CN207178334U - Crane hydraulic control system and crane - Google Patents
Crane hydraulic control system and crane Download PDFInfo
- Publication number
- CN207178334U CN207178334U CN201721001515.9U CN201721001515U CN207178334U CN 207178334 U CN207178334 U CN 207178334U CN 201721001515 U CN201721001515 U CN 201721001515U CN 207178334 U CN207178334 U CN 207178334U
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- crane
- oil circuit
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The utility model belongs to technical field of hydraulic, and in particular to a kind of crane hydraulic control system and crane.Crane hydraulic control system described in the utility model, the change-over pilot valve being connected including hydraulic pump, with hydraulic pump, the first working connection and the second working connection and reducer unit that are connected respectively with hydraulic pump two-port, reducer unit includes the first auxiliary oil circuit and the second auxiliary oil circuit, the oil inlet of first auxiliary oil circuit is connected with the first working connection, the oil-out of first auxiliary oil circuit is connected with one end of change-over pilot valve, the oil inlet of second auxiliary oil circuit is connected with the second working connection, and the oil-out of the second auxiliary oil circuit is connected with the other end of change-over pilot valve.By using crane hydraulic control system described in the utility model, can be during hoist engine transfers heavy duty, operating pressure is reduced to certain limit, so as to ensure that enough pressure differences are formed between operating pressure and return pressure, enough moments of torsion are provided, ensure the even running of heavy-load lowering process.
Description
Technical field
The utility model belongs to technical field of hydraulic, and in particular to a kind of crane hydraulic control system and lifting
Machine.
Background technology
In some engineering machinery vehicle industries such as crawler crane, multiple executing agency's work are had；With Closed Hydraulic side
When case designs, in order to reduce cost, using single enclosed pump function switch valve can be coordinated to control two difference in functionality loops
Executing agency, such as hoisting system, running gear；But the pressure parameter of two working condition requirements is inconsistent after all, Zhi Neng
Carry out setup parameter according to the operating mode of extreme design pressure on single pump, so may result in, for a certain operating mode loop, pressure parameter
Set too high, bring using upper potential safety hazard；
Existing crawler crane closed circuit scheme such as Fig. 1, during crawler travel operating mode, switching valve 1 ', switching valve 25 '
Electric upper work, the first enclosed pump 1 ' and the first running motor 3 ' composition closed circuit are obtained, has advance after being carried due to band, retreat work
Condition, so the overflow valve 1 of the both sides of the first enclosed pump 1 ' ', overflow valve 27 ' pressure set points need survey to be set to 420bar；Volume
When raising operating mode, switching valve 1 ' and the next work of 25 ' dead electricity of switching valve, the first enclosed pump 1 ' and the first hoist motor 2 ' form
Closed circuit, the overflow valve one 6 ' and overflow valve 27 of both sides ' pressure set points it is consistent with above operating mode, be all high pressure
420bar。
Because the use condition in two operating mode loops determines, overflow valve 1 ' and overflow valve 27 ' parameter value will be according to
Heavy duty walking operating mode setting.At this point for elevator operating mode, during heavy-load lowering, the pressure of the working oil trackside of the first hoist motor 2 ' can
350bar is increased to impact, oil return lateral pressure can not again be raised by overflow valve 27 ' limited, cause the first hoist motor
The pressure difference of 2 ' both sides reduces, and the torque arithmetic formula of the motor is moment of torsion=motor displacement * motors both sides pressure difference, and pressure difference reduces
Or no longer increase, moment of torsion can be caused to reduce or can not increase again, it is incessantly heavily loaded so as to drag, cause weight stall to be transferred, make
Into serious accident.
Utility model content
The purpose of this utility model is to solve above-mentioned at least one problem, and the purpose is by following technology
What scheme was realized.
The utility model proposes a kind of crane hydraulic control system, including hydraulic pump, with the hydraulic pump phase
Change-over pilot valve even, the first working connection and the second working connection and pressure-reducing valve being connected respectively with the hydraulic pump two-port
Group, the reducer unit include the first auxiliary oil circuit and the second auxiliary oil circuit, the oil inlet of first auxiliary oil circuit and the described first master
Oil circuit is connected, and the oil-out of first auxiliary oil circuit is connected with one end of the change-over pilot valve, and second auxiliary oil circuit enters
Hydraulic fluid port is connected with second working connection, and the oil-out of second auxiliary oil circuit is connected with the other end of the change-over pilot valve.
