• 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:
    The invention allows to expand the range of control of the distributor. Each non-return valve 14 and 15 is made up of a distributor fixed in the housing 1, fixedly mounted plunger 16 with seals 17 having axial and radial channels (K) 18 and 19, and the ball 20 forming the subvalvate with the body, and with the plunger 16 — the over-valve cavity 21 and 22 and the K 18 installed with the possibility of overlapping. The spool 10 is made in the form of a hollow cylinder, the internal cavity of which is divided into chambers 23 and 24 s. input and output mi K 25-28, having u
    公开号:SU1714224A1
    申请号:SU837773239
    申请日:1983-12-22
    公开日:1992-02-23
    发明作者:Аугустин Леитер
    申请人:Зтс Вызкумны Устав Ставебных А Земних Стройу (Инопредприятие)；
    IPC主号:
    专利说明:

    unloading grooves 29 and 30. A spring-loaded plunger 31 is installed in each chamber with the formation of spring and end cavities 32 and 33, which communicate with pressure head K 4 in one of the extreme positions of the spool. The cavities 21 through the slots communicate with K 4 in one of the spool positions. Cameras m. either made in the form of boreholes in the spool, or in the form of additionally installed pipes 34 and 35 in the cylinder. This embodiment allows the pressure loss to be kept constant between K 4 and when the position of the spool changes.
    the internal cavity of the valve, thereby controlling the flow of working fluid to the actuator 9, depending on the opening of the K25 and the cross section of the K4. The distributor is applicable to all types of liquid distribution, in which it is necessary to regulate the flow, and consequently, the speed of the actuator, regardless of the load, and where several movements should be controlled at the same time, and especially in cases where it is necessary to control the flow of fluid from the consumer, 2 h, para. f-ly, 3 ill.
    The invention relates to mechanical engineering, namely to distribution means with controlled flows independent of the load.
    Known valve designs with controlled flows, independent of the load, are equipped with a valve, control /; liquid flow only towards the actuator. The disadvantages of the known distributors is that a special valve must be used to control the flow of fluid from the actuator, for example, when lowering loads or when braking.
    In addition, these valves have a narrow control range.
    The purpose of the invention is to expand the range of regulation.
    The goal is achieved by the fact that the valve, comprising a housing having openings for connecting additional valves with a pressure channel and communication channels communicating with the actuator, a spool mounted in the bore of the IC housing; an adjacent parallel valve with two control channels in one of the spool positions is equipped with two non-return valves, each of which is designed as a distributor placed in the housing, fixedly mounted plunger with seals having axially interconnected th and radial channels, and the ball, forming with the body of the perforated, and with the plunger-valve over the valve, and the opening of the entire omnipotence, blocking the axial channel of the plunger. In this case, the spool has the form of a hollow cylinder, in which the internal cavity is divided into two chambers with inlet and outlet channels with unloading slots, and in each chamber
    there is a loaded plunger forming a spring cavity and an end cavity in communication with the pressure channel in one of the extreme positions of the spool.
    The subvalvular cavities of the check valves through the discharge grooves communicate respectively with the pressure channel in one of the positions of the spool, and the chambers can be made in the form of holes in the spool or in a location of liners additionally installed in the cylinder.
    FIG. 1 shows the distributor, axial section: FIG. 2 - valve, made with chambers in the form of holes, axial section; in fig. 3 is a section A-A in FIG. 2
    The distributor comprises a housing 1 having openings 2 and 3 for connecting additional valves (not shown),
    pressure and drain channels 5 and 6
    7 and 8 communication with the actuator
    9, a cylindrical valve 10, mounted in the bore of the housing 1 and informing
    parallel channel 11 with control channels 12 and 13 in one of the positions of the spool 10. The distributor is additionally equipped with check valves 14 and 15, each of which is designed as a fixed plunger installed in housing 1
    16 with seals 17, the plunger 16 having axial 18 and radial 19 channels interconnected, and in the form of a ball 20, which forms a valve valve 21 with a housing 1, and a valve above the valve valve 22 with a valve plug 16.
    The internal cavity of the spool 10 is divided into chambers 23 and 24 with input 25 and 26 and output 27 and 28 channels with discharge grooves 29 and 30, In this case
    each chamber 23 and 24 has a spring-loaded plunger 31, which forms a spring 32 and an end 33 cavity, communicating with a pressure channel 4 in one
    From the extreme positions of the spool 10, in addition, sleeves 34 and 35 are additionally installed in each chamber 23 and 24. The working fluid is supplied to the actuator 9 from the power source 36 connected to the parallel input channel 11 and through the bypass valve 37 to the drain 38. The sleeves 34 and 35 are made with channels 39 and 40, the spool 10 has channels 41-44 located radially, as well as longitudinal channels 45 and 46, the spring cavity 32 of sleeves 34 and 35 contains a spring 47.
    Chambers 23 and 24 of the spool 10 can be made offset from the axis of the cylindrical spool 10, and the supply channels 45 and 46 - in places of reinforcement of the spool 10, with the chambers 23 and 24 and the channels 45 and 46 made in the form of drillings (Fig. 2),
    The distributor works as follows.
    In the middle position, the control channels 12 and 13 are connected via output channels 27 and 28 of the spool 10 and discharge slots 29 and 30 to drain channels 5 and 6. Channels 7 and 8 of the actuator 9 are closed, the power supply 36 is disconnected from the actuator 9. Cavities 21 check valves 14 and 15 communicate with drain 38, relief valve 37 is unloaded, power source 36 supplies working fluid to drain 38. When the spool 10 is partially displaced, for example, the connection of the output channel 27 to the right opens to a discharge groove 29 and drain channel 5, at u the volume connects the output channel 27 with the corresponding channel 7 of the actuator 9 and controls the pressure in the channels 7 by means of the bypass valve 37 through the control channel 12 and through the non-return valve 14. The flow of working fluid from the power source 36 through the bypass valve 37 decreases, and the pressure in the parallel 11 and a pressure 4 channels increases.
