CN108439219A - Can automatic identification weight balance weight system and control method - Google Patents
Can automatic identification weight balance weight system and control method Download PDFInfo
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- CN108439219A CN108439219A CN201810607880.7A CN201810607880A CN108439219A CN 108439219 A CN108439219 A CN 108439219A CN 201810607880 A CN201810607880 A CN 201810607880A CN 108439219 A CN108439219 A CN 108439219A
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- oil
- balance weight
- oil cylinder
- fuel feeding
- weight
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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
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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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
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
Abstract
The present invention relates to it is a kind of can automatic identification weight balance weight system and control method, it includes two balance weight lifting oil cylinders for lifting counterweight block lifting, further include being adapted to the oil cylinder hydraulic driving mechanism of connection with described two balance weights lifting oil cylinder and lifting the balance weight controller of hydraulic oil cylinder driving state to balance weight for control cylinder hydraulic drive mechanism, oil pressure sensor of the small intracavitary setting of oil cylinder for detecting the small chamber oil pressure is lifted in any balance weight, the oil pressure sensor is electrically connected with balance weight controller, the small chamber oil pressure detected can be transmitted in balance weight controller by oil pressure sensor.The present invention in the case where not changing existing crane structure, can effective automatic identification counterweight block weight, and the speed of rising and falling of counterweight block can be adjusted, reduce impact, reduction operation difficulty, securely and reliably.
Description
Technical field
The present invention relates to a kind of balance weight system and control method, especially it is a kind of can automatic identification weight balance weight system
System and control method belong to the technical field of crane balance weight.
Background technology
Currently, its position of centre of gravity is O known to hoister in large tonnage model parameterization, pass through the sensing of the installation on crane
Device to principal arm length L, principal arm angle [alpha], luffing pressure F can measure in real time so as to pass through mechanical model, geometry respectively
Relationship calculates practical lift heavy amount M1 and amplitude A, finally obtains the actual torque of weight generation.Ensure that vehicle is not tumbled, it must
The balance weight counterweight M2 of corresponding weight must be placed on the balance weight pedestal positioned at specific amplitude B, it is equal to reach both sides torque；
As shown in Figure 1.
It is known：A=(L*cos α-R)；M1 (from mechanical model, geometrical relationship)；B structure parameter is it is found that R is turntable
Radius belongs to mechanical configuration parameter.If equalising torque has：M2*B=M1*A.
It can be seen that by above formula, amplitude A, amplitude B, practical lift heavy amount M1 can be automatically derived by measuring or calculating at present
Actual value, only the weight M2 of balance weight by user according to combining real-time working condition in performance table, carry out artificial and manual setting, and
After the counterweight of the corresponding weight of installation, the consistency of balance weight actual weight and setting weight is confirmed by user's subjectivity,
Security risk and performance deficiencies below can be brought in this way：
1), user is come in conjunction with practical lifting environment applying working condition according to the performance table provided when current crane job
Select balance weight weight, the foundation as safeguard protection；If user selects mistake to balance weight weight unintentionally or in order to super
It carries and balance weight weight is deliberately selected into wrong (typically bigger than normal), torque is not when this all very likely causes product unloaded or lift heavy
Stablize and tumbles.
2), the balance weight weight parameter in current lifting operation performance of operating condition is unable to automatic identification, record.Current balance weight
This key parameter of weight relies on user and oneself manually selects, confirms that product itself is not true to balance weight weight according to performance table
Reality is calculated, is verified.
By the above it is found that existing balance weight system on the one hand can not automatic identification balance weight weight, cause operation
On the other hand upper risk is also unable to control balance weight and rises and falls speed speed, cause the operation that balance weight is connect with hanging structure
Difficulty is big, and has larger mechanical shock in raising mounting and placement of falling.
Invention content
The purpose of the present invention is overcoming the deficiencies in the prior art, provide it is a kind of can automatic identification weight balance weight
System and control method, it is compact-sized, it, can effective automatic identification balance weight in the case where not changing existing crane structure
The weight of block, and the speed of rising and falling of counterweight block can be adjusted, reduce impact, reduces operation difficulty, securely and reliably.
According to technical solution provided by the invention, it is described can automatic identification weight balance weight system, including two be used for
The balance weight for lifting counterweight block lifting lifts oil cylinder,
Further include being adapted to the oil cylinder hydraulic driving mechanism of connection and for controlling with described two balance weights lifting oil cylinder
Oil cylinder hydraulic driving mechanism lifts balance weight the balance weight controller of hydraulic oil cylinder driving state, the balance weight controller and oil cylinder
Hydraulic drive mechanism is electrically connected, and two balance weights can be driven to lift oil cylinder synchronization lifting by oil cylinder hydraulic driving mechanism and be connected
Counterweight block；
Oil pressure sensor of the small intracavitary setting of oil cylinder for detecting the small chamber oil pressure is lifted in any balance weight, it is described
Oil pressure sensor is electrically connected with balance weight controller, and the small chamber oil pressure detected can be transmitted to balance weight control by oil pressure sensor
In device；
Balance weight controller by oil cylinder hydraulic driving mechanism make balance weight lift the lifting of oil cylinder low speed connected it is flat
When weight block, the small cavity area S of small chamber oil pressure P and the small chamber that balance weight controller is detected according to oil pressure sensor2Energy
Determine the weight of lifting counterweight block, the weight G of the counterweight block is 2*P*S2。
Further include the oil temperature sensor for measuring hydraulic fluid temperature in oil cylinder hydraulic driving mechanism, the oil temperature sensor
It is electrically connected with balance weight controller, the oil temperature for detecting hydraulic oil can be transmitted in balance weight controller by oil temperature sensor, balance
Weight controller can be determined according to the oil temperature variation of hydraulic oil when promoting counterweight block lifts the lifted balance weight of oil cylinder by balance weight
The weight G of the weight of block, counterweight block is：
Wherein, c is oily specific heat (1.7-2.1KJ/ (kg*K)), and t is fluid Current Temperatures, t0It is (silent for fluid original temperature
Think environment temperature), E is system radiating coefficient, and m is oil quality, G0For balance weight radix, k is environment coefficient.