Further, first auxiliary oil circuit is provided with first pressure stop valve, second pressure stop valve and pressure cut off
Reversal valve, the first pressure stop valve and the second pressure stop valve are arranged in parallel on first auxiliary oil circuit, described
The oil inlet of the oil inlet of first pressure stop valve and the second pressure stop valve is connected with first working connection, described
The oil-out of the oil-out of first pressure stop valve and the second pressure stop valve enters with the pressure cut off reversal valve
Hydraulic fluid port is connected, and the oil-out of the pressure cut off reversal valve is connected with one end of the change-over pilot valve, second auxiliary oil circuit
The 3rd pressure shut-off valve is provided with, the oil inlet of the 3rd pressure shut-off valve is connected with second auxiliary oil circuit, and the described 3rd
The oil-out of pressure shut-off valve is connected with the other end of the change-over pilot valve.
Further, the rated operating pressure of the first pressure stop valve is 150bar, the second pressure stop valve
Rated pressure with the 3rd pressure shut-off valve is 390bar.
Further, the pressure cut off reversal valve is two four-way electromagnetic reversing valves.
Further, the hydraulic pump is bidirectional variable hydraulic pump.
Further, the system nominal pressure of first working connection and second working connection is 420bar.
The utility model also proposed a kind of crane, and the crane is included described in executing agency and any of the above-described
Crane hydraulic control system.
By using crane hydraulic control system described in the utility model and crane, weight can be transferred in hoist engine
During load, operating pressure is reduced to certain limit, so as to ensure to be formed enough between operating pressure and return pressure
Pressure difference, there is provided enough moments of torsion, ensure the even running of heavy-load lowering process.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to this practicality
New limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of prior art；
Fig. 2 is the hydraulic schematic diagram of the utility model embodiment.
Each mark represents as follows in accompanying drawing：
1′：First enclosed pump, 2 '：First hoist motor, 3 '：First running motor, 4 '：Switching valve one, 5 '：Switching valve
2nd, 6 '：Overflow valve one, 7 '：Overflow valve two；
1：Hydraulic pump, 2：First overflow valve, 3：Slippage pump, 4：Second overflow valve, 5：Pressure cut off reversal valve, 6：First pressure
Power stop valve, 7：3rd pressure shut-off valve, 8：Second pressure stop valve, 9：Change-over pilot valve, 10：Second pressure reversal valve, 11：
Running motor, 12：Hoist motor, 13：First pressure reversal valve.
Embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in accompanying drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.Conversely, there is provided these embodiments are to be able to be best understood from the disclosure, and can be by this public affairs
The scope opened completely is communicated to those skilled in the art.
Fig. 2 is the hydraulic schematic diagram of the utility model embodiment.As illustrated, the crane hydraulic control in the present embodiment
System, including hydraulic pump 1, the change-over pilot valve 9 being connected with hydraulic pump 1, the first main oil for being connected respectively with the two-port of hydraulic pump 1
Road and the second working connection and reducer unit, reducer unit include the first auxiliary oil circuit and the second auxiliary oil circuit, and the first auxiliary oil circuit enters
Hydraulic fluid port is connected with the first working connection, and the oil-out of the first auxiliary oil circuit is connected with one end of change-over pilot valve, and the second auxiliary oil circuit enters
Hydraulic fluid port is connected with the second working connection, and the oil-out of the second auxiliary oil circuit is connected with the other end of change-over pilot valve.
In the present embodiment, the hydraulic pump 1 used is bidirectional variable hydraulic pump.Wherein, the first auxiliary oil circuit is provided with the first pressure
Power stop valve 6, second pressure stop valve 8 and pressure cut off reversal valve 5, first pressure stop valve 6 and second pressure stop valve 8 are simultaneously
Connection is arranged on the first auxiliary oil circuit, and the oil inlet of first pressure stop valve 6 and the oil inlet of second pressure stop valve 8 are with first
Working connection is connected, the oil-out of first pressure stop valve 6 and the oil-out of second pressure stop valve 8 with pressure cut off reversal valve
5 oil inlet is connected, and the oil-out of pressure cut off reversal valve 5 is connected with one end of change-over pilot valve 9, and the second auxiliary oil circuit is provided with
3rd pressure shut-off valve 7, the oil inlet of the 3rd pressure shut-off valve 7 are connected with the second auxiliary oil circuit, the 3rd pressure shut-off valve 7 it is fuel-displaced
Mouth is connected with the other end of change-over pilot valve 9.
