Topic
Axial piston pump
About: Axial piston pump is a research topic. Over the lifetime, 10567 publications have been published within this topic receiving 87513 citations.
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TL;DR: A new planar fluid pump based on the valve-less diffuser/nozzle pump principle is presented, which shows pump flows and pump pressures which are more than twice as high as those of the in-phase oscillation mode.
Abstract: A new planar fluid pump based on the valve-less diffuser/nozzle pump principle is presented. The pump consists of two pump chambers, each with two flow rectifying diffuser/nozzle elements with rectangular cross sections, one at the inlet and one at the outlet. The pump chambers are arranged in parallel for high pump flow. Each pump chamber has two piezoelectrically vibrated diaphragms. The planar pump is fabricated in brass with a total thickness of 1 mm. The pump chamber diameter is 13 mm and the diffuser/nozzle element neck dimensions are 0.3×0.3 mm. Simplified theoretical analyses of the maximum pump flow and resonance frequency are given. The flow rectifying ability of the diffuser/nozzle elements is demonstrated in a stationary flow situation and the pump performance is verified in two different pump mode configurations: anti-phase and in-phase chamber volume excitation. The measurements in the anti-phase mode show pump flows and pump pressures which are more than twice as high as those of the in-phase oscillation mode. The anti-phase mode has a pump capacity of about 16 ml/min and a maximum pump pressure of about 1.7 m H2O with the pump diaphragm vibration frequency set to the pump resonance frequency of 540 Hz.
300 citations
Patent•
24 Apr 1999
TL;DR: In this article, a balloon is provided on the distal end of the tube in order to displace said tubing from the right atrium (21) to the pulmonary artery (26), acting as a guiding element in the bloodstream and is driven by natural blood flow.
Abstract: The intracardiac pump (10) comprises a drive section (11) and a pump section (12). Flexible tubing (14) is connected to the pump section (12). A balloon (35) is provided on the distal end of the tubing (14) in order to displace said tubing (14) from the right atrium (21) to the pulmonary artery (26). The balloon acts as a guiding element in the bloodstream and is driven by natural blood flow, thus facilitating placement of the blood pump in the heart.
225 citations
Patent•
05 May 1997
TL;DR: In this article, an apparatus and method for a centrifugal pump for pumping sensitive biologic fluid, which includes an integral impeller and rotor (21) supported by an integral combination of permanent magnets and electromagnetic bearings (52, 54), was presented.
Abstract: An apparatus and method for a centrifugal pump (10) for pumping sensitive biologic fluid, which includes (i) an integral impeller and rotor (21) which is entirely supported by an integral combination of permanent magnets and electromagnetic bearings (52, 54) and rotated by an integral motor (40), (ii) a pump housing and arcuate passages (32, 34, 36) for fluid flow and containment, (iii) a brushless driving motor (40) embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing of impeller position, velocity or acceleration using a self-sensing method and physiological control algorithm for motor speed and pump performance based upon input from the electromagnetic bearing currents and motor back emf -- all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.
178 citations
Patent•
21 Jun 2004
TL;DR: In this paper, a method of pumping wellbore fluid, comprising the steps of installing an electric submersible pump in a well-bore; and operating the pump at more than 4,500 rpm to pump the fluid, is described.
Abstract: A method of pumping wellbore fluid, comprising the steps of: installing an electric submersible pump in a wellbore; and operating the pump at more than 4,500 rpm to pump the wellbore fluid. Pumping in this manner provides a number of advantages in use in that the required high-speed motor and pump is shorter for a given power than existing arrangements, and provides increased reliability due to reduced complexity. A much shorter motor/pump combination also allows such equipment to be used in deviated boreholes with a reduction in damage due to mishandling and bending, as well as facilitating assembly and testing in the manufacturer's plant.
167 citations
Patent•
15 May 2006
TL;DR: In this paper, a signal processor connected to certain sensors for sensing pressures and stresses in the cylinder chambers and the inlet and discharge piping of a single or multicylinder pump is presented.
Abstract: A power pump performance analysis system and methods includes a signal processor connected to certain sensors for sensing pressures and stresses in the cylinder chambers and the inlet and discharge piping of a single or multicylinder pump. Pump speed and pump piston position may be determined by a crankshaft position sensor. Performance analyses for pump work performed, pump cylinder chamber stress, pump fluid end useful cycles to failure, and crosshead loading and shock analysis are provided for estimating pump component life and determining times for component replacement before failure.
165 citations