Uji Pengaruh Susunan Pompa Sentrifugal Satu Tingkat Secara Seri terhadap Karakteristik Vibrasi

Abstract

This research concerns ahout the result experimental load force give dynamomdcr to\vard single stage centrifugal pump in series operation. Centrifugal pump is used in this research with maximum head 17 m, maximum capacity 3.2 liter/sec and 1850 watt power. PVC pipes arc used at suction pipes and discharge pipes. Diameter is 2,.5 in and 0.77 m long, it is equipped with valve and manometer. Diameter discharge pipes is 3 in with 3.78 m long, it is equipped with valve, manometer, and tlowmcter. Static head is 0.77 m and 3.9 m total head system. Vibration characteristic testing is started from force 2 kg, 2.2 kg, 2.4 kg, 2.6 kg, 2. 8 kg, and responding of vibration is measured by vibrometer digital Hand Held Vibration meter 908 B . Measured point are eight points : at base plate P-01, P-02, P-03, P-04 , at pump P-05, P-06, at electrornotor P-07, P-08, and measured from axial, vertical and horizontal direction. The result of the research is found out that increase give load and head made increase vibration emerge. The highest displacement occurs in pump one at P-05 point with displacement value 3,99 μ m, and the lower displacement occurs in electromotor two at P-08 point with displacement value 5,65 μ m . The highest velocity occurs in base plate at P-03 point with acceleration value 6.52 m/sec, the lower acceleration occurs in pump at P-06 point \vith acceleration horizontal value 5.30 m/scc. the highest acceleration occurs in base plate at P-04 point with acceleration value 3.85 m/scc2 , the lower accderntion occurs in electromotor at P-08 point ,vith acct:lcration Value 5755 rn/sec2 . The smaller head is the higher value frequency and the higher capacity is the higher value rrcquency