Treatment Measures For Leakage

- Dec 30, 2020-

Treatment measures for leakage of hydraulic pump of precision four-column cutting machine


What are the treatment measures for leakage of hydraulic pump of precision four-column cutting machine? Now let's take a look at the explanation of the cutting machine factory.


Hydraulic cutting machine pressure pump leakage, refers to the leakage of hydraulic oil, in the work of engineering, almost all hydraulic pumps will appear similar problems, it will not let the mechanical equipment immediately stop working, but will reduce the volume of hydraulic pump, reduce operating efficiency, and limit the increase of the rated pressure of hydraulic pump.


The main reason for the leakage of the cutting machine is that most of the relative moving parts in the hydraulic pump adopt the sealing way of gap sealing. When the hydraulic pump works, the high-pressure oil in the pressure chamber must flow through the gap to the oil suction chamber and other low-pressure places, thus forming the leakage. Therefore, the control of leakage, reduce leakage, is to ensure the normal operation of the hydraulic pump one of the basic conditions. The condition of hydraulic pump leakage is that there is a gap and pressure difference, and its leakage is directly proportional to the third square of the clearance value, and the first square of the pressure difference. Analysis of the pump leakage is mainly from the size of the seal clearance, clearance pressure difference and movement whether to increase the leakage of three aspects.


Because the plunger and cylinder hole ring clearance machining accuracy is easy to control, and other clearance easy to achieve compensation, so the plunger pump volume efficiency and rated pressure are higher. In the blade pump, the main leakage clearance is the end clearance between the rotor and the distribution plate, followed by the clearance between the blade and the rotor blade slot, and between the blade tip and the stator inner ring. In order to reduce the leakage of middle and high pressure double-acting vane pump, some design the distribution plate as floating distribution plate to realize the end face clearance automatic compensation. The main leakage clearance of the plunger pump of the cutting machine is the annular clearance between the plunger and the cylinder hole, followed by the end clearance between the axial plunger pump cylinder and the plate, and the plane clearance between the sliding shoe and the swash plate. For radial plunger pump, in addition to the annular clearance between the plunger and cylinder block hole, there is also the radial clearance between the cylinder block and the distribution axis, and the clearance between the sliding shoe and the stator inner ring.


The clearance between two meshing gears. The end clearance of middle and high pressure gear pump is compensated by automatic floating compensation mechanism. External meshing gear pump, its main clearance is the gear end face and before and after the pump cover or the right and left side plate between the end face clearance, then there is the radial between the tooth tip and the pump body circle.