CN102678680A - Large-capacity hydraulic compensation unit with constant compensation pressure allowance - Google Patents
Large-capacity hydraulic compensation unit with constant compensation pressure allowance Download PDFInfo
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- CN102678680A CN102678680A CN2012101494461A CN201210149446A CN102678680A CN 102678680 A CN102678680 A CN 102678680A CN 2012101494461 A CN2012101494461 A CN 2012101494461A CN 201210149446 A CN201210149446 A CN 201210149446A CN 102678680 A CN102678680 A CN 102678680A
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Abstract
The invention aims at providing a large-capacity hydraulic compensation unit with a constant compensation pressure allowance. The large-capacity hydraulic compensation unit comprises a frame, a bellows, an upper cover plate of the bellows, a bottom plate of the bellows, an integrated valve block, an energy accumulator, a hydraulic cylinder, guide posts and an oil pump, wherein the bottom plate of the bellows and the guide posts are fixed on the frame, the bellows is arranged between the upper cover plate and the bottom plate of the bellows, the guide posts penetrate through the upper cover plate of the bellows, the upper cover plate of the bellows freely moves along the guide posts when the bellows is subjected to elastic expansion in the axial direction, the energy accumulator, the integrated valve block and the hydraulic cylinder are sequentially connected, the energy accumulator and the hydraulic cylinder are respectively fixed on the frame, the hydraulic cylinder is communicated with the bellows, an oil suction pipe and an oil return pipe are arranged inside the bellows, the oil pump is communicated with the oil suction pipe, and the integrated valve block is communicated with the oil return pipe. The large-capacity hydraulic compensation unit can be used for compensating system pressure, and can meet the requirement on larger volume change of system oil due to dissymmetric executive elements and leakage in a large hydraulic system and maintain the constant compensation pressure allowance.
Description
Technical field
What the present invention relates to is a kind of apparatus under water, specifically compensator under water.
Background technique
Underwater hydraulic system is widely used at ocean engineering machinery, Undersea Scientific Expedition, and particularly large-scale, highi degree of accuracy deepwater hydraulic system applies is more next extensively.Compensating unit (device) is one of important step of underwater hydraulic system, and it act as: balance enclosed construction external and internal pressure; System oil return pressure brought up to be a bit larger tham external pressure (exceed external pressure and partly be called the compensatory pressure allowance) in order to external pressure under the equilibrirm water and prevent the seawater invasive system; Compensation is owing to adopting asymmetric executive component and leaking the long-pending variation of the system oil liquid that causes.The existing main type of compensator is piston type, rolling film chip, bellow type etc., and its principle basically all is to adopt elastic element to transmit seawater pressure, and uses length of spring compressed to form the compensatory pressure allowance.But not only the oil liquid leakage amount is bigger for the large hydraulic system; If adopt a large amount of asymmetric executive components such as oil hydraulic cylinder in the system, the fluid volume that needs to compensate can be very big, and existing compensator is owing to adopt spring structure; When fluid change in volume in the compensator is big; The amount of deformation of spring also changes bigger, and corresponding compensation pressure allowance changes and increases, to the precision generation adverse influence of system; When hydraulic line take place to leak, because length of spring compressed is uncontrollable, cause that fluid leaks in a large number in the compensator, until the vanishing of compensatory pressure allowance, this moment, system can't carry out emergency action.Because the restriction (being generally about 0.1MPa) of compensatory pressure allowance, existing principle compensator volume also has considerable restraint, can't satisfy the requirement of large-scale underwater hydraulic system.
Summary of the invention
The object of the present invention is to provide the permanent compensatory pressure allowance of a kind of big volume compensation hydraulic unit that is applied under water, when big cubage compensation is provided, guarantees that the compensatory pressure allowance is constant.
