Valve Plate to Barrel Clearance of a Fixed Displacement Axial Piston Motor

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yaj lleb Associate Join Date: Sep 2012 Posts: 34	Valve Plate to Barrel Clearance of a Fixed Displacement Axial Piston Motor 02/03/2013 12:03 PM
	good day to all!! I want to ask how much clearance i could give to my fixed displacement axial piston motor between valve plate and barrel. thanks guys for your response on this matter...
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/03/2013 12:47 PM
	Call a service tech. Call the manufacturer. Call a service tech. Consult the operator's manual Call a service tech. It's obvious that you have no mechanical person on staff. Call a service tech. Go on-line and search for an answer. Do you know the manufacturer? Call a service tech.
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yaj lleb Associate Join Date: Sep 2012 Posts: 34	#3 In reply to #1 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/04/2013 9:02 AM
	Sir I no longer have a manual for this motor and I cant contact the manufacturer. this is a very old grab machine, the brand of the motor is Linde.I tried to go on line to get some information but I havent gotten the information I want. Can you give me a minimum safe clearance. The typical clearance or range. It so happen that the nameplate of the motor is already unreadable. I cant get the gpm and horse power anymore and the rpm. sorry for the bother...
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#4 In reply to #3 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/04/2013 7:20 PM
	.018 __________________ All living things seek to control their own destiny....this is the purpose of life
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nick name Guru Join Date: Mar 2007 Location: City of Light Posts: 3943 Good Answers: 183	#5 In reply to #4 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/05/2013 4:03 AM
	Units ?
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#8 In reply to #5 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/05/2013 10:03 AM
	mm.... __________________ All living things seek to control their own destiny....this is the purpose of life
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yaj lleb Associate Join Date: Sep 2012 Posts: 34	#6 In reply to #4 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/05/2013 8:18 AM
	THANKS...
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nick name Guru Join Date: Mar 2007 Location: City of Light Posts: 3943 Good Answers: 183	#7 In reply to #6 Re: valve plate to barrel clearance of a fixed displacement axial piston motor 02/05/2013 9:03 AM
	Above picture is a cutaway from a LINDE catalogue you could find by Google as I did. As I mentioned the barrel is between the swash plate and the distribution and if it can transmit torques it is free in axial direction so that a hydrostatic bearing forms between its right surface and the distribution plate. The distance between the surfaces will depend on several factors as I mentioned and should be free to install I do not see how you intend to give a gap. If you put a washer you risk the destruction of your mirror and at least high leaks.For hydrostatic bearings the gap is in the range of a few 0.01mm.Solar Eagle gave an inch value (I presume) which represents 0.457 mm ! It is by far too high. If you have not any original document put the parts to form an exploded view and make a couple of pictures.I am sorry to say that I am deeply disappointed by counsel based on nothing.
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nick name Guru Join Date: Mar 2007 Location: City of Light Posts: 3943 Good Answers: 183	#2 Re: Valve Plate to Barrel Clearance of a Fixed Displacement Axial Piston Motor 02/03/2013 4:44 PM
	Can you show a cutaway of your motor ? In general the clearance is due to a balance of forces from cylinders and oil film. The clearance depends on working pressure and rpm. An oil wedge forms and carries the loads and this is done to minimize the leaks at the distribution plate. May be your motor has a special design with a fixed clearance. Think that for same pressure in case of a constant clearance the leaks are proportional to pressure/viscosity and clearance ^3 if the Re number is under the laminar limit in the gap.
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lyn (1); nick name (3); SolarEagle (2); yaj lleb (2)

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