The oil cylinder hydraulic driving mechanism includes for oil suction and switching the pump valve group of oil feeding line and being brought up again with balance
It is in the balanced valve to connect one to one to draw oil cylinder；
The pump valve group includes the big pump of fuel feeding and the small pump of fuel feeding, the suction of the small pump of inlet port, fuel feeding of the big pump of fuel feeding
Hydraulic fluid port is connected with hydraulic tank, the oil outlet of the small pump of oil outlet, fuel feeding of the big pump of fuel feeding respectively with the first three-position four-way valve
T1 mouthfuls, the connection of the P1 mouths of the first three-position four-way valve；The M1 mouths of first three-position four-way valve are connect with the P2 of the second three-position four-way valve mouths,
The M2 mouths of second three-position four-way valve are connect with the oil inlet of diffluence motor；
The C1 mouths of diffluence motor, C2 mouthfuls connect respectively with the oil inlet of corresponding balanced valve, the oil outlet of balanced valve and institute are right
The in-oil cylinder small chamber connection of balance weight lifting should be connected, the control mouth of two balanced valves is lifted with two balance weights in oil cylinders simultaneously
The connection of big chamber, and the control mouth of two balanced valves is connect with the N2 of the second three-position four-way valve mouths.
Further include the linear transducer of the length of oil cylinder for measuring balance weight lift cylinder, the linear transducer with it is flat
Weight controller is electrically connected；
The balance weight controller controls the big pump of fuel feeding, the small pump of fuel feeding according to the length of oil cylinder of linear transducer real-time Transmission
Fuel feeding working condition, with by fuel feeding it is big pump, the small pump of fuel feeding fuel feeding working condition adjustment bring up again draw oil cylinder to balance
The lifting state of pouring weight.
It is parallel with the big pump overflow valve of fuel feeding in the oil outlet of the big pump of the fuel feeding, the oil outlet of the small pump of fuel feeding is parallel with fuel feeding
Small pump overflow valve；The N1 mouths of first three-position four-way valve are connected with hydraulic tank, the T2 mouths and hydraulic oil container of the second three-position four-way valve
Connection.
A kind of balance weight control method of other weight that can be automatic is provided and is brought up again for lifting the balance of counterweight block lifting
Draw oil cylinder, for drive two balance weights lifting oil cylinders synchronize the connected counterweight block of lifting oil cylinder hydraulic driving mechanism and
The balance weight controller of hydraulic oil cylinder driving state is lifted to balance weight for control cylinder hydraulic drive mechanism；The balance weight control
Device is electrically connected with oil cylinder hydraulic driving mechanism；
Oil pressure sensor of the small intracavitary setting of oil cylinder for detecting the small chamber oil pressure is lifted in any balance weight, it is described
Oil pressure sensor is electrically connected with balance weight controller, and the small chamber oil pressure detected can be transmitted to balance weight control by oil pressure sensor
In device；
Balance weight controller by oil cylinder hydraulic driving mechanism make balance weight lift the lifting of oil cylinder low speed connected it is flat
When weight block, the small cavity area S of small chamber oil pressure P and the small chamber that balance weight controller is detected according to oil pressure sensor2Energy
Determine the weight of lifting counterweight block, the weight G of the counterweight block is 2*P*S2。
Further include the oil temperature sensor for measuring hydraulic fluid temperature in oil cylinder hydraulic driving mechanism, the oil temperature sensor
It is electrically connected with balance weight controller, the oil temperature for detecting hydraulic oil can be transmitted in balance weight controller by oil temperature sensor, balance
Weight controller can determine the weight that the lifted counterweight block of oil cylinder is lifted by balance weight according to the oil temperature of hydraulic oil, counterweight block
Weight G is：
Wherein, c is oily specific heat (1.7-2.1KJ/ (kg*K)), and t is fluid Current Temperatures, and t0 is that fluid original temperature is (silent
Think environment temperature), E is system radiating coefficient, and m is oil quality, and G0 is balance weight radix, and k is environment coefficient.
The oil cylinder hydraulic driving mechanism includes for oil suction and switching the pump valve group of oil feeding line and being brought up again with balance
It is in the balanced valve to connect one to one to draw oil cylinder；
The pump valve group includes the big pump of fuel feeding and the small pump of fuel feeding, the suction of the small pump of inlet port, fuel feeding of the big pump of fuel feeding
Hydraulic fluid port is connected with hydraulic tank, the oil outlet of the small pump of oil outlet, fuel feeding of the big pump of fuel feeding respectively with the first three-position four-way valve
T1 mouthfuls, the connection of the P1 mouths of the first three-position four-way valve；The M1 mouths of first three-position four-way valve are connect with the P2 of the second three-position four-way valve mouths,
The M2 mouths of second three-position four-way valve are connect with the oil inlet of diffluence motor；
The C1 mouths of diffluence motor, C2 mouthfuls connect respectively with the oil inlet of corresponding balanced valve, the oil outlet of balanced valve and institute are right
The in-oil cylinder small chamber connection of balance weight lifting should be connected, the control mouth of two balanced valves is lifted with two balance weights in oil cylinders simultaneously
The connection of big chamber, and the control mouth of two balanced valves is connect with the N2 of the second three-position four-way valve mouths.
Further include the linear transducer of the length of oil cylinder for measuring balance weight lift cylinder, the linear transducer with it is flat
Weight controller is electrically connected；
The balance weight controller controls the big pump of fuel feeding, the small pump of fuel feeding according to the length of oil cylinder of linear transducer real-time Transmission
Fuel feeding working condition, with by fuel feeding it is big pump, the small pump of fuel feeding fuel feeding working condition adjustment bring up again draw oil cylinder to balance
The lifting state of pouring weight.
Advantages of the present invention：Small intracavitary by lifting oil cylinder in balance weight installs oil pressure sensor, is sensed according to oil pressure
The small chamber oil pressure of device detection can calculate the weight of the counterweight block under current working, avoid because of operating mode selection, balance weight
The risk that parameter input error is brought；Improve the safety of product operation process.
Coordinated with the first three-position four-way valve, the second three-position four-way valve by the big pump of fuel feeding, the small pump of fuel feeding, can realize different works
The control of the movement velocity of counterweight block under condition reduces the operation difficulty that counterweight block is connect with hanging structure on crane,
And mechanical shock when counterweight block stops is reduced, and the synchronization loop being made up of diffluence motor, balanced valve, it ensures
Two balance weights lift oil cylinder synchronization telescope, improve the reliability of system work.
Description of the drawings
Fig. 1 is crane mechanics geometrical model structural schematic diagram.
Fig. 2 is the schematic diagram that two balance weights of the present invention lift oil cylinder to counterweight block lifting lifting.
Fig. 3 is the structure diagram of the present invention.
Fig. 4 is the schematic diagram of oil cylinder hydraulic driving mechanism of the present invention.
Reference sign：The big pump of 1- hydraulic oil containers, 2- fuel feeding, the small pump of 3- fuel feeding, the big pump overflow valve of 4- fuel feeding, 5- fuel feeding
Small pump overflow valve, the first three-position four-way valves of 6-, the second three-position four-way valves of 7-, 8- diffluence motors, 9- balance weights lifting oil cylinder, 10-
Big chamber, 11- balanced valves, 12- balance weights controller, the small chambers of 13-, 14- counterweight blocks, 15- oil cylinder hydraulics driving mechanism, 16- long
Spend sensor, 17- oil pressure sensors and 18- oil temperature sensors.
Specific implementation mode
With reference to specific drawings and examples, the invention will be further described.
As shown in Figure 2, Figure 3 and Figure 4：When not changing the structure of existing crane, know in order to effectively automatic
The weight of other counterweight block 14, and the speed of rising and falling of counterweight block 14 can be adjusted, operation difficulty is reduced, the present invention includes
Two balance weight lifting oil cylinders 9 for lifting the lifting of counterweight block 14,
Further include being adapted to the oil cylinder hydraulic driving mechanism 15 of connection and for controlling with described two balance weights lifting oil cylinder 9
Liquefaction cylinder hydraulic drive mechanism 15 lifts balance weight the balance weight controller 12 of 9 driving condition of oil cylinder, the balance weight control
Device 12 is electrically connected with oil cylinder hydraulic driving mechanism 15, two balance weights can be driven to lift oil cylinder by oil cylinder hydraulic driving mechanism 15
9 synchronizations lift connected counterweight block 14；
Oil pressure sensor for detecting 13 oil pressure of small chamber is set in the small chamber 13 that any balance weight lifts oil cylinder 9
17, the oil pressure sensor 17 is electrically connected with balance weight controller 12, and oil pressure sensor 17 can pass the small chamber oil pressure detected
It transports in balance weight controller 12；
Balance weight controller 12 is by oil cylinder hydraulic driving mechanism 15 so that balance weight lifts the lifting of 9 low speed of oil cylinder and connected
Counterweight block 14 when, small chamber oil pressure P that balance weight controller 12 is detected according to oil pressure sensor 17 and the small chamber 13
Small cavity area S2It can determine that the weight of lifting counterweight block 14, the weight G of the counterweight block 14 is 2*P*S2。
Specifically, oil cylinders 9 lifted using two balance weights synchronize and lift connected counterweight block 14, so as to will needed for
The counterweight block 14 of weight is articulated on crane, since counterweight block 14 is in class vacant state on crane, nothing
Method carries out automatic identification using existing common weighting manner to the weight of counterweight block 14.
In the embodiment of the present invention, in order to realize that balance weight lifting oil cylinder 9 lifts effective lifting of counterweight block 14, put down
Weight lifting oil cylinder 9 is connect with oil cylinder hydraulic driving mechanism 15, and oil cylinder hydraulic driving mechanism 15 is adapted to balance weight lifting oil cylinder 9
Connection, oil cylinder hydraulic driving mechanism 15 are electrically connected with balance weight controller 12, and balance weight controller 12 can the drive of control cylinder hydraulic pressure
Motivation structure 15 lifts balance weight the driving condition of oil cylinder 9, and oil cylinder hydraulic driving mechanism 15 lifts balance weight the driving of oil cylinder 9
State includes so that balance weight lifting oil cylinder 9 lifts counterweight block 14 and lifts at a high speed or make the balance weight lifting lifting of oil cylinder 9 flat
14 low speed elevation of weight block, oil cylinder hydraulic driving mechanism 15 lift the driving condition of oil cylinder 9 by right in real work to balance weight
The actual requirement of counterweight block 14 determines that specially those skilled in the art says known that details are not described herein again.In addition, balance weight
Existing common controller form may be used in controller 12, or directly uses the controller of existing crane, works as balance weight
When controller 12 is using independent form, the needs of balance weight controller 12 are connect with the controller of crane, so that crane
Controller can obtain the weight of the counterweight block 14 identified by balance weight controller 12, avoid existing being artificially manually entered balance
The problem of 14 weight of pouring weight, is avoided that dangerous caused by wrong input or malice input.
