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Matches 551 - 600 out of 3,491

Document Document Title
JP2012082688A
To achieve a high pumping efficiency in a wide flow rate range.A drive control device of an electric pump includes a pump for supplying a dynamic pressure to a fluid by rotating an impeller, and a motor serving as a rotation drive source...  
JP2012077684A
To provide a highly reliable pump apparatus having a simple apparatus constitution and capable of reliably executing the start and the continuous operation of a pump without stopping a prime mover to a large fluctuation of the water suct...  
JP2012077701A
To automatically measure pump characteristics without stopping operation of a water treatment plant facility.A control device 10 monitors whether a pumping amount q and an average rotation speed n of suction pumps P1-PN are within prescr...  
JP2012072697A
To provide a centrifugal pump unit capable of generating sufficient negative pressure in a case.In this centrifugal pump unit 10, a delivery nozzle 45 is arranged in an upper part 38 of the case 33, an impeller 23 is rotatably arranged i...  
JP2012052440A
To achieve prevention or mitigation of a surging phenomenon of a suction water tank and reduction of a load of power supply equipment, while equalizing a discharge operation time of each pump, without increasing the scale of a pump stati...  
JP2012026376A
To provide an overheating protection system of a pump that has a thin pipe diameter and a short bypass pipe, and that prevents a temperature of liquid from increasing at low cost and effectively.The overheating protection system 20 of th...  
JP2012002231A
To provide a system and method of determining a centrifugal turbomachinery remaining life.A centrifugal turbomachine 10 includes an impeller 16 and a speed sensor 22 arranged to detect a speed associated with an impeller speed. The speed...  
JP2012002197A
To provide an automatic operation device of a non-automatic operation type electric pump capable of immediately responding to a liquid level, by an automatic operation device of a non-automatic operation type electric pump which eliminat...  
JP2011256769A
To provide horizontal shaft pump equipment capable of suppressing starting current of an electric motor serving as a driving machine, completing a water filling process in a short time, and allowing a draining operation at an early stage...  
JP2011256810A
To provide a vertical shaft pump having a structure simple and easy in an installation work and capable of effectively cleaning a suction tank in a controlled operation.Vertical pipes 21A, 21B branched from T-shaped pipes 19A, 19B connec...  
JP2011247163A
To provide a pump device capable of highly reliability forming a self-siphon and performing siphon destruction at a low equipment cost using a simple piping system in which an electrically-operated valve requiring control is not required...  
JP2011214534A
To enhance discharge performance in low-speed rotation of a water pump and to reduce the discharge performance in high-speed rotation, and to prevent a reduction in the discharge performance by other members.An impeller in the water pump...  
JP2011214442A
To avoid a state of insufficient pressure with an inverter pump, and to save energy by eliminating operations of an extra number of secondary pumps.A secondary pump reduction function 14B by lowering an inverter output is provided in a c...  
JP2011202525A
To prevent occurrence of failure when an operation mode is changed from a manual mode to an automatic mode.A number control part 14, when the operation mode is changed from the manual mode to the automatic mode, determines whether or not...  
JP2011202509A
To provide a high specific-speed pump in which an axial power in a small water volume area during a cutout operation or the like is reduced despite a simple structure.The axial-flow pump P includes a spindle 2 rotatably disposed in a cas...  
JP2011202524A
To always obtain target capacity without concentrating a load at a specific water suction pump.A control part 35 controls the total discharge capacity of a plurality of water suction pumps P1-P8 to the target capacity by repeatingly perf...  
JP2011185190A
To provide an efficient control device integrated type motor pump.The control device integrated type motor pump includes a pump 1, a motor 2 driving the pump 1, a control device 3 controlling the motor 2, and a discharge side pressure me...  
JP2011176946A
To provide a motor device that reduces load on a switching element, and also reduces power consumption, and to provide a pump with the motor device.The motor device 1 includes, a rotor 2, a stator 3 that drives the rotor 2, the switching...  
JP2011163298A
To provide a water feeding pump control device and a water feeding pump control method, which reduce leakage of tap water stored in water supply equipment when leakage occurs by a disaster in the water supply equipment and fire extinguis...  
JP2011157949A
To prevent both of delay in start of drainage and hunting operation, in a drainage pump installed to a suction water tank in which water flowing over a mount flows from the upstream.Pumps 4A-4E are installed to the suction water tank 5 i...  
JP2011157894A
To provide a method and device for predicting a cavitation erosion quantity in a fluid machine, enabling easy prediction of the cavitation erosion quantity.The method includes mounting a vibration acceleration sensor on the fluid machine...  
JP2011137406A
To provide a status diagnosis system and method for a cargo pump, which diagnose the status of the secular change in the cargo pump without opening a cargo handling tank while monitoring the status of the cargo pump, and also provide an ...  
JP2011127460A
To provide a water supply device which prevents the occurrence of water hammer when a pump is started for the first time after the water supply device is stopped for a long period.This water supply device 1 includes: the pump P; a motor ...  
JP2011111982A
To provide reduction of the installation cost of a water level detecting means, reduction of installation man-hours, enhancement of operability, standardization and commonization on a plurality of water level control and functions.A wate...  
JP2011111983A
To provide a water level control system of a water supply pump system, improving problems by parameterizing respective threshold values of operation and stop of water level control and function according to the water level of a water sou...  
