CN102678680B - 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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- CN102678680B CN102678680B CN201210149446.1A CN201210149446A CN102678680B CN 102678680 B CN102678680 B CN 102678680B CN 201210149446 A CN201210149446 A CN 201210149446A CN 102678680 B CN102678680 B CN 102678680B
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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 is brought up to and is a bit larger tham external pressure (exceed external pressure and be partly called compensatory pressure allowance) in order to external pressure under equilibrirm water and prevents seawater invasive system; Compensation is owing to adopting asymmetric executive component and leaking the system oil liquid Volume Changes causing.Existing compensator main Types is piston type, rolling film chip, bellow type etc., and its principle is substantially all to adopt elastic element to transmit seawater pressure, and uses spring-compressed to form compensatory pressure allowance.But for Large Hydraulic System, not only oil liquid leakage amount is larger, if adopt a large amount of asymmetric executive components such as oil hydraulic cylinder in system, the fluid volume that need to compensate can be very large, existing compensator is owing to adopting spring structure, when in compensator, fluid Volume Changes is larger, the amount of deformation of spring also changes larger, and corresponding compensatory pressure allowance changes and increases, and the precision of system is produced to adverse influence; When hydraulic line occurs to leak, because spring-compressed is uncontrollable, cause fluid in compensator to leak in a large number, until the vanishing of compensatory pressure allowance, now system cannot be carried out emergency action.Due to the abundant quantitative limitation of compensatory pressure (being generally 0.1MPa left and right), existing principle compensator volume also has considerable restraint, cannot meet the requirement of Large Underwater hydraulic system.
Summary of the invention
The object of the present invention is to provide the permanent compensatory pressure allowance compensation hydraulic of a kind of large volume unit that is applied under water, guarantees that compensatory pressure allowance is constant when large cubage compensation is provided.
The object of the present invention is achieved like this:
The present invention's permanent compensatory pressure allowance compensation hydraulic of a kind of large volume 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 framework, bellows is arranged on bellows upper cover plate, between bellows base plate, directional post is through bellows upper cover plate, when bellows generation axial elasticity stretches, bellows upper cover plate moves freely along directional post, accumulator, integrated valve block, oil hydraulic cylinder is connected successively, accumulator and oil hydraulic cylinder are separately fixed on framework, oil hydraulic cylinder is connected with bellows, bellows interior arranges fuel sucking pipe and return tube, oil pump is communicated with fuel sucking pipe, 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, oil pump feed road is connected with p chamber by reduction valve, one-way valve, p chamber communicates with accumulator and oil hydraulic cylinder, p chamber is connected by the inlet port of Pilot operated check valve, relief valve and oil pump, the control port of Pilot operated check valve is connected with the entrance of reduction valve, and p chamber is connected with the return tube of bellows by Solenoid ball valve.
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 produce maximum compressibility lower than bellows.
3, described bellows is rubber corrugated pipe, and the annular metal that sectional area is rectangle is installed in bellows mouth of pipe end, and it is circular annular metal that bellows is axially installed sectional area.
4, on bellows upper cover plate, rapid escape valve is housed, described oil hydraulic cylinder is deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor, displacement transducer detects oil mass signal in bellows, in bellows, oil mass is less than setting value alarm, if executive component does not have the fluid continuous decrease in action and bellows after reporting to the police, 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 meet the larger Volume Changes of system fluid being caused by asymmetric executive component and leakage in Large Hydraulic System, and keeps compensatory pressure allowance constant.When system leak, produce and report to the police, make the vanishing of pressure allowance, and restart post-compensation pressure allowance when system reparation, recover, prevent that system cannot recover maybe cannot realize the problem of emergency action owing to producing excessive leakage.This compensating unit, because volume is larger, even can replace the function of traditional oil sources in system, as the oil sources use of whole system, and can expand by the form of a plurality of compensating unit parallel connections.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is bellows place structure cross section view radially;
Fig. 3 is hydraulic schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
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 forms.It is characterized in that bellows 3 is connected between upper cover plate 4 and base plate 2, bellows base plate 2 is connected with framework 1; On framework 1, be connected with a plurality of directional posts 10, directional post 10 is through the pilot hole of bellows upper cover plate 4, and when bellows 3 generation axial elasticities are stretched, 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, by integrated valve block 5, the fuel feeding of accumulator 7, oil hydraulic cylinder 8 and system and oil return pipeline is connected.
