CN107200284A - The hydraulic control system and crane of hoisting mechanism - Google Patents
The hydraulic control system and crane of hoisting mechanism Download PDFInfo
- Publication number
- CN107200284A CN107200284A CN201710497531.XA CN201710497531A CN107200284A CN 107200284 A CN107200284 A CN 107200284A CN 201710497531 A CN201710497531 A CN 201710497531A CN 107200284 A CN107200284 A CN 107200284A
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- fluid port
- hydraulic fluid
- valve
- hydraulic
- control valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/28—Other constructional details
- B66D1/40—Control devices
- B66D1/42—Control devices non-automatic
- B66D1/44—Control devices non-automatic pneumatic of hydraulic
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of hydraulic control system of hoisting mechanism and crane.Second oil circuit of the hydraulic control system including hydraulic pump, hoist motor, the first oil circuit of the first actuator port for being connected to hoist motor and the second actuator port for being connected to hoist motor, hoisting mechanism has propradation and falling state, in propradation, the pump discharge of hydraulic pump and the first oil communication and the second oil circuit is connected with oil extraction；Falling state includes open type falling state and flow regeneration falling state, in open type falling state, the pump discharge of hydraulic pump and the second oil communication and the first oil circuit is connected with oil extraction；Regenerate falling state in flow, the pump discharge of hydraulic pump and the first oil circuit with the second oil communication.The hydraulic control system of the hoisting mechanism of the present invention can realize that flow regeneration is fallen to reduce the power of the engine for driving hydraulic pump, so as to effectively reduce oil consumption.
Description
Technical field
The present invention relates to engineering machinery field, the hydraulic control system and crane of more particularly to a kind of hoisting mechanism.
Background technology
The hydraulic control system of crane hoisting generally uses open type hydraulic system structure.Although open type hydraulic system exists
There is the advantages such as control is flexible, control is accurate during forward drive load rising, but when reverse drive is loaded and declined, elevator
Fuel tank is flowed back in the oil return opened of motor.The hydraulic oil for now needing hydraulic pump to provide enough flows falls mouth to hoist motor to be made
The pressure size that weight-drop and motor fall mouth wants sufficiently large and opening balanced valve makes balanced valve be in throttling position.Therefore it is
Ensure that hydraulic pump can export the hydraulic oil of enough flows, engine is also needed to hydraulic system and carried in elevator dropping process
For larger power, therefore oil consumption is larger and causes economy poor.
The content of the invention
It is an object of the invention to provide a kind of hydraulic control system of hoisting mechanism and crane, effectively to reduce oil
Consumption.
First aspect present invention provides a kind of hydraulic control system of hoisting mechanism, including hydraulic pump, for driving elevator
Mechanism work hoist motor, be connected to hoist motor the first actuator port the first oil circuit and be connected to hoist motor
Second oil circuit of the second actuator port, hoisting mechanism has propradation and falling state, in propradation, the pump of hydraulic pump
Outlet is connected with the first oil communication and the second oil circuit with oil extraction；Falling state is included under open type falling state and flow regeneration
Fall state, in open type falling state, the pump discharge of hydraulic pump and the second oil communication and the first oil circuit is connected with oil extraction；In stream
Amount regeneration falling state, the pump discharge of hydraulic pump and the first oil circuit with the second oil communication.
Further, hydraulic control system also includes reversal valve, and reversal valve includes the first hydraulic fluid port, the second hydraulic fluid port, the 3rd oil
Mouth and the 4th hydraulic fluid port, the first hydraulic fluid port of reversal valve and the pump discharge of hydraulic pump are connected, the second hydraulic fluid port and the first oil circuit of reversal valve
Connection, the 3rd hydraulic fluid port of reversal valve is connected with the second oil circuit, and the 4th hydraulic fluid port of reversal valve is connected with oil extraction, and reversal valve is with the
One operating position and the second operating position, in propradation, reversal valve is in the first oil of the first operating position and reversal valve
Mouth is connected with the second hydraulic fluid port of reversal valve, and the 3rd hydraulic fluid port of reversal valve is connected with the 4th hydraulic fluid port of reversal valve；In falling state,
Reversal valve is in the second operating position and the first hydraulic fluid port of reversal valve is connected with the 3rd hydraulic fluid port of reversal valve, and the second of reversal valve
Hydraulic fluid port is connected with the 4th hydraulic fluid port of reversal valve.