JP2011112277A
To perform change control of a set differential pressure and a set water supply pressure without causing problems even in a system having both an inverter pump and a constant-speed pump.A lower limit set value change function of inverter...  
JP2011094563A
To provide a highly reliable pump facility and an operating method, by preventing turbulence of a flow near an intake port caused by back-flow in a suction part, smoothly sucking air therein to shorten the starting time, and thereby impr...  
JP2011080858A
To provide a full water level detector provided with a countermeasure against rusty water that can be equipped to a pump installed outdoors.In a body housing 10, an air passage and an electrode bar chamber 12 including two or more electr...  
JP2011066088A
To provide a function for assuring circulation of an etchant by effectively removing the gas, generated from the etchant, from within an injection line and an injection pump, while using a pump of blade water pump type which does not cau...  
JP2011064113A
To provide an automatic pressure tank type pump that replenishes air into a pressure tank when an inching occurs.An automatic pressure tank type pump 1 includes a pump head 6, a pressure tank 10 that accumulates water pressurized by the ...  
JP2011056401A
To reduce power consumption by controlling speed of rotation of a pump while maintaining the water level of the tank of water treatment equipment in a fixed range.The water treatment equipment includes at least two tanks for storing wate...  
JP2011038513A
To provide a fluid control system disposed at a predetermined distance from a fluid transfer apparatus, in relation generally to control of fluid transport systems, and more particularly, to methods and apparatus for channeling water to ...  
JP2011017346A
To provide a pump device performing estimated terminal pressure constant control without causing insufficient water supply or insufficient water supply pressure.This pump device includes: a pump 310; a pressure detection means 323 detect...  
JP2010276006A
To solve problems of conventional water supply secondary pump number control in which since the number control is performed by a system using a two-position regulator by load flow measurement or by use of a number control controller, att...  
JP2010275688A
To provide a boost water supply system for high-rise building operating a plurality of variable speed pumps arranged in parallel and driven by an electric motor controlled by variable voltage-variable frequency power supply and controlli...  
JP2010261338A
To provide a boost water supply unit preventing seizing of a pump, used for a direct connection type boost water supply device at its second stage or thereafter.The boost water supply unit includes: a pressurizing pump; a check valve; a ...  
JP2010261339A
To provide a boost water supply device generating no periodic fluctuation of pressure.A pressure tank is connected to piping on the intake side of a pressurizing pump. A flow rate adjusting part is provided between the pressure tank and ...  
JP2010261386A
To provide a pump device capable of easily controlling the discharge amount of each of a left heart blood pump and a right heart blood pump as a blood pump for an artificial heart.An upper rotor 5a above a stator 4 and a lower rotor 5b b...  
JP2010254281A
To save cost, space, and energy and labor for operation and maintenance in the entire engine cooling device of a ship.Pumps 21 including a pump of two-suction port type and a cooler-related devices 51G, 51J are disposed on the lower/uppe...  
JP2010242730A
To provide a pump device and a method accurately managing a vibration tendency of a pump.This invention relates to the pump device for pumping up liquid in a suction water tank. This pump device has a pump having a rotary shaft 6, an imp...  
JP2010242511A
To provide a general purpose pump device simply preventing an extreme drop of pumpage to the occurrence of cavitation.If characteristics of motor rotation speed Nm and pump operation current value Im which are peculiar for occurrence of ...  
JP2010242521A
To provide a pump which prevents the complication of an internal structure and manufacturing process and the enlargement of a body size, and which can determine pump service life.The pump 1 consists of a rotor 3 equipped with a magnet 31...  
JP2010236498A
To provide a control device for a manhole pump device that prevents the occurrence of foreign matter tangling in an impeller and blocking inside a pump casing by accumulating without increasing a starting frequency, and a control method ...  
JP2010229859A
To provide a water supply device preventing pressure on a secondary side of a water supply pump from becoming excessive.The water supply device 1 includes a plurality of pump units respectively connected to a branch pipe branching off a ...  
JP2010216288A
To provide a parallel-off control method and system for a parallel pump, in which N(N≥2) units of variable speed pumps driven by a variable voltage and a variable frequency power source are constituted so as to execute parallel operati...  
JP2010209698A
To provide an energy saving control device for a cooling facility pump capable of quickly controlling a flow rate and the pressure of fluid to a required value.The energy saving control device includes the pump, a main pipe connected to ...  
JP2010201325A
To provide a method of controlling a pure water supply system, by which even if total consumption of pure water varies at a use point, a load of a water supply pump is reduced, with energy consumption curtailed, and to provide a pure wat...  
JP2010192317A
To provide a miniaturizable liquid level detector having high reliability, preventing contact malfunction.A float switch 10 includes a float case 28, a magnet 32 housed in the float case 28 and functioning as a magnetic part operable in ...  
JP2010174841A
To provide a water feed device that is highly efficient while maintaining reliability by operating in consideration of a limit load current value of a pump.In the water feed device including the pump rotated and driven by a motor, a vari...  
JP2010174536A
To provide a stable and highly-reliable booster water supply system saving energy, by preventing a decrease in water supply pressure, hunting, etc. from occurring in a zone or local area of a partial story, and preventing an excessive op...  

Matches 551 - 600 out of 3,491