CN104555772B - Crane hoisting hydraulic system and crane - Google Patents
Crane hoisting hydraulic system and crane Download PDFInfo
- Publication number
- CN104555772B CN104555772B CN201410852470.0A CN201410852470A CN104555772B CN 104555772 B CN104555772 B CN 104555772B CN 201410852470 A CN201410852470 A CN 201410852470A CN 104555772 B CN104555772 B CN 104555772B
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- Prior art keywords
- oil
- valve
- hydraulic
- hoist motor
- fluid port
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Classifications
-
- 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
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
- B66D5/28—Operating devices pneumatic or hydraulic specially adapted for winding gear, e.g. in mining hoists
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
- B66D2700/035—Fluid operated braking devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
nullThe invention discloses a kind of crane hoisting hydraulic system and crane，This crane hoisting hydraulic system includes hoist motor (1)、The brake cylinder (2) of described hoist motor (1) and the brake valve (3) of described brake cylinder (2)，Described hoist motor (1) includes hoist motor the first hydraulic fluid port (4) and hoist motor the second hydraulic fluid port (5)，Wherein，Described crane hoisting hydraulic system also includes the repairing oil circuit (6) controlling oil sources and being connected with described hoist motor the second hydraulic fluid port (5)，Described repairing oil circuit (6) is for relying on load deadweight to carry out when elevator is transferred described hoist motor (1) repairing at described hoist motor (1)，The hydraulic control end of described brake valve (3) and described control oil sources hydraulic connecting can switch to, by described control oil sources, the station that makes described brake cylinder (2) open by described brake valve (3).
Description
Technical field
The present invention relates to hydraulic system, in particular it relates to a kind of crane hoisting hydraulic system and crane.
Background technology
Along with global energy reduce, atmospheric pollution increases the weight of, energy-saving and cost-reducing become one that our whole society pays close attention to and ask
Topic.And autocrane is as the product of a high energy consumption, also it is faced with energy-saving and cost-reducing pressure；At each of autocrane
In actuator, the frequency of usage of elevator is the highest, and the work efficiency improving hoisting mechanism plays vital work to reducing energy consumption
With.
Fig. 1 shows a kind of crane hoisting hydraulic system of the prior art, including variable pump 1 ', control crank 22,
The parts such as brake valve 3, elevator balanced valve 13, hoist motor 1 and manipulation valve 2 '.When elevator is transferred, the pressure that variable pump 1 ' exports
Oil enters reversal valve 3 ' through handling valve oil inlet P, controls oil sources simultaneously and handles valve hydraulic control hydraulic fluid port b1 through control crank 22 entrance, pushes away
The next work of dynamic reversal valve 3 ', arrives manipulation valve first by handling pressure oil that valve oil inlet P enters by way of reversal valve 3 '
Actuator port B1, because balanced valve 13 is not opened, the pressure handling valve the first actuator port B1 persistently raises, through balanced valve 13
Hydraulic control hydraulic fluid port open balanced valve 13, handle the pressure of valve the first actuator port B1 by way of balanced valve 13 to the liquid of brake valve 3
To promote, brake valve 3 is the next enters working position to control hydraulic fluid port, and the pressure oil controlling oil sources enters hoist motor 1 by way of brake valve 3
Brake cylinder 2 and open brake cylinder 2, hoist motor 1 rotates, the fluid of hoist motor first hydraulic fluid port 4 of hoist motor 1 by way of
Balanced valve 13, enters and handles valve the second actuator port A1, then by way of the oil sump tank such as counterbalance valve, radiator, thus realize elevator
Transfer action.
The defect that above-mentioned crane hoisting hydraulic system of the prior art is primarily present is: by becoming when elevator is transferred
The amount pressure (this pressure persistently raises) that exports of pump 1 ' open brake valve 3 and drive elevator to transfer, energy expenditure big.
In consideration of it, be necessary to provide a kind of novel crane hoisting hydraulic system, to overcome or alleviated by drawbacks described above.
Summary of the invention
It is an object of the present invention to provide a kind of crane hoisting hydraulic system, this crane hoisting hydraulic system energy consumption
Low.
Another mesh of the present invention is to provide a kind of crane, and this crane uses the crane hoisting liquid that the present invention provides
Pressure system.
