CN106762924A - A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system - Google Patents
A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system Download PDFInfo
- Publication number
- CN106762924A CN106762924A CN201710049533.2A CN201710049533A CN106762924A CN 106762924 A CN106762924 A CN 106762924A CN 201710049533 A CN201710049533 A CN 201710049533A CN 106762924 A CN106762924 A CN 106762924A
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- hydraulic fluid
- fluid port
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- hydraulic
- oil
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- 230000003139 buffering effect Effects 0.000 title claims abstract description 62
- 239000012530 fluid Substances 0.000 claims abstract description 162
- 239000003921 oil Substances 0.000 claims description 121
- 238000009530 blood pressure measurement Methods 0.000 claims description 25
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 239000000872 buffer Substances 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 3
- 238000011176 pooling Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
- F15B13/0431—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the electrical control resulting in an on-off function
-
- 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
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/84—Slewing gear
- B66C23/86—Slewing gear hydraulically actuated
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
- F15B13/0433—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being pressure control valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system, rotary buffering valve includes buffering valve body, and buffering valve body has two hydraulic fluid port A, and hydraulic fluid port C and hydraulic fluid port D；Being set in trimmer valve body can be subject to the main valve plug of guide oil control, with with the electric proportional pressure control valve that can be opened according to main hydraulic fluid pressure, the oil inlet of electric proportional pressure control valve is connected with hydraulic fluid port C and hydraulic fluid port D respectively by the oil-feed oil duct that two-way is provided with line check valve, and its oil-out is connected with hydraulic fluid port C and hydraulic fluid port D respectively by the fuel-displaced oil duct that two-way is provided with oil outlet one-way valve.Beneficial effects of the present invention：Not only meet the requirement of electric control handle crane functions, moreover it is possible to meet the requirement of hydraulic control handle crane functions；Controller can also be made to decide whether to start revolution buffering according to pilot pressure signal or leader current signal, so as to realize that the revolution under different operating modes is buffered by the setting of electric proportional pressure control valve different pressures value.
Description
Technical field
The invention belongs to technical field of engineering machinery, and in particular to a kind of rotary buffering valve, hydraulic control revolution buffering guide's control
System processed and electro-hydraulic dual-purpose revolution buffering pilot control system.
Background technology
Current crane rotation trimmer valve realizes commutation, buffering, repairing and the free rotary function of crane rotation, revolution
Start/stop impact problem is crane rotation system subject matter, typically now using pilot-operated type definite value overflow valve setting revolution buffering
Value, when start/stop impact pressure reaches the value, precursor overflow valve is opened, and realizes the connection that motor is imported and exported, so as to realize buffering
Function, usual revolution buffer value setting is larger to meet relatively large load operating mode needs, but is set when load pressure can not reach this
During definite value, then revolution buffering can not be realized, start/stop impact fluctuation is larger.
Hydraulic control pilot circuit being used rotary buffering valve, with two end caps, pilot pressure is controlled by hydraulic control handle more, it is real
The commutation control of existing revolving valve, revolution pooling feature realizes that load pressure is applied to guide's overflow simultaneously using definite value overflow valve
Valve two ends, when load pressure exceedes overflow valve guide's setting value, form fluid flowing, and pressure difference is formed at overflow valve two ends, main
Overflow valve is opened, and realizes that motor two-port is connected, and realizes pooling feature.
The defect of this control mode is：Revolving valve two end cap pilot control and oil return are external by extra oil pipe, even
Connect complexity；Pilot control and oil return opening only are provided with end cap one end, the applicability installed is reduced；Automatically controlled end cap only realizes automatically controlled hand
Handle function, hydraulic control end cap only realizes hydraulic control handle function, it is automatically controlled can not be general with the whole machine of hydraulic control；There is no guide's pressure obtaning device, no
The further control of revolution can be realized；Revolution pooling feature uses definite value overflow valve, and the overflow value is used under different operating modes, when
Revolution buffering is just opened when load pressure is higher, start/stop impact fluctuation is larger.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, there is provided a kind of rotary buffering valve, hydraulic control revolution buffering
Pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system, not only meet the requirement of electric control handle crane functions, also
The requirement of hydraulic control handle crane functions can be met；Controller can also be made to determine according to pilot pressure signal or leader current signal
Whether startup revolution is buffered, so as to realize that the revolution under different operating modes is delayed by the setting of electric proportional pressure control valve different pressures value
Punching.
