CN102734055A - Oil cylinder driven power set - Google Patents
Oil cylinder driven power set Download PDFInfo
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- CN102734055A CN102734055A CN201210209666.9A CN201210209666A CN102734055A CN 102734055 A CN102734055 A CN 102734055A CN 201210209666 A CN201210209666 A CN 201210209666A CN 102734055 A CN102734055 A CN 102734055A
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Abstract
The invention brings forward an oil cylinder driven power set, which comprises at least one hydraulic cylinder, a crankshaft and a fixed part. wherein the hydraulic cylinder comprises a cylinder, a piston and a piston rod. The cylinder is swingably arranged on the fixed part. The piston is fixedly connected with a first end of the piston rod. The crankshaft comprises a main journal and a rod journal, wherein the main journal is arranged on the fixed part; a second end of the piston rod is arranged on the rod journal, and the integral body forms a crank link mechanism to convert straight reciprocating motion of the piston rod into rotary movement of the crankshaft. According to the invention, the crankshaft is driven through hydraulic pressure to output rotary movement. The oil cylinder driven power set has advantages of large output torque, stationary operation, no offset load and overall stroke operation, is convenient to control, has a simple structure, is easy to implement, and is especially suitable for low-speed and large-torque application environment.
Description
Technical field
The present invention relates generally to power system and Hydraulic Field, specifically, relates to a kind of power plant of hydraulic oil cylinder driving, particularly a kind of power plant of exporting high pulling torque.
Background technique
In the power plant that DENG, petrol engine etc. are used always, cylinder is the source that produces its driving force.Fuel through the transmission of connecting rod 12 ', bent axle 2 ', outputs power to corresponding power unit then in the piston 11 ' motion shown in the cylinder interior burning pusher cardon 1.Connecting rod 12 ' is the connected element that connects piston 11 ' and bent axle 2 '; In the working procedure; Connecting rod 12 ' little head end is reciprocating with piston 11 '; Connecting rod 12 ' stub end rotates with the axis of rod journal around bent axle 2 ', and the shaft between connecting rod 12 ' CONCENTRIC REDUCER is done complicated oscillating motion.In this process, the cylinder sleeve 10 ' of cylinder is in stationary state all the time, when the shaft of connecting rod 12 carries out oscillating motion, can apply unbalance loading to fixing cylinder sleeve 10 ', and this unbalance loading can produce lateral force.As shown in Figure 1, shaft can apply skew force F ' to piston 11 ' and cylinder sleeve 10 ', thereby increases the friction of piston 11 ' and cylinder sleeve 10 ', and the tired and wearing and tearing of aggravation piston 11 ' and cylinder sleeve 10 ' reduce its working life and reliability.
As everyone knows, the work cycle of aforementioned power plant is made up of air inlet, compression, burning expansion, four processes of exhaust, and this work cycle both can realize through two strokes of piston 11 ', also can realize through the four-stroke of piston 11 '.With the four stroke engine is example; Only make piston 11 ' when top dead center is pushed into the stroke of lower dead center in oil inflame; Piston 11 ' is externally acting, and the motion of piston 11 ' then need rely on the inertial force of bent axle 2 ' to drive in other three strokes, not externally acting.Because be not full stroke acting, therefore peak output and the moment of torsion to motor caused restriction.
In working environments such as engineering machinery, mining machinery, petroleum machinery and marine machinery, require the enough moments of torsion of power plant output to drive corresponding power unit.Development along with equipment enlarging, heavy loading; Moment of torsion and power to power plant output have proposed bigger requirement; Traditional power plant often need be equipped with large-sized gear drive just can realize high pulling torque output, and that this scheme has is bulky, consumptive material is many, from significant disadvantages such as great.As another kind of replacement scheme; In order to export high pulling torque; Also adopt the fax braking technique in the existing technology, promptly through the engine drives generator, the electricity that sends with generator is then supplied with motor; Thereby the output shaft of motor connects the output that speed reducer is realized high pulling torque, and this system has complex structure, control difficulty, shortcomings such as volume weight is big, capacity usage ratio is low, manufacture cost height.
Along with the requirement of machinery to output torque constantly increases, also more and more to the manufacturing requirement of power plant.Therefore, how to provide that a kind of unbalance loading is little, reliability is high, compact structure, be easy to control, power plant with low cost, the performance requirement that maximize to satisfy, heavy-duty equipment constantly promotes is the technical problem that those skilled in the art need to be resolved hurrily.
