CN107200284B - The hydraulic control system and crane of hoisting mechanism - Google Patents
The hydraulic control system and crane of hoisting mechanism Download PDFInfo
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- CN107200284B CN107200284B CN201710497531.XA CN201710497531A CN107200284B CN 107200284 B CN107200284 B CN 107200284B CN 201710497531 A CN201710497531 A CN 201710497531A CN 107200284 B CN107200284 B CN 107200284B
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- fluid port
- hydraulic fluid
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- hydraulic
- control valve
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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 cranes.Hydraulic control system include hydraulic pump, hoist motor, be connected to hoist motor the first actuator port the first oil circuit and be connected to hoist motor the second actuator port the second oil circuit, hoisting mechanism has propradation and falling state, in propradation, the pump discharge of hydraulic pump is with the first oil communication and the second oil circuit is connect with oil extraction；Falling state includes open type falling state and flow regeneration falling state, and in open type falling state, the pump discharge of hydraulic pump is with the second oil communication and the first oil circuit is connected to 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 hoisting mechanism of the invention may be implemented flow regeneration and fall to reduce the power for driving the engine of hydraulic pump, so that oil consumption be effectively reduced.
Description
Technical field
The present invention relates to engineering machinery field, in particular to the hydraulic control system and crane of a kind of hoisting mechanism.
Background technique
The hydraulic control system of crane hoisting generallys use open type hydraulic system structure.Although open type hydraulic system is just
To driving load rise when have control flexibly, control precisely etc. advantages, but be driven in the reverse direction load decline when, hoist motor
The oil return to open flow back to fuel tank.The hydraulic oil for needing hydraulic pump to provide enough flows at this time falls mouth to hoist motor and makes under weight
Fall and motor fall mouth pressure size want sufficiently large and open balanced valve make balanced valve be in throttling position.Therefore, in order to ensure that hydraulic
Pump can export the hydraulic oil of enough flows, and engine is also needed to hydraulic system and provides biggish function in elevator dropping process
Rate, therefore oil consumption is larger and causes economy poor.
Summary of the invention
The purpose of the present invention is to provide a kind of hydraulic control system of hoisting mechanism and cranes, oil is effectively reduced
Consumption.
First aspect present invention provides a kind of hydraulic control system of hoisting mechanism, including hydraulic pump, for driving elevator
The hoist motor of mechanism work, be connected to hoist motor the first actuator port the first oil circuit and be connected to the of hoist motor
Second oil circuit of two actuator ports, hoisting mechanism has propradation and falling state, in propradation, the pump discharge of hydraulic pump
With the first oil communication and the second oil circuit is connect with oil extraction；Falling state includes open type falling state and flow regeneration whereabouts shape
State, in open type falling state, the pump discharge of hydraulic pump is with the second oil communication and the first oil circuit is connected to oil extraction；It is regenerated in flow
Falling state, the pump discharge of hydraulic pump and the first oil circuit with the second oil communication.
Further, hydraulic control system further includes reversal valve, and reversal valve includes the first hydraulic fluid port, the second hydraulic fluid port, third oil
Mouth and the 4th hydraulic fluid port, the first hydraulic fluid port of reversal valve and the pump discharge of hydraulic pump connect, the second hydraulic fluid port and the first oil circuit of reversal valve
Connection, the third hydraulic fluid port and the second oil circuit connection of reversal valve, the 4th hydraulic fluid port of reversal valve are connect with oil extraction, and reversal valve has first
Operating position and the second operating position, in propradation, reversal valve be in the first operating position and the first hydraulic fluid port of reversal valve with
Second hydraulic fluid port of reversal valve is connected to, and the third hydraulic fluid port of reversal valve is connected to the 4th hydraulic fluid port of reversal valve；In falling state, reversal valve
The first hydraulic fluid port in the second operating position and reversal valve is connected to the third hydraulic fluid port of reversal valve, the second hydraulic fluid port of reversal valve with change
It is connected to the 4th hydraulic fluid port of valve.
