CN103276762B - A kind of structure and hydraulic crawler excavator improving bucket rod suction - Google Patents
A kind of structure and hydraulic crawler excavator improving bucket rod suction Download PDFInfo
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- CN103276762B CN103276762B CN201310205836.0A CN201310205836A CN103276762B CN 103276762 B CN103276762 B CN 103276762B CN 201310205836 A CN201310205836 A CN 201310205836A CN 103276762 B CN103276762 B CN 103276762B
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Abstract
The invention discloses a kind of structure and the hydraulic crawler excavator that improve bucket rod suction, structure comprises the empty oil circuit of anti-suction and the first one way valve; First one way valve is arranged on the empty oil circuit of anti-suction; Load sensitive pump is used for providing anti-suction Null oil-pressure to equipment, and anti-suction Null oil-pressure enters into equipment from load sensitive pump through the first one way valve.The invention has the beneficial effects as follows: avoid the hydraulic system of hydraulic crawler excavator due to the emptying phenomenon that speed promotes or equipment carries out composition operation and causes; Leading controller continuous firing can be made, not by the impact of anti-suction Null oil-pressure; Structure is simple, easy and simple to handle.
Description
Technical field
The present invention relates to a kind of hydraulic system of hydraulic crawler excavator, particularly relate to a kind of structure and the hydraulic crawler excavator that improve bucket rod suction.
Background technology
Hydraulic crawler excavator is a kind of based on hydraulic transmission technology, be applied to the multi-functional mechanicals such as traffic engineering, mine engineering, civil engineering, but also expose some attached problems while the speed lifting along with hydraulic crawler excavator, and the emptying phenomenon produced when dipper or swing arm decline is the key factor affecting hydraulic crawler excavator operability, be also the hidden danger that hydraulic crawler excavator brings when speed promotes.And nowadays adopt regenerates spool to improve speed and operability more, to improve the emptying phenomenon of hydraulic crawler excavator; But under low-grade location, when especially doing dipper composite move, hydraulic crawler excavator still there will be emptying phenomenon.
Summary of the invention
In view of this, the present invention proposes a kind of structure and the hydraulic crawler excavator that improve bucket rod suction, produces the problem of emptying phenomenon with the hydraulic system solving hydraulic crawler excavator.
For achieving the above object, technical scheme of the present invention is achieved in that
Improve a structure for bucket rod suction, be applied in the hydraulic system of excavator, hydraulic system comprises load sensitive pump, load-sensitive valve, equipment and leading controller; Load sensitive pump is provided for the control oil pressure of control load sensitive valve to leading controller, load sensitive pump is provided for load-sensitive valve the operating oil pressure controlling equipment, leading controller carries out control operation by the oil pressure responsive to load valve received, and carries out different action to control equipment by load-sensitive valve; It is characterized in that, the structure improving bucket rod suction comprises the empty oil circuit of anti-suction and the first one way valve;
First one way valve is arranged on the empty oil circuit of anti-suction; Load sensitive pump is used for providing anti-suction Null oil-pressure to equipment, and anti-suction Null oil-pressure enters into equipment from load sensitive pump through the first one way valve.
The above-mentioned structure improving bucket rod suction, wherein, also comprises reducing valve, and the oil pressure that reducing valve is used for responsive to load pump and provides reduces pressure, and anti-suction Null oil-pressure enters into the first one way valve after reducing valve reduces pressure.
The above-mentioned structure improving bucket rod suction, wherein, also comprise accumulator and the second one way valve, accumulator and the second one way valve are all arranged on the oil circuit between load sensitive pump and leading controller; Control oil pressure to enter into leading controller through the order of reducing valve, the second one way valve, accumulator; Accumulator is used for providing control oil pressure to leading controller.
The above-mentioned structure improving bucket rod suction, wherein, equipment is oil cylinder.
The above-mentioned structure improving bucket rod suction, wherein, leading controller is hydraulic control lever.
In addition, a kind of hydraulic crawler excavator, wherein, includes the above-mentioned structure improving bucket rod suction.