Summary of the invention
The present invention aims to provide a kind of power plant of hydraulic oil cylinder driving, and these power plant can directly be exported high pulling torque, and can eliminate the unbalance loading of piston motion, improves the stability of piston motion.
The power plant of hydraulic oil cylinder driving of the present invention comprise at least one hydraulic jack, bent axle and fixed component, wherein:
Said hydraulic jack comprises cylinder barrel, piston and piston rod, and said cylinder barrel is arranged on the said fixed component swingably, and said piston is fixedly connected with first end of said piston rod;
Said bent axle comprises main journal and rod journal; Said main journal is arranged on the said fixed component; Second end of said piston rod is arranged on the said rod journal the whole connecting rod that forms, and converts the straight reciprocating motion of said piston rod to said bent axle rotatablely move.
Further, said bent axle comprises a plurality of rod journals, and second end of the piston rod of a plurality of hydraulic jacks is arranged on the corresponding rod journal.
Further, said hydraulic jack is arranged in a row, and forms in-line arrangement.
Further, said hydraulic jack is divided into two groups, and each is organized hydraulic jack and is arranged in a row, and is at an angle to each other between the two discharge opeing compressing cylinders, forms " V " font structure.
Further, said hydraulic jack is divided into two groups, and each is organized hydraulic jack and is arranged in a row, and the angle between the two discharge opeing compressing cylinders is 180 °, forms the flat opposed structure.
Further; Said hydraulic jack is divided into four groups; Each is organized hydraulic jack and lines up the first, second, third and the 4th row, and the first and the 3rd discharge opeing compressing cylinder forms first " V " font structure, and the second and the 4th discharge opeing compressing cylinder forms second " V " font structure.
Further, be that the axle center constitutes the cylndrical surface with the axis of said bent axle, said hydraulic jack is distributed in the different radial positions of said cylndrical surface, forms star structure.
Further, said hydraulic jack is a two-way cylinder, and its rod chamber and rodless cavity replace oil inlet and oil return, when said piston rod stretches out, and said rodless cavity oil-feed, rod chamber oil return; When said piston rod is withdrawn, said rod chamber oil-feed, rodless cavity oil return.
Further, said hydraulic jack is an one-way cylinder, and its rodless cavity oil inlet and oil return is only arranged, when said piston rod stretches out, and said rodless cavity oil-feed; When said piston rod is withdrawn, said rodless cavity oil return.
Further, also comprise first solenoid directional control valve, pressure transducer and first controller, wherein:
Said first solenoid directional control valve is used to control the oil inlet and oil return direction of said hydraulic jack;
Said pressure transducer is arranged at the rod chamber and/or the rodless cavity of said hydraulic jack, the hydraulic fluid pressure when being used to detect piston motion to relevant position;
Said first controller connects said first solenoid directional control valve and said pressure transducer, and according to the pressure signal of said pressure transducer, controls said first solenoid directional control valve switching-over.
Further; Said first solenoid directional control valve is two-position four way change valve or the three position four-way directional control valve that comprises first actuator port, second actuator port, first filler opening and first return opening; Said first actuator port and second actuator port are connected the rod chamber and the rodless cavity of said hydraulic jack respectively; Said first filler opening connects oil hydraulic pump, and said first return opening connects fuel tank.
Further; Said first solenoid directional control valve is a two position three way directional control valve; Said two position three way directional control valve comprises the 3rd actuator port, second filler opening and second return opening; Said the 3rd actuator port connects the rodless cavity of said hydraulic jack, and said second filler opening connects oil hydraulic pump, and said second return opening connects fuel tank.
Further, also comprise mechanical switching valve, cam, first rod member and second rod member, wherein:
Said mechanical switching valve is provided with control end;
Said cam connects the main journal of said bent axle, and rotates accordingly with said main journal;
First end of said first rod member is arranged on the side face of said cam and under said cam action, moves back and forth;
Said second rod member is provided with respect to said fixed component swingably, and first end of said second rod member connects the control end of said mechanical switching valve, and second end of said second rod member connects second end of said first rod member.
Further, also comprise second solenoid directional control valve, angular displacement sensor and second controller, wherein:
Said second solenoid directional control valve is used to control the oil inlet and oil return direction of said hydraulic jack;
Said angular displacement sensor is used to detect the angular displacement of said crankshaft rotating motion;
Said second controller connects said second solenoid directional control valve and said angular displacement sensor, and according to the angular displacement signal of said angular displacement sensor, controls said second solenoid directional control valve switching-over.