To achieve these goals, the present invention provides a kind of crane hoisting hydraulic system, including hoist motor, described volume
Raising brake cylinder and the brake valve of described brake cylinder of motor, described hoist motor includes hoist motor the first hydraulic fluid port and elevator
Motor the second hydraulic fluid port, flows into from described hoist motor the first hydraulic fluid port when hydraulic oil and flows out from described hoist motor the second hydraulic fluid port
Time, described hoist motor band dynamic load ascending motion, when hydraulic oil from the inflow of described hoist motor the second hydraulic fluid port from described volume
When raising the outflow of motor the first hydraulic fluid port, described hoist motor band dynamic load descending motion, wherein, described crane hoisting hydraulic system
Also including the repairing oil circuit controlling oil sources and being connected with described hoist motor the second hydraulic fluid port, described repairing oil circuit is at described volume
Raising motor relies on load deadweight to carry out when elevator is transferred described hoist motor repairing, the hydraulic control end of described brake valve and described control
Liquefaction source hydraulic connecting can switch to, by described control oil sources, the work that makes described brake cylinder open by described brake valve
Position.
Preferably, described crane hoisting hydraulic system also includes pilot operated directional control valve, and described hoist motor the first hydraulic fluid port leads to
The switching crossing described pilot operated directional control valve is selectively connected with main oil feeding line and main oil return circuit, and described control oil sources is by the
One oil circuit control is connected to the first hydraulic control end of described pilot operated directional control valve, and described control oil sources is connected to by the second oil circuit control
Second hydraulic control end of described pilot operated directional control valve, acts on described first hydraulic control end when the hydraulic oil of described control oil sources and makes described
When pilot operated directional control valve switches to the first operating position, the hydraulic oil in described main oil feeding line drives by way of described pilot operated directional control valve
Described hoist motor band dynamic load ascending motion, acts on described second hydraulic control end when the hydraulic oil of described control oil sources and makes institute
Stating pilot operated directional control valve when switching to the second operating position, the hydraulic oil flowed out from described hoist motor the first hydraulic fluid port is by way of described liquid
Control reversal valve oil return and make the load of described hoist motor transfer motion.
Preferably, also to include that shuttle valve, described first oil circuit control are additionally coupled to described for described crane hoisting hydraulic system
First import of shuttle valve, described second oil circuit control is additionally coupled to the second import of described shuttle valve, and the outlet of described shuttle valve connects
To the hydraulic control end of described brake valve, described control oil sources by joystick switchably with described first oil circuit control and described
Second oil circuit control connects.
Preferably, the oil circuit between described hoist motor the first hydraulic fluid port and described pilot operated directional control valve is provided with balanced valve,
Described balanced valve at least can switch between throttle position and one-way conduction position, in described one-way conduction position, it is allowed to liquid
Force feed flows to described hoist motor the first hydraulic fluid port, the hydraulic control of described balanced valve from described second actuator port by way of described balanced valve
End is connected with described second oil circuit control, and described balanced valve also includes relative with the hydraulic control end of described balanced valve and is provided with reset
The spring cavity of spring, described balanced valve is arranged to: acts on the hydraulic control end of described balanced valve when hydraulic oil and promotes described balance
During the valve core movement of valve, described balanced valve can switch to described throttle position from described one-way conduction position, when described spring
When the pressure in chamber promotes the valve core movement of described balanced valve, described balanced valve can switch to described unidirectional from described throttle position
Conduction position, is also associated with between described spring cavity and described hoist motor the first hydraulic fluid port feeding back oil circuit.
Preferably, described feedback oil circuit is provided with damping unit, and described feedback oil circuit is also with the first bleed off circuit even
Connecing, described first bleed off circuit is provided with the first check valve, the forward hydraulic fluid port of described first check valve is with described spring cavity even
Connecing, direction hydraulic fluid port is connected with described hoist motor the first hydraulic fluid port.
Preferably, the hydraulic control end of described balanced valve is also associated with buffering pressure release oil circuit, and described buffering pressure release oil circuit is arranged
Damping unit and the second check valve, the forward hydraulic fluid port of described second check valve is had to be connected with the hydraulic control end of described balanced valve.
Preferably, described pilot operated directional control valve include the first oil-in, the second oil-in, oil return opening, the first actuator port and
Second actuator port, described first oil-in is connected with described main oil feeding line, described oil return opening and described hoist motor second
Hydraulic fluid port is connected with described main oil return circuit respectively, and described second actuator port is connected with described hoist motor the first hydraulic fluid port, described
First actuator port is also connected with described second oil-in, when described pilot operated directional control valve switches to described first operating position,
Described first oil-in with described first actuator port conducting, described second oil-in with described second actuator port conducting and
Described oil return opening ends with described first actuator port and the second actuator port respectively, when described pilot operated directional control valve switches to described
During the second operating position, described second actuator port turns on described oil return opening and described first actuator port is respectively with described
First oil-in, the second oil-in and oil return opening cut-off.
