Snowblower project: max torque at the impeller blower

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SUMMARY

The discussion centers on optimizing the torque of a custom-built snowblower by adjusting pulley sizes. The snowblower features an 18 hp engine, hydrostatic transaxle, and a 14-inch diameter impeller running at approximately 1200 RPM. Users identified that the current 3-inch pulley may be insufficient for maximizing torque, suggesting an upgrade to an 8-inch pulley to improve performance. The snowblower design combines two 27-inch units into a 54-inch wide machine, which may also affect torque delivery under load.

PREREQUISITES
  • Understanding of pulley systems and torque mechanics
  • Familiarity with snowblower components and configurations
  • Knowledge of engine power ratings and RPM calculations
  • Experience with custom machinery modifications
NEXT STEPS
  • Research pulley size impact on torque and performance in mechanical systems
  • Learn about hydrostatic transaxle operation and its effect on snowblower efficiency
  • Investigate the relationship between impeller diameter and snow throwing capability
  • Explore best practices for custom snowblower design and modifications
USEFUL FOR

This discussion is beneficial for DIY enthusiasts, mechanical engineers, and anyone involved in custom snowblower design or optimization, particularly those looking to enhance performance through pulley adjustments.

jayjay
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Hi Guy
Hopefully someone can help me.
Here's my project my issues is pulley size for getting the max torque at the impeller blower. I need to found the p2, p3 and p4 pulley size in the picture to get the maximum torque at p5 and p6.
Here a link on YouTube of what I have right now it does work but when there a load of snow it stop throwing
 

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I built a hot rod snowblower. It's a 32" wide walk behind, has an 18 hp engine, and a hydrostatic transaxle. The impeller is 14" diameter, 5" wide, and is geared to run the impeller about 1200 RPM. It has enough power to throw heavy wet snow, and even slush, without bogging down the engine. I have had no trouble with belts slipping. Here's a link to two YouTube videos showing it in action: https://www.youtube.com/channel/UCJmhb9RpdAncCuuy6cP9NfQ.

It's not clear what your problem is. Do the belts slip, or do you overload the engine? It's not clear just what your snowblower is. It sort of looks like you took two snowblowers, welded them together, and are driving them with one engine. Is that correct? If so, what size and power were the donor snowblowers, and how wide is the new snowblower? What was the RPM of the impellers of the donor snowblowers, and what is the RPM of the impellers in your new snowblower?
 
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jrmichler said:
I built a hot rod snowblower. It's a 32" wide walk behind, has an 18 hp engine, and a hydrostatic transaxle. The impeller is 14" diameter, 5" wide, and is geared to run the impeller about 1200 RPM. It has enough power to throw heavy wet snow, and even slush, without bogging down the engine. I have had no trouble with belts slipping. Here's a link to two YouTube videos showing it in action: https://www.youtube.com/channel/UCJmhb9RpdAncCuuy6cP9NfQ.

It's not clear what your problem is. Do the belts slip, or do you overload the engine? It's not clear just what your snowblower is. It sort of looks like you took two snowblowers, welded them together, and are driving them with one engine. Is that correct? If so, what size and power were the donor snowblowers, and how wide is the new snowblower? What was the RPM of the impellers of the donor snowblowers, and what is the RPM of the impellers in your new snowblower?
TX for the reply
Yes 2x27 inch together so 54 inch
8hp 10 hp moteur original
14 inch diameter also both of them same impeller and I'm guessing 1100 or 1200 rpm
I don't think the belt is slipping but hoard to say if there not enough torque maybe they are
 
jayjay said:
TX for the reply
Yes 2x27 inch together so 54 inch
8hp 10 hp moteur original
14 inch diameter also both of them same impeller and I'm guessing 1100 or 1200 rpm
I don't think the belt is slipping but hoard to say if there not enough torque maybe they are
Here the last test at the end the belt snap and there's no snow
 
Pulley that I have right now on the shaft is 3 inch from the motor and 3 inch going on both impeller pulley
 

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jrmichler said:
I built a hot rod snowblower. It's a 32" wide walk behind, has an 18 hp engine, and a hydrostatic transaxle. The impeller is 14" diameter, 5" wide, and is geared to run the impeller about 1200 RPM. It has enough power to throw heavy wet snow, and even slush, without bogging down the engine. I have had no trouble with belts slipping. Here's a link to two YouTube videos showing it in action: https://www.youtube.com/channel/UCJmhb9RpdAncCuuy6cP9NfQ.

It's not clear what your problem is. Do the belts slip, or do you overload the engine? It's not clear just what your snowblower is. It sort of looks like you took two snowblowers, welded them together, and are driving them with one engine. Is that correct? If so, what size and power were the donor snowblowers, and how wide is the new snowblower? What was the RPM of the impellers of the donor snowblowers, and what is the RPM of the impellers in your new snowblower?
Wow now that's is throwing no problem with the speed your going nice job I wish I could. Figured the problem on mine I believe my issue is the 3 inch pulley on the shaft that is to small I should go. With 8 inch
 

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