CN203702753U - Engineering machinery and hydraulic system - Google Patents
Engineering machinery and hydraulic system Download PDFInfo
- Publication number
- CN203702753U CN203702753U CN201320867615.5U CN201320867615U CN203702753U CN 203702753 U CN203702753 U CN 203702753U CN 201320867615 U CN201320867615 U CN 201320867615U CN 203702753 U CN203702753 U CN 203702753U
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- Prior art keywords
- hydraulic system
- valve
- oil
- brake
- pump
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Abstract
The utility model provides engineering machinery and a hydraulic system. The hydraulic system comprises a closed type hydraulic system constituted by an electric control two-way variable displacement pump and a driving motor and further comprises a traction motor connected with the driving motor in parallel, a brake used for braking the driving motor, a brake valve for controlling a brake oil line, a hydraulic pump used for supplying oil to the brake and recharging oil to the closed type hydraulic system, and switch valves arranged on two working oil lines of the traction motor. According to the hydraulic system provided by the utility model, the traction motor and the closed type hydraulic system comprising the driving motor, the output torque is controlled and adjusted through a pressure in a closed-loop manner, and the hydraulic system can meet the pull requirements of different loads and cannot produce impact.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of engineering machinery and hydraulic system.
Background technique
In the time that crawler crane is worked, the rope traction on traction elevator main actuating mechanism, and the wire rope on elevator is walked around sheave block and suspension hook, to complete the wiring of crawler crane lifting different multiplying.In prior art, traction hoist motor adopts open type hydraulic system, controls the speed of hoist motor by changing the aperture of selector valve, realizes rotating and reverse of motor by the commutation of selector valve.While commutation due to selector valve, exist compression shock, thereby can make the suffered tension force of wire rope that draws elevator increase much suddenly, and then the wire rope that draws elevator is very easily broken in the time of wiring.Patent CN201320053757 discloses the permanent tension force intelligent control system of a kind of oil field hydraulic logging winch, and this system realizes the control of steel wire rope tension by the open degree of dual control moment of torsion valve.But traction elevator needed moment of torsion and flow be compared with much smaller compared with main actuating mechanism, if adopt the method in CN201320053757 to control traction elevator, system cost is too high, controls too complicated.
Model utility content
In view of this, the utility model is intended to propose a kind of engineering machinery and hydraulic system, adopts open system to impact larger problem to solve traction elevator.
For achieving the above object, the technical solution of the utility model is achieved in that
On the one hand, the utility model discloses a kind of hydraulic system, comprise the closed type hydraulic system being formed by automatically controlled two-way variable displacement pump and drive motor, also comprise the traction motor in parallel with described drive motor, for brake described drive motor break, control the brake valve of described break oil circuit, for to described break fuel feeding and to the oil hydraulic pump of described closed type hydraulic system repairing and be arranged on the switch valve in two working oil path of described traction motor.
Further, also comprise the pressure transducer for detection of described automatically controlled bidirectional variable pump discharge pressure, described pressure transducer accesses described closed type hydraulic system by shuttle valve, two filler openings of described shuttle valve are communicated with two hydraulic fluid ports of described automatically controlled two-way variable displacement pump respectively, and the oil outlet of described shuttle valve is connected with described pressure transducer.
Further, also comprise the controller for controlling described automatically controlled two-way variable displacement pump, the signal of described pressure transducer transfers to described controller.
Further, also comprise combination instrument display device and for regulating the handle of described drive motor and described traction motor moment of torsion, described combination instrument display device is all connected with described controller signals with handle.
Further, be connected to the electromagnetic relief valve for controlling described oil hydraulic pump flow on the side, oil outlet place of described oil hydraulic pump.
Further, described oil hydraulic pump is quantitative gear pump.
Further, described brake valve is two-position four-way solenoid valve, and described brake valve obtains the rod chamber of connecting described oil hydraulic pump and described break when electric, makes the rod chamber draining of described break when described brake valve dead electricity.
Further, described switch valve is electromagnetic ball valve or manual ball valve.
Further, described traction motor is provided with brake cylinder and safety overflow valve.
On the other hand, the invention also discloses a kind of engineering machinery, described engineering machinery is provided with hydraulic system as above.
With respect to prior art, the utlity model has following advantage:
1, hydraulic system described in the utility model is in parallel with the closed type hydraulic system of drive motor by traction motor, can adjust output torque by pressure closed loop control, is suitable for unequally loaded pulling force demand, and can produce impact.
