REXROTH A7VO160DR/63R-VPB01 Hydraulic Piston Pump

Principle of operation.
Variable displacement pumps are pumps with variable displacement. Variable displacement pumps can be single-acting vane pumps, radial piston pumps or axial piston pumps, widely used in metallurgy, mining, construction machinery, ships, civil aviation ground equipment and other hydraulic transmission fields. Variable displacement pump radial piston pumps including piston eccentric and shaft eccentric, axial piston type including swash plate and swashplate type.
A bi-directional variable pump is a pump that, with the direction of rotation of the prime mover unchanged, changes the displacement by changing the variable mechanism such as the direction of inclination of the swash plate of an axial piston pump or the compression ratio.
An axial piston pump operates by utilizing the change in volume generated by the reciprocating motion of a plunger parallel to the drive shaft in the plunger bore. Because the plunger and the plunger hole are round parts, processing can achieve a high℃of accuracy with, so high volumetric efficiency, smooth operation, good flow uniformity, low noise, high working pressure, etc., but the more sensitive to the pollution of the hydraulic oil, the structure is more complex, the cost is higher!

Scope of application.
Variable pump to realize the injection molding machine hydraulic system from valve control to pump control of the transformation, so that the conventional throttle speed control system into a proportional speed control system, the whole machine control performance indicators have new improvements and enhancements.

Advantages.
1. For the same power machine, the injection speed can be increased by more than 25%, which is more suitable for thin-wall precision injection requirements. Due to the ordinary PQ system power calculation to keep the pressure state as a standard, proportional variable pump system in this action when the power consumption is very low, so the oil pump displacement can be increased by more than 25%.
2. Reduced system heat, hydraulic components to extend the service life. Proportional variable system almost no throttling, overflow loss, system operation heat is greatly reduced. Not only can save the consumption of cooling water, low oil temperature so that the life of sealing components greatly improved.
3. Energy consumption is reduced and system efficiency is improved.
4. The control of numerical control proportional back pressure can be realized, and the plasticizing effect is improved.
5. Hydraulic system pollution level is reduced, the system failure is significantly reduced, the stability of the movement is greatly improved, the hydraulic oil use time than the conventional system to extend more than 3 years.
Proportional variable pump system has good self-adaptability, its output pressure and flow can be consistent with the load demand, to solve the throttle speed control system of the flow does not adapt to the pressure does not adapt to the problem, the energy loss is greatly reduced, the system efficiency is improved, energy saving effect is very obvious, compared with the ordinary quantitative pump + PQ proportional valve system, can save 25 ~ 45% of the power!