CN104358722A - Hydraulic control system for ocean engineering crane - Google Patents
Hydraulic control system for ocean engineering crane Download PDFInfo
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- CN104358722A CN104358722A CN201410627473.4A CN201410627473A CN104358722A CN 104358722 A CN104358722 A CN 104358722A CN 201410627473 A CN201410627473 A CN 201410627473A CN 104358722 A CN104358722 A CN 104358722A
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- hydraulic fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
- B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/52—Floating cranes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control system for an ocean engineering crane and belongs to the technical field of ocean engineering cranes. A main motor is connected with a main pump package; the oil outlet of the main pump package is communicated with the oil inlet of a reversing valve bank; the first oil outlet and the second oil outlet of the reversing valve bank are respectively communicated with two oil ports of a hydraulic motor through a balance valve bank; the oil return port of the reversing valve bank is communicated with the oil inlet of the main pump package; the hydraulic control system also comprises an oil supplement motor, an oil supplement pump and a hydraulic oil tank; the oil supplement motor is connected with the oil supplement pump; the oil inlet of the oil supplement pump is communicated with the oil outlet of the hydraulic oil tank; the oil outlet of the oil supplement pump is communicated with the oil inlet of the main pump package; the oil return port of the hydraulic oil tank is communicated with the oil return port of the reversing valve bank and the communicated pipeline is provided with a first one-way valve. The oil supplement motor is connected with the oil supplement pump, the oil supplement pump can sufficiently supplement hydraulic oil, and when the hydraulic pipeline is filled with the hydraulic oil, the first one-way valve can generate certain back pressure, the suction capacity of the main pump package is improved and the main pump package is prevented from sucking air and vibrating.
Description
Technical field
The present invention relates to ocean engineering hoist technical field, particularly a kind of ocean engineering crane hydraulic control system.
Background technique
Often can use the lifting mechanisms such as hoist in the engineering equipment of boats and ships and ocean platform, the hydraulic control system of hoist is very complicated, and the design rationality of crane hydraulic system directly has influence on the working life of associated component in hydraulic system.
The hydraulic system of ocean engineering hoist generally needs to use large-flow hydraulic system, the volume ratio of the hydraulic oil container needing coupling to use during large-flow hydraulic system work is larger, hydraulic oil in the hydraulic pipe line of such hydraulic system could run smoothness, but the equipment of extra large work hoist is set up closely due to space cloth, make again hydraulic oil container design smaller; Meanwhile, because offshore engineering equipment needs to work in the ocean that wind speed is larger, consider the impact of wind-force on hydraulic oil container and the maintenance convenience to hydraulic oil container, hydraulic oil container can not perch usually.
But realizing in process of the present invention, inventor finds that prior art at least exists following problem:
In the hydraulic system of the large discharge of existing ocean engineering hoist, due to the volume of hydraulic oil container generally design less, and the putting position of hydraulic oil container is lower, the precompression making the hydraulic oil at the inlet port place of pump group possess like this is not enough, when pump group runs up work, easily cause the oil suction of pump group not smooth, easily negative pressure is formed in the hydraulic pipe line at the inlet port place of pump group, easily there is air pocket in the inlet port place of pump group under negative pressure condition, cavitation phenomenon, the working life of pump group is reduced greatly, also whole hydraulic system can be caused to vibrate and produce larger noise simultaneously.
Summary of the invention
In order to solve the problem of prior art, embodiments provide a kind of ocean engineering crane hydraulic control system, technological scheme is as follows:
Embodiments provide a kind of ocean engineering crane hydraulic control system, described hydraulic control system comprises mair motor, main pump group, selector valve group, equilibrium valve group, oil hydraulic motor, described mair motor is connected with described main pump group, the oil outlet of described main pump group is communicated with the filler opening of described selector valve group, first oil outlet of described selector valve group, second oil outlet is communicated with two hydraulic fluid ports of described oil hydraulic motor respectively by described equilibrium valve group, the return opening of described selector valve group is communicated with the filler opening of described main pump group, described hydraulic control system also comprises repairing motor, slippage pump and hydraulic oil container,
Described repairing motor is connected with described slippage pump, the filler opening of described slippage pump is communicated with the oil outlet of described hydraulic oil container, the oil outlet of described slippage pump is communicated with the filler opening of described main pump group, the return opening of described hydraulic oil container is communicated with the return opening of described selector valve group and the hydraulic pipe line be communicated with is provided with the first one-way valve, the filler opening of described first one-way valve is communicated with the return opening of described selector valve group, and the oil outlet of described first one-way valve is communicated with the return opening of described hydraulic oil container.
