회전동역학 펌프의 진동 평가 (ISO 10816-7:2009) ISO 10816-7:2009 Mechanical vibration — Evaluation of machine vibration by measurements on non-rotating parts — Part 7: Rotodynamic pumps for industrial applications, including measurements on rotating shafts ISO 10816은 비 회전부의 측정에 의한 기계의 진동을 평가하는 지침을 제시하는 가장 대표적인 진동평가 규격 으로 현재 대부분의 규격들이 ISO 20816으로 개정되었거나 개정진행중이며, ISO 10816-7은 펌프의 Bearing Housing 에서 측정된 진동을 RMS 단위로 평가하는데 이용한다. ISO 10816-1 : Gene..
SUCTION SPECIFIC SPEED & NPSHr (흡입비속도와 NPSHr) SUCTION SPECIFIC SPEED & NPSHr (흡입비속도와 NPSHr) 펌프의 흡입비속도가 흡입성능과 관련이 있다는 것은 알지만 어떠한 관련이 있는지 설명되어 있는 자료는 거의 본적이 없는 듯 하다. 아래 ITT 에서 발표한 논문이 지금까지 본 자료중에 가장 알기쉽게 설명되어 있었다. ABSTRACT The most commonly used hard limitation for pump suction specific speed is 11,000 (US units). This hard limit grew out of the recommendations from a 1982 reliability study by J.L. Hallam (Hallam 1982). Concomitant testing of..
Thrust Balancing http://www.jensenengineeredsystems.com/thrust-balancing/ Radial loads When pumps operate away from their BEP, the pumps will generate uneven pressure forces inside the volute casing causing a radial thrust load on the impeller. The radial thrust load has many detrimental effects on the life of the pump. The first and most obvious is a loading on the bearings. Increased radial loads cause higher ..
Preview of API 610 12th Edition This paper serves as an introduction to API 610 12th Edition, which is expected to be published sometime in 2015. It covers highlights of the proposed changes to the current ISO 13709/API 610 11th Edition and provides insights into the various topics discussed by the API 610 sub-committee. ABSTRACT API 610 Eleventh Edition, Centrifugal Pumps for Petroleum, Petrochemical and Natural Gas Industrie..
Purpose of centrifugal pump casing wear ring and impeller wear ring Purpose of centrifugal pump casing wear ring and impeller wear ring Wear rings can be defined as a device used to seal the pressure leakage of the liquid between the inlet of the impeller and the pump casing. Wear rings are typically found on pumps with closed impellers. A similar device that serves the same function called a wear plate can be found on some pumps with a semi-open impeller. The t..