In the present embodiment, be respectively equipped with the first working connection and the second working connection at the both ends of hydraulic pump 1, the first working connection and
Hoist motor 12 and running motor 11 are provided between second working connection, hoist motor 12 and running motor 11 are in parallel.Hoist motor
First pressure reversal valve 13, hoist motor 12 and running motor 11 and are provided between 12 and the working connection of running motor 11 and first
Second pressure reversal valve 10 is provided between two working connections, by switching first pressure reversal valve 13 and second pressure reversal valve simultaneously
10 can complete crane from walking mode to the switching elevator pattern.
The first overflow valve 2 is additionally provided with first working connection, the second working connection is provided with the second overflow valve 4, the first overflow valve 2
420bar is set to the maximum pressure of the second overflow valve 4, so as to ensure that the rated pressure of system is 420bar.
The first auxiliary oil circuit is additionally provided with the first working connection, the second auxiliary oil circuit is additionally provided with the second working connection.First secondary oil
The rated operating pressure of the first stop valve 6 on road is 150bar, and the rated operating pressure of the 3rd stop valve 7 is 390bar, the
The rated operating pressure of the second stop valve 8 on two auxiliary oil circuits is 390bar.
Dead electricity, bottom work, crane hydraulic circuit are cut simultaneously for first pressure reversal valve 13 and second pressure reversal valve 10
It is changed to enclosed hoisting system.
When carrying out heavy duty lifting, the second working connection is working oil path, and the first working connection is oil return line, now, control pressure
Power cut-out reversal valve 5 must be electric, and the 3rd stop valve 7 turns on.Due to being connected with the second stop valve 8 on the second working connection, therefore, work
Pressure on oil circuit is 390bar.Meanwhile first is connected with the 3rd stop valve 7 on working connection, therefore, the pressure on oil return line
For 390bar.Now, slippage pump 3 is the pressure that change-over pilot valve 9 provides about 20bar, forms pressure difference for system, completes counterweight
The lifting process of load.
When carrying out heavy-load lowering, the first working connection is working oil path, and the second working connection is oil return line, and now, pressure is cut
The disconnected dead electricity of reversal valve 5, the first stop valve 6 turn on.Therefore, the 150bar of the pressure in working oil path.Meanwhile the pressure on oil return line
Power is 390bar.There is enough pressure differences between system working oil path and oil return line, ensure that the steady fortune of heavy-load lowering process
OK, the generation of accident is reduced.
By using crane hydraulic control system described in the utility model, heavily loaded process can be transferred in hoist engine
In, operating pressure is reduced to certain limit, so as to ensure that enough pressure differences are formed between operating pressure and return pressure, there is provided
Enough moments of torsion, ensure the even running of heavy-load lowering process.
First switching valve 6 and the second switching valve 8 simultaneously must be electric, and upper work, crane hydraulic circuit switches to enclosed row
Walking system.
When running gear moves forwards or backwards, pressure cut off reversal valve 5 remains to obtain electricity condition.In system
Pressure in working oil path and oil return line is 390bar, ensure that the advance of vehicle or the even running of fallback procedures.
It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not
This is confined to, any one skilled in the art can readily occur in the technical scope that the utility model discloses
Change or replacement, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with
The scope of the claims is defined.
Claims (7)
1. crane hydraulic control system, it is characterised in that the change-over pilot valve that is connected including hydraulic pump, with the hydraulic pump,
The first working connection and the second working connection and reducer unit being connected respectively with the hydraulic pump two-port, the reducer unit bag
The first auxiliary oil circuit and the second auxiliary oil circuit are included, the oil inlet of first auxiliary oil circuit is connected with first working connection, and described first
The oil-out of auxiliary oil circuit is connected with one end of the change-over pilot valve, the oil inlet of second auxiliary oil circuit and the described second main oil
Road is connected, and the oil-out of second auxiliary oil circuit is connected with the other end of the change-over pilot valve.
2. crane hydraulic control system according to claim 1, it is characterised in that first auxiliary oil circuit is provided with the
One pressure shut-off valve, second pressure stop valve and pressure cut off reversal valve, the first pressure stop valve and the second pressure
Stop valve is arranged in parallel on first auxiliary oil circuit, the oil inlet of the first pressure stop valve and second pressure cut-out
The oil inlet of valve is connected with first working connection, the oil-out of the first pressure stop valve and second pressure cut-out
Oil inlet of the oil-out of valve with the pressure cut off reversal valve is connected, the oil-out of the pressure cut off reversal valve with it is described
One end of change-over pilot valve is connected, and second auxiliary oil circuit is provided with the 3rd pressure shut-off valve, the 3rd pressure shut-off valve
Oil inlet is connected with second auxiliary oil circuit, the oil-out of the 3rd pressure shut-off valve and the other end of the change-over pilot valve
It is connected.