Further, described selector valve group comprises three seven logical selector valves and three position three-way change valve, first hydraulic fluid port of described three seven logical selector valves is communicated with two hydraulic fluid ports of described oil hydraulic motor respectively by described equilibrium valve group with the second hydraulic fluid port, 3rd hydraulic fluid port of described three seven logical selector valves is communicated with the oil outlet of described main pump group, 4th hydraulic fluid port of described three seven logical selector valves is communicated with control port with the first hydraulic fluid port of described three position three-way change valve, 5th hydraulic fluid port of described three seven logical selector valves, 6th hydraulic fluid port is communicated with the 3rd hydraulic fluid port of described three position three-way change valve, 7th hydraulic fluid port of described three seven logical selector valves is communicated with the filler opening of described main pump group, second hydraulic fluid port of described three position three-way change valve is communicated with the control port of described main pump group.
Further, described main pump group comprises volume adjustable hydraulic pump, first two position three way directional control valve, second two position three way directional control valve and the 3rd two position three way directional control valve, the oil outlet of described volume adjustable hydraulic pump respectively with control port and second hydraulic fluid port of described first two position three way directional control valve, the control port of described second two position three way directional control valve and the second hydraulic fluid port, first hydraulic fluid port of described 3rd two position three way directional control valve is communicated with, first hydraulic fluid port of described first two position three way directional control valve is communicated with described second two position three way directional control valve the 3rd hydraulic fluid port, first hydraulic fluid port of described second two position three way directional control valve is communicated with the 3rd hydraulic fluid port of described 3rd two position three way directional control valve, second hydraulic fluid port of described 3rd two position three way directional control valve is connected straight-moving mechanism to control the displacement variation of described volume adjustable hydraulic pump respectively with the 3rd hydraulic fluid port of described first two position three way directional control valve, the control port of described first two position three way directional control valve is communicated with the second hydraulic fluid port of described three position three-way change valve.
Further, described equilibrium valve group comprises bi-bit bi-pass selector valve, first hydraulic fluid port of described bi-bit bi-pass selector valve is communicated with the first hydraulic fluid port of described three seven logical selector valves, second hydraulic fluid port of described bi-bit bi-pass selector valve is communicated with one of them hydraulic fluid port of described oil hydraulic motor, the control port of described bi-bit bi-pass selector valve is communicated with the second hydraulic fluid port of described three seven logical selector valves, the second one-way valve and throttle valve is provided with in described bi-bit bi-pass selector valve, when described bi-bit bi-pass selector valve is in the first state, described second one-way valve conducting, and one end of the filler opening of described second one-way valve is communicated with the first hydraulic fluid port of described three seven logical selector valves, when described bi-bit bi-pass selector valve is in the second state, described throttle valve conducting.
Further, the filler opening end of described bi-bit bi-pass selector valve and oil outlet end are parallel with a relief valve.
Further, the oil circuit that the control port of described bi-bit bi-pass selector valve is communicated with the second hydraulic fluid port of described three seven logical selector valves is provided with throttle valve and filter.
Further, the hydraulic pipe line be communicated with between the return opening of described selector valve group and the filler opening of described main pump group is main line, the filler opening of described first one-way valve is communicated with described main line, and the position that the filler opening of described first one-way valve is communicated with described main line is the peak in the hydraulic pipe line of hydraulic control system.
Further, the oil circuit between the return opening of described selector valve group and the filler opening of described main pump group is provided with pressure transducer.
Further, the pipeline be communicated with between the oil outlet of described main pump group and the filler opening of described selector valve group is provided with the 3rd one-way valve.
Further, be provided with one article of oil return pipeline between described oil scavenge pump and described hydraulic oil container and described oil return pipeline is provided with the 4th one-way valve.
