JPS566080A - Axial piston pump - Google Patents
Axial piston pumpInfo
- Publication number
- JPS566080A JPS566080A JP7985479A JP7985479A JPS566080A JP S566080 A JPS566080 A JP S566080A JP 7985479 A JP7985479 A JP 7985479A JP 7985479 A JP7985479 A JP 7985479A JP S566080 A JPS566080 A JP S566080A
- Authority
- JP
- Japan
- Prior art keywords
- orifice
- slit
- pressure
- pressured
- valve plate
- 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
Links
Landscapes
- Reciprocating Pumps (AREA)
Abstract
PURPOSE: To reduce noise by a method wherein between an inlet port and a discharge port of valve plate an orifice and a slit are respectively formed on the valve plate.
CONSTITUTION: At the changing point from an inlet stroke to a discharge stroke a cylinder chamber 8' expands ready to become negative-pressured. However, in order to connect with the adjacent long hole still in the connected condition with the inlet port 6' through a slit 11, the pressure is supplied therefrom to prevent the becoming negative-pressured. After passing the upper dead point the precompression is going to start but at this moment through an orifice 12 the air is partly discharged to the low-pressured side from the notch groove 18 of the external pad part 17 thus to reduce the peak pressure. Thereby by forming the orifice and slit on the valve plate the peak and negative pressure can be eased up preventing the capacitive efficiency degeneration thus to reduce the noise accompanying the pressure change.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7985479A JPS566080A (en) | 1979-06-25 | 1979-06-25 | Axial piston pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7985479A JPS566080A (en) | 1979-06-25 | 1979-06-25 | Axial piston pump |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS566080A true JPS566080A (en) | 1981-01-22 |
Family
ID=13701775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7985479A Pending JPS566080A (en) | 1979-06-25 | 1979-06-25 | Axial piston pump |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS566080A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59107981U (en) * | 1983-01-11 | 1984-07-20 | 三菱重工業株式会社 | Swash plate type axial piston pump |
JPS63178998A (en) * | 1987-01-12 | 1988-07-23 | トウフク株式会社 | Slurry high-pressure force-feed method and device |
WO1994015097A1 (en) * | 1992-12-22 | 1994-07-07 | Kabushiki Kaisha Komatsu Seisakusho | Device for controlling pressure in cylinder chamber of hydraulic pump motor |
WO1996024765A1 (en) * | 1995-02-10 | 1996-08-15 | Daikin Industries, Ltd. | Variable displacement piston machine for reducing noise and vibration by reducing pulsation of discharge fluid |
US5807080A (en) * | 1995-02-10 | 1998-09-15 | Daikin Industries, Ltd. | Variable displacement type piston machine of which noise and vibration are reduced by reducing pulsation of discharge fluid |
US6196109B1 (en) * | 1998-11-16 | 2001-03-06 | Eaton Corporation | Axial piston pump and improved valve plate design therefor |
CN100455800C (en) * | 2005-06-30 | 2009-01-28 | 株式会社川崎精机 | Valve plate and hydraulic apparatus with the same |
-
1979
- 1979-06-25 JP JP7985479A patent/JPS566080A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59107981U (en) * | 1983-01-11 | 1984-07-20 | 三菱重工業株式会社 | Swash plate type axial piston pump |
JPS63178998A (en) * | 1987-01-12 | 1988-07-23 | トウフク株式会社 | Slurry high-pressure force-feed method and device |
WO1994015097A1 (en) * | 1992-12-22 | 1994-07-07 | Kabushiki Kaisha Komatsu Seisakusho | Device for controlling pressure in cylinder chamber of hydraulic pump motor |
US5572919A (en) * | 1992-12-22 | 1996-11-12 | Kabushiki Kaisha Komatsu Seisakusho | Apparatus for controlling pressure in a cylinder chamber of a hydraulic pump-motor |
WO1996024765A1 (en) * | 1995-02-10 | 1996-08-15 | Daikin Industries, Ltd. | Variable displacement piston machine for reducing noise and vibration by reducing pulsation of discharge fluid |
US5807080A (en) * | 1995-02-10 | 1998-09-15 | Daikin Industries, Ltd. | Variable displacement type piston machine of which noise and vibration are reduced by reducing pulsation of discharge fluid |
US6196109B1 (en) * | 1998-11-16 | 2001-03-06 | Eaton Corporation | Axial piston pump and improved valve plate design therefor |
CN100455800C (en) * | 2005-06-30 | 2009-01-28 | 株式会社川崎精机 | Valve plate and hydraulic apparatus with the same |
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