CN103174704B - Hydraulic oil filtration system and hydraulic shovel - Google Patents
Hydraulic oil filtration system and hydraulic shovel Download PDFInfo
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- CN103174704B CN103174704B CN201310106361.XA CN201310106361A CN103174704B CN 103174704 B CN103174704 B CN 103174704B CN 201310106361 A CN201310106361 A CN 201310106361A CN 103174704 B CN103174704 B CN 103174704B
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Abstract
The invention discloses a kind of hydraulic oil filtration system and hydraulic shovel, the pilot control system that described hydraulic oil filtration system comprises for pilot control hydraulic work device (200) filters oil circuit with the bypass being provided with bypass strainer (3), pioneer pump (1) is provided with in described pilot control system, the inlet port of this pioneer pump (1) is connected with described hydraulic oil container (100), one end that described bypass filters oil circuit connects described hydraulic oil container (100), and the other end is connected on the pilot control oil circuit between described pioneer pump (1) and hydraulic work device (200).The present invention filters oil circuit by the bypass being provided with bypass strainer, and this bypass filtration oil circuit is connected respectively on pilot control oil circuit and hydraulic oil container, thus the hydraulic oil flow velocity on pilot control oil circuit and oil pressure can be utilized to carry out highi degree of accuracy to hydraulic oil and filter efficiently, increase work efficiency, and structure is simple, stable.
Description
Technical field
The invention belongs to hydraulic shovel field, particularly, relate to a kind of hydraulic oil filtration system of hydraulic shovel.
Background technique
In the hydraulic system of excavator, the fault caused by hydraulic oil pollution account for majority.In order to the turbidity test of hydraulic control oil, except taking conventional filtrating equipment, by installing the mode of bypass strainer additional to carry out the higher filtration of precision to hydraulic oil, can fault ratio of hydraulic pressure system be reduced, improving whole aircraft reliability.
The use of current bypass strainer on digging machine has two kinds of methods, one method is the self-powered system of bypass strainer (such as motor), as shown in Figure 1, bypass filtration circuit is formed by motor 2, pump 3, bypass strainer 4 and one-way valve 5, thus independently circulating filtration is carried out to the hydraulic oil in hydraulic oil container, this bypass filtration circuit and excavator hydraulic system loop 1 separate, mutual noninterference.Like this, bypass filtration circuit can carry out independence to the hydraulic oil in hydraulic oil container and the higher filtration of precision.This filter method efficiency is high, interference can not be produced to excavator hydraulic system, but due to needs extra power element, add new noise source, and element is more, installation volume is bigger than normal, cause install difficulty and cost is high, thus be used on super sized type excavator adopts more, is not suitable for ordinary excavator or medium-and-large-sized excavator.
Another kind method is arranged on by bypass strainer on the main oil circuit of system, in parallel with radiator and conventional return filter.As shown in Figure 2, be in the patent of CN202391872U at notification number, disclose hydraulic oil superfinishing microfiltration system in a kind of hydraulic shovel, its principle is: the return opening of system main valve 1 arranges two-way drainback passage in parallel between hydraulic oil container 2, and wherein a road is the back pressure one-way valve 3, radiator 4 and the return filter 5 that set gradually between the return opening of system main valve 1 to hydraulic oil container 2; Another road is the throttle joint 6 and bypass superfinishing micro-filter 7 of connecting successively between the return opening of system main valve 1 to hydraulic oil container 2.This method can reduce costs, noise free, the installation requirement of general medium-and-large-sized excavator can be met, shortcoming is owing to adopting parallel way, and rely on system oil return pressure, as power, hydraulic oil is introduced bypass strainer and filter, this return pressure is less and unstable, and bypass strainer due to filter precision higher, back pressure is large, so very little by the flow of bypass strainer when causing normally using is even zero, thus makes the efficiency of bypass strainer very low.
