CN101649849B - Hydraulic motor brake circuit - Google Patents
Hydraulic motor brake circuit Download PDFInfo
- Publication number
- CN101649849B CN101649849B CN2008100225847A CN200810022584A CN101649849B CN 101649849 B CN101649849 B CN 101649849B CN 2008100225847 A CN2008100225847 A CN 2008100225847A CN 200810022584 A CN200810022584 A CN 200810022584A CN 101649849 B CN101649849 B CN 101649849B
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- 239000012530 fluid Substances 0.000 claims description 54
- 230000000694 effects Effects 0.000 claims description 13
- 230000008676 import Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 49
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A hydraulic motor brake circuit. Relates to a brake control oil circuit of a hydraulic motor. The hydraulic oil circuit is in a cut-off state when the hydraulic oil circuit stops working, even if the hydraulic motor moves due to slope slipping, the driving oil circuit cannot be driven to run, hydraulic elements such as a pump and the like are prevented from being damaged due to reverse running of the hydraulic motor, and meanwhile, a reverse running resistance is loaded on the hydraulic motor. The hydraulic brake system comprises a brake oil way and a control loop which is composed of a three-position three-way hydraulic control reversing valve, a one-way valve I, a one-way valve II, a one-way valve VII and a one-way valve VIII and has the functions of reversing and locking the oil way. The invention can firstly ensure that the power oil can reliably drive the hydraulic motor to operate; then, a control loop which has the functions of reversing and locking an oil way is arranged in the loop, so that the automatic locking of the loop is realized, and the functions of protecting a pump, a hydraulic element and the like during the shutdown are realized; the crawler crane can walk at a constant speed when going downhill, and cannot run at an accelerated speed under the action of gravity, so that the phenomenon of out-of-control is avoided.
Description
Technical field
The present invention relates to a kind of hydraulic driving control oil channel, relate in particular to a kind of braking control oil channel of oil hydraulic motor.
Background technique
At present, along with the maturation of hydraulics, expedited the emergence of efficiently, hydraulic driving power source---oil hydraulic motor stably.On some large-scale engineering equipments,, just adopt oil hydraulic motor as driving its power source that goes such as comparatively advanced crawler crane.Oil hydraulic motor in use needs the comparatively stable hydraulic control circuit of performance to drive, control oil hydraulic motor work.Existing oil hydraulic motor with and control oil channel can satisfy general job requirement, such as guaranteeing its forward and back walking reposefully, start the pressure oil that can provide one road feed flow to press parking device to discharge behind the oil circuit.Large-scale engineering machinery equipment with fluid motor-driven is water brake wheel cylinder and the spring brake cylinder that adopts aerodynamic brake wheel cylinder, spring brake cylinder principle on the similar lorry at the Parking state.There is a problem in the parking device of this structure, if be exactly vehicle parks on a slope time, only relies on the braking force of spring to be difficult to guarantee that it stably stops.Light weight component on the slope maybe be greater than the surface friction drag of spring brake cylinder, and at this moment vehicle can slip the slope, and this type jumbo long stroke takes place slips and slopingly possibly cause serious accident; When the slide slope of short stroke took place, the traveller of vehicle can oppositely drive the oil circuit work that drives, and the hydraulic oil inverted running can damage pump in the hydraulic circuit, hydraulic element etc.
Summary of the invention
The present invention is on the basis of existing technology through increasing the control loop that has switching-over and the effect of locking oil circuit concurrently on the driving oil circuit; Make oil circuit when hydraulic circuit quits work, be cut-off state; Even oil hydraulic motor moves because of slipping the slope; Can not make to drive the oil circuit operation yet, avoid damaging hydraulic element such as pump, loaded the brake circuit of hydraulic motor of an antikinesis resistance simultaneously yet to oil hydraulic motor because of the oil hydraulic motor antikinesis.At the uniform velocity walk when brake circuit of hydraulic motor of the present invention can make the crawler crane descending, can under action of gravity, not give it the gun, avoid occurring out-of-control phenomenon.
