CN114060336A - Hydraulic system for amplitude variation control of suspension arm and control method - Google Patents

Hydraulic system for amplitude variation control of suspension arm and control method Download PDF

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Publication number
CN114060336A
CN114060336A CN202111321343.4A CN202111321343A CN114060336A CN 114060336 A CN114060336 A CN 114060336A CN 202111321343 A CN202111321343 A CN 202111321343A CN 114060336 A CN114060336 A CN 114060336A
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China
Prior art keywords
amplitude
variable
oil
hydraulic
way
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CN202111321343.4A
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Chinese (zh)
Inventor
谷文平
李新献
郭安罗
邹韬
王海江
陈世业
吴天安
韦淋睦
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South China Marine Machinery Co Ltd
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South China Marine Machinery Co Ltd
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Priority to CN202111321343.4A priority Critical patent/CN114060336A/en
Publication of CN114060336A publication Critical patent/CN114060336A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/20—Control systems or devices for non-electric drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/08—Driving gear incorporating fluid motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/06—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect
    • B66D5/08—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes with radial effect embodying blocks or shoes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/26—Operating devices pneumatic or hydraulic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention provides a hydraulic system for amplitude variation control of a suspension arm and a control method; the hydraulic system comprises a first amplitude ascending oil way, a first amplitude descending oil way, a second amplitude ascending oil way and a second amplitude descending oil way; the first amplitude-variable communicating oil way is connected with the first amplitude-variable ascending oil way and the first amplitude-variable 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 the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way; the flow of hydraulic oil is consistent through the first variable amplitude balance valve and the second balance valve; so that the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor can synchronously rotate; so that the amplitude-variable winch can stably act; while reducing the risk of pressure imbalance in the hydraulic system.

Description

Hydraulic system for amplitude variation control of suspension arm and control method
Technical Field
The invention relates to the field of cranes, in particular to a hydraulic system for amplitude variation control of a suspension arm and a control method.
Background
The marine crane is a special crane for carrying out transportation operation in the marine environment, and is mainly used for important tasks of transportation and transfer of goods among ships, marine supply, throwing and recovering of underwater operation equipment and the like. The amplitude variation system provides power and brake for the amplitude variation winch platform. When the oil pressure is suddenly increased and the pressure of a hydraulic system of the crane is unbalanced, hydraulic elements can be out of work or damaged, oil leakage of an oil pipe can be caused, and even the oil pipe is cracked, so that the safety of operation can be seriously threatened.
To solve the above technical problems; in chinese application No. 201811289896.4; the patent document with publication number 2020.5.8 discloses a crane hydraulic system and a working method; it discloses a luffing system; the amplitude varying system is connected with one end of a first amplitude varying hydraulic motor through an amplitude varying ascending oil supply pipeline; the other variable-amplitude ascending oil supply pipeline is connected with one end of a second variable-amplitude hydraulic motor; is connected with the other end of the first variable-amplitude hydraulic motor through a variable-amplitude descending oil supply pipeline; the other amplitude-variable descending oil supply pipeline is connected with one end of a second amplitude-variable hydraulic motor; but the two amplitude-variable ascending oil supply pipelines and the two amplitude-variable descending oil supply pipelines are not communicated; when the flow of hydraulic oil entering a pipeline is large; when the flow of the hydraulic oil entering the other pipeline is small, the pressure born by the two pipelines is inconsistent; meanwhile, the two pipelines have the condition of inconsistent hydraulic oil flow; the flow of hydraulic oil passing through the first variable amplitude balance valve and the second variable amplitude balance valve respectively is inconsistent; the flow of hydraulic oil entering the first variable amplitude hydraulic motor and the flow of hydraulic oil entering the second variable amplitude hydraulic motor cannot be kept consistent; so that the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor can not synchronously rotate; hydraulic system pressure imbalance is easily created.
Disclosure of Invention
The invention provides a hydraulic system and a control method for amplitude variation control of a suspension arm, wherein the flow of hydraulic oil entering a first amplitude variation hydraulic motor and the flow of hydraulic oil entering a second amplitude variation hydraulic motor are kept consistent.
