CN202007082U - Hydraulic energy-saving system of port crane - Google Patents
Hydraulic energy-saving system of port crane Download PDFInfo
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- CN202007082U CN202007082U CN2009200762226U CN200920076222U CN202007082U CN 202007082 U CN202007082 U CN 202007082U CN 2009200762226 U CN2009200762226 U CN 2009200762226U CN 200920076222 U CN200920076222 U CN 200920076222U CN 202007082 U CN202007082 U CN 202007082U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
A hydraulic energy-saving system of a port crane is an additional device of the port crane and used for converting potential energy before a weight declines every time into pressure energy of fluid to be stored into a hydraulic accumulator by the aid of a plurality of variable plunger-type fuel pumps serially mounted in a lifting transmission system and driven by a gear pair and hydraulic system units for the variable plunger-type fuel pumps during frequent lifting and descending of a crane for loading and unloading cargoes. When the weight is required to be lifted, the pressure energy is released to drive an oil pump (depending on working condition of an oil motor at the moment) to supply lifting torque, and the weight is lifted by the oil pump and an original crane lifting power system jointly, so that the weight potential energy is utilized and the purpose of energy conservation is achieved. The hydraulic energy-saving system is parallelly connected with an original crane mechanical and electrical system, convenient in connection and matching, simple in system, long in service life, not only applied to various port crane machinery, but also applied to other crane and lifting equipment in other industries, so that a great quantity of energy resources are economized, and emission of 'three wastes' (waste gas, waste water and industrial residue)caused by acquisition of the energy resources is decreased.
Description
Technical field:
The utility model hydraulic energy saving system for harbour crane is the additional device of harbour crane.It is in the frequent lifting and decline process of crane handling goods, with the each preceding potential energy that descends of weight, by oil pump and the hydraulic efficiency pressure system unit that is installed in parallel with the former lifting drive system of crane, the pressure that converts fluid to can and be stored in the hydraulic accumulator, when need promote weight, this pressure can be discharged drive oil pump (being the oil motor operating mode this moment) the lifting torque is provided, promote weight jointly with the former lifting power system of crane (diesel engine, motor etc.), make weight potential energy obtain utilizing, to reach purpose of energy saving.Belong to mechanical design field.
Background technology:
Tyre crane, bridge crane, track hang with major port elevator machinery such as gantry crane and widely apply at harbour all over the world, bear the loading, unloading and the storage yard operation of several hundred million tons of freight all kinds, the development of freight container traffic and popularize has improved the work efficiency of harbour crane widely, has enlarged the loading and unloading capacity at harbour.All kinds of harbour cranes are the big power consumers at harbour, and often need there be oneself independently power plant and supply network in big harbour.Reduce the energy consumption of harbour crane, become user's an urgent demand and the important development direction of all kinds of harbour crane design and manufacturing technologies.
As everyone knows, the hoisting capacity of harbour crane (containing suspender frame etc.) usually is tens tons even ton up to a hundred, and they all drive rope drum by power machine (diesel engine, motor etc.) by the drop-gear box output torque and promote.The major part of the energy that is consumed is used to overcome the potential energy that gravity work production is converted to weight, the operational mode of present most harbour cranes is: in controlled weight decline process, the potential energy of weight is often by mechanical friction, electric current--and approach such as resistance or the resistance of hydraulic circuit liquid are transformed into heat energy and are dispersed in the surrounding environment.Wherein electric current-resistance is the most frequently used energy transition pathway, its process is to drive to promote the electrical motor counter-rotating in weight decline process, make it become load and become the electrical generator operating mode, its torque and gravitational torque are contended with, guarantee the controlled steady decline of weight, produced electric current be transformed into heat energy in the resistance in circuit, and be dispersed in the surrounding environment, lot of energy has run off like this in vain.
Not long ago, all kinds of gantry cranes, the track of mains supply hang with bridge crane in, electric energy that weight potential energy is converted in the decline process has appearred, feed back to the energy saver of supply network after treatment, but, temporarily also generally promoted because of the problem of aspects such as cost of investment.
