CN201363328Y - Improved hydraulic circuit device of excavator - Google Patents
Improved hydraulic circuit device of excavator Download PDFInfo
- Publication number
- CN201363328Y CN201363328Y CNU2008202327554U CN200820232755U CN201363328Y CN 201363328 Y CN201363328 Y CN 201363328Y CN U2008202327554 U CNU2008202327554 U CN U2008202327554U CN 200820232755 U CN200820232755 U CN 200820232755U CN 201363328 Y CN201363328 Y CN 201363328Y
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- valve
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- communicated
- hydraulic pump
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- 239000000945 filler Substances 0.000 claims description 15
- 230000000875 corresponding effect Effects 0.000 abstract description 12
- 239000003921 oil Substances 0.000 description 45
- 239000010720 hydraulic oil Substances 0.000 description 12
- 239000000446 fuel Substances 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses an improved hydraulic circuit device of an excavator, which comprises a main hydraulic pump, multi-way valves, a shuttle valve and a single hydraulic control changeover valve. The main hydraulic pump is used as a main hydraulic source; each multi-way valve at least comprises two double hydraulic control changeover valves connected in series; the two oil inlets of the shuttle valve are communicated with the two control oil openings of one double hydraulic control changeover valve at the downstream; the control oil opening of the single hydraulic control changeover valve is communicated with the oil outlet of the shuttle valve; the operating oil inlet of the single hydraulic control changeover valve is communicated with the oil outlet of the main hydraulic pump; and the operating oil outlet of the single hydraulic control changeover valve is communicated with the operating oil inlet of the double hydraulic control changeover valve at the downstream of the multi-way valves. With the technical proposal, the bulldozer shovel can still complete the corresponding action if required when the excavator is running, thereby being completely free from the influence of the serial position of the changeover valve in the multi-way valve.
Description
Technical field
The utility model relates to the circuit apparatus for hydraulic technical field, is specifically related to a kind of circuit apparatus for hydraulic that is used for excavator.
Background technique
Domestic excavator market is divided into high, normal, basic three class, and the class height directly depends on excavator complete machine hydraulic system.High-end excavator complete machine hydraulic system complexity, though complete machine control performance and reliability are better, the complete machine cost is higher, and maintenance cost is also higher, and accessory is difficult to be bought, and client layer has narrow limitation; Though low and middle-end excavator cost has competitive advantage, client layer is wider, and the complete machine control technique falls behind, and poor reliability is in high-end excavator.Therefore, urgently need exploitation a kind of simple in structure on the market, efficient height, and the excavator hydraulic system that cost is low, reliability is high, simple to operation.
My company develops a kind of excavator circuit apparatus for hydraulic previously, adopts two oil hydraulic pumps to two groups of external multi-way valve difference supply pressure oil, and two groups of multi-way valve are controlled the action of hydraulic actuator respectively; Whole hydraulic system can be according to working condition, and the hydraulic actuator that the needs interflow is controlled carries out double pump fuel feeding simultaneously.Simultaneously during fuel feeding, double pump is given two groups of multi-way valve fuel feeding respectively, the pilot operated directional control valve of the same hydraulic actuator of control opens or closes simultaneously by pilot valve in two groups of multi-way valve, and then by the outer main interflow pipeline of valve body the hydraulic pressure of double pump can be transported to hydraulic actuator.This structure optimization whole hydraulic system power distribution, improved the working efficiency of excavator greatly, simultaneously, this circuit apparatus for hydraulic also can adopt the production domesticization hydraulic element, and cost of production is reduced greatly.
But, in use, because multi-way valve is made up of several selector valves, these selector valves are connected in series mutually, and for the preferential straight line moving function that guarantees, the selector valve that often will control running motor places the upstream position of multi-way valve, like this, excavator is when walking, will be from the hydraulic oil of oil hydraulic pump by priority allocation to running motor, and the selector valve of controlling other executive component action will not have hydraulic oil to pass through, in other words, excavator is when walking, and other executive component can't be implemented operation.This problem shows more obviously when the soil-shifting operation.How in the excavator walking, can make dozer finish necessary operation again, become the technical problem that those skilled in the art press for solution.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of excavator circuit apparatus for hydraulic, and to solve in multi-way valve, the selector valve that is serially connected with the selector valve of upstream position and is serially connected with downstream position is the technical problem of fuel feeding simultaneously.
