Crane hydraulic pilot control system, control method and crane
A hydraulic pilot and control system technology, used in fluid pressure actuation system testing, mechanical equipment, fluid pressure actuation devices, etc., can solve the problems of single pressure, single oil supply pressure, single oil supply pressure, etc., to reduce pressure Adjustment time, fast response speed, small effect of pressure regulation deviation
Active Publication Date: 2018-10-30
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology
However, according to the continuous improvement of market users' control comfort and operation safety, and to meet the needs of design standards in different regions, hydraulic control cranes have reflected some deficiencies, which are mainly manifested in: 1. Since the output pressure of the hydraulic pilot control is only related to the The inclination angle of the handle control is related, and electrical unauthorized interference cannot be performed, so when deceleration control is required, automatic deceleration cannot be realized
2. The existing hydraulic oil supply module can only provide a single oil supply pressure. Under different operating conditions of the crane, due to the single oil supply pressure, hierarchical control cannot be realized
The output pressure of the hydraulic pilot control system of the crane is single, and the output pressure cannot be adjusted according to the operating conditions of the system, and the control is not flexible
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[0022] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. The technical solution of the present invention will be described in various aspects below in conjunction with various figures and embodiments.
[0023] The terms "first" and "second" in the following are only used for description and have no other special meanings.
[0024] Such as figure...
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The invention discloses a crane hydraulic pilot control system, a control method and the crane thereof, and relates to the technical field of construction machinery, wherein the system includes: a pilot oil circuit for outputting pressure oil from an actuator, and a proportional pressure reducing valve (13) is arranged on the pilot oil In the middle of the road, the force limiter (17) detects the load of the crane, and sends a control signal to the proportional pressure reducing valve (13) according to the load, and the proportional pressure reducing valve (13) adjusts the oil pressure in the pilot oil circuit according to the control signal. The control system, control method and crane of the present invention output corresponding control signals according to different operating conditions through the force limiter, and adjust the control pressure output by the pilot oil circuit. The pressure can be pre-adjusted, and the oil supply pressure can be switched through the solenoid valve. It has the advantages of fast pressure regulation and reduces the pressure regulation time; the use of one-way valve + bypass damping as the oil supply module has the advantages of small pressure regulation deviation, high control precision and low cost, which can improve control comfort and operation safety.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a crane hydraulic pilot control system, a control method and a crane thereof. Background technique [0002] At present, the small and medium tonnage cranes produced by domestic manufacturers generally adopt the hydraulic pilot control mode, which has the advantages of low cost, simple control, high reliability and convenient maintenance compared with large tonnage electric control. However, according to the continuous improvement of market users' control comfort and operation safety, and to meet the needs of design standards in different regions, hydraulic control cranes have reflected some deficiencies, which are mainly manifested in: 1. Since the output pressure of the hydraulic pilot control is only related to the The inclination angle of the handle control is related, and electrical unauthorized interference cannot be performed, so when deceleration control is r...
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IPC IPC(8): F15B11/08F15B13/02F15B19/00
CPCF15B11/08F15B13/02F15B19/00
Inventor 胡小冬焦国旺周彬袁丛林
Owner XUZHOU HEAVY MASCH CO LTD