CN103629170A - Engineering machine stabilized-pressure oil tank device - Google Patents
Engineering machine stabilized-pressure oil tank device Download PDFInfo
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- CN103629170A CN103629170A CN201310607102.5A CN201310607102A CN103629170A CN 103629170 A CN103629170 A CN 103629170A CN 201310607102 A CN201310607102 A CN 201310607102A CN 103629170 A CN103629170 A CN 103629170A
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Abstract
The invention discloses an engineering machine stabilized-pressure oil tank device. The engineering machine stabilized-pressure oil tank device comprises a hydraulic oil tank, an oil absorbing and filtering device, a return oil filter, an electric air pump, an air overflow valve, an air filter, an oil storage tank and a volume exchange tank, wherein the oil absorbing and filtering device and the return oil filterer soak inside hydraulic oil in the hydraulic oil tank; the electric air pump, the air overflow valve, the air filter and the oil storage tank are arranged outside the hydraulic oil tank; the volume exchange tank is fixed into an air layer on the upper side of the hydraulic oil tank, one end of the oil absorbing and filtering device is connected with a hydraulic pump oil absorbing opening through an oil absorbing pipeline, and a return oil pipeline of a hydraulic system stretches into the hydraulic oil tank and is connected with the return oil filter. The output end of the electric air pump is connected with an air overflow valve beside the output end and is then sequentially connected with one end of the air filter and one end of the oil storage tank through an air pipeline, and an oil pipe at the other end of the oil storage tank stretches into the hydraulic oil tank and is connected with one end of the volume exchange tank. The engineering machine stabilized-pressure oil tank device is simple in structure, air pressure inside the hydraulic oil tank can be kept stable no matter whether oil enters a hydraulic cylinder or is discharged from the hydraulic cylinder, and therefore the number of bubbles in the hydraulic oil tank can be reduced, and the service life of a hydraulic element can be prolonged.
Description
Technical field
The present invention relates to a kind of hydraulic system of engineering machinery, especially a kind of pressure stabilized oil tank that can make hydraulic oil container inner air pressure keep stablizing, improving hydraulic oil oil suction effect, belongs to engineering machinery hydraulic drive technology field.
Background technique
The complete machine compact in design of the engineering machinery such as excavator, loader, hoist, pavement construction machine, wherein the hydraulic oil container of part engineering machinery is far away apart from oil hydraulic pump, and the hydraulic oil liquid level height in hydraulic oil container cannot meet oil hydraulic pump usage requirement, cause oil hydraulic pump oil suction not smooth, form vacuum, produce a large amount of bubbles, had a strong impact on the working life of hydraulic element.In order to reduce the oil suction resistance of oil hydraulic pump, the oil hydraulic pump inlet port of some engineering machinery dedicated hydraulic system does not fill oil-suction oil filter, but must improve the turbidity test of hydraulic oil, in actual use, because engineering machinery is constructed in the rugged environment of dust from flying in the wild, the turbidity test of hydraulic oil are difficult to reach requirement, reach requirement as wanted, user cost is too high, cannot drop into actual use.
Summary of the invention
The object of this invention is to provide a kind of pressure stabilized oil tank that can make hydraulic oil container inner air pressure keep stable engineering machinery, reduce the bubbles volume producing in hydraulic oil container, extend the working life of hydraulic element.
The present invention is achieved by the following technical programs:
A kind of engineering machinery pressure stabilized oil tank device, the hydraulic oil container that comprises sealing, be immersed in oil-suction oil filter and return oil filter in hydraulic oil container hydraulic oil, be arranged on gas overload valve on hydraulic oil container, be arranged on electric air pump, air bleed valve, air filter and oil storage tank outside hydraulic oil container, be fixed on the volume-exchange tank in hydraulic oil container upside air layer, oil-suction oil filter one end is connected with oil hydraulic pump inlet port by inlet line, and the return line of hydraulic system puts in hydraulic oil container and is connected with return oil filter; Electric air pump output terminal side is connected with air filter and oil storage tank one end successively by air pipe line after connecing air bleed valve, and the oil pipe of the oil storage tank the other end puts in hydraulic oil container and is connected with volume-exchange tank one end.
