CN105065348B - A kind of soft start running gear - Google Patents

A kind of soft start running gear Download PDF

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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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CN
China
Prior art keywords
valve
oil
walking
motor
control
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.)
Expired - Fee Related
Application number
CN201510387187.XA
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Chinese (zh)
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CN105065348A (en
Inventor
杜媛英
金开
袁澎涛
尚长春
张武
郝昱宇
杨宏亮
赵天鹏
耿阳婕
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Xian University of Science and Technology
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Xian University of Science and Technology
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Filing date
Publication date
Application filed by Xian University of Science and Technology filed Critical Xian University of Science and Technology
Priority to CN201510387187.XA priority Critical patent/CN105065348B/en
Publication of CN105065348A publication Critical patent/CN105065348A/en
Application granted granted Critical
Publication of CN105065348B publication Critical patent/CN105065348B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed

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

A kind of soft start running gear
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.
CN201510387187.XA 2015-07-06 2015-07-06 A kind of soft start running gear Expired - Fee Related CN105065348B (en)

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

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
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

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