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Drive and brake system for large belt conveyor

Classification: Industry News
Author:
Source:
Release time: 2018-05-17
Views:61

【概要描述】Forthefailureofthehydraulicsystemoftheconstructionmachineryonsite,accordingtotheworkingprincipleofthehydraulicsystem,thecauseofthefailurecanbereasonedonthesystemdiagramaccordingtothesequenceofthepowerelement-controlelementexecutionelement.Accordingtotheanalysis,itisgenerallycausedbythedecreaseinoilpressureorthedecreaseinflow.Fromthesystemdiagram,thepossiblefactorsthatcausethepressuredropare:①fueltank,suchaslackofoil,blockedsuctionfilter,andventholesarenotsmooth;②hydraulicpumpleakForexample,thefittingclearanceoftheplungerpairofthehydraulicpumpisincreased;③Thepressureofthemainsafetyvalveonthecontrolvalveistoolow,theconfigurationof30isanalyzed,andrelatedproblemsareexplained. Forbeltconveyorsthataremainlyusedforleveltransportationanduppertransportation,themainproblemistosolvethedrivingproblem,whileforbeltconveyorsthataremainlyusedforthefollowingtransportation,theproblemismainlytosolvethebrakingproblem.Becausetheloadisdraggingthemotorwhenitisrunningunderload,themotorisinthestateofgeneratingandbraking.Oncethemotorlosespowerandisnotequippedwithasuitablebrakingsystem,thespeedofthelowerbeltwillbefasterandfaster,whichwillcauseflying.accident.Thedrivesystemandbrakesystemofthelargebeltconveyorarediscussedbelow. 1DrivesystemforlargebeltconveyorsForflatorupperbeltconveyors,thedrivesystemisgenerallycomposedofmotor,hydrauliccouplingandreducer.Duetoseveremoment-limitingfluidorinternalleakage;④Thesettingpressureoftheboomhydrauliccylinderoverloadvalveistoolowortheinternalleakageisserious,and⑤theoilreturnpathisnotsmoothandsoon.Consideringthesereasons,somefactorsareeliminatedaccordingtotheexistinginspectionresults,andthescopeofthefaultisnarroweduntilthefaultpointisfoundandeliminated. Inthefaultdiagnosisofthehydraulicsystemofconstructionmachineryduringfieldconstruction,accordingtotheworkingprincipleofthehydraulicsystem,itisnecessarytomastersomelawsandcommonsense,andtoanalyzewhetherthefailureisearlyorgradual.Ifitisearly-onset,itismostlyduetoimproperadjustment.Ifitisprogressive,itisoftencausedbycomponentwear,corrosion,fatigue,andaging.Second,itisnecessarytoanalyzewhetheritisawearingpartoranon-wearingpart.IfitisunderhighfrequencyandheavyloadThemovingpartsarehydrauliccomponentsthatarepronetofailure,suchastheplungerpair,oildistributionplatepair,variableservo,andhydrauliccylinderofthehydraulicpump,whilethecomponentsatlowfrequency,lightload,orrelativelystationaryarelesspronetofailure.Suchasdirectionalvalve,sequencevalve,slidevalve,etc.Aftermasteringtheserules,itcanplayapositiveroleinquicklydeterminingthefaultlocation.

Drive and brake system for large belt conveyor

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Drive and brake system for large belt conveyor