In order to the weight of automatic identification counterweight block 14, the peace in the small chamber 13 that any balance weight lifts oil cylinder 9 is needed
The location status that charge of oil pressure sensor 17, oil pressure sensor 17 and oil pressure sensor 17 are installed in small chamber 13 is this technology
Known to field personnel say, details are not described herein again.The small chamber oil pressure P for acquiring small chamber 13 can be transmitted to balance weight by oil pressure sensor 17
In controller 12.
In the embodiment of the present invention, oil cylinder 9 is lifted when lifting counterweight block 14 using two balance weights, two balances are brought up again
Draw the sum of pulling force of oil cylinder 9 equivalent with the gravity G of counterweight block 14, since counterweight block 14 in lifting lifting process protect by weight
Hold it is constant, balance weight lifting 9 low speed of oil cylinder lifting (high speed lift when, oil cylinder kinetic force of friction is larger, and system back pressure is also larger,
Influence computational accuracy).When the counterweight block 14 connected, the pressure of the big chamber 10 of balance weight lifting oil cylinder 9 can be assumed to be 0,
And after obtaining the small chamber oil pressure P in small chamber 13 by oil pressure sensor 17, in conjunction with the small cavity area S of small chamber 132It can determine that and carry
The weight of counterweight block 14 is drawn, the weight G of the counterweight block 14 is 2*P*S2.In specific works, balance weight lifts oil cylinder 9
After determination, the small cavity area S of small chamber 132It then determines therewith, i.e., small cavity area S2The preset parameter of oil cylinder 9 is lifted for balance weight；This
Outside, two balance weight lifting oil cylinders 9 generally use identical model, two balance weight lifting oil cylinders 9 to synchronize what lifting was connected
Counterweight block 14, therefore in the pulling force (P*S for obtaining a balance weight lifting oil cylinder 92) after, balance weight controller 12 can quickly be known
The weight of other counterweight block 14.
Further, further include oil temperature sensor 18 for measuring hydraulic fluid temperature in oil cylinder hydraulic driving mechanism 15,
The oil temperature sensor 18 is electrically connected with balance weight controller 12, and the oil temperature for detecting hydraulic oil can be transmitted to by oil temperature sensor 18
In balance weight controller 12, balance weight controller 12 can be determined according to the oil temperature of hydraulic oil to be lifted by balance weight lifting oil cylinder 9
The weight G of the weight of counterweight block 14, counterweight block 14 is：
Wherein, c is oily specific heat (1.7-2.1KJ/ (kg*K)), and t is fluid Current Temperatures, t0It is (silent for fluid original temperature
Think environment temperature), E is system radiating coefficient, and m is oil quality, G0For balance weight radix, k is environment coefficient.
It is promoted to the fluid during the top for oil quality m, in particular to by counterweight block 14 from bottom,
During lifting counterweight block 14, the volume change of balance weight lifting oil cylinder 9 is certain, i.e., the volume of required fluid is also
Certain, it is long that quality can lift the corresponding small chamber 13 of oil cylinder 9,10 corresponding area of big chamber and oil cylinder according to balance weight
Degree is calculated, and the specific process for determining oil quality m is that those skilled in the art says known, and details are not described herein again.For matching
Weight weight basis G0It is set according to different cranes, 3-5 times of the maximum weight for loading balance weight, counterweight can be set as
The measurement unit of weight basis G0 is kg.
In the embodiment of the present invention, oil temperature sensor 18 can be installed on oil return line, by measuring liquid in oil return line
The temperature of pressure oil determines oil temperature.For environment coefficient k, -40 DEG C~-20 DEG C, k values 0.98-0.92；- 20 DEG C~0
DEG C, K values 0.92-0.89；0 DEG C~20 DEG C, k values 0.89-0.86,20 DEG C~40 DEG C, k values 0.86-0.84,40 DEG C~60
DEG C, k values 0.84-0.82；60 DEG C~80 DEG C, k values 0.82-0.80.
After the oil temperature detected by using oil temperature sensor 18 determines the weight G of counterweight block 14, energy can be to above-mentioned
The counterweight block 14 determined according to oil pressure sensor 17 is calibrated and is compared, so as to improve the reliable of the identification of counterweight block 14
Property.Certainly, in the specific implementation, oil temperature sensor 18, oil pressure sensor 17 can be utilized to determine counterweight block 14 simultaneously simultaneously
Weight, can also be merely with oil pressure sensor 17 or oil temperature sensor 18 as the foundation for determining 14 weight of counterweight block, tool
Body can be selected as needed, and details are not described herein again.
