Prolonging the service life of the hydraulic piston pump use and maintenance method

the efficiency of the hydraulic system mainly depends on the volumetric efficiency of hydraulic pump, when volumetric efficiency descend to %, the need for routine maintenance, replacement of bearing and aging seals, to replace or repair beyond the friction pair of fit clearance, make its performance restoration.
, hydraulic 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. Pressure of the hydraulic oil tank, after each start the machine, after must wait for hydraulic stains box to use pneumatic to operate machinery. If less than when the pressure of the hydraulic oil tank has served in the machine, can slip within the hydraulic pump on with a whip, pulled off phenomenon will cause return plate in the pump body and linking piece of abnormal wear. Replacement pump plunger pump oil, using h, operator needs to check - the plunger pump Time, check that the hydraulic pump running sound is normal. When the hydraulic cylinder speed drop or stuffy car is found, it should be the disintegration of oil pump inspection, check the wheel rim for scratch phenomenon, the internal gear pump clearance is too large.
, for imbibition oil plunger pump, hydraulic oil within the tank oil shall not be lower than the lower limit, to maintain a sufficient number of hydraulic oil. The higher the purity of the hydraulic oil, the longer service life of the hydraulic pump.
, the most important components of the hydraulic pump plunger pump bearing is bearing, if the bearing clearance, not guarantee hydraulic pump internal three normal clearance of friction pair, at the same time also damage the friction pair of hydrostatic bearing oil film thickness, reduce the service life of the plunger pump bearing. The information provided according to the hydraulic pump factory, bearing an average service life of h, more than this value will need to replace new mouth. Removed the bearing, no professional testing instrument is unable to detect the bearing clearance, can only use visual, if discover to there is scratches or roller surface discoloration, it must be replaced. Should be paid attention to when change the bearing, the English letters and model of the original bearing, plunger pump bearings are mostly adopted the load bearing capacity, had better buy the original factory, the specifications of the products, if change another brand, should consult a look-up table to bearing experienced personnel exchange, the purpose is to keep the bearing level of accuracy and load capacity.
, three on the friction pair of inspection and repair: plunger rod and cylinder hole according to the plunger pump parts to replace standard, when parts of various clearance error, according to the following method to repair:
( Set of copper set of cylinder body, can adopt the method of replacement of copper set of repair. First put a set of piston rod diameter dressing to uniform size, with more than # sandpaper polishing outer diameter. Three methods: (to install copper of cylinder body A cylinder heating hot charging or copper set of cold extrusion, interference assembly; ( B have loctite adhesive assembly, this method requires copper coat outside diameter surface of groove; ( C cylinder hole tapping, processing copper sleeve diameter thread, tuliey Thai rubber after screwing in assembly.
( Melt combining ways of cylinder body and copper tubes of repair method is as follows: ( Adopting grinding rods, a manual or mechanical lapping repair cylinder hole; ( B using coordinate boring machine, cylinder boring; ( C USES the reamer repair cylinder body hole.
( The surface engineering technique, methods are as follows: ( A plating technology: in the plunger surface a layer of hard chromium plating; ( B the brush plating technology: in the plunger surface brush plating wear-resistant materials; ( C thermal spraying or arc spray or electric spray: spraying high carbon martensite wear-resistant materials; ( D laser deposition: in the plunger surface deposition of high hardness, wear resistant alloy powder.