Operate in the elevator machineries such as a large amount of tire cranes of goods yard, because of the often conversion of operation ground, inconvenience links to each other with electrical network, and its power machine often is a diesel engine, and their transfer of energy pattern is: diesel engine-generator-motor-drop-gear box-rope drum-lifting weight.The electrical power storage that has occurred recently the weight potential energy converting and energy is become is in the novel high-capacity lithium cell group of super capacitor or energy fast charging and discharging.In lifting process, this part electric energy is discharged assist to promote electrical motor work again, thereby reduce diesel engine--the load of electrical generator, energy-conservation to realize.But, make their application also be subjected to bigger restriction because present super capacitor and high-capacity lithium battery still are further improved at aspects such as economy, technology and life-spans.
The utility model content:
The utility model hydraulic energy saving system for harbour crane is all kinds of harbour cranes tire crane particularly, the technical scheme of the potential energy recycling when providing a kind of new weight to descend.It is made every effort to simple, practical and ripe hydraulic efficiency pressure system, realizes that the weight potential energy that reclaims automatically when descending also stores, when being used to promote weight automatically and electrical motor the lifting torque is provided jointly, to reach purpose of energy saving.
The utility model is achieved through the following technical solutions.The original working process of tire crane is that power machine diesel engine 1 drive electrical generator 2 removes driving motor 3, and the torque of electrical motor 3 drives rope drum 7 and promotes weights 6 after drop-gear box 5 amplifies.This hydraulic energy saving system for harbour crane is that several gear pairs K is installed in parallel connection additional around the input shaft (speed end) of the drop-gear box 5 of crane, with speed or after speed change, drive coupled variable piston oil pump and hydraulic efficiency pressure system unit thereof separately, be combined into the hydraulic energy-saving system of harbour crane.The connection mode of this hydraulic efficiency pressure system unit is: lamina membranacea piston sealed reservoir 8 oil outlets link to each other with the import of variable piston oil pump 11 through ball valve 9, check valve 10, the outlet of variable piston oil pump 11 has three parallel branches, to oil return line, the control mouth of this by pass valve 15 links to each other with oil return through two two energisings of little latus rectum magnetic change-over valve 19 first via through pilot overflow valve 15; The second the tunnel leads to energy storage 23 by hydraulic control one-way valve 17, and bypass is provided with pressure tap 18; Third Road divides two-way again behind little latus rectum check valve 20, one the tunnel behind fixed restrictor 22, control mouth to hydraulic control one-way valve 17, another Lu Jingxiao latus rectum two-bit triplet electromagnetic ball valve 21 leads to energy storage 23, another outlet of commutation ball valve 21 links to each other with oil return, during 11 one-tenth oil motor operating modes of variable piston oil pump, the oil return of oil motor 11 outlets is got back to lamina membranacea piston sealed reservoir 8 through filter 13, check valve 12.
In weight decline process, automatically the potential energy that should have the discard pressure that changes fluid into can and store, when weight need promote, automatically it is discharged and promote oil pump 11 (being the oil motor operating mode this moment), torque is reached the input shaft of drop-gear box 5 by gear pair K, assist electrical motor 3 to drive rope drum 7 and overcome the work done of gravity lifting weight, make the potential energy before weight descends obtain to utilize.Because of the hoisting capacity rangeability of harbour crane is bigger, the weight that sheds the suspender frame behind the weight only is the part of maximum loading, for the potential energy that adapts to different loadings reclaims, so should dispose several these hydraulic efficiency pressure system unit on a crane.They be configured in drop-gear box 5 input shaft around and corresponding gear pair K distribute radially together, but these unit can be all, also subparticipation work.The maximum working pressure (safe pressure) of by pass valve 15 decision systems, whether by pass valve 15 controls off-loads by two two energisings of little latus rectum magnetic change-over valve 19, when change-over valve 19 dead electricity, this valve communicates the remote control mouth of by pass valve 15 with oil return, pilot overflow valve 15 is in unloading condition, and this hydraulic efficiency pressure system unit is in off working state.