To solve prior art problem, the invention discloses a kind of rotary buffering valve, including buffering valve body, buffering valve body tool
There is the hydraulic fluid port P for connecting drum pump, for the hydraulic fluid port T of working connection oil return, and be respectively used to connection hydraulic motor both sides oil
The hydraulic fluid port C and hydraulic fluid port D of mouth；Buffering valve body also has two hydraulic fluid port A for being used to be respectively communicated with pilot control, is set in trimmer valve body
There is the main valve plug that under guide oil effect main hydraulic oil can be made to enter in hydraulic motor through hydraulic fluid port C or hydraulic fluid port D, and being capable of basis
Main hydraulic fluid pressure and the electric proportional pressure control valve opened；The oil inlet of electric proportional pressure control valve is provided with line check valve by two-way
Oil-feed oil duct connected with hydraulic fluid port C and hydraulic fluid port D respectively, its oil-out is provided with the fuel-displaced oil duct point of oil outlet one-way valve by two-way
Do not connected with hydraulic fluid port C and hydraulic fluid port D.
The invention also discloses a kind of hydraulic control revolution buffering pilot control system, including：Hydraulic motor, foregoing revolution is delayed
Rush valve, pressure sensor, and controller；Pressure sensor can detect guide's oil pressure, and its output end is defeated with controller
Enter end electrical connection, the output end of controller is electrically connected with the input of electric proportional pressure control valve.
The invention also discloses the electro-hydraulic dual-purpose revolution buffering pilot control system of one kind, in electric control handle or hydraulic control hand
Handle control is lower to realize that revolution is buffered, including：Hydraulic motor, foregoing rotary buffering valve, pressure sensor, controller, and two
Individual leading controller；
Leading controller includes：Guide valve blocks and the electric proportional pressure-reducing valve being arranged in guide valve blocks；Have on guide valve blocks
Hydraulic fluid port P2 and hydraulic fluid port a, also has hydraulic fluid port P1 and hydraulic fluid port L at least one guide valve blocks；The oil inlet of electric proportional pressure-reducing valve and oil
Mouth P1 connections, its oil-out is connected with hydraulic fluid port a, and its oil return opening is connected with hydraulic fluid port L；Buffer valve body two hydraulic fluid port A respectively with elder generation
The hydraulic fluid port a connections of pilot valve body；At the first operating position, its oil inlet is connected electric proportional pressure-reducing valve with its oil-out；Second
During operating position, its oil-out is connected with oil return opening；
The input of controller and electric proportional pressure-reducing valve is used to connect the output end of electric control handle, and output end and the electricity of controller compare
The input electrical connection of example overflow valve.
Further, guide valve blocks also have pressure measurement hydraulic fluid port, and pressure measurement hydraulic fluid port is connected with hydraulic fluid port a；It is provided with trimmer valve body
Shuttle valve, the both sides hydraulic fluid port of shuttle valve is connected with two pressure measurement hydraulic fluid ports respectively；Pressure sensor is arranged in the fuel-displaced oil duct of shuttle valve.
Further, guide valve blocks are respectively provided with hydraulic fluid port P1 and hydraulic fluid port L.
Further, hydraulic fluid port P1 and hydraulic fluid port L respectively to be arranged in guide valve blocks and buffering valve body in corresponding oil duct connect
It is logical.
Further, guide valve blocks are connected to the two ends of buffering valve body by bolt.
Further, it is provided with hydraulic damping on the oil duct between hydraulic fluid port P2 and hydraulic fluid port a.
The device have the advantages that：Not only meet the requirement of electric control handle crane functions, moreover it is possible to meet hydraulic control handle
Crane functions requirement；Controller can also be made to decide whether that starting revolution delays according to pilot pressure signal or leader current signal
Punching, so as to realize that the revolution under different operating modes is buffered by the setting of electric proportional pressure control valve different pressures value.
