JPS56151295A - Geared pump or motor - Google Patents

Geared pump or motor

Info

Publication number
JPS56151295A
JPS56151295A JP5580580A JP5580580A JPS56151295A JP S56151295 A JPS56151295 A JP S56151295A JP 5580580 A JP5580580 A JP 5580580A JP 5580580 A JP5580580 A JP 5580580A JP S56151295 A JPS56151295 A JP S56151295A
Authority
JP
Japan
Prior art keywords
figures
rate
change
area
state
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.)
Granted
Application number
JP5580580A
Other languages
Japanese (ja)
Other versions
JPS6345513B2 (en
Inventor
Masahiro Tsunemi
Yuji Kondo
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.)
Nabco Ltd
Original Assignee
Nabco Ltd
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 Nabco Ltd filed Critical Nabco Ltd
Priority to JP5580580A priority Critical patent/JPS56151295A/en
Publication of JPS56151295A publication Critical patent/JPS56151295A/en
Publication of JPS6345513B2 publication Critical patent/JPS6345513B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Rotary Pumps (AREA)
  • Hydraulic Motors (AREA)

Abstract

PURPOSE: To eliminate the generation of noises by keeping locked-up parts at the same state when the difference in the rate of change of the capacity between the parts during the rotation of a gear is small, connecting the same to an intake side and a discharge side on any other occasions thereby preventing generation of extraordinary pressure.
CONSTITUTION: When a state of engagement shown in the upper picture comes to a state of engagement shown in the lower picture, figures S1 and S2 are intercepted from both discharge groove 12 and intake groove 15. And, when rotation starts to advance from the lower picture, the rate of the change in an area to a rotational angle between the figures S1 and S2 turns gradual increase in the rate of change in the area of the figure S2, and when the rate of change in the area between the figures S1 and S2 is extremely small, the tips 25 and 23 of the 2nd and 3rd small grooves 16 and 17 are opened in the figures S1 and S2. Therefore, extraordinary high pressure and low pressure are not caused in the figures S1 and S2 and thus the noises caused thereby are not generated.
COPYRIGHT: (C)1981,JPO&Japio
JP5580580A 1980-04-25 1980-04-25 Geared pump or motor Granted JPS56151295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5580580A JPS56151295A (en) 1980-04-25 1980-04-25 Geared pump or motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5580580A JPS56151295A (en) 1980-04-25 1980-04-25 Geared pump or motor

Publications (2)

Publication Number Publication Date
JPS56151295A true JPS56151295A (en) 1981-11-24
JPS6345513B2 JPS6345513B2 (en) 1988-09-09

Family

ID=13009130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5580580A Granted JPS56151295A (en) 1980-04-25 1980-04-25 Geared pump or motor

Country Status (1)

Country Link
JP (1) JPS56151295A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002332973A (en) * 2001-05-07 2002-11-22 Komatsu Ltd Groove shape of gear pump side plate
US20080166254A1 (en) * 2006-09-28 2008-07-10 Martin Jordan Hydraulic device
US8011910B2 (en) * 2005-02-22 2011-09-06 Limo-Reid, Inc. Low noise gear set for gear pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002332973A (en) * 2001-05-07 2002-11-22 Komatsu Ltd Groove shape of gear pump side plate
JP4726324B2 (en) * 2001-05-07 2011-07-20 株式会社小松製作所 Groove shape of side plate of gear pump
US8011910B2 (en) * 2005-02-22 2011-09-06 Limo-Reid, Inc. Low noise gear set for gear pump
US20080166254A1 (en) * 2006-09-28 2008-07-10 Martin Jordan Hydraulic device
US8512018B2 (en) * 2006-09-28 2013-08-20 Trw Automotive Gmbh Gear pump with pressure relief groove

Also Published As

Publication number Publication date
JPS6345513B2 (en) 1988-09-09

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