Further, hydraulic control system includes state switching control valve, in propradation, the control of state switching control valve
First oil circuit is connected to the second hydraulic fluid port of reversal valve；In falling state, state switching control valve controls the first oil circuit selectively
It is connected to the second hydraulic fluid port of reversal valve or controls hoisting mechanism with the second oil communication and be in open type falling state or flow again
Raw falling state.
Further, hydraulic control system further includes the third oil circuit being set between the first oil circuit and the second oil circuit, shape
State switching control valve includes the first on-off valve being set between the first oil circuit and the second hydraulic fluid port of reversal valve and is set to third
The second on-off valve on oil circuit.
Further, hydraulic control system further includes constant pressure source, the balanced valve being set on the first oil circuit and is set to 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 recycled in flow, the control of pilot pressure control valve is first
Acting chamber is led to be connected to 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 hydraulic fluid port
With third hydraulic fluid port, the first hydraulic fluid port and the second oil circuit connection of the first control valve, the second hydraulic fluid port and leading role of the first control valve
Chamber connection, the third hydraulic fluid port of the first control valve are connect with constant pressure source, and the first control valve has the first operating position and the second work
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 the second hydraulic fluid port
It is connected to and the cut-off of third hydraulic fluid port；Regenerate falling state in flow, the first control valve be in the second operating position and third hydraulic fluid port and
Second hydraulic fluid port is connected to and the first hydraulic fluid port ends.
Further, pilot pressure control valve further includes being set between constant pressure source and the third hydraulic fluid port of the first control valve
Second control valve, the second control valve include the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, the first hydraulic fluid port and perseverance of the second control valve
Potential source connection, the second hydraulic fluid port of the second control valve connect with the third hydraulic fluid port of the first control valve, the second control valve third hydraulic fluid port 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, the
Two control valves are in the first operating position and the third hydraulic fluid port of the second control valve is connected to and it with the second hydraulic fluid port of the second control valve
The cut-off of first hydraulic fluid port；Falling state is recycled in flow, the second control valve is in the first of the second operating position and the second control valve
Hydraulic fluid port is connected to its second hydraulic fluid port and its third hydraulic fluid port ends.
Further, the oil liquid pressure of the second hydraulic fluid port of the second control valve is adjustably arranged with the guide of adjustment valve
The pressure of acting chamber and the orifice size of the throttle orifice of adjustment valve.
Further, hydraulic control system further includes overflow valve, and overflow valve is set between the second oil circuit and oil extraction.
Second aspect of the present invention provides a kind of crane, including hoisting mechanism and any one of such as first aspect present invention provide
Hoisting mechanism hydraulic control system.
Hydraulic control system and crane based on hoisting mechanism provided by the invention, the hydraulic control system of hoisting mechanism
Including hydraulic pump, for drive hoisting mechanism work hoist motor, be connected to hoist motor the first actuator port first
Second oil circuit of oil circuit and the second actuator port for being connected to hoist motor, hoisting mechanism have propradation and falling state,
In propradation, the pump discharge of hydraulic pump is with the first oil communication and the second oil circuit is connect with oil extraction；Falling state includes open type
Falling state and flow regenerate falling state, in open type falling state, the pump discharge of hydraulic pump and the second oil communication and first
Oil circuit is connected to oil extraction；Regenerate falling state in flow, the pump discharge of hydraulic pump and the first oil circuit with the second oil communication.This
For the hoisting mechanism of invention when flow regenerates falling state, the first oil circuit and the second oil communication make the first work of hoist motor
The second actuator port of hoist motor is flowed back in the oil return for making hydraulic fluid port, realizes flow regeneration, hydraulic pump only needs to provide one at this time
Lesser flow carries out repairing, the power of hydraulic pump is reduced, to reduce the power for driving the engine of hydraulic pump
And oil consumption is effectively reduced.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the structural schematic diagram of the hydraulic control system of the hoisting mechanism of the embodiment of the present invention.