In order to achieve the purpose, the technical scheme of the invention is as follows: a hydraulic system for amplitude variation control of a suspension arm; the hydraulic control system comprises a first variable amplitude hydraulic motor, a second variable amplitude hydraulic motor, a first variable amplitude balance valve, a second variable amplitude balance valve, a variable amplitude winch, a variable amplitude brake mechanism, a first variable amplitude reversing valve and a variable amplitude shuttle valve; one end of the first variable amplitude hydraulic motor is connected with a first variable amplitude ascending oil way; the first variable-amplitude ascending oil way is connected with a control oil port BA 1; the other end of the first variable amplitude hydraulic motor is connected with a first variable amplitude descending oil way; the first amplitude-variable descending oil way is connected with a control oil port BB 1; the first amplitude-variable ascending oil way is connected with a first amplitude-variable balance valve; one end of the second variable-amplitude hydraulic motor is connected with a second variable-amplitude ascending oil way; the second variable-amplitude ascending oil way is connected with a control oil port BA 2; the other end of the second variable-amplitude hydraulic motor is connected with a second variable-amplitude descending oil way; the second amplitude-variable descending oil way is connected with a control oil port BB 2; a second variable-amplitude ascending oil path is connected with a second variable-amplitude balance valve; a first variable-amplitude oil-communicating passage is connected between the first variable-amplitude oil-rising passage and the second variable-amplitude oil-rising passage; the flow of the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; a second variable-amplitude descending oil way is connected between the first variable-amplitude descending oil way and the second variable-amplitude descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way.
The power output end of the first variable-amplitude hydraulic motor and the power output end of the second variable-amplitude hydraulic motor are respectively connected with a variable-amplitude winch, and the variable-amplitude brake mechanism comprises a first variable-amplitude hydraulic brake and a second variable-amplitude hydraulic brake; the first amplitude-variable hydraulic brake clamps the power output end of the first amplitude-variable hydraulic motor; the second variable amplitude hydraulic brake clamps the power output end of the second variable amplitude hydraulic motor; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake are both connected with one end of the first amplitude-variable reversing valve; the other end of the first variable amplitude reversing valve is connected with an emergency oil way; the emergency oil way is connected with a control oil port BR; the signal end of the first amplitude-changing reversing valve is connected with the output end of the amplitude-changing shuttle valve; one input end of the amplitude-variable shuttle valve is connected with the first amplitude-variable ascending oil way; the other input end of the amplitude-variable shuttle valve is connected with the first amplitude-variable descending oil way.
The first variable amplitude communicating oil way is arranged; hydraulic oil in the first amplitude-variable ascending oil way flows into the second amplitude-variable ascending oil way; hydraulic oil in the second amplitude-variable ascending oil way flows into the first amplitude-variable ascending oil way; the flow of the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; a second amplitude-variable communicating oil way is arranged; hydraulic oil in the first amplitude-variable descending oil way flows into the second amplitude-variable descending oil way; hydraulic oil in the second amplitude-variable descending oil way flows into the first amplitude-variable descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way; thus, the pressure born by the first amplitude ascending oil circuit and the second amplitude ascending oil circuit is consistent; the pressure born by the first amplitude-variable descending oil circuit and the second amplitude-variable descending oil circuit is consistent; meanwhile, the flow rates of hydraulic oil between the two amplitude ascending oil ways and between the two amplitude ascending oil ways are consistent; the flow of hydraulic oil is consistent through the first variable amplitude balance valve and the second balance valve; the flow rates of the hydraulic oil respectively entering the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor are the same; so that the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor can synchronously rotate; so that the amplitude-variable winch can stably act; while reducing the risk of pressure imbalance in the hydraulic system.
Furthermore, the device also comprises an amplitude-variable upper limiting reversing valve and an amplitude-variable lower limiting reversing valve; the amplitude variation upper limiting reversing valve is connected between the amplitude variation shuttle valve and the first amplitude variation ascending oil way; the amplitude-variable lower limiting reversing valve is connected between the amplitude-variable shuttle valve and the first amplitude-variable descending oil way. Therefore, the lifting and the descending of the amplitude-variable winch can be respectively limited.