The beneficial effect of the technological scheme that the embodiment of the present invention provides is:
By repairing motor is connected with slippage pump, slippage pump is communicated with hydraulic oil container and main pump group respectively, can be fully replenisher force feed the gas got rid of in hydraulic system in hydraulic system before the work of main pump group, the first one-way valve is provided with due on the hydraulic pipe line that is communicated with the return opening of selector valve group at the return opening of hydraulic oil container, when making to be full of hydraulic oil in hydraulic pipe line, the first one-way valve can produce certain back pressure, and then make the hydraulic oil at main pump group inlet port place form certain pressure, increase the suction capacity of main pump group, can prevent main pump group from inhaling empty and vibration, ensure that the working life of main pump group.
Accompanying drawing explanation
In order to be illustrated more clearly in the technological scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of ocean engineering crane hydraulic control system structural drawing that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment
See Fig. 1, embodiments provide a kind of ocean engineering crane hydraulic control system, hydraulic control system comprises mair motor 1, main pump group 2, selector valve group 3, equilibrium valve group 4, oil hydraulic motor 5, mair motor 1 is connected with main pump group 2, the oil outlet P1 of main pump group 2 is communicated with the oil inlet P 2 of selector valve group 3, first oil outlet, second oil outlet of selector valve group 3 are communicated with two hydraulic fluid ports A4, B4 of oil hydraulic motor 5 respectively by equilibrium valve group 4, and the oil return inlet T 1 of selector valve group 3 is communicated with the filler opening S1 of main pump group 2.
Wherein, hydraulic control system also comprises repairing motor 6, slippage pump 7 and hydraulic oil container 8, repairing motor 6 is connected with slippage pump 7, the filler opening S2 of slippage pump 7 is communicated with the oil outlet S3 of hydraulic oil container 8, the oil outlet P3 of slippage pump 7 is communicated with the filler opening S1 of main pump group 2, the oil return inlet T 2 of hydraulic oil container 8 is communicated with the oil return inlet T 1 of selector valve group 3 and the hydraulic pipe line be communicated with is provided with the first one-way valve 9, the filler opening of the first one-way valve 9 is communicated with the oil return inlet T 1 of selector valve group 3, and the oil outlet of the first one-way valve 9 is communicated with the oil return inlet T 2 of hydraulic oil container 8.
Particularly, hydraulic control system in the present embodiment mainly divides two-part, first portion is mair motor 1, main pump group 2, selector valve group 3, the main hydraulic system that equilibrium valve group 4 and oil hydraulic motor 5 are formed, main hydraulic system drives main pump group 2 pumping hydraulic oil by mair motor 1, two kinds through selector valve group 3 hydraulic control oil flow to the object reaching hydraulic control motor 5 clockwise and anticlockwise, the final action realizing the control each mechanism of hoist, equilibrium valve group 4 is for being in decline operating mode during at hoist, forming certain backpressure to the hydraulic oil in pipeline makes oil hydraulic motor 5 at the uniform velocity slowly run, prevent the goods stall on hoist from declining accidents caused, second portion is repairing motor 6, the repairing hydraulic system that slippage pump 7 and hydraulic oil container 8 are formed, control slippage pump 7 by repairing motor 6 to operate, slippage pump 7 starts the hydraulic oil extracted in hydraulic oil container 8 and is filled with in the hydraulic pipe line of main hydraulic system, before main pump group 2 works, the air in main hydraulic system pipeline can be discharged through hydraulic oil container 8, for filling into sufficient hydraulic oil in pipeline, in the present embodiment, the first one-way valve is arranged on the pipeline of connection between the working connection (hydraulic pipe line between the oil return inlet T 1 of selector valve group 3 and the filler opening S1 of main pump group 2) of main hydraulic system and hydraulic oil container 8, because one-way valve has certain cracking pressure and the simple cost of structure is lower, so adopt one-way valve as back pressure valve in the present embodiment, in pipeline, hydraulic oil is supplied rear first one-way valve place and can be formed certain back pressure, the hydraulic oil at the inlet port place of main pump group 2 is made to have certain precompression, and then increase when main pump group 2 operates from oil absorption, can prevent main pump group 2 from inhaling sky and vibration, ensure that the working life of main pump group 2.