The output discharge capacity q of variable capacity oil pump 11, the output signal control of controlled device 14, the incoming signal of controller 14 comprises input shaft rotating speed ω (being measured by speed gage 4), the energy storage pressure p of weight weight G, change speed gear box 5 and the external command ZL of crane operator etc., behind the sequential operation of via controller by setting, export the discharge capacity q of corresponding signal control variable capacity oil pump 11.The torque M of oil pump 11 is that the discharge capacity q with oil pump 11 is directly proportional (M ∝ q's * p) with the product of delivery pressure (being the pressure p of energy storage).Desire to make the controlled steady decline of weight, the input torque of oil pump 11 should balance each other with the torque of weight 6 on the rope drum 7, this just must keep the relatively stable of oil pump 11 input torques, the pressure p of energy storage 23 changes from low to high in the accumulation of energy process, and the discharge capacity q of variable capacity oil pump 11 also should be from large to small corresponding thereupon.Adopt controller automatically controlled variable capacity oil pump, except can make crane operation convenient, reliable, to hinder little heating few because of liquid in the hydraulic circuit, can save cooling mechanism.Cut off the outlet of fuel tank when ball valve 9 is used to overhaul, check valve 10 and 12 effect are that the fuel-displaced and oil return of fuel tank is separated, and make oil return must pass through filter 13, with the cleaning of maintenance fluid.
Description of drawings:
Fig. 1: tire crane hydraulic energy-saving system (common valve) unit schematic diagram
Fig. 2: tire crane hydraulic energy-saving system (inserted valve) unit schematic diagram
The specific embodiment: the existing accompanying drawings specific embodiment of the present utility model, see Fig. 1.The original working process of tire crane is that power machine diesel engine 1 drive electrical generator 2 removes driving motor 3, and the torque of electrical motor 3 is rotated rope drum 7 and promoted weights 6 after drop-gear box 5 amplifies.This hydraulic energy saving system for harbour crane is to be installed in parallel several gear pairs K around the input shaft (speed end) of the drop-gear box 5 of crane, as A among Fig. 1 to shown in, with speed or after speed change, drive coupled variable piston oil pump and hydraulic efficiency pressure system unit thereof separately, the pressure that the potential energy that automatically should have discard in weight decline process changes fluid into can and store, automatically it is discharged when weight need promote and promote oil pump 11 (being the oil motor operating mode this moment), torque is reached the input shaft of drop-gear box 5 by gear pair K, assist electrical motor 3 to drive rope drum 7 and overcome the work done of gravity lifting weight, make the potential energy before weight descends obtain to utilize.Because of the hoisting capacity rangeability of harbour crane bigger, the suspender weight that sheds behind the weight only is the part of maximum loading, for the recovery of the potential energy that adapts to different loadings, on a crane, should dispose several this hydraulic efficiency pressure system unit, these unit can be all, also can partly work.It as hoisting capacity (containing suspender frame etc.) 60 tons tire crane, configurable four groups is the hydraulic efficiency pressure system unit of core with A7V0 variable piston oil pump, be arranged in radially drop-gear box 5 input shaft around, as A among Fig. 1 to shown in, link by associated separately gear pair K and input shaft respectively, be divided into: unloaded (suspender is only arranged), 15-30 ton, 30-45 ton, four weight class of 45-60 ton according to weight of heavy.Controller 14 makes them respectively to there being 1-4 unit to enter mode of operation.In each weight class, determine the flowrate variation scope of controllable capacity pump according to actual weight automatically by controller again, to produce the torque that adapts with weight gravity.
