CN105421522A - Start control device and excavator - Google Patents
Start control device and excavator Download PDFInfo
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- CN105421522A CN105421522A CN201510868774.0A CN201510868774A CN105421522A CN 105421522 A CN105421522 A CN 105421522A CN 201510868774 A CN201510868774 A CN 201510868774A CN 105421522 A CN105421522 A CN 105421522A
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- guide
- bypass
- control device
- engine
- solenoid valve
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Abstract
The invention provides a start control device and an excavator. The start control device comprises a power source, a pilot stroke switch, a pilot bypass electromagnetic valve and a pilot bypass relay. The pilot bypass electromagnetic valve is arranged between the output end of a pilot pump and an oil tank. The controlled end of the pilot bypass electromagnetic valve is connected with the power source through the pilot bypass relay. The output end of the pilot stroke switch is connected with the controlled end of the pilot bypass relay. When an engine is started, the pilot bypass relay is powered on, so that the pilot bypass electromagnetic valve is powered on and acts, and hydraulic oil of the pilot pump flows back to the oil tank; and after the engine is started, the pilot bypass relay is controlled by the pilot stroke switch to be turned off, and the pilot bypass electromagnetic valve is closed. By the adoption of the start control device, when the engine is started, the pilot bypass electromagnetic valve is powered on and acts, and the hydraulic oil of the pilot pump flows back to the oil tank, so that the start load of the engine is reduced, and the start difficulty of the engine is lowered.
Description
Technical field
The present invention relates to mechanical field, particularly relate to a kind of start-control device and excavator.
Background technology
Excavator is one of topmost engineering machinery in engineering construction, has been widely used in the every profession and trades such as building, water conservancy.Its power section is primarily of motor, hydraulic pump composition, and driven by engine oil pump rotates, and the pressure oil of fuel pump outlet distributes to each equipment by work spool, and after pressure oil acting, low pressure gets back to fuel tank.
The motor of excavator, when starting, except bringing onto load (oil pump, fan etc.), also will overcome various component frictional resistance, and hydraulic pump also will be driven to rotate acting simultaneously.Hydraulic pump in excavator is connected with pioneer pump, during engine start, drives Main Hydraulic Pump and pioneer pump loaded starting simultaneously, makes excavator be in state to be operated all the time.
Due in the starting process of excavator, motor can drive pioneer pump loaded starting simultaneously, makes to there is load pressure all the time in the output pipe of pioneer pump, thus adds the starting duty of motor, also increase the energy consumption in engine startup accordingly, be unfavorable for engine start.
Summary of the invention
The invention provides a kind of start-control device and excavator, by using this start-control device to reduce the starting duty of existing digger engine, reducing the problem of engine start difficulty.
The invention provides a kind of start-control device and excavator, comprising: power supply, guide's travel switch, guide's bypass solenoid valve and guide's bypass relay;
Guide's bypass solenoid valve is arranged between guide's delivery side of pump and oil sump, and the controlled end of guide's bypass solenoid valve is connected with power supply by guide's bypass relay, and the output of guide's travel switch is connected with the controlled end of guide's bypass relay;
Guide's bypass solenoid valve is used for opening when being communicated with power supply, and the hydraulic oil that pioneer pump is exported flows back into oil sump;
Guide's bypass relay is used for when the engine is started, the connection of conducting guide bypass solenoid valve and power supply;
Guide's travel switch is used for after engine start completes, and controls guide's bypass relay and disconnects, close to make guide's bypass solenoid valve.
