CN103867509B - A kind of Double-wheel milling hydraulic power system - Google Patents
A kind of Double-wheel milling hydraulic power system Download PDFInfo
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- CN103867509B CN103867509B CN201410115123.XA CN201410115123A CN103867509B CN 103867509 B CN103867509 B CN 103867509B CN 201410115123 A CN201410115123 A CN 201410115123A CN 103867509 B CN103867509 B CN 103867509B
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Abstract
Disclosure one Double-wheel milling hydraulic power system, including fuel tank, to Double-wheel milling rig first respectively, two hydraulic motors carry out the first of fuel feeding, two oil supply loops, two oil supply loops have been respectively adopted variable pump, and continue to export the opening pivot angle carrying out control variable valve through solenoid directional control valve by dosing pump, thus the uninterrupted of control variable valve, when electromagnetic valve dead electricity, dosing pump directly controls confession oil to variable pump, make variable pump pivot angle maximum, variable pump full flow is made to export, when load becomes big, flow system flow constantly reduces, flow transducer in systems can inform control system, electromagnetic valve is made to obtain electric, cut off the fuel feeding of variable pump control port, variable pump is closed, and the oil that dosing pump exports is returned to fuel tank all through the second filter, it is thus possible to avoid answering load to become big and produce excessive caloric value, provide against hidden trouble。
Description
Technical field
The invention belongs to hydraulic power station, be specifically related to a kind of Double-wheel milling hydraulic power system。
Background technology
At present, common Double-wheel milling hydraulic power system, when starting, is driven motor and load by hydraulic pump output hydraulic pressure oil, load is less at the beginning, and hydraulic pump output flow is big, after Double-wheel milling works a period of time, load can increase, and hydraulic pump output flow can be made to reduce。But, in whole process, owing to the rotating speed of motor is constant, hydraulic pump will be made to have substantial amounts of energy to lose, and produce bigger caloric value, certain hidden danger can be caused。
Summary of the invention
The technical problem to be solved is to provide a kind of Double-wheel milling hydraulic power system, when load becomes big, it is possible to automatically cut off fuel feeding, it is to avoid produce excessive caloric value, provide against hidden trouble。
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that:
A kind of Double-wheel milling hydraulic power system, including fuel tank, first and second oil supply loop that respectively first and second hydraulic motor of Double-wheel milling rig is carried out fuel feeding,
First oil supply loop includes the first oil absorption filter, have first, first duplex plunger displacement pump of two variable pumps and the first dosing pump, first solenoid directional control valve, first cooler, first return filter, second return filter, the input of the first oil absorption filter is connected with fuel tank, the outfan of the first oil absorption filter divides two-way, one tunnel is respectively connecting to the first of the first duplex plunger displacement pump, collaborate again after two variable pumps to the first hydraulic motor to carry out fuel feeding, another road after the first dosing pump to the first solenoid directional control valve, first delivery outlet of the first solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to first, two variable pumps, when load is little, first solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to first, the pivot angle of two variable pumps is controlled, when load becomes big, first solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off the fuel feeding of the first hydraulic motor；
Second oil supply loop includes the second oil absorption filter, have the 3rd, second duplex plunger displacement pump of four variable pumps and the second dosing pump, second solenoid directional control valve, second cooler, 3rd return filter, the input of the second oil absorption filter is connected with fuel tank, the outfan of two oil absorption filters divides two-way, one tunnel is respectively connecting to the 3rd of the second duplex plunger displacement pump, collaborate again after four variable pumps to the second hydraulic motor to carry out fuel feeding, another road after the second dosing pump to the second solenoid directional control valve, first delivery outlet of the second solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to the 3rd, four variable pumps, when load is little, second solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to the 3rd, the pivot angle of four variable pumps is controlled, when load becomes big, second solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off the fuel feeding of the second hydraulic motor。
