Power Cube v17.08: Difference between revisions
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(Created page with "=Concept= *With 18hp, there are conditions under which hydraulic cooling is not necessary. *Dissipation is 25-40% of input power - 4.5 hp to 7.2 hp *For 18 hp, 5.4kW of heat d...") |
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=Concept= | =Concept= | ||
In order to make the Power Cube much more accessible, we can use a smaller engine - 18 hp - which is approximately 1/3 the effective cost of a 27 HP engine. This would allow us to make smaller machines possible, such as an 18hp walk-behind tractor. The lower cost of the 18hp option allows for wider replicability, and may allow operation without a hydraulic cooler in some applications - reducing cost and complexity significantly. Several major improvements include: | |||
*Design for stable operation with biomass charcoal pellets to move in the direction of renewable energy biofuels that are 10x as efficient as liquid biofuels to produce | |||
*Design for modularity - allowing for interchangeable hydraulic pumps. To date, we have not been using design-for-interchange (completely modular hydraulic pumps) due to the complexity of pump-to-motor coupling. By creating a smart coupling interface, hydraulic pump modularity is feasible, and is the next logical step. This would allow use of the Power Cube | |||
*Simplified frame CNC cut from metal sheet, as opposed to angle, as developed for [[D3D]] and as was discovered is easier to fabricate. With 13 IPM [[Welding Travel Speed]] - a frame can be laid up quickly and welded 24", 12 sides - in 1/2 hour. That is quicker than the standard power cube with angle, where most of the time was spent in setup and squaring. Squaring is automatic in the next case. | |||
:*Material waste could be significant, but not if each side is cut in 2 pieces, so that 12 frame pieces are first welded into 6 sides, then the assembly is welded into the finished product. This moves steel sheet use efficiency from 30% to about 90% efficient for 2' frames. | |||
*Focus on even easier access to parts. | |||
*Remote throttle and starting cable. | |||
*Pull start for use without battery | |||
Minimum viable product: | |||
#Engine | |||
#Pump with quick connects. | |||
No hydraulic cooler, cooler fan, cooler grate and battery. | |||
=More= | |||
*With 18hp, there are conditions under which hydraulic cooling is not necessary. | *With 18hp, there are conditions under which hydraulic cooling is not necessary. | ||
*Dissipation is 25-40% of input power - 4.5 hp to 7.2 hp | *Dissipation is 25-40% of input power - 4.5 hp to 7.2 hp | ||
Revision as of 22:13, 16 April 2017
Concept
In order to make the Power Cube much more accessible, we can use a smaller engine - 18 hp - which is approximately 1/3 the effective cost of a 27 HP engine. This would allow us to make smaller machines possible, such as an 18hp walk-behind tractor. The lower cost of the 18hp option allows for wider replicability, and may allow operation without a hydraulic cooler in some applications - reducing cost and complexity significantly. Several major improvements include:
- Design for stable operation with biomass charcoal pellets to move in the direction of renewable energy biofuels that are 10x as efficient as liquid biofuels to produce
- Design for modularity - allowing for interchangeable hydraulic pumps. To date, we have not been using design-for-interchange (completely modular hydraulic pumps) due to the complexity of pump-to-motor coupling. By creating a smart coupling interface, hydraulic pump modularity is feasible, and is the next logical step. This would allow use of the Power Cube
- Simplified frame CNC cut from metal sheet, as opposed to angle, as developed for D3D and as was discovered is easier to fabricate. With 13 IPM Welding Travel Speed - a frame can be laid up quickly and welded 24", 12 sides - in 1/2 hour. That is quicker than the standard power cube with angle, where most of the time was spent in setup and squaring. Squaring is automatic in the next case.
- Material waste could be significant, but not if each side is cut in 2 pieces, so that 12 frame pieces are first welded into 6 sides, then the assembly is welded into the finished product. This moves steel sheet use efficiency from 30% to about 90% efficient for 2' frames.
- Focus on even easier access to parts.
- Remote throttle and starting cable.
- Pull start for use without battery
Minimum viable product:
- Engine
- Pump with quick connects.
No hydraulic cooler, cooler fan, cooler grate and battery.
More
- With 18hp, there are conditions under which hydraulic cooling is not necessary.
- Dissipation is 25-40% of input power - 4.5 hp to 7.2 hp
- For 18 hp, 5.4kW of heat dissipation may occur passively through the metal in the Power Cube
Parts
- 18hp,
- Log splitter pump - [1] - only 8 hp for 13/3 gpm 650/2500 PSI