CN102678683B - Filtering device and engineering machine with same - Google Patents
Filtering device and engineering machine with same Download PDFInfo
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- CN102678683B CN102678683B CN201210120482.5A CN201210120482A CN102678683B CN 102678683 B CN102678683 B CN 102678683B CN 201210120482 A CN201210120482 A CN 201210120482A CN 102678683 B CN102678683 B CN 102678683B
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- filter
- control valve
- oil
- position control
- working state
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- 238000001914 filtration Methods 0.000 title claims abstract description 34
- 239000003921 oil Substances 0.000 claims abstract description 105
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims description 25
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002411 adverse Effects 0.000 abstract 1
- 239000002828 fuel tank Substances 0.000 description 17
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001314 paroxysmal effect Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
- Filtration Of Liquid (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, engineering mechanical device element from the process being fabricated onto installation, its unfailing performance more and more higher, the still Frequent Troubles but equipment is in operation.According to statistics, have influence on the situation that construction machinery product rate of fault is high, relevant with oil contamination, and the fault caused thus accounts for 43%.As removed personal factor, the fault that oil cleanliness reason causes, accounts for 60% of all failure causes.As can be seen here, oil contamination in hydraulic system is the most basic reason that engineering machinery breaks down, and therefore, strengthens just becoming to the control of oil contamination the key improving engineering mechanical device functional reliability.
Engineering machinery oil return filter is generally return tube access fuel tank head in fuel tank, a filter of contacting.Generally, in order to avoid too high back pressure causes energy loss, and frequent open fuel tank more renew cartridge cause the secondary pollution of hydraulic oil liquid, existing filter precision is all lower, and common is 10 μm.The filter core of low filter precision, obvious to large particle thing filtering effect, but for small particles of pollution thing, particularly lower than the limited filtering capacity of the particle of 10 μm.Although the particulate matter of less than 10 μm can not cause paroxysmal fault to hydraulic system, easily cause wearing and tearing, cause alluvial, increase surface friction drag; Will cause stuck when action force is not enough to overcome friction, effects on surface produces erosive wear; Particularly the wedge angle of valve is as easy as rolling off a log is lost wedge angle by erosion, causes the performance failure of valve, and for solenoid valve, if spool jam, coil may be burned, and this thing happens can make Safety performance decline.But 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 effectively can control the pollution of hydraulic oil in tank oiling channel oil, reduces mechanical failure Probability.
One aspect of the present invention, provide a kind of filtrating equipment, for filtering the hydraulic oil in tank oiling channel oil, comprise the first filter, also comprise the second filter and position control valve, the filter precision of described second filter is greater than the filter precision of described first filter, and described position control valve is connected with described first filter and described second filter respectively, and be arranged in described tank oiling channel oil, and
Described position control valve is used for controlling described first filter in its first operative state and being communicated with described tank oiling channel oil, and under its second working state, controls described second filter be communicated with described tank oiling channel oil.
Further, described position control valve, under its second working state, is also communicated with described tank oiling channel oil for controlling described first filter.
Further, described position control valve its first working state corresponding and the second working state, have the first filler opening and the second filler opening;
The oil outlet of described first filter is connected with the filler opening of described second filter and the first filler opening of described position control valve respectively;
The oil outlet of described second filter is connected with the second filler opening of described position control valve.
Further, described second filter is also in series with the 3rd filter, and the filter precision of described second filter is greater than the filter precision of described 3rd filter, and
Described position control valve, under its second working state, is also communicated with described tank oiling channel oil for controlling described 3rd filter.
Further, the oil outlet of described 3rd filter is connected with the filler opening of described second filter.
Further, described position control valve its first working state corresponding and the second working state, have the first filler opening and the second filler opening;
The oil outlet of described first filter is connected with the first filler opening of described position control valve;
The oil outlet of described second filter is connected with the second filler opening of described position control valve.
Further, described position control valve its first working state corresponding and the second working state, have the first oil outlet and the second oil outlet;
First oil outlet of described position control valve is connected with the filler opening of shown first filter;
Second oil outlet of described position control valve is connected with the filler opening of shown 3rd filter.
Further, described position control valve is solenoid directional control valve.
Further, described first filter, the second filter, the 3rd filter are all connected with relief valve.
Another aspect of the present invention, additionally provides a kind of engineering machinery, has tank oiling channel oil, and described tank oiling channel oil is provided with filtrating equipment as above.