2, hydraulic system described in the utility model is in parallel with the closed type hydraulic system of drive motor by traction motor, can be by the closed type hydraulic system of switch valve switching controls traction motor and drive motor, do not need extra oil sources, control simply, system cost is lower.
3, hydraulic system described in the utility model is provided with controller and combination instrument display instrument, the torque parameter of traction motor can be shown in real time, and convenient operation personnel understand status of equipment, and prevention has an accident.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the principle schematic of the hydraulic circuit of hydraulic system described in the utility model embodiment;
Fig. 2 is the connection diagram of the control circuit of hydraulic system described in the utility model embodiment.
Description of reference numerals:
The automatically controlled two-way variable displacement pump of 1-, 2-pressure transducer, 3-shuttle valve, 4-break, 5-drive motor, 6-switch valve, 7-traction motor, 8-brake cylinder, 9-safety overflow valve, 10-electromagnetic relief valve, 11-quantitative gear pump, 12-brake valve, 13-controller, 14-handle, 15-combination instrument display device.
Embodiment
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the utility model can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.
Fig. 1 and Fig. 2 are the relevant drawings of the present embodiment, the principle schematic of the hydraulic circuit that wherein Fig. 1 is hydraulic system, Fig. 2 is the connection diagram of the control circuit of hydraulic system, as shown in FIG., hydraulic system described in the present embodiment mainly comprises the closed type hydraulic system being made up of automatically controlled two-way variable displacement pump 1 and drive motor 5, also comprise the traction motor in parallel with drive motor 57, for braking the break 4 of drive motor 5, control the brake valve 12 of break 4 oil circuits, for to break 4 fuel feeding and to the quantitative gear pump 11 of closed type hydraulic system repairing, be arranged on the switch valve 6 in 7 two working oil path of traction motor, for detection of the pressure transducer 2 of automatically controlled two-way variable displacement pump 1 outlet pressure, for controlling the controller 13 of automatically controlled two-way variable displacement pump 1, for regulating the handle 14 of drive motor 5 and traction motor 7 moments of torsion and the combination instrument display device 15 for real-time demonstration moment of torsion.This pressure transducer 2 accesses closed type hydraulic system by shuttle valve 3, and two filler openings of shuttle valve 3 are communicated with two hydraulic fluid ports of automatically controlled two-way variable displacement pump 1 respectively, and the oil outlet of shuttle valve 3 is connected with pressure transducer 2.The signal of this pressure transducer 2 transfers to controller 13, and this combination instrument display device 15 is all connected with controller 13 signals with handle 14.At the also other electromagnetic relief valve 10 that is connected to the flow for controlling this quantitative gear pump 11 of the oil outlet place of this quantitative gear pump 11; This quantitative gear pump 11 can also replace to other forms of oil hydraulic pump.
This brake valve 12 is two-position four-way solenoid valve, when brake valve 12 connect the rod chamber of quantitative gear pump 11 and break 4 when electric, make break 4 remove the braking to drive motor 5, in the time of brake valve 12 dead electricity, make the rod chamber draining of break 4, and then drive motor 5 is braked.Switch valve 6 is electromagnetic ball valve, and in the time that these two switch valves 6 are all connected, traction motor 7 can be driven by automatically controlled two-way variable displacement pump 1.This traction motor 7 is also provided with brake cylinder 8 and safety overflow valve 9.
In the present embodiment, quantitative gear pump 11, from fuel tank oil suction, is given closed type hydraulic system repairing, and controls the keying of break 4 by brake valve 12; Traction motor 7 is in parallel with closed type hydraulic system, realizes the switching of action by switch valve 6; When the electromagnet of brake valve 12 is in power failure state, break 4 is braked drive motor 5, and now drive motor 5 does not rotate, and traction motor 7 starts to rotate.With respect to prior art, the present embodiment has following advantage:
1, this hydraulic system is in parallel with the closed type hydraulic system of drive motor 5 by traction motor 7, can adjust output torque by pressure closed loop control, is suitable for unequally loaded pulling force demand, and can produce impact.
2, this hydraulic system is in parallel with the closed type hydraulic system of drive motor 5 by traction motor 7, can, by the closed type hydraulic system of switch valve 6 switching controls traction motors 7 and drive motor 5, not need extra oil sources, controls simply, and system cost is lower.
3, this hydraulic system is provided with controller 13 and combination instrument display device, the torque parameter of traction motor 7 can be shown in real time, and convenient operation personnel understand status of equipment, and prevention has an accident.