Furthermore, an oil drain port of the first variable amplitude hydraulic motor, an oil drain port of the second variable amplitude hydraulic motor, one end of the first variable amplitude reversing valve, one end of the variable amplitude upper limiting reversing valve and one end of the variable amplitude lower limiting reversing valve are connected with an oil return line; the oil return oil way is connected with a control oil port BL.
Further, the first amplitude-variable balance valve comprises a first amplitude-variable one-way valve and a first amplitude-variable overflow valve; an oil inlet of the first variable amplitude overflow valve is connected with one end of the first variable amplitude hydraulic motor; an oil outlet of the first variable amplitude overflow valve is connected with a control oil port BA 1; a control oil port of the first variable-amplitude overflow valve is connected with the second variable-amplitude descending oil way; an oil inlet of the first variable amplitude one-way valve is connected with an oil outlet of the first variable amplitude overflow valve; an oil outlet of the first variable amplitude one-way valve is connected with an oil inlet of the first variable amplitude overflow valve.
Further, the second amplitude-variable balance valve comprises a second amplitude-variable one-way valve and a second amplitude-variable overflow valve; an oil inlet of the second variable amplitude overflow valve is connected with one end of the second variable amplitude hydraulic motor; an oil outlet of the second variable-amplitude overflow valve is connected with a control oil port BA 2; a control oil port of the second variable-amplitude overflow valve is connected with the second variable-amplitude descending oil way; an oil inlet of the second variable amplitude one-way valve is connected with an oil outlet of the second variable amplitude overflow valve; an oil outlet of the second variable amplitude one-way valve is connected with an oil inlet of the second variable amplitude overflow valve.
The invention also provides a control method for amplitude variation control of the suspension arm; the method comprises the following steps:
(1) carrying out the step (2) when the amplitude-changing winch carries out lifting action; and (3) descending the amplitude-variable winch, and then performing the step (3).
(2) Hydraulic oil inflow control port BA1 and control port BA 2; part of hydraulic oil flows from the first amplitude ascending oil way to the second amplitude ascending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable ascending oil way and then flows to the control oil port BB 1; part of the hydraulic oil flows from the second amplitude-variable ascending oil path to the second amplitude-variable hydraulic motor and then flows to the control oil port BB 2; part of the hydraulic oil flows to the first amplitude-variable ascending oil way through the second amplitude-variable ascending oil way; the flow of the hydraulic oil in the first amplitude-variable ascending oil path is consistent with that of the hydraulic oil in the second amplitude-variable ascending oil path.
Part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation upper limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor drive the amplitude-variable winch to lift.
(3) Hydraulic oil inflow control port BB1 and control port BB 2; part of hydraulic oil flows from the first amplitude descending oil way to the second amplitude descending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable descending oil way and then flows to the control oil port BA 1; part of the hydraulic oil flows from the second amplitude-variable descending oil way to the second amplitude-variable hydraulic motor and then flows to the control oil port BA 2; part of hydraulic oil flows to the first amplitude-variable descending oil way through the second amplitude-variable descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way.
Part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation lower limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor rotate towards the other direction.
In the method, when the amplitude-variable winch carries out lifting action; hydraulic oil input from the first amplitude-variable ascending oil way is input into a signal end of the first amplitude-variable reversing valve; reversing the first variable amplitude reversing valve; hydraulic oil is input from the emergency oil way and flows into a variable amplitude hydraulic brake and a second variable amplitude hydraulic brake to open the brake; meanwhile, hydraulic oil flows from the first amplitude ascending oil way to the first amplitude descending oil way and from the second amplitude ascending oil way to the second amplitude descending oil way; hydraulic oil in the first amplitude-variable ascending oil way flows into the second amplitude-variable ascending oil way; hydraulic oil in the second amplitude-variable ascending oil way flows into the first amplitude-variable ascending oil way; the flow of the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; driving the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor to synchronously rotate; when the amplitude-variable winch descends; hydraulic oil input from the first amplitude-variable descending oil way is input into a signal end of the first amplitude-variable reversing valve; reversing the first variable amplitude reversing valve; hydraulic oil input from the emergency oil way flows into a variable amplitude hydraulic brake and a second variable amplitude hydraulic brake to open the brake; meanwhile, hydraulic oil flows from the first amplitude descending oil way to the first amplitude ascending oil way and from the second amplitude descending oil way to the second amplitude ascending oil way; hydraulic oil in the first amplitude-variable descending oil way flows into the second amplitude-variable descending oil way; hydraulic oil in the second amplitude-variable descending oil way flows into the first amplitude-variable descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor are driven to synchronously rotate.
