CN103867508A - Oil supply loop for hydraulic motor of double-wheel mill - Google Patents
Oil supply loop for hydraulic motor of double-wheel mill Download PDFInfo
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- CN103867508A CN103867508A CN201410115115.5A CN201410115115A CN103867508A CN 103867508 A CN103867508 A CN 103867508A CN 201410115115 A CN201410115115 A CN 201410115115A CN 103867508 A CN103867508 A CN 103867508A
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- oil
- hydraulic motor
- pump
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Abstract
The invention discloses an oil supply loop for a hydraulic motor of a double-wheel mill. The oil supply loop is connected with an oil tank. A duplex plunger pump and a magnetic exchange valve are adopted, the duplex plunger pump is provided with a variable pump and a metering pump, and the opening tilt angle of a variable valve is controlled through continuous output of the metering pump via a magnetic exchange valve, so that flow of the variable valve is controlled. When the magnetic exchange valve loses power, the metering pump supplies oil to a control port of the variable pump directly, so that the tilt angle of the variable pump is the maximum, and full-flow output of the variable pump is achieved. When loads increase, system flow decreases continuously, a flow sensor in the system will inform a control system, then the magnetic exchange valve is powered on, oil is stopped from being supplied to the control port of the variable pump, then the variable pump is closed, oil output by the metering pump wholly passes through a second filter and returns to the oil tank, and accordingly a large heating value caused when the loads increase can be avoided, and hidden danger is completely eradiated.
Description
Technical field
The invention belongs to hydraulic power station, be specifically related to a kind of Double-wheel milling oil hydraulic motor oil supply loop.
Background technique
At present, common Double-wheel milling hydraulic power system, in the time starting, drives motor and load by oil hydraulic pump output hydraulic pressure oil, load is at the beginning less, and oil hydraulic pump output flow is large, when after Double-wheel milling work a period of time, load meeting increases, and can make oil hydraulic pump output flow reduce.But, in whole process, because the rotating speed of motor is constant, will make oil hydraulic pump have a large amount of energy to lose, and produce larger heating value, can cause certain hidden danger.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of Double-wheel milling oil hydraulic motor oil supply loop, in the time that load becomes large, can automatically cut off fuel feeding, avoids producing excessive heating value, provides against hidden trouble.
In order to solve the problems of the technologies described above, the present invention adopts following technological scheme:
A kind of Double-wheel milling oil hydraulic motor oil supply loop, be connected with fuel tank, comprise the first oil absorption filter, have first, the first duplex plunger pump of two variable displacement pumps and the first metering pump, the first solenoid directional control valve, the first cooler, the first return filter, the second return filter, the input end of the first oil absorption filter is connected with fuel tank, the output terminal of the first oil absorption filter divides two-way, one tunnel is connected to respectively first of the first duplex plunger pump, after two variable displacement pumps, collaborate again to carry out fuel feeding to the first oil hydraulic motor, another road after the first metering pump to the first solenoid directional control valve, the first delivery outlet of the first solenoid directional control valve through the second return filter to fuel tank, the second delivery outlet is connected to respectively first, two variable displacement pumps, in the time that load is little, the first solenoid directional control valve dead electricity, the first delivery outlet is closed, the second delivery outlet conducting, respectively to first, the pivot angle of two variable displacement pumps is controlled, in the time that load becomes large, the first solenoid directional control valve obtains electric, the second delivery outlet is closed, the first delivery outlet conducting, cut off the fuel feeding of the first oil hydraulic motor.
Describedly have two for the oil supply loop that the oil hydraulic motor of Double-wheel milling rig is carried out to fuel feeding, respectively two of Double-wheel milling rig oil hydraulic motors are carried out to fuel feeding.
Also comprise motor leakage passage, comprise draining filter, the input end of draining filter is connected with the drain tap of oil hydraulic motor respectively, and output terminal is connected to fuel tank.
Described first and second variable delivery side of pump is also connected with respectively one-way valve.
Described the first cooler is forced air cooler.
Adopt technique scheme, this Double-wheel milling oil hydraulic motor oil supply loop has following advantage:
1, oil supply loop has adopted variable displacement pump, and continue to export by metering pump the opening pivot angle that carrys out controlled variable valve through solenoid directional control valve, thereby the uninterrupted of controlled variable valve, in the time of solenoid valve dead electricity, metering pump is directly to variable displacement pump control confession oil, make variable displacement pump pivot angle maximum, make the output of variable displacement pump full flow, when load becomes large, flow system flow constantly reduces, flow transducer in system can be informed control system, solenoid valve is obtained electric, cut off the fuel feeding of variable displacement pump control port, variable displacement pump is closed, and the oil of metering pump output is all got back to fuel tank by the second filter.