3. crane hydraulic control system according to claim 2, it is characterised in that the volume of the first pressure stop valve
It is 150bar to determine operating pressure, and the rated pressure of the second pressure stop valve and the 3rd pressure shut-off valve is
390bar。
4. crane hydraulic control system according to claim 2, it is characterised in that the pressure cut off reversal valve is two
Position four-way electromagnetic reversing valve.
5. according to the crane hydraulic control system any one of claim 1-4, it is characterised in that the hydraulic pump is
Bidirectional variable hydraulic pump.
6. according to the crane hydraulic control system any one of claim 1-4, it is characterised in that the first main oil
The system nominal pressure of road and second working connection is 420bar.
7. a kind of crane, it is characterised in that the crane includes executing agency and according to any one of claim 1-6
Described crane hydraulic control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001515.9U CN207178334U (en) | 2017-08-11 | 2017-08-11 | Crane hydraulic control system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721001515.9U CN207178334U (en) | 2017-08-11 | 2017-08-11 | Crane hydraulic control system and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207178334U true CN207178334U (en) | 2018-04-03 |
Family
ID=61740502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721001515.9U Expired - Fee Related CN207178334U (en) | 2017-08-11 | 2017-08-11 | Crane hydraulic control system and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207178334U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195033B (en) * | 2021-12-14 | 2024-05-28 | 上海中联重科桩工机械有限公司 | Winch speed reducer synchronous braking system and rotary drilling rig |
-
2017
- 2017-08-11 CN CN201721001515.9U patent/CN207178334U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114195033B (en) * | 2021-12-14 | 2024-05-28 | 上海中联重科桩工机械有限公司 | Winch speed reducer synchronous braking system and rotary drilling rig |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102633213B (en) | Energy regeneration type forklift hydraulic system | |
| CN107420384B (en) | Lifting device gravity potential energy pressure volume storage system | |
| CN102788055B (en) | Hydraulic system of wrecker | |
| CN113882459B (en) | Excavator energy recovery system and excavator | |
| CN205892594U (en) | Mining hoist engine hydraulic control system that links in step | |
| CN202379608U (en) | Boarding rotating hydraulic control system and crane provided with same | |
| CN102616705B (en) | Energy-saving forklift hydraulic system with energy recovery function | |
| CN204061375U (en) | A kind of system for hydraulic system of truck crane | |
| CN104074825B (en) | Two-way choice type interflow load-transducing multi-way valve | |
| CN103950870A (en) | Forklift hydraulic system with energy recovery and double-pump oil supply functions | |
| CN103613021B (en) | Winch hydraulic control system and engineering machinery | |
| CN202381427U (en) | Hydraulic oil cylinder synchronization control loop and crane using same | |
| CN210655875U (en) | Hydraulic control system of folding arm type lorry-mounted crane | |
| CN102434512A (en) | Hydraulic cylinder synchronization control loop and crane with same | |
| CN102561451A (en) | Energy optimization system for hydraulic excavator | |
| CN102465935B (en) | Pressure-compensated valve, load-sensitive hydraulic system and crane applying same | |
| CN103967858B (en) | Both arms handss rubber-tyred rescues machinery hydraulic system | |
| CN106284478A (en) | A kind of electric balancing cylinder potential energy recovery system | |
| CN110626948A (en) | Hydraulic Control System of Folding Boom Truck Mounted Crane | |
| CN103465957B (en) | The Multi-mode steering hydraulic control of a kind of manual switching and wheeled crane | |
| CN102943496B (en) | Potential energy recycling system of movable arm of excavator | |
| CN207178334U (en) | Crane hydraulic control system and crane | |
| CN202381429U (en) | Forward jumping prevention control valve of crane telescopic oil cylinder and crane telescopic system | |
| CN202542790U (en) | Energy-saving forklift hydraulic system with energy recycling | |
| CN203890013U (en) | Double-pump oil supply and energy recovery type forklift hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: WEICHAI POWER Co.,Ltd. Patentee after: Weichai Hydraulic Transmission Co.,Ltd. Address before: 261061 no.197a, Fushou East Street, high tech Industrial Development Zone, Weifang City, Shandong Province Patentee before: WEICHAI POWER Co.,Ltd. Patentee before: LINDE HYDRAULICS (CHINA) Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |