Axial piston pump axial piston pump is a piston or plunger reciprocating motion direction parallel to the axis of plunger pump and cylinder center. Axial piston pump is the use of parallel to the shaft of the plunger in the plunger hole reciprocating motion generated by the volume change for work. High volumetric efficiency, stable operation, good flow uniformity, low noise, high working pressure, but the pollution of hydraulic oil is sensitive, complicated structure and high cost. Direct axis swashplate plunger pump plunger pump can be divided into direct axis swashplate pressure oil supply type of imbibition oil type two kinds. Pressure oil supply type hydraulic pump pressure tank in most used, a hydraulic pump itself there is oil supplement offer hydraulic pump inlet pressure oil pump. Imbibition oil type hydraulic pump self-priming capacity is very strong, without external force oil supply. On hydraulic pressure oil tank, after each start the machine, such as hydraulic stains box to use pneumatic, to operate machinery. Radial piston pump radial piston pump can be divided into the valve with flow and axial flow two kinds big. Valve with radial piston pump shortcomings of high failure rate and low efficiency. Because of the characteristic of the radial gas booster pump structure, axial radial piston pump with flow axial plunger pump impact resistance, long service life, high control precision. Hydraulic piston pump hydraulic piston pump by pressure of the hydraulic oil tank, after each start the machine, such as hydraulic stains box to use pneumatic, to operate machinery. Plunger pump can be divided into direct axis swashplate pressure oil supply type of imbibition oil type two kinds. Pressure oil supply type hydraulic pump pressure tank in most used, plunger pump too hot because there are two reasons, one is machine friction heat production. Because the campaign appearance in dry friction or half dry friction condition, friction between moving parts get hot. The second is liquid friction heat production. High pressure oil leaked through loopholes to low pressure chamber, a large number of hydraulic energy loss into heat energy. To is accurate selection of the clearance between moving parts, fuel tank volume and cooler, prevent excessive heat pump and the sign of the oil temperature is too high. Else, return oil filter blockage caused by oil back pressure is too high, can also cause the oil temperature is too high and the pump body is overheating. Plunger pump leak reason has the following important reasons: ( 1) Main shaft oil seal damage or shaft has defects, scratches; ( 2) Large internal leakage and oil seal in the pressure increase, and the oil seal damage or out; ( 3) Drain pipe to go too long, make the seal leak; ( 4) External loose tubing, tube pump include mutilate, seal aging or occur crack; ( 5) Variable modulation mechanism is loose, the seal damage; ( 6) Cast iron pump shell has sand holes or bad welding. Keywords: oil pump power plant, the axial plunger pump manufacturers, variable plunger pump manufacturers
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