Brief description of the drawings
Fig. 1 is the principle schematic of a preferred embodiment of the invention；
Fig. 2 is the front view of the first leading controller in embodiment illustrated in fig. 1；
Fig. 3 is the rearview of the first leading controller in embodiment illustrated in fig. 1；
Fig. 4 is the left view of the first leading controller in embodiment illustrated in fig. 1；
Fig. 5 is the sectional view of the first pressure measurement hydraulic fluid port of the first leading controller in embodiment illustrated in fig. 1；
Fig. 6 is the sectional view of the hydraulic fluid port L1 of the first leading controller in embodiment illustrated in fig. 1；
Fig. 7 is the sectional view of the hydraulic fluid port Pa1 of the first leading controller in embodiment illustrated in fig. 1；
Fig. 8 is the sectional view of the hydraulic fluid port Pa2 of the first leading controller in embodiment illustrated in fig. 1；
Fig. 9 is the front view of the second leading controller in embodiment illustrated in fig. 1；
Figure 10 is the right view of the second leading controller in embodiment illustrated in fig. 1；
Figure 11 is the rearview of the second leading controller in embodiment illustrated in fig. 1；
Figure 12 is the sectional view of the second pressure measurement hydraulic fluid port of the second leading controller in embodiment illustrated in fig. 1；
Figure 13 is the sectional view of the hydraulic fluid port L2 of the second leading controller in embodiment illustrated in fig. 1；
Figure 14 is the sectional view of the hydraulic fluid port Pb1 of the second leading controller in embodiment illustrated in fig. 1
Figure 15 is the sectional view of the hydraulic fluid port Pb2 of the second leading controller in embodiment illustrated in fig. 1.
Reference：
1 first electric proportional pressure-reducing valve；2 hydraulic dampings；3 shuttle valves；4 main valve plugs；5 electric proportional pressure control valves；6 pressure sensors；7 controls
Device；8 hydraulic motors；9 second electric proportional pressure-reducing valves；10 first guide's pressure measurement oil ducts；11 first automatically controlled pilot control oil ducts；12
One oil return oil duct；13 second guide's pressure measurement oil ducts；14 second automatically controlled pilot control oil ducts；15 second oil return oil ducts；16 trimmer valves
Body；17 in line check valves；18 oil outlet one-way valves.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in Fig. 1 to 15, a kind of electro-hydraulic dual-purpose revolution buffering pilot control system, in electric control handle or hydraulic control hand
Handle control is lower to realize revolution buffering.
The system includes：Hydraulic motor 8, rotary buffering valve, pressure sensor 6, controller 7, and two pilot controls
Device.
Rotary buffering valve includes buffering valve body 16, and buffering valve body 16 has the hydraulic fluid port P for connecting main hydraulic oil, for returning
Oil hydraulic fluid port T, hydraulic fluid port C and hydraulic fluid port D for connecting the both sides hydraulic fluid port of hydraulic motor 8, and two be used for connect pilot control
Hydraulic fluid port A.
Shuttle valve 3, main valve plug 4 and electric proportional pressure control valve 5 are set in buffering valve body 16.The oil inlet of electric proportional pressure control valve 5 leads to
Cross two-way and be provided with the oil-feed oil duct of in line check valve and connected with hydraulic fluid port C and hydraulic fluid port D respectively, its oil-out is provided with by two-way
The fuel-displaced oil duct of oil outlet one-way valve is connected with hydraulic fluid port C and hydraulic fluid port D respectively.The effect of main valve plug is main hydraulic oil is commutated, specifically
Ground, main valve plug can be moved in the presence of the guide oil entered through hydraulic fluid port A so that main hydraulic oil enters through hydraulic fluid port C or hydraulic fluid port D
In entering hydraulic motor.
The oil inlet of electric proportional pressure control valve by two-way be provided with the oil-feed oil duct of in line check valve 17 respectively with hydraulic fluid port C and
Hydraulic fluid port D is connected, and its oil-out is connected with hydraulic fluid port C and hydraulic fluid port D respectively by the fuel-displaced oil duct that two-way is provided with oil outlet one-way valve 18.