Object of the present invention can also further realize by following technical measures.
Aforesaid engineering machinery pressure stabilized oil tank device, the porting of wherein said volume-exchange tank deviates from hydraulic oil liquid level in hydraulic oil container.
The present invention is simple in structure, no matter oil cylinder oil inlet or oil extraction, and hydraulic oil container internal air pressure all can keep balance, thereby reduces the bubbles volume in hydraulic oil container, makes the air pressure in hydraulic oil container casing keep stable, extends hydraulic element working life.
Advantage and disadvantage of the present invention, the non-limitative illustration by preferred embodiment below is for illustration and explanation, and these embodiments, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1, the present invention includes the hydraulic oil container 1 of sealing, be immersed in oil-suction oil filter 2 and return oil filter 3 in hydraulic oil container hydraulic oil, be arranged on the gas overload valve 4 on hydraulic oil container 1, be arranged on the electric air pump 5 outside hydraulic oil container, air bleed valve 6, air filter 7, oil storage tank 8 and be fixed on the volume-exchange tank 9 in hydraulic oil container 1 upside air layer, oil-suction oil filter 2 one end are connected with oil hydraulic pump inlet port 201 by inlet line 101, oil hydraulic pump oil outlet 202 is connected with control valve group 30 input ends, control valve group 30 output terminals and each final controlling element of hydraulic system are as oil cylinder, the input ends such as oil hydraulic motor are connected, each final controlling element output terminal of hydraulic system is got back to control valve group 30 and also by the return line 102 of hydraulic system, is connected with return oil filter 3.The other rear air pipe line 11 that passes through of air bleed valve 6 that connects of electric air pump output terminal 51 is connected with air filter 7 and oil storage tank 8 one end successively, and the oil pipe 12 of oil storage tank 8 the other ends puts in hydraulic oil container 1 and is connected with volume-exchange tank 9 one end.Volume-exchange tank 9 portings 91 deviate from hydraulic oil liquid level in hydraulic oil container, prevent that hydraulic oil from entering in volume-exchange tank 9.Air bleed valve 6 is for setting the compressed-air actuated air pressure of input oil storage tank 8, and the air pressure that the present embodiment air bleed valve 6 is set is 0.12MPa.Fluid in oil storage tank 8 can, under the compressed-air actuated effect of electric air pump 5 outputs, enter volume-exchange tank 9, or get back in oil storage tank 8 from volume-exchange tank 9.
Working procedure of the present invention is as follows:
When a large amount of oil-feed rod chamber of each oil cylinder rodless cavity oil return of engineering machinery, when now oil suction volume is greater than oil return volume, the interior hydraulic oil liquid level of hydraulic oil container 1 declines, the air pressure of hydraulic oil upside declines and even occurs vacuum, when the air pressure probe in hydraulic oil container 1 detects air pressure lower than setting value, electric air pump 5 starts, pressurized air enters oil storage tank 8 by air pipe line 11, oil storage tank 8 gases force the fluid of oil storage tank 8 to flow in the volume-exchange tank 9 in the interior upside air layer of hydraulic oil container 1 by oil pipe 12, air pressure in volume-exchange tank 9 is raise, air after pressure raises enters in the interior upside air layer of hydraulic oil container 1 by the porting 91 of volume-exchange tank, make the air pressure of hydraulic oil upside increase, finally make the air pressure in hydraulic oil container 1 remain in air bleed valve 6 ranges of set value.
When each cylinder rod chamber oil-feed rodless cavity oil return of engineering machinery, when now oil return volume is greater than oil suction volume, the interior hydraulic oil liquid level of hydraulic oil container 1 rises, the air pressure of hydraulic oil upside also rises, the fluid that the porting 91 of air after pressure raises by volume-exchange tank 9 enters in the interior promotion volume of volume-exchange tank 9 swap tank 9 is got back in oil storage tank 8 by oil pipe 12, until that the air pressure of hydraulic oil upside keeps is constant.
