Used Sao 23-3802 hydraulic pump

Sao used 23-3802 hydraulic pump hydraulic distributor knowledge: working principle of radial piston hydraulic motor, when pressure oil enters the oil with the fixed shaft 4 through the window at the bottom of cylinder plunger, the plunger extends outward, tightly against the inner wall of the stator, the stator and the cylinder has a eccentricity.

In the contact between the plunger and stator, the reaction force of the stator to the plunger is. Force can be divided into two components. When the oil pressure at the bottom of the plunger is p, the diameter of the plunger is D, and the angle between the force and the angle is X, the force generates a torque to the cylinder body, so that the cylinder rotates. The cylinder block outputs the torque and speed outwards through the transmission shaft connected with the end face.

Generally, the hydraulic system fails. The reason may be:

Insufficient thrust of hopper cylinder. The reason is the leakage of hydraulic oil in the hopper cylinder. First of all, the piston sealing ring should be inspected, the aging or wear of the sealing ring will cause insufficient thrust of the hopper cylinder, if necessary, it should be replaced; if there is no problem in the sealing ring, it is necessary to check the gap between the cylinder and piston, and the cylinder wear can make the gap too large, so that the cylinder thrust of the cylinder becomes smaller.

If there is no hydraulic oil in the hopper, it is possible that the overflow valve fails to make it open for a long time, resulting in no oil flow into the hopper cylinder. At this point, it is necessary to check whether there is dirt entering the overflow valve.

Insufficient supply pressure of hydraulic pump. Is generally caused by the leakage of hydraulic pump, hydraulic pump wear itself if the inner leakage, if the seal wear is leaked, when necessary, should be the timely replacement of wear parts; in addition, the hydraulic pump does not absorb the oil caused by hydraulic oil is too small or the hydraulic pump oil filter plug, can also reduce fuel pressure at the pump is running a large noise, so according to the meshing gear pump sound is normal to judge.

In addition, due to the control of the left and right hopper closed and control the hydraulic pump lifting plate for the same pump, if the hydraulic system causes the left and right hopper can not be disturbed, the ironing plate will also have the corresponding failure. Therefore, if the hopper and ironing plate fail simultaneously, the hydraulic pump fault should be considered first.