Leading controller includes：Guide valve blocks and the electric proportional pressure-reducing valve being arranged in guide valve blocks.Guide valve blocks have
There are hydraulic fluid port P1, hydraulic fluid port P2, hydraulic fluid port L, hydraulic fluid port a and pressure measurement hydraulic fluid port, guide valve blocks are connected by bolt with buffering valve body 16.
The oil inlet of electric proportional pressure-reducing valve is connected with hydraulic fluid port P1, and its oil-out is connected with hydraulic fluid port a, its oil return opening and hydraulic fluid port L
Connection.Two hydraulic fluid port A for buffering valve body 16 are connected with the hydraulic fluid port a of each guide valve blocks respectively；Electric proportional pressure-reducing valve is in the first work
When making position, its oil inlet is connected with its oil-out；At the second operating position, its oil-out is connected with oil return opening.
The both sides hydraulic fluid port of shuttle valve 3 is connected with the pressure measurement hydraulic fluid port on two guide valve blocks respectively.Between hydraulic fluid port P2 and hydraulic fluid port a
Hydraulic damping 2 is provided with oil duct.Hydraulic fluid port P1 and hydraulic fluid port L on two guide valve blocks respectively by being arranged in guide valve blocks and
Corresponding oil duct or outside corresponding oil pipe in buffering valve body 16 form connection.
Pressure sensor 6 is arranged in the fuel-displaced oil duct of shuttle valve 3, and the output end of pressure sensor 6 connects the defeated of controller 7
Enter end, controller 7 connects the output end of electric control handle, output end and the electricity ratio of controller 7 with the input of electric proportional pressure-reducing valve
The input connection of example overflow valve 5.
As shown in figure 1, for the ease of description, the leading controller on the left of rotary buffering valve is designated as into the first pilot control
Device, the electric proportional pressure-reducing valve in it is the first electric proportional pressure-reducing valve 1, and the hydraulic fluid port P1 on its guide valve blocks is designated as hydraulic fluid port Pa1, uses
In external automatically controlled pilot control.Hydraulic fluid port P2 is designated as hydraulic fluid port Pa2, for external hydraulic control pilot control.Hydraulic fluid port L is designated as hydraulic fluid port L1, uses
In oil return.Hydraulic fluid port a is designated as hydraulic fluid port a1, realizes that guide oil acts on main valve plug 4 for connecting hydraulic fluid port A.Pressure measurement hydraulic fluid port is designated as first
Pressure measurement hydraulic fluid port.The guide valve blocks of the side have the first oil return oil duct 12 connected with hydraulic fluid port L1, the first electricity connected with hydraulic fluid port Pa1
Control pilot control oil duct 11, the first hydraulic control pilot control oil duct connected with hydraulic fluid port Pa2, and connected with the first pressure measurement hydraulic fluid port
First guide's pressure measurement oil duct.First hydraulic control pilot control oil duct is also connected so that a part of hydraulic control with first guide's pressure measurement oil duct
Pilot control can enter in shuttle valve 3 through first guide's pressure measurement oil duct.
Similarly, the leading controller on the right side of rotary buffering valve is designated as the second leading controller, the electric ratio in it
Pressure-reducing valve is the second electric proportional pressure-reducing valve 9, and the hydraulic fluid port P1 on its guide valve blocks is designated as hydraulic fluid port Pb1, for external automatically controlled guide oil
Source.Hydraulic fluid port P2 is designated as hydraulic fluid port Pb2, for external hydraulic control pilot control.Hydraulic fluid port L is designated as hydraulic fluid port L2, for oil return draining.Hydraulic fluid port a
Hydraulic fluid port a2 is designated as, realizes that guide oil acts on main valve plug 4 for connecting hydraulic fluid port B.Pressure measurement hydraulic fluid port is designated as the second pressure measurement hydraulic fluid port.The side
Guide valve blocks there is the second oil return oil duct 15 for connect with hydraulic fluid port L2, the automatically controlled pilot control of second connected with hydraulic fluid port Pb1 is oily
Road 14, the second hydraulic control pilot control oil duct connected with hydraulic fluid port Pb2, and the second guide's pressure measurement connected with the second pressure measurement hydraulic fluid port
Oil duct 13.Second hydraulic control pilot control oil duct is also connected with second guide's pressure measurement oil duct 13 so that two part hydraulic control pilot controls
Can enter in shuttle valve 3 through second guide's pressure measurement oil duct 13.
