CN102678683A - Filtering device and engineering machine with same - Google Patents
Filtering device and engineering machine with same Download PDFInfo
- Publication number
- CN102678683A CN102678683A CN2012101204825A CN201210120482A CN102678683A CN 102678683 A CN102678683 A CN 102678683A CN 2012101204825 A CN2012101204825 A CN 2012101204825A CN 201210120482 A CN201210120482 A CN 201210120482A CN 102678683 A CN102678683 A CN 102678683A
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- filter
- control valve
- position control
- oil
- fuel tank
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- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 239000003921 oil Substances 0.000 claims abstract description 105
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 26
- 239000002828 fuel tank Substances 0.000 claims description 53
- 239000000945 filler Substances 0.000 claims description 25
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002411 adverse Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 5
- 238000011109 contamination Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001314 paroxysmal effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Filtration Of Liquid (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a filtering device which is used for filtering hydraulic oil in an oil passage of an oil tank. The filtering device comprises a first filter, as well as a second filter and a direction control valve, wherein the filtration precision of the second filter is greater than that of the first filter, the direction control valve is respectively connected with the first filter and the second filter and arranged in the oil passage of the oil tank, and the direction control valve is further used for controlling the first filter to be communicated with the oil passage of the oil tank under a first working state and controlling the second filter to be communicated with the oil passage of the oil tank under a second working state. The direction control valve of the filtering device disclosed by the invention is respectively connected with the filters with different filtration precision, so that the hydraulic oil can selectively pass through the fine filter for filtration. The filtering device disclosed by the invention has the advantages that the filtration effects and adverse effects of the fine and coarse filtration precision are comprehensively considered, the filters with the different filtration precision are respectively adopted for filtration during working and idling of an engineering machine, the pollution of the hydraulic oil in the oil passage of the oil tank can be effectively controlled and the occurrence probability of failure of the machine can be reduced.
Description
Technical field
The present invention relates generally to engineering machinery field, particularly a kind of filtrating equipment and have the engineering machinery of this filtrating equipment.
Background technique
Along with improving constantly of scientific and technological level, the engineering mechanical device element from the process that is fabricated onto installation, its unfailing performance increasingly high, fault takes place frequently but equipment is in operation still.According to statistics, have influence on the high situation of construction machinery product rate of fault, relevant with oil contamination, and the fault that causes thus accounts for 43%.As remove personal factor, the fault that the oil cleanliness reason causes accounts for 60% of all failure causes.This shows that oil contamination in hydraulic system is the basic reason that engineering machinery breaks down, therefore, strengthen the control of oil contamination is just become the key that improves the engineering mechanical device functional reliability.
It generally is that return tube inserts fuel tank head, the filter of contacting in fuel tank that the engineering machinery oil return is filtered.Generally speaking, for fear of too high back pressure cause energy loss and frequently open fuel tank more renew cartridge cause the secondary pollution of hydraulic oil liquid, existing filter precision is all lower, that common is 10 μ m.The filter core of low filter precision, apparent in view to large particle thing filtering effect, but for the small particles of pollution thing, the particulate filtration that particularly is lower than 10 μ m is limited in one's ability.Though the particulate matter below the 10 μ m can not cause paroxysmal fault to hydraulic system, causes wearing and tearing easily, cause alluvial, increase surface friction drag; When action force is not enough to overcome friction, will cause stuckly, the surface is produced erosive wear; Particularly the wedge angle of valve is as easy as rolling off a log is lost wedge angle by erosion, the performance failure of causes valve, and for solenoid valve, if spool is stuck, coil possibly burnt out, and this thing happens can make Safety performance descend.Yet, if increase the filter precision of filter, can cause too high back pressure again, energy loss is serious, and open continually fuel tank more renew cartridge can cause the secondary pollution of hydraulic oil liquid.
Therefore, need to propose a kind of filtrating equipment and solve the problems referred to above, increase the safety reliability of construction machinery hydraulic system.
Summary of the invention
The present invention aims to provide a kind of filtrating equipment and has the engineering machinery of this filtrating equipment, and the present invention can effectively control the pollution of hydraulic oil in the fuel tank oil circuit, reduces mechanical failure generation probability.