The invention provides a kind of start-control device and excavator, comprising: power supply, guide's travel switch, guide's bypass solenoid valve and guide's bypass relay; Guide's bypass solenoid valve is arranged between guide's delivery side of pump and oil sump, and the controlled end of guide's bypass solenoid valve is connected with power supply by guide's bypass relay, and the output of guide's travel switch is connected with the controlled end of guide's bypass relay; Guide's bypass solenoid valve is used for opening when being communicated with power supply, and the hydraulic oil that pioneer pump is exported flows back into oil sump; Guide's bypass relay is used for when the engine is started, the connection of conducting guide bypass solenoid valve and power supply; Guide's travel switch is used for after engine start completes, and controls guide's bypass relay and disconnects, close to make guide's bypass solenoid valve.The present invention is by arranging start-control device, when engine start, by guide's bypass relay, guide's bypass solenoid valve is connected with power supply, guide's bypass solenoid valve energized action, connect oil circuit, make the hydraulic oil of pioneer pump to be back to oil sump, thus make the pressure of pioneer pump be reduced to zero, effectively reduce the starting duty of motor, also reduce the starting difficulty of motor.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The start-control device starting process schematic diagram that Fig. 1 provides for the embodiment of the present invention one;
The rear schematic diagram of start-control device starting that Fig. 2 provides for the embodiment of the present invention one.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The start-control device starting process schematic diagram that Fig. 1 provides for the embodiment of the present invention one, the rear schematic diagram of start-control device starting that Fig. 2 provides for the embodiment of the present invention one.As shown in Fig. 1 ~ Fig. 2, the start-control device that the present embodiment provides comprises: power supply 1, guide's travel switch 2, guide's bypass relay 3 and guide's bypass solenoid valve 4.Wherein, guide's bypass solenoid valve 4 is arranged between the output of pioneer pump 5 and oil sump 6, and the controlled end of guide's bypass solenoid valve 4 is connected with power supply 1 by guide's bypass relay 3, and the output of guide's travel switch 2 is connected with the controlled end of guide's bypass relay 3.
Pioneer pump 5 can be the hydraulic oil that action bars even load provides lower pressure, and load is such as handle, foot rest in plant equipment, and is attached to the control valve etc. on motor.
Guide's bypass relay 3 for when the engine is started, the connection of conducting guide bypass solenoid valve 4 and power supply 1; Guide's bypass solenoid valve 4 is for opening when being communicated with power supply 1, and the hydraulic oil that pioneer pump 5 is exported flows back into oil sump 6;
Guide's travel switch 2, for after engine start completes, controls guide's bypass relay 3 and disconnects, cut out to make guide's bypass solenoid valve 4.Guide's travel switch 2 can be automatic control switch, be provided with time-delay mechanism, for opening guide's travel switch 2 again after engine start completes certain hour, disconnect to control guide's bypass relay 3, the delay time of this time-delay mechanism can arrange the corresponding time according to the model of pioneer pump 5, as long as can guarantee the hydraulic oil total reflux oil sump 6 in delay time in pioneer pump 5.Guide's travel switch 2 also can be hand control switch, same, after operator pilots engine, just should can open guide's travel switch 2 after corresponding delay time.
Further, the start-control device that the present embodiment provides also comprises engine start loop 7, and engine start loop 7 is connected with guide's bypass relay 3 and guide's travel switch 2;
When the engine is started, engine start loop 7 is connected state;
After engine start completes, guide's travel switch 2 controls engine start loop 7 and disconnects.
Concrete, engine start loop 7 comprises: start and control power supply 71, starting control coil 72 and starter relay 73; Start control power supply 71 by starter relay 73 with start control coil 72 and be connected, the output that controlled end and the guide of starter relay 73 form switch 2 is connected, and starting control coil 72 is for piloting engine.
When the engine starts, start control power supply 71 and be energized to starting control coil 72 by starter relay 73, pilot engine smoothly to make starting control coil 72; When after engine start, closed guide's travel switch 2, makes the controlled end energized action of starter relay 73, disconnects engine start loop 7.
Further, above-mentioned start-control device also comprises precursor overflow valve 8, precursor overflow valve 8 is arranged between the output of pioneer pump 5 and the action bars even load of equipment, precursor overflow valve 8 pairs of pioneer pumps 5 play voltage-stabilizing protection effect, precursor overflow valve 8 is provided with guide's oil pressure relief, when pioneer pump 5 normally works, precursor overflow valve 8 is in closed condition, when the operating pressure of pioneer pump 5 reaches oil pressure relief, precursor overflow valve 8 opens overflow, the hydraulic oil of pioneer pump 5 output is made to be back to oil sump 6, thus pressure in unloading pioneer pump 5, overload protection is carried out to load.