Further, selector valve group 3 comprises three seven logical selector valve 3a and three position three-way change valve 3b, first hydraulic fluid port (B1) of three seven logical selector valve 3a and the second hydraulic fluid port (A1) are respectively by two the hydraulic fluid port (B4s of equilibrium valve group 4 with oil hydraulic motor 5, A4) be communicated with, 3rd hydraulic fluid port (P2) of three seven logical selector valve 3a is communicated with the oil outlet of main pump group 2, 4th hydraulic fluid port of three seven logical selector valve 3a is communicated with control port with first hydraulic fluid port of three position three-way change valve 3b, 5th hydraulic fluid port of three seven logical selector valve 3a, 6th hydraulic fluid port is communicated with the 3rd hydraulic fluid port of three position three-way change valve 3b, 7th hydraulic fluid port of three seven logical selector valve 3a is communicated with the filler opening of main pump group 2, the second hydraulic fluid port Ls2 of three position three-way change valve 3b is communicated with the control port Ls1 of main pump group 2.
Particularly, in the present embodiment, the hydraulic fluid port naming rule of hydraulic valve piece is the first hydraulic fluid port with hydraulic valve piece icon lower right corner hydraulic fluid port, name other hydraulic fluid ports successively clockwise, when three seven logical selector valve 3a are in the first state, first hydraulic fluid port of three seven logical selector valve 3a, the second hydraulic fluid port the respectively with four hydraulic fluid port, the 5th hydraulic fluid port, the 7th hydraulic fluid port are communicated with, 3rd hydraulic fluid port, the 6th hydraulic fluid port not conducting simultaneously, now main hydraulic system is that original state does not work; When three seven logical selector valve 3a are in the second state, first hydraulic fluid port of three seven logical selector valve 3a is communicated with the 7th hydraulic fluid port, second hydraulic fluid port is communicated with the 5th hydraulic fluid port, 3rd hydraulic fluid port is communicated with the 4th hydraulic fluid port, 6th hydraulic fluid port not conducting, the hydraulic oil traffic organising oil hydraulic motor 5 that now selector valve group 3 guides reverses; When three seven logical selector valve 3a are in the third state, first hydraulic fluid port of three seven logical selector valve 3a is communicated with the 6th hydraulic fluid port, second hydraulic fluid port is communicated with the 7th hydraulic fluid port, 3rd hydraulic fluid port is communicated with the 4th hydraulic fluid port, 5th hydraulic fluid port not conducting, the hydraulic oil traffic organising oil hydraulic motor 5 that now selector valve group 3 guides rotates forward.
When three position three-way change valve 3b is in the first initial state, three hydraulic fluid port not conductings of three position three-way change valve 3b, in pipeline, hydraulic oil can not flow; Along with entering of hydraulic oil, when three position three-way change valve 3b is in the first state, first hydraulic fluid port of three position three-way change valve 3b is communicated with the 3rd hydraulic fluid port, the second hydraulic fluid port not conducting, and the hydraulic oil in pipeline circulates smoothly; When the valve core opening in selector valve group 3 is excessive cause hydraulic fluid flow rate excessive time, three position three-way change valve 3b transfers the third state to, first hydraulic fluid port respectively with the second hydraulic fluid port, the 3rd hydraulic fluid port are communicated with, section hydraulic oil flows back to main pump group 2 and controls the discharge capacity of main pump group 2, thus control the uninterrupted of the hydraulic oil that main pump group 2 exports, the rotating speed of regulator solution pressure motor 5.
Further, main pump group 2 comprises volume adjustable hydraulic pump 2a, first two position three way directional control valve 2b, second two position three way directional control valve 2c and the 3rd two position three way directional control valve 2d, the oil outlet of volume adjustable hydraulic pump 2a respectively with control port and second hydraulic fluid port of the first two position three way directional control valve 2b, the control port of the second two position three way directional control valve 2c and the second hydraulic fluid port, first hydraulic fluid port of the 3rd two position three way directional control valve 2d is communicated with, first hydraulic fluid port of the first two position three way directional control valve 2b is communicated with the second two position three way directional control valve 2c the 3rd hydraulic fluid port, first hydraulic fluid port of the second two position three way directional control valve 2c is communicated with the 3rd hydraulic fluid port of the 3rd two position three way directional control valve 2d, second hydraulic fluid port of the 3rd two position three way directional control valve 2d is connected straight-moving mechanism with the displacement variation of controlled variable oil hydraulic pump 2a respectively with the 3rd hydraulic fluid port of the first two position three way directional control valve 2b, the control port of the first two position three way directional control valve 2b is communicated with second hydraulic fluid port of three position three-way change valve 3b.