One aspect of the present invention provides a kind of filtrating equipment, is used for filtering the hydraulic oil of fuel tank oil circuit; Comprise first filter; Also comprise second filter and position control valve, the filter precision of said second filter is greater than the filter precision of said first filter, and said position control valve is connected with said second filter with said first filter respectively; And be arranged in the said fuel tank oil circuit, and
Said position control valve is used under its first working state, controlling said first filter and is communicated with said fuel tank oil circuit, and said second filter of control is communicated with said fuel tank oil circuit under its second working state.
Further, said position control valve also is used to control said first filter and is communicated with said fuel tank oil circuit under its second working state.
Further, corresponding its first working state of said position control valve and second working state have first filler opening and second filler opening;
The oil outlet of said first filter is connected with the filler opening of said second filter and first filler opening of said position control valve respectively;
The oil outlet of said second filter is connected with second filler opening of said position control valve.
Further, said second filter also is in series with the 3rd filter, and the filter precision of said second filter is greater than the filter precision of said the 3rd filter, and
Said position control valve also is used to control said the 3rd filter and is communicated with said fuel tank oil circuit under its second working state.
Further, the oil outlet of said the 3rd filter is connected with the filler opening of said second filter.
Further, corresponding its first working state of said position control valve and second working state have first filler opening and second filler opening;
The oil outlet of said first filter is connected with first filler opening of said position control valve;
The oil outlet of said second filter is connected with second filler opening of said position control valve.
Further, corresponding its first working state of said position control valve and second working state have first oil outlet and second oil outlet;
First oil outlet of said position control valve with shown in the filler opening of first filter be connected;
Second oil outlet of said position control valve with shown in the filler opening of the 3rd filter be connected.
Further, said position control valve is a solenoid directional control valve.
Further, said first filter, second filter, the 3rd filter all are connected with relief valve.
Another aspect of the present invention also provides a kind of engineering machinery, has the fuel tank oil circuit, and said fuel tank oil circuit is provided with aforesaid filtrating equipment.
Filtrating equipment of the present invention; Comprise first filter and second filter; The filter precision of second filter is greater than the filter precision of first filter; The direction of passage control valve has realized that two are filtered oil circuits, and position control valve of the present invention is connected with second filter (fine filter) with first filter (coarse-grain filtering device) respectively, makes hydraulic oil in the fuel tank oil circuit optionally through fine filter filtration (for example passing through fine filter when the engineering machinery idling).The present invention takes all factors into consideration the beneficial effect and the harmful effect of coarse-grain filtering device (i.e. first filter) and fine filter (i.e. second filter); Adopt during with idling the filter of different filter precisioies to filter respectively in engineering machinery work; The effectively pollution of Control Engineering mechanical-hydraulic oil reduces mechanical failure generation probability.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is first embodiment's of a filtrating equipment of the present invention schematic representation;
Fig. 2 is the schematic representation of different connectivity scenarios in the fuel tank oil circuit embodiment illustrated in fig. 1;
Fig. 3 is second embodiment's of a filtrating equipment of the present invention schematic representation;
Fig. 4 is the 3rd embodiment's of a filtrating equipment of the present invention schematic representation;
Fig. 5 is the 4th embodiment's of a filtrating equipment of the present invention schematic representation.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Be illustrated in figure 2 as a kind of filtrating equipment of the present invention; Be used for filtering the hydraulic oil of fuel tank oil circuit; Comprise first filter 2, also comprise the filter precision of the filter precision of second filter 3 and position control valve 4, the second filters 3 greater than first filter 2; Position control valve 4 is connected with second filter 3 with first filter 2 respectively; And be arranged in the fuel tank oil circuit, and position control valve 4 is used under its first working state control first filter 2 and is communicated with the fuel tank oil circuit, and under its second working state, controls second filter 3 and be communicated with the fuel tank oil circuit.