The invention has the beneficial effects as follows:
1, load sensitive pump provides anti-suction Null oil-pressure by the empty oil circuit of anti-suction to equipment, avoids the hydraulic system of hydraulic crawler excavator due to the emptying phenomenon that speed promotes or equipment carries out composition operation and causes.
2, by utilizing accumulator when load sensitive pump provides anti-suction Null oil-pressure to equipment, continuing to provide control oil pressure to leading controller, leading controller can be worked on.
3, structure is simple, easy and simple to handle.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation that the present invention improves the constructive embodiment of bucket rod suction.
Description of reference numerals
1, load sensitive pump
2, load-sensitive valve
3, leading controller
4, equipment
5, the empty oil circuit of anti-suction
6, the first one way valve
7, accumulator
8, the second one way valve
9, reducing valve
10, large chamber
11, loculus
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical 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.
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.
Basic thought of the present invention is: design a kind of structure improving bucket rod suction, by arranging the empty oil circuit of anti-suction in the hydraulic system of hydraulic crawler excavator, to play the effect preventing hydraulic system from occurring emptying phenomenon.
Below in conjunction with accompanying drawing, each preferred embodiment of the present invention is described further:
Improve a structure for bucket rod suction as shown in Figure 1, be applied in the hydraulic system of excavator, hydraulic system comprises load sensitive pump 1, load-sensitive valve 2, equipment 4 and leading controller 3; Load sensitive pump 1 is provided for the control oil pressure of control load sensitive valve 2 to leading controller 3, load sensitive pump 1 is provided for load-sensitive valve 2 operating oil pressure controlling equipment 4, leading controller 3 carries out control operation by the oil pressure responsive to load valve 2 received, and carries out different action to be controlled equipment 4 by load-sensitive valve 2; It is characterized in that, the structure improving bucket rod suction comprises the empty oil circuit 5 of anti-suction and the first one way valve 6;
First one way valve 6 is arranged on the empty oil circuit 5 of anti-suction; Load sensitive pump 1 is for providing anti-suction Null oil-pressure to equipment 4, and anti-suction Null oil-pressure enters into equipment 4 from load sensitive pump 1 through the first one way valve 6.
The operating principle of technique scheme is: when emptying phenomenon does not appear in equipment 4, the anti-suction Null oil-pressure that oil pressure in equipment 4 provides higher than load sensitive pump 1, and then anti-suction Null oil-pressure does not enter in equipment 4 by the first one way valve 6, when emptying phenomenon appears in equipment 4, load sensitive pump 1 will provide anti-suction Null oil-pressure via the first one way valve 6 to equipment 4 by the empty oil circuit of anti-suction 5.
On the basis of technique scheme, further, the structure improving bucket rod suction also comprises reducing valve 9, and the oil pressure that reducing valve 9 provides for responsive to load pump 1 reduces pressure, and anti-suction Null oil-pressure enters into the first one way valve 6 after reducing valve 9 reduces pressure; The structure improving bucket rod suction also comprises accumulator 7 and the second one way valve 8, and accumulator 7 and the second one way valve 8 are all arranged on the oil circuit between load sensitive pump 1 and leading controller 3; Control oil pressure to enter into leading controller 3 through the order of reducing valve 9, second one way valve 8, accumulator 7; Accumulator 7 is for providing control oil pressure to leading controller 3; Wherein, the oil pressure provided by reducing valve 9 responsive to load pump 1 is carried out decompression and makes anti-suction Null oil-pressure and control oil pressure to damage leading controller 3 because pressure is excessive.
