CN205918570U - Axial plunger pump device of high accuracy electric proportional control - Google Patents
Axial plunger pump device of high accuracy electric proportional control Download PDFInfo
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- CN205918570U CN205918570U CN201620955373.9U CN201620955373U CN205918570U CN 205918570 U CN205918570 U CN 205918570U CN 201620955373 U CN201620955373 U CN 201620955373U CN 205918570 U CN205918570 U CN 205918570U
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- valve
- proportional control
- electric proportional
- high accuracy
- axial plunger
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Abstract
The utility model discloses an axial plunger pump device of high accuracy electric proportional control, constitute including electric proportional control valve (3) and have inlet port (S) and actuator port's (B) the main pump body, the variable jar tip (M) of the main pump body, variable jar main aspects (N) are connected with electric proportional control valve (3), electric proportional control valve (3) go up to connect in parallel has pressure trip valve (19) control method to adopt the proportion electro -magnet to change the signal of inputing into the thrust of magnetism pole, it forms the equilibrium relation to establish at automatically controlled case both ends between electromagnetic force and the rotatory messenger's feedback spring production packing force of sloping cam plate, change according to the electric current is gone on the discharge capacity in succession, proportional adjusts. The utility model discloses the stability and the accurate control that can not only realize main pump delivery, simple structure in addition, interference immunity is strong.
Description
Technical field
This utility model is related to a kind of power-equipment, the axial plunger pump dress of particularly a kind of high accuracy electric proportional control
Put.
Background technology
In elevator and rotary machine, for meeting the accurate control to main pump output flow for the main frame, especially main frame execution
It is to avoid system pressure and flow attack during the action launching stage, the accurate control to main pump swash plate pivot angle is of crucial importance；Require
Control valve can accurately control the discharge capacity of main pump, and at present, existing clino-axis type ratio plunger displacement pump distributing construction can produce larger flow
Pulsation and pressure fluctuation, to controlling, interference is larger and stroking mechanism is complicated huge, and common inclined disc type electric-hydraulic proportion pump is using single
Cylinder Displacement Feedback, in-cylinder pressure is very low, and control accuracy is easily disturbed by housing return pressure, and precision is poor.
Utility model content
The purpose of this utility model is, provides a kind of axial plunger pump installation of high accuracy electric proportional control.This practicality
The stable and accurate of the new discharge capacity not only enabling main pump controls, and structure is simple, strong interference immunity.
The technical solution of the utility model: a kind of axial plunger pump installation of high accuracy electric proportional control it is characterised in that:
Including 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
It is connected with electric proportional control valve, 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 valve element in control valve body, automatically controlled valve element one end is provided with electric magnet, and middle part is provided with automatically controlled valve element step, and the other end is provided with feedback
Spring, feedback spring is connected with feedback rod, shifting block, connection sheet in turn, and connection sheet is connected with swash plate.
In the axial plunger pump installation of aforesaid high accuracy electric proportional control, described feedback spring is connected with regulation bullet
Spring, adjusts spring and is provided with adjusting 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 it is provided with pressure cut off valve element, valve body-side arranges check valve b.
Compared with prior art, this utility model only needs to the input current to main pump and carries out coding-control so that it may by journey
Sequence is controlled to main pump by the various operating modes of main frame, the accurate intelligentized control method of this achievable main frame, and setting pressure is cut simultaneously
Disconnected valve is protected to system.
This utility model can start moment in hoisting heavy or engineering machinery upper-part rotation, under load effect, makes main pump
There is provided one to force load slow start compared with low discharge, it is to avoid the fast lifting of system pressure, lead to the vibrations of main machine structure, make
Operator does not feel like oneself and is difficult to control to, and this utility model not only enables the stable and accurate of the discharge capacity of main pump and controls, and
Structure is simple, strong interference immunity.
Brief description
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of specific embodiment of the utility model；
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- connection sheet, 7- feedback rod, 8- shifting block, 9- electric magnet, the automatically controlled valve element of 10-, 101- automatically controlled valve element step, 11- feeds back bullet
Spring, 12- adjusts spring, 13- adjusting screw, 14- valve body, 15- check valve b, 16- pressure cut off valve element, 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.
Specific embodiment
With reference to the accompanying drawings and examples this utility model is further described, but is not intended as to this utility model
The foundation limiting.
Embodiment.A kind of axial plunger pump installation of high accuracy electric proportional control, is constituted as shown in figure 1, including electric ratio
Control valve 3 compares with having 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
Example control valve 3 connects, and electric proportional control valve 3 is parallel with pressure shut-off valve 19.
