CN205527451U - Hoist is with full closed -type hydraulic system - Google Patents
Hoist is with full closed -type hydraulic system Download PDFInfo
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- CN205527451U CN205527451U CN201620350779.4U CN201620350779U CN205527451U CN 205527451 U CN205527451 U CN 205527451U CN 201620350779 U CN201620350779 U CN 201620350779U CN 205527451 U CN205527451 U CN 205527451U
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Abstract
The utility model provides a hoist is with full closed -type hydraulic system. The problem of current hoist hydraulic system energy loss big, system calorific capacity is big, it is poor to control the performance is solved. It includes pump motor, luffing cylinder, master file motor, extra motor, flexible hydro -cylinder, a closed type pump, first slippage pump, first one -way valves, the 2nd closed type pump, second slippage pump and the one -way valves of second, the second slippage pump be linked together through one -way valves of second and the 2nd closed type pump, the 2nd closed type pump be connected through second diverter valve and luffing cylinder, extra motor, flexible hydro -cylinder, flexible hydro -cylinder have pole chamber and a flexible no pole chamber including flexible, the pump motor be linked together with flexible no pole chamber. The utility model has the advantages of the manipulation is steady, energy -conserving, energy recuperation is easier, and hydraulic component is less, the volume undersize, and convenient assembling, the cost is few, long service life.
Description
Technical field
This utility model relates to the hydraulic system of a kind of crane, is specifically related to a kind of crane closed hydraulic system.
Background technology
Telescopic arm crane has a following action: elevator, luffing, flexible and revolution.Elevator and revolution use motor as executive component, luffing and flexible employing oil cylinder are as executive component, owing to oil cylinder exists area ratio, rod chamber makes the effective area area much smaller than rodless cavity of rod chamber due to the structure of piston rod, i.e. oil-feed or fuel-displaced time, owing to piston movement speed is identical relative to rod chamber and rodless cavity, causing turnover oil asymmetric, therefore telescopic arm crane all uses open type hydraulic system.From the concrete principle of crane, weight is sling by crane by hoisting mechanism, select to be put down by weight elsewhere, additionally be also required to amplitude oil cylinder stretch and adjust the distance of weight, there is substantial amounts of gravity in the course of the work and do the operating mode of negative work, and open system to be the throttle style by balanced valve overcome gravity to do negative work, therefore there is substantial amounts of energy loss, and cause system heat generation amount excessive, shorten the service life of Hydraulic Elements, reduce the reliability of hydraulic system；Additionally open system is difficult to perfect degree in terms of the recovery of energy and the maneuvering performance of system；But traditional closed type hydraulic system needs the corresponding motor of a hydraulic pump, and Hydraulic Elements are more, and volume is excessive, assembling trouble is relatively costly；Additionally the asymmetrical hydraulic jack of control be there is also difficulty.
Summary of the invention
Big for solving existing crane hydraulic system energy loss in background technology, system heat generation amount is big, the problem of handling difference, and this utility model provides a kind of crane closed hydraulic system.
nullThe technical solution of the utility model is: a kind of crane closed hydraulic system，Including movement device、First control device、Second control device and pump motor，Described movement device includes amplitude oil cylinder、Master file motor、Secondary volume motor、Telescopic oil cylinder，Described first control device includes the first enclosed pump、First slippage pump and the first check valve group，Described second control device includes the second enclosed pump、Second slippage pump and the second check valve group，The first described slippage pump is connected with the first enclosed pump by the first check valve group，The first described enclosed pump is by the first switching valve and amplitude oil cylinder、Master file motors connects，The second described slippage pump is connected with the second enclosed pump by the second check valve group，The second described enclosed pump is by the second switching valve and amplitude oil cylinder、Secondary volume motor、Telescopic oil cylinder is connected，Described telescopic oil cylinder includes flexible rod chamber and flexible rodless cavity，Described pump motor is connected with flexible rodless cavity.
As a kind of improvement of the present utility model, the oil-out of described pump motor is located between oil-out and the flexible rodless cavity of telescopic oil cylinder of the second switching valve.
As further improvement of the utility model, the oil-out of described pump motor is located between the oil-out of the second enclosed pump and the oil-in of the second switching valve.
As further improvement of the utility model, the oil-out interflow of the oil-out of described pump motor and the oil-out of the first enclosed pump, the second enclosed pump is arranged.
As further improvement of the utility model, the oil-out of described pump motor is connected with flexible rodless cavity by the 3rd switching valve.
As further improvement of the utility model, also include that accumulator, the 3rd described switching valve have the primary importance being connected so that pump motor and the second position that pump motor is connected with accumulator with flexible rodless cavity.
