil trapped in the transition zone between high and low pressure of the distribution plate is serious.

9. Wear or burn out of slipper and swash plate fitting surface: oil pollution; Piston or slipper damping hole plug; Swash plate hardness or machining accuracy is not enough; The slipper shoulder thickness is not consistent; The static bearing precision of slipper surface is not enough; Plunger ball head plane is small
with filter element
The oil filter is equipped with automatic detection function of filter element pollution degree


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yanyan
 
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