2, by cooler is set, carry out cooling to oil circuit.
3, in the time that load becomes large, by automatic cut-out fuel feeding, can avoid producing excessive heating value, provide against hidden trouble.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is the schematic diagram that oil supply loop of the present invention is applied to Double-wheel milling hydraulic power system.
Embodiment
Oil hydraulic motor oil supply loop of the present invention can be applicable in Double-wheel milling hydraulic power system as shown in Figure 1, this Double-wheel milling hydraulic power system comprises fuel tank 1, is connected with fuel tank 1 and respectively first and second oil hydraulic motor 2,3 of Double-wheel milling rig carried out first and second oil supply loop of fuel feeding, wherein:
The first oil supply loop comprises the first oil absorption filter 41, have first, two variable displacement pumps 51, 52 and the first duplex plunger pump of the first metering pump 61, the first solenoid directional control valve Y21, the first cooler 71, the first return filter 81, the input end of the second return filter 82, the first oil absorption filters 41 is connected with fuel tank 1, and the output terminal of the first oil absorption filter 41 divides two-way, and a road is connected to respectively first of the first duplex plunger pump, two variable displacement pumps 51, after 52, collaborate to carry out fuel feeding to the first oil hydraulic motor 1, another road is to the first solenoid directional control valve Y21 after the first metering pump 61 again, and the first delivery outlet of the first solenoid directional control valve Y21 is connected to respectively first through the second return filter 82 to fuel tank 1, the second delivery outlet, two variable displacement pumps 51, 52, in the time that load is little, the first solenoid directional control valve Y21 dead electricity, the first delivery outlet is closed, and the second delivery outlet conducting, respectively to first, two variable displacement pumps 51, the pivot angle of 52 flow control mouths is controlled, and makes first, two variable displacement pumps 51, 52 pivot angle maximum, makes variable displacement pump full flow output, and is undertaken after cooling being back to fuel tank 1 through the first oil return filter 81 again by the first cooler 71, completes fuel feeding circulation, and in the time that load becomes large, flow system flow constantly reduces, flow transducer in system can be informed control system, the first solenoid directional control valve Y21 is obtained electric, the second delivery outlet is closed, the first delivery outlet conducting, cut off the fuel feeding of first and second variable displacement pump 51,52 control ports, first and second variable displacement pump 51,52 is closed without flow output, thereby cut off the fuel feeding of the first oil hydraulic motor 1, and make the oil that the first metering pump 61 is exported all be back to fuel tank by the second return filter 82.
The second oil supply loop and the first oil supply loop are similar, comprise the second oil absorption filter 42, have the 3rd, four variable displacement pumps 53, 54 and the second duplex plunger pump of the second metering pump 62, the second solenoid directional control valve Y23, the second cooler 72, the input end of the 3rd return filter 83, the second oil absorption filters 42 is connected with fuel tank 1, and the output terminal of two oil absorption filters divides two-way, and a road is connected to respectively the 3rd of the second duplex plunger pump, four variable displacement pumps 53, after 54, collaborate to carry out fuel feeding to the second oil hydraulic motor, another road is to the second solenoid directional control valve Y23 after the second metering pump 62 again, and the first delivery outlet of the second solenoid directional control valve Y23 is connected to respectively the 3rd through the second return filter 82 to fuel tank 1, the second delivery outlet, four variable displacement pumps 53, 54, in the time that load is little, the second solenoid directional control valve Y23 dead electricity, the first delivery outlet is closed, and the second delivery outlet conducting, respectively to the 3rd, four variable displacement pumps 53, 54 pivot angle is controlled, and makes the 3rd, four variable displacement pumps 53, 54 pivot angle maximum, makes two variable displacement pump full flows outputs, and is undertaken after cooling being back to fuel tank 1 through the 3rd return filter 83 again by the second cooler 72, completes fuel feeding circulation, in the time that load becomes large, the second solenoid directional control valve Y23 obtains electric, and the second delivery outlet is closed, and the first delivery outlet conducting is cut off the fuel feeding of the second oil hydraulic motor, and made the oil that the second metering pump 62 is exported all be back to fuel tank 1 by the second return filter 82.