This utility model concrete structure can be as shown in Fig. 2 main pump body may include rotor assembly 1, plunger group 2 and ball pivot pressing plate
Assembly 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 shown in figure 3, described electric proportional control valve 3 includes the automatically controlled valve element 10 being arranged in electrically-controlled valve body, automatically controlled
Valve element 10 one end is provided with electric magnet 9, and middle part is provided with automatically controlled valve element step 101, and the other end is provided with feedback spring 11, feedback spring 11
It is connected with feedback rod 7, shifting block 8, connection sheet 6 in turn, connection sheet 6 is connected with swash plate 5.It is connected with regulation on described feedback spring 11
Spring 12, adjusts spring 12 and is provided with adjusting screw 13.
Constitute as shown in figure 4, described pressure shut-off valve 19 includes valve body 14, in valve body 14, be provided with pressure cut off valve element 16,
Valve body 14 sidepiece arranges check valve b16.
Control method of the present utility model, the signal of input is changed into the thrust of magnetic bar by adoption rate electric magnet, in electricity
Electromagnetic force is set up at control valve element two ends and swash plate rotation makes feedback spring produce formation equilibrium relation between thrust, according to electric current
Change carries out continuous, proportional regulation to discharge capacity.
Specifically, the input current of electric magnet is controlled to be gradually increased, on the left of automatically controlled valve element step, valve port is closed, entering variable
The pressure oil at the big end of cylinder is cut off, and, opens on the right side of automatically controlled valve element step meanwhile, forces big end pressure to decline, swash plate is to big swing angle
Direction rotates, and after swash plate rotation, 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 valve element 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 valve element platform on the right side of automatically controlled valve element step
Open on the left of rank, hydraulic oil big end of entering variable cylinder on the left of automatically controlled valve element step.In outer governor pressure oil circuit and actuator port
Between install check valve a and external control hydraulic fluid port setting check valve c, when external control hydraulic fluid port pressure be more than or equal to actuator port pressure
When, 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 swash plate now controls the pressure that oil sources is actuator port
Oil is so that control more accurate.The common pretightning force changing feedback spring by adjusting screw and adjusting spring, pretightning force is got over
Greatly, starting point is higher, and pretightning force is less, and starting point is lower.Realized when electric current rising makes discharge capacity increase using pressure shut-off valve
Self-protection when leading to system pressure to rise.Guarantee pressure shut-off valve with electric proportional control valve operationally using check valve b
It does not interfere with each other.
This utility model, in order that the control when outlet pressure is relatively low for the oil pump capacity is more accurate, need to introduce outer governor pressure
Oil, this oil sources should control swash plate pivot angle, can not lead to outlet oil duct again, therefore, between outer governor pressure oil and pump discharge oil
Check valve a and external control hydraulic fluid port setting check valve c, when external control pressure oil is more than or equal to outlet pressure oil, check valve c are disposed
Open, check valve a closes, it is external control pressure oil that swash plate controls oil sources；The check valve a when outlet pressure oil is more than external control pressure oil
Open, check valve c closes, it is pump discharge pressure oil that swash plate now controls oil sources.
Electric magnet power-off or less than variable threshold value when, outer oil-control entering variable cylinder on the left of automatically controlled valve element step is big
End, because the big end of variable cylinder and variable cylinder small end have 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 valve element step, valve port is closed, the big end of entering variable cylinder
Pressure oil is cut off, and, opens on the right side of automatically controlled valve element step meanwhile, forces big end pressure to decline, because variable cylinder small end is exported
The active force of pressure oil, can lead to swash plate two ends force unbalance, and swash plate, to putting on angular direction rotation, after swash plate rotation, leads to
Cross connection sheet, the angular displacement of swash plate is changed into straight-line displacement by shifting block, feedback rod, feedback spring power is with the increase of straight-line displacement amount
And increase, close on the right side of valve element 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 valve element step left and right sides valve port opening and closing is switched, and closes, electrically-controlled valve on the right side of automatically controlled valve element step
Open on the left of core step, hydraulic oil big end of entering variable cylinder on the left of automatically controlled valve element step.One current value, corresponding one tiltedly
Disk pivot angle, also corresponds to a discharge capacity, the size of electric current simultaneously, determines the size of the pivot angle of swash plate, the consecutive variations of electric current, reality
Show the stepless variable of pump.
From zero delivery to maximum pump discharge, corresponding electric current is interval, is determined by feedback spring rigidity, and spring rate
Then the power output according to electric magnet and current characteristics select for design, and spring rate is bigger, output flow from 0 to set solid amount interval
Longer, conversely, then shorter, interval the rising of electric current to be changed and adjust point, feedback spring can be changed by adjusting screw and adjust bullet
The common pretightning force of spring, pretightning force is bigger, and starting point is higher, and pretightning force is less, and starting point is lower.