Particularly, volume adjustable hydraulic pump 2a is used for transferring kinetic energy to hydraulic energy under the drive of mair motor 1, first two position three way directional control valve 2b is identical with the second two position three way directional control valve 2c, all that the first hydraulic fluid port is communicated with the 3rd hydraulic fluid port in a first state, second hydraulic fluid port not conducting, first hydraulic fluid port not conducting under second state, the second hydraulic fluid port is communicated with the 3rd hydraulic fluid port; 3rd two position three way directional control valve 2d is the first hydraulic fluid port not conducting in a first state, the second hydraulic fluid port and the 3rd hydraulic fluid port conducting, and under the second state, the first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, the second hydraulic fluid port not conducting; Three two position three way directional control valves are all under the control of the hydraulic oil that the hydraulic oil that exports in main pump group 2 and selector valve group 3 are fed back, and drive straight-moving mechanism to-and-fro motion to regulate the displacement size of main pump group 2, finally realize the control to the rotating speed of oil hydraulic motor 5.
Further, equilibrium valve group 4 comprises bi-bit bi-pass selector valve 4a, first hydraulic fluid port of bi-bit bi-pass selector valve 4a is communicated with first hydraulic fluid port of three seven logical selector valve 3a, second hydraulic fluid port of bi-bit bi-pass selector valve 4a is communicated with one of them hydraulic fluid port of oil hydraulic motor 5, and the control port of bi-bit bi-pass selector valve 4a is communicated with second hydraulic fluid port of three seven logical selector valve 3a.The second one-way valve and throttle valve is provided with in bi-bit bi-pass selector valve 4a, when bi-bit bi-pass selector valve 4a is in the first state, second one-way valve conducting, and one end of the filler opening of the second one-way valve is communicated with first hydraulic fluid port of three seven logical selector valve 3a, when bi-bit bi-pass selector valve 4a is in the second state, throttle valve conducting.
Particularly, equilibrium valve group 4 has four hydraulic fluid ports A2, A3, B2, B3, wherein the second hydraulic fluid port A1, the first hydraulic fluid port B1 of the logical selector valve 3 of A2, B2 respectively with three seven are connected, A3, B3 are connected with hydraulic fluid port A4, B4 of oil hydraulic motor 5 respectively, when the flow direction of the hydraulic oil that selector valve group 3 controls is the direction of oil hydraulic motor 5 rotating forward, bi-bit bi-pass selector valve 4a is in the first state, and now hoist is in rising operating mode; When the flow direction of the hydraulic oil that selector valve group 3 controls is the direction of oil hydraulic motor 5 reversion, the second state can be changed into after pilot control in bi-bit bi-pass selector valve 4a place, hoist is in decline operating mode, throttle valve now in bi-bit bi-pass selector valve 4a can reduce the flow of hydraulic oil, and the rotating speed reducing oil hydraulic motor 5 causes the accident to prevent goods stall from declining.
Further, the filler opening end of bi-bit bi-pass selector valve 4a and oil outlet end are parallel with a relief valve 4b.
Particularly, when relief valve 4b reverses for being in decline operating mode oil hydraulic motor 5 at hoist, the flow velocity of auxiliary restriction hydraulic oil, in hydraulic pipe line, produce the contrary pressure that to reverse with oil hydraulic motor 5, the oil pressure in stable hydraulic pipeline prevents the situation of goods stall decline on hoist to reach.
Further, the oil circuit that the control port of bi-bit bi-pass selector valve 4a is communicated with second hydraulic fluid port of three seven logical selector valve 3a is provided with throttle valve and filter.
Particularly, equilibrium valve group 4 is accurate hydraulic valve bank, uses throttle valve carry out current limliting and use filter to filter the hydraulic oil in pipeline, to work with ensureing the valve stability and safety such as bi-bit bi-pass selector valve 4a in equilibrium valve group 4.
Further, the hydraulic pipe line be communicated with between the return opening of selector valve group 3 and the filler opening of main pump group 2 is main line, the filler opening of the first one-way valve 9 is communicated with main line, and the position T4 that the filler opening of the first one-way valve 9 is communicated with main line is the peak in the hydraulic pipe line of hydraulic control system.
Particularly, hydraulic control system in the present embodiment is in the process of as installed, the position T4 point that the filler opening choosing the first one-way valve 9 is communicated with main line is as the peak on whole hydraulic system spatial position, can make slippage pump 7 like this after abundant repairing, unnecessary hydraulic oil gets back to hydraulic oil container 8 through peak T4 from the first one-way valve 9, is convenient to the air in the hydraulic pipe line of main hydraulic system fully to discharge.
