RU99124601A - HYDRAULIC EQUIPMENT - Google Patents

HYDRAULIC EQUIPMENT

Info

Publication number
RU99124601A
RU99124601A RU99124601/06A RU99124601A RU99124601A RU 99124601 A RU99124601 A RU 99124601A RU 99124601/06 A RU99124601/06 A RU 99124601/06A RU 99124601 A RU99124601 A RU 99124601A RU 99124601 A RU99124601 A RU 99124601A
Authority
RU
Russia
Prior art keywords
frequency
hydraulic equipment
frequency converter
flow rate
current
Prior art date
Application number
RU99124601/06A
Other languages
Russian (ru)
Other versions
RU2193697C2 (en
Inventor
Макото Кобайаши
Масакацу ЙАМАМОТО
Йошио Мийяке
Каору Йаги
Кейта Уваи
Йошиаки МИЙАЦАКИ
Катсужи Иижима
Original Assignee
Эбара Корпорейшн
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP12356097A external-priority patent/JP3922760B2/en
Application filed by Эбара Корпорейшн filed Critical Эбара Корпорейшн
Publication of RU99124601A publication Critical patent/RU99124601A/en
Application granted granted Critical
Publication of RU2193697C2 publication Critical patent/RU2193697C2/en

Links

Claims (10)