Further, the step (2) further comprises: after the amplitude variation upper limiting reversing valve reverses; the oil circuit between the control oil port BA1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; and stopping the amplitude-changing winch from lifting.
The step (3) further comprises the following steps: after the amplitude-variable lower limiting reversing valve is reversed; the oil circuit between the control oil port BB1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; and the amplitude-changing winch stops descending.
Drawings
FIG. 1 is a hydraulic schematic of the hydraulic system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1; a hydraulic system for amplitude variation control of a suspension arm; the hydraulic control system comprises a first amplitude-variable hydraulic motor 21, a second amplitude-variable hydraulic motor 22, a first amplitude-variable balance valve 23, a second amplitude-variable balance valve 24, an amplitude-variable winch 25, an amplitude-variable brake mechanism, a first amplitude-variable reversing valve 26, an amplitude-variable shuttle valve 27, an amplitude-variable upper limiting reversing valve 28 and an amplitude-variable lower limiting reversing valve 29.
One end of the first variable amplitude hydraulic motor 21 is connected with a first variable amplitude ascending oil path 201; the first variable-amplitude ascending oil path 201 is connected with a control oil port BA 1; the other end of the first luffing hydraulic motor 21 is connected with a first luffing descent oil path 202; the first luffing descent oil passage 202 is connected with a control oil port BB 1. The oil drain port of the first variable amplitude hydraulic motor 21 and the oil drain port of the second variable amplitude hydraulic motor 22 are connected with an oil return path 207; the oil return passage 207 is connected to a control port BL.
The first variable-amplitude ascending oil path 201 is connected with a first variable-amplitude balance valve 23; one end of the second luffing hydraulic motor 22 is connected with a second luffing oil lifting oil path 203; the second variable-amplitude ascending oil way 203 is connected with a control oil port BA 2; the other end of the second variable-amplitude hydraulic motor 22 is connected with a second variable-amplitude descending oil path 204; the second amplitude-variable descending oil way 204 is connected with a control oil port BB 2; the second variable-amplitude ascending oil way 203 is connected with a second variable-amplitude balance valve 24; a first amplitude-variable communication oil way 205 is connected between the first amplitude-variable ascending oil way 201 and the second amplitude-variable ascending oil way 203; the flow rate of the hydraulic oil in the first variable-amplitude ascending oil path 201 is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil path 203; a second amplitude-variable descending oil passage 206 is connected between the first amplitude-variable descending oil passage 202 and the second amplitude-variable descending oil passage 204; the flow rate of the hydraulic oil in the first amplitude-varying descending oil passage 202 is the same as that of the hydraulic oil in the second amplitude-varying descending oil passage 204.
The power output end of the first amplitude-variable hydraulic motor 21 and the power output end of the second amplitude-variable hydraulic motor 22 are respectively connected with an amplitude-variable winch 25, and the amplitude-variable brake mechanism comprises a first amplitude-variable hydraulic brake 31 and a second amplitude-variable hydraulic brake 32; the first luffing hydraulic brake 31 clamps the power output end of the first luffing hydraulic motor 21; the second luffing hydraulic brake 32 clamps the power output of the second luffing hydraulic motor 22; the first luffing hydraulic brake 31 and the second luffing hydraulic brake 32 are both connected to the B5 end of the first luffing reversing valve 26; the A5 end of the first variable amplitude reversing valve 26 is connected with the emergency oil way 208; the P5 end of the first variable amplitude reversing valve 26 is connected with the oil return path 207; the emergency oil way 208 is connected with a control oil port BR; the signal end of the first luffing shuttle valve 26 is connected to the output end of the luffing shuttle valve 27.