First automatically controlled pilot control oil duct 11 is by buffering the oil duct in valve body 16 and the second automatically controlled pilot control oil duct 14
So that hydraulic fluid port Pa1 is connected with hydraulic fluid port Pb1, realization is from any one side joint electric control handle pilot control for connection.First oil return oil duct
12 are connected by buffering the oil duct in valve body 16 with the second oil return oil duct 15 so that hydraulic fluid port L1 is connected with hydraulic fluid port L2, are realized from appointing
The meaning direct oil return in side.
Operation principle of the invention and process
Revolution cushioning control is carried out using electric control handle
As shown in figure 1, by taking the hydraulic fluid port Pb1 of the second leading controller and hydraulic fluid port L2 closure as an example：Hydraulic fluid port Pa1 leads to guide oil, leads to
Toward the first electric proportional pressure-reducing valve 1, the guide oil is simultaneously automatically controlled by the first automatically controlled pilot control oil duct 11, valve body oil duct and second
Pilot control oil duct 14 leads to the second electric proportional pressure-reducing valve 9.Depressurized when there is electric control handle current signal to be applied to the first electric ratio
During valve 1, pressure-reducing valve is in the first operating position, and the second electric proportional pressure-reducing valve 9 is in the second operating position, the first pressure-reducing valve valve
Control pressure acts on the left end of main valve plug 4 afterwards makes it move right, because main valve plug is moved so as to be originally present in
Hydraulic oil in second guide device passes sequentially through the second electric proportional pressure-reducing valve 9, the second oil return oil duct 15, valve body oil duct and first
Oil return oil duct 12 leads to hydraulic fluid port L1, realizes oil return.
When electric control handle is quickly turned on and off, electric control handle current signal is delivered to controller 7, the basis of controller 7
The current signal judges whether to need to set the oil pressure relief of electric proportional pressure control valve.If necessary to set then further root
Set according to actual condition, will otherwise be given tacit consent to initial oil pressure relief.When the end pressure of hydraulic motor 8 one reaches the electric proportional overflow
During the setting value of valve 5, overflow valve is opened, and main hydraulic oil enters by line check valve, electric proportional pressure control valve 5 and oil outlet one-way valve
Hydraulic motor connects the two ends of hydraulic motor 8, realizes revolution buffering.
When the second electric proportional pressure-reducing valve 9 electric must be in the first operating position, and the first electric proportional pressure-reducing valve 1 is in the second work
When making position, guide oil is by the first automatically controlled pilot control oil duct into being applied to main valve plug 4 after the second electric proportional pressure-reducing valve 9
Right-hand member realize commutation, and the guide oil in the first guide device in the presence of the left end of main valve plug 4 from the direct oil returns of hydraulic fluid port L1, delay
Rush principle similar to the above.When the hydraulic fluid port Pa1 and hydraulic fluid port L1 of the first leading controller are blocked, control principle and above-mentioned class
Seemingly, thus repeat no more.
Revolution cushioning control is carried out using hydraulic control handle
The hydraulic fluid port Pb1 of the hydraulic fluid port Pa1, hydraulic fluid port L1 and the second leading controller of the first leading controller, hydraulic fluid port L2 are blocked.
So that hydraulic control handle is applied to hydraulic fluid port Pa2 as an example, the pressure of guide oil is applied directly to master by the first hydraulic control pilot control oil duct
The left end of valve element 4 moves to right it, and the hydraulic oil in the second guide device is directly over the second liquid under the right-hand member effect of main valve plug 4
Control handle pilot control oil duct to hydraulic fluid port Pb2 oil returns.
