Page 11 - Linde - HPR-02 Self regulating pump for open loop operation

Noise reduction. SPU silencer

SPU silencer function HPR-02 with SPU
>> Reduction of pressure pulsations over the entire
operating range
>> Reduction of noise emission by approx. 50 %
(equals approx. 3 dB(A))
>> Reduction of volume flow fluctuations
>> No impairment of efficiency
>> Ready for use immediately, no maintenance required
>> Simple and rugged design
>> Minimum increase in weight and volume

The following diagrams illustrate the immediate effect of pulsation level reduction via SPU on the sound pressure level and there-
fore the perceived noise emission.

Comparison of sound pressure levels for a HPR 75-02 pump with and without SPU

at a speed of 2500 rpm
at an operating pressure of 350 bar n bei einer Drehzahl von 2500 U/min
bei einem eriebruck von 50 ba
n
challruckeel in 2 chrie Noise Level in 2 dB(A) steps challruckeel in 2 chrie Noise Level in 2 dB(A) steps

mi U
mi U
with SPU
SPU
1000 1500 2000 2500 50 100 150 200 250 with
Speed [rpm]
Drehzahl [U/min] Pressure [bar]
Druck [bar]
Comparison of resulting noise emission
Shown in 2 dB(A) steps over a typical diesel engine operating speed range.

Kabinengeräusch Außengeräusch
Cabin Noise Outside Noise
Geräusch in 2dB(A) Schritten
Noise Level in 2 dB(A) steps

artblich
conventional

it S
with SPU
Dieseldrehzahl (typischer Betriebsbereich)
Diesel speed (typical operating range)

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