Further, the end of the cylinder barrel of said hydraulic jack is provided with hinged seat, and said hydraulic jack is articulated on the said fixed component through said hinged seat.
Further, the outer wall of the cylinder barrel of said hydraulic jack is symmetrically arranged with two groups of ear seats, and said hydraulic jack is articulated on the said fixed component through said ear seat.
Further, said power plant also comprise flywheel and/or equilibrium block, and wherein said flywheel is arranged on the main journal of said bent axle, and said equilibrium block is a weight member, is used for the balance crankshaft center of gravity.
Further, in the said hydraulic jack working procedure, part hydraulic jack cylinder deactivation, only other a part of hydraulic jack does work to bent axle.
Form connecting rod between the piston rod of the power plant of hydraulic oil cylinder driving of the present invention and the bent axle, the output that drives bent axle and realized rotatablely moving through hydraulic coupling.Compared with prior art, driving force of the present invention is big, can export very big moment of torsion, is particularly useful for the applied environment of low-speed big; In addition, hydraulic jack of the present invention is two power bar structures on the whole, has eliminated lateral force, has improved force-bearing situation, has promoted the bent axle traveling comfort.
For two-way cylinder of the present invention; In piston each stroke from the top dead center to the lower dead center and from the lower dead center to the top dead center, except that the dead point, piston all can externally do work under the driving of hydraulic coupling; Therefore the efficient of bent axle operation be can promote, output power and output torque improved.
And the present invention can also advanced by reference computer technology realize the concerted action control of hydraulic jack, thereby improves the control performance of device, guarantees the good operation of system.In addition; The present invention need not be provided with structures such as complicated cooling system, air inlet system and exhaust system, cam gas distribution system as diesel oil, petrol engine equal power device yet; As long as form hydraulic system, has simple in structure, easy to implement, compact structure, an advantage significantly such as volume is little, in light weight, applicability is wide through oil hydraulic pump and hydraulic pipe line etc.
Description of drawings
Fig. 1 is the stressed schematic diagram of the power plant of existing technology;
Fig. 2 is the structure principle chart of the power plant of one embodiment of the invention;
Fig. 3 is the stressed schematic diagram of power plant embodiment illustrated in fig. 2;
Fig. 4 is the structure principle chart of the in-line arrangement power plant of one embodiment of the invention;
Fig. 5 is the structure principle chart of another embodiment of the present invention " V " font power plant;
Fig. 6 is the hydraulic schematic diagram of the power plant of one embodiment of the invention;
Fig. 7 is the hydraulic schematic diagram of the power plant of another embodiment of the present invention;
Fig. 8 is the hydraulic schematic diagram of the power plant of further embodiment of this invention;
Fig. 9 is the hydraulic schematic diagram of the power plant of further embodiment of this invention.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with accompanying drawing and embodiment.
Set forth a lot of details in the following description so that make much of the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following disclosed specific embodiment.
Shown in Figure 2 is the structure principle chart of the power plant of one embodiment of the invention.As can be seen from the figure, the power plant of hydraulic oil cylinder driving of the present invention comprise at least one hydraulic jack 1 and bent axle 2, and comprise the fixed component s that is used to install said hydraulic jack 1 and bent axle 2.This fixed component s constitutes the skeleton of the power plant of hydraulic oil cylinder driving of the present invention, plays the effect of supporting and other parts being installed, and it can be structure members such as body or housing.Fixed component s of the present invention both can refer to independent parts, also can refer to a plurality of independences or various parts, as long as it fixedly installs the definition that promptly meets fixed component s of the present invention.
The cylinder barrel 10 of hydraulic jack 1 is provided with respect to fixed component s swing, as a kind of mode of execution, can be provided with hinged seat (with reference to figure 5) in the end of cylinder barrel 10, and hydraulic jack 1 is articulated on the fixed component s through hinged seat; As another kind of mode of execution, can be symmetrically arranged with two groups of ear seats (with reference to figure 4) at the outer wall of cylinder barrel 10, hydraulic jack 1 is articulated on the fixed component s through the ear seat.
What be worth explanation is, compares with the power plant of existing technology, and cylinder barrel 10 of the present invention is not to fixedly install, and hydraulic jack 1 is two power bar structures on the whole, therefore can avoid the formation of lateral force, has eliminated unbalance loading, has improved force-bearing situation.In addition, be not to flexibly connect between first end of piston 11 of the present invention and piston rod 12, but be fixedly connected, greatly improved the reliability of piston 11 with piston rod 12 motions through wrist pin.