Preferably, described main oil feeding line is provided with load-sensitive formula variable pump, described load-sensitive formula variable pump
Load feedback end is connected to described first actuator port.
Preferably, described crane hoisting hydraulic system also includes accumulator, one end of described repairing oil circuit and described volume
Raising motor the second hydraulic fluid port to connect, the other end is connected to described accumulator.
Preferably, described accumulator by middle oil circuit and described pilot operated directional control valve and described hoist motor the first hydraulic fluid port it
Between oil circuit connect, described middle oil circuit is provided with middle oil circuit check valve, the forward hydraulic fluid port of described middle oil circuit check valve
With described pilot operated directional control valve, the reverse hydraulic fluid port of described middle oil circuit check valve is connected with described accumulator, on described repairing oil circuit
Being additionally provided with hydraulic control one-way valve, the forward hydraulic fluid port of described hydraulic control one-way valve is connected with described hoist motor the second hydraulic fluid port, described liquid
The reverse hydraulic fluid port of control check valve is connected with described accumulator, and the hydraulic control end of described hydraulic control one-way valve is with described second oil circuit control even
Connect.
Additionally, the present invention also provides for a kind of crane, wherein, including according to the crane hoisting described in technique scheme
Hydraulic system.
Preferably, described repairing oil circuit is connected to the execution machine of the hydraulic pressure in addition to described hoist motor of described crane
The oil return circuit controlling loop of structure.
By technique scheme, due to crane hoisting hydraulic system of the present invention also include control oil sources and with
The repairing oil circuit that described hoist motor the second hydraulic fluid port connects, described repairing oil circuit is for relying on load deadweight at described hoist motor
Carrying out to described hoist motor repairing when elevator is transferred, the hydraulic control end of described brake valve and described control oil sources hydraulic connecting are with energy
Enough stations being switched to described brake valve by described control oil sources make described brake cylinder open, it is possible to rely on load
Deadweight drives elevator to transfer, only need to (this repairing oil circuit is interpreted as than the main oil directly driving hoist motor by repairing oil circuit
The oil circuit that the pressure on road is less) supplement certain hydraulic oil, and by being used for driving holding of the working connection of hoist motor
High pressure of continuing rising and by control oil sources (less relative to the pressure of working connection) open checking cylinder, considerably reduce energy
Consumption.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not intended that limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of a kind of crane hoisting hydraulic system of the prior art.
Fig. 2 is the schematic diagram of the crane hoisting hydraulic system of the first embodiment according to the present invention.
Fig. 3 is the schematic diagram of the crane hoisting hydraulic system of the second embodiment according to the present invention.
Fig. 4 is the schematic diagram of the crane hoisting hydraulic system of the third embodiment according to the present invention.
Fig. 5 is the partial schematic diagram at pilot operated directional control valve according to the embodiment of the present invention.
Fig. 6 is the partial schematic diagram at balanced valve according to the embodiment of the present invention
Description of reference numerals
1 ' variable pump 2 ' handles valve
3 ' reversal valve 1 hoist motors
2 brake cylinder 3 brake valves
4 hoist motor the first hydraulic fluid port 5 hoist motor the second hydraulic fluid ports
6 repairing oil circuit 7 shuttle valves
The 8 main oil feeding lines of pilot operated directional control valve 9
10 main oil return circuit 11 first oil circuit controls
12 second oil circuit control 13 balanced valves
14 feedback oil circuits 15 buffer pressure release oil circuit
16 load-sensitive formula variable pump 17 accumulators
18 middle oil circuit 19 middle oil circuit check valves
20 hydraulic control one-way valve 21 hydraulic actuating mechanisms
22 control crank 23 first bleed off circuits
81 first oil-in 82 second oil-ins
83 oil return opening 84 first actuator ports
85 second actuator port P handle valve oil-in
B1 handles valve hydraulic control hydraulic fluid port A1 and handles valve the second actuator port
B1 handles valve the first actuator port
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of the present invention is described in detail.It should be appreciated that this place is retouched
The detailed description of the invention stated is merely to illustrate and explains the present invention, is not limited to the present invention.