Each appended drawing reference respectively represents:
1- hoisting mechanism；2- hoist motor；3- balanced valve；The first control valve of 4-；The second control valve of 5-；The second on-off of 6-
Valve；7- the first on-off valve 8- reversal valve；9- check valve；10- overflow valve；13- hydraulic pump；The first actuator port of A-；The second work of B-
Make hydraulic fluid port；The first oil circuit of X-；The second oil circuit of Y-；Z- third oil circuit.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Below
Description only actually at least one exemplary embodiment be it is illustrative, never as to the present invention and its application or make
Any restrictions.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
It is not limited the scope of the invention up to formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each portion shown in attached drawing
The size divided not is to draw 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, and the technology, method and apparatus should be considered as authorizing explanation
A part of book.In shown here and discussion all examples, any occurrence should be construed as merely illustratively, and
Not by way of limitation.Therefore, the other examples of exemplary embodiment can have different values.It should also be noted that similar label
Similar terms are indicated in following attached drawing with letter, therefore, once it is defined in a certain Xiang Yi attached drawing, then subsequent attached
It does not need that it is further discussed in figure.
For ease of description, spatially relative term can be used herein, 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 of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, being described as if the device in attached drawing is squeezed " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also be positioned with other different modes and (is rotated by 90 ° or in other orientation), and
And respective explanations are made to the opposite 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 volume
Raise 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 elevator
The second oil circuit Y of second actuator port B of motor 2.Hoisting mechanism has propradation and falling state, in propradation, liquid
The pump discharge of press pump 13 is connected to the first oil circuit X and the second oil circuit Y is connect with oil extraction.Falling state include open type falling state and
Flow regenerate falling state, in open type falling state, the pump discharge of hydraulic pump 13 be connected to the second oil circuit Y and the first oil circuit X and
Oil extraction connection.Falling state is regenerated in flow, the pump discharge of hydraulic pump 13 and the first oil circuit X are connected to the second oil circuit Y.
When flow regenerates falling state, the first oil circuit X is connected to the second oil circuit Y to be made the hoisting mechanism of the embodiment of the present invention
The second actuator port (falling mouth) B of hoist motor 2 is flowed back in (open) oil return of A of the first actuator port of hoist motor 2, realize
Flow regeneration, hydraulic pump 13 only needs to provide a lesser flow progress repairing at this time, therefore reduces the defeated of hydraulic pump
Outflow reduces the power of hydraulic pump, and oil consumption is effectively reduced for driving the power of the engine of hydraulic pump to reduce.
The hydraulic control system of the present embodiment further includes reversal valve 8.Reversal valve 8 includes the first hydraulic fluid port, the second hydraulic fluid port, third
Hydraulic fluid port and the 4th hydraulic fluid port.First hydraulic fluid port of reversal valve 8 is connect with the pump discharge of hydraulic pump 13, the second hydraulic fluid port of reversal valve 8 and
One oil circuit X connection, the third hydraulic fluid port of reversal valve 8 are connect with the second oil circuit Y, and the 4th hydraulic fluid port of reversal valve 8 is connect with oil extraction, commutation
Valve 8 has the first operating position and the second operating position, and in propradation, reversal valve 8 is in the first operating position and reversal valve 8
The first hydraulic fluid port be connected to the second hydraulic fluid port of reversal valve 8, the third hydraulic fluid port of reversal valve 8 is connected to the 4th hydraulic fluid port of reversal valve 8.?
Falling state, reversal valve 8 is in the second operating position and the first hydraulic fluid port of reversal valve 8 is connected to the third hydraulic fluid port of reversal valve 8, changes
4th hydraulic fluid port of the second hydraulic fluid port and reversal valve 8 to valve 8 is connected to.When reversal valve 8 is in the first operating position, the pump of hydraulic pump
Outlet is with the first oil circuit connection and the second oil circuit connect that elevator is driven to rise with oil extraction.When reversal valve 8 is in the second work
When position, the pump discharge of hydraulic pump and the second oil communication and the first oil circuit can be with the second oil communication so that hoisting mechanism
Falling state is regenerated in flow, it can also be with oil extraction connection so that hoisting mechanism is in open type falling state.
In order to cut the hoisting mechanism of the present embodiment can between open type falling state and flow regeneration falling state
It is arranged with changing, the hydraulic control system of the present embodiment includes state switching control valve.In propradation, state switching control valve control
The first oil circuit is made to be connected to the second hydraulic fluid port of reversal valve.In falling state, state switching control valve controls the first oil circuit and may be selected
Ground is connected to the second hydraulic fluid port of reversal valve or controls with the second oil communication hoisting mechanism and is in open type falling state or flow
Regenerate falling state.The setting of state switching control valve allow the user using the crane of the present embodiment according to oneself
Actual demand is selected.
Specifically in the present embodiment, hydraulic control system further includes the be set between the first oil circuit X and the second oil circuit Y
Three oil circuits Z.State switching control valve includes the first on-off valve 7 being set between the first oil circuit X and the second hydraulic fluid port of reversal valve
With the second on-off valve 6 being set on third oil circuit Z.So, propradation and open type whereabouts shape are in control hoisting mechanism
When state, it can control the first on-off valve 7 and be in connected state and be in an off state the second on-off valve 6.In control hoist engine
When structure is in flow regeneration falling state, it can control the first on-off valve 7 and be in an off state and be in the second on-off valve 6 and connect
Logical state.
In a unshowned embodiment of attached drawing, state switching control valve, which can also be, to be set on the first oil circuit X
One reversal valve, by reversal valve operating position switching come control the first oil circuit X selectively with the second hydraulic fluid port of reversal valve 8
Or second oil circuit Y connection.
Due to hoisting mechanism be in flow regeneration falling state when, hydraulic pump pump discharge output oil liquid flow and pressure
Power is smaller and balanced valve is insufficient to allow to open, therefore the balanced valve of the present embodiment is controlled using external control mode.
As shown in Figure 1, hydraulic control system further includes constant pressure source P, the balanced valve 3 being set on the first oil circuit X and setting
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 recycled in flow
Control leading role chamber is connected to constant pressure source.In propradation and open type falling state, leading role chamber and the second oil circuit connect
Logical, 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 a left side
Position, oil liquid flows to the first actuator port of hoist motor from the second hydraulic fluid port of reversal valve uniaxially to drive on elevator at this time
It rises.In open type falling state, the first oil circuit is oil return line and the second oil circuit is connected to the pump discharge of hydraulic pump, at this time hydraulic pump
The pressure of oil liquid of pump discharge be large enough to can to open balanced valve balanced valve made to be in right position (throttling position), at this point, first
The oil return of actuator port returns to fuel tank using the right position of reversal valve by throttle orifice.When flow regenerates falling state, due to
The oil liquid pressure of the pump discharge of hydraulic pump is smaller, therefore control pilot pressure control valve makes the leading role of constant pressure source and balanced valve
Chamber is connected to and balanced valve is made to work to right position, and the oil return of the first actuator port at this time is by throttle orifice using on third oil circuit
Second on-off valve 6 and flow back into the second actuator port realize flow regeneration.
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 third hydraulic fluid port, the first hydraulic fluid port and the second oil circuit connection of the first control valve 4, the second oil of the first control valve 4
Mouth is connect with leading role chamber, and the third hydraulic fluid port of the first control valve 4 is connect with constant pressure source P, and the first control valve 4 has the first work
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 is connected to the second hydraulic fluid port and third hydraulic fluid port ends；Falling state is regenerated in flow, the first control valve 4 is in the second working position
It sets and third hydraulic fluid port is connected to the second hydraulic fluid port and the cut-off of the first hydraulic fluid port.
Pilot pressure control valve further includes the second control being set between constant pressure source and the third hydraulic fluid port of the first control valve
Valve 5, the second control valve 5 include the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, and the first hydraulic fluid port and constant pressure source of the second control valve connect
It connects, the second hydraulic fluid port of the second control valve is connect with the third hydraulic fluid port of the first control valve, and the second control valve third hydraulic fluid port and oil extraction connect
It connects, the second control valve has the first operating position and the second operating position, in propradation and open type falling state, the second control
Valve is in the first operating position and the third hydraulic fluid port of the second control valve is connected to the second hydraulic fluid port of the second control valve and its first oil
Mouth cut-off；Recycle falling state in flow, the second control valve be in the second operating position and the first hydraulic fluid port of the second control valve and
Its second hydraulic fluid port is connected to and its third hydraulic fluid port ends.
The present embodiment by the first control valve 4 of setting and the second control valve 5 and be used cooperatively to control constant pressure source
On-off between the leading role chamber of balanced valve, to realize the 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 arranged 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, lead to
Overregulate the electric current of proportion magnetic valve size come adjustment valve throttle orifice orifice size, and then adjust weight decline
Speed.
Preferably, hydraulic control system further includes overflow valve 10.Overflow valve is set between the second oil circuit and oil extraction.Overflow
The pressure that valve 10 limits the second oil circuit of hoist motor makes the second oil circuit keep a lesser pressure, and the oil of system is reduced with this
Consumption.
Preferably, the hydraulic control system of the present embodiment further includes the check valve 9 being arranged in parallel with overflow valve 10.When second
When on-off valve 6 is in connected state, oil liquid direct oil extraction when the setting of check valve 9 prevents the first oil circuit as 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 circuit is formed by hydraulic pump 13, reversal valve 8, balanced valve 3 and hoist motor 2, hoist motor 2 returns
Oil is connected directly to fuel tank, provides driving force by engine, drives winding lifting.Engine rotation drives hydraulic pump 13 to rotate,
Provide a system to hydraulic oil, reversal valve 8 is in the first operating position (left position), and hydraulic oil passes through the left position of reversal valve 8, first logical
Disconnected valve 7 simultaneously reaches hoist motor 2 by balanced valve 3, drives hoist motor 2 to rotate, to drive winding lifting weight.Elevator horse
Pass through the direct oil return box in left position of reversal valve 8 up to 2 oil returns.
The falling state of hoisting mechanism can be selected by user oneself, can choose flow regeneration falling state, can also
To select open type falling state.
Hoisting mechanism is in flow regeneration falling state:
When elevator falls, default is driven using flow regeneration.When whereabouts, the first control valve 4 of control is in down
Position, the second control valve 5 of control are in left position, then the oil liquid of constant pressure source P is entered by the second control valve 5 and the first control valve 4
The leading role chamber of balanced valve 3 makes balanced valve work in right position to push balanced valve open.At the same time, reversal valve 8 is in the right side
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 circuit of side,
Repairing is carried out to side is fallen.At this point, the potential energy that elevator falls will drive hoist motor 2 and be rotated, the high pressure that hoist motor 2 is discharged
For oil after 3 expenditure and pressure of balanced valve, presence and the second on-off valve 6 due to check valve 9 are in connected state, and hydraulic oil can be through
It crosses third oil circuit Z and the second oil circuit Y flow to the second actuator port of hoist motor 2, overflow valve 10 will limit the of elevator at this time
The pressure of two oil circuits makes the second oil circuit keep a lesser pressure to reduce the oil consumption of system.When elevator falls, hydraulic pump will
It is set to a lesser discharge capacity, providing a small flow by reversal valve 8 is system repairing.
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 reversed orifice size of adjustment valve are controlled, realizes the decrease speed control of weight
System.
Hoisting mechanism is in open type falling state:
It when user needs to carry out special operation condition operation, such as needs to hurtle down, open type whereabouts mode may be selected.At this point,
Control reversal valve 8 is in right position, and the first on-off valve 7 is in connected state, and the hydraulic oil of hydraulic pump 13 can enter by reversal valve 8
To the second actuator port B of hoist motor, while the second control valve 4 is in upper, and hydraulic oil can be by the upper of the second control valve 4
The first guide cavity that position reaches balanced valve pushes balanced valve open, makes weight-drop.
The hydraulic control system of the present embodiment compared with open type falling state, subtracts when in flow regeneration falling state
Small hoist motor falls a mouthful pressure, thereby reduces the oil outlet pressure of hydraulic pump, and drop by the regenerated mode of flow
The low output flow of hydraulic pump, it is therefore desirable to which the power of engine output reduces, and then reduces system fuel consumption.And this
What the hydraulic control system of embodiment reduced hoist motor falls a mouthful pressure, thereby reduces the chock pressure difference of balanced valve, reduces
The calorific value of system, extends the service life of Hydraulic Elements.
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, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (9)
1. a kind of hydraulic control system of hoisting mechanism, which is characterized 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 to and described second with first oil circuit (X)
Oil circuit (Y) is connect with oil extraction；The falling state includes open type falling state and flow regeneration falling state, under the open type
State is fallen, the pump discharge of the hydraulic pump (13) is connected to second oil circuit (Y) and first oil circuit (X) and oil extraction connect
It is logical；Falling state is regenerated in the flow, the pump discharge and first oil circuit (X) of the hydraulic pump (13) are with described second
Oil circuit (Y) connection；The balanced valve that the hydraulic control system further includes constant pressure source (P), is set on first oil circuit (X)
(3) and the pilot pressure control valve that is set between the leading role chamber of the balanced valve (3) and the constant pressure source (P), in institute
Propradation and the open type falling state are stated, the pilot pressure control valve controls the leading role chamber and second oil
Road connection；Falling state is recycled in the flow, the pilot pressure control valve controls the leading role chamber and the constant pressure
Source connection.
2. the hydraulic control system of hoisting mechanism according to claim 1, which is characterized 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, third hydraulic fluid port and the 4th hydraulic fluid port, the commutation
First hydraulic fluid port of valve (8) is connect with the pump discharge of the hydraulic pump, the second hydraulic fluid port and first oil circuit of the reversal valve (8)
Connection, the third hydraulic fluid port of the reversal valve (8) and second oil circuit connection, the 4th hydraulic fluid port of the reversal valve (8) and oil extraction
Connection, the reversal valve have the first operating position and the second operating position, and in the propradation, the reversal valve is in institute
It states the first operating position and the first hydraulic fluid port of the reversal valve is connected to the second hydraulic fluid port of the reversal valve, the of the reversal valve
Three hydraulic fluid ports are connected to the 4th hydraulic fluid port of the reversal valve；In the falling state, the reversal valve is in second working position
Set and the first hydraulic fluid port of the reversal valve be connected to the third hydraulic fluid port of the reversal valve, the second hydraulic fluid port of the reversal valve with it is described
4th hydraulic fluid port of reversal valve is connected to.
3. the hydraulic control system of hoisting mechanism according to claim 2, which is characterized in that the hydraulic control system packet
State switching control valve is included, in the propradation, the state switching control valve controls first oil circuit and the commutation
Second hydraulic fluid port of valve is connected to；In the falling state, the state switching control valve control first oil circuit selectively with
Second hydraulic fluid port of the reversal valve is connected to or is in open type whereabouts shape with second oil communication to control the hoisting mechanism
State or flow regenerate falling state.
4. the hydraulic control system of hoisting mechanism according to claim 3, which is characterized in that the hydraulic control system is also
Including the third oil circuit (Z) being set between first oil circuit (X) and second oil circuit (Y), the state switching control
Valve includes being set to the first on-off valve (7) between first oil circuit (X) and the second hydraulic fluid port of the reversal valve and being set to
The second on-off valve (6) on the third oil circuit (Z).
5. the hydraulic control system of hoisting mechanism according to claim 1, which is characterized 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 third hydraulic fluid port, first control
First hydraulic fluid port of valve (4) processed and second oil circuit connection, the second hydraulic fluid port of first control valve (4) and the leading role
Chamber connection, the third hydraulic fluid port of first control valve (4) connect with the constant pressure source (P), and first control valve (4) is with the
One operating position and the second operating position, at the propradation and the open type falling state, first control valve (4)
In first operating position and first hydraulic fluid port is connected to second hydraulic fluid port and the third hydraulic fluid port ends；In the stream
Amount regeneration falling state, first control valve (4) be in the second operating position and the third hydraulic fluid port and second hydraulic fluid port
It is connected to and first hydraulic fluid port cut-off.
6. the hydraulic control system of hoisting mechanism according to claim 5, which is characterized in that the pilot pressure control valve
It further include the second control valve (5) being set between the constant pressure source and the third hydraulic fluid port of first control valve, described second
Control valve (5) includes the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port, and the first hydraulic fluid port and constant pressure source of second control valve connect
It connects, the second hydraulic fluid port of second control valve is connect with the third hydraulic fluid port of first control valve, the second control valve third
Hydraulic fluid port is connect 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 are in the third hydraulic fluid port of first operating position and second control valve
It is connected to the second hydraulic fluid port of second control valve and the cut-off of its first hydraulic fluid port；Falling state is recycled in the flow, described the
Two control valves are in the second operating position and the first hydraulic fluid port of second control valve is connected to its second hydraulic fluid port and its third is oily
Mouth cut-off.
7. the hydraulic control system of hoisting mechanism according to claim 6, which is characterized in that second control valve (5)
The oil liquid pressure of the second hydraulic fluid port be adjustably arranged to adjust the pressure of the leading role chamber of the balanced valve and adjust described
The orifice size of the throttle orifice of balanced valve.
8. the hydraulic control system of hoisting mechanism according to any one of claim 1 to 4, which is characterized in that the liquid
Pressure control system further includes overflow valve (10), and the overflow valve is set between second oil circuit and oil extraction.
9. a kind of crane, which is characterized in that including elevator structure and such as hoist engine described in any item of the claim 1 to 8
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 CN107200284A (en) | 2017-09-26 |
| CN107200284B true CN107200284B (en) | 2019-05-21 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11149755B2 (en) * | 2019-10-16 | 2021-10-19 | Caterpillar Inc. | Hydraulic system for a work machine having a hydraulic winch |
| CN111994811B (en) * | 2020-08-03 | 2021-09-21 | 中国铁建重工集团股份有限公司 | Hydraulic control system and engineering vehicle |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001354386A (en) * | 2000-06-14 | 2001-12-25 | Nippon Sharyo Seizo Kaisha Ltd | Hydraulic circuit of winch |
| CN102167266B (en) * | 2011-01-24 | 2013-07-24 | 福田雷沃国际重工股份有限公司 | Main winch rapid-descent and confluent return oil regeneration system of rotary drilling rig |
| CN202612232U (en) * | 2012-06-05 | 2012-12-19 | 郑州正弘桩工机械制造有限公司 | Hydraulic motor driving device and long spiral drilling machine main winch adopting same |
| CN103256264B (en) * | 2013-05-10 | 2016-03-23 | 三一汽车起重机械有限公司 | A kind of hydraulic system and comprise the engineering machinery of this hydraulic system |
| CN204400467U (en) * | 2014-11-24 | 2015-06-17 | 徐州重型机械有限公司 | Crane hoisting energy regenerating and reutilization system and hoisting crane |
| CN105776046B (en) * | 2015-12-31 | 2018-06-26 | 徐州重型机械有限公司 | A kind of hybrid hoisting hydraulic system and the crane using the system |
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