Bent axle 2 of the present invention comprises main journal shown in Figure 2 21 and rod journal 22; Main journal 21 is arranged on the fixed component s; Second end of piston rod 12 is arranged on the rod journal 22, and the whole connecting rod that forms converts the straight reciprocating motion of piston rod 12 to bent axle 2 rotatablely move.
The main journal 21 of bent axle 2 is positioned at the position at crankshaft center line place, has certain eccentric distance between rod journal 22 and this axis.Bent axle 2 is that the center is rotated motion with main journal 21 axis.Bent axle 2 generally selects for use intensity height, shock-resistant toughness and good high-quality medium carbon structure steel, high-quality medium carbon alloy steel or the high-strength ductile cast iron of wear-resisting property to forge or cast.
Preferably, bent axle 2 comprises a plurality of rod journals 22, and second end of the piston rod 12 of hydraulic jack 1 is arranged on the corresponding rod journal 22.In the embodiment shown in Figure 2, hydraulic jack 1 comprises 4, should be understood that, it can be other quantity also, and the present invention is not limited to this.
Further, in view of the nonuniformity of bent axle 2 rotations, the present invention also is provided with flywheel shown in Figure 23 on the main journal 21 of bent axle 2.Flywheel 3 can be disc-shaped structure.This flywheel 3 can store the kinergety in bent axle 2 movement processes, and it has bigger rotary inertia, and when bent axle 2 rotating speeds increased, the kinetic energy of flywheel 3 increased, and can energy storage be got up; When bent axle 2 rotating speeds reduced, the kinetic energy of flywheel 3 reduced, and can energy be discharged.Flywheel 3 can reduce the speed fluctuation in the operation process, is convenient to drive bent axle 2 smooth operations.
The present invention can also be provided with equilibrium block on bent axle 2, equilibrium block is a weight member, is used for balance crankshaft 2 centers of gravity.This equilibrium block can guarantee the balance of bent axle 2, reduces the vibration of bent axle 2 operations.This equilibrium block is arranged at the opposite side that bent axle 2 is laid particular stress on part.Should be understood that, can also on bent axle 2, bore and go a part of weight, to reach the purpose of balance.
Connecting rod is the power transmission mechanism of the power plant of hydraulic oil cylinder driving of the present invention, and its linear type to-and-fro motion with piston rod 12 converts rotatablely moving of bent axle 2 into, and external outputting power.Mention that in preamble for four stroke engine, when having only the stroke of burning expansion, piston 11 ' is externally acting, just does work once when promptly bent axle 2 ' changes 720 ° (two weeks).Highlightedly, the present invention is for two-way cylinder, and except the dead point, piston 11 all can externally do work under the driving of hydraulic coupling, has realized full stroke acting, has significantly improved output power and output torque; Even for one-way cylinder, bent axle 2 revolutions also can do work once when 360 ° (weeks), had improved the efficient of bent axle 2 operations.
As one embodiment of the present of invention, in hydraulic jack 1 working procedure, part hydraulic jack 1 cylinder deactivation, 2 actings of 1 pair of bent axle of only other a part of hydraulic jack.On the basis of technique scheme; Can be according to the operation and the load state of power unit; Only control section hydraulic jack 1 externally does work; And the part hydraulic jack 1 of cylinder deactivation does not externally do work (its piston rod moves under the drive of bent axle), thereby can adjust the output power of the power plant of hydraulic oil cylinder driving of the present invention, improves capacity usage ratio.
Fig. 3 is the stressed schematic diagram of power plant embodiment illustrated in fig. 2.Flexibly connect owing to adopt between the cylinder barrel 10 of hydraulic jack 1 of the present invention and the fixed component s, and the rod journal 22 of second end of piston rod 12 and bent axle 2 also adopts flexible connection, hydraulic jack 1 is two power bar structures on the whole; The stressed axial direction in its two ends along hydraulic jack 1; Can not bend and torsional deformation, guarantee the balance of hydraulic jack 1 integral body, eliminate lateral force; Improve force-bearing situation, promoted bent axle 2 traveling comforts.
When hydraulic jack 1 when being a plurality of, each hydraulic jack 1 can have multiple arranged mode on bent axle 2.Fig. 4 is the structure principle chart of the in-line arrangement power plant of one embodiment of the invention, and each hydraulic jack 1 is arranged in a row in the figure, forms in-line arrangement.Each hydraulic jack 1 can as shown in Figure 4ly vertically be arranged in a row, and in order to reduce height, also that can be arranged to tilt even structure level has advantages such as volume compact, layout be flexible.