See Fig. 2 to Fig. 4, according to an aspect of the present invention, it is provided that a kind of crane hoisting hydraulic system, including elevator
Motor 1, the brake cylinder 2 of hoist motor 1 and the brake valve 3 of brake cylinder 2, hoist motor 1 includes hoist motor the first hydraulic fluid port 4
With hoist motor the second hydraulic fluid port 5, flow into from hoist motor the first hydraulic fluid port 4 when hydraulic oil and flow out from hoist motor the second hydraulic fluid port 5
Time, hoist motor 1 band dynamic load ascending motion, when hydraulic oil flows into and from hoist motor first from hoist motor the second hydraulic fluid port 5
When hydraulic fluid port 4 flows out, hoist motor 1 band dynamic load descending motion, wherein, crane hoisting hydraulic system also include control oil sources and
The repairing oil circuit 6 being connected with hoist motor the second hydraulic fluid port 5, repairing oil circuit 6 is for relying on load deadweight to roll up at hoist motor 1
Raising to hoist motor 1 repairing when transferring, the hydraulic control end of brake valve 3 and control oil sources hydraulic connecting are can incite somebody to action by controlling oil sources
Brake valve 3 switches to the station making brake cylinder 2 open.
It is as noted previously, as crane hoisting hydraulic system of the present invention also to include controlling oil sources and and hoist motor
The repairing oil circuit 6 that second hydraulic fluid port 5 connects, repairing oil circuit 6 is for relying on load deadweight to carry out when elevator is transferred pair at hoist motor 1
Hoist motor 1 repairing, the hydraulic control end of brake valve 3 and control oil sources hydraulic connecting are can cut brake valve 3 by controlling oil sources
Shift to the station making brake cylinder 2 open, it is possible to rely on load deadweight to drive elevator to transfer, only need to be by repairing oil circuit 6
(this repairing oil circuit 6 is interpreted as the oil circuit less than the pressure of the directly working connection of driving hoist motor 1) supplements certain liquid
Force feed, and (not relative by controlling oil sources by the pressure of the lasting rising of the working connection for driving hoist motor
Less in the pressure of working connection) open checking cylinder, considerably reduce energy consumption.Here, referring specifically to Fig. 2, according to the present invention's
The first embodiment, repairing oil circuit 6 can connect the control of the hydraulic actuating mechanism 21 in addition to hoist motor 1 of crane
The oil return circuit in loop processed, sufficiently to utilize hydraulic oil, reduces energy consumption, but the invention is not restricted to this.
Additionally, referring also to Fig. 2 to Fig. 4, crane hoisting hydraulic system can also include shuttle valve 7 and pilot operated directional control valve 8, volume
Raise motor the first hydraulic fluid port 4 to be selectively connected with main oil feeding line 9 and main oil return circuit 10 by the switching of pilot operated directional control valve 8,
Control oil sources and be connected to the first hydraulic control end of pilot operated directional control valve 8 by the first oil circuit control 11, control oil sources by the second control
Oil circuit 12 is connected to the second hydraulic control end of pilot operated directional control valve 8, wherein, control oil sources can by joystick 22 switchably with
First oil circuit control 11 and the second oil circuit control 12 connect, and act on the first hydraulic control end when the hydraulic oil controlling oil sources and make hydraulic control
When reversal valve 8 switches to the first operating position, the hydraulic oil in main oil feeding line 9 drives hoist motor 1 by way of pilot operated directional control valve 8
Band dynamic load ascending motion, acts on the second hydraulic control end when the hydraulic oil controlling oil sources and makes pilot operated directional control valve 8 switch to second
During operating position, the hydraulic oil flowed out from hoist motor the first hydraulic fluid port 4 makes hoist motor 1 by way of pilot operated directional control valve 8 oil return
Motion is transferred in load, and the first oil circuit control 11 is additionally coupled to the first import of shuttle valve 7, and the second oil circuit control 12 is additionally coupled to shuttle valve
Second import of 7, the outlet of shuttle valve 7 is connected to the hydraulic control end of brake valve 3.Consequently, it is possible to the first oil circuit control 11 or second
Hydraulic control oil in oil circuit control 12 can arrive the hydraulic control end of brake valve 3 by way of shuttle valve 7 such that it is able at the first oil circuit control
11 or second hydraulic control oil in oil circuit control 12 control pilot operated directional control valve 8 respectively and switch to the first operating position or switch to second
While operating position, correspondingly control brake cylinder 2 open so that hoist motor 1 can carry out rise operating mode and under knock off
Condition.Certainly, pilot operated directional control valve 8 can also switch to other positions, owing to other positions are not related to the central inventive of the present invention
Point, the most reinflated explanation.
