CN209685254U - A kind of device for cantilever crane vibration damping - Google Patents
A kind of device for cantilever crane vibration damping Download PDFInfo
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- CN209685254U CN209685254U CN201822264141.0U CN201822264141U CN209685254U CN 209685254 U CN209685254 U CN 209685254U CN 201822264141 U CN201822264141 U CN 201822264141U CN 209685254 U CN209685254 U CN 209685254U
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- cantilever crane
- oil cylinder
- valve
- amplitude oil
- vibration damping
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Abstract
The utility model discloses a kind of device for cantilever crane vibration damping, described device includes at least lifting arm support and amplitude oil cylinder, and the amplitude oil cylinder is a kind of hydraulic cylinder, and one end is connect with cantilever crane；It is provided with balanced valve in amplitude oil cylinder, overflow valve is respectively arranged on the rod chamber and rodless cavity of amplitude oil cylinder, and the import of the overflow valve is connect with oil cylinder, the outlet of the overflow valve is connected with hydraulic tank.The utility model is suitable for vibration damping when cantilever crane stops suddenly under various working conditions, can substantially shorten the number and amplitude of vibration, or even can thoroughly eliminate rebound phenomena when cantilever crane stops, and has practical value.
Description
Technical field
The utility model is to be related to a kind of device for cantilever crane vibration damping, belongs to technical field of fire safety.
Background technique
With fire-fighting and rescue work more and more frequently, fire fighter for rescue outfit safety and comfort require get over
Come higher.And the main equipment elevating fire truck as high-altitude fire fighting and rescue, the movement speed of cantilever crane, robust motion, stopping
Accuracy and stopping stationarity are to measure the main indicator of its action performance.Movement speed can pass through the stream of increasing hydraulic system
To solve, robust motion can be solved amount by hydraulically balanced valve, this has been mature technology.And the stopping of cantilever crane is quasi-
True property and stopping stationarity, that is, cantilever crane damping property are the problems of current most producers urgent need to resolve.
It is well known that cantilever crane is as a kind of cantilever beam structure, movement velocity is faster, and shaking when stopping is also bigger, if
Reduce the movement velocity of cantilever crane, then rescue time will lengthen, and the two is conflicting.Cantilever crane shaking can aggravate operator and by
The Psychological phobia of rescue personnel influences its normal rescue work and carries out, and serious shaking can also make vehicle unstability, so that generating
The major accident of overturning.
Currently, there are mainly two types of the common methods of cantilever crane vibration damping, a kind of method is the slope side by electric control system
Formula carries out deceleration stopping come the movement to cantilever crane, and the defect of this method is, if slope setting is too long, cantilever crane stop position it is accurate
Property it is just too poor, can deviate from required operating position, in addition result from outer barrie object collision danger, if slope was arranged
Short, the shaking of cantilever crane just cannot be controlled effectively, i.e., slope terminates, and cantilever crane is still shaking, because of cantilever crane institute under various operating conditions
The ramp parameter for needing to be arranged is different, and slope setting cannot be adjusted in real time according to the working condition of cantilever crane, therefore this kind of method office
It is sex-limited very big.Another method be then using cushion cylinder, the disadvantages of the method are as follows, cushion cylinder can only be stretched or be reduced in oil cylinder
Extreme position just works, and does not work for middle position, and practicability is too poor.
Utility model content
Cantilever crane can be effectively controlled in view of the above problems existing in the prior art, the purpose of the utility model is to provide one kind to stop
The device for cantilever crane vibration damping vibrated when only.
To achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of device for cantilever crane vibration damping, includes at least lifting arm support and amplitude oil cylinder, and the amplitude oil cylinder is one
Kind hydraulic cylinder, one end are connect with cantilever crane, for driving cantilever crane to carry out pitching movement；Balanced valve is provided in amplitude oil cylinder,
For controlling stationarity of the cantilever crane in luffing movement；It is respectively arranged on the rod chamber and rodless cavity of the amplitude oil cylinder excessive
Valve is flowed, and the import of the overflow valve is connect with oil cylinder, the outlet of the overflow valve is connected with hydraulic tank.