One input end of the luffing shuttle valve 27 is connected with the B3 end of the luffing upper limiting reversing valve 28; the P3 end of the luffing upper limiting directional valve 28 is connected to the first luffing oil rising passage 201. The other input end of the luffing shuttle valve 27 is connected with the end B4 of the luffing lower limiting reversing valve 29; the P4 end of the amplitude lower limiting directional control valve 29 is connected to the first amplitude lowering oil passage 202. Thus, the lifting and the descending of the amplitude-variable winch 25 can be respectively limited. The end T3 of the amplitude upper limit reversing valve 28 and the end T4 of the amplitude lower limit reversing valve 29 are connected with the oil return passage 207. The end A3 of the upper amplitude limiting directional valve 28 and the end a4 of the lower amplitude limiting directional valve 29 are stopped. In the present embodiment, the amplitude upper limit reversing valve 28 and the amplitude lower limit reversing valve 29 are both two-position four-way mechanical reversing valves.
The first amplitude balance valve 23 comprises a first amplitude one-way valve 231 and a first amplitude overflow valve 232; an oil inlet of the first variable amplitude overflow valve 232 is connected with one end of the first variable amplitude hydraulic motor 21; an oil outlet of the first variable amplitude overflow valve 232 is connected with a control oil port BA 1; a control oil port of the first amplitude-variable overflow valve 232 is connected with the second amplitude-variable descending oil way 204; an oil inlet of the first variable amplitude one-way valve 231 is connected with an oil outlet of the first variable amplitude overflow valve 232; an oil outlet of the first variable amplitude one-way valve 231 is connected with an oil inlet of the first variable amplitude overflow valve 232.
The second amplitude balance valve 24 comprises a second amplitude one-way valve 241 and a second amplitude overflow valve 242; an oil inlet of the second variable amplitude overflow valve 242 is connected with one end of the second variable amplitude hydraulic motor 22; an oil outlet of the second variable amplitude overflow valve 242 is connected with a control oil port BA 2; a control oil port of the second amplitude-variable overflow valve 242 is connected with the second amplitude-variable descending oil path 204; an oil inlet of the second variable amplitude one-way valve 241 is connected with an oil outlet of the second variable amplitude overflow valve 242; the oil outlet of the second variable amplitude one-way valve 241 is connected with the oil inlet of the second variable amplitude overflow valve 242.
A first variable amplitude communicating oil way 205 is arranged; the hydraulic oil in the first amplitude ascending oil path 201 flows into the second amplitude ascending oil path 203; the hydraulic oil in the second amplitude ascending oil path 203 flows into the first amplitude ascending oil path 201; the flow rate of the hydraulic oil in the first variable-amplitude ascending oil path 201 is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil path 203; a second variable amplitude communication oil way 206 is arranged; the hydraulic oil in the first amplitude descending oil path 202 flows into the second amplitude descending oil path 204; the hydraulic oil in the second amplitude descending oil path 204 flows into the first amplitude descending oil path 202; the flow rate of the hydraulic oil in the first amplitude-varying descending oil path 202 is consistent with that of the hydraulic oil in the second amplitude-varying descending oil path 204; thus, the pressure born by the first amplitude ascending oil path 201 and the pressure born by the second amplitude ascending oil path 203 are consistent; the pressure born by the first amplitude-varying descending oil path 202 and the second amplitude-varying descending oil path 204 is consistent; meanwhile, the flow rates of hydraulic oil between the two amplitude ascending oil ways and between the two amplitude ascending oil ways are consistent; the flow rate of hydraulic oil is consistent through the first luffing balance valve 23 and the second balance valve; so that the flow rates of the hydraulic oil respectively entering the first luffing hydraulic motor 21 and the second luffing hydraulic motor 22 are the same; so that the first variable amplitude hydraulic motor 21 and the second variable amplitude hydraulic motor 22 can synchronously rotate; so that the amplitude-variable winch 25 can stably act; while reducing the risk of pressure imbalance in the hydraulic system.
