SU1273649A1

SU1273649A1 - Device for estimating wear of pump slot packing

Info

Publication number: SU1273649A1
Application number: SU853929181A
Authority: SU
Inventors: Вячеслав Алексеевич Ким
Priority date: 1985-07-11
Filing date: 1985-07-11
Publication date: 1986-11-30

Abstract

Изобретение относитс к области гидромашиностроени и может быть использовано при эксплуатации центробежных насосов. Изобретение позвол ет повысить точность диагности .ровани износа зттлотнени путем исключени вли;1ни на Нее изменений режима работы насоса. Величины перетечек перекачиваемой среды, проход щих через отверсти 2 и 6 к измерительным приборам 4 и 5, завис т от толщины неподвижного уплотнительного кольца 1. В процессе износа кольца I его толщина уменьшаетс и, следовательно , площадь входного сечени отверсти 2 увеличиваетс . Величина потока через цилиндрическое, отверстие 6 практически не измен етс . Отношение потоков жидкости через коническое и цилиндрическое отверсти 2 и 6, регистрируемое приборами 4 и 3, принимаетс за показатель износа. Око зависит только от сопротивлений отверстий 2 и 6 .и остаетс посто н ным при изменении режима работы насоса . 1 ил. СО О) 4; ;оThe invention relates to the field of hydraulic engineering and can be used in the operation of centrifugal pumps. The invention makes it possible to increase the accuracy of diagnostics of wear and tear wear by eliminating the influence of her on changes in the mode of operation of the pump. The overflows of the pumped medium passing through the openings 2 and 6 to the measuring instruments 4 and 5 depend on the thickness of the fixed sealing ring 1. During the wear process of the ring I, its thickness decreases and, consequently, the area of the inlet section of the opening 2 increases. The flow through the cylindrical hole 6 is almost unchanged. The ratio of fluid flows through the conical and cylindrical holes 2 and 6, recorded by the devices 4 and 3, is taken as a measure of wear. The eye depends only on the resistances of the holes 2 and 6.. And remains constant when the pump operation mode changes. 1 il. CO O) 4; ;about

Description

Изобретение относится к гидромашиностроению, конкретно к наcoco- ;The invention relates to hydraulic engineering, specifically to coco-;

строению и эксплуатации центробежных насосов.the structure and operation of centrifugal pumps.

Цель изобретения - повышение точности диагностирования износа уплотнения путем исключения влияния на нее изменений режима работы насоса.The purpose of the invention is to increase the accuracy of diagnosing seal wear by eliminating the influence of changes in the pump operating mode on it.

На чертеже схематически представлено устройство, общий вид.The drawing schematically shows a device, General view.

Устройство для определения износа щелевого уплотнения насоса содержит неподвижное уплотнительное кольцо 1 с радиальным коническим отверстием 2, обращенным своей узкой стороной к уплотняемой щели 3 и сообщенным с измерительным прибором 4.A device for determining wear of a slotted seal of a pump comprises a stationary sealing ring 1 with a radial conical hole 2 facing its narrow side to the sealing gap 3 and in communication with the measuring device 4.

Устройство дополнительно снабжено вторым измерительным прибором 5, а в неподвижном уплотнительном кольце 1 выполнено радиальное цилиндрическое отверстие 6, сообщенное с дополнительным измерительным прибором 5. В трубопроводах 7, сообщающих отверстия 2 и 6 с измерительными приборами 4 и 5, могут быть установлены запорные элементы 8.The device is additionally equipped with a second measuring device 5, and in the stationary sealing ring 1 a radial cylindrical hole 6 is made, communicated with an additional measuring device 5. In the pipelines 7, connecting holes 2 and 6 with measuring devices 4 and 5, shut-off elements 8 can be installed.

Предлагаемое устройство работает следующим образом.The proposed device operates as follows.

Открываются запорные элементы 8, и протечки перекачиваемой среды направляются через отверстия 2 и 6 и трубопроводы 7 к измерительным приборам 4 и 5, В процессе износа неподвижного кольца 1 толщина его уменьшается, а следовательно, площадь входного сечения отверстия 2 на неподвижном кольце 1 увеличивается, вследствие чего увеличивается количество протечек. Величина потока 5 через цилиндрическое отверстие 6 практически не изменяется вследствие того, что площадь входного сечения остается постоянной. Отношение потоков жидкости через коническое и цилиндрическое отверстия 2 и 6, регистрируеьые измерительными приборами 4 и 5, принимается за показатель износа. Оно зависит только от сопротивлений 2 и 6 и остается постоян· •5 ным при измененном режиме работы насоса.The locking elements 8 are opened, and the leaks of the pumped medium are directed through the openings 2 and 6 and the pipelines 7 to the measuring devices 4 and 5. In the process of wear of the fixed ring 1, its thickness decreases, and therefore, the inlet cross-sectional area of the hole 2 on the fixed ring 1 increases, due to which increases the number of leaks. The magnitude of the flow 5 through the cylindrical hole 6 is practically unchanged due to the fact that the inlet cross-sectional area remains constant. The ratio of fluid flows through the conical and cylindrical openings 2 and 6, recorded by measuring instruments 4 and 5, is taken as an indicator of wear. It depends only on resistances 2 and 6 and remains constant · • 5 constant when the pump operation mode is changed.

Claims

1 The invention relates to hydraulic engineering, specifically to the design and operation of centrifugal pumps. The purpose of the invention is to improve the accuracy of diagnosing seal wear by eliminating the effect of changes in the pump operation mode. The drawing shows schematically the device, a general view. A device for determining wear of a slit seal of a pump comprises a stationary sealing ring 1 with a radial conical opening 2, with its narrow side facing the sealing gap 3 and communicating with the measuring device 4. The device is additionally equipped with a second measuring device 5, and in a stationary sealing ring 1 a radial cylindrical bore 6 communicated with an additional measuring device 5. In pipes 7, connecting holes 2 and 6 with measuring devices 4 and 5, there may be a bore The locking elements are installed 8. The proposed device operates as follows. The locking elements 8 are opened, and the leaks of the pumped medium are directed through openings 2 and 6 and pipelines 7 to measuring devices 4 and 5. During the wear process of the fixed ring 1, its thickness decreases, and consequently, the area 649 of the inlet section of opening 2 on the fixed ring 1 increases, thereby increasing the number of leaks. The flow through the cylindrical bore 6 is almost unchanged due to the fact that the inlet section area remains constant. The separation of the flow of fluid through the conical and cylindrical bores 2 and 6, recorded by measuring instruments 4 and 5, is taken as a measure of wear. It depends only on resistances 2 and 6 and remains constant when the pump is changed. Apparatus of the Invention A device for determining wear of a slit seal of a pump, comprising a stationary sealing ring with a radial conical bore, with its narrow side facing the sealable gap and communicated with a measuring device, characterized in that, in order to improve the accuracy of diagnosis of seal wear by eliminating the effect it changes the mode of operation of the pump, it is equipped with an additional measuring device, and in a fixed sealing ring there is a radial cylindrical shape Erste, reported with an additional measuring device.