CN106194680A - The axial plunger pump installation of a kind of high accuracy electric proportional control and control method - Google Patents
The axial plunger pump installation of a kind of high accuracy electric proportional control and control method Download PDFInfo
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- CN106194680A CN106194680A CN201610736360.7A CN201610736360A CN106194680A CN 106194680 A CN106194680 A CN 106194680A CN 201610736360 A CN201610736360 A CN 201610736360A CN 106194680 A CN106194680 A CN 106194680A
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Abstract
The invention discloses axial plunger pump installation and the control method of a kind of high accuracy electric proportional control, constitute and include electric proportional control valve (3) and there is inlet port (S) and the main pump body of actuator port (B), the variable cylinder small end (M) of main pump body, the big end of variable cylinder (N) is connected with electric proportional control valve (3), being parallel with pressure shut-off valve (19) control method on electric proportional control valve (3) is that the signal of input is changed into the thrust of magnetic bar by adoption rate electric magnet, set up electromagnetic force at automatically controlled spool two ends and swash plate rotates and makes feedback spring produce formation equilibrium relation between thrust, according to the change of electric current, discharge capacity is carried out continuously, proportional regulation.The present invention can not only realize the stable of main pump delivery and accurately control, and simple in construction, strong interference immunity.
Description
Technical field
The present invention relates to a kind of power-equipment, the axial plunger pump installation of a kind of high accuracy electric proportional control and control
Method processed.
Background technology
In elevator and rotary machine, for meeting the main frame accurate control to main pump output flow, especially main frame performs
For avoiding system pressure and flow attack during the action launching stage, the accurately control to main pump swash plate pivot angle is of crucial importance；Requirement
Control valve can accurately control main pump delivery, and at present, existing clino-axis type ratio plunger displacement pump distributing construction can produce larger flow
Pulsation and pressure fluctuation, to controlling interference compared with big and stroking mechanism complexity is huge, common inclined disc type electric-hydraulic proportion pump be use single
Cylinder Displacement Feedback, in-cylinder pressure is the lowest, and control accuracy is easily disturbed by housing return pressure, and precision is poor.
Summary of the invention
It is an object of the invention to, it is provided that the axial plunger pump installation of a kind of high accuracy electric proportional control and control method.
The present invention can not only realize the stable of main pump delivery and accurately control, and simple in construction, strong interference immunity.
Technical scheme: the axial plunger pump installation of a kind of high accuracy electric proportional control, it is characterised in that: include
Electric proportional control valve and the main pump body with inlet port and actuator port, the big end of the variable cylinder small end of main pump body, variable cylinder and electricity
Proportional control valve connects, and electric proportional control valve is parallel with pressure shut-off valve.
In the axial plunger pump installation of aforesaid high accuracy electric proportional control, described electric proportional control valve is also associated with external control
Pressure oil circuit, external control pressure oil circuit one end connects actuator port through check valve A, and the other end is provided with the outer pressure control with check valve C
Power hydraulic fluid port.
In the axial plunger pump installation of aforesaid high accuracy electric proportional control, described electric proportional control valve includes being arranged on electricity
Automatically controlled spool in control valve body, automatically controlled spool one end is provided with electric magnet, and middle part is provided with automatically controlled spool step, and the other end is provided with feedback
Spring, feedback spring is connected with feedback rod, shifting block, connection sheet in turn, and connecting sheet connection has swash plate.
In the axial plunger pump installation of aforesaid high accuracy electric proportional control, described feedback spring connects and has regulation bullet
Spring, regulation spring is provided with regulation screw.
In the axial plunger pump installation of aforesaid high accuracy electric proportional control, described pressure shut-off valve includes valve body, valve body
Inside being provided with pressure cut off spool, valve body-side arranges check valve B.
The control method of the axial plunger pump installation according to aforesaid high accuracy electric proportional control, it is characterised in that: use
The signal of input is changed into the thrust of magnetic bar by proportion electro-magnet, sets up electromagnetic force at automatically controlled spool two ends and swash plate rotates and makes instead
Feedback spring produces and forms equilibrium relation between thrust, according to the change of electric current, discharge capacity is carried out continuous, proportional regulation.