For solving the problems of the technologies described above, the technical solution of the utility model is: improved excavator circuit apparatus for hydraulic comprises the Main Hydraulic Pump that is used to form main hydraulic power; Multi-way valve comprises the double hydraulic control selector valve of two serial connections at least in each multi-way valve; Shuttle valve, two filler openings of described shuttle valve respectively with multi-way valve in be positioned at a double hydraulic control selector valve of downstream position two control ports be communicated with; Single pilot operated directional control valve, the control port of described single pilot operated directional control valve is communicated with the oil outlet of shuttle valve, the work filler opening of described single pilot operated directional control valve is communicated with the oil outlet of Main Hydraulic Pump, and the work filler opening that is positioned at a double hydraulic control selector valve of downstream position in the work oil outlet of described single pilot operated directional control valve and the described multi-way valve is communicated with.
After having adopted technique scheme, the beneficial effects of the utility model are: owing to be provided with shuttle valve and single pilot operated directional control valve in oil hydraulic circuit, therefore, when guide's hydraulic oil is carried in the control port of a double hydraulic control selector valve that is positioned at downstream position by pilot valve in multi-way valve, guide's hydraulic oil also is transported to shuttle valve simultaneously, at this moment, the spool that will be driven single pilot operated directional control valve by the hydraulic oil of shuttle valve output moves to working position, the work filler opening that is single pilot operated directional control valve is communicated with the work oil outlet, thereby, the part hydraulic oil of Main Hydraulic Pump is imported into the work filler opening of a double hydraulic control selector valve that is positioned at downstream position in the multi-way valve, and then enter the active chamber of corresponding executive component, finish corresponding work.A double hydraulic control selector valve that is in upstream position in multi-way valve is used to control running motor, when a double hydraulic control selector valve that is in downstream position is used to control the dozer oil cylinder, just can the limit walking, and the limit makes dozer finish the purpose of corresponding action.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
Accompanying drawing is the utility model embodiment's a hydraulic schematic diagram,
Among the figure, 101. first oil hydraulic pumps, 102. second oil hydraulic pumps, 201. left lateral are walked motor, 202. dozer oil cylinders, 301. left lateral are walked the motor pilot operated directional control valve, 302. dozer oil cylinder pilot operated directional control valves, 401. shuttle valves, 402. single pilot operated directional control valves.
Embodiment
The utility model has disclosed a kind of circuit apparatus for hydraulic that is used for excavator, it comprises oil hydraulic pump, a plurality of hydraulic actuators, a plurality of hydraulic oil of respectively described oil hydraulic pump being discharged flow to the selector valve of corresponding hydraulic actuator, and make described selector valve carry out the pilot valve of handover operation.
As shown in drawings, described oil hydraulic pump comprises first oil hydraulic pump 101 and second oil hydraulic pump 102 that is used to form main hydraulic power, and the 3rd oil hydraulic pump (not shown) that is used to form guide's hydraulic power.Described first oil hydraulic pump 101 and second oil hydraulic pump 102 are Main Hydraulic Pumps, adopt the duplex pump structure.
Described a plurality of hydraulic actuator comprises that left lateral walks motor 201, and described left lateral is walked the walking that motor 201 is used to control the excavator left track; Rotary motor, described rotary motor is used to control the rotation of traverse platform; Bucket arm cylinder, described bucket arm cylinder are used to control the excavation and the discharging of dipper; Boom cylinder, boom cylinder are used to control the liter of swing arm and fall; Dozer oil cylinder 202, dozer oil cylinder 202 is used to control the action of dozer; Right lateral is walked motor, and described right lateral is walked the walking that motor is used to control excavator right side crawler belt; Bucket cylinder, bucket cylinder are used to control the excavation and the discharging of scraper bowl; Hydraulic hammer etc.