Filtrating equipment of the present invention; Comprise the filter precision of the filter precision of first filter 2 and second filter, 3, the second filters 3 greater than first filter 2, direction of passage control valve 4 has realized that two are filtered oil circuit; Under first working state of position control valve 4 (when for example working) corresponding to engineering machinery; Position control valve 4 control first filter 2 is communicated with the fuel tank oil circuit, i.e. the first low filter 2 of fuel tank oil circuit employing filter precision is under second working state of position control valve 4 (for example corresponding to the engineering machinery idling time); Position control valve 4 controls second filter 3 is communicated with the fuel tank oil circuit, and promptly the fuel tank oil circuit adopts the second high filter 3 of filter precision.The present invention takes all factors into consideration the pros and cons of coarse-grain filtering device (i.e. first filter 2) and fine filter (i.e. second filter 3); Adopt the filter of different filter precisioies to filter respectively in the different running statees of engineering machinery (for example working and idling); Can effectively control the pollution of hydraulic oil in the fuel tank oil circuit, reduce mechanical failure generation probability.
Hereinafter is that example goes through various embodiments of the present invention with the solenoid directional control valve, and solenoid directional control valve can be divided into two-position three way, two-position four-way, 3-position 4-way etc. again by working position and number of vias, is that example comes to introduce in detail the present invention below with the two-position four-way valve.
Embodiment 1:
As shown in Figure 1; Position control valve 4 of the present invention can comprise the first oil outlet A, the second oil outlet B and at least one oil inlet P; Wherein, The oil inlet P of position control valve 4 is connected with the hydraulic circuit of engineering machinery, and the first oil outlet A of position control valve 4 is connected with first filter 2, and the second oil outlet B of position control valve 4 is connected with said second filter 3.In shown in Figure 1, filter bits also can be as shown in Figure 2 between position control valve 4 and fuel tank 1, and position control valve 4 is arranged between filter and the fuel tank 1.In addition, scheme illustrated in figures 1 and 2 all is connected on the oil return circuit, and hydraulic oil is back to fuel tank 1 after filtering, and can certainly be connected on the fuel-displaced oil circuit.
In engineering machinery when work,, hydraulic oil is from P mouth approach axis control valve 4, and flow to first filter 2 through the A of direction control valve 4 mouth, and this moment, hydraulic circuit only had the first lower filter 2 of filter precision to be used for filtering.The oil hydraulic circuit load is bigger during work, and first filter 2 can not make hydraulic circuit produce very high back pressure when filtering, and reduces energy loss, raises the efficiency.During the engineering machinery idling; Position control valve 4 electric, hydraulic oil is from P mouth approach axis control valve 4, and flow to the second higher filter 3 of filter precision through the B of direction control valve 4 mouth; This moment, the load of hydraulic circuit was little; Use the filter of high filtering precision to filter, the higher relatively back pressure of generation can not exert an influence to proper functioning, and can effectively remove the more tiny particle in the hydraulic oil.
Embodiment 2:
As shown in Figure 3; Different with the foregoing description 1 is; Second filter 3 of the present invention also is in series with the 3rd filter 5; The filter precision of second filter 3 is greater than the filter precision of the 3rd filter 5, and position control valve 4 also is used to control the 3rd filter 5 and is communicated with the fuel tank oil circuit under its second working state.
When the engineering machinery idling (this moment position control valve 4 in second working state); Position control valve 4; The B mouth of hydraulic oil position control valve 4 flows through the 3rd filter 5 and second filter 3 successively, and the hydraulic oil in the fuel tank oil circuit through the 3rd lower filter 5 of filter precision, filters out larger particles earlier; And then by higher second filter, 3 filtrations of filter precision; Can play the effect of double filtration like this, and on the basis that guarantees the hydraulic circuit filter precision, reduce the frequency of changing fine filter cartridge.
In shown in Figure 3; This filtrating equipment is arranged on the oil return circuit, and as the discussion to embodiment 1, this filtrating equipment can be arranged on the fuel-displaced oil circuit equally; Be that fuel tank 1 is connected with the oil inlet P of position control valve 4, hydraulic oil filters earlier and is used further to power unit is done work.
Need to prove that when the filtrating equipment of present embodiment was used for oil return circuit, second filter 3 was arranged between the 3rd filter 5 and the fuel tank 1; When being used for fuel-displaced oil circuit, the 3rd filter 5 is arranged between second filter 3 and the fuel tank 1.That is to say; The oil outlet that filtrating equipment of the present invention preferably is embodied as the 3rd filter 5 is connected with the filler opening of second filter 3; With in the fuel tank oil circuit, the 3rd filter 5 is in the upper reaches of second filter 3, and hydraulic oil is preferentially filtered through the 3rd low filter 5 of filter precision.
