JPS5455803A - Mechanism of automatically throttling inlet portion of impeller - Google Patents

Mechanism of automatically throttling inlet portion of impeller

Info

Publication number
JPS5455803A
JPS5455803A JP12149477A JP12149477A JPS5455803A JP S5455803 A JPS5455803 A JP S5455803A JP 12149477 A JP12149477 A JP 12149477A JP 12149477 A JP12149477 A JP 12149477A JP S5455803 A JPS5455803 A JP S5455803A
Authority
JP
Japan
Prior art keywords
dies
inducer
flow rate
throttle
current
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP12149477A
Other languages
Japanese (ja)
Inventor
Seigo Katsuta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
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
Application filed by Ebara Corp filed Critical Ebara Corp
Priority to JP12149477A priority Critical patent/JPS5455803A/en
Publication of JPS5455803A publication Critical patent/JPS5455803A/en
Pending legal-status Critical Current

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To improve the suction performance of a pump, by installing an automatic throttle mechanism to an inducer vane or just before an impeller inlet, and by providing the mechamism with the throttle action over a low flow rate range and by eliminating the throttle action over a normal flow rate range. CONSTITUTION:When normal flow rate, since current just before an inducer 4 proceeds to the inducer 4 in a uniform condition as shown in the arrow head A, winglike dies 3 turn following the current and are stabilized, thus releasing throttle. Back currents B are generated near the inducer 4 over a low flow rate range, but since the back currents B are created turning in the revolution direction C of a rotary shaft of a pump the currents B push the winglike dies 3 in the lateral direction, the nose portion of the winglike dies 3 center of the revolution of other dies, and mutual dies interfer to prevent the development of the back current B to the upper current side, thus resulting in throttle action. Consequently, the suction performance of the pump can be improved.
JP12149477A 1977-10-12 1977-10-12 Mechanism of automatically throttling inlet portion of impeller Pending JPS5455803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12149477A JPS5455803A (en) 1977-10-12 1977-10-12 Mechanism of automatically throttling inlet portion of impeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12149477A JPS5455803A (en) 1977-10-12 1977-10-12 Mechanism of automatically throttling inlet portion of impeller

Publications (1)

Publication Number Publication Date
JPS5455803A true JPS5455803A (en) 1979-05-04

Family

ID=14812548

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12149477A Pending JPS5455803A (en) 1977-10-12 1977-10-12 Mechanism of automatically throttling inlet portion of impeller

Country Status (1)

Country Link
JP (1) JPS5455803A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129099U (en) * 1982-02-25 1983-09-01 三菱重工業株式会社 Fluid pressure generator
JP2015004363A (en) * 2014-09-04 2015-01-08 東海旅客鉄道株式会社 Adverse wind pressure restraint device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58129099U (en) * 1982-02-25 1983-09-01 三菱重工業株式会社 Fluid pressure generator
JPS6329918Y2 (en) * 1982-02-25 1988-08-10
JP2015004363A (en) * 2014-09-04 2015-01-08 東海旅客鉄道株式会社 Adverse wind pressure restraint device

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