In the control method of the axial plunger pump installation of aforesaid high accuracy electric proportional control, control the input electricity of electric magnet
Stream is gradually increased, and on the left of automatically controlled spool step, valve port is closed, and the pressure oil of the big end of entering variable cylinder is cut off, meanwhile, and electrically-controlled valve
Opening on the right side of core step, force big end pressure to decline, swash plate rotates to big swing angle direction, after swash plate rotates, and the company of passing sequentially through
The angular displacement of swash plate is changed into straight-line displacement by contact pin, shifting block, feedback rod, and feedback spring power increases with the increase of straight-line displacement amount
Greatly, close on the right side of automatically controlled spool step, until swash plate two ends variable cylinder forms new dynamic balance state；Control the input of electric magnet
Electric current is gradually reduced, and closes, open on the left of automatically controlled spool step on the right side of automatically controlled spool step, and hydraulic oil is through automatically controlled spool step
The left side big end of entering variable cylinder.
In the control method of the axial plunger pump installation of aforesaid high accuracy electric proportional control, governor pressure oil circuit and work outside
Make, between hydraulic fluid port, check valve A is installed and external control hydraulic fluid port arranges check valve C, when the pressure of external control hydraulic fluid port is more than or equal to actuator port
Pressure time, check valve C opens, and check valve A closes, and it is the pressure oil of external control hydraulic fluid port that swash plate controls oil sources；When actuator port
When pressure is more than the pressure of external control hydraulic fluid port, check valve A opens, and check valve C closes, and it is actuator port that swash plate now controls oil sources
Pressure oil so that control more accurate.
In the control method of the axial plunger pump installation of aforesaid high accuracy electric proportional control, change anti-by regulation screw
Feedback spring and the common pretightning force of regulation spring, pretightning force is the biggest, and starting point is the highest, and pretightning force is the least, and starting point is the lowest.
In the control method of the axial plunger pump installation of aforesaid high accuracy electric proportional control, pressure shut-off valve is used to realize
Self-protection when making discharge capacity cause system pressure to rise when increasing is risen at electric current；Check valve B is used to guarantee pressure shut-off valve
Operationally it does not interfere with each other with electric proportional control valve.
Compared with prior art, the present invention has only to the input current to main pump and carries out coding-control, so that it may pressed by program
Main pump is controlled by the various operating modes of main frame, and this can realize main frame intelligentized control method accurately, arranges pressure shut-off valve simultaneously
System is protected.
The present invention can start moment at hoisting heavy or engineering machinery upper-part rotation, under load effect, makes main pump provide
One relatively low discharge forces load slow start, it is to avoid the fast lifting of system pressure, causes the vibrations of main machine structure, makes operation
Person does not feel like oneself and is difficult to control to, and the present invention can not only realize the stable of main pump delivery and accurately control, and simple in construction,
Strong interference immunity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the specific embodiment of the present invention；
Fig. 3 is the structural representation of electric proportional control valve；
Fig. 4 is the structural representation of pressure shut-off valve.
Being labeled as in accompanying drawing: 1-rotor assembly, 2-plunger assembly, 3-electric proportional control valve, 4-ball pivot Anchor plate kit, 5-
Swash plate, 6-connects sheet, 7-feedback rod, 8-shifting block, 9-electric magnet, the automatically controlled spool of 10-, 101-automatically controlled spool step, and 11-feeds back bullet
Spring, 12-regulates spring, and 13-regulates screw, 14-valve body, 15-check valve B, 16-pressure cut off spool, 17-check valve A, 18-
Check valve C, 19-pressure shut-off valve, M-variable cylinder small end, the big end of N-variable cylinder, B-actuator port, S-inlet port, the outer pressure control of X-
Power hydraulic fluid port, L, L1-oil return opening.
Detailed description of the invention
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings, but is not intended as depending on restriction of the present invention
According to.
Embodiment.The axial plunger pump installation of a kind of high accuracy electric proportional control, is constituted as it is shown in figure 1, include electricity ratio
Control valve 3 and there is inlet port S and the main pump body of actuator port B, the variable cylinder small end M of main pump body, variable cylinder big end N and electricity ratio
Example control valve 3 connects, and electric proportional control valve 3 is parallel with pressure shut-off valve 19.
Concrete structure of the present invention can be as in figure 2 it is shown, main pump body can include rotor assembly 1, plunger group 2 and ball pivot Anchor plate kit
4, electric proportional control valve 3 forms one with main pump body.