1. Гидравлическое оборудование для выработки давления путем вращения рабочего колеса с помощью двигателя, содержащее: преобразователь частоты для подачи электроэнергии на двигатель; детектор для детектирования частоты и величины тока; и программу, заранее определяющую зависимость между частотой и величиной тока; причем частота и величина тока при реальной работе сравниваются со значениями, определенными программой, а частота, вырабатываемая упомянутым преобразователем частоты, изменяется так, что рабочая точка гидравлического оборудования приближается к значению, определенному программой.1. Hydraulic equipment for generating pressure by rotating the impeller using an engine, comprising: a frequency converter for supplying electricity to the engine; a detector for detecting the frequency and magnitude of the current; and a program predetermining the relationship between frequency and magnitude of the current; moreover, the frequency and magnitude of the current during actual operation are compared with the values determined by the program, and the frequency generated by the mentioned frequency converter is changed so that the operating point of the hydraulic equipment approaches the value determined by the program. 2. Гидравлическое оборудование по п.1, в котором упомянутое гидравлическое оборудование относится к такому типу, в котором мощность вала увеличивается при увеличении скорости потока при постоянной скорости вращения, а скоростью потока гидравлического оборудования управляют так, чтобы поддерживать ее практически постоянной даже тогда, когда изменяется вырабатываемое давление. 2. The hydraulic equipment according to claim 1, wherein said hydraulic equipment is of the type in which the shaft power increases with increasing flow rate at a constant rotational speed, and the flow rate of the hydraulic equipment is controlled so that it is practically constant even when the generated pressure changes. 3. Гидравлическое оборудование по п.1, в котором упомянутое гидравлическое оборудование относится к такому типу, в котором мощность вала уменьшается при увеличении скорости потока при постоянной скорости вращения, а вырабатываемым давлением управляют так, чтобы поддерживать его практически постоянным даже тогда, когда изменяется скорость потока. 3. The hydraulic equipment according to claim 1, wherein said hydraulic equipment is of the type in which the shaft power decreases with increasing flow rate at a constant speed of rotation, and the pressure generated is controlled so as to maintain it practically constant even when the speed changes flow. 4. Гидравлическое оборудование по п.1, в котором частота (Гц) и сила тока (А) связаны однозначной функцией и запрограммированы. 4. The hydraulic equipment according to claim 1, in which the frequency (Hz) and current strength (A) are connected by an unambiguous function and programmed. 5. Гидравлическое оборудование по п. 4, в котором зависимость между упомянутой частотой (Гц) и упомянутой величиной тока (А) выражается как А=К • Гц2 (где К и n представляют собой положительные константы).5. The hydraulic equipment according to claim 4, wherein the relationship between said frequency (Hz) and said current value (A) is expressed as A = K • Hz 2 (where K and n are positive constants). 6. Гидравлическое оборудование по п.5, в котором упомянутый преобразователь частоты имеет средство для изменения значений К и n. 6. The hydraulic equipment according to claim 5, wherein said frequency converter has means for changing the values of K and n. 7. Насосная установка, содержащая: центробежный насос, приводимый в действие трехфазным индуктивным двигателем; преобразователь частоты для подачи электроэнергии на упомянутый трехфазный индуктивный двигатель; детектор в упомянутом преобразователе частоты для детектирования частоты и величины тока; и программу, определяющую зависимость между частотой и величиной тока, хранимую упомянутым преобразователем частоты; причем частота и величина тока при реальной работе сравниваются со значениями, определенными программой, а частота, вырабатываемая упомянутым преобразователем частоты, изменяется так, что рабочая точка насоса приближается к значению, определенному программой, а скоростью потока управляют так, чтобы поддерживать ее практически постоянной, даже тогда, когда изменяется напор упомянутого насоса. 7. A pump installation comprising: a centrifugal pump driven by a three-phase inductive motor; a frequency converter for supplying electricity to said three-phase inductive motor; a detector in said frequency converter for detecting the frequency and magnitude of the current; and a program defining a relationship between the frequency and the magnitude of the current stored by said frequency converter; moreover, the frequency and magnitude of the current during actual operation are compared with the values determined by the program, and the frequency generated by the aforementioned frequency converter changes so that the operating point of the pump approaches the value determined by the program, and the flow rate is controlled so as to maintain it almost constant, even then when the pressure of said pump changes. 8. Насосная установка по п.7, в которой упомянутая насосная установка имеет функцию для перемножения времени, выданного из упомянутого преобразователя частоты, на величину постоянной скорости потока, чтобы тем самым вычислить скорость потока. 8. The pump installation according to claim 7, in which said pump installation has a function for multiplying the time output from said frequency converter by a constant flow rate in order to thereby calculate a flow rate. 9. Насосная установка по п. 8, в которой упомянутый преобразователь частоты содержит индикатор для скорости потока. 9. The pump installation of claim 8, wherein said frequency converter comprises an indicator for flow rate. 10. Насосная установка по п.8, в которой с помощью функции памяти упомянутого преобразователя частоты упомянутая насосная установка может автоматически работать для выполнения задачи доставки определенного количества воды за каждый определенный период времени в течение нескольких следующих друг за другом дней, остановки выполнения этой задачи на определенное количество следующих друг за другом дней, и выполнения этой задачи в течение определенного количества следующих друг за другом дней. 10. The pump installation of claim 8, in which, using the memory function of said frequency converter, said pump installation can automatically operate to perform the task of delivering a certain amount of water for each specific period of time for several consecutive days, stopping the execution of this task for a certain number of consecutive days, and completing this task within a certain number of consecutive days.
RU99124601/06A 1997-04-25 1998-04-22 Hydraulic equipment RU2193697C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9-123560 1997-04-25
JP12356097A JP3922760B2 (en) 1997-04-25 1997-04-25 Fluid machinery

Publications (2)

Publication Number Publication Date
RU99124601A true RU99124601A (en) 2001-08-20
RU2193697C2 RU2193697C2 (en) 2002-11-27

Family

ID=14863618

Family Applications (1)

Application Number Title Priority Date Filing Date
RU99124601/06A RU2193697C2 (en) 1997-04-25 1998-04-22 Hydraulic equipment

Country Status (10)

Country Link
US (1) US6350105B1 (en)
EP (1) EP0978657B1 (en)
JP (1) JP3922760B2 (en)
KR (1) KR100533699B1 (en)
CN (1) CN1268847C (en)
AU (1) AU722386B2 (en)
DE (1) DE69822808T2 (en)
ID (1) ID24674A (en)
RU (1) RU2193697C2 (en)
WO (1) WO1998049449A1 (en)

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