CN107288837A - A kind of Variable plunger pump and its control method - Google Patents
A kind of Variable plunger pump and its control method Download PDFInfo
- Publication number
- CN107288837A CN107288837A CN201610230367.1A CN201610230367A CN107288837A CN 107288837 A CN107288837 A CN 107288837A CN 201610230367 A CN201610230367 A CN 201610230367A CN 107288837 A CN107288837 A CN 107288837A
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- China
- Prior art keywords
- control
- controller
- valve
- pressure
- control valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/26—Control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses a kind of Variable plunger pump, including the pump housing, bonnet, the power transmission shaft being located in the pump housing, the change gauge rod by being driven shaft-driven swash plate and being moved reciprocatingly by swash plate drive；The change gauge rod becomes on gauge rod control chamber, the pump housing with pump body formation one is provided with control chamber entrance and control chamber outlet that feed flow force feed turnover becomes gauge rod control chamber；The control chamber entrance is provided with the control valve group for controlling hydraulic oil entering variable bar control chamber, the control valve group includes proportional throttle valve, power control valve and remote pressure valve, and proportional throttle valve, power control valve and the remote pressure valve of the control valve group individually start.The variable piston method for controlling pump of the present invention realizes the complex controll to three kinds of modes of Variable plunger pump, and the technical barrier of single control can only be carried out by solving Variable plunger pump in the prior art, with very strong creativeness.
Description
Technical field
The present invention relates to pump field, more particularly to a kind of Variable plunger pump and its control method.
Background technology
Plunger pump is an important device of hydraulic system.It is moved back and forth by plunger in cylinder body, makes seal operation cavity volume
Volume changes to realize oil suction, force feed.Plunger pump has rated pressure height, compact conformation, efficiency high and Flow-rate adjustment side
Just the advantages of, it is widely used in the occasion that high pressure, big flow and flow need to adjust, such as hydraulic press, engineering machinery and ship
In oceangoing ship.
Generally, plunger pump includes the pump housing, bonnet, transmission shaft, swash plate and becomes gauge rod.When motor drives power transmission shaft rotation,
Due to the ramp effect of swash plate, becoming gauge rod will move reciprocatingly in the pump housing.When change gauge rod is contacted with swash plate low spot, variable
Bar control chamber volume gradually increases, therefore hydraulic oil sucks the pump housing through control chamber entrance；And when change gauge rod is contacted with swash plate high point,
Variable rod controller volume is gradually reduced, and hydraulic oil is exported through control chamber and discharged in the pump housing.As long as power transmission shaft constantly rotates, hydraulic pressure
Oil constantly will be inhaled into and discharge.And change the angle of swash plate, it is possible to change the haul distance for becoming gauge rod in the pump housing,
The flow of pump can be changed.What the angle of inclination of swash plate was fixed is referred to as quantitative plunger pump, and the angle of inclination of swash plate can change just
Referred to as Variable plunger pump.
Existing Variable plunger pump is typically only capable to carry out a kind of control in flow control, Power Control or Stress control, only carries out
Flow is controlled, and the power or pressure that may result in Variable plunger pump carry out other two kinds controls often, only, also occur similar
The problem of, therefore, market has increasing need for a kind of to realize the Variable plunger pump of multiple control modes complex controll.
The content of the invention
In order to overcome shortcoming and defect present in prior art, the invention provides a kind of Variable plunger pump, including the pump housing, after
Power transmission shaft, the change gauge rod by being driven shaft-driven swash plate and being moved reciprocatingly by swash plate drive cover, being located in the pump housing；Institute
State and feed flow force feed turnover change gauge rod control chamber is provided with change gauge rod and the change gauge rod control chamber of pump body formation one, the pump housing
Control chamber entrance and control chamber outlet；The control chamber entrance is provided with the control for controlling hydraulic oil entering variable bar control chamber
Valve group, the control valve group includes proportional throttle valve, power control valve and remote pressure valve, and the ratio of the control valve group throttles
Valve, power control valve and remote pressure valve individually start.