As further improvement of the utility model, also include the first overflow valve and the second overflow valve, the oil-in of described first overflow valve and the oil-out of the first slippage pump are connected, the described oil-in of the 2nd 1 overflow valve and the oil-out of the second slippage pump are connected, and the oil-out of described first overflow valve, the oil-out of the second overflow valve are all connected with fuel tank.
As further improvement of the utility model, the first described switching valve is two six-way transfer valves, and the second described switching valve is three eight and leads to reversal valve.
The beneficial effects of the utility model are: the closed hydraulic system that this utility model uses, enclosed pump so that in system hydraulic oil recycle always, make the low cost of hydraulic system, system simply be easy to control, it is achieved that the switching of each action smooth-going, improve the effect of composite move, and there is steady, energy-conservation, the energy regenerating of manipulation be easier, Hydraulic Elements are less, and volume is too small, easy to assembly, cost is few, service life the advantage such as length.
Accompanying drawing explanation
Accompanying drawing 1 is the hydraulic schematic diagram of this utility model embodiment one.
Accompanying drawing 2 is the hydraulic schematic diagram of this utility model embodiment two.
Accompanying drawing 3 is the hydraulic schematic diagram of this utility model embodiment three.
In figure, the 1, first enclosed pump；2, the first slippage pump；3, the first check valve；4, the first overflow valve；5, the second check valve；6, the first switching valve；7, the second enclosed pump；8, the second slippage pump；9, the 3rd check valve；10, the second overflow valve；11, the 4th check valve；12, the second switching valve；13, pump motor；14, amplitude oil cylinder；15, master file motor；16, secondary volume motor；17, telescopic oil cylinder；171, flexible rodless cavity；172, flexible rod chamber；18, the 3rd switching valve；19, accumulator.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model embodiment is described further:
Fig. 2 is combined by Fig. 1, shown in 3, a kind of crane closed hydraulic system, including movement device, first control device, second control device and pump motor 13, described movement device includes amplitude oil cylinder 14, master file motor 15, secondary volume motor 16, telescopic oil cylinder 17, described amplitude oil cylinder is symmetrical expression amplitude oil cylinder, symmetrical expression amplitude oil cylinder refers to that the effective area of rod chamber is almost identical with the effective area of rodless cavity, oil-feed or fuel-displaced time, owing to piston movement speed is identical relative to rod chamber and rodless cavity, in work, rod chamber oil-feed is fuel-displaced with rodless cavity almost equal.Described first control device includes the first enclosed pump the 1, first slippage pump 2 and the first check valve group, and the first check valve group includes the first check valve 3 and the second check valve 5；Described second control device includes the second enclosed pump the 7, second slippage pump 8 and the second check valve group, and the second check valve group includes the 3rd check valve 9 and the 4th check valve 11；The first described slippage pump 2 is connected with the first enclosed pump 1 by the first check valve group, the first described enclosed pump 1 is connected with amplitude oil cylinder 14, master file motor 15 by the first switching valve 6, the second described slippage pump 8 is connected with the second enclosed pump 7 by the second check valve group, certainly the first slippage pump and the second slippage pump described in this utility model can be merged into a slippage pump, for amplitude oil cylinder and telescopic oil cylinder repairing.The second described enclosed pump 7 is connected with amplitude oil cylinder 14, secondary volume motor 16, telescopic oil cylinder 17 by the second switching valve 12, described telescopic oil cylinder 17 includes flexible rodless cavity 171 and flexible rod chamber 172, and described pump motor 13 is connected with flexible rodless cavity 171.The first described switching valve is two six-way transfer valves, and the second described switching valve is three eight and leads to reversal valve.The beneficial effects of the utility model are: the closed hydraulic system that this utility model uses, enclosed pump so that in system hydraulic oil recycle always, make the low cost of hydraulic system, system simply be easy to control, it is achieved that the switching of each action smooth-going, improve the effect of composite move, and there is steady, energy-conservation, the energy regenerating of manipulation be easier, Hydraulic Elements are less, and volume is too small, easy to assembly, cost is few, service life the advantage such as length.
Embodiment one: referring to accompanying drawing 1, the oil-out of described pump motor 13 is located between oil-out and the flexible rodless cavity 171 of telescopic oil cylinder 17 of the second switching valve 12.Embodiment two: referring to accompanying drawing 2, the oil-out of described pump motor 13 is located between the oil-out of the second enclosed pump 7 and the oil-in of the second switching valve 12.Embodiment three: referring to accompanying drawing 3, the oil-out interflow of the oil-out of described pump motor 13 and the oil-out of the first enclosed pump 1, the second enclosed pump 7 is arranged.This utility model provides three kinds of modes realize pump motor repairing and recover energy, it is ensured that product action message.