Summary of the invention
The object of this invention is to provide a kind of hydraulic shovel and hydraulic oil filtration system thereof, effectively to complete the high-precision filtration of system liquid force feed and to improve filter efficiency.
To achieve these goals, the invention provides a kind of hydraulic oil filtration system, the pilot control system that described hydraulic oil filtration system comprises for pilot control hydraulic work device filters oil circuit with the bypass being provided with bypass strainer, pioneer pump is provided with in described pilot control system, the inlet port of this pioneer pump is connected with described hydraulic oil container, one end that described bypass filters oil circuit connects described hydraulic oil container, and the other end connects the oil outlet of described pioneer pump to obtain oil sources from described pioneer pump.
Preferably, described pilot control system comprises the pilot control oil circuit be connected between described pioneer pump and described hydraulic work device, the described the other end that described bypass filters oil circuit connects described pilot control oil circuit, to be connected with described pioneer pump by described pilot control oil circuit.
Preferably, described bypass is filtered in oil circuit and is provided with the series flow control valve of connecting with described bypass strainer, and the filler opening of this series flow control valve connects described pilot control oil circuit, and oil outlet connects described bypass strainer.
Preferably, described bypass strainer is the hydraulic oil filter that filter precision is not more than 1 μm.
Preferably, described bypass is filtered in oil circuit and is provided with the relief valve in parallel with described bypass strainer.
Preferably, described bypass is filtered in oil circuit and is provided with the first bypass one-way valve in parallel with described bypass strainer.
Preferably, the main oil circuit described hydraulic oil filtration system also comprises from the oil outlet of described hydraulic work device to described hydraulic oil container, is provided with return filter in this main oil circuit.
Preferably, the filter precision of described return filter is less than the filter precision of described bypass strainer.
Preferably, described main oil circuit is also provided with the back pressure one-way valve and cooler of connecting with described return filter.
Preferably, described main oil circuit is also provided with the second bypass one-way valve in parallel with described back pressure one-way valve and cooler, and the three bypass one-way valve in parallel with described return filter.
On the basis of technique scheme, present invention also offers a kind of hydraulic shovel, there is in this hydraulic shovel the hydraulic oil filtration system above-mentioned according to the present invention.
Pass through technique scheme, in hydraulic oil filtration system according to the present invention, oil circuit is filtered by the bypass being provided with bypass strainer, and this bypass filtration oil circuit is connected respectively on pilot control oil circuit and hydraulic oil container, thus the hydraulic oil flow velocity on pilot control oil circuit and oil pressure can be utilized to carry out highi degree of accuracy to hydraulic oil and filter efficiently, and System's composition is simple, stable.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the hydraulic principle schematic diagram of a kind of hydraulic oil filtration system according to prior art, the self-powered system of bypass strainer wherein;
Fig. 2 is the hydraulic principle schematic diagram of the another kind of hydraulic oil filtration system according to prior art, and bypass strainer is wherein arranged on main oil circuit; And
Fig. 3 is the hydraulic principle schematic diagram of a kind of hydraulic oil filtration system according to the preferred embodiment of the present invention.
description of reference numerals
1 pioneer pump 2 series flow control valve
3 bypass strainer 4 relief valves
5 back pressure one-way valve 6 coolers
7 return filter 8 second bypass one-way valves
9 the 3rd bypass one-way valves
100 hydraulic oil container 200 hydraulic work devices
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality of use as " upper and lower " normally for direction shown in the drawings or for each parts mutual alignment relationship description word vertically, on vertical or gravitational direction.The noun of locality " left and right " is normally for shown in the drawings horizontal.
