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Matches 501 - 550 out of 3,457

Document Document Title
JP2012207546
To provide a pump power consumption characteristic model in consideration of non-linearity and multi-valued feature of power consumption characteristics with respect to a flow rate, and a change of the power consumption characteristic ac...  
JP2012197795
To provide a horizontal shaft pump (a double-suction horizontal shaft pump or self-balance multistage horizontal shaft pump) which has vane wheels disposed symmetrically, makes a radial load borne by a hydrostatic bearing, and effectivel...  
JP2012193585
To provide a water distribution pressure control apparatus which is capable of highly accurately controlling terminal pressure of a water distribution pipe network.A water distribution pressure control system includes a duct resistance m...  
JP2012188943
To provide a water supply device that can detect an abnormal state of a CPU.The water supply device includes: pumps 3-1, 3-2 for supplying water; a pressure detector 8 for detecting water pressure at a discharge side of the pump to outpu...  
JP2012177304
To provide a configuration, by which semiconductor components inside a controller are cooled by air and the controller is manufactured at low cost.The controller 3 is arranged in the rear of a cylindrical fan cover 29 which covers a moto...  
JP2012172565
To improve pump efficiency by lengthening effective lengths of blades of an impeller, and attract a bearing by magnetic attractive force to prevent reflux from suction to discharge.In a pump 110, a liquid sucking direction X and a liquid...  
JP2012154186
To provide a bypass energy recovery device of a fluid machine that can improve the total efficiency of the machine by effectively utilizing a pressure-loss amount of fluid energy in a pressure-loss mechanism.In a multistage centrifugal p...  
JP2012154286
To provide a water supply device capable of easily setting a parameter required for performing end pressure constant control.A target pressure setting means of the water supply device operates an electric motor at a variable speed by a v...  
JP2012149529
To provide a drainage pump for an air conditioner, achieving a smaller occupied space in the air conditioner by eliminating the need to externally mount a sensor, etc. for detecting a drainage water level.A motor part 10 is supported by ...  
JP2012149649
To improve stall-resistant characteristics of a pump to be used, to provide the pump with characteristics more resistant to stall, and to combine constant shaft power with rotation speed to enable stable operation over a wider operation ...  
JP2012144976
To provide an abnormality detection method of a pressure tank which can accurately detect the abnormality of the pressure tank such as decrease in the charged pressure, and a water supply device with an abnormality detection function for...  
JP2012127360
To provide a pump installation having improved reliability, safety and economic efficiency by shortening the time for stating a horizontal shaft pump to allow quick start of draining operation.The pump installation 1 including the horizo...  
JP2012117371
To provide a pump device that can detect the rotational direction of a pump without depending on visual confirmation, and can rotate the pump in a positive direction.The pump device comprises the pump P, a motor M, an inverter 12, and a ...  
JP2012112363
To provide a water supply device capable of stabilizing a water supply pressure when renewing a target pressure of terminal pressure constant control (or discharge pressure constant control).In the water supply device including a pump co...  
JP2012101136
To provide a fire pump system which can steadily and effectively work under unfavorable conditions when a disaster occurs.The fire pump system includes a motor-driven pump 10 for feeding water, a plurality of discharging means 50 mounted...  
JP2012087688
To provide a pump control device, which is capable of reducing a variation rate of an actual flow rate with respect to a target flow rate of a pump device during a low flow rate, while a control of the pump device is simplified.A pump co...  
JP2012082688
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...  
JP2012077684
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...  
JP2012077701
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...  
JP2012072697
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...  
JP2012052440
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...  
JP2012026376
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...  
JP2012002231
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...  
JP2012002197
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...  
JP2011256769
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...  
JP2011256810
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...  
JP2011247163
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...  
JP2011214534
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...  
JP2011214442
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...  
JP2011202525
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...  
JP2011202509
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...  
JP2011202524
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...  
JP2011185190
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...  
JP2011176946
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...  
JP2011163298
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...  
JP2011157949
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...  
JP2011157894
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...  
JP2011137406
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 ...  
JP2011127460
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 ...  
JP2011111982
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...  
JP2011111983
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...  
JP2011112277
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...  
JP2011094563
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...  
JP2011080858
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...  
JP2011066088
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...  
JP2011064113
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 ...  
JP2011056401
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...  
JP2011038513
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 ...  
JP2011017346
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...  
JP2010276006
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...  

Matches 501 - 550 out of 3,457