Alternativa drosselirovaniyu in urban systems of water supply
Povyisitelnyie pump stations – one of chief users of the name of pipeline armature under the name throttle zaslonka. Restriction of cross-section section of a final path of the pump, reached by means of this detail, osuschestvlet management of the pump which eats from the electric drive and works with constant capacity. However, this rather widespread method has a number of the defects affecting EFFICIENCY of the pump and disseminating a part of spent energy.
Throttle zaslonka can be established on a final path and on a pum input. At throttle installation on an exit the part of kinetic energy of a liquid dissipates on zaslonke, that influences pump EFFICIENCY. Installation zaslonki on a pump input also reduces EFFICIENCY of the pump and non-productive costs of the electric power of a drive as in this case energy of a liquid is spent for overcoming of resistance of a latch and the effective area of shovels of a wheel of the pump, creating a pressure decreases.
Logical consequence described above effects becomes as wear of the detail and the pump equipment. There are by-effects – an overheat of the equipment and a resonance effect. Besides, this method of regulation which, undoubtedly, allows to lower quantity of failures on pipelines, requires presence and the control. As on modern pressure head pipelines of urban water supply the system of the pumps regulated throttle zaslonkoy today is used, non-productive power inputs manage to be lowered, however such system requires difficult regulation and the control.
To regulate work of system of pump units the control of speed of rotation of the driving wheel of each of circular pumps of system depending on indicators of key parametres – productivity, a pressure and capacity allows. Modern systems ASUTP allow to regulate this indicator by means of electronic converters of frequency. The gauge of pressure established on the pressure head pipeline, transmits on the panel the data allowing automatically to change frequency of rotation depending on the cost of water in system of water supply.
The converter of frequency integrated into a control system of the equipment, allows to approach as much as possible electric drive EFFICIENCY in an operating time to a nominal indicator that is especially important as asynchronous electric drives are most comprehensible in operation and repair. Smooth start-up of the engine is besides, possible, that potentially means absence of hydraulic blows, noise level decrease in work. Modernisation of the pump equipment means safe independent work and integration into a control system.
Use of the regulation of the pump described above a method or system of pumps has Rayad significant advantages. Objects with the big daily, seasonal loading give the highest indicators on economy of the electric power, water and even heat. The periods between planned repairs of the equipment increase, the service life and in particular, bearings of pumps increases. It is necessary to notice, that this method more effectively at great volumes of a pumped over liquid and is absolutely not necessary at work of one pump for example, on a country house chink.
The information is prepared by company Neftegazkomplekt
The catalogue of pipeline armature www.tpsystem.ru
It is introduced: on December, 14th, 2007
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