Введение
Диафрагменный насос (также известный как мембранный насос) – это насос с положительным вытеснением, использующий комбинацию возвратно-поступательного движения резиновой, термопластичной или тефлоновой диафрагмы и соответствующих клапанов с обеих сторон диафрагмы (обратных клапанов, дисковых заслонок, клапанов-заслонок или любых других запорных клапанов) для перекачки жидкости. Существует три основных типа диафрагменных насосов:
A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm
(check valve, butterfly valves, flap valves, or any other form of shut off valves) to pump a fluid. There are three main types of diaphragm pumps:
Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non return check valves prevent reverse flow of the fluid. Those employing volumetric positive displacement where the prime mover of the diaphragm is electro mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air. Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant. An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.
Те, в которых диафрагма герметично установлена, с одной стороны контактируя с перекачиваемой жидкостью, а с другой – с воздухом или гидравлической жидкостью. Диафрагма изгибается, изменяя объем камеры насоса. Пара обратных клапанов предотвращает обратный поток жидкости.
A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm
(check valve, butterfly valves, flap valves, or any other form of shut off valves) to pump a fluid. There are three main types of diaphragm pumps:
Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non return check valves prevent reverse flow of the fluid. Those employing volumetric positive displacement where the prime mover of the diaphragm is electro mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air. Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant. An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.
Те, использующие объемное положительное вытеснение, где рабочим органом диафрагмы является электромеханический привод, работающий через кривошипно-шатунный или зубчатый механизм, либо чисто механический, например, рычаг или рукоятка. Этот метод изгибает диафрагму посредством простого механического воздействия, при этом одна сторона диафрагмы открыта для воздуха.
A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm
(check valve, butterfly valves, flap valves, or any other form of shut off valves) to pump a fluid. There are three main types of diaphragm pumps:
Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non return check valves prevent reverse flow of the fluid. Those employing volumetric positive displacement where the prime mover of the diaphragm is electro mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air. Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant. An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.
Те, использующие одну или несколько негерметичных диафрагм, с обеих сторон которых находится перекачиваемая жидкость. Диафрагма(ы) изгибаются, изменяя объем. Когда объем камеры любого типа насоса увеличивается (диафрагма поднимается), давление снижается, и жидкость всасывается в камеру. Когда давление в камере впоследствии увеличивается из-за уменьшения объема (диафрагма опускается), ранее всасываемая жидкость выталкивается. Наконец, диафрагма, поднимаясь, снова всасывает жидкость в камеру, завершая цикл. Это действие аналогично работе цилиндра в двигателе внутреннего сгорания. Диафрагменные насосы обеспечивают герметичное уплотнение между приводным механизмом и компрессионной камерой, позволяя перекачивать, сжимать и откачивать среду без использования смазки. Эластомерная диафрагма может использоваться как универсальное динамическое уплотнение, устраняющее многие ограничения, присущие другим методам уплотнения. Они не протекают, обладают низким трением и могут быть сконструированы для работы с низким давлением. При правильном выборе материала диафрагмы могут обеспечивать герметичность в широком диапазоне давлений и температур без смазки и обслуживания.
A diaphragm pump (also known as a Membrane pump) is a positive displacement pump that uses a combination of the reciprocating action of a rubber, thermoplastic or teflon diaphragm and suitable valves on either side of the diaphragm
(check valve, butterfly valves, flap valves, or any other form of shut off valves) to pump a fluid. There are three main types of diaphragm pumps:
Those in which the diaphragm is sealed with one side in the fluid to be pumped, and the other in air or hydraulic fluid. The diaphragm is flexed, causing the volume of the pump chamber to increase and decrease. A pair of non return check valves prevent reverse flow of the fluid. Those employing volumetric positive displacement where the prime mover of the diaphragm is electro mechanical, working through a crank or geared motor drive, or purely mechanical, such as with a lever or handle. This method flexes the diaphragm through simple mechanical action, and one side of the diaphragm is open to air. Those employing one or more unsealed diaphragms with the fluid to be pumped on both sides. The diaphragm(s) again are flexed, causing the volume to change. When the volume of a chamber of either type of pump is increased (the diaphragm moving up), the pressure decreases, and fluid is drawn into the chamber. When the chamber pressure later increases from decreased volume (the diaphragm moving down), the fluid previously drawn in is forced out. Finally, the diaphragm moving up once again draws fluid into the chamber, completing the cycle. This action is similar to that of the cylinder in an internal combustion engine. Diaphragm Pumps deliver a hermetic seal between the drive mechanism and the compression chamber, allowing the pump to transfer, compress, and evacuate the medium without a lubricant. An elastomeric diaphragm can be used as a versatile dynamic seal that removes many of the limitations found with other sealing methods. They do not leak, offer little friction, and can be constructed for low pressure sensitivity. With the right material consideration, diaphragms can seal over a wide range of pressures and temperatures without needing lubrication or maintenance.
Компрессоры воздуха
Небольшие механически активируемые диафрагменные насосы также используются как воздушные компрессоры и для создания слабого вакуума. По сравнению с другими конструкциями, диафрагменные компрессоры отличаются тихой работой, низкой ценой и отсутствием движущихся частей в потоке воздуха. Это позволяет использовать их без дополнительной смазки, контактирующей с воздухом, что гарантирует чистоту сжатого воздуха. Типичным примером является воздушный насос для аквариума.