CN203808126U - Nitrogen suspension hydraulic system of loader - Google Patents
Nitrogen suspension hydraulic system of loader Download PDFInfo
- Publication number
- CN203808126U CN203808126U CN201420205868.0U CN201420205868U CN203808126U CN 203808126 U CN203808126 U CN 203808126U CN 201420205868 U CN201420205868 U CN 201420205868U CN 203808126 U CN203808126 U CN 203808126U
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- Prior art keywords
- mouth
- loader
- over valves
- valve
- operated directional
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000000725 suspension Substances 0.000 title claims abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 11
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 230000005284 excitation Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 241000283153 Cetacea Species 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Landscapes
- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a nitrogen suspension hydraulic system of a loader and belongs to the technical field of loaders. The nitrogen suspension hydraulic system of the loader comprises a main distribution valve, a hydraulic oil tank, a left moving arm oil cylinder, a right moving arm oil cylinder, a four-position four-way hydraulically-operated directional control valve, a two-position three-way electromagnetic directional control valve and an energy accumulator. When the running speed of the loader reaches a set value, the energy accumulator is communicated with large cavities of the moving arm oil cylinders, so that the rigidity of the moving arm oil cylinders is reduced, and the mechanical model of vibration of the loader is transformed into a two-freedom-degree supporting base displacement excitation vibration system from a single-freedom-degree supporting base displacement excitation vibration system. The nitrogen suspension hydraulic system of the loader solves the problems caused by the situation that when the loader runs at a high speed without loads and transfers materials, the whole loader will vibrate front and back with a front axle as the center, the steering effect and the braking effect are enhanced, the material transfer efficiency is improved, the service life of sliding bearings of the moving arm oil cylinders is prolonged, and the safety performance of the whole loader is improved.
Description
Technical field
The utility model relates to loader technical field, specifically a kind of loader nitrogen suspension hydraulic system.
Background technology
Current loader is in deadhead operation speed during very high or transhipment material operation, and complete machine can porpoise centered by propons, has caused so following problem: reduced the comfortableness of driving; Reduced the efficiency of material transfer; During material transfer, may spill material; The aggravation of boom cylinder sliding bearing abrasion; The tire that may cause loader is kiss the earth always not, has reduced the effect that turns to and brake.
Summary of the invention
For solving loader in deadhead operation speed during very high or transhipment material operation, complete machine can porpoise centered by propons problem, the utility model increases a kind of loader nitrogen suspension hydraulic system in former loader hydraulic system, this system architecture is simple, cost is low, and has the comfortable effect of similar automobile air suspension system.
The technical scheme that the utility model is taked is: a kind of loader nitrogen suspension hydraulic system, comprises main distributing valve, hydraulic oil container, left boom cylinder and right boom cylinder; Also comprise four four-way hydraulicchange-over valves, two-bit triplet solenoid operated directional valve and accumulator;
The A mouth of described main distributing valve connects the A mouth of four four-way hydraulicchange-over valves, the large chamber of while left boom cylinder in parallel and right boom cylinder, the B mouth of main distributing valve connects the B mouth of four four-way hydraulicchange-over valves, simultaneously the loculus of left boom cylinder in parallel and right boom cylinder;
The T mouth of four described four-way hydraulicchange-over valves connects hydraulic oil container, and the P mouth of four four-way hydraulicchange-over valves connects the right control chamber of accumulator and four four-way hydraulicchange-over valves; First of four four-way hydraulicchange-over valves is that T mouth is communicated with B mouth, P mouth is communicated with A mouth, and its second is that T mouth is closed with B mouth, P mouth is communicated with A mouth, and its 3rd is that whole interfaces are closed, its 4th be that T mouth is communicated with P mouth, B mouth and A mouth close;
The B mouth of described two-bit triplet solenoid operated directional valve and C mouth are connected respectively T mouth and the P mouth of four four-way hydraulicchange-over valves, and the A mouth of two-bit triplet solenoid operated directional valve connects the left control chamber of four four-way hydraulicchange-over valves; The upper A of the being mouth of two-bit triplet solenoid operated directional valve is communicated with B mouth, C mouth is closed, and its next A of being mouth is communicated with C mouth, B mouth is closed; When loader travel speed reaches setting value, the electromagnet of two-bit triplet solenoid operated directional valve obtains electric, and two-bit triplet solenoid operated directional valve is changed to the next;
The left control chamber of the A of described two-bit triplet solenoid operated directional valve mouth and described four four-way hydraulicchange-over valves be connected oil circuit in be provided with choke valve;
Between the T of described four four-way hydraulicchange-over valves mouth and P mouth, be parallel with respectively overflow valve and 2/2-way reversal valve.
Advantage of the present utility model: adopt the nitrogen suspension hydraulic system of similar automobile air suspension system, improve the comfortableness of driving; During material transfer, spill material still less, thereby improve the efficiency of material transfer; Improve the life-span of boom cylinder sliding bearing; The more important thing is the tire kiss the earth always when rugged ground travels that makes loader, strengthen the effect that turns to and brake, improve the safety of complete machine.
Accompanying drawing explanation
Fig. 1 is the utility model structure principle chart.
In figure: 1, main distributing valve; 2, four four-way hydraulicchange-over valves; 3, hydraulic oil container; 4, choke valve; 5, two-bit triplet solenoid operated directional valve; 6, accumulator; 7, overflow valve; 8,2/2-way reversal valve; 9, left boom cylinder; 10, right boom cylinder.
The specific embodiment
Be below a specific embodiment of the present utility model, now by reference to the accompanying drawings the utility model be described further.
As shown in Figure 1, a kind of loader nitrogen suspension hydraulic system, comprises main distributing valve 1, hydraulic oil container 3, left boom cylinder 9, right boom cylinder 10, four four-way hydraulicchange-over valves 2, two-bit triplet solenoid operated directional valve 5 and accumulators 6; The A mouth of described main distributing valve 1 connects the A mouth of four four-way hydraulicchange-over valves 2, the large chamber of while left boom cylinder 9 in parallel and right boom cylinder 10, the B mouth of main distributing valve 1 connects the B mouth of four four-way hydraulicchange-over valves 2, simultaneously the loculus of left boom cylinder 9 in parallel and right boom cylinder 10; The T mouth of four described four-way hydraulicchange-over valves 2 connects the P mouth connection accumulator 6 of 3, four four-way hydraulicchange-over valves 2 of hydraulic oil container and the right control chamber of four four-way hydraulicchange-over valves 2; First of four four-way hydraulicchange-over valves 2 is that T mouth is communicated with B mouth, P mouth is communicated with A mouth, and its second is that T mouth is closed with B mouth, P mouth is communicated with A mouth, and its 3rd is that whole interfaces are closed, its 4th be that T mouth is communicated with P mouth, B mouth and A mouth close; The B mouth of described two-bit triplet solenoid operated directional valve 5 and C mouth are connected respectively T mouth and the P mouth of four four-way hydraulicchange-over valves 2, and the A mouth of two-bit triplet solenoid operated directional valve 5 connects the left control chamber of four four-way hydraulicchange-over valves 2; The upper A of the being mouth of two-bit triplet solenoid operated directional valve 5 is communicated with B mouth, C mouth is closed, and its next A of being mouth is communicated with C mouth, B mouth is closed; When loader travel speed reaches setting value, the electromagnet of two-bit triplet solenoid operated directional valve 5 obtains electric, and two-bit triplet solenoid operated directional valve 5 is changed to the next; The left control chamber of the A of described two-bit triplet solenoid operated directional valve 5 mouth and described four four-way hydraulicchange-over valves 2 be connected oil circuit in be provided with choke valve 4, choke valve 4, for cushioning controlled pressure, makes to control more steady; Between the T of described four four-way hydraulicchange-over valves 2 mouth and P mouth, be parallel with respectively overflow valve 7 and 2/2-way reversal valve 8,2/2-way reversal valve 8 is selected manual 2/2-way reversal valve.
When the electromagnet of two-bit triplet solenoid operated directional valve 5 must not electricity, four four-way hydraulicchange-over valves 2 are in shown position, and now the A mouth of main distributing valve 1, to accumulator 6 topping ups, is given the large chamber fuel feeding of left boom cylinder 9 and right boom cylinder 10 simultaneously; When accumulator 6 reaches supercharging pressure setting value, four four-way hydraulicchange-over valves 2 are shifted to the 3rd, stop topping up; If supercharging pressure is greater than the setting value of accumulator 6, four four-way hydraulicchange-over valves 2 are shifted to the 4th of this valve, accumulator 6 is connected with hydraulic oil container 3, accumulator 6 pressure releases, until accumulator 6 is shifted to the 3rd of this valve while being reduced to setting pressure, this is the pressure maintaining effect of four four-way hydraulicchange-over valves 2; When loader travel speed reaches setting value or the electromagnet of controlling two-bit triplet solenoid operated directional valve 5 of manually going beyond one's commission obtains when electric, two-bit triplet solenoid operated directional valve 5 is changed to the next, make the pressure of accumulator 6 by two-bit triplet solenoid operated directional valve 5 and choke valve 4, introduce the left control chamber of four four-way hydraulicchange-over valves 2, make four four-way hydraulicchange-over valves 2 be shifted to first, thereby accumulator 6 is connected with the large chamber of left boom cylinder 9 and right boom cylinder 10, and hydraulic oil container 3 is connected with the loculus of right boom cylinder 10 with left boom cylinder 9; Overflow valve 7 is for the maximum pressure of restriction system; Manually 2/2-way reversal valve 8 for laying down the pressure of accumulator 6 when keeping in repair whole hydraulic system.The vibration of loader is from the displacement excitation on ground, when accumulator 6 is connected with the large chamber of left boom cylinder 9 and right boom cylinder 10, the rigidity of two boom cylinders reduces, the vibration mechanics model of its machine changes into two-freedom support displacement excited vibration system by single-degree-of-freedom support displacement excited vibration system, rationally regulates the parameter of accumulator 6 can reach the usefulness of similar automobile air suspension system.