The objective of the invention is to realize like this:
The permanent compensatory pressure allowance of a kind of big volume of the present invention compensation hydraulic unit, it is characterized in that: comprise framework, bellows, bellows upper cover plate, bellows base plate, integrated valve block, accumulator, oil hydraulic cylinder, directional post, oil pump, bellows base plate and directional post are fixed on the framework; Bellows is installed between bellows upper cover plate, the bellows base plate; Directional post passes the bellows upper cover plate, and when bellows generation axial elasticity stretched, the bellows upper cover plate moved freely along directional post; Accumulator, integrated valve block, oil hydraulic cylinder link to each other successively; Accumulator and oil hydraulic cylinder are separately fixed on the framework, and oil hydraulic cylinder is connected with bellows, and bellows interior is provided with fuel sucking pipe and return tube; Oil pump is communicated with fuel sucking pipe, and integrated valve block is communicated with return tube.
The present invention can also comprise:
1, described integrated valve block comprises reduction valve, one-way valve, Pilot operated check valve, relief valve, Solenoid ball valve, p chamber; The oil pump feed road links to each other with the p chamber through reduction valve, one-way valve; The p chamber communicates with accumulator and oil hydraulic cylinder; The p chamber links to each other through the inlet port of Pilot operated check valve, relief valve and oil pump, and the control port of Pilot operated check valve links to each other with the inlet of reduction valve, and the p chamber links to each other through the return tube of Solenoid ball valve bellows.
2, described return tube is higher than fuel sucking pipe, the position of upper cover plate when return tube and fuel sucking pipe upper end position all are lower than bellows generation maximum compressibility.
3, described bellows is a rubber corrugated pipe, and it is the annular metal of rectangle that sectional area is installed in bellows mouth of pipe end, and bellows is axially installed sectional area and is circular annular metal.
4, on the bellows upper cover plate rapid escape valve is housed; Said oil hydraulic cylinder is the deep-sea oil hydraulic cylinder; The inner installation position of oil hydraulic cylinder displacement sensor, displacement transducer detects oil mass signal in the bellows, when oil mass in the bellows is reported to the police during less than setting value; Report to the police the back if executive component does not have the fluid continuous decrease in action and the bellows, and then Solenoid ball valve is connected.
Advantage of the present invention is: the present invention not only can realize the compensation to system pressure, and can satisfy the bigger change in volume of system's fluid that in the large hydraulic system, is caused by asymmetric executive component and leakage, and keeps the compensatory pressure allowance constant.When system leak, produce and report to the police, make the vanishing of pressure allowance, recover, prevent that the problem of emergency action can't be recovered maybe can't realize by system owing to produce excessive leakage and restart post-compensation pressure allowance when system's reparation.This compensating unit is bigger owing to volume, even can in system, replace the function of traditional oil sources, as the oil sources use of whole system, and can expand through the form of a plurality of compensating units parallel connections.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a bellows place structure cross section view radially;
Fig. 3 is a hydraulic schematic diagram of the present invention.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 1～3, the present invention includes framework 1, special rubber corrugated pipe 3, bellows upper cover plate 4, bellows base plate 2, the deep-sea oil hydraulic cylinder 8 of inbuilt displacement sensor, accumulator 7, integrated valve block 5, the compensator units that directional post 10 is formed.It is characterized in that bellows 3 is connected between upper cover plate 4 and the base plate 2, bellows base plate 2 is connected with framework 1; Be connected with a plurality of directional posts 10 on the framework 1, directional post 10 passes the pilot hole of bellows upper cover plate 4, and when making bellows 3 generation axial elasticities flexible, bellows upper cover plate 4 moves freely along directional post 10; Oil hydraulic cylinder 8 one end connecting frames 1, the other end connects bellows upper cover plate 4, through integrated valve block 5 accumulator 7, oil hydraulic cylinder 8, the fuel feeding that reaches system and oil return pipeline is linked to each other.
Two kinds of circumferential annular metals 17,18 are arranged in the said special rubber corrugated pipe 3, and wherein bellows 3 mouth of pipe end annular metal 18 sectional areas are rectangle; Bellows 3 axially is uniformly distributed with annular metal 17 sectional areas for circular.
In bellows upper cover plate 4 pilot holes non-metallic bushings 11 is installed, directional post 10 is slide relative in the lining endoporus.