As another embodiment of the present invention, as shown in Figure 5, hydraulic jack 1 is divided into two groups; Each is organized hydraulic jack 1 and is arranged in a row; At an angle to each other between the two discharge opeing compressing cylinders 1, form " V " font structure, this structure can reduce the whole body length and the height of the power plant of hydraulic oil cylinder driving of the present invention; And the angled subtend layout of oil cylinder, can offset part vibration.The angle of aforementioned " V " font structure can be 60 ° or other angle.
In addition, on the basis of aforementioned " V " font structure, can also be 180 ° with the angular adjustment between the two discharge opeing compressing cylinders 1, form the flat opposed structure.Since flat opposed between adjacent two hydraulic jacks 1, the vibration of can cancelling out each other, thus make that bent axle 2 runnings are more steady.
As another embodiment of the present invention; Can also hydraulic jack 1 be divided into four groups; Each is organized hydraulic jack 1 and lines up the first, second, third and the 4th row, and the first and the 3rd discharge opeing compressing cylinder 1 forms first " V " font structure, and the second and the 4th discharge opeing compressing cylinder 1 forms second " V " font structure; Hydraulic jack 1 can form approximate " W " font on the whole and arrange, thereby can shorten crankshaft length, saving overall space.
In addition, as another arrangement mode, can be that the axle center constitutes the cylndrical surface with the axis of bent axle 2, hydraulic jack 1 is distributed in the different radial positions of said cylndrical surface, forms star structure.For example when hydraulic jack 1 is 5, can form the structure that is projected as similar five-pointed star.Should be understood that each hydraulic jack both can have identical axial position on bent axle 2, also can be different axial positions.
Need to prove, when the present invention is a plurality of at hydraulic jack 1, need work compound between the hydraulic jack 1 each other, can guarantee the conformity of bent axle 2 motions.The turnover oil action of each hydraulic jack 1 can also can be adopted mechanical structure control through electronic control technology control, and the present invention is not limited to this.
In the embodiment shown in fig. 6, hydraulic jack 1 is a two-way cylinder, and its rod chamber and rodless cavity replace oil inlet and oil return, and when piston rod 12 stretches out, rodless cavity oil-feed, rod chamber oil return; When piston rod 12 withdrawals, rod chamber oil-feed, rodless cavity oil return.In addition, the in-line arrangement that is arranged in a row for a plurality of hydraulic jacks 1 shown in Figure 6.The action of hydraulic jack 1 can be controlled through the system that comprises first solenoid directional control valve 41, pressure transducer 5 and first controller 61.
First solenoid directional control valve 41 is used to control the oil inlet and oil return direction of hydraulic jack 1, and it both can control a hydraulic jack, also can control a plurality of hydraulic jacks (wherein two hydraulic jacks identical like potential difference) simultaneously.Preferred first solenoid directional control valve 41 is identical with the quantity of hydraulic jack 1.In two-way cylinder shown in Figure 6, this first solenoid directional control valve 41 is a three position four-way directional control valve, and comprises first actuator port, second actuator port, first filler opening and first return opening.Wherein, first actuator port and second actuator port are connected the rod chamber and the rodless cavity of hydraulic jack 1 respectively, and first filler opening connects oil hydraulic pump 40, the first return openings and connects fuel tank.At first state, the first actuator port oil-feed, the second actuator port oil return; At second state, the first actuator port oil return, the second actuator port oil-feed; In the third state, first actuator port and second actuator port are cut-off state.Should be understood that, be two-position four way change valve when (comprising same hydraulic fluid port), can realize technique effect of the present invention equally at this first solenoid directional control valve 41.
In the embodiment shown in fig. 7, hydraulic jack 1 is an one-way cylinder, and its rodless cavity oil inlet and oil return is only arranged, when piston rod 12 stretches out, and the rodless cavity oil-feed; During piston rod 12 withdrawals, the rodless cavity oil return.In addition, the in-line arrangement that is arranged in a row for a plurality of hydraulic jacks 1 shown in Figure 7.Hydraulic jack 1 can be controlled through the system that comprises first solenoid directional control valve 41, pressure transducer 5 and first controller 61.
In one-way cylinder shown in Figure 7, this first solenoid directional control valve 41 is a two position three way directional control valve, comprises the 3rd actuator port, second filler opening and second return opening.The 3rd actuator port connects the rodless cavity of hydraulic jack 1, and second filler opening connects oil hydraulic pump 40, the second return openings and connects fuel tank.At first state, hydraulic oil gets into the rodless cavity of hydraulic jack 1 through second filler opening and the 3rd actuator port; At second state, hydraulic oil returns into fuel tank through the 3rd actuator port and second return opening.