(Summary description)Forthefailureofthehydraulicsystemoftheconstructionmachineryonsite,accordingtotheworkingprincipleofthehydraulicsystem,thecauseofthefailurecanbereasonedonthesystemdiagramaccordingtothesequenceofthepowerelement-controlelementexecutionelement.Accordingtotheanalysis,itisgenerallycausedbythedecreaseinoilpressureorthedecreaseinflow.Fromthesystemdiagram,thepossiblefactorsthatcausethepressuredropare:①fueltank,suchaslackofoil,blockedsuctionfilter,andventholesarenotsmooth;②hydraulicpumpleakForexample,thefittingclearanceoftheplungerpairofthehydraulicpumpisincreased;③Thepressureofthemainsafetyvalveonthecontrolvalveistoolow,theconfigurationof30isanalyzed,andrelatedproblemsareexplained. Forbeltconveyorsthataremainlyusedforleveltransportationanduppertransportation,themainproblemistosolvethedrivingproblem,whileforbeltconveyorsthataremainlyusedforthefollowingtransportation,theproblemismainlytosolvethebrakingproblem.Becausetheloadisdraggingthemotorwhenitisrunningunderload,themotorisinthestateofgeneratingandbraking.Oncethemotorlosespowerandisnotequippedwithasuitablebrakingsystem,thespeedofthelowerbeltwillbefasterandfaster,whichwillcauseflying.accident.Thedrivesystemandbrakesystemofthelargebeltconveyorarediscussedbelow. 1DrivesystemforlargebeltconveyorsForflatorupperbeltconveyors,thedrivesystemisgenerallycomposedofmotor,hydrauliccouplingandreducer.Duetoseveremoment-limitingfluidorinternalleakage;④Thesettingpressureoftheboomhydrauliccylinderoverloadvalveistoolowortheinternalleakageisserious,and⑤theoilreturnpathisnotsmoothandsoon.Consideringthesereasons,somefactorsareeliminatedaccordingtotheexistinginspectionresults,andthescopeofthefaultisnarroweduntilthefaultpointisfoundandeliminated. Inthefaultdiagnosisofthehydraulicsystemofconstructionmachineryduringfieldconstruction,accordingtotheworkingprincipleofthehydraulicsystem,itisnecessarytomastersomelawsandcommonsense,andtoanalyzewhetherthefailureisearlyorgradual.Ifitisearly-onset,itismostlyduetoimproperadjustment.Ifitisprogressive,itisoftencausedbycomponentwear,corrosion,fatigue,andaging.Second,itisnecessarytoanalyzewhetheritisawearingpartoranon-wearingpart.IfitisunderhighfrequencyandheavyloadThemovingpartsarehydrauliccomponentsthatarepronetofailure,suchastheplungerpair,oildistributionplatepair,variableservo,andhydrauliccylinderofthehydraulicpump,whilethecomponentsatlowfrequency,lightload,orrelativelystationaryarelesspronetofailure.Suchasdirectionalvalve,sequencevalve,slidevalve,etc.Aftermasteringtheserules,itcanplayapositiveroleinquicklydeterminingthefaultlocation.

Categories:Industry News
Author:
Origin:
Time of issue:2018-05-17
Views:61

Information

For the failure of the hydraulic system of the construction machinery on site, according to the working principle of the hydraulic system, the cause of the failure can be reasoned on the system diagram according to the sequence of the power element-control element execution element. According to the analysis, it is generally caused by the decrease in oil pressure or the decrease in flow. From the system diagram, the possible factors that cause the pressure drop are: ① fuel tank, such as lack of oil, blocked suction filter, and vent holes are not smooth; ② hydraulic pump leak For example, the fitting clearance of the plunger pair of the hydraulic pump is increased; ③ The pressure of the main safety valve on the control valve is too low, the configuration of 30 is analyzed, and related problems are explained.

For belt conveyors that are mainly used for level transportation and upper transportation, the main problem is to solve the driving problem, while for belt conveyors that are mainly used for the following transportation, the problem is mainly to solve the braking problem. Because the load is dragging the motor when it is running under load, the motor is in the state of generating and braking. Once the motor loses power and is not equipped with a suitable braking system, the speed of the lower belt will be faster and faster, which will cause flying. accident. The drive system and brake system of the large belt conveyor are discussed below.

1 Drive system for large belt conveyors For flat or upper belt conveyors, the drive system is generally composed of motor, hydraulic coupling and reducer. Due to severe moment-limiting fluid or internal leakage; ④ The setting pressure of the boom hydraulic cylinder overload valve is too low or the internal leakage is serious, and ⑤ the oil return path is not smooth and so on. Considering these reasons, some factors are eliminated according to the existing inspection results, and the scope of the fault is narrowed until the fault point is found and eliminated.

In the fault diagnosis of the hydraulic system of construction machinery during field construction, according to the working principle of the hydraulic system, it is necessary to master some laws and common sense, and to analyze whether the failure is early or gradual. If it is early-onset, it is mostly due to improper adjustment. If it is progressive, it is often caused by component wear, corrosion, fatigue, and aging. Second, it is necessary to analyze whether it is a wearing part or a non-wearing part. If it is under high frequency and heavy load The moving parts are hydraulic components that are prone to failure, such as the plunger pair, oil distribution plate pair, variable servo, and hydraulic cylinder of the hydraulic pump, while the components at low frequency, light load, or relatively stationary are less prone to failure. Such as directional valve, sequence valve, slide valve, etc. After mastering these rules, it can play a positive role in quickly determining the fault location.

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