• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1374523 Fluid-pressure servomotor systems FUJITSU Ltd 19 Jan 1972 [29 Jan 1971] 2493/72 Heading G3P Safety valves I are provided in the supply circuit 10, 11 of a hydraulic motor 14 connected by a feedback mechanism 13 to a pilot valve 5 operated by an electrical stepping motor 3. The valves relieve excess pressure if the motor 14 continues to rotate after the pilot valve has closed. Each valve 1 consists of a spring-biased piston 17 which opens a by-pass passage 20 in the wall of a cylinder 16 to allow excess pressure to be relieved either into the supply conduit 8 for the valve 5 or into a return conduit 9.
    公开号:SU745378A3
    申请号:SU721742021
    申请日:1972-01-28
    公开日:1980-06-30
    发明作者:Инаба Сейюмон；Симизу Канрио；Ито Кохеи；Амемия Юити；Гамо Готаро
    申请人:Фудзицу Лимитед (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the field of hydraulic drive and can be used in torque hydraulic boosters to stabilize the pressure and discharge of hydraulic motors. A torque hydraulic actuator containing a hydraulic motor, communicated by two underwater hydraulic lines with a throttling hydraulic distributor, is made known in case 1. The disadvantage of the known hydraulic distributor the hydraulic booster is - its reliability is not high due to the absence of devices for unloading the hydraulic booster with an unacceptable increase in pressure. The purpose of the invention is to increase the reliability of the power booster. This goal is achieved by the fact that the housing has kangsha for communication of subsea hydrolines with pressure hydroline, each cylinder having a safety valve in the form of a cylinder with a spring-loaded piston and inlet and outlet openings connected by a bypass channel and overlapping pistons. In FIG. 1 shows the torque booster in section; in fig. 2 - safety valve. The torque booster contains a stepper motor 1 connected to electrical input 2 and connected via gearbox 3 to the shank 4 of a throttling valve in the form of a spool 5 seconds. The second threaded shank 6 of the spool 5 is connected to the screw sleeve 7 of the output shaft 8 of the hydraulic engine 9. The throttling valve, also containing the sleeve 10 with windows, is hydraulically connected by the underwater hydraulic lines 11 and 12 to the hydraulic engine 9, as well as to the pressure 13 and drain 14 the hydraulic lines made in the housing 15. The pressure hydrolines 13 are connected to the underwater hydraulic lines 11 and 12 by channels 16 and 17, respectively, and the same safety valves 18 and 19 are installed in each of the safety valves (see Fig. 2) a housing in the form of a cylinder 20 in which a piston 22 is spring-loaded 21 and an inlet 23 and outlet 24, as well as a bypass canal connecting 25 connecting them, are provided.
    Power moment works as follows
    When an electrical signal is applied to the electrical input, the 2-step electric motor 1, through the gearbox 3, causes the rotation of the valve 5, which, thanks to the casing: the threaded shank 6 / located in the screw sleeve 7, moves axially in one direction or the other, depending on the direction of rotation of the electric motor 1 When the spool 5 is displaced from the neutral position of the window in the sleeve 7, the working fluid flows from the pressure source into the pressure hydroline 13 and further into the underwater hydrolines 11 or 12 depending on from the direction of displacement of the spool 5, the hydraulic motor 9 is actuated, after which the working fluid enters the drainage line 14. When the hydraulic motor 9 operates, its output shaft 8 rotates and through the screw sleeve 7 causes axial movement of the spool 5, returning it to the neutral position at which the window in the sleeve 10 is closed and the hydraulic motor 9 is stopped.
    With an unacceptable increase in pressure of the working fluid in the underwater hydrolines 11 and 12 of the hydraulic engine 9, the pressure in the channels 16 and 17, in which the safety valves 18 and 19 are installed, also rises, and is transmitted through the inlet 23 to the piston 22. Because the pressure in the hydraulic line 13 always Constantly, the pressure acting through the outlet 24 on the piston 22 from the side of the spring 21 is less than the pressure in the subsea hydrolines 11
    745378
    and 12, as a result of which the piston 22 will start to move, compressing the spring 21 until the bypass channel 25 opens, through which part of the tee from the inlet 23 flows to the outlet 24, the hydraulic motor 9 n throttles the distributor from unacceptable loads.