Integrated valve block 5 comprises reduction valve 5.1, one-way valve 5.2, Pilot operated check valve 5.3, relief valve 5.4, Solenoid ball valve 5.5.Being connected with p chamber by reduction valve 5.1, one-way valve 5.2 for oil circuit of system, p chamber communicates with accumulator 7 and oil hydraulic cylinder 8; P chamber is connected by Pilot operated check valve 5.3, the relief valve 5.4 and oil circuit of system and the inlet port of oil pump, and wherein the control port of Pilot operated check valve 5.3 is connected with the entrance of reduction valve 5.1; P chamber is connected with system oil return road by Solenoid ball valve 5.5 again.
In described special rubber corrugated pipe 3, have two kinds of circumferential annular metals 17,18, wherein bellows 3 mouth of pipe end annular metal 18 sectional areas are rectangle; Axial uniform annular metal 17 sectional areas of bellows 3 are circular.
In bellows upper cover plate 4 pilot holes, non-metallic bushings 11 is installed, directional post 10 is relative sliding in lining endoporus.
Rapid escape valve 19 is housed on bellows upper cover plate 4, slug 12 and 14 are installed on bellows base plate 2, in order to connecting tube joint and fuel sucking pipe 13 and return tube 15, wherein return tube 15 will be higher than fuel sucking pipe 13, but the position of upper cover plate 4 when upper end position all will produce maximum compressibility lower than bellows 3.
Described oil hydraulic cylinder 8 is special-purpose deep-sea oil hydraulic cylinder, inner integrated displacement sensor, and displacement transducer reaches control system by displacement signal, and when the interior oil mass of bellows 3 is very few, control system produces reports to the police.If control system detects, there is no executive component action, and fluid continuous decrease in bellows is judged as system oil-way to leak Solenoid ball valve connection.
Working principle of the present invention is as follows:
As shown in Figure 3, before system works, accumulator is filled with the nitrogen of certain pressure, and the set pressure of relief valve 5.4 is slightly smaller than to the set pressure of reduction valve 5.1.During system works, oil pump provides pressure oil to make the action of oil hydraulic cylinder final controlling element, pressure oil is filled with P chamber by reduction valve 5.1 one-way valves 5.2 simultaneously, due to Pilot operated check valve 5.3 conductings, control port is high pressure, now by relief valve 5.4 overflows, to make P cavity pressure be relief valve set pressure to fluid, after fluid overflow, from hydraulic fluid port 15, flows in bellowss 3; P chamber communicates with deep-sea oil hydraulic cylinder 8, makes oil hydraulic cylinder 8 produce constant thrust, the fluctuation that the accumulator 7 being connected with P chamber can absorption pressure, and after oil pump fuel cut-off, still to keep P chamber be set pressure; Oil hydraulic cylinder upper end connecting frame 1, lower end acts on bellows upper cover plate 4, rubber corrugated pipe 3 is produced to compression, thereby make the hydraulic oil in bellows 3 produce constant compensatory pressure allowance, even if the thrust changing due to oil hydraulic cylinder 8 when bellows 3 inner fluid volumes remains that constant compensatory pressure allowance also keeps definite value; Now external pressure acts on compensator upper cover plate 4 simultaneously, bellows 3 is produced to compressions and 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 by hydraulic fluid port 13 and 15 on the inlet port and hydraulic system oil circuit of pump, and the pressure in return pressure and 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 is for example when hydraulic cylinder works, bellows 3 interior oil liquid are long-pending to change, by producing axial elongating or shortening, due to the leading role of many directional posts 10, guarantee that upper cover plate 4 drives bellowss 3 strictly along directional post fore and aft motion Shang Xia 10.Non-metallic bushings 11 is installed in the pilot hole of bellows upper cover plate 4, the friction when reducing relative movement.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 quits work, oil pump feed pressure is zero with respect to return pressure, identical during now accumulator 7 internal pressure homologous ray work, higher than return pressure, because one-way valve 5.2 and Pilot operated check valve 5.3 (control port low pressure, Pilot operated check valve cut-off) effect makes accumulator 7 pressure keep constant, oil hydraulic cylinder 8 internal pressures that communicate with it are also constant, corresponding bellows 3 internal pressures remain unchanged, system oil return constant pressure.Pressure compensation effect when this process implementation hydraulic system stops.
The inner fluid continuous decrease of bellows 3 when hydraulic system produces leakage, bellows 3 shrinks and drives oil hydraulic cylinder 8 to extend simultaneously, when oil hydraulic cylinder 8 elongations reach warning position, the displacement signal trigger alarm that the displacement transducer of 8 inside produces.Solenoid ball valve in integrated valve block 5.5 energisings simultaneously, accumulator 7 and system oil return road are connected, accumulator 7 pressure are laid down with oil circuit and are equated, oil hydraulic cylinder 8 becomes unsteady, the vanishing of pressure compensation allowance, system stops rear internal pressure and equates with external pressure, now leaks and will be kept to minimum, to wait for corresponding emergency measure.After hydraulic system leakage is repaired, system again starts post-compensation pressure and recovers setting value.The emergency function of anti-excessive leakage when this compensating unit of this process has been realized hydraulic system leakage, has prevented the situation that hydraulic oil light leak system cannot be recovered.
Be noted that especially described bellows 3, what adopt is quality of rubber materials, the inner annular metal that adopted 18 and 17 liang of classes, the annular metal 18 that bellows mouth of pipe end sectional area is rectangle, its effect is that the pressure of bolt is distributed on the sealing surface that bellows 3 coordinates with upper cover plate 4 and base plate 2 uniformly, make it fit tightly Leakage prevention, the bellows 3 axially effect of uniform annular metal 17 is to prevent that bellows 3 is because internal pressure effect produces excessive deformation radially, and do not increase axial modulus of elasticity in comperssion, guarantee the constant of compensatory pressure allowance.
As shown in Figure 2, rapid escape valve 19 effects on upper cover plate 4 are that the gas when system is tried out by land will be gathered in bellows top, by adjusting outlet valve, gas are bled off and avoid affecting systematic function.
Claims (5)
1. the permanent compensatory pressure allowance compensation hydraulic of a large volume 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 framework, bellows is arranged on bellows upper cover plate, between bellows base plate, directional post is through bellows upper cover plate, when bellows generation axial elasticity stretches, bellows upper cover plate moves freely along directional post, accumulator, integrated valve block, oil hydraulic cylinder is connected successively, accumulator and oil hydraulic cylinder are separately fixed on framework, oil hydraulic cylinder is connected with bellows, bellows interior arranges fuel sucking pipe and return tube, oil pump is communicated with fuel sucking pipe, integrated valve block is communicated with return tube,
Described integrated valve block comprises reduction valve, one-way valve, Pilot operated check valve, relief valve, Solenoid ball valve, p chamber, oil pump feed road is connected with p chamber by reduction valve, one-way valve, p chamber communicates with accumulator and oil hydraulic cylinder, p chamber is connected by the inlet port of Pilot operated check valve, relief valve and oil pump, the control port of Pilot operated check valve is connected with the entrance of reduction valve, and p chamber is connected with the return tube of bellows by Solenoid ball valve.
2. the permanent compensatory pressure allowance compensation hydraulic of a kind of large volume according to claim 1 unit, 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 produce maximum compressibility lower than bellows.
3. the permanent compensatory pressure allowance compensation hydraulic of a kind of large volume according to claim 1 and 2 unit, it is characterized in that: described bellows is rubber corrugated pipe, the annular metal that sectional area is rectangle is installed in bellows mouth of pipe end, and it is circular annular metal that bellows is axially installed sectional area.
4. the permanent compensatory pressure allowance compensation hydraulic of a kind of large volume according to claim 1 and 2 unit, it is characterized in that: on bellows upper cover plate, rapid escape valve is housed, described oil hydraulic cylinder is deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor, displacement transducer detects oil mass signal in bellows, in bellows, oil mass is less than setting value alarm, if executive component does not have the fluid continuous decrease in action and bellows after reporting to the police, Solenoid ball valve is connected.
5. the permanent compensatory pressure allowance compensation hydraulic of a kind of large volume according to claim 3 unit, it is characterized in that: on bellows upper cover plate, rapid escape valve is housed, described oil hydraulic cylinder is deep-sea oil hydraulic cylinder, the inner installation position of oil hydraulic cylinder displacement sensor, displacement transducer detects oil mass signal in bellows, in bellows, oil mass is less than setting value alarm, if executive component does not have the fluid continuous decrease in action and bellows after reporting to the police, Solenoid ball valve is connected.
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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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| CN102678680A CN102678680A (en) | 2012-09-19 |
| CN102678680B true CN102678680B (en) | 2014-10-22 |
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| DE102013011115A1 (en) | 2013-07-03 | 2015-01-08 | Hydac Technology Gmbh | Device for setting a media pressure with respect 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 |
| CN108319304B (en) * | 2018-01-22 | 2020-10-09 | 中国海洋石油集团有限公司 | Annular deep sea pressure compensator |
| CN109236762B (en) * | 2018-10-16 | 2020-08-04 | 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） | Integrated deep sea hydraulic power source |
| 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 |
| CN111351457B (en) * | 2020-02-21 | 2022-01-25 | 国家电网有限公司 | Method and device for measuring residual elongation of top cover bolt of pumped storage unit |
| CN111473006B (en) * | 2020-04-23 | 2022-08-23 | 中国铁建重工集团股份有限公司 | Pressure compensator |
| 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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