From fig. 5, it can be seen that specifically, pilot operated directional control valve 8 can include first oil-in the 81, second oil-in 82, return
Hydraulic fluid port the 83, first actuator port 84 and the second actuator port 85, the first oil-in 81 is connected with main oil feeding line 9, oil return opening 83
Being connected with main oil return circuit 10 respectively with hoist motor the second hydraulic fluid port 5, the second actuator port 85 is with hoist motor the first hydraulic fluid port 4 even
Connecing, the first actuator port 84 is also connected with the second oil-in 82, when pilot operated directional control valve 8 switches to the first operating position, and first
Oil-in 81 and the first actuator port 84 turn on, the second oil-in 82 and the second actuator port 85 turns on and oil return opening 83 respectively
End with the first actuator port 84 and the second actuator port 85, when pilot operated directional control valve 8 switches to the second operating position, the second work
Make hydraulic fluid port 85 turn on oil return opening 83 and the first actuator port 84 respectively with first oil-in the 81, second oil-in 82 and oil return
Mouth 83 cut-off.It is understood that the setting of the above-mentioned hydraulic fluid port of pilot operated directional control valve 8 and these hydraulic fluid ports when different operating position
Conducting relation or cut-off relation are intended merely to meet elevator and rise operating mode and elevator transfers a kind of embodiment of operating mode, also
That is, the setting of the above-mentioned hydraulic fluid port of pilot operated directional control valve 8 and the conducting relation of these hydraulic fluid ports or cut-off when different operating position
Relation is not unique, but can make other designs, as long as disclosure satisfy that pilot operated directional control valve 8 is when the first operating position
Making hoist motor 1 be in rising operating mode, pilot operated directional control valve 8 makes when the second operating position hoist motor 1 be in and transfers operating mode
Can.
From fig. 6, it can be seen that the oil between hoist motor the first hydraulic fluid port 4 and the second actuator port 85 of pilot operated directional control valve 8
Being additionally provided with balanced valve 13 on road, balanced valve 13 at least can switch, unidirectional between throttle position and one-way conduction position
Conduction position, it is allowed to hydraulic oil flows to hoist motor the first hydraulic fluid port 4, balanced valve 13 from the second actuator port 85 by way of balanced valve 3
Hydraulic control end and the second oil circuit control 12 connect with can make the hydraulic oil of the second oil circuit control 12 control hoist motor 1 be in
Opening balanced valve 13 when transferring operating mode, balanced valve 13 also includes relative with the hydraulic control end of balanced valve 13 and is provided with back-moving spring
Spring cavity, balanced valve 13 is arranged to: acts on the hydraulic control end of balanced valve 13 when hydraulic oil and promotes the valve core movement of balanced valve 13
Time, balanced valve 13 can switch to throttle position from one-way conduction position, when the pressure of spring cavity promotes the spool of balanced valve 13
During motion, balanced valve 13 can switch to one-way conduction position from throttle position, between spring cavity and hoist motor the first hydraulic fluid port 4
It is also associated with feeding back oil circuit 14.The setting of feedback oil circuit 14 so that hoist motor 1 is in transfers operating mode (hydraulic oil is from elevator horse
Reach the first hydraulic fluid port 4 flow out and by way of balanced valve 13) time, feedback oil circuit 14 can be in time by load pressure (i.e. hoist motor the
The pressure of the oil circuit between one hydraulic fluid port 4 and balanced valve 13) feed back to balanced valve 13, namely by the spring cavity 13 of balanced valve
Saying, now effect needs to overcome pressure (the i.e. spring force of back-moving spring of spring cavity with the hydraulic oil of the hydraulic control end of balanced valve 13
The pressure sum of the hydraulic oil of spring cavity is entered with feedback oil circuit 14) promote the valve core movement of balanced valve 13 to make balanced valve 13
Open (i.e. switching to throttle position), so during load pressure big (at this moment the pressure of the hydraulic oil of feedback oil circuit 14 is big), balance
Valve opening pressure is big, and during load pressure little (at this moment the pressure of the hydraulic oil of feedback oil circuit 14 is little), balance valve opening pressure is little, from
And make hoist motor 1 run more smoothly, especially it is prevented from elevator heavy-load lowering too fast.
