CN205956092U - Take pressure turnout function's open pump controller of permanent power - Google Patents
Take pressure turnout function's open pump controller of permanent power Download PDFInfo
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- CN205956092U CN205956092U CN201620770090.7U CN201620770090U CN205956092U CN 205956092 U CN205956092 U CN 205956092U CN 201620770090 U CN201620770090 U CN 201620770090U CN 205956092 U CN205956092 U CN 205956092U
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Abstract
The utility model relates to a take pressure turnout function's open pump controller of permanent power, it includes hydraulic pump, LS pressure -compensated valve and constant power control valve, LS pressure -compensated valve is liquid accuse two -position three way valve, one of them import of this valve and the case bottom of this valve all is connected with the main pump oil -out, another imports and be connected with the oil tank, the case top of this valve and come from the load sensitivity pressure signal tube coupling of main valve, the constant power control valve is the mechanical control two -position three way valve, and one of them import of this valve is connected with the main pump oil -out, another import and LS pressure -compensated valve's exit linkage, and the case of this valve is connected by constant power control mechanism controls, the export and the variable piston of this valve, has drawn forth overflow passage on the load sensitivity pressure signal pipeline, the last LS pressure overflow valve that is connected with of overflow passage, and the export of LS pressure overflow valve is connected with the oil tank. The utility model discloses simple structure, transformation convenience, pump response speed piece and the harm of effectively reduction overload.
Description
Technical field
The utility model is related to a kind of open model pump control device.
Background technology
Traditional open model pump control device is without pressure cut off function, as shown in figure 1, adopting woods moral load-sensitive band invariable power
The hydraulic pump controlling, hydraulic pump includes main pump 1 and variable piston 2, and main pump 1 oil-out connects LS pressure-compensated valve 3 and invariable power
Control valve 4, wherein：LS pressure-compensated valve 3 is hydraulic control two position three-way valve, one of import of this valve and the valve element bottom of this valve
End is all connected with main pump oil-out, and the valve element top of this valve is connected with the load-sensitive pressure signal pipeline 5 carrying out autonomous valve；Permanent work(
Rate control valve 4 be Mechanical course two position three-way valve, one of import of this valve is connected with main pump oil-out, another import and
The outlet of LS pressure-compensated valve 3 connects, and the valve element bottom of this valve is connected with Power Control piston 6, the other end connects the first slide block
7.
The piston rod of variable piston 2, in addition to being connected with main pump swash plate, is also associated with position feedback rod 8, position thereon
The other end of feedback rod 8 connects the second slide block 9, hinged lever 10 on main valve body, the first slide block 7, lever 10, the second slide block 9 shape
Become equalising torque structure, two slide blocks can slide along lever 10 surface.By above-mentioned equalising torque structure and constant power control valve
The constant power output function of pump is realized in cooperation.
It is connected main overflow valve 11, for limiting the maximum pressure of system between main pump oil-out and main valve oil-in.
In above-mentioned control mode, after load pressure increase leads to LS loine pressure to raise, system pressure increases to over master
The setting of overflow valve 11, now main overflow valve 11 open, the discharge capacity of pump is determined by main valve aperture, and the hydraulic oil that pump is discharged all can be
The pressure underflow stream that main overflow valve 11 sets, causes very big energy loss and produces amount of heat.
Also has BOSCH-REXROTH LRDS control mode, as shown in Figure 2, this control mode carries pressure cut off work(in prior art
Can, pressure cut off function is realized by pressure shut-off valve 12.During air pump inoperative, the valve element of pressure shut-off valve 12 is consolidated by left side spring
It is scheduled on left position；When actuator works, operating pressure feeds back to the outlet of pump through main throttle orifice 13, and the outlet pressure of pump is with holding
The change of pressure of row device is simultaneously transferred to the right side of pressure shut-off valve through oil duct.The operating pressure of actuator increases and will lead to pump
Outlet pressure increase, after the outlet pressure of pump exceedes the setting of spring on the left of pressure shut-off valve, the valve of pressure shut-off valve 12
Core is mobile, and to right position, variable piston 2 rodless cavity is communicated with the outlet of pump, and hydraulic oil promotes variable swash plate to reset, the discharge capacity of main pump 1
Zero, enters holding state.