The pressure transducer 5 of Fig. 7 only is arranged at the rodless cavity of hydraulic jack 1, and its structure is similar with Fig. 6 with effect, and the structure of first controller 61 is similar with Fig. 6 with effect in addition, and this paper repeats no more at this.
Fig. 8 is the hydraulic schematic diagram of the power plant of further embodiment of this invention, and it controls the action of hydraulic jack 1 through the system that comprises second solenoid directional control valve 42, angular displacement sensor 8 and second controller 62.Wherein, second solenoid directional control valve 42 is used to control the oil inlet and oil return direction of hydraulic jack 1, and it both can control a hydraulic jack, also can control a plurality of hydraulic jacks (wherein two hydraulic jacks identical like potential difference) simultaneously.Preferred second solenoid directional control valve 42 is identical with the quantity of hydraulic jack 1.Angular displacement sensor 8 is used to detect the angular displacement that bent axle 2 rotatablely moves; Second controller 62 connects second solenoid directional control valve 42 and angular displacement sensor 8, and according to the angular displacement signal of angular displacement sensor 8, controls 42 switching-overs of second solenoid directional control valve.
Because hydraulic jack 1 after installation on the rod journal 22 of bent axle 2, has fixing angular dependence between each hydraulic jack 1, thereby can accurately control the location of hydraulic jack 1 top dead center and lower dead center according to angle measurement.This angular displacement sensor 8 can be the encoder that is arranged on the main journal 21 of bent axle 2.
Fig. 9 is the hydraulic schematic diagram of the power plant of further embodiment of this invention; Different with the computer technology that adopts among the earlier figures 6-8; What Fig. 9 adopted is a kind of structure of machinery control, and hydraulic jack 1 can be controlled through the system that comprises mechanical switching valve 43, cam 20, first rod member 71 and second rod member 72.Mechanical switching valve 43 both can have been controlled a hydraulic jack, also can control a plurality of hydraulic jacks (wherein two hydraulic jacks identical like potential difference) simultaneously.Preferred mechanical formula selector valve 43 is identical with the quantity of hydraulic jack 1.
Wherein, mechanical switching valve 43 is provided with control end 43a.This control end 43a can be the valve rod that is connected with spool, and this valve rod can be positioned at the end of mechanical switching valve 43.When this control end 43a was positioned at diverse location with respect to valve body, mechanical switching valve 43 had different commutation states.
First end of first rod member 71 is arranged on the side face of cam 20 and under cam 20 effects and moves back and forth, and first rod member 71 can be sleeved in the sleeve, moves radially to limit it.
In orientation shown in Figure 9; If bent axle 2 clockwise rotates, when piston rod 12 was descending, first rod member 71 moved down; Correspondingly driving second rod member 72 is the center counter-clockwise swing with the articulating point, and spurs the control end 43a of mechanical switching valve 43 left; When piston rod 12 came downwards to lower dead center, second rod member, 72 pulling selector valves were realized switching-over, and this moment, hydraulic oil oil inlet and oil return direction changed; Under the effect of hydraulic oil, piston rod 12 is up, and first rod member 71 moves up; Correspondingly second rod member 72 is swung clockwise; And promote the control end 43a of selector valve to the right, and go upward to atdc until piston rod 12, realize switching-over once more.So repeatedly, thus realize the linear type to-and-fro motion and bent axle 2 continuous rotary motion of piston rod 12.
In sum, the whole connecting rod that forms of the power plant of hydraulic oil cylinder driving of the present invention, the output that drives bent axle 2 and realized rotatablely moving through hydraulic coupling.Compared with prior art, the present invention mainly has the following advantages:
1) output torque is big
The present invention adopts hydraulic jack 1 to drive, and compares with diesel oil, petrol engine equal power device, and driving force is big, can export very big moment of torsion, is particularly useful for the applied environment of low-speed big.
2) operate steadily, do not have unbalance loading
Adopt between the cylinder barrel 10 of hydraulic jack 1 of the present invention and the fixed component s and flexibly connect; And the rod journal 22 of second end of piston rod 12 and bent axle 2 also adopts flexible connection; Hydraulic jack 1 is two power bar structures on the whole, can not produce in the existing technology and fix the unbalance loading that forms because of cylinder sleeve 10 ', has eliminated lateral force; Improve force-bearing situation, promoted bent axle 2 traveling comforts.In addition, on the bent axle 2 of the present invention flywheel 3 and balancer weight can also be set, further improve the balance quality of bent axle 2.