Further, hydraulic control system includes state switching control valve, in propradation, state switching control valve control
The first oil circuit is made to connect with the second hydraulic fluid port of reversal valve；In falling state, state switching control valve controls the first oil circuit may be selected
Ground connects with the second hydraulic fluid port of reversal valve or controls hoisting mechanism to be in open type falling state or flow with the second oil communication
Regenerate falling state.
Further, hydraulic control system also includes the 3rd oil circuit being arranged between the first oil circuit and the second oil circuit, shape
State switching control valve includes being arranged at the first on-off valve between the first oil circuit and the second hydraulic fluid port of reversal valve and is arranged at the 3rd
The second on-off valve on oil circuit.
Further, hydraulic control system also includes constant pressure source, the balanced valve being arranged on the first oil circuit and is arranged at flat
Pilot pressure control valve between the leading role chamber and constant pressure source of weighing apparatus valve, in propradation and open type falling state, first pilot
Force control valve controls leading role chamber and the second oil communication；Falling state is reclaimed in flow, the control of pilot pressure control valve is first
Acting chamber is led to connect with constant pressure source.
Further, pilot pressure control valve includes the first control valve, and the first control valve includes the first hydraulic fluid port, the second oil
Mouth and the 3rd hydraulic fluid port, the first hydraulic fluid port of the first control valve are connected with the second oil circuit, and the second hydraulic fluid port and the guide of the first control valve make
Connected with chamber, the 3rd hydraulic fluid port of the first control valve is connected with constant pressure source, the first control valve has the first operating position and the second work
Make position, in propradation and open type falling state, the first control valve is in the first operating position and the first hydraulic fluid port and second
Hydraulic fluid port is connected and the 3rd hydraulic fluid port ends；Falling state is regenerated in flow, the first control valve is in the second operating position and the 3rd oil
Mouth is connected with the second hydraulic fluid port and the first hydraulic fluid port ends.
Further, pilot pressure control valve also includes being arranged between constant pressure source and the 3rd hydraulic fluid port of the first control valve
The second control valve, the second control valve include the first hydraulic fluid port, the second hydraulic fluid port and the 3rd hydraulic fluid port, the first hydraulic fluid port of the second control valve
It is connected with constant pressure source, the second hydraulic fluid port of the second control valve is connected with the 3rd hydraulic fluid port of the first control valve, the oil of the second control valve the 3rd
Mouth is connected with oil extraction, and the second control valve has the first operating position and the second operating position, is fallen in propradation and open type
State, the second control valve is in the 3rd hydraulic fluid port and the second hydraulic fluid port of the second control valve of the first operating position and the second control valve
Connect and the cut-off of its first hydraulic fluid port；Falling state is reclaimed in flow, the second control valve is in the second operating position and the second control
First hydraulic fluid port of valve is connected with its second hydraulic fluid port and its 3rd hydraulic fluid port ends.
Further, the oil liquid pressure of the second hydraulic fluid port of the second control valve is adjustably set with the elder generation of adjustment valve
Lead acting chamber pressure and the orifice size of the throttle orifice of adjustment valve.
Further, hydraulic control system also includes overflow valve, and overflow valve is arranged between the second oil circuit and oil extraction.
Second aspect of the present invention provides a kind of crane, including hoisting mechanism and as any one of first aspect present invention is carried
The hydraulic control system of the hoisting mechanism of confession.