Described selector valve is the double hydraulic control selector valve, be preferably three six logical double hydraulic control selector valves, each double hydraulic control selector valve all has two work oil outlets and two control ports, and the work oil outlet is used to connect hydraulic actuator, and control port is used to connect pilot valve.These double hydraulic control selector valves are concatenated into two groups respectively, one group is first multi-way valve, another group is second multi-way valve, described first multi-way valve is connected between first oil hydraulic pump 101 and the corresponding hydraulic actuator, described second multi-way valve is connected between second oil hydraulic pump 102 and the corresponding hydraulic actuator, shown in the accompanying drawing is the part-structure of first multi-way valve, wherein, be used to control left lateral and walk the left lateral of motor 201 and walk the upstream position that motor pilot operated directional control valve 301 is positioned at first multi-way valve, the dozer oil cylinder pilot operated directional control valve 302 that is used to control dozer oil cylinder 202 is positioned at the downstream position of first multi-way valve.The structure of second multi-way valve and first multi-way valve are basic identical, do not give unnecessary details at this.
Why adopt two Main Hydraulic Pumps and two multi-way valve, be for the ease of a plurality of hydraulic actuators are carried out flow-dividing control, and when being necessary corresponding executive component carried out the control of external interflow, for example bucket arm cylinder and boom cylinder.
Described pilot valve is manual pilot valve, and described these manual pilot valves are connected between described the 3rd oil hydraulic pump and the corresponding double hydraulic control selector valve.
As shown in drawings, the utility model also is provided with shuttle valve 401 and single pilot operated directional control valve 402.Shuttle valve is actually the combination of two one-way valves, and its two filler openings are communicated with two control ports of dozer oil cylinder pilot operated directional control valve 302 respectively; The control port of single pilot operated directional control valve 402 is communicated with the oil outlet of shuttle valve, two work filler openings of single pilot operated directional control valve 402 are communicated with the oil outlet of first oil hydraulic pump 101 and second oil hydraulic pump 102 respectively, and the work oil outlet of single pilot operated directional control valve 402 is communicated with the work filler opening of dozer oil cylinder pilot operated directional control valve 302.
Working principle is as follows:
When passing through a corresponding pilot valve when guide's hydraulic oil is carried in the control port of dozer oil cylinder pilot operated directional control valve 302, guide's hydraulic oil also is transported to shuttle valve 401 simultaneously, at this moment, the spool that will be driven single pilot operated directional control valve 402 by the hydraulic oil of shuttle valve 401 output moves to working position, the work filler opening that is single pilot operated directional control valve 402 is communicated with the work oil outlet, thereby, the part hydraulic oil of first oil hydraulic pump 101 and second oil hydraulic pump 102 is imported into the work filler opening of dozer oil cylinder pilot operated directional control valve 302, and then enter the active chamber of dozer oil cylinder 202, finish corresponding work.
Although the selector valve that is used to control the dozer oil cylinder has been arranged at the downstream position of multi-way valve, but pass through said structure, even under the situation of excavator walking, if desired, the selector valve that is used to control the dozer oil cylinder still can obtain hydraulic oil, make dozer finish corresponding action, be not subjected to selector valve in multi-way valve, to be connected in series the influence of position fully.
The utility model is not limited to above-mentioned mode of execution, and for example, other is in the double hydraulic control selector valve of downstream position also shuttle valve and single pilot operated directional control valve can be used for controlling multi-way valve.