Preferably, in order to the safety of Protection control system even load, avoid pioneer pump 5 to export too high oil pressure to load, the oil pressure relief of precursor overflow valve 8 is set to 3.9MPa.
Further, above-mentioned startup control device also comprises pilot control electromagnetic valve 9.
As shown in Figure 1, when the engine is started, guide's travel switch 2 is in off-state, first start control power supply 71 to be energized to starting control coil 72 by starter relay 73, pilot engine smoothly to make starting control coil 72, simultaneously, guide's bypass relay 3 switches on power 1, guide's bypass relay 3 is in connected state, thus make guide's bypass solenoid valve 4 energized action connect oil circuit, the hydraulic oil in pioneer pump 5 is made to flow back in oil sump 6, output pressure now in pioneer pump 5 reduces, be close to zero, thus reduce the starting duty of motor, motor is more easily started.
As shown in Figure 2, after engine start completes, closed guide's travel switch 2, guide's bypass relay 3 controlled end energized action, cuts off circuit, makes the action of guide's bypass solenoid valve 4 dead electricity, disconnect oil circuit, the oil pressure relief of pioneer pump 5 output re-establishes, and precursor overflow valve 8 normally works, and oil pressure relief reaches 3.9Mpa; While closing stroke switch 2, pilot control electromagnetic valve 9 energized action, connects hydraulic oil, each functional unit of plant equipment can normally be worked.
The start-control device that the present embodiment provides, when engine start, guide's travel switch is in off-state, is connected by guide's bypass solenoid valve by guide's bypass relay with power supply, make guide's bypass solenoid valve energized action, connect oil circuit, be back in oil sump by the hydraulic oil in pioneer pump, the output pressure now in pioneer pump reduces, be close to zero, thus effectively reduce the starting duty of motor, decrease the energy consumption in engine starting process, also make motor more easily start.
Embodiment two
The present embodiment provides a kind of excavator, excavator comprises the start-control device of motor, pioneer pump, oil sump, load and above-described embodiment one, wherein, motor is connected with the starting control coil 72 in engine start loop, be provided with guide's bypass solenoid valve 4 between pioneer pump 5 and oil sump 6, pioneer pump 5 other end is connected with load.Wherein, load can be control valve or electromagnetic valve etc. in the corresponding control system pipeline of excavator or operating grip, by pioneer pump 5 to control system pipeline fuel feeding, controls corresponding main hydraulic control valve events, thus realizes the various actions of excavator.
The digger engine that the present embodiment provides is when starting, oil circuit is communicated with by the guide's bypass solenoid valve in start-control device, pioneer pump output hydraulic pressure oil is made to flow back to oil sump, ensure that the pressure of pioneer pump when the engine start of excavator is zero, thus reduce the starting duty of motor, decrease the energy consumption in excavator starting process, be also more conducive to excavator simultaneously and start.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a start-control device, is characterized in that, comprising: power supply, guide's travel switch, guide's bypass solenoid valve and guide's bypass relay;
Described guide's bypass solenoid valve is arranged between guide's delivery side of pump and oil sump, the controlled end of described guide's bypass solenoid valve is connected with described power supply by described guide's bypass relay, and the output of described guide's travel switch is connected with the controlled end of described guide's bypass relay;
Described guide's bypass solenoid valve is used for opening when being communicated with described power supply, and the hydraulic oil that described pioneer pump is exported flows back into described oil sump;
Described guide's bypass relay is used for when the engine is started, the connection of guide's bypass solenoid valve and power supply described in conducting;
Described guide's travel switch is used for after engine start completes, and controls described guide's bypass relay and disconnects, close to make described guide's bypass solenoid valve.
2. start-control device according to claim 1, is characterized in that, also comprises engine start loop, and described engine start loop is connected with described guide's bypass relay and described guide's travel switch;
When the engine starts, described engine start loop is connected state;
After described engine start completes, described guide's travel switch controls described engine start loop and disconnects.
