CN107246415A - A kind of servo-drive band variable pump low speed control hydraulic circuit - Google Patents
A kind of servo-drive band variable pump low speed control hydraulic circuit Download PDFInfo
- Publication number
- CN107246415A CN107246415A CN201710646856.XA CN201710646856A CN107246415A CN 107246415 A CN107246415 A CN 107246415A CN 201710646856 A CN201710646856 A CN 201710646856A CN 107246415 A CN107246415 A CN 107246415A
- Authority
- CN
- China
- Prior art keywords
- oil
- pump
- valve
- low speed
- hydraulic circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention discloses a kind of servo-drive band variable pump low speed control hydraulic circuit, loop oil filter F2 is connected with system oil-out T and system safety valve V1, system oil inlet P prevents back check valve V2 to be connected with system safety valve V1, Variable plunger pump P2 and control oil, Variable plunger pump P2 is connected with servomotor MTR, oil-suction oil filter F1 and oil pump swinging angle control valve V4, and control oil prevents back check valve V2 to be connected with pressure gauge B1, oil pump swinging angle control valve V4, accumulator F3 and relief valve V3.Oil pump capacity is variable adjustable in the present invention, the pivot angle size of oil pump can be adjusted according to different demands, to meet different working condition requirements, the particularly low occasion of rate request, reduce the pivot angle of oil pump to reduce discharge capacity output, the traffic demand of system is met by putting forward high-revolving mode, the speed setting of servo power is based on its limit value, both parameters of matching in the range of its stability contorting.
Description
Technical field
The present invention relates to a kind of hydraulic circuit, especially a kind of servo-drive band variable pump low speed control hydraulic circuit.
Background technology
Modern injection machine often uses hydraulic circuit of the servo power with gear pump (quantitative) pattern, as shown in figure 1, system oil-feed
Mouth P, quantitative gear pump P1 and oil-suction oil filter F1 are sequentially connected, and quantitative gear pump P1 is connected with servomotor MTR, loop oil strain
Device F2 is connected with system oil-out T and system safety valve V1, system safety valve V1 and system oil inlet P and quantitative gear pump
P1 is connected.It is characterized in simple and reliable, most production requirement can be met, but for the specific demand of special industry, there is it
Weak point, for needing the high occasion of low-speed performance, because quantitative gear pump P1 discharge capacities are fixed, can only control its rotating speed to reduce
Flow is exported, and the stability that servomotor MTR is exported for minimum speed has a limit value, less than its stability meeting after this value
It is uncontrollable, so as to influence the stability of system.
The content of the invention
To solve the defect that prior art is present, the present invention provides a kind of servo-drive band variable pump low speed control hydraulic pressure and returned
Road.
To achieve the above object, the present invention uses following technical proposals：
A kind of servo-drive band variable pump low speed control hydraulic circuit, low speed control hydraulic circuit includes system oil inlet
P, oil-suction oil filter F1, servomotor MTR, system oil-out T and return oil filter F2, loop oil filter F2 and system oil-out
T and system safety valve V1 be connected, the low speed control hydraulic circuit also include Variable plunger pump P2, oil pump swinging angle control valve V4,
Relief valve V3, accumulator F3, pressure gauge B1 and control oil prevent back check valve V2, system oil inlet P and system safety valve V1, change
Amount plunger pump P2 and control oil prevent back check valve V2 to be connected, Variable plunger pump P2 and servomotor MTR, oil-suction oil filter F1
And oil pump swinging angle control valve V4 is connected, control oil prevents back check valve V2 and pressure gauge B1, oil pump swinging angle control valve V4, accumulation of energy
Device F3 and relief valve V3 is connected.
Using above-mentioned technical proposal, system oil inlet P, oil-suction oil filter F1, system oil-out T and return oil filter F2 shapes
Into an oil circuit loop.Power matches somebody with somebody Variable plunger pump P2 using servomotor MTR, and oil pump swinging angle control valve V4 can be according to different need
Ask to control the action of small oil tank to go to change oil pump pivot angle, realize that small displacement is exported.Accumulator F3 stores as the pressure of control oil
Energy.Relief valve V3, normality is normally opened, is closed mode during work, accumulator F3 is kept operating pressure.Pressure gauge B1 is used for real
When monitoring and controlling oil pressure.Control oil prevents back check valve V2 from stopping that relief valve V3 controls oil to be back to oil-feed stream after opening
In.
Further, electric Enable Pin D4 is provided with to obtain on oil pump swinging angle control valve V4.
Further, electric same electric motor starting Enable Pin D3 is provided with to obtain on relief valve V3.
Beneficial effect：
Compared to hydraulic circuit of the servo power with gear pump (quantitative) pattern, oil pump capacity is variable adjustable in the present invention
, the pivot angle size of oil pump can be adjusted according to different demands, to meet the field that different working condition requirements, particularly rate request are low
Close, reduce the pivot angle of oil pump to reduce discharge capacity output, the traffic demand of system is met by putting forward high-revolving mode, servo is moved
The speed setting of power is based on its limit value, both parameters of matching in the range of its stability contorting.