As shown in Figure 3, the invention provides a kind of hydraulic oil filtration system, hydraulic oil filtration system comprises the bypass being provided with bypass strainer 3 and filters oil circuit and the pilot control system for pilot control hydraulic work device 200, and this bypass is filtered oil circuit and is connected between the pilot control oil circuit of pilot control system and hydraulic oil container 100.As total inventive concept, in prior art, hydraulic oil filter generality is arranged in system works oil return circuit or independent oil path, hydraulic oil filtration system of the present invention is arranged between pilot control oil circuit and fuel tank by the bypass being provided with bypass strainer 3 is filtered oil circuit, power is provided for bypass strainer 3 to utilize the oil pressure in pilot control oil circuit, thus without the need to additionally increasing power source, guarantee the hydraulic oil flow velocity and the flow that flow through bypass strainer 3, ensure high efficiency filtration.
Particularly, see Fig. 3, for the hydraulic system of excavator in present embodiment, pilot control oil circuit wherein connects and the hydraulic work device 200 of pilot control hydraulic shovel, pioneer pump 1 is provided with in pilot control oil circuit, the inlet port of this pioneer pump 1 is connected with hydraulic oil container 100, to extract hydraulic oil from hydraulic oil container 100.One end that bypass filters oil circuit is then connected on the pilot control oil circuit between the oil outlet of pioneer pump 1 and hydraulic work device 200, particularly preferably directly be connected with the oil outlet of pioneer pump 1, the other end connect hydraulic oil container 100, so just by stable pioneer pump pressure for bypass strainer 3 provides power.
Wherein, bypass is filtered in oil circuit and is provided with the series flow control valve 2 of connecting with bypass strainer 3, and the filler opening of this series flow control valve 2 connects pilot control oil circuit, and oil outlet connects bypass strainer 3.Arranging series flow control valve is on the basis of pressure demand ensureing pilot control oil circuit, by the regulating action of series flow control valve for bypass strainer 3 provides stable pressure and flow, and regulates bypass to filter hydraulic fluid flow rate in oil circuit and flow velocity.Series flow control valve has herein carried out combination brake switch and proporting that is pressure compensated and that be in series by Fixed differential reducing valve and throttle valve.Throttle valve is used for regulating the flow passed through, the impact of Fixed differential reducing valve then auto-compensation load variations, the pressure reduction before and after throttle valve is made to be definite value, eliminate the impact of load variations on flow, thus provide the liquid to be filtered force feed of regime flow and pressure for bypass strainer 3, strong anti-interference performance, reliability is high.Bypass strainer 3 is herein preferably the hydraulic oil filter that filter precision is not more than 1 μm, and such as filter precision is the hydraulic oil filter of spy's essence filtration grade of 0.5 μm, thinks that hydraulic system provides secondary filter.
In addition, bypass is filtered in oil circuit and is provided with the relief valve 4 in parallel with bypass strainer 3, and to ensure that accurate filter is not damaged by internal pressure, when the pressure of the oil outlet of series flow control valve exceedes certain threshold value, high-voltage oil liquid outwards overflows back fuel tank by relief valve 4.Certainly, it will be appreciated by persons skilled in the art that also can to adopt the first bypass one-way valve that can form certain back pressure value herein in parallel with bypass strainer 3, to play the protective action identical with relief valve 4.
Except above-mentioned bypass filters oil circuit, hydraulic oil filtration system of the present invention also comprises the main oil circuit being provided with return filter 7, and this main oil circuit is used for from hydraulic work device 200 to hydraulic oil container 100 oil return.This main oil circuit, for ensureing conventional oil return filter, carries out the filtration of the slightly poor large discharge of precision.The filter precision of return filter 7 wherein should be less than the filter precision of bypass strainer 3, and such as employing filter precision is the hydraulic oil filter of 10 μm.
In order to set up system back pressure on main oil circuit, this main oil circuit is also provided with the back pressure one-way valve 5 of connecting with return filter 7 and cooler 6.Cooler 6 is generally radiator, and it to be arranged in oil return circuit to cool hydraulic oil, prevents oil liquid temperature too high.In addition, main oil circuit is also provided preferably with the second bypass one-way valve 8 in parallel with back pressure one-way valve 5 and cooler 6, and the three bypass one-way valve 9 in parallel with return filter 7.Protecting cooler 6 by arranging the second bypass one-way valve 8, the 3rd bypass one-way valve 9 being set to protect return filter 7, not blocking main oil circuit.
