Hydraulic system for variable amplitude control of suspension arm and control method
A hydraulic system and boom technology, which is applied in the field of cranes, can solve problems such as oil pipe bursting, the first luffing hydraulic motor and the second luffing hydraulic motor cannot rotate synchronously, and threaten operation safety, etc.
Pending Publication Date: 2022-02-18
SOUTH CHINA MARINE MACHINERY
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Problems solved by technology
When the oil pressure suddenly increases, the pressure of the hydraulic system of the crane is unbalanced, which may cause the hydraulic components to fail or be damaged, resulting in oil leakage from the oil pipe, or even a burst of the oil pipe, which will seriously threaten the safety of the operation
[0003] In order to solve the above technical problems; the patent document in China with the application number 201811289896.4; the publication date is 2020.5.8 discloses a crane hydraulic system and working method; it discloses the luffing system; The oil pipeline is connected to one end of the first luffing hydraulic motor; the other luffing ascending oil supply pipeline is connected to one end of the second luffing hydraulic motor; and the first luffing hydraulic motor is connected through a luffing descending oil supply pipeline The other end of the luffing oil supply pipeline is connected to one end of the second luffing hydraulic motor; but there is no communication between the two luffing rising oil supply pipelines and the two luffing descending oil supply pipelines; When the flow of hydraulic oil entering one pipeline is large and the flow of hydraulic oil entering the other pipeline is small, the pressure on the two pipelines will be inconsistent; at the same time, due to the inconsistent flow of hydraulic oil in the two pipelines, it will lead to The hydraulic oil flows of the first luffing balance valve and the second luffing balance valve are inconsistent; thus, the flow of hydraulic oil entering the first luffing hydraulic motor and the second luffing hydraulic motor cannot be kept consistent; so that the first luffing hydraulic motor It cannot rotate synchronously with the second luffing hydraulic motor; it is easy to cause pressure imbalance in the hydraulic system
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[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0023] Such as figure 1 Shown; a hydraulic system for boom luffing control; including a first luffing hydraulic motor 21, a second luffing hydraulic motor 22, a first luffing balance valve 23, a second luffing balance valve 24, and a luffing winch 25. The luffing brake mechanism, the first luffing reversing valve 26, the luffing shuttle valve 27, the luffing upper limit reversing valve 28 and the luffing lower limit reversing valve 29.
[0024] One end of the first luffing hydraulic motor 21 is connected with the first luffing rising oil passage 201; the first luffing rising oil passage 201 is connected with the control oil port BA1; the other end of the first luffing hydraulic motor 21 is connected with the first variable The amplitude descending oil circuit 202; the first amplitude descending oil circuit 202 is connected with the c...
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The invention provides a hydraulic system for variable amplitude control of a suspension arm and a control method. The hydraulic system comprises a first variable-amplitude ascending oil way, a first variable-amplitude descending oil way, a second variable-amplitude ascending oil way and a second variable-amplitude descending oil way; the first variable-amplitude communicating oil way is connected with the first variable-amplitude ascending oil way and the first variable-amplitude descending oil way; the second variable-amplitude communicating oil way is connected with the second variable-amplitude ascending oil way and the second variable-amplitude descending oil way; the flow of hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of hydraulic oil in the second variable-amplitude ascending oil way; the flow of hydraulic oil in the first variable-amplitude descending oil way is consistent with that of hydraulic oil in the second variable-amplitude descending oil way; the flow of hydraulic oil passing through the first variable-amplitude balance valve and the second variable-amplitude balance valve is consistent; the first variable-amplitude hydraulic motor and the second variable-amplitude hydraulic motor can rotate synchronously; the variable-amplitude winch can stably act; and meanwhile, the risk of pressure unbalance of the hydraulic system is reduced.
Description
technical field [0001] The invention relates to the field of cranes, in particular to a hydraulic system and a control method for boom amplitude control. Background technique [0002] Marine cranes are a special type of cranes that perform transportation operations in the offshore environment. They are mainly used for important tasks such as transportation and transfer of cargo between ships, replenishment at sea, and launching and recycling of underwater operating equipment. The luffing system provides power and brakes to the luffing winch. When the oil pressure suddenly increases, the pressure of the hydraulic system of the crane is unbalanced, which may cause the hydraulic components to fail or be damaged, resulting in oil leakage from the oil pipe, or even a burst of the oil pipe, which will seriously threaten the safety of the operation. [0003] In order to solve the above technical problems; the patent document in China with the application number 201811289896.4; the...
Claims
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IPC IPC(8): F15B11/22B66C23/82B66C13/20B66D1/08B66D5/08B66D5/26
CPCF15B11/22B66C23/82B66C13/20B66D1/08B66D5/08B66D5/26
Inventor 谷文平李新献郭安罗邹韬王海江陈世业吴天安韦淋睦
Owner SOUTH CHINA MARINE MACHINERY