Quickly opened when hydraulic control handle or during quick closedown, guide oil via first guide's pressure measurement oil duct, valve body oil duct simultaneously
Selected through shuttle valve 3 and the collection pressure signal of pressure sensor 6, be then passed to controller 7, controller 7 is according to this pilot pressure
Judge whether to need to set the oil pressure relief of electric proportional pressure control valve.If necessary to setting then further according to actual condition
Set, will otherwise be given tacit consent to initial oil pressure relief.When the end pressure of hydraulic motor 8 one reaches the setting value, hydraulic oil passes through
Check valve realizes that the both sides hydraulic fluid port of hydraulic motor 8 is connected with overflow valve, realizes revolution buffering.When hydraulic control handle is applied to hydraulic fluid port Pb2
When, control principle is similar to the above, therefore no longer repeats.
In the present invention, pilot pressure signal acquisition mode also can be without valve body, and individually designed valve block is realized.Two ends guide
Oil sources and oil return opening can also be connected by external oil pipe, not by valve inner oil duct.The system not only meets electric control handle and rises
Heavy-duty machine functional requirement, moreover it is possible to meet the requirement of hydraulic control handle crane functions；Pilot control and oil return can connect any one elder generation
Control device is led, the applicability of leading controller has been widened significantly；Can also by pilot pressure signal or leader current signal,
Controller is made to decide whether to start revolution buffering, so that different operating modes are realized in the setting by electric proportional pressure control valve different pressures value
Under revolution buffering.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of the technology of the present invention principle is not departed from, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of rotary buffering valve, including buffering valve body, the buffering valve body has the hydraulic fluid port P for connecting drum pump, is used for
The hydraulic fluid port T of working connection oil return, and it is respectively used to connect the hydraulic fluid port C and hydraulic fluid port D of hydraulic motor both sides hydraulic fluid port, it is characterised in that：
The buffering valve body also has two hydraulic fluid port A for being used to be respectively communicated with pilot control, is provided with the trimmer valve body
The main valve plug for making main hydraulic oil enter in hydraulic motor through hydraulic fluid port C or hydraulic fluid port D under guide oil effect, and can be according to main hydraulic oil
Pressure and the electric proportional pressure control valve opened；The oil inlet of the electric proportional pressure control valve is provided with entering in line check valve by two-way
Oil duct is connected with hydraulic fluid port C and hydraulic fluid port D respectively, its oil-out by two-way be provided with the fuel-displaced oil duct of oil outlet one-way valve respectively with
The hydraulic fluid port C is connected with hydraulic fluid port D.
2. a kind of hydraulic control revolution buffering pilot control system, including hydraulic motor, it is characterised in that：Also include：Such as claim 1
A kind of described rotary buffering valve, pressure sensor, and controller；The pressure sensor can detect guide's oil pressure,
Its output end is electrically connected with the input of the controller, the input of the output end of the controller and the electric proportional pressure control valve
End electrical connection.
3. a kind of electro-hydraulic dual-purpose revolution buffers pilot control system, for realizing revolution under electric control handle or the control of hydraulic control handle
Buffering, including hydraulic motor, it is characterised in that：Also include：A kind of rotary buffering valve as claimed in claim 1, pressure sensing
Device, controller, and two leading controllers；
The leading controller includes：Guide valve blocks and the electric proportional pressure-reducing valve being arranged in the guide valve blocks；The elder generation
There is hydraulic fluid port P2 and hydraulic fluid port a on pilot valve body, also there is hydraulic fluid port P1 and hydraulic fluid port L at least one guide valve blocks；The electric ratio subtracts
The oil inlet of pressure valve is connected with the hydraulic fluid port P1, and its oil-out is connected with the hydraulic fluid port a, and its oil return opening is connected with the hydraulic fluid port L；
Two hydraulic fluid port A of the buffering valve body are connected with the hydraulic fluid port a of the guide valve blocks respectively；The electric proportional pressure-reducing valve is in the first work
When making position, its oil inlet is connected with its oil-out；At the second operating position, its oil-out is connected with oil return opening；
The input of the controller and the electric proportional pressure-reducing valve is used to connect the output end of electric control handle, the controller
Output end is electrically connected with the input of the electric proportional pressure control valve.