    At the reverse of the stepper motor 1 and, accordingly, the hydraulic motion of the bodies 9, the power booster works in a similar way.
    The invention makes it possible to eliminate unacceptable loads on the hydraulic booster elements and to increase its reliability.
    权利要求:
    Claims (1)
    [1]
    1. Ermakov V.V. Hydraulic drive of metal-cutting machine tools. M., 40 Mashgiz, 1963, p. 253-254, FIG. 133.
    yr 23
    2
    类似技术:
    公开号 | 公开日 | 专利标题
    US2799995A|1957-07-23|Power transmission
    US2984215A|1961-05-16|Controller for fluid pressure operated devices
    GB1294700A|1972-11-01|Improvements in or relating to hydraulically operated servo systems, particularly for vehicle power steering systems
    GB1396439A|1975-06-04|Hydraulic steering limitation means for hydrostatic steering installations more particularly for motor vehicles
    US3481147A|1969-12-02|Hydraulic power system
    US3253662A|1966-05-31|Controlled torque tool
    US2669935A|1954-02-23|Hydraulically actuated shift control for hydraulic pumps
    SU745378A3|1980-06-30|Momentum hydroamplifier
    US4437388A|1984-03-20|Dual input pressure compensated fluid control valve
    US2493512A|1950-01-03|Power transmission
    US4986382A|1991-01-22|Power assistance for vehicle steering mechanisms
    US3696613A|1972-10-10|Hydraulic steering system having auxiliary power source
    GB1118443A|1968-07-03|Improvements in or relating to hydrostatic transmissions
    US3928969A|1975-12-30|Self-monitored fluid pressure booster system
    SU833151A3|1981-05-23|Hydraulic steering gear of transport device
    US3446021A|1969-05-27|Power steering unit with poppet directional control valves
    US3333416A|1967-08-01|Hydraulic steering system
    US3570523A|1971-03-16|Self-regulating reciprocator device
    GB911401A|1962-11-28|Improvements in or relating to a servo system
    US4421010A|1983-12-20|Steering gear for motor vehicles
    US3406703A|1968-10-22|Pulsating hydraulic control
    US3592236A|1971-07-13|Dual-input servo valve
    US2502234A|1950-03-28|Control for hydraulic motors
    SU1301968A1|1987-04-07|Apparatus for automatic overload protection of working member of mining machine
    US3241317A|1966-03-22|Hydrostatic transmission servo valve
    同族专利:
    公开号 | 公开日
    JPS526794Y2|1977-02-12|
    IT948949B|1973-06-11|
    DE2204186B2|1974-09-19|
    GB1374523A|1974-11-20|
    FR2123528B1|1974-09-13|
    CH533771A|1973-02-28|
    FR2123528A1|1972-09-08|
    JPS473198U|1972-09-02|
    US4031811A|1977-06-28|
    DE2204186A1|1972-08-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2598180A|1952-05-27|ken yon |
    US2395671A|1940-09-26|1946-02-26|Douglas Aircraft Co Inc|Control means for airfoils|
    US3006323A|1957-07-25|1961-10-31|Alco Valve Co|Hydraulic servo power valve with manually operable safety provisions|
    US3158068A|1961-12-28|1964-11-24|Conair|Hydraulic actuator and control unit|
    DE1550180B1|1966-03-26|1970-01-29|Danfoss As|Safety valve arrangement for a hydraulic system|
    CH511480A|1968-11-21|1971-08-15|Fujitsu Ltd|Control device for an electro-hydraulic pulse motor|US4503888A|1983-10-04|1985-03-12|Mts Systems Corporation|Servovalve spool control for digital rotary servovalve|
    JP2003148404A|2001-11-07|2003-05-21|Teijin Seiki Co Ltd|Electro-hydraulic motor and hydraulic driving method|
    US7043907B2|2002-07-11|2006-05-16|Nabtesco Corporation|Electro-hydraulic actuation system|
    US6996982B2|2003-12-09|2006-02-14|The United States Of America As Represented By The Administrator Of The Environmental Protection Agency|Method and device for switching hydraulic fluid supplies, such as for a hydraulic pump/motor|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP333771U|JPS526794Y2|1971-01-29|1971-01-29|
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