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1. 发明专利

JPH05196001A FLOW RATE AND PRESSURE CONTROL DEVICE FOR SERVOMOTOR DRIVE HYDRAULIC PUMP 失效
公开(公告)号：JPH05196001A
公开(公告)日：1993-08-06
申请号：JP677592
申请日：1992-01-17
申请人： TOKIMEC INC
发明人： NAKAO HIROTOSHI , SHIMOMURA YASUO
IPC分类号： F15B9/00 , F04B49/06
摘要： PURPOSE:To provide smooth control switching without any hunting phenomenon by providing a closed loop system for flow rate control and a closed loop system for pressure control, and by inputting to an amplifier the smaller one out of outputs from compensating elements of respective closed loop control system for switching each of closed loop systems. CONSTITUTION:This device comprises an F/V converter (a flow rate detecting means) 25 for converting flow rate to a voltage corresponding to the number of revolutions of a servomotor 22 for driving a hydraulic pump 21, and also a flow rate and pressure compensating part 30 formed alongside a hydraulic pump part 20 provided with a pressure sensor 26 for detecting a discharge pressure of the hydraulic pump 21. Deviation between an instructed value of flow rate and a detected value of flow rate and deviation between an instructed value of pressure and a detected value of pressure are detected by means of respective deviation detecting parts 31 and 32, and the deviations are input to an amplifier 23 through the first and the second compensating elements 33 and 34 for having flow rate control or pressure control carried out. That is, only the output having a smaller absolute value out of outputs from respective compensating elements 33 and 34 is input to the amplifier 23 through a control system switching circuit 35 for switching the closed loop systems.

2. 实用新型

JPS591875Y2 JPS591875Y2 - 失效
公开(公告)号：JPS591875Y2
公开(公告)日：1984-01-19
申请号：JP5425275
申请日：1975-04-19
IPC分类号： F15B9/09 , B60T13/66 , B60T13/74 , F15B9/00 , F16D65/28 , G01M17/007 , G01M17/04

3. 发明专利

JPS5821284B2 失效
公开(公告)号：JPS5821284B2
公开(公告)日：1983-04-28
申请号：JP14505775
申请日：1975-12-08
申请人： HITACHI LTD
发明人： HIRAI HIROTAKE
IPC分类号： F15B9/09 , F15B9/00 , G05B11/36 , G05D3/00 , G05D3/12 , G05D19/02

4. 发明专利

JPS5819882B2 失效
公开(公告)号：JPS5819882B2
公开(公告)日：1983-04-20
申请号：JP14477177
申请日：1977-12-01
申请人： ISHIKAWAJIMA HARIMA HEAVY IND
发明人： HARADA EIICHI , SUGYAMA HITOSHI
IPC分类号： F15B9/09 , F15B9/00

5. 发明专利

JPS5819504B2 失效
公开(公告)号：JPS5819504B2
公开(公告)日：1983-04-18
申请号：JP11747875
申请日：1975-09-29
申请人： JIDOSHA KIKI CO
发明人： ABE TOSHIHIRO , KONISHI HIDEO
IPC分类号： B62D6/02 , B62D5/06 , F15B9/00

6. 发明专利

JPS5747069B2 失效
公开(公告)号：JPS5747069B2
公开(公告)日：1982-10-07
申请号：JP3507275
申请日：1975-03-24
IPC分类号： B62D5/08 , B62D5/06 , B62D5/24 , F15B9/00

7. 发明专利

JPS5537641B2 失效
公开(公告)号：JPS5537641B2
公开(公告)日：1980-09-29
申请号：JP14007675
申请日：1975-11-21
IPC分类号： F15B9/09 , F15B9/00

8. 实用新型

JPS55134501U 失效
公开(公告)号：JPS55134501U
公开(公告)日：1980-09-24
申请号：JP3309979
申请日：1979-03-16
IPC分类号： F15B9/09 , F15B9/00

9. 实用新型

JPS5521897Y2 失效
公开(公告)号：JPS5521897Y2
公开(公告)日：1980-05-26
申请号：JP7963775
申请日：1975-06-11
IPC分类号： B62D5/087 , B62D5/06 , B62D5/24 , F15B9/00

10. 发明专利

JPS5540363A OIL HYDRAULIC CONTROL DEVICE 失效
公开(公告)号：JPS5540363A
公开(公告)日：1980-03-21
申请号：JP11443978
申请日：1978-09-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： KUWABARA KOUJI
IPC分类号： F15B9/09 , F15B9/00
摘要： PURPOSE:To reduce distortation of acceleration wave-form by compensating non- linearity in a servo valve with such a construction as providing a linearizer between servo valve and servo amplifier. CONSTITUTION:Between a servo valve 3 and a servo amplifier 2 is provided a linearizer, in which the characteristics of a servo valve 4 are measured previously by a subtractor 18, a generator for constant 19, a potentiometer 20, adder 21, multiplier 22, and a square root extractor 16 on the basis of the pressure at oil pressure source, the differential pressure at actuator, and the input amperage to servo valve and the servo valve flow-in factor, which is a function of input signal to servo valve, shall be calculated with a non-linear floded-line function generator 14, which is adjusted in such a way that it can reproduce those characteristics mentional above, and further the flow rate presumed through the above procedure is emitted from a multiplier 15, and finally the output from the servo amplifier 2 is subtrated by this presumed flow rate at an adder and subtractor 11 to be amplified by an amplifier 12,. Thus non-linearity in a servo valve can be compensated and distortion of acceleration wave-form can be reduced.

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