    At the same time, the channel 41 closes and the channel 42 is connected to the pressure channel 4. In this case, the pressure channel 4 is connected to the channels 42 and 45, in the sleeve 34
    - to the channel 39 and the end cavity 33 of the plunger 31. Upon further movement of the spool 10 under the action of the pressure of the working fluid, the pressure channel 4 is connected to the inlet channels 25 of the sleeve 34, and the working fluid flows through the spring cavity 32, and then through the output channels 27
    -in channel 7 of communication with the actuator 9. At the same time, the plunger 31 is acted on one side of the sleeve 34 by the pressure of the fluid of the discharge channel 4, and on the other by a decrease in the amount of losses in the inlets 25 in the sleeve 34 and the force 5 of the spring 47. Plunger 31 of the sleeve 34 will open the inlet channels 25 so as to maintain the balance between the inlet pressure in the pressure channel 4 and the same pressure, but reduced by
    0 pressure loss due to overflow from pressure channel 4 to spool 10 and spring force 47. That is however, the pressure loss between the pressure channel 4 and the internal cavity of the spool 10 is kept constant, thereby controlling the flow of working fluid to the actuator 9 depending on the opening of the input channels 25 and the section of the channel 4.
    The flow of working fluid from the actuator 9 enters the inlet channel 26 and through the spring cavity 32 of the sleeve 35 and the outlet channel 28 - into the drain channel 6. The channel 44 of the spool 10 is connected to the drain channel 6, while the channel 43 is closed, i.e. end cavity, 33 of the sleeve 35 is connected to the drain 38. Thus, when draining the plunger 31 of the sleeve 35 is not involved in controlling the flow of working fluid. When you rearrange the spool 10 left work
    0 distributor is similar. By making channels 41 and 44 aligned with the drain channels 5 and 6, and channels 42 and 43, in the immediate vicinity of channels 7 and 8,
    5 flow control in the direction from the actuator 9. In this case, the plunger 31 of the sleeve 34 will not participate in the regulation of the flow of fluid.
    When supplying the spool 10 only
    0 with one plunger 31, for example, in a sleeve
    34 or when disconnecting the plunger 31 sleeve
    35 It is possible to regulate the flow of the working fluid. bones; direction a
    mechanism 9 - when rearranging spool 5 10 to the right and in direction from actuator 9 - when rearranging spool 10 to the left.
    The valve with the spool 10, made without the installation of sleeves 34 and 35, works similarly.
    The proposed distributor is used for all types of liquid distribution, when it is necessary to regulate the flow, and hence the speed of the actuator, independent of the load, and where several movements should be controlled at the same time, especially in cases when it is necessary to control the flow of fluid in the direction of demand. (for example, in cauldrons, carts with high lifting, on
    权利要求:
    Claims (3)
    [1]
    Claim
    1. A distributor with controlled flows independent of the load, comprising a housing having openings for connecting additional valves with pressure, drain and communication channels connected to the actuator, a spool installed in the housing bore and communicating a parallel channel with two control channels in one of the positions spool, characterized in that, in order to expand the regulation range, it is equipped with check valves, each of which is made in the form of distributed in the housing spruce of a fixedly installed plunger with seals having axial and radial channels communicated with each other, and a ball forming a sub-valve with the body, and with a plunger a supravalve cavity and installed with the possibility of overlapping the axial channel of the plunger, the spool being made in the form of a hollow cylinder whose inner cavity is fold. divided into two chambers with inlet and outlet channels having discharge channels, a spring-loaded plunger is installed in each chamber to form a spring cavity and an end cavity communicating with the pressure channel at one of the extreme positions of the spool, and the subvalve cavity of the check valves through the said discharge grooves respectively communicate with a pressure channel in one of the valve positions.
    [2]
    2. The distributor for π. ΐ, with the fact that the cameras are made in the form
    20 drills in the spool.
    [3]
    3. The distributor rio p. 1, with the fact that the cameras are made in the form of additionally installed sleeves in the cylinder.
    D.
    2331 29 25 30 6 27
    1 ^^ 51444 ^ 44444 ^ 441.444444444444444 - "4 Fig. 1
    A fi & z
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    US4179889A|1979-12-25|Control circuit for hydraulic cylinder and shaft assembly
    同族专利:
    公开号 | 公开日
    CS231935B1|1984-12-14|
    DD234569A3|1986-04-09|
    BG46406A1|1989-12-15|
    DE3346463A1|1984-07-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3501673A|1968-04-29|1970-03-17|Stromberg Datagraphix Inc|Variable magnification cathode ray tube|
    US4187877A|1975-01-13|1980-02-12|Commercial Shearing Inc.|Compensated work port fluid valves|DE3446945C2|1984-12-21|1994-12-22|Rexroth Mannesmann Gmbh|Directional control valve with built-in pilot operated flow control valve|
    ES2004356A6|1986-12-26|1989-01-01|Hiac Valman S A|Distributor for hydraulic cylinders.|
    DE4234035A1|1992-10-09|1994-04-14|Rexroth Mannesmann Gmbh|Distributing valve for driving hydraulic load, esp. mobile machinery - has control valve arranged with counter piston in blind bore in control piston casing|
    US5664417A|1996-03-20|1997-09-09|Husco International, Inc.|Control valve for prime mover speed control in hydraulic systems|
    DE19646445A1|1996-11-11|1998-05-14|Rexroth Mannesmann Gmbh|Valve arrangement|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CS1011182A|CS231935B1|1982-12-31|1982-12-31|Distributor with controlled load independent flow|
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