Make discharge capacity when increasing, lead to system pressure to rise when electric current rises, need pressure cut off to realize self-protection, then,
This utility model pressure shut-off valve in parallel, in order to ensure pressure shut-off valve is not operationally interfere with each other with electric proportional control valve,
Specific function can each be realized, in product design, dispose check valve b, when pressure shut-off valve is not opened, check valve b is in pass
Closed state, pressure shut-off valve now does drainback passage and uses；After pressure shut-off valve is opened, check valve b opens, now, no
It is in any position by automatically controlled valve element by the function of current, swash plate all will be pushed into 0 pivot angle in the presence of hydraulic coupling, realize pressure and cut
Disconnected.
Claims (5)
1. a kind of axial plunger pump installation of high accuracy electric proportional control it is characterised in that: include electric proportional control valve (3) and tool
There are the main pump body of inlet port (s) and actuator port (b), the big end (n) of variable cylinder small end (m) of main pump body, variable cylinder and electric ratio
Control valve (3) connects, and electric proportional control valve (3) is parallel with pressure shut-off valve (19).
2. high accuracy electric proportional control according to claim 1 axial plunger pump installation 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 external control pressure oil port (x) with check valve c (18).
3. high accuracy electric proportional control according to claim 1 axial plunger pump installation it is characterised in that: described electricity ratio
Example control valve (3) includes the automatically controlled valve element (10) being arranged in electrically-controlled valve body, and automatically controlled valve element (10) one end is provided with electric magnet (9),
Middle part is provided with automatically controlled valve element 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), connection sheet (6), connection sheet (6) is connected with swash plate (5).
4. high accuracy electric proportional control according to claim 3 axial plunger pump installation it is characterised in that: described feedback
Regulation spring (12) is connected with spring (11), adjusts spring (12) and be provided with adjusting screw (13).
5. high accuracy electric proportional control according to claim 1 axial plunger pump installation it is characterised in that: described pressure
Stop valve (19) includes valve body (14), is provided with pressure cut off valve element (16) in valve body (14), and valve body (14) sidepiece arranges check valve b
(16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955373.9U CN205918570U (en) | 2016-08-28 | 2016-08-28 | Axial plunger pump device of high accuracy electric proportional control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620955373.9U CN205918570U (en) | 2016-08-28 | 2016-08-28 | Axial plunger pump device of high accuracy electric proportional control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205918570U true CN205918570U (en) | 2017-02-01 |
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ID=57869514
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620955373.9U Active CN205918570U (en) | 2016-08-28 | 2016-08-28 | Axial plunger pump device of high accuracy electric proportional control |
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| CN (1) | CN205918570U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194680A (en) * | 2016-08-28 | 2016-12-07 | 中航力源液压股份有限公司 | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method |
| CN108533545A (en) * | 2018-06-29 | 2018-09-14 | 潍柴动力股份有限公司 | Hydraulic variable displacement pump mechanical proportional controller and hydraulic variable displacement pump |
| CN110761964A (en) * | 2019-11-13 | 2020-02-07 | 北京凯德福液压技术有限公司 | Digital control proportional plunger variable pump and pump control system |
-
2016
- 2016-08-28 CN CN201620955373.9U patent/CN205918570U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194680A (en) * | 2016-08-28 | 2016-12-07 | 中航力源液压股份有限公司 | The axial plunger pump installation of a kind of high accuracy electric proportional control and control method |
| CN106194680B (en) * | 2016-08-28 | 2018-02-06 | 中航力源液压股份有限公司 | The axial plunger pump installation and control method of a kind of high-precision electric proportional control |
| CN108533545A (en) * | 2018-06-29 | 2018-09-14 | 潍柴动力股份有限公司 | Hydraulic variable displacement pump mechanical proportional controller and hydraulic variable displacement pump |
| CN110761964A (en) * | 2019-11-13 | 2020-02-07 | 北京凯德福液压技术有限公司 | Digital control proportional plunger variable pump and pump control system |
| CN110761964B (en) * | 2019-11-13 | 2023-11-28 | 北京凯德福液压技术有限公司 | Digital control proportional plunger variable pump and pump control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Suzhou Liyuan Hydraulic Co.,Ltd. Assignor: AVIC LIYUAN HYDRAULIC Co.,Ltd. Contract record no.: X2023520000005 Denomination of utility model: A high-precision electric proportional control axial piston pump device Granted publication date: 20170201 License type: Exclusive License Record date: 20230606 |