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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01 Jan 1999
TL;DR: In this paper, the concept of a PUMPING system was introduced and the following characteristics of a pump system were discussed: Liquid Transfer Input Input Power, Losses and Efficiency System Curve Pump Curve CENTRIFUGAL PUMP-FUNDAMENTALS Affinity Laws Helpful Formulas Per Centrifugal Pump Triangles Quiz #1: Velocity triangles Performance Curves Quiz#2: How much money did a maintenance mechanic save his plant? Performance Modifications Q2: A Valve puzzle Underfiling and overfiling Design Modeling Techniques Specific Speed (
Abstract: INTRODUCTION CLASSIFICATION OF PUMPS CONCEPT OF A PUMPING SYSTEM Liquid Transfer Input Power, Losses and Efficiency System Curve Pump Curve CENTRIFUGAL PUMP-FUNDAMENTALS Affinity Laws Helpful Formulas Per Centrifugal Pump Triangles Quiz #1: Velocity triangles Performance Curves Quiz #2: How much money did a maintenance mechanic save his plant? Performance Modifications Quiz #3: A Valve puzzle Underfiling and Overfiling Design Modeling Techniques Specific Speed (Ns) GEAR PUMPS - FUNDAMENTALS Quiz #4: Gear Pump Capacity Cavitation in Gear Pumps Trapping Methods Lubrication User Comments MULTIPLE SCREW PUMPS Three Screw Pumps Two Screw Pumps User Comments PROGRESSING CAVITY (SINGLE SCREW) PUMPS Principle of Operation Pump Performance Considerations Power Requirements Fluid Velocity and Shear Rate Fluid Viscosity Inlet Conditions Guidance for Proper Selection and Installation Progressing Cavity Pump Applications Troubleshooting User Comments METERING PUMPS Definition Features Where Are Metering Pumps Used? Types of Metering Pumps Components of Metering Pumps Metering Pumps Selection Control and Integration Accessories Typical Applications The Advantages of Rotary Pumps Case History #1: Double Suction Centrifugal Pump, Suction Problem Quiz #5: Are Ns and Nss dependent on speed? Case History #2: Lube Oil Gear Pump, Noise and Wear Reduction Quiz #6: Doubling the Gear pump life in 10 minutes?! Case History #3: Progressing Cavity Pump Failures Troubleshooting "Pointers" as Given by Interviewed Pump Users and Plant Personnel Application Criteria and Specification Parameters Closing Remarks Appendices
39 citations
TL;DR: In this article, a hybrid on-chip two-phase cooling cycle specifically designed to cool server boards with chips of high performance computers was experimentally evaluated considering steady-state and transient operation of two parallel pseudo-chips and auxiliary electronics mimicking a real server board.
39 citations
Patent•
18 May 1992TL;DR: In this paper, a speed control system for an engine cooling fan has a planetary gearset, variably establishing a ratio between input and output speeds, and a hydraulic controller for changing the speed ratio according to engine operating conditions.
Abstract: A speed control system for an engine cooling fan has a planetary gearset, variably establishing a ratio between input and output speeds, and a hydraulic controller for changing the speed ratio according to engine operating conditions. Either one of a sun gear and pinion gear constitutes an input gear connected to an engine output of the engine. The other one of the sun gear and pinion gear is operationally coupled to a hydraulic control and a ring gear constitutes an output gear driving a rotary body. The hydraulic controller applies and varies an operational resistance to the planetary gearset according to engine operating conditions so as to cause it to vary the ratio of input and output speeds.
39 citations
Patent•
18 Oct 1968
TL;DR: In this paper, a flow passage lengthwise of the casing of a polyethylene polypropylene (Polypropylene) nozzle is used to produce foils from thermoplastic synthetic plastic material, where the flow of plastic material between the gears and the exit slit is of substantially uniform width.
Abstract: A nozzle for producing foils from plastic material, preferably thermoplastic synthetic plastic material, has a flow passage lengthwise of the casing of the nozzle. The passage defines at one end a wide exit slit and at the other end a feed port of annular configuration. Meshing gears of a gear pump interposed intermediate the exit slit and the feed port drive the plastic material through the flow passage and toward the exit slit. The widths of the slit, the gears and the flow passage are such that the flow of plastic material between the gears and the exit slit is of substantially uniform width whereby a substantially uniform gauge and strength characteristics of the foil across its width are obtained.
39 citations
TL;DR: In this article, a procedure based on the analysis of the losses in the pump was developed to predict the performance of centrifugal pumps operating with highly viscous fluids, which revealed that disk friction losses and friction losses in hydraulic passages of the pump are the dominating factors.
38 citations