CN110486340A - A kind of soft start hydrostatic drive system - Google Patents
A kind of soft start hydrostatic drive system Download PDFInfo
- Publication number
- CN110486340A CN110486340A CN201910807449.1A CN201910807449A CN110486340A CN 110486340 A CN110486340 A CN 110486340A CN 201910807449 A CN201910807449 A CN 201910807449A CN 110486340 A CN110486340 A CN 110486340A
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- CN
- China
- Prior art keywords
- mouthfuls
- valve
- mouth
- control
- damping hole
- 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.)
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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
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- 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
- 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
- F15B2211/20576—Systems with pumps with multiple pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of soft start hydrostatic drive system, including motor 1, variable pump 2, motor 3, control system, the control system includes decompression overflow valve, solenoid directional control valve, initial damping hole, cocurrent damping hole, pilot operated directional control valve, accumulator；Motor couples with variable pump.The present invention has following technical effect, and for the present invention first is that control is simple and reliable and stable, Soft Starting Performance is preferable；Second is that optimizing prior art the problem of control oil boosting later period rate of pressure rise reduces, control-oil pressure and system speed can be made to make it in time value；Third is that safeguard protection is complete.Decompression overflow valve is to limit the pressure of control system using purpose, is an integral structure；But for this purpose, decompression overflow valve can be changed to individual overflow valve, pressure reducing valve or only with one of valve.
Description
Technical field
The present invention relates to a kind of hydrostatic drive systems.
Background technique
Pass through the control-oil pressure of electric proportional valve or ratio handle regulated variable mechanism in traditional hydrostatic drives,
So that the change of variable pump swashplate angle realizes the soft start of system to the soft section of variable pumpage and output flow.But this
Due to reliability and control higher cost in complex job environment, versatility exists to be limited kind control mode.Early period is existing
Technology is grown steadily by controlling in oil circuit in the stroking mechanism of enclosed variable pump using accumulator characteristic adjusting control oil pressure, real
Soft start effect is showed, but using this method when occurs controlling oil pressure and system speed can not make it value in time
Situation, there are certain technological deficiencies.
Summary of the invention
The object of the present invention is to provide a kind of soft start hydrostatic drive systems, logical in the variable pump control oil circuit boosting later period
The mode for crossing automatic cocurrent increases fuel delivery, so that control oil pressure and system speed reach target value in time.
The technical scheme is that a kind of soft start hydrostatic drive system, including motor 1, variable pump 2, motor 3,
Control system, the control system include decompression overflow valve, solenoid directional control valve, initial damping hole, cocurrent damping hole, liquid controlled reversing
Valve, accumulator；Motor couples with variable pump；A mouthfuls of variable pump high pressure oil port, B mouthfuls be connected with A mouthfuls, B mouthfuls of motor hydraulic fluid port, variable pump
Ps mouthfuls of slippage pump oil outlet be connected with P mouth of decompression overflow valve, X2 mouthfuls of the control mouth of the variable regulating mechanism of variable pump and storage
Can device, A mouthful of liquid controlled reversing valve outlet, initial damping hole exits it is connected, S mouthfuls in the slippage pump oil inlet of variable pump, 2 mouthfuls of oil return inlet T,
X1 mouthfuls of connected tank T of control mouth；T mouthfuls of connected tank T of overflow port of overflow valve are depressurized, A mouthfuls of overflow valve oil outlet and electromagnetic switch are depressurized
The P mouth of valve is connected, the T mouth connected tank T of solenoid directional control valve, the B mouth and initial damping hole entrance and and flow damping of solenoid directional control valve
Hole entrance is connected；Cocurrent damping hole exits are connected with P mouthfuls of liquid controlled reversing valve inlet.
Pilot operated directional control valve, a mouthfuls of control port be connected with cocurrent damping hole, entrance, pilot operated directional control valve, b mouthfuls of control port with
Accumulator is connected；Pilot operated directional control valve, movement are determined by b mouthfuls of a mouthfuls of its spool both ends control port, control port pressure differences.
The T mouth of solenoid directional control valve is connected with the entrance of oil return damping hole, and the outlet of oil return damping hole and fuel tank T-phase connect.
Decompression overflow valve can be changed to individual overflow valve or pressure reducing valve.
The filter connected between Ps mouthfuls of the slippage pump oil outlet of variable pump and the P mouth for depressurizing overflow valve.
X2 mouthfuls of the variable regulating mechanism control mouth of variable pump is connected to pressure controller.
The present invention has following technical effect, and for the present invention first is that control is simple and reliable and stable, Soft Starting Performance is preferable；Second is that
Prior art is optimized the problem of control oil boosting later period rate of pressure rise reduces, control-oil pressure and system speed can be made timely
Make it value；Third is that safeguard protection is complete.Decompression overflow valve is to limit the pressure of control system using purpose, is integrated
Formula structure；But for this purpose, decompression overflow valve can be changed to individual overflow valve, pressure reducing valve or only with wherein one
Kind valve.
Detailed description of the invention
Fig. 1 is principle of the invention figure.
