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types of pumps//المضخات

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    الصورة الرمزية حسن هادي
    حسن هادي
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    types of pumps//المضخات

    يهدف هذا الموضوع لتسليط الاضواء حول المضخات وانواعها وذلك لكي نسهل على الاخوة الاعضاء عملية البحث وذلك من خلال ادراج المواضيع والروابط المدعومة بالصور عسى ان يكون عملا حسنا ///ومن الله التوفيق
    ************************************************** ******


  2. [2]
    حسن هادي
    حسن هادي غير متواجد حالياً
    عضو متميز
    الصورة الرمزية حسن هادي


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    والان نبدأ بالتعاريف و سرد المعلومات والتفاصيل*
    ****************************************
    A pump is a device used to move liquids or slurries. A pump moves liquids from lower pressure to higher pressure, and overcomes this difference in pressure by adding energy to the system (such as a water system). A gas pump is generally called a compressor, except in very low pressure-rise applications, such as in heating, ventilating, and air-conditioning, where the operative equipment consists of fans or blowers.
    Pumps work by using mechanical forces to push the material, either by physically lifting, or by the force of compression.
    The earliest type of pump was the Archimedes screw, described by Archimedes in the 3rd century BC, but used earlier by Sennacherib, King of Assyria, in the 7th century BC.[1] In the 13th century AD, al-Jazari described and illustrated different types of pumps, including reciprocating pumps, double acting pumps with suction pipes, water pumps, and pistons.[2][3]

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  3. [3]
    حسن هادي
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    عضو متميز
    الصورة الرمزية حسن هادي


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    [ Types


    A two-lobe pump (multiple rotor, positive displacement type)


    Pumps fall into two major groups: rotodynamic pumps and positive displacement pumps. Their names describe the method for moving a fluid. Rotodynamic pumps are based on bladed impellors which rotate within the fluid to impart a tangential acceleration to the fluid and a consequent increase in the energy of the fluid. The purpose of the pump is to convert this energy into pressure energy of the fluid to be used in the associated piping system.

    [edit] Positive displacement pumps


    A lobe pump



    Hand-operated, reciprocating, positive displacement, water pump in Košice-Ťahanovce, Slovakia (walking beam pump).


    A positive displacement pump causes a liquid to move by trapping a fixed amount of fluid and then forcing (displacing) that trapped volume into the discharge pipe. Positive displacement pumps can be further classified as either rotary-type (for example the rotary vane or Lobe pumps similar to oil pumps used in car engines). Another common type is the Wendelkolben pump or the helical twisted Roots pump. The low pulsation rate and gentle performance of this Roots-type positive displacement pump is achieved due to a combination of its two 90° helical twisted rotors, and a triangular shaped sealing line configuration, both at the point of suction and at the point of discharge. This design produces a continuous and non-vorticuless flow with equal volume. High capacity industrial "air compressors" have been designed to employ this principle as well as most "supercharges" used on internal combustion engines.
    Reciprocating-type pumps use a piston and cylinder arrangment with suction and discharge valves integrated into the pump. Pump arrangements are from "simplex" one cylinder to in some cases four (quad) or more but usually are "duplex" two or "triplex" 3 cylinder. Furthermore they are either "single acting" independant suction and discharge strokes or "double acting" suction and discharge in both directions. The pumps can be powered by air, steam or through a belt drive from an engine or motor. This type of pump was used extensively in the early days (1800's) of steam propulsion as boiler feed water pumps. Though still used today reciprocating pumps are typically used for pumping highly viscous fluids including concrete and heavy oils. Another modern application of positive displacment pumps are diaphragm pumps commonly called "Sand Piper Pumps" and are used extensivley for dewatering and generally use compressed air as a motive source of energy.