Also include respectively to first, second hydraulic motor carries out the feed circuit of repairing, including the 3rd oil absorption filter, have the 5th, 3rd duplex plunger displacement pump of six variable pumps and the 3rd dosing pump, 3rd solenoid directional control valve, the input of the 3rd oil absorption filter is connected with fuel tank, the outfan of the 3rd oil absorption filter divides two-way, one tunnel is respectively connecting to the 5th of the 3rd duplex plunger displacement pump, six variable pumps, the 3rd of 5th variable delivery side of pump and the second duplex plunger displacement pump, four variable delivery side of pumps collaborate mutually, it is that the second hydraulic motor carries out repairing, the first of 6th variable delivery side of pump and the first duplex plunger displacement pump, two variable delivery side of pumps collaborate mutually, it is that the first hydraulic motor carries out repairing, to the 3rd solenoid directional control valve after another Lu Jing tri-dosing pump, first delivery outlet of the 3rd solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to the 5th, six variable pumps, when load is little, 3rd solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to the 5th, the pivot angle of six variable pumps is controlled, when load becomes big, 3rd solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off repairing。
Also including motor leakage passage, including draining filter, the input of draining filter is connected with the drain tap of first and second hydraulic motor respectively, and outfan is connected to fuel tank。
Described first, second, third and fourth variable delivery side of pump has been also respectively connected with check valve。
Described first, second cooler is forced air cooler。
Adopting technique scheme, this Double-wheel milling hydraulic power system has several advantages that
1, two oil supply loops have been respectively adopted variable pump, and continue to export the opening pivot angle carrying out control variable valve through solenoid directional control valve by dosing pump, thus the uninterrupted of control variable valve, when electromagnetic valve dead electricity, dosing pump directly controls confession oil to variable pump, make variable pump pivot angle maximum, variable pump full flow is made to export, when load becomes big, flow system flow constantly reduces, flow transducer in systems can inform control system, electromagnetic valve is made to obtain electric, cut off the fuel feeding of variable pump control port, variable pump is closed, and the oil that dosing pump exports is returned to fuel tank all through the second filter。
Two oil supply loops are in like manner carried out repairing by 2 a, feed circuit respectively, when load becomes big, are cut off the fuel feeding of variable pump control port equally by electromagnetic valve, close repairing。
3, by arranging cooler, oil circuit is cooled down。
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is the asphalt principle figure of Double-wheel milling hydraulic power system of the present invention。
Detailed description of the invention
The Double-wheel milling hydraulic power system 1 of the present invention is as it is shown in figure 1, it includes fuel tank 1, respectively first and second oil supply loop to first and second hydraulic motor 2,3 fuel feeding of Double-wheel milling rig, wherein:
First oil supply loop includes the first oil absorption filter 41, have first, two variable pumps 51, 52 and the first first duplex plunger displacement pump of dosing pump 61, first solenoid directional control valve Y21, first cooler 71, first return filter 81, second return filter 82, the input of the first oil absorption filter 41 is connected with fuel tank 1, and the outfan of the first oil absorption filter 41 divides two-way, and a road is respectively connecting to the first of the first duplex plunger displacement pump, two variable pumps 51, collaborating after 52 to the first hydraulic motor 1 to carry out fuel feeding, another road is to the first solenoid directional control valve Y21 after the first dosing pump 61, and first delivery outlet of the first solenoid directional control valve Y21 is through the second return filter 82 to fuel tank 1, and the second delivery outlet is respectively connecting to first again, two variable pumps 51, 52, when 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 pumps 51, the pivot angle of 52 flow-control mouths is controlled so that first, two variable pumps 51, the pivot angle of 52 is maximum, makes variable pump full flow export, and passes through to be back to fuel tank 1 then through the first oil return filter 81 after the first cooler 71 cools down, and completes for oil circulation；And when load becomes big, flow system flow constantly reduces, flow transducer in systems can inform control system, making the first solenoid directional control valve Y21 obtain electric, the second delivery outlet is closed, the first delivery outlet conducting, cut off the fuel feeding of first and second variable pump 51,52 control port, first and second variable pump 51,52 being closed export without flow, thus cutting off the fuel feeding of the first hydraulic motor 1, and making the oil of the first dosing pump 61 output be back to fuel tank all through the second return filter 82。