Additionally, be provided with damping unit on feedback oil circuit 14, the damping action of this damping unit can by load pressure more
Feed back to the spring cavity of balanced valve 13 lentamente, thus so that the unlatching of balanced valve 13 is more steady, and feedback oil circuit 14 also with
First bleed off circuit 23 connects, and the first bleed off circuit 23 is provided with the first check valve, the forward hydraulic fluid port of the first check valve and bullet
Spring chamber connects, and direction hydraulic fluid port is connected with hoist motor the first hydraulic fluid port 4, and the first check valve makes when the hydraulic oil feeding back oil circuit 14
During pressure less (load pressure is little), it is possible to shed the hydraulic oil in the spring cavity of balanced valve 13 rapidly thus decrease flat
The unlatching resistance of weighing apparatus valve 13, say, that at load pressure hour, balanced valve 13 can more quickly start.Certainly, balanced valve 13
Hydraulic control end can also connect and have buffering pressure release oil circuit 15, buffering pressure release oil circuit 15 is provided with damping unit and second unidirectional
Valve, the forward hydraulic fluid port of the second check valve is connected with the hydraulic control end of balanced valve 13, and buffering pressure release oil circuit 15 can make balanced valve 13
The pressure of hydraulic control end lays down a part of pressure time excessive, and makes balanced valve 13 more smoothly open.
Additionally, be provided with load-sensitive formula variable pump 16 on main oil feeding line 9, the load of load-sensitive formula variable pump 16 is anti-
Feedback end is connected to the first actuator port 84 of pilot operated directional control valve 8, such that it is able to actual flow need when working according to hoist motor 1
Seek the discharge capacity of regulating load sensitive variable pump 16, to avoid unnecessary energy dissipation.
Referring specifically to Fig. 3, according to the second embodiment of the present invention, crane hoisting hydraulic system can also include storing
Energy device 17, one end of repairing oil circuit 6 is connected with hoist motor the second hydraulic fluid port 5, and the other end is connected to accumulator 17, such that it is able to logical
Cross accumulator 17 to being in hoist motor 1 repairing transferring operating mode.
Referring specifically to Fig. 4, according to the third embodiment of the present invention, accumulator 17 can be by middle oil circuit 18 and liquid
Oil circuit between second actuator port 85 and hoist motor first hydraulic fluid port 4 of control reversal valve 8 connects, and middle oil circuit 18 is provided with
Middle oil circuit check valve 19, the middle forward hydraulic fluid port of oil circuit check valve 19 is connected with the second actuator port 85 of pilot operated directional control valve 8,
The reverse hydraulic fluid port of middle oil circuit check valve 19 is connected with accumulator 17, and repairing oil circuit 6 is additionally provided with hydraulic control one-way valve 20, hydraulic control
The forward hydraulic fluid port of check valve 20 is connected with hoist motor the second hydraulic fluid port 5, and the reverse hydraulic fluid port of hydraulic control one-way valve 20 is with accumulator 17 even
Connecing, hydraulic control end and second oil circuit control 12 of hydraulic control one-way valve 20 connect.When hoist motor 1 is in rising operating mode, from hydraulic control
A part of hydraulic oil in the hydraulic oil that second actuator port 85 of reversal valve 8 flows out passes in and out accumulator 17 by way of middle oil circuit 18
In store, when hoist motor 1 is in and transfers operating mode, the hydraulic oil on the second oil circuit control 12 can make hydraulic control one-way valve
20 open, thus the hydraulic oil in accumulator 17 can give hoist motor 1 repairing by way of hydraulic control one-way valve 20, prevents hoist motor
1 is emptied.
According to another aspect of the present invention, also providing for a kind of crane, wherein, this crane can include according to above-mentioned
Crane hoisting hydraulic system described in technical scheme.Owing to this crane hoisting hydraulic system has above-mentioned plurality of advantages, should
The overall performance of crane have also been obtained raising at (including energy-efficient performance etc.).It addition, repairing oil circuit 6 can be connected to crane
The oil return circuit controlling loop of the hydraulic actuating mechanism 21 in addition to hoist motor 1, and the invention is not restricted to this.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing, but, the present invention is not limited to above-mentioned reality
Execute the detail in mode, in the technology concept of the present invention, technical scheme can be carried out multiple letter
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each the concrete technical characteristic described in above-mentioned detailed description of the invention, at not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy illustrates the most separately.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it should be considered as content disclosed in this invention equally.