3) full stroke acting
For two-way cylinder; Its rod chamber and rodless cavity can replace oil inlet and oil return; In piston 11 each stroke from the top dead center to the lower dead center and from the lower dead center to the top dead center, except that the dead point, piston 11 all can externally do work under the driving of hydraulic coupling; Therefore the efficient of bent axle 2 operations be can promote, output power and output torque improved.
4) control is convenient
The present invention can advanced by reference computer technology realize the concerted action control to hydraulic jack of the present invention, can improve the control performance of device, guarantees the good operation of system.
5) simple in structure, easy to implement
Than diesel oil, petrol engine, the present invention need not be provided with structures such as complicated cooling system, air inlet system and exhaust system, cam gas distribution system, as long as form hydraulic system through oil hydraulic pump and hydraulic pipe line etc., has advantages such as simple in structure, easy to implement.
In addition, the power plant of hydraulic oil cylinder driving of the present invention than existing technology also have compact structure, significant advantage such as volume is little, in light weight, applicability is wide.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. the power plant of a hydraulic oil cylinder driving is characterized in that, comprise at least one hydraulic jack (1), bent axle (2) and fixed component (s), wherein:
Said hydraulic jack (1) comprises cylinder barrel (10), piston (11) and piston rod (12), and said cylinder barrel (10) is arranged on the said fixed component (s) swingably, and said piston (11) is fixedly connected with first end of said piston rod (12);
Said bent axle (2) comprises main journal (21) and rod journal (22); Said main journal (21) is arranged on the said fixed component (s); Second end of said piston rod (12) is arranged on the said rod journal (22); The whole connecting rod that forms converts the straight reciprocating motion of said piston rod (12) to said bent axle (2) rotatablely move.
2. power plant according to claim 1 is characterized in that, said bent axle (2) comprises a plurality of rod journals (22), and second end of the piston rod (12) of a plurality of hydraulic jacks (1) is arranged on the corresponding rod journal (22).
3. power plant according to claim 2 is characterized in that, said hydraulic jack (1) is arranged in a row, and form in-line arrangement.
4. power plant according to claim 2 is characterized in that, said hydraulic jack (1) is divided into two groups, and each is organized hydraulic jack (1) and is arranged in a row, and are at an angle to each other between the two discharge opeing compressing cylinders (1), form " V " font structure.
5. power plant according to claim 2 is characterized in that, said hydraulic jack (1) is divided into two groups, and each is organized hydraulic jack (1) and is arranged in a row, and the angle between the two discharge opeing compressing cylinders (1) is 180 °, form the flat opposed structure.
6. power plant according to claim 2; It is characterized in that; Said hydraulic jack (1) is divided into four groups; Each is organized hydraulic jack (1) and lines up the first, second, third and the 4th row, and the first and the 3rd discharge opeing compressing cylinder (1) forms first " V " font structure, and the second and the 4th discharge opeing compressing cylinder (1) forms second " V " font structure.
7. power plant according to claim 2 is characterized in that, are that the axle center constitutes the cylndrical surface with the axis of said bent axle (2), and said hydraulic jack (1) is distributed in the different radial positions of said cylndrical surface, forms star structure.
8. power plant according to claim 1 is characterized in that, said hydraulic jack (1) is a two-way cylinder, and its rod chamber and rodless cavity replace oil inlet and oil return, and said piston rod (12) is when stretching out, said rodless cavity oil-feed, rod chamber oil return; During said piston rod (12) withdrawal, said rod chamber oil-feed, rodless cavity oil return.
9. power plant according to claim 1 is characterized in that, said hydraulic jack (1) is an one-way cylinder, and its rodless cavity oil inlet and oil return is only arranged, and said piston rod (12) is when stretching out, said rodless cavity oil-feed; During said piston rod (12) withdrawal, said rodless cavity oil return.
10. power plant according to claim 1 is characterized in that, also comprise first solenoid directional control valve (41), pressure transducer (5) and first controller (61), wherein:
Said first solenoid directional control valve (41) is used to control the oil inlet and oil return direction of said hydraulic jack (1);
Said pressure transducer (5) is arranged at the rod chamber and/or the rodless cavity of said hydraulic jack (1), is used to detect the hydraulic fluid pressure of piston (11) when moving to the relevant position;
Said first controller (61) connects said first solenoid directional control valve (41) and said pressure transducer (5), and according to the pressure signal of said pressure transducer (5), controls said first solenoid directional control valve (41) and commutate.
