Building a pressure washer

[TheDude]

I don't know how mechanically savvy you folks are here, but I wonder if I could ask you a few questions pertaining to pressure washer building.

I have two components. A motor and a Pump. I need to know if these two components are compatible with each other. The main topic of concern is the crank shaft diameter and the horse power. The crank shaft of the motor is 1" diameter, and the diameter of the pump shaft is 1", that is if I read the spec sheets right. I wounder if someone would confirm this. Also, the horsepower is of concern. The spec sheet for the pump states that in order for the pump to reach 4000 psi, it requires an 8.2 horsepower motor. The motor I chose is 13.0 HP. Is this going to be a problem?

EDIT: Would this motor work better? It is 9 hp instead of 13. Also, the RPMS are lower. Another question: This is a direct drive pump, so will I have to worry about loss of horse power?

 

[jverne]

dude...without any heavy tools you are never going to make an adapter to fit the motor to the pump.


you would be immensely better off buying a cheap pressure washer.

http://www.everypressurewasher.com/Campbell-Hausfeld-PW135099AV-CHP1823.html


seriously without tools and mechanical knowledge you really won't produce something useful.

 

[Maxi]

wth do you need 4000 PSI for anyway!?

 

[Raziaar]

wth do you need 4000 PSI for anyway!?

He wants to wash his friends away. No evidence!

Actually for that you might need more psi. Perhaps one of those industrial water jet cutters that they cut steel with. That'd work!

 

[xcellerate]

seriously, I'm all for DIY projects, but in this case you'd be a lot better off just buying one. They can be had for $200, plus they have a warranty, plus they will be safer (home built one may explode), plus setup is a lot easier, and I'd be willing to bet you'd spend more money building one yourself.

 

[TheDude]

This is for a class project. I have to get all the parts together and spec them out, but I'm not actually going to build it. So jverne, are you saying that these two components are incompatible without some sort of adapter?

 

[<RJMC>]

what if you fill the exausts of your car whit water and turn on the engine?

the pressure will pump the water whit a good strength

 

[TheDude]

what if you fill the exausts of your car whit water and turn on the engine?

the pressure will pump the water whit a good strength

I wouldn't want to do that to my Ferrari.

 

[Seppo]

do you perhaps want to do this?

ACTION!

 

[jverne]

This is for a class project. I have to get all the parts together and spec them out, but I'm not actually going to build it. So jverne, are you saying that these two components are incompatible without some sort of adapter?

well it's hard to see due to lack of pictures and specific data.

from the looks the motor would work but the pump seems some industrial grade pump for 3-phase electro motors.

again from the looks it would be impossible to put the two together without some serious custom made adapter.

but there might be a redneck way to do it but at that power i'd be somewhat afraid to stand besides it. the trick is to connect the motor shaft with the pump shaft using a tough rubber tube. the rube would act as a flexible shaft axis

tube

here is the idea

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this allows you some tolerance is the shaft aren't centered and allows you to distance both parts. but the pump still needs tremendous steel or Al chassis that fixes both the pump and motor. Make sure the tube is as tight as possible to both shafts. Because if the pump isn't fixed you'll have a small meteorite in your classroom.

but if you have no experience with mechanics i would not advise you to do such highly dangerous contraptions.

have you ever thought about getting some used old garden pumps connecting them parallel and make a small nozzle?

 

[Raziaar]

do you perhaps want to do this?

ACTION!

Haha, that's awesome!