The oil-out of described pump motor 13 is connected with flexible rodless cavity 171 by the 3rd switching valve 18.Also include that accumulator 19, the 3rd described switching valve 18 have the primary importance being connected so that pump motor 13 and the second position that pump motor 13 is connected with accumulator 19 with flexible rodless cavity 171.When other actions of crane do composite move with the semi-girder of telescopic oil cylinder, illustrating that crane is doing zero load or underloading operation, the most substantially do not have energy to reclaim, the electromagnetic valve of the 3rd switching valve obtains electric, and telescopic oil cylinder fuel feeding preferentially given by pump motor 13.When stretching motionless, when elevator falls or luffing falls, the electromagnetic valve of the 3rd switching valve must not be electric, and hydraulic oil reservoir, to accumulator 19 fuel feeding, is stored away by pump motor, promotes hoisting crane or luffing to play action, plays the effect of energy regenerating, reduces energy expenditure.
This utility model also includes the first overflow valve 4 and the second overflow valve 10, the oil-in of described first overflow valve 4 and the oil-out of the first slippage pump 2 are connected, the oil-in of described second overflow valve 10 and the oil-out of the second slippage pump 8 are connected, and the oil-out of described first overflow valve 4, the oil-out of the second overflow valve 10 are all connected with fuel tank.Such structure makes security of system performance more preferable, it is ensured that the action message of product.
Hereinafter operation principle of the present utility model is described further:
1. single movement
1) master winch single movement
The electromagnetic valve 6a of the first switching valve must not be electric, and the first switching valve 6 is in right position, and the first enclosed pump 1 electromagnetic valve obtains electric, and enclosed pumpage is increased by zero, drives master file motor 15.
2) secondary elevator single movement
Second switching valve 12 is in middle position, and the second enclosed pump 7 electromagnetic valve obtains electric, and the second enclosed pumpage is increased by zero, drives pair volume motor 16.
3) luffing single movement
Amplitude oil cylinder substantially belongs to symmetrical oil cylinder.When luffing rises, the electromagnetic valve 12a of the first switching electromagnetic valve 6a of valve 6 and the second switching valve 12 simultaneously electric, first enclosed pump 1 electromagnetic valve 1a and the second enclosed pump 7 electromagnetic valve 7a obtains electric, the hydraulic oil of the first enclosed pump 1 and the second enclosed pump 7 enters rodless cavity, and the hydraulic oil of rod chamber is by first switching valve 6 and second switching 12 times respective enclosed pumps of valve；When luffing falls, the electromagnetic valve 12a of the first switching electromagnetic valve 6a of valve 6 and the second switching valve 12 simultaneously electric, first enclosed pump 1 electromagnetic valve 1b and the second enclosed pump 7 electromagnetic valve 7b obtains electric, the hydraulic oil of the first enclosed pump 1 and the second enclosed pump 7 enters rod chamber, and the hydraulic oil of rodless cavity is by first switching valve 6 and second switching 12 times each self-closing pumps of valve.
3) flexible single movement
Owing to telescopic oil cylinder does not accomplishes symmetrical oil cylinder, therefore turnover oil mass differs, and therefore needs load pump motor 13.
When stretching, the electromagnetic valve 12b of the second switching valve 12 obtains electric, second enclosed pump 7 electromagnetic valve 7a and pump motor 13 electromagnetic valve 13a obtains electric, the hydraulic oil of the second enclosed pump 7 and pump motor 13 enters flexible rodless cavity 171, the hydraulic oil of flexible rod chamber 172 is by second switching 12 times the second enclosed pumps of valve, it is achieved that the enclosed of asymmetric cylinder controls；During flexible contracting, the electromagnetic valve 12b of the second switching valve 12 obtains electric, second enclosed pump 7 electromagnetic valve 7b and pump motor 13 electromagnetic valve 13a obtains electric, the hydraulic oil of the second enclosed pump 7 enters flexible rod chamber, a hydraulic oil part for flexible rodless cavity is by second switching 12 times the second enclosed pumps of valve, a part is by pump motor 13 oil sump tank, it is achieved that the enclosed of asymmetric cylinder controls.
2. composite move
The most frequently used composite move of crane includes: master file and secondary volume, master file and luffing, master file and volume flexible, secondary and luffing.Flexible and luffing, secondary volume do not do composite move with flexible.
1) master file and secondary volume
First enclosed pump 1 drives master file motor 15 by the first switching valve 6, when needing compound pair volume, and the second enclosed pump 7 fuel feeding, drive secondary volume motor 16 by the second switching valve 12, it is achieved master file is compound with secondary volume.
2) master file and luffing
First enclosed pump 1 drives master file motor 15 by the first switching valve 6, when needing compound luffing, and the second enclosed pump 7 fuel feeding, obtain electric by the electromagnetic valve 12a of the second switching valve 12, drive amplitude oil cylinder 14, it is achieved master file is compound with luffing.