11. power plant according to claim 10; It is characterized in that; Said first solenoid directional control valve (41) is two-position four way change valve or the three position four-way directional control valve that comprises first actuator port, second actuator port, first filler opening and first return opening; Said first actuator port and second actuator port are connected the rod chamber and the rodless cavity of said hydraulic jack (1) respectively, and said first filler opening connects oil hydraulic pump (40), and said first return opening connects fuel tank.
12. power plant according to claim 10; It is characterized in that; Said first solenoid directional control valve (41) is a two position three way directional control valve, and said two position three way directional control valve comprises the 3rd actuator port, second filler opening and second return opening, and said the 3rd actuator port connects the rodless cavity of said hydraulic jack (1); Said second filler opening connects oil hydraulic pump (40), and said second return opening connects fuel tank.
13. power plant according to claim 1 is characterized in that, also comprise mechanical switching valve (43), cam (20), first rod member (71) and second rod member (72), wherein:
Said mechanical switching valve (43) is provided with control end (43a);
Said cam (20) connects the main journal (21) of said bent axle (2), and rotates accordingly with said main journal (21);
First end of said first rod member (71) is arranged on the side face of said cam (20) and under said cam (20) effect and moves back and forth;
Said second rod member (72) is provided with respect to said fixed component (s) swingably; First end of said second rod member (72) connects the control end (43a) of said mechanical switching valve (43), and second end of said second rod member (72) connects second end of said first rod member (71).
14. power plant according to claim 1 is characterized in that, also comprise second solenoid directional control valve (42), angular displacement sensor (8) and second controller (62), wherein:
Said second solenoid directional control valve (42) is used to control the oil inlet and oil return direction of said hydraulic jack (1);
Said angular displacement sensor (8) is used to detect the angular displacement that said bent axle (2) rotatablely moves;
Said second controller (62) connects said second solenoid directional control valve (42) and said angular displacement sensor (8), and according to the angular displacement signal of said angular displacement sensor (8), controls said second solenoid directional control valve (42) and commutate.
15., it is characterized in that the end of the cylinder barrel (10) of said hydraulic jack (1) is provided with hinged seat according to each described power plant of claim 1-14, said hydraulic jack (1) is articulated on the said fixed component (s) through said hinged seat.
16. according to each described power plant of claim 1-14; It is characterized in that; The outer wall of the cylinder barrel (10) of said hydraulic jack (1) is symmetrically arranged with two groups of ear seats, and said hydraulic jack (1) is articulated on the said fixed component (s) through said ear seat.
17. according to each described power plant of claim 1-14; It is characterized in that, also comprise flywheel (3) and/or equilibrium block, wherein said flywheel (3) is arranged on the main journal (21) of said bent axle (2); Said equilibrium block is a weight member, is used for balance crankshaft (2) center of gravity.
18. according to each described power plant of claim 1-14, it is characterized in that, in said hydraulic jack (1) working procedure, part hydraulic jack (1) cylinder deactivation, only other a part of hydraulic jack (1) does work to bent axle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210209666.9A CN102734055A (en) | 2012-06-25 | 2012-06-25 | Oil cylinder driven power set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210209666.9A CN102734055A (en) | 2012-06-25 | 2012-06-25 | Oil cylinder driven power set |
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| Publication Number | Publication Date |
|---|---|
| CN102734055A true CN102734055A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210209666.9A Pending CN102734055A (en) | 2012-06-25 | 2012-06-25 | Oil cylinder driven power set |
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| Country | Link |
|---|---|
| CN (1) | CN102734055A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275733A (en) * | 2015-05-10 | 2016-01-27 | 大连海事大学 | Linear type piston rod hydraulic motor |
| CN106907447A (en) * | 2017-04-13 | 2017-06-30 | 三峡大学 | Convert rotational motion is the device of straight reciprocating motion |
| CN108435395A (en) * | 2018-02-07 | 2018-08-24 | 江苏大隆凯科技有限公司 | It saves the kind of drive of power and includes the broken line of the equipment using this mode |
| CN114135536A (en) * | 2021-09-30 | 2022-03-04 | 武汉船用机械有限责任公司 | Hydraulic oil cylinder |
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| CN114135536A (en) * | 2021-09-30 | 2022-03-04 | 武汉船用机械有限责任公司 | Hydraulic oil cylinder |
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Application publication date: 20121017 |