Further, the oil circuit between the return opening of selector valve group 3 and the filler opening of main pump group 2 is provided with pressure transducer 10.
Particularly, pressure transducer 10 is arranged on the main hydraulic pipe line that is communicated with between selector valve group 3 with main pump group 2, can detect the oil pressure of hydraulic oil in main hydraulic pipe line in real time, for judge hydraulic control system pipeline in hydraulic oil whether be full of foundation be provided.
Further, the pipeline be communicated with between the oil outlet of main pump group 2 and the filler opening of selector valve group 3 is provided with the 3rd one-way valve 11.
Particularly, the 3rd one-way valve 11 is arranged on the oil outlet place of main pump group 2, mainly plays non-return effect to the hydraulic oil in pipeline, can prevent the oil pressure of hydraulic system from raising suddenly and cause pressure oil reverse back and the oil hydraulic pump 2a damaged in main pump group 2.
Further, be provided with one article of oil return pipeline between oil scavenge pump and hydraulic oil container 8 and oil return pipeline be provided with the 4th one-way valve 12.
Particularly, after slippage pump 7 is fill into sufficient hydraulic oil in hydraulic system, when slippage pump 7 continues repairing, the 4th one-way valve 12 can directly get back to hydraulic oil container 8 by the unnecessary hydraulic oil of guide portion.
The operating process of the crane hydraulic control system that the present embodiment provides is as follows:
When first time startup after hydraulic oil changed by hoist between defects liability period or when again starting after hoist is shut down, first start repairing motor 6, repairing motor 6 drives slippage pump 7 toward conveying liquid force feed in main hydraulic system, get rid of the gas in the pipeline of main hydraulic system simultaneously, when being gradually full of hydraulic oil in main hydraulic system, unnecessary hydraulic oil flows back to fuel tank through the first one-way valve 9 and the 4th one-way valve 12, when pressure transducer detects that in main line, the oil pressure of hydraulic oil reaches setting value, illustrate that in pipeline, hydraulic oil is full of completely, now could start the mair motor 1 in main hydraulic system, main hydraulic system brings into operation and drives hoist work.
A kind of ocean engineering crane hydraulic control system that the embodiment of the present invention provides, by repairing motor is connected with slippage pump, slippage pump is communicated with hydraulic oil container and main pump group respectively, can be fully replenisher force feed the gas got rid of in hydraulic system in hydraulic system before the work of main pump group, the first one-way valve is provided with due on the hydraulic pipe line that is communicated with the return opening of selector valve group at the return opening of hydraulic oil container, when making to be full of hydraulic oil in hydraulic pipe line, the first one-way valve can produce certain back pressure, and then make the hydraulic oil at main pump group inlet port place form certain malleation, increase the suction capacity of main pump group, can prevent main pump group from inhaling empty and vibration, ensure that the working life of main pump group.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an ocean engineering crane hydraulic control system, described hydraulic control system comprises mair motor, main pump group, selector valve group, equilibrium valve group, oil hydraulic motor, described mair motor is connected with described main pump group, the oil outlet of described main pump group is communicated with the filler opening of described selector valve group, first oil outlet of described selector valve group, second oil outlet is communicated with two hydraulic fluid ports of described oil hydraulic motor respectively by described equilibrium valve group, the return opening of described selector valve group is communicated with the filler opening of described main pump group, it is characterized in that, described hydraulic control system also comprises repairing motor, slippage pump and hydraulic oil container,
Described repairing motor is connected with described slippage pump, the filler opening of described slippage pump is communicated with the oil outlet of described hydraulic oil container, the oil outlet of described slippage pump is communicated with the filler opening of described main pump group, the return opening of described hydraulic oil container is communicated with the return opening of described selector valve group and the hydraulic pipe line be communicated with is provided with the first one-way valve, the filler opening of described first one-way valve is communicated with the return opening of described selector valve group, and the oil outlet of described first one-way valve is communicated with the return opening of described hydraulic oil container.
