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- Industrial equipment: pumping
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- 2. 1. Read and translate the international words Element, biological, chemicals, irrigation, pharmaceutical, viscosity, compression, rotodynamic, rotary,
- 3. 3. Match the English word combinations in column A to their Russian equivalents in column B
- 4. 4. Read and translate Pumps are the essential element in any flow system. Pumps work by
- 5. Similarly, the gear pump (Fig. 10.1) traps a fixed quantity in the space between adjacent teeth
- 6. 5. Decide whether the statements below are true or false according to the information in exercise
- 7. 6. Read and translate Вихревой насос В вихревых насосах для передачи энергии от рабочего колеса к
- 8. 8. Find the English equivalents for the following phrases
- 9. 9. Find the Russian equivalents for the following phrases
- 10. 10. Answer the questions What is the practical application of pumps? What types of pumps do
- 11. 11. Read and translate 1. A pump is a device used to move fluids, such as
- 12. 12. Read and translate 1.Насос – гидравлическая машина, служащая для перемещения и создания напора жидкостей и
- 14. Скачать презентацию
1. Read and translate the international words
Element, biological, chemicals, irrigation, pharmaceutical, viscosity, compression,
1. Read and translate the international words
Element, biological, chemicals, irrigation, pharmaceutical, viscosity, compression,
2. Read and translate the verbs
To transfer, to convert, to deliver, to utilize, to push, to increase, to cause, to create, to trap, to relate, to work, to avoid, to install, to achieve, to use, to convert, to vary, to classify, to give, to impart.
3. Match the English word combinations in column A to their Russian equivalents
3. Match the English word combinations in column A to their Russian equivalents
4. Read and translate
Pumps are the essential element in any flow system. Pumps
4. Read and translate
Pumps are the essential element in any flow system. Pumps
Rotodynamic pumps are based on bladed impellers which rotate within the fluid to impart a tangential acceleration to the fluid and a consequent increase in the energy of the fluid. 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 of the pump then acts to convert this increased velocity into an increase in pressure.
A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing that trapped volume into the discharge pipe. Positive displacement pumps can be further classified as either rotary-type or lobe pumps similar to oil pumps used in car engines. For example, in piston pump the swept volume created by piston movement is the quantity delivered by the pump for each piston stroke, and total flow rate is related to the number of strokes per unit time.
Similarly, the gear pump (Fig. 10.1) traps a fixed quantity in the space
Similarly, the gear pump (Fig. 10.1) traps a fixed quantity in the space
Fig. 10.1 Gear pump
5. Decide whether the statements below are true or false according to the
5. Decide whether the statements below are true or false according to the
Rotodynamic pumps are based on bladed impellers which rotate within the fluid to impart a tangential acceleration to the fluid and a consequent increase in the energy of the fluid.
One of the types of positive displacement pumps is a rotodynamic pump which converts mechanical energy into hydraulic energy by centripetal force on the liquid.
The total flow rate of piston pump is the quantity delivered by the pump for each piston stroke.
Typically, a rotating impeller decreases the velocity of the fluid.
Pumps are used for pumping liquids that vary widely in viscosity.
6. Read and translate
Вихревой насос
В вихревых насосах для передачи энергии от рабочего колеса
6. Read and translate
Вихревой насос
В вихревых насосах для передачи энергии от рабочего колеса
Струйный насос
Перекачка жидкости в струйных насосах осуществляется с помощью кинетической энергии другой жидкости, которую называют рабочей. В качестве рабочей жидкости очень часто применяют пар или воду. Рабочая жидкость поступает с большой скоростью из сопла через камеру смешения в диффузор, увлекая перекачиваемую жидкость. Такие насосы часто используются для подачи воды в паровые котлы.
Шестеренчатый насос
В корпусе шестеренчатого насоса заключены две шестерни. Когда зубья шестерен выходят из зацепления, образуется разряжение и происходит всасывание жидкости. Она поступает в корпус, захватывается зубьями шестерен и перемещается вдоль стенок корпуса в направлении вращения. Когда зубья вновь входят в зацепление, жидкость вытесняется и поступает в напорный трубопровод.
8. Find the English equivalents for the following phrases
8. Find the English equivalents for the following phrases
9. Find the Russian equivalents for the following phrases
9. Find the Russian equivalents for the following phrases
10. Answer the questions
What is the practical application of pumps?
What types of pumps
10. Answer the questions
What is the practical application of pumps?
What types of pumps
What is the operation principle of a rotodynamic pump?
What are the main components of a positive displacement pump?
What do you need to know for a correct pump selection?
11. Read and translate
1. A pump is a device used to move fluids, such
11. Read and translate
1. A pump is a device used to move fluids, such
2. Pumps fall into five major groups: direct lift, displacement, velocity, buoyancy and gravity pumps.
3. Positive displacement rotary pumps are pumps that move fluid using the principles of rotation.
4. A plunger pump consists of a cylinder with a reciprocating plunger in it.
5. Fluid is pumped around the outer periphery by being trapped in the tooth spaces.
6. One modern application of positive displacement diaphragm pumps is compressed-air-powered double-diaphragm pumps.
7. Rotodynamic pump is a type of velocity pump in which kinetic energy is added to the fluid by increasing the flow velocity.
8. This increase in energy is converted to a gain in potential energy when the velocity is reduced prior to or as the flow exits the pump into the discharge pipe.
9. A screw centrifugal pump typically has an operating efficiency of 70% to 85%.
10. Because of the wide variety of applications, pumps have a plethora of shapes and sizes: from very large to very small, from handling gas to handling liquid, from high pressure to low pressure, and from high volume to low volume.
12. Read and translate
1.Насос – гидравлическая машина, служащая для перемещения и создания напора
12. Read and translate
1.Насос – гидравлическая машина, служащая для перемещения и создания напора
2.В основном насосы делятся на два основных типа: объемные и динамические.
3.Объемные насосы используются для перекачки вязких жидкостей.
4.Динамические насосы подразделяются на лопастные, осевые, вихревые и струйные.
5.Рабочим органом в лопастных насосах служит лопастное колесо.
6.Перемещение жидкости в струйных насосах осуществляется за счет энергии потока вспомогательной жидкости, пара или газа.
7.КПД вихревого насоса обычно не превышает 45%.
8.Насосы и насосные станции нашли широкое применение в нефтяной промышленности.
9.Основной параметр насоса – количество жидкости, перемещаемое в единицу времени.
10.Выбор соответствующего типа насоса очень важен для успешной работы всего технологического процесса.