In other embodiments, this switch valve 6 can be also manual ball valve, and the function of this handle 14 also can be realized by the Bidirectional balanced valve without pressure setting.
Except above-mentioned hydraulic system, the utility model embodiment also provides a kind of engineering machinery that is provided with above-mentioned hydraulic system, and as crawler crane etc., the structure of other each several part of this project machinery, with reference to prior art, repeats no more herein.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a hydraulic system, it is characterized in that, comprise the closed type hydraulic system being formed by automatically controlled two-way variable displacement pump (1) and drive motor (5), also comprise the traction motor (7) in parallel with described drive motor (5), for brake described drive motor (5) break (4), control the brake valve (12) of described break (4) oil circuit, for to described break (4) fuel feeding and to the oil hydraulic pump of described closed type hydraulic system repairing and be arranged on the switch valve (6) in (7) two working oil path of described traction motor.
2. hydraulic system according to claim 1, it is characterized in that, also comprise the pressure transducer (2) for detection of described automatically controlled two-way variable displacement pump (1) outlet pressure, described pressure transducer (2) accesses described closed type hydraulic system by shuttle valve (3), two filler openings of described shuttle valve (3) are communicated with two hydraulic fluid ports of described automatically controlled two-way variable displacement pump (1) respectively, and the oil outlet of described shuttle valve (3) is connected with described pressure transducer (2).
3. hydraulic system according to claim 2, is characterized in that, also comprises the controller (13) for controlling described automatically controlled two-way variable displacement pump (1), and the signal of described pressure transducer (2) transfers to described controller (13).
4. hydraulic system according to claim 3, it is characterized in that, also comprise combination instrument display device (15) and for regulating the handle (14) of described drive motor (5) and described traction motor (7) moment of torsion, described combination instrument display device (15) is all connected with described controller (13) signal with handle (14).
5. hydraulic system according to claim 4, is characterized in that, is connected to the electromagnetic relief valve (10) for controlling described oil hydraulic pump flow on the side, oil outlet place of described oil hydraulic pump.
6. according to the hydraulic system described in claim 1 to 5 any one, it is characterized in that, described oil hydraulic pump is quantitative gear pump (11).
7. according to the hydraulic system described in claim 1 to 5 any one, it is characterized in that, described brake valve (12) is two-position four-way solenoid valve, described brake valve (12) connect the rod chamber of described oil hydraulic pump and described break (4) when electric, when described brake valve (12) dead electricity, make the rod chamber draining of described break (4).
8. according to the hydraulic system described in claim 1 to 5 any one, it is characterized in that, described switch valve (6) is electromagnetic ball valve or manual ball valve.
9. according to the hydraulic system described in claim 1 to 5 any one, it is characterized in that, described traction motor (7) is provided with brake cylinder (8) and safety overflow valve (9).
10. an engineering machinery, is characterized in that, described engineering machinery is provided with the hydraulic system as described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320867615.5U CN203702753U (en) | 2013-12-26 | 2013-12-26 | Engineering machinery and hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320867615.5U CN203702753U (en) | 2013-12-26 | 2013-12-26 | Engineering machinery and hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702753U true CN203702753U (en) | 2014-07-09 |
Family
ID=51053204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320867615.5U Expired - Fee Related CN203702753U (en) | 2013-12-26 | 2013-12-26 | Engineering machinery and hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702753U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712207A (en) * | 2015-11-24 | 2016-06-29 | 徐州重型机械有限公司 | Superlift hoisting control system and hoisting machinery |
| CN109312569A (en) * | 2016-04-11 | 2019-02-05 | 德国施维英有限公司 | Electro-hydraulic control circuit for large-scale executor |
| CN114314401A (en) * | 2022-03-07 | 2022-04-12 | 徐州徐工基础工程机械有限公司 | Closed type winch emergency brake control system, equipment and method |
-
2013
- 2013-12-26 CN CN201320867615.5U patent/CN203702753U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105712207A (en) * | 2015-11-24 | 2016-06-29 | 徐州重型机械有限公司 | Superlift hoisting control system and hoisting machinery |
| CN105712207B (en) * | 2015-11-24 | 2018-01-16 | 徐州重型机械有限公司 | Setting-up elevator control system and hoisting machinery |
| CN109312569A (en) * | 2016-04-11 | 2019-02-05 | 德国施维英有限公司 | Electro-hydraulic control circuit for large-scale executor |
| CN114314401A (en) * | 2022-03-07 | 2022-04-12 | 徐州徐工基础工程机械有限公司 | Closed type winch emergency brake control system, equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20171226 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |