Title:
VARIABLE DISPLACEMENT PISTON MACHINE FOR REDUCING NOISE AND VIBRATION BY REDUCING PULSATION OF DISCHARGE FLUID
Document Type and Number:
WIPO Patent Application WO/1996/024765
Kind Code:
A1
Abstract:
A variable displacement piston machine is provided for reducing noise and vibration by reducing the pulsation of discharge oil by reducing in turn the change in volume of operation fluid flowing from a high pressure port to a low pressure port and a drain. An intermittent drain path (5) is formed in a sliding surface (1a) of a valve plate in such a manner that it does not directly communicate with a high pressure port (3a) and an oil guide groove (4). This intermittent drain path (5) does not communicate with the high pressure port (3a) and a cylinder port (54a) while there is occurring a reverse flow from the high pressure port (3a) to the cylinder port (54a) with the high pressure port (3a) communicating with the cylinder port (54a) via the oil guide groove (4a). When a cylinder block (55) rotates further from that state, the intermittent drain path (5) communicates with the high pressure port (3a) via the cylinder port (54a).
Inventors:
OCHIAI TAKASHI (JP)
MURAKAMI YASUYUKI (JP)
MURAKAMI YASUYUKI (JP)
Application Number:
PCT/JP1996/000238
Publication Date:
August 15, 1996
Filing Date:
February 06, 1996
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
OCHIAI TAKASHI (JP)
MURAKAMI YASUYUKI (JP)
OCHIAI TAKASHI (JP)
MURAKAMI YASUYUKI (JP)
International Classes:
F04B1/20; (IPC1-7): F04B1/20
Foreign References:
| JPS566080A | 1981-01-22 | |||
| JPS597786A | 1984-01-14 | |||
| JPH0495671U | 1992-08-19 |
Other References:
See also references of EP 0756084A4
Download PDF: