CN102304931A - Hydraulic energy-saving control system and method for loader movable arm - Google Patents

Hydraulic energy-saving control system and method for loader movable arm Download PDF

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Publication number
CN102304931A
CN102304931A CN201110061341A CN201110061341A CN102304931A CN 102304931 A CN102304931 A CN 102304931A CN 201110061341 A CN201110061341 A CN 201110061341A CN 201110061341 A CN201110061341 A CN 201110061341A CN 102304931 A CN102304931 A CN 102304931A
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CN
China
Prior art keywords
control
swing arm
pressure
hydraulic
rod chamber
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CN201110061341A
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Chinese (zh)
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CN102304931B (en
Inventor
李安良
鲁纪鸣
李春来
张昌金
陈海波
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陈海波
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Priority to CN 201110061341 priority Critical patent/CN102304931B/en
Publication of CN102304931A publication Critical patent/CN102304931A/en
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Publication of CN102304931B publication Critical patent/CN102304931B/en

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Abstract

The invention discloses a double valve core hydraulic energy-saving control system and a double valve core hydraulic energy-saving control method for a loader movable arm. The double valve core hydraulic energy-saving control system for the loader movable arm comprises a movable arm hydraulic cylinder, a detection valve, a control valve, a pressure controller and a flow controller, wherein the pressure controller is connected with the rod-holding cavity of the movable arm hydraulic cylinder through the detection valve, and the flow controller is connected with the rod-free cavity of the movable arm hydraulic cylinder through the control valve. According to the double valve core hydraulic energy-saving control method for the loader movable arm, a rod-free cavity flow control strategy and a rod-holding cavity pressure control strategy of the movable arm hydraulic cylinder are adopted in the control of the loader movable arm lifting process. The double valve core hydraulic energy-saving control system for the loader movable arm has the advantages of simple structure, reliability in work, good universality and stability, low manufacturing cost and low energy loss in use.

Description

A kind of loading arm hydraulic energy-saving control system and method
Technical field
The present invention relates to a kind of hydraulic energy-saving control system and method, especially relate to a kind of loading arm double spool hydraulic energy-saving control system and method.
Background technology
The oil inlet and outlet control of tradition reversal valve is carried out through a spool; It is definite that the opening corresponding relation of two hydraulic fluid ports adds man-hour as far back as spool design; Can not revise in use, thus the feasible independent control that can not be independent of each other through the flow or the pressure of two hydraulic fluid ports, and energy consumption is high.
Summary of the invention
The objective of the invention is can not revise in order to solve in the existing reversal valve control procedure two hydraulic fluid port corresponding relations, the problem that energy consumption is high provides a kind of loading arm double spool hydraulic energy-saving control system and method.
The technical scheme of the present invention's loading arm double spool hydraulic energy-saving control system is: it comprises the swing arm hydraulic jack, detects valve, control valve, pressure controller, flow control valve; Pressure controller links to each other with the rod chamber of swing arm hydraulic jack through detecting valve, and flow control valve links to each other with the rodless cavity of swing arm hydraulic jack through control valve; Said control valve all has " double spool " structure with the detection valve.
The present invention's loading arm double spool hydraulic energy-saving control method is:
Loader boom lifting process control method is in the loader boom lifting process, the loader boom, bucket mounted under its own weight, boom hydraulic cylinder in compression, the piston movement direction is up, this time, by moving boom cylinder rod chamber to control the hydraulic oil flow control cylinder piston velocity, the hydraulic oil flow rate of the control, the control valve before the pressure difference signal is fed back to the flow controller, and then the control valve by the flow controller opening size adjusted to the proper position so that the control valve of the hydraulic oil flow to the required flow volume of traffic rod chamber, in order to achieve the hydraulic oil into the hydraulic boom cylinder rod chamber flow control; hydraulic cylinder for a boom rod chamber, first, the boom hydraulic cylinder rod chamber pressure signal is fed to the pressure controller, and then detected by a pressure controller to adjust the size of the valve opening, the boom hydraulic cylinder rod chamber hydraulic oil pressure reaches the desired target value;
Loading arm decline course control method for use is: in the swing arm decline process; When load direction is downward; Also be that the load direction of swing arm hydraulic jack is when consistent with the direction of motion; The concrete steps of control are; Automatically descended in downward deadweight component effect by swing arm and bunker; At this moment only need to the repairing of swing arm hydraulic jack rod chamber, to prevent cavitation erosion; To detect the piston pressure at both sides poor through detecting valve, and the pressure signal of rod chamber is fed back to pressure controller, then, detects the valve openings of sizes through the pressure controller adjustment, makes the size that flows into hydraulic fluid pressure in the rod chamber meet desired value; When load direction makes progress; Also be that the load direction of swing arm hydraulic jack is when opposite with the direction of motion; Thereby get into the movement velocity of the hydraulic fluid flow rate control swing arm hydraulic cylinder piston of swing arm hydraulic jack rod chamber through control; The rodless cavity pressurized is fuel-displaced, but guarantees that its pressure size meets desired value.
Loading arm double spool hydraulic energy-saving control system architecture of the present invention is simple, reliable operation.Loading arm double spool hydraulic energy-saving control method of the present invention; Through swing arm hydraulic jack oil inlet and outlet being carried out the control of pressure, flow or pressure and flow combination, can realize needing in traditional multichannel valve control system to increase the function that many extra control valves could be realized or be difficult to realize easily.Like this, can reduce on the one hand the kind of banked direction control valves, reduce cost and be beneficial to tissue, management; Can simplify design of Hydraulic System on the other hand, improve system's versatility, and improve the stability of a system.
Description of drawings
Fig. 1 is swing arm double spool hydraulic energy-saving control system architecture sketch map of the present invention
Fig. 2 is a swing arm double spool hydraulic energy-saving control method principle schematic of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing 1 accompanying drawing 2 and embodiment the present invention is described further.
With reference to Fig. 1; Present embodiment comprises swing arm hydraulic jack 1, control valve 4, detects valve 5, flow control valve 6, pressure controller 7; Pressure controller 7 links to each other with the rod chamber 2 of swing arm hydraulic jack 1 through detecting valve 5, and flow control valve 6 links to each other with the rodless cavity 3 of swing arm hydraulic jack 1 through control valve 4; Both all are " double spool " structures to said control valve 5 with detecting valve 4.Swing arm hydraulic jack 1 has rod chamber 2 and rodless cavity 3.
With reference to Fig. 1, Fig. 2, the present invention's loading arm double spool hydraulic energy-saving control method is:
Swing arm hydraulic jack lifting course control method for use:
In the process of boom lift loaders, loader boom, mounted bucket under its own weight, boom hydraulic cylinder a state of compression, the piston movement direction is up, this time through a boom hydraulic cylinder rod chamber 3 through input to control the flow of hydraulic oil boom hydraulic cylinder piston velocity, the hydraulic oil flow rate control valve 4 is to detect the pressure difference before and after the signal back to the flow controller 6, and then detected by the flow controller 6 valve 4 is adjusted to the proper size of the opening position of the valve 4 by detecting the flow rate of the hydraulic oil flow to the required size of the flow rod chamber, in order to achieve the boom of the hydraulic oil into the hydraulic cylinder 1 rodless control of the flow chamber (3); for a boom hydraulic cylinder rod chamber 2, the first boom hydraulic cylinder rod chamber 2 a pressure signal back to the pressure controller 7, and then, through the pressure control valve 5 controller 7 to adjust the size of the opening, the boom hydraulic cylinder 1 rod hydraulic oil in the pressure chamber 2 to achieve the desired target;
Swing arm decline course control method for use:
When load direction is downward; Also be the load direction of swing arm hydraulic jack 1 when consistent with the direction of motion, the concrete steps of control are descended automatically in downward deadweight component effect by swing arm and bunker; At this moment only need rod chamber 2 repairings, to prevent cavitation erosion to swing arm hydraulic jack 1; To detect the piston pressure at both sides poor through detecting valve 4, and the pressure signal of rod chamber 2 is fed back to pressure controller 7, then, through pressure controller 7 adjustment control valves 5 openings of sizes, makes the size that flows into hydraulic fluid pressures in the rod chamber 2 meet desired value;
When swing arm hydraulic jack 1 load direction makes progress, also be the load direction of swing arm hydraulic jack 1 when opposite with the direction of motion, rod chamber 2 is carried out flow-controls, thus the movement velocity of control oil cylinder piston; Rodless cavity 3 is carried out pressure control, the pressure control flow as stated, rodless cavity 3 pressurizeds are fuel-displaced, but guarantee that its pressure meets desired value.