2. hydraulic control system according to claim 1, it is characterized in that, described selector valve group comprises three seven logical selector valves and three position three-way change valve, first hydraulic fluid port of described three seven logical selector valves is communicated with two hydraulic fluid ports of described oil hydraulic motor respectively by described equilibrium valve group with the second hydraulic fluid port, 3rd hydraulic fluid port of described three seven logical selector valves is communicated with the oil outlet of described main pump group, 4th hydraulic fluid port of described three seven logical selector valves is communicated with control port with the first hydraulic fluid port of described three position three-way change valve, 5th hydraulic fluid port of described three seven logical selector valves, 6th hydraulic fluid port is communicated with the 3rd hydraulic fluid port of described three position three-way change valve, 7th hydraulic fluid port of described three seven logical selector valves is communicated with the filler opening of described main pump group, second hydraulic fluid port of described three position three-way change valve is communicated with the control port of described main pump group.
3. hydraulic control system according to claim 2, it is characterized in that, described main pump group comprises volume adjustable hydraulic pump, first two position three way directional control valve, second two position three way directional control valve and the 3rd two position three way directional control valve, the oil outlet of described volume adjustable hydraulic pump respectively with control port and second hydraulic fluid port of described first two position three way directional control valve, the control port of described second two position three way directional control valve and the second hydraulic fluid port, first hydraulic fluid port of described 3rd two position three way directional control valve is communicated with, first hydraulic fluid port of described first two position three way directional control valve is communicated with described second two position three way directional control valve the 3rd hydraulic fluid port, first hydraulic fluid port of described second two position three way directional control valve is communicated with the 3rd hydraulic fluid port of described 3rd two position three way directional control valve, second hydraulic fluid port of described 3rd two position three way directional control valve is connected straight-moving mechanism to control the displacement variation of described volume adjustable hydraulic pump respectively with the 3rd hydraulic fluid port of described first two position three way directional control valve, the control port of described first two position three way directional control valve is communicated with the second hydraulic fluid port of described three position three-way change valve.
4. hydraulic control system according to claim 2, it is characterized in that, described equilibrium valve group comprises bi-bit bi-pass selector valve, first hydraulic fluid port of described bi-bit bi-pass selector valve is communicated with the first hydraulic fluid port of described three seven logical selector valves, second hydraulic fluid port of described bi-bit bi-pass selector valve is communicated with one of them hydraulic fluid port of described oil hydraulic motor, the control port of described bi-bit bi-pass selector valve is communicated with the second hydraulic fluid port of described three seven logical selector valves, the second one-way valve and throttle valve is provided with in described bi-bit bi-pass selector valve, when described bi-bit bi-pass selector valve is in the first state, described second one-way valve conducting, and one end of the filler opening of described second one-way valve is communicated with the first hydraulic fluid port of described three seven logical selector valves, when described bi-bit bi-pass selector valve is in the second state, described throttle valve conducting.
5. hydraulic control system according to claim 4, is characterized in that, the filler opening end of described bi-bit bi-pass selector valve and oil outlet end are parallel with a relief valve.
6. hydraulic control system according to claim 4, is characterized in that, the oil circuit that the control port of described bi-bit bi-pass selector valve is communicated with the second hydraulic fluid ports of described three seven logical selector valves is provided with throttle valve and filter.
7. hydraulic control system according to claim 1, it is characterized in that, the hydraulic pipe line be communicated with between the return opening of described selector valve group and the filler opening of described main pump group is main line, the filler opening of described first one-way valve is communicated with described main line, and the position that the filler opening of described first one-way valve is communicated with described main line is the peak in the hydraulic pipe line of hydraulic control system.
8. hydraulic control system according to claim 1, is characterized in that, the oil circuit between the return opening of described selector valve group and the filler opening of described main pump group is provided with pressure transducer.
9. hydraulic control system according to claim 1, is characterized in that, the pipeline be communicated with between the oil outlet of described main pump group and the filler opening of described selector valve group is provided with the 3rd one-way valve.
10. hydraulic control system according to claim 1, is characterized in that, is provided with one article of oil return pipeline and described oil return pipeline is provided with the 4th one-way valve between described oil scavenge pump and described hydraulic oil container.
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| CN201410627473.4A CN104358722B (en) | 2014-11-10 | 2014-11-10 | A kind of ocean engineering crane hydraulic control system |
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| CN201410627473.4A CN104358722B (en) | 2014-11-10 | 2014-11-10 | A kind of ocean engineering crane hydraulic control system |
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