China hydraulic pump manufacturers,
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High-pressure pump test-bed system may be implemented now conventional fuel injection system function can not be completed, its strengths are:
1, high-pressure fuel injection pump test pressure Taichung flexible adjustable for different conditions can determine the best pressure required eruption, and then optimize the diesel engine induction function.
2, can alone at once flexible injection timing control, high pressure eruption cooperation (120MPa ~ 200MPa), NOx and particulates can be controlled together (PM) in a smaller value, to the satisfaction emission requirements.
3, the flexible control injection rate changes, complete ideal fuel injection law, simply complete the pre-eruption and repeated eruptions, can decrease diesel NOx, while ensuring excellent power and economy.
4, the solenoid valve control fuel injection, high precision of its control, the high pressure does not appear bubbles and the appearance of residual pressure to zero, and therefore within the operating range of diesel engines, fuel injection cycle a small amount of change, the cylinder oil is not uniformity can be improved, then reduce the vibration and decrease emissions of diesel engines.
How to control the flow of piston:
?(L) improvement of the plunger system planning. After repeatedly proved that the final choice of the leading full-load sensing priority valve and plunger steering mode, in accordance with the new system can shift demand to assign traffic priority, regardless of load size, steering wheel speed bump can ensure adequate supply, and the rest Some can all work equipment supply circuit use, because the steering circuit and eliminate excessive oil caused by power loss, the progress of the system power down the job pressure piston pump.
?(2) optimization of planning boom cylinder and piston shape, decrease system work pressure. After optimization, the boom cylinder selection specification series 80/4. Piston displacement by the 10ml / r progress as 14ml / r, the system set pressure of 14MPa, to meet the boom cylinder lifting force and speed requirements.
?(3) In the application process should also pay attention to the use and protection of loaders accurate timing to increase or replac the hydraulic oil, the oil adhere to cleanliness, strengthen and protect normal view.
?Piston pump is used to a high pressure water flow, so that would have no impact to the water has a strong impact, the central portion of the high pressure water jet equipment. Due to the high operating efficiency of the piston pump, and the use of long life, so piston, the piston pump is the most common.
????Piston pump piston pump water capacity depends on the operating speed, it is necessary to pump the same amount of water into and out of. Piston pump water flow parameters are stable, that is, whether the device is not the same eruption under pressure out of the water flow is constant, and therefore, if the nozzle or a high pressure tube obstruction at presentation, could result in excessive pressure piston pump. Therefore, it is necessary within the device system equipped with pressure relief valve and the like equipment.
????Piston pump is through a fixed seal member, a piston moves back and forth. By reciprocating movement of the piston pump so that the pump chamber volume work cycle changes, complete suction and discharge liquid. The piston seal is mounted on the plunger, through a lubricated cylinder wall. It is mainly the use of the plunger reciprocates in the pump cylinder, the plunger and the pump wall forming volume changes, repeating suction and discharge of liquid and increase its pressure pumps. Piston pumps usually have a very good pre-use features, the advantage of having a rated pressure, compact structure, high efficiency and flow conditioning facilitation, but its drawback is not running excessive pressure, the use of life expectancy is shorter.
????Most likely cause of the malfunction equipment is usually not due to the onset of the pump, the pump is usually caused by problems of wear