The hydraulic control system and crane of the hoisting mechanism provided based on the present invention, the hydraulic control system of hoisting mechanism
System include hydraulic pump, the hoist motor for driving hoisting mechanism work, be connected to hoist motor the first actuator port the
Second oil circuit of one oil circuit and the second actuator port for being connected to hoist motor, hoisting mechanism has propradation and whereabouts shape
State, in propradation, the pump discharge of hydraulic pump and the first oil communication and the second oil circuit is connected with oil extraction；Falling state includes
Open type falling state and flow regeneration falling state, in open type falling state, the pump discharge of hydraulic pump and the second oil communication and
First oil circuit is connected with oil extraction；Falling state is regenerated in flow, the pump discharge of hydraulic pump and the first oil circuit connect with the second oil circuit
It is logical.The hoisting mechanism of the present invention is when flow regenerates falling state, and the first oil circuit and the second oil communication cause hoist motor
The second actuator port of hoist motor is flowed back in the oil return of first actuator port, realizes that flow regenerates, now hydraulic pump only needs to carry
Repairing is carried out for a less flow, the power of hydraulic pump is reduced, so as to reduce the engine for driving hydraulic pump
Power and effectively reduce oil consumption.
By referring to the drawings to the detailed description of the exemplary embodiment of the present invention, further feature of the invention and
Its advantage will be made apparent from.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the hydraulic control system of the hoisting mechanism of the embodiment of the present invention.
Each reference is represented respectively：
1- hoisting mechanisms；2- hoist motors；3- balanced valves；The control valves of 4- first；The control valves of 5- second；The break-makes of 6- second
Valve；7- the first on-off valve 8- reversal valves；9- check valves；10- overflow valves；13- hydraulic pumps；The actuator ports of A- first；The works of B- second
Make hydraulic fluid port；The oil circuits of X- first；The oil circuits of Y- second；The oil circuits of Z- the 3rd.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Below
Illustrative to the description only actually of at least one exemplary embodiment, never as to the present invention and its application or
Any limitation used.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work
Under the premise of the every other embodiment that is obtained, belong to the scope of protection of the invention.
Unless specifically stated otherwise, the part and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Do not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for the ease of description, each portion shown in accompanying drawing
The size divided not is to be drawn according to actual proportionate relationship.For technology, side known to person of ordinary skill in the relevant
Method and equipment may be not discussed in detail, but in the appropriate case, the technology, method and apparatus, which should be considered as authorizing, to be said
A part for bright book.In shown here and discussion all examples, any occurrence should be construed as merely exemplary
, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：It is similar
Label and letter similar terms is represented in following accompanying drawing, therefore, once being defined in a certain Xiang Yi accompanying drawing, then exist
It need not be further discussed in subsequent accompanying drawing.
For the ease of description, space relative terms can be used herein, such as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation levied.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.If for example, the device in accompanying drawing is squeezed, be described as " at other
It will be positioned as " in other devices or construction after the device of device or construction top " or " on other devices or construction "
Lower section " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... on
Side " and " in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or in its other party
Position), and respective explanations are made to the relative description in space used herein above.
As shown in figure 1, the hydraulic control system of the hoisting mechanism of the embodiment of the present invention includes hydraulic pump 13, for driving
Hoisting mechanism 1 work hoist motor 2, be connected to hoist motor 2 the first actuator port A the first oil circuit X and be connected to volume
Raise the second actuator port B of motor 2 the second oil circuit Y.Hoisting mechanism has propradation and falling state, is rising shape
State, the pump discharge of hydraulic pump 13 is connected with the first oil circuit X and the second oil circuit Y is connected with oil extraction.Falling state falls including open type
State and flow regeneration falling state, in open type falling state, the pump discharge of hydraulic pump 13 is connected and first with the second oil circuit Y
Oil circuit X is connected with oil extraction.Regenerate falling state in flow, the pump discharge of hydraulic pump 13 and the first oil circuit X with the second oil circuit Y
Connection.
