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

Treatment measures for leakage of hydraulic pump of precision four-column hydraulic cutting machine
What are the treatment measures for leakage of hydraulic pump of precision four-column cutting machine? Let's take a look at the explanation of cutting machine manufacturers.
Leakage of hydraulic cutting machine pressure pump refers to leakage of hydraulic oil. In the working process, almost all hydraulic pumps will have similar problems. Its appearance will stop the operation of mechanical equipment immediately, but it will reduce the volume of hydraulic pump, reduce the working efficiency, limit the increase of rated pressure of hydraulic pump.

The main reason for the leakage of the cutting machine: Since most of the relative moving parts in the hydraulic pump adopt the gap sealing method, when the hydraulic pump is working, the high-pressure oil in the oil pressure chamber must flow through this gap to the oil suction chamber other low-pressure places, thus forming a leak. Therefore, controlling reducing leakage is one of the basic conditions to ensure the normal operation of the hydraulic pump. The condition for the leakage of the hydraulic pump is the existence of gap pressure difference, its leakage is proportional to the cube of the gap value the first power of the pressure difference. The analysis of the leakage of the pump is mainly based on the size of the sealing gap, the height of the gap pressure difference, whether the movement increases the leakage.
Since the machining accuracy of the annular gap between the plunger the cylinder hole is easy to control, other gaps are easy to compensate, the volumetric efficiency rated pressure of the plunger pump are relatively high. In the vane pump, the main leakage gap is the end face gap between the rotor the distribution plate, followed by the gap between the blade the rotor blade groove, the gap between the top of the blade the inner ring of the stator. In order to reduce leakage, some medium high pressure double-acting vane pumps design the distribution plate as a floating distribution plate to achieve automatic compensation of the end face gap. The main leakage gap of the cutting machine plunger pump is the annular gap between the plunger the cylinder hole, followed by the end face gap between the axial plunger pump cylinder the distribution plate, the plane gap between the sliding shoe the inclined plate. For radial piston pumps, in addition to the annular gap between the plunger the cylinder hole, there is also a radial gap between the cylinder the distribution shaft, a gap between the sliding shoe the inner ring of the stator.
Clearance, meshing clearance between two meshing gear teeth. The end face clearance of medium high pressure gear pumps is compensated by an automatic floating compensation mechanism. For external meshing gear pumps, the main gap is the end face clearance between the gear end face the front rear pump covers the left right side plates, followed by the radial clearance between the tooth top the inner circle of the pump body.