In above-mentioned control mode, after the operating pressure increase of actuator leads to LS pressure rise, the discharge capacity of pump is still protected
Hold constant, so that the outlet pressure of pump is raised until the operating pressure of actuator is delivered to main pump outlet side through main valve, now pressure
Cutting function just can start the discharge capacity reducing pump, but there is throttle orifice in main valve, and the transmission of actuator change of pressure is slower,
Pump cannot make quick response to the change of actuator operating pressure.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of invariable power open model pump control system with pressure cutting function
Device, this controller architecture is simple, and transformation is convenient, can accelerate the response speed to load for the pump, effectively reduces excessive load damages.
For solving the above problems, the invariable power open model pump control device with pressure cutting function of the present utility model, including liquid
Press pump, LS pressure-compensated valve and constant power control valve, hydraulic pump includes main pump and variable piston；LS pressure-compensated valve is hydraulic control two
Position three-way valve, one of import of this valve and the valve element bottom of this valve are all connected with main pump oil-out, another import with
Fuel tank connects, and the valve element top of this valve is connected with the load-sensitive pressure signal pipeline carrying out autonomous valve；Constant power control valve is machine
Tool controls two position three-way valve, and one of import of this valve is connected with main pump oil-out, another import and LS pressure-compensated valve
Outlet connect, by power limitation control mechanism controls, the outlet of this valve is connected the valve element of this valve with variable piston, it is characterized in that institute
State and lead to overflow passage on load-sensitive pressure signal pipeline, overflow passage is connected with LS Pressure relief valve, LS pressure overflows
The outlet of stream valve is connected with fuel tank.
First segment oilhole, two imports of LS pressure-compensated valve are arranged on the pipeline of described LS pressure compensation valve core bottom
Second section oilhole and the 3rd fuel-economizing hole are respectively provided with pipeline, the export pipeline of constant power control valve arranges the 4th fuel-economizing hole.
In the key position of pressure change, fuel-economizing hole is set, can be with balance system pressure it is ensured that the stability of system.
Described power limitation control mechanism includes Power Control piston and the connection being connected with power limitation control valve core top
In the first slide block of power limitation control valve core bottom, the piston rod of variable piston is connected with position feedback rod, position is fed back
Other end connection second slide block of bar, hinged lever on main valve body, the first slide block and the second slide block press up against the upper of lever
Portion and bottom and three's formation equalising torque structure.Realize the permanent work(of pump by equalising torque structure and constant power control valve cooperation
Rate exports.
Operation principle of the present utility model is：Main valve is failure to actuate when being in middle position, and pump is in low pressure holding state, works as main valve
After beginning action, the operating pressure of actuator feeds back to the controller of pump through load-sensitive pressure signal pipeline, by controller
In LS pressure-compensated valve and constant power control valve control variables piston adjusting the discharge capacity of pump.When actuator operating pressure is too high
When, load-sensitive pressure signal pipeline pressure can increase therewith, and when the Opening pressure more than LS overflow valve, overflow valve starts to overflow
Stream, by the oil circuit off-load of load-sensitive pressure signal pipeline, LS pressure-compensated valve is switched to bottom, the variable piston rodless cavity of pump
With the outlet of pump, the swash plate pivot angle reduction of pump, the discharge capacity of pump gradually decreases to minimum, enters holding state.
In said structure, for the change of pressure of actuator, the pressure-responsive speed of load-sensitive pressure signal pipe
Fast to cross main pump outlet pressure, thus accelerating the response speed that pump changes to load pressure.The utility model is in load-sensitive
In band power limitation control module basis, be can get by way of being superimposed LS overflow valve, improvement cost is low, it is easy to accomplish.