Said oil hydraulic cylinder 8 is a special-purpose deep-sea oil hydraulic cylinder, inner integrated displacement sensor, and displacement transducer reaches control system with displacement signal, and when oil mass was very few in the bellows 3, control system produces reported to the police.Do not have the executive component action if control system detects, and the fluid continuous decrease in the bellows then is judged as system oil-way to leak, then Solenoid ball valve is connected.
Working principle of the present invention is following:
Shown in accompanying drawing 3, accumulator charges into the nitrogen of certain pressure before the system works, and the set pressure of relief valve 5.4 is slightly smaller than the set pressure of reduction valve 5.1.Oil pump provides pressure oil to make the action of oil hydraulic cylinder final controlling element during system works; Pressure oil charges into the P chamber through reduction valve 5.1 one-way valves 5.2 simultaneously; Because Pilot operated check valve 5.3 conductings; Control port is high pressure, this moment fluid to make the P cavity pressure through relief valve 5.4 overflows be the relief valve set pressure, flow in the bellowss 3 from hydraulic fluid port 15 after the fluid overflow; The P chamber communicates with deep-sea oil hydraulic cylinder 8, makes oil hydraulic cylinder 8 produce constant thrust, the fluctuation that the accumulator 7 that links to each other with the P chamber can absorption pressure, and behind the oil pump fuel cut-off, still to keep the P chamber be set pressure; Oil hydraulic cylinder upper end connecting frame 1; The lower end acts on bellows upper cover plate 4; Rubber corrugated pipe 3 is produced compression; Thereby make the hydraulic oil in the bellows 3 produce constant compensatory pressure allowance, even also keep definite value because the thrust of oil hydraulic cylinder 8 remains constant compensatory pressure allowance when bellows 3 inner fluid volumes change; This moment, external pressure acted on the compensator upper cover plate 4 simultaneously, bellows 3 is produced compressions transfer the pressure to bellows 3 inside, make bellows 3 internal pressures equal external pressure and compensatory pressure allowance and; Bellows 3 is connected respectively to through hydraulic fluid port 13 and 15 on the inlet port and hydraulic system oil circuit of pump, and the pressure in return pressure and the bellows 3 equates.Pressure compensated effect when said process is realized hydraulic work system.
When the inner asymmetric final controlling element of underwater hydraulic system for example hydraulic cylinder works the time; Bellows 3 interior oil liquid are long-pending to change; With producing axial elongating or shortening, because the leading role of many directional posts 10, guarantee that upper cover plate 4 drives bellowss 3 strictnesses along directional post fore and aft motion about in the of 10.Non-metallic bushings 11 is installed, the friction during with the minimizing relative movement in the pilot hole of bellows upper cover plate 4.Said process has been realized the effect of volume compensation, it is to be noted that especially compensatory pressure remains a constant value in this process.
When system quit work, oil pump feed pressure was zero with respect to return pressure, and this moment is identical when accumulator 7 internal pressure homologous rays are worked; Be higher than return pressure; Effect makes accumulator 7 pressure keep constant because one-way valve 5.2 is with Pilot operated check valve 5.3 (control port low pressure, Pilot operated check valve ends), and oil hydraulic cylinder 8 internal pressures that communicate with it are also constant; Corresponding bellows 3 internal pressures remain unchanged the system oil return constant pressure.Pressure compensation effect when this process realization hydraulic system stops.
Be noted that described bellows 3 especially; What adopt is the rubber material; The inner annular metal that adopted 18 and 17 two types, bellows mouth of pipe end sectional area is the annular metal 18 of rectangle, its effect is that the pressure with bolt is distributed on bellows 3 and the sealing surface that upper cover plate 4 and base plate 2 cooperate uniformly; Make it fit tightly anti-heads; The effect of the annular metal 17 that bellows 3 axially is uniformly distributed with is to prevent bellows 3 because the internal pressure effect produces excessive deformation radially, and does not increase axial modulus of elasticity in comperssion, guarantees the constant of compensatory pressure allowance.
