Wanted: High-Speed Hydraulic Pump

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Sheps Power-User Join Date: Jul 2008 Location: UK Posts: 142	Wanted: High-Speed Hydraulic Pump 08/13/2009 7:00 AM
	Can you suggest a pump that can run off an electric motor running at about 10,000rpm capable of delivering 40MPa of pressure as part of a regenerative braking system for a 2 tonne vehicle. An alternator augments braking & supplies power to vehicles electrics plus running a motor to power the hydraulic pump (via capacitor bank). I am not certain of the flow required through the pump, but perhaps you can suggest how I might go about this. Also how efficient would a pump working at these high speeds be?
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	Pathfinder Tags: hydaulic pump high-speed efficiency

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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: high speed hydraulic pump needed 08/13/2009 7:55 AM
	10krpm is a bit high for a pump. What possibilities exist for gearing down the shaft speed a tickle? And why can't the regeneration be done electrically with battery storage, avoiding the need for a bulky pump as an energy change agent? __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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tcmtech Guru Join Date: Jun 2009 Location: South of Minot North Dakota Posts: 8376 Good Answers: 775	#2 Re: Wanted: High-Speed Hydraulic Pump 08/13/2009 11:55 AM
	Do you work for GM? Five steps to do a single step process... Sounds about right for modern hybrid tech design.
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RVZ717 Guru Join Date: Oct 2008 Location: City of Roses. Posts: 2056 Good Answers: 101	#3 Re: Wanted: High-Speed Hydraulic Pump 08/13/2009 2:26 PM
	Start ... __________________ Don't believe everything you read on the Internet!
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garth Guru Join Date: Sep 2006 Location: NSW Australia Posts: 1101 Good Answers: 23	#4 Re: Wanted: High-Speed Hydraulic Pump 08/14/2009 9:59 AM
	Overly high speeds for hydraulic pumps can cause cavitation and frothing of the oil.It is better to use larger displacement at lower speeds or gear down the motor. __________________ Dont get on to the roundabout if you dont know how to get off
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Sheps Power-User Join Date: Jul 2008 Location: UK Posts: 142	#5 In reply to #4 Re: Wanted: High-Speed Hydraulic Pump 08/16/2009 2:37 PM
	Yes, I hadn't considered cavitation. I was wondering whether there was a pump that worked a bit like the compressor stage on a gas turbine (only with liquid) - having progressive stages to get a high pressure. And no need to change rotation into reciprocation (as with swash plate, etc).
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Anastasiya22 Participant Join Date: Sep 2009 Posts: 1	#6 Re: Wanted: High-Speed Hydraulic Pump 09/16/2009 9:00 AM
	actually there are high-speed pumps, they were designed in Russia. And there speed is equal to 12000 rpm, the problem of cavitation can be solved by using special coverings on metal or preliminary pumps for getting higher pressure
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Anastasiya22 (1); garth (1); PWSlack (1); RVZ717 (1); Sheps (1); tcmtech (1)

You might be interested in: Hydraulic Pumps, Hydraulic Repair Services

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