CN105065348B - A kind of soft start running gear - Google Patents
A kind of soft start running gear Download PDFInfo
- Publication number
- CN105065348B CN105065348B CN201510387187.XA CN201510387187A CN105065348B CN 105065348 B CN105065348 B CN 105065348B CN 201510387187 A CN201510387187 A CN 201510387187A CN 105065348 B CN105065348 B CN 105065348B
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- China
- Prior art keywords
- valve
- oil
- walking
- motor
- switch
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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
- 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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
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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 running gear, the system includes variable pump, constant displacement pump, main overflow valve, precursor overflow valve, travel control valve, walking reversal valve, magnetic valve, ECU, high low speed switch, first pressure switch, second pressure switch, running motor, running motor stroking mechanism and fuel tank, and the oil-out of variable pump is connected with the import of reversal valve of walking, the import of main overflow valve respectively；Oil inlet of the oil-out of constant displacement pump respectively with precursor overflow valve, magnetic valve and travel control valve is connected；Control mouth a, b of the oil-out of travel control valve respectively with reversal valve of walking is connected, control walking reversal valve transposition；The oil-out of magnetic valve is connected with running motor stroking mechanism, and control motor changes discharge capacity.Intelligent control machine of the present invention low rate start in high speed mode, then automatically switches to fast mode again, it is to avoid the immense pressure impact that high-speed starting is brought, and improves the reliability and service life of complete machine.
Description
Technical field
The present invention relates to running gear, and in particular to a kind of soft start running gear.
Background technology
Hydraulic crawler excavator generally have double speed walking mode, by change running motor discharge capacity realize at a high speed (small displacement) and
Two kinds of walking functions of low speed (huge discharge).Excavator complete machine is walked from great and starts impact greatly, particularly in fast mode startup
Under, motor impact pressure is sometimes up to system oil pressure relief, and excessive impact load reduces the reliability of complete machine, had a strong impact on
The service life of running motor and reductor.
In the prior art, by the controlling switch on instrument board, the speed of travel of manual control machine device, once walking mode
It is determined that, then machine starts, walks and braked stopping in this mode, its principle such as Fig. 1, including instrument board, ECU, walking
Motor displacement switching mechanism, main valve stem of walking, original paper, the signal of pressure switch and the high low speed signal of instrument board such as pressure switch
ECU is inputted simultaneously, and ECU is exported to running motor discharge capacity switching device and controlled according to control logic set in advance
Signal processed, controls motor displacement.
The content of the invention
To solve the above problems, the invention provides a kind of soft start running gear, can intelligent control machine at a high speed
Low rate start under pattern, then automatically switch to fast mode again, it is to avoid the immense pressure impact that high-speed starting is brought, and improves
The reliability and service life of complete machine.
To achieve the above object, the technical scheme taken of the present invention is：
A kind of soft start running gear, including variable pump, constant displacement pump, main overflow valve, precursor overflow valve, travel control valve,
Walking reversal valve, magnetic valve, ECU, high low speed switch, first pressure switch, second pressure switch, running motor, walking
Motor stroking mechanism and fuel tank, the oil-out of variable pump are connected with the import of reversal valve of walking, the import of main overflow valve respectively；It is fixed
Oil inlet of the oil-out of pump respectively with precursor overflow valve, magnetic valve and travel control valve is measured to be connected；Travel control valve goes out
Control mouth a, b of the hydraulic fluid port respectively with reversal valve of walking is connected, control walking reversal valve transposition；The oil-out of magnetic valve and walking horse
It is connected up to stroking mechanism, control motor changes discharge capacity；Oil inlet A, the oil return opening B of the oil-out of walking reversal valve respectively with motor
It is connected, motor offer work oil is provided；Walk reversal valve, main overflow valve, precursor overflow valve, travel control valve and magnetic valve
Oil return opening is all connected with fuel tank, and the inlet port of variable pump and constant displacement pump is connected with fuel tank.
It is preferred that, the high low speed switch is used for manual input switches amount signal, using rocker switch.
It is preferred that, the high low speed switch is using the key switch being integrated in display.
Wherein, the on-off model typical hardware filtering process of input, it is not necessary to special software module processing, control
Program can be write based on general industry with software environment such as BODAS, CoDeSys of controller, can also be write with c language,
Special module is not needed to control.
The invention has the advantages that：
By to magnetic valve output voltage, making magnetic valve replace, motor stroking mechanism oil supply gallery is opened, passes through pioneer pump
The pressure oil of offer changes the discharge capacity of motor, realizes the high low speed switching of motor；Low speed is opened intelligent control machine in high speed mode
It is dynamic, fast mode is then automatically switched to again, it is to avoid the immense pressure impact that high-speed starting is brought, improve the reliability of complete machine
And service life.
Brief description of the drawings
Fig. 1 is running gear schematic diagram traditional in the prior art.
Fig. 2 is a kind of system block diagram of soft start running gear of the embodiment of the present invention.
Fig. 3 is a kind of schematic diagram of soft start running gear of the embodiment of the present invention.
Embodiment
In order that objects and advantages of the present invention are more clearly understood, the present invention is carried out with reference to embodiments further
Describe in detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this hair
It is bright.