Concrete, when emptying phenomenon does not appear in equipment 4, anti-suction Null oil-pressure is after reducing valve 9 reduces pressure, and the pressure of anti-suction Null oil-pressure is less than the oil pressure in the large chamber 10 of equipment 4, first one way valve 6 is closure state, and anti-suction Null oil-pressure does not enter into the large chamber 10 of equipment 4; Control oil pressure after the decompression of reducing valve 9, enter into leading controller 3 through the second one way valve 8 and accumulator 7, control oil pressure simultaneously and also provide oil pressure to accumulator 7, the control oil pressure that the oil pressure of leading controller 3 is provided by load sensitive pump 1 provides;
Concrete, when there is emptying phenomenon in equipment 4, owing to there is emptying phenomenon in equipment 4, oil pressure in the oil sucting cavity of equipment 4 is almost equal to zero, anti-suction Null oil-pressure enters in the large chamber 10 of equipment 4 through the first one way valve 6, meanwhile, load sensitive pump 1 does not provide control oil pressure to leading controller 3; Oil pressure in accumulator 7 controls oil pressure to ensure the normal work of leading controller 3 by providing to leading controller 3.
On the basis of technique scheme, further, equipment 4 is oil cylinder, and equipment 4 comprises large chamber 10 and loculus 11, and anti-suction Null oil-pressure enters in the large chamber 10 of equipment 4; Leading controller 3 is hydraulic control lever; Wherein, because emptying phenomenon the most easily appears in the large chamber 10 of equipment 4, therefore, preferably, anti-suction Null oil-pressure enters in the large chamber 10 of equipment 4, and meanwhile, anti-suction Null oil-pressure also can be applied to other according to technique scheme and occur in the hydraulic unit of emptying phenomenon.
As can be seen from the various embodiments described above, advantage of the present invention is:
1, load sensitive pump provides anti-suction Null oil-pressure by the empty oil circuit of anti-suction to equipment, avoids the hydraulic system of hydraulic crawler excavator due to the emptying phenomenon that speed promotes or equipment carries out composition operation and causes.
2, by utilizing accumulator when load sensitive pump provides anti-suction Null oil-pressure to equipment, continuing to provide control oil pressure to leading controller, leading controller can be worked on.
3, structure is simple, easy and simple to handle.
The embodiment of the present invention additionally provides a kind of hydraulic crawler excavator, this hydraulic crawler excavator be provided with above-mentioned any one improve the structure of bucket rod suction, because any one structure improving bucket rod suction above-mentioned has above-mentioned technique effect, therefore, the hydraulic crawler excavator being provided with the structure of this improvement bucket rod suction also should possess corresponding technique effect, its specific implementation process is similar to the above embodiments, does not hereby repeat.
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 (5)
1. one kind is improved the structure of bucket rod suction, be applied in the hydraulic system of excavator, described hydraulic system comprises load sensitive pump (1), load-sensitive valve (2), equipment (4) and leading controller (3); Described load sensitive pump (1) is provided for described leading controller (3) the control oil pressure controlling described load-sensitive valve (2), described load sensitive pump (1) is provided for described load-sensitive valve (2) operating oil pressure controlling described equipment (4), described leading controller (3) carries out control operation by the oil pressure received to described load-sensitive valve (2), carries out different action to control described equipment (4) by described load-sensitive valve (2); It is characterized in that, the described structure improving bucket rod suction comprises the empty oil circuit of anti-suction (5) and the first one way valve (6);
Described first one way valve (6) is arranged in the empty oil circuit of described anti-suction (5); Described load sensitive pump (1) is for providing anti-suction Null oil-pressure to described equipment (4), and described anti-suction Null oil-pressure enters into described equipment (4) from described load sensitive pump (1) through described first one way valve (6);
Also comprise reducing valve (9), described reducing valve (9) is for reducing pressure to the oil pressure that equipment and leading controller provide to described load sensitive pump (1), and described anti-suction Null oil-pressure enters into described first one way valve (6) after described reducing valve (9) reduces pressure.
2. improve the structure of bucket rod suction as claimed in claim 1, it is characterized in that, also comprise accumulator (7) and the second one way valve (8), described accumulator (7) and described second one way valve (8) are all arranged on the oil circuit between described load sensitive pump (1) and described leading controller (3); Described control oil pressure is to enter into described leading controller (3) through the order of described reducing valve (9), described second one way valve (8), described accumulator (7); Described accumulator (7) is for providing described control oil pressure to described leading controller (3).