Second oil supply loop and the first oil supply loop are similar, including the second oil absorption filter 42, have the 3rd, four variable pumps 53, 54 and the second second duplex plunger displacement pump of dosing pump 62, second solenoid directional control valve Y23, second cooler 72, 3rd return filter 83, the input of the second oil absorption filter 42 is connected with fuel tank 1, and the outfan of two oil absorption filters divides two-way, and a road is respectively connecting to the 3rd of the second duplex plunger displacement pump, four variable pumps 53, collaborating after 54 to the second hydraulic motor to carry out fuel feeding, another road is to the second solenoid directional control valve Y23 after the second dosing pump 62, and first delivery outlet of the second solenoid directional control valve Y23 is through the second return filter 82 to fuel tank 1, and the second delivery outlet is respectively connecting to the 3rd again, four variable pumps 53, 54, when 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 pumps 53, the pivot angle of 54 is controlled so that the 3rd, four variable pumps 53, the pivot angle of 54 is maximum, makes two variable pump full flow outputs, and passes through to be back to fuel tank 1 then through the 3rd return filter 83 after the second cooler 72 cools down, completes for oil circulation；When load becomes big, the second solenoid directional control valve Y23 obtains electric, and the second delivery outlet is closed, the first delivery outlet conducting, cuts off the fuel feeding of the second hydraulic motor, and makes the oil of the second dosing pump 62 output be back to fuel tank 1 all through the second return filter 82。
This Double-wheel milling hydraulic power system also includes respectively to first, second hydraulic motor 2, 3 feed circuits carrying out repairing, same similar with the first oil supply loop, also the 3rd oil absorption filter 43 is included, have the 5th, six variable pumps 55, 56 and the 3rd the 3rd duplex plunger displacement pump of dosing pump 62, 3rd solenoid directional control valve 63, the input of the 3rd oil absorption filter 43 is connected with fuel tank 1, the outfan of the 3rd oil absorption filter 43 divides two-way, one tunnel is respectively connecting to the 5th of the 3rd duplex plunger displacement pump, six variable pumps 55, 56, the outfan of the 5th variable pump 55 and the 3rd of the second duplex plunger displacement pump the, four variable pumps 53, the outfan of 54 collaborates mutually, it is that the second 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, the outfan of the 6th variable pump 56 and the first of the first duplex plunger displacement pump, two variable pumps 51, the outfan of 52 collaborates mutually, it is that the first 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, to the 3rd solenoid directional control valve 63 after another Lu Jing tri-dosing pump 62 of the outfan of the 3rd oil absorption filter 43, first delivery outlet of the 3rd solenoid directional control valve 63 is through the second return filter 82 to fuel tank 1, second delivery outlet is respectively connecting to the 5th, six variable pumps 55, 56, when load is little, 3rd solenoid directional control valve 63 dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to the 5th, six variable pumps 55, the pivot angle of 56 is controlled, when load becomes big, 3rd solenoid directional control valve 63 obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off repairing, and make the oil of the 3rd dosing pump 62 output be back to fuel tank 1 all through the second return filter 82。
This Double-wheel milling hydraulic power system also includes motor leakage passage, including draining filter 8, the input of draining filter respectively with first and second hydraulic pressure horse, the drain tap of 2,3 be connected, outfan is connected to fuel tank 1, for the draining of hydraulic motor。
As an embodiment, the outfan of described first, second, third and fourth variable pump 51,52,53,54 has been also respectively connected with check valve Y2A, Y2C, Y3A, Y3C, described five, the six variable pumps 55,56 outfan be also respectively connected with check valve Y1A, Y1C。
It addition, described first, second cooler 72 all can adopt forced air cooler, driven by motor fan dispel the heat。Any one motor start-up, two coolers start simultaneously。When oil liquid temperature rises to 55 DEG C, by temperature sensor control, forced air cooler starts, and starts working。Oil temperature is by cooling down, and when cooling to 50 DEG C, cooler quits work。Temperature controller is positioned at fuel tank 1 place, is used for controlling oil temperature。Cooler outlet place is additionally provided with pressure measuring tie-in, and by this pressure measuring tie-in, this point pressure can be detected by user by manometer。Owing to fluid has certain pressure drop by cooler, so cooler inlet pressure is generally this presses force value plus 2.5bar。If cooler produces fault, no longer playing cooling effect, when temperature is higher than 90 °, system passes through temperature sensor sender, and whole system will be automatically stopped work。
But; those skilled in the art will recognize that; above-mentioned detailed description of the invention is illustrative of; it is to better make to skilled artisans appreciate that this patent; it is not to be construed as the restriction to this patent protection domain; as long as any equivalent change made according to the disclosed spirit of this patent or modification, each fall within the scope of this patent protection。