As shown in Fig. 2 the embodiments of the invention provide a kind of soft start running gear, including variable pump 1, constant displacement pump 2, master
Overflow valve 3, precursor overflow valve 5, travel control valve 4, walking reversal valve 6, magnetic valve 7, ECU 8, high low speed switch 9, the
One pressure switch 10, second pressure switch 11, running motor 13, running motor stroking mechanism 12 and fuel tank 14, variable pump 1 go out
Hydraulic fluid port is connected with the import of reversal valve 6 of walking, the import of main overflow valve 3 respectively；The oil-out of constant displacement pump 2 respectively with guide's overflow
The oil inlet of valve 5, magnetic valve 7 and travel control valve 4 is connected；The oil-out of travel control valve 4 respectively with walking reversal valve 6
Control mouth a, b is connected, and control walking reversal valve 6 replaces；The oil-out of magnetic valve 7 is connected with running motor stroking mechanism 12, control
Motor processed changes discharge capacity；Oil inlet A, the oil return opening B of the oil-out of walking reversal valve 6 respectively with motor are connected, and give motor to provide
Work oil；Walk reversal valve 6, main overflow valve 3, precursor overflow valve 5, travel control valve 4 and magnetic valve 7 oil return opening all with
Fuel tank 14 is connected, and the inlet port of variable pump 1 and constant displacement pump 2 is connected with fuel tank 14.
It is preferred that, the high low speed switch 9 is used for manual input switches amount signal, using rocker switch.
It is preferred that, the high low speed switch 9 is using the key switch being integrated in display.
Wherein, the on-off model typical hardware filtering process of input, it is not necessary to special software module processing, control
Program can be write based on general industry with software environment such as BODAS, CoDeSys of controller, can also be write with c language,
Special module is not needed to control.
This specific implementation electric control logic, if as shown in figure 3, user is manually entered low-speed mode, ECU is not defeated
Go out control signal, motor is maintained at low speed huge discharge state；If user is manually entered fast mode, and pressure switch detects row
Signal is walked, then motor is switched to high speed small displacement state by output control signal after ECU is delayed t seconds.Thus realize
Low rate start under fast mode, then automatically switch to fast mode again, it is to avoid the immense pressure that high-speed starting is brought
Impact, if key parameter delay time t is too short, motor does not accelerate to enough rotating speeds also, switches to small displacement mould
Formula, may cause larger compression shock；If delay time t is long, start-up course can be caused to jolt, influence comfortableness.
Wherein, key parameter delay time t is determined by experiment.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (3)
1. a kind of soft start running gear, it is characterised in that including variable pump (1), constant displacement pump (2), main overflow valve (3), guide
Overflow valve (5), travel control valve (4), walking reversal valve (6), magnetic valve (7), ECU (8), high low speed switch (9), the
One pressure switch (10), second pressure switch (11), running motor (13), running motor stroking mechanism (12) and fuel tank (14),
Import, the import of main overflow valve (3) of the oil-out of variable pump (1) respectively with walking reversal valve (6) are connected；Constant displacement pump (2)
Oil inlet of the oil-out respectively with precursor overflow valve (5), magnetic valve (7) and travel control valve (4) is connected；Travel control valve
(4) control mouth (a, b) of the oil-out respectively with walking reversal valve (6) is connected, control walking reversal valve (6) transposition；Magnetic valve
(7) oil-out is connected with running motor stroking mechanism (12), and control motor changes discharge capacity；The oil-out of walking reversal valve (6)
Oil inlet A, oil return opening B respectively with motor is connected, and gives motor offer work oil；Walk reversal valve (6), main overflow valve (3),
The oil return opening of precursor overflow valve (5), travel control valve (4) and magnetic valve (7) is all connected with fuel tank (14), variable pump (1) and
The inlet port of constant displacement pump (2) is connected with fuel tank (14).
2. a kind of soft start running gear according to claim 1, it is characterised in that the high low speed switch (9) is used for
Manual input switches amount signal, using rocker switch.
3. a kind of soft start running gear according to claim 1, it is characterised in that the high low speed switch (9) uses
It is integrated in the key switch in display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510387187.XA CN105065348B (en) | 2015-07-06 | 2015-07-06 | A kind of soft start running gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510387187.XA CN105065348B (en) | 2015-07-06 | 2015-07-06 | A kind of soft start running gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105065348A CN105065348A (en) | 2015-11-18 |
| CN105065348B true CN105065348B (en) | 2017-10-27 |
Family
ID=54494819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510387187.XA Expired - Fee Related CN105065348B (en) | 2015-07-06 | 2015-07-06 | A kind of soft start running gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105065348B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112127416A (en) * | 2020-10-10 | 2020-12-25 | 徐州徐工矿业机械有限公司 | Novel walking motor unblock and high-low speed control hydraulic system |
| CN114215803A (en) * | 2021-12-23 | 2022-03-22 | 山河智能装备股份有限公司 | Engineering machine, walking system and control method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4136041B2 (en) * | 1997-12-04 | 2008-08-20 | 日立建機株式会社 | Hydraulic drive device for hydraulic working machine |
| KR101155718B1 (en) * | 2004-12-31 | 2012-06-12 | 두산인프라코어 주식회사 | An apparatus for controlling the starting speed of an excavator |
| KR100974279B1 (en) * | 2008-03-27 | 2010-08-06 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | travel system for heavy equipment |
| CN104196779B (en) * | 2014-08-14 | 2016-04-20 | 中国重型机械研究院股份公司 | A kind of high low speed switches oil hydraulic motor control gear |
-
2015
- 2015-07-06 CN CN201510387187.XA patent/CN105065348B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN105065348A (en) | 2015-11-18 |
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