Described electric proportional control valve 3 is also associated with external control pressure oil circuit, and external control pressure oil circuit one end connects through check valve A17
Actuator port B, the other end is provided with external control pressure oil port X with check valve C18.
Constitute as it is shown on figure 3, described electric proportional control valve 3 includes the automatically controlled spool 10 being arranged in electrically-controlled valve body, automatically controlled
Spool 10 one end is provided with electric magnet 9, and middle part is provided with automatically controlled spool step 101, and the other end is provided with feedback spring 11, feedback spring 11
Being connected with feedback rod 7, shifting block 8 in turn, connect sheet 6, connecting sheet 6 connection has swash plate 5.Connect on described feedback spring 11 and have regulation
Spring 12, regulation spring 12 is provided with regulation screw 13.
Constituting as shown in Figure 4, described pressure shut-off valve 19 includes valve body 14, is provided with pressure cut off spool 16 in valve body 14,
Valve body 14 sidepiece arranges check valve B16.
The control method of the axial plunger pump installation of electric proportional control in high precision, adoption rate electric magnet is by the signal of input
Change into the thrust of magnetic bar, set up electromagnetic force at automatically controlled spool two ends and swash plate rotates and makes feedback spring produce shape between thrust
Become equilibrium relation, according to the change of electric current, discharge capacity is carried out continuous, proportional regulation.
Specifically, the input current controlling electric magnet is gradually increased, and on the left of automatically controlled spool step, valve port is closed, entering variable
The pressure oil of the big end of cylinder is cut off, and meanwhile, opens, force big end pressure to decline on the right side of automatically controlled spool step, and swash plate is to big swing angle
Direction rotates, and after swash plate rotates, passes sequentially through connection sheet, the angular displacement of swash plate is changed into straight-line displacement by shifting block, feedback rod,
Feedback spring power increases with the increase of straight-line displacement amount, closes on the right side of automatically controlled spool step, until swash plate two ends variable cylinder shape
The dynamic balance state of Cheng Xin；The input current controlling electric magnet is gradually reduced, and closes, automatically controlled spool platform on the right side of automatically controlled spool step
Opening on the left of rank, hydraulic oil is the big end of entering variable cylinder on the left of automatically controlled spool step.Governor pressure oil circuit and actuator port outside
Between check valve A and external control hydraulic fluid port are installed check valve C are set, when the pressure of external control hydraulic fluid port is more than or equal to the pressure of actuator port
Time, check valve C opens, and check valve A closes, and swash plate controls the pressure oil that oil sources is external control hydraulic fluid port；When the pressure of actuator port is big
When the pressure of external control hydraulic fluid port, check valve A opens, and check valve C closes, and it is the pressure of actuator port that swash plate now controls oil sources
Oil so that control more accurate.Changing feedback spring and the common pretightning force of regulation spring by regulation screw, pretightning force is more
Greatly, starting point is the highest, and pretightning force is the least, and starting point is the lowest.Pressure shut-off valve is used to realize when electric current rising makes discharge capacity increase
Self-protection when causing system pressure to rise.Pressure shut-off valve is with electric proportional control valve operationally to use check valve B to guarantee
It does not interfere with each other.
The present invention, in order to make the oil pump capacity control when outlet pressure is relatively low more accurate, need to introduce external control pressure oil,
This oil sources should control swash plate pivot angle, can not lead to outlet oil duct again, therefore, disposes outside between governor pressure oil and pump discharge oil
Check valve A and external control hydraulic fluid port arrange check valve C, and when external control pressure oil is more than or equal to outlet pressure oil, check valve C beats
Opening, check valve A closes, and it is external control pressure oil that swash plate controls oil sources；When outlet pressure oil is more than external control pressure oil, check valve A beats
Opening, check valve C closes, and it is pump discharge pressure oil that swash plate now controls oil sources.
Electric magnet power-off or less than variable threshold value time, external control oil on the left of automatically controlled spool step entering variable cylinder big
End, owing to the big end of variable cylinder and variable cylinder small end exist difference in areas, under the active force of pressure oil, swash plate is pushed to zero pivot angle,
Now POF is 0.