Weight decline accumulation of energy process, when the driver control crane descends weight 6, rope drum 7 is delivered to input shaft with the weight gravitational torque by drop-gear box 5, driving separately through gear pair K, the oil pump 11 of unit rotates, oil in the lamina membranacea piston sealed reservoir 8, the ball valve 9 through opening and the oil inlet of check valve 10 entering variable oil pumps 11, two two energisings of little latus rectum in this hydraulic pressure unit magnetic change-over valve 19 is charged, then this unit enters mode of operation (as if not charged, then pilot overflow valve 15 is in unloading condition, this unit is in the idle loop operating mode of inoperative), this moment is low because of energy storage 23 internal pressures, so variable capacity oil pump should be discharged by the big discharge capacity that controller is set, to reach the required load torque that contends with gravitational torque, pressure oil backs down hydraulic control one-way valve 17 and enters energy storage 23 at this moment, along with weight descends, energy storage 23 internal pressures raise, via controller feeds back to the stroking mechanism of pump, make the minimizing that is inversely proportional to of controllable capacity pump flow, with the load torque that keeps relative stability, the control weight descends reposefully, and the pressure that the weight potential energy that automatically should have discard changes fluid into can and store.When potential energy is bigger, when energy storage 23 capacity were not enough, surplus oil liquid backed down pilot overflow valve 15, at high pressure conditions underflow stream oil sump tank, continued to keep corresponding load torque.In this process, promote electrical motor (electrical generator) 3 and can be the no-load idling conditions.If weight stops to descend midway, the brake system of former crane can make weight hover, the oil pump stall, and the accumulation of energy process is also suspended.
Weight promotes exergonic process, when the driver control crane promotes weight 6, promote electrical motor 3 by the rotary speed working of setting, the lifting that overcomes gravity torque is provided, weight is risen by certain speed, contain the little latus rectum two-bit triplet electromagnetic ball valve 21 charged commutations in the hydraulic efficiency pressure system unit of energy this moment in the energy storage 23, pressure oil in the energy storage 23 is through commutation ball valve 21, one the road arrives the reverse outlet of hydraulic control one-way valve 17 earlier through check valve 20, improving this locates to the oil circuit pressure of oil motor 11 inlets, thereby reduce advancing of hydraulic control one-way valve 17, outlet pressure reduction, the hydraulic efficiency impact when opening suddenly to eliminate this valve; Another road lags behind through fixed restrictor 22 and arrives the control mouth of hydraulic control one-way valve 17, open hydraulic control one-way valve 17, energy storage 23 inner high voltage oil discharge the inlet that enters oil motor 11 by hydraulic control one-way valve 17, drive oil motor 11 and torque is passed to the input shaft of drop-gear box 5 by gear pair K separately, overcome gravity lifting weight with the electrical motor 3 common rope drums 7 that drive, allow the weight potential energy that stored when last time weight descended obtain utilizing, thereby reduced the load of former crane power system, its energy-saving effect is conspicuous.If Halfway Stopping promotes weight, former crane brake system is hovered weight, the little latus rectum two-bit triplet electromagnetic ball valve 21 dead electricity commutation of each unit of native system, and the oil in the control mouth of hydraulic control one-way valve 17 arrives oil return line through commutation ball valve 21, hydraulic control one-way valve 17 returns are closed, and exergonic process is ended.If the energy storage self-energy of certain unit has been put, commutation ball valve 21 and change-over valve 19 are power failure state in the lifting process, and this hydraulic efficiency pressure system unit is in the very little idle loop operating mode of consumed energy.
The hydraulic valve of native system can be chosen general-duty plate valve or tube valve or Sandwich plate valve and make up.Lamina membranacea piston sealed reservoir is the sealed reservoir (patent No.: ZL200720068995.0) of normal pressure (barometric pressure) work, its can be under the state of normal pressure fuel feeding big flow ground fluid of handling up, the long-term cleaning that keeps hydraulic system oil liquid has guaranteed the work life and the reliability of native system.
Because of the flow of tire crane hydraulic energy-saving system big, for reducing volume, cost-cutting, pile-up valve can select for use the inserted valve of suitable latus rectum to make up, Fig. 2 is the tire crane hydraulic energy-saving system unit schematic diagram that is combined into inserted valve, wherein only substituted the little latus rectum two-bit triplet electromagnetic ball valve 21 among Fig. 1 with two four-way electromagnetic reversing valves 24 of little latus rectum, the function complete class of the Hydraulic Elements of other parts together.
