2202G1JE-DA-M-N_2010.01.
7 Related Document
Reciprocating Compressor M Series
7.4 Vibration and Sound Data
7-15
7.4 Vibration and Sound Data
7.4.1 Vibration
Standard Value for Vibration/Applied
The standard value of vibration can be applied when evaluating the vibration of the reciprocating compressor
installed in the unit.
Upon the rated rotation speed of the compressor, note that this standard is based on the assumption that the frames and the
piping are not resonated.
Compressor:
Applies to any of the up/down, right/left, and axial directions of the area around the bearing of the opposite side
of load side (oil pump).
Standard Value for Vibration Speed
The vibration severity is defined as the actual value of the vibration speed (mm/s rms).
It is classified based on the rated output value of the motor connected to the compressor.
Applies to belt-driven and direct-driven motors.
When indicating the vibration severity by displacement (D: µm P-P), calculate using the following
conversion equation.
D= 30000 ×
2 / (
π
N)•Vrms
(N: rotation speed rpm, Vrms: vibration severity of the vibration speed mm/s rms)
If the value is within the zone of A or B, there is no problem.
If the value is within the zone of C, related workers must discuss and determine an appropriate
response.
If the value is within the zone of D, stop the operation immediately and investigate.
Table 7-4 Standard value of vibration velocity (mm/s rms)
A: Great, B: Good, C: Attention, D: Not applicable
Range of Motor Rated Output
Range of vibration severity
Retained base
Vibration Absorbing base
Category
Vibration Speed
RMS Value
(mm/s rms)
Below
50 kW
50 kW
—
100 kW
100 kW
or over
Below
50 kW
50 kW
—
100 kW
100 kW
or over
1.1 1.12
1.8 1.78
2.8 2.82
4.5 4.46
A/B
7.1 7.07
A/B A/B
11 11.2
C
A/B A/B
18 17.8
C C
A/B
28 28.2
C C
45 44.6
C
71 70.7
D
D
D
D
D
D