The invention also provides a control method for amplitude variation control of the suspension arm; the method comprises the following steps:
(1) carrying out the step (2) when the amplitude-changing winch carries out lifting action; and (3) descending the amplitude-variable winch, and then performing the step (3).
(2) Hydraulic oil inflow control port BA1 and control port BA 2; part of hydraulic oil flows from the first amplitude ascending oil way to the second amplitude ascending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable ascending oil way and then flows to the control oil port BB 1; part of the hydraulic oil flows from the second amplitude-variable ascending oil path to the second amplitude-variable hydraulic motor and then flows to the control oil port BB 2; part of the hydraulic oil flows to the first amplitude-variable ascending oil way through the second amplitude-variable ascending oil way; the flow of the hydraulic oil in the first amplitude-variable ascending oil path is consistent with that of the hydraulic oil in the second amplitude-variable ascending oil path.
Part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation upper limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor drive the amplitude-variable winch to lift.
(3) Hydraulic oil inflow control port BB1 and control port BB 2; part of hydraulic oil flows from the first amplitude descending oil way to the second amplitude descending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable descending oil way and then flows to the control oil port BA 1; part of the hydraulic oil flows from the second amplitude-variable descending oil way to the second amplitude-variable hydraulic motor and then flows to the control oil port BA 2; part of hydraulic oil flows to the first amplitude-variable descending oil way through the second amplitude-variable descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way.
Part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation lower limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor rotate towards the other direction.
In the method, when the amplitude-variable winch carries out lifting action; hydraulic oil input from the first amplitude-variable ascending oil way is input into a signal end of the first amplitude-variable reversing valve; reversing the first variable amplitude reversing valve; hydraulic oil is input from the emergency oil way and flows into a variable amplitude hydraulic brake and a second variable amplitude hydraulic brake to open the brake; meanwhile, hydraulic oil flows from the first amplitude ascending oil way to the first amplitude descending oil way and from the second amplitude ascending oil way to the second amplitude descending oil way; hydraulic oil in the first amplitude-variable ascending oil way flows into the second amplitude-variable ascending oil way; hydraulic oil in the second amplitude-variable ascending oil way flows into the first amplitude-variable ascending oil way; the flow of the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; driving the first variable amplitude hydraulic motor and the second variable amplitude hydraulic motor to synchronously rotate; when the amplitude-variable winch descends; hydraulic oil input from the first amplitude-variable descending oil way is input into a signal end of the first amplitude-variable reversing valve; reversing the first variable amplitude reversing valve; hydraulic oil input from the emergency oil way flows into a variable amplitude hydraulic brake and a second variable amplitude hydraulic brake to open the brake; meanwhile, hydraulic oil flows from the first amplitude descending oil way to the first amplitude ascending oil way and from the second amplitude descending oil way to the second amplitude ascending oil way; hydraulic oil in the first amplitude-variable descending oil way flows into the second amplitude-variable descending oil way; hydraulic oil in the second amplitude-variable descending oil way flows into the first amplitude-variable descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor are driven to synchronously rotate.
The method comprises the following steps:
the step (2) further comprises the following steps: after the amplitude variation upper limiting reversing valve reverses; the oil circuit between the control oil port BA1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; and stopping the amplitude-changing winch from lifting.
The step (3) further comprises the following steps: after the amplitude-variable lower limiting reversing valve is reversed; the oil circuit between the control oil port BB1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; and the amplitude-changing winch stops descending.