Filtrating equipment of the present invention, comprise the first filter and the second filter, the filter precision of the second filter is greater than the filter precision of the first filter, achieve two by position control valve and filter oil circuit, position control valve of the present invention is connected with the first filter (coarse-grain filtering device) and the second filter (fine filter) respectively, makes the hydraulic oil in tank oiling channel oil optionally filter when engineering machinery idling (such as pass through fine filter) by fine filter.The present invention considers beneficial effect and the harmful effect of coarse-grain filtering device (i.e. the first filter) and fine filter (i.e. the second filter), the metre filter of different filter precision is adopted respectively when engineering machinery work and idling, can the pollution of effective Control Engineering mechanical-hydraulic oil, reduce mechanical failure Probability.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological 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 only 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.
Fig. 1 is the schematic diagram of the first embodiment of filtrating equipment of the present invention;
Fig. 2 is the schematic diagram of the different connection schemes in tank oiling channel oil embodiment illustrated in fig. 1;
Fig. 3 is the schematic diagram of the second embodiment of filtrating equipment of the present invention;
Fig. 4 is the schematic diagram of the 3rd embodiment of filtrating equipment of the present invention;
Fig. 5 is the schematic diagram of the 4th embodiment of filtrating equipment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only 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.
Be illustrated in figure 2 a kind of filtrating equipment of the present invention, for filtering the hydraulic oil in tank oiling channel oil, comprise the first filter 2, also comprise the second filter 3 and position control valve 4, the filter precision of the second filter 3 is greater than the filter precision of the first filter 2, position control valve 4 is connected with the first filter 2 and the second filter 3 respectively, and be arranged in tank oiling channel oil, and position control valve 4 is communicated with tank oiling channel oil for controlling the first filter 2 in its first operative state, and under its second working state, controls the second filter 3 be communicated with tank oiling channel oil.
Filtrating equipment of the present invention, comprise the first filter 2 and the second filter 3, the filter precision of the second filter 3 is greater than the filter precision of the first filter 2, achieve two by position control valve 4 and filter oil circuit, under the first working state of position control valve 4 (when such as corresponding to engineering machinery work), position control valve 4 controls the first filter 2 and is communicated with tank oiling channel oil, namely tank oiling channel oil adopts the first filter 2 that filter precision is low, under the second working state of position control valve 4 (when such as corresponding to engineering machinery idling), position control valve 4 controls the second filter 3 and is communicated with tank oiling channel oil, namely tank oiling channel oil adopts the second filter 3 that filter precision is high.The present invention considers the pros and cons of coarse-grain filtering device (i.e. the first filter 2) and fine filter (i.e. the second filter 3), the metre filter of different filter precision is adopted respectively the different running state (such as working and idling) of engineering machinery, effectively can control the pollution of hydraulic oil in tank oiling channel oil, reduce mechanical failure Probability.
Position control valve 4 of the present invention is connected with the first filter 2 (coarse-grain filtering device) and the second filter 3 (fine filter) respectively, makes the hydraulic oil in tank oiling channel oil optionally by fine filter when engineering machinery idling (such as pass through fine filter).This position control valve 4 can be preferably solenoid directional control valve, so that control position control valve 4, and then selects different filtration oil circuits.Certainly, position control valve 4 also can select other forms of position control valve, as hydraulicdirectional control valve, electro-hydraulic reversing valve, or even hand-operated direction valve.
Hereafter discuss in detail various embodiments of the present invention for solenoid directional control valve, 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, introduces the present invention in detail below for 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, first oil outlet A of position control valve 4 is connected with the first filter 2, and the second oil outlet B of position control valve 4 is connected with described second filter 3.In shown in Fig. 1, position control valve 4, between position control valve 4 and fuel tank 1, also can as shown in Figure 2, be arranged between filter and fuel tank 1 by filter bits.In addition, the scheme shown in Fig. 1 and Fig. 2 is all connected on oil return circuit, is back to fuel tank 1 after hydraulic oil filtering, can certainly be connected on fuel-displaced oil circuit.
During engineering machinery work, hydraulic oil from P mouth approach axis control valve 4, and flow to the first filter 2 through the A mouth of position control valve 4, and the first filter 2 that now hydraulic circuit only has filter precision lower is used for filtering.During work, oil hydraulic circuit load is comparatively large, hydraulic circuit can not be made to produce very high back pressure, reduce energy loss, raise the efficiency when the first filter 2 filters.During engineering machinery idling, position control valve 4 obtains 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 mouth of position control valve 4, now the load of hydraulic circuit is little, use the metre filter of high filtering precision, the relatively high back pressure of generation can not have an impact to normal work, and effectively can remove the more tiny particle in hydraulic oil.
Embodiment 2:
As shown in Figure 3, with above-described embodiment 1 unlike, second filter 3 of the present invention is also in series with the 3rd filter 5, the filter precision of the second filter 3 is greater than the filter precision of the 3rd filter 5, and position control valve 4 is under its second working state, be also communicated with tank oiling channel oil for controlling the 3rd filter 5.
When engineering machinery idling (now position control valve 4 in the second working state), position control valve 4 obtains electric, the B mouth of hydraulic oil position control valve 4 flows through the 3rd filter 5 and the second filter 3 successively, hydraulic oil in tank oiling channel oil is first through the 3rd filter 5 that filter precision is lower, filter out larger particles, and then filtered by the second filter 3 that filter precision is higher, the effect of double filtration can be played like this, and on the basis ensureing hydraulic circuit filter precision, reduce the frequency changing fine filter cartridge.
In shown in Fig. 3, this filtrating equipment is arranged on oil return circuit, and as the discussion to embodiment 1, this filtrating equipment can be arranged on fuel-displaced oil circuit equally, namely fuel tank 1 is connected with the oil inlet P of position control valve 4, and hydraulic oil first filters and is used further to do work to power unit.
It should be noted that, when the filtrating equipment of the present embodiment is used for oil return circuit, the second filter 3 is arranged between the 3rd filter 5 and fuel tank 1; During for fuel-displaced oil circuit, the 3rd filter 5 is arranged between the second filter 3 and fuel tank 1.That is, the oil outlet that filtrating equipment of the present invention is preferably embodied as the 3rd filter 5 is connected with the filler opening of the second filter 3, with in tank oiling channel oil, the 3rd filter 5 is in the upstream of the second filter 3, and hydraulic oil is preferentially filtered through the 3rd filter 5 that filter precision is low.
Embodiment 3:
As shown in Figure 4, the difference of this embodiment and embodiment 1 exists, and position control valve 4, under its second working state, is also communicated with tank oiling channel oil for controlling the first filter 2.In this embodiment, the oil inlet P 1 of position control valve 4 is connected with the second filter 3 and the first filter 2 successively, and the oil inlet P 2 of position control valve 4 is connected with the first filter 2.
After connecting according to this scheme, when engineering machinery works (the first working state of correspondence direction control valve 4), first filter 2 still keeps the oil circuit conducting between the oil inlet P 1 of position control valve 4, and hydraulic oil the first filter 2 that precision is lower after filtration filters, when engineering machinery idling (the second working state of correspondence direction control valve 4), first filter 2, oil circuit conducting between second filter 3 and position control valve 4, hydraulic oil in tank oiling channel oil is sequentially through the first filter 2, second filter 3, then position control valve 4 is flowed to through position control valve 4 oil inlet P 2, hydraulic oil can first through the first filter 2 that filter precision is lower, filter out larger particles, and then filtered by the second filter 3 that filter precision is higher, reach double filtration effect same as the previously described embodiments equally, and on the basis ensureing hydraulic circuit filter precision, reduce the frequency changing fine filter cartridge.
As a same reason, as shown in Figure 4, this filtrating equipment is arranged on oil return circuit, certainly, according to oil circuit design needs, this filtrating equipment can be arranged on fuel-displaced oil circuit equally, composition graphs 4, namely connects fuel tank 1 above the first filter 2, but not connects fuel tank 1 in the below of position control valve 4.And this direction selector valve 4 also can change with the relative position of combination of filters (first filter 2 and the second filter 3), and direction selector valve 4 is positioned at the filtering effect that the oil circuit upstream of combination of filters or downstream can not affect filtrating equipment.
In the various embodiments described above, when using metre filter, be easy to oil circuit is blocked, oil circuit internal pressure raises, in order to avoid damaging the components and parts in oil circuit during the overpressure of oil circuit, ensure oil circuit safety, as preferably, the first filter 2, second filter 3 in the above embodiment of the present invention, the 3rd filter 5 are all connected with relief valve.
In addition, in the various embodiments described above, the first filter 2 is coarse-grain filtering device, and its filter precision is preferably 10 μm; Second filter 3 is the fine filter that filter precision is higher, and filter precision is less than 10 μm, is preferably 5 μm.The filter core of filter needs frequent replacing, conveniently more renew cartridge, and does not pollute the hydraulic oil in fuel tank 1 when more renew cartridge, and filtrating equipment of the present invention is preferably arranged on the outside of fuel tank 1.
Certainly, because the filter precision of the second filter 3 is high, the frequency of its more renew cartridge is larger, and for the ease of changing, the present invention also only can will cross the second high filter 3 of filter precision and be arranged on the outside of fuel tank 1, and the first filter 2 to be arranged on fuel tank 1 inner.
Embodiment 4:
As shown in Figure 5, the first filter 2 and the second filter 3 are separately positioned on the inside and outside of fuel tank 1, select to select different metre filter under different working staties by position control valve 4.As shown in the figure, this embodiment is arranged on oil return circuit, and for making when mechanical idling, the first filter 2 that first precision is low after filtration filters, and this embodiment also can be arranged on fuel-displaced oil circuit.Certainly, according to the discussion of the various embodiments described above, also the upstream oil circuit (between the second filter 3 and position control valve 4) of the second filter 3 in the present embodiment a coarse-grain filtering device can be set in advance hydraulic oil be filtered.The present embodiment can obtain filtering effect same as the previously described embodiments.
Correspondingly, the present invention also provides a kind of engineering machinery, has tank oiling channel oil, and described tank oiling channel oil is provided with filtrating equipment as above.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a filtrating equipment, for filtering the hydraulic oil in tank oiling channel oil, comprise the first filter (2), it is characterized in that, also comprise the second filter (3) and position control valve (4), the filter precision of described second filter (3) is greater than the filter precision of described first filter (2), described position control valve (4) is connected with described first filter (2) and described second filter (3) respectively, and be arranged in described tank oiling channel oil, and
Described position control valve (4) is communicated with described tank oiling channel oil for controlling described first filter (2) in its first operative state, and under its second working state, controls described second filter (3) be communicated with described tank oiling channel oil.
2. filtrating equipment according to claim 1, is characterized in that, described position control valve (4), under its second working state, is also communicated with described tank oiling channel oil for controlling described first filter (2).
3. filtrating equipment according to claim 2, is characterized in that, described position control valve (4) its first working state corresponding and the second working state, have the first filler opening and the second filler opening;
The oil outlet of described first filter (2) is connected with the filler opening of described second filter (3) and the first filler opening of described position control valve (4) respectively;
The oil outlet of described second filter (3) is connected with the second filler opening of described position control valve (4).
4. filtrating equipment according to claim 1, it is characterized in that, described second filter (3) is also in series with the 3rd filter (5), and the filter precision of described second filter (3) is greater than the filter precision of described 3rd filter (5), and
Described position control valve (4), under its second working state, is also communicated with described tank oiling channel oil for controlling described 3rd filter (5).
5. filtrating equipment according to claim 4, is characterized in that, the oil outlet of described 3rd filter (5) is connected with the filler opening of described second filter (3).
6. filtrating equipment according to claim 5, is characterized in that, described position control valve (4) its first working state corresponding and the second working state, have the first filler opening and the second filler opening;
The oil outlet of described first filter (2) is connected with the first filler opening of described position control valve (4);
The oil outlet of described second filter (3) is connected with the second filler opening of described position control valve (4).
7. filtrating equipment according to claim 5, is characterized in that, described position control valve (4) its first working state corresponding and the second working state, have the first oil outlet and the second oil outlet;
First oil outlet of described position control valve (4) is connected with the filler opening of described first filter (2);
Second oil outlet of described position control valve (4) is connected with the filler opening of described 3rd filter (5).
8. according to the filtrating equipment in claim 1-7 described in any one claim, it is characterized in that, described position control valve (4) is solenoid directional control valve.
9. the filtrating equipment according to any one of claim 4-7, is characterized in that, described first filter (2), the second filter (3), the 3rd filter (5) are all connected with relief valve.
10. an engineering machinery, has tank oiling channel oil, it is characterized in that, described tank oiling channel oil is provided with as the filtrating equipment in claim 1-9 as described in any one.
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 CN102678683A (en) | 2012-09-19 |
| CN102678683B true CN102678683B (en) | 2015-05-13 |
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| 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 |
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| CN (1) | CN102678683B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111692266B (en) * | 2020-06-11 | 2021-12-03 | 中国第一汽车股份有限公司 | Electro-hydraulic proportional valve and continuous damping control shock absorber |
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| 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 |
| CN201547066U (en) * | 2009-10-22 | 2010-08-11 | 安徽星马汽车股份有限公司 | Hydraulic oil bypass-filtering device of concrete pump truck |
| CN201686439U (en) * | 2010-05-28 | 2010-12-29 | 青岛中油通用机械有限公司 | Natural gas filling secondary station trailer jack-up device |
| 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 |
Family Cites Families (2)
| 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 |
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2012
- 2012-04-23 CN CN201210120482.5A patent/CN102678683B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN201547066U (en) * | 2009-10-22 | 2010-08-11 | 安徽星马汽车股份有限公司 | Hydraulic oil bypass-filtering device of concrete pump truck |
| 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 |
| CN201686439U (en) * | 2010-05-28 | 2010-12-29 | 青岛中油通用机械有限公司 | Natural gas filling secondary station trailer jack-up device |
| 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 |
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| CN102678683A (en) | 2012-09-19 |
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Granted publication date: 20150513 |