Pump Noise (Plus) – PCV of A10VSO/32

Previously on iHydrostatics N16, more secrets of PCFV technology were disclosed, based on the investigation, we can clearly see that this technique has triggered great interest to the research institutes, further study on PCFV has spread out. If you want to review current research on this technique, please reply N16 in Wechat iHydrostatics to get the detailed information. Any questions are always welcomed, iEditor encourages you to leave your comments in iHydrostatics QQ Group: 426372753.



For pump noise topic, iEditor has talked much more, but Rexroth A10VSO/32 has caught my eyes again. In this episode, iEditor would like to share some information about PCV (same as PCFV) applied in A10VSO/32 pump, we will see how Rexroth utilizes this technique to get better noise performance.
1Get to Know A10VSO/32
A10VSO/32 pump is specially designed for industrial hydraulics with reduced noise, improved efficiency, increased reliability and high flexibility.
We can see there is much difference from Series 31 pump with the different design of pump housing.
As we know, pump noise radiates into the air by pump housing, so the stiffness of housing significantly influence the structure noise level. Optimized housing design can help to reduce thiskind of noise level. Modal analysis of Series 32 pump housing shows that the positive result from this optimized design.
Meanwhile, some other special designs also help increase the stiffness of series 32 pump to reach a sound performance and noise level.

2PCV of A10VSO/32PCV (Pre-Compression Volume) technique has also been applied to A10VSO/32 as an optional configuration integrated into port plate.





Pre-Compression volume can cut pressure pulsation 50% maximum.


This configuration is perfectly for industrial applications, like Plastic Injection Moulding Machine, Presses and Power Packs.



The working process of A10VSO/32 PCV is quite similar to Parker’s. Here is a brief summary to illustrate the whole process.






3Test VerificationTesting Conditions:
· Speed: 1500 rpm; 1800 rpm
· Displacement: Vgmax; Vgmin
Vary load pressure at different combination of speed and displacement, record the noise level.


Testing Results:
– Vgmax @ 1500 rpm


– Vgmin @ 1500 rpm



– Vgmax @ 1800 rpm



– Vgmin @ 1800 rpm





Testing Summary:
– Comparing the testing results, we can see that PCV does not have equal effect under all working conditions on A10VSO/32 pump
– Under max. displacement and higher speed, PCV has more positive influence on the pump noise




REFERENCES

[1]. Rexroth A10VSO/32 Technical Manual.

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