As shown in figure 3, the oil cylinder hydraulic driving mechanism 15 include for oil suction and switching oil feeding line pump valve group with
And with balance weight lifting oil cylinder 9 in the balanced valve 11 to connect one to one；
The pump valve group includes the big pump 2 of fuel feeding and the small pump 3 of fuel feeding, the small pump of inlet port, the fuel feeding of the big pump of the fuel feeding 23
Inlet port connect with hydraulic oil container 1, fuel feeding it is big pump 2 oil outlet, fuel feeding it is small pump 3 oil outlet respectively with the one or three four
The P1 mouths connection of the T1 mouths, the first three-position four-way valve 6 of port valve 6；The M1 mouths of first three-position four-way valve 6 and the second three-position four-way valve 7
The connection of P2 mouths, the M2 mouths of the second three-position four-way valve 7 connect with the oil inlet of diffluence motor 8；
The C1 mouths of diffluence motor 8, C2 mouthfuls connect respectively with the oil inlet of corresponding balanced valve 11, the oil outlet of balanced valve 11 with
Small chamber 13 in corresponding connection balance weight lifting oil cylinder 9 connects, the control mouths of two balanced valves 11 simultaneously with two balance weights
The big chamber 10 lifted in oil cylinder 9 connects, and the control mouth of two balanced valves 11 is connect with the N2 mouths of the second three-position four-way valve 7.
In the embodiment of the present invention, it is parallel with the big pump overflow valve 4 of fuel feeding in the oil outlet of the big pump of the fuel feeding 2, fuel feeding is small to pump 3
Oil outlet be parallel with the small pump overflow valve of fuel feeding 5；The N1 mouths of first three-position four-way valve 6 are connect with hydraulic oil container 1, the two or three four
The T2 mouths of port valve 7 are connect with hydraulic oil container 1.First three-position four-way valve 6, the second three-position four-way valve 7 are required to control with balance weight
Device 12 is electrically connected, to control corresponding working condition by balance weight controller 12, to realize to the balance weight lifting work shape of oil cylinder 9
The control of state reaches the control to the different jacking conditions of counterweight block 14.In addition, the big pump 2 of fuel feeding, the small pump 3 of fuel feeding, diffluence motor
8 and balanced valve 11 be Hydraulic Elements, below by balance weight lift oil cylinder 9 to the lifting lifting process of counterweight block 14 into
The detailed cooperation explanation of row.
Fuel feeding it is big pump 2 discharge capacity be more than fuel feeding it is small pump 3 discharge capacity, 7 structure of the first three-position four-way valve 6 and the second three-position four-way valve
At a switching valve group, balance weight lifts oil cylinder 9 and is corresponded with each balanced valve 11.In addition, further including for measuring balance
The linear transducer 16 of the length of oil cylinder of oil-lifting jar 9 is brought up again, the linear transducer 16 is electrically connected with balance weight controller 12；
The balance weight controller 12 controls the big pump 2 of fuel feeding according to the length of oil cylinder of 16 real-time Transmission of linear transducer, supplies
Oil it is small pump 3 fuel feeding working condition, with by fuel feeding it is big pump 2, fuel feeding it is small pump 3 fuel feeding working condition adjustment bring up again drawing oil
Lifting state of the cylinder 9 to counterweight block 14.
In the embodiment of the present invention, it includes carrying for counterweight block 14 that balance weight, which lifts oil cylinder 9 and lifts the process of counterweight block 14,
The decline process of the process of liter and counterweight block 14,
1), the lifting process of counterweight block 14：
The Y1a of first three-position four-way valve 6 is obtained electric (working right position), and the Y2b of the second three-position four-way valve 7 obtains electric (rise left position
Effect), big 2 hydraulic oil that pumps out of pump of fuel feeding by the right position of the first three-position four-way valve 6, the second three-position four-way valve 5 left position, point
It flows motor 8, balanced valve 11 to lift in the corresponding small chamber of oil cylinders 9 13 into two balance weights simultaneously, balance weight lifts the work of oil cylinder 9
Stopper rod bounces back so that counterweight block 14 rises.The hydraulic oil that balance weight lifts in the corresponding chamber 10 greatly of oil cylinder 9 passes through the two or three four
Fuel tank is flowed back in 7 left position of port valve.The hydraulic oil of this kind of state, fuel feeding 3 pumpings of small pump is returned by the right bit stream of the first three-position four-way valve 6
Fuel tank, i.e., at this point, when being lifted to counterweight block 14, using the big 2 progress fuel feeding of pump of fuel feeding, counterweight block 14 rises at a high speed, fuel feeding
Small pump 3 is now in unloading condition.
The length of oil cylinder that balance weight lifts oil cylinder 9 is detected by linear transducer 16, balance weight controller 12 is according to balance
Bring up again draw oil cylinder 9 length of oil cylinder judge balance weight lift oil cylinder 9 length of oil cylinder reach precalculated position after, balance weight controller
12 so that the movement velocity of balance weight lifting oil cylinder 9 needs the slack-off hanging mechanisms in order on counterweight block 14 and crane to connect
It connects；The slack-off of movement velocity of balance weight lifting oil cylinder 9 is mainly realized by fuel feeding 3 fuel feeding of small pump.
In fuel feeding 3 fuel feeding of small pump, the Y1b of the first three-position four-way valve 6 obtains electric (working left position), the second three-position four-way valve
7 Y2b is obtained electric (working left position).Small 3 hydraulic oil that pumps out of pump of fuel feeding by 6 left position of the first three-position four-way valve, the two or three
7 left position of four-way valve, diffluence motor 8, the entrance balance weight lifting of balanced valve 11 oil cylinder 9 are accordingly in small chamber 13 so that balance is brought up again
The piston rod retraction of oil cylinder 9, counterweight block 14 is drawn slowly to rise.Balance weight lifts the hydraulic oil warp in the corresponding chamber 10 greatly of oil cylinder 9
It crosses 7 left position of the second three-position four-way valve, flow back in hydraulic oil container 1.Under this kind of state, big 2 hydraulic oil that pumps out of pump of fuel feeding is by the
One three-position four-way valve, 7 left position is flowed back in hydraulic oil container 1.