On the basis of above-mentioned hydraulic oil filtration system, present invention also offers a kind of hydraulic shovel, there is in this hydraulic shovel the hydraulic oil filtration system above-mentioned according to the present invention.Thus according to the hydraulic system in hydraulic shovel of the present invention, there is efficient self-cleaning system, can the rate of fault of effective relieve hydraulic system.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (7)
1. hydraulic oil filtration system, it is characterized in that, the pilot control system that described hydraulic oil filtration system comprises for pilot control hydraulic work device (200) filters oil circuit with the bypass being provided with bypass strainer (3), pioneer pump (1) is provided with in described pilot control system, the inlet port of this pioneer pump (1) is connected with described hydraulic oil container (100), one end that described bypass filters oil circuit connects described hydraulic oil container (100), and the other end connects the oil outlet of described pioneer pump (1) to obtain oil sources from described pioneer pump (1);
Wherein, described pilot control system comprises the pilot control oil circuit be connected between described pioneer pump (1) and described hydraulic work device (200), the described the other end that described bypass filters oil circuit connects described pilot control oil circuit, to be connected with described pioneer pump (1) by described pilot control oil circuit, described bypass strainer (3) is not more than the hydraulic oil filter of 1 μm for filter precision;
Main oil circuit described hydraulic oil filtration system also comprises from the oil outlet of described hydraulic work device (200) to described hydraulic oil container (100), be provided with return filter (7) in this main oil circuit, the filter precision of described return filter (7) is less than the filter precision of described bypass strainer (3).
2. hydraulic oil filtration system according to claim 1, it is characterized in that, described bypass is filtered in oil circuit and is provided with the series flow control valve (2) of connecting with described bypass strainer (3), the filler opening of this series flow control valve (2) connects described pilot control oil circuit, and oil outlet connects described bypass strainer (3).
3. hydraulic oil filtration system according to claim 2, is characterized in that, described bypass is filtered in oil circuit and is provided with the relief valve (4) in parallel with described bypass strainer (3).
4. hydraulic oil filtration system according to claim 2, is characterized in that, described bypass is filtered in oil circuit and is provided with the first bypass one-way valve in parallel with described bypass strainer (3).
5. hydraulic oil filtration system according to claim 1, is characterized in that, described main oil circuit is also provided with the back pressure one-way valve (5) and cooler (6) of connecting with described return filter (7).
6. hydraulic oil filtration system according to claim 5, it is characterized in that, described main oil circuit is also provided with the second bypass one-way valve (8) in parallel with described back pressure one-way valve (5) and cooler (6), and the three bypass one-way valve (9) in parallel with described return filter (7).
