Topic
Gear pump
About: Gear pump is a research topic. Over the lifetime, 7490 publications have been published within this topic receiving 38837 citations. The topic is also known as: Gear pump.
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Patent•
06 Sep 1979
TL;DR: In this article, an efficient hydraulic motor/pump whose mechanical advantage can be varied while it is operating is described, which can be used with a wave generator, a hydraulic transformer and a hydraulic autotransformer.
Abstract: The invention is an efficient hydraulic motor/pump whose mechanical advantage can be varied while it is operating. Preferred embodiments described include a multi-cylinder reciprocation motor/pump, a variable level power extraction system used with a wave generator, a hydraulic transformer and a hydraulic autotransformer.
25 citations
Patent•
26 Apr 2001
TL;DR: In this paper, a drive mechanism can be utilized either as a pump or an engine with a rod that connects with a power gear via a link pin that joins the power gear at a point offset from the shaft.
Abstract: A drive mechanism can be utilized either as a pump or an engine The device has a piston and cylinder The piston has a rod that connects with a power gear via a link pin that joins the power gear at a point offset from the power gear shaft The power gear orbits about a rim gear A crankshaft gear mounted to a primary shaft is rotated by the orbital movement of the power gear The rim gear and power gear can be placed in position to constrain the rod to move along the axis of the cylinder Also, the rim gear can be rotated to a different position so as to cause the end of the rod to orbit with the power gear This position can be selected to change the stroke length and thus the torque
25 citations
Patent•
22 Dec 1997TL;DR: In this paper, a hydraulic pump control system is presented that can control the absorbing torque of the hydraulic pump with respect to the engine power for driving the pump in a well-balanced manner.
Abstract: A hydraulic pump control system is shown that can control the absorbing torque of a hydraulic pump with respect to the engine power for driving the hydraulic pump in a well-balanced manner, and reduce a deviation of an actual revolution number from a target revolution number of the engine. A torque of hydraulic pumps during operation is estimated from a pump pressure and first and second line pressures. Based on the estimated torque, an output torque of the hydraulic pumps is controlled so that an error between a target revolution number and an actual revolution number of the engine becomes null.
25 citations
Patent•
29 May 2001
TL;DR: In this paper, a downhole gear pump and a transport assembly to which the gear pump is attached are described. But they do not specify the number of passages to be carried in a side-by-side configuration.
Abstract: A well production apparatus includes a down-hole gear pump and a transport assembly to which the gear pump is attached. The transport assembly is formed from a string of modular pipe assemblies having one or more passages for carrying production fluid from the bottom of the well to the surface. The passages can be arranged in a side-by-side configuration, and include pressure and return lines for driving the gear pump. The gear pump includes a hydraulically driven motor that is ganged with a positive displacement gear set. Both the motor and the pumping section have ceramic wear surfaces, the ceramic being chosen to have coefficients of thermal expansion corresponding to the coefficients of thermal expansion of the gear sets. The pumps and rotors have ceramic bushings rather than ball or journal bearings, and are operable under abrasive conditions.
25 citations
TL;DR: A clear interpretation of the displacing action and the transient features of the delivery flow was never addressed in past literature, and an analysis on the kinematic flow ripple is given, showing how such design concept can reduce or even eliminate the k Cinematic flow pulsations.
25 citations