Hydraulic Motor design
Hydraulic Motor design
(OP)
Hello, I am needing to design a hydraulic motor (don't ask why I cannot just go buy one). Is there any information on the internet or books for designing the motor?
Thanks!
Thanks!
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RE: Hydraulic Motor design
Ted
RE: Hydraulic Motor design
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Hydraulic Motor design
Somebody came up with the bright idea to drive one of the hones with (3) Double Acting Hydraulic Cylinders positioned radially around and driving a Crankshaft. Each one had a 4-Way Directonal Control Valve that were controlled by Limit Switches on a Cam that shifted the valves to make the cylinders push or pull as the Hone turned.
The hone turned at about 150 RPM and honed cylinder tubing up to 16" Dia.
The other function of the drive was to test new ideas on cylinder design amd material since many cycles were put on the cylinders quickly at (3) shifts a day 5 days a week.
Bud Trinkel, Fluid Power Consultant
HYDRA-PNEU CONSULTING
RE: Hydraulic Motor design
RE: Hydraulic Motor design
It is much easier to buy a motor that has a torque output that matches your requirements than it would be to design one.
To design a rotor form that gives the torque and displacement you require would be tricky to say the least.
The distributor valve design and manufacture would be equally tricky.
You could spend thousands and take several years to design the perfect motor to suit your application, then find one with exactly the same performance at your local motor stockist.
All of the above excludes work on castings, shafts and shaft seals...etc.
Adrian
RE: Hydraulic Motor design
No, I don't work for Parker. I have used their gerotor elements in product design.
http://www.parker.com/nichport/development.asp
Ted
RE: Hydraulic Motor design
Could you give more details about the porting in these motors?
I cannot see how, through static ports in the housing, the oil can be fed into a moving rotor set and still keep the set turning.
Thanks
Adrian
RE: Hydraulic Motor design
The key is the gear set rotates around a fixed axis. It doesn't orbit around the fixed axis. Therfore you can use static ports and do not need the rotating valve or the intermediate drive connector to the ouput shaft. It is an internal/external gear version of the external/external gear set.
Ted
RE: Hydraulic Motor design
http://www.parker.com/ead/cm2.asp?cmid=8954
Ted
RE: Hydraulic Motor design
If you must build a motor start with a 2000, 4000, 6,000 or 10,000 series bearing less Charlynn, purchase their soft splined shaft and go from there.
Ed Danzer
www.danzcoinc.com
www.dehyds.com
RE: Hydraulic Motor design
Now the design work begins knowing the variations available. Determine the speeds and torque required. Sort through the motor displacements for the required performance. Determine hydraulic flows and pressure, the hydraulic system already exists. The motor may be an orbiting gerotor or non-orbiting gerotor. The catalog will help by giving data against which the requirements can be compared.
Only ecope can decide.
Ted