3. start-control device according to claim 2, is characterized in that, described engine start loop comprises: start and control power supply, starting control coil and starter relay;
Described starting is controlled power supply and is connected with described starting control coil by described starter relay, and the output that controlled end and the described guide of starter relay form switch is connected, and described starting control coil is for starting described motor.
4. the start-control device according to any one of claim 1-3, is characterized in that, described start-control device comprises pilot control electromagnetic valve.
5. the start-control device according to any one of claim 1-3, is characterized in that, also comprises: precursor overflow valve, and described precursor overflow valve is arranged between described guide's delivery side of pump and load.
6. start-control device according to claim 5, is characterized in that, the oil pressure relief of described precursor overflow valve is 3.9MPa.
7. an excavator, it is characterized in that, comprise motor, pioneer pump, oil sump, load and the start-control device described in any one of the claims 1-6, wherein, described motor is connected with the described starting control coil in described engine start loop, be provided with described guide's bypass solenoid valve between described pioneer pump and described oil sump, the described pioneer pump other end is connected with described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868774.0A CN105421522B (en) | 2015-11-30 | 2015-11-30 | Start-control device and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510868774.0A CN105421522B (en) | 2015-11-30 | 2015-11-30 | Start-control device and excavator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105421522A true CN105421522A (en) | 2016-03-23 |
| CN105421522B CN105421522B (en) | 2017-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510868774.0A Expired - Fee Related CN105421522B (en) | 2015-11-30 | 2015-11-30 | Start-control device and excavator |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5919243A (en) * | 1995-12-29 | 1999-07-06 | Volvo Construction Equipment Korea Co., Ltd. | Work brake apparatus for wheel type excavator |
| KR20090120744A (en) * | 2008-05-20 | 2009-11-25 | 현대중공업 주식회사 | The travel control system of the hydraulic wheeled excavator |
| CN101748767A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Excavating machine starting control method and device thereof |
| CN101899850A (en) * | 2010-07-29 | 2010-12-01 | 三一重机有限公司 | Control method and device for reducing starting load of excavator |
| CN102304933A (en) * | 2011-03-16 | 2012-01-04 | 陈海波 | Loader movable arm pilot pressure control system |
| CN203270659U (en) * | 2013-05-13 | 2013-11-06 | 福田雷沃国际重工股份有限公司 | Safe starting control system of excavator |
| CN203559449U (en) * | 2013-09-29 | 2014-04-23 | 天津山河装备开发有限公司 | Travelling and braking control system of grader |
-
2015
- 2015-11-30 CN CN201510868774.0A patent/CN105421522B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5919243A (en) * | 1995-12-29 | 1999-07-06 | Volvo Construction Equipment Korea Co., Ltd. | Work brake apparatus for wheel type excavator |
| KR20090120744A (en) * | 2008-05-20 | 2009-11-25 | 현대중공업 주식회사 | The travel control system of the hydraulic wheeled excavator |
| CN101748767A (en) * | 2009-12-17 | 2010-06-23 | 三一重机有限公司 | Excavating machine starting control method and device thereof |
| CN101899850A (en) * | 2010-07-29 | 2010-12-01 | 三一重机有限公司 | Control method and device for reducing starting load of excavator |
| CN102304933A (en) * | 2011-03-16 | 2012-01-04 | 陈海波 | Loader movable arm pilot pressure control system |
| CN203270659U (en) * | 2013-05-13 | 2013-11-06 | 福田雷沃国际重工股份有限公司 | Safe starting control system of excavator |
| CN203559449U (en) * | 2013-09-29 | 2014-04-23 | 天津山河装备开发有限公司 | Travelling and braking control system of grader |
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| CN105421522B (en) | 2017-10-27 |
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Address after: The development of Shenyang economic and Technological Development Zone of Liaoning Province, No. 28 road 110142 Applicant after: ZHONGCHE SHENYANG LOCOMOTIVE AND VEHICLE CO., LTD. Address before: 110142 Shenyang economic and Technological Development Zone, Liaoning Road, No. 28 Applicant before: China Beiche Group Shenyang Locomotive Vehicle Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171027 Termination date: 20201130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |