CN204661185U - Crane rotation fine motion hydraulic efficiency pressure system - Google Patents
Crane rotation fine motion hydraulic efficiency pressure system Download PDFInfo
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- CN204661185U CN204661185U CN201520311997.2U CN201520311997U CN204661185U CN 204661185 U CN204661185 U CN 204661185U CN 201520311997 U CN201520311997 U CN 201520311997U CN 204661185 U CN204661185 U CN 204661185U
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Abstract
The utility model relates to a kind of crane rotation fine motion hydraulic efficiency pressure system, comprise variable displacement pump system, fixed displacement motor and revolution flow bypass system, variable displacement pump system is connected with fixed displacement motor and revolution flow bypass system, revolution flow bypass system is parallel with the first safety overflow valve and the second safety overflow valve.It is simple that the utility model has control, even if when Hydraulic Pump exports high flow capacity, by the bypass shunt of electromagnetic proportional valve, whole swing type mechanism equally can be allowed to obtain low-down speed of revolutions, mild shock-free electrodeless variable-speed, avoids the advantage of vector operation handle sensitivity on the impact of whole speeds control stability simultaneously.
Description
Technical field
This patent relates to a kind of hydraulic efficiency pressure system, particularly one and is applicable to crane rotation mechanism fine motion hydraulic efficiency pressure system.
Background technology
Hydraulic pressure is generally used in the revolution action of various hoisting crane as propulsion source.In order to enhance productivity, often wish that revolution obtains fair speed, but in order to safety, sometimes wish again to obtain lower speed.
Control for realizing effective velocity, the electrodeless conversion of high low speed, old-fashioned way is adopt automatically controlled variable displacement pump and vector operation handle mostly, forms speed control system.This cover system, achieves the controllability of rotary system speed to a certain extent, also brings another problem to system: the sensitivity of operating handle determines the stability of whole system simultaneously.When handle arrange too sensitive, handle action a little, revolution will obtain fair speed, this situation brings huge potential safety hazard to production, if the not too sensitivity that handle is arranged, even if handle has significantly action, revolution is also difficult to obtain the speed expected, can reduce production efficiency so again.
Utility model content
The purpose of this utility model is to overcome above deficiency, there is provided one to provide and effectively control speed of revolutions, revolution electrodeless variable-speed, speed of revolutions does not limit by vector handle sensitivity, even if under under pump high discharge capacity, maximum position situation shifted onto by vector handle, revolution equally can obtain the crane rotation fine motion hydraulic efficiency pressure system of low speed.
The purpose of this utility model is achieved through the following technical solutions: a kind of crane rotation fine motion hydraulic efficiency pressure system, comprise variable displacement pump system, fixed displacement motor and revolution flow bypass system, variable displacement pump system is connected with fixed displacement motor and revolution flow bypass system, revolution flow bypass system comprises the first check valve, second check valve, 3rd check valve, 4th check valve and electromagnetic proportional valve, first check valve, electromagnetic proportional valve and the second check valve form the first unidirectional circuit, 3rd check valve, 4th check valve and electromagnetic proportional valve form the second unidirectional circuit, first unidirectional circuit and the second unidirectional circuit, revolution flow bypass system is parallel with the first safety overflow valve and the second safety overflow valve.
By pass valve is security of system valve, and ensure that system pressure is not overproof, fixed displacement motor is system end executive device, for revolution provides power; Variable displacement pump system is system dynamic source, and for described fixed displacement motor provides power, flow bypass Systematical control variable displacement pump system flows into the flow of fixed displacement motor, thus controls the speed of revolutions of whole rotary system.
The utility model compared with prior art has the following advantages: control simple, even if when Hydraulic Pump exports high flow capacity, by the bypass shunt of electromagnetic proportional valve, whole swing type mechanism equally can be allowed to obtain low-down speed of revolutions, mild shock-free electrodeless variable-speed, avoids the impact of vector operation handle sensitivity on whole speeds control stability simultaneously
accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
Number in the figure: 1-variable displacement pump system, 2-fixed displacement motor, 3-turn round flow bypass system, 4-first check valve, 5-second check valve, 6-the 3rd check valve, 7-the 4th check valve, 8-electromagnetic proportional valve, 9-first safety overflow valve, 10-second safety overflow valve.
detailed description of the invention:
In order to deepen understanding of the present utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, and this embodiment, only for explaining the utility model, does not form the restriction to the utility model protection domain.
As Fig. 1 shows the embodiment of a kind of crane rotation fine motion of the utility model hydraulic efficiency pressure system: comprise variable displacement pump system 1, fixed displacement motor 2 and revolution flow bypass system 3, variable displacement pump system 1 is connected with fixed displacement motor 2 and revolution flow bypass system 3, revolution flow bypass system 3 comprises the first check valve 4, second check valve 5, 3rd check valve 6, 4th check valve 7 and electromagnetic proportional valve 8, first check valve 4, electromagnetic proportional valve 8 and the second check valve 5 form the first unidirectional circuit, 3rd check valve 6, 4th check valve 7 and electromagnetic proportional valve 8 form the second unidirectional circuit, first unidirectional circuit and the second unidirectional circuit, revolution flow bypass system 3 is parallel with the first safety overflow valve 9 and the second safety overflow valve 10.