Claims (7)

1. A hydraulic system for amplitude variation control of a suspension arm; the hydraulic control system comprises a first variable amplitude hydraulic motor, a second variable amplitude hydraulic motor, a first variable amplitude balance valve, a second variable amplitude balance valve, a variable amplitude winch, a variable amplitude brake mechanism, a first variable amplitude reversing valve and a variable amplitude shuttle valve; the method is characterized in that: one end of the first variable amplitude hydraulic motor is connected with a first variable amplitude ascending oil way; the first variable-amplitude ascending oil way is connected with a control oil port BA 1; the other end of the first variable amplitude hydraulic motor is connected with a first variable amplitude descending oil way; the first amplitude-variable descending oil way is connected with a control oil port BB 1; the first amplitude-variable ascending oil way is connected with a first amplitude-variable balance valve; one end of the second variable-amplitude hydraulic motor is connected with a second variable-amplitude ascending oil way; the second variable-amplitude ascending oil way is connected with a control oil port BA 2; the other end of the second variable-amplitude hydraulic motor is connected with a second variable-amplitude descending oil way; the second amplitude-variable descending oil way is connected with a control oil port BB 2; a second variable-amplitude ascending oil path is connected with a second variable-amplitude balance valve; a first variable-amplitude oil-communicating passage is connected between the first variable-amplitude oil-rising passage and the second variable-amplitude oil-rising passage; the flow of the hydraulic oil in the first variable-amplitude ascending oil way is consistent with that of the hydraulic oil in the second variable-amplitude ascending oil way; a second variable-amplitude descending oil way is connected between the first variable-amplitude descending oil way and the second variable-amplitude descending oil way; the flow of the hydraulic oil in the first amplitude-variable descending oil way is consistent with that of the hydraulic oil in the second amplitude-variable descending oil way;
the power output end of the first variable-amplitude hydraulic motor and the power output end of the second variable-amplitude hydraulic motor are respectively connected with a variable-amplitude winch, and the variable-amplitude brake mechanism comprises a first variable-amplitude hydraulic brake and a second variable-amplitude hydraulic brake; the first amplitude-variable hydraulic brake clamps the power output end of the first amplitude-variable hydraulic motor; the second variable amplitude hydraulic brake clamps the power output end of the second variable amplitude hydraulic motor; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake are both connected with one end of the first amplitude-variable reversing valve; the other end of the first variable amplitude reversing valve is connected with an emergency oil way; the emergency oil way is connected with a control oil port BR; the signal end of the first amplitude-changing reversing valve is connected with the output end of the amplitude-changing shuttle valve; one input end of the amplitude-variable shuttle valve is connected with the first amplitude-variable ascending oil way; the other input end of the amplitude-variable shuttle valve is connected with the first amplitude-variable descending oil way.
2. The hydraulic system for amplitude variation control of the boom according to claim 1; the method is characterized in that: the device also comprises an amplitude-variable upper limiting reversing valve and an amplitude-variable lower limiting reversing valve; the amplitude variation upper limiting reversing valve is connected between the amplitude variation shuttle valve and the first amplitude variation ascending oil way; the amplitude-variable lower limiting reversing valve is connected between the amplitude-variable shuttle valve and the first amplitude-variable descending oil way.
3. The hydraulic system for amplitude variation control of the boom according to claim 2; the method is characterized in that: an oil drain port of the first variable-amplitude hydraulic motor, an oil drain port of the second variable-amplitude hydraulic motor, one end of the first variable-amplitude reversing valve, one end of the variable-amplitude upper limiting reversing valve and one end of the variable-amplitude lower limiting reversing valve are connected with an oil return way; the oil return oil way is connected with a control oil port BL.
4. A hydraulic system for amplitude control of a boom according to claim 3; the method is characterized in that: the first amplitude-variable balance valve comprises a first amplitude-variable one-way valve and a first amplitude-variable overflow valve; an oil inlet of the first variable amplitude overflow valve is connected with one end of the first variable amplitude hydraulic motor; an oil outlet of the first variable amplitude overflow valve is connected with a control oil port BA 1; a control oil port of the first variable-amplitude overflow valve is connected with the second variable-amplitude descending oil way; an oil inlet of the first variable amplitude one-way valve is connected with an oil outlet of the first variable amplitude overflow valve; an oil outlet of the first variable amplitude one-way valve is connected with an oil inlet of the first variable amplitude overflow valve.
