CN203594637U - Engineering mechanical pressure stabilization oil box device - Google Patents
Engineering mechanical pressure stabilization oil box device Download PDFInfo
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- CN203594637U CN203594637U CN201320754923.7U CN201320754923U CN203594637U CN 203594637 U CN203594637 U CN 203594637U CN 201320754923 U CN201320754923 U CN 201320754923U CN 203594637 U CN203594637 U CN 203594637U
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Abstract
The utility model discloses an engineering mechanical pressure stabilization oil box device which comprises a hydraulic oil box, an oil absorption filter, an oil return filter, an electric air pump, an air overflow valve, an air filter, an oil storage tank and a size exchange tank. The oil absorption filter and the oil return filter are immersed inside hydraulic oil of the hydraulic oil box. The electric air pump, the air overflow valve, the air filter and the oil storage tank are arranged outside the hydraulic oil box. The size exchange tank is fixed into an air layer on the upper side of the hydraulic oil box. One end of the oil absorption filter is connected with an oil absorption port of a hydraulic pump through an oil absorption pipeline. An oil return pipeline of a hydraulic system stretches into the hydraulic oil box to be connected with the oil return filter. The air overflow valve is connected beside the output end of the electric air pump, and then the output end of the electric air pump is sequentially connected with the air filter and one end of the oil storage tank through air pipelines. The oil pipe at the other end of the oil storage tank stretches into the hydraulic oil box to be connected with one end of the size exchange tank. The engineering mechanical pressure stabilization oil box device is simple in structure, and the air pressure inside the hydraulic oil box can be kept stable whether oil is fed into or discharged out of an oil cylinder, so that the bubble amount inside the hydraulic oil box is reduced, and the service life of a hydraulic component is prolonged.
Description
Technical field
The utility model relates to a kind of hydraulic system of engineering machinery, and 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.
Model utility content
The purpose of this utility model is to provide a kind of pressure stabilized oil tank that can make hydraulic oil container inner air pressure keep stable engineering machinery, reduces the bubbles volume producing in hydraulic oil container, extends the working life of hydraulic element.
The utility model is achieved by the following technical programs:
A kind of engineering machinery pressure stabilized oil tank device, comprise the hydraulic oil container of 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.
The purpose of this utility model 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 utility model 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 utility model, by for illustration and explanation the non-limitative illustration by preferred embodiment below, these embodiments, only provide as an example with reference to accompanying drawing.
Accompanying drawing explanation
Fig. 1 is hydraulic schematic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises 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 the each final controlling element of hydraulic system are as oil cylinder, the input ends such as oil hydraulic motor are connected, the each final controlling element output terminal of hydraulic system is got back to control valve group 30 and is connected with return oil filter 3 by the return line 102 of hydraulic system.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.Under the compressed-air actuated effect that fluid in oil storage tank 8 can be exported at electric air pump 5, enter volume-exchange tank 9, or get back in oil storage tank 8 from volume-exchange tank 9.
Working procedure of the present utility model is as follows:
In the time of a large amount of oil-feed rod chamber of the 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, in the time that 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.
In the time of 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 air after pressure raises enters in the interior promotion volume of volume-exchange tank 9 swap tank 9 by the porting 91 of volume-exchange tank 9 is got back in oil storage tank 8 by oil pipe 12, until the maintenance of the air pressure of hydraulic oil upside is constant.
In addition to the implementation, the utility model 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 the utility model requirement.
Claims (2)
1. an engineering machinery pressure stabilized oil tank device, comprise the hydraulic oil container of 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 |
|---|---|---|---|
| CN201320754923.7U CN203594637U (en) | 2013-11-27 | 2013-11-27 | Engineering mechanical pressure stabilization oil box device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320754923.7U CN203594637U (en) | 2013-11-27 | 2013-11-27 | Engineering mechanical pressure stabilization oil box device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203594637U true CN203594637U (en) | 2014-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320754923.7U Expired - Fee Related CN203594637U (en) | 2013-11-27 | 2013-11-27 | Engineering mechanical pressure stabilization oil box device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203594637U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629170A (en) * | 2013-11-27 | 2014-03-12 | 中外合资沃得重工（中国）有限公司 | Engineering machine stabilized-pressure oil tank device |
| CN109162971A (en) * | 2018-11-12 | 2019-01-08 | 燕山大学 | Constant-pressure pressure fuel tank and its control method |
| 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 |
-
2013
- 2013-11-27 CN CN201320754923.7U patent/CN203594637U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629170A (en) * | 2013-11-27 | 2014-03-12 | 中外合资沃得重工（中国）有限公司 | Engineering machine stabilized-pressure oil tank device |
| CN103629170B (en) * | 2013-11-27 | 2016-06-08 | 中外合资沃得重工（中国）有限公司 | Engineering machinery stabilized-pressure oil tank device |
| CN109162971A (en) * | 2018-11-12 | 2019-01-08 | 燕山大学 | Constant-pressure pressure fuel tank and its control method |
| 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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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 |
Granted publication date: 20140514 Termination date: 20151127 |