Specific embodiment
As shown in Figure 1, a kind of soft start hydrostatic drive system, including motor 1, variable pump 2, motor 3, control system,
The control system include decompression overflow valve 6, solenoid directional control valve 7, initial damping hole 10, cocurrent damping hole 8, pilot operated directional control valve 9,
Accumulator 11；Motor 1 couples with variable pump 2；A mouthfuls of 2 high pressure oil port of variable pump, B mouthfuls with 3 hydraulic fluid port of motor A mouthfuls, B mouthfuls be connected, variable
Ps mouthfuls of slippage pump oil outlet of pump 2 are connected with the P mouth of decompression overflow valve 6, X2 mouthfuls of the control mouth of the variable regulating mechanism of variable pump 2
It is connected with accumulator 11, A mouthfuls of the outlet of pilot operated directional control valve 9, the outlet of initial damping hole 10, S mouthfuls in the slippage pump oil inlet of variable pump 2,
X1 mouthfuls of 2 mouthfuls of oil return inlet T, control mouth connected tank T；T mouthfuls of connected tank T of overflow port of overflow valve 6 are depressurized, 6 oil outlet A of overflow valve is depressurized
Mouth is connected with the P of solenoid directional control valve 7 mouth, the T mouth connected tank T of solenoid directional control valve 7, the B mouth and initial damping hole of solenoid directional control valve 7
10 entrances are connected with 8 entrance of cocurrent damping hole；The outlet of cocurrent damping hole 8 is connected for P mouthfuls with 9 entrance of pilot operated directional control valve.
A mouthfuls of 9 control port of pilot operated directional control valve is connected with 10 entrance of cocurrent damping hole, b mouthfuls of 9 control port of pilot operated directional control valve with
Accumulator 11 is connected；The movement of pilot operated directional control valve 9 is determined by b mouthfuls of a mouthfuls of its spool both ends control port, control port pressure differences.
The T mouth of solenoid directional control valve 7 is connected with the entrance of oil return damping hole 5, and the outlet of oil return damping hole 5 and fuel tank T-phase connect.
Decompression overflow valve 6 can be changed to individual overflow valve or pressure reducing valve.
The filter 4 connected between Ps mouthfuls of the slippage pump oil outlet of variable pump 2 and the P mouth for depressurizing overflow valve 6.
X2 mouthfuls of the variable regulating mechanism control mouth of variable pump 2 is connected to pressure controller 12.
The movement of pilot operated directional control valve 9 determines that this pressure difference can by a mouthfuls, b mouthfuls control port pressure differences of its spool both ends control port
It is artificial to set up；In the control oil boosting later period, pilot operated directional control valve 9 is acted, and left side oil circuit is connected, and is increased to accumulator 11 and variable pump
The fuel delivery of 2 variable regulating mechanism mouth X2；The variable regulating mechanism X2 control mouth of variable pump 2 is connected to pressure controller 12, works as inspection
1 protectiveness of automatic control motor is shut down when observing and controlling pressing pressure is more than setting value.
When hydrostatic drive system need to be run, start motor 1, the pressure of Ps mouthfuls of slippage pump oil outlet output of variable pump 2
Power oil enter decompression overflow valve 6 realize effect of easing stress after enter solenoid directional control valve 7 P mouth；When solenoid directional control valve 7 is powered, oil liquid
It is flowed out from the B mouth of solenoid directional control valve 7, respectively enters initial damping hole 10 and cocurrent damping hole 9；Oily entering variable pump is controlled at this time
The X2 mouth of 2 variable regulating mechanisms causes 2 displacement variation of variable pump, realizes the soft start of motor 3；It boosts early period in control oil, by
It is close in 9 both ends control-oil pressure of pilot operated directional control valve, lead to left side oil circuit closing；When control-oil pressure reaches setting value, liquid
Controlling 9 both ends pressure difference of reversal valve reduces so that spool shifts, and left side oil circuit is connected, and increases to 2 variable of accumulator 11 and variable pump
The fuel delivery of the X2 mouth of regulating mechanism controls oily rate of pressure rise and gets a promotion, and control-oil pressure and 3 revolving speed of motor reach mesh in time
Scale value.
When hydrostatic drive system stops, solenoid directional control valve 7 is powered off, and the variable of accumulator 11 and variable pump 2 adjusts machine
X2 mouthfuls of the control mouth controls oil of structure flows back to fuel tank T from initial damping hole 10 through the B/T mouth of solenoid directional control valve 7, in solenoid directional control valve 7
T mouth and oil return damping hole 5 is set on the oil circuit of fuel tank T, control oily rate of pressure reduction and obtain further accurately controlling, so that liquid
Hydraulic driver has better even moderating process when stopping.