In sum, the utility model has the response speed that structure is simple, transformation is convenient, can accelerate pump and effective reduction
The advantage of excessive load damages.
Brief description
With reference to the accompanying drawings and detailed description the utility model is described in further detail：
Fig. 1 is the structural representation with the open model pump control device of power limitation control for the load-sensitive of prior art；
Fig. 2 is the structural representation of the open model pump control device of BOSCH-REXROTH LRDS control of prior art；
Fig. 3 is structural representation of the present utility model.
Specific embodiment
Fig. 1 is the existing woods hydraulic pump with power limitation control for the moral load-sensitive, and this hydraulic pump includes main pump 1 and variable is lived
Plug 2, main pump 1 oil-out connects LS pressure-compensated valve 3 and constant power control valve 4, wherein：LS pressure-compensated valve 3 is hydraulic control two
Triple valve, one of import of this valve and the valve element bottom of this valve are all connected with main pump oil-out, the valve element top of this valve
It is connected with the load-sensitive pressure signal pipeline 5 carrying out autonomous valve；Constant power control valve 4 is Mechanical course two position three-way valve, this valve
One of import be connected with main pump oil-out, another import is connected with the outlet of LS pressure-compensated valve 3, the valve element of this valve
Bottom is connected with Power Control piston 6, the other end connects the first slide block 7.The piston rod of variable piston 2 is except with main pump swash plate even
Outside connecing, it is also associated with position feedback rod 8 thereon, the other end of position feedback rod 8 connects the second slide block 9, hinged on main valve body
Lever 10, the first slide block 7, lever 10, the second slide block 9 form equalising torque structure, and two slide blocks can slide along lever 10 surface.
Realize the constant power output function of pump by above-mentioned equalising torque structure and constant power control valve cooperation.Main pump oil-out and main valve
Main overflow valve 11 is connected, for limiting the maximum pressure of system between oil-in.
In this control mode, after load pressure increase leads to LS loine pressure to raise, system pressure increases to over main overflowing
Flow the setting of valve 11, now main overflow valve 11 is opened, and the discharge capacity of pump is determined by main valve aperture, the hydraulic oil that pump is discharged all can led
The pressure underflow stream that overflow valve 11 sets, causes very big energy loss and produces amount of heat.
Fig. 2 is BOSCH-REXROTH LRDS control mode in prior art, as shown in Fig. 2 this control mode carries pressure cut off work(
Can, pressure cut off function is realized by pressure shut-off valve 12.During air pump inoperative, the valve element of pressure shut-off valve 12 is consolidated by left side spring
It is scheduled on left position；When actuator works, operating pressure feeds back to the outlet of pump through main throttle orifice 13, and the outlet pressure of pump is with holding
The change of pressure of row device is simultaneously transferred to the right side of pressure shut-off valve through oil duct.The operating pressure of actuator increases and will lead to pump
Outlet pressure increase, after the outlet pressure of pump exceedes the setting of spring on the left of pressure shut-off valve, the valve of pressure shut-off valve 12
Core is mobile, and to right position, variable piston 2 rodless cavity is communicated with the outlet of pump, and hydraulic oil promotes variable swash plate to reset, the discharge capacity of main pump 1
Zero, enters holding state.
In this control mode, after the operating pressure increase of actuator leads to LS pressure rise, the discharge capacity of pump remains in that
Constant, so that the outlet pressure of pump is raised until the operating pressure of actuator is delivered to main pump outlet side through main valve, now pressure is cut
Disconnected function just can start the discharge capacity reducing pump, but there is throttle orifice in main valve, and the transmission of actuator change of pressure is slower, pump
Quick response cannot be made to the change of actuator operating pressure.
