JPS54138265A - Method of and apparatus for controlling operation of constant-output hydraulic hoist - Google Patents
Method of and apparatus for controlling operation of constant-output hydraulic hoistInfo
- Publication number
- JPS54138265A JPS54138265A JP4538578A JP4538578A JPS54138265A JP S54138265 A JPS54138265 A JP S54138265A JP 4538578 A JP4538578 A JP 4538578A JP 4538578 A JP4538578 A JP 4538578A JP S54138265 A JPS54138265 A JP S54138265A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- constant
- pressure
- circuit
- pump
- 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
Links
Abstract
PURPOSE: To improve stability of control circuit, by detecting pressure and acceleration speed as deviation operated signal for controlling the swash plate angle of motor, and controlling the swash plate angle of motor in proportion to the integral value of effective pressure difference and deviation to a desired value.
CONSTITUTION: Load is wound upward by operating variable displacement pump 11 driven by AC motor 10 and supplying pressure oil to variable displacement motor 12. Brake valve 13 is connected to a relief valve at the high pressure side of the circuit and to the outlet port of booster pump 14 for augmenting the oil loss in a closed circuit. Variable displacement motor 12 is provided with regulator 15 for changing the swash plate angle so as to control pressure difference in the circuit. Maximum oil discharging rate of pump 14 is constant independently for the load since supply output of pump is proportional to the product of pressure P and oil discharging rate QP and rotational speed of AC motor 10 is constant. Therefore, if displacement of motor Dm is controlled to keep pressure P constant independently of load, a constant-output hydraulic circuit equivalent to the Ward Leonard system.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4538578A JPS54138265A (en) | 1978-04-19 | 1978-04-19 | Method of and apparatus for controlling operation of constant-output hydraulic hoist |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4538578A JPS54138265A (en) | 1978-04-19 | 1978-04-19 | Method of and apparatus for controlling operation of constant-output hydraulic hoist |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54138265A true JPS54138265A (en) | 1979-10-26 |
JPS6153318B2 JPS6153318B2 (en) | 1986-11-17 |
Family
ID=12717790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4538578A Granted JPS54138265A (en) | 1978-04-19 | 1978-04-19 | Method of and apparatus for controlling operation of constant-output hydraulic hoist |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54138265A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0033239A2 (en) * | 1980-01-25 | 1981-08-05 | Aquila Steel Company Limited | Crane hydraulic control system |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63194120U (en) * | 1987-06-03 | 1988-12-14 | ||
JPH0437058Y2 (en) * | 1987-06-03 | 1992-09-01 | ||
JPS63194121U (en) * | 1987-06-03 | 1988-12-14 | ||
JPH0528184Y2 (en) * | 1987-11-24 | 1993-07-20 | ||
JPH0343421U (en) * | 1989-09-08 | 1991-04-23 | ||
EP0819646A4 (en) * | 1995-03-10 | 2000-01-05 | Komatsu Mfg Co Ltd | Method and system for controlling the speed of a winch |
CN105570215B (en) * | 2016-03-17 | 2017-07-28 | 上海振华重工(集团)股份有限公司 | A kind of identical tension hydraulic valve bank |
-
1978
- 1978-04-19 JP JP4538578A patent/JPS54138265A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0033239A2 (en) * | 1980-01-25 | 1981-08-05 | Aquila Steel Company Limited | Crane hydraulic control system |
Also Published As
Publication number | Publication date |
---|---|
JPS6153318B2 (en) | 1986-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS63285302A (en) | Hydraulic drive system | |
GB2087521A (en) | Hydrostatic transmission control | |
JPS54138265A (en) | Method of and apparatus for controlling operation of constant-output hydraulic hoist | |
EP0670426A4 (en) | Circuit capable of varying pump discharge volume in closed center-load sensing system. | |
FI112791B (en) | Method and apparatus for saving electrical energy in a hydraulic lift actuator | |
JPS5543245A (en) | Volume controller of variable hydraulic pump | |
JPS5543246A (en) | Volume controller of variable hydraulic pump | |
JPS5569782A (en) | Output-power controller for pumps | |
JPS646501A (en) | Control apparatus for load sensing hydraulic drive circuit | |
EP0587043A3 (en) | Method and arrangement for control and regulation of a pressure generator for several different hydraulic consumers connected in parallel. | |
JPS60154900A (en) | Oil pressure generator | |
US4545201A (en) | Control arrangements for regulating the speed of a hydrostatic energy consumer | |
JPS5775833A (en) | Method and apparatus for preventing overload in injection device | |
GB1462232A (en) | Apparatus including a regulation device for regulating the load driven by a prime mover | |
JPS5566201A (en) | Controller of cargo handling equipment for battery operated vehicle | |
JPS54128808A (en) | Control method for gas booster or the like | |
GB2087050A (en) | Hydrostatic Transmission Control System | |
JPS6422773A (en) | Controller for hydraulic elevator | |
JPS6421201A (en) | Device for restricting vibration of boom in hydraulic working machine | |
JPS55116932A (en) | Controling method of hydraulic shovel | |
JPS57153979A (en) | Limiting control method and device for input horsepower into hydraulic pump | |
JPS5740156A (en) | Pressure control device in oil pressure circuit | |
JPS5519904A (en) | Discharge flow control equipment of variable capacity pump | |
SU686979A1 (en) | Jib lifting mechanism hydraulic drive of self-propelled crane | |
JPS5768536A (en) | Fuel injection timing regulator |