When electric magnet input current is gradually increased, on the left of automatically controlled spool step, valve port is closed, the big end of entering variable cylinder
Pressure oil is cut off, and meanwhile, opens, force big end pressure to decline, owing to variable cylinder small end is exported on the right side of automatically controlled spool step
The active force of pressure oil, can cause swash plate two ends to be rotated to big swing angle direction by force unbalance, swash plate, after swash plate rotates, logical
Cross connection sheet, the angular displacement of swash plate is changed into straight-line displacement by shifting block, feedback rod, and feedback spring power is with the increase of straight-line displacement amount
And increase, close on the right side of spool step, until swash plate two ends variable cylinder sets up new dynamic balance state, when the input electricity of electric magnet
When stream is gradually reduced, automatically controlled spool step left and right sides valve port opening and closing is switched, and closes, electrically-controlled valve on the right side of automatically controlled spool step
Opening on the left of core step, hydraulic oil is the big end of entering variable cylinder on the left of automatically controlled spool step.One current value, correspondence one is tiltedly
Dish pivot angle, a most corresponding discharge capacity, the size of electric current, determine the size of the pivot angle of swash plate, and the consecutive variations of electric current is real
Show the stepless variable of pump.
Electric current corresponding from zero delivery to maximum pump discharge is interval, feedback spring rigidity determine, and spring rate
Design then selects with current characteristics according to the power output of electric magnet, and spring rate is the biggest, output flow from 0 to set solid amount interval
The longest, otherwise, the shortest, point is adjusted in interval the rising of electric current to be changed, and can change feedback spring and regulation bullet by regulation screw
The common pretightning force of spring, pretightning force is the biggest, and starting point is the highest, and pretightning force is the least, and starting point is the lowest.
Make discharge capacity when increasing, cause system pressure to rise when electric current rises, need pressure cut off to realize self-protection, then,
The present invention is in parallel pressure shut-off valve, does not operationally interfere with each other with electric proportional control valve in order to ensure pressure shut-off valve, can be respectively
From realizing specific function, having disposed check valve B in product design, when pressure shut-off valve is not opened, check valve B is in closedown shape
State, pressure shut-off valve now does drainback passage and uses；After pressure shut-off valve is opened, check valve B opens, now, the most electric
Control spool is in any position by the function of current, and swash plate all will be pushed into 0 pivot angle under the effect of hydraulic coupling, it is achieved pressure cut off.
Claims (10)
1. the axial plunger pump installation of a high accuracy electric proportional control, it is characterised in that: include electric proportional control valve (3) and tool
There are inlet port (S) and the main pump body of actuator port (B), the variable cylinder small end (M) of main pump body, the big end of variable cylinder (N) and electricity ratio
Control valve (3) connects, and electric proportional control valve (3) is parallel with pressure shut-off valve (19).
The axial plunger pump installation of high accuracy electric proportional control the most according to claim 1, it is characterised in that: described electricity ratio
Example control valve (3) is also associated with external control pressure oil circuit, and external control pressure oil circuit one end connects actuator port (B) through check valve A (17),
The other end is provided with the external control pressure oil port (X) with check valve C (18).
The axial plunger pump installation of high accuracy electric proportional control the most according to claim 1, it is characterised in that: described electricity ratio
Example control valve (3) includes the automatically controlled spool (10) being arranged in electrically-controlled valve body, and automatically controlled spool (10) one end is provided with electric magnet (9),
Middle part is provided with automatically controlled spool step (101), and the other end is provided with feedback spring (11), and feedback spring (11) is connected with feedback rod in turn
(7), shifting block (8), connect sheet (6), connect sheet (6) connect have swash plate (5).
The axial plunger pump installation of high accuracy electric proportional control the most according to claim 3, it is characterised in that: described feedback
The upper connection of spring (11) has regulation spring (12), regulation spring (12) to be provided with regulation screw (13).
The axial plunger pump installation of high accuracy electric proportional control the most according to claim 1, it is characterised in that: described pressure
Stop valve (19) includes valve body (14), is provided with pressure cut off spool (16) in valve body (14), and valve body (14) sidepiece arranges check valve B
(16)。
6. according to the control method of the axial plunger pump installation of the high accuracy electric proportional control described in any one of claim 1-5,
It is characterized in that: the signal of input is changed into the thrust of magnetic bar by adoption rate electric magnet, set up electromagnetism at automatically controlled spool two ends
Power and swash plate rotate and make feedback spring produce formation equilibrium relation between thrust, carry out discharge capacity even according to the change of electric current
Continuous, proportional regulation.