Brief description of the drawings
Fig. 1 is that existing conventional servo controls hydraulic loop structure figure.
Fig. 2 is servo-drive of the present invention band variable pump low speed control hydraulic loop structure figure.
Embodiment
The present invention is further described with reference to the accompanying drawings and examples.
A kind of servo-drive band variable pump low speed control hydraulic circuit of the present invention, as shown in Fig. 2 it includes system oil inlet
P, oil-suction oil filter F1, servomotor MTR, system oil-out T, return oil filter F2, Variable plunger pump P2, oil pump swinging angle control
Valve V4, relief valve V3, accumulator F3, pressure gauge B1 and control oil prevent back check valve V2, and loop oil filter F2 and system are fuel-displaced
Mouth T and system safety valve V1 is connected, and system oil inlet P is prevented with system safety valve V1, Variable plunger pump P2 and control oil
Back check valve V2 is connected, Variable plunger pump P2 and servomotor MTR, oil-suction oil filter F1 and oil pump swinging angle control valve V4 phases
Even, control oil prevents back check valve V2 to be connected with pressure gauge B1, oil pump swinging angle control valve V4, accumulator F3 and relief valve V3；
Electric Enable Pin D4 is provided with to obtain on oil pump swinging angle control valve V4；
Electric same electric motor starting Enable Pin D3 is provided with to obtain on relief valve V3.
A kind of servo-drive band variable pump low speed of the present invention controls hydraulic circuit, and its operation principle is：Power uses servo
Motor MTR matches somebody with somebody Variable plunger pump P2, and oil pump pivot angle can be changed by small oil tank, by machinery positioning after the angle setting of change,
Discharge capacity output when ensureing small pivot angle is highly stable, flow oscillation will not be produced because of the change of pivot angle, so as to influence flow waves
Dynamic, the action of small oil tank is controlled by oil pump swinging angle control valve V4, and small oil tank is failure to actuate during normality, i.e., oil pump pivot angle is maximum, is needed
Want to obtain electric Enable Pin D4 during small pivot angle and obtain electric, control oil ejects small oil tank, even if oil pump pivot angle shifts setting pivot angle onto, realizes small
Discharge capacity is exported.Wherein, system oil inlet P, oil-suction oil filter F1, system oil-out T and return oil filter F2 one oil circuit of formation
Loop.Power matches somebody with somebody Variable plunger pump P2 using servomotor MTR, and oil pump swinging angle control valve V4 can control small according to different demands
The action of oil cylinder goes to change oil pump pivot angle, realizes that small displacement is exported.Accumulator F3 is used as the oily pressure accumulation of energy of control.Relief valve
V3, normality is normally opened, obtains electric same electric motor starting Enable Pin D3 and obtains electric, that is, is closed mode when working, accumulator F3 is kept work
Make pressure.Pressure gauge B1 is used for the pressure of real-time inspection and control oil.Control oil prevents back check valve V2 from stopping that relief valve V3 is opened
Control oil is back in oil-feed stream afterwards.
The setting of small pivot angle is determined by each working condition requirement, it is assumed that small displacement requires 10% maximum pump discharge, and just setting is worked as
When the input of computer sets requirement flow is 10% and is following, small pivot angle is switched to, real electrical machinery rotating speed is corresponding to setting data
Rotating speed is multiplied by 10, is 2000 turns of calculating by motor maximum (top) speed, during 10% input requirements, and motor speed is 200 turns, now oil pump
Small pivot angle has been switched to, has now been transferred to 200 with 10, real electrical machinery rotating speed is 2000 turns, that is, maximum speed, and works as rotating speed
During fluctuation, because discharge capacity is small, reality output flowed fluctuation is smaller, in this way in big swing angle, and 200 turns of rotating speed is defeated when the fluctuation of speed
The fluctuation of outflow will relatively small pivot angle high rotating speed when fluctuation will be big it is many, for the high occasion of low speed requirement, such a control
Mode processed can be highly stable.
In summary, the present invention avoids the slow-speed of revolution unstable region of motor, makes motor speed in reasonably stability
Regional work, eliminates a destabilizing factor of servomotor in low speed control；(pump hardware requirement is most in small pivot angle for oil pump
It is more than small pivot angle) when discharge capacity export than huge discharge when fluctuation it is small, be conducive in low speed improve to moving component
Stability；In normal time pressurize, because oil pump pivot angle is small, motor output torque can be substantially reduced, and motor current value now is just
Can be very small, reach the effect of energy-conservation.
Limiting the scope of the invention, one of ordinary skill in the art should be understood that in technical scheme
On the basis of, those skilled in the art need not pay the various modifications that creative work can make or deformation still the present invention's
Within protection domain.