In addition to the implementation, the present invention can also have other mode of executions, and all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (2)
1. an engineering machinery pressure stabilized oil tank device, the hydraulic oil container that comprises sealing, be immersed in oil-suction oil filter and return oil filter in hydraulic oil container hydraulic oil, and be arranged on the gas overload valve on hydraulic oil container, oil-suction oil filter one end is connected with oil hydraulic pump inlet port by inlet line, and the return line of hydraulic system puts in hydraulic oil container and is connected with return oil filter; It is characterized in that, also comprise the electric air pump, air bleed valve, air filter and the oil storage tank that are arranged on outside hydraulic oil container, be fixed on the volume-exchange tank in hydraulic oil container upside air layer; Electric air pump output terminal side is connected with air filter and oil storage tank one end successively by air pipe line after connecing air bleed valve, and the oil pipe of the oil storage tank the other end puts in hydraulic oil container and is connected with volume-exchange tank one end.
2. engineering machinery pressure stabilized oil tank device as claimed in claim 1, is characterized in that, the porting of described volume-exchange tank deviates from hydraulic oil liquid level in hydraulic oil container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607102.5A CN103629170B (en) | 2013-11-27 | 2013-11-27 | Engineering machinery stabilized-pressure oil tank device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607102.5A CN103629170B (en) | 2013-11-27 | 2013-11-27 | Engineering machinery stabilized-pressure oil tank device |
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| CN103629170A true CN103629170A (en) | 2014-03-12 |
| CN103629170B CN103629170B (en) | 2016-06-08 |
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| CN201310607102.5A Active CN103629170B (en) | 2013-11-27 | 2013-11-27 | Engineering machinery stabilized-pressure oil tank device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240347A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Overhaul method capable of avoiding oil drainage of hydraulic oil tank |
| CN109162971A (en) * | 2018-11-12 | 2019-01-08 | 燕山大学 | Constant-pressure pressure fuel tank and its control method |
| CN113389762A (en) * | 2021-06-11 | 2021-09-14 | 徐州徐工挖掘机械有限公司 | Hydraulic system with pressurization system for hydraulic excavator and control method thereof |
| CN113803305A (en) * | 2021-08-16 | 2021-12-17 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
| CN114278629A (en) * | 2021-11-24 | 2022-04-05 | 中联重科土方机械有限公司 | Hydraulic oil tank, hydraulic system and air pressure balancing method of hydraulic oil tank |
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2013
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| JPH07293501A (en) * | 1994-04-20 | 1995-11-07 | Toyooki Kogyo Co Ltd | Oil tank |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240347A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Overhaul method capable of avoiding oil drainage of hydraulic oil tank |
| CN109162971A (en) * | 2018-11-12 | 2019-01-08 | 燕山大学 | Constant-pressure pressure fuel tank and its control method |
| CN113389762A (en) * | 2021-06-11 | 2021-09-14 | 徐州徐工挖掘机械有限公司 | Hydraulic system with pressurization system for hydraulic excavator and control method thereof |
| CN113803305A (en) * | 2021-08-16 | 2021-12-17 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
| CN113803305B (en) * | 2021-08-16 | 2024-04-02 | 中联重科土方机械有限公司 | Control method and control system of air pressure balance control device and engineering machinery |
| CN114278629A (en) * | 2021-11-24 | 2022-04-05 | 中联重科土方机械有限公司 | Hydraulic oil tank, hydraulic system and air pressure balancing method of hydraulic oil tank |
| CN114278629B (en) * | 2021-11-24 | 2024-03-22 | 中联重科土方机械有限公司 | Hydraulic oil tank, hydraulic system and air pressure balancing method of hydraulic oil tank |
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| Publication number | Publication date |
|---|---|
| CN103629170B (en) | 2016-06-08 |
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Application publication date: 20140312 Assignee: JIANGSU ZHENJI MACHINERY MANUFACTURING Co.,Ltd. Assignor: SINO-FOREIGN JOINT VENTURE WORLD HEAVY INDUSTRY (CHINA) Co.,Ltd. Contract record no.: X2023320000082 Denomination of invention: Pressurized oil tank device of construction machinery Granted publication date: 20160608 License type: Common License Record date: 20230206 |