Claims (2)
1. improved excavator circuit apparatus for hydraulic comprises
Be used to form the Main Hydraulic Pump of main hydraulic power;
Multi-way valve comprises the double hydraulic control selector valve of two serial connections at least in each multi-way valve;
It is characterized in that: described circuit apparatus for hydraulic also comprises
Shuttle valve, two filler openings of described shuttle valve respectively with multi-way valve in be positioned at a double hydraulic control selector valve of downstream position two control ports be communicated with;
Single pilot operated directional control valve, the control port of described single pilot operated directional control valve is communicated with the oil outlet of shuttle valve, the work filler opening of described single pilot operated directional control valve is communicated with the oil outlet of Main Hydraulic Pump, and the work filler opening that is positioned at a double hydraulic control selector valve of downstream position in the work oil outlet of described single pilot operated directional control valve and the described multi-way valve is communicated with.
2. improved excavator circuit apparatus for hydraulic as claimed in claim 1, it is characterized in that: described Main Hydraulic Pump comprises first oil hydraulic pump and second oil hydraulic pump, the work filler opening of described single pilot operated directional control valve has two, and two work filler openings of described single pilot operated directional control valve are communicated with the oil outlet of first oil hydraulic pump and second oil hydraulic pump respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202327554U CN201363328Y (en) | 2008-12-22 | 2008-12-22 | Improved hydraulic circuit device of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202327554U CN201363328Y (en) | 2008-12-22 | 2008-12-22 | Improved hydraulic circuit device of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201363328Y true CN201363328Y (en) | 2009-12-16 |
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ID=41473991
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202327554U Expired - Fee Related CN201363328Y (en) | 2008-12-22 | 2008-12-22 | Improved hydraulic circuit device of excavator |
Country Status (1)
| Country | Link |
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| CN (1) | CN201363328Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409715A (en) * | 2010-09-21 | 2012-04-11 | 株式会社久保田 | Hydraulic system for working machine |
| CN103470556A (en) * | 2013-08-30 | 2013-12-25 | 湖南三一路面机械有限公司 | Multi-way valve converging hydraulic system and land leveler |
| CN103806496A (en) * | 2014-01-22 | 2014-05-21 | 柳州柳工液压件有限公司 | Excavator hydraulic control system |
| CN105422533A (en) * | 2015-11-25 | 2016-03-23 | 贵州詹阳动力重工有限公司 | Multi-functional hydraulic output platform of excavator |
| CN106122139A (en) * | 2016-08-25 | 2016-11-16 | 柳州市菱丰科技有限公司 | A kind of hydraulic system being applied to pruner |
| CN107654427A (en) * | 2017-09-07 | 2018-02-02 | 浙江志高机械股份有限公司 | More dynamic Control borer systems |
-
2008
- 2008-12-22 CN CNU2008202327554U patent/CN201363328Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409715A (en) * | 2010-09-21 | 2012-04-11 | 株式会社久保田 | Hydraulic system for working machine |
| CN102409715B (en) * | 2010-09-21 | 2015-03-11 | 株式会社久保田 | Hydraulic system for working machine |
| CN103470556A (en) * | 2013-08-30 | 2013-12-25 | 湖南三一路面机械有限公司 | Multi-way valve converging hydraulic system and land leveler |
| CN103470556B (en) * | 2013-08-30 | 2016-07-27 | 湖南三一路面机械有限公司 | A kind of banked direction control valves combining hydraulic system and land leveller |
| CN103806496A (en) * | 2014-01-22 | 2014-05-21 | 柳州柳工液压件有限公司 | Excavator hydraulic control system |
| CN103806496B (en) * | 2014-01-22 | 2016-07-06 | 柳州柳工液压件有限公司 | excavator hydraulic control system |
| CN105422533A (en) * | 2015-11-25 | 2016-03-23 | 贵州詹阳动力重工有限公司 | Multi-functional hydraulic output platform of excavator |
| CN106122139A (en) * | 2016-08-25 | 2016-11-16 | 柳州市菱丰科技有限公司 | A kind of hydraulic system being applied to pruner |
| CN107654427A (en) * | 2017-09-07 | 2018-02-02 | 浙江志高机械股份有限公司 | More dynamic Control borer systems |
| CN107654427B (en) * | 2017-09-07 | 2024-05-03 | 浙江志高机械股份有限公司 | Multi-power control drilling machine system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091216 Termination date: 20101222 |