Browse Prior Art Database

Hydro Electric Drive

IP.com Disclosure Number: IPCOM000097666D
Original Publication Date: 1961-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Moss, SK: AUTHOR

Abstract

The drive accelerates a load from a rest position to a desired speed in less than one revolution. The drive maintains constant speed until further command, then stops and returns the load to the original rest position.

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Hydro Electric Drive

The drive accelerates a load from a rest position to a desired speed in less than one revolution. The drive maintains constant speed until further command, then stops and returns the load to the original rest position.

The acceleration from the rest position is accomplished by a hydraulic torque motor 10 which acts through a dog clutch 12 to positively drive the load 14 to the desired speed. At the desired speed, the dog clutch 12 is disengaged and a hydraulically operated friction clutch 16 engages 14 to a synchronous motor 18 which drives it at the constant speed. Upon command, clutch 16 is disengaged and clutch 12 re-engages 14 and brings it to a hydraulically damped stop.

In the rest position, the vane 20 of 10 is counterclockwise against stop 22. To initiate the acceleration, valve A is moved to connect line 1 to pressure and line 2 to sump. At the same time, valve C is moved to connect line 3 to line 5. Vane 20 moves clockwise and drives 14 through clutch 12 until it completes one half a revolution and connects line 1 with line 3. Pressure is then supplied to lines 3 and 5. Clutch 16 engages, and clutch 12 disengages. Vane 20 continues to rotate until it blocks line 4, when it comes to a damped stop. It remains in this position until it is desired to stop 14.

To stop 14, valve B is moved to connect line 6 to sump and valve C is moved to connect line 5 to sump. Clutch 12 is then engaged and the clutch 16 disengaged. Vane 20 moves clockwi...