As a preferred embodiment, the overflow valve be a kind of Electric-hydraulic proportional pressure control valve, by adjust electric signal come
Change the cracking pressure of overflow valve, overflow valve is in off state always in the power-off state.
As a preferred embodiment, the rod chamber and rodless cavity of the amplitude oil cylinder are respectively arranged with the sensing of measurement oil pressure
Device.
As a preferred embodiment, described device is additionally provided with the reversal valve of Electromagnetic Control.
As a preferred embodiment, the cantilever crane is equipped with but is not limited to lower sensor: measurement cantilever crane length and angle
Sensor, measure cantilever crane service load sensor, for length, angle and service load of real-time Transmission cantilever crane etc. letter
Breath.
As a preferred embodiment, described device is additionally provided with controller, and the controller is arranged on cantilever crane by reading
Sensing data is calculated, and judges whether reversal valve is opened according to the output of the signal of the reversal valve of Electromagnetic Control, further right
Electric-hydraulic proportion Pressure relief valve is controlled.
Compared to the prior art, the advantageous effects of the utility model are:
1, vibration damping when stopping suddenly under various working conditions suitable for cantilever crane；
2, it can substantially shorten the number and amplitude of vibration, or even thoroughly eliminate rebound phenomena when cantilever crane stops.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of common Elevating platform fire truck；
Fig. 2 is the force analysis figure of serial number 2 in Fig. 1；
Fig. 3 is the working principle diagram that device described in embodiment realizes vibration damping.
Figure label is schematically as follows: 1, turntable；2, oil pressure sensor；3, amplitude oil cylinder；4, oil pressure sensor；5, long angle passes
Sensor；6, luffing cantilever crane；7, controller；8, weighing sensor；9, workbench；10, electricity liquid ratio relief valve；11, two-phase is flat
Weigh valve；12, electro-hydraulic proportion reversing valve；13, electricity liquid ratio relief valve；14, unidirectional Fill valve.
Specific embodiment
The technical solution of the utility model is described in further detail below in conjunction with drawings and examples.
Embodiment
It please refers to shown in Fig. 1: a kind of device for cantilever crane vibration damping provided in this embodiment, including turntable 1, oil pressure sensing
Device 2, amplitude oil cylinder 3, oil pressure sensor 4, long angle transducer 5, luffing cantilever crane 6, controller 7, weighing sensor 8, workbench
9, electricity liquid ratio relief valve 10, biphase equilibrium valve 11, electro-hydraulic proportion reversing valve 12 and electricity liquid ratio relief valve 13.
Book turntable 1 as described in the examples is a kind of rotary platform, is connect by pivoting support with lower part car body.Turn
Controller 7 is installed on platform 1, for acquire sensor signal (such as oil pressure sensor 2, oil pressure sensor 4, long angle transducer 5,
Weighing sensor 8) and analytical calculation is carried out, executing agency is output a control signal to according to set program, as electric-hydraulic proportion is overflow
Flow valve 10, electro-hydraulic proportion reversing valve 12, electricity liquid ratio relief valve 13.
Luffing cantilever crane 6 described in the present embodiment is telescopic structure, one end and turntable 1 using articulated connection, the other end
It is hinged with workbench 9, the long angle transducer 5 of real-time measurement cantilever crane length and pitch angle is installed on luffing cantilever crane 6.
Amplitude oil cylinder 3 described in the present embodiment is a kind of hydraulic cylinder, and one end is hinged on turntable 1, and the other end is hinged
On luffing cantilever crane 6, flexible by oil cylinder can drive the table-hinges point that rotates of luffing cantilever crane 6 to carry out pitching movement.Amplitude oil cylinder 3
It is separately installed with oil pressure sensor 2, oil pressure sensor 4 on rodless cavity and rod chamber, is used for real-time measurement rodless cavity and rod chamber
Oil pressure.