5. The hydraulic system for amplitude variation control of the boom according to claim 4; the method is characterized in that: the second amplitude-variable balance valve comprises a second amplitude-variable one-way valve and a second amplitude-variable overflow valve; an oil inlet of the second variable amplitude overflow valve is connected with one end of the second variable amplitude hydraulic motor; an oil outlet of the second variable-amplitude overflow valve is connected with a control oil port BA 2; a control oil port of the second variable-amplitude overflow valve is connected with the second variable-amplitude descending oil way; an oil inlet of the second variable amplitude one-way valve is connected with an oil outlet of the second variable amplitude overflow valve; an oil outlet of the second variable amplitude one-way valve is connected with an oil inlet of the second variable amplitude overflow valve.
6. The control method of the hydraulic system for controlling the amplitude of the suspension arm according to any one of claims 1 to 5; the method is characterized in that: the method comprises the following steps:
(1) carrying out the step (2) when the amplitude-changing winch carries out lifting action; the step (3) is carried out when the amplitude-variable winch descends;
(2) hydraulic oil inflow control port BA1 and control port BA 2; part of hydraulic oil flows from the first amplitude ascending oil way to the second amplitude ascending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable ascending oil way and then flows to the control oil port BB 1; part of the hydraulic oil flows from the second amplitude-variable ascending oil path to the second amplitude-variable hydraulic motor and then flows to the control oil port BB 2; part of the hydraulic oil flows to the first amplitude-variable ascending oil way through the second amplitude-variable ascending oil way; the flow of hydraulic oil in the first amplitude-variable ascending oil way is consistent with that of hydraulic oil in the second amplitude-variable ascending oil way;
part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation upper limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor drive the amplitude-variable winch to lift;
(3) hydraulic oil inflow control port BB1 and control port BB 2; part of hydraulic oil flows from the first amplitude descending oil way to the second amplitude descending oil way; part of the hydraulic oil flows to the first amplitude-variable hydraulic motor through the first amplitude-variable descending oil way and then flows to the control oil port BA 1; part of the hydraulic oil flows from the second amplitude-variable descending oil way to the second amplitude-variable hydraulic motor and then flows to the control oil port BA 2; part of hydraulic oil flows to the first amplitude-variable descending oil way through the second amplitude-variable descending oil way; the flow of hydraulic oil in the first amplitude-variable descending oil way is consistent with that of hydraulic oil in the second amplitude-variable descending oil way;
part of hydraulic oil flows to the amplitude variation shuttle valve through the amplitude variation lower limiting reversing valve, the first amplitude variation reversing valve reverses, and then the hydraulic oil flows into the first amplitude variation hydraulic brake and the second amplitude variation hydraulic brake to open the brakes; the first amplitude-variable hydraulic motor and the second amplitude-variable hydraulic motor rotate towards the other direction.
7. The control method of the hydraulic system for the amplitude control of the suspension arm according to claim 6; the method is characterized in that: further comprising the steps of:
the step (2) further comprises the following steps: after the amplitude variation upper limiting reversing valve reverses; the oil circuit between the control oil port BA1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; stopping lifting the amplitude-variable winch;
the step (3) further comprises the following steps: after the amplitude-variable lower limiting reversing valve is reversed; the oil circuit between the control oil port BB1 and the luffing shuttle valve is disconnected; the first amplitude-variable hydraulic brake and the second amplitude-variable hydraulic brake close the brakes; and the amplitude-changing winch stops descending.
CN202111321343.4A 2021-11-09 2021-11-09 Hydraulic system for amplitude variation control of suspension arm and control method Pending CN114060336A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111321343.4A CN114060336A (en) 2021-11-09 2021-11-09 Hydraulic system for amplitude variation control of suspension arm and control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111321343.4A CN114060336A (en) 2021-11-09 2021-11-09 Hydraulic system for amplitude variation control of suspension arm and control method

Publications (1)

Publication Number Publication Date
CN114060336A true CN114060336A (en) 2022-02-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111321343.4A Pending CN114060336A (en) 2021-11-09 2021-11-09 Hydraulic system for amplitude variation control of suspension arm and control method

Country Status (1)

Country Link
CN (1) CN114060336A (en)

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