B-rad Posted August 31, 2017 Share Posted August 31, 2017 Anyone have ideas on how to reduce the noise from my still mixer/auger. Its very loud and we have a super small distillery with a tasting room at one end. I am trying to make it so I can produce and sell bottles at the same time, its difficult with the mixing blade going. I tried building a plywood box around it and it didn't help much, also tried acrylic. Its also hard to tell if it helped at all, after listening to it all day. Any ideas? Link to comment Share on other sites More sharing options...
Southernhighlander Posted August 31, 2017 Share Posted August 31, 2017 Is it a very loud screeching noise like screech, screech, screech? if so it sounds like the air seals are out of adjustment. If you can send me a pic or 2 of the motor and every thing that is outside of the still pot especially of the air seals, I can set up a call with one of my techs and they can help you adjust it out. My email is paul@distillery-equipment.com Link to comment Share on other sites More sharing options...
Stumpy's Posted August 31, 2017 Share Posted August 31, 2017 It could also be the key coupling the motor to the gear reducer. We just dealt with that on our still. It was kind of a grinding sound with a squeak. We just pulled it apart, repaired the motor shaft, replaced the key and it's all quiet again. Not sure why the motor shaft wallowed the key-way out in the period of a couple of months, but it happened. Cheers! 1 Link to comment Share on other sites More sharing options...
Skaalvenn Posted September 1, 2017 Share Posted September 1, 2017 Mixer should be nearly completely silent. I put a black mark on the shaft in the air gap so that I can visually see it turning (electric brawn mixer). If it's 3ph hooked up to a frequency drive you might get noise if the drive is not configured right. Other than that, you need to post a lot more data other than "noise" because we don't know if it's air or electric powered, if its a grinding, squealing or electrical buzz or what. 1 Link to comment Share on other sites More sharing options...
B-rad Posted September 1, 2017 Author Share Posted September 1, 2017 Sorry for the lack of info, its a electric 3ph motor. I have been running it for over 2.5 years, and its always been loud. Its not a shrieking noise, just sound like a loud electric motor hum. I don't think anything is wrong with it, but I hope it might be something I can fix if there is. If it is working as it should, then I am look to contain the noise. thanks Link to comment Share on other sites More sharing options...
Southernhighlander Posted September 1, 2017 Share Posted September 1, 2017 Do you have a vfd on it? Link to comment Share on other sites More sharing options...
McClintockDistilling Posted September 1, 2017 Share Posted September 1, 2017 Ditto to Southernhighlander. We put a VFD on ours and it is really quiet running at 40hz vs 60hz. Great for your holds and mixing in enzymes, but we do run it at 60 for the mill in. Link to comment Share on other sites More sharing options...
Silk City Distillers Posted September 2, 2017 Share Posted September 2, 2017 I'll second that, mine also seems to be much quieter running at 50hz than 60hz. Link to comment Share on other sites More sharing options...
B-rad Posted September 26, 2017 Author Share Posted September 26, 2017 Thanks for all the help guys! I installed a vfd on it and the motor is much quieter. Unfortunately, now I have motor whine because of the vfd. I have tried raising the carrier frequency but at 11 it is still whining and I'm worried about pushing it above that. I read something about skip function but don't really understand it or if it will help. I have also heard I could install a rubber vibration isolation pad to it. Any other info you guys have I would appreciate. Thanks this is the vfd UPDATED 2.2KW VARIABLE FREQUENCY DRIVE INVERTER VFD 220V 3HP 10A HIGH QUALITY Link to comment Share on other sites More sharing options...
Dehner Distillery Posted September 26, 2017 Share Posted September 26, 2017 you need to change the "carrier frequency". If the motor is on a vfd you can go into the settings and adjust the setting. Factory is normally 2-4hz try 8hz or go up to 16hz Link to comment Share on other sites More sharing options...
biodzldan Posted September 26, 2017 Share Posted September 26, 2017 15 hours ago, B-rad said: I have tried raising the carrier frequency but at 11 it is still whining and I'm worried about pushing it above that. Typically, the more you increase the frequency, the quieter it will become. This is for a few reasons: you're hopefully well above the resonant frequencies of anything you're attached to and therefore not exciting them, as well as moving most of the noise above the range where human hearing is most sensitive (2-5kHz). This comes at the cost of lower efficiency - most of the losses in the silicon occur during the switching as opposed to the 'ON' state. If your motor is rated for use with a VFD, I don't think you will experience much trouble by raising the frequency. The voltage transients and internal heating effects should *hopefully* have been anticipated by the manufacturer. I just had to deal with a similar problem on a machine that my company manufactures. Link to comment Share on other sites More sharing options...
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