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China hydraulic pump manufacturers,
Removing either a cylinder pressure tubing connected to the high-pressure pump outlet valve, the high pressure pump and into the pipeline system filled with fuel. Slow disk drive, when the oil began to write down the flywheel transient fluctuation scale, that is, the cylinder fuel supply time, repeated (at least three times) and averaged, that is the cylinder injection timing. That method of measuring fuel supply advance angle.
?????Photopheresis. Large end section back to the hole injection pump, if the sleeve motivated, back hole of equal height, remove the screws on the corresponding pump. With the light back to the hole and screw hole cover moments, remember the oil supply from the moment of the flywheel scale.
?????Notation. Some of the high-pressure pumps in the pump and the pump column are engraved with a horizontal line, plate car, as long as the two lines is the oil agreement in time, read from the flywheel dial.
?Improve fuel pressure of the injection to achieve the best atomization, high-pressure pump main purpose is as a jack, upsetting head, pinch the power source machine, embroider machine hydraulics.
????High-pressure pump installation sequence: In the high-pressure pump installed in the process, in order to avoid the debris to fall into the machine, all the units should cover the perforations. The crew on the buried anchor bolts, based on the base and intermediate base with a pair of wedge pad for correction. Proofreading pump shaft and motor shaft concentricity, on the road linking the outer circumference of the shaft, you can have 0.1 mm deviation; two coupling plane gap should ensure that in 2 to 4 mm, (a small pump to take a small value) gap to uniform, tolerance 0.3 mm. After the connected piping and determine the motor direction of rotation, connect the coupling, and aromatic again continue proofreading concentric shafts. After the unit trial run 2 to 3 hours, do a final check, if no adverse phenomenon, is considered qualified to install. In the commissioning process, check the bearing temperature and vibration are as follows: Loosen the coupling large, with a horizontal instrument were placed on the electric oil pump shaft and the base, by adjusting the wedge pad, correction unit level, tighten the bolt appropriate to Anti-around. In order to prevent pipeline debris into the pump, to the newly installed pipeline should be installed in the pump glue filter, the effective cross-section should be greater than 2 to 3 times the suction pipe section.
??The main component is a piston pump bearing, if the bearing clearance occurs, you can not ensure normal internal pump three pairs of friction pair gap, but also the destruction of each friction pair hydrostatic bearing oil film thickness, so that the piston pump bearing reduced service life. According to information provided by the manufacturer of the pump, even bearing service life of 10000h, above the top of this he will need to exchange a new port value.
Dismantled bearings, no professional testing equipment is unable to detect the bearing clearance, can only adopt the visual, such as roller scratched or discolored appearance of situation, it is necessary to replace.