Workbench 9 described in the present embodiment is hinged on luffing cantilever crane 6, can carry out pitching leveling around articulated shaft.Work
Make that weighing sensor 8 is installed on platform 9, for the practical receiving load in real-time measurement platform.
As shown in figure 3, be connected separately on the rodless cavity and rod chamber of the amplitude oil cylinder 3 electricity liquid ratio relief valve 10,
Electricity liquid ratio relief valve 13.The electricity liquid ratio relief valve 10, electricity liquid ratio relief valve 13 can be split by the size of electric current
It opens pressure and carries out the stepless control of ratio.When off-position, electricity liquid ratio relief valve 10, electricity liquid ratio relief valve 13 become ending
Valve.
As shown in figure 3, luffing cantilever crane 6 carries out commutation action by electro-hydraulic proportion reversing valve 12 as a kind of common configuration.
As shown in figure 3, locking reliability when robust motion and stopping ensuring luffing cantilever crane 6, in amplitude oil cylinder 3
Biphase equilibrium valve 11 is installed.
As shown in figure 3, between the outlet of electricity liquid ratio relief valve 10 and the rodless cavity of amplitude oil cylinder 3, electric-hydraulic proportion overflow
It flows and is respectively equipped with unidirectional Fill valve 14 between the outlet of valve 13 and the rod chamber of amplitude oil cylinder 3.
Triangle shown in Fig. 2 is made of the connection hinge of turntable 1, amplitude oil cylinder 3, luffing cantilever crane 6, and three in figure
Angular side length a, b is known parameters, and angle, θ can be read by controller 7 by long angle transducer 5.It will be evident that luffing cantilever crane 6
Self gravity, the real load on workbench and self gravity load can be reduced to power N and the power around luffing range of cantilever support hinge
Square M, power N and torque M can pass through each joint arm weight of long angle transducer 5, weighing sensor 8, luffing cantilever crane 6 by controller 7
And it known to the weight and position of centre of gravity etc. of position of centre of gravity, workbench or parameter can be surveyed is calculated.The power of oil cylinder F table
Show, according to equalising torque and the cosine law, be not difficult to calculate:
The rodless cavity of amplitude oil cylinder 3 is surveyed into oil pressure PAIt indicates, the actual measurement oil pressure P of rod chamberBIt indicates, cantilever crane is being worked as
Rodless cavity oil pressure when the rest equilibrium state of front position indicates that the rodless cavity oil stream sectional area of rodless cavity indicates there is bar with A with P
Chamber oil stream sectional area indicates with B, then
F=PA-PBB
In conjunction with two above formula, it can be deduced that:
The course of work that cantilever crane vibration damping is realized using the utility model above-mentioned apparatus, is included the following steps:
The first step calculates cantilever crane according to the various kinds of sensors data being arranged on cantilever crane in real time and is in equilibrium-like in current location
Oil pressure P needed for the rodless cavity of amplitude oil cylinder 3 when state；
Second step, controller judgement will open electric-hydraulic proportion Pressure relief valve 10, electricity when the following conditions meet simultaneously
Liquid proportional Pressure relief valve 13, the cracking pressure of synchronization settings electric-hydraulic proportion Pressure relief valve 10 are P1, set electric-hydraulic proportion pressure
The cracking pressure of power overflow valve 13 is P2；If setting safety coefficient as 1% (can be adjusted according to actual needs), then P1=
P × 1%, P2 can be set as needed as definite value, and vibration damping process starts；
Condition 1: electro-hydraulic proportion reversing valve 12 is in close state；
Condition 2: the actual measurement oil pressure PA of the rodless cavity of amplitude oil cylinder 3 is greater than P1；
Third step issues signal and to electric-hydraulic proportion when controller detects that PA keeps stablizing and being less than or equal to P1
Overflow valve 10, electric-hydraulic proportion Pressure relief valve 13 power off, and vibration damping process terminates.