3) master file is with flexible
First enclosed pump 1 switches valve 6 by first and drives master file motor 15, when needing composite telescopic, and the second enclosed pump 7 and pump motor 13 fuel feeding, obtain electric by the electromagnetic valve 12b of the second switching valve 12, drive telescopic oil cylinder 17, it is achieved master file is combined with flexible.
4) secondary volume and luffing
Second enclosed pump 7 drives secondary volume motor 16, when needing compound luffing, the first enclosed pump 1 fuel feeding by the second switching valve 12, obtains electric by the electromagnetic valve 6a of the first switching valve 6, drives amplitude oil cylinder 14, it is achieved secondary volume is compound with luffing.
Every technical staff's notice: although this utility model describes according to above-mentioned detailed description of the invention; but invention thought of the present utility model is not limited to that utility model; the repacking of any utilization inventive concept, all will include in this patent scope of patent protection.
Claims (8)
- null1. a crane closed hydraulic system，It is characterized in that: include movement device、First control device、Second control device and pump motor，Described movement device includes amplitude oil cylinder、Master file motor、Secondary volume motor、Telescopic oil cylinder，Described first control device includes the first enclosed pump、First slippage pump and the first check valve group，Described second control device includes the second enclosed pump、Second slippage pump and the second check valve group，The first described slippage pump is connected with the first enclosed pump by the first check valve group，The first described enclosed pump is by the first switching valve and amplitude oil cylinder、Master file motors connects，The second described slippage pump is connected with the second enclosed pump by the second check valve group，The second described enclosed pump is by the second switching valve and amplitude oil cylinder、Secondary volume motor、Telescopic oil cylinder is connected，Described telescopic oil cylinder includes flexible rod chamber and flexible rodless cavity，Described pump motor is connected with flexible rodless cavity.
- A kind of crane closed hydraulic system the most according to claim 1, it is characterised in that the oil-out of described pump motor is located between oil-out and the flexible rodless cavity of telescopic oil cylinder of the second switching valve.
- A kind of crane closed hydraulic system the most according to claim 1, it is characterised in that the oil-out of described pump motor is located between the oil-out of the second enclosed pump and the oil-in of the second switching valve.
- A kind of crane closed hydraulic system the most according to claim 1, it is characterised in that the oil-out interflow of the oil-out of described pump motor and the oil-out of the first enclosed pump, the second enclosed pump is arranged.
- A kind of crane closed hydraulic system the most according to claim 1, it is characterised in that the oil-out of described pump motor is connected with flexible rodless cavity by the 3rd switching valve.
- A kind of crane closed hydraulic system the most according to claim 5, characterized by further comprising accumulator, the 3rd described switching valve has the primary importance being connected so that pump motor and the second position that pump motor is connected with accumulator with flexible rodless cavity.
- A kind of crane closed hydraulic system the most according to claim 1, characterized by further comprising the first overflow valve and the second overflow valve, the oil-in of described first overflow valve and the oil-out of the first slippage pump are connected, the oil-in of described second overflow valve and the oil-out of the second slippage pump are connected, and the oil-out of described first overflow valve, the oil-out of the second overflow valve are all connected with fuel tank.
- A kind of crane closed hydraulic system the most according to claim 1, it is characterised in that the first described switching valve is two six-way transfer valves, the second described switching valve is three eight and leads to reversal valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620350779.4U CN205527451U (en) | 2016-04-25 | 2016-04-25 | Hoist is with full closed -type hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620350779.4U CN205527451U (en) | 2016-04-25 | 2016-04-25 | Hoist is with full closed -type hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205527451U true CN205527451U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620350779.4U Active CN205527451U (en) | 2016-04-25 | 2016-04-25 | Hoist is with full closed -type hydraulic system |
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| Country | Link |
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| CN (1) | CN205527451U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486337A (en) * | 2019-09-11 | 2019-11-22 | 三一海洋重工有限公司 | Multiple cavity oil cylinder closed type hydraulic system and engineering machinery |
| CN110671375A (en) * | 2019-11-06 | 2020-01-10 | 桥弘数控科技（上海）有限公司 | A kind of servo hydraulic device and its control method |
| CN111237294A (en) * | 2020-01-10 | 2020-06-05 | 浙江中锐重工科技有限公司 | Hydraulic system of walking pile driver |
-
2016
- 2016-04-25 CN CN201620350779.4U patent/CN205527451U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486337A (en) * | 2019-09-11 | 2019-11-22 | 三一海洋重工有限公司 | Multiple cavity oil cylinder closed type hydraulic system and engineering machinery |
| CN110671375A (en) * | 2019-11-06 | 2020-01-10 | 桥弘数控科技（上海）有限公司 | A kind of servo hydraulic device and its control method |
| CN111237294A (en) * | 2020-01-10 | 2020-06-05 | 浙江中锐重工科技有限公司 | Hydraulic system of walking pile driver |
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