Fig. 3 is the invariable power open model pump control device with pressure cutting function of the present utility model, and it includes hydraulic pump, LS pressure
Force compensating valve 3 and constant power control valve 4, hydraulic pump includes main pump 1 and variable piston 2；LS pressure-compensated valve 3 is hydraulic control two three
Port valve, one of import of this valve and the valve element bottom of this valve are all connected with main pump oil-out, another import and fuel tank
15 connections, the valve element top of this valve is connected with the load-sensitive pressure signal pipeline 5 carrying out autonomous valve；Constant power control valve 4 is machine
Tool controls two position three-way valve, and one of import of this valve is connected with main pump oil-out, another import and LS pressure-compensated valve 3
Outlet connect, by power limitation control mechanism controls, the outlet of this valve is connected the valve element of this valve with variable piston 2, load-sensitive
Overflow passage is led on pressure signal pipeline 5, overflow passage is connected with LS Pressure relief valve 14, LS Pressure relief valve 14
Outlet is connected with fuel tank 15.Wherein, power limitation control mechanism includes the Power Control being connected with power limitation control valve core top
Piston 6 and the first slide block 7 being connected to power limitation control valve core bottom, the piston rod of variable piston 2 are connected with position anti-
Feedback bar 8, the other end of position feedback rod 8 connects the second slide block 9, hinged lever 10 on main valve body, the first slide block 7 and the second slide block
9 upper and lowers pressing up against lever 10 and three's formation equalising torque structure.By equalising torque structure and invariable power
The constant power output of pump is realized in control valve cooperation.
In controller of the present utility model, main valve is failure to actuate when being in middle position, and pump is in low pressure holding state, when main valve is opened
After initiating is made, the operating pressure of actuator feeds back to the controller of pump through load-sensitive pressure signal pipeline 5, by controller
LS pressure-compensated valve 3 and constant power control valve 4 control variables piston adjusting the discharge capacity of pump.When actuator operating pressure is too high
When, the pressure of load-sensitive pressure signal pipeline 5 can increase therewith, when the Opening pressure more than LS overflow valve 14, LS overflow valve
14 beginning overflows, by the oil circuit off-load of load-sensitive pressure signal pipeline 5, LS pressure-compensated valve 3 is switched to bottom, the variable of pump
Piston rodless cavity and the outlet of pump, the swash plate pivot angle of pump reduces, and the discharge capacity of pump gradually decreases to minimum, enters standby shape
State.
For the change of pressure of actuator, the pressure-responsive speed of load-sensitive pressure signal pipe 5 fast will cross main pump
Outlet pressure, thus accelerate the response speed that pump changes to load pressure.The utility model is permanent in existing load-sensitive band
On the basis of power control module, be can get by way of being superimposed LS overflow valve, improvement cost is low, it is easy to accomplish.
With reference to Fig. 3, the pipeline of LS pressure compensation valve core bottom arranges first segment oilhole D1, LS pressure-compensated valve 3
Second section oilhole D2 and the 3rd fuel-economizing hole D3 is respectively provided with two inlet ductwork, the export pipeline of constant power control valve 4 sets
Put the 4th fuel-economizing hole D4.In the key position of pressure change, fuel-economizing hole is set, can be with balance system pressure it is ensured that the stablizing of system
Property.
In sum, the utility model is not limited to above-mentioned specific embodiment.Those skilled in the art, without departing from this reality
On the premise of new spirit and scope, some changes and modification can be done.Protection domain of the present utility model should be with this reality
It is defined with new claim.
Claims (3)
1. a kind of invariable power open model pump control device with pressure cutting function, including hydraulic pump, LS pressure-compensated valve（3）With permanent work(
Rate control valve（4）, hydraulic pump includes main pump（1）With variable piston（2）；LS pressure-compensated valve（3）For hydraulic control two position three-way valve, it is somebody's turn to do
The valve element bottom of one of import of valve and this valve is all connected with main pump oil-out, another import and fuel tank（15）Even
Connect, the valve element top of this valve and the load-sensitive pressure signal pipeline carrying out autonomous valve（5）Connect；Constant power control valve（4）For machine
Tool controls two position three-way valve, and one of import of this valve is connected with main pump oil-out, another import and LS pressure-compensated valve
（3）Outlet connect, the valve element of this valve is by power limitation control mechanism controls, the outlet of this valve and variable piston（2）Connect, it is special
Levying is described load-sensitive pressure signal pipeline（5）On lead to overflow passage, overflow passage is connected with LS Pressure relief valve
（14）, LS Pressure relief valve（14）Outlet and fuel tank（15）Connect.