The hoisting mechanism of the embodiment of the present invention is when flow regenerates falling state, and the first oil circuit X is connected with the second oil circuit Y
So that the first actuator port of hoist motor 2 (opens), the second actuator port (falling mouth) B of hoist motor 2 is flowed back in A oil return,
Realize that flow regenerates, now hydraulic pump 13 only needs to provide a less flow progress repairing, therefore reduction hydraulic pressure
The output flow of pump, reduces the power of hydraulic pump, so that reduce effectively reduces for driving the power of the engine of hydraulic pump
Oil consumption.
The hydraulic control system of the present embodiment also includes reversal valve 8.Reversal valve 8 includes the first hydraulic fluid port, the second hydraulic fluid port, the
Three hydraulic fluid ports and the 4th hydraulic fluid port.First hydraulic fluid port of reversal valve 8 is connected with the pump discharge of hydraulic pump 13, the second hydraulic fluid port of reversal valve 8 with
First oil circuit X connections, the 3rd hydraulic fluid port of reversal valve 8 is connected with the second oil circuit Y, and the 4th hydraulic fluid port of reversal valve 8 is connected with oil extraction,
Reversal valve 8 has the first operating position and the second operating position, in propradation, and reversal valve 8 is in the first operating position and changed
Second hydraulic fluid port of the first hydraulic fluid port and reversal valve 8 to valve 8 is connected, the 3rd hydraulic fluid port of reversal valve 8 and the 4th hydraulic fluid port of reversal valve 8
Connection.In falling state, reversal valve 8 is in the 3rd oil of the first hydraulic fluid port and reversal valve 8 of the second operating position and reversal valve 8
Mouth connection, the second hydraulic fluid port of reversal valve 8 is connected with the 4th hydraulic fluid port of reversal valve 8.When reversal valve 8 is in the first operating position,
The pump discharge of hydraulic pump is connected with the first oil circuit and the second oil circuit is connected to drive elevator to rise with oil extraction.At reversal valve 8
When the second operating position, the pump discharge of hydraulic pump and the second oil communication and the first oil circuit can with the second oil communication with
It so that hoisting mechanism is in flow and regenerates falling state, can also be connected that hoisting mechanism is fallen in open type with oil extraction
State.
In order that the hoisting mechanism of the present embodiment be able to can be cut between open type falling state and flow regeneration falling state
Set with changing, the hydraulic control system of the present embodiment includes state switching control valve.In propradation, state switching control valve
The first oil circuit is controlled to be connected with the second hydraulic fluid port of reversal valve.In falling state, state switching control valve controls the first oil circuit optional
With selecting connected with the second hydraulic fluid port of reversal valve or controlled with the second oil communication hoisting mechanism be in open type falling state or
Flow regenerates falling state.The setting of state switching control valve allow using the present embodiment crane user according to
The actual demand of oneself is selected.
Specifically in the present embodiment, hydraulic control system also includes being arranged between the first oil circuit X and the second oil circuit Y
3rd oil circuit Z.State switching control valve includes the first break-make being arranged between the first oil circuit X and the second hydraulic fluid port of reversal valve
Valve 7 and the second on-off valve 6 being arranged on the 3rd oil circuit Z.So, it is in control hoisting mechanism under propradation and open type
When falling state, the first on-off valve 7 can be controlled to be in connected state and be off the second on-off valve 6.In control
When hoisting mechanism is in flow regeneration falling state, the first on-off valve 7 can be controlled to be off and make the second on-off valve
6 are in connected state.
In a unshowned embodiment of accompanying drawing, state switching control valve, which can also be, to be arranged on the first oil circuit X
One reversal valve, second oil of the first oil circuit X selectively with reversal valve 8 is controlled by the switching of reversal valve operating position
Mouth or the second oil circuit Y connections.
Due to hoisting mechanism be in flow regenerate falling state when, hydraulic pump pump discharge output fluid flow and
Pressure is smaller and is insufficient to allow balanced valve to open, therefore the balanced valve of the present embodiment is controlled using external control mode.