The control method of the axial plunger pump installation of high accuracy electric proportional control the most according to claim 6, its feature exists
In: the input current controlling electric magnet is gradually increased, and on the left of automatically controlled spool step, valve port is closed, the pressure of the big end of entering variable cylinder
Oil is cut-off, meanwhile, opens, force big end pressure to decline on the right side of automatically controlled spool step, and swash plate rotates to big swing angle direction, swash plate
After rotation, pass sequentially through connection sheet, shifting block, feedback rod the angular displacement of swash plate is changed into straight-line displacement, feedback spring power with
The increase of straight-line displacement amount and increase, close on the right side of automatically controlled spool step, until swash plate two ends variable cylinder forms new dynamic balance
State；The input current controlling electric magnet is gradually reduced, and closes, open on the left of automatically controlled spool step on the right side of automatically controlled spool step,
Hydraulic oil is the big end of entering variable cylinder on the left of automatically controlled spool step.
The control method of the axial plunger pump installation of high accuracy electric proportional control the most according to claim 6, its feature exists
In: between governor pressure oil circuit and actuator port, check valve A is installed outside and external control hydraulic fluid port arranges check valve C, when external control hydraulic fluid port
When pressure is more than or equal to the pressure of actuator port, check valve C opens, and check valve A closes, and it is external control hydraulic fluid port that swash plate controls oil sources
Pressure oil；When the pressure of actuator port is more than the pressure of external control hydraulic fluid port, check valve A opens, and check valve C closes, now oblique
It is the pressure oil of actuator port that dish controls oil sources so that control more accurate.
The control method of the axial plunger pump installation of high accuracy electric proportional control the most according to claim 6, its feature exists
In: changing feedback spring and the common pretightning force of regulation spring by regulation screw, pretightning force is the biggest, and starting point is the highest, pretension
Power is the least, and starting point is the lowest.
The control method of the axial plunger pump installation of high accuracy electric proportional control the most according to claim 6, its feature exists
In: use pressure shut-off valve to realize at electric current and rise self-protection when making discharge capacity cause system pressure to rise when increasing；Use
Check valve B guarantees that pressure shut-off valve does not operationally interfere with each other with electric proportional control valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610736360.7A CN106194680B (en) | 2016-08-28 | 2016-08-28 | The axial plunger pump installation and control method of a kind of high-precision electric proportional control |
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| CN201610736360.7A CN106194680B (en) | 2016-08-28 | 2016-08-28 | The axial plunger pump installation and control method of a kind of high-precision electric proportional control |
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| CN106194680A true CN106194680A (en) | 2016-12-07 |
| CN106194680B CN106194680B (en) | 2018-02-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106762970A (en) * | 2016-12-26 | 2017-05-31 | 中航力源液压股份有限公司 | Double ratio control structures and control method of a kind of variable displacement motor |
| CN108425894A (en) * | 2018-05-21 | 2018-08-21 | 长江三峡通航管理局 | A kind of hydraulic device realized synchronous control and adapt to dynamic load |
| 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 |
| CN110848111A (en) * | 2019-11-27 | 2020-02-28 | 力源液压（苏州）有限公司 | Plunger variable pump integrated control system |
| CN112249907A (en) * | 2020-11-11 | 2021-01-22 | 力源液压（苏州）有限公司 | Plunger pump composite control regulator and hoisting machinery |
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| 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 |
| CN110848111A (en) * | 2019-11-27 | 2020-02-28 | 力源液压（苏州）有限公司 | Plunger variable pump integrated control system |
| CN110848111B (en) * | 2019-11-27 | 2021-09-10 | 力源液压（苏州）有限公司 | Plunger variable pump integrated control system |
| CN112249907A (en) * | 2020-11-11 | 2021-01-22 | 力源液压（苏州）有限公司 | Plunger pump composite control regulator and hoisting machinery |
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Application publication date: 20161207 Assignee: Suzhou Liyuan Hydraulic Co.,Ltd. Assignor: AVIC LIYUAN HYDRAULIC Co.,Ltd. Contract record no.: X2023520000007 Denomination of invention: A high-precision electric proportional control axial piston pump device and control method Granted publication date: 20180206 License type: Exclusive License Record date: 20230606 |
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