ANSI/HI Rotodynamic Pumps for Vibration Measurements and Allowable Values. New in this Standard: Recommended default initial field alarm and trip settings are now referenced in ANSI/HI Rotodynamic Pumps – Guideline for. Hydraulic Institute Standards: ANSI/HI Covers Horizontal and Vertical. Centrifugal Pumps. Recommends use of RMS velocity.
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One of the cookies we use is essential for parts of the site to operate properly. In the case where I need to comply with this vibration level, what extraordinary measures can be taken to meet this spec.? Register now while it’s still free! I’ve been on both sides of that process, and I don’t envy you if you can’t get some relief. The Hydraulic Institute HI is the largest association of pump producers and suppliers to the pump industry in North America and is a global authority on pumps and pumping systems.
Blade pass for a 3 bladed impeller starts to approach some parity.
Circulation Water Pumps Exceed ANSI HI Vibration Limit – Mechanical Solutions
The vibration levels were just below specification requirement upon installation, but over time, the vibration increased by almost a factor of The largest combined-cycle natural gas-fired power facility in Canada was measuring excessive vibration on two single stage circulation water pumps CWP. Modifications made to fix the vibration problem.
Such issues are the result of project complexity, size, uniqueness and regulation, as well as the need for virtual team collaboration. I’d say 1X and blade pass are xnsi to be what give you trouble aplenty. Spud says; Meticulous effort and willingness to learn are honorable traits.
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Circulation Water Pumps Exceed ANSI HI 9.6.4 Vibration Limit
This standard is based on experiences from pump users and manufacturers as well as vibration measurements by many companies. Site designed by newmedia. Currently Seeking Members View in eStore.
Without the use of FEA, most modifications do not resolve the issue the first time around, or worse, other natural 9.6. are brought into the operating speed range.
Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor. HI Ani Standards are reliable, widely accepted references for anyone involved in pumps, including users, consultants, contractors, construction firms, manufacturers of pumps, seals, motors, instrumentation, controls, and pump software developers and systems integrators. Using Orbits for Condition Monitoring. Students Click Here Join Us!
HI publishes rotodynamic pumps for vibration standard
But the VFD is going to go hunting ruthlessly for resonances, and it is rare for vertical pumps not to end up with a few resonances right in the operating range somewhere. It describes the benefits to pump longevity when the net positive suction head NPSH available is greater than the NPSH required by a suitable margin, and suggests margins for specific applications. The vibration measurement is to be taken at the top motor bearing.
Finite element analysis plot of resulting mode shape after modification. Click on image to animate.
The HI method enables pump users and designers to estimate performance of a particular rotodynamic pump on liquids of known viscosity, given the performance on water. It pertains to evaluation of vibration when the vibration measurements are made on non-rotating parts bearing housing vibration.
HI periodically introduces new Standards based on industry needs. Resources Few production environments have the luxury of ordering new equipment to replace existing machines on their shop floor.
Promoting, selling, recruiting, coursework and thesis posting is forbidden. Some amount of bracing or stiffening should help. This is an empirical method based on the test data available from sources throughout the world.