Claims (12)
1. a crane hoisting hydraulic system, including hoist motor (1), the brake cylinder (2) of described hoist motor (1) and institute
Stating the brake valve (3) of brake cylinder (2), described hoist motor (1) includes hoist motor the first hydraulic fluid port (4) and hoist motor second
Hydraulic fluid port (5), flows into from described hoist motor the first hydraulic fluid port (4) when hydraulic oil and flows out from described hoist motor the second hydraulic fluid port (5)
Time, the dynamic load ascending motion of described hoist motor (1) band, when hydraulic oil from described hoist motor the second hydraulic fluid port (5) flow into and from
When described hoist motor the first hydraulic fluid port (4) flows out, described hoist motor (1) band dynamic load descending motion, it is characterised in that described
Crane hoisting hydraulic system also includes the repairing oil circuit (6) controlling oil sources and being connected with described hoist motor the second hydraulic fluid port (5),
Described repairing oil circuit (6) is for relying on load deadweight to carry out when elevator is transferred described hoist motor at described hoist motor (1)
(1) repairing, the hydraulic control end of described brake valve (3) and described control oil sources hydraulic connecting are with can be by described control oil sources by institute
State the station that brake valve (3) switches to make described brake cylinder (2) open.
Crane hoisting hydraulic system the most according to claim 1, it is characterised in that described crane hoisting hydraulic system
Also including pilot operated directional control valve (8), described hoist motor the first hydraulic fluid port (4) is by the switching of described pilot operated directional control valve (8) and main confession
Oil oil circuit (9) and main oil return circuit (10) are selectively connected, and described control oil sources is connected to by the first oil circuit control (11)
First hydraulic control end of described pilot operated directional control valve (8), described control oil sources is connected to described hydraulic control by the second oil circuit control (12)
Second hydraulic control end of reversal valve (8), acts on described first hydraulic control end when the hydraulic oil of described control oil sources and makes described hydraulic control
When reversal valve (8) switches to the first operating position, the hydraulic oil in described main oil feeding line (9) is by way of described pilot operated directional control valve
(8) the dynamic load ascending motion of described hoist motor (1) band is driven, when the hydraulic oil of described control oil sources acts on described second liquid
When controlling end and make described pilot operated directional control valve (8) switch to the second operating position, flow out from described hoist motor the first hydraulic fluid port (4)
Hydraulic oil makes the load of described hoist motor (1) transfer motion by way of (8) oil return of described pilot operated directional control valve.
Crane hoisting hydraulic system the most according to claim 2, it is characterised in that described crane hoisting hydraulic system
Also including that shuttle valve (7), described first oil circuit control (11) are additionally coupled to the first import of described shuttle valve (7), described second controls
Oil circuit (12) is additionally coupled to the second import of described shuttle valve (7), and the outlet of described shuttle valve (7) is connected to described brake valve (3)
Hydraulic control end, described control oil sources is switchably controlled with described first oil circuit control (11) and described second by joystick (22)
Liquefaction road (12) connects.
Crane hoisting hydraulic system the most according to claim 3, it is characterised in that described hoist motor the first hydraulic fluid port
(4) being provided with balanced valve (13) on the oil circuit and between described pilot operated directional control valve (8), described balanced valve (13) at least can be at joint
Switch between stream position and one-way conduction position, in described one-way conduction position, it is allowed to hydraulic oil is from described pilot operated directional control valve (8)
The second actuator port (85) flow to described hoist motor the first hydraulic fluid port (4), described balanced valve by way of described balanced valve (13)
(13) hydraulic control end is connected with described second oil circuit control (12), and described balanced valve (13) also includes and described balanced valve (13)
Hydraulic control end relatively and is provided with the spring cavity of back-moving spring, and described balanced valve (13) is arranged to: when hydraulic oil acts on described flat
The hydraulic control end of weighing apparatus valve (13) and when promoting the valve core movement of described balanced valve (13), described balanced valve (13) can be from described unidirectional
Conduction position switches to described throttle position, when the pressure of described spring cavity promotes the valve core movement of described balanced valve (13),
Described balanced valve (13) can switch to described one-way conduction position, described spring cavity and described elevator horse from described throttle position
Reach and be also associated with between the first hydraulic fluid port (4) feeding back oil circuit (14).
Crane hoisting hydraulic system the most according to claim 4, it is characterised in that described feedback oil circuit (14) is upper to be arranged
There is damping unit, and described feedback oil circuit (14) is also connected with the first bleed off circuit (23), on described first bleed off circuit (23)
Being provided with the first check valve, the forward hydraulic fluid port of described first check valve is connected with described spring cavity, reverse hydraulic fluid port and described elevator
Motor the first hydraulic fluid port (4) connects.