Shown in accompanying drawing 2, rapid escape valve 19 effects on the upper cover plate 4 are that the gas when system trys out by land will accumulate in bellows top, through the adjustment outlet valve gas are bled off and avoid influencing systematic function.
Claims (9)
1. the permanent compensatory pressure allowance of one kind big volume compensation hydraulic unit, it is characterized in that: comprise framework, bellows, bellows upper cover plate, bellows base plate, integrated valve block, accumulator, oil hydraulic cylinder, directional post, oil pump, bellows base plate and directional post are fixed on the framework; Bellows is installed between bellows upper cover plate, the bellows base plate; Directional post passes the bellows upper cover plate, and when bellows generation axial elasticity stretched, the bellows upper cover plate moved freely along directional post; Accumulator, integrated valve block, oil hydraulic cylinder link to each other successively; Accumulator and oil hydraulic cylinder are separately fixed on the framework, and oil hydraulic cylinder is connected with bellows, and bellows interior is provided with fuel sucking pipe and return tube; Oil pump is communicated with fuel sucking pipe, and integrated valve block is communicated with return tube.
2. the permanent compensatory pressure allowance of a kind of big volume according to claim 1 compensation hydraulic unit; It is characterized in that: described integrated valve block comprises reduction valve, one-way valve, Pilot operated check valve, relief valve, Solenoid ball valve, p chamber; The oil pump feed road links to each other with the p chamber through reduction valve, one-way valve; The p chamber communicates with accumulator and oil hydraulic cylinder; The p chamber links to each other through the inlet port of Pilot operated check valve, relief valve and oil pump, and the control port of Pilot operated check valve links to each other with the inlet of reduction valve, and the p chamber links to each other through the return tube of Solenoid ball valve bellows.
3. the permanent compensatory pressure allowance of a kind of big volume according to claim 1 and 2 compensation hydraulic unit, it is characterized in that: described return tube is higher than fuel sucking pipe, the position of upper cover plate when return tube and fuel sucking pipe upper end position all are lower than bellows generation maximum compressibility.
4. the permanent compensatory pressure allowance of a kind of big volume according to claim 1 and 2 compensation hydraulic unit; It is characterized in that: described bellows is a rubber corrugated pipe; It is the annular metal of rectangle that sectional area is installed in bellows mouth of pipe end, and bellows is axially installed sectional area and is circular annular metal.
5. the permanent compensatory pressure allowance of a kind of big volume according to claim 3 compensation hydraulic unit; It is characterized in that: described bellows is a rubber corrugated pipe; It is the annular metal of rectangle that sectional area is installed in bellows mouth of pipe end, and bellows is axially installed sectional area and is circular annular metal.
6. the permanent compensatory pressure allowance of a kind of big volume according to claim 1 and 2 compensation hydraulic unit; It is characterized in that: on the bellows upper cover plate rapid escape valve is housed, said oil hydraulic cylinder is the deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor; Displacement transducer detects oil mass signal in the bellows; Report to the police during less than setting value when oil mass in the bellows, the back of reporting to the police is not if executive component have the fluid continuous decrease in action and the bellows, then Solenoid ball valve connection.
7. the permanent compensatory pressure allowance of a kind of big volume according to claim 3 compensation hydraulic unit; It is characterized in that: on the bellows upper cover plate rapid escape valve is housed, said oil hydraulic cylinder is the deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor; Displacement transducer detects oil mass signal in the bellows; Report to the police during less than setting value when oil mass in the bellows, the back of reporting to the police is not if executive component have the fluid continuous decrease in action and the bellows, then Solenoid ball valve connection.
8. the permanent compensatory pressure allowance of a kind of big volume according to claim 4 compensation hydraulic unit; It is characterized in that: on the bellows upper cover plate rapid escape valve is housed, said oil hydraulic cylinder is the deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor; Displacement transducer detects oil mass signal in the bellows; Report to the police during less than setting value when oil mass in the bellows, the back of reporting to the police is not if executive component have the fluid continuous decrease in action and the bellows, then Solenoid ball valve connection.
9. the permanent compensatory pressure allowance of a kind of big volume according to claim 5 compensation hydraulic unit; It is characterized in that: on the bellows upper cover plate rapid escape valve is housed, said oil hydraulic cylinder is the deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor; Displacement transducer detects oil mass signal in the bellows; Report to the police during less than setting value when oil mass in the bellows, the back of reporting to the police is not if executive component have the fluid continuous decrease in action and the bellows, then Solenoid ball valve connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210149446.1A CN102678680B (en) | 2012-05-15 | 2012-05-15 | Large-capacity hydraulic compensation unit with constant compensation pressure allowance |
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| CN201210149446.1A CN102678680B (en) | 2012-05-15 | 2012-05-15 | Large-capacity hydraulic compensation unit with constant compensation pressure allowance |
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| CN102678680B CN102678680B (en) | 2014-10-22 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000565A3 (en) * | 2013-07-03 | 2015-07-02 | Hydac Technology Gmbh | Device for adjusting a media pressure relative to an ambient pressure |
| CN105697433A (en) * | 2014-11-24 | 2016-06-22 | 徐工集团工程机械股份有限公司 | Supercharged pressure compensator and pressure monitoring method thereof |
| CN106787382A (en) * | 2017-01-21 | 2017-05-31 | 胜利油田胜利泵业有限责任公司 | Motor pressure compensator under a kind of high power oil-filled deep diving |
| CN108319304A (en) * | 2018-01-22 | 2018-07-24 | 中国海洋石油集团有限公司 | A kind of annular deep sea pressure compensator |
| CN109236762A (en) * | 2018-10-16 | 2019-01-18 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Integral type deep-sea hydraulic power supply |
| CN111045498A (en) * | 2019-03-29 | 2020-04-21 | 淮安信息职业技术学院 | Computer isolatable strengthening cooling device based on automation |
| CN111351457A (en) * | 2020-02-21 | 2020-06-30 | 国家电网有限公司 | Method and device for measuring residual elongation of top cover bolt of pumped storage unit |
| CN111473006A (en) * | 2020-04-23 | 2020-07-31 | 中国铁建重工集团股份有限公司 | Pressure compensator |
| CN111577677A (en) * | 2020-05-28 | 2020-08-25 | 中国铁建重工集团股份有限公司 | Pressure compensation system |
| CN111975596A (en) * | 2020-08-23 | 2020-11-24 | 吉林大学 | Copying grinding device suitable for underwater environment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN105697433A (en) * | 2014-11-24 | 2016-06-22 | 徐工集团工程机械股份有限公司 | Supercharged pressure compensator and pressure monitoring method thereof |
| CN106787382A (en) * | 2017-01-21 | 2017-05-31 | 胜利油田胜利泵业有限责任公司 | Motor pressure compensator under a kind of high power oil-filled deep diving |
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| CN108319304A (en) * | 2018-01-22 | 2018-07-24 | 中国海洋石油集团有限公司 | A kind of annular deep sea pressure compensator |
| CN109236762A (en) * | 2018-10-16 | 2019-01-18 | 中国船舶科学研究中心（中国船舶重工集团公司第七0二研究所） | Integral type deep-sea hydraulic power supply |
| CN111045498A (en) * | 2019-03-29 | 2020-04-21 | 淮安信息职业技术学院 | Computer isolatable strengthening cooling device based on automation |
| CN111351457A (en) * | 2020-02-21 | 2020-06-30 | 国家电网有限公司 | Method and device for measuring residual elongation of top cover bolt of pumped storage unit |
| CN111473006A (en) * | 2020-04-23 | 2020-07-31 | 中国铁建重工集团股份有限公司 | Pressure compensator |
| CN111577677A (en) * | 2020-05-28 | 2020-08-25 | 中国铁建重工集团股份有限公司 | Pressure compensation system |
| CN111577677B (en) * | 2020-05-28 | 2022-03-01 | 中国铁建重工集团股份有限公司 | Pressure compensation system |
| CN111975596A (en) * | 2020-08-23 | 2020-11-24 | 吉林大学 | Copying grinding device suitable for underwater environment |
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