Current Topics

Should Thermal Growth Affect Angular Misalignment?

| |

By on January 17, 2012

In my post “How Does Calculating Your Own Alignment Targets Work?”, I discussed using a hot check to determine proper alignment targets. Thermal growth is not rocket science. However, it is often misunderstood. I see people causing harm by compensating for thermal growth incorrectly. Let’s look at a simple blower illustration: If we assume that […]

Read More

How Does Calculating Your Own Alignment Targets Work?

| | | | |

By on January 13, 2012

A recent training class offered us an opportunity to check both the hot and cold alignment conditions on a blower. It was a great time to calculate our own thermal offset values from field data and compare them to the OEM recommendation. So how do we go about doing this? Why would we even want […]

Read More

Have You Calibrated Your Mechanics Lately?

| |

By on January 6, 2012

It’s a new year and time to reassess our goals. We test our gauges, adjust sensor settings, tweak valves, etc. We check our equipment against a standard to verify it still works optimally. When’s the last time you have done the same for your mechanics and technicians? VibrAlign’s shaft alignment courses will calibrate your personnel to […]

Read More

Getting Pushy–Jacking Bolts Revisited

|

By on December 29, 2011

Jacking bolts provide a smoother, easier way of moving machinery than using pry bars and hammers. Their use will almost always speed up the alignment process, prevent excessive minor moves back and forth, and generally make the task of shaft alignment much more pleasant. More and more companies are realizing the benefits of using jacking bolts […]

Read More

Checking Your Thermal Targets

| | | |

By on December 21, 2011

Any equipment that goes through large temperature differences between startup and normal operation should have accurate thermal targets calculated to allow for proper shaft alignment. Shaft alignment data can be taken when the machine is at operating temperature and compared to readings taken when the machine is at ambient temperature. The resulting calculations provide alignment […]

Read More

Meet VibrAlign Trainer, Stan Riddle – VIDEO

| |

By on December 16, 2011

My name is Stan Riddle, I’m a trainer for VibrAlign, I’ve been involved in aligning machinery for about 31 years. My background was as a machinist, and a tool and die maker. In the early 80’s I decided that I would get into maintenance because they would never computerize it, and I’ve been pulling wrenches […]

Read More

Join Us in Houston

By on December 14, 2011

Our next monthly shaft alignment class for the Houston area will be on Jan. 24-25.

Read More

Join Us in Richmond

By on December 14, 2011

Our next monthly shaft alignment class will be held in Richmond on Jan. 24-25.

Read More

VibrAlign, Inc. Announces New Blog

By on December 14, 2011

Via PR Web the press release for the re-launch of our blog.

Read More

Troubleshooting A Compressor Alignment

By on November 29, 2011

We’re going to try something different this week. We see some interesting stuff out there. We want you folks to troubleshoot this one. The OJT portion of a recent alignment training class involved checking the shaft alignment on an engine-driven reciprocating gas compressor. One of the great things about this part of the class is […]

Read More

To Turn or Not to Turn, That is the Question!

| |

By on November 19, 2011

Bowl mills are used to pulverize coal prior to being blown into coal fired boilers. They are very large machines with heavy rotating components usually driven by an internal planetary gear set in the bottom of the mill. A typical steam generation power plant will have multiple bowl mills for each boiler in the facility. […]

Read More

Stacking the Deck Can Get You in Trouble!

By on November 13, 2011

The photo to the right was taken at a recent training class. The maintenance guys at this facility were excellent aligners. They were adamant about getting their shaft alignments to “better than excellent” levels. They believed in preparing the surfaces of the base and the motor before installation. Their company spent thousands of dollars re-working […]

Read More

Thermal Growth-What’s So Hot About It?

By on November 6, 2011

Engineering and technical people often use technical phrases that sound complicated. Thermal growth is one of those terms. It sounds like it could be an engineering marvel – one that would help us perform complicated alignments of high temperature, high speed machines. So, here’s the “secret” of thermal growth. When metal gets hotter, it gets […]

Read More

Aligning Machines Mounted on Chocks

By on October 27, 2011

“Our large machines use adjustable chocks, instead of shims for correcting the vertical alignment; can we use the VibrAlign Verti-Zontal compound move with our Fixturlaser XA when correcting the misalignment?” Absolutely! Adjustable chocks are typically found on large machines such as the engine-compressor sets used in the gas compression industry.  The chocks are used in […]

Read More

Thermal Growth Compensation – Growth Versus Targets

By on October 25, 2011

The object of precision shaft alignment is to position machines so that the rotational centers meet a specified tolerance at operating conditions. Machines can and will move due to temperature changes or process forces so this means that some machines need to be “misaligned” in their off line or cold condition so that they will […]

Read More