As shown in figure 1, hydraulic control system also includes constant pressure source P, the balanced valve 3 being arranged on the first oil circuit X and set
Pilot pressure control valve between the leading role chamber and constant pressure source P of balanced valve 3, in propradation and open type falling state,
Pilot pressure control valve controls leading role chamber and the second oil communication.Falling state, pilot pressure control valve are reclaimed in flow
Control leading role chamber is connected with constant pressure source.In propradation and open type falling state, leading role chamber and the second oil circuit
Connection, the specific course of work is as follows：In propradation, the second oil circuit is that oil return line pressure is smaller, therefore balanced valve is in
Zuo Wei, now fluid uniaxially flow to the first actuator port of hoist motor to drive elevator from the second hydraulic fluid port of reversal valve
Rise.In open type falling state, the first oil circuit is oil return line and the second oil circuit is connected with the pump discharge of hydraulic pump, now liquid
The pressure of the fluid of the pump discharge of press pump, which is large enough to open balanced valve, makes balanced valve be in right position (throttling position), now,
The oil return of first actuator port returns to fuel tank by the right position of reversal valve again by throttle orifice.When flow regenerates falling state,
Because the oil liquid pressure of the pump discharge of hydraulic pump is smaller, therefore control pilot pressure control valve makes the elder generation of constant pressure source and balanced valve
Lead acting chamber connection and balanced valve is worked to right position, the now oil return of the first actuator port passes through the 3rd again by throttle orifice
The second on-off valve 6 on oil circuit and flow back into the second actuator port and realize that flow regenerates.
Specifically in the present embodiment, pilot pressure control valve includes the first control valve 4.First control valve 4 includes the first oil
Mouth, the second hydraulic fluid port and the 3rd hydraulic fluid port, the first hydraulic fluid port of the first control valve 4 are connected with the second oil circuit, and the second of the first control valve 4
Hydraulic fluid port is connected with leading role chamber, and the 3rd hydraulic fluid port of the first control valve 4 is connected with constant pressure source P, and the first control valve 4 has first
Operating position and the second operating position, in propradation and open type falling state, the first control valve 4 is in the first operating position
And first hydraulic fluid port connected with the second hydraulic fluid port and the 3rd hydraulic fluid port end；Falling state is regenerated in flow, the first control valve 4 is in the
Two operating positions and the 3rd hydraulic fluid port are connected with the second hydraulic fluid port and the first hydraulic fluid port ends.
Pilot pressure control valve also includes the second control being arranged between constant pressure source and the 3rd hydraulic fluid port of the first control valve
Valve 5, the second control valve 5 includes the first hydraulic fluid port, the second hydraulic fluid port and the 3rd hydraulic fluid port, the first hydraulic fluid port and constant pressure source of the second control valve
Connection, the second hydraulic fluid port of the second control valve is connected with the 3rd hydraulic fluid port of the first control valve, the hydraulic fluid port of the second control valve the 3rd and oil extraction
Connection, the second control valve has the first operating position and the second operating position, in propradation and open type falling state, second
The 3rd hydraulic fluid port that control valve is in the first operating position and the second control valve connected with the second hydraulic fluid port of the second control valve and its
One hydraulic fluid port ends；Falling state is reclaimed in flow, the second control valve is in the first oil of the second operating position and the second control valve
Mouth is connected with its second hydraulic fluid port and its 3rd hydraulic fluid port ends.
The present embodiment by setting the first control valve 4 and the second control valve 5 and being used cooperatively to control constant pressure source
Break-make between the leading role chamber of balanced valve, so as to realize internal control mode and the switching of external control mode of balanced valve.
Preferably, the oil liquid pressure of the second hydraulic fluid port of the second control valve 5 is adjustably set with the guide of adjustment valve
The pressure of acting chamber and the orifice size of the throttle orifice of adjustment valve.For example, the second control valve can be proportion magnetic valve,
By adjust proportion magnetic valve electric current size come the orifice size of the throttle orifice of adjustment valve, and then adjust under weight
The speed of drop.