Crane hoisting hydraulic system the most according to claim 5, it is characterised in that the hydraulic control end of described balanced valve (13)
It is also associated with buffering pressure release oil circuit (15), described buffering pressure release oil circuit (15) is provided with damping unit and the second check valve, institute
The hydraulic control end of the forward hydraulic fluid port and described balanced valve (13) of stating the second check valve is connected.
Crane hoisting hydraulic system the most according to claim 2, it is characterised in that described pilot operated directional control valve (8) includes
First oil-in (81), the second oil-in (82), oil return opening (83), the first actuator port (84) and the second actuator port (85),
Described first oil-in (81) is connected with described main oil feeding line (9), described oil return opening (83) and described hoist motor the second oil
Mouth (5) is connected with described main oil return circuit (10) respectively, described second actuator port (85) and described hoist motor the first hydraulic fluid port
(4) connecting, described first actuator port (84) is also connected with described second oil-in (82), when described pilot operated directional control valve (8) is cut
When shifting to described first operating position, described first oil-in (81) and described first actuator port (84) conducting, described second
The conducting of oil-in (82) and described second actuator port (85) and described oil return opening (83) respectively with described first actuator port
(84) and the second actuator port (85) ends, when described pilot operated directional control valve (8) switches to described second operating position, and described the
The conducting of two actuator ports (85) and described oil return opening (83) and described first actuator port (84) respectively with described first oil-in
(81), the second oil-in (82) and oil return opening (83) cut-off.
Crane hoisting hydraulic system the most according to claim 7, it is characterised in that set on described main oil feeding line (9)
Being equipped with load-sensitive formula variable pump (16), the load feedback end of described load-sensitive formula variable pump (16) is connected to described first work
Make hydraulic fluid port (84).
Crane hoisting hydraulic system the most as claimed in any of claims 2 to 8, it is characterised in that described lifting
Machine hoisting hydraulic system also includes accumulator (17), one end of described repairing oil circuit (6) and described hoist motor the second hydraulic fluid port (5)
Connecting, the other end is connected to described accumulator (17).
Crane hoisting hydraulic system the most according to claim 9, it is characterised in that during described accumulator (17) passes through
Between oil circuit between oil circuit (18) with described pilot operated directional control valve (8) and described hoist motor the first hydraulic fluid port (4) be connected, described centre
Middle oil circuit check valve (19), the forward hydraulic fluid port of described middle oil circuit check valve (19) and described hydraulic control it is provided with on oil circuit (18)
Reversal valve (8), the reverse hydraulic fluid port of described middle oil circuit check valve (19) is connected with described accumulator (17), described repairing oil circuit
(6) hydraulic control one-way valve (20), the forward hydraulic fluid port of described hydraulic control one-way valve (20) and described hoist motor the second oil it are additionally provided with on
Mouth (5) connects, and the reverse hydraulic fluid port of described hydraulic control one-way valve (20) is connected with described accumulator (17), described hydraulic control one-way valve (20)
Hydraulic control end be connected with described second oil circuit control (12).
11. 1 kinds of cranes, it is characterised in that include crane hoisting as claimed in any of claims 1 to 10
Hydraulic system.
12. cranes according to claim 11, it is characterised in that described repairing oil circuit (6) is connected to described crane
The hydraulic actuating mechanism (21) in addition to described hoist motor (1) control loop oil return circuit.
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| CN201410852470.0A CN104555772B (en) | 2014-12-31 | 2014-12-31 | Crane hoisting hydraulic system and crane |
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| CN201410852470.0A CN104555772B (en) | 2014-12-31 | 2014-12-31 | Crane hoisting hydraulic system and crane |
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| CN104555772A CN104555772A (en) | 2015-04-29 |
| CN104555772B true CN104555772B (en) | 2016-12-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927602B (en) * | 2016-07-08 | 2017-12-08 | 四川宏华石油设备有限公司 | A kind of winch control device |
| CN106050769A (en) * | 2016-08-08 | 2016-10-26 | 湖南星邦重工有限公司 | Lifting platform and hydraulic driving system thereof |
| CN109095367B (en) * | 2018-09-04 | 2020-05-12 | 徐工集团工程机械有限公司 | Hydraulic system and crane |
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| US6012707A (en) * | 1995-05-19 | 2000-01-11 | Tamrock Oy | Arrangement for controlling tension in a winch cable connected to rock drilling equipment |
| JP2000351585A (en) * | 1999-06-14 | 2000-12-19 | Hitachi Constr Mach Co Ltd | Brake device for winch |
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| CN104555772A (en) | 2015-04-29 |
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