EFRC (European Forum Reciprocating Compressor) Vibration Guideline

Guidelines for Vibraions in Reciprocating Compressor Systems

 

EFRC에서는 120rpm ~ 1800rpm 사이에서 운전되는 Reciprocating Compressor의 진동 기준치를 제시하고 있다. 본 규격에서 포함되는 Reciprocating Compressor의 종류는 다음과 같다.

 

- Horizontal, vertical, V-, W- and L-type compressor systems

- Constant and variable speed compressors

- Compressors driven by electric motors, gas and diesel engines, steam turbines with or without a gearbox, flexible or rigid coupling,

- Dry running and lubricated reciprocating compressors,

 

 

1. 진동 기준치

진동 기준치는 측정되는 진동 주파수에 따라 변위, 속도, 가속도 단위로 각각 평가하며, Reciprocating Compressor의 Datasheet에 명기된 운전 조건 중 가장 높게 진동이 측정되는 값을 본 규격의 진동 기준치와 비교한다. 

 

- 진동 변위 (Displacement): 2~10Hz

- 진동 속도 (Velocity): 10~200Hz

- 진동 가속도 (Acceleration): 200~1000Hz

 

진동 기준치가 제시되는 위치는 Reciprocating Compressor의 Foundation, Crankcase Frame, Cylinder, Pulsation Dampener, Piping System 등으로 세분화되어 있으며, 각 기준치 별로 아래와 같이 Zone을 구분할 수 있다.

 

 

[ Vibration Zone Grade ]

Zone	Range	Criteria	Description
A	≤A/B	Acceptable	Be considered acceptable for long-term operation
B	>A/B, ≤B/C
C	>B/C, ≤C/D	Marginal	To clarify if the compressor is suitable for long-term safe operation
D	>C/D	Unacceptable	Urgent correction or shutdown to be performed

 

 

[ Overall Constant Vibration Displacement Criteria ]

Compressor system part	r.m.s. vibration displacement values for horizontal compressors [mm]			r.m.s. vibration displacement values for vertical compressors [mm]
	Evaluation zone boundary			Evaluation zone boundary
	A/B	B/C	C/D	A/B	B/C	C/D
Foundation	0.032	0.048	0.072	0.032	0.048	0.072
Frame(top)	0.084	0.127	0.191	0.084	0.127	0.191
Cylinder(lateral)	0.139	0.207	0.310	0.170	0.255	0.382
Cylinder(rod)	0.170	0.255	0.382	0.139	0.207	0.310
Dampers	0.202	0.302	0.454	0.202	0.302	0.454
Piping	0.202	0.302	0.454	0.202	0.302	0.454

 

 

[ Overall Constant Vibration Velocity Criteria ]

Compressor system part	r.m.s. vibration velocity values for horizontal compressors [mm/s]			r.m.s. vibration velocity values for vertical compressors [mm/s]
	Evaluation zone boundary			Evaluation zone boundary
	A/B	B/C	C/D	A/B	B/C	C/D
Foundation	2.0	3.0	4.5	2.0	3.0	4.5
Frame(top)	5.3	8.0	12.0	5.3	8.0	12.0
Cylinder(lateral)	8.7	13.0	19.5	10.7	16.0	24.0
Cylinder(rod)	10.7	16.0	24.0	8.7	13.0	19.5
Dampers	12.7	19.0	28.5	12.7	19.0	28.5
Piping	12.7	19.0	28.5	12.7	19.0	28.5

 

 

[ Overall Constant Vibration Acceleration Criteria ]

Compressor system part	r.m.s. vibration acceleration values for horizontal compressors [㎨]			r.m.s. vibration velocity values for vertical compressors [㎨]
	Evaluation zone boundary			Evaluation zone boundary
	A/B	B/C	C/D	A/B	B/C	C/D
Foundation	2.5	3.8	5.7	2.5	3.8	5.7
Frame(top)	6.7	10.1	15.1	6.7	10.1	15.1
Cylinder(lateral)	10.9	16.3	24.5	13.5	20.1	30.2
Cylinder(rod)	13.5	20.1	30.2	10.9	16.3	24.5
Dampers	16.0	23.9	35.8	16.0	23.9	35.8
Piping	16.0	23.9	35.8	16.0	23.9	35.8

 

[ Overall Constant Vibration Velocity Criteria, Crosshead ]

Compressor system part	r.m.s. vibration velocity values horizontal compressors [mm/s]
	Evaluation zone boundary
	A/B	B/C	C/D
Crosshead guide	6.0	9.0	13.5

 

 

[ Overall Constant Vibration Acceleration Criteria, Crosshead ]

Compressor system part	r.m.s. vibration acceleration values for horizontal compressors [㎨]
	Evaluation zone boundary
	A/B	B/C	C/D
Crosshead guide	7.5	11.3	17.0

 

 

2. 진동 측정 위치

[ Reciprocating Compressor 진동 측정 위치, I ]

 

[ Reciprocating Compressor 진동 측정 위치, II ]

 

[ Reciprocating Compressor 진동 측정 위치, Crosshead ]

 

 

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