Preferably, hydraulic control system also includes overflow valve 10.Overflow valve is arranged between the second oil circuit and oil extraction.Overflow
The pressure of second oil circuit of the stream limitation hoist motor of valve 10 makes the second oil circuit keep a less pressure, and system is reduced with this
Oil consumption.
Preferably, the hydraulic control system of the present embodiment also includes the check valve 9 being arranged in parallel with overflow valve 10.When
When two on-off valves 5 are in connected state, the setting of check valve 9 prevents the first oil circuit as the direct oil extraction of fluid during oil return line.
The course of work of the hydraulic control system of the present embodiment is described below in detail：
Hoisting mechanism is in propradation：
Open type hydraulic system loop, hoist motor 2 are constituted by hydraulic pump 13, reversal valve 8, balanced valve 3 and hoist motor 2
Oil return is connected directly to fuel tank, and driving force is provided by engine, drives winding lifting.13 turns of engine rotating band hydrodynamic press pump
It is dynamic, provide a system to hydraulic oil, reversal valve 8 is in the first operating position (left position), hydraulic oil by the left position of reversal valve 8,
First on-off valve 7 simultaneously reaches hoist motor 2 by balanced valve 3, drives hoist motor 2 to rotate, so as to drive winding lifting weight
Thing.The direct oil return box in left position of reversal valve 8 is passed through in the oil return of hoist motor 2.
The falling state of hoisting mechanism can be selected by user oneself, and flow can be selected to regenerate falling state, also may be used
To select open type falling state.
Hoisting mechanism is in flow and regenerates falling state：
When elevator falls, acquiescence is driven using flow regeneration.During whereabouts, the first control valve 4 of control is in down
Position, the second control valve 5 of control is in left position, then constant pressure source P fluid is entered by the second control valve 5 and the first control valve 4
The leading role chamber of balanced valve 3, so as to push balanced valve open, makes balanced valve be operated in right position.At the same time, reversal valve 8 is in
Right position, the pressure oil of hydraulic pump 9 can be entered in the second oil circuit Y by the right position of reversal valve 8, that is, elevator falls the oil of side
Road, gives side to carry out repairing.Now, the potential energy that elevator falls can drive hoist motor 2 to be rotated, what hoist motor 2 was discharged
Hydraulic oil is after the expenditure and pressure of balanced valve 3, and presence and the second on-off valve 6 due to check valve 9 are in connected state, hydraulic pressure
Oil can flow to the second actuator port of hoist motor 2 by the 3rd oil circuit Z and the second oil circuit Y, and now overflow valve 10 can limit volume
The pressure for the second oil circuit raised makes the second oil circuit keep a less pressure to reduce the oil consumption of system.When elevator falls, liquid
It is system repairing by reversal valve 8 that press pump, which will be set to a less discharge capacity there is provided a low discharge,.
In elevator dropping process, crane controller can be according to the angle of crane control handle, output current signal
The output pressure of the second control valve 5, and then the reverse orifice size of adjustment valve are controlled, the decrease speed control of weight is realized
System.
Hoisting mechanism is in open type falling state：
When user needs to carry out special operation condition operation, for example, need to hurtle down, open type whereabouts pattern may be selected.Now,
Reversal valve 8 is controlled to be in right position, the first on-off valve 7 is in connected state, and the hydraulic oil of hydraulic pump 13 can enter by reversal valve 8
Enter the second actuator port B to hoist motor, at the same the second control valve 4 be in it is upper, hydraulic oil can pass through the second control valve 4
The upper first guide cavity for reaching balanced valve push balanced valve open, make weight-drop.