Further, the displacement transducer for detection variable bar displacement is additionally provided with the pump housing, institute's displacement sensors will
Become gauge rod displacement detecting value and be sent to a controller, the displacement detecting value for becoming gauge rod is calculated and is converted into pressure detecting by the controller
Value.
Further, the minimum nominal load pressure and maximum rated load pressure of Variable plunger pump are preset with the controller,
The controller by detected pressure value and minimum nominal load pressure and maximum rated load pressure ratio compared with.
Further, the controller and the proportional throttle valve signal of control valve group are connected, if detected pressure value is specified less than minimum
Load pressure, then the controller transmission enabled instruction is to proportional throttle valve, and the proportional throttle valve starts.
Further, the controller and the Power Control valve signal of control valve group are connected, if detected pressure value is specified between minimum
Load pressure and maximum rated load pressure, then the controller transmission enabled instruction is to power control valve, the power control valve
Start.
Further, the controller and the remote pressure valve signal of control valve group are connected, if detected pressure value is more than maximum rated
Load pressure, then the controller transmission enabled instruction is to remote-control pressure control valve, and the remote pressure valve starts.
The invention also discloses a kind of variable piston method for controlling pump, comprise the following steps：
S1. the minimum nominal load pressure and maximum rated load pressure of design variables plunger pump on the controller；
S2. displacement transducer detects the displacement of this variations per hour bar, and displacement detecting value is sent to controller by displacement transducer；
S3. the displacement detecting value for becoming gauge rod is calculated and is converted into detected pressure value by controller, and this detected pressure value and minimum is specified
Load pressure and maximum rated load pressure ratio compared with；
If S4. detected pressure value is less than minimum nominal load pressure, controller control proportional throttle valve starts, proportional throttle valve control
The The hydraulic oil of entering variable bar control chamber processed, proportional throttle valve realizes flow control；
If detected pressure value is between minimum nominal load pressure and maximum load pressure, controller control power control valve
Start, power control valve realizes power limitation control；
If detected pressure value is more than maximum rated load pressure, controller control remote pressure valve starts, and hydraulic oil is from long-range
Pressure valve entering variable bar control chamber, hydraulic oil promotes change gauge rod movement the flow of Variable plunger pump is zeroed, long-range pressure
Power valve realizes Stress control.
Relative to prior art, Variable plunger pump of the invention is by setting control valve group, displacement transducer and controller, displacement
The displacement of sensor detection variable bar, and displacement detecting value is sent to controller, displacement detecting value is calculated and is converted into by controller
Detected pressure value, controller is by this detected pressure value and default minimum rated pressure value and maximum rated pressure value phase in controller
Compare, so as to send the proportional throttle valve or power control valve or remote pressure valve in instruction startup control valve group, realize to variable
The complex controll of three kinds of modes of plunger pump, the technical barrier of single control can only be carried out by solving Variable plunger pump in the prior art,
With very strong creativeness.Variable plunger pump of the invention is simple in construction, be skillfully constructed, with very strong market promotion prospect.
In order to more fully understand and implement, the invention will now be described in detail with reference to the accompanying drawings.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the Variable plunger pump of the present invention.
Fig. 2 is the internal structure schematic diagram of the Variable plunger pump of the present invention.
Fig. 3 is the hydraulic principle schematic diagram of the Variable plunger pump of the present invention.
Fig. 4 is the Pressure-flow curves schematic diagram of the Variable plunger pump of the present invention.
Embodiment
Refer to Fig. 1-Fig. 4.Fig. 1 is the dimensional structure diagram of the Variable plunger pump of the present invention.Fig. 2 is the variable of the present invention
The internal structure schematic diagram of plunger pump.Fig. 3 is the hydraulic principle schematic diagram of the Variable plunger pump of the present invention.Fig. 4 is of the invention
The Pressure-flow curves schematic diagram of Variable plunger pump.