    [edit] Centrifugal Pumps

    Centrifugal Pumps are rotodynamic pumps which convert Mechanical energy into Hydraulic energy by centripetal force on the liquid. Typically, a rotating impeller increases the velocity of the fluid. The casing, or volute, of the pump then acts to convert this increased velocity into an increase in pressure. So if the mechanical energy is converted into a pressure head by centripetal force, the pump is classified as centrifugal. Such pumps are found in virtually every industry, and in domestic service in developed countries for washing machines, dishwashers, swimming pools, and water supply.
    A wide range of designs are available, with constant and variable speed drives. Horizontal shafts are the most common. Single-stage pumps are usual in the smaller ratings. Pumps with up to 11 stages are in service. A demanding duty is boiler feed, and today's designs are typically 3 - 4 stage, with speeds of up to 6000 r/min.
    After motors, centrifugal pumps are arguably the most common machine, and they are a significant user of energy. Given design margins, it is not unusual for a pump to be found to be over-sized, having been selected poorly for its intended duty. Running a constant speed pump throttled causes energy waste. A condition monitoring test can detect this condition and help size a smaller impeller, either new, or by machining the initial one, to achieve great energy reduction.
    Pumps also wear internally, at a rate varying with the liquid pumped, materials of construction and operating regime. Again, condition monitoring can be applied to detect and quantify the extent and rate of wear and also help decide when overhaul is justified on an energy-saving basis.

    [edit] Kinetic Pumps

    1. Continuous energy addition
    2. Conversion of added energy to increase in kinetic energy (increase in velocity)
    3. Conversion increased velocity to increase in pressure
    4. Conversion of Kinetic head to Pressure Head.
    5. Meet all heads like Kinetic , Potential, and Pressure

    [edit] Positive Displacement

    1. Periodic energy addition
    2. Added energy forces displacement of fluid in an enclosed volume
    3. Fluid displacement results in direct increase in pressure

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  4. [4]
    حسن هادي
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    An airlift pump is a simple pump which is powered by compressed air. Typically, the compressed air is pumped down a pipe into a well and bubbles into another larger diameter pipe. The air bubbles return to the surface in the larger pipe. A fizzy spurting flow of air and water results. Airlift pumps are often used in deep dirty wells where sand would quickly abrade mechanical parts. (The compressor is on the surface and no mechanical parts are needed in the well). However airlift wells must be much deeper than the water table to allow for submergence. Air is generally pumped at least as deep under the water as the water is to be lifted. (If the water table is 50 ft below, your air should be pumped 100 feet deep).

    وعلى هذا النمط من التوضيح ندرج روابط الانواع ادناه
    Airlift pump
    Beam pump and walking beam pump
    Bicycle pump
    Boiler feedwater pump
    Breast pump
    Centrifugal pump
    Chain pumps
    Circulator pump
    Concrete pump
    Condensate pump
    Cyclic pump
    Diving pump
    Eductor-jet pump
    Electropump
    Fire pump and Jockey pump
    Gas compressors
    Gerotor
    Hand pump
    Hydraulic ram
    Metering pump
    Oil pump
    Peristaltic pump
    Progressive cavity pump (also known as; progressing cavity, eccentric screw or Mono pump)
    Pumping station
    Pumpjack (oil pump)
    Rope pump
    Roundabout PlayPump
    Tesla turbine
    Treadle pump
    Turbopump
    Vacuum pump
    Well water pump
    Wind pump

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  5. [5]
    شكرى محمد نورى
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    مشرف


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    وسام الاشراف

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    الأخ حسن هادي .

    تحية طيبة .

    جهوك كيبرة تشكر عليها . واختيارك للمواضيع المميزة عمل رائع ومثمر .

    اعانك الله وجزاك خير جزاء لما تبذله في سبيل المنفعة والفائدة للاخرين .

    مجهود لايثمن .

    البغدادي .

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  6. [6]
    حسن هادي
    حسن هادي غير متواجد حالياً
    عضو متميز
    الصورة الرمزية حسن هادي


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    اقتباس المشاركة الأصلية كتبت بواسطة شكرى محمد نورى مشاهدة المشاركة
    الأخ حسن هادي .

    تحية طيبة .

    جهوك كيبرة تشكر عليها . واختيارك للمواضيع المميزة عمل رائع ومثمر .

    اعانك الله وجزاك خير جزاء لما تبذله في سبيل المنفعة والفائدة للاخرين .

    مجهود لايثمن .

    البغدادي .
    الاخ العزيز وفقك الله وهذه تحية اعتز بها *ووفقك الله ووفقنا لخدمة اخواننا والله ولي التوفيق
    اخوكم حسن العراقي

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  7. [7]
    shery1
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    عضو


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    جزاك الله خيرا

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  8. [8]
    shery1
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    شكرا ...............................

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  9. [9]
    eaaaazizo
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    شكرا على هذا المجهود الرائع

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  10. [10]
    حسن هادي
    حسن هادي غير متواجد حالياً
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    الصورة الرمزية حسن هادي


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    شكرا لجميع الاخوة الاعضاء على مرورهم وارجو ان يكون الموضوع مفيدا

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