Claims (1)
1. a loader nitrogen suspension hydraulic system, comprises main distributing valve (1), hydraulic oil container (3), left boom cylinder (9) and right boom cylinder (10);
It is characterized in that:
Also comprise four four-way hydraulicchange-over valves (2), two-bit triplet solenoid operated directional valve (5) and accumulator (6);
The A mouth of described main distributing valve (1) connects the A mouth of four four-way hydraulicchange-over valves (2), the large chamber of while left boom cylinder in parallel (9) and right boom cylinder (10), the B mouth of main distributing valve (1) connects the B mouth of four four-way hydraulicchange-over valves (2), simultaneously the loculus of left boom cylinder in parallel (9) and right boom cylinder (10);
The T mouth of described four four-way hydraulicchange-over valves (2) connects hydraulic oil container (3), and the P mouth of four four-way hydraulicchange-over valves (2) connects the right control chamber of accumulator (6) and four four-way hydraulicchange-over valves (2); First of four four-way hydraulicchange-over valves (2) is that T mouth is communicated with B mouth, P mouth is communicated with A mouth, and its second is that T mouth is closed with B mouth, P mouth is communicated with A mouth, and its 3rd is that whole interfaces are closed, its 4th be that T mouth is communicated with P mouth, B mouth and A mouth close;
The B mouth of described two-bit triplet solenoid operated directional valve (5) and C mouth are connected respectively T mouth and the P mouth of four four-way hydraulicchange-over valves (2), and the A mouth of two-bit triplet solenoid operated directional valve (5) connects the left control chamber of four four-way hydraulicchange-over valves (2); The upper A of the being mouth of two-bit triplet solenoid operated directional valve (5) is communicated with B mouth, C mouth is closed, and its next A of being mouth is communicated with C mouth, B mouth is closed; When loader travel speed reaches setting value, the electromagnet of two-bit triplet solenoid operated directional valve (5) obtains electric, and two-bit triplet solenoid operated directional valve (5) is changed to the next;
The A mouth of described two-bit triplet solenoid operated directional valve (5) and the left control chamber of described four four-way hydraulicchange-over valves (2) be connected oil circuit in be provided with choke valve (4);
Between the T mouth of described four four-way hydraulicchange-over valves (2) and P mouth, be parallel with respectively overflow valve (7) and 2/2-way reversal valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205868.0U CN203808126U (en) | 2014-04-25 | 2014-04-25 | Nitrogen suspension hydraulic system of loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205868.0U CN203808126U (en) | 2014-04-25 | 2014-04-25 | Nitrogen suspension hydraulic system of loader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203808126U true CN203808126U (en) | 2014-09-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420205868.0U Expired - Fee Related CN203808126U (en) | 2014-04-25 | 2014-04-25 | Nitrogen suspension hydraulic system of loader |
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| Country | Link |
|---|---|
| CN (1) | CN203808126U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161068A1 (en) * | 2021-01-29 | 2022-08-04 | 上海三一重机股份有限公司 | Damping system for movable arm of loading machine, and operation machinery |
-
2014
- 2014-04-25 CN CN201420205868.0U patent/CN203808126U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022161068A1 (en) * | 2021-01-29 | 2022-08-04 | 上海三一重机股份有限公司 | Damping system for movable arm of loading machine, and operation machinery |
| EP4219838A4 (en) * | 2021-01-29 | 2024-04-03 | Shanghai Sany Heavy Machinery Limited | Damping system for movable arm of loading machine, and operation machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 |