Technological scheme of the present invention is: it comprises A, the B hydraulic fluid port that is connected with power oil-duct, the A1 that is connected with oil hydraulic motor, B1 hydraulic fluid port; Be provided with brake circuit between A, the B hydraulic fluid port, the Br mouth of brake circuit is communicated with the hydraulic machinery break of oil hydraulic motor; Be connected with a pair of relief valve that is used to regulate A1, B1 hydraulic fluid port pressure between A1, B1 hydraulic fluid port, it also comprises the control loop that has switching-over and the effect of locking oil circuit concurrently that is made up of 3-position-3-way pilot operated directional control valve, one-way valve one, one-way valve two, one-way valve seven, one-way valve eight; The B hydraulic fluid port connects one-way valve two that the one-way valve one, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve control mouth near B hydraulic fluid port side respectively; The A hydraulic fluid port connects one-way valve seven that the one-way valve eight, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve control mouth near A hydraulic fluid port side respectively; The forward mouth of one-way valve one, the forward mouth of one-way valve eight link to each other with 3-position-3-way liquid controlled reversing valve outlet port; Reverse mouthful of one-way valve two links to each other with the B1 hydraulic fluid port, and reverse mouthful of one-way valve seven links to each other with the A1 hydraulic fluid port, and two imports of 3-position-3-way pilot operated directional control valve link to each other with A1 hydraulic fluid port, B1 hydraulic fluid port respectively.
Described brake circuit comprises shuttle valve, reduction valve, and shuttle valve is connected between A, the B hydraulic fluid port, and the import of reduction valve connects the outlet of shuttle valve, and the outlet of reduction valve is the Br mouth.
Oil circuit of the present invention can guarantee that at first power oil can be reliably forming the loop between A, A1, B1, the B mouth or between the B, B1, A1, A mouth, thereby drives hydraulic slave motor run; Then, in the loop, be provided with the control loop that has switching-over and the effect of locking oil circuit concurrently, one-way valve two, one-way valve seven in the control loop have been realized automatically locking of loop, have played the effect that when shutting down, also can protect pump, hydraulic element etc.; When having guaranteed under the sloping situation of slide, also not go here and there oil and proper functioning oil return between B, the A hydraulic fluid port, the one-way valve one in the control loop, one-way valve eight stablize the back pressure effect of oil circuit operation; 3-position-3-way pilot operated directional control valve in the control loop utilizes the pressure of oil circuit self to realize synchronization control, has saved the pattern of original employing solenoid valve switching-over, when a side oil-feed, and the synchronous communicating of this side, the opposite side oil return, the reliability of switching-over is high.Two hydraulic control mouths of 3-position-3-way selector valve are provided with damper respectively, guarantee that switching-over steadily.
Description of drawings
Fig. 1 is a hydraulic schematic diagram of the present invention
1 is one-way valve one, 2nd among the figure, one-way valve two, 3rd, control loop, the 4th, relief valve B, the 5th, relief valve A, the 6th, 3-position-3-way pilot operated directional control valve, the 7th, one-way valve seven, 8th, one-way valve eight, 9th, shuttle valve, the 10th, reduction valve, the 11st, brake circuit;
Fig. 2 is the structural representation by the brake valve of the utility model hydraulic principle enforcement
12 is valve pieces among the figure; The 13rd, lead to the oil duct that 3-position-3-way pilot operated directional control valve B side is controlled mouth by the B hydraulic fluid port, the 14th, lead to the oil duct that 3-position-3-way pilot operated directional control valve A side is controlled mouth, the 15th, one-way valve main aperture by the A hydraulic fluid port; The 16th, relief valve main aperture, the 17th, 3-position-3-way pilot operated directional control valve main aperture;
Fig. 3 is the left view of Fig. 2
18 is brake circuit main apertures among the figure;
Analyse and observe the position among Fig. 3 and be C-C sectional plane among Fig. 2.
Fig. 4 is the plan view of Fig. 3
Fig. 5 is a B-B sectional view among Fig. 3
Fig. 6 is an A-A sectional view among Fig. 1
Embodiment
As shown in Figure 1, the present invention includes the A hydraulic fluid port, the B hydraulic fluid port that are connected with power oil-duct, the A1 that is connected with oil hydraulic motor, B1 hydraulic fluid port; Be provided with brake circuit 11 between A, the B hydraulic fluid port, the Br mouth of brake circuit 11 is communicated with the hydraulic machinery break of oil hydraulic motor; Be connected with a pair of be used to regulate A1, the relief valve B4 of B1 hydraulic fluid port pressure, relief valve A5 between A1, B1 hydraulic fluid port, it also comprises the control loop 3 that has switching-over and the effect of locking oil circuit concurrently that is made up of 3-position-3-way pilot operated directional control valve 6, one-way valve 1, one-way valve 22, one-way valve 77, one-way valve 88; The B hydraulic fluid port connects one-way valve 22 that the one-way valve 1, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve 6 control mouth near B hydraulic fluid port side respectively; The A hydraulic fluid port connects one-way valve 77 that the one-way valve 88, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve 6 control mouth near A hydraulic fluid port side respectively; The forward mouth of one-way valve 1, the forward mouth of one-way valve 88 link to each other with the outlet of 3-position-3-way pilot operated directional control valve 6; Reverse mouthful of one-way valve 22 links to each other with the B1 hydraulic fluid port, and reverse mouthful of one-way valve 77 links to each other with the A1 hydraulic fluid port, and two imports of 3-position-3-way pilot operated directional control valve 6 link to each other with A1 hydraulic fluid port, B1 hydraulic fluid port respectively.