This Double-wheel milling hydraulic power system also comprises respectively to first, the second oil hydraulic motor 2, 3 carry out the feed circuit of repairing, same similar with the first oil supply loop, also comprise the 3rd oil absorption filter 43, have the 5th, six variable displacement pumps 55, 56 and the 3rd duplex plunger pump of the 3rd metering pump 62, the 3rd solenoid directional control valve 63, the input end of the 3rd oil absorption filter 43 is connected with fuel tank 1, the output terminal of the 3rd oil absorption filter 43 divides two-way, one tunnel is connected to respectively the 5th of the 3rd duplex plunger pump, six variable displacement pumps 55, 56, the 3rd of the output terminal of the 5th variable displacement pump 55 and the second duplex plunger pump, four variable displacement pumps 53, 54 output terminal collaborates mutually, be that the second oil hydraulic motor 3 carries out repairing, follow-up oil circuit and the second oil supply loop share the second cooler 72 and the second return filter 82, until oil sump tank 1, first of the output terminal of the 6th variable displacement pump 56 and the first duplex plunger pump, two variable displacement pumps 51, 52 output terminal collaborates mutually, be that the first oil hydraulic motor 1 carries out repairing, follow-up oil circuit and the second oil supply loop share the second cooler 72 and the second return filter 82, until oil sump tank 1, after another Lu Jing tri-metering pumps 62 of the output terminal of the 3rd oil absorption filter 43 to the 3rd solenoid directional control valve 63, the first delivery outlet of the 3rd solenoid directional control valve 63 through the second return filter 82 to fuel tank 1, the second delivery outlet is connected to respectively the 5th, six variable displacement pumps 55, 56, in the time that load is little, the 3rd solenoid directional control valve 63 dead electricity, the first delivery outlet is closed, the second delivery outlet conducting, respectively to the 5th, six variable displacement pumps 55, 56 pivot angle is controlled, in the time that load becomes large, the 3rd solenoid directional control valve 63 obtains electric, the second delivery outlet is closed, the first delivery outlet conducting, cut off repairing, and make the oil that the 3rd metering pump 62 is exported all be back to fuel tank 1 by the second return filter 82.
This Double-wheel milling hydraulic power system also comprises motor leakage passage, comprises draining filter 8, the input end of draining filter respectively with first and second hydraulic pressure horse, 2,3 drain tap is connected, output terminal is connected to fuel tank 1, for the draining of oil hydraulic motor.
As an embodiment, the output terminal of described first, second, third and fourth variable displacement pump 51,52,53,54 is also connected with respectively one-way valve Y2A, Y2C, Y3A, Y3C, described the 5th, six variable displacement pumps 55,56 output terminal be also connected with respectively one-way valve Y1A, Y1C.
In addition, described first, second cooler 72 all can adopt forced air cooler, is dispelled the heat by driven by motor fan.Any one motor start-up, two coolers start simultaneously.In the time that oil liquid temperature rises to 55 ℃, by temperature transducer control, forced air cooler starts, and starts working.Oil temperature is by cooling, and while cooling to 50 ℃, cooler quits work.Temperature controller is positioned at fuel tank 1 place, is used for controlling oil temperature.Cooler outlet place is also provided with pressure measuring tie-in, and by this pressure measuring tie-in, user can detect this point pressure by pressure instrument.Because fluid has certain pressure drop by cooler, so being generally this point pressure value, cooler inlet pressure adds 2.5bar.If cooler produces fault, no longer play cooling action, when temperature is during higher than 90 °, system is by temperature transducer sender, and whole system will quit work automatically.
But; those skilled in the art will recognize that; above-mentioned embodiment is exemplary; in order better to make those skilled in the art can understand this patent; can not be interpreted as it is the restriction to this patent protection domain; as long as any being equal to done according to spirit that this patent discloses changes or modify, all fall into the scope of this patent protection.
Claims (5)
1. a Double-wheel milling oil hydraulic motor oil supply loop, be connected with fuel tank, it is characterized in that: comprise the first oil absorption filter, have first, the first duplex plunger pump of two variable displacement pumps and the first metering pump, the first solenoid directional control valve, the first cooler, the first return filter, the second return filter, the input end of the first oil absorption filter is connected with fuel tank, the output terminal of the first oil absorption filter divides two-way, one tunnel is connected to respectively first of the first duplex plunger pump, after two variable displacement pumps, collaborate again to carry out fuel feeding to the first oil hydraulic motor, another road after the first metering pump to the first solenoid directional control valve, the first delivery outlet of the first solenoid directional control valve through the second return filter to fuel tank, the second delivery outlet is connected to respectively first, two variable displacement pumps, in the time that load is little, the first solenoid directional control valve dead electricity, the first delivery outlet is closed, the second delivery outlet conducting, respectively to first, the pivot angle of two variable displacement pumps is controlled, in the time that load becomes large, the first solenoid directional control valve obtains electric, the second delivery outlet is closed, the first delivery outlet conducting, cut off the fuel feeding of the first oil hydraulic motor.