Embodiment 3:
As shown in Figure 4, this embodiment and embodiment's 1 difference exists, and position control valve 4 also is used to control first filter 2 and is communicated with the fuel tank oil circuit under its second working state.In this embodiment, the oil inlet P 1 of position control valve 4 is connected with first filter 2 with second filter 3 successively, and the oil inlet P 2 of position control valve 4 is connected with first filter 2.
After connecting according to this scheme, when engineering machinery work (first working state of corresponding position control valve 4), first filter 2 still keeps and the oil inlet P 1 of position control valve 4 between the oil circuit conducting, hydraulic oil is through lower first filter, 2 filtrations of filtration precision; When the engineering machinery idling (second working state of corresponding position control valve 4); Oil circuit conducting between first filter 2, second filter 3 and the position control valve 4, the hydraulic oil in the fuel tank oil circuit through first filter 2, second filter 3, flow to position control valve 4 through direction control valve 4 oil inlet P 2 in regular turn then; Hydraulic oil can pass through the first lower filter 2 of filter precision earlier; Filter out larger particles, and then filter, reach double filtration effect same as the previously described embodiments equally by the second higher filter 3 of filter precision; And on the basis that guarantees the hydraulic circuit filter precision, reduce the frequency of changing fine filter cartridge.
As a same reason, as shown in Figure 4, this filtrating equipment is arranged on the oil return circuit; Certainly, according to the oil circuit design demand, this filtrating equipment can be arranged on the fuel-displaced oil circuit equally; In conjunction with Fig. 4, promptly above first filter 2, connect fuel tank 1, but not below position control valve 4, connect fuel tank 1.And this direction selector valve 4 also can change with the relative position of combination of filters (first filter 2 and second filter 3), and direction selector valve 4 is positioned at the oil circuit upper reaches of combination of filters or the filtering effect that downstream can not influence filtrating equipment.
In above-mentioned each embodiment; When using filter to filter, be easy to make oil circuit to stop up, the oil circuit internal pressure raises; Damage the components and parts in the oil circuit during for fear of the overpressure of oil circuit; Guarantee oil circuit safety, as preferably, first filter 2 in the above embodiment of the present invention, second filter 3, the 3rd filter 5 all are connected with relief valve.
In addition, in above-mentioned each embodiment, first filter 2 is a coarse-grain filtering device, and its filter precision is preferably 10 μ m; Second filter 3 is the higher fine filter of filter precision, and filter precision is preferably 5 μ m less than 10 μ m.The filter core of filter needs frequent change, renew cartridge more for ease, and when renew cartridge more, do not pollute the hydraulic oil in the fuel tank 1, filtrating equipment of the present invention preferably is arranged on the outside of fuel tank 1.
Certainly, because the filter precision of second filter 3 is high, more the frequency of renew cartridge is bigger for it, for the ease of changing, the present invention also can be only with crossing the outside that the second high filter 3 of filter precision is arranged on fuel tank 1, and first filter 2 is arranged on fuel tank 1 inside.
Embodiment 4:
As shown in Figure 5, first filter 2 and second filter 3 are separately positioned on the inside and outside of fuel tank 1, and direction of passage control valve 4 is chosen in selects for use different filters to filter under the different working state.As shown in the figure, this embodiment is arranged on the oil return circuit, for making when the mechanical idling, filters through filtering the first low filter 2 of precision earlier, and this embodiment also can be arranged on the fuel-displaced oil circuit.Certainly, according to above-mentioned each embodiment's discussion, the upper reaches oil circuit (between second filter 3 and the position control valve 4) of second filter 3 that also can be in the present embodiment is provided with a coarse-grain filtering device and hydraulic oil is filtered in advance.Present embodiment can be obtained filtering effect same as the previously described embodiments.
Correspondingly, the present invention also provides a kind of engineering machinery, has the fuel tank oil circuit, and said fuel tank oil circuit is provided with aforesaid filtrating equipment.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. filtrating equipment is used for filtering the hydraulic oil of fuel tank oil circuit, comprises first filter (2); It is characterized in that; Also comprise second filter (3) and position control valve (4), the filter precision of said second filter (3) is greater than the filter precision of said first filter (2), and said position control valve (4) is connected with said second filter (3) with said first filter (2) respectively; And be arranged in the said fuel tank oil circuit, and
Said position control valve (4) is used under its first working state, controlling said first filter (2) and is communicated with said fuel tank oil circuit, and said second filter of control (3) is communicated with said fuel tank oil circuit under its second working state.