Claims (6)
1. a kind of soft start hydrostatic drive system, including motor (1), variable pump (2), motor (3), control system, feature
Be: the control system includes decompression overflow valve (6), solenoid directional control valve (7), initial damping hole (10), cocurrent damping hole
(8), pilot operated directional control valve (9), accumulator (11)；Motor (1) couples with variable pump (2)；High pressure oil port A mouthfuls, B mouthfuls of variable pump (2)
It is connected with hydraulic fluid port A mouthfuls, B mouthfuls of motor (3), Ps mouthfuls of slippage pump oil outlet of variable pump (2) are connected with the P mouth of decompression overflow valve (6),
X2 mouthfuls of control mouth of the variable regulating mechanism of variable pump (2) export A mouthfuls, initial damping with accumulator (11), pilot operated directional control valve (9)
Hole (10) outlet is connected, S mouthfuls in the slippage pump oil inlet of variable pump (2), X1 mouthfuls of 2 mouthfuls of oil return inlet T, control mouth connected tank T；Decompression is overflow
The T mouthfuls of connected tank T of overflow port of valve (6) are flowed, oil outlet A mouthfuls of decompression overflow valve (6) is connected with the P mouth of solenoid directional control valve (7), electromagnetism
The T mouth connected tank T of reversal valve (7), B mouth and initial damping hole (10) entrance and cocurrent damping hole (8) of solenoid directional control valve (7) enter
Mouth is connected；Cocurrent damping hole (8) outlet is connected for entrance P mouthfuls with pilot operated directional control valve (9).
2. a kind of soft start hydrostatic drive system according to claim 1, it is characterised in that: pilot operated directional control valve (9) control
A mouthfuls of liquefaction mouth are connected with cocurrent damping hole (10) entrance, and control port b mouthfuls of pilot operated directional control valve (9) is connected with accumulator (11)；Liquid
The movement of control reversal valve (9) is determined by b mouthfuls of a mouthfuls of its spool both ends control port, control port pressure differences.
3. a kind of soft start hydrostatic drive system according to claim 1, it is characterised in that: the T mouth of solenoid directional control valve 7
It is connected with the entrance of oil return damping hole (5), the outlet of oil return damping hole (5) and fuel tank T-phase connect.
4. a kind of soft start hydrostatic drive system according to claim 1, it is characterised in that: decompression overflow valve (6) can
To be changed to individual overflow valve or pressure reducing valve.
5. a kind of soft start hydrostatic drive system according to claim 1, it is characterised in that: the repairing of variable pump (2)
Pump out the filter (4) connected between Ps mouthfuls of hydraulic fluid port and the P mouth for depressurizing overflow valve (6).
6. a kind of soft start hydrostatic drive system according to claim 1, it is characterised in that: the variable of variable pump (2)
X2 mouthfuls of regulating mechanism control mouth are connected to pressure controller (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807449.1A CN110486340A (en) | 2019-08-29 | 2019-08-29 | A kind of soft start hydrostatic drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910807449.1A CN110486340A (en) | 2019-08-29 | 2019-08-29 | A kind of soft start hydrostatic drive system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110486340A true CN110486340A (en) | 2019-11-22 |
Family
ID=68553674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910807449.1A Pending CN110486340A (en) | 2019-08-29 | 2019-08-29 | A kind of soft start hydrostatic drive system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110486340A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3384027A (en) * | 1966-08-03 | 1968-05-21 | Gen Signal Corp | Hydraulic starting system and valves therefor |
| US20150128584A1 (en) * | 2010-07-22 | 2015-05-14 | Maradyne Corporation | Hydraulic soft start system |
| CN107044458A (en) * | 2017-04-06 | 2017-08-15 | 湘潭市恒欣实业有限公司 | A kind of ropeway fluid power system of use accumulator pressure regulation |
| CN206636858U (en) * | 2017-03-22 | 2017-11-14 | 四川万冠液压技术股份有限公司 | A kind of enclosed variable pump control structure |
| CN210715336U (en) * | 2019-08-29 | 2020-06-09 | 湘潭市恒欣实业有限公司 | Soft start hydrostatic driving system |
-
2019
- 2019-08-29 CN CN201910807449.1A patent/CN110486340A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3384027A (en) * | 1966-08-03 | 1968-05-21 | Gen Signal Corp | Hydraulic starting system and valves therefor |
| US20150128584A1 (en) * | 2010-07-22 | 2015-05-14 | Maradyne Corporation | Hydraulic soft start system |
| CN206636858U (en) * | 2017-03-22 | 2017-11-14 | 四川万冠液压技术股份有限公司 | A kind of enclosed variable pump control structure |
| CN107044458A (en) * | 2017-04-06 | 2017-08-15 | 湘潭市恒欣实业有限公司 | A kind of ropeway fluid power system of use accumulator pressure regulation |
| CN210715336U (en) * | 2019-08-29 | 2020-06-09 | 湘潭市恒欣实业有限公司 | Soft start hydrostatic driving system |
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Address after: 411300 high tech Zone, Shaoshan City, Xiangtan City, Hunan Province Applicant after: Xiangtan Hengxin Industrial Co.,Ltd. Address before: 411300 high tech Zone, Shaoshan City, Xiangtan City, Hunan Province Applicant before: XIANGTAN HENGXIN INDUSTRY Co.,Ltd. |