2. Double-wheel milling oil hydraulic motor oil supply loop according to claim 1, is characterized in that: describedly have two for the oil supply loop that the oil hydraulic motor of Double-wheel milling rig is carried out to fuel feeding, respectively two of Double-wheel milling rig oil hydraulic motors are carried out to fuel feeding.
3. Double-wheel milling oil hydraulic motor oil supply loop according to claim 1, is characterized in that: also comprise motor leakage passage, comprise draining filter, the input end of draining filter is connected with the drain tap of oil hydraulic motor respectively, and output terminal is connected to fuel tank.
4. Double-wheel milling oil hydraulic motor oil supply loop according to claim 1, is characterized in that: described first and second variable delivery side of pump is also connected with respectively one-way valve.
5. Double-wheel milling oil hydraulic motor oil supply loop according to claim 1, is characterized in that: described the first cooler is forced air cooler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410115115.5A CN103867508A (en) | 2014-03-26 | 2014-03-26 | Oil supply loop for hydraulic motor of double-wheel mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410115115.5A CN103867508A (en) | 2014-03-26 | 2014-03-26 | Oil supply loop for hydraulic motor of double-wheel mill |
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| CN103867508A true CN103867508A (en) | 2014-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410115115.5A Pending CN103867508A (en) | 2014-03-26 | 2014-03-26 | Oil supply loop for hydraulic motor of double-wheel mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250060A (en) * | 2021-06-15 | 2021-08-13 | 徐州徐工筑路机械有限公司 | Milling machine capable of grooving road surface marking and removing marking |
Citations (7)
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|---|---|---|---|---|
| US4610567A (en) * | 1984-07-18 | 1986-09-09 | Hosking Raymond E | Trench compaction device |
| CN2837372Y (en) * | 2005-11-01 | 2006-11-15 | 长安大学 | Front-wheel hydraulic driving device for milling and planing machine |
| CN201043257Y (en) * | 2007-03-30 | 2008-04-02 | 曲凯 | Waste-front conveying two-wheeled hydraulic driving road miller |
| CN101749210A (en) * | 2009-12-21 | 2010-06-23 | 宁波恒力液压机械制造有限公司 | Integrated axial plunger pump |
| CN202944560U (en) * | 2012-11-27 | 2013-05-22 | 张家港市飞驰机械制造有限公司 | Hydraulic system for controlling float-garbage ship to travel |
| CN103133441A (en) * | 2013-03-19 | 2013-06-05 | 中联重科股份有限公司 | Double hydraulic devices and speed control method, equipment and system thereof |
| CN203809386U (en) * | 2014-03-26 | 2014-09-03 | 上海电气液压气动有限公司 | Dual-wheel milling hydraulic motor oil supplying loop |
-
2014
- 2014-03-26 CN CN201410115115.5A patent/CN103867508A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4610567A (en) * | 1984-07-18 | 1986-09-09 | Hosking Raymond E | Trench compaction device |
| CN2837372Y (en) * | 2005-11-01 | 2006-11-15 | 长安大学 | Front-wheel hydraulic driving device for milling and planing machine |
| CN201043257Y (en) * | 2007-03-30 | 2008-04-02 | 曲凯 | Waste-front conveying two-wheeled hydraulic driving road miller |
| CN101749210A (en) * | 2009-12-21 | 2010-06-23 | 宁波恒力液压机械制造有限公司 | Integrated axial plunger pump |
| CN202944560U (en) * | 2012-11-27 | 2013-05-22 | 张家港市飞驰机械制造有限公司 | Hydraulic system for controlling float-garbage ship to travel |
| CN103133441A (en) * | 2013-03-19 | 2013-06-05 | 中联重科股份有限公司 | Double hydraulic devices and speed control method, equipment and system thereof |
| CN203809386U (en) * | 2014-03-26 | 2014-09-03 | 上海电气液压气动有限公司 | Dual-wheel milling hydraulic motor oil supplying loop |
Non-Patent Citations (1)
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| 韩水生，等: "双轮铣槽机液压系统故障处理一例", 《工程机械》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250060A (en) * | 2021-06-15 | 2021-08-13 | 徐州徐工筑路机械有限公司 | Milling machine capable of grooving road surface marking and removing marking |
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Application publication date: 20140618 |