作者: Expressly 時(shí)間: 2025-3-21 20:31
Biosynthese und Stoffwechsel der Oestrogeneol, sewage handling and treatment, food industries, chemical and petrochemical industries, process industries (e.g., textiles and leather), domestic appliances, mining and ore processing, transporting liquid-solid mixtures, environmental control, spaceships, airplanes, and motor vehicles. The list c作者: foliage 時(shí)間: 2025-3-22 03:00
On Round-Off Errors in Linear Programmingt of the presence of free air has been discussed earlier in the section on priming (Chapter 1). However, even when a pump has been primed properly, free air can appear during operation and disrupt the performance of the pump.作者: 要素 時(shí)間: 2025-3-22 06:26 作者: nonplus 時(shí)間: 2025-3-22 11:08 作者: 犬儒主義者 時(shí)間: 2025-3-22 15:27
Optimierung unter dem Einfluss von Rauschen,oped by the pump is used up by the resistance of the pipelines to flow. This resistance is caused by friction between the liquid and the wetted surfaces of the pipes (or ducts), and by changes in the direction of flow. It is also caused by the changes in the diameter of the pipes and the resistance 作者: 犬儒主義者 時(shí)間: 2025-3-22 19:24 作者: restrain 時(shí)間: 2025-3-22 22:53 作者: 秘傳 時(shí)間: 2025-3-23 02:00 作者: 承認(rèn) 時(shí)間: 2025-3-23 08:01
On Stability of Convex Operators,ard the center. Depending on the amount of gas contained in the liquid, this displaced gas fully or partially blocks the inlet to the impeller vanes. In the first case, the pump is not able to deliver any liquid. In the second case, the pump may start to deliver a reduced amount of liquid, provided 作者: Ceremony 時(shí)間: 2025-3-23 12:09
http://image.papertrans.cn/c/image/223224.jpg作者: 審問(wèn) 時(shí)間: 2025-3-23 17:39
https://doi.org/10.1007/978-1-4613-1217-8cavitation; classification; control; efficiency; energy; future; geometry; identification; liquid; quality co作者: 共同時(shí)代 時(shí)間: 2025-3-23 19:11
Biosynthese und Stoffwechsel der Oestrogeneol, sewage handling and treatment, food industries, chemical and petrochemical industries, process industries (e.g., textiles and leather), domestic appliances, mining and ore processing, transporting liquid-solid mixtures, environmental control, spaceships, airplanes, and motor vehicles. The list can go on and on.作者: SCORE 時(shí)間: 2025-3-24 00:59 作者: Charlatan 時(shí)間: 2025-3-24 06:05 作者: Neolithic 時(shí)間: 2025-3-24 08:43 作者: 失眠癥 時(shí)間: 2025-3-24 13:09 作者: Collected 時(shí)間: 2025-3-24 15:26
https://doi.org/10.1007/978-3-642-95291-3ese characteristics are usually determined on the basis of tests performed by the manufacturer during the development stage of a given unit. However, to be of real value to a pump user, such tests must be carried out correctly. Otherwise, the pump user my be confronted with very unpleasant surprises.作者: Thyroxine 時(shí)間: 2025-3-24 19:03
Martin Gr?tschel,Manfred W. Padbergue at a given flow rate is needed. Rarely does a pump operate under constant conditions. In practice, it usually operates over a wide spectrum of heads, flow rates, and available NPSH values. This may impose more requirements on a pump than simply operating satisfactorily under a given NPSH.作者: Bravado 時(shí)間: 2025-3-24 23:50 作者: 兩種語(yǔ)言 時(shí)間: 2025-3-25 03:37
On Regenerative Processes in Queueing TheoryProblems related to elevated temperatures can be subdivided into two classes: overheating caused by mechanical faults and problems related to pumping hot liquids.作者: 眼界 時(shí)間: 2025-3-25 08:42 作者: 護(hù)航艦 時(shí)間: 2025-3-25 11:41 作者: 侵害 時(shí)間: 2025-3-25 17:58 作者: Bravado 時(shí)間: 2025-3-25 21:22
Optimale Entscheidungen in OrganisationenBearings support the rotating elements of the pump and keep them in proper position relative to other parts and the driver. Failure of a bearing may change the position of the rotating elements, which will cause interference between the stationary and moving parts of the pump, and may lead to fractures or seizing of parts.作者: 眼界 時(shí)間: 2025-3-26 00:21
Rotodynamic PumpsThe term . refers to a class of devices that use rotating blades to increase the head of the pumped liquid, by altering its state of motion. This class of pumps includes the following: Axial flow, Centrifugal and mixed-flow, Regenerative pumps.作者: 違法事實(shí) 時(shí)間: 2025-3-26 04:48
Effects of Temperature and Viscosity on Pump PerformanceProblems related to elevated temperatures can be subdivided into two classes: overheating caused by mechanical faults and problems related to pumping hot liquids.作者: 砍伐 時(shí)間: 2025-3-26 10:18
RecirculationFor many years, recirculation was regarded as some sort of mysterious factor responsible for every problem that could not be explained. As such, it had no exact definition suitable for analytical discussion. This sometimes led to inaccurate or misleading conclusions, as shown by the case history presented here.作者: 展覽 時(shí)間: 2025-3-26 13:55