2. filtrating equipment according to claim 1 is characterized in that, said position control valve (4) also is used to control said first filter (2) and is communicated with said fuel tank oil circuit under its second working state.
3. filtrating equipment according to claim 2 is characterized in that, corresponding its first working state of said position control valve (4) and second working state have first filler opening and second filler opening;
The oil outlet of said first filter (2) is connected with the filler opening of said second filter (3) and first filler opening of said position control valve (4) respectively;
The oil outlet of said second filter (3) is connected with second filler opening of said position control valve (4).
4. filtrating equipment according to claim 1 is characterized in that, said second filter (3) also is in series with the 3rd filter (5), and the filter precision of said second filter (3) is greater than the filter precision of said the 3rd filter (5), and
Said position control valve (4) also is used to control said the 3rd filter (5) and is communicated with said fuel tank oil circuit under its second working state.
5. filtrating equipment according to claim 4 is characterized in that, the oil outlet of said the 3rd filter (5) is connected with the filler opening of said second filter (3).
6. filtrating equipment according to claim 5 is characterized in that, corresponding its first working state of said position control valve (4) and second working state have first filler opening and second filler opening;
The oil outlet of said first filter (2) is connected with first filler opening of said position control valve (4);
The oil outlet of said second filter (3) is connected with second filler opening of said position control valve (4).
7. filtrating equipment according to claim 5 is characterized in that, corresponding its first working state of said position control valve (4) and second working state have first oil outlet and second oil outlet;
First oil outlet of said position control valve (4) with shown in the filler opening of first filter (2) be connected;
Second oil outlet of said position control valve (4) with shown in the filler opening of the 3rd filter (5) be connected.
8. according to any described filtrating equipment of claim among the claim 1-7, it is characterized in that said position control valve (4) is a solenoid directional control valve.
9. filtrating equipment according to claim 8 is characterized in that, said first filter (2), second filter (3), the 3rd filter (5) all are connected with relief valve.
10. an engineering machinery has the fuel tank oil circuit, it is characterized in that, said fuel tank oil circuit is provided with like any described filtrating equipment among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120482.5A CN102678683B (en) | 2012-04-23 | 2012-04-23 | Filtering device and engineering machine with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120482.5A CN102678683B (en) | 2012-04-23 | 2012-04-23 | Filtering device and engineering machine with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102678683A true CN102678683A (en) | 2012-09-19 |
| CN102678683B CN102678683B (en) | 2015-05-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210120482.5A Expired - Fee Related CN102678683B (en) | 2012-04-23 | 2012-04-23 | Filtering device and engineering machine with same |
Country Status (1)
| Country | Link |
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| CN (1) | CN102678683B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021249219A1 (en) * | 2020-06-11 | 2021-12-16 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and shock absorber having continuous damping control |
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| KR20080081528A (en) * | 2007-03-05 | 2008-09-10 | 현대중공업 주식회사 | Indicator of hydraulic filter's contamination |
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| CN102102693A (en) * | 2009-12-18 | 2011-06-22 | 上海凯迪克航空工程技术有限公司 | Filtering device of hydraulic oil pump vehicle |
| CN202579469U (en) * | 2012-04-23 | 2012-12-05 | 北京市三一重机有限公司 | Filtering device and engineering machinery provided with filtering device |
-
2012
- 2012-04-23 CN CN201210120482.5A patent/CN102678683B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11230119A (en) * | 1998-02-18 | 1999-08-27 | Hitachi Constr Mach Co Ltd | Traveling hydraulic drive motor driving device |
| KR20080081528A (en) * | 2007-03-05 | 2008-09-10 | 현대중공업 주식회사 | Indicator of hydraulic filter's contamination |
| CN201301844Y (en) * | 2008-11-20 | 2009-09-02 | 徐州重型机械有限公司 | Hydraulic-oil by-passing fine filtering device |
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| WO2021249219A1 (en) * | 2020-06-11 | 2021-12-16 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and shock absorber having continuous damping control |
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| CN102678683B (en) | 2015-05-13 |
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