The present invention Variable plunger pump, including the pump housing 10, bonnet 20, be located in the pump housing 10 power transmission shaft 30, by power transmission shaft
The swash plate 40 of 30 drivings and the change gauge rod 50 moved reciprocatingly by the drive of swash plate 40；Become gauge rod 50 to be internally formed with the pump housing 10
One becomes on gauge rod control chamber 11, the pump housing 10 the control chamber entrance 12 for being provided with feed flow force feed turnover change gauge rod control chamber 11 and control
Chamber outlet 13 processed；Control chamber entrance 12 is provided with the control valve group 60 for controlling hydraulic oil entering variable bar control chamber 11, control
Valve group 60 processed includes proportional throttle valve 61, power control valve 62 and remote pressure valve 63, the proportional throttle valve of control valve group 60
61st, power control valve 62 and remote pressure valve 63 individually start.
Specifically, the displacement transducer 70 for the displacement of detection variable bar 50, displacement transducer 70 are additionally provided with the pump housing 10
The displacement detecting value of gauge rod 50 will be become and be sent to a controller 80, the displacement detecting value for becoming gauge rod 50 is calculated and converted by controller 80
For detected pressure value.The minimum nominal load pressure and maximum rated load pressure of Variable plunger pump are preset with controller 80, is controlled
Device 80 processed by detected pressure value and minimum nominal load pressure and maximum rated load pressure ratio compared with.Controller 80 and control valve group
60 signal of proportional throttle valve 61 connection, if detected pressure value is less than minimum nominal load pressure, controller 80, which is sent, to be started
Instruction is to proportional throttle valve 61, and proportional throttle valve 61 starts.Controller 80 and the signal of power control valve 62 of control valve group 60
Connection, if detected pressure value is between minimum nominal load pressure and maximum rated load pressure, controller 80 sends enabled instruction
To power control valve 62, power control valve 62 starts.Controller 80 is connected with the signal of remote pressure valve 63 of control valve group 60,
If detected pressure value is more than maximum rated load pressure, controller 80 sends enabled instruction to remote-control pressure control valve 63, far
Stroke pressure valve 63 starts.
In addition, the invention also discloses a kind of variable piston method for controlling pump, comprising the following steps：
S1. on controller 80 design variables plunger pump minimum nominal load pressure P1 and maximum rated load pressure P2；
S2. displacement transducer 70 detects the displacement of this variations per hour bar 50, and displacement detecting value is sent to control by displacement transducer 70
Device 80 processed；
S3. the displacement detecting value for becoming gauge rod 50 is calculated and is converted into detected pressure value P by controller 80, and by this detected pressure value
P is compared with minimum nominal load pressure P1 and maximum rated load pressure P2；
If S4. detected pressure value P is less than minimum nominal load pressure P1, the control proportional throttle valve 61 of controller 80 starts,
The The hydraulic oil of the control entering variable bar of proportional throttle valve 61 control chamber 11, proportional throttle valve 61 realizes flow control；
The oil of the control entering variable bar of proportional throttle valve 61 control chamber 11, makes the pivot angle and electric signal of the swash plate 40 of Variable plunger pump
It is proportional, and by displacement transducer 70 obtain becoming the actual position information of gauge rod 50, and this displacement detecting value is converted into pressure
Power detected value P, by detected pressure value P and given minimum nominal load pressure P1 and maximum rated load pressure P2 progress pair
Than, so that closed-loop control system is formed, the pivot angle of accurate control swash plate 40, so as to control the flow of Variable plunger pump.
If detected pressure value P is between minimum nominal load pressure P1 and maximum load pressure P2, the control work(of controller 80
Rate control valve 62 starts, and realizes that the product of pressure and flow keeps constant, power control valve 62 realizes power limitation control；
If detected pressure value P is more than maximum rated load pressure P2, the control remote pressure of controller 80 valve 63 starts, hydraulic pressure
Oil is from the entering variable bar control chamber 11 of remote pressure valve 63, and hydraulic oil promotes the change movement of gauge rod 50 to return the flow of Variable plunger pump
Zero, remote pressure valve 63 realizes Stress control.