3. as improved the structure of bucket rod suction in claim 1 to 2 as described in any one, it is characterized in that, described equipment (4) is oil cylinder.
4. improve the structure of bucket rod suction as claimed in claim 1, it is characterized in that, described leading controller (3) is hydraulic control lever.
5. a hydraulic crawler excavator, is characterized in that, includes the structure of the improvement bucket rod suction described in the claims 1-4 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310205836.0A CN103276762B (en) | 2013-05-28 | 2013-05-28 | A kind of structure and hydraulic crawler excavator improving bucket rod suction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310205836.0A CN103276762B (en) | 2013-05-28 | 2013-05-28 | A kind of structure and hydraulic crawler excavator improving bucket rod suction |
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| CN103276762A CN103276762A (en) | 2013-09-04 |
| CN103276762B true CN103276762B (en) | 2016-03-30 |
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| CN201310205836.0A Active CN103276762B (en) | 2013-05-28 | 2013-05-28 | A kind of structure and hydraulic crawler excavator improving bucket rod suction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110608207B (en) * | 2019-09-19 | 2021-05-14 | 柳州柳工挖掘机有限公司 | Emergency unloading device for hydraulic actuating element of engineering machinery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103931A (en) * | 1985-05-03 | 1986-10-29 | 维克斯公司 | Actuating unit |
| EP1126088A2 (en) * | 2000-02-18 | 2001-08-22 | Deere & Company | Hydraulic system for the dampening of inertia load |
| CN1427186A (en) * | 2001-12-20 | 2003-07-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Device for controlling flow in heavy construction equipment |
| CN101858368A (en) * | 2010-05-13 | 2010-10-13 | 山东泰丰液压设备有限公司 | Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation |
| CN101956405A (en) * | 2010-07-15 | 2011-01-26 | 吉林大学 | Gravitational potential energy recovery device during descending of engineering machinery movable arm |
| CN102108982A (en) * | 2009-12-29 | 2011-06-29 | 沃尔沃建造设备控股（瑞典）有限公司 | Negative control type hydraulic system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4151597B2 (en) * | 2004-03-31 | 2008-09-17 | コベルコ建機株式会社 | Hydraulic control circuit and construction machinery |
-
2013
- 2013-05-28 CN CN201310205836.0A patent/CN103276762B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85103931A (en) * | 1985-05-03 | 1986-10-29 | 维克斯公司 | Actuating unit |
| EP1126088A2 (en) * | 2000-02-18 | 2001-08-22 | Deere & Company | Hydraulic system for the dampening of inertia load |
| CN1427186A (en) * | 2001-12-20 | 2003-07-02 | 沃尔沃建造设备控股（瑞典）有限公司 | Device for controlling flow in heavy construction equipment |
| CN102108982A (en) * | 2009-12-29 | 2011-06-29 | 沃尔沃建造设备控股（瑞典）有限公司 | Negative control type hydraulic system |
| CN101858368A (en) * | 2010-05-13 | 2010-10-13 | 山东泰丰液压设备有限公司 | Multiple directional control valve system for return oil throttle control with load sensitive pressure compensation |
| CN101956405A (en) * | 2010-07-15 | 2011-01-26 | 吉林大学 | Gravitational potential energy recovery device during descending of engineering machinery movable arm |
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Effective date of registration: 20160229 Address after: 215500 southeast Road, Changshu Southeast Economic Development Zone, Suzhou, Jiangsu, Changshou City Applicant after: Changshu Huawei Track Co.,Ltd. Address before: 201306 Pudong New Area Port Industrial Park, Shanghai, No. two port road, block A, 318 Applicant before: Shanghai Sany Heavy Machinery Co., Ltd. |
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Effective date of registration: 20171123 Address after: 215500 southeast avenue of Changshu Southeast Economic Development Zone, Suzhou, Jiangsu Patentee after: Suote Transmission Equipment Co., Ltd. Address before: 215500 southeast Road, Changshu Southeast Economic Development Zone, Suzhou, Jiangsu, Changshou City Patentee before: Changshu Huawei Track Co.,Ltd. |
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