Claims (3)
1. a kind of servo-drive band variable pump low speed control hydraulic circuit, the low speed control hydraulic circuit includes system oil inlet
P, oil-suction oil filter F1, servomotor MTR, system oil-out T and return oil filter F2, loop oil filter F2 and system oil-out
T and system safety valve V1 is connected, it is characterised in that：The low speed control hydraulic circuit also includes Variable plunger pump P2, oil pump
Swinging angle control valve V4, relief valve V3, accumulator F3, pressure gauge B1 and control oil prevent back check valve V2, and system oil inlet P is with being
System safety valve V1, Variable plunger pump P2 and control oil prevent back check valve V2 to be connected, Variable plunger pump P2 and servomotor
MTR, oil-suction oil filter F1 and oil pump swinging angle control valve V4 are connected, and control oil prevents back check valve V2 and pressure gauge B1, oil pump
Swinging angle control valve V4, accumulator F3 and relief valve V3 are connected.
2. servo-drive band variable pump low speed control hydraulic circuit according to claim 1, it is characterised in that：The oil pump
Electric Enable Pin D4 is provided with to obtain on swinging angle control valve V4.
3. servo-drive band variable pump low speed control hydraulic circuit according to claim 1, it is characterised in that：The pressure release
Electric same electric motor starting Enable Pin D3 is provided with to obtain on valve V3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646856.XA CN107246415A (en) | 2017-08-01 | 2017-08-01 | A kind of servo-drive band variable pump low speed control hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710646856.XA CN107246415A (en) | 2017-08-01 | 2017-08-01 | A kind of servo-drive band variable pump low speed control hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107246415A true CN107246415A (en) | 2017-10-13 |
Family
ID=60013100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710646856.XA Pending CN107246415A (en) | 2017-08-01 | 2017-08-01 | A kind of servo-drive band variable pump low speed control hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107246415A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869450A (en) * | 2018-09-12 | 2018-11-23 | 南通润邦重机有限公司 | A kind of low pressure huge discharge variable pump |
| CN116838781A (en) * | 2023-08-30 | 2023-10-03 | 南京讯联液压技术股份有限公司 | Lubrication system and method for long-life wind power generation gear box |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943203A (en) * | 1982-09-03 | 1984-03-10 | Kayaba Ind Co Ltd | Hydraulic pressure control circuit |
| US5845493A (en) * | 1996-05-31 | 1998-12-08 | Dr. Boy Gmbh | Method and apparatus for operating a hydraulic drive |
| CN202412646U (en) * | 2011-12-29 | 2012-09-05 | 浙江申达机器制造股份有限公司 | Multi-pump energy-saving hydraulic loop for large-injection amount injection molding machine |
| CN202623216U (en) * | 2012-05-30 | 2012-12-26 | 无锡海天机械有限公司 | Servo injection molding machine injection flow precise control system |
| CN103267034A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Load sensitive hydraulic system with compensation valve energy recovery function |
| CN204284038U (en) * | 2014-11-25 | 2015-04-22 | 无锡海天机械有限公司 | A kind of energy-saving dynamic system for Servo Injection Molding Machine |
-
2017
- 2017-08-01 CN CN201710646856.XA patent/CN107246415A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5943203A (en) * | 1982-09-03 | 1984-03-10 | Kayaba Ind Co Ltd | Hydraulic pressure control circuit |
| US5845493A (en) * | 1996-05-31 | 1998-12-08 | Dr. Boy Gmbh | Method and apparatus for operating a hydraulic drive |
| CN202412646U (en) * | 2011-12-29 | 2012-09-05 | 浙江申达机器制造股份有限公司 | Multi-pump energy-saving hydraulic loop for large-injection amount injection molding machine |
| CN202623216U (en) * | 2012-05-30 | 2012-12-26 | 无锡海天机械有限公司 | Servo injection molding machine injection flow precise control system |
| CN103267034A (en) * | 2013-05-10 | 2013-08-28 | 浙江大学 | Load sensitive hydraulic system with compensation valve energy recovery function |
| CN204284038U (en) * | 2014-11-25 | 2015-04-22 | 无锡海天机械有限公司 | A kind of energy-saving dynamic system for Servo Injection Molding Machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869450A (en) * | 2018-09-12 | 2018-11-23 | 南通润邦重机有限公司 | A kind of low pressure huge discharge variable pump |
| CN116838781A (en) * | 2023-08-30 | 2023-10-03 | 南京讯联液压技术股份有限公司 | Lubrication system and method for long-life wind power generation gear box |
| CN116838781B (en) * | 2023-08-30 | 2023-11-21 | 南京讯联液压技术股份有限公司 | Lubrication system and method for long-life wind power generation gear box |
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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 |
Application publication date: 20171013 |
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| RJ01 | Rejection of invention patent application after publication |