4. the electro-hydraulic dual-purpose revolution of one kind according to claim 3 buffers pilot control system, it is characterised in that：The guide
Valve body also has pressure measurement hydraulic fluid port, and the pressure measurement hydraulic fluid port is connected with the hydraulic fluid port a；Shuttle valve is provided with the trimmer valve body, it is described
The both sides hydraulic fluid port of shuttle valve is connected with two pressure measurement hydraulic fluid ports respectively；The pressure sensor is arranged at the fuel-displaced oil duct of the shuttle valve
In.
5. the electro-hydraulic dual-purpose revolution of one kind according to claim 3 buffers pilot control system, it is characterised in that：The guide
Valve body is respectively provided with the hydraulic fluid port P1 and hydraulic fluid port L.
6. the electro-hydraulic dual-purpose revolution of one kind according to claim 5 buffers pilot control system, it is characterised in that：Hydraulic fluid port P1 and
Hydraulic fluid port L is connected to the corresponding oil duct being arranged in the guide valve blocks and in the trimmer valve body respectively.
7. the electro-hydraulic dual-purpose revolution of one kind according to claim 3 buffers pilot control system, it is characterised in that：The guide
Valve body is connected to the two ends of the buffering valve body by bolt.
8. the electro-hydraulic dual-purpose revolution of one kind according to claim 3 buffers pilot control system, it is characterised in that：The hydraulic fluid port
Hydraulic damping is provided with oil duct between P2 and the hydraulic fluid port a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049533.2A CN106762924B (en) | 2017-01-23 | 2017-01-23 | A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710049533.2A CN106762924B (en) | 2017-01-23 | 2017-01-23 | A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106762924A true CN106762924A (en) | 2017-05-31 |
| CN106762924B CN106762924B (en) | 2018-10-16 |
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Citations (7)
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| JP2001247293A (en) * | 2000-03-07 | 2001-09-11 | Hitachi Constr Mach Co Ltd | Hydraulic winch circuit for crane |
| CN1350126A (en) * | 2001-12-10 | 2002-05-22 | 卢永松 | Rotary buffering valve |
| CN102336370A (en) * | 2010-07-26 | 2012-02-01 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and its control method |
| CN102912823A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Rotary energy saving system of excavator |
| CN103628512A (en) * | 2013-11-15 | 2014-03-12 | 中外合资沃得重工（中国）有限公司 | Rotary hydraulic control device of excavator movable arm platform and control method |
| CN103883575A (en) * | 2012-12-21 | 2014-06-25 | 三一重工股份有限公司 | Rotary cushion valve, rotary hydraulic system and engineering machine |
| CN206478052U (en) * | 2017-01-23 | 2017-09-08 | 徐工集团工程机械有限公司 | A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system |
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2017
- 2017-01-23 CN CN201710049533.2A patent/CN106762924B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001247293A (en) * | 2000-03-07 | 2001-09-11 | Hitachi Constr Mach Co Ltd | Hydraulic winch circuit for crane |
| CN1350126A (en) * | 2001-12-10 | 2002-05-22 | 卢永松 | Rotary buffering valve |
| CN102336370A (en) * | 2010-07-26 | 2012-02-01 | 徐州重型机械有限公司 | Rotating hydraulic system of crane and its control method |
| CN102912823A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Rotary energy saving system of excavator |
| CN103883575A (en) * | 2012-12-21 | 2014-06-25 | 三一重工股份有限公司 | Rotary cushion valve, rotary hydraulic system and engineering machine |
| CN103628512A (en) * | 2013-11-15 | 2014-03-12 | 中外合资沃得重工（中国）有限公司 | Rotary hydraulic control device of excavator movable arm platform and control method |
| CN206478052U (en) * | 2017-01-23 | 2017-09-08 | 徐工集团工程机械有限公司 | A kind of rotary buffering valve, hydraulic control revolution buffering pilot control system and electro-hydraulic dual-purpose revolution buffering pilot control system |
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|---|---|
| CN106762924B (en) | 2018-10-16 |
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