Brake circuit comprises shuttle valve 9, reduction valve 10, and shuttle valve 9 is connected between A, the B hydraulic fluid port, and the import of reduction valve 10 connects shuttle valve 9, and the outlet of reduction valve 10 is the Br mouth.
In addition, can connect an auxiliary oil sources, when working,, prevent emptying phenomenon, cause motor to damage to the repairing respectively of motor two chambeies at the motor high speed rotating or after shutting down the long period like the S mouth among Fig. 1.
Between the outlet of shuttle valve 9 and reduction valve 10 imports, a Pressure testing mouth G is set, as the monitoring of motor operations pressure.
Relief valve A5, relief valve B4 effect have: when hoist was walked on rough road surface, hydraulic circuit produced surge pressure, and relief valve A5, relief valve B4 can discharge high pressure rapidly, thereby played the effect of protection motor.
The brake valve of accordinging to hydraulic principle enforcement of the present invention is offered three horizontal main apertures on valve body 12 shown in Fig. 2～6, be respectively one-way valve master control 15; Relief valve main aperture 16; 3-position-3-way pilot operated directional control valve main aperture 17, and a vertical main aperture, brake circuit main aperture 18; Each hydraulic fluid port is opened on the valve body 12 and with each main aperture according to the Connecting format of schematic diagram and is connected.Wherein, A hydraulic fluid port, B hydraulic fluid port inlet offer respectively be communicated with 3-position-3-way pilot operated directional control valve main aperture 17 lead to the damping oil duct 13 of 3-position-3-way pilot operated directional control valve B side control mouthful by the B hydraulic fluid port, lead to the oil duct 14 of 3-position-3-way pilot operated directional control valve A side control mouthful by the A hydraulic fluid port.The oil duct that is arranged in the valve body through the Connecting format according to schematic diagram between each main aperture interconnects.
The above-mentioned brake valve of implementing according to hydraulic principle of the present invention is mainly used in the hydraulic system of crawler crane, and the control running motor particularly at descending is, can automatically lock oil hydraulic motor, prevents to glide voluntarily, causes the accident, and plays the safety protection effect.Pilot operated directional control valve wherein is used for the work of main control system running motor; The direction of one-way valve control hydraulic flow; Prevent to flow backwards to oil pump, play the effect of protection pump, bidirectional relief valve control load pressure at load effect hydraulic oil of following time; Make each actuator port reach automatic overflow when setting, traveller is shielded.The braking system of crawler crane generally can not be born high pressure, therefore in this valve set inside a reduction valve, guarantee that the pressure of control oil channel is no more than specified value, thereby play the effect of protection break.At last, this brake valve is installed on the oil hydraulic motor through connecting plate, and is easy for installation, reliable performance.
Claims (2)
1. brake circuit of hydraulic motor, it comprises A, the B hydraulic fluid port that is connected with power oil-duct, the A1 that is connected with oil hydraulic motor, B1 hydraulic fluid port; Be provided with brake circuit between A, the B hydraulic fluid port, the Br mouth of brake circuit is communicated with the hydraulic machinery break of oil hydraulic motor; Be connected with a pair of relief valve that is used to regulate A1, B1 hydraulic fluid port pressure between A1, B1 hydraulic fluid port, brake circuit of hydraulic motor also comprises the control loop that has switching-over and the effect of locking oil circuit concurrently that is made up of 3-position-3-way pilot operated directional control valve, one-way valve one, one-way valve two, one-way valve seven, one-way valve eight; The B hydraulic fluid port connects one-way valve two that the one-way valve one, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve control mouth near B hydraulic fluid port side respectively; The A hydraulic fluid port connects one-way valve seven that the one-way valve eight, forward of reverse setting be provided with and the 3-position-3-way pilot operated directional control valve control mouth near A hydraulic fluid port side respectively; The forward mouth of one-way valve one, the forward mouth of one-way valve eight link to each other with 3-position-3-way liquid controlled reversing valve outlet port; Reverse mouthful of one-way valve two links to each other with the B1 hydraulic fluid port; Reverse mouthful of one-way valve seven links to each other with the A1 hydraulic fluid port; Two imports of 3-position-3-way pilot operated directional control valve link to each other with A1 hydraulic fluid port, B1 hydraulic fluid port respectively, it is characterized in that, said brake circuit also is provided with the inlet that connects said one-way valve one, one-way valve eight respectively; And the S hydraulic fluid port of 3-position-3-way pilot operated directional control valve meta, said S hydraulic fluid port connects auxiliary oil sources.