The hydraulic control system of the present embodiment compared with open type falling state, subtracts when regenerating falling state in flow
Small hoist motor falls a mouthful pressure, and then reduces the oil-out pressure of hydraulic pump, and is dropped by way of flow regenerates
The low output flow of hydraulic pump, it is therefore desirable to the power reduction of engine output, and then reduce system fuel consumption.And
The hydraulic control system of the present embodiment reduces mouthful pressure that falls of hoist motor, and then reduces the chock pressure difference of balanced valve,
The caloric value of system is reduced, the service life of Hydraulic Elements is extended.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this
The spirit of inventive technique scheme, it all should cover among claimed technical scheme scope of the invention.
Claims (10)
1. a kind of hydraulic control system of hoisting mechanism, it is characterised in that including hydraulic pump (13), for driving hoisting mechanism
(1) work hoist motor (2), be connected to the hoist motor (2) the first actuator port (A) the first oil circuit (X) and even
Be connected to the second oil circuit (Y) of the second actuator port (B) of the hoist motor (2), the hoisting mechanism have propradation and
Falling state, in the propradation, the pump discharge of the hydraulic pump (13) is connected and described second with first oil circuit (X)
Oil circuit (Y) is connected with oil extraction；The falling state includes open type falling state and flow regeneration falling state, under the open type
Fall state, the pump discharge of the hydraulic pump (13) is connected with second oil circuit (Y) and first oil circuit (X) connects with oil extraction
It is logical；Falling state is regenerated in the flow, and the pump discharge and first oil circuit (X) of the hydraulic pump (13) are with described second
Oil circuit (Y) is connected.
2. the hydraulic control system of hoisting mechanism according to claim 1, it is characterised in that the hydraulic control system is also
Including reversal valve (8), the reversal valve (8) includes the first hydraulic fluid port, the second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port, the commutation
First hydraulic fluid port of valve (8) is connected with the pump discharge of the hydraulic pump, the second hydraulic fluid port and first oil circuit of the reversal valve (8)
Connection, the 3rd hydraulic fluid port of the reversal valve (8) is connected with second oil circuit, the 4th hydraulic fluid port of the reversal valve (8) and oil extraction
Connection, the reversal valve has the first operating position and the second operating position, and in the propradation, the reversal valve is in institute
State the first operating position and the first hydraulic fluid port of the reversal valve is connected with the second hydraulic fluid port of the reversal valve, the of the reversal valve
Three hydraulic fluid ports are connected with the 4th hydraulic fluid port of the reversal valve；In the falling state, the reversal valve is in second working position
Put and the first hydraulic fluid port of the reversal valve connected with the 3rd hydraulic fluid port of the reversal valve, the second hydraulic fluid port of the reversal valve with it is described
The 4th hydraulic fluid port connection of reversal valve.
3. the hydraulic control system of hoisting mechanism according to claim 2, it is characterised in that the hydraulic control system bag
State switching control valve is included, in the propradation, the state switching control valve controls first oil circuit and the commutation
The second hydraulic fluid port connection of valve；In the falling state, the state switching control valve control first oil circuit selectively with
Second hydraulic fluid port of the reversal valve connects or controls the hoisting mechanism to be in open type whereabouts shape with second oil communication
State or flow regeneration falling state.
4. the hydraulic control system of hoisting mechanism according to claim 3, it is characterised in that the hydraulic control system is also
Including the 3rd oil circuit (Z) being arranged between first oil circuit (X) and second oil circuit (Y), the state switching control
Valve includes being arranged at the first on-off valve (7) between first oil circuit (X) and the second hydraulic fluid port of the reversal valve and being arranged at
The second on-off valve (6) on 3rd oil circuit (Z).
5. the hydraulic control system of hoisting mechanism according to any one of claim 1 to 4, it is characterised in that the liquid
Pressure control system also includes constant pressure source (P), the balanced valve (3) being arranged on first oil circuit (X) and is arranged at the balance
Pilot pressure control valve between the leading role chamber and the constant pressure source (P) of valve (3), in the propradation and the open type
Falling state, the pilot pressure control valve controls the leading role chamber and second oil communication；Returned in the flow
Falling state is received, the pilot pressure control valve controls the leading role chamber to be connected with the constant pressure source.