2. the invariable power open model pump control device with pressure cutting function as claimed in claim 1, is characterized in that described LS pressure
Compensate and first segment oilhole is arranged on the pipeline of valve core bottom（D1）, LS pressure-compensated valve（3）Two inlet ductwork on respectively
Setting second section oilhole（D2）With the 3rd fuel-economizing hole（D3）, constant power control valve（4）Export pipeline on arrange the 4th fuel-economizing hole
（D4）.
3. the invariable power open model pump control device with pressure cutting function as claimed in claim 1 or 2, is characterized in that described perseverance work(
Rate controlling organization includes the Power Control piston being connected with power limitation control valve core top（6）Be connected to constant power control valve
First slide block of valve element bottom（7）, variable piston（2）Piston rod on be connected with position feedback rod（8）, position feedback rod（8）
The other end connect the second slide block（9）, hinged lever on main valve body（10）, the first slide block（7）With the second slide block（9）It is pressed against respectively
In lever（10）Upper and lower and three formed equalising torque structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770090.7U CN205956092U (en) | 2016-07-21 | 2016-07-21 | Take pressure turnout function's open pump controller of permanent power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620770090.7U CN205956092U (en) | 2016-07-21 | 2016-07-21 | Take pressure turnout function's open pump controller of permanent power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205956092U true CN205956092U (en) | 2017-02-15 |
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ID=57971004
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620770090.7U Active CN205956092U (en) | 2016-07-21 | 2016-07-21 | Take pressure turnout function's open pump controller of permanent power |
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| Country | Link |
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| CN (1) | CN205956092U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664118A (en) * | 2017-11-07 | 2018-02-06 | 安徽博流体传动股份有限公司 | A kind of hydraulic planger pump of a variety of Variable Control functions of band |
| CN109854471A (en) * | 2019-02-01 | 2019-06-07 | 中航力源液压股份有限公司 | The hydraulic planger pump of two grades of power control devices |
| CN111720377A (en) * | 2020-06-29 | 2020-09-29 | 潍柴动力股份有限公司 | Power control valve block, hydraulic pump assembly and engineering machinery |
| CN114100179A (en) * | 2022-01-21 | 2022-03-01 | 山东神驰石化有限公司 | Production MTBE component cut heavy column pressure supplementing device |
-
2016
- 2016-07-21 CN CN201620770090.7U patent/CN205956092U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107664118A (en) * | 2017-11-07 | 2018-02-06 | 安徽博流体传动股份有限公司 | A kind of hydraulic planger pump of a variety of Variable Control functions of band |
| CN109854471A (en) * | 2019-02-01 | 2019-06-07 | 中航力源液压股份有限公司 | The hydraulic planger pump of two grades of power control devices |
| CN109854471B (en) * | 2019-02-01 | 2024-05-14 | 中航力源液压股份有限公司 | Hydraulic plunger pump of two-gear power control device |
| CN111720377A (en) * | 2020-06-29 | 2020-09-29 | 潍柴动力股份有限公司 | Power control valve block, hydraulic pump assembly and engineering machinery |
| CN111720377B (en) * | 2020-06-29 | 2022-07-15 | 潍柴动力股份有限公司 | Power control valve block, hydraulic pump assembly and engineering machinery |
| CN114100179A (en) * | 2022-01-21 | 2022-03-01 | 山东神驰石化有限公司 | Production MTBE component cut heavy column pressure supplementing device |
| CN114100179B (en) * | 2022-01-21 | 2022-05-17 | 山东神驰石化有限公司 | Weight cutting tower pressure supplementing device for producing MTBE components |
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| GR01 | Patent grant |