To sum up, when counterweight block 14 rises at a high speed, using fuel feeding 3 fuel feeding of big pump, balance weight lifts oil cylinder 9 and bounces back, and puts down
Weight block 14 rises at a high speed, the small 3 progress off-load of pump of fuel feeding.During balance weight lifting oil cylinder 9 bounces back, sensed by length
Device 16 come detect balance weight lift oil cylinder 9 position, i.e., balance weight lifting oil cylinder 9 retraction degree, when balance weight lift oil cylinder 9
It soon retracts to bottom not yet on earth (state at the bottom refers to the shortest state of balance weight lifting 9 stroke of oil cylinder), utilizes length
Sensor 16 detects that the real time length of balance weight lifting oil cylinder 9 and balance weight controller 12 judge at balance weight lifting oil cylinder 9
After the shortest state of stroke, it is electric that balance weight controller 12 allows the Y1b of the first three-position four-way valve 6 to obtain, the first three-position four-way valve 6
Y1a dead electricity keeps the Y2b of the second three-position four-way valve 7 to obtain that electricity condition is constant, then can be switched to the oil condition of the small pump of fuel feeding 3, this
When, balance weight lifting oil cylinder 9 still continues to bounce back, but is changed to low speed, and 14 low speed of counterweight block rises, and is sensed when according to length
The length of oil cylinder judgement balance weight lifting oil cylinder 9 that device 16 detects has been when having retracted to bottom, at this time can counterweight block 14 promoted in place,
Balance weight controller 12 makes the Y1a of the first three-position four-way valve 6, the Y1b of the first three-position four-way valve 6, second three-position four-way valve 7
Y2a, the second three-position four-way valve 7 Y2b be in power failure state, the small pump of the big pump 2 of fuel feeding, fuel feeding 3 is in unloading condition.Due to
Low speed promotes counterweight block 14, and in due course fuel cut-off, so the impact of entire crane can be obviously reduced.Meanwhile it utilizing
During this low speed promotes counterweight block 14, balance weight lifts what the oil pressure sensor 17 in the small chamber 13 of oil cylinder 9 detected
Small cavity pressure P carrys out the weight of calculated equilibrium pouring weight 14, balance weight controller 12 as control foundation, realize do not change it is existing
In the case of the forms such as crane structure, effectively realizes and the weight of counterweight block 14 is identified.
2), the decline process of counterweight block 14：
During decline, the last period movement is using quick, at this point, the Y1a of the first three-position four-way valve 6 is obtained, electric (right position acts as
With), the Y2a of the second three-position four-way valve 7 is obtained electric (working right position), and big 2 hydraulic oil that pumps out of pump of fuel feeding passes through the one or three four
6 right position of port valve, the second 3-position 4-way 7 right position, hydraulic oil is sent by balance weight by the control mouth of balanced valve 11 and lifts oil cylinder 9
Big chamber 10 in, balance weight lift oil cylinder 9 stretch out and counterweight block 14 decline；Balance weight lifts the corresponding small chamber of oil cylinder 9 13
Hydraulic oil is returned by the right bit stream of balanced valve 11, diffluence motor 8, the second three-position four-way valve 7 in hydraulic oil container 1.
During decline, oil cylinder 9 is lifted by balance weight so that counterweight block 14 is in descending at slow speed process, convenient for that will put down
Weight block 14 is put on the vehicle frame of crane, at this point, balance weight lifting oil cylinder 9 movement by fuel feeding it is small pump 3 fuel feeding come reality
It is existing.At this point, the Y1b of the first three-position four-way valve 6 is obtained electric (working left position), the Y2a of the second three-position four-way valve 7 obtains electric (rise right position
Effect)；Fuel feeding it is small pump 3 pump out hydraulic oil by 6 left position of the first three-position four-way valve, the right position of the second three-position four-way valve 7, balanced valve
Hydraulic oil is sent into the corresponding big chamber 10 of balance weight lifting oil cylinder 9 by 11 control mouth, and balance weight lifts oil cylinder 9 and stretches out so that balance
Pouring weight 14 declines；Balance weight lifts the hydraulic oil in the corresponding small chamber of oil cylinder 9 13 by balanced valve 11, diffluence motor 8, the 2nd 3
The right bit stream of four-way valve 7 returns in hydraulic oil container 1.
It is synchronized when it is implemented, the first three-position four-way valve 6, the second three-position four-way valve 7, diffluence motor 8, balanced valve 1 are formed
Control system circuit can enable two balance weight lifting oil cylinders 9 to move synchronously.
According to it is above-mentioned can automatic identification weight balance weight system, the balance for the other weight that the present invention can be automatic can be obtained
Weight control method, specially：
There is provided the balance weight lifting oil cylinder 9 for lifting the lifting of counterweight block 14, for driving two balance weight lifting oil
Cylinder 9 synchronizes the oil cylinder hydraulic driving mechanism for lifting connected counterweight block 14 and to be used for control cylinder hydraulic drive mechanism 15 right
Balance weight lifts the balance weight controller 12 of 9 driving condition of oil cylinder；The balance weight controller 12 and oil cylinder hydraulic driving mechanism
15 electrical connections；
Oil pressure sensor for detecting 13 oil pressure of small chamber is set in the small chamber 13 that any balance weight lifts oil cylinder 9
17, the oil pressure sensor 17 is electrically connected with balance weight controller 12, and oil pressure sensor 17 can pass the small chamber oil pressure detected
It transports in balance weight controller 12；
Balance weight controller 12 is by oil cylinder hydraulic driving mechanism 15 so that balance weight lifts the lifting of 9 low speed of oil cylinder and connected
Counterweight block 14 when, small chamber oil pressure P that balance weight controller 12 is detected according to oil pressure sensor 17 and the small chamber 13
Small cavity area S2It can determine that the weight of lifting counterweight block 14, the weight G of the counterweight block 14 is 2*P*S2。
In the embodiment of the present invention, balance weight lifts oil cylinder 9, balance weight controller 12, oil cylinder hydraulic driving mechanism, oil pressure and passes
The specific matching relationship such as sensor 17 can refer to above description, and details are not described herein again.