From the foregoing, it will be observed that i.e. the rodless cavity oil liquid of amplitude oil cylinder 3 is flowed back to by electricity liquid ratio relief valve 10 after vibration damping starts
Fuel tank, rod chamber then carry out repairing by unidirectional Fill valve 14.On the contrary, the oil liquid of rod chamber passes through when cantilever crane has a rebound
Electricity liquid ratio relief valve 13 flows back to fuel tank, and rodless cavity then carries out repairing by unidirectional Fill valve 14.The basic reason of vibration is exactly
Oil after electro-hydraulic proportion reversing valve 12 is closed suddenly, when the inertia of cantilever crane and load makes the oil pressure of rodless cavity deviate equilibrium state
Press P, as long as therefore cantilever crane will not continue in equilibrium state, electric-hydraulic proportion Pressure relief valve 10 or electric-hydraulic proportion Pressure relief valve 13
Damping vibration attenuation function is played, until cantilever crane is in static stable state.Moreover, vibration damping is unrelated with the position of cantilever crane and load, fit
For any position of cantilever crane and state.The safety coefficient of P1 only need to be rationally set, one can be converted by the free vibration of cantilever crane
Secondary moderating process substantially increases the safety of cantilever crane and vehicle and the comfort of personnel.
Visible in summary: device described in the utility model is suitable for when cantilever crane stops suddenly under various working conditions
Vibration damping can substantially shorten the number and amplitude of vibration, or even can thoroughly eliminate rebound phenomena when cantilever crane stops；Therefore, this reality
With it is novel compared with the existing technology, tool has made marked progress and practicability.
It is last it is necessarily pointed out that: the foregoing is merely the preferable specific embodiments of the utility model, but this
The protection scope of utility model is not limited thereto, and anyone skilled in the art discloses in the utility model
In technical scope, any changes or substitutions that can be easily thought of, should be covered within the scope of the utility model.
Claims (6)
1. a kind of device for cantilever crane vibration damping includes at least lifting arm support and amplitude oil cylinder, it is characterised in that: the luffing
Oil cylinder is a kind of hydraulic cylinder, and one end is connect with cantilever crane；Balanced valve is provided in amplitude oil cylinder, in the rod chamber of amplitude oil cylinder
With overflow valve is respectively arranged on rodless cavity, and the import of the overflow valve is connect with oil cylinder, the outlet of the overflow valve and liquid
The connection of pressure oil case.
2. the apparatus according to claim 1, it is characterised in that: the overflow valve is a kind of Electric-hydraulic proportional pressure control valve.
3. the apparatus according to claim 1, it is characterised in that: the rod chamber and rodless cavity of the amplitude oil cylinder are respectively set
There is the sensor of measurement oil pressure.
4. the apparatus according to claim 1, it is characterised in that: the device is additionally provided with the reversal valve of Electromagnetic Control.
5. the apparatus according to claim 1, it is characterised in that: the cantilever crane is equipped with but is not limited to lower sensor: surveying
The sensor of cantilever crane length and angle is measured, the sensor of cantilever crane service load is measured.
6. the apparatus according to claim 1, it is characterised in that: the device is additionally provided with controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822264141.0U CN209685254U (en) | 2018-12-31 | 2018-12-31 | A kind of device for cantilever crane vibration damping |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822264141.0U CN209685254U (en) | 2018-12-31 | 2018-12-31 | A kind of device for cantilever crane vibration damping |
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| Publication Number | Publication Date |
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| CN209685254U true CN209685254U (en) | 2019-11-26 |
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| CN201822264141.0U Active CN209685254U (en) | 2018-12-31 | 2018-12-31 | A kind of device for cantilever crane vibration damping |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307012A (en) * | 2021-12-29 | 2022-04-12 | 徐工消防安全装备有限公司 | Fire-fighting operation vehicle control device, control method and fire-fighting operation vehicle |
-
2018
- 2018-12-31 CN CN201822264141.0U patent/CN209685254U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307012A (en) * | 2021-12-29 | 2022-04-12 | 徐工消防安全装备有限公司 | Fire-fighting operation vehicle control device, control method and fire-fighting operation vehicle |
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