Axial and Radial Thrust and BalancingWhen a liquid is acted on by an impeller, its head increases by an amount equal to ..This head consists of the static pressure head . and the velocity head C./2., where . is the absolute velocity of the liquid at the impeller outlet.作者: Bravado 時(shí)間: 2025-3-26 16:51
Pumping System LayoutThe size and geometry of a sump, tank, or container from which liquid enters the suction line has enormous effects on pump performance. In particular, the choice of these parameters may be critical when the dimensions of the source where the pump gets its liquid is compared to the handled flow rate.作者: 按時(shí)間順序 時(shí)間: 2025-3-27 00:47 作者: 河流 時(shí)間: 2025-3-27 03:48 作者: 遠(yuǎn)地點(diǎn) 時(shí)間: 2025-3-27 06:15 作者: Heretical 時(shí)間: 2025-3-27 11:51 作者: 慟哭 時(shí)間: 2025-3-27 17:22 作者: DAMP 時(shí)間: 2025-3-27 17:50 作者: blight 時(shí)間: 2025-3-27 23:21
Testingese characteristics are usually determined on the basis of tests performed by the manufacturer during the development stage of a given unit. However, to be of real value to a pump user, such tests must be carried out correctly. Otherwise, the pump user my be confronted with very unpleasant surprises.作者: 使堅(jiān)硬 時(shí)間: 2025-3-28 06:08
Pump Performance at Reduced NPSHue at a given flow rate is needed. Rarely does a pump operate under constant conditions. In practice, it usually operates over a wide spectrum of heads, flow rates, and available NPSH values. This may impose more requirements on a pump than simply operating satisfactorily under a given NPSH.作者: compel 時(shí)間: 2025-3-28 08:48
Book 1996es specific examples on how to modify pumpperformance for increased efficiency and better quality control,which turn into long-term cost savings. Some basic theory is includedto give the reader greater understanding of the problems beingencountered and attacked.作者: Antarctic 時(shí)間: 2025-3-28 11:22 作者: VOC 時(shí)間: 2025-3-28 15:35
On Round-Off Errors in Linear Programmingter is still well below the boiling point. The vapor bubbles generated at the bottom of the teapot, being lighter than the liquid, move upward through the nonboiling water. The moment they reach a cooler zone of liquid they collapse vigorously and create cracking noises.作者: Horizon 時(shí)間: 2025-3-28 22:45 作者: 虛假 時(shí)間: 2025-3-28 23:03 作者: 安心地散步 時(shí)間: 2025-3-29 06:52
https://doi.org/10.1007/978-3-642-95126-8e liquid vary with the flow rate. Consequently, centrifugal pumps develop different heads at different flow rates. Similarly, efficiency, power requirements, and suction capability also vary with flow rate.作者: 初學(xué)者 時(shí)間: 2025-3-29 09:38
Performance Characteristics of Centrifugal Pumpse liquid vary with the flow rate. Consequently, centrifugal pumps develop different heads at different flow rates. Similarly, efficiency, power requirements, and suction capability also vary with flow rate.作者: 辯論的終結(jié) 時(shí)間: 2025-3-29 14:21 作者: 填料 時(shí)間: 2025-3-29 17:20 作者: 滔滔不絕地說(shuō) 時(shí)間: 2025-3-29 22:22
Installation, Handling, and Operation of Pumps and Pumping Systemsthat it can develop the head required to overcome the resistance of the system. In this case, one of the following may occur: The flow rate increases gradually until it is restored to the expected value; the flow rate decreases gradually until the pump ceases to deliver any liquid; or the pump operates at the same, reduced, flow rate.作者: LIEN 時(shí)間: 2025-3-30 03:57
Performance Characteristics of Centrifugal Pumps dimensions and shape of the waterways and on the operating speed of the impeller. For a given pump geometry and operating speed, the velocities of the liquid vary with the flow rate. Consequently, centrifugal pumps develop different heads at different flow rates. Similarly, efficiency, power requir作者: 形容詞詞尾 時(shí)間: 2025-3-30 05:29
Classification of Centrifugal Pumpsol, sewage handling and treatment, food industries, chemical and petrochemical industries, process industries (e.g., textiles and leather), domestic appliances, mining and ore processing, transporting liquid-solid mixtures, environmental control, spaceships, airplanes, and motor vehicles. The list c作者: glans-penis 時(shí)間: 2025-3-30 12:00
Effects of Free Air in the Pumped Liquidt of the presence of free air has been discussed earlier in the section on priming (Chapter 1). However, even when a pump has been primed properly, free air can appear during operation and disrupt the performance of the pump.作者: pineal-gland 時(shí)間: 2025-3-30 14:28
Cavitationse in a nonboiling state.” This can be best illustrated by the example of the teapot, when heating water, simmering noises, and cracking are heard long before the water boils. These noises occur when the water in immediate contact with the bottom of the teapot starts to boil while the rest of the wa作者: ENACT 時(shí)間: 2025-3-30 19:27
Cavitation in Centrifugal Pumpss test speed. Other pumps may be too big to test on any available rig, and all tests must be performed on a scale model. In both cases, one must resort to using model laws to estimate whether the pump will perform satisfactorily under actual working conditions.作者: 昏睡中 時(shí)間: 2025-3-30 21:14