By installing oil pressure sensor 17 in the small chamber 13 that balance weight lifts oil cylinder 9, detected according to oil pressure sensor 17
Small chamber oil pressure can calculate the weight of the counterweight block 14 under current working, avoid the parameter because of operating mode selection, balance weight
The risk that input error is brought；Improve the safety of product operation process.
Coordinated by the big pump 2 of fuel feeding, small 3 and first three-position four-way valve 6 of pump of fuel feeding, the second three-position four-way valve 7, can be realized not
With the control of the movement velocity of counterweight block under operating mode 14, the behaviour that counterweight block 14 is connect with hanging structure on crane is reduced
Make difficulty, and reduce mechanical shock when counterweight block 14 stops, and is made up of diffluence motor 8, balanced valve 11
Synchronization loop ensures that two balance weights lift 9 synchronization telescope of oil cylinder, improves the reliability of system work.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (9)
1. it is a kind of can automatic identification weight balance weight system, include two for lift counterweight block (14) lifting balance weights
Oil cylinder (9) is lifted, it is characterized in that：
Further include the oil cylinder hydraulic driving mechanism (15) of connection being adapted to described two balance weights lifting oil cylinder (9) and for controlling
Liquefaction cylinder hydraulic drive mechanism (15) lifts balance weight the balance weight controller (12) of oil cylinder (9) driving condition, the balance
Weight controller (12) is electrically connected with oil cylinder hydraulic driving mechanism (15), two can be driven to put down by oil cylinder hydraulic driving mechanism (15)
Weight lifts synchronous the connected counterweight block (14) of lifting of oil cylinder (9)；
Setting is sensed for detecting the oil pressure of small chamber (13) oil pressure in the small chamber (13) of any balance weight lifting oil cylinder (9)
Device (17), the oil pressure sensor (17) be electrically connected with balance weight controller (12), and oil pressure sensor (17) can will be detected
Small chamber oil pressure is transmitted in balance weight controller (12)；
Balance weight controller (12) is by oil cylinder hydraulic driving mechanism (15) so that balance weight lifts the lifting of oil cylinder (9) low speed and connects
When counterweight block (14) connect, small chamber oil pressure P that balance weight controller (12) is detected according to oil pressure sensor (17) and described
The small cavity area S of small chamber (13)2It can determine that the weight of lifting counterweight block (14), the weight G of the counterweight block (14) is 2*
P*S2。
2. it is according to claim 1 can automatic identification weight balance weight system, it is characterized in that：Further include for measuring oil
The oil temperature sensor (18) of cylinder hydraulic drive mechanism (15) interior hydraulic fluid temperature, the oil temperature sensor (18) control with balance weight
Device (12) is electrically connected, and the oil temperature for detecting hydraulic oil can be transmitted in balance weight controller (12) by oil temperature sensor (18), balance
Weight controller (12) can be determined according to the oil temperature variation of hydraulic oil when promoting counterweight block (14) lifts oil cylinder (9) institute by balance weight
The weight of counterweight block (14) is lifted, the weight G of counterweight block (14) is：
Wherein, c is oily specific heat (1.7-2.1KJ/ (kg*K)), and t is fluid Current Temperatures, t0(it is defaulted as ring for fluid original temperature
Border temperature), E is system radiating coefficient, and m is oil quality, G0For balance weight radix, k is environment coefficient.
3. it is according to claim 1 can automatic identification weight balance weight system, it is characterized in that：The oil cylinder hydraulic driving
Mechanism (15) includes for oil suction and switching the pump valve group of oil feeding line and with balance weight lifting oil cylinder (9) in the company of one-to-one correspondence
The balanced valve (11) connect；
The pump valve group includes the big pump (2) of fuel feeding and the small pump (3) of fuel feeding, the small pump of inlet port, fuel feeding of the big pump (2) of fuel feeding
(3) inlet port is connect with hydraulic oil container (1), fuel feeding it is big pump (2) oil outlet, fuel feeding it is small pump (3) oil outlet respectively with
The P1 mouths connection of the T1 mouths, the first three-position four-way valve (6) of first three-position four-way valve (6)；The M1 mouths of first three-position four-way valve (6) with
The P2 mouths of second three-position four-way valve (7) connect, and the M2 mouths of the second three-position four-way valve (7) are connect with the oil inlet of diffluence motor (8)；
The C1 mouths of diffluence motor (8), C2 mouthfuls connect respectively with the oil inlet of corresponding balanced valve (11), the oil outlet of balanced valve (11)
It is connected with the small chamber (13) in corresponding connection balance weight lifting oil cylinder (9), the control mouths of two balanced valves (11) is simultaneously with two
Big chamber (10) connection in a balance weight lifting oil cylinder (9), and the control mouth of two balanced valves (11) with the second 3-position 4-way
The N2 mouths of valve (7) connect.
4. it is according to claim 3 can automatic identification weight balance weight system, it is characterized in that：Further include flat for measuring
The linear transducer (16) of the length of oil cylinder of weight lift cylinder (9), the linear transducer (16) and balance weight controller
(12) it is electrically connected；
The balance weight controller (12) according to the length of oil cylinder of linear transducer (16) real-time Transmission control the big pump (2) of fuel feeding,
The fuel feeding working condition of the small pump (3) of fuel feeding, to pass through the fuel feeding working condition adjustment of the big pump (2) of fuel feeding, the small pump (3) of fuel feeding
Bring up again the lifting state for drawing oil cylinder (9) to counterweight block (14).