By pass valve is security of system valve, ensure that system pressure is not overproof, fixed displacement motor is system end executive device, for revolution provides power, variable displacement pump system is system dynamic source, for described fixed displacement motor provides power, and flow bypass system, control the flow that described variable displacement pump system flows into fixed displacement motor, thus control the speed of revolutions of whole rotary system.
A, when variable displacement pump system by A mouth export fluid provide power for fixed displacement motor time, fine motion system electromagnetic valve obtains electric. conducting bleed off circuit; Bleed off circuit flows to: the first check valve-proportion magnetic valve the-the second check valve-oil return line B mouth.
B, when controllable capacity pump by B mouth export fluid provide power for fixed displacement motor time, fine motion system electromagnetic valve obtains electric. conducting bleed off circuit; Bleed off circuit flows to: three check valve-proportion magnetic valve-four check valves-oil return line A mouth.
It is simple that the utility model has structure, control simple, even if when Hydraulic Pump exports high flow capacity, by the bypass shunt of electromagnetic proportional valve, whole swing type mechanism equally can be allowed to obtain low-down speed of revolutions, and CY3 is apportioning valve, and his bypass flow decides by the voltage swing added thereon, such revolution will realize mild shock-free electrodeless variable-speed, and avoid vector operation handle sensitivity affects advantage to whole speeds control stability simultaneously.
The another statement of applicant, the utility model illustrates implementation method of the present utility model and apparatus structure by above-described embodiment, but the utility model is not limited to above-mentioned embodiment, namely do not mean that the utility model must rely on said method and structure could be implemented.Person of ordinary skill in the field should understand; to any improvement of the present utility model; implementation method equivalence selected by the utility model is replaced and the interpolation of step, concrete way choice etc., all drops within protection domain of the present utility model and scope of disclosure.
The utility model is not limited to above-mentioned embodiment, and all employings and the utility model analog structure and method thereof realize all modes of the utility model object, all within protection domain of the present utility model.
Claims (2)
1. a crane rotation fine motion hydraulic efficiency pressure system, it is characterized in that: comprise variable displacement pump system (1), fixed displacement motor (2) and revolution flow bypass system (3), described variable displacement pump system (1) is connected with fixed displacement motor (2) and revolution flow bypass system (3, described revolution flow bypass system (3) comprises the first check valve (4), second check valve (5), 3rd check valve (6), 4th check valve (7) and electromagnetic proportional valve (8), described first check valve (4), electromagnetic proportional valve (8) and the second check valve (5) form the first unidirectional circuit, described 3rd check valve (6), 4th check valve (7) and electromagnetic proportional valve (8) form the second unidirectional circuit, described first unidirectional circuit and the second unidirectional circuit.
2. a kind of crane rotation fine motion hydraulic efficiency pressure system according to claim 1, is characterized in that: on described revolution flow bypass system (3), be parallel with the first safety overflow valve (9) and the second safety overflow valve (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311997.2U CN204661185U (en) | 2015-05-15 | 2015-05-15 | Crane rotation fine motion hydraulic efficiency pressure system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520311997.2U CN204661185U (en) | 2015-05-15 | 2015-05-15 | Crane rotation fine motion hydraulic efficiency pressure system |
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| Publication Number | Publication Date |
|---|---|
| CN204661185U true CN204661185U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520311997.2U Active CN204661185U (en) | 2015-05-15 | 2015-05-15 | Crane rotation fine motion hydraulic efficiency pressure system |
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| CN (1) | CN204661185U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111039178A (en) * | 2019-12-26 | 2020-04-21 | 北汽福田汽车股份有限公司 | Vehicle crane control method and device and vehicle crane |
| CN111677724A (en) * | 2020-05-26 | 2020-09-18 | 上海中联重科桩工机械有限公司 | Control method, controller and storage medium for engineering machinery hydraulic system |
-
2015
- 2015-05-15 CN CN201520311997.2U patent/CN204661185U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111039178A (en) * | 2019-12-26 | 2020-04-21 | 北汽福田汽车股份有限公司 | Vehicle crane control method and device and vehicle crane |
| CN111039178B (en) * | 2019-12-26 | 2021-02-02 | 河北雷萨重型工程机械有限责任公司 | Vehicle crane control method and device and vehicle crane |
| CN111677724A (en) * | 2020-05-26 | 2020-09-18 | 上海中联重科桩工机械有限公司 | Control method, controller and storage medium for engineering machinery hydraulic system |
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