The utility model hydraulic energy saving system for harbour crane, also can adopt quantitative plunger pump and transfer to the combination of high-voltage priority valve etc., form the technical scheme of the hydraulic load torque that contends with the weight gravitational torque, the benefit of this scheme is that the specification of oil pump and energy storage can be less, and cost is low, small investment, but in the accumulation of energy process, pressure reduction between sequence valve and the energy storage has caused bigger heating and degradation of energy, and not only recuperated energy reduces, and need set up the cooling-cycle device of fluid.This is that the hydraulic pressure industry is known altogether, but root is drawn together actual conditions and selected it.
The utility model hydraulic energy saving system for harbour crane, in parallel with former crane machinery and electric system, it is convenient to be connected coupling, system is simple, practicality, small investment, long working life, is not only applicable to other all kinds of portal crane tools, also can apply to other department, in the lifting and jacking equipment as railway, highway, mine, building and enterprise etc., can save a large amount of energy, also reduce simultaneously, be beneficial to environmental protection to obtaining " three wastes " discharging that these energy cause.
Claims (1)
1. hydraulic energy saving system for harbour crane, it is characterized in that: several gear pairs (K) are installed in parallel connection additional around the input shaft of the drop-gear box (5) of crane, with speed or after speed change, drive coupled variable piston oil pump (11) and hydraulic efficiency pressure system unit thereof separately, be combined as the hydraulic energy-saving system of harbour crane, the connection mode of this hydraulic efficiency pressure system unit is: lamina membranacea piston sealed reservoir (8) oil outlet is through ball valve (9), check valve (10) links to each other with the import of variable piston oil pump (11), the outlet of variable piston oil pump (11) has three parallel branches, to oil return line, the control mouth of this by pass valve (15) links to each other with oil return through little latus rectum two two energisings magnetic change-over valve (19) first via through pilot overflow valve (15); The second the tunnel leads to energy storage (23) by hydraulic control one-way valve (17), and bypass is provided with pressure tap (18); Third Road divides two-way again behind little latus rectum check valve (20), one the tunnel behind fixed restrictor (22), control mouth to hydraulic control one-way valve (17), another Lu Jingxiao latus rectum two-bit triplet electromagnetic ball valve (21) leads to energy storage (23), another outlet of commutation ball valve (21) links to each other with oil return, when variable piston oil pump (11) became the oil motor operating mode, the oil return of oil motor (11) outlet was got back to lamina membranacea piston sealed reservoir (8) through filter (13), check valve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200762226U CN202007082U (en) | 2009-06-15 | 2009-06-15 | Hydraulic energy-saving system of port crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200762226U CN202007082U (en) | 2009-06-15 | 2009-06-15 | Hydraulic energy-saving system of port crane |
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| Publication Number | Publication Date |
|---|---|
| CN202007082U true CN202007082U (en) | 2011-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009200762226U Expired - Fee Related CN202007082U (en) | 2009-06-15 | 2009-06-15 | Hydraulic energy-saving system of port crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314884A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Hydraulic fine adjustment system |
| US9316238B2 (en) | 2011-11-21 | 2016-04-19 | Konecranes Global Corporation | Apparatus, method and computer program product for moving cargo, and a kit and method for upgrading an apparatus for moving cargo |
-
2009
- 2009-06-15 CN CN2009200762226U patent/CN202007082U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9316238B2 (en) | 2011-11-21 | 2016-04-19 | Konecranes Global Corporation | Apparatus, method and computer program product for moving cargo, and a kit and method for upgrading an apparatus for moving cargo |
| CN104314884A (en) * | 2013-09-11 | 2015-01-28 | 昆山新金福精密电子有限公司 | Hydraulic fine adjustment system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20130615 |