Claims (2)

1. one kind of double spool loader boom hydraulic energy-saving control system, including the boom hydraulic cylinder, characterized in that a further check valve, control valve, pressure controller, flow controller, the pressure controller By detecting the valve and boom hydraulic cylinder rod chamber is connected through the control valve and flow controller boom hydraulic cylinder rod chamber is connected; said control valve and check valve both have a "double plug" structure.
2. loading arm double spool hydraulic energy-saving control method; It is characterized in that; In loading arm lifting process; Loading arm; Bunker is under the deadweight effect; The swing arm hydraulic jack is in pressured state; The piston motion direction is for making progress; At this moment; Control the movement velocity of oil cylinder piston through swing arm hydraulic jack rodless cavity hydraulic fluid flow rate; The control of hydraulic fluid flow rate size; Be that pressure at both sides difference signal before and after the control valve is fed back to flow control valve; Then; Through flow control valve the control valve openings of sizes is adjusted to the appropriate location, make through control valve hydraulic fluid flow rate by requirement flow into the flow size of rodless cavity, realize hydraulic oil is got into the control of swing arm hydraulic jack rodless cavity flow with this; For swing arm hydraulic jack rod chamber; At first the pressure signal with swing arm hydraulic jack rod chamber feeds back to pressure controller; Then, detect the valve openings of sizes, make the interior hydraulic fluid pressure of swing arm hydraulic jack rod chamber reach needed desired value through the pressure controller adjustment; In the swing arm decline process, when load direction is downward, also be the load direction of swing arm hydraulic jack when consistent, descended automatically by the downward deadweight component effect of swing arm and bunker, at this moment only need to the repairing of swing arm hydraulic jack rod chamber with the direction of motion; To detect the piston pressure at both sides poor through detecting valve, and the pressure signal of rod chamber is fed back to pressure controller, then, detects the valve openings of sizes through the pressure controller adjustment, makes the size that flows into hydraulic fluid pressure in the rod chamber meet desired value; When load direction makes progress; Also be that the load direction of swing arm hydraulic jack is when opposite with the direction of motion; Thereby get into the movement velocity of the hydraulic fluid flow rate control swing arm hydraulic cylinder piston of swing arm hydraulic jack rod chamber through control; The rodless cavity pressurized is fuel-displaced, but guarantees that its pressure size meets desired value.
CN 201110061341 2011-03-15 2011-03-15 Hydraulic energy-saving control system and method for loader movable arm CN102304931B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201110061341 CN102304931B (en) 2011-03-15 2011-03-15 Hydraulic energy-saving control system and method for loader movable arm

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Application Number Priority Date Filing Date Title
CN 201110061341 CN102304931B (en) 2011-03-15 2011-03-15 Hydraulic energy-saving control system and method for loader movable arm

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CN102304931A true CN102304931A (en) 2012-01-04
CN102304931B CN102304931B (en) 2013-09-04

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437389A (en) * 2013-09-12 2013-12-11 上海三一重机有限公司 Composite action energy regenerating structure, composite action energy regenerating method and excavator
CN103469847A (en) * 2013-09-26 2013-12-25 镇江金天辰新材料有限公司 Emergency falling system of movable arm of loader
CN103437389B (en) * 2013-09-12 2016-11-30 上海三一重机有限公司 A kind of composite move energy regeneration structure, method and excavator
CN106523480A (en) * 2016-11-23 2017-03-22 南京航空航天大学 Hydraulic servo drive system and control method
CN106763006A (en) * 2016-11-23 2017-05-31 南京航空航天大学 A kind of control method of hydraulic servo driving system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101148895A (en) * 2007-10-11 2008-03-26 天津工程机械研究院 Intelligent energy-saving loading machine
CN201679029U (en) * 2009-12-31 2010-12-22 福田雷沃国际重工股份有限公司 Hydraulically controlled loop on the boom descending of excavator
CN202012095U (en) * 2011-03-15 2011-10-19 陈海波 Movable arm hydraulic energy saving control device for loading machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101148895A (en) * 2007-10-11 2008-03-26 天津工程机械研究院 Intelligent energy-saving loading machine
CN201679029U (en) * 2009-12-31 2010-12-22 福田雷沃国际重工股份有限公司 Hydraulically controlled loop on the boom descending of excavator
CN202012095U (en) * 2011-03-15 2011-10-19 陈海波 Movable arm hydraulic energy saving control device for loading machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103437389A (en) * 2013-09-12 2013-12-11 上海三一重机有限公司 Composite action energy regenerating structure, composite action energy regenerating method and excavator
CN103437389B (en) * 2013-09-12 2016-11-30 上海三一重机有限公司 A kind of composite move energy regeneration structure, method and excavator
CN103469847A (en) * 2013-09-26 2013-12-25 镇江金天辰新材料有限公司 Emergency falling system of movable arm of loader
CN106523480A (en) * 2016-11-23 2017-03-22 南京航空航天大学 Hydraulic servo drive system and control method
CN106763006A (en) * 2016-11-23 2017-05-31 南京航空航天大学 A kind of control method of hydraulic servo driving system

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