5. it is according to claim 3 or 4 can automatic identification weight balance weight system, it is characterized in that：It is big in the fuel feeding
The oil outlet of pump (2) is parallel with the big pump overflow valve (4) of fuel feeding, and the oil outlet of the small pump (3) of fuel feeding is parallel with the small pump overflow valve of fuel feeding
(5)；The N1 mouths of first three-position four-way valve (6) are connect with hydraulic oil container (1), the T2 mouths and hydraulic oil of the second three-position four-way valve (7)
Case (1) connects.
6. a kind of balance weight control method of other weight that can be automatic, characterized in that provide and risen for lifting counterweight block (14)
The balance weight lifting oil cylinder (9) of drop lifts connected counterweight block (14) for driving two balance weight lifting oil cylinders (9) to synchronize
Oil cylinder hydraulic driving mechanism and for control cylinder hydraulic drive mechanism (15) to balance weight lift oil cylinder (9) driving condition
Balance weight controller (12)；The balance weight controller (12) is electrically connected with oil cylinder hydraulic driving mechanism (15)；
Setting is sensed for detecting the oil pressure of small chamber (13) oil pressure in the small chamber (13) of any balance weight lifting oil cylinder (9)
Device (17), the oil pressure sensor (17) be electrically connected with balance weight controller (12), and oil pressure sensor (17) can will be detected
Small chamber oil pressure is transmitted in balance weight controller (12)；
Balance weight controller (12) is by oil cylinder hydraulic driving mechanism (15) so that balance weight lifts the lifting of oil cylinder (9) low speed and connects
When counterweight block (14) connect, small chamber oil pressure P that balance weight controller (12) is detected according to oil pressure sensor (17) and described
The small cavity area S of small chamber (13)2It can determine that the weight of lifting counterweight block (14), the weight G of the counterweight block (14) is 2*
P*S2。
7. the balance weight control method of other weight that according to claim 6 can be automatic, characterized in that further include for measuring
The oil temperature sensor (18) of oil cylinder hydraulic driving mechanism (15) interior hydraulic fluid temperature, the oil temperature sensor (18) and balance weight control
The oil temperature for detecting hydraulic oil can be transmitted in balance weight controller (12), put down by device (12) electrical connection processed, oil temperature sensor (18)
Weight controller (12) can be determined according to the oil temperature of hydraulic oil by the weight of balance weight lifting oil cylinder (9) lifted counterweight block (14)
Amount, the weight G of counterweight block (14) are：
Wherein, c is oily specific heat (1.7-2.1KJ/ (kg*K)), and t is fluid Current Temperatures, t0(it is defaulted as ring for fluid original temperature
Border temperature), E is system radiating coefficient, and m is oil quality, G0For balance weight radix, k is environment coefficient.
8. the balance weight control method of other weight that according to claim 6 can be automatic, characterized in that the oil cylinder hydraulic drives
Motivation structure (15) includes for oil suction and switching the pump valve group of oil feeding line and with balance weight lifting oil cylinder (9) in one-to-one correspondence
The balanced valve (11) of connection；
The pump valve group includes the big pump (2) of fuel feeding and the small pump (3) of fuel feeding, the small pump of inlet port, fuel feeding of the big pump (2) of fuel feeding
(3) inlet port is connect with hydraulic oil container (1), fuel feeding it is big pump (2) oil outlet, fuel feeding it is small pump (3) oil outlet respectively with
The P1 mouths connection of the T1 mouths, the first three-position four-way valve (6) of first three-position four-way valve (6)；The M1 mouths of first three-position four-way valve (6) with
The P2 mouths of second three-position four-way valve (7) connect, and the M2 mouths of the second three-position four-way valve (7) are connect with the oil inlet of diffluence motor (8)；
The C1 mouths of diffluence motor (8), C2 mouthfuls connect respectively with the oil inlet of corresponding balanced valve (11), the oil outlet of balanced valve (11)
It is connected with the small chamber (13) in corresponding connection balance weight lifting oil cylinder (9), the control mouths of two balanced valves (11) is simultaneously with two
Big chamber (10) connection in a balance weight lifting oil cylinder (9), and the control mouth of two balanced valves (11) with the second 3-position 4-way
The N2 mouths of valve (7) connect.
9. according to claim 6 can automatic identification weight balance weight control method, characterized in that further include for measuring
The linear transducer (16) of the length of oil cylinder of balance weight lift cylinder (9), the linear transducer (16) and balance weight controller
(12) it is electrically connected；
The balance weight controller (12) according to the length of oil cylinder of linear transducer (16) real-time Transmission control the big pump (2) of fuel feeding,
The fuel feeding working condition of the small pump (3) of fuel feeding, to pass through the fuel feeding working condition adjustment of the big pump (2) of fuel feeding, the small pump (3) of fuel feeding
Bring up again the lifting state for drawing oil cylinder (9) to counterweight block (14).
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| CN201810607880.7A CN108439219A (en) | 2018-06-13 | 2018-06-13 | Can automatic identification weight balance weight system and control method |
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| CN201810607880.7A CN108439219A (en) | 2018-06-13 | 2018-06-13 | Can automatic identification weight balance weight system and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017729A (en) * | 2019-12-28 | 2020-04-17 | 浦江培咯电子科技有限公司 | Crane capable of adjusting pulling speed according to different weights |
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