2. a kind of brake circuit of hydraulic motor according to claim 1 is characterized in that described brake circuit comprises shuttle valve, reduction valve, and shuttle valve is connected between A, the B hydraulic fluid port, and the import of reduction valve connects the outlet of shuttle valve, and the outlet of reduction valve is the Br mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100225847A CN101649849B (en) | 2008-08-14 | 2008-08-14 | Hydraulic motor brake circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100225847A CN101649849B (en) | 2008-08-14 | 2008-08-14 | Hydraulic motor brake circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101649849A CN101649849A (en) | 2010-02-17 |
| CN101649849B true CN101649849B (en) | 2012-05-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100225847A Expired - Fee Related CN101649849B (en) | 2008-08-14 | 2008-08-14 | Hydraulic motor brake circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN101649849B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865173B (en) * | 2010-07-21 | 2012-11-21 | 胡斌杰 | Hydraulic motor control valve |
| CN102852870B (en) * | 2012-08-20 | 2015-09-09 | 三一重工股份有限公司 | Open type hydraulic system and engineering machinery |
| ITUD20120182A1 (en) * | 2012-10-29 | 2014-04-30 | Pmp Pro Mec S P A | "SHUTTLE VALVE FOR VEHICLE MOTOR CONTROL CIRCUIT" |
| CN103511379B (en) * | 2013-09-26 | 2016-08-24 | 徐州重型机械有限公司 | A kind of crane, hydraulic system and switching valve |
| CN105736502B (en) * | 2016-04-22 | 2018-08-28 | 泉州鑫豪工程机械科技有限公司 | A kind of balance control valve for walk motor with hydraulic pressure |
| CN105855755B (en) * | 2016-05-10 | 2018-02-13 | 成都熊谷加世电器有限公司 | A kind of internal welding machine pneumatic system |
| CN106402063B (en) * | 2016-12-20 | 2019-07-26 | 徐工消防安全装备有限公司 | Travelling control valve group, hydraulic closed running gear and aerial working platform vehicle |
| CN107906060A (en) * | 2017-10-26 | 2018-04-13 | 浙江大学 | Vehicle parallel type hydraulic hybrid power system and its method with energy regenerating release function |
| CN109973452B (en) * | 2017-12-28 | 2024-01-23 | 中国铁建高新装备股份有限公司 | Reverse braking control valve for hydraulic traveling system |
| CN108457916B (en) * | 2018-02-28 | 2024-03-26 | 无锡海核装备科技有限公司 | Hydraulic system for rotary vane type hydraulic steering engine |
| CN110671496A (en) * | 2019-10-16 | 2020-01-10 | 福建晋工机械有限公司 | Automatic variable walking motor assembly, hydraulic driving walking control system and application thereof |
| CN111660439B (en) * | 2020-06-16 | 2022-06-24 | 邵立坤 | Motor control device for concrete mixer truck |
| CN113404734B (en) * | 2021-07-28 | 2022-08-05 | 柳州柳工挖掘机有限公司 | Pile hammer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1573126A (en) * | 2003-05-22 | 2005-02-02 | 神钢建设机械株式会社 | Control device for working machine |
| CN2931565Y (en) * | 2005-12-31 | 2007-08-08 | 秦皇岛市北戴河通联路桥机械有限公司 | Unpowered descent control device of special passenger transport line beam raising machine |
-
2008
- 2008-08-14 CN CN2008100225847A patent/CN101649849B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1573126A (en) * | 2003-05-22 | 2005-02-02 | 神钢建设机械株式会社 | Control device for working machine |
| CN2931565Y (en) * | 2005-12-31 | 2007-08-08 | 秦皇岛市北戴河通联路桥机械有限公司 | Unpowered descent control device of special passenger transport line beam raising machine |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2004-225867A 2004.08.12 |
| JP特开平10-152866A 1988.06.09 |
Also Published As
| Publication number | Publication date |
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| CN101649849A (en) | 2010-02-17 |
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Granted publication date: 20120523 Termination date: 20150814 |
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