7. hydraulic shovel, is characterized in that, has according to the hydraulic oil filtration system in the claims 1-6 described in any one in this hydraulic shovel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106361.XA CN103174704B (en) | 2013-03-29 | 2013-03-29 | Hydraulic oil filtration system and hydraulic shovel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310106361.XA CN103174704B (en) | 2013-03-29 | 2013-03-29 | Hydraulic oil filtration system and hydraulic shovel |
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| CN103174704A CN103174704A (en) | 2013-06-26 |
| CN103174704B true CN103174704B (en) | 2016-02-17 |
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| CN201310106361.XA Active CN103174704B (en) | 2013-03-29 | 2013-03-29 | Hydraulic oil filtration system and hydraulic shovel |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438055B (en) * | 2013-09-06 | 2015-09-09 | 四川万冠机电技术有限公司 | Large Hydraulic Equipment on-line cleaning machine |
| CN103883590A (en) * | 2014-04-15 | 2014-06-25 | 山推工程机械股份有限公司 | Bulldozer and hydraulic system thereof |
| CN104695502B (en) * | 2015-03-13 | 2017-04-19 | 辽宁瑞丰专用车制造有限公司 | Hydraulic system of dual-purpose excavation and shoveling machine |
| CN107448441A (en) * | 2017-09-26 | 2017-12-08 | 东北大学 | A kind of hydraulic oil source system for pilot plant |
| CN111980103B (en) * | 2019-05-22 | 2022-06-07 | 山东临工工程机械有限公司 | Excavator hydraulic system and breaking hammer operation mode switching method |
| CN113586559B (en) * | 2021-07-22 | 2024-01-23 | 三一重机有限公司 | Hydraulic oil cooling system and working machine |
| CN114876917A (en) * | 2022-05-27 | 2022-08-09 | 三一重型装备有限公司 | Online oil purifying system of heading machine and heading machine |
| CN117450126B (en) * | 2023-12-20 | 2024-03-15 | 中联重科土方机械有限公司 | Hydraulic system, oil return control method and related equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4011913A1 (en) * | 1990-04-12 | 1991-10-17 | Beyer Rudi Dipl Ing | Hydraulic system with filter - separates out fine particles by channelling part of flow through by=pass line |
| JPH0681815A (en) * | 1992-08-31 | 1994-03-22 | Hitachi Constr Mach Co Ltd | Filter of oil pressure circuit |
| JP2000303504A (en) * | 1999-04-20 | 2000-10-31 | Shin Caterpillar Mitsubishi Ltd | Diagnostic system for hydraulic fluid in hydraulic machine |
| CN102758805A (en) * | 2011-04-20 | 2012-10-31 | J.C.班福德挖掘机有限公司 | Hydraulic circuit and working machine including the same |
| CN202531548U (en) * | 2012-03-12 | 2012-11-14 | 启东市南方润滑液压设备有限公司 | Independent cooling and filtering system of hydraulic station |
| CN202644636U (en) * | 2012-05-21 | 2013-01-02 | 徐州徐工挖掘机械有限公司 | Large-scale excavator oil return system |
| CN202746339U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Hydraulic filtering system as well as hydraulic control system and engineering machinery comprising same |
| CN202768539U (en) * | 2012-07-05 | 2013-03-06 | 徐州徐工基础工程机械有限公司 | By-pass filtering apparatus ensuring cleanliness of heading machine hydraulic oil |
-
2013
- 2013-03-29 CN CN201310106361.XA patent/CN103174704B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4011913A1 (en) * | 1990-04-12 | 1991-10-17 | Beyer Rudi Dipl Ing | Hydraulic system with filter - separates out fine particles by channelling part of flow through by=pass line |
| JPH0681815A (en) * | 1992-08-31 | 1994-03-22 | Hitachi Constr Mach Co Ltd | Filter of oil pressure circuit |
| JP2000303504A (en) * | 1999-04-20 | 2000-10-31 | Shin Caterpillar Mitsubishi Ltd | Diagnostic system for hydraulic fluid in hydraulic machine |
| CN102758805A (en) * | 2011-04-20 | 2012-10-31 | J.C.班福德挖掘机有限公司 | Hydraulic circuit and working machine including the same |
| CN202531548U (en) * | 2012-03-12 | 2012-11-14 | 启东市南方润滑液压设备有限公司 | Independent cooling and filtering system of hydraulic station |
| CN202644636U (en) * | 2012-05-21 | 2013-01-02 | 徐州徐工挖掘机械有限公司 | Large-scale excavator oil return system |
| CN202768539U (en) * | 2012-07-05 | 2013-03-06 | 徐州徐工基础工程机械有限公司 | By-pass filtering apparatus ensuring cleanliness of heading machine hydraulic oil |
| CN202746339U (en) * | 2012-09-11 | 2013-02-20 | 中联重科股份有限公司 | Hydraulic filtering system as well as hydraulic control system and engineering machinery comprising same |
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| CN103174704A (en) | 2013-06-26 |
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