Relative to prior art, Variable plunger pump of the invention is by setting control valve group, displacement transducer and controller, displacement
The displacement of sensor detection variable bar, and displacement detecting value is sent to controller, displacement detecting value is calculated and is converted into by controller
Detected pressure value, controller is by this detected pressure value and default minimum rated pressure value and maximum rated pressure value phase in controller
Compare, so as to send the proportional throttle valve or power control valve or remote pressure valve in instruction startup control valve group, realize to variable
The complex controll of three kinds of modes of plunger pump, the technical barrier of single control can only be carried out by solving Variable plunger pump in the prior art,
With very strong creativeness.Variable plunger pump of the invention is simple in construction, be skillfully constructed, with very strong market promotion prospect.
The invention is not limited in above-mentioned embodiment, if the various changes or deformation to the present invention do not depart from the spirit of the present invention
And scope, if these are changed and deformation belongs within the scope of the claim and equivalent technologies of the present invention, then the present invention is also intended to
Include these changes and deformation.
Claims (7)
1. a kind of Variable plunger pump, it is characterised in that：Driven including the pump housing, bonnet, the power transmission shaft being located in the pump housing, by power transmission shaft
Swash plate and the change gauge rod that moves reciprocatingly is driven by swash plate；The change gauge rod becomes gauge rod control with pump body formation one
Control chamber entrance and control chamber outlet that feed flow force feed turnover becomes gauge rod control chamber are provided with chamber, the pump housing；The control
Chamber entrance is provided with the control valve group for controlling hydraulic oil entering variable bar control chamber, and the control valve group throttles including ratio
Valve, power control valve and remote pressure valve, proportional throttle valve, power control valve and the remote pressure valve point of the control valve group
It is not activated individually.
2. Variable plunger pump according to claim 1, it is characterised in that：It is additionally provided with the pump housing for detection variable bar position
The displacement transducer of shifting, institute's displacement sensors will become gauge rod displacement detecting value and be sent to a controller, and the controller will become
The displacement detecting value of gauge rod calculates and is converted into detected pressure value.
3. Variable plunger pump according to claim 2, it is characterised in that：The minimum of Variable plunger pump is preset with the controller
Nominal load pressure and maximum rated load pressure, the controller is by detected pressure value and minimum nominal load pressure and maximum
Nominal load pressure ratio compared with.
4. Variable plunger pump according to claim 3, it is characterised in that：The controller and the proportional throttle valve of control valve group are believed
Number connection, if detected pressure value is less than minimum nominal load pressure, the controller sends enabled instruction to proportional throttle valve,
The proportional throttle valve starts.
5. Variable plunger pump according to claim 3, it is characterised in that：The controller and the power control valve of control valve group are believed
Number connection, if detected pressure value is between minimum nominal load pressure and maximum rated load pressure, the controller sends and opened
Dynamic instruction is to power control valve, and the power control valve starts.
6. Variable plunger pump according to claim 3, it is characterised in that：The controller and the remote pressure valve of control valve group are believed
Number connection, if detected pressure value is more than maximum rated load pressure, the controller sends enabled instruction to remote pressure control
Valve processed, the remote pressure valve starts.