6. the hydraulic control system of hoisting mechanism according to claim 5, it is characterised in that the pilot pressure control valve
Including the first control valve (4), first control valve (4) includes the first hydraulic fluid port, the second hydraulic fluid port and the 3rd hydraulic fluid port, first control
First hydraulic fluid port of valve (4) processed is connected with second oil circuit, the second hydraulic fluid port and the leading role of first control valve (4)
Chamber is connected, and the 3rd hydraulic fluid port of first control valve (4) is connected with the constant pressure source (P), and first control valve (4) is with the
One operating position and the second operating position, in the propradation and the open type falling state, the first control valve (4) place
Connected in first operating position and first hydraulic fluid port with second hydraulic fluid port and the 3rd hydraulic fluid port ends；In the stream
Amount regeneration falling state, first control valve (4) is in the second operating position and the 3rd hydraulic fluid port and second hydraulic fluid port
Connect and first hydraulic fluid port cut-off.
7. the hydraulic control system of hoisting mechanism according to claim 6, it is characterised in that the pilot pressure control valve
Also include the second control valve (5) being arranged between the 3rd hydraulic fluid port of the constant pressure source and first control valve, described second
Control valve (5) includes the first hydraulic fluid port, the second hydraulic fluid port and the 3rd hydraulic fluid port, and the first hydraulic fluid port and the constant pressure source of second control valve connect
Connect, the second hydraulic fluid port of second control valve is connected with the 3rd hydraulic fluid port of first control valve, second control valve the 3rd
Hydraulic fluid port is connected with oil extraction, and second control valve has the first operating position and the second operating position, in the propradation and
The open type falling state, second control valve is in the 3rd hydraulic fluid port of first operating position and second control valve
Connected with the second hydraulic fluid port of second control valve and the cut-off of its first hydraulic fluid port；Falling state, described the are reclaimed in the flow
Two control valves are in the second operating position and the first hydraulic fluid port of second control valve is connected and its 3rd oil with its second hydraulic fluid port
Mouth cut-off.
8. the hydraulic control system of hoisting mechanism according to claim 7, it is characterised in that second control valve (5)
The oil liquid pressure of the second hydraulic fluid port adjustably set and adjust described with the pressure for the leading role chamber for adjusting the balanced valve
The orifice size of the throttle orifice of balanced valve.
9. the hydraulic control system of hoisting mechanism according to any one of claim 1 to 4, it is characterised in that the liquid
Pressure control system also includes overflow valve (10), and the overflow valve is arranged between second oil circuit and oil extraction.
10. a kind of crane, it is characterised in that including elevator structure and hoist engine as claimed in any one of claims 1-9 wherein
The hydraulic control system of structure.
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| CN201710497531.XA CN107200284B (en) | 2017-06-27 | 2017-06-27 | The hydraulic control system and crane of hoisting mechanism |
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| CN201710497531.XA CN107200284B (en) | 2017-06-27 | 2017-06-27 | The hydraulic control system and crane of hoisting mechanism |
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| CN107200284A true CN107200284A (en) | 2017-09-26 |
| CN107200284B CN107200284B (en) | 2019-05-21 |
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Cited By (3)
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| CN111994811A (en) * | 2020-08-03 | 2020-11-27 | 中国铁建重工集团股份有限公司 | Hydraulic control system and engineering vehicle |
| US20210115949A1 (en) * | 2019-10-16 | 2021-04-22 | Caterpillar Inc. | Hydraulic system for a work machine having a hydraulic winch |
| CN115434961A (en) * | 2022-09-06 | 2022-12-06 | 邵阳维克液压股份有限公司 | Hoist formula headstock gear loses electric urgent floodgate device and headstock gear that falls |
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| CN115434961B (en) * | 2022-09-06 | 2023-12-29 | 邵阳维克液压股份有限公司 | Hoist formula headstock gear power failure emergency brake device and headstock gear |
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