Claims (5)
1. a Double-wheel milling hydraulic power system, it is characterised in that: include fuel tank, respectively first and second hydraulic motor of Double-wheel milling rig is carried out first and second oil supply loop of fuel feeding,
First oil supply loop includes the first oil absorption filter, have first, first duplex plunger displacement pump of two variable pumps and the first dosing pump, first solenoid directional control valve, first cooler, first return filter, second return filter, the input of the first oil absorption filter is connected with fuel tank, the outfan of the first oil absorption filter divides two-way, one tunnel is respectively connecting to the first of the first duplex plunger displacement pump, collaborate again after two variable pumps to the first hydraulic motor to carry out fuel feeding, another road after the first dosing pump to the first solenoid directional control valve, first delivery outlet of the first solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to first, two variable pumps, when load is little, first solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to first, the pivot angle of two variable pumps is controlled, when load becomes big, first solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off the fuel feeding of the first hydraulic motor；
Second oil supply loop includes the second oil absorption filter, have the 3rd, second duplex plunger displacement pump of four variable pumps and the second dosing pump, second solenoid directional control valve, second cooler, 3rd return filter, the input of the second oil absorption filter is connected with fuel tank, the outfan of two oil absorption filters divides two-way, one tunnel is respectively connecting to the 3rd of the second duplex plunger displacement pump, collaborate again after four variable pumps to the second hydraulic motor to carry out fuel feeding, another road after the second dosing pump to the second solenoid directional control valve, first delivery outlet of the second solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to the 3rd, four variable pumps, when load is little, second solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to the 3rd, the pivot angle of four variable pumps is controlled, when load becomes big, second solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off the fuel feeding of the second hydraulic motor。
2. Double-wheel milling hydraulic power system according to claim 1, it is characterized in that: also include respectively to first, second hydraulic motor carries out the feed circuit of repairing, including the 3rd oil absorption filter, have the 5th, 3rd duplex plunger displacement pump of six variable pumps and the 3rd dosing pump, 3rd solenoid directional control valve, the input of the 3rd oil absorption filter is connected with fuel tank, the outfan of the 3rd oil absorption filter divides two-way, one tunnel is respectively connecting to the 5th of the 3rd duplex plunger displacement pump, six variable pumps, the 3rd of 5th variable delivery side of pump and the second duplex plunger displacement pump, four variable delivery side of pumps collaborate mutually, it is that the second hydraulic motor carries out repairing, the first of 6th variable delivery side of pump and the first duplex plunger displacement pump, two variable delivery side of pumps collaborate mutually, it is that the first hydraulic motor carries out repairing, to the 3rd solenoid directional control valve after another Lu Jing tri-dosing pump, first delivery outlet of the 3rd solenoid directional control valve is through the second return filter to fuel tank, second delivery outlet is respectively connecting to the 5th, six variable pumps, when load is little, 3rd solenoid directional control valve dead electricity, first delivery outlet is closed, second delivery outlet conducting, respectively to the 5th, the pivot angle of six variable pumps is controlled, when load becomes big, 3rd solenoid directional control valve obtains electric, second delivery outlet is closed, first delivery outlet conducting, cut off repairing。
3. Double-wheel milling hydraulic power system according to claim 1, it is characterised in that: also including motor leakage passage, including draining filter, the input of draining filter is connected with the drain tap of first and second hydraulic motor respectively, and outfan is connected to fuel tank。
4. Double-wheel milling hydraulic power system according to claim 1, it is characterised in that: described first, second, third and fourth variable delivery side of pump has been also respectively connected with check valve。
5. Double-wheel milling hydraulic power system according to claim 1, it is characterised in that: described first, second cooler is forced air cooler。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410115123.XA CN103867509B (en) | 2014-03-26 | 2014-03-26 | A kind of Double-wheel milling hydraulic power system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410115123.XA CN103867509B (en) | 2014-03-26 | 2014-03-26 | A kind of Double-wheel milling hydraulic power system |
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| CN103867509A CN103867509A (en) | 2014-06-18 |
| CN103867509B true CN103867509B (en) | 2016-06-22 |
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