7. a kind of variable piston method for controlling pump, comprises the following steps：
S1. the minimum nominal load pressure and maximum rated load pressure of design variables plunger pump on the controller；
S2. displacement transducer detects the displacement of this variations per hour bar, and displacement detecting value is sent to controller by displacement transducer；
S3. the displacement detecting value for becoming gauge rod is calculated and is converted into detected pressure value by controller, and this detected pressure value and minimum is specified
Load pressure and maximum rated load pressure ratio compared with；
If S4. detected pressure value is less than minimum nominal load pressure, controller control proportional throttle valve starts, proportional throttle valve control
The The hydraulic oil of entering variable bar control chamber processed, proportional throttle valve realizes flow control；
If detected pressure value is between minimum nominal load pressure and maximum load pressure, controller control power control valve
Start, power control valve realizes power limitation control；
If detected pressure value is more than maximum rated load pressure, controller control remote pressure valve starts, and hydraulic oil is from long-range
Pressure valve entering variable bar control chamber, hydraulic oil promotes change gauge rod movement the flow of Variable plunger pump is zeroed, long-range pressure
Power valve realizes Stress control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610230367.1A CN107288837A (en) | 2016-04-13 | 2016-04-13 | A kind of Variable plunger pump and its control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610230367.1A CN107288837A (en) | 2016-04-13 | 2016-04-13 | A kind of Variable plunger pump and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107288837A true CN107288837A (en) | 2017-10-24 |
Family
ID=60093321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610230367.1A Pending CN107288837A (en) | 2016-04-13 | 2016-04-13 | A kind of Variable plunger pump and its control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107288837A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748469A (en) * | 2019-10-30 | 2020-02-04 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
| CN113482873A (en) * | 2021-08-09 | 2021-10-08 | 上海理工大学 | Valve control type variable plunger pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0544631A (en) * | 1991-08-12 | 1993-02-23 | Toyota Autom Loom Works Ltd | Hydraulic device for industrial vehicle |
| US5251537A (en) * | 1991-07-16 | 1993-10-12 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Hydraulic driving system |
| CN200952456Y (en) * | 2006-08-29 | 2007-09-26 | 陕西航天动力高科技股份有限公司 | Axial variable plunger pump |
| CN201068843Y (en) * | 2007-07-19 | 2008-06-04 | 中山市钜通机电技术有限公司 | Electrohydraulic load pressure flow control variable plunger pump |
| CN101550921A (en) * | 2009-05-05 | 2009-10-07 | 上海电气液压气动有限公司 | Variable control system of plunger variable pump |
| CN103277275A (en) * | 2013-05-29 | 2013-09-04 | 宁波恒力液压股份有限公司 | Electrically-controlled multifunctional combined proportional variable axial plunger pump |
| CN204716480U (en) * | 2015-06-18 | 2015-10-21 | 山东泰丰液压股份有限公司 | Oblique tray type axial plunger piston variable pump |
| CN205578199U (en) * | 2016-04-13 | 2016-09-14 | 广东科达洁能股份有限公司 | Variable plunger pump |
-
2016
- 2016-04-13 CN CN201610230367.1A patent/CN107288837A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5251537A (en) * | 1991-07-16 | 1993-10-12 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Hydraulic driving system |
| JPH0544631A (en) * | 1991-08-12 | 1993-02-23 | Toyota Autom Loom Works Ltd | Hydraulic device for industrial vehicle |
| CN200952456Y (en) * | 2006-08-29 | 2007-09-26 | 陕西航天动力高科技股份有限公司 | Axial variable plunger pump |
| CN201068843Y (en) * | 2007-07-19 | 2008-06-04 | 中山市钜通机电技术有限公司 | Electrohydraulic load pressure flow control variable plunger pump |
| CN101550921A (en) * | 2009-05-05 | 2009-10-07 | 上海电气液压气动有限公司 | Variable control system of plunger variable pump |
| CN103277275A (en) * | 2013-05-29 | 2013-09-04 | 宁波恒力液压股份有限公司 | Electrically-controlled multifunctional combined proportional variable axial plunger pump |
| CN204716480U (en) * | 2015-06-18 | 2015-10-21 | 山东泰丰液压股份有限公司 | Oblique tray type axial plunger piston variable pump |
| CN205578199U (en) * | 2016-04-13 | 2016-09-14 | 广东科达洁能股份有限公司 | Variable plunger pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110748469A (en) * | 2019-10-30 | 2020-02-04 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
| CN110748469B (en) * | 2019-10-30 | 2021-09-07 | 佛山市科达液压机械有限公司 | Control method and device of variable plunger pump and variable plunger pump |
| CN113482873A (en) * | 2021-08-09 | 2021-10-08 | 上海理工大学 | Valve control type variable plunger pump |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171024 |